10b57cec5SDimitry Andric //===- Decl.cpp - Declaration AST Node Implementation ---------------------===// 20b57cec5SDimitry Andric // 30b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 40b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 50b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 60b57cec5SDimitry Andric // 70b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 80b57cec5SDimitry Andric // 90b57cec5SDimitry Andric // This file implements the Decl subclasses. 100b57cec5SDimitry Andric // 110b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 120b57cec5SDimitry Andric 130b57cec5SDimitry Andric #include "clang/AST/Decl.h" 140b57cec5SDimitry Andric #include "Linkage.h" 150b57cec5SDimitry Andric #include "clang/AST/ASTContext.h" 160b57cec5SDimitry Andric #include "clang/AST/ASTDiagnostic.h" 170b57cec5SDimitry Andric #include "clang/AST/ASTLambda.h" 180b57cec5SDimitry Andric #include "clang/AST/ASTMutationListener.h" 19480093f4SDimitry Andric #include "clang/AST/Attr.h" 200b57cec5SDimitry Andric #include "clang/AST/CanonicalType.h" 210b57cec5SDimitry Andric #include "clang/AST/DeclBase.h" 220b57cec5SDimitry Andric #include "clang/AST/DeclCXX.h" 230b57cec5SDimitry Andric #include "clang/AST/DeclObjC.h" 240b57cec5SDimitry Andric #include "clang/AST/DeclOpenMP.h" 250b57cec5SDimitry Andric #include "clang/AST/DeclTemplate.h" 260b57cec5SDimitry Andric #include "clang/AST/DeclarationName.h" 270b57cec5SDimitry Andric #include "clang/AST/Expr.h" 280b57cec5SDimitry Andric #include "clang/AST/ExprCXX.h" 290b57cec5SDimitry Andric #include "clang/AST/ExternalASTSource.h" 300b57cec5SDimitry Andric #include "clang/AST/ODRHash.h" 310b57cec5SDimitry Andric #include "clang/AST/PrettyDeclStackTrace.h" 320b57cec5SDimitry Andric #include "clang/AST/PrettyPrinter.h" 330b57cec5SDimitry Andric #include "clang/AST/Redeclarable.h" 340b57cec5SDimitry Andric #include "clang/AST/Stmt.h" 350b57cec5SDimitry Andric #include "clang/AST/TemplateBase.h" 360b57cec5SDimitry Andric #include "clang/AST/Type.h" 370b57cec5SDimitry Andric #include "clang/AST/TypeLoc.h" 380b57cec5SDimitry Andric #include "clang/Basic/Builtins.h" 390b57cec5SDimitry Andric #include "clang/Basic/IdentifierTable.h" 400b57cec5SDimitry Andric #include "clang/Basic/LLVM.h" 410b57cec5SDimitry Andric #include "clang/Basic/LangOptions.h" 420b57cec5SDimitry Andric #include "clang/Basic/Linkage.h" 430b57cec5SDimitry Andric #include "clang/Basic/Module.h" 440b57cec5SDimitry Andric #include "clang/Basic/PartialDiagnostic.h" 450b57cec5SDimitry Andric #include "clang/Basic/SanitizerBlacklist.h" 460b57cec5SDimitry Andric #include "clang/Basic/Sanitizers.h" 470b57cec5SDimitry Andric #include "clang/Basic/SourceLocation.h" 480b57cec5SDimitry Andric #include "clang/Basic/SourceManager.h" 490b57cec5SDimitry Andric #include "clang/Basic/Specifiers.h" 500b57cec5SDimitry Andric #include "clang/Basic/TargetCXXABI.h" 510b57cec5SDimitry Andric #include "clang/Basic/TargetInfo.h" 520b57cec5SDimitry Andric #include "clang/Basic/Visibility.h" 530b57cec5SDimitry Andric #include "llvm/ADT/APSInt.h" 540b57cec5SDimitry Andric #include "llvm/ADT/ArrayRef.h" 550b57cec5SDimitry Andric #include "llvm/ADT/None.h" 560b57cec5SDimitry Andric #include "llvm/ADT/Optional.h" 570b57cec5SDimitry Andric #include "llvm/ADT/STLExtras.h" 580b57cec5SDimitry Andric #include "llvm/ADT/SmallVector.h" 590b57cec5SDimitry Andric #include "llvm/ADT/StringRef.h" 60480093f4SDimitry Andric #include "llvm/ADT/StringSwitch.h" 610b57cec5SDimitry Andric #include "llvm/ADT/Triple.h" 620b57cec5SDimitry Andric #include "llvm/Support/Casting.h" 630b57cec5SDimitry Andric #include "llvm/Support/ErrorHandling.h" 640b57cec5SDimitry Andric #include "llvm/Support/raw_ostream.h" 650b57cec5SDimitry Andric #include <algorithm> 660b57cec5SDimitry Andric #include <cassert> 670b57cec5SDimitry Andric #include <cstddef> 680b57cec5SDimitry Andric #include <cstring> 690b57cec5SDimitry Andric #include <memory> 700b57cec5SDimitry Andric #include <string> 710b57cec5SDimitry Andric #include <tuple> 720b57cec5SDimitry Andric #include <type_traits> 730b57cec5SDimitry Andric 740b57cec5SDimitry Andric using namespace clang; 750b57cec5SDimitry Andric 760b57cec5SDimitry Andric Decl *clang::getPrimaryMergedDecl(Decl *D) { 770b57cec5SDimitry Andric return D->getASTContext().getPrimaryMergedDecl(D); 780b57cec5SDimitry Andric } 790b57cec5SDimitry Andric 800b57cec5SDimitry Andric void PrettyDeclStackTraceEntry::print(raw_ostream &OS) const { 810b57cec5SDimitry Andric SourceLocation Loc = this->Loc; 820b57cec5SDimitry Andric if (!Loc.isValid() && TheDecl) Loc = TheDecl->getLocation(); 830b57cec5SDimitry Andric if (Loc.isValid()) { 840b57cec5SDimitry Andric Loc.print(OS, Context.getSourceManager()); 850b57cec5SDimitry Andric OS << ": "; 860b57cec5SDimitry Andric } 870b57cec5SDimitry Andric OS << Message; 880b57cec5SDimitry Andric 890b57cec5SDimitry Andric if (auto *ND = dyn_cast_or_null<NamedDecl>(TheDecl)) { 900b57cec5SDimitry Andric OS << " '"; 910b57cec5SDimitry Andric ND->getNameForDiagnostic(OS, Context.getPrintingPolicy(), true); 920b57cec5SDimitry Andric OS << "'"; 930b57cec5SDimitry Andric } 940b57cec5SDimitry Andric 950b57cec5SDimitry Andric OS << '\n'; 960b57cec5SDimitry Andric } 970b57cec5SDimitry Andric 980b57cec5SDimitry Andric // Defined here so that it can be inlined into its direct callers. 990b57cec5SDimitry Andric bool Decl::isOutOfLine() const { 1000b57cec5SDimitry Andric return !getLexicalDeclContext()->Equals(getDeclContext()); 1010b57cec5SDimitry Andric } 1020b57cec5SDimitry Andric 1030b57cec5SDimitry Andric TranslationUnitDecl::TranslationUnitDecl(ASTContext &ctx) 1040b57cec5SDimitry Andric : Decl(TranslationUnit, nullptr, SourceLocation()), 1050b57cec5SDimitry Andric DeclContext(TranslationUnit), Ctx(ctx) {} 1060b57cec5SDimitry Andric 1070b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 1080b57cec5SDimitry Andric // NamedDecl Implementation 1090b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 1100b57cec5SDimitry Andric 1110b57cec5SDimitry Andric // Visibility rules aren't rigorously externally specified, but here 1120b57cec5SDimitry Andric // are the basic principles behind what we implement: 1130b57cec5SDimitry Andric // 1140b57cec5SDimitry Andric // 1. An explicit visibility attribute is generally a direct expression 1150b57cec5SDimitry Andric // of the user's intent and should be honored. Only the innermost 1160b57cec5SDimitry Andric // visibility attribute applies. If no visibility attribute applies, 1170b57cec5SDimitry Andric // global visibility settings are considered. 1180b57cec5SDimitry Andric // 1190b57cec5SDimitry Andric // 2. There is one caveat to the above: on or in a template pattern, 1200b57cec5SDimitry Andric // an explicit visibility attribute is just a default rule, and 1210b57cec5SDimitry Andric // visibility can be decreased by the visibility of template 1220b57cec5SDimitry Andric // arguments. But this, too, has an exception: an attribute on an 1230b57cec5SDimitry Andric // explicit specialization or instantiation causes all the visibility 1240b57cec5SDimitry Andric // restrictions of the template arguments to be ignored. 1250b57cec5SDimitry Andric // 1260b57cec5SDimitry Andric // 3. A variable that does not otherwise have explicit visibility can 1270b57cec5SDimitry Andric // be restricted by the visibility of its type. 1280b57cec5SDimitry Andric // 1290b57cec5SDimitry Andric // 4. A visibility restriction is explicit if it comes from an 1300b57cec5SDimitry Andric // attribute (or something like it), not a global visibility setting. 1310b57cec5SDimitry Andric // When emitting a reference to an external symbol, visibility 1320b57cec5SDimitry Andric // restrictions are ignored unless they are explicit. 1330b57cec5SDimitry Andric // 1340b57cec5SDimitry Andric // 5. When computing the visibility of a non-type, including a 1350b57cec5SDimitry Andric // non-type member of a class, only non-type visibility restrictions 1360b57cec5SDimitry Andric // are considered: the 'visibility' attribute, global value-visibility 1370b57cec5SDimitry Andric // settings, and a few special cases like __private_extern. 1380b57cec5SDimitry Andric // 1390b57cec5SDimitry Andric // 6. When computing the visibility of a type, including a type member 1400b57cec5SDimitry Andric // of a class, only type visibility restrictions are considered: 1410b57cec5SDimitry Andric // the 'type_visibility' attribute and global type-visibility settings. 1420b57cec5SDimitry Andric // However, a 'visibility' attribute counts as a 'type_visibility' 1430b57cec5SDimitry Andric // attribute on any declaration that only has the former. 1440b57cec5SDimitry Andric // 1450b57cec5SDimitry Andric // The visibility of a "secondary" entity, like a template argument, 1460b57cec5SDimitry Andric // is computed using the kind of that entity, not the kind of the 1470b57cec5SDimitry Andric // primary entity for which we are computing visibility. For example, 1480b57cec5SDimitry Andric // the visibility of a specialization of either of these templates: 1490b57cec5SDimitry Andric // template <class T, bool (&compare)(T, X)> bool has_match(list<T>, X); 1500b57cec5SDimitry Andric // template <class T, bool (&compare)(T, X)> class matcher; 1510b57cec5SDimitry Andric // is restricted according to the type visibility of the argument 'T', 1520b57cec5SDimitry Andric // the type visibility of 'bool(&)(T,X)', and the value visibility of 1530b57cec5SDimitry Andric // the argument function 'compare'. That 'has_match' is a value 1540b57cec5SDimitry Andric // and 'matcher' is a type only matters when looking for attributes 1550b57cec5SDimitry Andric // and settings from the immediate context. 1560b57cec5SDimitry Andric 1570b57cec5SDimitry Andric /// Does this computation kind permit us to consider additional 1580b57cec5SDimitry Andric /// visibility settings from attributes and the like? 1590b57cec5SDimitry Andric static bool hasExplicitVisibilityAlready(LVComputationKind computation) { 1600b57cec5SDimitry Andric return computation.IgnoreExplicitVisibility; 1610b57cec5SDimitry Andric } 1620b57cec5SDimitry Andric 1630b57cec5SDimitry Andric /// Given an LVComputationKind, return one of the same type/value sort 1640b57cec5SDimitry Andric /// that records that it already has explicit visibility. 1650b57cec5SDimitry Andric static LVComputationKind 1660b57cec5SDimitry Andric withExplicitVisibilityAlready(LVComputationKind Kind) { 1670b57cec5SDimitry Andric Kind.IgnoreExplicitVisibility = true; 1680b57cec5SDimitry Andric return Kind; 1690b57cec5SDimitry Andric } 1700b57cec5SDimitry Andric 1710b57cec5SDimitry Andric static Optional<Visibility> getExplicitVisibility(const NamedDecl *D, 1720b57cec5SDimitry Andric LVComputationKind kind) { 1730b57cec5SDimitry Andric assert(!kind.IgnoreExplicitVisibility && 1740b57cec5SDimitry Andric "asking for explicit visibility when we shouldn't be"); 1750b57cec5SDimitry Andric return D->getExplicitVisibility(kind.getExplicitVisibilityKind()); 1760b57cec5SDimitry Andric } 1770b57cec5SDimitry Andric 1780b57cec5SDimitry Andric /// Is the given declaration a "type" or a "value" for the purposes of 1790b57cec5SDimitry Andric /// visibility computation? 1800b57cec5SDimitry Andric static bool usesTypeVisibility(const NamedDecl *D) { 1810b57cec5SDimitry Andric return isa<TypeDecl>(D) || 1820b57cec5SDimitry Andric isa<ClassTemplateDecl>(D) || 1830b57cec5SDimitry Andric isa<ObjCInterfaceDecl>(D); 1840b57cec5SDimitry Andric } 1850b57cec5SDimitry Andric 1860b57cec5SDimitry Andric /// Does the given declaration have member specialization information, 1870b57cec5SDimitry Andric /// and if so, is it an explicit specialization? 1880b57cec5SDimitry Andric template <class T> static typename 1890b57cec5SDimitry Andric std::enable_if<!std::is_base_of<RedeclarableTemplateDecl, T>::value, bool>::type 1900b57cec5SDimitry Andric isExplicitMemberSpecialization(const T *D) { 1910b57cec5SDimitry Andric if (const MemberSpecializationInfo *member = 1920b57cec5SDimitry Andric D->getMemberSpecializationInfo()) { 1930b57cec5SDimitry Andric return member->isExplicitSpecialization(); 1940b57cec5SDimitry Andric } 1950b57cec5SDimitry Andric return false; 1960b57cec5SDimitry Andric } 1970b57cec5SDimitry Andric 1980b57cec5SDimitry Andric /// For templates, this question is easier: a member template can't be 1990b57cec5SDimitry Andric /// explicitly instantiated, so there's a single bit indicating whether 2000b57cec5SDimitry Andric /// or not this is an explicit member specialization. 2010b57cec5SDimitry Andric static bool isExplicitMemberSpecialization(const RedeclarableTemplateDecl *D) { 2020b57cec5SDimitry Andric return D->isMemberSpecialization(); 2030b57cec5SDimitry Andric } 2040b57cec5SDimitry Andric 2050b57cec5SDimitry Andric /// Given a visibility attribute, return the explicit visibility 2060b57cec5SDimitry Andric /// associated with it. 2070b57cec5SDimitry Andric template <class T> 2080b57cec5SDimitry Andric static Visibility getVisibilityFromAttr(const T *attr) { 2090b57cec5SDimitry Andric switch (attr->getVisibility()) { 2100b57cec5SDimitry Andric case T::Default: 2110b57cec5SDimitry Andric return DefaultVisibility; 2120b57cec5SDimitry Andric case T::Hidden: 2130b57cec5SDimitry Andric return HiddenVisibility; 2140b57cec5SDimitry Andric case T::Protected: 2150b57cec5SDimitry Andric return ProtectedVisibility; 2160b57cec5SDimitry Andric } 2170b57cec5SDimitry Andric llvm_unreachable("bad visibility kind"); 2180b57cec5SDimitry Andric } 2190b57cec5SDimitry Andric 2200b57cec5SDimitry Andric /// Return the explicit visibility of the given declaration. 2210b57cec5SDimitry Andric static Optional<Visibility> getVisibilityOf(const NamedDecl *D, 2220b57cec5SDimitry Andric NamedDecl::ExplicitVisibilityKind kind) { 2230b57cec5SDimitry Andric // If we're ultimately computing the visibility of a type, look for 2240b57cec5SDimitry Andric // a 'type_visibility' attribute before looking for 'visibility'. 2250b57cec5SDimitry Andric if (kind == NamedDecl::VisibilityForType) { 2260b57cec5SDimitry Andric if (const auto *A = D->getAttr<TypeVisibilityAttr>()) { 2270b57cec5SDimitry Andric return getVisibilityFromAttr(A); 2280b57cec5SDimitry Andric } 2290b57cec5SDimitry Andric } 2300b57cec5SDimitry Andric 2310b57cec5SDimitry Andric // If this declaration has an explicit visibility attribute, use it. 2320b57cec5SDimitry Andric if (const auto *A = D->getAttr<VisibilityAttr>()) { 2330b57cec5SDimitry Andric return getVisibilityFromAttr(A); 2340b57cec5SDimitry Andric } 2350b57cec5SDimitry Andric 2360b57cec5SDimitry Andric return None; 2370b57cec5SDimitry Andric } 2380b57cec5SDimitry Andric 2390b57cec5SDimitry Andric LinkageInfo LinkageComputer::getLVForType(const Type &T, 2400b57cec5SDimitry Andric LVComputationKind computation) { 2410b57cec5SDimitry Andric if (computation.IgnoreAllVisibility) 2420b57cec5SDimitry Andric return LinkageInfo(T.getLinkage(), DefaultVisibility, true); 2430b57cec5SDimitry Andric return getTypeLinkageAndVisibility(&T); 2440b57cec5SDimitry Andric } 2450b57cec5SDimitry Andric 2460b57cec5SDimitry Andric /// Get the most restrictive linkage for the types in the given 2470b57cec5SDimitry Andric /// template parameter list. For visibility purposes, template 2480b57cec5SDimitry Andric /// parameters are part of the signature of a template. 2490b57cec5SDimitry Andric LinkageInfo LinkageComputer::getLVForTemplateParameterList( 2500b57cec5SDimitry Andric const TemplateParameterList *Params, LVComputationKind computation) { 2510b57cec5SDimitry Andric LinkageInfo LV; 2520b57cec5SDimitry Andric for (const NamedDecl *P : *Params) { 2530b57cec5SDimitry Andric // Template type parameters are the most common and never 2540b57cec5SDimitry Andric // contribute to visibility, pack or not. 2550b57cec5SDimitry Andric if (isa<TemplateTypeParmDecl>(P)) 2560b57cec5SDimitry Andric continue; 2570b57cec5SDimitry Andric 2580b57cec5SDimitry Andric // Non-type template parameters can be restricted by the value type, e.g. 2590b57cec5SDimitry Andric // template <enum X> class A { ... }; 2600b57cec5SDimitry Andric // We have to be careful here, though, because we can be dealing with 2610b57cec5SDimitry Andric // dependent types. 2620b57cec5SDimitry Andric if (const auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(P)) { 2630b57cec5SDimitry Andric // Handle the non-pack case first. 2640b57cec5SDimitry Andric if (!NTTP->isExpandedParameterPack()) { 2650b57cec5SDimitry Andric if (!NTTP->getType()->isDependentType()) { 2660b57cec5SDimitry Andric LV.merge(getLVForType(*NTTP->getType(), computation)); 2670b57cec5SDimitry Andric } 2680b57cec5SDimitry Andric continue; 2690b57cec5SDimitry Andric } 2700b57cec5SDimitry Andric 2710b57cec5SDimitry Andric // Look at all the types in an expanded pack. 2720b57cec5SDimitry Andric for (unsigned i = 0, n = NTTP->getNumExpansionTypes(); i != n; ++i) { 2730b57cec5SDimitry Andric QualType type = NTTP->getExpansionType(i); 2740b57cec5SDimitry Andric if (!type->isDependentType()) 2750b57cec5SDimitry Andric LV.merge(getTypeLinkageAndVisibility(type)); 2760b57cec5SDimitry Andric } 2770b57cec5SDimitry Andric continue; 2780b57cec5SDimitry Andric } 2790b57cec5SDimitry Andric 2800b57cec5SDimitry Andric // Template template parameters can be restricted by their 2810b57cec5SDimitry Andric // template parameters, recursively. 2820b57cec5SDimitry Andric const auto *TTP = cast<TemplateTemplateParmDecl>(P); 2830b57cec5SDimitry Andric 2840b57cec5SDimitry Andric // Handle the non-pack case first. 2850b57cec5SDimitry Andric if (!TTP->isExpandedParameterPack()) { 2860b57cec5SDimitry Andric LV.merge(getLVForTemplateParameterList(TTP->getTemplateParameters(), 2870b57cec5SDimitry Andric computation)); 2880b57cec5SDimitry Andric continue; 2890b57cec5SDimitry Andric } 2900b57cec5SDimitry Andric 2910b57cec5SDimitry Andric // Look at all expansions in an expanded pack. 2920b57cec5SDimitry Andric for (unsigned i = 0, n = TTP->getNumExpansionTemplateParameters(); 2930b57cec5SDimitry Andric i != n; ++i) { 2940b57cec5SDimitry Andric LV.merge(getLVForTemplateParameterList( 2950b57cec5SDimitry Andric TTP->getExpansionTemplateParameters(i), computation)); 2960b57cec5SDimitry Andric } 2970b57cec5SDimitry Andric } 2980b57cec5SDimitry Andric 2990b57cec5SDimitry Andric return LV; 3000b57cec5SDimitry Andric } 3010b57cec5SDimitry Andric 3020b57cec5SDimitry Andric static const Decl *getOutermostFuncOrBlockContext(const Decl *D) { 3030b57cec5SDimitry Andric const Decl *Ret = nullptr; 3040b57cec5SDimitry Andric const DeclContext *DC = D->getDeclContext(); 3050b57cec5SDimitry Andric while (DC->getDeclKind() != Decl::TranslationUnit) { 3060b57cec5SDimitry Andric if (isa<FunctionDecl>(DC) || isa<BlockDecl>(DC)) 3070b57cec5SDimitry Andric Ret = cast<Decl>(DC); 3080b57cec5SDimitry Andric DC = DC->getParent(); 3090b57cec5SDimitry Andric } 3100b57cec5SDimitry Andric return Ret; 3110b57cec5SDimitry Andric } 3120b57cec5SDimitry Andric 3130b57cec5SDimitry Andric /// Get the most restrictive linkage for the types and 3140b57cec5SDimitry Andric /// declarations in the given template argument list. 3150b57cec5SDimitry Andric /// 3160b57cec5SDimitry Andric /// Note that we don't take an LVComputationKind because we always 3170b57cec5SDimitry Andric /// want to honor the visibility of template arguments in the same way. 3180b57cec5SDimitry Andric LinkageInfo 3190b57cec5SDimitry Andric LinkageComputer::getLVForTemplateArgumentList(ArrayRef<TemplateArgument> Args, 3200b57cec5SDimitry Andric LVComputationKind computation) { 3210b57cec5SDimitry Andric LinkageInfo LV; 3220b57cec5SDimitry Andric 3230b57cec5SDimitry Andric for (const TemplateArgument &Arg : Args) { 3240b57cec5SDimitry Andric switch (Arg.getKind()) { 3250b57cec5SDimitry Andric case TemplateArgument::Null: 3260b57cec5SDimitry Andric case TemplateArgument::Integral: 3270b57cec5SDimitry Andric case TemplateArgument::Expression: 3280b57cec5SDimitry Andric continue; 3290b57cec5SDimitry Andric 3300b57cec5SDimitry Andric case TemplateArgument::Type: 3310b57cec5SDimitry Andric LV.merge(getLVForType(*Arg.getAsType(), computation)); 3320b57cec5SDimitry Andric continue; 3330b57cec5SDimitry Andric 3340b57cec5SDimitry Andric case TemplateArgument::Declaration: { 3350b57cec5SDimitry Andric const NamedDecl *ND = Arg.getAsDecl(); 3360b57cec5SDimitry Andric assert(!usesTypeVisibility(ND)); 3370b57cec5SDimitry Andric LV.merge(getLVForDecl(ND, computation)); 3380b57cec5SDimitry Andric continue; 3390b57cec5SDimitry Andric } 3400b57cec5SDimitry Andric 3410b57cec5SDimitry Andric case TemplateArgument::NullPtr: 3420b57cec5SDimitry Andric LV.merge(getTypeLinkageAndVisibility(Arg.getNullPtrType())); 3430b57cec5SDimitry Andric continue; 3440b57cec5SDimitry Andric 3450b57cec5SDimitry Andric case TemplateArgument::Template: 3460b57cec5SDimitry Andric case TemplateArgument::TemplateExpansion: 3470b57cec5SDimitry Andric if (TemplateDecl *Template = 3480b57cec5SDimitry Andric Arg.getAsTemplateOrTemplatePattern().getAsTemplateDecl()) 3490b57cec5SDimitry Andric LV.merge(getLVForDecl(Template, computation)); 3500b57cec5SDimitry Andric continue; 3510b57cec5SDimitry Andric 3520b57cec5SDimitry Andric case TemplateArgument::Pack: 3530b57cec5SDimitry Andric LV.merge(getLVForTemplateArgumentList(Arg.getPackAsArray(), computation)); 3540b57cec5SDimitry Andric continue; 3550b57cec5SDimitry Andric } 3560b57cec5SDimitry Andric llvm_unreachable("bad template argument kind"); 3570b57cec5SDimitry Andric } 3580b57cec5SDimitry Andric 3590b57cec5SDimitry Andric return LV; 3600b57cec5SDimitry Andric } 3610b57cec5SDimitry Andric 3620b57cec5SDimitry Andric LinkageInfo 3630b57cec5SDimitry Andric LinkageComputer::getLVForTemplateArgumentList(const TemplateArgumentList &TArgs, 3640b57cec5SDimitry Andric LVComputationKind computation) { 3650b57cec5SDimitry Andric return getLVForTemplateArgumentList(TArgs.asArray(), computation); 3660b57cec5SDimitry Andric } 3670b57cec5SDimitry Andric 3680b57cec5SDimitry Andric static bool shouldConsiderTemplateVisibility(const FunctionDecl *fn, 3690b57cec5SDimitry Andric const FunctionTemplateSpecializationInfo *specInfo) { 3700b57cec5SDimitry Andric // Include visibility from the template parameters and arguments 3710b57cec5SDimitry Andric // only if this is not an explicit instantiation or specialization 3720b57cec5SDimitry Andric // with direct explicit visibility. (Implicit instantiations won't 3730b57cec5SDimitry Andric // have a direct attribute.) 3740b57cec5SDimitry Andric if (!specInfo->isExplicitInstantiationOrSpecialization()) 3750b57cec5SDimitry Andric return true; 3760b57cec5SDimitry Andric 3770b57cec5SDimitry Andric return !fn->hasAttr<VisibilityAttr>(); 3780b57cec5SDimitry Andric } 3790b57cec5SDimitry Andric 3800b57cec5SDimitry Andric /// Merge in template-related linkage and visibility for the given 3810b57cec5SDimitry Andric /// function template specialization. 3820b57cec5SDimitry Andric /// 3830b57cec5SDimitry Andric /// We don't need a computation kind here because we can assume 3840b57cec5SDimitry Andric /// LVForValue. 3850b57cec5SDimitry Andric /// 3860b57cec5SDimitry Andric /// \param[out] LV the computation to use for the parent 3870b57cec5SDimitry Andric void LinkageComputer::mergeTemplateLV( 3880b57cec5SDimitry Andric LinkageInfo &LV, const FunctionDecl *fn, 3890b57cec5SDimitry Andric const FunctionTemplateSpecializationInfo *specInfo, 3900b57cec5SDimitry Andric LVComputationKind computation) { 3910b57cec5SDimitry Andric bool considerVisibility = 3920b57cec5SDimitry Andric shouldConsiderTemplateVisibility(fn, specInfo); 3930b57cec5SDimitry Andric 3940b57cec5SDimitry Andric // Merge information from the template parameters. 3950b57cec5SDimitry Andric FunctionTemplateDecl *temp = specInfo->getTemplate(); 3960b57cec5SDimitry Andric LinkageInfo tempLV = 3970b57cec5SDimitry Andric getLVForTemplateParameterList(temp->getTemplateParameters(), computation); 3980b57cec5SDimitry Andric LV.mergeMaybeWithVisibility(tempLV, considerVisibility); 3990b57cec5SDimitry Andric 4000b57cec5SDimitry Andric // Merge information from the template arguments. 4010b57cec5SDimitry Andric const TemplateArgumentList &templateArgs = *specInfo->TemplateArguments; 4020b57cec5SDimitry Andric LinkageInfo argsLV = getLVForTemplateArgumentList(templateArgs, computation); 4030b57cec5SDimitry Andric LV.mergeMaybeWithVisibility(argsLV, considerVisibility); 4040b57cec5SDimitry Andric } 4050b57cec5SDimitry Andric 4060b57cec5SDimitry Andric /// Does the given declaration have a direct visibility attribute 4070b57cec5SDimitry Andric /// that would match the given rules? 4080b57cec5SDimitry Andric static bool hasDirectVisibilityAttribute(const NamedDecl *D, 4090b57cec5SDimitry Andric LVComputationKind computation) { 4100b57cec5SDimitry Andric if (computation.IgnoreAllVisibility) 4110b57cec5SDimitry Andric return false; 4120b57cec5SDimitry Andric 4130b57cec5SDimitry Andric return (computation.isTypeVisibility() && D->hasAttr<TypeVisibilityAttr>()) || 4140b57cec5SDimitry Andric D->hasAttr<VisibilityAttr>(); 4150b57cec5SDimitry Andric } 4160b57cec5SDimitry Andric 4170b57cec5SDimitry Andric /// Should we consider visibility associated with the template 4180b57cec5SDimitry Andric /// arguments and parameters of the given class template specialization? 4190b57cec5SDimitry Andric static bool shouldConsiderTemplateVisibility( 4200b57cec5SDimitry Andric const ClassTemplateSpecializationDecl *spec, 4210b57cec5SDimitry Andric LVComputationKind computation) { 4220b57cec5SDimitry Andric // Include visibility from the template parameters and arguments 4230b57cec5SDimitry Andric // only if this is not an explicit instantiation or specialization 4240b57cec5SDimitry Andric // with direct explicit visibility (and note that implicit 4250b57cec5SDimitry Andric // instantiations won't have a direct attribute). 4260b57cec5SDimitry Andric // 4270b57cec5SDimitry Andric // Furthermore, we want to ignore template parameters and arguments 4280b57cec5SDimitry Andric // for an explicit specialization when computing the visibility of a 4290b57cec5SDimitry Andric // member thereof with explicit visibility. 4300b57cec5SDimitry Andric // 4310b57cec5SDimitry Andric // This is a bit complex; let's unpack it. 4320b57cec5SDimitry Andric // 4330b57cec5SDimitry Andric // An explicit class specialization is an independent, top-level 4340b57cec5SDimitry Andric // declaration. As such, if it or any of its members has an 4350b57cec5SDimitry Andric // explicit visibility attribute, that must directly express the 4360b57cec5SDimitry Andric // user's intent, and we should honor it. The same logic applies to 4370b57cec5SDimitry Andric // an explicit instantiation of a member of such a thing. 4380b57cec5SDimitry Andric 4390b57cec5SDimitry Andric // Fast path: if this is not an explicit instantiation or 4400b57cec5SDimitry Andric // specialization, we always want to consider template-related 4410b57cec5SDimitry Andric // visibility restrictions. 4420b57cec5SDimitry Andric if (!spec->isExplicitInstantiationOrSpecialization()) 4430b57cec5SDimitry Andric return true; 4440b57cec5SDimitry Andric 4450b57cec5SDimitry Andric // This is the 'member thereof' check. 4460b57cec5SDimitry Andric if (spec->isExplicitSpecialization() && 4470b57cec5SDimitry Andric hasExplicitVisibilityAlready(computation)) 4480b57cec5SDimitry Andric return false; 4490b57cec5SDimitry Andric 4500b57cec5SDimitry Andric return !hasDirectVisibilityAttribute(spec, computation); 4510b57cec5SDimitry Andric } 4520b57cec5SDimitry Andric 4530b57cec5SDimitry Andric /// Merge in template-related linkage and visibility for the given 4540b57cec5SDimitry Andric /// class template specialization. 4550b57cec5SDimitry Andric void LinkageComputer::mergeTemplateLV( 4560b57cec5SDimitry Andric LinkageInfo &LV, const ClassTemplateSpecializationDecl *spec, 4570b57cec5SDimitry Andric LVComputationKind computation) { 4580b57cec5SDimitry Andric bool considerVisibility = shouldConsiderTemplateVisibility(spec, computation); 4590b57cec5SDimitry Andric 4600b57cec5SDimitry Andric // Merge information from the template parameters, but ignore 4610b57cec5SDimitry Andric // visibility if we're only considering template arguments. 4620b57cec5SDimitry Andric 4630b57cec5SDimitry Andric ClassTemplateDecl *temp = spec->getSpecializedTemplate(); 4640b57cec5SDimitry Andric LinkageInfo tempLV = 4650b57cec5SDimitry Andric getLVForTemplateParameterList(temp->getTemplateParameters(), computation); 4660b57cec5SDimitry Andric LV.mergeMaybeWithVisibility(tempLV, 4670b57cec5SDimitry Andric considerVisibility && !hasExplicitVisibilityAlready(computation)); 4680b57cec5SDimitry Andric 4690b57cec5SDimitry Andric // Merge information from the template arguments. We ignore 4700b57cec5SDimitry Andric // template-argument visibility if we've got an explicit 4710b57cec5SDimitry Andric // instantiation with a visibility attribute. 4720b57cec5SDimitry Andric const TemplateArgumentList &templateArgs = spec->getTemplateArgs(); 4730b57cec5SDimitry Andric LinkageInfo argsLV = getLVForTemplateArgumentList(templateArgs, computation); 4740b57cec5SDimitry Andric if (considerVisibility) 4750b57cec5SDimitry Andric LV.mergeVisibility(argsLV); 4760b57cec5SDimitry Andric LV.mergeExternalVisibility(argsLV); 4770b57cec5SDimitry Andric } 4780b57cec5SDimitry Andric 4790b57cec5SDimitry Andric /// Should we consider visibility associated with the template 4800b57cec5SDimitry Andric /// arguments and parameters of the given variable template 4810b57cec5SDimitry Andric /// specialization? As usual, follow class template specialization 4820b57cec5SDimitry Andric /// logic up to initialization. 4830b57cec5SDimitry Andric static bool shouldConsiderTemplateVisibility( 4840b57cec5SDimitry Andric const VarTemplateSpecializationDecl *spec, 4850b57cec5SDimitry Andric LVComputationKind computation) { 4860b57cec5SDimitry Andric // Include visibility from the template parameters and arguments 4870b57cec5SDimitry Andric // only if this is not an explicit instantiation or specialization 4880b57cec5SDimitry Andric // with direct explicit visibility (and note that implicit 4890b57cec5SDimitry Andric // instantiations won't have a direct attribute). 4900b57cec5SDimitry Andric if (!spec->isExplicitInstantiationOrSpecialization()) 4910b57cec5SDimitry Andric return true; 4920b57cec5SDimitry Andric 4930b57cec5SDimitry Andric // An explicit variable specialization is an independent, top-level 4940b57cec5SDimitry Andric // declaration. As such, if it has an explicit visibility attribute, 4950b57cec5SDimitry Andric // that must directly express the user's intent, and we should honor 4960b57cec5SDimitry Andric // it. 4970b57cec5SDimitry Andric if (spec->isExplicitSpecialization() && 4980b57cec5SDimitry Andric hasExplicitVisibilityAlready(computation)) 4990b57cec5SDimitry Andric return false; 5000b57cec5SDimitry Andric 5010b57cec5SDimitry Andric return !hasDirectVisibilityAttribute(spec, computation); 5020b57cec5SDimitry Andric } 5030b57cec5SDimitry Andric 5040b57cec5SDimitry Andric /// Merge in template-related linkage and visibility for the given 5050b57cec5SDimitry Andric /// variable template specialization. As usual, follow class template 5060b57cec5SDimitry Andric /// specialization logic up to initialization. 5070b57cec5SDimitry Andric void LinkageComputer::mergeTemplateLV(LinkageInfo &LV, 5080b57cec5SDimitry Andric const VarTemplateSpecializationDecl *spec, 5090b57cec5SDimitry Andric LVComputationKind computation) { 5100b57cec5SDimitry Andric bool considerVisibility = shouldConsiderTemplateVisibility(spec, computation); 5110b57cec5SDimitry Andric 5120b57cec5SDimitry Andric // Merge information from the template parameters, but ignore 5130b57cec5SDimitry Andric // visibility if we're only considering template arguments. 5140b57cec5SDimitry Andric 5150b57cec5SDimitry Andric VarTemplateDecl *temp = spec->getSpecializedTemplate(); 5160b57cec5SDimitry Andric LinkageInfo tempLV = 5170b57cec5SDimitry Andric getLVForTemplateParameterList(temp->getTemplateParameters(), computation); 5180b57cec5SDimitry Andric LV.mergeMaybeWithVisibility(tempLV, 5190b57cec5SDimitry Andric considerVisibility && !hasExplicitVisibilityAlready(computation)); 5200b57cec5SDimitry Andric 5210b57cec5SDimitry Andric // Merge information from the template arguments. We ignore 5220b57cec5SDimitry Andric // template-argument visibility if we've got an explicit 5230b57cec5SDimitry Andric // instantiation with a visibility attribute. 5240b57cec5SDimitry Andric const TemplateArgumentList &templateArgs = spec->getTemplateArgs(); 5250b57cec5SDimitry Andric LinkageInfo argsLV = getLVForTemplateArgumentList(templateArgs, computation); 5260b57cec5SDimitry Andric if (considerVisibility) 5270b57cec5SDimitry Andric LV.mergeVisibility(argsLV); 5280b57cec5SDimitry Andric LV.mergeExternalVisibility(argsLV); 5290b57cec5SDimitry Andric } 5300b57cec5SDimitry Andric 5310b57cec5SDimitry Andric static bool useInlineVisibilityHidden(const NamedDecl *D) { 5320b57cec5SDimitry Andric // FIXME: we should warn if -fvisibility-inlines-hidden is used with c. 5330b57cec5SDimitry Andric const LangOptions &Opts = D->getASTContext().getLangOpts(); 5340b57cec5SDimitry Andric if (!Opts.CPlusPlus || !Opts.InlineVisibilityHidden) 5350b57cec5SDimitry Andric return false; 5360b57cec5SDimitry Andric 5370b57cec5SDimitry Andric const auto *FD = dyn_cast<FunctionDecl>(D); 5380b57cec5SDimitry Andric if (!FD) 5390b57cec5SDimitry Andric return false; 5400b57cec5SDimitry Andric 5410b57cec5SDimitry Andric TemplateSpecializationKind TSK = TSK_Undeclared; 5420b57cec5SDimitry Andric if (FunctionTemplateSpecializationInfo *spec 5430b57cec5SDimitry Andric = FD->getTemplateSpecializationInfo()) { 5440b57cec5SDimitry Andric TSK = spec->getTemplateSpecializationKind(); 5450b57cec5SDimitry Andric } else if (MemberSpecializationInfo *MSI = 5460b57cec5SDimitry Andric FD->getMemberSpecializationInfo()) { 5470b57cec5SDimitry Andric TSK = MSI->getTemplateSpecializationKind(); 5480b57cec5SDimitry Andric } 5490b57cec5SDimitry Andric 5500b57cec5SDimitry Andric const FunctionDecl *Def = nullptr; 5510b57cec5SDimitry Andric // InlineVisibilityHidden only applies to definitions, and 5520b57cec5SDimitry Andric // isInlined() only gives meaningful answers on definitions 5530b57cec5SDimitry Andric // anyway. 5540b57cec5SDimitry Andric return TSK != TSK_ExplicitInstantiationDeclaration && 5550b57cec5SDimitry Andric TSK != TSK_ExplicitInstantiationDefinition && 5560b57cec5SDimitry Andric FD->hasBody(Def) && Def->isInlined() && !Def->hasAttr<GNUInlineAttr>(); 5570b57cec5SDimitry Andric } 5580b57cec5SDimitry Andric 5590b57cec5SDimitry Andric template <typename T> static bool isFirstInExternCContext(T *D) { 5600b57cec5SDimitry Andric const T *First = D->getFirstDecl(); 5610b57cec5SDimitry Andric return First->isInExternCContext(); 5620b57cec5SDimitry Andric } 5630b57cec5SDimitry Andric 5640b57cec5SDimitry Andric static bool isSingleLineLanguageLinkage(const Decl &D) { 5650b57cec5SDimitry Andric if (const auto *SD = dyn_cast<LinkageSpecDecl>(D.getDeclContext())) 5660b57cec5SDimitry Andric if (!SD->hasBraces()) 5670b57cec5SDimitry Andric return true; 5680b57cec5SDimitry Andric return false; 5690b57cec5SDimitry Andric } 5700b57cec5SDimitry Andric 5710b57cec5SDimitry Andric /// Determine whether D is declared in the purview of a named module. 5720b57cec5SDimitry Andric static bool isInModulePurview(const NamedDecl *D) { 5730b57cec5SDimitry Andric if (auto *M = D->getOwningModule()) 5740b57cec5SDimitry Andric return M->isModulePurview(); 5750b57cec5SDimitry Andric return false; 5760b57cec5SDimitry Andric } 5770b57cec5SDimitry Andric 5780b57cec5SDimitry Andric static bool isExportedFromModuleInterfaceUnit(const NamedDecl *D) { 5790b57cec5SDimitry Andric // FIXME: Handle isModulePrivate. 5800b57cec5SDimitry Andric switch (D->getModuleOwnershipKind()) { 5810b57cec5SDimitry Andric case Decl::ModuleOwnershipKind::Unowned: 5820b57cec5SDimitry Andric case Decl::ModuleOwnershipKind::ModulePrivate: 5830b57cec5SDimitry Andric return false; 5840b57cec5SDimitry Andric case Decl::ModuleOwnershipKind::Visible: 5850b57cec5SDimitry Andric case Decl::ModuleOwnershipKind::VisibleWhenImported: 5860b57cec5SDimitry Andric return isInModulePurview(D); 5870b57cec5SDimitry Andric } 5880b57cec5SDimitry Andric llvm_unreachable("unexpected module ownership kind"); 5890b57cec5SDimitry Andric } 5900b57cec5SDimitry Andric 5910b57cec5SDimitry Andric static LinkageInfo getInternalLinkageFor(const NamedDecl *D) { 5920b57cec5SDimitry Andric // Internal linkage declarations within a module interface unit are modeled 5930b57cec5SDimitry Andric // as "module-internal linkage", which means that they have internal linkage 5940b57cec5SDimitry Andric // formally but can be indirectly accessed from outside the module via inline 5950b57cec5SDimitry Andric // functions and templates defined within the module. 5960b57cec5SDimitry Andric if (isInModulePurview(D)) 5970b57cec5SDimitry Andric return LinkageInfo(ModuleInternalLinkage, DefaultVisibility, false); 5980b57cec5SDimitry Andric 5990b57cec5SDimitry Andric return LinkageInfo::internal(); 6000b57cec5SDimitry Andric } 6010b57cec5SDimitry Andric 6020b57cec5SDimitry Andric static LinkageInfo getExternalLinkageFor(const NamedDecl *D) { 6030b57cec5SDimitry Andric // C++ Modules TS [basic.link]/6.8: 6040b57cec5SDimitry Andric // - A name declared at namespace scope that does not have internal linkage 6050b57cec5SDimitry Andric // by the previous rules and that is introduced by a non-exported 6060b57cec5SDimitry Andric // declaration has module linkage. 6070b57cec5SDimitry Andric if (isInModulePurview(D) && !isExportedFromModuleInterfaceUnit( 6080b57cec5SDimitry Andric cast<NamedDecl>(D->getCanonicalDecl()))) 6090b57cec5SDimitry Andric return LinkageInfo(ModuleLinkage, DefaultVisibility, false); 6100b57cec5SDimitry Andric 6110b57cec5SDimitry Andric return LinkageInfo::external(); 6120b57cec5SDimitry Andric } 6130b57cec5SDimitry Andric 6140b57cec5SDimitry Andric static StorageClass getStorageClass(const Decl *D) { 6150b57cec5SDimitry Andric if (auto *TD = dyn_cast<TemplateDecl>(D)) 6160b57cec5SDimitry Andric D = TD->getTemplatedDecl(); 6170b57cec5SDimitry Andric if (D) { 6180b57cec5SDimitry Andric if (auto *VD = dyn_cast<VarDecl>(D)) 6190b57cec5SDimitry Andric return VD->getStorageClass(); 6200b57cec5SDimitry Andric if (auto *FD = dyn_cast<FunctionDecl>(D)) 6210b57cec5SDimitry Andric return FD->getStorageClass(); 6220b57cec5SDimitry Andric } 6230b57cec5SDimitry Andric return SC_None; 6240b57cec5SDimitry Andric } 6250b57cec5SDimitry Andric 6260b57cec5SDimitry Andric LinkageInfo 6270b57cec5SDimitry Andric LinkageComputer::getLVForNamespaceScopeDecl(const NamedDecl *D, 6280b57cec5SDimitry Andric LVComputationKind computation, 6290b57cec5SDimitry Andric bool IgnoreVarTypeLinkage) { 6300b57cec5SDimitry Andric assert(D->getDeclContext()->getRedeclContext()->isFileContext() && 6310b57cec5SDimitry Andric "Not a name having namespace scope"); 6320b57cec5SDimitry Andric ASTContext &Context = D->getASTContext(); 6330b57cec5SDimitry Andric 6340b57cec5SDimitry Andric // C++ [basic.link]p3: 6350b57cec5SDimitry Andric // A name having namespace scope (3.3.6) has internal linkage if it 6360b57cec5SDimitry Andric // is the name of 6370b57cec5SDimitry Andric 6380b57cec5SDimitry Andric if (getStorageClass(D->getCanonicalDecl()) == SC_Static) { 6390b57cec5SDimitry Andric // - a variable, variable template, function, or function template 6400b57cec5SDimitry Andric // that is explicitly declared static; or 6410b57cec5SDimitry Andric // (This bullet corresponds to C99 6.2.2p3.) 6420b57cec5SDimitry Andric return getInternalLinkageFor(D); 6430b57cec5SDimitry Andric } 6440b57cec5SDimitry Andric 6450b57cec5SDimitry Andric if (const auto *Var = dyn_cast<VarDecl>(D)) { 6460b57cec5SDimitry Andric // - a non-template variable of non-volatile const-qualified type, unless 6470b57cec5SDimitry Andric // - it is explicitly declared extern, or 6480b57cec5SDimitry Andric // - it is inline or exported, or 6490b57cec5SDimitry Andric // - it was previously declared and the prior declaration did not have 6500b57cec5SDimitry Andric // internal linkage 6510b57cec5SDimitry Andric // (There is no equivalent in C99.) 6520b57cec5SDimitry Andric if (Context.getLangOpts().CPlusPlus && 6530b57cec5SDimitry Andric Var->getType().isConstQualified() && 6540b57cec5SDimitry Andric !Var->getType().isVolatileQualified() && 6550b57cec5SDimitry Andric !Var->isInline() && 6560b57cec5SDimitry Andric !isExportedFromModuleInterfaceUnit(Var) && 6570b57cec5SDimitry Andric !isa<VarTemplateSpecializationDecl>(Var) && 6580b57cec5SDimitry Andric !Var->getDescribedVarTemplate()) { 6590b57cec5SDimitry Andric const VarDecl *PrevVar = Var->getPreviousDecl(); 6600b57cec5SDimitry Andric if (PrevVar) 6610b57cec5SDimitry Andric return getLVForDecl(PrevVar, computation); 6620b57cec5SDimitry Andric 6630b57cec5SDimitry Andric if (Var->getStorageClass() != SC_Extern && 6640b57cec5SDimitry Andric Var->getStorageClass() != SC_PrivateExtern && 6650b57cec5SDimitry Andric !isSingleLineLanguageLinkage(*Var)) 6660b57cec5SDimitry Andric return getInternalLinkageFor(Var); 6670b57cec5SDimitry Andric } 6680b57cec5SDimitry Andric 6690b57cec5SDimitry Andric for (const VarDecl *PrevVar = Var->getPreviousDecl(); PrevVar; 6700b57cec5SDimitry Andric PrevVar = PrevVar->getPreviousDecl()) { 6710b57cec5SDimitry Andric if (PrevVar->getStorageClass() == SC_PrivateExtern && 6720b57cec5SDimitry Andric Var->getStorageClass() == SC_None) 6730b57cec5SDimitry Andric return getDeclLinkageAndVisibility(PrevVar); 6740b57cec5SDimitry Andric // Explicitly declared static. 6750b57cec5SDimitry Andric if (PrevVar->getStorageClass() == SC_Static) 6760b57cec5SDimitry Andric return getInternalLinkageFor(Var); 6770b57cec5SDimitry Andric } 6780b57cec5SDimitry Andric } else if (const auto *IFD = dyn_cast<IndirectFieldDecl>(D)) { 6790b57cec5SDimitry Andric // - a data member of an anonymous union. 6800b57cec5SDimitry Andric const VarDecl *VD = IFD->getVarDecl(); 6810b57cec5SDimitry Andric assert(VD && "Expected a VarDecl in this IndirectFieldDecl!"); 6820b57cec5SDimitry Andric return getLVForNamespaceScopeDecl(VD, computation, IgnoreVarTypeLinkage); 6830b57cec5SDimitry Andric } 6840b57cec5SDimitry Andric assert(!isa<FieldDecl>(D) && "Didn't expect a FieldDecl!"); 6850b57cec5SDimitry Andric 6860b57cec5SDimitry Andric // FIXME: This gives internal linkage to names that should have no linkage 6870b57cec5SDimitry Andric // (those not covered by [basic.link]p6). 6880b57cec5SDimitry Andric if (D->isInAnonymousNamespace()) { 6890b57cec5SDimitry Andric const auto *Var = dyn_cast<VarDecl>(D); 6900b57cec5SDimitry Andric const auto *Func = dyn_cast<FunctionDecl>(D); 6910b57cec5SDimitry Andric // FIXME: The check for extern "C" here is not justified by the standard 6920b57cec5SDimitry Andric // wording, but we retain it from the pre-DR1113 model to avoid breaking 6930b57cec5SDimitry Andric // code. 6940b57cec5SDimitry Andric // 6950b57cec5SDimitry Andric // C++11 [basic.link]p4: 6960b57cec5SDimitry Andric // An unnamed namespace or a namespace declared directly or indirectly 6970b57cec5SDimitry Andric // within an unnamed namespace has internal linkage. 6980b57cec5SDimitry Andric if ((!Var || !isFirstInExternCContext(Var)) && 6990b57cec5SDimitry Andric (!Func || !isFirstInExternCContext(Func))) 7000b57cec5SDimitry Andric return getInternalLinkageFor(D); 7010b57cec5SDimitry Andric } 7020b57cec5SDimitry Andric 7030b57cec5SDimitry Andric // Set up the defaults. 7040b57cec5SDimitry Andric 7050b57cec5SDimitry Andric // C99 6.2.2p5: 7060b57cec5SDimitry Andric // If the declaration of an identifier for an object has file 7070b57cec5SDimitry Andric // scope and no storage-class specifier, its linkage is 7080b57cec5SDimitry Andric // external. 7090b57cec5SDimitry Andric LinkageInfo LV = getExternalLinkageFor(D); 7100b57cec5SDimitry Andric 7110b57cec5SDimitry Andric if (!hasExplicitVisibilityAlready(computation)) { 7120b57cec5SDimitry Andric if (Optional<Visibility> Vis = getExplicitVisibility(D, computation)) { 7130b57cec5SDimitry Andric LV.mergeVisibility(*Vis, true); 7140b57cec5SDimitry Andric } else { 7150b57cec5SDimitry Andric // If we're declared in a namespace with a visibility attribute, 7160b57cec5SDimitry Andric // use that namespace's visibility, and it still counts as explicit. 7170b57cec5SDimitry Andric for (const DeclContext *DC = D->getDeclContext(); 7180b57cec5SDimitry Andric !isa<TranslationUnitDecl>(DC); 7190b57cec5SDimitry Andric DC = DC->getParent()) { 7200b57cec5SDimitry Andric const auto *ND = dyn_cast<NamespaceDecl>(DC); 7210b57cec5SDimitry Andric if (!ND) continue; 7220b57cec5SDimitry Andric if (Optional<Visibility> Vis = getExplicitVisibility(ND, computation)) { 7230b57cec5SDimitry Andric LV.mergeVisibility(*Vis, true); 7240b57cec5SDimitry Andric break; 7250b57cec5SDimitry Andric } 7260b57cec5SDimitry Andric } 7270b57cec5SDimitry Andric } 7280b57cec5SDimitry Andric 7290b57cec5SDimitry Andric // Add in global settings if the above didn't give us direct visibility. 7300b57cec5SDimitry Andric if (!LV.isVisibilityExplicit()) { 7310b57cec5SDimitry Andric // Use global type/value visibility as appropriate. 7320b57cec5SDimitry Andric Visibility globalVisibility = 7330b57cec5SDimitry Andric computation.isValueVisibility() 7340b57cec5SDimitry Andric ? Context.getLangOpts().getValueVisibilityMode() 7350b57cec5SDimitry Andric : Context.getLangOpts().getTypeVisibilityMode(); 7360b57cec5SDimitry Andric LV.mergeVisibility(globalVisibility, /*explicit*/ false); 7370b57cec5SDimitry Andric 7380b57cec5SDimitry Andric // If we're paying attention to global visibility, apply 7390b57cec5SDimitry Andric // -finline-visibility-hidden if this is an inline method. 7400b57cec5SDimitry Andric if (useInlineVisibilityHidden(D)) 7410b57cec5SDimitry Andric LV.mergeVisibility(HiddenVisibility, /*visibilityExplicit=*/false); 7420b57cec5SDimitry Andric } 7430b57cec5SDimitry Andric } 7440b57cec5SDimitry Andric 7450b57cec5SDimitry Andric // C++ [basic.link]p4: 7460b57cec5SDimitry Andric 7470b57cec5SDimitry Andric // A name having namespace scope that has not been given internal linkage 7480b57cec5SDimitry Andric // above and that is the name of 7490b57cec5SDimitry Andric // [...bullets...] 7500b57cec5SDimitry Andric // has its linkage determined as follows: 7510b57cec5SDimitry Andric // - if the enclosing namespace has internal linkage, the name has 7520b57cec5SDimitry Andric // internal linkage; [handled above] 7530b57cec5SDimitry Andric // - otherwise, if the declaration of the name is attached to a named 7540b57cec5SDimitry Andric // module and is not exported, the name has module linkage; 7550b57cec5SDimitry Andric // - otherwise, the name has external linkage. 7560b57cec5SDimitry Andric // LV is currently set up to handle the last two bullets. 7570b57cec5SDimitry Andric // 7580b57cec5SDimitry Andric // The bullets are: 7590b57cec5SDimitry Andric 7600b57cec5SDimitry Andric // - a variable; or 7610b57cec5SDimitry Andric if (const auto *Var = dyn_cast<VarDecl>(D)) { 7620b57cec5SDimitry Andric // GCC applies the following optimization to variables and static 7630b57cec5SDimitry Andric // data members, but not to functions: 7640b57cec5SDimitry Andric // 7650b57cec5SDimitry Andric // Modify the variable's LV by the LV of its type unless this is 7660b57cec5SDimitry Andric // C or extern "C". This follows from [basic.link]p9: 7670b57cec5SDimitry Andric // A type without linkage shall not be used as the type of a 7680b57cec5SDimitry Andric // variable or function with external linkage unless 7690b57cec5SDimitry Andric // - the entity has C language linkage, or 7700b57cec5SDimitry Andric // - the entity is declared within an unnamed namespace, or 7710b57cec5SDimitry Andric // - the entity is not used or is defined in the same 7720b57cec5SDimitry Andric // translation unit. 7730b57cec5SDimitry Andric // and [basic.link]p10: 7740b57cec5SDimitry Andric // ...the types specified by all declarations referring to a 7750b57cec5SDimitry Andric // given variable or function shall be identical... 7760b57cec5SDimitry Andric // C does not have an equivalent rule. 7770b57cec5SDimitry Andric // 7780b57cec5SDimitry Andric // Ignore this if we've got an explicit attribute; the user 7790b57cec5SDimitry Andric // probably knows what they're doing. 7800b57cec5SDimitry Andric // 7810b57cec5SDimitry Andric // Note that we don't want to make the variable non-external 7820b57cec5SDimitry Andric // because of this, but unique-external linkage suits us. 7830b57cec5SDimitry Andric if (Context.getLangOpts().CPlusPlus && !isFirstInExternCContext(Var) && 7840b57cec5SDimitry Andric !IgnoreVarTypeLinkage) { 7850b57cec5SDimitry Andric LinkageInfo TypeLV = getLVForType(*Var->getType(), computation); 7860b57cec5SDimitry Andric if (!isExternallyVisible(TypeLV.getLinkage())) 7870b57cec5SDimitry Andric return LinkageInfo::uniqueExternal(); 7880b57cec5SDimitry Andric if (!LV.isVisibilityExplicit()) 7890b57cec5SDimitry Andric LV.mergeVisibility(TypeLV); 7900b57cec5SDimitry Andric } 7910b57cec5SDimitry Andric 7920b57cec5SDimitry Andric if (Var->getStorageClass() == SC_PrivateExtern) 7930b57cec5SDimitry Andric LV.mergeVisibility(HiddenVisibility, true); 7940b57cec5SDimitry Andric 7950b57cec5SDimitry Andric // Note that Sema::MergeVarDecl already takes care of implementing 7960b57cec5SDimitry Andric // C99 6.2.2p4 and propagating the visibility attribute, so we don't have 7970b57cec5SDimitry Andric // to do it here. 7980b57cec5SDimitry Andric 7990b57cec5SDimitry Andric // As per function and class template specializations (below), 8000b57cec5SDimitry Andric // consider LV for the template and template arguments. We're at file 8010b57cec5SDimitry Andric // scope, so we do not need to worry about nested specializations. 8020b57cec5SDimitry Andric if (const auto *spec = dyn_cast<VarTemplateSpecializationDecl>(Var)) { 8030b57cec5SDimitry Andric mergeTemplateLV(LV, spec, computation); 8040b57cec5SDimitry Andric } 8050b57cec5SDimitry Andric 8060b57cec5SDimitry Andric // - a function; or 8070b57cec5SDimitry Andric } else if (const auto *Function = dyn_cast<FunctionDecl>(D)) { 8080b57cec5SDimitry Andric // In theory, we can modify the function's LV by the LV of its 8090b57cec5SDimitry Andric // type unless it has C linkage (see comment above about variables 8100b57cec5SDimitry Andric // for justification). In practice, GCC doesn't do this, so it's 8110b57cec5SDimitry Andric // just too painful to make work. 8120b57cec5SDimitry Andric 8130b57cec5SDimitry Andric if (Function->getStorageClass() == SC_PrivateExtern) 8140b57cec5SDimitry Andric LV.mergeVisibility(HiddenVisibility, true); 8150b57cec5SDimitry Andric 8160b57cec5SDimitry Andric // Note that Sema::MergeCompatibleFunctionDecls already takes care of 8170b57cec5SDimitry Andric // merging storage classes and visibility attributes, so we don't have to 8180b57cec5SDimitry Andric // look at previous decls in here. 8190b57cec5SDimitry Andric 8200b57cec5SDimitry Andric // In C++, then if the type of the function uses a type with 8210b57cec5SDimitry Andric // unique-external linkage, it's not legally usable from outside 8220b57cec5SDimitry Andric // this translation unit. However, we should use the C linkage 8230b57cec5SDimitry Andric // rules instead for extern "C" declarations. 8240b57cec5SDimitry Andric if (Context.getLangOpts().CPlusPlus && !isFirstInExternCContext(Function)) { 8250b57cec5SDimitry Andric // Only look at the type-as-written. Otherwise, deducing the return type 8260b57cec5SDimitry Andric // of a function could change its linkage. 8270b57cec5SDimitry Andric QualType TypeAsWritten = Function->getType(); 8280b57cec5SDimitry Andric if (TypeSourceInfo *TSI = Function->getTypeSourceInfo()) 8290b57cec5SDimitry Andric TypeAsWritten = TSI->getType(); 8300b57cec5SDimitry Andric if (!isExternallyVisible(TypeAsWritten->getLinkage())) 8310b57cec5SDimitry Andric return LinkageInfo::uniqueExternal(); 8320b57cec5SDimitry Andric } 8330b57cec5SDimitry Andric 8340b57cec5SDimitry Andric // Consider LV from the template and the template arguments. 8350b57cec5SDimitry Andric // We're at file scope, so we do not need to worry about nested 8360b57cec5SDimitry Andric // specializations. 8370b57cec5SDimitry Andric if (FunctionTemplateSpecializationInfo *specInfo 8380b57cec5SDimitry Andric = Function->getTemplateSpecializationInfo()) { 8390b57cec5SDimitry Andric mergeTemplateLV(LV, Function, specInfo, computation); 8400b57cec5SDimitry Andric } 8410b57cec5SDimitry Andric 8420b57cec5SDimitry Andric // - a named class (Clause 9), or an unnamed class defined in a 8430b57cec5SDimitry Andric // typedef declaration in which the class has the typedef name 8440b57cec5SDimitry Andric // for linkage purposes (7.1.3); or 8450b57cec5SDimitry Andric // - a named enumeration (7.2), or an unnamed enumeration 8460b57cec5SDimitry Andric // defined in a typedef declaration in which the enumeration 8470b57cec5SDimitry Andric // has the typedef name for linkage purposes (7.1.3); or 8480b57cec5SDimitry Andric } else if (const auto *Tag = dyn_cast<TagDecl>(D)) { 8490b57cec5SDimitry Andric // Unnamed tags have no linkage. 8500b57cec5SDimitry Andric if (!Tag->hasNameForLinkage()) 8510b57cec5SDimitry Andric return LinkageInfo::none(); 8520b57cec5SDimitry Andric 8530b57cec5SDimitry Andric // If this is a class template specialization, consider the 8540b57cec5SDimitry Andric // linkage of the template and template arguments. We're at file 8550b57cec5SDimitry Andric // scope, so we do not need to worry about nested specializations. 8560b57cec5SDimitry Andric if (const auto *spec = dyn_cast<ClassTemplateSpecializationDecl>(Tag)) { 8570b57cec5SDimitry Andric mergeTemplateLV(LV, spec, computation); 8580b57cec5SDimitry Andric } 8590b57cec5SDimitry Andric 8600b57cec5SDimitry Andric // FIXME: This is not part of the C++ standard any more. 8610b57cec5SDimitry Andric // - an enumerator belonging to an enumeration with external linkage; or 8620b57cec5SDimitry Andric } else if (isa<EnumConstantDecl>(D)) { 8630b57cec5SDimitry Andric LinkageInfo EnumLV = getLVForDecl(cast<NamedDecl>(D->getDeclContext()), 8640b57cec5SDimitry Andric computation); 8650b57cec5SDimitry Andric if (!isExternalFormalLinkage(EnumLV.getLinkage())) 8660b57cec5SDimitry Andric return LinkageInfo::none(); 8670b57cec5SDimitry Andric LV.merge(EnumLV); 8680b57cec5SDimitry Andric 8690b57cec5SDimitry Andric // - a template 8700b57cec5SDimitry Andric } else if (const auto *temp = dyn_cast<TemplateDecl>(D)) { 8710b57cec5SDimitry Andric bool considerVisibility = !hasExplicitVisibilityAlready(computation); 8720b57cec5SDimitry Andric LinkageInfo tempLV = 8730b57cec5SDimitry Andric getLVForTemplateParameterList(temp->getTemplateParameters(), computation); 8740b57cec5SDimitry Andric LV.mergeMaybeWithVisibility(tempLV, considerVisibility); 8750b57cec5SDimitry Andric 8760b57cec5SDimitry Andric // An unnamed namespace or a namespace declared directly or indirectly 8770b57cec5SDimitry Andric // within an unnamed namespace has internal linkage. All other namespaces 8780b57cec5SDimitry Andric // have external linkage. 8790b57cec5SDimitry Andric // 8800b57cec5SDimitry Andric // We handled names in anonymous namespaces above. 8810b57cec5SDimitry Andric } else if (isa<NamespaceDecl>(D)) { 8820b57cec5SDimitry Andric return LV; 8830b57cec5SDimitry Andric 8840b57cec5SDimitry Andric // By extension, we assign external linkage to Objective-C 8850b57cec5SDimitry Andric // interfaces. 8860b57cec5SDimitry Andric } else if (isa<ObjCInterfaceDecl>(D)) { 8870b57cec5SDimitry Andric // fallout 8880b57cec5SDimitry Andric 8890b57cec5SDimitry Andric } else if (auto *TD = dyn_cast<TypedefNameDecl>(D)) { 8900b57cec5SDimitry Andric // A typedef declaration has linkage if it gives a type a name for 8910b57cec5SDimitry Andric // linkage purposes. 8920b57cec5SDimitry Andric if (!TD->getAnonDeclWithTypedefName(/*AnyRedecl*/true)) 8930b57cec5SDimitry Andric return LinkageInfo::none(); 8940b57cec5SDimitry Andric 8955ffd83dbSDimitry Andric } else if (isa<MSGuidDecl>(D)) { 8965ffd83dbSDimitry Andric // A GUID behaves like an inline variable with external linkage. Fall 8975ffd83dbSDimitry Andric // through. 8985ffd83dbSDimitry Andric 8990b57cec5SDimitry Andric // Everything not covered here has no linkage. 9000b57cec5SDimitry Andric } else { 9010b57cec5SDimitry Andric return LinkageInfo::none(); 9020b57cec5SDimitry Andric } 9030b57cec5SDimitry Andric 9040b57cec5SDimitry Andric // If we ended up with non-externally-visible linkage, visibility should 9050b57cec5SDimitry Andric // always be default. 9060b57cec5SDimitry Andric if (!isExternallyVisible(LV.getLinkage())) 9070b57cec5SDimitry Andric return LinkageInfo(LV.getLinkage(), DefaultVisibility, false); 9080b57cec5SDimitry Andric 909480093f4SDimitry Andric // Mark the symbols as hidden when compiling for the device. 910480093f4SDimitry Andric if (Context.getLangOpts().OpenMP && Context.getLangOpts().OpenMPIsDevice) 911480093f4SDimitry Andric LV.mergeVisibility(HiddenVisibility, /*newExplicit=*/false); 912480093f4SDimitry Andric 9130b57cec5SDimitry Andric return LV; 9140b57cec5SDimitry Andric } 9150b57cec5SDimitry Andric 9160b57cec5SDimitry Andric LinkageInfo 9170b57cec5SDimitry Andric LinkageComputer::getLVForClassMember(const NamedDecl *D, 9180b57cec5SDimitry Andric LVComputationKind computation, 9190b57cec5SDimitry Andric bool IgnoreVarTypeLinkage) { 9200b57cec5SDimitry Andric // Only certain class members have linkage. Note that fields don't 9210b57cec5SDimitry Andric // really have linkage, but it's convenient to say they do for the 9220b57cec5SDimitry Andric // purposes of calculating linkage of pointer-to-data-member 9230b57cec5SDimitry Andric // template arguments. 9240b57cec5SDimitry Andric // 9250b57cec5SDimitry Andric // Templates also don't officially have linkage, but since we ignore 9260b57cec5SDimitry Andric // the C++ standard and look at template arguments when determining 9270b57cec5SDimitry Andric // linkage and visibility of a template specialization, we might hit 9280b57cec5SDimitry Andric // a template template argument that way. If we do, we need to 9290b57cec5SDimitry Andric // consider its linkage. 9300b57cec5SDimitry Andric if (!(isa<CXXMethodDecl>(D) || 9310b57cec5SDimitry Andric isa<VarDecl>(D) || 9320b57cec5SDimitry Andric isa<FieldDecl>(D) || 9330b57cec5SDimitry Andric isa<IndirectFieldDecl>(D) || 9340b57cec5SDimitry Andric isa<TagDecl>(D) || 9350b57cec5SDimitry Andric isa<TemplateDecl>(D))) 9360b57cec5SDimitry Andric return LinkageInfo::none(); 9370b57cec5SDimitry Andric 9380b57cec5SDimitry Andric LinkageInfo LV; 9390b57cec5SDimitry Andric 9400b57cec5SDimitry Andric // If we have an explicit visibility attribute, merge that in. 9410b57cec5SDimitry Andric if (!hasExplicitVisibilityAlready(computation)) { 9420b57cec5SDimitry Andric if (Optional<Visibility> Vis = getExplicitVisibility(D, computation)) 9430b57cec5SDimitry Andric LV.mergeVisibility(*Vis, true); 9440b57cec5SDimitry Andric // If we're paying attention to global visibility, apply 9450b57cec5SDimitry Andric // -finline-visibility-hidden if this is an inline method. 9460b57cec5SDimitry Andric // 9470b57cec5SDimitry Andric // Note that we do this before merging information about 9480b57cec5SDimitry Andric // the class visibility. 9490b57cec5SDimitry Andric if (!LV.isVisibilityExplicit() && useInlineVisibilityHidden(D)) 9500b57cec5SDimitry Andric LV.mergeVisibility(HiddenVisibility, /*visibilityExplicit=*/false); 9510b57cec5SDimitry Andric } 9520b57cec5SDimitry Andric 9530b57cec5SDimitry Andric // If this class member has an explicit visibility attribute, the only 9540b57cec5SDimitry Andric // thing that can change its visibility is the template arguments, so 9550b57cec5SDimitry Andric // only look for them when processing the class. 9560b57cec5SDimitry Andric LVComputationKind classComputation = computation; 9570b57cec5SDimitry Andric if (LV.isVisibilityExplicit()) 9580b57cec5SDimitry Andric classComputation = withExplicitVisibilityAlready(computation); 9590b57cec5SDimitry Andric 9600b57cec5SDimitry Andric LinkageInfo classLV = 9610b57cec5SDimitry Andric getLVForDecl(cast<RecordDecl>(D->getDeclContext()), classComputation); 9620b57cec5SDimitry Andric // The member has the same linkage as the class. If that's not externally 9630b57cec5SDimitry Andric // visible, we don't need to compute anything about the linkage. 9640b57cec5SDimitry Andric // FIXME: If we're only computing linkage, can we bail out here? 9650b57cec5SDimitry Andric if (!isExternallyVisible(classLV.getLinkage())) 9660b57cec5SDimitry Andric return classLV; 9670b57cec5SDimitry Andric 9680b57cec5SDimitry Andric 9690b57cec5SDimitry Andric // Otherwise, don't merge in classLV yet, because in certain cases 9700b57cec5SDimitry Andric // we need to completely ignore the visibility from it. 9710b57cec5SDimitry Andric 9720b57cec5SDimitry Andric // Specifically, if this decl exists and has an explicit attribute. 9730b57cec5SDimitry Andric const NamedDecl *explicitSpecSuppressor = nullptr; 9740b57cec5SDimitry Andric 9750b57cec5SDimitry Andric if (const auto *MD = dyn_cast<CXXMethodDecl>(D)) { 9760b57cec5SDimitry Andric // Only look at the type-as-written. Otherwise, deducing the return type 9770b57cec5SDimitry Andric // of a function could change its linkage. 9780b57cec5SDimitry Andric QualType TypeAsWritten = MD->getType(); 9790b57cec5SDimitry Andric if (TypeSourceInfo *TSI = MD->getTypeSourceInfo()) 9800b57cec5SDimitry Andric TypeAsWritten = TSI->getType(); 9810b57cec5SDimitry Andric if (!isExternallyVisible(TypeAsWritten->getLinkage())) 9820b57cec5SDimitry Andric return LinkageInfo::uniqueExternal(); 9830b57cec5SDimitry Andric 9840b57cec5SDimitry Andric // If this is a method template specialization, use the linkage for 9850b57cec5SDimitry Andric // the template parameters and arguments. 9860b57cec5SDimitry Andric if (FunctionTemplateSpecializationInfo *spec 9870b57cec5SDimitry Andric = MD->getTemplateSpecializationInfo()) { 9880b57cec5SDimitry Andric mergeTemplateLV(LV, MD, spec, computation); 9890b57cec5SDimitry Andric if (spec->isExplicitSpecialization()) { 9900b57cec5SDimitry Andric explicitSpecSuppressor = MD; 9910b57cec5SDimitry Andric } else if (isExplicitMemberSpecialization(spec->getTemplate())) { 9920b57cec5SDimitry Andric explicitSpecSuppressor = spec->getTemplate()->getTemplatedDecl(); 9930b57cec5SDimitry Andric } 9940b57cec5SDimitry Andric } else if (isExplicitMemberSpecialization(MD)) { 9950b57cec5SDimitry Andric explicitSpecSuppressor = MD; 9960b57cec5SDimitry Andric } 9970b57cec5SDimitry Andric 9980b57cec5SDimitry Andric } else if (const auto *RD = dyn_cast<CXXRecordDecl>(D)) { 9990b57cec5SDimitry Andric if (const auto *spec = dyn_cast<ClassTemplateSpecializationDecl>(RD)) { 10000b57cec5SDimitry Andric mergeTemplateLV(LV, spec, computation); 10010b57cec5SDimitry Andric if (spec->isExplicitSpecialization()) { 10020b57cec5SDimitry Andric explicitSpecSuppressor = spec; 10030b57cec5SDimitry Andric } else { 10040b57cec5SDimitry Andric const ClassTemplateDecl *temp = spec->getSpecializedTemplate(); 10050b57cec5SDimitry Andric if (isExplicitMemberSpecialization(temp)) { 10060b57cec5SDimitry Andric explicitSpecSuppressor = temp->getTemplatedDecl(); 10070b57cec5SDimitry Andric } 10080b57cec5SDimitry Andric } 10090b57cec5SDimitry Andric } else if (isExplicitMemberSpecialization(RD)) { 10100b57cec5SDimitry Andric explicitSpecSuppressor = RD; 10110b57cec5SDimitry Andric } 10120b57cec5SDimitry Andric 10130b57cec5SDimitry Andric // Static data members. 10140b57cec5SDimitry Andric } else if (const auto *VD = dyn_cast<VarDecl>(D)) { 10150b57cec5SDimitry Andric if (const auto *spec = dyn_cast<VarTemplateSpecializationDecl>(VD)) 10160b57cec5SDimitry Andric mergeTemplateLV(LV, spec, computation); 10170b57cec5SDimitry Andric 10180b57cec5SDimitry Andric // Modify the variable's linkage by its type, but ignore the 10190b57cec5SDimitry Andric // type's visibility unless it's a definition. 10200b57cec5SDimitry Andric if (!IgnoreVarTypeLinkage) { 10210b57cec5SDimitry Andric LinkageInfo typeLV = getLVForType(*VD->getType(), computation); 10220b57cec5SDimitry Andric // FIXME: If the type's linkage is not externally visible, we can 10230b57cec5SDimitry Andric // give this static data member UniqueExternalLinkage. 10240b57cec5SDimitry Andric if (!LV.isVisibilityExplicit() && !classLV.isVisibilityExplicit()) 10250b57cec5SDimitry Andric LV.mergeVisibility(typeLV); 10260b57cec5SDimitry Andric LV.mergeExternalVisibility(typeLV); 10270b57cec5SDimitry Andric } 10280b57cec5SDimitry Andric 10290b57cec5SDimitry Andric if (isExplicitMemberSpecialization(VD)) { 10300b57cec5SDimitry Andric explicitSpecSuppressor = VD; 10310b57cec5SDimitry Andric } 10320b57cec5SDimitry Andric 10330b57cec5SDimitry Andric // Template members. 10340b57cec5SDimitry Andric } else if (const auto *temp = dyn_cast<TemplateDecl>(D)) { 10350b57cec5SDimitry Andric bool considerVisibility = 10360b57cec5SDimitry Andric (!LV.isVisibilityExplicit() && 10370b57cec5SDimitry Andric !classLV.isVisibilityExplicit() && 10380b57cec5SDimitry Andric !hasExplicitVisibilityAlready(computation)); 10390b57cec5SDimitry Andric LinkageInfo tempLV = 10400b57cec5SDimitry Andric getLVForTemplateParameterList(temp->getTemplateParameters(), computation); 10410b57cec5SDimitry Andric LV.mergeMaybeWithVisibility(tempLV, considerVisibility); 10420b57cec5SDimitry Andric 10430b57cec5SDimitry Andric if (const auto *redeclTemp = dyn_cast<RedeclarableTemplateDecl>(temp)) { 10440b57cec5SDimitry Andric if (isExplicitMemberSpecialization(redeclTemp)) { 10450b57cec5SDimitry Andric explicitSpecSuppressor = temp->getTemplatedDecl(); 10460b57cec5SDimitry Andric } 10470b57cec5SDimitry Andric } 10480b57cec5SDimitry Andric } 10490b57cec5SDimitry Andric 10500b57cec5SDimitry Andric // We should never be looking for an attribute directly on a template. 10510b57cec5SDimitry Andric assert(!explicitSpecSuppressor || !isa<TemplateDecl>(explicitSpecSuppressor)); 10520b57cec5SDimitry Andric 10530b57cec5SDimitry Andric // If this member is an explicit member specialization, and it has 10540b57cec5SDimitry Andric // an explicit attribute, ignore visibility from the parent. 10550b57cec5SDimitry Andric bool considerClassVisibility = true; 10560b57cec5SDimitry Andric if (explicitSpecSuppressor && 10570b57cec5SDimitry Andric // optimization: hasDVA() is true only with explicit visibility. 10580b57cec5SDimitry Andric LV.isVisibilityExplicit() && 10590b57cec5SDimitry Andric classLV.getVisibility() != DefaultVisibility && 10600b57cec5SDimitry Andric hasDirectVisibilityAttribute(explicitSpecSuppressor, computation)) { 10610b57cec5SDimitry Andric considerClassVisibility = false; 10620b57cec5SDimitry Andric } 10630b57cec5SDimitry Andric 10640b57cec5SDimitry Andric // Finally, merge in information from the class. 10650b57cec5SDimitry Andric LV.mergeMaybeWithVisibility(classLV, considerClassVisibility); 10660b57cec5SDimitry Andric return LV; 10670b57cec5SDimitry Andric } 10680b57cec5SDimitry Andric 10690b57cec5SDimitry Andric void NamedDecl::anchor() {} 10700b57cec5SDimitry Andric 10710b57cec5SDimitry Andric bool NamedDecl::isLinkageValid() const { 10720b57cec5SDimitry Andric if (!hasCachedLinkage()) 10730b57cec5SDimitry Andric return true; 10740b57cec5SDimitry Andric 10750b57cec5SDimitry Andric Linkage L = LinkageComputer{} 10760b57cec5SDimitry Andric .computeLVForDecl(this, LVComputationKind::forLinkageOnly()) 10770b57cec5SDimitry Andric .getLinkage(); 10780b57cec5SDimitry Andric return L == getCachedLinkage(); 10790b57cec5SDimitry Andric } 10800b57cec5SDimitry Andric 10810b57cec5SDimitry Andric ObjCStringFormatFamily NamedDecl::getObjCFStringFormattingFamily() const { 10820b57cec5SDimitry Andric StringRef name = getName(); 10830b57cec5SDimitry Andric if (name.empty()) return SFF_None; 10840b57cec5SDimitry Andric 10850b57cec5SDimitry Andric if (name.front() == 'C') 10860b57cec5SDimitry Andric if (name == "CFStringCreateWithFormat" || 10870b57cec5SDimitry Andric name == "CFStringCreateWithFormatAndArguments" || 10880b57cec5SDimitry Andric name == "CFStringAppendFormat" || 10890b57cec5SDimitry Andric name == "CFStringAppendFormatAndArguments") 10900b57cec5SDimitry Andric return SFF_CFString; 10910b57cec5SDimitry Andric return SFF_None; 10920b57cec5SDimitry Andric } 10930b57cec5SDimitry Andric 10940b57cec5SDimitry Andric Linkage NamedDecl::getLinkageInternal() const { 10950b57cec5SDimitry Andric // We don't care about visibility here, so ask for the cheapest 10960b57cec5SDimitry Andric // possible visibility analysis. 10970b57cec5SDimitry Andric return LinkageComputer{} 10980b57cec5SDimitry Andric .getLVForDecl(this, LVComputationKind::forLinkageOnly()) 10990b57cec5SDimitry Andric .getLinkage(); 11000b57cec5SDimitry Andric } 11010b57cec5SDimitry Andric 11020b57cec5SDimitry Andric LinkageInfo NamedDecl::getLinkageAndVisibility() const { 11030b57cec5SDimitry Andric return LinkageComputer{}.getDeclLinkageAndVisibility(this); 11040b57cec5SDimitry Andric } 11050b57cec5SDimitry Andric 11060b57cec5SDimitry Andric static Optional<Visibility> 11070b57cec5SDimitry Andric getExplicitVisibilityAux(const NamedDecl *ND, 11080b57cec5SDimitry Andric NamedDecl::ExplicitVisibilityKind kind, 11090b57cec5SDimitry Andric bool IsMostRecent) { 11100b57cec5SDimitry Andric assert(!IsMostRecent || ND == ND->getMostRecentDecl()); 11110b57cec5SDimitry Andric 11120b57cec5SDimitry Andric // Check the declaration itself first. 11130b57cec5SDimitry Andric if (Optional<Visibility> V = getVisibilityOf(ND, kind)) 11140b57cec5SDimitry Andric return V; 11150b57cec5SDimitry Andric 11160b57cec5SDimitry Andric // If this is a member class of a specialization of a class template 11170b57cec5SDimitry Andric // and the corresponding decl has explicit visibility, use that. 11180b57cec5SDimitry Andric if (const auto *RD = dyn_cast<CXXRecordDecl>(ND)) { 11190b57cec5SDimitry Andric CXXRecordDecl *InstantiatedFrom = RD->getInstantiatedFromMemberClass(); 11200b57cec5SDimitry Andric if (InstantiatedFrom) 11210b57cec5SDimitry Andric return getVisibilityOf(InstantiatedFrom, kind); 11220b57cec5SDimitry Andric } 11230b57cec5SDimitry Andric 11240b57cec5SDimitry Andric // If there wasn't explicit visibility there, and this is a 11250b57cec5SDimitry Andric // specialization of a class template, check for visibility 11260b57cec5SDimitry Andric // on the pattern. 11270b57cec5SDimitry Andric if (const auto *spec = dyn_cast<ClassTemplateSpecializationDecl>(ND)) { 11280b57cec5SDimitry Andric // Walk all the template decl till this point to see if there are 11290b57cec5SDimitry Andric // explicit visibility attributes. 11300b57cec5SDimitry Andric const auto *TD = spec->getSpecializedTemplate()->getTemplatedDecl(); 11310b57cec5SDimitry Andric while (TD != nullptr) { 11320b57cec5SDimitry Andric auto Vis = getVisibilityOf(TD, kind); 11330b57cec5SDimitry Andric if (Vis != None) 11340b57cec5SDimitry Andric return Vis; 11350b57cec5SDimitry Andric TD = TD->getPreviousDecl(); 11360b57cec5SDimitry Andric } 11370b57cec5SDimitry Andric return None; 11380b57cec5SDimitry Andric } 11390b57cec5SDimitry Andric 11400b57cec5SDimitry Andric // Use the most recent declaration. 11410b57cec5SDimitry Andric if (!IsMostRecent && !isa<NamespaceDecl>(ND)) { 11420b57cec5SDimitry Andric const NamedDecl *MostRecent = ND->getMostRecentDecl(); 11430b57cec5SDimitry Andric if (MostRecent != ND) 11440b57cec5SDimitry Andric return getExplicitVisibilityAux(MostRecent, kind, true); 11450b57cec5SDimitry Andric } 11460b57cec5SDimitry Andric 11470b57cec5SDimitry Andric if (const auto *Var = dyn_cast<VarDecl>(ND)) { 11480b57cec5SDimitry Andric if (Var->isStaticDataMember()) { 11490b57cec5SDimitry Andric VarDecl *InstantiatedFrom = Var->getInstantiatedFromStaticDataMember(); 11500b57cec5SDimitry Andric if (InstantiatedFrom) 11510b57cec5SDimitry Andric return getVisibilityOf(InstantiatedFrom, kind); 11520b57cec5SDimitry Andric } 11530b57cec5SDimitry Andric 11540b57cec5SDimitry Andric if (const auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(Var)) 11550b57cec5SDimitry Andric return getVisibilityOf(VTSD->getSpecializedTemplate()->getTemplatedDecl(), 11560b57cec5SDimitry Andric kind); 11570b57cec5SDimitry Andric 11580b57cec5SDimitry Andric return None; 11590b57cec5SDimitry Andric } 11600b57cec5SDimitry Andric // Also handle function template specializations. 11610b57cec5SDimitry Andric if (const auto *fn = dyn_cast<FunctionDecl>(ND)) { 11620b57cec5SDimitry Andric // If the function is a specialization of a template with an 11630b57cec5SDimitry Andric // explicit visibility attribute, use that. 11640b57cec5SDimitry Andric if (FunctionTemplateSpecializationInfo *templateInfo 11650b57cec5SDimitry Andric = fn->getTemplateSpecializationInfo()) 11660b57cec5SDimitry Andric return getVisibilityOf(templateInfo->getTemplate()->getTemplatedDecl(), 11670b57cec5SDimitry Andric kind); 11680b57cec5SDimitry Andric 11690b57cec5SDimitry Andric // If the function is a member of a specialization of a class template 11700b57cec5SDimitry Andric // and the corresponding decl has explicit visibility, use that. 11710b57cec5SDimitry Andric FunctionDecl *InstantiatedFrom = fn->getInstantiatedFromMemberFunction(); 11720b57cec5SDimitry Andric if (InstantiatedFrom) 11730b57cec5SDimitry Andric return getVisibilityOf(InstantiatedFrom, kind); 11740b57cec5SDimitry Andric 11750b57cec5SDimitry Andric return None; 11760b57cec5SDimitry Andric } 11770b57cec5SDimitry Andric 11780b57cec5SDimitry Andric // The visibility of a template is stored in the templated decl. 11790b57cec5SDimitry Andric if (const auto *TD = dyn_cast<TemplateDecl>(ND)) 11800b57cec5SDimitry Andric return getVisibilityOf(TD->getTemplatedDecl(), kind); 11810b57cec5SDimitry Andric 11820b57cec5SDimitry Andric return None; 11830b57cec5SDimitry Andric } 11840b57cec5SDimitry Andric 11850b57cec5SDimitry Andric Optional<Visibility> 11860b57cec5SDimitry Andric NamedDecl::getExplicitVisibility(ExplicitVisibilityKind kind) const { 11870b57cec5SDimitry Andric return getExplicitVisibilityAux(this, kind, false); 11880b57cec5SDimitry Andric } 11890b57cec5SDimitry Andric 11900b57cec5SDimitry Andric LinkageInfo LinkageComputer::getLVForClosure(const DeclContext *DC, 11910b57cec5SDimitry Andric Decl *ContextDecl, 11920b57cec5SDimitry Andric LVComputationKind computation) { 11930b57cec5SDimitry Andric // This lambda has its linkage/visibility determined by its owner. 11940b57cec5SDimitry Andric const NamedDecl *Owner; 11950b57cec5SDimitry Andric if (!ContextDecl) 11960b57cec5SDimitry Andric Owner = dyn_cast<NamedDecl>(DC); 11970b57cec5SDimitry Andric else if (isa<ParmVarDecl>(ContextDecl)) 11980b57cec5SDimitry Andric Owner = 11990b57cec5SDimitry Andric dyn_cast<NamedDecl>(ContextDecl->getDeclContext()->getRedeclContext()); 12000b57cec5SDimitry Andric else 12010b57cec5SDimitry Andric Owner = cast<NamedDecl>(ContextDecl); 12020b57cec5SDimitry Andric 12030b57cec5SDimitry Andric if (!Owner) 12040b57cec5SDimitry Andric return LinkageInfo::none(); 12050b57cec5SDimitry Andric 12060b57cec5SDimitry Andric // If the owner has a deduced type, we need to skip querying the linkage and 12070b57cec5SDimitry Andric // visibility of that type, because it might involve this closure type. The 12080b57cec5SDimitry Andric // only effect of this is that we might give a lambda VisibleNoLinkage rather 12090b57cec5SDimitry Andric // than NoLinkage when we don't strictly need to, which is benign. 12100b57cec5SDimitry Andric auto *VD = dyn_cast<VarDecl>(Owner); 12110b57cec5SDimitry Andric LinkageInfo OwnerLV = 12120b57cec5SDimitry Andric VD && VD->getType()->getContainedDeducedType() 12130b57cec5SDimitry Andric ? computeLVForDecl(Owner, computation, /*IgnoreVarTypeLinkage*/true) 12140b57cec5SDimitry Andric : getLVForDecl(Owner, computation); 12150b57cec5SDimitry Andric 12160b57cec5SDimitry Andric // A lambda never formally has linkage. But if the owner is externally 12170b57cec5SDimitry Andric // visible, then the lambda is too. We apply the same rules to blocks. 12180b57cec5SDimitry Andric if (!isExternallyVisible(OwnerLV.getLinkage())) 12190b57cec5SDimitry Andric return LinkageInfo::none(); 12200b57cec5SDimitry Andric return LinkageInfo(VisibleNoLinkage, OwnerLV.getVisibility(), 12210b57cec5SDimitry Andric OwnerLV.isVisibilityExplicit()); 12220b57cec5SDimitry Andric } 12230b57cec5SDimitry Andric 12240b57cec5SDimitry Andric LinkageInfo LinkageComputer::getLVForLocalDecl(const NamedDecl *D, 12250b57cec5SDimitry Andric LVComputationKind computation) { 12260b57cec5SDimitry Andric if (const auto *Function = dyn_cast<FunctionDecl>(D)) { 12270b57cec5SDimitry Andric if (Function->isInAnonymousNamespace() && 12280b57cec5SDimitry Andric !isFirstInExternCContext(Function)) 12290b57cec5SDimitry Andric return getInternalLinkageFor(Function); 12300b57cec5SDimitry Andric 12310b57cec5SDimitry Andric // This is a "void f();" which got merged with a file static. 12320b57cec5SDimitry Andric if (Function->getCanonicalDecl()->getStorageClass() == SC_Static) 12330b57cec5SDimitry Andric return getInternalLinkageFor(Function); 12340b57cec5SDimitry Andric 12350b57cec5SDimitry Andric LinkageInfo LV; 12360b57cec5SDimitry Andric if (!hasExplicitVisibilityAlready(computation)) { 12370b57cec5SDimitry Andric if (Optional<Visibility> Vis = 12380b57cec5SDimitry Andric getExplicitVisibility(Function, computation)) 12390b57cec5SDimitry Andric LV.mergeVisibility(*Vis, true); 12400b57cec5SDimitry Andric } 12410b57cec5SDimitry Andric 12420b57cec5SDimitry Andric // Note that Sema::MergeCompatibleFunctionDecls already takes care of 12430b57cec5SDimitry Andric // merging storage classes and visibility attributes, so we don't have to 12440b57cec5SDimitry Andric // look at previous decls in here. 12450b57cec5SDimitry Andric 12460b57cec5SDimitry Andric return LV; 12470b57cec5SDimitry Andric } 12480b57cec5SDimitry Andric 12490b57cec5SDimitry Andric if (const auto *Var = dyn_cast<VarDecl>(D)) { 12500b57cec5SDimitry Andric if (Var->hasExternalStorage()) { 12510b57cec5SDimitry Andric if (Var->isInAnonymousNamespace() && !isFirstInExternCContext(Var)) 12520b57cec5SDimitry Andric return getInternalLinkageFor(Var); 12530b57cec5SDimitry Andric 12540b57cec5SDimitry Andric LinkageInfo LV; 12550b57cec5SDimitry Andric if (Var->getStorageClass() == SC_PrivateExtern) 12560b57cec5SDimitry Andric LV.mergeVisibility(HiddenVisibility, true); 12570b57cec5SDimitry Andric else if (!hasExplicitVisibilityAlready(computation)) { 12580b57cec5SDimitry Andric if (Optional<Visibility> Vis = getExplicitVisibility(Var, computation)) 12590b57cec5SDimitry Andric LV.mergeVisibility(*Vis, true); 12600b57cec5SDimitry Andric } 12610b57cec5SDimitry Andric 12620b57cec5SDimitry Andric if (const VarDecl *Prev = Var->getPreviousDecl()) { 12630b57cec5SDimitry Andric LinkageInfo PrevLV = getLVForDecl(Prev, computation); 12640b57cec5SDimitry Andric if (PrevLV.getLinkage()) 12650b57cec5SDimitry Andric LV.setLinkage(PrevLV.getLinkage()); 12660b57cec5SDimitry Andric LV.mergeVisibility(PrevLV); 12670b57cec5SDimitry Andric } 12680b57cec5SDimitry Andric 12690b57cec5SDimitry Andric return LV; 12700b57cec5SDimitry Andric } 12710b57cec5SDimitry Andric 12720b57cec5SDimitry Andric if (!Var->isStaticLocal()) 12730b57cec5SDimitry Andric return LinkageInfo::none(); 12740b57cec5SDimitry Andric } 12750b57cec5SDimitry Andric 12760b57cec5SDimitry Andric ASTContext &Context = D->getASTContext(); 12770b57cec5SDimitry Andric if (!Context.getLangOpts().CPlusPlus) 12780b57cec5SDimitry Andric return LinkageInfo::none(); 12790b57cec5SDimitry Andric 12800b57cec5SDimitry Andric const Decl *OuterD = getOutermostFuncOrBlockContext(D); 12810b57cec5SDimitry Andric if (!OuterD || OuterD->isInvalidDecl()) 12820b57cec5SDimitry Andric return LinkageInfo::none(); 12830b57cec5SDimitry Andric 12840b57cec5SDimitry Andric LinkageInfo LV; 12850b57cec5SDimitry Andric if (const auto *BD = dyn_cast<BlockDecl>(OuterD)) { 12860b57cec5SDimitry Andric if (!BD->getBlockManglingNumber()) 12870b57cec5SDimitry Andric return LinkageInfo::none(); 12880b57cec5SDimitry Andric 12890b57cec5SDimitry Andric LV = getLVForClosure(BD->getDeclContext()->getRedeclContext(), 12900b57cec5SDimitry Andric BD->getBlockManglingContextDecl(), computation); 12910b57cec5SDimitry Andric } else { 12920b57cec5SDimitry Andric const auto *FD = cast<FunctionDecl>(OuterD); 12930b57cec5SDimitry Andric if (!FD->isInlined() && 12940b57cec5SDimitry Andric !isTemplateInstantiation(FD->getTemplateSpecializationKind())) 12950b57cec5SDimitry Andric return LinkageInfo::none(); 12960b57cec5SDimitry Andric 12970b57cec5SDimitry Andric // If a function is hidden by -fvisibility-inlines-hidden option and 12980b57cec5SDimitry Andric // is not explicitly attributed as a hidden function, 12990b57cec5SDimitry Andric // we should not make static local variables in the function hidden. 13000b57cec5SDimitry Andric LV = getLVForDecl(FD, computation); 13010b57cec5SDimitry Andric if (isa<VarDecl>(D) && useInlineVisibilityHidden(FD) && 13020b57cec5SDimitry Andric !LV.isVisibilityExplicit()) { 13030b57cec5SDimitry Andric assert(cast<VarDecl>(D)->isStaticLocal()); 13040b57cec5SDimitry Andric // If this was an implicitly hidden inline method, check again for 13050b57cec5SDimitry Andric // explicit visibility on the parent class, and use that for static locals 13060b57cec5SDimitry Andric // if present. 13070b57cec5SDimitry Andric if (const auto *MD = dyn_cast<CXXMethodDecl>(FD)) 13080b57cec5SDimitry Andric LV = getLVForDecl(MD->getParent(), computation); 13090b57cec5SDimitry Andric if (!LV.isVisibilityExplicit()) { 13100b57cec5SDimitry Andric Visibility globalVisibility = 13110b57cec5SDimitry Andric computation.isValueVisibility() 13120b57cec5SDimitry Andric ? Context.getLangOpts().getValueVisibilityMode() 13130b57cec5SDimitry Andric : Context.getLangOpts().getTypeVisibilityMode(); 13140b57cec5SDimitry Andric return LinkageInfo(VisibleNoLinkage, globalVisibility, 13150b57cec5SDimitry Andric /*visibilityExplicit=*/false); 13160b57cec5SDimitry Andric } 13170b57cec5SDimitry Andric } 13180b57cec5SDimitry Andric } 13190b57cec5SDimitry Andric if (!isExternallyVisible(LV.getLinkage())) 13200b57cec5SDimitry Andric return LinkageInfo::none(); 13210b57cec5SDimitry Andric return LinkageInfo(VisibleNoLinkage, LV.getVisibility(), 13220b57cec5SDimitry Andric LV.isVisibilityExplicit()); 13230b57cec5SDimitry Andric } 13240b57cec5SDimitry Andric 13250b57cec5SDimitry Andric LinkageInfo LinkageComputer::computeLVForDecl(const NamedDecl *D, 13260b57cec5SDimitry Andric LVComputationKind computation, 13270b57cec5SDimitry Andric bool IgnoreVarTypeLinkage) { 13280b57cec5SDimitry Andric // Internal_linkage attribute overrides other considerations. 13290b57cec5SDimitry Andric if (D->hasAttr<InternalLinkageAttr>()) 13300b57cec5SDimitry Andric return getInternalLinkageFor(D); 13310b57cec5SDimitry Andric 13320b57cec5SDimitry Andric // Objective-C: treat all Objective-C declarations as having external 13330b57cec5SDimitry Andric // linkage. 13340b57cec5SDimitry Andric switch (D->getKind()) { 13350b57cec5SDimitry Andric default: 13360b57cec5SDimitry Andric break; 13370b57cec5SDimitry Andric 13380b57cec5SDimitry Andric // Per C++ [basic.link]p2, only the names of objects, references, 13390b57cec5SDimitry Andric // functions, types, templates, namespaces, and values ever have linkage. 13400b57cec5SDimitry Andric // 13410b57cec5SDimitry Andric // Note that the name of a typedef, namespace alias, using declaration, 13420b57cec5SDimitry Andric // and so on are not the name of the corresponding type, namespace, or 13430b57cec5SDimitry Andric // declaration, so they do *not* have linkage. 13440b57cec5SDimitry Andric case Decl::ImplicitParam: 13450b57cec5SDimitry Andric case Decl::Label: 13460b57cec5SDimitry Andric case Decl::NamespaceAlias: 13470b57cec5SDimitry Andric case Decl::ParmVar: 13480b57cec5SDimitry Andric case Decl::Using: 13490b57cec5SDimitry Andric case Decl::UsingShadow: 13500b57cec5SDimitry Andric case Decl::UsingDirective: 13510b57cec5SDimitry Andric return LinkageInfo::none(); 13520b57cec5SDimitry Andric 13530b57cec5SDimitry Andric case Decl::EnumConstant: 13540b57cec5SDimitry Andric // C++ [basic.link]p4: an enumerator has the linkage of its enumeration. 13550b57cec5SDimitry Andric if (D->getASTContext().getLangOpts().CPlusPlus) 13560b57cec5SDimitry Andric return getLVForDecl(cast<EnumDecl>(D->getDeclContext()), computation); 13570b57cec5SDimitry Andric return LinkageInfo::visible_none(); 13580b57cec5SDimitry Andric 13590b57cec5SDimitry Andric case Decl::Typedef: 13600b57cec5SDimitry Andric case Decl::TypeAlias: 13610b57cec5SDimitry Andric // A typedef declaration has linkage if it gives a type a name for 13620b57cec5SDimitry Andric // linkage purposes. 13630b57cec5SDimitry Andric if (!cast<TypedefNameDecl>(D) 13640b57cec5SDimitry Andric ->getAnonDeclWithTypedefName(/*AnyRedecl*/true)) 13650b57cec5SDimitry Andric return LinkageInfo::none(); 13660b57cec5SDimitry Andric break; 13670b57cec5SDimitry Andric 13680b57cec5SDimitry Andric case Decl::TemplateTemplateParm: // count these as external 13690b57cec5SDimitry Andric case Decl::NonTypeTemplateParm: 13700b57cec5SDimitry Andric case Decl::ObjCAtDefsField: 13710b57cec5SDimitry Andric case Decl::ObjCCategory: 13720b57cec5SDimitry Andric case Decl::ObjCCategoryImpl: 13730b57cec5SDimitry Andric case Decl::ObjCCompatibleAlias: 13740b57cec5SDimitry Andric case Decl::ObjCImplementation: 13750b57cec5SDimitry Andric case Decl::ObjCMethod: 13760b57cec5SDimitry Andric case Decl::ObjCProperty: 13770b57cec5SDimitry Andric case Decl::ObjCPropertyImpl: 13780b57cec5SDimitry Andric case Decl::ObjCProtocol: 13790b57cec5SDimitry Andric return getExternalLinkageFor(D); 13800b57cec5SDimitry Andric 13810b57cec5SDimitry Andric case Decl::CXXRecord: { 13820b57cec5SDimitry Andric const auto *Record = cast<CXXRecordDecl>(D); 13830b57cec5SDimitry Andric if (Record->isLambda()) { 1384a7dea167SDimitry Andric if (Record->hasKnownLambdaInternalLinkage() || 1385a7dea167SDimitry Andric !Record->getLambdaManglingNumber()) { 13860b57cec5SDimitry Andric // This lambda has no mangling number, so it's internal. 13870b57cec5SDimitry Andric return getInternalLinkageFor(D); 13880b57cec5SDimitry Andric } 13890b57cec5SDimitry Andric 13900b57cec5SDimitry Andric return getLVForClosure( 13915ffd83dbSDimitry Andric Record->getDeclContext()->getRedeclContext(), 13925ffd83dbSDimitry Andric Record->getLambdaContextDecl(), computation); 13930b57cec5SDimitry Andric } 13940b57cec5SDimitry Andric 13950b57cec5SDimitry Andric break; 13960b57cec5SDimitry Andric } 13970b57cec5SDimitry Andric } 13980b57cec5SDimitry Andric 13990b57cec5SDimitry Andric // Handle linkage for namespace-scope names. 14000b57cec5SDimitry Andric if (D->getDeclContext()->getRedeclContext()->isFileContext()) 14010b57cec5SDimitry Andric return getLVForNamespaceScopeDecl(D, computation, IgnoreVarTypeLinkage); 14020b57cec5SDimitry Andric 14030b57cec5SDimitry Andric // C++ [basic.link]p5: 14040b57cec5SDimitry Andric // In addition, a member function, static data member, a named 14050b57cec5SDimitry Andric // class or enumeration of class scope, or an unnamed class or 14060b57cec5SDimitry Andric // enumeration defined in a class-scope typedef declaration such 14070b57cec5SDimitry Andric // that the class or enumeration has the typedef name for linkage 14080b57cec5SDimitry Andric // purposes (7.1.3), has external linkage if the name of the class 14090b57cec5SDimitry Andric // has external linkage. 14100b57cec5SDimitry Andric if (D->getDeclContext()->isRecord()) 14110b57cec5SDimitry Andric return getLVForClassMember(D, computation, IgnoreVarTypeLinkage); 14120b57cec5SDimitry Andric 14130b57cec5SDimitry Andric // C++ [basic.link]p6: 14140b57cec5SDimitry Andric // The name of a function declared in block scope and the name of 14150b57cec5SDimitry Andric // an object declared by a block scope extern declaration have 14160b57cec5SDimitry Andric // linkage. If there is a visible declaration of an entity with 14170b57cec5SDimitry Andric // linkage having the same name and type, ignoring entities 14180b57cec5SDimitry Andric // declared outside the innermost enclosing namespace scope, the 14190b57cec5SDimitry Andric // block scope declaration declares that same entity and receives 14200b57cec5SDimitry Andric // the linkage of the previous declaration. If there is more than 14210b57cec5SDimitry Andric // one such matching entity, the program is ill-formed. Otherwise, 14220b57cec5SDimitry Andric // if no matching entity is found, the block scope entity receives 14230b57cec5SDimitry Andric // external linkage. 14240b57cec5SDimitry Andric if (D->getDeclContext()->isFunctionOrMethod()) 14250b57cec5SDimitry Andric return getLVForLocalDecl(D, computation); 14260b57cec5SDimitry Andric 14270b57cec5SDimitry Andric // C++ [basic.link]p6: 14280b57cec5SDimitry Andric // Names not covered by these rules have no linkage. 14290b57cec5SDimitry Andric return LinkageInfo::none(); 14300b57cec5SDimitry Andric } 14310b57cec5SDimitry Andric 14320b57cec5SDimitry Andric /// getLVForDecl - Get the linkage and visibility for the given declaration. 14330b57cec5SDimitry Andric LinkageInfo LinkageComputer::getLVForDecl(const NamedDecl *D, 14340b57cec5SDimitry Andric LVComputationKind computation) { 14350b57cec5SDimitry Andric // Internal_linkage attribute overrides other considerations. 14360b57cec5SDimitry Andric if (D->hasAttr<InternalLinkageAttr>()) 14370b57cec5SDimitry Andric return getInternalLinkageFor(D); 14380b57cec5SDimitry Andric 14390b57cec5SDimitry Andric if (computation.IgnoreAllVisibility && D->hasCachedLinkage()) 14400b57cec5SDimitry Andric return LinkageInfo(D->getCachedLinkage(), DefaultVisibility, false); 14410b57cec5SDimitry Andric 14420b57cec5SDimitry Andric if (llvm::Optional<LinkageInfo> LI = lookup(D, computation)) 14430b57cec5SDimitry Andric return *LI; 14440b57cec5SDimitry Andric 14450b57cec5SDimitry Andric LinkageInfo LV = computeLVForDecl(D, computation); 14460b57cec5SDimitry Andric if (D->hasCachedLinkage()) 14470b57cec5SDimitry Andric assert(D->getCachedLinkage() == LV.getLinkage()); 14480b57cec5SDimitry Andric 14490b57cec5SDimitry Andric D->setCachedLinkage(LV.getLinkage()); 14500b57cec5SDimitry Andric cache(D, computation, LV); 14510b57cec5SDimitry Andric 14520b57cec5SDimitry Andric #ifndef NDEBUG 14530b57cec5SDimitry Andric // In C (because of gnu inline) and in c++ with microsoft extensions an 14540b57cec5SDimitry Andric // static can follow an extern, so we can have two decls with different 14550b57cec5SDimitry Andric // linkages. 14560b57cec5SDimitry Andric const LangOptions &Opts = D->getASTContext().getLangOpts(); 14570b57cec5SDimitry Andric if (!Opts.CPlusPlus || Opts.MicrosoftExt) 14580b57cec5SDimitry Andric return LV; 14590b57cec5SDimitry Andric 14600b57cec5SDimitry Andric // We have just computed the linkage for this decl. By induction we know 14610b57cec5SDimitry Andric // that all other computed linkages match, check that the one we just 14620b57cec5SDimitry Andric // computed also does. 14630b57cec5SDimitry Andric NamedDecl *Old = nullptr; 14640b57cec5SDimitry Andric for (auto I : D->redecls()) { 14650b57cec5SDimitry Andric auto *T = cast<NamedDecl>(I); 14660b57cec5SDimitry Andric if (T == D) 14670b57cec5SDimitry Andric continue; 14680b57cec5SDimitry Andric if (!T->isInvalidDecl() && T->hasCachedLinkage()) { 14690b57cec5SDimitry Andric Old = T; 14700b57cec5SDimitry Andric break; 14710b57cec5SDimitry Andric } 14720b57cec5SDimitry Andric } 14730b57cec5SDimitry Andric assert(!Old || Old->getCachedLinkage() == D->getCachedLinkage()); 14740b57cec5SDimitry Andric #endif 14750b57cec5SDimitry Andric 14760b57cec5SDimitry Andric return LV; 14770b57cec5SDimitry Andric } 14780b57cec5SDimitry Andric 14790b57cec5SDimitry Andric LinkageInfo LinkageComputer::getDeclLinkageAndVisibility(const NamedDecl *D) { 14800b57cec5SDimitry Andric return getLVForDecl(D, 14810b57cec5SDimitry Andric LVComputationKind(usesTypeVisibility(D) 14820b57cec5SDimitry Andric ? NamedDecl::VisibilityForType 14830b57cec5SDimitry Andric : NamedDecl::VisibilityForValue)); 14840b57cec5SDimitry Andric } 14850b57cec5SDimitry Andric 14860b57cec5SDimitry Andric Module *Decl::getOwningModuleForLinkage(bool IgnoreLinkage) const { 14870b57cec5SDimitry Andric Module *M = getOwningModule(); 14880b57cec5SDimitry Andric if (!M) 14890b57cec5SDimitry Andric return nullptr; 14900b57cec5SDimitry Andric 14910b57cec5SDimitry Andric switch (M->Kind) { 14920b57cec5SDimitry Andric case Module::ModuleMapModule: 14930b57cec5SDimitry Andric // Module map modules have no special linkage semantics. 14940b57cec5SDimitry Andric return nullptr; 14950b57cec5SDimitry Andric 14960b57cec5SDimitry Andric case Module::ModuleInterfaceUnit: 14970b57cec5SDimitry Andric return M; 14980b57cec5SDimitry Andric 14990b57cec5SDimitry Andric case Module::GlobalModuleFragment: { 15000b57cec5SDimitry Andric // External linkage declarations in the global module have no owning module 15010b57cec5SDimitry Andric // for linkage purposes. But internal linkage declarations in the global 15020b57cec5SDimitry Andric // module fragment of a particular module are owned by that module for 15030b57cec5SDimitry Andric // linkage purposes. 15040b57cec5SDimitry Andric if (IgnoreLinkage) 15050b57cec5SDimitry Andric return nullptr; 15060b57cec5SDimitry Andric bool InternalLinkage; 15070b57cec5SDimitry Andric if (auto *ND = dyn_cast<NamedDecl>(this)) 15080b57cec5SDimitry Andric InternalLinkage = !ND->hasExternalFormalLinkage(); 15090b57cec5SDimitry Andric else { 15100b57cec5SDimitry Andric auto *NSD = dyn_cast<NamespaceDecl>(this); 15110b57cec5SDimitry Andric InternalLinkage = (NSD && NSD->isAnonymousNamespace()) || 15120b57cec5SDimitry Andric isInAnonymousNamespace(); 15130b57cec5SDimitry Andric } 15140b57cec5SDimitry Andric return InternalLinkage ? M->Parent : nullptr; 15150b57cec5SDimitry Andric } 15160b57cec5SDimitry Andric 15170b57cec5SDimitry Andric case Module::PrivateModuleFragment: 15180b57cec5SDimitry Andric // The private module fragment is part of its containing module for linkage 15190b57cec5SDimitry Andric // purposes. 15200b57cec5SDimitry Andric return M->Parent; 15210b57cec5SDimitry Andric } 15220b57cec5SDimitry Andric 15230b57cec5SDimitry Andric llvm_unreachable("unknown module kind"); 15240b57cec5SDimitry Andric } 15250b57cec5SDimitry Andric 15260b57cec5SDimitry Andric void NamedDecl::printName(raw_ostream &os) const { 15270b57cec5SDimitry Andric os << Name; 15280b57cec5SDimitry Andric } 15290b57cec5SDimitry Andric 15300b57cec5SDimitry Andric std::string NamedDecl::getQualifiedNameAsString() const { 15310b57cec5SDimitry Andric std::string QualName; 15320b57cec5SDimitry Andric llvm::raw_string_ostream OS(QualName); 15330b57cec5SDimitry Andric printQualifiedName(OS, getASTContext().getPrintingPolicy()); 15340b57cec5SDimitry Andric return OS.str(); 15350b57cec5SDimitry Andric } 15360b57cec5SDimitry Andric 15370b57cec5SDimitry Andric void NamedDecl::printQualifiedName(raw_ostream &OS) const { 15380b57cec5SDimitry Andric printQualifiedName(OS, getASTContext().getPrintingPolicy()); 15390b57cec5SDimitry Andric } 15400b57cec5SDimitry Andric 15410b57cec5SDimitry Andric void NamedDecl::printQualifiedName(raw_ostream &OS, 15420b57cec5SDimitry Andric const PrintingPolicy &P) const { 1543a7dea167SDimitry Andric if (getDeclContext()->isFunctionOrMethod()) { 1544a7dea167SDimitry Andric // We do not print '(anonymous)' for function parameters without name. 1545a7dea167SDimitry Andric printName(OS); 1546a7dea167SDimitry Andric return; 1547a7dea167SDimitry Andric } 1548a7dea167SDimitry Andric printNestedNameSpecifier(OS, P); 15495ffd83dbSDimitry Andric if (getDeclName()) 1550a7dea167SDimitry Andric OS << *this; 15515ffd83dbSDimitry Andric else { 15525ffd83dbSDimitry Andric // Give the printName override a chance to pick a different name before we 15535ffd83dbSDimitry Andric // fall back to "(anonymous)". 15545ffd83dbSDimitry Andric SmallString<64> NameBuffer; 15555ffd83dbSDimitry Andric llvm::raw_svector_ostream NameOS(NameBuffer); 15565ffd83dbSDimitry Andric printName(NameOS); 15575ffd83dbSDimitry Andric if (NameBuffer.empty()) 1558a7dea167SDimitry Andric OS << "(anonymous)"; 15595ffd83dbSDimitry Andric else 15605ffd83dbSDimitry Andric OS << NameBuffer; 15615ffd83dbSDimitry Andric } 1562a7dea167SDimitry Andric } 1563a7dea167SDimitry Andric 1564a7dea167SDimitry Andric void NamedDecl::printNestedNameSpecifier(raw_ostream &OS) const { 1565a7dea167SDimitry Andric printNestedNameSpecifier(OS, getASTContext().getPrintingPolicy()); 1566a7dea167SDimitry Andric } 1567a7dea167SDimitry Andric 1568a7dea167SDimitry Andric void NamedDecl::printNestedNameSpecifier(raw_ostream &OS, 1569a7dea167SDimitry Andric const PrintingPolicy &P) const { 15700b57cec5SDimitry Andric const DeclContext *Ctx = getDeclContext(); 15710b57cec5SDimitry Andric 15720b57cec5SDimitry Andric // For ObjC methods and properties, look through categories and use the 15730b57cec5SDimitry Andric // interface as context. 15745ffd83dbSDimitry Andric if (auto *MD = dyn_cast<ObjCMethodDecl>(this)) { 15750b57cec5SDimitry Andric if (auto *ID = MD->getClassInterface()) 15760b57cec5SDimitry Andric Ctx = ID; 15775ffd83dbSDimitry Andric } else if (auto *PD = dyn_cast<ObjCPropertyDecl>(this)) { 15780b57cec5SDimitry Andric if (auto *MD = PD->getGetterMethodDecl()) 15790b57cec5SDimitry Andric if (auto *ID = MD->getClassInterface()) 15800b57cec5SDimitry Andric Ctx = ID; 15815ffd83dbSDimitry Andric } else if (auto *ID = dyn_cast<ObjCIvarDecl>(this)) { 15825ffd83dbSDimitry Andric if (auto *CI = ID->getContainingInterface()) 15835ffd83dbSDimitry Andric Ctx = CI; 15840b57cec5SDimitry Andric } 15850b57cec5SDimitry Andric 1586a7dea167SDimitry Andric if (Ctx->isFunctionOrMethod()) 15870b57cec5SDimitry Andric return; 15880b57cec5SDimitry Andric 15890b57cec5SDimitry Andric using ContextsTy = SmallVector<const DeclContext *, 8>; 15900b57cec5SDimitry Andric ContextsTy Contexts; 15910b57cec5SDimitry Andric 15920b57cec5SDimitry Andric // Collect named contexts. 15930b57cec5SDimitry Andric while (Ctx) { 15940b57cec5SDimitry Andric if (isa<NamedDecl>(Ctx)) 15950b57cec5SDimitry Andric Contexts.push_back(Ctx); 15960b57cec5SDimitry Andric Ctx = Ctx->getParent(); 15970b57cec5SDimitry Andric } 15980b57cec5SDimitry Andric 15990b57cec5SDimitry Andric for (const DeclContext *DC : llvm::reverse(Contexts)) { 16000b57cec5SDimitry Andric if (const auto *Spec = dyn_cast<ClassTemplateSpecializationDecl>(DC)) { 16010b57cec5SDimitry Andric OS << Spec->getName(); 16020b57cec5SDimitry Andric const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 16030b57cec5SDimitry Andric printTemplateArgumentList(OS, TemplateArgs.asArray(), P); 16040b57cec5SDimitry Andric } else if (const auto *ND = dyn_cast<NamespaceDecl>(DC)) { 16050b57cec5SDimitry Andric if (P.SuppressUnwrittenScope && 16060b57cec5SDimitry Andric (ND->isAnonymousNamespace() || ND->isInline())) 16070b57cec5SDimitry Andric continue; 16080b57cec5SDimitry Andric if (ND->isAnonymousNamespace()) { 16090b57cec5SDimitry Andric OS << (P.MSVCFormatting ? "`anonymous namespace\'" 16100b57cec5SDimitry Andric : "(anonymous namespace)"); 16110b57cec5SDimitry Andric } 16120b57cec5SDimitry Andric else 16130b57cec5SDimitry Andric OS << *ND; 16140b57cec5SDimitry Andric } else if (const auto *RD = dyn_cast<RecordDecl>(DC)) { 16150b57cec5SDimitry Andric if (!RD->getIdentifier()) 16160b57cec5SDimitry Andric OS << "(anonymous " << RD->getKindName() << ')'; 16170b57cec5SDimitry Andric else 16180b57cec5SDimitry Andric OS << *RD; 16190b57cec5SDimitry Andric } else if (const auto *FD = dyn_cast<FunctionDecl>(DC)) { 16200b57cec5SDimitry Andric const FunctionProtoType *FT = nullptr; 16210b57cec5SDimitry Andric if (FD->hasWrittenPrototype()) 16220b57cec5SDimitry Andric FT = dyn_cast<FunctionProtoType>(FD->getType()->castAs<FunctionType>()); 16230b57cec5SDimitry Andric 16240b57cec5SDimitry Andric OS << *FD << '('; 16250b57cec5SDimitry Andric if (FT) { 16260b57cec5SDimitry Andric unsigned NumParams = FD->getNumParams(); 16270b57cec5SDimitry Andric for (unsigned i = 0; i < NumParams; ++i) { 16280b57cec5SDimitry Andric if (i) 16290b57cec5SDimitry Andric OS << ", "; 16300b57cec5SDimitry Andric OS << FD->getParamDecl(i)->getType().stream(P); 16310b57cec5SDimitry Andric } 16320b57cec5SDimitry Andric 16330b57cec5SDimitry Andric if (FT->isVariadic()) { 16340b57cec5SDimitry Andric if (NumParams > 0) 16350b57cec5SDimitry Andric OS << ", "; 16360b57cec5SDimitry Andric OS << "..."; 16370b57cec5SDimitry Andric } 16380b57cec5SDimitry Andric } 16390b57cec5SDimitry Andric OS << ')'; 16400b57cec5SDimitry Andric } else if (const auto *ED = dyn_cast<EnumDecl>(DC)) { 16410b57cec5SDimitry Andric // C++ [dcl.enum]p10: Each enum-name and each unscoped 16420b57cec5SDimitry Andric // enumerator is declared in the scope that immediately contains 16430b57cec5SDimitry Andric // the enum-specifier. Each scoped enumerator is declared in the 16440b57cec5SDimitry Andric // scope of the enumeration. 16450b57cec5SDimitry Andric // For the case of unscoped enumerator, do not include in the qualified 16460b57cec5SDimitry Andric // name any information about its enum enclosing scope, as its visibility 16470b57cec5SDimitry Andric // is global. 16480b57cec5SDimitry Andric if (ED->isScoped()) 16490b57cec5SDimitry Andric OS << *ED; 16500b57cec5SDimitry Andric else 16510b57cec5SDimitry Andric continue; 16520b57cec5SDimitry Andric } else { 16530b57cec5SDimitry Andric OS << *cast<NamedDecl>(DC); 16540b57cec5SDimitry Andric } 16550b57cec5SDimitry Andric OS << "::"; 16560b57cec5SDimitry Andric } 16570b57cec5SDimitry Andric } 16580b57cec5SDimitry Andric 16590b57cec5SDimitry Andric void NamedDecl::getNameForDiagnostic(raw_ostream &OS, 16600b57cec5SDimitry Andric const PrintingPolicy &Policy, 16610b57cec5SDimitry Andric bool Qualified) const { 16620b57cec5SDimitry Andric if (Qualified) 16630b57cec5SDimitry Andric printQualifiedName(OS, Policy); 16640b57cec5SDimitry Andric else 16650b57cec5SDimitry Andric printName(OS); 16660b57cec5SDimitry Andric } 16670b57cec5SDimitry Andric 16680b57cec5SDimitry Andric template<typename T> static bool isRedeclarableImpl(Redeclarable<T> *) { 16690b57cec5SDimitry Andric return true; 16700b57cec5SDimitry Andric } 16710b57cec5SDimitry Andric static bool isRedeclarableImpl(...) { return false; } 16720b57cec5SDimitry Andric static bool isRedeclarable(Decl::Kind K) { 16730b57cec5SDimitry Andric switch (K) { 16740b57cec5SDimitry Andric #define DECL(Type, Base) \ 16750b57cec5SDimitry Andric case Decl::Type: \ 16760b57cec5SDimitry Andric return isRedeclarableImpl((Type##Decl *)nullptr); 16770b57cec5SDimitry Andric #define ABSTRACT_DECL(DECL) 16780b57cec5SDimitry Andric #include "clang/AST/DeclNodes.inc" 16790b57cec5SDimitry Andric } 16800b57cec5SDimitry Andric llvm_unreachable("unknown decl kind"); 16810b57cec5SDimitry Andric } 16820b57cec5SDimitry Andric 16830b57cec5SDimitry Andric bool NamedDecl::declarationReplaces(NamedDecl *OldD, bool IsKnownNewer) const { 16840b57cec5SDimitry Andric assert(getDeclName() == OldD->getDeclName() && "Declaration name mismatch"); 16850b57cec5SDimitry Andric 16860b57cec5SDimitry Andric // Never replace one imported declaration with another; we need both results 16870b57cec5SDimitry Andric // when re-exporting. 16880b57cec5SDimitry Andric if (OldD->isFromASTFile() && isFromASTFile()) 16890b57cec5SDimitry Andric return false; 16900b57cec5SDimitry Andric 16910b57cec5SDimitry Andric // A kind mismatch implies that the declaration is not replaced. 16920b57cec5SDimitry Andric if (OldD->getKind() != getKind()) 16930b57cec5SDimitry Andric return false; 16940b57cec5SDimitry Andric 16950b57cec5SDimitry Andric // For method declarations, we never replace. (Why?) 16960b57cec5SDimitry Andric if (isa<ObjCMethodDecl>(this)) 16970b57cec5SDimitry Andric return false; 16980b57cec5SDimitry Andric 16990b57cec5SDimitry Andric // For parameters, pick the newer one. This is either an error or (in 17000b57cec5SDimitry Andric // Objective-C) permitted as an extension. 17010b57cec5SDimitry Andric if (isa<ParmVarDecl>(this)) 17020b57cec5SDimitry Andric return true; 17030b57cec5SDimitry Andric 17040b57cec5SDimitry Andric // Inline namespaces can give us two declarations with the same 17050b57cec5SDimitry Andric // name and kind in the same scope but different contexts; we should 17060b57cec5SDimitry Andric // keep both declarations in this case. 17070b57cec5SDimitry Andric if (!this->getDeclContext()->getRedeclContext()->Equals( 17080b57cec5SDimitry Andric OldD->getDeclContext()->getRedeclContext())) 17090b57cec5SDimitry Andric return false; 17100b57cec5SDimitry Andric 17110b57cec5SDimitry Andric // Using declarations can be replaced if they import the same name from the 17120b57cec5SDimitry Andric // same context. 17130b57cec5SDimitry Andric if (auto *UD = dyn_cast<UsingDecl>(this)) { 17140b57cec5SDimitry Andric ASTContext &Context = getASTContext(); 17150b57cec5SDimitry Andric return Context.getCanonicalNestedNameSpecifier(UD->getQualifier()) == 17160b57cec5SDimitry Andric Context.getCanonicalNestedNameSpecifier( 17170b57cec5SDimitry Andric cast<UsingDecl>(OldD)->getQualifier()); 17180b57cec5SDimitry Andric } 17190b57cec5SDimitry Andric if (auto *UUVD = dyn_cast<UnresolvedUsingValueDecl>(this)) { 17200b57cec5SDimitry Andric ASTContext &Context = getASTContext(); 17210b57cec5SDimitry Andric return Context.getCanonicalNestedNameSpecifier(UUVD->getQualifier()) == 17220b57cec5SDimitry Andric Context.getCanonicalNestedNameSpecifier( 17230b57cec5SDimitry Andric cast<UnresolvedUsingValueDecl>(OldD)->getQualifier()); 17240b57cec5SDimitry Andric } 17250b57cec5SDimitry Andric 17260b57cec5SDimitry Andric if (isRedeclarable(getKind())) { 17270b57cec5SDimitry Andric if (getCanonicalDecl() != OldD->getCanonicalDecl()) 17280b57cec5SDimitry Andric return false; 17290b57cec5SDimitry Andric 17300b57cec5SDimitry Andric if (IsKnownNewer) 17310b57cec5SDimitry Andric return true; 17320b57cec5SDimitry Andric 17330b57cec5SDimitry Andric // Check whether this is actually newer than OldD. We want to keep the 17340b57cec5SDimitry Andric // newer declaration. This loop will usually only iterate once, because 17350b57cec5SDimitry Andric // OldD is usually the previous declaration. 17360b57cec5SDimitry Andric for (auto D : redecls()) { 17370b57cec5SDimitry Andric if (D == OldD) 17380b57cec5SDimitry Andric break; 17390b57cec5SDimitry Andric 17400b57cec5SDimitry Andric // If we reach the canonical declaration, then OldD is not actually older 17410b57cec5SDimitry Andric // than this one. 17420b57cec5SDimitry Andric // 17430b57cec5SDimitry Andric // FIXME: In this case, we should not add this decl to the lookup table. 17440b57cec5SDimitry Andric if (D->isCanonicalDecl()) 17450b57cec5SDimitry Andric return false; 17460b57cec5SDimitry Andric } 17470b57cec5SDimitry Andric 17480b57cec5SDimitry Andric // It's a newer declaration of the same kind of declaration in the same 17490b57cec5SDimitry Andric // scope: we want this decl instead of the existing one. 17500b57cec5SDimitry Andric return true; 17510b57cec5SDimitry Andric } 17520b57cec5SDimitry Andric 17530b57cec5SDimitry Andric // In all other cases, we need to keep both declarations in case they have 17540b57cec5SDimitry Andric // different visibility. Any attempt to use the name will result in an 17550b57cec5SDimitry Andric // ambiguity if more than one is visible. 17560b57cec5SDimitry Andric return false; 17570b57cec5SDimitry Andric } 17580b57cec5SDimitry Andric 17590b57cec5SDimitry Andric bool NamedDecl::hasLinkage() const { 17600b57cec5SDimitry Andric return getFormalLinkage() != NoLinkage; 17610b57cec5SDimitry Andric } 17620b57cec5SDimitry Andric 17630b57cec5SDimitry Andric NamedDecl *NamedDecl::getUnderlyingDeclImpl() { 17640b57cec5SDimitry Andric NamedDecl *ND = this; 17650b57cec5SDimitry Andric while (auto *UD = dyn_cast<UsingShadowDecl>(ND)) 17660b57cec5SDimitry Andric ND = UD->getTargetDecl(); 17670b57cec5SDimitry Andric 17680b57cec5SDimitry Andric if (auto *AD = dyn_cast<ObjCCompatibleAliasDecl>(ND)) 17690b57cec5SDimitry Andric return AD->getClassInterface(); 17700b57cec5SDimitry Andric 17710b57cec5SDimitry Andric if (auto *AD = dyn_cast<NamespaceAliasDecl>(ND)) 17720b57cec5SDimitry Andric return AD->getNamespace(); 17730b57cec5SDimitry Andric 17740b57cec5SDimitry Andric return ND; 17750b57cec5SDimitry Andric } 17760b57cec5SDimitry Andric 17770b57cec5SDimitry Andric bool NamedDecl::isCXXInstanceMember() const { 17780b57cec5SDimitry Andric if (!isCXXClassMember()) 17790b57cec5SDimitry Andric return false; 17800b57cec5SDimitry Andric 17810b57cec5SDimitry Andric const NamedDecl *D = this; 17820b57cec5SDimitry Andric if (isa<UsingShadowDecl>(D)) 17830b57cec5SDimitry Andric D = cast<UsingShadowDecl>(D)->getTargetDecl(); 17840b57cec5SDimitry Andric 17850b57cec5SDimitry Andric if (isa<FieldDecl>(D) || isa<IndirectFieldDecl>(D) || isa<MSPropertyDecl>(D)) 17860b57cec5SDimitry Andric return true; 17870b57cec5SDimitry Andric if (const auto *MD = dyn_cast_or_null<CXXMethodDecl>(D->getAsFunction())) 17880b57cec5SDimitry Andric return MD->isInstance(); 17890b57cec5SDimitry Andric return false; 17900b57cec5SDimitry Andric } 17910b57cec5SDimitry Andric 17920b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 17930b57cec5SDimitry Andric // DeclaratorDecl Implementation 17940b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 17950b57cec5SDimitry Andric 17960b57cec5SDimitry Andric template <typename DeclT> 17970b57cec5SDimitry Andric static SourceLocation getTemplateOrInnerLocStart(const DeclT *decl) { 17980b57cec5SDimitry Andric if (decl->getNumTemplateParameterLists() > 0) 17990b57cec5SDimitry Andric return decl->getTemplateParameterList(0)->getTemplateLoc(); 18000b57cec5SDimitry Andric else 18010b57cec5SDimitry Andric return decl->getInnerLocStart(); 18020b57cec5SDimitry Andric } 18030b57cec5SDimitry Andric 18040b57cec5SDimitry Andric SourceLocation DeclaratorDecl::getTypeSpecStartLoc() const { 18050b57cec5SDimitry Andric TypeSourceInfo *TSI = getTypeSourceInfo(); 18060b57cec5SDimitry Andric if (TSI) return TSI->getTypeLoc().getBeginLoc(); 18070b57cec5SDimitry Andric return SourceLocation(); 18080b57cec5SDimitry Andric } 18090b57cec5SDimitry Andric 1810480093f4SDimitry Andric SourceLocation DeclaratorDecl::getTypeSpecEndLoc() const { 1811480093f4SDimitry Andric TypeSourceInfo *TSI = getTypeSourceInfo(); 1812480093f4SDimitry Andric if (TSI) return TSI->getTypeLoc().getEndLoc(); 1813480093f4SDimitry Andric return SourceLocation(); 1814480093f4SDimitry Andric } 1815480093f4SDimitry Andric 18160b57cec5SDimitry Andric void DeclaratorDecl::setQualifierInfo(NestedNameSpecifierLoc QualifierLoc) { 18170b57cec5SDimitry Andric if (QualifierLoc) { 18180b57cec5SDimitry Andric // Make sure the extended decl info is allocated. 18190b57cec5SDimitry Andric if (!hasExtInfo()) { 18200b57cec5SDimitry Andric // Save (non-extended) type source info pointer. 18210b57cec5SDimitry Andric auto *savedTInfo = DeclInfo.get<TypeSourceInfo*>(); 18220b57cec5SDimitry Andric // Allocate external info struct. 18230b57cec5SDimitry Andric DeclInfo = new (getASTContext()) ExtInfo; 18240b57cec5SDimitry Andric // Restore savedTInfo into (extended) decl info. 18250b57cec5SDimitry Andric getExtInfo()->TInfo = savedTInfo; 18260b57cec5SDimitry Andric } 18270b57cec5SDimitry Andric // Set qualifier info. 18280b57cec5SDimitry Andric getExtInfo()->QualifierLoc = QualifierLoc; 1829480093f4SDimitry Andric } else if (hasExtInfo()) { 18300b57cec5SDimitry Andric // Here Qualifier == 0, i.e., we are removing the qualifier (if any). 18310b57cec5SDimitry Andric getExtInfo()->QualifierLoc = QualifierLoc; 18320b57cec5SDimitry Andric } 18330b57cec5SDimitry Andric } 1834480093f4SDimitry Andric 1835480093f4SDimitry Andric void DeclaratorDecl::setTrailingRequiresClause(Expr *TrailingRequiresClause) { 1836480093f4SDimitry Andric assert(TrailingRequiresClause); 1837480093f4SDimitry Andric // Make sure the extended decl info is allocated. 1838480093f4SDimitry Andric if (!hasExtInfo()) { 1839480093f4SDimitry Andric // Save (non-extended) type source info pointer. 1840480093f4SDimitry Andric auto *savedTInfo = DeclInfo.get<TypeSourceInfo*>(); 1841480093f4SDimitry Andric // Allocate external info struct. 1842480093f4SDimitry Andric DeclInfo = new (getASTContext()) ExtInfo; 1843480093f4SDimitry Andric // Restore savedTInfo into (extended) decl info. 1844480093f4SDimitry Andric getExtInfo()->TInfo = savedTInfo; 1845480093f4SDimitry Andric } 1846480093f4SDimitry Andric // Set requires clause info. 1847480093f4SDimitry Andric getExtInfo()->TrailingRequiresClause = TrailingRequiresClause; 18480b57cec5SDimitry Andric } 18490b57cec5SDimitry Andric 18500b57cec5SDimitry Andric void DeclaratorDecl::setTemplateParameterListsInfo( 18510b57cec5SDimitry Andric ASTContext &Context, ArrayRef<TemplateParameterList *> TPLists) { 18520b57cec5SDimitry Andric assert(!TPLists.empty()); 18530b57cec5SDimitry Andric // Make sure the extended decl info is allocated. 18540b57cec5SDimitry Andric if (!hasExtInfo()) { 18550b57cec5SDimitry Andric // Save (non-extended) type source info pointer. 18560b57cec5SDimitry Andric auto *savedTInfo = DeclInfo.get<TypeSourceInfo*>(); 18570b57cec5SDimitry Andric // Allocate external info struct. 18580b57cec5SDimitry Andric DeclInfo = new (getASTContext()) ExtInfo; 18590b57cec5SDimitry Andric // Restore savedTInfo into (extended) decl info. 18600b57cec5SDimitry Andric getExtInfo()->TInfo = savedTInfo; 18610b57cec5SDimitry Andric } 18620b57cec5SDimitry Andric // Set the template parameter lists info. 18630b57cec5SDimitry Andric getExtInfo()->setTemplateParameterListsInfo(Context, TPLists); 18640b57cec5SDimitry Andric } 18650b57cec5SDimitry Andric 18660b57cec5SDimitry Andric SourceLocation DeclaratorDecl::getOuterLocStart() const { 18670b57cec5SDimitry Andric return getTemplateOrInnerLocStart(this); 18680b57cec5SDimitry Andric } 18690b57cec5SDimitry Andric 18700b57cec5SDimitry Andric // Helper function: returns true if QT is or contains a type 18710b57cec5SDimitry Andric // having a postfix component. 18720b57cec5SDimitry Andric static bool typeIsPostfix(QualType QT) { 18730b57cec5SDimitry Andric while (true) { 18740b57cec5SDimitry Andric const Type* T = QT.getTypePtr(); 18750b57cec5SDimitry Andric switch (T->getTypeClass()) { 18760b57cec5SDimitry Andric default: 18770b57cec5SDimitry Andric return false; 18780b57cec5SDimitry Andric case Type::Pointer: 18790b57cec5SDimitry Andric QT = cast<PointerType>(T)->getPointeeType(); 18800b57cec5SDimitry Andric break; 18810b57cec5SDimitry Andric case Type::BlockPointer: 18820b57cec5SDimitry Andric QT = cast<BlockPointerType>(T)->getPointeeType(); 18830b57cec5SDimitry Andric break; 18840b57cec5SDimitry Andric case Type::MemberPointer: 18850b57cec5SDimitry Andric QT = cast<MemberPointerType>(T)->getPointeeType(); 18860b57cec5SDimitry Andric break; 18870b57cec5SDimitry Andric case Type::LValueReference: 18880b57cec5SDimitry Andric case Type::RValueReference: 18890b57cec5SDimitry Andric QT = cast<ReferenceType>(T)->getPointeeType(); 18900b57cec5SDimitry Andric break; 18910b57cec5SDimitry Andric case Type::PackExpansion: 18920b57cec5SDimitry Andric QT = cast<PackExpansionType>(T)->getPattern(); 18930b57cec5SDimitry Andric break; 18940b57cec5SDimitry Andric case Type::Paren: 18950b57cec5SDimitry Andric case Type::ConstantArray: 18960b57cec5SDimitry Andric case Type::DependentSizedArray: 18970b57cec5SDimitry Andric case Type::IncompleteArray: 18980b57cec5SDimitry Andric case Type::VariableArray: 18990b57cec5SDimitry Andric case Type::FunctionProto: 19000b57cec5SDimitry Andric case Type::FunctionNoProto: 19010b57cec5SDimitry Andric return true; 19020b57cec5SDimitry Andric } 19030b57cec5SDimitry Andric } 19040b57cec5SDimitry Andric } 19050b57cec5SDimitry Andric 19060b57cec5SDimitry Andric SourceRange DeclaratorDecl::getSourceRange() const { 19070b57cec5SDimitry Andric SourceLocation RangeEnd = getLocation(); 19080b57cec5SDimitry Andric if (TypeSourceInfo *TInfo = getTypeSourceInfo()) { 19090b57cec5SDimitry Andric // If the declaration has no name or the type extends past the name take the 19100b57cec5SDimitry Andric // end location of the type. 19110b57cec5SDimitry Andric if (!getDeclName() || typeIsPostfix(TInfo->getType())) 19120b57cec5SDimitry Andric RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd(); 19130b57cec5SDimitry Andric } 19140b57cec5SDimitry Andric return SourceRange(getOuterLocStart(), RangeEnd); 19150b57cec5SDimitry Andric } 19160b57cec5SDimitry Andric 19170b57cec5SDimitry Andric void QualifierInfo::setTemplateParameterListsInfo( 19180b57cec5SDimitry Andric ASTContext &Context, ArrayRef<TemplateParameterList *> TPLists) { 19190b57cec5SDimitry Andric // Free previous template parameters (if any). 19200b57cec5SDimitry Andric if (NumTemplParamLists > 0) { 19210b57cec5SDimitry Andric Context.Deallocate(TemplParamLists); 19220b57cec5SDimitry Andric TemplParamLists = nullptr; 19230b57cec5SDimitry Andric NumTemplParamLists = 0; 19240b57cec5SDimitry Andric } 19250b57cec5SDimitry Andric // Set info on matched template parameter lists (if any). 19260b57cec5SDimitry Andric if (!TPLists.empty()) { 19270b57cec5SDimitry Andric TemplParamLists = new (Context) TemplateParameterList *[TPLists.size()]; 19280b57cec5SDimitry Andric NumTemplParamLists = TPLists.size(); 19290b57cec5SDimitry Andric std::copy(TPLists.begin(), TPLists.end(), TemplParamLists); 19300b57cec5SDimitry Andric } 19310b57cec5SDimitry Andric } 19320b57cec5SDimitry Andric 19330b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 19340b57cec5SDimitry Andric // VarDecl Implementation 19350b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 19360b57cec5SDimitry Andric 19370b57cec5SDimitry Andric const char *VarDecl::getStorageClassSpecifierString(StorageClass SC) { 19380b57cec5SDimitry Andric switch (SC) { 19390b57cec5SDimitry Andric case SC_None: break; 19400b57cec5SDimitry Andric case SC_Auto: return "auto"; 19410b57cec5SDimitry Andric case SC_Extern: return "extern"; 19420b57cec5SDimitry Andric case SC_PrivateExtern: return "__private_extern__"; 19430b57cec5SDimitry Andric case SC_Register: return "register"; 19440b57cec5SDimitry Andric case SC_Static: return "static"; 19450b57cec5SDimitry Andric } 19460b57cec5SDimitry Andric 19470b57cec5SDimitry Andric llvm_unreachable("Invalid storage class"); 19480b57cec5SDimitry Andric } 19490b57cec5SDimitry Andric 19500b57cec5SDimitry Andric VarDecl::VarDecl(Kind DK, ASTContext &C, DeclContext *DC, 19510b57cec5SDimitry Andric SourceLocation StartLoc, SourceLocation IdLoc, 19520b57cec5SDimitry Andric IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo, 19530b57cec5SDimitry Andric StorageClass SC) 19540b57cec5SDimitry Andric : DeclaratorDecl(DK, DC, IdLoc, Id, T, TInfo, StartLoc), 19550b57cec5SDimitry Andric redeclarable_base(C) { 19560b57cec5SDimitry Andric static_assert(sizeof(VarDeclBitfields) <= sizeof(unsigned), 19570b57cec5SDimitry Andric "VarDeclBitfields too large!"); 19580b57cec5SDimitry Andric static_assert(sizeof(ParmVarDeclBitfields) <= sizeof(unsigned), 19590b57cec5SDimitry Andric "ParmVarDeclBitfields too large!"); 19600b57cec5SDimitry Andric static_assert(sizeof(NonParmVarDeclBitfields) <= sizeof(unsigned), 19610b57cec5SDimitry Andric "NonParmVarDeclBitfields too large!"); 19620b57cec5SDimitry Andric AllBits = 0; 19630b57cec5SDimitry Andric VarDeclBits.SClass = SC; 19640b57cec5SDimitry Andric // Everything else is implicitly initialized to false. 19650b57cec5SDimitry Andric } 19660b57cec5SDimitry Andric 19670b57cec5SDimitry Andric VarDecl *VarDecl::Create(ASTContext &C, DeclContext *DC, 19680b57cec5SDimitry Andric SourceLocation StartL, SourceLocation IdL, 19690b57cec5SDimitry Andric IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo, 19700b57cec5SDimitry Andric StorageClass S) { 19710b57cec5SDimitry Andric return new (C, DC) VarDecl(Var, C, DC, StartL, IdL, Id, T, TInfo, S); 19720b57cec5SDimitry Andric } 19730b57cec5SDimitry Andric 19740b57cec5SDimitry Andric VarDecl *VarDecl::CreateDeserialized(ASTContext &C, unsigned ID) { 19750b57cec5SDimitry Andric return new (C, ID) 19760b57cec5SDimitry Andric VarDecl(Var, C, nullptr, SourceLocation(), SourceLocation(), nullptr, 19770b57cec5SDimitry Andric QualType(), nullptr, SC_None); 19780b57cec5SDimitry Andric } 19790b57cec5SDimitry Andric 19800b57cec5SDimitry Andric void VarDecl::setStorageClass(StorageClass SC) { 19810b57cec5SDimitry Andric assert(isLegalForVariable(SC)); 19820b57cec5SDimitry Andric VarDeclBits.SClass = SC; 19830b57cec5SDimitry Andric } 19840b57cec5SDimitry Andric 19850b57cec5SDimitry Andric VarDecl::TLSKind VarDecl::getTLSKind() const { 19860b57cec5SDimitry Andric switch (VarDeclBits.TSCSpec) { 19870b57cec5SDimitry Andric case TSCS_unspecified: 19880b57cec5SDimitry Andric if (!hasAttr<ThreadAttr>() && 19890b57cec5SDimitry Andric !(getASTContext().getLangOpts().OpenMPUseTLS && 19900b57cec5SDimitry Andric getASTContext().getTargetInfo().isTLSSupported() && 19910b57cec5SDimitry Andric hasAttr<OMPThreadPrivateDeclAttr>())) 19920b57cec5SDimitry Andric return TLS_None; 19930b57cec5SDimitry Andric return ((getASTContext().getLangOpts().isCompatibleWithMSVC( 19940b57cec5SDimitry Andric LangOptions::MSVC2015)) || 19950b57cec5SDimitry Andric hasAttr<OMPThreadPrivateDeclAttr>()) 19960b57cec5SDimitry Andric ? TLS_Dynamic 19970b57cec5SDimitry Andric : TLS_Static; 19980b57cec5SDimitry Andric case TSCS___thread: // Fall through. 19990b57cec5SDimitry Andric case TSCS__Thread_local: 20000b57cec5SDimitry Andric return TLS_Static; 20010b57cec5SDimitry Andric case TSCS_thread_local: 20020b57cec5SDimitry Andric return TLS_Dynamic; 20030b57cec5SDimitry Andric } 20040b57cec5SDimitry Andric llvm_unreachable("Unknown thread storage class specifier!"); 20050b57cec5SDimitry Andric } 20060b57cec5SDimitry Andric 20070b57cec5SDimitry Andric SourceRange VarDecl::getSourceRange() const { 20080b57cec5SDimitry Andric if (const Expr *Init = getInit()) { 20090b57cec5SDimitry Andric SourceLocation InitEnd = Init->getEndLoc(); 20100b57cec5SDimitry Andric // If Init is implicit, ignore its source range and fallback on 20110b57cec5SDimitry Andric // DeclaratorDecl::getSourceRange() to handle postfix elements. 20120b57cec5SDimitry Andric if (InitEnd.isValid() && InitEnd != getLocation()) 20130b57cec5SDimitry Andric return SourceRange(getOuterLocStart(), InitEnd); 20140b57cec5SDimitry Andric } 20150b57cec5SDimitry Andric return DeclaratorDecl::getSourceRange(); 20160b57cec5SDimitry Andric } 20170b57cec5SDimitry Andric 20180b57cec5SDimitry Andric template<typename T> 20190b57cec5SDimitry Andric static LanguageLinkage getDeclLanguageLinkage(const T &D) { 20200b57cec5SDimitry Andric // C++ [dcl.link]p1: All function types, function names with external linkage, 20210b57cec5SDimitry Andric // and variable names with external linkage have a language linkage. 20220b57cec5SDimitry Andric if (!D.hasExternalFormalLinkage()) 20230b57cec5SDimitry Andric return NoLanguageLinkage; 20240b57cec5SDimitry Andric 20250b57cec5SDimitry Andric // Language linkage is a C++ concept, but saying that everything else in C has 20260b57cec5SDimitry Andric // C language linkage fits the implementation nicely. 20270b57cec5SDimitry Andric ASTContext &Context = D.getASTContext(); 20280b57cec5SDimitry Andric if (!Context.getLangOpts().CPlusPlus) 20290b57cec5SDimitry Andric return CLanguageLinkage; 20300b57cec5SDimitry Andric 20310b57cec5SDimitry Andric // C++ [dcl.link]p4: A C language linkage is ignored in determining the 20320b57cec5SDimitry Andric // language linkage of the names of class members and the function type of 20330b57cec5SDimitry Andric // class member functions. 20340b57cec5SDimitry Andric const DeclContext *DC = D.getDeclContext(); 20350b57cec5SDimitry Andric if (DC->isRecord()) 20360b57cec5SDimitry Andric return CXXLanguageLinkage; 20370b57cec5SDimitry Andric 20380b57cec5SDimitry Andric // If the first decl is in an extern "C" context, any other redeclaration 20390b57cec5SDimitry Andric // will have C language linkage. If the first one is not in an extern "C" 20400b57cec5SDimitry Andric // context, we would have reported an error for any other decl being in one. 20410b57cec5SDimitry Andric if (isFirstInExternCContext(&D)) 20420b57cec5SDimitry Andric return CLanguageLinkage; 20430b57cec5SDimitry Andric return CXXLanguageLinkage; 20440b57cec5SDimitry Andric } 20450b57cec5SDimitry Andric 20460b57cec5SDimitry Andric template<typename T> 20470b57cec5SDimitry Andric static bool isDeclExternC(const T &D) { 20480b57cec5SDimitry Andric // Since the context is ignored for class members, they can only have C++ 20490b57cec5SDimitry Andric // language linkage or no language linkage. 20500b57cec5SDimitry Andric const DeclContext *DC = D.getDeclContext(); 20510b57cec5SDimitry Andric if (DC->isRecord()) { 20520b57cec5SDimitry Andric assert(D.getASTContext().getLangOpts().CPlusPlus); 20530b57cec5SDimitry Andric return false; 20540b57cec5SDimitry Andric } 20550b57cec5SDimitry Andric 20560b57cec5SDimitry Andric return D.getLanguageLinkage() == CLanguageLinkage; 20570b57cec5SDimitry Andric } 20580b57cec5SDimitry Andric 20590b57cec5SDimitry Andric LanguageLinkage VarDecl::getLanguageLinkage() const { 20600b57cec5SDimitry Andric return getDeclLanguageLinkage(*this); 20610b57cec5SDimitry Andric } 20620b57cec5SDimitry Andric 20630b57cec5SDimitry Andric bool VarDecl::isExternC() const { 20640b57cec5SDimitry Andric return isDeclExternC(*this); 20650b57cec5SDimitry Andric } 20660b57cec5SDimitry Andric 20670b57cec5SDimitry Andric bool VarDecl::isInExternCContext() const { 20680b57cec5SDimitry Andric return getLexicalDeclContext()->isExternCContext(); 20690b57cec5SDimitry Andric } 20700b57cec5SDimitry Andric 20710b57cec5SDimitry Andric bool VarDecl::isInExternCXXContext() const { 20720b57cec5SDimitry Andric return getLexicalDeclContext()->isExternCXXContext(); 20730b57cec5SDimitry Andric } 20740b57cec5SDimitry Andric 20750b57cec5SDimitry Andric VarDecl *VarDecl::getCanonicalDecl() { return getFirstDecl(); } 20760b57cec5SDimitry Andric 20770b57cec5SDimitry Andric VarDecl::DefinitionKind 20780b57cec5SDimitry Andric VarDecl::isThisDeclarationADefinition(ASTContext &C) const { 20790b57cec5SDimitry Andric if (isThisDeclarationADemotedDefinition()) 20800b57cec5SDimitry Andric return DeclarationOnly; 20810b57cec5SDimitry Andric 20820b57cec5SDimitry Andric // C++ [basic.def]p2: 20830b57cec5SDimitry Andric // A declaration is a definition unless [...] it contains the 'extern' 20840b57cec5SDimitry Andric // specifier or a linkage-specification and neither an initializer [...], 20850b57cec5SDimitry Andric // it declares a non-inline static data member in a class declaration [...], 20860b57cec5SDimitry Andric // it declares a static data member outside a class definition and the variable 20870b57cec5SDimitry Andric // was defined within the class with the constexpr specifier [...], 20880b57cec5SDimitry Andric // C++1y [temp.expl.spec]p15: 20890b57cec5SDimitry Andric // An explicit specialization of a static data member or an explicit 20900b57cec5SDimitry Andric // specialization of a static data member template is a definition if the 20910b57cec5SDimitry Andric // declaration includes an initializer; otherwise, it is a declaration. 20920b57cec5SDimitry Andric // 20930b57cec5SDimitry Andric // FIXME: How do you declare (but not define) a partial specialization of 20940b57cec5SDimitry Andric // a static data member template outside the containing class? 20950b57cec5SDimitry Andric if (isStaticDataMember()) { 20960b57cec5SDimitry Andric if (isOutOfLine() && 20970b57cec5SDimitry Andric !(getCanonicalDecl()->isInline() && 20980b57cec5SDimitry Andric getCanonicalDecl()->isConstexpr()) && 20990b57cec5SDimitry Andric (hasInit() || 21000b57cec5SDimitry Andric // If the first declaration is out-of-line, this may be an 21010b57cec5SDimitry Andric // instantiation of an out-of-line partial specialization of a variable 21020b57cec5SDimitry Andric // template for which we have not yet instantiated the initializer. 21030b57cec5SDimitry Andric (getFirstDecl()->isOutOfLine() 21040b57cec5SDimitry Andric ? getTemplateSpecializationKind() == TSK_Undeclared 21050b57cec5SDimitry Andric : getTemplateSpecializationKind() != 21060b57cec5SDimitry Andric TSK_ExplicitSpecialization) || 21070b57cec5SDimitry Andric isa<VarTemplatePartialSpecializationDecl>(this))) 21080b57cec5SDimitry Andric return Definition; 21090b57cec5SDimitry Andric else if (!isOutOfLine() && isInline()) 21100b57cec5SDimitry Andric return Definition; 21110b57cec5SDimitry Andric else 21120b57cec5SDimitry Andric return DeclarationOnly; 21130b57cec5SDimitry Andric } 21140b57cec5SDimitry Andric // C99 6.7p5: 21150b57cec5SDimitry Andric // A definition of an identifier is a declaration for that identifier that 21160b57cec5SDimitry Andric // [...] causes storage to be reserved for that object. 21170b57cec5SDimitry Andric // Note: that applies for all non-file-scope objects. 21180b57cec5SDimitry Andric // C99 6.9.2p1: 21190b57cec5SDimitry Andric // If the declaration of an identifier for an object has file scope and an 21200b57cec5SDimitry Andric // initializer, the declaration is an external definition for the identifier 21210b57cec5SDimitry Andric if (hasInit()) 21220b57cec5SDimitry Andric return Definition; 21230b57cec5SDimitry Andric 21240b57cec5SDimitry Andric if (hasDefiningAttr()) 21250b57cec5SDimitry Andric return Definition; 21260b57cec5SDimitry Andric 21270b57cec5SDimitry Andric if (const auto *SAA = getAttr<SelectAnyAttr>()) 21280b57cec5SDimitry Andric if (!SAA->isInherited()) 21290b57cec5SDimitry Andric return Definition; 21300b57cec5SDimitry Andric 21310b57cec5SDimitry Andric // A variable template specialization (other than a static data member 21320b57cec5SDimitry Andric // template or an explicit specialization) is a declaration until we 21330b57cec5SDimitry Andric // instantiate its initializer. 21340b57cec5SDimitry Andric if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(this)) { 21350b57cec5SDimitry Andric if (VTSD->getTemplateSpecializationKind() != TSK_ExplicitSpecialization && 21360b57cec5SDimitry Andric !isa<VarTemplatePartialSpecializationDecl>(VTSD) && 21370b57cec5SDimitry Andric !VTSD->IsCompleteDefinition) 21380b57cec5SDimitry Andric return DeclarationOnly; 21390b57cec5SDimitry Andric } 21400b57cec5SDimitry Andric 21410b57cec5SDimitry Andric if (hasExternalStorage()) 21420b57cec5SDimitry Andric return DeclarationOnly; 21430b57cec5SDimitry Andric 21440b57cec5SDimitry Andric // [dcl.link] p7: 21450b57cec5SDimitry Andric // A declaration directly contained in a linkage-specification is treated 21460b57cec5SDimitry Andric // as if it contains the extern specifier for the purpose of determining 21470b57cec5SDimitry Andric // the linkage of the declared name and whether it is a definition. 21480b57cec5SDimitry Andric if (isSingleLineLanguageLinkage(*this)) 21490b57cec5SDimitry Andric return DeclarationOnly; 21500b57cec5SDimitry Andric 21510b57cec5SDimitry Andric // C99 6.9.2p2: 21520b57cec5SDimitry Andric // A declaration of an object that has file scope without an initializer, 21530b57cec5SDimitry Andric // and without a storage class specifier or the scs 'static', constitutes 21540b57cec5SDimitry Andric // a tentative definition. 21550b57cec5SDimitry Andric // No such thing in C++. 21560b57cec5SDimitry Andric if (!C.getLangOpts().CPlusPlus && isFileVarDecl()) 21570b57cec5SDimitry Andric return TentativeDefinition; 21580b57cec5SDimitry Andric 21590b57cec5SDimitry Andric // What's left is (in C, block-scope) declarations without initializers or 21600b57cec5SDimitry Andric // external storage. These are definitions. 21610b57cec5SDimitry Andric return Definition; 21620b57cec5SDimitry Andric } 21630b57cec5SDimitry Andric 21640b57cec5SDimitry Andric VarDecl *VarDecl::getActingDefinition() { 21650b57cec5SDimitry Andric DefinitionKind Kind = isThisDeclarationADefinition(); 21660b57cec5SDimitry Andric if (Kind != TentativeDefinition) 21670b57cec5SDimitry Andric return nullptr; 21680b57cec5SDimitry Andric 21690b57cec5SDimitry Andric VarDecl *LastTentative = nullptr; 21700b57cec5SDimitry Andric VarDecl *First = getFirstDecl(); 21710b57cec5SDimitry Andric for (auto I : First->redecls()) { 21720b57cec5SDimitry Andric Kind = I->isThisDeclarationADefinition(); 21730b57cec5SDimitry Andric if (Kind == Definition) 21740b57cec5SDimitry Andric return nullptr; 21750b57cec5SDimitry Andric else if (Kind == TentativeDefinition) 21760b57cec5SDimitry Andric LastTentative = I; 21770b57cec5SDimitry Andric } 21780b57cec5SDimitry Andric return LastTentative; 21790b57cec5SDimitry Andric } 21800b57cec5SDimitry Andric 21810b57cec5SDimitry Andric VarDecl *VarDecl::getDefinition(ASTContext &C) { 21820b57cec5SDimitry Andric VarDecl *First = getFirstDecl(); 21830b57cec5SDimitry Andric for (auto I : First->redecls()) { 21840b57cec5SDimitry Andric if (I->isThisDeclarationADefinition(C) == Definition) 21850b57cec5SDimitry Andric return I; 21860b57cec5SDimitry Andric } 21870b57cec5SDimitry Andric return nullptr; 21880b57cec5SDimitry Andric } 21890b57cec5SDimitry Andric 21900b57cec5SDimitry Andric VarDecl::DefinitionKind VarDecl::hasDefinition(ASTContext &C) const { 21910b57cec5SDimitry Andric DefinitionKind Kind = DeclarationOnly; 21920b57cec5SDimitry Andric 21930b57cec5SDimitry Andric const VarDecl *First = getFirstDecl(); 21940b57cec5SDimitry Andric for (auto I : First->redecls()) { 21950b57cec5SDimitry Andric Kind = std::max(Kind, I->isThisDeclarationADefinition(C)); 21960b57cec5SDimitry Andric if (Kind == Definition) 21970b57cec5SDimitry Andric break; 21980b57cec5SDimitry Andric } 21990b57cec5SDimitry Andric 22000b57cec5SDimitry Andric return Kind; 22010b57cec5SDimitry Andric } 22020b57cec5SDimitry Andric 22030b57cec5SDimitry Andric const Expr *VarDecl::getAnyInitializer(const VarDecl *&D) const { 22040b57cec5SDimitry Andric for (auto I : redecls()) { 22050b57cec5SDimitry Andric if (auto Expr = I->getInit()) { 22060b57cec5SDimitry Andric D = I; 22070b57cec5SDimitry Andric return Expr; 22080b57cec5SDimitry Andric } 22090b57cec5SDimitry Andric } 22100b57cec5SDimitry Andric return nullptr; 22110b57cec5SDimitry Andric } 22120b57cec5SDimitry Andric 22130b57cec5SDimitry Andric bool VarDecl::hasInit() const { 22140b57cec5SDimitry Andric if (auto *P = dyn_cast<ParmVarDecl>(this)) 22150b57cec5SDimitry Andric if (P->hasUnparsedDefaultArg() || P->hasUninstantiatedDefaultArg()) 22160b57cec5SDimitry Andric return false; 22170b57cec5SDimitry Andric 22180b57cec5SDimitry Andric return !Init.isNull(); 22190b57cec5SDimitry Andric } 22200b57cec5SDimitry Andric 22210b57cec5SDimitry Andric Expr *VarDecl::getInit() { 22220b57cec5SDimitry Andric if (!hasInit()) 22230b57cec5SDimitry Andric return nullptr; 22240b57cec5SDimitry Andric 22250b57cec5SDimitry Andric if (auto *S = Init.dyn_cast<Stmt *>()) 22260b57cec5SDimitry Andric return cast<Expr>(S); 22270b57cec5SDimitry Andric 22280b57cec5SDimitry Andric return cast_or_null<Expr>(Init.get<EvaluatedStmt *>()->Value); 22290b57cec5SDimitry Andric } 22300b57cec5SDimitry Andric 22310b57cec5SDimitry Andric Stmt **VarDecl::getInitAddress() { 22320b57cec5SDimitry Andric if (auto *ES = Init.dyn_cast<EvaluatedStmt *>()) 22330b57cec5SDimitry Andric return &ES->Value; 22340b57cec5SDimitry Andric 22350b57cec5SDimitry Andric return Init.getAddrOfPtr1(); 22360b57cec5SDimitry Andric } 22370b57cec5SDimitry Andric 2238a7dea167SDimitry Andric VarDecl *VarDecl::getInitializingDeclaration() { 2239a7dea167SDimitry Andric VarDecl *Def = nullptr; 2240a7dea167SDimitry Andric for (auto I : redecls()) { 2241a7dea167SDimitry Andric if (I->hasInit()) 2242a7dea167SDimitry Andric return I; 2243a7dea167SDimitry Andric 2244a7dea167SDimitry Andric if (I->isThisDeclarationADefinition()) { 2245a7dea167SDimitry Andric if (isStaticDataMember()) 2246a7dea167SDimitry Andric return I; 2247a7dea167SDimitry Andric else 2248a7dea167SDimitry Andric Def = I; 2249a7dea167SDimitry Andric } 2250a7dea167SDimitry Andric } 2251a7dea167SDimitry Andric return Def; 2252a7dea167SDimitry Andric } 2253a7dea167SDimitry Andric 22540b57cec5SDimitry Andric bool VarDecl::isOutOfLine() const { 22550b57cec5SDimitry Andric if (Decl::isOutOfLine()) 22560b57cec5SDimitry Andric return true; 22570b57cec5SDimitry Andric 22580b57cec5SDimitry Andric if (!isStaticDataMember()) 22590b57cec5SDimitry Andric return false; 22600b57cec5SDimitry Andric 22610b57cec5SDimitry Andric // If this static data member was instantiated from a static data member of 22620b57cec5SDimitry Andric // a class template, check whether that static data member was defined 22630b57cec5SDimitry Andric // out-of-line. 22640b57cec5SDimitry Andric if (VarDecl *VD = getInstantiatedFromStaticDataMember()) 22650b57cec5SDimitry Andric return VD->isOutOfLine(); 22660b57cec5SDimitry Andric 22670b57cec5SDimitry Andric return false; 22680b57cec5SDimitry Andric } 22690b57cec5SDimitry Andric 22700b57cec5SDimitry Andric void VarDecl::setInit(Expr *I) { 22710b57cec5SDimitry Andric if (auto *Eval = Init.dyn_cast<EvaluatedStmt *>()) { 22720b57cec5SDimitry Andric Eval->~EvaluatedStmt(); 22730b57cec5SDimitry Andric getASTContext().Deallocate(Eval); 22740b57cec5SDimitry Andric } 22750b57cec5SDimitry Andric 22760b57cec5SDimitry Andric Init = I; 22770b57cec5SDimitry Andric } 22780b57cec5SDimitry Andric 22790b57cec5SDimitry Andric bool VarDecl::mightBeUsableInConstantExpressions(ASTContext &C) const { 22800b57cec5SDimitry Andric const LangOptions &Lang = C.getLangOpts(); 22810b57cec5SDimitry Andric 22820b57cec5SDimitry Andric if (!Lang.CPlusPlus) 22830b57cec5SDimitry Andric return false; 22840b57cec5SDimitry Andric 22850b57cec5SDimitry Andric // Function parameters are never usable in constant expressions. 22860b57cec5SDimitry Andric if (isa<ParmVarDecl>(this)) 22870b57cec5SDimitry Andric return false; 22880b57cec5SDimitry Andric 22890b57cec5SDimitry Andric // In C++11, any variable of reference type can be used in a constant 22900b57cec5SDimitry Andric // expression if it is initialized by a constant expression. 22910b57cec5SDimitry Andric if (Lang.CPlusPlus11 && getType()->isReferenceType()) 22920b57cec5SDimitry Andric return true; 22930b57cec5SDimitry Andric 22940b57cec5SDimitry Andric // Only const objects can be used in constant expressions in C++. C++98 does 22950b57cec5SDimitry Andric // not require the variable to be non-volatile, but we consider this to be a 22960b57cec5SDimitry Andric // defect. 22970b57cec5SDimitry Andric if (!getType().isConstQualified() || getType().isVolatileQualified()) 22980b57cec5SDimitry Andric return false; 22990b57cec5SDimitry Andric 23000b57cec5SDimitry Andric // In C++, const, non-volatile variables of integral or enumeration types 23010b57cec5SDimitry Andric // can be used in constant expressions. 23020b57cec5SDimitry Andric if (getType()->isIntegralOrEnumerationType()) 23030b57cec5SDimitry Andric return true; 23040b57cec5SDimitry Andric 23050b57cec5SDimitry Andric // Additionally, in C++11, non-volatile constexpr variables can be used in 23060b57cec5SDimitry Andric // constant expressions. 23070b57cec5SDimitry Andric return Lang.CPlusPlus11 && isConstexpr(); 23080b57cec5SDimitry Andric } 23090b57cec5SDimitry Andric 23100b57cec5SDimitry Andric bool VarDecl::isUsableInConstantExpressions(ASTContext &Context) const { 23110b57cec5SDimitry Andric // C++2a [expr.const]p3: 23120b57cec5SDimitry Andric // A variable is usable in constant expressions after its initializing 23130b57cec5SDimitry Andric // declaration is encountered... 23140b57cec5SDimitry Andric const VarDecl *DefVD = nullptr; 23150b57cec5SDimitry Andric const Expr *Init = getAnyInitializer(DefVD); 23160b57cec5SDimitry Andric if (!Init || Init->isValueDependent() || getType()->isDependentType()) 23170b57cec5SDimitry Andric return false; 23180b57cec5SDimitry Andric // ... if it is a constexpr variable, or it is of reference type or of 23190b57cec5SDimitry Andric // const-qualified integral or enumeration type, ... 23200b57cec5SDimitry Andric if (!DefVD->mightBeUsableInConstantExpressions(Context)) 23210b57cec5SDimitry Andric return false; 23220b57cec5SDimitry Andric // ... and its initializer is a constant initializer. 23230b57cec5SDimitry Andric return DefVD->checkInitIsICE(); 23240b57cec5SDimitry Andric } 23250b57cec5SDimitry Andric 23260b57cec5SDimitry Andric /// Convert the initializer for this declaration to the elaborated EvaluatedStmt 23270b57cec5SDimitry Andric /// form, which contains extra information on the evaluated value of the 23280b57cec5SDimitry Andric /// initializer. 23290b57cec5SDimitry Andric EvaluatedStmt *VarDecl::ensureEvaluatedStmt() const { 23300b57cec5SDimitry Andric auto *Eval = Init.dyn_cast<EvaluatedStmt *>(); 23310b57cec5SDimitry Andric if (!Eval) { 23320b57cec5SDimitry Andric // Note: EvaluatedStmt contains an APValue, which usually holds 23330b57cec5SDimitry Andric // resources not allocated from the ASTContext. We need to do some 23340b57cec5SDimitry Andric // work to avoid leaking those, but we do so in VarDecl::evaluateValue 23350b57cec5SDimitry Andric // where we can detect whether there's anything to clean up or not. 23360b57cec5SDimitry Andric Eval = new (getASTContext()) EvaluatedStmt; 23370b57cec5SDimitry Andric Eval->Value = Init.get<Stmt *>(); 23380b57cec5SDimitry Andric Init = Eval; 23390b57cec5SDimitry Andric } 23400b57cec5SDimitry Andric return Eval; 23410b57cec5SDimitry Andric } 23420b57cec5SDimitry Andric 23430b57cec5SDimitry Andric APValue *VarDecl::evaluateValue() const { 23440b57cec5SDimitry Andric SmallVector<PartialDiagnosticAt, 8> Notes; 23450b57cec5SDimitry Andric return evaluateValue(Notes); 23460b57cec5SDimitry Andric } 23470b57cec5SDimitry Andric 23480b57cec5SDimitry Andric APValue *VarDecl::evaluateValue( 23490b57cec5SDimitry Andric SmallVectorImpl<PartialDiagnosticAt> &Notes) const { 23500b57cec5SDimitry Andric EvaluatedStmt *Eval = ensureEvaluatedStmt(); 23510b57cec5SDimitry Andric 23520b57cec5SDimitry Andric // We only produce notes indicating why an initializer is non-constant the 23530b57cec5SDimitry Andric // first time it is evaluated. FIXME: The notes won't always be emitted the 23540b57cec5SDimitry Andric // first time we try evaluation, so might not be produced at all. 23550b57cec5SDimitry Andric if (Eval->WasEvaluated) 23560b57cec5SDimitry Andric return Eval->Evaluated.isAbsent() ? nullptr : &Eval->Evaluated; 23570b57cec5SDimitry Andric 23580b57cec5SDimitry Andric const auto *Init = cast<Expr>(Eval->Value); 23590b57cec5SDimitry Andric assert(!Init->isValueDependent()); 23600b57cec5SDimitry Andric 23610b57cec5SDimitry Andric if (Eval->IsEvaluating) { 23620b57cec5SDimitry Andric // FIXME: Produce a diagnostic for self-initialization. 23630b57cec5SDimitry Andric Eval->CheckedICE = true; 23640b57cec5SDimitry Andric Eval->IsICE = false; 23650b57cec5SDimitry Andric return nullptr; 23660b57cec5SDimitry Andric } 23670b57cec5SDimitry Andric 23680b57cec5SDimitry Andric Eval->IsEvaluating = true; 23690b57cec5SDimitry Andric 23700b57cec5SDimitry Andric bool Result = Init->EvaluateAsInitializer(Eval->Evaluated, getASTContext(), 23710b57cec5SDimitry Andric this, Notes); 23720b57cec5SDimitry Andric 23730b57cec5SDimitry Andric // Ensure the computed APValue is cleaned up later if evaluation succeeded, 23740b57cec5SDimitry Andric // or that it's empty (so that there's nothing to clean up) if evaluation 23750b57cec5SDimitry Andric // failed. 23760b57cec5SDimitry Andric if (!Result) 23770b57cec5SDimitry Andric Eval->Evaluated = APValue(); 23780b57cec5SDimitry Andric else if (Eval->Evaluated.needsCleanup()) 23790b57cec5SDimitry Andric getASTContext().addDestruction(&Eval->Evaluated); 23800b57cec5SDimitry Andric 23810b57cec5SDimitry Andric Eval->IsEvaluating = false; 23820b57cec5SDimitry Andric Eval->WasEvaluated = true; 23830b57cec5SDimitry Andric 23840b57cec5SDimitry Andric // In C++11, we have determined whether the initializer was a constant 23850b57cec5SDimitry Andric // expression as a side-effect. 23860b57cec5SDimitry Andric if (getASTContext().getLangOpts().CPlusPlus11 && !Eval->CheckedICE) { 23870b57cec5SDimitry Andric Eval->CheckedICE = true; 23880b57cec5SDimitry Andric Eval->IsICE = Result && Notes.empty(); 23890b57cec5SDimitry Andric } 23900b57cec5SDimitry Andric 23910b57cec5SDimitry Andric return Result ? &Eval->Evaluated : nullptr; 23920b57cec5SDimitry Andric } 23930b57cec5SDimitry Andric 23940b57cec5SDimitry Andric APValue *VarDecl::getEvaluatedValue() const { 23950b57cec5SDimitry Andric if (EvaluatedStmt *Eval = Init.dyn_cast<EvaluatedStmt *>()) 23960b57cec5SDimitry Andric if (Eval->WasEvaluated) 23970b57cec5SDimitry Andric return &Eval->Evaluated; 23980b57cec5SDimitry Andric 23990b57cec5SDimitry Andric return nullptr; 24000b57cec5SDimitry Andric } 24010b57cec5SDimitry Andric 24020b57cec5SDimitry Andric bool VarDecl::isInitKnownICE() const { 24030b57cec5SDimitry Andric if (EvaluatedStmt *Eval = Init.dyn_cast<EvaluatedStmt *>()) 24040b57cec5SDimitry Andric return Eval->CheckedICE; 24050b57cec5SDimitry Andric 24060b57cec5SDimitry Andric return false; 24070b57cec5SDimitry Andric } 24080b57cec5SDimitry Andric 24090b57cec5SDimitry Andric bool VarDecl::isInitICE() const { 24100b57cec5SDimitry Andric assert(isInitKnownICE() && 24110b57cec5SDimitry Andric "Check whether we already know that the initializer is an ICE"); 24120b57cec5SDimitry Andric return Init.get<EvaluatedStmt *>()->IsICE; 24130b57cec5SDimitry Andric } 24140b57cec5SDimitry Andric 24150b57cec5SDimitry Andric bool VarDecl::checkInitIsICE() const { 24160b57cec5SDimitry Andric // Initializers of weak variables are never ICEs. 24170b57cec5SDimitry Andric if (isWeak()) 24180b57cec5SDimitry Andric return false; 24190b57cec5SDimitry Andric 24200b57cec5SDimitry Andric EvaluatedStmt *Eval = ensureEvaluatedStmt(); 24210b57cec5SDimitry Andric if (Eval->CheckedICE) 24220b57cec5SDimitry Andric // We have already checked whether this subexpression is an 24230b57cec5SDimitry Andric // integral constant expression. 24240b57cec5SDimitry Andric return Eval->IsICE; 24250b57cec5SDimitry Andric 24260b57cec5SDimitry Andric const auto *Init = cast<Expr>(Eval->Value); 24270b57cec5SDimitry Andric assert(!Init->isValueDependent()); 24280b57cec5SDimitry Andric 24290b57cec5SDimitry Andric // In C++11, evaluate the initializer to check whether it's a constant 24300b57cec5SDimitry Andric // expression. 24310b57cec5SDimitry Andric if (getASTContext().getLangOpts().CPlusPlus11) { 24320b57cec5SDimitry Andric SmallVector<PartialDiagnosticAt, 8> Notes; 24330b57cec5SDimitry Andric evaluateValue(Notes); 24340b57cec5SDimitry Andric return Eval->IsICE; 24350b57cec5SDimitry Andric } 24360b57cec5SDimitry Andric 24370b57cec5SDimitry Andric // It's an ICE whether or not the definition we found is 24380b57cec5SDimitry Andric // out-of-line. See DR 721 and the discussion in Clang PR 24390b57cec5SDimitry Andric // 6206 for details. 24400b57cec5SDimitry Andric 24410b57cec5SDimitry Andric if (Eval->CheckingICE) 24420b57cec5SDimitry Andric return false; 24430b57cec5SDimitry Andric Eval->CheckingICE = true; 24440b57cec5SDimitry Andric 24450b57cec5SDimitry Andric Eval->IsICE = Init->isIntegerConstantExpr(getASTContext()); 24460b57cec5SDimitry Andric Eval->CheckingICE = false; 24470b57cec5SDimitry Andric Eval->CheckedICE = true; 24480b57cec5SDimitry Andric return Eval->IsICE; 24490b57cec5SDimitry Andric } 24500b57cec5SDimitry Andric 24510b57cec5SDimitry Andric bool VarDecl::isParameterPack() const { 24520b57cec5SDimitry Andric return isa<PackExpansionType>(getType()); 24530b57cec5SDimitry Andric } 24540b57cec5SDimitry Andric 24550b57cec5SDimitry Andric template<typename DeclT> 24560b57cec5SDimitry Andric static DeclT *getDefinitionOrSelf(DeclT *D) { 24570b57cec5SDimitry Andric assert(D); 24580b57cec5SDimitry Andric if (auto *Def = D->getDefinition()) 24590b57cec5SDimitry Andric return Def; 24600b57cec5SDimitry Andric return D; 24610b57cec5SDimitry Andric } 24620b57cec5SDimitry Andric 24630b57cec5SDimitry Andric bool VarDecl::isEscapingByref() const { 24640b57cec5SDimitry Andric return hasAttr<BlocksAttr>() && NonParmVarDeclBits.EscapingByref; 24650b57cec5SDimitry Andric } 24660b57cec5SDimitry Andric 24670b57cec5SDimitry Andric bool VarDecl::isNonEscapingByref() const { 24680b57cec5SDimitry Andric return hasAttr<BlocksAttr>() && !NonParmVarDeclBits.EscapingByref; 24690b57cec5SDimitry Andric } 24700b57cec5SDimitry Andric 24710b57cec5SDimitry Andric VarDecl *VarDecl::getTemplateInstantiationPattern() const { 24720b57cec5SDimitry Andric const VarDecl *VD = this; 24730b57cec5SDimitry Andric 24740b57cec5SDimitry Andric // If this is an instantiated member, walk back to the template from which 24750b57cec5SDimitry Andric // it was instantiated. 24760b57cec5SDimitry Andric if (MemberSpecializationInfo *MSInfo = VD->getMemberSpecializationInfo()) { 24770b57cec5SDimitry Andric if (isTemplateInstantiation(MSInfo->getTemplateSpecializationKind())) { 24780b57cec5SDimitry Andric VD = VD->getInstantiatedFromStaticDataMember(); 24790b57cec5SDimitry Andric while (auto *NewVD = VD->getInstantiatedFromStaticDataMember()) 24800b57cec5SDimitry Andric VD = NewVD; 24810b57cec5SDimitry Andric } 24820b57cec5SDimitry Andric } 24830b57cec5SDimitry Andric 24840b57cec5SDimitry Andric // If it's an instantiated variable template specialization, find the 24850b57cec5SDimitry Andric // template or partial specialization from which it was instantiated. 24860b57cec5SDimitry Andric if (auto *VDTemplSpec = dyn_cast<VarTemplateSpecializationDecl>(VD)) { 24870b57cec5SDimitry Andric if (isTemplateInstantiation(VDTemplSpec->getTemplateSpecializationKind())) { 24880b57cec5SDimitry Andric auto From = VDTemplSpec->getInstantiatedFrom(); 24890b57cec5SDimitry Andric if (auto *VTD = From.dyn_cast<VarTemplateDecl *>()) { 24900b57cec5SDimitry Andric while (!VTD->isMemberSpecialization()) { 24910b57cec5SDimitry Andric auto *NewVTD = VTD->getInstantiatedFromMemberTemplate(); 24920b57cec5SDimitry Andric if (!NewVTD) 24930b57cec5SDimitry Andric break; 24940b57cec5SDimitry Andric VTD = NewVTD; 24950b57cec5SDimitry Andric } 24960b57cec5SDimitry Andric return getDefinitionOrSelf(VTD->getTemplatedDecl()); 24970b57cec5SDimitry Andric } 24980b57cec5SDimitry Andric if (auto *VTPSD = 24990b57cec5SDimitry Andric From.dyn_cast<VarTemplatePartialSpecializationDecl *>()) { 25000b57cec5SDimitry Andric while (!VTPSD->isMemberSpecialization()) { 25010b57cec5SDimitry Andric auto *NewVTPSD = VTPSD->getInstantiatedFromMember(); 25020b57cec5SDimitry Andric if (!NewVTPSD) 25030b57cec5SDimitry Andric break; 25040b57cec5SDimitry Andric VTPSD = NewVTPSD; 25050b57cec5SDimitry Andric } 25060b57cec5SDimitry Andric return getDefinitionOrSelf<VarDecl>(VTPSD); 25070b57cec5SDimitry Andric } 25080b57cec5SDimitry Andric } 25090b57cec5SDimitry Andric } 25100b57cec5SDimitry Andric 25110b57cec5SDimitry Andric // If this is the pattern of a variable template, find where it was 25120b57cec5SDimitry Andric // instantiated from. FIXME: Is this necessary? 25130b57cec5SDimitry Andric if (VarTemplateDecl *VarTemplate = VD->getDescribedVarTemplate()) { 25140b57cec5SDimitry Andric while (!VarTemplate->isMemberSpecialization()) { 25150b57cec5SDimitry Andric auto *NewVT = VarTemplate->getInstantiatedFromMemberTemplate(); 25160b57cec5SDimitry Andric if (!NewVT) 25170b57cec5SDimitry Andric break; 25180b57cec5SDimitry Andric VarTemplate = NewVT; 25190b57cec5SDimitry Andric } 25200b57cec5SDimitry Andric 25210b57cec5SDimitry Andric return getDefinitionOrSelf(VarTemplate->getTemplatedDecl()); 25220b57cec5SDimitry Andric } 25230b57cec5SDimitry Andric 25240b57cec5SDimitry Andric if (VD == this) 25250b57cec5SDimitry Andric return nullptr; 25260b57cec5SDimitry Andric return getDefinitionOrSelf(const_cast<VarDecl*>(VD)); 25270b57cec5SDimitry Andric } 25280b57cec5SDimitry Andric 25290b57cec5SDimitry Andric VarDecl *VarDecl::getInstantiatedFromStaticDataMember() const { 25300b57cec5SDimitry Andric if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) 25310b57cec5SDimitry Andric return cast<VarDecl>(MSI->getInstantiatedFrom()); 25320b57cec5SDimitry Andric 25330b57cec5SDimitry Andric return nullptr; 25340b57cec5SDimitry Andric } 25350b57cec5SDimitry Andric 25360b57cec5SDimitry Andric TemplateSpecializationKind VarDecl::getTemplateSpecializationKind() const { 25370b57cec5SDimitry Andric if (const auto *Spec = dyn_cast<VarTemplateSpecializationDecl>(this)) 25380b57cec5SDimitry Andric return Spec->getSpecializationKind(); 25390b57cec5SDimitry Andric 25400b57cec5SDimitry Andric if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) 25410b57cec5SDimitry Andric return MSI->getTemplateSpecializationKind(); 25420b57cec5SDimitry Andric 25430b57cec5SDimitry Andric return TSK_Undeclared; 25440b57cec5SDimitry Andric } 25450b57cec5SDimitry Andric 25460b57cec5SDimitry Andric TemplateSpecializationKind 25470b57cec5SDimitry Andric VarDecl::getTemplateSpecializationKindForInstantiation() const { 25480b57cec5SDimitry Andric if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) 25490b57cec5SDimitry Andric return MSI->getTemplateSpecializationKind(); 25500b57cec5SDimitry Andric 25510b57cec5SDimitry Andric if (const auto *Spec = dyn_cast<VarTemplateSpecializationDecl>(this)) 25520b57cec5SDimitry Andric return Spec->getSpecializationKind(); 25530b57cec5SDimitry Andric 25540b57cec5SDimitry Andric return TSK_Undeclared; 25550b57cec5SDimitry Andric } 25560b57cec5SDimitry Andric 25570b57cec5SDimitry Andric SourceLocation VarDecl::getPointOfInstantiation() const { 25580b57cec5SDimitry Andric if (const auto *Spec = dyn_cast<VarTemplateSpecializationDecl>(this)) 25590b57cec5SDimitry Andric return Spec->getPointOfInstantiation(); 25600b57cec5SDimitry Andric 25610b57cec5SDimitry Andric if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) 25620b57cec5SDimitry Andric return MSI->getPointOfInstantiation(); 25630b57cec5SDimitry Andric 25640b57cec5SDimitry Andric return SourceLocation(); 25650b57cec5SDimitry Andric } 25660b57cec5SDimitry Andric 25670b57cec5SDimitry Andric VarTemplateDecl *VarDecl::getDescribedVarTemplate() const { 25680b57cec5SDimitry Andric return getASTContext().getTemplateOrSpecializationInfo(this) 25690b57cec5SDimitry Andric .dyn_cast<VarTemplateDecl *>(); 25700b57cec5SDimitry Andric } 25710b57cec5SDimitry Andric 25720b57cec5SDimitry Andric void VarDecl::setDescribedVarTemplate(VarTemplateDecl *Template) { 25730b57cec5SDimitry Andric getASTContext().setTemplateOrSpecializationInfo(this, Template); 25740b57cec5SDimitry Andric } 25750b57cec5SDimitry Andric 25760b57cec5SDimitry Andric bool VarDecl::isKnownToBeDefined() const { 25770b57cec5SDimitry Andric const auto &LangOpts = getASTContext().getLangOpts(); 25780b57cec5SDimitry Andric // In CUDA mode without relocatable device code, variables of form 'extern 25790b57cec5SDimitry Andric // __shared__ Foo foo[]' are pointers to the base of the GPU core's shared 25800b57cec5SDimitry Andric // memory pool. These are never undefined variables, even if they appear 25810b57cec5SDimitry Andric // inside of an anon namespace or static function. 25820b57cec5SDimitry Andric // 25830b57cec5SDimitry Andric // With CUDA relocatable device code enabled, these variables don't get 25840b57cec5SDimitry Andric // special handling; they're treated like regular extern variables. 25850b57cec5SDimitry Andric if (LangOpts.CUDA && !LangOpts.GPURelocatableDeviceCode && 25860b57cec5SDimitry Andric hasExternalStorage() && hasAttr<CUDASharedAttr>() && 25870b57cec5SDimitry Andric isa<IncompleteArrayType>(getType())) 25880b57cec5SDimitry Andric return true; 25890b57cec5SDimitry Andric 25900b57cec5SDimitry Andric return hasDefinition(); 25910b57cec5SDimitry Andric } 25920b57cec5SDimitry Andric 25930b57cec5SDimitry Andric bool VarDecl::isNoDestroy(const ASTContext &Ctx) const { 25940b57cec5SDimitry Andric return hasGlobalStorage() && (hasAttr<NoDestroyAttr>() || 25950b57cec5SDimitry Andric (!Ctx.getLangOpts().RegisterStaticDestructors && 25960b57cec5SDimitry Andric !hasAttr<AlwaysDestroyAttr>())); 25970b57cec5SDimitry Andric } 25980b57cec5SDimitry Andric 2599a7dea167SDimitry Andric QualType::DestructionKind 2600a7dea167SDimitry Andric VarDecl::needsDestruction(const ASTContext &Ctx) const { 2601a7dea167SDimitry Andric if (EvaluatedStmt *Eval = Init.dyn_cast<EvaluatedStmt *>()) 2602a7dea167SDimitry Andric if (Eval->HasConstantDestruction) 2603a7dea167SDimitry Andric return QualType::DK_none; 2604a7dea167SDimitry Andric 2605a7dea167SDimitry Andric if (isNoDestroy(Ctx)) 2606a7dea167SDimitry Andric return QualType::DK_none; 2607a7dea167SDimitry Andric 2608a7dea167SDimitry Andric return getType().isDestructedType(); 2609a7dea167SDimitry Andric } 2610a7dea167SDimitry Andric 26110b57cec5SDimitry Andric MemberSpecializationInfo *VarDecl::getMemberSpecializationInfo() const { 26120b57cec5SDimitry Andric if (isStaticDataMember()) 26130b57cec5SDimitry Andric // FIXME: Remove ? 26140b57cec5SDimitry Andric // return getASTContext().getInstantiatedFromStaticDataMember(this); 26150b57cec5SDimitry Andric return getASTContext().getTemplateOrSpecializationInfo(this) 26160b57cec5SDimitry Andric .dyn_cast<MemberSpecializationInfo *>(); 26170b57cec5SDimitry Andric return nullptr; 26180b57cec5SDimitry Andric } 26190b57cec5SDimitry Andric 26200b57cec5SDimitry Andric void VarDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK, 26210b57cec5SDimitry Andric SourceLocation PointOfInstantiation) { 26220b57cec5SDimitry Andric assert((isa<VarTemplateSpecializationDecl>(this) || 26230b57cec5SDimitry Andric getMemberSpecializationInfo()) && 26240b57cec5SDimitry Andric "not a variable or static data member template specialization"); 26250b57cec5SDimitry Andric 26260b57cec5SDimitry Andric if (VarTemplateSpecializationDecl *Spec = 26270b57cec5SDimitry Andric dyn_cast<VarTemplateSpecializationDecl>(this)) { 26280b57cec5SDimitry Andric Spec->setSpecializationKind(TSK); 26290b57cec5SDimitry Andric if (TSK != TSK_ExplicitSpecialization && 26300b57cec5SDimitry Andric PointOfInstantiation.isValid() && 26310b57cec5SDimitry Andric Spec->getPointOfInstantiation().isInvalid()) { 26320b57cec5SDimitry Andric Spec->setPointOfInstantiation(PointOfInstantiation); 26330b57cec5SDimitry Andric if (ASTMutationListener *L = getASTContext().getASTMutationListener()) 26340b57cec5SDimitry Andric L->InstantiationRequested(this); 26350b57cec5SDimitry Andric } 26360b57cec5SDimitry Andric } else if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) { 26370b57cec5SDimitry Andric MSI->setTemplateSpecializationKind(TSK); 26380b57cec5SDimitry Andric if (TSK != TSK_ExplicitSpecialization && PointOfInstantiation.isValid() && 26390b57cec5SDimitry Andric MSI->getPointOfInstantiation().isInvalid()) { 26400b57cec5SDimitry Andric MSI->setPointOfInstantiation(PointOfInstantiation); 26410b57cec5SDimitry Andric if (ASTMutationListener *L = getASTContext().getASTMutationListener()) 26420b57cec5SDimitry Andric L->InstantiationRequested(this); 26430b57cec5SDimitry Andric } 26440b57cec5SDimitry Andric } 26450b57cec5SDimitry Andric } 26460b57cec5SDimitry Andric 26470b57cec5SDimitry Andric void 26480b57cec5SDimitry Andric VarDecl::setInstantiationOfStaticDataMember(VarDecl *VD, 26490b57cec5SDimitry Andric TemplateSpecializationKind TSK) { 26500b57cec5SDimitry Andric assert(getASTContext().getTemplateOrSpecializationInfo(this).isNull() && 26510b57cec5SDimitry Andric "Previous template or instantiation?"); 26520b57cec5SDimitry Andric getASTContext().setInstantiatedFromStaticDataMember(this, VD, TSK); 26530b57cec5SDimitry Andric } 26540b57cec5SDimitry Andric 26550b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 26560b57cec5SDimitry Andric // ParmVarDecl Implementation 26570b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 26580b57cec5SDimitry Andric 26590b57cec5SDimitry Andric ParmVarDecl *ParmVarDecl::Create(ASTContext &C, DeclContext *DC, 26600b57cec5SDimitry Andric SourceLocation StartLoc, 26610b57cec5SDimitry Andric SourceLocation IdLoc, IdentifierInfo *Id, 26620b57cec5SDimitry Andric QualType T, TypeSourceInfo *TInfo, 26630b57cec5SDimitry Andric StorageClass S, Expr *DefArg) { 26640b57cec5SDimitry Andric return new (C, DC) ParmVarDecl(ParmVar, C, DC, StartLoc, IdLoc, Id, T, TInfo, 26650b57cec5SDimitry Andric S, DefArg); 26660b57cec5SDimitry Andric } 26670b57cec5SDimitry Andric 26680b57cec5SDimitry Andric QualType ParmVarDecl::getOriginalType() const { 26690b57cec5SDimitry Andric TypeSourceInfo *TSI = getTypeSourceInfo(); 26700b57cec5SDimitry Andric QualType T = TSI ? TSI->getType() : getType(); 26710b57cec5SDimitry Andric if (const auto *DT = dyn_cast<DecayedType>(T)) 26720b57cec5SDimitry Andric return DT->getOriginalType(); 26730b57cec5SDimitry Andric return T; 26740b57cec5SDimitry Andric } 26750b57cec5SDimitry Andric 26760b57cec5SDimitry Andric ParmVarDecl *ParmVarDecl::CreateDeserialized(ASTContext &C, unsigned ID) { 26770b57cec5SDimitry Andric return new (C, ID) 26780b57cec5SDimitry Andric ParmVarDecl(ParmVar, C, nullptr, SourceLocation(), SourceLocation(), 26790b57cec5SDimitry Andric nullptr, QualType(), nullptr, SC_None, nullptr); 26800b57cec5SDimitry Andric } 26810b57cec5SDimitry Andric 26820b57cec5SDimitry Andric SourceRange ParmVarDecl::getSourceRange() const { 26830b57cec5SDimitry Andric if (!hasInheritedDefaultArg()) { 26840b57cec5SDimitry Andric SourceRange ArgRange = getDefaultArgRange(); 26850b57cec5SDimitry Andric if (ArgRange.isValid()) 26860b57cec5SDimitry Andric return SourceRange(getOuterLocStart(), ArgRange.getEnd()); 26870b57cec5SDimitry Andric } 26880b57cec5SDimitry Andric 26890b57cec5SDimitry Andric // DeclaratorDecl considers the range of postfix types as overlapping with the 26900b57cec5SDimitry Andric // declaration name, but this is not the case with parameters in ObjC methods. 26910b57cec5SDimitry Andric if (isa<ObjCMethodDecl>(getDeclContext())) 26920b57cec5SDimitry Andric return SourceRange(DeclaratorDecl::getBeginLoc(), getLocation()); 26930b57cec5SDimitry Andric 26940b57cec5SDimitry Andric return DeclaratorDecl::getSourceRange(); 26950b57cec5SDimitry Andric } 26960b57cec5SDimitry Andric 26970b57cec5SDimitry Andric Expr *ParmVarDecl::getDefaultArg() { 26980b57cec5SDimitry Andric assert(!hasUnparsedDefaultArg() && "Default argument is not yet parsed!"); 26990b57cec5SDimitry Andric assert(!hasUninstantiatedDefaultArg() && 27000b57cec5SDimitry Andric "Default argument is not yet instantiated!"); 27010b57cec5SDimitry Andric 27020b57cec5SDimitry Andric Expr *Arg = getInit(); 27030b57cec5SDimitry Andric if (auto *E = dyn_cast_or_null<FullExpr>(Arg)) 27040b57cec5SDimitry Andric return E->getSubExpr(); 27050b57cec5SDimitry Andric 27060b57cec5SDimitry Andric return Arg; 27070b57cec5SDimitry Andric } 27080b57cec5SDimitry Andric 27090b57cec5SDimitry Andric void ParmVarDecl::setDefaultArg(Expr *defarg) { 27100b57cec5SDimitry Andric ParmVarDeclBits.DefaultArgKind = DAK_Normal; 27110b57cec5SDimitry Andric Init = defarg; 27120b57cec5SDimitry Andric } 27130b57cec5SDimitry Andric 27140b57cec5SDimitry Andric SourceRange ParmVarDecl::getDefaultArgRange() const { 27150b57cec5SDimitry Andric switch (ParmVarDeclBits.DefaultArgKind) { 27160b57cec5SDimitry Andric case DAK_None: 27170b57cec5SDimitry Andric case DAK_Unparsed: 27180b57cec5SDimitry Andric // Nothing we can do here. 27190b57cec5SDimitry Andric return SourceRange(); 27200b57cec5SDimitry Andric 27210b57cec5SDimitry Andric case DAK_Uninstantiated: 27220b57cec5SDimitry Andric return getUninstantiatedDefaultArg()->getSourceRange(); 27230b57cec5SDimitry Andric 27240b57cec5SDimitry Andric case DAK_Normal: 27250b57cec5SDimitry Andric if (const Expr *E = getInit()) 27260b57cec5SDimitry Andric return E->getSourceRange(); 27270b57cec5SDimitry Andric 27280b57cec5SDimitry Andric // Missing an actual expression, may be invalid. 27290b57cec5SDimitry Andric return SourceRange(); 27300b57cec5SDimitry Andric } 27310b57cec5SDimitry Andric llvm_unreachable("Invalid default argument kind."); 27320b57cec5SDimitry Andric } 27330b57cec5SDimitry Andric 27340b57cec5SDimitry Andric void ParmVarDecl::setUninstantiatedDefaultArg(Expr *arg) { 27350b57cec5SDimitry Andric ParmVarDeclBits.DefaultArgKind = DAK_Uninstantiated; 27360b57cec5SDimitry Andric Init = arg; 27370b57cec5SDimitry Andric } 27380b57cec5SDimitry Andric 27390b57cec5SDimitry Andric Expr *ParmVarDecl::getUninstantiatedDefaultArg() { 27400b57cec5SDimitry Andric assert(hasUninstantiatedDefaultArg() && 27410b57cec5SDimitry Andric "Wrong kind of initialization expression!"); 27420b57cec5SDimitry Andric return cast_or_null<Expr>(Init.get<Stmt *>()); 27430b57cec5SDimitry Andric } 27440b57cec5SDimitry Andric 27450b57cec5SDimitry Andric bool ParmVarDecl::hasDefaultArg() const { 27460b57cec5SDimitry Andric // FIXME: We should just return false for DAK_None here once callers are 27470b57cec5SDimitry Andric // prepared for the case that we encountered an invalid default argument and 27480b57cec5SDimitry Andric // were unable to even build an invalid expression. 27490b57cec5SDimitry Andric return hasUnparsedDefaultArg() || hasUninstantiatedDefaultArg() || 27500b57cec5SDimitry Andric !Init.isNull(); 27510b57cec5SDimitry Andric } 27520b57cec5SDimitry Andric 27530b57cec5SDimitry Andric void ParmVarDecl::setParameterIndexLarge(unsigned parameterIndex) { 27540b57cec5SDimitry Andric getASTContext().setParameterIndex(this, parameterIndex); 27550b57cec5SDimitry Andric ParmVarDeclBits.ParameterIndex = ParameterIndexSentinel; 27560b57cec5SDimitry Andric } 27570b57cec5SDimitry Andric 27580b57cec5SDimitry Andric unsigned ParmVarDecl::getParameterIndexLarge() const { 27590b57cec5SDimitry Andric return getASTContext().getParameterIndex(this); 27600b57cec5SDimitry Andric } 27610b57cec5SDimitry Andric 27620b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 27630b57cec5SDimitry Andric // FunctionDecl Implementation 27640b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 27650b57cec5SDimitry Andric 27660b57cec5SDimitry Andric FunctionDecl::FunctionDecl(Kind DK, ASTContext &C, DeclContext *DC, 27670b57cec5SDimitry Andric SourceLocation StartLoc, 27680b57cec5SDimitry Andric const DeclarationNameInfo &NameInfo, QualType T, 27690b57cec5SDimitry Andric TypeSourceInfo *TInfo, StorageClass S, 27700b57cec5SDimitry Andric bool isInlineSpecified, 2771480093f4SDimitry Andric ConstexprSpecKind ConstexprKind, 2772480093f4SDimitry Andric Expr *TrailingRequiresClause) 27730b57cec5SDimitry Andric : DeclaratorDecl(DK, DC, NameInfo.getLoc(), NameInfo.getName(), T, TInfo, 27740b57cec5SDimitry Andric StartLoc), 2775480093f4SDimitry Andric DeclContext(DK), redeclarable_base(C), Body(), ODRHash(0), 27760b57cec5SDimitry Andric EndRangeLoc(NameInfo.getEndLoc()), DNLoc(NameInfo.getInfo()) { 27770b57cec5SDimitry Andric assert(T.isNull() || T->isFunctionType()); 27780b57cec5SDimitry Andric FunctionDeclBits.SClass = S; 27790b57cec5SDimitry Andric FunctionDeclBits.IsInline = isInlineSpecified; 27800b57cec5SDimitry Andric FunctionDeclBits.IsInlineSpecified = isInlineSpecified; 27810b57cec5SDimitry Andric FunctionDeclBits.IsVirtualAsWritten = false; 27820b57cec5SDimitry Andric FunctionDeclBits.IsPure = false; 27830b57cec5SDimitry Andric FunctionDeclBits.HasInheritedPrototype = false; 27840b57cec5SDimitry Andric FunctionDeclBits.HasWrittenPrototype = true; 27850b57cec5SDimitry Andric FunctionDeclBits.IsDeleted = false; 27860b57cec5SDimitry Andric FunctionDeclBits.IsTrivial = false; 27870b57cec5SDimitry Andric FunctionDeclBits.IsTrivialForCall = false; 27880b57cec5SDimitry Andric FunctionDeclBits.IsDefaulted = false; 27890b57cec5SDimitry Andric FunctionDeclBits.IsExplicitlyDefaulted = false; 2790480093f4SDimitry Andric FunctionDeclBits.HasDefaultedFunctionInfo = false; 27910b57cec5SDimitry Andric FunctionDeclBits.HasImplicitReturnZero = false; 27920b57cec5SDimitry Andric FunctionDeclBits.IsLateTemplateParsed = false; 27930b57cec5SDimitry Andric FunctionDeclBits.ConstexprKind = ConstexprKind; 27940b57cec5SDimitry Andric FunctionDeclBits.InstantiationIsPending = false; 27950b57cec5SDimitry Andric FunctionDeclBits.UsesSEHTry = false; 2796480093f4SDimitry Andric FunctionDeclBits.UsesFPIntrin = false; 27970b57cec5SDimitry Andric FunctionDeclBits.HasSkippedBody = false; 27980b57cec5SDimitry Andric FunctionDeclBits.WillHaveBody = false; 27990b57cec5SDimitry Andric FunctionDeclBits.IsMultiVersion = false; 28000b57cec5SDimitry Andric FunctionDeclBits.IsCopyDeductionCandidate = false; 28010b57cec5SDimitry Andric FunctionDeclBits.HasODRHash = false; 2802480093f4SDimitry Andric if (TrailingRequiresClause) 2803480093f4SDimitry Andric setTrailingRequiresClause(TrailingRequiresClause); 28040b57cec5SDimitry Andric } 28050b57cec5SDimitry Andric 28060b57cec5SDimitry Andric void FunctionDecl::getNameForDiagnostic( 28070b57cec5SDimitry Andric raw_ostream &OS, const PrintingPolicy &Policy, bool Qualified) const { 28080b57cec5SDimitry Andric NamedDecl::getNameForDiagnostic(OS, Policy, Qualified); 28090b57cec5SDimitry Andric const TemplateArgumentList *TemplateArgs = getTemplateSpecializationArgs(); 28100b57cec5SDimitry Andric if (TemplateArgs) 28110b57cec5SDimitry Andric printTemplateArgumentList(OS, TemplateArgs->asArray(), Policy); 28120b57cec5SDimitry Andric } 28130b57cec5SDimitry Andric 28140b57cec5SDimitry Andric bool FunctionDecl::isVariadic() const { 28150b57cec5SDimitry Andric if (const auto *FT = getType()->getAs<FunctionProtoType>()) 28160b57cec5SDimitry Andric return FT->isVariadic(); 28170b57cec5SDimitry Andric return false; 28180b57cec5SDimitry Andric } 28190b57cec5SDimitry Andric 2820480093f4SDimitry Andric FunctionDecl::DefaultedFunctionInfo * 2821480093f4SDimitry Andric FunctionDecl::DefaultedFunctionInfo::Create(ASTContext &Context, 2822480093f4SDimitry Andric ArrayRef<DeclAccessPair> Lookups) { 2823480093f4SDimitry Andric DefaultedFunctionInfo *Info = new (Context.Allocate( 2824480093f4SDimitry Andric totalSizeToAlloc<DeclAccessPair>(Lookups.size()), 2825480093f4SDimitry Andric std::max(alignof(DefaultedFunctionInfo), alignof(DeclAccessPair)))) 2826480093f4SDimitry Andric DefaultedFunctionInfo; 2827480093f4SDimitry Andric Info->NumLookups = Lookups.size(); 2828480093f4SDimitry Andric std::uninitialized_copy(Lookups.begin(), Lookups.end(), 2829480093f4SDimitry Andric Info->getTrailingObjects<DeclAccessPair>()); 2830480093f4SDimitry Andric return Info; 2831480093f4SDimitry Andric } 2832480093f4SDimitry Andric 2833480093f4SDimitry Andric void FunctionDecl::setDefaultedFunctionInfo(DefaultedFunctionInfo *Info) { 2834480093f4SDimitry Andric assert(!FunctionDeclBits.HasDefaultedFunctionInfo && "already have this"); 2835480093f4SDimitry Andric assert(!Body && "can't replace function body with defaulted function info"); 2836480093f4SDimitry Andric 2837480093f4SDimitry Andric FunctionDeclBits.HasDefaultedFunctionInfo = true; 2838480093f4SDimitry Andric DefaultedInfo = Info; 2839480093f4SDimitry Andric } 2840480093f4SDimitry Andric 2841480093f4SDimitry Andric FunctionDecl::DefaultedFunctionInfo * 2842480093f4SDimitry Andric FunctionDecl::getDefaultedFunctionInfo() const { 2843480093f4SDimitry Andric return FunctionDeclBits.HasDefaultedFunctionInfo ? DefaultedInfo : nullptr; 2844480093f4SDimitry Andric } 2845480093f4SDimitry Andric 28460b57cec5SDimitry Andric bool FunctionDecl::hasBody(const FunctionDecl *&Definition) const { 28470b57cec5SDimitry Andric for (auto I : redecls()) { 28480b57cec5SDimitry Andric if (I->doesThisDeclarationHaveABody()) { 28490b57cec5SDimitry Andric Definition = I; 28500b57cec5SDimitry Andric return true; 28510b57cec5SDimitry Andric } 28520b57cec5SDimitry Andric } 28530b57cec5SDimitry Andric 28540b57cec5SDimitry Andric return false; 28550b57cec5SDimitry Andric } 28560b57cec5SDimitry Andric 2857480093f4SDimitry Andric bool FunctionDecl::hasTrivialBody() const { 28580b57cec5SDimitry Andric Stmt *S = getBody(); 28590b57cec5SDimitry Andric if (!S) { 28600b57cec5SDimitry Andric // Since we don't have a body for this function, we don't know if it's 28610b57cec5SDimitry Andric // trivial or not. 28620b57cec5SDimitry Andric return false; 28630b57cec5SDimitry Andric } 28640b57cec5SDimitry Andric 28650b57cec5SDimitry Andric if (isa<CompoundStmt>(S) && cast<CompoundStmt>(S)->body_empty()) 28660b57cec5SDimitry Andric return true; 28670b57cec5SDimitry Andric return false; 28680b57cec5SDimitry Andric } 28690b57cec5SDimitry Andric 28700b57cec5SDimitry Andric bool FunctionDecl::isDefined(const FunctionDecl *&Definition) const { 28710b57cec5SDimitry Andric for (auto I : redecls()) { 28720b57cec5SDimitry Andric if (I->isThisDeclarationADefinition()) { 28730b57cec5SDimitry Andric Definition = I; 28740b57cec5SDimitry Andric return true; 28750b57cec5SDimitry Andric } 28760b57cec5SDimitry Andric } 28770b57cec5SDimitry Andric 28780b57cec5SDimitry Andric return false; 28790b57cec5SDimitry Andric } 28800b57cec5SDimitry Andric 28810b57cec5SDimitry Andric Stmt *FunctionDecl::getBody(const FunctionDecl *&Definition) const { 28820b57cec5SDimitry Andric if (!hasBody(Definition)) 28830b57cec5SDimitry Andric return nullptr; 28840b57cec5SDimitry Andric 2885480093f4SDimitry Andric assert(!Definition->FunctionDeclBits.HasDefaultedFunctionInfo && 2886480093f4SDimitry Andric "definition should not have a body"); 28870b57cec5SDimitry Andric if (Definition->Body) 28880b57cec5SDimitry Andric return Definition->Body.get(getASTContext().getExternalSource()); 28890b57cec5SDimitry Andric 28900b57cec5SDimitry Andric return nullptr; 28910b57cec5SDimitry Andric } 28920b57cec5SDimitry Andric 28930b57cec5SDimitry Andric void FunctionDecl::setBody(Stmt *B) { 2894480093f4SDimitry Andric FunctionDeclBits.HasDefaultedFunctionInfo = false; 2895480093f4SDimitry Andric Body = LazyDeclStmtPtr(B); 28960b57cec5SDimitry Andric if (B) 28970b57cec5SDimitry Andric EndRangeLoc = B->getEndLoc(); 28980b57cec5SDimitry Andric } 28990b57cec5SDimitry Andric 29000b57cec5SDimitry Andric void FunctionDecl::setPure(bool P) { 29010b57cec5SDimitry Andric FunctionDeclBits.IsPure = P; 29020b57cec5SDimitry Andric if (P) 29030b57cec5SDimitry Andric if (auto *Parent = dyn_cast<CXXRecordDecl>(getDeclContext())) 29040b57cec5SDimitry Andric Parent->markedVirtualFunctionPure(); 29050b57cec5SDimitry Andric } 29060b57cec5SDimitry Andric 29070b57cec5SDimitry Andric template<std::size_t Len> 29080b57cec5SDimitry Andric static bool isNamed(const NamedDecl *ND, const char (&Str)[Len]) { 29090b57cec5SDimitry Andric IdentifierInfo *II = ND->getIdentifier(); 29100b57cec5SDimitry Andric return II && II->isStr(Str); 29110b57cec5SDimitry Andric } 29120b57cec5SDimitry Andric 29130b57cec5SDimitry Andric bool FunctionDecl::isMain() const { 29140b57cec5SDimitry Andric const TranslationUnitDecl *tunit = 29150b57cec5SDimitry Andric dyn_cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext()); 29160b57cec5SDimitry Andric return tunit && 29170b57cec5SDimitry Andric !tunit->getASTContext().getLangOpts().Freestanding && 29180b57cec5SDimitry Andric isNamed(this, "main"); 29190b57cec5SDimitry Andric } 29200b57cec5SDimitry Andric 29210b57cec5SDimitry Andric bool FunctionDecl::isMSVCRTEntryPoint() const { 29220b57cec5SDimitry Andric const TranslationUnitDecl *TUnit = 29230b57cec5SDimitry Andric dyn_cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext()); 29240b57cec5SDimitry Andric if (!TUnit) 29250b57cec5SDimitry Andric return false; 29260b57cec5SDimitry Andric 29270b57cec5SDimitry Andric // Even though we aren't really targeting MSVCRT if we are freestanding, 29280b57cec5SDimitry Andric // semantic analysis for these functions remains the same. 29290b57cec5SDimitry Andric 29300b57cec5SDimitry Andric // MSVCRT entry points only exist on MSVCRT targets. 29310b57cec5SDimitry Andric if (!TUnit->getASTContext().getTargetInfo().getTriple().isOSMSVCRT()) 29320b57cec5SDimitry Andric return false; 29330b57cec5SDimitry Andric 29340b57cec5SDimitry Andric // Nameless functions like constructors cannot be entry points. 29350b57cec5SDimitry Andric if (!getIdentifier()) 29360b57cec5SDimitry Andric return false; 29370b57cec5SDimitry Andric 29380b57cec5SDimitry Andric return llvm::StringSwitch<bool>(getName()) 29390b57cec5SDimitry Andric .Cases("main", // an ANSI console app 29400b57cec5SDimitry Andric "wmain", // a Unicode console App 29410b57cec5SDimitry Andric "WinMain", // an ANSI GUI app 29420b57cec5SDimitry Andric "wWinMain", // a Unicode GUI app 29430b57cec5SDimitry Andric "DllMain", // a DLL 29440b57cec5SDimitry Andric true) 29450b57cec5SDimitry Andric .Default(false); 29460b57cec5SDimitry Andric } 29470b57cec5SDimitry Andric 29480b57cec5SDimitry Andric bool FunctionDecl::isReservedGlobalPlacementOperator() const { 29490b57cec5SDimitry Andric assert(getDeclName().getNameKind() == DeclarationName::CXXOperatorName); 29500b57cec5SDimitry Andric assert(getDeclName().getCXXOverloadedOperator() == OO_New || 29510b57cec5SDimitry Andric getDeclName().getCXXOverloadedOperator() == OO_Delete || 29520b57cec5SDimitry Andric getDeclName().getCXXOverloadedOperator() == OO_Array_New || 29530b57cec5SDimitry Andric getDeclName().getCXXOverloadedOperator() == OO_Array_Delete); 29540b57cec5SDimitry Andric 29550b57cec5SDimitry Andric if (!getDeclContext()->getRedeclContext()->isTranslationUnit()) 29560b57cec5SDimitry Andric return false; 29570b57cec5SDimitry Andric 29580b57cec5SDimitry Andric const auto *proto = getType()->castAs<FunctionProtoType>(); 29590b57cec5SDimitry Andric if (proto->getNumParams() != 2 || proto->isVariadic()) 29600b57cec5SDimitry Andric return false; 29610b57cec5SDimitry Andric 29620b57cec5SDimitry Andric ASTContext &Context = 29630b57cec5SDimitry Andric cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext()) 29640b57cec5SDimitry Andric ->getASTContext(); 29650b57cec5SDimitry Andric 29660b57cec5SDimitry Andric // The result type and first argument type are constant across all 29670b57cec5SDimitry Andric // these operators. The second argument must be exactly void*. 29680b57cec5SDimitry Andric return (proto->getParamType(1).getCanonicalType() == Context.VoidPtrTy); 29690b57cec5SDimitry Andric } 29700b57cec5SDimitry Andric 29715ffd83dbSDimitry Andric bool FunctionDecl::isReplaceableGlobalAllocationFunction( 29725ffd83dbSDimitry Andric Optional<unsigned> *AlignmentParam, bool *IsNothrow) const { 29730b57cec5SDimitry Andric if (getDeclName().getNameKind() != DeclarationName::CXXOperatorName) 29740b57cec5SDimitry Andric return false; 29750b57cec5SDimitry Andric if (getDeclName().getCXXOverloadedOperator() != OO_New && 29760b57cec5SDimitry Andric getDeclName().getCXXOverloadedOperator() != OO_Delete && 29770b57cec5SDimitry Andric getDeclName().getCXXOverloadedOperator() != OO_Array_New && 29780b57cec5SDimitry Andric getDeclName().getCXXOverloadedOperator() != OO_Array_Delete) 29790b57cec5SDimitry Andric return false; 29800b57cec5SDimitry Andric 29810b57cec5SDimitry Andric if (isa<CXXRecordDecl>(getDeclContext())) 29820b57cec5SDimitry Andric return false; 29830b57cec5SDimitry Andric 29840b57cec5SDimitry Andric // This can only fail for an invalid 'operator new' declaration. 29850b57cec5SDimitry Andric if (!getDeclContext()->getRedeclContext()->isTranslationUnit()) 29860b57cec5SDimitry Andric return false; 29870b57cec5SDimitry Andric 29880b57cec5SDimitry Andric const auto *FPT = getType()->castAs<FunctionProtoType>(); 29890b57cec5SDimitry Andric if (FPT->getNumParams() == 0 || FPT->getNumParams() > 3 || FPT->isVariadic()) 29900b57cec5SDimitry Andric return false; 29910b57cec5SDimitry Andric 29920b57cec5SDimitry Andric // If this is a single-parameter function, it must be a replaceable global 29930b57cec5SDimitry Andric // allocation or deallocation function. 29940b57cec5SDimitry Andric if (FPT->getNumParams() == 1) 29950b57cec5SDimitry Andric return true; 29960b57cec5SDimitry Andric 29970b57cec5SDimitry Andric unsigned Params = 1; 29980b57cec5SDimitry Andric QualType Ty = FPT->getParamType(Params); 29990b57cec5SDimitry Andric ASTContext &Ctx = getASTContext(); 30000b57cec5SDimitry Andric 30010b57cec5SDimitry Andric auto Consume = [&] { 30020b57cec5SDimitry Andric ++Params; 30030b57cec5SDimitry Andric Ty = Params < FPT->getNumParams() ? FPT->getParamType(Params) : QualType(); 30040b57cec5SDimitry Andric }; 30050b57cec5SDimitry Andric 30060b57cec5SDimitry Andric // In C++14, the next parameter can be a 'std::size_t' for sized delete. 30070b57cec5SDimitry Andric bool IsSizedDelete = false; 30080b57cec5SDimitry Andric if (Ctx.getLangOpts().SizedDeallocation && 30090b57cec5SDimitry Andric (getDeclName().getCXXOverloadedOperator() == OO_Delete || 30100b57cec5SDimitry Andric getDeclName().getCXXOverloadedOperator() == OO_Array_Delete) && 30110b57cec5SDimitry Andric Ctx.hasSameType(Ty, Ctx.getSizeType())) { 30120b57cec5SDimitry Andric IsSizedDelete = true; 30130b57cec5SDimitry Andric Consume(); 30140b57cec5SDimitry Andric } 30150b57cec5SDimitry Andric 30160b57cec5SDimitry Andric // In C++17, the next parameter can be a 'std::align_val_t' for aligned 30170b57cec5SDimitry Andric // new/delete. 30180b57cec5SDimitry Andric if (Ctx.getLangOpts().AlignedAllocation && !Ty.isNull() && Ty->isAlignValT()) { 30190b57cec5SDimitry Andric Consume(); 30205ffd83dbSDimitry Andric if (AlignmentParam) 30215ffd83dbSDimitry Andric *AlignmentParam = Params; 30220b57cec5SDimitry Andric } 30230b57cec5SDimitry Andric 30240b57cec5SDimitry Andric // Finally, if this is not a sized delete, the final parameter can 30250b57cec5SDimitry Andric // be a 'const std::nothrow_t&'. 30260b57cec5SDimitry Andric if (!IsSizedDelete && !Ty.isNull() && Ty->isReferenceType()) { 30270b57cec5SDimitry Andric Ty = Ty->getPointeeType(); 30280b57cec5SDimitry Andric if (Ty.getCVRQualifiers() != Qualifiers::Const) 30290b57cec5SDimitry Andric return false; 30305ffd83dbSDimitry Andric if (Ty->isNothrowT()) { 30315ffd83dbSDimitry Andric if (IsNothrow) 30325ffd83dbSDimitry Andric *IsNothrow = true; 30330b57cec5SDimitry Andric Consume(); 30340b57cec5SDimitry Andric } 30355ffd83dbSDimitry Andric } 30360b57cec5SDimitry Andric 30370b57cec5SDimitry Andric return Params == FPT->getNumParams(); 30380b57cec5SDimitry Andric } 30390b57cec5SDimitry Andric 3040480093f4SDimitry Andric bool FunctionDecl::isInlineBuiltinDeclaration() const { 3041480093f4SDimitry Andric if (!getBuiltinID()) 3042480093f4SDimitry Andric return false; 3043480093f4SDimitry Andric 3044480093f4SDimitry Andric const FunctionDecl *Definition; 3045480093f4SDimitry Andric return hasBody(Definition) && Definition->isInlineSpecified(); 3046480093f4SDimitry Andric } 3047480093f4SDimitry Andric 30480b57cec5SDimitry Andric bool FunctionDecl::isDestroyingOperatorDelete() const { 30490b57cec5SDimitry Andric // C++ P0722: 30500b57cec5SDimitry Andric // Within a class C, a single object deallocation function with signature 30510b57cec5SDimitry Andric // (T, std::destroying_delete_t, <more params>) 30520b57cec5SDimitry Andric // is a destroying operator delete. 30530b57cec5SDimitry Andric if (!isa<CXXMethodDecl>(this) || getOverloadedOperator() != OO_Delete || 30540b57cec5SDimitry Andric getNumParams() < 2) 30550b57cec5SDimitry Andric return false; 30560b57cec5SDimitry Andric 30570b57cec5SDimitry Andric auto *RD = getParamDecl(1)->getType()->getAsCXXRecordDecl(); 30580b57cec5SDimitry Andric return RD && RD->isInStdNamespace() && RD->getIdentifier() && 30590b57cec5SDimitry Andric RD->getIdentifier()->isStr("destroying_delete_t"); 30600b57cec5SDimitry Andric } 30610b57cec5SDimitry Andric 30620b57cec5SDimitry Andric LanguageLinkage FunctionDecl::getLanguageLinkage() const { 30630b57cec5SDimitry Andric return getDeclLanguageLinkage(*this); 30640b57cec5SDimitry Andric } 30650b57cec5SDimitry Andric 30660b57cec5SDimitry Andric bool FunctionDecl::isExternC() const { 30670b57cec5SDimitry Andric return isDeclExternC(*this); 30680b57cec5SDimitry Andric } 30690b57cec5SDimitry Andric 30700b57cec5SDimitry Andric bool FunctionDecl::isInExternCContext() const { 30710b57cec5SDimitry Andric if (hasAttr<OpenCLKernelAttr>()) 30720b57cec5SDimitry Andric return true; 30730b57cec5SDimitry Andric return getLexicalDeclContext()->isExternCContext(); 30740b57cec5SDimitry Andric } 30750b57cec5SDimitry Andric 30760b57cec5SDimitry Andric bool FunctionDecl::isInExternCXXContext() const { 30770b57cec5SDimitry Andric return getLexicalDeclContext()->isExternCXXContext(); 30780b57cec5SDimitry Andric } 30790b57cec5SDimitry Andric 30800b57cec5SDimitry Andric bool FunctionDecl::isGlobal() const { 30810b57cec5SDimitry Andric if (const auto *Method = dyn_cast<CXXMethodDecl>(this)) 30820b57cec5SDimitry Andric return Method->isStatic(); 30830b57cec5SDimitry Andric 30840b57cec5SDimitry Andric if (getCanonicalDecl()->getStorageClass() == SC_Static) 30850b57cec5SDimitry Andric return false; 30860b57cec5SDimitry Andric 30870b57cec5SDimitry Andric for (const DeclContext *DC = getDeclContext(); 30880b57cec5SDimitry Andric DC->isNamespace(); 30890b57cec5SDimitry Andric DC = DC->getParent()) { 30900b57cec5SDimitry Andric if (const auto *Namespace = cast<NamespaceDecl>(DC)) { 30910b57cec5SDimitry Andric if (!Namespace->getDeclName()) 30920b57cec5SDimitry Andric return false; 30930b57cec5SDimitry Andric break; 30940b57cec5SDimitry Andric } 30950b57cec5SDimitry Andric } 30960b57cec5SDimitry Andric 30970b57cec5SDimitry Andric return true; 30980b57cec5SDimitry Andric } 30990b57cec5SDimitry Andric 31000b57cec5SDimitry Andric bool FunctionDecl::isNoReturn() const { 31010b57cec5SDimitry Andric if (hasAttr<NoReturnAttr>() || hasAttr<CXX11NoReturnAttr>() || 31020b57cec5SDimitry Andric hasAttr<C11NoReturnAttr>()) 31030b57cec5SDimitry Andric return true; 31040b57cec5SDimitry Andric 31050b57cec5SDimitry Andric if (auto *FnTy = getType()->getAs<FunctionType>()) 31060b57cec5SDimitry Andric return FnTy->getNoReturnAttr(); 31070b57cec5SDimitry Andric 31080b57cec5SDimitry Andric return false; 31090b57cec5SDimitry Andric } 31100b57cec5SDimitry Andric 31110b57cec5SDimitry Andric 31120b57cec5SDimitry Andric MultiVersionKind FunctionDecl::getMultiVersionKind() const { 31130b57cec5SDimitry Andric if (hasAttr<TargetAttr>()) 31140b57cec5SDimitry Andric return MultiVersionKind::Target; 31150b57cec5SDimitry Andric if (hasAttr<CPUDispatchAttr>()) 31160b57cec5SDimitry Andric return MultiVersionKind::CPUDispatch; 31170b57cec5SDimitry Andric if (hasAttr<CPUSpecificAttr>()) 31180b57cec5SDimitry Andric return MultiVersionKind::CPUSpecific; 31190b57cec5SDimitry Andric return MultiVersionKind::None; 31200b57cec5SDimitry Andric } 31210b57cec5SDimitry Andric 31220b57cec5SDimitry Andric bool FunctionDecl::isCPUDispatchMultiVersion() const { 31230b57cec5SDimitry Andric return isMultiVersion() && hasAttr<CPUDispatchAttr>(); 31240b57cec5SDimitry Andric } 31250b57cec5SDimitry Andric 31260b57cec5SDimitry Andric bool FunctionDecl::isCPUSpecificMultiVersion() const { 31270b57cec5SDimitry Andric return isMultiVersion() && hasAttr<CPUSpecificAttr>(); 31280b57cec5SDimitry Andric } 31290b57cec5SDimitry Andric 31300b57cec5SDimitry Andric bool FunctionDecl::isTargetMultiVersion() const { 31310b57cec5SDimitry Andric return isMultiVersion() && hasAttr<TargetAttr>(); 31320b57cec5SDimitry Andric } 31330b57cec5SDimitry Andric 31340b57cec5SDimitry Andric void 31350b57cec5SDimitry Andric FunctionDecl::setPreviousDeclaration(FunctionDecl *PrevDecl) { 31360b57cec5SDimitry Andric redeclarable_base::setPreviousDecl(PrevDecl); 31370b57cec5SDimitry Andric 31380b57cec5SDimitry Andric if (FunctionTemplateDecl *FunTmpl = getDescribedFunctionTemplate()) { 31390b57cec5SDimitry Andric FunctionTemplateDecl *PrevFunTmpl 31400b57cec5SDimitry Andric = PrevDecl? PrevDecl->getDescribedFunctionTemplate() : nullptr; 31410b57cec5SDimitry Andric assert((!PrevDecl || PrevFunTmpl) && "Function/function template mismatch"); 31420b57cec5SDimitry Andric FunTmpl->setPreviousDecl(PrevFunTmpl); 31430b57cec5SDimitry Andric } 31440b57cec5SDimitry Andric 31450b57cec5SDimitry Andric if (PrevDecl && PrevDecl->isInlined()) 31460b57cec5SDimitry Andric setImplicitlyInline(true); 31470b57cec5SDimitry Andric } 31480b57cec5SDimitry Andric 31490b57cec5SDimitry Andric FunctionDecl *FunctionDecl::getCanonicalDecl() { return getFirstDecl(); } 31500b57cec5SDimitry Andric 31510b57cec5SDimitry Andric /// Returns a value indicating whether this function corresponds to a builtin 31520b57cec5SDimitry Andric /// function. 31530b57cec5SDimitry Andric /// 31540b57cec5SDimitry Andric /// The function corresponds to a built-in function if it is declared at 31550b57cec5SDimitry Andric /// translation scope or within an extern "C" block and its name matches with 31560b57cec5SDimitry Andric /// the name of a builtin. The returned value will be 0 for functions that do 31570b57cec5SDimitry Andric /// not correspond to a builtin, a value of type \c Builtin::ID if in the 31580b57cec5SDimitry Andric /// target-independent range \c [1,Builtin::First), or a target-specific builtin 31590b57cec5SDimitry Andric /// value. 31600b57cec5SDimitry Andric /// 31610b57cec5SDimitry Andric /// \param ConsiderWrapperFunctions If true, we should consider wrapper 31620b57cec5SDimitry Andric /// functions as their wrapped builtins. This shouldn't be done in general, but 31630b57cec5SDimitry Andric /// it's useful in Sema to diagnose calls to wrappers based on their semantics. 31640b57cec5SDimitry Andric unsigned FunctionDecl::getBuiltinID(bool ConsiderWrapperFunctions) const { 3165*927c847dSDimitry Andric unsigned BuiltinID = 0; 3166480093f4SDimitry Andric 31675ffd83dbSDimitry Andric if (const auto *ABAA = getAttr<ArmBuiltinAliasAttr>()) { 31685ffd83dbSDimitry Andric BuiltinID = ABAA->getBuiltinName()->getBuiltinID(); 3169*927c847dSDimitry Andric } else if (const auto *A = getAttr<BuiltinAttr>()) { 3170*927c847dSDimitry Andric BuiltinID = A->getID(); 3171480093f4SDimitry Andric } 3172480093f4SDimitry Andric 31730b57cec5SDimitry Andric if (!BuiltinID) 31740b57cec5SDimitry Andric return 0; 31750b57cec5SDimitry Andric 31760b57cec5SDimitry Andric // If the function is marked "overloadable", it has a different mangled name 31770b57cec5SDimitry Andric // and is not the C library function. 3178480093f4SDimitry Andric if (!ConsiderWrapperFunctions && hasAttr<OverloadableAttr>() && 31795ffd83dbSDimitry Andric !hasAttr<ArmBuiltinAliasAttr>()) 31800b57cec5SDimitry Andric return 0; 31810b57cec5SDimitry Andric 3182*927c847dSDimitry Andric ASTContext &Context = getASTContext(); 31830b57cec5SDimitry Andric if (!Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) 31840b57cec5SDimitry Andric return BuiltinID; 31850b57cec5SDimitry Andric 31860b57cec5SDimitry Andric // This function has the name of a known C library 31870b57cec5SDimitry Andric // function. Determine whether it actually refers to the C library 31880b57cec5SDimitry Andric // function or whether it just has the same name. 31890b57cec5SDimitry Andric 31900b57cec5SDimitry Andric // If this is a static function, it's not a builtin. 31910b57cec5SDimitry Andric if (!ConsiderWrapperFunctions && getStorageClass() == SC_Static) 31920b57cec5SDimitry Andric return 0; 31930b57cec5SDimitry Andric 31940b57cec5SDimitry Andric // OpenCL v1.2 s6.9.f - The library functions defined in 31950b57cec5SDimitry Andric // the C99 standard headers are not available. 31960b57cec5SDimitry Andric if (Context.getLangOpts().OpenCL && 31970b57cec5SDimitry Andric Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) 31980b57cec5SDimitry Andric return 0; 31990b57cec5SDimitry Andric 32000b57cec5SDimitry Andric // CUDA does not have device-side standard library. printf and malloc are the 32010b57cec5SDimitry Andric // only special cases that are supported by device-side runtime. 32020b57cec5SDimitry Andric if (Context.getLangOpts().CUDA && hasAttr<CUDADeviceAttr>() && 32030b57cec5SDimitry Andric !hasAttr<CUDAHostAttr>() && 32040b57cec5SDimitry Andric !(BuiltinID == Builtin::BIprintf || BuiltinID == Builtin::BImalloc)) 32050b57cec5SDimitry Andric return 0; 32060b57cec5SDimitry Andric 32075ffd83dbSDimitry Andric // As AMDGCN implementation of OpenMP does not have a device-side standard 32085ffd83dbSDimitry Andric // library, none of the predefined library functions except printf and malloc 32095ffd83dbSDimitry Andric // should be treated as a builtin i.e. 0 should be returned for them. 32105ffd83dbSDimitry Andric if (Context.getTargetInfo().getTriple().isAMDGCN() && 32115ffd83dbSDimitry Andric Context.getLangOpts().OpenMPIsDevice && 32125ffd83dbSDimitry Andric Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID) && 32135ffd83dbSDimitry Andric !(BuiltinID == Builtin::BIprintf || BuiltinID == Builtin::BImalloc)) 32145ffd83dbSDimitry Andric return 0; 32155ffd83dbSDimitry Andric 32160b57cec5SDimitry Andric return BuiltinID; 32170b57cec5SDimitry Andric } 32180b57cec5SDimitry Andric 32190b57cec5SDimitry Andric /// getNumParams - Return the number of parameters this function must have 32200b57cec5SDimitry Andric /// based on its FunctionType. This is the length of the ParamInfo array 32210b57cec5SDimitry Andric /// after it has been created. 32220b57cec5SDimitry Andric unsigned FunctionDecl::getNumParams() const { 32230b57cec5SDimitry Andric const auto *FPT = getType()->getAs<FunctionProtoType>(); 32240b57cec5SDimitry Andric return FPT ? FPT->getNumParams() : 0; 32250b57cec5SDimitry Andric } 32260b57cec5SDimitry Andric 32270b57cec5SDimitry Andric void FunctionDecl::setParams(ASTContext &C, 32280b57cec5SDimitry Andric ArrayRef<ParmVarDecl *> NewParamInfo) { 32290b57cec5SDimitry Andric assert(!ParamInfo && "Already has param info!"); 32300b57cec5SDimitry Andric assert(NewParamInfo.size() == getNumParams() && "Parameter count mismatch!"); 32310b57cec5SDimitry Andric 32320b57cec5SDimitry Andric // Zero params -> null pointer. 32330b57cec5SDimitry Andric if (!NewParamInfo.empty()) { 32340b57cec5SDimitry Andric ParamInfo = new (C) ParmVarDecl*[NewParamInfo.size()]; 32350b57cec5SDimitry Andric std::copy(NewParamInfo.begin(), NewParamInfo.end(), ParamInfo); 32360b57cec5SDimitry Andric } 32370b57cec5SDimitry Andric } 32380b57cec5SDimitry Andric 32390b57cec5SDimitry Andric /// getMinRequiredArguments - Returns the minimum number of arguments 32400b57cec5SDimitry Andric /// needed to call this function. This may be fewer than the number of 32410b57cec5SDimitry Andric /// function parameters, if some of the parameters have default 32420b57cec5SDimitry Andric /// arguments (in C++) or are parameter packs (C++11). 32430b57cec5SDimitry Andric unsigned FunctionDecl::getMinRequiredArguments() const { 32440b57cec5SDimitry Andric if (!getASTContext().getLangOpts().CPlusPlus) 32450b57cec5SDimitry Andric return getNumParams(); 32460b57cec5SDimitry Andric 32475ffd83dbSDimitry Andric // Note that it is possible for a parameter with no default argument to 32485ffd83dbSDimitry Andric // follow a parameter with a default argument. 32490b57cec5SDimitry Andric unsigned NumRequiredArgs = 0; 32505ffd83dbSDimitry Andric unsigned MinParamsSoFar = 0; 32515ffd83dbSDimitry Andric for (auto *Param : parameters()) { 32525ffd83dbSDimitry Andric if (!Param->isParameterPack()) { 32535ffd83dbSDimitry Andric ++MinParamsSoFar; 32545ffd83dbSDimitry Andric if (!Param->hasDefaultArg()) 32555ffd83dbSDimitry Andric NumRequiredArgs = MinParamsSoFar; 32565ffd83dbSDimitry Andric } 32575ffd83dbSDimitry Andric } 32580b57cec5SDimitry Andric return NumRequiredArgs; 32590b57cec5SDimitry Andric } 32600b57cec5SDimitry Andric 32615ffd83dbSDimitry Andric bool FunctionDecl::hasOneParamOrDefaultArgs() const { 32625ffd83dbSDimitry Andric return getNumParams() == 1 || 32635ffd83dbSDimitry Andric (getNumParams() > 1 && 32645ffd83dbSDimitry Andric std::all_of(param_begin() + 1, param_end(), 32655ffd83dbSDimitry Andric [](ParmVarDecl *P) { return P->hasDefaultArg(); })); 32665ffd83dbSDimitry Andric } 32675ffd83dbSDimitry Andric 32680b57cec5SDimitry Andric /// The combination of the extern and inline keywords under MSVC forces 32690b57cec5SDimitry Andric /// the function to be required. 32700b57cec5SDimitry Andric /// 32710b57cec5SDimitry Andric /// Note: This function assumes that we will only get called when isInlined() 32720b57cec5SDimitry Andric /// would return true for this FunctionDecl. 32730b57cec5SDimitry Andric bool FunctionDecl::isMSExternInline() const { 32740b57cec5SDimitry Andric assert(isInlined() && "expected to get called on an inlined function!"); 32750b57cec5SDimitry Andric 32760b57cec5SDimitry Andric const ASTContext &Context = getASTContext(); 32770b57cec5SDimitry Andric if (!Context.getTargetInfo().getCXXABI().isMicrosoft() && 32780b57cec5SDimitry Andric !hasAttr<DLLExportAttr>()) 32790b57cec5SDimitry Andric return false; 32800b57cec5SDimitry Andric 32810b57cec5SDimitry Andric for (const FunctionDecl *FD = getMostRecentDecl(); FD; 32820b57cec5SDimitry Andric FD = FD->getPreviousDecl()) 32830b57cec5SDimitry Andric if (!FD->isImplicit() && FD->getStorageClass() == SC_Extern) 32840b57cec5SDimitry Andric return true; 32850b57cec5SDimitry Andric 32860b57cec5SDimitry Andric return false; 32870b57cec5SDimitry Andric } 32880b57cec5SDimitry Andric 32890b57cec5SDimitry Andric static bool redeclForcesDefMSVC(const FunctionDecl *Redecl) { 32900b57cec5SDimitry Andric if (Redecl->getStorageClass() != SC_Extern) 32910b57cec5SDimitry Andric return false; 32920b57cec5SDimitry Andric 32930b57cec5SDimitry Andric for (const FunctionDecl *FD = Redecl->getPreviousDecl(); FD; 32940b57cec5SDimitry Andric FD = FD->getPreviousDecl()) 32950b57cec5SDimitry Andric if (!FD->isImplicit() && FD->getStorageClass() == SC_Extern) 32960b57cec5SDimitry Andric return false; 32970b57cec5SDimitry Andric 32980b57cec5SDimitry Andric return true; 32990b57cec5SDimitry Andric } 33000b57cec5SDimitry Andric 33010b57cec5SDimitry Andric static bool RedeclForcesDefC99(const FunctionDecl *Redecl) { 33020b57cec5SDimitry Andric // Only consider file-scope declarations in this test. 33030b57cec5SDimitry Andric if (!Redecl->getLexicalDeclContext()->isTranslationUnit()) 33040b57cec5SDimitry Andric return false; 33050b57cec5SDimitry Andric 33060b57cec5SDimitry Andric // Only consider explicit declarations; the presence of a builtin for a 33070b57cec5SDimitry Andric // libcall shouldn't affect whether a definition is externally visible. 33080b57cec5SDimitry Andric if (Redecl->isImplicit()) 33090b57cec5SDimitry Andric return false; 33100b57cec5SDimitry Andric 33110b57cec5SDimitry Andric if (!Redecl->isInlineSpecified() || Redecl->getStorageClass() == SC_Extern) 33120b57cec5SDimitry Andric return true; // Not an inline definition 33130b57cec5SDimitry Andric 33140b57cec5SDimitry Andric return false; 33150b57cec5SDimitry Andric } 33160b57cec5SDimitry Andric 33170b57cec5SDimitry Andric /// For a function declaration in C or C++, determine whether this 33180b57cec5SDimitry Andric /// declaration causes the definition to be externally visible. 33190b57cec5SDimitry Andric /// 33200b57cec5SDimitry Andric /// For instance, this determines if adding the current declaration to the set 33210b57cec5SDimitry Andric /// of redeclarations of the given functions causes 33220b57cec5SDimitry Andric /// isInlineDefinitionExternallyVisible to change from false to true. 33230b57cec5SDimitry Andric bool FunctionDecl::doesDeclarationForceExternallyVisibleDefinition() const { 33240b57cec5SDimitry Andric assert(!doesThisDeclarationHaveABody() && 33250b57cec5SDimitry Andric "Must have a declaration without a body."); 33260b57cec5SDimitry Andric 33270b57cec5SDimitry Andric ASTContext &Context = getASTContext(); 33280b57cec5SDimitry Andric 33290b57cec5SDimitry Andric if (Context.getLangOpts().MSVCCompat) { 33300b57cec5SDimitry Andric const FunctionDecl *Definition; 33310b57cec5SDimitry Andric if (hasBody(Definition) && Definition->isInlined() && 33320b57cec5SDimitry Andric redeclForcesDefMSVC(this)) 33330b57cec5SDimitry Andric return true; 33340b57cec5SDimitry Andric } 33350b57cec5SDimitry Andric 3336a7dea167SDimitry Andric if (Context.getLangOpts().CPlusPlus) 3337a7dea167SDimitry Andric return false; 3338a7dea167SDimitry Andric 33390b57cec5SDimitry Andric if (Context.getLangOpts().GNUInline || hasAttr<GNUInlineAttr>()) { 33400b57cec5SDimitry Andric // With GNU inlining, a declaration with 'inline' but not 'extern', forces 33410b57cec5SDimitry Andric // an externally visible definition. 33420b57cec5SDimitry Andric // 33430b57cec5SDimitry Andric // FIXME: What happens if gnu_inline gets added on after the first 33440b57cec5SDimitry Andric // declaration? 33450b57cec5SDimitry Andric if (!isInlineSpecified() || getStorageClass() == SC_Extern) 33460b57cec5SDimitry Andric return false; 33470b57cec5SDimitry Andric 33480b57cec5SDimitry Andric const FunctionDecl *Prev = this; 33490b57cec5SDimitry Andric bool FoundBody = false; 33500b57cec5SDimitry Andric while ((Prev = Prev->getPreviousDecl())) { 3351480093f4SDimitry Andric FoundBody |= Prev->doesThisDeclarationHaveABody(); 33520b57cec5SDimitry Andric 3353480093f4SDimitry Andric if (Prev->doesThisDeclarationHaveABody()) { 33540b57cec5SDimitry Andric // If it's not the case that both 'inline' and 'extern' are 33550b57cec5SDimitry Andric // specified on the definition, then it is always externally visible. 33560b57cec5SDimitry Andric if (!Prev->isInlineSpecified() || 33570b57cec5SDimitry Andric Prev->getStorageClass() != SC_Extern) 33580b57cec5SDimitry Andric return false; 33590b57cec5SDimitry Andric } else if (Prev->isInlineSpecified() && 33600b57cec5SDimitry Andric Prev->getStorageClass() != SC_Extern) { 33610b57cec5SDimitry Andric return false; 33620b57cec5SDimitry Andric } 33630b57cec5SDimitry Andric } 33640b57cec5SDimitry Andric return FoundBody; 33650b57cec5SDimitry Andric } 33660b57cec5SDimitry Andric 33670b57cec5SDimitry Andric // C99 6.7.4p6: 33680b57cec5SDimitry Andric // [...] If all of the file scope declarations for a function in a 33690b57cec5SDimitry Andric // translation unit include the inline function specifier without extern, 33700b57cec5SDimitry Andric // then the definition in that translation unit is an inline definition. 33710b57cec5SDimitry Andric if (isInlineSpecified() && getStorageClass() != SC_Extern) 33720b57cec5SDimitry Andric return false; 33730b57cec5SDimitry Andric const FunctionDecl *Prev = this; 33740b57cec5SDimitry Andric bool FoundBody = false; 33750b57cec5SDimitry Andric while ((Prev = Prev->getPreviousDecl())) { 3376480093f4SDimitry Andric FoundBody |= Prev->doesThisDeclarationHaveABody(); 33770b57cec5SDimitry Andric if (RedeclForcesDefC99(Prev)) 33780b57cec5SDimitry Andric return false; 33790b57cec5SDimitry Andric } 33800b57cec5SDimitry Andric return FoundBody; 33810b57cec5SDimitry Andric } 33820b57cec5SDimitry Andric 3383480093f4SDimitry Andric FunctionTypeLoc FunctionDecl::getFunctionTypeLoc() const { 33840b57cec5SDimitry Andric const TypeSourceInfo *TSI = getTypeSourceInfo(); 3385480093f4SDimitry Andric return TSI ? TSI->getTypeLoc().IgnoreParens().getAs<FunctionTypeLoc>() 3386480093f4SDimitry Andric : FunctionTypeLoc(); 3387480093f4SDimitry Andric } 3388480093f4SDimitry Andric 3389480093f4SDimitry Andric SourceRange FunctionDecl::getReturnTypeSourceRange() const { 3390480093f4SDimitry Andric FunctionTypeLoc FTL = getFunctionTypeLoc(); 33910b57cec5SDimitry Andric if (!FTL) 33920b57cec5SDimitry Andric return SourceRange(); 33930b57cec5SDimitry Andric 33940b57cec5SDimitry Andric // Skip self-referential return types. 33950b57cec5SDimitry Andric const SourceManager &SM = getASTContext().getSourceManager(); 33960b57cec5SDimitry Andric SourceRange RTRange = FTL.getReturnLoc().getSourceRange(); 33970b57cec5SDimitry Andric SourceLocation Boundary = getNameInfo().getBeginLoc(); 33980b57cec5SDimitry Andric if (RTRange.isInvalid() || Boundary.isInvalid() || 33990b57cec5SDimitry Andric !SM.isBeforeInTranslationUnit(RTRange.getEnd(), Boundary)) 34000b57cec5SDimitry Andric return SourceRange(); 34010b57cec5SDimitry Andric 34020b57cec5SDimitry Andric return RTRange; 34030b57cec5SDimitry Andric } 34040b57cec5SDimitry Andric 3405480093f4SDimitry Andric SourceRange FunctionDecl::getParametersSourceRange() const { 3406480093f4SDimitry Andric unsigned NP = getNumParams(); 3407480093f4SDimitry Andric SourceLocation EllipsisLoc = getEllipsisLoc(); 3408480093f4SDimitry Andric 3409480093f4SDimitry Andric if (NP == 0 && EllipsisLoc.isInvalid()) 34100b57cec5SDimitry Andric return SourceRange(); 34110b57cec5SDimitry Andric 3412480093f4SDimitry Andric SourceLocation Begin = 3413480093f4SDimitry Andric NP > 0 ? ParamInfo[0]->getSourceRange().getBegin() : EllipsisLoc; 3414480093f4SDimitry Andric SourceLocation End = EllipsisLoc.isValid() 3415480093f4SDimitry Andric ? EllipsisLoc 3416480093f4SDimitry Andric : ParamInfo[NP - 1]->getSourceRange().getEnd(); 3417480093f4SDimitry Andric 3418480093f4SDimitry Andric return SourceRange(Begin, End); 3419480093f4SDimitry Andric } 3420480093f4SDimitry Andric 3421480093f4SDimitry Andric SourceRange FunctionDecl::getExceptionSpecSourceRange() const { 3422480093f4SDimitry Andric FunctionTypeLoc FTL = getFunctionTypeLoc(); 3423480093f4SDimitry Andric return FTL ? FTL.getExceptionSpecRange() : SourceRange(); 34240b57cec5SDimitry Andric } 34250b57cec5SDimitry Andric 34260b57cec5SDimitry Andric /// For an inline function definition in C, or for a gnu_inline function 34270b57cec5SDimitry Andric /// in C++, determine whether the definition will be externally visible. 34280b57cec5SDimitry Andric /// 34290b57cec5SDimitry Andric /// Inline function definitions are always available for inlining optimizations. 34300b57cec5SDimitry Andric /// However, depending on the language dialect, declaration specifiers, and 34310b57cec5SDimitry Andric /// attributes, the definition of an inline function may or may not be 34320b57cec5SDimitry Andric /// "externally" visible to other translation units in the program. 34330b57cec5SDimitry Andric /// 34340b57cec5SDimitry Andric /// In C99, inline definitions are not externally visible by default. However, 34350b57cec5SDimitry Andric /// if even one of the global-scope declarations is marked "extern inline", the 34360b57cec5SDimitry Andric /// inline definition becomes externally visible (C99 6.7.4p6). 34370b57cec5SDimitry Andric /// 34380b57cec5SDimitry Andric /// In GNU89 mode, or if the gnu_inline attribute is attached to the function 34390b57cec5SDimitry Andric /// definition, we use the GNU semantics for inline, which are nearly the 34400b57cec5SDimitry Andric /// opposite of C99 semantics. In particular, "inline" by itself will create 34410b57cec5SDimitry Andric /// an externally visible symbol, but "extern inline" will not create an 34420b57cec5SDimitry Andric /// externally visible symbol. 34430b57cec5SDimitry Andric bool FunctionDecl::isInlineDefinitionExternallyVisible() const { 34440b57cec5SDimitry Andric assert((doesThisDeclarationHaveABody() || willHaveBody() || 34450b57cec5SDimitry Andric hasAttr<AliasAttr>()) && 34460b57cec5SDimitry Andric "Must be a function definition"); 34470b57cec5SDimitry Andric assert(isInlined() && "Function must be inline"); 34480b57cec5SDimitry Andric ASTContext &Context = getASTContext(); 34490b57cec5SDimitry Andric 34500b57cec5SDimitry Andric if (Context.getLangOpts().GNUInline || hasAttr<GNUInlineAttr>()) { 34510b57cec5SDimitry Andric // Note: If you change the logic here, please change 34520b57cec5SDimitry Andric // doesDeclarationForceExternallyVisibleDefinition as well. 34530b57cec5SDimitry Andric // 34540b57cec5SDimitry Andric // If it's not the case that both 'inline' and 'extern' are 34550b57cec5SDimitry Andric // specified on the definition, then this inline definition is 34560b57cec5SDimitry Andric // externally visible. 3457a7dea167SDimitry Andric if (Context.getLangOpts().CPlusPlus) 3458a7dea167SDimitry Andric return false; 34590b57cec5SDimitry Andric if (!(isInlineSpecified() && getStorageClass() == SC_Extern)) 34600b57cec5SDimitry Andric return true; 34610b57cec5SDimitry Andric 34620b57cec5SDimitry Andric // If any declaration is 'inline' but not 'extern', then this definition 34630b57cec5SDimitry Andric // is externally visible. 34640b57cec5SDimitry Andric for (auto Redecl : redecls()) { 34650b57cec5SDimitry Andric if (Redecl->isInlineSpecified() && 34660b57cec5SDimitry Andric Redecl->getStorageClass() != SC_Extern) 34670b57cec5SDimitry Andric return true; 34680b57cec5SDimitry Andric } 34690b57cec5SDimitry Andric 34700b57cec5SDimitry Andric return false; 34710b57cec5SDimitry Andric } 34720b57cec5SDimitry Andric 34730b57cec5SDimitry Andric // The rest of this function is C-only. 34740b57cec5SDimitry Andric assert(!Context.getLangOpts().CPlusPlus && 34750b57cec5SDimitry Andric "should not use C inline rules in C++"); 34760b57cec5SDimitry Andric 34770b57cec5SDimitry Andric // C99 6.7.4p6: 34780b57cec5SDimitry Andric // [...] If all of the file scope declarations for a function in a 34790b57cec5SDimitry Andric // translation unit include the inline function specifier without extern, 34800b57cec5SDimitry Andric // then the definition in that translation unit is an inline definition. 34810b57cec5SDimitry Andric for (auto Redecl : redecls()) { 34820b57cec5SDimitry Andric if (RedeclForcesDefC99(Redecl)) 34830b57cec5SDimitry Andric return true; 34840b57cec5SDimitry Andric } 34850b57cec5SDimitry Andric 34860b57cec5SDimitry Andric // C99 6.7.4p6: 34870b57cec5SDimitry Andric // An inline definition does not provide an external definition for the 34880b57cec5SDimitry Andric // function, and does not forbid an external definition in another 34890b57cec5SDimitry Andric // translation unit. 34900b57cec5SDimitry Andric return false; 34910b57cec5SDimitry Andric } 34920b57cec5SDimitry Andric 34930b57cec5SDimitry Andric /// getOverloadedOperator - Which C++ overloaded operator this 34940b57cec5SDimitry Andric /// function represents, if any. 34950b57cec5SDimitry Andric OverloadedOperatorKind FunctionDecl::getOverloadedOperator() const { 34960b57cec5SDimitry Andric if (getDeclName().getNameKind() == DeclarationName::CXXOperatorName) 34970b57cec5SDimitry Andric return getDeclName().getCXXOverloadedOperator(); 34980b57cec5SDimitry Andric else 34990b57cec5SDimitry Andric return OO_None; 35000b57cec5SDimitry Andric } 35010b57cec5SDimitry Andric 35020b57cec5SDimitry Andric /// getLiteralIdentifier - The literal suffix identifier this function 35030b57cec5SDimitry Andric /// represents, if any. 35040b57cec5SDimitry Andric const IdentifierInfo *FunctionDecl::getLiteralIdentifier() const { 35050b57cec5SDimitry Andric if (getDeclName().getNameKind() == DeclarationName::CXXLiteralOperatorName) 35060b57cec5SDimitry Andric return getDeclName().getCXXLiteralIdentifier(); 35070b57cec5SDimitry Andric else 35080b57cec5SDimitry Andric return nullptr; 35090b57cec5SDimitry Andric } 35100b57cec5SDimitry Andric 35110b57cec5SDimitry Andric FunctionDecl::TemplatedKind FunctionDecl::getTemplatedKind() const { 35120b57cec5SDimitry Andric if (TemplateOrSpecialization.isNull()) 35130b57cec5SDimitry Andric return TK_NonTemplate; 35140b57cec5SDimitry Andric if (TemplateOrSpecialization.is<FunctionTemplateDecl *>()) 35150b57cec5SDimitry Andric return TK_FunctionTemplate; 35160b57cec5SDimitry Andric if (TemplateOrSpecialization.is<MemberSpecializationInfo *>()) 35170b57cec5SDimitry Andric return TK_MemberSpecialization; 35180b57cec5SDimitry Andric if (TemplateOrSpecialization.is<FunctionTemplateSpecializationInfo *>()) 35190b57cec5SDimitry Andric return TK_FunctionTemplateSpecialization; 35200b57cec5SDimitry Andric if (TemplateOrSpecialization.is 35210b57cec5SDimitry Andric <DependentFunctionTemplateSpecializationInfo*>()) 35220b57cec5SDimitry Andric return TK_DependentFunctionTemplateSpecialization; 35230b57cec5SDimitry Andric 35240b57cec5SDimitry Andric llvm_unreachable("Did we miss a TemplateOrSpecialization type?"); 35250b57cec5SDimitry Andric } 35260b57cec5SDimitry Andric 35270b57cec5SDimitry Andric FunctionDecl *FunctionDecl::getInstantiatedFromMemberFunction() const { 35280b57cec5SDimitry Andric if (MemberSpecializationInfo *Info = getMemberSpecializationInfo()) 35290b57cec5SDimitry Andric return cast<FunctionDecl>(Info->getInstantiatedFrom()); 35300b57cec5SDimitry Andric 35310b57cec5SDimitry Andric return nullptr; 35320b57cec5SDimitry Andric } 35330b57cec5SDimitry Andric 35340b57cec5SDimitry Andric MemberSpecializationInfo *FunctionDecl::getMemberSpecializationInfo() const { 35350b57cec5SDimitry Andric if (auto *MSI = 35360b57cec5SDimitry Andric TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo *>()) 35370b57cec5SDimitry Andric return MSI; 35380b57cec5SDimitry Andric if (auto *FTSI = TemplateOrSpecialization 35390b57cec5SDimitry Andric .dyn_cast<FunctionTemplateSpecializationInfo *>()) 35400b57cec5SDimitry Andric return FTSI->getMemberSpecializationInfo(); 35410b57cec5SDimitry Andric return nullptr; 35420b57cec5SDimitry Andric } 35430b57cec5SDimitry Andric 35440b57cec5SDimitry Andric void 35450b57cec5SDimitry Andric FunctionDecl::setInstantiationOfMemberFunction(ASTContext &C, 35460b57cec5SDimitry Andric FunctionDecl *FD, 35470b57cec5SDimitry Andric TemplateSpecializationKind TSK) { 35480b57cec5SDimitry Andric assert(TemplateOrSpecialization.isNull() && 35490b57cec5SDimitry Andric "Member function is already a specialization"); 35500b57cec5SDimitry Andric MemberSpecializationInfo *Info 35510b57cec5SDimitry Andric = new (C) MemberSpecializationInfo(FD, TSK); 35520b57cec5SDimitry Andric TemplateOrSpecialization = Info; 35530b57cec5SDimitry Andric } 35540b57cec5SDimitry Andric 35550b57cec5SDimitry Andric FunctionTemplateDecl *FunctionDecl::getDescribedFunctionTemplate() const { 35560b57cec5SDimitry Andric return TemplateOrSpecialization.dyn_cast<FunctionTemplateDecl *>(); 35570b57cec5SDimitry Andric } 35580b57cec5SDimitry Andric 35590b57cec5SDimitry Andric void FunctionDecl::setDescribedFunctionTemplate(FunctionTemplateDecl *Template) { 35600b57cec5SDimitry Andric assert(TemplateOrSpecialization.isNull() && 35610b57cec5SDimitry Andric "Member function is already a specialization"); 35620b57cec5SDimitry Andric TemplateOrSpecialization = Template; 35630b57cec5SDimitry Andric } 35640b57cec5SDimitry Andric 35650b57cec5SDimitry Andric bool FunctionDecl::isImplicitlyInstantiable() const { 35660b57cec5SDimitry Andric // If the function is invalid, it can't be implicitly instantiated. 35670b57cec5SDimitry Andric if (isInvalidDecl()) 35680b57cec5SDimitry Andric return false; 35690b57cec5SDimitry Andric 35700b57cec5SDimitry Andric switch (getTemplateSpecializationKindForInstantiation()) { 35710b57cec5SDimitry Andric case TSK_Undeclared: 35720b57cec5SDimitry Andric case TSK_ExplicitInstantiationDefinition: 35730b57cec5SDimitry Andric case TSK_ExplicitSpecialization: 35740b57cec5SDimitry Andric return false; 35750b57cec5SDimitry Andric 35760b57cec5SDimitry Andric case TSK_ImplicitInstantiation: 35770b57cec5SDimitry Andric return true; 35780b57cec5SDimitry Andric 35790b57cec5SDimitry Andric case TSK_ExplicitInstantiationDeclaration: 35800b57cec5SDimitry Andric // Handled below. 35810b57cec5SDimitry Andric break; 35820b57cec5SDimitry Andric } 35830b57cec5SDimitry Andric 35840b57cec5SDimitry Andric // Find the actual template from which we will instantiate. 35850b57cec5SDimitry Andric const FunctionDecl *PatternDecl = getTemplateInstantiationPattern(); 35860b57cec5SDimitry Andric bool HasPattern = false; 35870b57cec5SDimitry Andric if (PatternDecl) 35880b57cec5SDimitry Andric HasPattern = PatternDecl->hasBody(PatternDecl); 35890b57cec5SDimitry Andric 35900b57cec5SDimitry Andric // C++0x [temp.explicit]p9: 35910b57cec5SDimitry Andric // Except for inline functions, other explicit instantiation declarations 35920b57cec5SDimitry Andric // have the effect of suppressing the implicit instantiation of the entity 35930b57cec5SDimitry Andric // to which they refer. 35940b57cec5SDimitry Andric if (!HasPattern || !PatternDecl) 35950b57cec5SDimitry Andric return true; 35960b57cec5SDimitry Andric 35970b57cec5SDimitry Andric return PatternDecl->isInlined(); 35980b57cec5SDimitry Andric } 35990b57cec5SDimitry Andric 36000b57cec5SDimitry Andric bool FunctionDecl::isTemplateInstantiation() const { 36010b57cec5SDimitry Andric // FIXME: Remove this, it's not clear what it means. (Which template 36020b57cec5SDimitry Andric // specialization kind?) 36030b57cec5SDimitry Andric return clang::isTemplateInstantiation(getTemplateSpecializationKind()); 36040b57cec5SDimitry Andric } 36050b57cec5SDimitry Andric 36065ffd83dbSDimitry Andric FunctionDecl * 36075ffd83dbSDimitry Andric FunctionDecl::getTemplateInstantiationPattern(bool ForDefinition) const { 36080b57cec5SDimitry Andric // If this is a generic lambda call operator specialization, its 36090b57cec5SDimitry Andric // instantiation pattern is always its primary template's pattern 36100b57cec5SDimitry Andric // even if its primary template was instantiated from another 36110b57cec5SDimitry Andric // member template (which happens with nested generic lambdas). 36120b57cec5SDimitry Andric // Since a lambda's call operator's body is transformed eagerly, 36130b57cec5SDimitry Andric // we don't have to go hunting for a prototype definition template 36140b57cec5SDimitry Andric // (i.e. instantiated-from-member-template) to use as an instantiation 36150b57cec5SDimitry Andric // pattern. 36160b57cec5SDimitry Andric 36170b57cec5SDimitry Andric if (isGenericLambdaCallOperatorSpecialization( 36180b57cec5SDimitry Andric dyn_cast<CXXMethodDecl>(this))) { 36190b57cec5SDimitry Andric assert(getPrimaryTemplate() && "not a generic lambda call operator?"); 36200b57cec5SDimitry Andric return getDefinitionOrSelf(getPrimaryTemplate()->getTemplatedDecl()); 36210b57cec5SDimitry Andric } 36220b57cec5SDimitry Andric 36230b57cec5SDimitry Andric if (MemberSpecializationInfo *Info = getMemberSpecializationInfo()) { 36245ffd83dbSDimitry Andric if (ForDefinition && 36255ffd83dbSDimitry Andric !clang::isTemplateInstantiation(Info->getTemplateSpecializationKind())) 36260b57cec5SDimitry Andric return nullptr; 36270b57cec5SDimitry Andric return getDefinitionOrSelf(cast<FunctionDecl>(Info->getInstantiatedFrom())); 36280b57cec5SDimitry Andric } 36290b57cec5SDimitry Andric 36305ffd83dbSDimitry Andric if (ForDefinition && 36315ffd83dbSDimitry Andric !clang::isTemplateInstantiation(getTemplateSpecializationKind())) 36320b57cec5SDimitry Andric return nullptr; 36330b57cec5SDimitry Andric 36340b57cec5SDimitry Andric if (FunctionTemplateDecl *Primary = getPrimaryTemplate()) { 36350b57cec5SDimitry Andric // If we hit a point where the user provided a specialization of this 36360b57cec5SDimitry Andric // template, we're done looking. 36375ffd83dbSDimitry Andric while (!ForDefinition || !Primary->isMemberSpecialization()) { 36380b57cec5SDimitry Andric auto *NewPrimary = Primary->getInstantiatedFromMemberTemplate(); 36390b57cec5SDimitry Andric if (!NewPrimary) 36400b57cec5SDimitry Andric break; 36410b57cec5SDimitry Andric Primary = NewPrimary; 36420b57cec5SDimitry Andric } 36430b57cec5SDimitry Andric 36440b57cec5SDimitry Andric return getDefinitionOrSelf(Primary->getTemplatedDecl()); 36450b57cec5SDimitry Andric } 36460b57cec5SDimitry Andric 36470b57cec5SDimitry Andric return nullptr; 36480b57cec5SDimitry Andric } 36490b57cec5SDimitry Andric 36500b57cec5SDimitry Andric FunctionTemplateDecl *FunctionDecl::getPrimaryTemplate() const { 36510b57cec5SDimitry Andric if (FunctionTemplateSpecializationInfo *Info 36520b57cec5SDimitry Andric = TemplateOrSpecialization 36530b57cec5SDimitry Andric .dyn_cast<FunctionTemplateSpecializationInfo*>()) { 36540b57cec5SDimitry Andric return Info->getTemplate(); 36550b57cec5SDimitry Andric } 36560b57cec5SDimitry Andric return nullptr; 36570b57cec5SDimitry Andric } 36580b57cec5SDimitry Andric 36590b57cec5SDimitry Andric FunctionTemplateSpecializationInfo * 36600b57cec5SDimitry Andric FunctionDecl::getTemplateSpecializationInfo() const { 36610b57cec5SDimitry Andric return TemplateOrSpecialization 36620b57cec5SDimitry Andric .dyn_cast<FunctionTemplateSpecializationInfo *>(); 36630b57cec5SDimitry Andric } 36640b57cec5SDimitry Andric 36650b57cec5SDimitry Andric const TemplateArgumentList * 36660b57cec5SDimitry Andric FunctionDecl::getTemplateSpecializationArgs() const { 36670b57cec5SDimitry Andric if (FunctionTemplateSpecializationInfo *Info 36680b57cec5SDimitry Andric = TemplateOrSpecialization 36690b57cec5SDimitry Andric .dyn_cast<FunctionTemplateSpecializationInfo*>()) { 36700b57cec5SDimitry Andric return Info->TemplateArguments; 36710b57cec5SDimitry Andric } 36720b57cec5SDimitry Andric return nullptr; 36730b57cec5SDimitry Andric } 36740b57cec5SDimitry Andric 36750b57cec5SDimitry Andric const ASTTemplateArgumentListInfo * 36760b57cec5SDimitry Andric FunctionDecl::getTemplateSpecializationArgsAsWritten() const { 36770b57cec5SDimitry Andric if (FunctionTemplateSpecializationInfo *Info 36780b57cec5SDimitry Andric = TemplateOrSpecialization 36790b57cec5SDimitry Andric .dyn_cast<FunctionTemplateSpecializationInfo*>()) { 36800b57cec5SDimitry Andric return Info->TemplateArgumentsAsWritten; 36810b57cec5SDimitry Andric } 36820b57cec5SDimitry Andric return nullptr; 36830b57cec5SDimitry Andric } 36840b57cec5SDimitry Andric 36850b57cec5SDimitry Andric void 36860b57cec5SDimitry Andric FunctionDecl::setFunctionTemplateSpecialization(ASTContext &C, 36870b57cec5SDimitry Andric FunctionTemplateDecl *Template, 36880b57cec5SDimitry Andric const TemplateArgumentList *TemplateArgs, 36890b57cec5SDimitry Andric void *InsertPos, 36900b57cec5SDimitry Andric TemplateSpecializationKind TSK, 36910b57cec5SDimitry Andric const TemplateArgumentListInfo *TemplateArgsAsWritten, 36920b57cec5SDimitry Andric SourceLocation PointOfInstantiation) { 36930b57cec5SDimitry Andric assert((TemplateOrSpecialization.isNull() || 36940b57cec5SDimitry Andric TemplateOrSpecialization.is<MemberSpecializationInfo *>()) && 36950b57cec5SDimitry Andric "Member function is already a specialization"); 36960b57cec5SDimitry Andric assert(TSK != TSK_Undeclared && 36970b57cec5SDimitry Andric "Must specify the type of function template specialization"); 36980b57cec5SDimitry Andric assert((TemplateOrSpecialization.isNull() || 36990b57cec5SDimitry Andric TSK == TSK_ExplicitSpecialization) && 37000b57cec5SDimitry Andric "Member specialization must be an explicit specialization"); 37010b57cec5SDimitry Andric FunctionTemplateSpecializationInfo *Info = 37020b57cec5SDimitry Andric FunctionTemplateSpecializationInfo::Create( 37030b57cec5SDimitry Andric C, this, Template, TSK, TemplateArgs, TemplateArgsAsWritten, 37040b57cec5SDimitry Andric PointOfInstantiation, 37050b57cec5SDimitry Andric TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo *>()); 37060b57cec5SDimitry Andric TemplateOrSpecialization = Info; 37070b57cec5SDimitry Andric Template->addSpecialization(Info, InsertPos); 37080b57cec5SDimitry Andric } 37090b57cec5SDimitry Andric 37100b57cec5SDimitry Andric void 37110b57cec5SDimitry Andric FunctionDecl::setDependentTemplateSpecialization(ASTContext &Context, 37120b57cec5SDimitry Andric const UnresolvedSetImpl &Templates, 37130b57cec5SDimitry Andric const TemplateArgumentListInfo &TemplateArgs) { 37140b57cec5SDimitry Andric assert(TemplateOrSpecialization.isNull()); 37150b57cec5SDimitry Andric DependentFunctionTemplateSpecializationInfo *Info = 37160b57cec5SDimitry Andric DependentFunctionTemplateSpecializationInfo::Create(Context, Templates, 37170b57cec5SDimitry Andric TemplateArgs); 37180b57cec5SDimitry Andric TemplateOrSpecialization = Info; 37190b57cec5SDimitry Andric } 37200b57cec5SDimitry Andric 37210b57cec5SDimitry Andric DependentFunctionTemplateSpecializationInfo * 37220b57cec5SDimitry Andric FunctionDecl::getDependentSpecializationInfo() const { 37230b57cec5SDimitry Andric return TemplateOrSpecialization 37240b57cec5SDimitry Andric .dyn_cast<DependentFunctionTemplateSpecializationInfo *>(); 37250b57cec5SDimitry Andric } 37260b57cec5SDimitry Andric 37270b57cec5SDimitry Andric DependentFunctionTemplateSpecializationInfo * 37280b57cec5SDimitry Andric DependentFunctionTemplateSpecializationInfo::Create( 37290b57cec5SDimitry Andric ASTContext &Context, const UnresolvedSetImpl &Ts, 37300b57cec5SDimitry Andric const TemplateArgumentListInfo &TArgs) { 37310b57cec5SDimitry Andric void *Buffer = Context.Allocate( 37320b57cec5SDimitry Andric totalSizeToAlloc<TemplateArgumentLoc, FunctionTemplateDecl *>( 37330b57cec5SDimitry Andric TArgs.size(), Ts.size())); 37340b57cec5SDimitry Andric return new (Buffer) DependentFunctionTemplateSpecializationInfo(Ts, TArgs); 37350b57cec5SDimitry Andric } 37360b57cec5SDimitry Andric 37370b57cec5SDimitry Andric DependentFunctionTemplateSpecializationInfo:: 37380b57cec5SDimitry Andric DependentFunctionTemplateSpecializationInfo(const UnresolvedSetImpl &Ts, 37390b57cec5SDimitry Andric const TemplateArgumentListInfo &TArgs) 37400b57cec5SDimitry Andric : AngleLocs(TArgs.getLAngleLoc(), TArgs.getRAngleLoc()) { 37410b57cec5SDimitry Andric NumTemplates = Ts.size(); 37420b57cec5SDimitry Andric NumArgs = TArgs.size(); 37430b57cec5SDimitry Andric 37440b57cec5SDimitry Andric FunctionTemplateDecl **TsArray = getTrailingObjects<FunctionTemplateDecl *>(); 37450b57cec5SDimitry Andric for (unsigned I = 0, E = Ts.size(); I != E; ++I) 37460b57cec5SDimitry Andric TsArray[I] = cast<FunctionTemplateDecl>(Ts[I]->getUnderlyingDecl()); 37470b57cec5SDimitry Andric 37480b57cec5SDimitry Andric TemplateArgumentLoc *ArgsArray = getTrailingObjects<TemplateArgumentLoc>(); 37490b57cec5SDimitry Andric for (unsigned I = 0, E = TArgs.size(); I != E; ++I) 37500b57cec5SDimitry Andric new (&ArgsArray[I]) TemplateArgumentLoc(TArgs[I]); 37510b57cec5SDimitry Andric } 37520b57cec5SDimitry Andric 37530b57cec5SDimitry Andric TemplateSpecializationKind FunctionDecl::getTemplateSpecializationKind() const { 37540b57cec5SDimitry Andric // For a function template specialization, query the specialization 37550b57cec5SDimitry Andric // information object. 37560b57cec5SDimitry Andric if (FunctionTemplateSpecializationInfo *FTSInfo = 37570b57cec5SDimitry Andric TemplateOrSpecialization 37580b57cec5SDimitry Andric .dyn_cast<FunctionTemplateSpecializationInfo *>()) 37590b57cec5SDimitry Andric return FTSInfo->getTemplateSpecializationKind(); 37600b57cec5SDimitry Andric 37610b57cec5SDimitry Andric if (MemberSpecializationInfo *MSInfo = 37620b57cec5SDimitry Andric TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo *>()) 37630b57cec5SDimitry Andric return MSInfo->getTemplateSpecializationKind(); 37640b57cec5SDimitry Andric 37650b57cec5SDimitry Andric return TSK_Undeclared; 37660b57cec5SDimitry Andric } 37670b57cec5SDimitry Andric 37680b57cec5SDimitry Andric TemplateSpecializationKind 37690b57cec5SDimitry Andric FunctionDecl::getTemplateSpecializationKindForInstantiation() const { 37700b57cec5SDimitry Andric // This is the same as getTemplateSpecializationKind(), except that for a 37710b57cec5SDimitry Andric // function that is both a function template specialization and a member 37720b57cec5SDimitry Andric // specialization, we prefer the member specialization information. Eg: 37730b57cec5SDimitry Andric // 37740b57cec5SDimitry Andric // template<typename T> struct A { 37750b57cec5SDimitry Andric // template<typename U> void f() {} 37760b57cec5SDimitry Andric // template<> void f<int>() {} 37770b57cec5SDimitry Andric // }; 37780b57cec5SDimitry Andric // 37790b57cec5SDimitry Andric // For A<int>::f<int>(): 37800b57cec5SDimitry Andric // * getTemplateSpecializationKind() will return TSK_ExplicitSpecialization 37810b57cec5SDimitry Andric // * getTemplateSpecializationKindForInstantiation() will return 37820b57cec5SDimitry Andric // TSK_ImplicitInstantiation 37830b57cec5SDimitry Andric // 37840b57cec5SDimitry Andric // This reflects the facts that A<int>::f<int> is an explicit specialization 37850b57cec5SDimitry Andric // of A<int>::f, and that A<int>::f<int> should be implicitly instantiated 37860b57cec5SDimitry Andric // from A::f<int> if a definition is needed. 37870b57cec5SDimitry Andric if (FunctionTemplateSpecializationInfo *FTSInfo = 37880b57cec5SDimitry Andric TemplateOrSpecialization 37890b57cec5SDimitry Andric .dyn_cast<FunctionTemplateSpecializationInfo *>()) { 37900b57cec5SDimitry Andric if (auto *MSInfo = FTSInfo->getMemberSpecializationInfo()) 37910b57cec5SDimitry Andric return MSInfo->getTemplateSpecializationKind(); 37920b57cec5SDimitry Andric return FTSInfo->getTemplateSpecializationKind(); 37930b57cec5SDimitry Andric } 37940b57cec5SDimitry Andric 37950b57cec5SDimitry Andric if (MemberSpecializationInfo *MSInfo = 37960b57cec5SDimitry Andric TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo *>()) 37970b57cec5SDimitry Andric return MSInfo->getTemplateSpecializationKind(); 37980b57cec5SDimitry Andric 37990b57cec5SDimitry Andric return TSK_Undeclared; 38000b57cec5SDimitry Andric } 38010b57cec5SDimitry Andric 38020b57cec5SDimitry Andric void 38030b57cec5SDimitry Andric FunctionDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK, 38040b57cec5SDimitry Andric SourceLocation PointOfInstantiation) { 38050b57cec5SDimitry Andric if (FunctionTemplateSpecializationInfo *FTSInfo 38060b57cec5SDimitry Andric = TemplateOrSpecialization.dyn_cast< 38070b57cec5SDimitry Andric FunctionTemplateSpecializationInfo*>()) { 38080b57cec5SDimitry Andric FTSInfo->setTemplateSpecializationKind(TSK); 38090b57cec5SDimitry Andric if (TSK != TSK_ExplicitSpecialization && 38100b57cec5SDimitry Andric PointOfInstantiation.isValid() && 38110b57cec5SDimitry Andric FTSInfo->getPointOfInstantiation().isInvalid()) { 38120b57cec5SDimitry Andric FTSInfo->setPointOfInstantiation(PointOfInstantiation); 38130b57cec5SDimitry Andric if (ASTMutationListener *L = getASTContext().getASTMutationListener()) 38140b57cec5SDimitry Andric L->InstantiationRequested(this); 38150b57cec5SDimitry Andric } 38160b57cec5SDimitry Andric } else if (MemberSpecializationInfo *MSInfo 38170b57cec5SDimitry Andric = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>()) { 38180b57cec5SDimitry Andric MSInfo->setTemplateSpecializationKind(TSK); 38190b57cec5SDimitry Andric if (TSK != TSK_ExplicitSpecialization && 38200b57cec5SDimitry Andric PointOfInstantiation.isValid() && 38210b57cec5SDimitry Andric MSInfo->getPointOfInstantiation().isInvalid()) { 38220b57cec5SDimitry Andric MSInfo->setPointOfInstantiation(PointOfInstantiation); 38230b57cec5SDimitry Andric if (ASTMutationListener *L = getASTContext().getASTMutationListener()) 38240b57cec5SDimitry Andric L->InstantiationRequested(this); 38250b57cec5SDimitry Andric } 38260b57cec5SDimitry Andric } else 38270b57cec5SDimitry Andric llvm_unreachable("Function cannot have a template specialization kind"); 38280b57cec5SDimitry Andric } 38290b57cec5SDimitry Andric 38300b57cec5SDimitry Andric SourceLocation FunctionDecl::getPointOfInstantiation() const { 38310b57cec5SDimitry Andric if (FunctionTemplateSpecializationInfo *FTSInfo 38320b57cec5SDimitry Andric = TemplateOrSpecialization.dyn_cast< 38330b57cec5SDimitry Andric FunctionTemplateSpecializationInfo*>()) 38340b57cec5SDimitry Andric return FTSInfo->getPointOfInstantiation(); 38350b57cec5SDimitry Andric else if (MemberSpecializationInfo *MSInfo 38360b57cec5SDimitry Andric = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>()) 38370b57cec5SDimitry Andric return MSInfo->getPointOfInstantiation(); 38380b57cec5SDimitry Andric 38390b57cec5SDimitry Andric return SourceLocation(); 38400b57cec5SDimitry Andric } 38410b57cec5SDimitry Andric 38420b57cec5SDimitry Andric bool FunctionDecl::isOutOfLine() const { 38430b57cec5SDimitry Andric if (Decl::isOutOfLine()) 38440b57cec5SDimitry Andric return true; 38450b57cec5SDimitry Andric 38460b57cec5SDimitry Andric // If this function was instantiated from a member function of a 38470b57cec5SDimitry Andric // class template, check whether that member function was defined out-of-line. 38480b57cec5SDimitry Andric if (FunctionDecl *FD = getInstantiatedFromMemberFunction()) { 38490b57cec5SDimitry Andric const FunctionDecl *Definition; 38500b57cec5SDimitry Andric if (FD->hasBody(Definition)) 38510b57cec5SDimitry Andric return Definition->isOutOfLine(); 38520b57cec5SDimitry Andric } 38530b57cec5SDimitry Andric 38540b57cec5SDimitry Andric // If this function was instantiated from a function template, 38550b57cec5SDimitry Andric // check whether that function template was defined out-of-line. 38560b57cec5SDimitry Andric if (FunctionTemplateDecl *FunTmpl = getPrimaryTemplate()) { 38570b57cec5SDimitry Andric const FunctionDecl *Definition; 38580b57cec5SDimitry Andric if (FunTmpl->getTemplatedDecl()->hasBody(Definition)) 38590b57cec5SDimitry Andric return Definition->isOutOfLine(); 38600b57cec5SDimitry Andric } 38610b57cec5SDimitry Andric 38620b57cec5SDimitry Andric return false; 38630b57cec5SDimitry Andric } 38640b57cec5SDimitry Andric 38650b57cec5SDimitry Andric SourceRange FunctionDecl::getSourceRange() const { 38660b57cec5SDimitry Andric return SourceRange(getOuterLocStart(), EndRangeLoc); 38670b57cec5SDimitry Andric } 38680b57cec5SDimitry Andric 38690b57cec5SDimitry Andric unsigned FunctionDecl::getMemoryFunctionKind() const { 38700b57cec5SDimitry Andric IdentifierInfo *FnInfo = getIdentifier(); 38710b57cec5SDimitry Andric 38720b57cec5SDimitry Andric if (!FnInfo) 38730b57cec5SDimitry Andric return 0; 38740b57cec5SDimitry Andric 38750b57cec5SDimitry Andric // Builtin handling. 38760b57cec5SDimitry Andric switch (getBuiltinID()) { 38770b57cec5SDimitry Andric case Builtin::BI__builtin_memset: 38780b57cec5SDimitry Andric case Builtin::BI__builtin___memset_chk: 38790b57cec5SDimitry Andric case Builtin::BImemset: 38800b57cec5SDimitry Andric return Builtin::BImemset; 38810b57cec5SDimitry Andric 38820b57cec5SDimitry Andric case Builtin::BI__builtin_memcpy: 38830b57cec5SDimitry Andric case Builtin::BI__builtin___memcpy_chk: 38840b57cec5SDimitry Andric case Builtin::BImemcpy: 38850b57cec5SDimitry Andric return Builtin::BImemcpy; 38860b57cec5SDimitry Andric 3887480093f4SDimitry Andric case Builtin::BI__builtin_mempcpy: 3888480093f4SDimitry Andric case Builtin::BI__builtin___mempcpy_chk: 3889480093f4SDimitry Andric case Builtin::BImempcpy: 3890480093f4SDimitry Andric return Builtin::BImempcpy; 3891480093f4SDimitry Andric 38920b57cec5SDimitry Andric case Builtin::BI__builtin_memmove: 38930b57cec5SDimitry Andric case Builtin::BI__builtin___memmove_chk: 38940b57cec5SDimitry Andric case Builtin::BImemmove: 38950b57cec5SDimitry Andric return Builtin::BImemmove; 38960b57cec5SDimitry Andric 38970b57cec5SDimitry Andric case Builtin::BIstrlcpy: 38980b57cec5SDimitry Andric case Builtin::BI__builtin___strlcpy_chk: 38990b57cec5SDimitry Andric return Builtin::BIstrlcpy; 39000b57cec5SDimitry Andric 39010b57cec5SDimitry Andric case Builtin::BIstrlcat: 39020b57cec5SDimitry Andric case Builtin::BI__builtin___strlcat_chk: 39030b57cec5SDimitry Andric return Builtin::BIstrlcat; 39040b57cec5SDimitry Andric 39050b57cec5SDimitry Andric case Builtin::BI__builtin_memcmp: 39060b57cec5SDimitry Andric case Builtin::BImemcmp: 39070b57cec5SDimitry Andric return Builtin::BImemcmp; 39080b57cec5SDimitry Andric 39090b57cec5SDimitry Andric case Builtin::BI__builtin_bcmp: 39100b57cec5SDimitry Andric case Builtin::BIbcmp: 39110b57cec5SDimitry Andric return Builtin::BIbcmp; 39120b57cec5SDimitry Andric 39130b57cec5SDimitry Andric case Builtin::BI__builtin_strncpy: 39140b57cec5SDimitry Andric case Builtin::BI__builtin___strncpy_chk: 39150b57cec5SDimitry Andric case Builtin::BIstrncpy: 39160b57cec5SDimitry Andric return Builtin::BIstrncpy; 39170b57cec5SDimitry Andric 39180b57cec5SDimitry Andric case Builtin::BI__builtin_strncmp: 39190b57cec5SDimitry Andric case Builtin::BIstrncmp: 39200b57cec5SDimitry Andric return Builtin::BIstrncmp; 39210b57cec5SDimitry Andric 39220b57cec5SDimitry Andric case Builtin::BI__builtin_strncasecmp: 39230b57cec5SDimitry Andric case Builtin::BIstrncasecmp: 39240b57cec5SDimitry Andric return Builtin::BIstrncasecmp; 39250b57cec5SDimitry Andric 39260b57cec5SDimitry Andric case Builtin::BI__builtin_strncat: 39270b57cec5SDimitry Andric case Builtin::BI__builtin___strncat_chk: 39280b57cec5SDimitry Andric case Builtin::BIstrncat: 39290b57cec5SDimitry Andric return Builtin::BIstrncat; 39300b57cec5SDimitry Andric 39310b57cec5SDimitry Andric case Builtin::BI__builtin_strndup: 39320b57cec5SDimitry Andric case Builtin::BIstrndup: 39330b57cec5SDimitry Andric return Builtin::BIstrndup; 39340b57cec5SDimitry Andric 39350b57cec5SDimitry Andric case Builtin::BI__builtin_strlen: 39360b57cec5SDimitry Andric case Builtin::BIstrlen: 39370b57cec5SDimitry Andric return Builtin::BIstrlen; 39380b57cec5SDimitry Andric 39390b57cec5SDimitry Andric case Builtin::BI__builtin_bzero: 39400b57cec5SDimitry Andric case Builtin::BIbzero: 39410b57cec5SDimitry Andric return Builtin::BIbzero; 39420b57cec5SDimitry Andric 39430b57cec5SDimitry Andric default: 39440b57cec5SDimitry Andric if (isExternC()) { 39450b57cec5SDimitry Andric if (FnInfo->isStr("memset")) 39460b57cec5SDimitry Andric return Builtin::BImemset; 39470b57cec5SDimitry Andric else if (FnInfo->isStr("memcpy")) 39480b57cec5SDimitry Andric return Builtin::BImemcpy; 3949480093f4SDimitry Andric else if (FnInfo->isStr("mempcpy")) 3950480093f4SDimitry Andric return Builtin::BImempcpy; 39510b57cec5SDimitry Andric else if (FnInfo->isStr("memmove")) 39520b57cec5SDimitry Andric return Builtin::BImemmove; 39530b57cec5SDimitry Andric else if (FnInfo->isStr("memcmp")) 39540b57cec5SDimitry Andric return Builtin::BImemcmp; 39550b57cec5SDimitry Andric else if (FnInfo->isStr("bcmp")) 39560b57cec5SDimitry Andric return Builtin::BIbcmp; 39570b57cec5SDimitry Andric else if (FnInfo->isStr("strncpy")) 39580b57cec5SDimitry Andric return Builtin::BIstrncpy; 39590b57cec5SDimitry Andric else if (FnInfo->isStr("strncmp")) 39600b57cec5SDimitry Andric return Builtin::BIstrncmp; 39610b57cec5SDimitry Andric else if (FnInfo->isStr("strncasecmp")) 39620b57cec5SDimitry Andric return Builtin::BIstrncasecmp; 39630b57cec5SDimitry Andric else if (FnInfo->isStr("strncat")) 39640b57cec5SDimitry Andric return Builtin::BIstrncat; 39650b57cec5SDimitry Andric else if (FnInfo->isStr("strndup")) 39660b57cec5SDimitry Andric return Builtin::BIstrndup; 39670b57cec5SDimitry Andric else if (FnInfo->isStr("strlen")) 39680b57cec5SDimitry Andric return Builtin::BIstrlen; 39690b57cec5SDimitry Andric else if (FnInfo->isStr("bzero")) 39700b57cec5SDimitry Andric return Builtin::BIbzero; 39710b57cec5SDimitry Andric } 39720b57cec5SDimitry Andric break; 39730b57cec5SDimitry Andric } 39740b57cec5SDimitry Andric return 0; 39750b57cec5SDimitry Andric } 39760b57cec5SDimitry Andric 39770b57cec5SDimitry Andric unsigned FunctionDecl::getODRHash() const { 39780b57cec5SDimitry Andric assert(hasODRHash()); 39790b57cec5SDimitry Andric return ODRHash; 39800b57cec5SDimitry Andric } 39810b57cec5SDimitry Andric 39820b57cec5SDimitry Andric unsigned FunctionDecl::getODRHash() { 39830b57cec5SDimitry Andric if (hasODRHash()) 39840b57cec5SDimitry Andric return ODRHash; 39850b57cec5SDimitry Andric 39860b57cec5SDimitry Andric if (auto *FT = getInstantiatedFromMemberFunction()) { 39870b57cec5SDimitry Andric setHasODRHash(true); 39880b57cec5SDimitry Andric ODRHash = FT->getODRHash(); 39890b57cec5SDimitry Andric return ODRHash; 39900b57cec5SDimitry Andric } 39910b57cec5SDimitry Andric 39920b57cec5SDimitry Andric class ODRHash Hash; 39930b57cec5SDimitry Andric Hash.AddFunctionDecl(this); 39940b57cec5SDimitry Andric setHasODRHash(true); 39950b57cec5SDimitry Andric ODRHash = Hash.CalculateHash(); 39960b57cec5SDimitry Andric return ODRHash; 39970b57cec5SDimitry Andric } 39980b57cec5SDimitry Andric 39990b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 40000b57cec5SDimitry Andric // FieldDecl Implementation 40010b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 40020b57cec5SDimitry Andric 40030b57cec5SDimitry Andric FieldDecl *FieldDecl::Create(const ASTContext &C, DeclContext *DC, 40040b57cec5SDimitry Andric SourceLocation StartLoc, SourceLocation IdLoc, 40050b57cec5SDimitry Andric IdentifierInfo *Id, QualType T, 40060b57cec5SDimitry Andric TypeSourceInfo *TInfo, Expr *BW, bool Mutable, 40070b57cec5SDimitry Andric InClassInitStyle InitStyle) { 40080b57cec5SDimitry Andric return new (C, DC) FieldDecl(Decl::Field, DC, StartLoc, IdLoc, Id, T, TInfo, 40090b57cec5SDimitry Andric BW, Mutable, InitStyle); 40100b57cec5SDimitry Andric } 40110b57cec5SDimitry Andric 40120b57cec5SDimitry Andric FieldDecl *FieldDecl::CreateDeserialized(ASTContext &C, unsigned ID) { 40130b57cec5SDimitry Andric return new (C, ID) FieldDecl(Field, nullptr, SourceLocation(), 40140b57cec5SDimitry Andric SourceLocation(), nullptr, QualType(), nullptr, 40150b57cec5SDimitry Andric nullptr, false, ICIS_NoInit); 40160b57cec5SDimitry Andric } 40170b57cec5SDimitry Andric 40180b57cec5SDimitry Andric bool FieldDecl::isAnonymousStructOrUnion() const { 40190b57cec5SDimitry Andric if (!isImplicit() || getDeclName()) 40200b57cec5SDimitry Andric return false; 40210b57cec5SDimitry Andric 40220b57cec5SDimitry Andric if (const auto *Record = getType()->getAs<RecordType>()) 40230b57cec5SDimitry Andric return Record->getDecl()->isAnonymousStructOrUnion(); 40240b57cec5SDimitry Andric 40250b57cec5SDimitry Andric return false; 40260b57cec5SDimitry Andric } 40270b57cec5SDimitry Andric 40280b57cec5SDimitry Andric unsigned FieldDecl::getBitWidthValue(const ASTContext &Ctx) const { 40290b57cec5SDimitry Andric assert(isBitField() && "not a bitfield"); 40300b57cec5SDimitry Andric return getBitWidth()->EvaluateKnownConstInt(Ctx).getZExtValue(); 40310b57cec5SDimitry Andric } 40320b57cec5SDimitry Andric 40330b57cec5SDimitry Andric bool FieldDecl::isZeroLengthBitField(const ASTContext &Ctx) const { 40340b57cec5SDimitry Andric return isUnnamedBitfield() && !getBitWidth()->isValueDependent() && 40350b57cec5SDimitry Andric getBitWidthValue(Ctx) == 0; 40360b57cec5SDimitry Andric } 40370b57cec5SDimitry Andric 40380b57cec5SDimitry Andric bool FieldDecl::isZeroSize(const ASTContext &Ctx) const { 40390b57cec5SDimitry Andric if (isZeroLengthBitField(Ctx)) 40400b57cec5SDimitry Andric return true; 40410b57cec5SDimitry Andric 40420b57cec5SDimitry Andric // C++2a [intro.object]p7: 40430b57cec5SDimitry Andric // An object has nonzero size if it 40440b57cec5SDimitry Andric // -- is not a potentially-overlapping subobject, or 40450b57cec5SDimitry Andric if (!hasAttr<NoUniqueAddressAttr>()) 40460b57cec5SDimitry Andric return false; 40470b57cec5SDimitry Andric 40480b57cec5SDimitry Andric // -- is not of class type, or 40490b57cec5SDimitry Andric const auto *RT = getType()->getAs<RecordType>(); 40500b57cec5SDimitry Andric if (!RT) 40510b57cec5SDimitry Andric return false; 40520b57cec5SDimitry Andric const RecordDecl *RD = RT->getDecl()->getDefinition(); 40530b57cec5SDimitry Andric if (!RD) { 40540b57cec5SDimitry Andric assert(isInvalidDecl() && "valid field has incomplete type"); 40550b57cec5SDimitry Andric return false; 40560b57cec5SDimitry Andric } 40570b57cec5SDimitry Andric 40580b57cec5SDimitry Andric // -- [has] virtual member functions or virtual base classes, or 40590b57cec5SDimitry Andric // -- has subobjects of nonzero size or bit-fields of nonzero length 40600b57cec5SDimitry Andric const auto *CXXRD = cast<CXXRecordDecl>(RD); 40610b57cec5SDimitry Andric if (!CXXRD->isEmpty()) 40620b57cec5SDimitry Andric return false; 40630b57cec5SDimitry Andric 40640b57cec5SDimitry Andric // Otherwise, [...] the circumstances under which the object has zero size 40650b57cec5SDimitry Andric // are implementation-defined. 40660b57cec5SDimitry Andric // FIXME: This might be Itanium ABI specific; we don't yet know what the MS 40670b57cec5SDimitry Andric // ABI will do. 40680b57cec5SDimitry Andric return true; 40690b57cec5SDimitry Andric } 40700b57cec5SDimitry Andric 40710b57cec5SDimitry Andric unsigned FieldDecl::getFieldIndex() const { 40720b57cec5SDimitry Andric const FieldDecl *Canonical = getCanonicalDecl(); 40730b57cec5SDimitry Andric if (Canonical != this) 40740b57cec5SDimitry Andric return Canonical->getFieldIndex(); 40750b57cec5SDimitry Andric 40760b57cec5SDimitry Andric if (CachedFieldIndex) return CachedFieldIndex - 1; 40770b57cec5SDimitry Andric 40780b57cec5SDimitry Andric unsigned Index = 0; 40790b57cec5SDimitry Andric const RecordDecl *RD = getParent()->getDefinition(); 40800b57cec5SDimitry Andric assert(RD && "requested index for field of struct with no definition"); 40810b57cec5SDimitry Andric 40820b57cec5SDimitry Andric for (auto *Field : RD->fields()) { 40830b57cec5SDimitry Andric Field->getCanonicalDecl()->CachedFieldIndex = Index + 1; 40840b57cec5SDimitry Andric ++Index; 40850b57cec5SDimitry Andric } 40860b57cec5SDimitry Andric 40870b57cec5SDimitry Andric assert(CachedFieldIndex && "failed to find field in parent"); 40880b57cec5SDimitry Andric return CachedFieldIndex - 1; 40890b57cec5SDimitry Andric } 40900b57cec5SDimitry Andric 40910b57cec5SDimitry Andric SourceRange FieldDecl::getSourceRange() const { 40920b57cec5SDimitry Andric const Expr *FinalExpr = getInClassInitializer(); 40930b57cec5SDimitry Andric if (!FinalExpr) 40940b57cec5SDimitry Andric FinalExpr = getBitWidth(); 40950b57cec5SDimitry Andric if (FinalExpr) 40960b57cec5SDimitry Andric return SourceRange(getInnerLocStart(), FinalExpr->getEndLoc()); 40970b57cec5SDimitry Andric return DeclaratorDecl::getSourceRange(); 40980b57cec5SDimitry Andric } 40990b57cec5SDimitry Andric 41000b57cec5SDimitry Andric void FieldDecl::setCapturedVLAType(const VariableArrayType *VLAType) { 41010b57cec5SDimitry Andric assert((getParent()->isLambda() || getParent()->isCapturedRecord()) && 41020b57cec5SDimitry Andric "capturing type in non-lambda or captured record."); 41030b57cec5SDimitry Andric assert(InitStorage.getInt() == ISK_NoInit && 41040b57cec5SDimitry Andric InitStorage.getPointer() == nullptr && 41050b57cec5SDimitry Andric "bit width, initializer or captured type already set"); 41060b57cec5SDimitry Andric InitStorage.setPointerAndInt(const_cast<VariableArrayType *>(VLAType), 41070b57cec5SDimitry Andric ISK_CapturedVLAType); 41080b57cec5SDimitry Andric } 41090b57cec5SDimitry Andric 41100b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 41110b57cec5SDimitry Andric // TagDecl Implementation 41120b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 41130b57cec5SDimitry Andric 41140b57cec5SDimitry Andric TagDecl::TagDecl(Kind DK, TagKind TK, const ASTContext &C, DeclContext *DC, 41150b57cec5SDimitry Andric SourceLocation L, IdentifierInfo *Id, TagDecl *PrevDecl, 41160b57cec5SDimitry Andric SourceLocation StartL) 41170b57cec5SDimitry Andric : TypeDecl(DK, DC, L, Id, StartL), DeclContext(DK), redeclarable_base(C), 41180b57cec5SDimitry Andric TypedefNameDeclOrQualifier((TypedefNameDecl *)nullptr) { 41190b57cec5SDimitry Andric assert((DK != Enum || TK == TTK_Enum) && 41200b57cec5SDimitry Andric "EnumDecl not matched with TTK_Enum"); 41210b57cec5SDimitry Andric setPreviousDecl(PrevDecl); 41220b57cec5SDimitry Andric setTagKind(TK); 41230b57cec5SDimitry Andric setCompleteDefinition(false); 41240b57cec5SDimitry Andric setBeingDefined(false); 41250b57cec5SDimitry Andric setEmbeddedInDeclarator(false); 41260b57cec5SDimitry Andric setFreeStanding(false); 41270b57cec5SDimitry Andric setCompleteDefinitionRequired(false); 41280b57cec5SDimitry Andric } 41290b57cec5SDimitry Andric 41300b57cec5SDimitry Andric SourceLocation TagDecl::getOuterLocStart() const { 41310b57cec5SDimitry Andric return getTemplateOrInnerLocStart(this); 41320b57cec5SDimitry Andric } 41330b57cec5SDimitry Andric 41340b57cec5SDimitry Andric SourceRange TagDecl::getSourceRange() const { 41350b57cec5SDimitry Andric SourceLocation RBraceLoc = BraceRange.getEnd(); 41360b57cec5SDimitry Andric SourceLocation E = RBraceLoc.isValid() ? RBraceLoc : getLocation(); 41370b57cec5SDimitry Andric return SourceRange(getOuterLocStart(), E); 41380b57cec5SDimitry Andric } 41390b57cec5SDimitry Andric 41400b57cec5SDimitry Andric TagDecl *TagDecl::getCanonicalDecl() { return getFirstDecl(); } 41410b57cec5SDimitry Andric 41420b57cec5SDimitry Andric void TagDecl::setTypedefNameForAnonDecl(TypedefNameDecl *TDD) { 41430b57cec5SDimitry Andric TypedefNameDeclOrQualifier = TDD; 41440b57cec5SDimitry Andric if (const Type *T = getTypeForDecl()) { 41450b57cec5SDimitry Andric (void)T; 41460b57cec5SDimitry Andric assert(T->isLinkageValid()); 41470b57cec5SDimitry Andric } 41480b57cec5SDimitry Andric assert(isLinkageValid()); 41490b57cec5SDimitry Andric } 41500b57cec5SDimitry Andric 41510b57cec5SDimitry Andric void TagDecl::startDefinition() { 41520b57cec5SDimitry Andric setBeingDefined(true); 41530b57cec5SDimitry Andric 41540b57cec5SDimitry Andric if (auto *D = dyn_cast<CXXRecordDecl>(this)) { 41550b57cec5SDimitry Andric struct CXXRecordDecl::DefinitionData *Data = 41560b57cec5SDimitry Andric new (getASTContext()) struct CXXRecordDecl::DefinitionData(D); 41570b57cec5SDimitry Andric for (auto I : redecls()) 41580b57cec5SDimitry Andric cast<CXXRecordDecl>(I)->DefinitionData = Data; 41590b57cec5SDimitry Andric } 41600b57cec5SDimitry Andric } 41610b57cec5SDimitry Andric 41620b57cec5SDimitry Andric void TagDecl::completeDefinition() { 41630b57cec5SDimitry Andric assert((!isa<CXXRecordDecl>(this) || 41640b57cec5SDimitry Andric cast<CXXRecordDecl>(this)->hasDefinition()) && 41650b57cec5SDimitry Andric "definition completed but not started"); 41660b57cec5SDimitry Andric 41670b57cec5SDimitry Andric setCompleteDefinition(true); 41680b57cec5SDimitry Andric setBeingDefined(false); 41690b57cec5SDimitry Andric 41700b57cec5SDimitry Andric if (ASTMutationListener *L = getASTMutationListener()) 41710b57cec5SDimitry Andric L->CompletedTagDefinition(this); 41720b57cec5SDimitry Andric } 41730b57cec5SDimitry Andric 41740b57cec5SDimitry Andric TagDecl *TagDecl::getDefinition() const { 41750b57cec5SDimitry Andric if (isCompleteDefinition()) 41760b57cec5SDimitry Andric return const_cast<TagDecl *>(this); 41770b57cec5SDimitry Andric 41780b57cec5SDimitry Andric // If it's possible for us to have an out-of-date definition, check now. 41790b57cec5SDimitry Andric if (mayHaveOutOfDateDef()) { 41800b57cec5SDimitry Andric if (IdentifierInfo *II = getIdentifier()) { 41810b57cec5SDimitry Andric if (II->isOutOfDate()) { 41820b57cec5SDimitry Andric updateOutOfDate(*II); 41830b57cec5SDimitry Andric } 41840b57cec5SDimitry Andric } 41850b57cec5SDimitry Andric } 41860b57cec5SDimitry Andric 41870b57cec5SDimitry Andric if (const auto *CXXRD = dyn_cast<CXXRecordDecl>(this)) 41880b57cec5SDimitry Andric return CXXRD->getDefinition(); 41890b57cec5SDimitry Andric 41900b57cec5SDimitry Andric for (auto R : redecls()) 41910b57cec5SDimitry Andric if (R->isCompleteDefinition()) 41920b57cec5SDimitry Andric return R; 41930b57cec5SDimitry Andric 41940b57cec5SDimitry Andric return nullptr; 41950b57cec5SDimitry Andric } 41960b57cec5SDimitry Andric 41970b57cec5SDimitry Andric void TagDecl::setQualifierInfo(NestedNameSpecifierLoc QualifierLoc) { 41980b57cec5SDimitry Andric if (QualifierLoc) { 41990b57cec5SDimitry Andric // Make sure the extended qualifier info is allocated. 42000b57cec5SDimitry Andric if (!hasExtInfo()) 42010b57cec5SDimitry Andric TypedefNameDeclOrQualifier = new (getASTContext()) ExtInfo; 42020b57cec5SDimitry Andric // Set qualifier info. 42030b57cec5SDimitry Andric getExtInfo()->QualifierLoc = QualifierLoc; 42040b57cec5SDimitry Andric } else { 42050b57cec5SDimitry Andric // Here Qualifier == 0, i.e., we are removing the qualifier (if any). 42060b57cec5SDimitry Andric if (hasExtInfo()) { 42070b57cec5SDimitry Andric if (getExtInfo()->NumTemplParamLists == 0) { 42080b57cec5SDimitry Andric getASTContext().Deallocate(getExtInfo()); 42090b57cec5SDimitry Andric TypedefNameDeclOrQualifier = (TypedefNameDecl *)nullptr; 42100b57cec5SDimitry Andric } 42110b57cec5SDimitry Andric else 42120b57cec5SDimitry Andric getExtInfo()->QualifierLoc = QualifierLoc; 42130b57cec5SDimitry Andric } 42140b57cec5SDimitry Andric } 42150b57cec5SDimitry Andric } 42160b57cec5SDimitry Andric 42170b57cec5SDimitry Andric void TagDecl::setTemplateParameterListsInfo( 42180b57cec5SDimitry Andric ASTContext &Context, ArrayRef<TemplateParameterList *> TPLists) { 42190b57cec5SDimitry Andric assert(!TPLists.empty()); 42200b57cec5SDimitry Andric // Make sure the extended decl info is allocated. 42210b57cec5SDimitry Andric if (!hasExtInfo()) 42220b57cec5SDimitry Andric // Allocate external info struct. 42230b57cec5SDimitry Andric TypedefNameDeclOrQualifier = new (getASTContext()) ExtInfo; 42240b57cec5SDimitry Andric // Set the template parameter lists info. 42250b57cec5SDimitry Andric getExtInfo()->setTemplateParameterListsInfo(Context, TPLists); 42260b57cec5SDimitry Andric } 42270b57cec5SDimitry Andric 42280b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 42290b57cec5SDimitry Andric // EnumDecl Implementation 42300b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 42310b57cec5SDimitry Andric 42320b57cec5SDimitry Andric EnumDecl::EnumDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, 42330b57cec5SDimitry Andric SourceLocation IdLoc, IdentifierInfo *Id, EnumDecl *PrevDecl, 42340b57cec5SDimitry Andric bool Scoped, bool ScopedUsingClassTag, bool Fixed) 42350b57cec5SDimitry Andric : TagDecl(Enum, TTK_Enum, C, DC, IdLoc, Id, PrevDecl, StartLoc) { 42360b57cec5SDimitry Andric assert(Scoped || !ScopedUsingClassTag); 42370b57cec5SDimitry Andric IntegerType = nullptr; 42380b57cec5SDimitry Andric setNumPositiveBits(0); 42390b57cec5SDimitry Andric setNumNegativeBits(0); 42400b57cec5SDimitry Andric setScoped(Scoped); 42410b57cec5SDimitry Andric setScopedUsingClassTag(ScopedUsingClassTag); 42420b57cec5SDimitry Andric setFixed(Fixed); 42430b57cec5SDimitry Andric setHasODRHash(false); 42440b57cec5SDimitry Andric ODRHash = 0; 42450b57cec5SDimitry Andric } 42460b57cec5SDimitry Andric 42470b57cec5SDimitry Andric void EnumDecl::anchor() {} 42480b57cec5SDimitry Andric 42490b57cec5SDimitry Andric EnumDecl *EnumDecl::Create(ASTContext &C, DeclContext *DC, 42500b57cec5SDimitry Andric SourceLocation StartLoc, SourceLocation IdLoc, 42510b57cec5SDimitry Andric IdentifierInfo *Id, 42520b57cec5SDimitry Andric EnumDecl *PrevDecl, bool IsScoped, 42530b57cec5SDimitry Andric bool IsScopedUsingClassTag, bool IsFixed) { 42540b57cec5SDimitry Andric auto *Enum = new (C, DC) EnumDecl(C, DC, StartLoc, IdLoc, Id, PrevDecl, 42550b57cec5SDimitry Andric IsScoped, IsScopedUsingClassTag, IsFixed); 42560b57cec5SDimitry Andric Enum->setMayHaveOutOfDateDef(C.getLangOpts().Modules); 42570b57cec5SDimitry Andric C.getTypeDeclType(Enum, PrevDecl); 42580b57cec5SDimitry Andric return Enum; 42590b57cec5SDimitry Andric } 42600b57cec5SDimitry Andric 42610b57cec5SDimitry Andric EnumDecl *EnumDecl::CreateDeserialized(ASTContext &C, unsigned ID) { 42620b57cec5SDimitry Andric EnumDecl *Enum = 42630b57cec5SDimitry Andric new (C, ID) EnumDecl(C, nullptr, SourceLocation(), SourceLocation(), 42640b57cec5SDimitry Andric nullptr, nullptr, false, false, false); 42650b57cec5SDimitry Andric Enum->setMayHaveOutOfDateDef(C.getLangOpts().Modules); 42660b57cec5SDimitry Andric return Enum; 42670b57cec5SDimitry Andric } 42680b57cec5SDimitry Andric 42690b57cec5SDimitry Andric SourceRange EnumDecl::getIntegerTypeRange() const { 42700b57cec5SDimitry Andric if (const TypeSourceInfo *TI = getIntegerTypeSourceInfo()) 42710b57cec5SDimitry Andric return TI->getTypeLoc().getSourceRange(); 42720b57cec5SDimitry Andric return SourceRange(); 42730b57cec5SDimitry Andric } 42740b57cec5SDimitry Andric 42750b57cec5SDimitry Andric void EnumDecl::completeDefinition(QualType NewType, 42760b57cec5SDimitry Andric QualType NewPromotionType, 42770b57cec5SDimitry Andric unsigned NumPositiveBits, 42780b57cec5SDimitry Andric unsigned NumNegativeBits) { 42790b57cec5SDimitry Andric assert(!isCompleteDefinition() && "Cannot redefine enums!"); 42800b57cec5SDimitry Andric if (!IntegerType) 42810b57cec5SDimitry Andric IntegerType = NewType.getTypePtr(); 42820b57cec5SDimitry Andric PromotionType = NewPromotionType; 42830b57cec5SDimitry Andric setNumPositiveBits(NumPositiveBits); 42840b57cec5SDimitry Andric setNumNegativeBits(NumNegativeBits); 42850b57cec5SDimitry Andric TagDecl::completeDefinition(); 42860b57cec5SDimitry Andric } 42870b57cec5SDimitry Andric 42880b57cec5SDimitry Andric bool EnumDecl::isClosed() const { 42890b57cec5SDimitry Andric if (const auto *A = getAttr<EnumExtensibilityAttr>()) 42900b57cec5SDimitry Andric return A->getExtensibility() == EnumExtensibilityAttr::Closed; 42910b57cec5SDimitry Andric return true; 42920b57cec5SDimitry Andric } 42930b57cec5SDimitry Andric 42940b57cec5SDimitry Andric bool EnumDecl::isClosedFlag() const { 42950b57cec5SDimitry Andric return isClosed() && hasAttr<FlagEnumAttr>(); 42960b57cec5SDimitry Andric } 42970b57cec5SDimitry Andric 42980b57cec5SDimitry Andric bool EnumDecl::isClosedNonFlag() const { 42990b57cec5SDimitry Andric return isClosed() && !hasAttr<FlagEnumAttr>(); 43000b57cec5SDimitry Andric } 43010b57cec5SDimitry Andric 43020b57cec5SDimitry Andric TemplateSpecializationKind EnumDecl::getTemplateSpecializationKind() const { 43030b57cec5SDimitry Andric if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) 43040b57cec5SDimitry Andric return MSI->getTemplateSpecializationKind(); 43050b57cec5SDimitry Andric 43060b57cec5SDimitry Andric return TSK_Undeclared; 43070b57cec5SDimitry Andric } 43080b57cec5SDimitry Andric 43090b57cec5SDimitry Andric void EnumDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK, 43100b57cec5SDimitry Andric SourceLocation PointOfInstantiation) { 43110b57cec5SDimitry Andric MemberSpecializationInfo *MSI = getMemberSpecializationInfo(); 43120b57cec5SDimitry Andric assert(MSI && "Not an instantiated member enumeration?"); 43130b57cec5SDimitry Andric MSI->setTemplateSpecializationKind(TSK); 43140b57cec5SDimitry Andric if (TSK != TSK_ExplicitSpecialization && 43150b57cec5SDimitry Andric PointOfInstantiation.isValid() && 43160b57cec5SDimitry Andric MSI->getPointOfInstantiation().isInvalid()) 43170b57cec5SDimitry Andric MSI->setPointOfInstantiation(PointOfInstantiation); 43180b57cec5SDimitry Andric } 43190b57cec5SDimitry Andric 43200b57cec5SDimitry Andric EnumDecl *EnumDecl::getTemplateInstantiationPattern() const { 43210b57cec5SDimitry Andric if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) { 43220b57cec5SDimitry Andric if (isTemplateInstantiation(MSInfo->getTemplateSpecializationKind())) { 43230b57cec5SDimitry Andric EnumDecl *ED = getInstantiatedFromMemberEnum(); 43240b57cec5SDimitry Andric while (auto *NewED = ED->getInstantiatedFromMemberEnum()) 43250b57cec5SDimitry Andric ED = NewED; 43260b57cec5SDimitry Andric return getDefinitionOrSelf(ED); 43270b57cec5SDimitry Andric } 43280b57cec5SDimitry Andric } 43290b57cec5SDimitry Andric 43300b57cec5SDimitry Andric assert(!isTemplateInstantiation(getTemplateSpecializationKind()) && 43310b57cec5SDimitry Andric "couldn't find pattern for enum instantiation"); 43320b57cec5SDimitry Andric return nullptr; 43330b57cec5SDimitry Andric } 43340b57cec5SDimitry Andric 43350b57cec5SDimitry Andric EnumDecl *EnumDecl::getInstantiatedFromMemberEnum() const { 43360b57cec5SDimitry Andric if (SpecializationInfo) 43370b57cec5SDimitry Andric return cast<EnumDecl>(SpecializationInfo->getInstantiatedFrom()); 43380b57cec5SDimitry Andric 43390b57cec5SDimitry Andric return nullptr; 43400b57cec5SDimitry Andric } 43410b57cec5SDimitry Andric 43420b57cec5SDimitry Andric void EnumDecl::setInstantiationOfMemberEnum(ASTContext &C, EnumDecl *ED, 43430b57cec5SDimitry Andric TemplateSpecializationKind TSK) { 43440b57cec5SDimitry Andric assert(!SpecializationInfo && "Member enum is already a specialization"); 43450b57cec5SDimitry Andric SpecializationInfo = new (C) MemberSpecializationInfo(ED, TSK); 43460b57cec5SDimitry Andric } 43470b57cec5SDimitry Andric 43480b57cec5SDimitry Andric unsigned EnumDecl::getODRHash() { 43490b57cec5SDimitry Andric if (hasODRHash()) 43500b57cec5SDimitry Andric return ODRHash; 43510b57cec5SDimitry Andric 43520b57cec5SDimitry Andric class ODRHash Hash; 43530b57cec5SDimitry Andric Hash.AddEnumDecl(this); 43540b57cec5SDimitry Andric setHasODRHash(true); 43550b57cec5SDimitry Andric ODRHash = Hash.CalculateHash(); 43560b57cec5SDimitry Andric return ODRHash; 43570b57cec5SDimitry Andric } 43580b57cec5SDimitry Andric 43590b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 43600b57cec5SDimitry Andric // RecordDecl Implementation 43610b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 43620b57cec5SDimitry Andric 43630b57cec5SDimitry Andric RecordDecl::RecordDecl(Kind DK, TagKind TK, const ASTContext &C, 43640b57cec5SDimitry Andric DeclContext *DC, SourceLocation StartLoc, 43650b57cec5SDimitry Andric SourceLocation IdLoc, IdentifierInfo *Id, 43660b57cec5SDimitry Andric RecordDecl *PrevDecl) 43670b57cec5SDimitry Andric : TagDecl(DK, TK, C, DC, IdLoc, Id, PrevDecl, StartLoc) { 43680b57cec5SDimitry Andric assert(classof(static_cast<Decl *>(this)) && "Invalid Kind!"); 43690b57cec5SDimitry Andric setHasFlexibleArrayMember(false); 43700b57cec5SDimitry Andric setAnonymousStructOrUnion(false); 43710b57cec5SDimitry Andric setHasObjectMember(false); 43720b57cec5SDimitry Andric setHasVolatileMember(false); 43730b57cec5SDimitry Andric setHasLoadedFieldsFromExternalStorage(false); 43740b57cec5SDimitry Andric setNonTrivialToPrimitiveDefaultInitialize(false); 43750b57cec5SDimitry Andric setNonTrivialToPrimitiveCopy(false); 43760b57cec5SDimitry Andric setNonTrivialToPrimitiveDestroy(false); 43770b57cec5SDimitry Andric setHasNonTrivialToPrimitiveDefaultInitializeCUnion(false); 43780b57cec5SDimitry Andric setHasNonTrivialToPrimitiveDestructCUnion(false); 43790b57cec5SDimitry Andric setHasNonTrivialToPrimitiveCopyCUnion(false); 43800b57cec5SDimitry Andric setParamDestroyedInCallee(false); 43810b57cec5SDimitry Andric setArgPassingRestrictions(APK_CanPassInRegs); 43820b57cec5SDimitry Andric } 43830b57cec5SDimitry Andric 43840b57cec5SDimitry Andric RecordDecl *RecordDecl::Create(const ASTContext &C, TagKind TK, DeclContext *DC, 43850b57cec5SDimitry Andric SourceLocation StartLoc, SourceLocation IdLoc, 43860b57cec5SDimitry Andric IdentifierInfo *Id, RecordDecl* PrevDecl) { 43870b57cec5SDimitry Andric RecordDecl *R = new (C, DC) RecordDecl(Record, TK, C, DC, 43880b57cec5SDimitry Andric StartLoc, IdLoc, Id, PrevDecl); 43890b57cec5SDimitry Andric R->setMayHaveOutOfDateDef(C.getLangOpts().Modules); 43900b57cec5SDimitry Andric 43910b57cec5SDimitry Andric C.getTypeDeclType(R, PrevDecl); 43920b57cec5SDimitry Andric return R; 43930b57cec5SDimitry Andric } 43940b57cec5SDimitry Andric 43950b57cec5SDimitry Andric RecordDecl *RecordDecl::CreateDeserialized(const ASTContext &C, unsigned ID) { 43960b57cec5SDimitry Andric RecordDecl *R = 43970b57cec5SDimitry Andric new (C, ID) RecordDecl(Record, TTK_Struct, C, nullptr, SourceLocation(), 43980b57cec5SDimitry Andric SourceLocation(), nullptr, nullptr); 43990b57cec5SDimitry Andric R->setMayHaveOutOfDateDef(C.getLangOpts().Modules); 44000b57cec5SDimitry Andric return R; 44010b57cec5SDimitry Andric } 44020b57cec5SDimitry Andric 44030b57cec5SDimitry Andric bool RecordDecl::isInjectedClassName() const { 44040b57cec5SDimitry Andric return isImplicit() && getDeclName() && getDeclContext()->isRecord() && 44050b57cec5SDimitry Andric cast<RecordDecl>(getDeclContext())->getDeclName() == getDeclName(); 44060b57cec5SDimitry Andric } 44070b57cec5SDimitry Andric 44080b57cec5SDimitry Andric bool RecordDecl::isLambda() const { 44090b57cec5SDimitry Andric if (auto RD = dyn_cast<CXXRecordDecl>(this)) 44100b57cec5SDimitry Andric return RD->isLambda(); 44110b57cec5SDimitry Andric return false; 44120b57cec5SDimitry Andric } 44130b57cec5SDimitry Andric 44140b57cec5SDimitry Andric bool RecordDecl::isCapturedRecord() const { 44150b57cec5SDimitry Andric return hasAttr<CapturedRecordAttr>(); 44160b57cec5SDimitry Andric } 44170b57cec5SDimitry Andric 44180b57cec5SDimitry Andric void RecordDecl::setCapturedRecord() { 44190b57cec5SDimitry Andric addAttr(CapturedRecordAttr::CreateImplicit(getASTContext())); 44200b57cec5SDimitry Andric } 44210b57cec5SDimitry Andric 44225ffd83dbSDimitry Andric bool RecordDecl::isOrContainsUnion() const { 44235ffd83dbSDimitry Andric if (isUnion()) 44245ffd83dbSDimitry Andric return true; 44255ffd83dbSDimitry Andric 44265ffd83dbSDimitry Andric if (const RecordDecl *Def = getDefinition()) { 44275ffd83dbSDimitry Andric for (const FieldDecl *FD : Def->fields()) { 44285ffd83dbSDimitry Andric const RecordType *RT = FD->getType()->getAs<RecordType>(); 44295ffd83dbSDimitry Andric if (RT && RT->getDecl()->isOrContainsUnion()) 44305ffd83dbSDimitry Andric return true; 44315ffd83dbSDimitry Andric } 44325ffd83dbSDimitry Andric } 44335ffd83dbSDimitry Andric 44345ffd83dbSDimitry Andric return false; 44355ffd83dbSDimitry Andric } 44365ffd83dbSDimitry Andric 44370b57cec5SDimitry Andric RecordDecl::field_iterator RecordDecl::field_begin() const { 44380b57cec5SDimitry Andric if (hasExternalLexicalStorage() && !hasLoadedFieldsFromExternalStorage()) 44390b57cec5SDimitry Andric LoadFieldsFromExternalStorage(); 44400b57cec5SDimitry Andric 44410b57cec5SDimitry Andric return field_iterator(decl_iterator(FirstDecl)); 44420b57cec5SDimitry Andric } 44430b57cec5SDimitry Andric 44440b57cec5SDimitry Andric /// completeDefinition - Notes that the definition of this type is now 44450b57cec5SDimitry Andric /// complete. 44460b57cec5SDimitry Andric void RecordDecl::completeDefinition() { 44470b57cec5SDimitry Andric assert(!isCompleteDefinition() && "Cannot redefine record!"); 44480b57cec5SDimitry Andric TagDecl::completeDefinition(); 44490b57cec5SDimitry Andric } 44500b57cec5SDimitry Andric 44510b57cec5SDimitry Andric /// isMsStruct - Get whether or not this record uses ms_struct layout. 44520b57cec5SDimitry Andric /// This which can be turned on with an attribute, pragma, or the 44530b57cec5SDimitry Andric /// -mms-bitfields command-line option. 44540b57cec5SDimitry Andric bool RecordDecl::isMsStruct(const ASTContext &C) const { 44550b57cec5SDimitry Andric return hasAttr<MSStructAttr>() || C.getLangOpts().MSBitfields == 1; 44560b57cec5SDimitry Andric } 44570b57cec5SDimitry Andric 44580b57cec5SDimitry Andric void RecordDecl::LoadFieldsFromExternalStorage() const { 44590b57cec5SDimitry Andric ExternalASTSource *Source = getASTContext().getExternalSource(); 44600b57cec5SDimitry Andric assert(hasExternalLexicalStorage() && Source && "No external storage?"); 44610b57cec5SDimitry Andric 44620b57cec5SDimitry Andric // Notify that we have a RecordDecl doing some initialization. 44630b57cec5SDimitry Andric ExternalASTSource::Deserializing TheFields(Source); 44640b57cec5SDimitry Andric 44650b57cec5SDimitry Andric SmallVector<Decl*, 64> Decls; 44660b57cec5SDimitry Andric setHasLoadedFieldsFromExternalStorage(true); 44670b57cec5SDimitry Andric Source->FindExternalLexicalDecls(this, [](Decl::Kind K) { 44680b57cec5SDimitry Andric return FieldDecl::classofKind(K) || IndirectFieldDecl::classofKind(K); 44690b57cec5SDimitry Andric }, Decls); 44700b57cec5SDimitry Andric 44710b57cec5SDimitry Andric #ifndef NDEBUG 44720b57cec5SDimitry Andric // Check that all decls we got were FieldDecls. 44730b57cec5SDimitry Andric for (unsigned i=0, e=Decls.size(); i != e; ++i) 44740b57cec5SDimitry Andric assert(isa<FieldDecl>(Decls[i]) || isa<IndirectFieldDecl>(Decls[i])); 44750b57cec5SDimitry Andric #endif 44760b57cec5SDimitry Andric 44770b57cec5SDimitry Andric if (Decls.empty()) 44780b57cec5SDimitry Andric return; 44790b57cec5SDimitry Andric 44800b57cec5SDimitry Andric std::tie(FirstDecl, LastDecl) = BuildDeclChain(Decls, 44810b57cec5SDimitry Andric /*FieldsAlreadyLoaded=*/false); 44820b57cec5SDimitry Andric } 44830b57cec5SDimitry Andric 44840b57cec5SDimitry Andric bool RecordDecl::mayInsertExtraPadding(bool EmitRemark) const { 44850b57cec5SDimitry Andric ASTContext &Context = getASTContext(); 44860b57cec5SDimitry Andric const SanitizerMask EnabledAsanMask = Context.getLangOpts().Sanitize.Mask & 44870b57cec5SDimitry Andric (SanitizerKind::Address | SanitizerKind::KernelAddress); 44880b57cec5SDimitry Andric if (!EnabledAsanMask || !Context.getLangOpts().SanitizeAddressFieldPadding) 44890b57cec5SDimitry Andric return false; 44900b57cec5SDimitry Andric const auto &Blacklist = Context.getSanitizerBlacklist(); 44910b57cec5SDimitry Andric const auto *CXXRD = dyn_cast<CXXRecordDecl>(this); 44920b57cec5SDimitry Andric // We may be able to relax some of these requirements. 44930b57cec5SDimitry Andric int ReasonToReject = -1; 44940b57cec5SDimitry Andric if (!CXXRD || CXXRD->isExternCContext()) 44950b57cec5SDimitry Andric ReasonToReject = 0; // is not C++. 44960b57cec5SDimitry Andric else if (CXXRD->hasAttr<PackedAttr>()) 44970b57cec5SDimitry Andric ReasonToReject = 1; // is packed. 44980b57cec5SDimitry Andric else if (CXXRD->isUnion()) 44990b57cec5SDimitry Andric ReasonToReject = 2; // is a union. 45000b57cec5SDimitry Andric else if (CXXRD->isTriviallyCopyable()) 45010b57cec5SDimitry Andric ReasonToReject = 3; // is trivially copyable. 45020b57cec5SDimitry Andric else if (CXXRD->hasTrivialDestructor()) 45030b57cec5SDimitry Andric ReasonToReject = 4; // has trivial destructor. 45040b57cec5SDimitry Andric else if (CXXRD->isStandardLayout()) 45050b57cec5SDimitry Andric ReasonToReject = 5; // is standard layout. 45060b57cec5SDimitry Andric else if (Blacklist.isBlacklistedLocation(EnabledAsanMask, getLocation(), 45070b57cec5SDimitry Andric "field-padding")) 45085ffd83dbSDimitry Andric ReasonToReject = 6; // is in an excluded file. 45090b57cec5SDimitry Andric else if (Blacklist.isBlacklistedType(EnabledAsanMask, 45100b57cec5SDimitry Andric getQualifiedNameAsString(), 45110b57cec5SDimitry Andric "field-padding")) 45125ffd83dbSDimitry Andric ReasonToReject = 7; // The type is excluded. 45130b57cec5SDimitry Andric 45140b57cec5SDimitry Andric if (EmitRemark) { 45150b57cec5SDimitry Andric if (ReasonToReject >= 0) 45160b57cec5SDimitry Andric Context.getDiagnostics().Report( 45170b57cec5SDimitry Andric getLocation(), 45180b57cec5SDimitry Andric diag::remark_sanitize_address_insert_extra_padding_rejected) 45190b57cec5SDimitry Andric << getQualifiedNameAsString() << ReasonToReject; 45200b57cec5SDimitry Andric else 45210b57cec5SDimitry Andric Context.getDiagnostics().Report( 45220b57cec5SDimitry Andric getLocation(), 45230b57cec5SDimitry Andric diag::remark_sanitize_address_insert_extra_padding_accepted) 45240b57cec5SDimitry Andric << getQualifiedNameAsString(); 45250b57cec5SDimitry Andric } 45260b57cec5SDimitry Andric return ReasonToReject < 0; 45270b57cec5SDimitry Andric } 45280b57cec5SDimitry Andric 45290b57cec5SDimitry Andric const FieldDecl *RecordDecl::findFirstNamedDataMember() const { 45300b57cec5SDimitry Andric for (const auto *I : fields()) { 45310b57cec5SDimitry Andric if (I->getIdentifier()) 45320b57cec5SDimitry Andric return I; 45330b57cec5SDimitry Andric 45340b57cec5SDimitry Andric if (const auto *RT = I->getType()->getAs<RecordType>()) 45350b57cec5SDimitry Andric if (const FieldDecl *NamedDataMember = 45360b57cec5SDimitry Andric RT->getDecl()->findFirstNamedDataMember()) 45370b57cec5SDimitry Andric return NamedDataMember; 45380b57cec5SDimitry Andric } 45390b57cec5SDimitry Andric 45400b57cec5SDimitry Andric // We didn't find a named data member. 45410b57cec5SDimitry Andric return nullptr; 45420b57cec5SDimitry Andric } 45430b57cec5SDimitry Andric 45440b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 45450b57cec5SDimitry Andric // BlockDecl Implementation 45460b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 45470b57cec5SDimitry Andric 45480b57cec5SDimitry Andric BlockDecl::BlockDecl(DeclContext *DC, SourceLocation CaretLoc) 45490b57cec5SDimitry Andric : Decl(Block, DC, CaretLoc), DeclContext(Block) { 45500b57cec5SDimitry Andric setIsVariadic(false); 45510b57cec5SDimitry Andric setCapturesCXXThis(false); 45520b57cec5SDimitry Andric setBlockMissingReturnType(true); 45530b57cec5SDimitry Andric setIsConversionFromLambda(false); 45540b57cec5SDimitry Andric setDoesNotEscape(false); 45550b57cec5SDimitry Andric setCanAvoidCopyToHeap(false); 45560b57cec5SDimitry Andric } 45570b57cec5SDimitry Andric 45580b57cec5SDimitry Andric void BlockDecl::setParams(ArrayRef<ParmVarDecl *> NewParamInfo) { 45590b57cec5SDimitry Andric assert(!ParamInfo && "Already has param info!"); 45600b57cec5SDimitry Andric 45610b57cec5SDimitry Andric // Zero params -> null pointer. 45620b57cec5SDimitry Andric if (!NewParamInfo.empty()) { 45630b57cec5SDimitry Andric NumParams = NewParamInfo.size(); 45640b57cec5SDimitry Andric ParamInfo = new (getASTContext()) ParmVarDecl*[NewParamInfo.size()]; 45650b57cec5SDimitry Andric std::copy(NewParamInfo.begin(), NewParamInfo.end(), ParamInfo); 45660b57cec5SDimitry Andric } 45670b57cec5SDimitry Andric } 45680b57cec5SDimitry Andric 45690b57cec5SDimitry Andric void BlockDecl::setCaptures(ASTContext &Context, ArrayRef<Capture> Captures, 45700b57cec5SDimitry Andric bool CapturesCXXThis) { 45710b57cec5SDimitry Andric this->setCapturesCXXThis(CapturesCXXThis); 45720b57cec5SDimitry Andric this->NumCaptures = Captures.size(); 45730b57cec5SDimitry Andric 45740b57cec5SDimitry Andric if (Captures.empty()) { 45750b57cec5SDimitry Andric this->Captures = nullptr; 45760b57cec5SDimitry Andric return; 45770b57cec5SDimitry Andric } 45780b57cec5SDimitry Andric 45790b57cec5SDimitry Andric this->Captures = Captures.copy(Context).data(); 45800b57cec5SDimitry Andric } 45810b57cec5SDimitry Andric 45820b57cec5SDimitry Andric bool BlockDecl::capturesVariable(const VarDecl *variable) const { 45830b57cec5SDimitry Andric for (const auto &I : captures()) 45840b57cec5SDimitry Andric // Only auto vars can be captured, so no redeclaration worries. 45850b57cec5SDimitry Andric if (I.getVariable() == variable) 45860b57cec5SDimitry Andric return true; 45870b57cec5SDimitry Andric 45880b57cec5SDimitry Andric return false; 45890b57cec5SDimitry Andric } 45900b57cec5SDimitry Andric 45910b57cec5SDimitry Andric SourceRange BlockDecl::getSourceRange() const { 45920b57cec5SDimitry Andric return SourceRange(getLocation(), Body ? Body->getEndLoc() : getLocation()); 45930b57cec5SDimitry Andric } 45940b57cec5SDimitry Andric 45950b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 45960b57cec5SDimitry Andric // Other Decl Allocation/Deallocation Method Implementations 45970b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 45980b57cec5SDimitry Andric 45990b57cec5SDimitry Andric void TranslationUnitDecl::anchor() {} 46000b57cec5SDimitry Andric 46010b57cec5SDimitry Andric TranslationUnitDecl *TranslationUnitDecl::Create(ASTContext &C) { 46020b57cec5SDimitry Andric return new (C, (DeclContext *)nullptr) TranslationUnitDecl(C); 46030b57cec5SDimitry Andric } 46040b57cec5SDimitry Andric 46050b57cec5SDimitry Andric void PragmaCommentDecl::anchor() {} 46060b57cec5SDimitry Andric 46070b57cec5SDimitry Andric PragmaCommentDecl *PragmaCommentDecl::Create(const ASTContext &C, 46080b57cec5SDimitry Andric TranslationUnitDecl *DC, 46090b57cec5SDimitry Andric SourceLocation CommentLoc, 46100b57cec5SDimitry Andric PragmaMSCommentKind CommentKind, 46110b57cec5SDimitry Andric StringRef Arg) { 46120b57cec5SDimitry Andric PragmaCommentDecl *PCD = 46130b57cec5SDimitry Andric new (C, DC, additionalSizeToAlloc<char>(Arg.size() + 1)) 46140b57cec5SDimitry Andric PragmaCommentDecl(DC, CommentLoc, CommentKind); 46150b57cec5SDimitry Andric memcpy(PCD->getTrailingObjects<char>(), Arg.data(), Arg.size()); 46160b57cec5SDimitry Andric PCD->getTrailingObjects<char>()[Arg.size()] = '\0'; 46170b57cec5SDimitry Andric return PCD; 46180b57cec5SDimitry Andric } 46190b57cec5SDimitry Andric 46200b57cec5SDimitry Andric PragmaCommentDecl *PragmaCommentDecl::CreateDeserialized(ASTContext &C, 46210b57cec5SDimitry Andric unsigned ID, 46220b57cec5SDimitry Andric unsigned ArgSize) { 46230b57cec5SDimitry Andric return new (C, ID, additionalSizeToAlloc<char>(ArgSize + 1)) 46240b57cec5SDimitry Andric PragmaCommentDecl(nullptr, SourceLocation(), PCK_Unknown); 46250b57cec5SDimitry Andric } 46260b57cec5SDimitry Andric 46270b57cec5SDimitry Andric void PragmaDetectMismatchDecl::anchor() {} 46280b57cec5SDimitry Andric 46290b57cec5SDimitry Andric PragmaDetectMismatchDecl * 46300b57cec5SDimitry Andric PragmaDetectMismatchDecl::Create(const ASTContext &C, TranslationUnitDecl *DC, 46310b57cec5SDimitry Andric SourceLocation Loc, StringRef Name, 46320b57cec5SDimitry Andric StringRef Value) { 46330b57cec5SDimitry Andric size_t ValueStart = Name.size() + 1; 46340b57cec5SDimitry Andric PragmaDetectMismatchDecl *PDMD = 46350b57cec5SDimitry Andric new (C, DC, additionalSizeToAlloc<char>(ValueStart + Value.size() + 1)) 46360b57cec5SDimitry Andric PragmaDetectMismatchDecl(DC, Loc, ValueStart); 46370b57cec5SDimitry Andric memcpy(PDMD->getTrailingObjects<char>(), Name.data(), Name.size()); 46380b57cec5SDimitry Andric PDMD->getTrailingObjects<char>()[Name.size()] = '\0'; 46390b57cec5SDimitry Andric memcpy(PDMD->getTrailingObjects<char>() + ValueStart, Value.data(), 46400b57cec5SDimitry Andric Value.size()); 46410b57cec5SDimitry Andric PDMD->getTrailingObjects<char>()[ValueStart + Value.size()] = '\0'; 46420b57cec5SDimitry Andric return PDMD; 46430b57cec5SDimitry Andric } 46440b57cec5SDimitry Andric 46450b57cec5SDimitry Andric PragmaDetectMismatchDecl * 46460b57cec5SDimitry Andric PragmaDetectMismatchDecl::CreateDeserialized(ASTContext &C, unsigned ID, 46470b57cec5SDimitry Andric unsigned NameValueSize) { 46480b57cec5SDimitry Andric return new (C, ID, additionalSizeToAlloc<char>(NameValueSize + 1)) 46490b57cec5SDimitry Andric PragmaDetectMismatchDecl(nullptr, SourceLocation(), 0); 46500b57cec5SDimitry Andric } 46510b57cec5SDimitry Andric 46520b57cec5SDimitry Andric void ExternCContextDecl::anchor() {} 46530b57cec5SDimitry Andric 46540b57cec5SDimitry Andric ExternCContextDecl *ExternCContextDecl::Create(const ASTContext &C, 46550b57cec5SDimitry Andric TranslationUnitDecl *DC) { 46560b57cec5SDimitry Andric return new (C, DC) ExternCContextDecl(DC); 46570b57cec5SDimitry Andric } 46580b57cec5SDimitry Andric 46590b57cec5SDimitry Andric void LabelDecl::anchor() {} 46600b57cec5SDimitry Andric 46610b57cec5SDimitry Andric LabelDecl *LabelDecl::Create(ASTContext &C, DeclContext *DC, 46620b57cec5SDimitry Andric SourceLocation IdentL, IdentifierInfo *II) { 46630b57cec5SDimitry Andric return new (C, DC) LabelDecl(DC, IdentL, II, nullptr, IdentL); 46640b57cec5SDimitry Andric } 46650b57cec5SDimitry Andric 46660b57cec5SDimitry Andric LabelDecl *LabelDecl::Create(ASTContext &C, DeclContext *DC, 46670b57cec5SDimitry Andric SourceLocation IdentL, IdentifierInfo *II, 46680b57cec5SDimitry Andric SourceLocation GnuLabelL) { 46690b57cec5SDimitry Andric assert(GnuLabelL != IdentL && "Use this only for GNU local labels"); 46700b57cec5SDimitry Andric return new (C, DC) LabelDecl(DC, IdentL, II, nullptr, GnuLabelL); 46710b57cec5SDimitry Andric } 46720b57cec5SDimitry Andric 46730b57cec5SDimitry Andric LabelDecl *LabelDecl::CreateDeserialized(ASTContext &C, unsigned ID) { 46740b57cec5SDimitry Andric return new (C, ID) LabelDecl(nullptr, SourceLocation(), nullptr, nullptr, 46750b57cec5SDimitry Andric SourceLocation()); 46760b57cec5SDimitry Andric } 46770b57cec5SDimitry Andric 46780b57cec5SDimitry Andric void LabelDecl::setMSAsmLabel(StringRef Name) { 46790b57cec5SDimitry Andric char *Buffer = new (getASTContext(), 1) char[Name.size() + 1]; 46800b57cec5SDimitry Andric memcpy(Buffer, Name.data(), Name.size()); 46810b57cec5SDimitry Andric Buffer[Name.size()] = '\0'; 46820b57cec5SDimitry Andric MSAsmName = Buffer; 46830b57cec5SDimitry Andric } 46840b57cec5SDimitry Andric 46850b57cec5SDimitry Andric void ValueDecl::anchor() {} 46860b57cec5SDimitry Andric 46870b57cec5SDimitry Andric bool ValueDecl::isWeak() const { 46880b57cec5SDimitry Andric for (const auto *I : attrs()) 46890b57cec5SDimitry Andric if (isa<WeakAttr>(I) || isa<WeakRefAttr>(I)) 46900b57cec5SDimitry Andric return true; 46910b57cec5SDimitry Andric 46920b57cec5SDimitry Andric return isWeakImported(); 46930b57cec5SDimitry Andric } 46940b57cec5SDimitry Andric 46950b57cec5SDimitry Andric void ImplicitParamDecl::anchor() {} 46960b57cec5SDimitry Andric 46970b57cec5SDimitry Andric ImplicitParamDecl *ImplicitParamDecl::Create(ASTContext &C, DeclContext *DC, 46980b57cec5SDimitry Andric SourceLocation IdLoc, 46990b57cec5SDimitry Andric IdentifierInfo *Id, QualType Type, 47000b57cec5SDimitry Andric ImplicitParamKind ParamKind) { 47010b57cec5SDimitry Andric return new (C, DC) ImplicitParamDecl(C, DC, IdLoc, Id, Type, ParamKind); 47020b57cec5SDimitry Andric } 47030b57cec5SDimitry Andric 47040b57cec5SDimitry Andric ImplicitParamDecl *ImplicitParamDecl::Create(ASTContext &C, QualType Type, 47050b57cec5SDimitry Andric ImplicitParamKind ParamKind) { 47060b57cec5SDimitry Andric return new (C, nullptr) ImplicitParamDecl(C, Type, ParamKind); 47070b57cec5SDimitry Andric } 47080b57cec5SDimitry Andric 47090b57cec5SDimitry Andric ImplicitParamDecl *ImplicitParamDecl::CreateDeserialized(ASTContext &C, 47100b57cec5SDimitry Andric unsigned ID) { 47110b57cec5SDimitry Andric return new (C, ID) ImplicitParamDecl(C, QualType(), ImplicitParamKind::Other); 47120b57cec5SDimitry Andric } 47130b57cec5SDimitry Andric 47140b57cec5SDimitry Andric FunctionDecl *FunctionDecl::Create(ASTContext &C, DeclContext *DC, 47150b57cec5SDimitry Andric SourceLocation StartLoc, 47160b57cec5SDimitry Andric const DeclarationNameInfo &NameInfo, 47170b57cec5SDimitry Andric QualType T, TypeSourceInfo *TInfo, 47180b57cec5SDimitry Andric StorageClass SC, bool isInlineSpecified, 47190b57cec5SDimitry Andric bool hasWrittenPrototype, 4720480093f4SDimitry Andric ConstexprSpecKind ConstexprKind, 4721480093f4SDimitry Andric Expr *TrailingRequiresClause) { 47220b57cec5SDimitry Andric FunctionDecl *New = 47230b57cec5SDimitry Andric new (C, DC) FunctionDecl(Function, C, DC, StartLoc, NameInfo, T, TInfo, 4724480093f4SDimitry Andric SC, isInlineSpecified, ConstexprKind, 4725480093f4SDimitry Andric TrailingRequiresClause); 47260b57cec5SDimitry Andric New->setHasWrittenPrototype(hasWrittenPrototype); 47270b57cec5SDimitry Andric return New; 47280b57cec5SDimitry Andric } 47290b57cec5SDimitry Andric 47300b57cec5SDimitry Andric FunctionDecl *FunctionDecl::CreateDeserialized(ASTContext &C, unsigned ID) { 47310b57cec5SDimitry Andric return new (C, ID) FunctionDecl(Function, C, nullptr, SourceLocation(), 47320b57cec5SDimitry Andric DeclarationNameInfo(), QualType(), nullptr, 4733480093f4SDimitry Andric SC_None, false, CSK_unspecified, nullptr); 47340b57cec5SDimitry Andric } 47350b57cec5SDimitry Andric 47360b57cec5SDimitry Andric BlockDecl *BlockDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L) { 47370b57cec5SDimitry Andric return new (C, DC) BlockDecl(DC, L); 47380b57cec5SDimitry Andric } 47390b57cec5SDimitry Andric 47400b57cec5SDimitry Andric BlockDecl *BlockDecl::CreateDeserialized(ASTContext &C, unsigned ID) { 47410b57cec5SDimitry Andric return new (C, ID) BlockDecl(nullptr, SourceLocation()); 47420b57cec5SDimitry Andric } 47430b57cec5SDimitry Andric 47440b57cec5SDimitry Andric CapturedDecl::CapturedDecl(DeclContext *DC, unsigned NumParams) 47450b57cec5SDimitry Andric : Decl(Captured, DC, SourceLocation()), DeclContext(Captured), 47460b57cec5SDimitry Andric NumParams(NumParams), ContextParam(0), BodyAndNothrow(nullptr, false) {} 47470b57cec5SDimitry Andric 47480b57cec5SDimitry Andric CapturedDecl *CapturedDecl::Create(ASTContext &C, DeclContext *DC, 47490b57cec5SDimitry Andric unsigned NumParams) { 47500b57cec5SDimitry Andric return new (C, DC, additionalSizeToAlloc<ImplicitParamDecl *>(NumParams)) 47510b57cec5SDimitry Andric CapturedDecl(DC, NumParams); 47520b57cec5SDimitry Andric } 47530b57cec5SDimitry Andric 47540b57cec5SDimitry Andric CapturedDecl *CapturedDecl::CreateDeserialized(ASTContext &C, unsigned ID, 47550b57cec5SDimitry Andric unsigned NumParams) { 47560b57cec5SDimitry Andric return new (C, ID, additionalSizeToAlloc<ImplicitParamDecl *>(NumParams)) 47570b57cec5SDimitry Andric CapturedDecl(nullptr, NumParams); 47580b57cec5SDimitry Andric } 47590b57cec5SDimitry Andric 47600b57cec5SDimitry Andric Stmt *CapturedDecl::getBody() const { return BodyAndNothrow.getPointer(); } 47610b57cec5SDimitry Andric void CapturedDecl::setBody(Stmt *B) { BodyAndNothrow.setPointer(B); } 47620b57cec5SDimitry Andric 47630b57cec5SDimitry Andric bool CapturedDecl::isNothrow() const { return BodyAndNothrow.getInt(); } 47640b57cec5SDimitry Andric void CapturedDecl::setNothrow(bool Nothrow) { BodyAndNothrow.setInt(Nothrow); } 47650b57cec5SDimitry Andric 47660b57cec5SDimitry Andric EnumConstantDecl *EnumConstantDecl::Create(ASTContext &C, EnumDecl *CD, 47670b57cec5SDimitry Andric SourceLocation L, 47680b57cec5SDimitry Andric IdentifierInfo *Id, QualType T, 47690b57cec5SDimitry Andric Expr *E, const llvm::APSInt &V) { 47700b57cec5SDimitry Andric return new (C, CD) EnumConstantDecl(CD, L, Id, T, E, V); 47710b57cec5SDimitry Andric } 47720b57cec5SDimitry Andric 47730b57cec5SDimitry Andric EnumConstantDecl * 47740b57cec5SDimitry Andric EnumConstantDecl::CreateDeserialized(ASTContext &C, unsigned ID) { 47750b57cec5SDimitry Andric return new (C, ID) EnumConstantDecl(nullptr, SourceLocation(), nullptr, 47760b57cec5SDimitry Andric QualType(), nullptr, llvm::APSInt()); 47770b57cec5SDimitry Andric } 47780b57cec5SDimitry Andric 47790b57cec5SDimitry Andric void IndirectFieldDecl::anchor() {} 47800b57cec5SDimitry Andric 47810b57cec5SDimitry Andric IndirectFieldDecl::IndirectFieldDecl(ASTContext &C, DeclContext *DC, 47820b57cec5SDimitry Andric SourceLocation L, DeclarationName N, 47830b57cec5SDimitry Andric QualType T, 47840b57cec5SDimitry Andric MutableArrayRef<NamedDecl *> CH) 47850b57cec5SDimitry Andric : ValueDecl(IndirectField, DC, L, N, T), Chaining(CH.data()), 47860b57cec5SDimitry Andric ChainingSize(CH.size()) { 47870b57cec5SDimitry Andric // In C++, indirect field declarations conflict with tag declarations in the 47880b57cec5SDimitry Andric // same scope, so add them to IDNS_Tag so that tag redeclaration finds them. 47890b57cec5SDimitry Andric if (C.getLangOpts().CPlusPlus) 47900b57cec5SDimitry Andric IdentifierNamespace |= IDNS_Tag; 47910b57cec5SDimitry Andric } 47920b57cec5SDimitry Andric 47930b57cec5SDimitry Andric IndirectFieldDecl * 47940b57cec5SDimitry Andric IndirectFieldDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L, 47950b57cec5SDimitry Andric IdentifierInfo *Id, QualType T, 47960b57cec5SDimitry Andric llvm::MutableArrayRef<NamedDecl *> CH) { 47970b57cec5SDimitry Andric return new (C, DC) IndirectFieldDecl(C, DC, L, Id, T, CH); 47980b57cec5SDimitry Andric } 47990b57cec5SDimitry Andric 48000b57cec5SDimitry Andric IndirectFieldDecl *IndirectFieldDecl::CreateDeserialized(ASTContext &C, 48010b57cec5SDimitry Andric unsigned ID) { 48020b57cec5SDimitry Andric return new (C, ID) IndirectFieldDecl(C, nullptr, SourceLocation(), 48030b57cec5SDimitry Andric DeclarationName(), QualType(), None); 48040b57cec5SDimitry Andric } 48050b57cec5SDimitry Andric 48060b57cec5SDimitry Andric SourceRange EnumConstantDecl::getSourceRange() const { 48070b57cec5SDimitry Andric SourceLocation End = getLocation(); 48080b57cec5SDimitry Andric if (Init) 48090b57cec5SDimitry Andric End = Init->getEndLoc(); 48100b57cec5SDimitry Andric return SourceRange(getLocation(), End); 48110b57cec5SDimitry Andric } 48120b57cec5SDimitry Andric 48130b57cec5SDimitry Andric void TypeDecl::anchor() {} 48140b57cec5SDimitry Andric 48150b57cec5SDimitry Andric TypedefDecl *TypedefDecl::Create(ASTContext &C, DeclContext *DC, 48160b57cec5SDimitry Andric SourceLocation StartLoc, SourceLocation IdLoc, 48170b57cec5SDimitry Andric IdentifierInfo *Id, TypeSourceInfo *TInfo) { 48180b57cec5SDimitry Andric return new (C, DC) TypedefDecl(C, DC, StartLoc, IdLoc, Id, TInfo); 48190b57cec5SDimitry Andric } 48200b57cec5SDimitry Andric 48210b57cec5SDimitry Andric void TypedefNameDecl::anchor() {} 48220b57cec5SDimitry Andric 48230b57cec5SDimitry Andric TagDecl *TypedefNameDecl::getAnonDeclWithTypedefName(bool AnyRedecl) const { 48240b57cec5SDimitry Andric if (auto *TT = getTypeSourceInfo()->getType()->getAs<TagType>()) { 48250b57cec5SDimitry Andric auto *OwningTypedef = TT->getDecl()->getTypedefNameForAnonDecl(); 48260b57cec5SDimitry Andric auto *ThisTypedef = this; 48270b57cec5SDimitry Andric if (AnyRedecl && OwningTypedef) { 48280b57cec5SDimitry Andric OwningTypedef = OwningTypedef->getCanonicalDecl(); 48290b57cec5SDimitry Andric ThisTypedef = ThisTypedef->getCanonicalDecl(); 48300b57cec5SDimitry Andric } 48310b57cec5SDimitry Andric if (OwningTypedef == ThisTypedef) 48320b57cec5SDimitry Andric return TT->getDecl(); 48330b57cec5SDimitry Andric } 48340b57cec5SDimitry Andric 48350b57cec5SDimitry Andric return nullptr; 48360b57cec5SDimitry Andric } 48370b57cec5SDimitry Andric 48380b57cec5SDimitry Andric bool TypedefNameDecl::isTransparentTagSlow() const { 48390b57cec5SDimitry Andric auto determineIsTransparent = [&]() { 48400b57cec5SDimitry Andric if (auto *TT = getUnderlyingType()->getAs<TagType>()) { 48410b57cec5SDimitry Andric if (auto *TD = TT->getDecl()) { 48420b57cec5SDimitry Andric if (TD->getName() != getName()) 48430b57cec5SDimitry Andric return false; 48440b57cec5SDimitry Andric SourceLocation TTLoc = getLocation(); 48450b57cec5SDimitry Andric SourceLocation TDLoc = TD->getLocation(); 48460b57cec5SDimitry Andric if (!TTLoc.isMacroID() || !TDLoc.isMacroID()) 48470b57cec5SDimitry Andric return false; 48480b57cec5SDimitry Andric SourceManager &SM = getASTContext().getSourceManager(); 48490b57cec5SDimitry Andric return SM.getSpellingLoc(TTLoc) == SM.getSpellingLoc(TDLoc); 48500b57cec5SDimitry Andric } 48510b57cec5SDimitry Andric } 48520b57cec5SDimitry Andric return false; 48530b57cec5SDimitry Andric }; 48540b57cec5SDimitry Andric 48550b57cec5SDimitry Andric bool isTransparent = determineIsTransparent(); 48560b57cec5SDimitry Andric MaybeModedTInfo.setInt((isTransparent << 1) | 1); 48570b57cec5SDimitry Andric return isTransparent; 48580b57cec5SDimitry Andric } 48590b57cec5SDimitry Andric 48600b57cec5SDimitry Andric TypedefDecl *TypedefDecl::CreateDeserialized(ASTContext &C, unsigned ID) { 48610b57cec5SDimitry Andric return new (C, ID) TypedefDecl(C, nullptr, SourceLocation(), SourceLocation(), 48620b57cec5SDimitry Andric nullptr, nullptr); 48630b57cec5SDimitry Andric } 48640b57cec5SDimitry Andric 48650b57cec5SDimitry Andric TypeAliasDecl *TypeAliasDecl::Create(ASTContext &C, DeclContext *DC, 48660b57cec5SDimitry Andric SourceLocation StartLoc, 48670b57cec5SDimitry Andric SourceLocation IdLoc, IdentifierInfo *Id, 48680b57cec5SDimitry Andric TypeSourceInfo *TInfo) { 48690b57cec5SDimitry Andric return new (C, DC) TypeAliasDecl(C, DC, StartLoc, IdLoc, Id, TInfo); 48700b57cec5SDimitry Andric } 48710b57cec5SDimitry Andric 48720b57cec5SDimitry Andric TypeAliasDecl *TypeAliasDecl::CreateDeserialized(ASTContext &C, unsigned ID) { 48730b57cec5SDimitry Andric return new (C, ID) TypeAliasDecl(C, nullptr, SourceLocation(), 48740b57cec5SDimitry Andric SourceLocation(), nullptr, nullptr); 48750b57cec5SDimitry Andric } 48760b57cec5SDimitry Andric 48770b57cec5SDimitry Andric SourceRange TypedefDecl::getSourceRange() const { 48780b57cec5SDimitry Andric SourceLocation RangeEnd = getLocation(); 48790b57cec5SDimitry Andric if (TypeSourceInfo *TInfo = getTypeSourceInfo()) { 48800b57cec5SDimitry Andric if (typeIsPostfix(TInfo->getType())) 48810b57cec5SDimitry Andric RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd(); 48820b57cec5SDimitry Andric } 48830b57cec5SDimitry Andric return SourceRange(getBeginLoc(), RangeEnd); 48840b57cec5SDimitry Andric } 48850b57cec5SDimitry Andric 48860b57cec5SDimitry Andric SourceRange TypeAliasDecl::getSourceRange() const { 48870b57cec5SDimitry Andric SourceLocation RangeEnd = getBeginLoc(); 48880b57cec5SDimitry Andric if (TypeSourceInfo *TInfo = getTypeSourceInfo()) 48890b57cec5SDimitry Andric RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd(); 48900b57cec5SDimitry Andric return SourceRange(getBeginLoc(), RangeEnd); 48910b57cec5SDimitry Andric } 48920b57cec5SDimitry Andric 48930b57cec5SDimitry Andric void FileScopeAsmDecl::anchor() {} 48940b57cec5SDimitry Andric 48950b57cec5SDimitry Andric FileScopeAsmDecl *FileScopeAsmDecl::Create(ASTContext &C, DeclContext *DC, 48960b57cec5SDimitry Andric StringLiteral *Str, 48970b57cec5SDimitry Andric SourceLocation AsmLoc, 48980b57cec5SDimitry Andric SourceLocation RParenLoc) { 48990b57cec5SDimitry Andric return new (C, DC) FileScopeAsmDecl(DC, Str, AsmLoc, RParenLoc); 49000b57cec5SDimitry Andric } 49010b57cec5SDimitry Andric 49020b57cec5SDimitry Andric FileScopeAsmDecl *FileScopeAsmDecl::CreateDeserialized(ASTContext &C, 49030b57cec5SDimitry Andric unsigned ID) { 49040b57cec5SDimitry Andric return new (C, ID) FileScopeAsmDecl(nullptr, nullptr, SourceLocation(), 49050b57cec5SDimitry Andric SourceLocation()); 49060b57cec5SDimitry Andric } 49070b57cec5SDimitry Andric 49080b57cec5SDimitry Andric void EmptyDecl::anchor() {} 49090b57cec5SDimitry Andric 49100b57cec5SDimitry Andric EmptyDecl *EmptyDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L) { 49110b57cec5SDimitry Andric return new (C, DC) EmptyDecl(DC, L); 49120b57cec5SDimitry Andric } 49130b57cec5SDimitry Andric 49140b57cec5SDimitry Andric EmptyDecl *EmptyDecl::CreateDeserialized(ASTContext &C, unsigned ID) { 49150b57cec5SDimitry Andric return new (C, ID) EmptyDecl(nullptr, SourceLocation()); 49160b57cec5SDimitry Andric } 49170b57cec5SDimitry Andric 49180b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 49190b57cec5SDimitry Andric // ImportDecl Implementation 49200b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 49210b57cec5SDimitry Andric 49220b57cec5SDimitry Andric /// Retrieve the number of module identifiers needed to name the given 49230b57cec5SDimitry Andric /// module. 49240b57cec5SDimitry Andric static unsigned getNumModuleIdentifiers(Module *Mod) { 49250b57cec5SDimitry Andric unsigned Result = 1; 49260b57cec5SDimitry Andric while (Mod->Parent) { 49270b57cec5SDimitry Andric Mod = Mod->Parent; 49280b57cec5SDimitry Andric ++Result; 49290b57cec5SDimitry Andric } 49300b57cec5SDimitry Andric return Result; 49310b57cec5SDimitry Andric } 49320b57cec5SDimitry Andric 49330b57cec5SDimitry Andric ImportDecl::ImportDecl(DeclContext *DC, SourceLocation StartLoc, 49340b57cec5SDimitry Andric Module *Imported, 49350b57cec5SDimitry Andric ArrayRef<SourceLocation> IdentifierLocs) 49365ffd83dbSDimitry Andric : Decl(Import, DC, StartLoc), ImportedModule(Imported), 49375ffd83dbSDimitry Andric NextLocalImportAndComplete(nullptr, true) { 49380b57cec5SDimitry Andric assert(getNumModuleIdentifiers(Imported) == IdentifierLocs.size()); 49390b57cec5SDimitry Andric auto *StoredLocs = getTrailingObjects<SourceLocation>(); 49400b57cec5SDimitry Andric std::uninitialized_copy(IdentifierLocs.begin(), IdentifierLocs.end(), 49410b57cec5SDimitry Andric StoredLocs); 49420b57cec5SDimitry Andric } 49430b57cec5SDimitry Andric 49440b57cec5SDimitry Andric ImportDecl::ImportDecl(DeclContext *DC, SourceLocation StartLoc, 49450b57cec5SDimitry Andric Module *Imported, SourceLocation EndLoc) 49465ffd83dbSDimitry Andric : Decl(Import, DC, StartLoc), ImportedModule(Imported), 49475ffd83dbSDimitry Andric NextLocalImportAndComplete(nullptr, false) { 49480b57cec5SDimitry Andric *getTrailingObjects<SourceLocation>() = EndLoc; 49490b57cec5SDimitry Andric } 49500b57cec5SDimitry Andric 49510b57cec5SDimitry Andric ImportDecl *ImportDecl::Create(ASTContext &C, DeclContext *DC, 49520b57cec5SDimitry Andric SourceLocation StartLoc, Module *Imported, 49530b57cec5SDimitry Andric ArrayRef<SourceLocation> IdentifierLocs) { 49540b57cec5SDimitry Andric return new (C, DC, 49550b57cec5SDimitry Andric additionalSizeToAlloc<SourceLocation>(IdentifierLocs.size())) 49560b57cec5SDimitry Andric ImportDecl(DC, StartLoc, Imported, IdentifierLocs); 49570b57cec5SDimitry Andric } 49580b57cec5SDimitry Andric 49590b57cec5SDimitry Andric ImportDecl *ImportDecl::CreateImplicit(ASTContext &C, DeclContext *DC, 49600b57cec5SDimitry Andric SourceLocation StartLoc, 49610b57cec5SDimitry Andric Module *Imported, 49620b57cec5SDimitry Andric SourceLocation EndLoc) { 49630b57cec5SDimitry Andric ImportDecl *Import = new (C, DC, additionalSizeToAlloc<SourceLocation>(1)) 49640b57cec5SDimitry Andric ImportDecl(DC, StartLoc, Imported, EndLoc); 49650b57cec5SDimitry Andric Import->setImplicit(); 49660b57cec5SDimitry Andric return Import; 49670b57cec5SDimitry Andric } 49680b57cec5SDimitry Andric 49690b57cec5SDimitry Andric ImportDecl *ImportDecl::CreateDeserialized(ASTContext &C, unsigned ID, 49700b57cec5SDimitry Andric unsigned NumLocations) { 49710b57cec5SDimitry Andric return new (C, ID, additionalSizeToAlloc<SourceLocation>(NumLocations)) 49720b57cec5SDimitry Andric ImportDecl(EmptyShell()); 49730b57cec5SDimitry Andric } 49740b57cec5SDimitry Andric 49750b57cec5SDimitry Andric ArrayRef<SourceLocation> ImportDecl::getIdentifierLocs() const { 49765ffd83dbSDimitry Andric if (!isImportComplete()) 49770b57cec5SDimitry Andric return None; 49780b57cec5SDimitry Andric 49790b57cec5SDimitry Andric const auto *StoredLocs = getTrailingObjects<SourceLocation>(); 49800b57cec5SDimitry Andric return llvm::makeArrayRef(StoredLocs, 49810b57cec5SDimitry Andric getNumModuleIdentifiers(getImportedModule())); 49820b57cec5SDimitry Andric } 49830b57cec5SDimitry Andric 49840b57cec5SDimitry Andric SourceRange ImportDecl::getSourceRange() const { 49855ffd83dbSDimitry Andric if (!isImportComplete()) 49860b57cec5SDimitry Andric return SourceRange(getLocation(), *getTrailingObjects<SourceLocation>()); 49870b57cec5SDimitry Andric 49880b57cec5SDimitry Andric return SourceRange(getLocation(), getIdentifierLocs().back()); 49890b57cec5SDimitry Andric } 49900b57cec5SDimitry Andric 49910b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 49920b57cec5SDimitry Andric // ExportDecl Implementation 49930b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 49940b57cec5SDimitry Andric 49950b57cec5SDimitry Andric void ExportDecl::anchor() {} 49960b57cec5SDimitry Andric 49970b57cec5SDimitry Andric ExportDecl *ExportDecl::Create(ASTContext &C, DeclContext *DC, 49980b57cec5SDimitry Andric SourceLocation ExportLoc) { 49990b57cec5SDimitry Andric return new (C, DC) ExportDecl(DC, ExportLoc); 50000b57cec5SDimitry Andric } 50010b57cec5SDimitry Andric 50020b57cec5SDimitry Andric ExportDecl *ExportDecl::CreateDeserialized(ASTContext &C, unsigned ID) { 50030b57cec5SDimitry Andric return new (C, ID) ExportDecl(nullptr, SourceLocation()); 50040b57cec5SDimitry Andric } 5005