ASTContext.cpp revision 0e88aa7100da32acc63bc8a4dcb946ed517868f1
1cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)//===--- ASTContext.cpp - Context to hold long-lived AST nodes ------------===// 2cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)// 3cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)// The LLVM Compiler Infrastructure 4cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)// 5cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)// This file is distributed under the University of Illinois Open Source 6cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)// License. See LICENSE.TXT for details. 7cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)// 8cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)//===----------------------------------------------------------------------===// 9cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)// 10cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)// This file implements the ASTContext interface. 11cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)// 12cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)//===----------------------------------------------------------------------===// 13cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 14cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "clang/AST/ASTContext.h" 15cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "clang/AST/CharUnits.h" 16cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "clang/AST/DeclCXX.h" 17cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "clang/AST/DeclObjC.h" 18cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "clang/AST/DeclTemplate.h" 19cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "clang/AST/TypeLoc.h" 20cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "clang/AST/Expr.h" 21cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "clang/AST/ExprCXX.h" 22cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "clang/AST/ExternalASTSource.h" 23cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "clang/AST/ASTMutationListener.h" 24cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "clang/AST/RecordLayout.h" 25cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "clang/Basic/Builtins.h" 26cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "clang/Basic/SourceManager.h" 27cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "clang/Basic/TargetInfo.h" 28cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "llvm/ADT/SmallString.h" 29cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "llvm/ADT/StringExtras.h" 30cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "llvm/Support/MathExtras.h" 31cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "llvm/Support/raw_ostream.h" 32cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "CXXABI.h" 33cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 34cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)using namespace clang; 35cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 36cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)unsigned ASTContext::NumImplicitDefaultConstructors; 37cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)unsigned ASTContext::NumImplicitDefaultConstructorsDeclared; 38cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)unsigned ASTContext::NumImplicitCopyConstructors; 39cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)unsigned ASTContext::NumImplicitCopyConstructorsDeclared; 40cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)unsigned ASTContext::NumImplicitCopyAssignmentOperators; 41cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)unsigned ASTContext::NumImplicitCopyAssignmentOperatorsDeclared; 42cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)unsigned ASTContext::NumImplicitDestructors; 43cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)unsigned ASTContext::NumImplicitDestructorsDeclared; 44cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 45cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)enum FloatingRank { 4646d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) FloatRank, DoubleRank, LongDoubleRank 47cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)}; 48cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 49cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)void 50cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)ASTContext::CanonicalTemplateTemplateParm::Profile(llvm::FoldingSetNodeID &ID, 51cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) TemplateTemplateParmDecl *Parm) { 5246d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) ID.AddInteger(Parm->getDepth()); 5346d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) ID.AddInteger(Parm->getPosition()); 5446d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) // FIXME: Parameter pack 5546d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) 56cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) TemplateParameterList *Params = Parm->getTemplateParameters(); 57cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) ID.AddInteger(Params->size()); 58cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) for (TemplateParameterList::const_iterator P = Params->begin(), 59cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) PEnd = Params->end(); 60cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) P != PEnd; ++P) { 61cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) { 62cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) ID.AddInteger(0); 63cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) ID.AddBoolean(TTP->isParameterPack()); 64cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) continue; 65cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) } 66cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 67cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 68cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) ID.AddInteger(1); 69cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // FIXME: Parameter pack 70cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) ID.AddPointer(NTTP->getType().getAsOpaquePtr()); 71cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) continue; 72cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) } 73cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 74cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P); 75cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) ID.AddInteger(2); 76cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) Profile(ID, TTP); 77cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) } 78cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)} 79cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 80cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)TemplateTemplateParmDecl * 81cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)ASTContext::getCanonicalTemplateTemplateParmDecl( 82cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) TemplateTemplateParmDecl *TTP) { 83cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Check if we already have a canonical template template parameter. 84cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) llvm::FoldingSetNodeID ID; 85cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) CanonicalTemplateTemplateParm::Profile(ID, TTP); 86cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) void *InsertPos = 0; 87cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) CanonicalTemplateTemplateParm *Canonical 88cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 89cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (Canonical) 90cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) return Canonical->getParam(); 91cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 92cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Build a canonical template parameter list. 93cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) TemplateParameterList *Params = TTP->getTemplateParameters(); 94cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) llvm::SmallVector<NamedDecl *, 4> CanonParams; 95cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) CanonParams.reserve(Params->size()); 96cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) for (TemplateParameterList::const_iterator P = Params->begin(), 97cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) PEnd = Params->end(); 98cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) P != PEnd; ++P) { 99cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) 100cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) CanonParams.push_back( 101cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) TemplateTypeParmDecl::Create(*this, getTranslationUnitDecl(), 102cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) SourceLocation(), TTP->getDepth(), 103cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) TTP->getIndex(), 0, false, 104cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) TTP->isParameterPack())); 105cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) else if (NonTypeTemplateParmDecl *NTTP 106cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) = dyn_cast<NonTypeTemplateParmDecl>(*P)) 107cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) CanonParams.push_back( 108cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 109cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) SourceLocation(), NTTP->getDepth(), 110cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) NTTP->getPosition(), 0, 111cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) getCanonicalType(NTTP->getType()), 112cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 0)); 113cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) else 114cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) CanonParams.push_back(getCanonicalTemplateTemplateParmDecl( 115cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) cast<TemplateTemplateParmDecl>(*P))); 116cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) } 117cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 118cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) TemplateTemplateParmDecl *CanonTTP 119cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) = TemplateTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 120cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) SourceLocation(), TTP->getDepth(), 121cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) TTP->getPosition(), 0, 122 TemplateParameterList::Create(*this, SourceLocation(), 123 SourceLocation(), 124 CanonParams.data(), 125 CanonParams.size(), 126 SourceLocation())); 127 128 // Get the new insert position for the node we care about. 129 Canonical = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 130 assert(Canonical == 0 && "Shouldn't be in the map!"); 131 (void)Canonical; 132 133 // Create the canonical template template parameter entry. 134 Canonical = new (*this) CanonicalTemplateTemplateParm(CanonTTP); 135 CanonTemplateTemplateParms.InsertNode(Canonical, InsertPos); 136 return CanonTTP; 137} 138 139CXXABI *ASTContext::createCXXABI(const TargetInfo &T) { 140 if (!LangOpts.CPlusPlus) return 0; 141 142 switch (T.getCXXABI()) { 143 case CXXABI_ARM: 144 return CreateARMCXXABI(*this); 145 case CXXABI_Itanium: 146 return CreateItaniumCXXABI(*this); 147 case CXXABI_Microsoft: 148 return CreateMicrosoftCXXABI(*this); 149 } 150 return 0; 151} 152 153ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 154 const TargetInfo &t, 155 IdentifierTable &idents, SelectorTable &sels, 156 Builtin::Context &builtins, 157 unsigned size_reserve) : 158 TemplateSpecializationTypes(this_()), 159 DependentTemplateSpecializationTypes(this_()), 160 GlobalNestedNameSpecifier(0), IsInt128Installed(false), 161 CFConstantStringTypeDecl(0), NSConstantStringTypeDecl(0), 162 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 163 sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 164 NullTypeSourceInfo(QualType()), 165 SourceMgr(SM), LangOpts(LOpts), ABI(createCXXABI(t)), Target(t), 166 Idents(idents), Selectors(sels), 167 BuiltinInfo(builtins), 168 DeclarationNames(*this), 169 ExternalSource(0), Listener(0), PrintingPolicy(LOpts), 170 LastSDM(0, 0), 171 UniqueBlockByRefTypeID(0), UniqueBlockParmTypeID(0) { 172 ObjCIdRedefinitionType = QualType(); 173 ObjCClassRedefinitionType = QualType(); 174 ObjCSelRedefinitionType = QualType(); 175 if (size_reserve > 0) Types.reserve(size_reserve); 176 TUDecl = TranslationUnitDecl::Create(*this); 177 InitBuiltinTypes(); 178} 179 180ASTContext::~ASTContext() { 181 // Release the DenseMaps associated with DeclContext objects. 182 // FIXME: Is this the ideal solution? 183 ReleaseDeclContextMaps(); 184 185 // Call all of the deallocation functions. 186 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 187 Deallocations[I].first(Deallocations[I].second); 188 189 // Release all of the memory associated with overridden C++ methods. 190 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 191 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 192 OM != OMEnd; ++OM) 193 OM->second.Destroy(); 194 195 // ASTRecordLayout objects in ASTRecordLayouts must always be destroyed 196 // because they can contain DenseMaps. 197 for (llvm::DenseMap<const ObjCContainerDecl*, 198 const ASTRecordLayout*>::iterator 199 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) 200 // Increment in loop to prevent using deallocated memory. 201 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 202 R->Destroy(*this); 203 204 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 205 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 206 // Increment in loop to prevent using deallocated memory. 207 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 208 R->Destroy(*this); 209 } 210 211 for (llvm::DenseMap<const Decl*, AttrVec*>::iterator A = DeclAttrs.begin(), 212 AEnd = DeclAttrs.end(); 213 A != AEnd; ++A) 214 A->second->~AttrVec(); 215} 216 217void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 218 Deallocations.push_back(std::make_pair(Callback, Data)); 219} 220 221void 222ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 223 ExternalSource.reset(Source.take()); 224} 225 226void ASTContext::PrintStats() const { 227 fprintf(stderr, "*** AST Context Stats:\n"); 228 fprintf(stderr, " %d types total.\n", (int)Types.size()); 229 230 unsigned counts[] = { 231#define TYPE(Name, Parent) 0, 232#define ABSTRACT_TYPE(Name, Parent) 233#include "clang/AST/TypeNodes.def" 234 0 // Extra 235 }; 236 237 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 238 Type *T = Types[i]; 239 counts[(unsigned)T->getTypeClass()]++; 240 } 241 242 unsigned Idx = 0; 243 unsigned TotalBytes = 0; 244#define TYPE(Name, Parent) \ 245 if (counts[Idx]) \ 246 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 247 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 248 ++Idx; 249#define ABSTRACT_TYPE(Name, Parent) 250#include "clang/AST/TypeNodes.def" 251 252 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 253 254 // Implicit special member functions. 255 fprintf(stderr, " %u/%u implicit default constructors created\n", 256 NumImplicitDefaultConstructorsDeclared, 257 NumImplicitDefaultConstructors); 258 fprintf(stderr, " %u/%u implicit copy constructors created\n", 259 NumImplicitCopyConstructorsDeclared, 260 NumImplicitCopyConstructors); 261 fprintf(stderr, " %u/%u implicit copy assignment operators created\n", 262 NumImplicitCopyAssignmentOperatorsDeclared, 263 NumImplicitCopyAssignmentOperators); 264 fprintf(stderr, " %u/%u implicit destructors created\n", 265 NumImplicitDestructorsDeclared, NumImplicitDestructors); 266 267 if (ExternalSource.get()) { 268 fprintf(stderr, "\n"); 269 ExternalSource->PrintStats(); 270 } 271 272 BumpAlloc.PrintStats(); 273} 274 275 276void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 277 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 278 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 279 Types.push_back(Ty); 280} 281 282void ASTContext::InitBuiltinTypes() { 283 assert(VoidTy.isNull() && "Context reinitialized?"); 284 285 // C99 6.2.5p19. 286 InitBuiltinType(VoidTy, BuiltinType::Void); 287 288 // C99 6.2.5p2. 289 InitBuiltinType(BoolTy, BuiltinType::Bool); 290 // C99 6.2.5p3. 291 if (LangOpts.CharIsSigned) 292 InitBuiltinType(CharTy, BuiltinType::Char_S); 293 else 294 InitBuiltinType(CharTy, BuiltinType::Char_U); 295 // C99 6.2.5p4. 296 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 297 InitBuiltinType(ShortTy, BuiltinType::Short); 298 InitBuiltinType(IntTy, BuiltinType::Int); 299 InitBuiltinType(LongTy, BuiltinType::Long); 300 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 301 302 // C99 6.2.5p6. 303 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 304 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 305 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 306 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 307 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 308 309 // C99 6.2.5p10. 310 InitBuiltinType(FloatTy, BuiltinType::Float); 311 InitBuiltinType(DoubleTy, BuiltinType::Double); 312 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 313 314 // GNU extension, 128-bit integers. 315 InitBuiltinType(Int128Ty, BuiltinType::Int128); 316 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 317 318 if (LangOpts.CPlusPlus) // C++ 3.9.1p5 319 InitBuiltinType(WCharTy, BuiltinType::WChar); 320 else // C99 321 WCharTy = getFromTargetType(Target.getWCharType()); 322 323 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 324 InitBuiltinType(Char16Ty, BuiltinType::Char16); 325 else // C99 326 Char16Ty = getFromTargetType(Target.getChar16Type()); 327 328 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 329 InitBuiltinType(Char32Ty, BuiltinType::Char32); 330 else // C99 331 Char32Ty = getFromTargetType(Target.getChar32Type()); 332 333 // Placeholder type for type-dependent expressions whose type is 334 // completely unknown. No code should ever check a type against 335 // DependentTy and users should never see it; however, it is here to 336 // help diagnose failures to properly check for type-dependent 337 // expressions. 338 InitBuiltinType(DependentTy, BuiltinType::Dependent); 339 340 // Placeholder type for functions. 341 InitBuiltinType(OverloadTy, BuiltinType::Overload); 342 343 // Placeholder type for C++0x auto declarations whose real type has 344 // not yet been deduced. 345 InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 346 347 // C99 6.2.5p11. 348 FloatComplexTy = getComplexType(FloatTy); 349 DoubleComplexTy = getComplexType(DoubleTy); 350 LongDoubleComplexTy = getComplexType(LongDoubleTy); 351 352 BuiltinVaListType = QualType(); 353 354 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 355 ObjCIdTypedefType = QualType(); 356 ObjCClassTypedefType = QualType(); 357 ObjCSelTypedefType = QualType(); 358 359 // Builtin types for 'id', 'Class', and 'SEL'. 360 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 361 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 362 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 363 364 ObjCConstantStringType = QualType(); 365 366 // void * type 367 VoidPtrTy = getPointerType(VoidTy); 368 369 // nullptr type (C++0x 2.14.7) 370 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 371} 372 373Diagnostic &ASTContext::getDiagnostics() const { 374 return SourceMgr.getDiagnostics(); 375} 376 377AttrVec& ASTContext::getDeclAttrs(const Decl *D) { 378 AttrVec *&Result = DeclAttrs[D]; 379 if (!Result) { 380 void *Mem = Allocate(sizeof(AttrVec)); 381 Result = new (Mem) AttrVec; 382 } 383 384 return *Result; 385} 386 387/// \brief Erase the attributes corresponding to the given declaration. 388void ASTContext::eraseDeclAttrs(const Decl *D) { 389 llvm::DenseMap<const Decl*, AttrVec*>::iterator Pos = DeclAttrs.find(D); 390 if (Pos != DeclAttrs.end()) { 391 Pos->second->~AttrVec(); 392 DeclAttrs.erase(Pos); 393 } 394} 395 396 397MemberSpecializationInfo * 398ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 399 assert(Var->isStaticDataMember() && "Not a static data member"); 400 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 401 = InstantiatedFromStaticDataMember.find(Var); 402 if (Pos == InstantiatedFromStaticDataMember.end()) 403 return 0; 404 405 return Pos->second; 406} 407 408void 409ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 410 TemplateSpecializationKind TSK, 411 SourceLocation PointOfInstantiation) { 412 assert(Inst->isStaticDataMember() && "Not a static data member"); 413 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 414 assert(!InstantiatedFromStaticDataMember[Inst] && 415 "Already noted what static data member was instantiated from"); 416 InstantiatedFromStaticDataMember[Inst] 417 = new (*this) MemberSpecializationInfo(Tmpl, TSK, PointOfInstantiation); 418} 419 420NamedDecl * 421ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 422 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 423 = InstantiatedFromUsingDecl.find(UUD); 424 if (Pos == InstantiatedFromUsingDecl.end()) 425 return 0; 426 427 return Pos->second; 428} 429 430void 431ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 432 assert((isa<UsingDecl>(Pattern) || 433 isa<UnresolvedUsingValueDecl>(Pattern) || 434 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 435 "pattern decl is not a using decl"); 436 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 437 InstantiatedFromUsingDecl[Inst] = Pattern; 438} 439 440UsingShadowDecl * 441ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 442 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 443 = InstantiatedFromUsingShadowDecl.find(Inst); 444 if (Pos == InstantiatedFromUsingShadowDecl.end()) 445 return 0; 446 447 return Pos->second; 448} 449 450void 451ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 452 UsingShadowDecl *Pattern) { 453 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 454 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 455} 456 457FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 458 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 459 = InstantiatedFromUnnamedFieldDecl.find(Field); 460 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 461 return 0; 462 463 return Pos->second; 464} 465 466void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 467 FieldDecl *Tmpl) { 468 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 469 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 470 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 471 "Already noted what unnamed field was instantiated from"); 472 473 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 474} 475 476ASTContext::overridden_cxx_method_iterator 477ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 478 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 479 = OverriddenMethods.find(Method); 480 if (Pos == OverriddenMethods.end()) 481 return 0; 482 483 return Pos->second.begin(); 484} 485 486ASTContext::overridden_cxx_method_iterator 487ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 488 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 489 = OverriddenMethods.find(Method); 490 if (Pos == OverriddenMethods.end()) 491 return 0; 492 493 return Pos->second.end(); 494} 495 496unsigned 497ASTContext::overridden_methods_size(const CXXMethodDecl *Method) const { 498 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 499 = OverriddenMethods.find(Method); 500 if (Pos == OverriddenMethods.end()) 501 return 0; 502 503 return Pos->second.size(); 504} 505 506void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 507 const CXXMethodDecl *Overridden) { 508 OverriddenMethods[Method].push_back(Overridden); 509} 510 511//===----------------------------------------------------------------------===// 512// Type Sizing and Analysis 513//===----------------------------------------------------------------------===// 514 515/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 516/// scalar floating point type. 517const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 518 const BuiltinType *BT = T->getAs<BuiltinType>(); 519 assert(BT && "Not a floating point type!"); 520 switch (BT->getKind()) { 521 default: assert(0 && "Not a floating point type!"); 522 case BuiltinType::Float: return Target.getFloatFormat(); 523 case BuiltinType::Double: return Target.getDoubleFormat(); 524 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 525 } 526} 527 528/// getDeclAlign - Return a conservative estimate of the alignment of the 529/// specified decl. Note that bitfields do not have a valid alignment, so 530/// this method will assert on them. 531/// If @p RefAsPointee, references are treated like their underlying type 532/// (for alignof), else they're treated like pointers (for CodeGen). 533CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) { 534 unsigned Align = Target.getCharWidth(); 535 536 bool UseAlignAttrOnly = false; 537 if (unsigned AlignFromAttr = D->getMaxAlignment()) { 538 Align = AlignFromAttr; 539 540 // __attribute__((aligned)) can increase or decrease alignment 541 // *except* on a struct or struct member, where it only increases 542 // alignment unless 'packed' is also specified. 543 // 544 // It is an error for [[align]] to decrease alignment, so we can 545 // ignore that possibility; Sema should diagnose it. 546 if (isa<FieldDecl>(D)) { 547 UseAlignAttrOnly = D->hasAttr<PackedAttr>() || 548 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 549 } else { 550 UseAlignAttrOnly = true; 551 } 552 } 553 554 if (UseAlignAttrOnly) { 555 // ignore type of value 556 } else if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 557 QualType T = VD->getType(); 558 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 559 if (RefAsPointee) 560 T = RT->getPointeeType(); 561 else 562 T = getPointerType(RT->getPointeeType()); 563 } 564 if (!T->isIncompleteType() && !T->isFunctionType()) { 565 unsigned MinWidth = Target.getLargeArrayMinWidth(); 566 unsigned ArrayAlign = Target.getLargeArrayAlign(); 567 if (isa<VariableArrayType>(T) && MinWidth != 0) 568 Align = std::max(Align, ArrayAlign); 569 if (ConstantArrayType *CT = dyn_cast<ConstantArrayType>(T)) { 570 unsigned Size = getTypeSize(CT); 571 if (MinWidth != 0 && MinWidth <= Size) 572 Align = std::max(Align, ArrayAlign); 573 } 574 // Incomplete or function types default to 1. 575 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 576 T = cast<ArrayType>(T)->getElementType(); 577 578 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 579 } 580 if (const FieldDecl *FD = dyn_cast<FieldDecl>(VD)) { 581 // In the case of a field in a packed struct, we want the minimum 582 // of the alignment of the field and the alignment of the struct. 583 Align = std::min(Align, 584 getPreferredTypeAlign(FD->getParent()->getTypeForDecl())); 585 } 586 } 587 588 return CharUnits::fromQuantity(Align / Target.getCharWidth()); 589} 590 591std::pair<CharUnits, CharUnits> 592ASTContext::getTypeInfoInChars(const Type *T) { 593 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 594 return std::make_pair(CharUnits::fromQuantity(Info.first / getCharWidth()), 595 CharUnits::fromQuantity(Info.second / getCharWidth())); 596} 597 598std::pair<CharUnits, CharUnits> 599ASTContext::getTypeInfoInChars(QualType T) { 600 return getTypeInfoInChars(T.getTypePtr()); 601} 602 603/// getTypeSize - Return the size of the specified type, in bits. This method 604/// does not work on incomplete types. 605/// 606/// FIXME: Pointers into different addr spaces could have different sizes and 607/// alignment requirements: getPointerInfo should take an AddrSpace, this 608/// should take a QualType, &c. 609std::pair<uint64_t, unsigned> 610ASTContext::getTypeInfo(const Type *T) { 611 uint64_t Width=0; 612 unsigned Align=8; 613 switch (T->getTypeClass()) { 614#define TYPE(Class, Base) 615#define ABSTRACT_TYPE(Class, Base) 616#define NON_CANONICAL_TYPE(Class, Base) 617#define DEPENDENT_TYPE(Class, Base) case Type::Class: 618#include "clang/AST/TypeNodes.def" 619 assert(false && "Should not see dependent types"); 620 break; 621 622 case Type::FunctionNoProto: 623 case Type::FunctionProto: 624 // GCC extension: alignof(function) = 32 bits 625 Width = 0; 626 Align = 32; 627 break; 628 629 case Type::IncompleteArray: 630 case Type::VariableArray: 631 Width = 0; 632 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 633 break; 634 635 case Type::ConstantArray: { 636 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 637 638 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 639 Width = EltInfo.first*CAT->getSize().getZExtValue(); 640 Align = EltInfo.second; 641 break; 642 } 643 case Type::ExtVector: 644 case Type::Vector: { 645 const VectorType *VT = cast<VectorType>(T); 646 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 647 Width = EltInfo.first*VT->getNumElements(); 648 Align = Width; 649 // If the alignment is not a power of 2, round up to the next power of 2. 650 // This happens for non-power-of-2 length vectors. 651 if (Align & (Align-1)) { 652 Align = llvm::NextPowerOf2(Align); 653 Width = llvm::RoundUpToAlignment(Width, Align); 654 } 655 break; 656 } 657 658 case Type::Builtin: 659 switch (cast<BuiltinType>(T)->getKind()) { 660 default: assert(0 && "Unknown builtin type!"); 661 case BuiltinType::Void: 662 // GCC extension: alignof(void) = 8 bits. 663 Width = 0; 664 Align = 8; 665 break; 666 667 case BuiltinType::Bool: 668 Width = Target.getBoolWidth(); 669 Align = Target.getBoolAlign(); 670 break; 671 case BuiltinType::Char_S: 672 case BuiltinType::Char_U: 673 case BuiltinType::UChar: 674 case BuiltinType::SChar: 675 Width = Target.getCharWidth(); 676 Align = Target.getCharAlign(); 677 break; 678 case BuiltinType::WChar: 679 Width = Target.getWCharWidth(); 680 Align = Target.getWCharAlign(); 681 break; 682 case BuiltinType::Char16: 683 Width = Target.getChar16Width(); 684 Align = Target.getChar16Align(); 685 break; 686 case BuiltinType::Char32: 687 Width = Target.getChar32Width(); 688 Align = Target.getChar32Align(); 689 break; 690 case BuiltinType::UShort: 691 case BuiltinType::Short: 692 Width = Target.getShortWidth(); 693 Align = Target.getShortAlign(); 694 break; 695 case BuiltinType::UInt: 696 case BuiltinType::Int: 697 Width = Target.getIntWidth(); 698 Align = Target.getIntAlign(); 699 break; 700 case BuiltinType::ULong: 701 case BuiltinType::Long: 702 Width = Target.getLongWidth(); 703 Align = Target.getLongAlign(); 704 break; 705 case BuiltinType::ULongLong: 706 case BuiltinType::LongLong: 707 Width = Target.getLongLongWidth(); 708 Align = Target.getLongLongAlign(); 709 break; 710 case BuiltinType::Int128: 711 case BuiltinType::UInt128: 712 Width = 128; 713 Align = 128; // int128_t is 128-bit aligned on all targets. 714 break; 715 case BuiltinType::Float: 716 Width = Target.getFloatWidth(); 717 Align = Target.getFloatAlign(); 718 break; 719 case BuiltinType::Double: 720 Width = Target.getDoubleWidth(); 721 Align = Target.getDoubleAlign(); 722 break; 723 case BuiltinType::LongDouble: 724 Width = Target.getLongDoubleWidth(); 725 Align = Target.getLongDoubleAlign(); 726 break; 727 case BuiltinType::NullPtr: 728 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 729 Align = Target.getPointerAlign(0); // == sizeof(void*) 730 break; 731 case BuiltinType::ObjCId: 732 case BuiltinType::ObjCClass: 733 case BuiltinType::ObjCSel: 734 Width = Target.getPointerWidth(0); 735 Align = Target.getPointerAlign(0); 736 break; 737 } 738 break; 739 case Type::ObjCObjectPointer: 740 Width = Target.getPointerWidth(0); 741 Align = Target.getPointerAlign(0); 742 break; 743 case Type::BlockPointer: { 744 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 745 Width = Target.getPointerWidth(AS); 746 Align = Target.getPointerAlign(AS); 747 break; 748 } 749 case Type::LValueReference: 750 case Type::RValueReference: { 751 // alignof and sizeof should never enter this code path here, so we go 752 // the pointer route. 753 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 754 Width = Target.getPointerWidth(AS); 755 Align = Target.getPointerAlign(AS); 756 break; 757 } 758 case Type::Pointer: { 759 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 760 Width = Target.getPointerWidth(AS); 761 Align = Target.getPointerAlign(AS); 762 break; 763 } 764 case Type::MemberPointer: { 765 const MemberPointerType *MPT = cast<MemberPointerType>(T); 766 std::pair<uint64_t, unsigned> PtrDiffInfo = 767 getTypeInfo(getPointerDiffType()); 768 Width = PtrDiffInfo.first * ABI->getMemberPointerSize(MPT); 769 Align = PtrDiffInfo.second; 770 break; 771 } 772 case Type::Complex: { 773 // Complex types have the same alignment as their elements, but twice the 774 // size. 775 std::pair<uint64_t, unsigned> EltInfo = 776 getTypeInfo(cast<ComplexType>(T)->getElementType()); 777 Width = EltInfo.first*2; 778 Align = EltInfo.second; 779 break; 780 } 781 case Type::ObjCObject: 782 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 783 case Type::ObjCInterface: { 784 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 785 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 786 Width = Layout.getSize(); 787 Align = Layout.getAlignment(); 788 break; 789 } 790 case Type::Record: 791 case Type::Enum: { 792 const TagType *TT = cast<TagType>(T); 793 794 if (TT->getDecl()->isInvalidDecl()) { 795 Width = 1; 796 Align = 1; 797 break; 798 } 799 800 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 801 return getTypeInfo(ET->getDecl()->getIntegerType()); 802 803 const RecordType *RT = cast<RecordType>(TT); 804 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 805 Width = Layout.getSize(); 806 Align = Layout.getAlignment(); 807 break; 808 } 809 810 case Type::SubstTemplateTypeParm: 811 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 812 getReplacementType().getTypePtr()); 813 814 case Type::Paren: 815 return getTypeInfo(cast<ParenType>(T)->getInnerType().getTypePtr()); 816 817 case Type::Typedef: { 818 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 819 std::pair<uint64_t, unsigned> Info 820 = getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 821 Align = std::max(Typedef->getMaxAlignment(), Info.second); 822 Width = Info.first; 823 break; 824 } 825 826 case Type::TypeOfExpr: 827 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 828 .getTypePtr()); 829 830 case Type::TypeOf: 831 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 832 833 case Type::Decltype: 834 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 835 .getTypePtr()); 836 837 case Type::Elaborated: 838 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 839 840 case Type::TemplateSpecialization: 841 assert(getCanonicalType(T) != T && 842 "Cannot request the size of a dependent type"); 843 // FIXME: this is likely to be wrong once we support template 844 // aliases, since a template alias could refer to a typedef that 845 // has an __aligned__ attribute on it. 846 return getTypeInfo(getCanonicalType(T)); 847 } 848 849 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 850 return std::make_pair(Width, Align); 851} 852 853/// getTypeSizeInChars - Return the size of the specified type, in characters. 854/// This method does not work on incomplete types. 855CharUnits ASTContext::getTypeSizeInChars(QualType T) { 856 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 857} 858CharUnits ASTContext::getTypeSizeInChars(const Type *T) { 859 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 860} 861 862/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 863/// characters. This method does not work on incomplete types. 864CharUnits ASTContext::getTypeAlignInChars(QualType T) { 865 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 866} 867CharUnits ASTContext::getTypeAlignInChars(const Type *T) { 868 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 869} 870 871/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 872/// type for the current target in bits. This can be different than the ABI 873/// alignment in cases where it is beneficial for performance to overalign 874/// a data type. 875unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 876 unsigned ABIAlign = getTypeAlign(T); 877 878 // Double and long long should be naturally aligned if possible. 879 if (const ComplexType* CT = T->getAs<ComplexType>()) 880 T = CT->getElementType().getTypePtr(); 881 if (T->isSpecificBuiltinType(BuiltinType::Double) || 882 T->isSpecificBuiltinType(BuiltinType::LongLong)) 883 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 884 885 return ABIAlign; 886} 887 888/// ShallowCollectObjCIvars - 889/// Collect all ivars, including those synthesized, in the current class. 890/// 891void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 892 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 893 // FIXME. This need be removed but there are two many places which 894 // assume const-ness of ObjCInterfaceDecl 895 ObjCInterfaceDecl *IDecl = const_cast<ObjCInterfaceDecl *>(OI); 896 for (ObjCIvarDecl *Iv = IDecl->all_declared_ivar_begin(); Iv; 897 Iv= Iv->getNextIvar()) 898 Ivars.push_back(Iv); 899} 900 901/// DeepCollectObjCIvars - 902/// This routine first collects all declared, but not synthesized, ivars in 903/// super class and then collects all ivars, including those synthesized for 904/// current class. This routine is used for implementation of current class 905/// when all ivars, declared and synthesized are known. 906/// 907void ASTContext::DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, 908 bool leafClass, 909 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 910 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 911 DeepCollectObjCIvars(SuperClass, false, Ivars); 912 if (!leafClass) { 913 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 914 E = OI->ivar_end(); I != E; ++I) 915 Ivars.push_back(*I); 916 } 917 else 918 ShallowCollectObjCIvars(OI, Ivars); 919} 920 921/// CollectInheritedProtocols - Collect all protocols in current class and 922/// those inherited by it. 923void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 924 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 925 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 926 // We can use protocol_iterator here instead of 927 // all_referenced_protocol_iterator since we are walking all categories. 928 for (ObjCInterfaceDecl::all_protocol_iterator P = OI->all_referenced_protocol_begin(), 929 PE = OI->all_referenced_protocol_end(); P != PE; ++P) { 930 ObjCProtocolDecl *Proto = (*P); 931 Protocols.insert(Proto); 932 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 933 PE = Proto->protocol_end(); P != PE; ++P) { 934 Protocols.insert(*P); 935 CollectInheritedProtocols(*P, Protocols); 936 } 937 } 938 939 // Categories of this Interface. 940 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 941 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 942 CollectInheritedProtocols(CDeclChain, Protocols); 943 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 944 while (SD) { 945 CollectInheritedProtocols(SD, Protocols); 946 SD = SD->getSuperClass(); 947 } 948 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 949 for (ObjCCategoryDecl::protocol_iterator P = OC->protocol_begin(), 950 PE = OC->protocol_end(); P != PE; ++P) { 951 ObjCProtocolDecl *Proto = (*P); 952 Protocols.insert(Proto); 953 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 954 PE = Proto->protocol_end(); P != PE; ++P) 955 CollectInheritedProtocols(*P, Protocols); 956 } 957 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 958 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 959 PE = OP->protocol_end(); P != PE; ++P) { 960 ObjCProtocolDecl *Proto = (*P); 961 Protocols.insert(Proto); 962 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 963 PE = Proto->protocol_end(); P != PE; ++P) 964 CollectInheritedProtocols(*P, Protocols); 965 } 966 } 967} 968 969unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) { 970 unsigned count = 0; 971 // Count ivars declared in class extension. 972 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl; 973 CDecl = CDecl->getNextClassExtension()) 974 count += CDecl->ivar_size(); 975 976 // Count ivar defined in this class's implementation. This 977 // includes synthesized ivars. 978 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 979 count += ImplDecl->ivar_size(); 980 981 return count; 982} 983 984/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 985ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 986 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 987 I = ObjCImpls.find(D); 988 if (I != ObjCImpls.end()) 989 return cast<ObjCImplementationDecl>(I->second); 990 return 0; 991} 992/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 993ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 994 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 995 I = ObjCImpls.find(D); 996 if (I != ObjCImpls.end()) 997 return cast<ObjCCategoryImplDecl>(I->second); 998 return 0; 999} 1000 1001/// \brief Set the implementation of ObjCInterfaceDecl. 1002void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1003 ObjCImplementationDecl *ImplD) { 1004 assert(IFaceD && ImplD && "Passed null params"); 1005 ObjCImpls[IFaceD] = ImplD; 1006} 1007/// \brief Set the implementation of ObjCCategoryDecl. 1008void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 1009 ObjCCategoryImplDecl *ImplD) { 1010 assert(CatD && ImplD && "Passed null params"); 1011 ObjCImpls[CatD] = ImplD; 1012} 1013 1014/// \brief Get the copy initialization expression of VarDecl,or NULL if 1015/// none exists. 1016Expr *ASTContext::getBlockVarCopyInits(const VarDecl*VD) { 1017 assert(VD && "Passed null params"); 1018 assert(VD->hasAttr<BlocksAttr>() && 1019 "getBlockVarCopyInits - not __block var"); 1020 llvm::DenseMap<const VarDecl*, Expr*>::iterator 1021 I = BlockVarCopyInits.find(VD); 1022 return (I != BlockVarCopyInits.end()) ? cast<Expr>(I->second) : 0; 1023} 1024 1025/// \brief Set the copy inialization expression of a block var decl. 1026void ASTContext::setBlockVarCopyInits(VarDecl*VD, Expr* Init) { 1027 assert(VD && Init && "Passed null params"); 1028 assert(VD->hasAttr<BlocksAttr>() && 1029 "setBlockVarCopyInits - not __block var"); 1030 BlockVarCopyInits[VD] = Init; 1031} 1032 1033/// \brief Allocate an uninitialized TypeSourceInfo. 1034/// 1035/// The caller should initialize the memory held by TypeSourceInfo using 1036/// the TypeLoc wrappers. 1037/// 1038/// \param T the type that will be the basis for type source info. This type 1039/// should refer to how the declarator was written in source code, not to 1040/// what type semantic analysis resolved the declarator to. 1041TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 1042 unsigned DataSize) { 1043 if (!DataSize) 1044 DataSize = TypeLoc::getFullDataSizeForType(T); 1045 else 1046 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 1047 "incorrect data size provided to CreateTypeSourceInfo!"); 1048 1049 TypeSourceInfo *TInfo = 1050 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 1051 new (TInfo) TypeSourceInfo(T); 1052 return TInfo; 1053} 1054 1055TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1056 SourceLocation L) { 1057 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1058 DI->getTypeLoc().initialize(L); 1059 return DI; 1060} 1061 1062const ASTRecordLayout & 1063ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 1064 return getObjCLayout(D, 0); 1065} 1066 1067const ASTRecordLayout & 1068ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 1069 return getObjCLayout(D->getClassInterface(), D); 1070} 1071 1072//===----------------------------------------------------------------------===// 1073// Type creation/memoization methods 1074//===----------------------------------------------------------------------===// 1075 1076QualType ASTContext::getExtQualType(const Type *TypeNode, Qualifiers Quals) { 1077 unsigned Fast = Quals.getFastQualifiers(); 1078 Quals.removeFastQualifiers(); 1079 1080 // Check if we've already instantiated this type. 1081 llvm::FoldingSetNodeID ID; 1082 ExtQuals::Profile(ID, TypeNode, Quals); 1083 void *InsertPos = 0; 1084 if (ExtQuals *EQ = ExtQualNodes.FindNodeOrInsertPos(ID, InsertPos)) { 1085 assert(EQ->getQualifiers() == Quals); 1086 QualType T = QualType(EQ, Fast); 1087 return T; 1088 } 1089 1090 ExtQuals *New = new (*this, TypeAlignment) ExtQuals(TypeNode, Quals); 1091 ExtQualNodes.InsertNode(New, InsertPos); 1092 QualType T = QualType(New, Fast); 1093 return T; 1094} 1095 1096QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 1097 QualType CanT = getCanonicalType(T); 1098 if (CanT.getAddressSpace() == AddressSpace) 1099 return T; 1100 1101 // If we are composing extended qualifiers together, merge together 1102 // into one ExtQuals node. 1103 QualifierCollector Quals; 1104 const Type *TypeNode = Quals.strip(T); 1105 1106 // If this type already has an address space specified, it cannot get 1107 // another one. 1108 assert(!Quals.hasAddressSpace() && 1109 "Type cannot be in multiple addr spaces!"); 1110 Quals.addAddressSpace(AddressSpace); 1111 1112 return getExtQualType(TypeNode, Quals); 1113} 1114 1115QualType ASTContext::getObjCGCQualType(QualType T, 1116 Qualifiers::GC GCAttr) { 1117 QualType CanT = getCanonicalType(T); 1118 if (CanT.getObjCGCAttr() == GCAttr) 1119 return T; 1120 1121 if (T->isPointerType()) { 1122 QualType Pointee = T->getAs<PointerType>()->getPointeeType(); 1123 if (Pointee->isAnyPointerType()) { 1124 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1125 return getPointerType(ResultType); 1126 } 1127 } 1128 1129 // If we are composing extended qualifiers together, merge together 1130 // into one ExtQuals node. 1131 QualifierCollector Quals; 1132 const Type *TypeNode = Quals.strip(T); 1133 1134 // If this type already has an ObjCGC specified, it cannot get 1135 // another one. 1136 assert(!Quals.hasObjCGCAttr() && 1137 "Type cannot have multiple ObjCGCs!"); 1138 Quals.addObjCGCAttr(GCAttr); 1139 1140 return getExtQualType(TypeNode, Quals); 1141} 1142 1143static QualType getExtFunctionType(ASTContext& Context, QualType T, 1144 const FunctionType::ExtInfo &Info) { 1145 QualType ResultType; 1146 if (const PointerType *Pointer = T->getAs<PointerType>()) { 1147 QualType Pointee = Pointer->getPointeeType(); 1148 ResultType = getExtFunctionType(Context, Pointee, Info); 1149 if (ResultType == Pointee) 1150 return T; 1151 1152 ResultType = Context.getPointerType(ResultType); 1153 } else if (const ParenType *Paren = T->getAs<ParenType>()) { 1154 QualType Inner = Paren->getInnerType(); 1155 ResultType = getExtFunctionType(Context, Inner, Info); 1156 if (ResultType == Inner) 1157 return T; 1158 1159 ResultType = Context.getParenType(ResultType); 1160 } else if (const BlockPointerType *BlockPointer 1161 = T->getAs<BlockPointerType>()) { 1162 QualType Pointee = BlockPointer->getPointeeType(); 1163 ResultType = getExtFunctionType(Context, Pointee, Info); 1164 if (ResultType == Pointee) 1165 return T; 1166 1167 ResultType = Context.getBlockPointerType(ResultType); 1168 } else if (const MemberPointerType *MemberPointer 1169 = T->getAs<MemberPointerType>()) { 1170 QualType Pointee = MemberPointer->getPointeeType(); 1171 ResultType = getExtFunctionType(Context, Pointee, Info); 1172 if (ResultType == Pointee) 1173 return T; 1174 1175 ResultType = Context.getMemberPointerType(ResultType, 1176 MemberPointer->getClass()); 1177 } else if (const FunctionType *F = T->getAs<FunctionType>()) { 1178 if (F->getExtInfo() == Info) 1179 return T; 1180 1181 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(F)) { 1182 ResultType = Context.getFunctionNoProtoType(FNPT->getResultType(), 1183 Info); 1184 } else { 1185 const FunctionProtoType *FPT = cast<FunctionProtoType>(F); 1186 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 1187 EPI.ExtInfo = Info; 1188 ResultType = Context.getFunctionType(FPT->getResultType(), 1189 FPT->arg_type_begin(), 1190 FPT->getNumArgs(), EPI); 1191 } 1192 } else 1193 return T; 1194 1195 return Context.getQualifiedType(ResultType, T.getLocalQualifiers()); 1196} 1197 1198QualType ASTContext::getNoReturnType(QualType T, bool AddNoReturn) { 1199 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1200 return getExtFunctionType(*this, T, Info.withNoReturn(AddNoReturn)); 1201} 1202 1203QualType ASTContext::getCallConvType(QualType T, CallingConv CallConv) { 1204 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1205 return getExtFunctionType(*this, T, Info.withCallingConv(CallConv)); 1206} 1207 1208QualType ASTContext::getRegParmType(QualType T, unsigned RegParm) { 1209 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1210 return getExtFunctionType(*this, T, Info.withRegParm(RegParm)); 1211} 1212 1213/// getComplexType - Return the uniqued reference to the type for a complex 1214/// number with the specified element type. 1215QualType ASTContext::getComplexType(QualType T) { 1216 // Unique pointers, to guarantee there is only one pointer of a particular 1217 // structure. 1218 llvm::FoldingSetNodeID ID; 1219 ComplexType::Profile(ID, T); 1220 1221 void *InsertPos = 0; 1222 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1223 return QualType(CT, 0); 1224 1225 // If the pointee type isn't canonical, this won't be a canonical type either, 1226 // so fill in the canonical type field. 1227 QualType Canonical; 1228 if (!T.isCanonical()) { 1229 Canonical = getComplexType(getCanonicalType(T)); 1230 1231 // Get the new insert position for the node we care about. 1232 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1233 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1234 } 1235 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1236 Types.push_back(New); 1237 ComplexTypes.InsertNode(New, InsertPos); 1238 return QualType(New, 0); 1239} 1240 1241/// getPointerType - Return the uniqued reference to the type for a pointer to 1242/// the specified type. 1243QualType ASTContext::getPointerType(QualType T) { 1244 // Unique pointers, to guarantee there is only one pointer of a particular 1245 // structure. 1246 llvm::FoldingSetNodeID ID; 1247 PointerType::Profile(ID, T); 1248 1249 void *InsertPos = 0; 1250 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1251 return QualType(PT, 0); 1252 1253 // If the pointee type isn't canonical, this won't be a canonical type either, 1254 // so fill in the canonical type field. 1255 QualType Canonical; 1256 if (!T.isCanonical()) { 1257 Canonical = getPointerType(getCanonicalType(T)); 1258 1259 // Get the new insert position for the node we care about. 1260 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1261 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1262 } 1263 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1264 Types.push_back(New); 1265 PointerTypes.InsertNode(New, InsertPos); 1266 return QualType(New, 0); 1267} 1268 1269/// getBlockPointerType - Return the uniqued reference to the type for 1270/// a pointer to the specified block. 1271QualType ASTContext::getBlockPointerType(QualType T) { 1272 assert(T->isFunctionType() && "block of function types only"); 1273 // Unique pointers, to guarantee there is only one block of a particular 1274 // structure. 1275 llvm::FoldingSetNodeID ID; 1276 BlockPointerType::Profile(ID, T); 1277 1278 void *InsertPos = 0; 1279 if (BlockPointerType *PT = 1280 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1281 return QualType(PT, 0); 1282 1283 // If the block pointee type isn't canonical, this won't be a canonical 1284 // type either so fill in the canonical type field. 1285 QualType Canonical; 1286 if (!T.isCanonical()) { 1287 Canonical = getBlockPointerType(getCanonicalType(T)); 1288 1289 // Get the new insert position for the node we care about. 1290 BlockPointerType *NewIP = 1291 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1292 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1293 } 1294 BlockPointerType *New 1295 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1296 Types.push_back(New); 1297 BlockPointerTypes.InsertNode(New, InsertPos); 1298 return QualType(New, 0); 1299} 1300 1301/// getLValueReferenceType - Return the uniqued reference to the type for an 1302/// lvalue reference to the specified type. 1303QualType ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) { 1304 // Unique pointers, to guarantee there is only one pointer of a particular 1305 // structure. 1306 llvm::FoldingSetNodeID ID; 1307 ReferenceType::Profile(ID, T, SpelledAsLValue); 1308 1309 void *InsertPos = 0; 1310 if (LValueReferenceType *RT = 1311 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1312 return QualType(RT, 0); 1313 1314 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1315 1316 // If the referencee type isn't canonical, this won't be a canonical type 1317 // either, so fill in the canonical type field. 1318 QualType Canonical; 1319 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1320 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1321 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1322 1323 // Get the new insert position for the node we care about. 1324 LValueReferenceType *NewIP = 1325 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1326 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1327 } 1328 1329 LValueReferenceType *New 1330 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1331 SpelledAsLValue); 1332 Types.push_back(New); 1333 LValueReferenceTypes.InsertNode(New, InsertPos); 1334 1335 return QualType(New, 0); 1336} 1337 1338/// getRValueReferenceType - Return the uniqued reference to the type for an 1339/// rvalue reference to the specified type. 1340QualType ASTContext::getRValueReferenceType(QualType T) { 1341 // Unique pointers, to guarantee there is only one pointer of a particular 1342 // structure. 1343 llvm::FoldingSetNodeID ID; 1344 ReferenceType::Profile(ID, T, false); 1345 1346 void *InsertPos = 0; 1347 if (RValueReferenceType *RT = 1348 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1349 return QualType(RT, 0); 1350 1351 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1352 1353 // If the referencee type isn't canonical, this won't be a canonical type 1354 // either, so fill in the canonical type field. 1355 QualType Canonical; 1356 if (InnerRef || !T.isCanonical()) { 1357 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1358 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1359 1360 // Get the new insert position for the node we care about. 1361 RValueReferenceType *NewIP = 1362 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1363 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1364 } 1365 1366 RValueReferenceType *New 1367 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1368 Types.push_back(New); 1369 RValueReferenceTypes.InsertNode(New, InsertPos); 1370 return QualType(New, 0); 1371} 1372 1373/// getMemberPointerType - Return the uniqued reference to the type for a 1374/// member pointer to the specified type, in the specified class. 1375QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) { 1376 // Unique pointers, to guarantee there is only one pointer of a particular 1377 // structure. 1378 llvm::FoldingSetNodeID ID; 1379 MemberPointerType::Profile(ID, T, Cls); 1380 1381 void *InsertPos = 0; 1382 if (MemberPointerType *PT = 1383 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1384 return QualType(PT, 0); 1385 1386 // If the pointee or class type isn't canonical, this won't be a canonical 1387 // type either, so fill in the canonical type field. 1388 QualType Canonical; 1389 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1390 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1391 1392 // Get the new insert position for the node we care about. 1393 MemberPointerType *NewIP = 1394 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1395 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1396 } 1397 MemberPointerType *New 1398 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1399 Types.push_back(New); 1400 MemberPointerTypes.InsertNode(New, InsertPos); 1401 return QualType(New, 0); 1402} 1403 1404/// getConstantArrayType - Return the unique reference to the type for an 1405/// array of the specified element type. 1406QualType ASTContext::getConstantArrayType(QualType EltTy, 1407 const llvm::APInt &ArySizeIn, 1408 ArrayType::ArraySizeModifier ASM, 1409 unsigned EltTypeQuals) { 1410 assert((EltTy->isDependentType() || 1411 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1412 "Constant array of VLAs is illegal!"); 1413 1414 // Convert the array size into a canonical width matching the pointer size for 1415 // the target. 1416 llvm::APInt ArySize(ArySizeIn); 1417 ArySize = 1418 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1419 1420 llvm::FoldingSetNodeID ID; 1421 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1422 1423 void *InsertPos = 0; 1424 if (ConstantArrayType *ATP = 1425 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1426 return QualType(ATP, 0); 1427 1428 // If the element type isn't canonical, this won't be a canonical type either, 1429 // so fill in the canonical type field. 1430 QualType Canonical; 1431 if (!EltTy.isCanonical()) { 1432 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1433 ASM, EltTypeQuals); 1434 // Get the new insert position for the node we care about. 1435 ConstantArrayType *NewIP = 1436 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1437 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1438 } 1439 1440 ConstantArrayType *New = new(*this,TypeAlignment) 1441 ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1442 ConstantArrayTypes.InsertNode(New, InsertPos); 1443 Types.push_back(New); 1444 return QualType(New, 0); 1445} 1446 1447/// getIncompleteArrayType - Returns a unique reference to the type for a 1448/// incomplete array of the specified element type. 1449QualType ASTContext::getUnknownSizeVariableArrayType(QualType Ty) { 1450 QualType ElemTy = getBaseElementType(Ty); 1451 DeclarationName Name; 1452 llvm::SmallVector<QualType, 8> ATypes; 1453 QualType ATy = Ty; 1454 while (const ArrayType *AT = getAsArrayType(ATy)) { 1455 ATypes.push_back(ATy); 1456 ATy = AT->getElementType(); 1457 } 1458 for (int i = ATypes.size() - 1; i >= 0; i--) { 1459 if (const VariableArrayType *VAT = getAsVariableArrayType(ATypes[i])) { 1460 ElemTy = getVariableArrayType(ElemTy, /*ArraySize*/0, ArrayType::Star, 1461 0, VAT->getBracketsRange()); 1462 } 1463 else if (const ConstantArrayType *CAT = getAsConstantArrayType(ATypes[i])) { 1464 llvm::APSInt ConstVal(CAT->getSize()); 1465 ElemTy = getConstantArrayType(ElemTy, ConstVal, ArrayType::Normal, 0); 1466 } 1467 else if (getAsIncompleteArrayType(ATypes[i])) { 1468 ElemTy = getVariableArrayType(ElemTy, /*ArraySize*/0, ArrayType::Normal, 1469 0, SourceRange()); 1470 } 1471 else 1472 assert(false && "DependentArrayType is seen"); 1473 } 1474 return ElemTy; 1475} 1476 1477/// getVariableArrayDecayedType - Returns a vla type where known sizes 1478/// are replaced with [*] 1479QualType ASTContext::getVariableArrayDecayedType(QualType Ty) { 1480 if (Ty->isPointerType()) { 1481 QualType BaseType = Ty->getAs<PointerType>()->getPointeeType(); 1482 if (isa<VariableArrayType>(BaseType)) { 1483 ArrayType *AT = dyn_cast<ArrayType>(BaseType); 1484 VariableArrayType *VAT = cast<VariableArrayType>(AT); 1485 if (VAT->getSizeExpr()) { 1486 Ty = getUnknownSizeVariableArrayType(BaseType); 1487 Ty = getPointerType(Ty); 1488 } 1489 } 1490 } 1491 return Ty; 1492} 1493 1494 1495/// getVariableArrayType - Returns a non-unique reference to the type for a 1496/// variable array of the specified element type. 1497QualType ASTContext::getVariableArrayType(QualType EltTy, 1498 Expr *NumElts, 1499 ArrayType::ArraySizeModifier ASM, 1500 unsigned EltTypeQuals, 1501 SourceRange Brackets) { 1502 // Since we don't unique expressions, it isn't possible to unique VLA's 1503 // that have an expression provided for their size. 1504 QualType CanonType; 1505 1506 if (!EltTy.isCanonical()) { 1507 CanonType = getVariableArrayType(getCanonicalType(EltTy), NumElts, ASM, 1508 EltTypeQuals, Brackets); 1509 } 1510 1511 VariableArrayType *New = new(*this, TypeAlignment) 1512 VariableArrayType(EltTy, CanonType, NumElts, ASM, EltTypeQuals, Brackets); 1513 1514 VariableArrayTypes.push_back(New); 1515 Types.push_back(New); 1516 return QualType(New, 0); 1517} 1518 1519/// getDependentSizedArrayType - Returns a non-unique reference to 1520/// the type for a dependently-sized array of the specified element 1521/// type. 1522QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1523 Expr *NumElts, 1524 ArrayType::ArraySizeModifier ASM, 1525 unsigned EltTypeQuals, 1526 SourceRange Brackets) { 1527 assert((!NumElts || NumElts->isTypeDependent() || 1528 NumElts->isValueDependent()) && 1529 "Size must be type- or value-dependent!"); 1530 1531 void *InsertPos = 0; 1532 DependentSizedArrayType *Canon = 0; 1533 llvm::FoldingSetNodeID ID; 1534 1535 QualType CanonicalEltTy = getCanonicalType(EltTy); 1536 if (NumElts) { 1537 // Dependently-sized array types that do not have a specified 1538 // number of elements will have their sizes deduced from an 1539 // initializer. 1540 DependentSizedArrayType::Profile(ID, *this, CanonicalEltTy, ASM, 1541 EltTypeQuals, NumElts); 1542 1543 Canon = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1544 } 1545 1546 DependentSizedArrayType *New; 1547 if (Canon) { 1548 // We already have a canonical version of this array type; use it as 1549 // the canonical type for a newly-built type. 1550 New = new (*this, TypeAlignment) 1551 DependentSizedArrayType(*this, EltTy, QualType(Canon, 0), 1552 NumElts, ASM, EltTypeQuals, Brackets); 1553 } else if (CanonicalEltTy == EltTy) { 1554 // This is a canonical type. Record it. 1555 New = new (*this, TypeAlignment) 1556 DependentSizedArrayType(*this, EltTy, QualType(), 1557 NumElts, ASM, EltTypeQuals, Brackets); 1558 1559 if (NumElts) { 1560#ifndef NDEBUG 1561 DependentSizedArrayType *CanonCheck 1562 = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1563 assert(!CanonCheck && "Dependent-sized canonical array type broken"); 1564 (void)CanonCheck; 1565#endif 1566 DependentSizedArrayTypes.InsertNode(New, InsertPos); 1567 } 1568 } else { 1569 QualType Canon = getDependentSizedArrayType(CanonicalEltTy, NumElts, 1570 ASM, EltTypeQuals, 1571 SourceRange()); 1572 New = new (*this, TypeAlignment) 1573 DependentSizedArrayType(*this, EltTy, Canon, 1574 NumElts, ASM, EltTypeQuals, Brackets); 1575 } 1576 1577 Types.push_back(New); 1578 return QualType(New, 0); 1579} 1580 1581QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1582 ArrayType::ArraySizeModifier ASM, 1583 unsigned EltTypeQuals) { 1584 llvm::FoldingSetNodeID ID; 1585 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1586 1587 void *InsertPos = 0; 1588 if (IncompleteArrayType *ATP = 1589 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1590 return QualType(ATP, 0); 1591 1592 // If the element type isn't canonical, this won't be a canonical type 1593 // either, so fill in the canonical type field. 1594 QualType Canonical; 1595 1596 if (!EltTy.isCanonical()) { 1597 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1598 ASM, EltTypeQuals); 1599 1600 // Get the new insert position for the node we care about. 1601 IncompleteArrayType *NewIP = 1602 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1603 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1604 } 1605 1606 IncompleteArrayType *New = new (*this, TypeAlignment) 1607 IncompleteArrayType(EltTy, Canonical, ASM, EltTypeQuals); 1608 1609 IncompleteArrayTypes.InsertNode(New, InsertPos); 1610 Types.push_back(New); 1611 return QualType(New, 0); 1612} 1613 1614/// getVectorType - Return the unique reference to a vector type of 1615/// the specified element type and size. VectorType must be a built-in type. 1616QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1617 VectorType::VectorKind VecKind) { 1618 BuiltinType *BaseType; 1619 1620 BaseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1621 assert(BaseType != 0 && "getVectorType(): Expecting a built-in type"); 1622 1623 // Check if we've already instantiated a vector of this type. 1624 llvm::FoldingSetNodeID ID; 1625 VectorType::Profile(ID, vecType, NumElts, Type::Vector, VecKind); 1626 1627 void *InsertPos = 0; 1628 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1629 return QualType(VTP, 0); 1630 1631 // If the element type isn't canonical, this won't be a canonical type either, 1632 // so fill in the canonical type field. 1633 QualType Canonical; 1634 if (!vecType.isCanonical()) { 1635 Canonical = getVectorType(getCanonicalType(vecType), NumElts, VecKind); 1636 1637 // Get the new insert position for the node we care about. 1638 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1639 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1640 } 1641 VectorType *New = new (*this, TypeAlignment) 1642 VectorType(vecType, NumElts, Canonical, VecKind); 1643 VectorTypes.InsertNode(New, InsertPos); 1644 Types.push_back(New); 1645 return QualType(New, 0); 1646} 1647 1648/// getExtVectorType - Return the unique reference to an extended vector type of 1649/// the specified element type and size. VectorType must be a built-in type. 1650QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1651 BuiltinType *baseType; 1652 1653 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1654 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1655 1656 // Check if we've already instantiated a vector of this type. 1657 llvm::FoldingSetNodeID ID; 1658 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, 1659 VectorType::GenericVector); 1660 void *InsertPos = 0; 1661 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1662 return QualType(VTP, 0); 1663 1664 // If the element type isn't canonical, this won't be a canonical type either, 1665 // so fill in the canonical type field. 1666 QualType Canonical; 1667 if (!vecType.isCanonical()) { 1668 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1669 1670 // Get the new insert position for the node we care about. 1671 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1672 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1673 } 1674 ExtVectorType *New = new (*this, TypeAlignment) 1675 ExtVectorType(vecType, NumElts, Canonical); 1676 VectorTypes.InsertNode(New, InsertPos); 1677 Types.push_back(New); 1678 return QualType(New, 0); 1679} 1680 1681QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1682 Expr *SizeExpr, 1683 SourceLocation AttrLoc) { 1684 llvm::FoldingSetNodeID ID; 1685 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1686 SizeExpr); 1687 1688 void *InsertPos = 0; 1689 DependentSizedExtVectorType *Canon 1690 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1691 DependentSizedExtVectorType *New; 1692 if (Canon) { 1693 // We already have a canonical version of this array type; use it as 1694 // the canonical type for a newly-built type. 1695 New = new (*this, TypeAlignment) 1696 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1697 SizeExpr, AttrLoc); 1698 } else { 1699 QualType CanonVecTy = getCanonicalType(vecType); 1700 if (CanonVecTy == vecType) { 1701 New = new (*this, TypeAlignment) 1702 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1703 AttrLoc); 1704 1705 DependentSizedExtVectorType *CanonCheck 1706 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1707 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1708 (void)CanonCheck; 1709 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1710 } else { 1711 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1712 SourceLocation()); 1713 New = new (*this, TypeAlignment) 1714 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1715 } 1716 } 1717 1718 Types.push_back(New); 1719 return QualType(New, 0); 1720} 1721 1722/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1723/// 1724QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, 1725 const FunctionType::ExtInfo &Info) { 1726 const CallingConv CallConv = Info.getCC(); 1727 // Unique functions, to guarantee there is only one function of a particular 1728 // structure. 1729 llvm::FoldingSetNodeID ID; 1730 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1731 1732 void *InsertPos = 0; 1733 if (FunctionNoProtoType *FT = 1734 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1735 return QualType(FT, 0); 1736 1737 QualType Canonical; 1738 if (!ResultTy.isCanonical() || 1739 getCanonicalCallConv(CallConv) != CallConv) { 1740 Canonical = 1741 getFunctionNoProtoType(getCanonicalType(ResultTy), 1742 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1743 1744 // Get the new insert position for the node we care about. 1745 FunctionNoProtoType *NewIP = 1746 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1747 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1748 } 1749 1750 FunctionNoProtoType *New = new (*this, TypeAlignment) 1751 FunctionNoProtoType(ResultTy, Canonical, Info); 1752 Types.push_back(New); 1753 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1754 return QualType(New, 0); 1755} 1756 1757/// getFunctionType - Return a normal function type with a typed argument 1758/// list. isVariadic indicates whether the argument list includes '...'. 1759QualType ASTContext::getFunctionType(QualType ResultTy, 1760 const QualType *ArgArray, unsigned NumArgs, 1761 const FunctionProtoType::ExtProtoInfo &EPI) { 1762 // Unique functions, to guarantee there is only one function of a particular 1763 // structure. 1764 llvm::FoldingSetNodeID ID; 1765 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, EPI); 1766 1767 void *InsertPos = 0; 1768 if (FunctionProtoType *FTP = 1769 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1770 return QualType(FTP, 0); 1771 1772 // Determine whether the type being created is already canonical or not. 1773 bool isCanonical = !EPI.HasExceptionSpec && ResultTy.isCanonical(); 1774 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1775 if (!ArgArray[i].isCanonicalAsParam()) 1776 isCanonical = false; 1777 1778 const CallingConv CallConv = EPI.ExtInfo.getCC(); 1779 1780 // If this type isn't canonical, get the canonical version of it. 1781 // The exception spec is not part of the canonical type. 1782 QualType Canonical; 1783 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1784 llvm::SmallVector<QualType, 16> CanonicalArgs; 1785 CanonicalArgs.reserve(NumArgs); 1786 for (unsigned i = 0; i != NumArgs; ++i) 1787 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1788 1789 FunctionProtoType::ExtProtoInfo CanonicalEPI = EPI; 1790 if (CanonicalEPI.HasExceptionSpec) { 1791 CanonicalEPI.HasExceptionSpec = false; 1792 CanonicalEPI.HasAnyExceptionSpec = false; 1793 CanonicalEPI.NumExceptions = 0; 1794 } 1795 CanonicalEPI.ExtInfo 1796 = CanonicalEPI.ExtInfo.withCallingConv(getCanonicalCallConv(CallConv)); 1797 1798 Canonical = getFunctionType(getCanonicalType(ResultTy), 1799 CanonicalArgs.data(), NumArgs, 1800 CanonicalEPI); 1801 1802 // Get the new insert position for the node we care about. 1803 FunctionProtoType *NewIP = 1804 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1805 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1806 } 1807 1808 // FunctionProtoType objects are allocated with extra bytes after them 1809 // for two variable size arrays (for parameter and exception types) at the 1810 // end of them. 1811 size_t Size = sizeof(FunctionProtoType) + 1812 NumArgs * sizeof(QualType) + 1813 EPI.NumExceptions * sizeof(QualType); 1814 FunctionProtoType *FTP = (FunctionProtoType*) Allocate(Size, TypeAlignment); 1815 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, Canonical, EPI); 1816 Types.push_back(FTP); 1817 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1818 return QualType(FTP, 0); 1819} 1820 1821#ifndef NDEBUG 1822static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1823 if (!isa<CXXRecordDecl>(D)) return false; 1824 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1825 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1826 return true; 1827 if (RD->getDescribedClassTemplate() && 1828 !isa<ClassTemplateSpecializationDecl>(RD)) 1829 return true; 1830 return false; 1831} 1832#endif 1833 1834/// getInjectedClassNameType - Return the unique reference to the 1835/// injected class name type for the specified templated declaration. 1836QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1837 QualType TST) { 1838 assert(NeedsInjectedClassNameType(Decl)); 1839 if (Decl->TypeForDecl) { 1840 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1841 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDeclaration()) { 1842 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1843 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1844 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1845 } else { 1846 Decl->TypeForDecl = 1847 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 1848 Types.push_back(Decl->TypeForDecl); 1849 } 1850 return QualType(Decl->TypeForDecl, 0); 1851} 1852 1853/// getTypeDeclType - Return the unique reference to the type for the 1854/// specified type declaration. 1855QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) { 1856 assert(Decl && "Passed null for Decl param"); 1857 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 1858 1859 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1860 return getTypedefType(Typedef); 1861 1862 assert(!isa<TemplateTypeParmDecl>(Decl) && 1863 "Template type parameter types are always available."); 1864 1865 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1866 assert(!Record->getPreviousDeclaration() && 1867 "struct/union has previous declaration"); 1868 assert(!NeedsInjectedClassNameType(Record)); 1869 return getRecordType(Record); 1870 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1871 assert(!Enum->getPreviousDeclaration() && 1872 "enum has previous declaration"); 1873 return getEnumType(Enum); 1874 } else if (const UnresolvedUsingTypenameDecl *Using = 1875 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1876 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1877 } else 1878 llvm_unreachable("TypeDecl without a type?"); 1879 1880 Types.push_back(Decl->TypeForDecl); 1881 return QualType(Decl->TypeForDecl, 0); 1882} 1883 1884/// getTypedefType - Return the unique reference to the type for the 1885/// specified typename decl. 1886QualType 1887ASTContext::getTypedefType(const TypedefDecl *Decl, QualType Canonical) { 1888 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1889 1890 if (Canonical.isNull()) 1891 Canonical = getCanonicalType(Decl->getUnderlyingType()); 1892 Decl->TypeForDecl = new(*this, TypeAlignment) 1893 TypedefType(Type::Typedef, Decl, Canonical); 1894 Types.push_back(Decl->TypeForDecl); 1895 return QualType(Decl->TypeForDecl, 0); 1896} 1897 1898QualType ASTContext::getRecordType(const RecordDecl *Decl) { 1899 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1900 1901 if (const RecordDecl *PrevDecl = Decl->getPreviousDeclaration()) 1902 if (PrevDecl->TypeForDecl) 1903 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 1904 1905 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Decl); 1906 Types.push_back(Decl->TypeForDecl); 1907 return QualType(Decl->TypeForDecl, 0); 1908} 1909 1910QualType ASTContext::getEnumType(const EnumDecl *Decl) { 1911 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1912 1913 if (const EnumDecl *PrevDecl = Decl->getPreviousDeclaration()) 1914 if (PrevDecl->TypeForDecl) 1915 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 1916 1917 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Decl); 1918 Types.push_back(Decl->TypeForDecl); 1919 return QualType(Decl->TypeForDecl, 0); 1920} 1921 1922/// \brief Retrieve a substitution-result type. 1923QualType 1924ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1925 QualType Replacement) { 1926 assert(Replacement.isCanonical() 1927 && "replacement types must always be canonical"); 1928 1929 llvm::FoldingSetNodeID ID; 1930 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1931 void *InsertPos = 0; 1932 SubstTemplateTypeParmType *SubstParm 1933 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1934 1935 if (!SubstParm) { 1936 SubstParm = new (*this, TypeAlignment) 1937 SubstTemplateTypeParmType(Parm, Replacement); 1938 Types.push_back(SubstParm); 1939 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1940 } 1941 1942 return QualType(SubstParm, 0); 1943} 1944 1945/// \brief Retrieve the template type parameter type for a template 1946/// parameter or parameter pack with the given depth, index, and (optionally) 1947/// name. 1948QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1949 bool ParameterPack, 1950 IdentifierInfo *Name) { 1951 llvm::FoldingSetNodeID ID; 1952 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1953 void *InsertPos = 0; 1954 TemplateTypeParmType *TypeParm 1955 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1956 1957 if (TypeParm) 1958 return QualType(TypeParm, 0); 1959 1960 if (Name) { 1961 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1962 TypeParm = new (*this, TypeAlignment) 1963 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 1964 1965 TemplateTypeParmType *TypeCheck 1966 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1967 assert(!TypeCheck && "Template type parameter canonical type broken"); 1968 (void)TypeCheck; 1969 } else 1970 TypeParm = new (*this, TypeAlignment) 1971 TemplateTypeParmType(Depth, Index, ParameterPack); 1972 1973 Types.push_back(TypeParm); 1974 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1975 1976 return QualType(TypeParm, 0); 1977} 1978 1979TypeSourceInfo * 1980ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 1981 SourceLocation NameLoc, 1982 const TemplateArgumentListInfo &Args, 1983 QualType CanonType) { 1984 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 1985 1986 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 1987 TemplateSpecializationTypeLoc TL 1988 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 1989 TL.setTemplateNameLoc(NameLoc); 1990 TL.setLAngleLoc(Args.getLAngleLoc()); 1991 TL.setRAngleLoc(Args.getRAngleLoc()); 1992 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 1993 TL.setArgLocInfo(i, Args[i].getLocInfo()); 1994 return DI; 1995} 1996 1997QualType 1998ASTContext::getTemplateSpecializationType(TemplateName Template, 1999 const TemplateArgumentListInfo &Args, 2000 QualType Canon) { 2001 unsigned NumArgs = Args.size(); 2002 2003 llvm::SmallVector<TemplateArgument, 4> ArgVec; 2004 ArgVec.reserve(NumArgs); 2005 for (unsigned i = 0; i != NumArgs; ++i) 2006 ArgVec.push_back(Args[i].getArgument()); 2007 2008 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 2009 Canon); 2010} 2011 2012QualType 2013ASTContext::getTemplateSpecializationType(TemplateName Template, 2014 const TemplateArgument *Args, 2015 unsigned NumArgs, 2016 QualType Canon) { 2017 if (!Canon.isNull()) 2018 Canon = getCanonicalType(Canon); 2019 else 2020 Canon = getCanonicalTemplateSpecializationType(Template, Args, NumArgs); 2021 2022 // Allocate the (non-canonical) template specialization type, but don't 2023 // try to unique it: these types typically have location information that 2024 // we don't unique and don't want to lose. 2025 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2026 sizeof(TemplateArgument) * NumArgs), 2027 TypeAlignment); 2028 TemplateSpecializationType *Spec 2029 = new (Mem) TemplateSpecializationType(Template, 2030 Args, NumArgs, 2031 Canon); 2032 2033 Types.push_back(Spec); 2034 return QualType(Spec, 0); 2035} 2036 2037QualType 2038ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template, 2039 const TemplateArgument *Args, 2040 unsigned NumArgs) { 2041 // Build the canonical template specialization type. 2042 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 2043 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 2044 CanonArgs.reserve(NumArgs); 2045 for (unsigned I = 0; I != NumArgs; ++I) 2046 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 2047 2048 // Determine whether this canonical template specialization type already 2049 // exists. 2050 llvm::FoldingSetNodeID ID; 2051 TemplateSpecializationType::Profile(ID, CanonTemplate, 2052 CanonArgs.data(), NumArgs, *this); 2053 2054 void *InsertPos = 0; 2055 TemplateSpecializationType *Spec 2056 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2057 2058 if (!Spec) { 2059 // Allocate a new canonical template specialization type. 2060 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2061 sizeof(TemplateArgument) * NumArgs), 2062 TypeAlignment); 2063 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 2064 CanonArgs.data(), NumArgs, 2065 QualType()); 2066 Types.push_back(Spec); 2067 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 2068 } 2069 2070 assert(Spec->isDependentType() && 2071 "Non-dependent template-id type must have a canonical type"); 2072 return QualType(Spec, 0); 2073} 2074 2075QualType 2076ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 2077 NestedNameSpecifier *NNS, 2078 QualType NamedType) { 2079 llvm::FoldingSetNodeID ID; 2080 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 2081 2082 void *InsertPos = 0; 2083 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2084 if (T) 2085 return QualType(T, 0); 2086 2087 QualType Canon = NamedType; 2088 if (!Canon.isCanonical()) { 2089 Canon = getCanonicalType(NamedType); 2090 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2091 assert(!CheckT && "Elaborated canonical type broken"); 2092 (void)CheckT; 2093 } 2094 2095 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 2096 Types.push_back(T); 2097 ElaboratedTypes.InsertNode(T, InsertPos); 2098 return QualType(T, 0); 2099} 2100 2101QualType 2102ASTContext::getParenType(QualType InnerType) { 2103 llvm::FoldingSetNodeID ID; 2104 ParenType::Profile(ID, InnerType); 2105 2106 void *InsertPos = 0; 2107 ParenType *T = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2108 if (T) 2109 return QualType(T, 0); 2110 2111 QualType Canon = InnerType; 2112 if (!Canon.isCanonical()) { 2113 Canon = getCanonicalType(InnerType); 2114 ParenType *CheckT = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2115 assert(!CheckT && "Paren canonical type broken"); 2116 (void)CheckT; 2117 } 2118 2119 T = new (*this) ParenType(InnerType, Canon); 2120 Types.push_back(T); 2121 ParenTypes.InsertNode(T, InsertPos); 2122 return QualType(T, 0); 2123} 2124 2125QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 2126 NestedNameSpecifier *NNS, 2127 const IdentifierInfo *Name, 2128 QualType Canon) { 2129 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2130 2131 if (Canon.isNull()) { 2132 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2133 ElaboratedTypeKeyword CanonKeyword = Keyword; 2134 if (Keyword == ETK_None) 2135 CanonKeyword = ETK_Typename; 2136 2137 if (CanonNNS != NNS || CanonKeyword != Keyword) 2138 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 2139 } 2140 2141 llvm::FoldingSetNodeID ID; 2142 DependentNameType::Profile(ID, Keyword, NNS, Name); 2143 2144 void *InsertPos = 0; 2145 DependentNameType *T 2146 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2147 if (T) 2148 return QualType(T, 0); 2149 2150 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 2151 Types.push_back(T); 2152 DependentNameTypes.InsertNode(T, InsertPos); 2153 return QualType(T, 0); 2154} 2155 2156QualType 2157ASTContext::getDependentTemplateSpecializationType( 2158 ElaboratedTypeKeyword Keyword, 2159 NestedNameSpecifier *NNS, 2160 const IdentifierInfo *Name, 2161 const TemplateArgumentListInfo &Args) { 2162 // TODO: avoid this copy 2163 llvm::SmallVector<TemplateArgument, 16> ArgCopy; 2164 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2165 ArgCopy.push_back(Args[I].getArgument()); 2166 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2167 ArgCopy.size(), 2168 ArgCopy.data()); 2169} 2170 2171QualType 2172ASTContext::getDependentTemplateSpecializationType( 2173 ElaboratedTypeKeyword Keyword, 2174 NestedNameSpecifier *NNS, 2175 const IdentifierInfo *Name, 2176 unsigned NumArgs, 2177 const TemplateArgument *Args) { 2178 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2179 2180 llvm::FoldingSetNodeID ID; 2181 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2182 Name, NumArgs, Args); 2183 2184 void *InsertPos = 0; 2185 DependentTemplateSpecializationType *T 2186 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2187 if (T) 2188 return QualType(T, 0); 2189 2190 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2191 2192 ElaboratedTypeKeyword CanonKeyword = Keyword; 2193 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2194 2195 bool AnyNonCanonArgs = false; 2196 llvm::SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2197 for (unsigned I = 0; I != NumArgs; ++I) { 2198 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2199 if (!CanonArgs[I].structurallyEquals(Args[I])) 2200 AnyNonCanonArgs = true; 2201 } 2202 2203 QualType Canon; 2204 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2205 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2206 Name, NumArgs, 2207 CanonArgs.data()); 2208 2209 // Find the insert position again. 2210 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2211 } 2212 2213 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2214 sizeof(TemplateArgument) * NumArgs), 2215 TypeAlignment); 2216 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2217 Name, NumArgs, Args, Canon); 2218 Types.push_back(T); 2219 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2220 return QualType(T, 0); 2221} 2222 2223/// CmpProtocolNames - Comparison predicate for sorting protocols 2224/// alphabetically. 2225static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2226 const ObjCProtocolDecl *RHS) { 2227 return LHS->getDeclName() < RHS->getDeclName(); 2228} 2229 2230static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2231 unsigned NumProtocols) { 2232 if (NumProtocols == 0) return true; 2233 2234 for (unsigned i = 1; i != NumProtocols; ++i) 2235 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2236 return false; 2237 return true; 2238} 2239 2240static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2241 unsigned &NumProtocols) { 2242 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2243 2244 // Sort protocols, keyed by name. 2245 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2246 2247 // Remove duplicates. 2248 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2249 NumProtocols = ProtocolsEnd-Protocols; 2250} 2251 2252QualType ASTContext::getObjCObjectType(QualType BaseType, 2253 ObjCProtocolDecl * const *Protocols, 2254 unsigned NumProtocols) { 2255 // If the base type is an interface and there aren't any protocols 2256 // to add, then the interface type will do just fine. 2257 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2258 return BaseType; 2259 2260 // Look in the folding set for an existing type. 2261 llvm::FoldingSetNodeID ID; 2262 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2263 void *InsertPos = 0; 2264 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2265 return QualType(QT, 0); 2266 2267 // Build the canonical type, which has the canonical base type and 2268 // a sorted-and-uniqued list of protocols. 2269 QualType Canonical; 2270 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2271 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2272 if (!ProtocolsSorted) { 2273 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2274 Protocols + NumProtocols); 2275 unsigned UniqueCount = NumProtocols; 2276 2277 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2278 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2279 &Sorted[0], UniqueCount); 2280 } else { 2281 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2282 Protocols, NumProtocols); 2283 } 2284 2285 // Regenerate InsertPos. 2286 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2287 } 2288 2289 unsigned Size = sizeof(ObjCObjectTypeImpl); 2290 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2291 void *Mem = Allocate(Size, TypeAlignment); 2292 ObjCObjectTypeImpl *T = 2293 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2294 2295 Types.push_back(T); 2296 ObjCObjectTypes.InsertNode(T, InsertPos); 2297 return QualType(T, 0); 2298} 2299 2300/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2301/// the given object type. 2302QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) { 2303 llvm::FoldingSetNodeID ID; 2304 ObjCObjectPointerType::Profile(ID, ObjectT); 2305 2306 void *InsertPos = 0; 2307 if (ObjCObjectPointerType *QT = 2308 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2309 return QualType(QT, 0); 2310 2311 // Find the canonical object type. 2312 QualType Canonical; 2313 if (!ObjectT.isCanonical()) { 2314 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2315 2316 // Regenerate InsertPos. 2317 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2318 } 2319 2320 // No match. 2321 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2322 ObjCObjectPointerType *QType = 2323 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2324 2325 Types.push_back(QType); 2326 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2327 return QualType(QType, 0); 2328} 2329 2330/// getObjCInterfaceType - Return the unique reference to the type for the 2331/// specified ObjC interface decl. The list of protocols is optional. 2332QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) { 2333 if (Decl->TypeForDecl) 2334 return QualType(Decl->TypeForDecl, 0); 2335 2336 // FIXME: redeclarations? 2337 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2338 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2339 Decl->TypeForDecl = T; 2340 Types.push_back(T); 2341 return QualType(T, 0); 2342} 2343 2344/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2345/// TypeOfExprType AST's (since expression's are never shared). For example, 2346/// multiple declarations that refer to "typeof(x)" all contain different 2347/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2348/// on canonical type's (which are always unique). 2349QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2350 TypeOfExprType *toe; 2351 if (tofExpr->isTypeDependent()) { 2352 llvm::FoldingSetNodeID ID; 2353 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2354 2355 void *InsertPos = 0; 2356 DependentTypeOfExprType *Canon 2357 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2358 if (Canon) { 2359 // We already have a "canonical" version of an identical, dependent 2360 // typeof(expr) type. Use that as our canonical type. 2361 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2362 QualType((TypeOfExprType*)Canon, 0)); 2363 } 2364 else { 2365 // Build a new, canonical typeof(expr) type. 2366 Canon 2367 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2368 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2369 toe = Canon; 2370 } 2371 } else { 2372 QualType Canonical = getCanonicalType(tofExpr->getType()); 2373 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2374 } 2375 Types.push_back(toe); 2376 return QualType(toe, 0); 2377} 2378 2379/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2380/// TypeOfType AST's. The only motivation to unique these nodes would be 2381/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2382/// an issue. This doesn't effect the type checker, since it operates 2383/// on canonical type's (which are always unique). 2384QualType ASTContext::getTypeOfType(QualType tofType) { 2385 QualType Canonical = getCanonicalType(tofType); 2386 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2387 Types.push_back(tot); 2388 return QualType(tot, 0); 2389} 2390 2391/// getDecltypeForExpr - Given an expr, will return the decltype for that 2392/// expression, according to the rules in C++0x [dcl.type.simple]p4 2393static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2394 if (e->isTypeDependent()) 2395 return Context.DependentTy; 2396 2397 // If e is an id expression or a class member access, decltype(e) is defined 2398 // as the type of the entity named by e. 2399 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2400 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2401 return VD->getType(); 2402 } 2403 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2404 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2405 return FD->getType(); 2406 } 2407 // If e is a function call or an invocation of an overloaded operator, 2408 // (parentheses around e are ignored), decltype(e) is defined as the 2409 // return type of that function. 2410 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2411 return CE->getCallReturnType(); 2412 2413 QualType T = e->getType(); 2414 2415 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2416 // defined as T&, otherwise decltype(e) is defined as T. 2417 if (e->isLValue()) 2418 T = Context.getLValueReferenceType(T); 2419 2420 return T; 2421} 2422 2423/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2424/// DecltypeType AST's. The only motivation to unique these nodes would be 2425/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2426/// an issue. This doesn't effect the type checker, since it operates 2427/// on canonical type's (which are always unique). 2428QualType ASTContext::getDecltypeType(Expr *e) { 2429 DecltypeType *dt; 2430 if (e->isTypeDependent()) { 2431 llvm::FoldingSetNodeID ID; 2432 DependentDecltypeType::Profile(ID, *this, e); 2433 2434 void *InsertPos = 0; 2435 DependentDecltypeType *Canon 2436 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2437 if (Canon) { 2438 // We already have a "canonical" version of an equivalent, dependent 2439 // decltype type. Use that as our canonical type. 2440 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2441 QualType((DecltypeType*)Canon, 0)); 2442 } 2443 else { 2444 // Build a new, canonical typeof(expr) type. 2445 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2446 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2447 dt = Canon; 2448 } 2449 } else { 2450 QualType T = getDecltypeForExpr(e, *this); 2451 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2452 } 2453 Types.push_back(dt); 2454 return QualType(dt, 0); 2455} 2456 2457/// getTagDeclType - Return the unique reference to the type for the 2458/// specified TagDecl (struct/union/class/enum) decl. 2459QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2460 assert (Decl); 2461 // FIXME: What is the design on getTagDeclType when it requires casting 2462 // away const? mutable? 2463 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2464} 2465 2466/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2467/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2468/// needs to agree with the definition in <stddef.h>. 2469CanQualType ASTContext::getSizeType() const { 2470 return getFromTargetType(Target.getSizeType()); 2471} 2472 2473/// getSignedWCharType - Return the type of "signed wchar_t". 2474/// Used when in C++, as a GCC extension. 2475QualType ASTContext::getSignedWCharType() const { 2476 // FIXME: derive from "Target" ? 2477 return WCharTy; 2478} 2479 2480/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2481/// Used when in C++, as a GCC extension. 2482QualType ASTContext::getUnsignedWCharType() const { 2483 // FIXME: derive from "Target" ? 2484 return UnsignedIntTy; 2485} 2486 2487/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2488/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2489QualType ASTContext::getPointerDiffType() const { 2490 return getFromTargetType(Target.getPtrDiffType(0)); 2491} 2492 2493//===----------------------------------------------------------------------===// 2494// Type Operators 2495//===----------------------------------------------------------------------===// 2496 2497CanQualType ASTContext::getCanonicalParamType(QualType T) { 2498 // Push qualifiers into arrays, and then discard any remaining 2499 // qualifiers. 2500 T = getCanonicalType(T); 2501 T = getVariableArrayDecayedType(T); 2502 const Type *Ty = T.getTypePtr(); 2503 QualType Result; 2504 if (isa<ArrayType>(Ty)) { 2505 Result = getArrayDecayedType(QualType(Ty,0)); 2506 } else if (isa<FunctionType>(Ty)) { 2507 Result = getPointerType(QualType(Ty, 0)); 2508 } else { 2509 Result = QualType(Ty, 0); 2510 } 2511 2512 return CanQualType::CreateUnsafe(Result); 2513} 2514 2515/// getCanonicalType - Return the canonical (structural) type corresponding to 2516/// the specified potentially non-canonical type. The non-canonical version 2517/// of a type may have many "decorated" versions of types. Decorators can 2518/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2519/// to be free of any of these, allowing two canonical types to be compared 2520/// for exact equality with a simple pointer comparison. 2521CanQualType ASTContext::getCanonicalType(QualType T) { 2522 QualifierCollector Quals; 2523 const Type *Ptr = Quals.strip(T); 2524 QualType CanType = Ptr->getCanonicalTypeInternal(); 2525 2526 // The canonical internal type will be the canonical type *except* 2527 // that we push type qualifiers down through array types. 2528 2529 // If there are no new qualifiers to push down, stop here. 2530 if (!Quals.hasQualifiers()) 2531 return CanQualType::CreateUnsafe(CanType); 2532 2533 // If the type qualifiers are on an array type, get the canonical 2534 // type of the array with the qualifiers applied to the element 2535 // type. 2536 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2537 if (!AT) 2538 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2539 2540 // Get the canonical version of the element with the extra qualifiers on it. 2541 // This can recursively sink qualifiers through multiple levels of arrays. 2542 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2543 NewEltTy = getCanonicalType(NewEltTy); 2544 2545 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2546 return CanQualType::CreateUnsafe( 2547 getConstantArrayType(NewEltTy, CAT->getSize(), 2548 CAT->getSizeModifier(), 2549 CAT->getIndexTypeCVRQualifiers())); 2550 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2551 return CanQualType::CreateUnsafe( 2552 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2553 IAT->getIndexTypeCVRQualifiers())); 2554 2555 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2556 return CanQualType::CreateUnsafe( 2557 getDependentSizedArrayType(NewEltTy, 2558 DSAT->getSizeExpr(), 2559 DSAT->getSizeModifier(), 2560 DSAT->getIndexTypeCVRQualifiers(), 2561 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2562 2563 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2564 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2565 VAT->getSizeExpr(), 2566 VAT->getSizeModifier(), 2567 VAT->getIndexTypeCVRQualifiers(), 2568 VAT->getBracketsRange())); 2569} 2570 2571QualType ASTContext::getUnqualifiedArrayType(QualType T, 2572 Qualifiers &Quals) { 2573 Quals = T.getQualifiers(); 2574 const ArrayType *AT = getAsArrayType(T); 2575 if (!AT) { 2576 return T.getUnqualifiedType(); 2577 } 2578 2579 QualType Elt = AT->getElementType(); 2580 QualType UnqualElt = getUnqualifiedArrayType(Elt, Quals); 2581 if (Elt == UnqualElt) 2582 return T; 2583 2584 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 2585 return getConstantArrayType(UnqualElt, CAT->getSize(), 2586 CAT->getSizeModifier(), 0); 2587 } 2588 2589 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 2590 return getIncompleteArrayType(UnqualElt, IAT->getSizeModifier(), 0); 2591 } 2592 2593 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 2594 return getVariableArrayType(UnqualElt, 2595 VAT->getSizeExpr(), 2596 VAT->getSizeModifier(), 2597 VAT->getIndexTypeCVRQualifiers(), 2598 VAT->getBracketsRange()); 2599 } 2600 2601 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 2602 return getDependentSizedArrayType(UnqualElt, DSAT->getSizeExpr(), 2603 DSAT->getSizeModifier(), 0, 2604 SourceRange()); 2605} 2606 2607/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 2608/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 2609/// they point to and return true. If T1 and T2 aren't pointer types 2610/// or pointer-to-member types, or if they are not similar at this 2611/// level, returns false and leaves T1 and T2 unchanged. Top-level 2612/// qualifiers on T1 and T2 are ignored. This function will typically 2613/// be called in a loop that successively "unwraps" pointer and 2614/// pointer-to-member types to compare them at each level. 2615bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 2616 const PointerType *T1PtrType = T1->getAs<PointerType>(), 2617 *T2PtrType = T2->getAs<PointerType>(); 2618 if (T1PtrType && T2PtrType) { 2619 T1 = T1PtrType->getPointeeType(); 2620 T2 = T2PtrType->getPointeeType(); 2621 return true; 2622 } 2623 2624 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 2625 *T2MPType = T2->getAs<MemberPointerType>(); 2626 if (T1MPType && T2MPType && 2627 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 2628 QualType(T2MPType->getClass(), 0))) { 2629 T1 = T1MPType->getPointeeType(); 2630 T2 = T2MPType->getPointeeType(); 2631 return true; 2632 } 2633 2634 if (getLangOptions().ObjC1) { 2635 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 2636 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 2637 if (T1OPType && T2OPType) { 2638 T1 = T1OPType->getPointeeType(); 2639 T2 = T2OPType->getPointeeType(); 2640 return true; 2641 } 2642 } 2643 2644 // FIXME: Block pointers, too? 2645 2646 return false; 2647} 2648 2649DeclarationNameInfo ASTContext::getNameForTemplate(TemplateName Name, 2650 SourceLocation NameLoc) { 2651 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2652 // DNInfo work in progress: CHECKME: what about DNLoc? 2653 return DeclarationNameInfo(TD->getDeclName(), NameLoc); 2654 2655 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2656 DeclarationName DName; 2657 if (DTN->isIdentifier()) { 2658 DName = DeclarationNames.getIdentifier(DTN->getIdentifier()); 2659 return DeclarationNameInfo(DName, NameLoc); 2660 } else { 2661 DName = DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2662 // DNInfo work in progress: FIXME: source locations? 2663 DeclarationNameLoc DNLoc; 2664 DNLoc.CXXOperatorName.BeginOpNameLoc = SourceLocation().getRawEncoding(); 2665 DNLoc.CXXOperatorName.EndOpNameLoc = SourceLocation().getRawEncoding(); 2666 return DeclarationNameInfo(DName, NameLoc, DNLoc); 2667 } 2668 } 2669 2670 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2671 assert(Storage); 2672 // DNInfo work in progress: CHECKME: what about DNLoc? 2673 return DeclarationNameInfo((*Storage->begin())->getDeclName(), NameLoc); 2674} 2675 2676TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2677 if (TemplateDecl *Template = Name.getAsTemplateDecl()) { 2678 if (TemplateTemplateParmDecl *TTP 2679 = dyn_cast<TemplateTemplateParmDecl>(Template)) 2680 Template = getCanonicalTemplateTemplateParmDecl(TTP); 2681 2682 // The canonical template name is the canonical template declaration. 2683 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2684 } 2685 2686 assert(!Name.getAsOverloadedTemplate()); 2687 2688 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2689 assert(DTN && "Non-dependent template names must refer to template decls."); 2690 return DTN->CanonicalTemplateName; 2691} 2692 2693bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2694 X = getCanonicalTemplateName(X); 2695 Y = getCanonicalTemplateName(Y); 2696 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2697} 2698 2699TemplateArgument 2700ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2701 switch (Arg.getKind()) { 2702 case TemplateArgument::Null: 2703 return Arg; 2704 2705 case TemplateArgument::Expression: 2706 return Arg; 2707 2708 case TemplateArgument::Declaration: 2709 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2710 2711 case TemplateArgument::Template: 2712 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2713 2714 case TemplateArgument::Integral: 2715 return TemplateArgument(*Arg.getAsIntegral(), 2716 getCanonicalType(Arg.getIntegralType())); 2717 2718 case TemplateArgument::Type: 2719 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2720 2721 case TemplateArgument::Pack: { 2722 TemplateArgument *CanonArgs 2723 = new (*this) TemplateArgument[Arg.pack_size()]; 2724 unsigned Idx = 0; 2725 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2726 AEnd = Arg.pack_end(); 2727 A != AEnd; (void)++A, ++Idx) 2728 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2729 2730 return TemplateArgument(CanonArgs, Arg.pack_size()); 2731 } 2732 } 2733 2734 // Silence GCC warning 2735 assert(false && "Unhandled template argument kind"); 2736 return TemplateArgument(); 2737} 2738 2739NestedNameSpecifier * 2740ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2741 if (!NNS) 2742 return 0; 2743 2744 switch (NNS->getKind()) { 2745 case NestedNameSpecifier::Identifier: 2746 // Canonicalize the prefix but keep the identifier the same. 2747 return NestedNameSpecifier::Create(*this, 2748 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2749 NNS->getAsIdentifier()); 2750 2751 case NestedNameSpecifier::Namespace: 2752 // A namespace is canonical; build a nested-name-specifier with 2753 // this namespace and no prefix. 2754 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2755 2756 case NestedNameSpecifier::TypeSpec: 2757 case NestedNameSpecifier::TypeSpecWithTemplate: { 2758 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2759 2760 // If we have some kind of dependent-named type (e.g., "typename T::type"), 2761 // break it apart into its prefix and identifier, then reconsititute those 2762 // as the canonical nested-name-specifier. This is required to canonicalize 2763 // a dependent nested-name-specifier involving typedefs of dependent-name 2764 // types, e.g., 2765 // typedef typename T::type T1; 2766 // typedef typename T1::type T2; 2767 if (const DependentNameType *DNT = T->getAs<DependentNameType>()) { 2768 NestedNameSpecifier *Prefix 2769 = getCanonicalNestedNameSpecifier(DNT->getQualifier()); 2770 return NestedNameSpecifier::Create(*this, Prefix, 2771 const_cast<IdentifierInfo *>(DNT->getIdentifier())); 2772 } 2773 2774 // Do the same thing as above, but with dependent-named specializations. 2775 if (const DependentTemplateSpecializationType *DTST 2776 = T->getAs<DependentTemplateSpecializationType>()) { 2777 NestedNameSpecifier *Prefix 2778 = getCanonicalNestedNameSpecifier(DTST->getQualifier()); 2779 TemplateName Name 2780 = getDependentTemplateName(Prefix, DTST->getIdentifier()); 2781 T = getTemplateSpecializationType(Name, 2782 DTST->getArgs(), DTST->getNumArgs()); 2783 T = getCanonicalType(T); 2784 } 2785 2786 return NestedNameSpecifier::Create(*this, 0, false, T.getTypePtr()); 2787 } 2788 2789 case NestedNameSpecifier::Global: 2790 // The global specifier is canonical and unique. 2791 return NNS; 2792 } 2793 2794 // Required to silence a GCC warning 2795 return 0; 2796} 2797 2798 2799const ArrayType *ASTContext::getAsArrayType(QualType T) { 2800 // Handle the non-qualified case efficiently. 2801 if (!T.hasLocalQualifiers()) { 2802 // Handle the common positive case fast. 2803 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2804 return AT; 2805 } 2806 2807 // Handle the common negative case fast. 2808 QualType CType = T->getCanonicalTypeInternal(); 2809 if (!isa<ArrayType>(CType)) 2810 return 0; 2811 2812 // Apply any qualifiers from the array type to the element type. This 2813 // implements C99 6.7.3p8: "If the specification of an array type includes 2814 // any type qualifiers, the element type is so qualified, not the array type." 2815 2816 // If we get here, we either have type qualifiers on the type, or we have 2817 // sugar such as a typedef in the way. If we have type qualifiers on the type 2818 // we must propagate them down into the element type. 2819 2820 QualifierCollector Qs; 2821 const Type *Ty = Qs.strip(T.getDesugaredType(*this)); 2822 2823 // If we have a simple case, just return now. 2824 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2825 if (ATy == 0 || Qs.empty()) 2826 return ATy; 2827 2828 // Otherwise, we have an array and we have qualifiers on it. Push the 2829 // qualifiers into the array element type and return a new array type. 2830 // Get the canonical version of the element with the extra qualifiers on it. 2831 // This can recursively sink qualifiers through multiple levels of arrays. 2832 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2833 2834 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2835 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2836 CAT->getSizeModifier(), 2837 CAT->getIndexTypeCVRQualifiers())); 2838 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2839 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2840 IAT->getSizeModifier(), 2841 IAT->getIndexTypeCVRQualifiers())); 2842 2843 if (const DependentSizedArrayType *DSAT 2844 = dyn_cast<DependentSizedArrayType>(ATy)) 2845 return cast<ArrayType>( 2846 getDependentSizedArrayType(NewEltTy, 2847 DSAT->getSizeExpr(), 2848 DSAT->getSizeModifier(), 2849 DSAT->getIndexTypeCVRQualifiers(), 2850 DSAT->getBracketsRange())); 2851 2852 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2853 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2854 VAT->getSizeExpr(), 2855 VAT->getSizeModifier(), 2856 VAT->getIndexTypeCVRQualifiers(), 2857 VAT->getBracketsRange())); 2858} 2859 2860/// getArrayDecayedType - Return the properly qualified result of decaying the 2861/// specified array type to a pointer. This operation is non-trivial when 2862/// handling typedefs etc. The canonical type of "T" must be an array type, 2863/// this returns a pointer to a properly qualified element of the array. 2864/// 2865/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2866QualType ASTContext::getArrayDecayedType(QualType Ty) { 2867 // Get the element type with 'getAsArrayType' so that we don't lose any 2868 // typedefs in the element type of the array. This also handles propagation 2869 // of type qualifiers from the array type into the element type if present 2870 // (C99 6.7.3p8). 2871 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2872 assert(PrettyArrayType && "Not an array type!"); 2873 2874 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2875 2876 // int x[restrict 4] -> int *restrict 2877 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2878} 2879 2880QualType ASTContext::getBaseElementType(QualType QT) { 2881 QualifierCollector Qs; 2882 while (const ArrayType *AT = getAsArrayType(QualType(Qs.strip(QT), 0))) 2883 QT = AT->getElementType(); 2884 return Qs.apply(*this, QT); 2885} 2886 2887QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2888 QualType ElemTy = AT->getElementType(); 2889 2890 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2891 return getBaseElementType(AT); 2892 2893 return ElemTy; 2894} 2895 2896/// getConstantArrayElementCount - Returns number of constant array elements. 2897uint64_t 2898ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2899 uint64_t ElementCount = 1; 2900 do { 2901 ElementCount *= CA->getSize().getZExtValue(); 2902 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2903 } while (CA); 2904 return ElementCount; 2905} 2906 2907/// getFloatingRank - Return a relative rank for floating point types. 2908/// This routine will assert if passed a built-in type that isn't a float. 2909static FloatingRank getFloatingRank(QualType T) { 2910 if (const ComplexType *CT = T->getAs<ComplexType>()) 2911 return getFloatingRank(CT->getElementType()); 2912 2913 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2914 switch (T->getAs<BuiltinType>()->getKind()) { 2915 default: assert(0 && "getFloatingRank(): not a floating type"); 2916 case BuiltinType::Float: return FloatRank; 2917 case BuiltinType::Double: return DoubleRank; 2918 case BuiltinType::LongDouble: return LongDoubleRank; 2919 } 2920} 2921 2922/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2923/// point or a complex type (based on typeDomain/typeSize). 2924/// 'typeDomain' is a real floating point or complex type. 2925/// 'typeSize' is a real floating point or complex type. 2926QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2927 QualType Domain) const { 2928 FloatingRank EltRank = getFloatingRank(Size); 2929 if (Domain->isComplexType()) { 2930 switch (EltRank) { 2931 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2932 case FloatRank: return FloatComplexTy; 2933 case DoubleRank: return DoubleComplexTy; 2934 case LongDoubleRank: return LongDoubleComplexTy; 2935 } 2936 } 2937 2938 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2939 switch (EltRank) { 2940 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2941 case FloatRank: return FloatTy; 2942 case DoubleRank: return DoubleTy; 2943 case LongDoubleRank: return LongDoubleTy; 2944 } 2945} 2946 2947/// getFloatingTypeOrder - Compare the rank of the two specified floating 2948/// point types, ignoring the domain of the type (i.e. 'double' == 2949/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2950/// LHS < RHS, return -1. 2951int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2952 FloatingRank LHSR = getFloatingRank(LHS); 2953 FloatingRank RHSR = getFloatingRank(RHS); 2954 2955 if (LHSR == RHSR) 2956 return 0; 2957 if (LHSR > RHSR) 2958 return 1; 2959 return -1; 2960} 2961 2962/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2963/// routine will assert if passed a built-in type that isn't an integer or enum, 2964/// or if it is not canonicalized. 2965unsigned ASTContext::getIntegerRank(Type *T) { 2966 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2967 if (EnumType* ET = dyn_cast<EnumType>(T)) 2968 T = ET->getDecl()->getPromotionType().getTypePtr(); 2969 2970 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2971 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2972 2973 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2974 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2975 2976 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2977 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2978 2979 switch (cast<BuiltinType>(T)->getKind()) { 2980 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2981 case BuiltinType::Bool: 2982 return 1 + (getIntWidth(BoolTy) << 3); 2983 case BuiltinType::Char_S: 2984 case BuiltinType::Char_U: 2985 case BuiltinType::SChar: 2986 case BuiltinType::UChar: 2987 return 2 + (getIntWidth(CharTy) << 3); 2988 case BuiltinType::Short: 2989 case BuiltinType::UShort: 2990 return 3 + (getIntWidth(ShortTy) << 3); 2991 case BuiltinType::Int: 2992 case BuiltinType::UInt: 2993 return 4 + (getIntWidth(IntTy) << 3); 2994 case BuiltinType::Long: 2995 case BuiltinType::ULong: 2996 return 5 + (getIntWidth(LongTy) << 3); 2997 case BuiltinType::LongLong: 2998 case BuiltinType::ULongLong: 2999 return 6 + (getIntWidth(LongLongTy) << 3); 3000 case BuiltinType::Int128: 3001 case BuiltinType::UInt128: 3002 return 7 + (getIntWidth(Int128Ty) << 3); 3003 } 3004} 3005 3006/// \brief Whether this is a promotable bitfield reference according 3007/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 3008/// 3009/// \returns the type this bit-field will promote to, or NULL if no 3010/// promotion occurs. 3011QualType ASTContext::isPromotableBitField(Expr *E) { 3012 if (E->isTypeDependent() || E->isValueDependent()) 3013 return QualType(); 3014 3015 FieldDecl *Field = E->getBitField(); 3016 if (!Field) 3017 return QualType(); 3018 3019 QualType FT = Field->getType(); 3020 3021 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 3022 uint64_t BitWidth = BitWidthAP.getZExtValue(); 3023 uint64_t IntSize = getTypeSize(IntTy); 3024 // GCC extension compatibility: if the bit-field size is less than or equal 3025 // to the size of int, it gets promoted no matter what its type is. 3026 // For instance, unsigned long bf : 4 gets promoted to signed int. 3027 if (BitWidth < IntSize) 3028 return IntTy; 3029 3030 if (BitWidth == IntSize) 3031 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 3032 3033 // Types bigger than int are not subject to promotions, and therefore act 3034 // like the base type. 3035 // FIXME: This doesn't quite match what gcc does, but what gcc does here 3036 // is ridiculous. 3037 return QualType(); 3038} 3039 3040/// getPromotedIntegerType - Returns the type that Promotable will 3041/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 3042/// integer type. 3043QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 3044 assert(!Promotable.isNull()); 3045 assert(Promotable->isPromotableIntegerType()); 3046 if (const EnumType *ET = Promotable->getAs<EnumType>()) 3047 return ET->getDecl()->getPromotionType(); 3048 if (Promotable->isSignedIntegerType()) 3049 return IntTy; 3050 uint64_t PromotableSize = getTypeSize(Promotable); 3051 uint64_t IntSize = getTypeSize(IntTy); 3052 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 3053 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 3054} 3055 3056/// getIntegerTypeOrder - Returns the highest ranked integer type: 3057/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 3058/// LHS < RHS, return -1. 3059int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 3060 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 3061 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 3062 if (LHSC == RHSC) return 0; 3063 3064 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 3065 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 3066 3067 unsigned LHSRank = getIntegerRank(LHSC); 3068 unsigned RHSRank = getIntegerRank(RHSC); 3069 3070 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 3071 if (LHSRank == RHSRank) return 0; 3072 return LHSRank > RHSRank ? 1 : -1; 3073 } 3074 3075 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 3076 if (LHSUnsigned) { 3077 // If the unsigned [LHS] type is larger, return it. 3078 if (LHSRank >= RHSRank) 3079 return 1; 3080 3081 // If the signed type can represent all values of the unsigned type, it 3082 // wins. Because we are dealing with 2's complement and types that are 3083 // powers of two larger than each other, this is always safe. 3084 return -1; 3085 } 3086 3087 // If the unsigned [RHS] type is larger, return it. 3088 if (RHSRank >= LHSRank) 3089 return -1; 3090 3091 // If the signed type can represent all values of the unsigned type, it 3092 // wins. Because we are dealing with 2's complement and types that are 3093 // powers of two larger than each other, this is always safe. 3094 return 1; 3095} 3096 3097static RecordDecl * 3098CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 3099 SourceLocation L, IdentifierInfo *Id) { 3100 if (Ctx.getLangOptions().CPlusPlus) 3101 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 3102 else 3103 return RecordDecl::Create(Ctx, TK, DC, L, Id); 3104} 3105 3106// getCFConstantStringType - Return the type used for constant CFStrings. 3107QualType ASTContext::getCFConstantStringType() { 3108 if (!CFConstantStringTypeDecl) { 3109 CFConstantStringTypeDecl = 3110 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3111 &Idents.get("NSConstantString")); 3112 CFConstantStringTypeDecl->startDefinition(); 3113 3114 QualType FieldTypes[4]; 3115 3116 // const int *isa; 3117 FieldTypes[0] = getPointerType(IntTy.withConst()); 3118 // int flags; 3119 FieldTypes[1] = IntTy; 3120 // const char *str; 3121 FieldTypes[2] = getPointerType(CharTy.withConst()); 3122 // long length; 3123 FieldTypes[3] = LongTy; 3124 3125 // Create fields 3126 for (unsigned i = 0; i < 4; ++i) { 3127 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 3128 SourceLocation(), 0, 3129 FieldTypes[i], /*TInfo=*/0, 3130 /*BitWidth=*/0, 3131 /*Mutable=*/false); 3132 Field->setAccess(AS_public); 3133 CFConstantStringTypeDecl->addDecl(Field); 3134 } 3135 3136 CFConstantStringTypeDecl->completeDefinition(); 3137 } 3138 3139 return getTagDeclType(CFConstantStringTypeDecl); 3140} 3141 3142void ASTContext::setCFConstantStringType(QualType T) { 3143 const RecordType *Rec = T->getAs<RecordType>(); 3144 assert(Rec && "Invalid CFConstantStringType"); 3145 CFConstantStringTypeDecl = Rec->getDecl(); 3146} 3147 3148// getNSConstantStringType - Return the type used for constant NSStrings. 3149QualType ASTContext::getNSConstantStringType() { 3150 if (!NSConstantStringTypeDecl) { 3151 NSConstantStringTypeDecl = 3152 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3153 &Idents.get("__builtin_NSString")); 3154 NSConstantStringTypeDecl->startDefinition(); 3155 3156 QualType FieldTypes[3]; 3157 3158 // const int *isa; 3159 FieldTypes[0] = getPointerType(IntTy.withConst()); 3160 // const char *str; 3161 FieldTypes[1] = getPointerType(CharTy.withConst()); 3162 // unsigned int length; 3163 FieldTypes[2] = UnsignedIntTy; 3164 3165 // Create fields 3166 for (unsigned i = 0; i < 3; ++i) { 3167 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 3168 SourceLocation(), 0, 3169 FieldTypes[i], /*TInfo=*/0, 3170 /*BitWidth=*/0, 3171 /*Mutable=*/false); 3172 Field->setAccess(AS_public); 3173 NSConstantStringTypeDecl->addDecl(Field); 3174 } 3175 3176 NSConstantStringTypeDecl->completeDefinition(); 3177 } 3178 3179 return getTagDeclType(NSConstantStringTypeDecl); 3180} 3181 3182void ASTContext::setNSConstantStringType(QualType T) { 3183 const RecordType *Rec = T->getAs<RecordType>(); 3184 assert(Rec && "Invalid NSConstantStringType"); 3185 NSConstantStringTypeDecl = Rec->getDecl(); 3186} 3187 3188QualType ASTContext::getObjCFastEnumerationStateType() { 3189 if (!ObjCFastEnumerationStateTypeDecl) { 3190 ObjCFastEnumerationStateTypeDecl = 3191 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3192 &Idents.get("__objcFastEnumerationState")); 3193 ObjCFastEnumerationStateTypeDecl->startDefinition(); 3194 3195 QualType FieldTypes[] = { 3196 UnsignedLongTy, 3197 getPointerType(ObjCIdTypedefType), 3198 getPointerType(UnsignedLongTy), 3199 getConstantArrayType(UnsignedLongTy, 3200 llvm::APInt(32, 5), ArrayType::Normal, 0) 3201 }; 3202 3203 for (size_t i = 0; i < 4; ++i) { 3204 FieldDecl *Field = FieldDecl::Create(*this, 3205 ObjCFastEnumerationStateTypeDecl, 3206 SourceLocation(), 0, 3207 FieldTypes[i], /*TInfo=*/0, 3208 /*BitWidth=*/0, 3209 /*Mutable=*/false); 3210 Field->setAccess(AS_public); 3211 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 3212 } 3213 3214 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 3215 } 3216 3217 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 3218} 3219 3220QualType ASTContext::getBlockDescriptorType() { 3221 if (BlockDescriptorType) 3222 return getTagDeclType(BlockDescriptorType); 3223 3224 RecordDecl *T; 3225 // FIXME: Needs the FlagAppleBlock bit. 3226 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3227 &Idents.get("__block_descriptor")); 3228 T->startDefinition(); 3229 3230 QualType FieldTypes[] = { 3231 UnsignedLongTy, 3232 UnsignedLongTy, 3233 }; 3234 3235 const char *FieldNames[] = { 3236 "reserved", 3237 "Size" 3238 }; 3239 3240 for (size_t i = 0; i < 2; ++i) { 3241 FieldDecl *Field = FieldDecl::Create(*this, 3242 T, 3243 SourceLocation(), 3244 &Idents.get(FieldNames[i]), 3245 FieldTypes[i], /*TInfo=*/0, 3246 /*BitWidth=*/0, 3247 /*Mutable=*/false); 3248 Field->setAccess(AS_public); 3249 T->addDecl(Field); 3250 } 3251 3252 T->completeDefinition(); 3253 3254 BlockDescriptorType = T; 3255 3256 return getTagDeclType(BlockDescriptorType); 3257} 3258 3259void ASTContext::setBlockDescriptorType(QualType T) { 3260 const RecordType *Rec = T->getAs<RecordType>(); 3261 assert(Rec && "Invalid BlockDescriptorType"); 3262 BlockDescriptorType = Rec->getDecl(); 3263} 3264 3265QualType ASTContext::getBlockDescriptorExtendedType() { 3266 if (BlockDescriptorExtendedType) 3267 return getTagDeclType(BlockDescriptorExtendedType); 3268 3269 RecordDecl *T; 3270 // FIXME: Needs the FlagAppleBlock bit. 3271 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3272 &Idents.get("__block_descriptor_withcopydispose")); 3273 T->startDefinition(); 3274 3275 QualType FieldTypes[] = { 3276 UnsignedLongTy, 3277 UnsignedLongTy, 3278 getPointerType(VoidPtrTy), 3279 getPointerType(VoidPtrTy) 3280 }; 3281 3282 const char *FieldNames[] = { 3283 "reserved", 3284 "Size", 3285 "CopyFuncPtr", 3286 "DestroyFuncPtr" 3287 }; 3288 3289 for (size_t i = 0; i < 4; ++i) { 3290 FieldDecl *Field = FieldDecl::Create(*this, 3291 T, 3292 SourceLocation(), 3293 &Idents.get(FieldNames[i]), 3294 FieldTypes[i], /*TInfo=*/0, 3295 /*BitWidth=*/0, 3296 /*Mutable=*/false); 3297 Field->setAccess(AS_public); 3298 T->addDecl(Field); 3299 } 3300 3301 T->completeDefinition(); 3302 3303 BlockDescriptorExtendedType = T; 3304 3305 return getTagDeclType(BlockDescriptorExtendedType); 3306} 3307 3308void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3309 const RecordType *Rec = T->getAs<RecordType>(); 3310 assert(Rec && "Invalid BlockDescriptorType"); 3311 BlockDescriptorExtendedType = Rec->getDecl(); 3312} 3313 3314bool ASTContext::BlockRequiresCopying(QualType Ty) { 3315 if (Ty->isBlockPointerType()) 3316 return true; 3317 if (isObjCNSObjectType(Ty)) 3318 return true; 3319 if (Ty->isObjCObjectPointerType()) 3320 return true; 3321 if (getLangOptions().CPlusPlus) { 3322 if (const RecordType *RT = Ty->getAs<RecordType>()) { 3323 CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 3324 return RD->hasConstCopyConstructor(*this); 3325 3326 } 3327 } 3328 return false; 3329} 3330 3331QualType ASTContext::BuildByRefType(llvm::StringRef DeclName, QualType Ty) { 3332 // type = struct __Block_byref_1_X { 3333 // void *__isa; 3334 // struct __Block_byref_1_X *__forwarding; 3335 // unsigned int __flags; 3336 // unsigned int __size; 3337 // void *__copy_helper; // as needed 3338 // void *__destroy_help // as needed 3339 // int X; 3340 // } * 3341 3342 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3343 3344 // FIXME: Move up 3345 llvm::SmallString<36> Name; 3346 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3347 ++UniqueBlockByRefTypeID << '_' << DeclName; 3348 RecordDecl *T; 3349 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3350 &Idents.get(Name.str())); 3351 T->startDefinition(); 3352 QualType Int32Ty = IntTy; 3353 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3354 QualType FieldTypes[] = { 3355 getPointerType(VoidPtrTy), 3356 getPointerType(getTagDeclType(T)), 3357 Int32Ty, 3358 Int32Ty, 3359 getPointerType(VoidPtrTy), 3360 getPointerType(VoidPtrTy), 3361 Ty 3362 }; 3363 3364 llvm::StringRef FieldNames[] = { 3365 "__isa", 3366 "__forwarding", 3367 "__flags", 3368 "__size", 3369 "__copy_helper", 3370 "__destroy_helper", 3371 DeclName, 3372 }; 3373 3374 for (size_t i = 0; i < 7; ++i) { 3375 if (!HasCopyAndDispose && i >=4 && i <= 5) 3376 continue; 3377 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3378 &Idents.get(FieldNames[i]), 3379 FieldTypes[i], /*TInfo=*/0, 3380 /*BitWidth=*/0, /*Mutable=*/false); 3381 Field->setAccess(AS_public); 3382 T->addDecl(Field); 3383 } 3384 3385 T->completeDefinition(); 3386 3387 return getPointerType(getTagDeclType(T)); 3388} 3389 3390 3391QualType ASTContext::getBlockParmType( 3392 bool BlockHasCopyDispose, 3393 llvm::SmallVectorImpl<const Expr *> &Layout) { 3394 3395 // FIXME: Move up 3396 llvm::SmallString<36> Name; 3397 llvm::raw_svector_ostream(Name) << "__block_literal_" 3398 << ++UniqueBlockParmTypeID; 3399 RecordDecl *T; 3400 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3401 &Idents.get(Name.str())); 3402 T->startDefinition(); 3403 QualType FieldTypes[] = { 3404 getPointerType(VoidPtrTy), 3405 IntTy, 3406 IntTy, 3407 getPointerType(VoidPtrTy), 3408 (BlockHasCopyDispose ? 3409 getPointerType(getBlockDescriptorExtendedType()) : 3410 getPointerType(getBlockDescriptorType())) 3411 }; 3412 3413 const char *FieldNames[] = { 3414 "__isa", 3415 "__flags", 3416 "__reserved", 3417 "__FuncPtr", 3418 "__descriptor" 3419 }; 3420 3421 for (size_t i = 0; i < 5; ++i) { 3422 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3423 &Idents.get(FieldNames[i]), 3424 FieldTypes[i], /*TInfo=*/0, 3425 /*BitWidth=*/0, /*Mutable=*/false); 3426 Field->setAccess(AS_public); 3427 T->addDecl(Field); 3428 } 3429 3430 for (unsigned i = 0; i < Layout.size(); ++i) { 3431 const Expr *E = Layout[i]; 3432 3433 QualType FieldType = E->getType(); 3434 IdentifierInfo *FieldName = 0; 3435 if (isa<CXXThisExpr>(E)) { 3436 FieldName = &Idents.get("this"); 3437 } else if (const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E)) { 3438 const ValueDecl *D = BDRE->getDecl(); 3439 FieldName = D->getIdentifier(); 3440 if (BDRE->isByRef()) 3441 FieldType = BuildByRefType(D->getName(), FieldType); 3442 } else { 3443 // Padding. 3444 assert(isa<ConstantArrayType>(FieldType) && 3445 isa<DeclRefExpr>(E) && 3446 !cast<DeclRefExpr>(E)->getDecl()->getDeclName() && 3447 "doesn't match characteristics of padding decl"); 3448 } 3449 3450 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3451 FieldName, FieldType, /*TInfo=*/0, 3452 /*BitWidth=*/0, /*Mutable=*/false); 3453 Field->setAccess(AS_public); 3454 T->addDecl(Field); 3455 } 3456 3457 T->completeDefinition(); 3458 3459 return getPointerType(getTagDeclType(T)); 3460} 3461 3462void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3463 const RecordType *Rec = T->getAs<RecordType>(); 3464 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3465 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3466} 3467 3468// This returns true if a type has been typedefed to BOOL: 3469// typedef <type> BOOL; 3470static bool isTypeTypedefedAsBOOL(QualType T) { 3471 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3472 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3473 return II->isStr("BOOL"); 3474 3475 return false; 3476} 3477 3478/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3479/// purpose. 3480CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) { 3481 CharUnits sz = getTypeSizeInChars(type); 3482 3483 // Make all integer and enum types at least as large as an int 3484 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 3485 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3486 // Treat arrays as pointers, since that's how they're passed in. 3487 else if (type->isArrayType()) 3488 sz = getTypeSizeInChars(VoidPtrTy); 3489 return sz; 3490} 3491 3492static inline 3493std::string charUnitsToString(const CharUnits &CU) { 3494 return llvm::itostr(CU.getQuantity()); 3495} 3496 3497/// getObjCEncodingForBlockDecl - Return the encoded type for this block 3498/// declaration. 3499void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3500 std::string& S) { 3501 const BlockDecl *Decl = Expr->getBlockDecl(); 3502 QualType BlockTy = 3503 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3504 // Encode result type. 3505 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3506 // Compute size of all parameters. 3507 // Start with computing size of a pointer in number of bytes. 3508 // FIXME: There might(should) be a better way of doing this computation! 3509 SourceLocation Loc; 3510 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3511 CharUnits ParmOffset = PtrSize; 3512 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3513 E = Decl->param_end(); PI != E; ++PI) { 3514 QualType PType = (*PI)->getType(); 3515 CharUnits sz = getObjCEncodingTypeSize(PType); 3516 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3517 ParmOffset += sz; 3518 } 3519 // Size of the argument frame 3520 S += charUnitsToString(ParmOffset); 3521 // Block pointer and offset. 3522 S += "@?0"; 3523 ParmOffset = PtrSize; 3524 3525 // Argument types. 3526 ParmOffset = PtrSize; 3527 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3528 Decl->param_end(); PI != E; ++PI) { 3529 ParmVarDecl *PVDecl = *PI; 3530 QualType PType = PVDecl->getOriginalType(); 3531 if (const ArrayType *AT = 3532 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3533 // Use array's original type only if it has known number of 3534 // elements. 3535 if (!isa<ConstantArrayType>(AT)) 3536 PType = PVDecl->getType(); 3537 } else if (PType->isFunctionType()) 3538 PType = PVDecl->getType(); 3539 getObjCEncodingForType(PType, S); 3540 S += charUnitsToString(ParmOffset); 3541 ParmOffset += getObjCEncodingTypeSize(PType); 3542 } 3543} 3544 3545/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3546/// declaration. 3547void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3548 std::string& S) { 3549 // FIXME: This is not very efficient. 3550 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3551 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3552 // Encode result type. 3553 getObjCEncodingForType(Decl->getResultType(), S); 3554 // Compute size of all parameters. 3555 // Start with computing size of a pointer in number of bytes. 3556 // FIXME: There might(should) be a better way of doing this computation! 3557 SourceLocation Loc; 3558 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3559 // The first two arguments (self and _cmd) are pointers; account for 3560 // their size. 3561 CharUnits ParmOffset = 2 * PtrSize; 3562 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3563 E = Decl->sel_param_end(); PI != E; ++PI) { 3564 QualType PType = (*PI)->getType(); 3565 CharUnits sz = getObjCEncodingTypeSize(PType); 3566 assert (sz.isPositive() && 3567 "getObjCEncodingForMethodDecl - Incomplete param type"); 3568 ParmOffset += sz; 3569 } 3570 S += charUnitsToString(ParmOffset); 3571 S += "@0:"; 3572 S += charUnitsToString(PtrSize); 3573 3574 // Argument types. 3575 ParmOffset = 2 * PtrSize; 3576 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3577 E = Decl->sel_param_end(); PI != E; ++PI) { 3578 ParmVarDecl *PVDecl = *PI; 3579 QualType PType = PVDecl->getOriginalType(); 3580 if (const ArrayType *AT = 3581 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3582 // Use array's original type only if it has known number of 3583 // elements. 3584 if (!isa<ConstantArrayType>(AT)) 3585 PType = PVDecl->getType(); 3586 } else if (PType->isFunctionType()) 3587 PType = PVDecl->getType(); 3588 // Process argument qualifiers for user supplied arguments; such as, 3589 // 'in', 'inout', etc. 3590 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3591 getObjCEncodingForType(PType, S); 3592 S += charUnitsToString(ParmOffset); 3593 ParmOffset += getObjCEncodingTypeSize(PType); 3594 } 3595} 3596 3597/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3598/// property declaration. If non-NULL, Container must be either an 3599/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3600/// NULL when getting encodings for protocol properties. 3601/// Property attributes are stored as a comma-delimited C string. The simple 3602/// attributes readonly and bycopy are encoded as single characters. The 3603/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3604/// encoded as single characters, followed by an identifier. Property types 3605/// are also encoded as a parametrized attribute. The characters used to encode 3606/// these attributes are defined by the following enumeration: 3607/// @code 3608/// enum PropertyAttributes { 3609/// kPropertyReadOnly = 'R', // property is read-only. 3610/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3611/// kPropertyByref = '&', // property is a reference to the value last assigned 3612/// kPropertyDynamic = 'D', // property is dynamic 3613/// kPropertyGetter = 'G', // followed by getter selector name 3614/// kPropertySetter = 'S', // followed by setter selector name 3615/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3616/// kPropertyType = 't' // followed by old-style type encoding. 3617/// kPropertyWeak = 'W' // 'weak' property 3618/// kPropertyStrong = 'P' // property GC'able 3619/// kPropertyNonAtomic = 'N' // property non-atomic 3620/// }; 3621/// @endcode 3622void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3623 const Decl *Container, 3624 std::string& S) { 3625 // Collect information from the property implementation decl(s). 3626 bool Dynamic = false; 3627 ObjCPropertyImplDecl *SynthesizePID = 0; 3628 3629 // FIXME: Duplicated code due to poor abstraction. 3630 if (Container) { 3631 if (const ObjCCategoryImplDecl *CID = 3632 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3633 for (ObjCCategoryImplDecl::propimpl_iterator 3634 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3635 i != e; ++i) { 3636 ObjCPropertyImplDecl *PID = *i; 3637 if (PID->getPropertyDecl() == PD) { 3638 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3639 Dynamic = true; 3640 } else { 3641 SynthesizePID = PID; 3642 } 3643 } 3644 } 3645 } else { 3646 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3647 for (ObjCCategoryImplDecl::propimpl_iterator 3648 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3649 i != e; ++i) { 3650 ObjCPropertyImplDecl *PID = *i; 3651 if (PID->getPropertyDecl() == PD) { 3652 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3653 Dynamic = true; 3654 } else { 3655 SynthesizePID = PID; 3656 } 3657 } 3658 } 3659 } 3660 } 3661 3662 // FIXME: This is not very efficient. 3663 S = "T"; 3664 3665 // Encode result type. 3666 // GCC has some special rules regarding encoding of properties which 3667 // closely resembles encoding of ivars. 3668 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3669 true /* outermost type */, 3670 true /* encoding for property */); 3671 3672 if (PD->isReadOnly()) { 3673 S += ",R"; 3674 } else { 3675 switch (PD->getSetterKind()) { 3676 case ObjCPropertyDecl::Assign: break; 3677 case ObjCPropertyDecl::Copy: S += ",C"; break; 3678 case ObjCPropertyDecl::Retain: S += ",&"; break; 3679 } 3680 } 3681 3682 // It really isn't clear at all what this means, since properties 3683 // are "dynamic by default". 3684 if (Dynamic) 3685 S += ",D"; 3686 3687 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3688 S += ",N"; 3689 3690 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3691 S += ",G"; 3692 S += PD->getGetterName().getAsString(); 3693 } 3694 3695 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3696 S += ",S"; 3697 S += PD->getSetterName().getAsString(); 3698 } 3699 3700 if (SynthesizePID) { 3701 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3702 S += ",V"; 3703 S += OID->getNameAsString(); 3704 } 3705 3706 // FIXME: OBJCGC: weak & strong 3707} 3708 3709/// getLegacyIntegralTypeEncoding - 3710/// Another legacy compatibility encoding: 32-bit longs are encoded as 3711/// 'l' or 'L' , but not always. For typedefs, we need to use 3712/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3713/// 3714void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3715 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3716 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3717 if (BT->getKind() == BuiltinType::ULong && 3718 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3719 PointeeTy = UnsignedIntTy; 3720 else 3721 if (BT->getKind() == BuiltinType::Long && 3722 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3723 PointeeTy = IntTy; 3724 } 3725 } 3726} 3727 3728void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3729 const FieldDecl *Field) { 3730 // We follow the behavior of gcc, expanding structures which are 3731 // directly pointed to, and expanding embedded structures. Note that 3732 // these rules are sufficient to prevent recursive encoding of the 3733 // same type. 3734 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3735 true /* outermost type */); 3736} 3737 3738static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 3739 switch (T->getAs<BuiltinType>()->getKind()) { 3740 default: assert(0 && "Unhandled builtin type kind"); 3741 case BuiltinType::Void: return 'v'; 3742 case BuiltinType::Bool: return 'B'; 3743 case BuiltinType::Char_U: 3744 case BuiltinType::UChar: return 'C'; 3745 case BuiltinType::UShort: return 'S'; 3746 case BuiltinType::UInt: return 'I'; 3747 case BuiltinType::ULong: 3748 return 3749 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3750 case BuiltinType::UInt128: return 'T'; 3751 case BuiltinType::ULongLong: return 'Q'; 3752 case BuiltinType::Char_S: 3753 case BuiltinType::SChar: return 'c'; 3754 case BuiltinType::Short: return 's'; 3755 case BuiltinType::WChar: 3756 case BuiltinType::Int: return 'i'; 3757 case BuiltinType::Long: 3758 return 3759 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'l' : 'q'; 3760 case BuiltinType::LongLong: return 'q'; 3761 case BuiltinType::Int128: return 't'; 3762 case BuiltinType::Float: return 'f'; 3763 case BuiltinType::Double: return 'd'; 3764 case BuiltinType::LongDouble: return 'D'; 3765 } 3766} 3767 3768static void EncodeBitField(const ASTContext *Context, std::string& S, 3769 QualType T, const FieldDecl *FD) { 3770 const Expr *E = FD->getBitWidth(); 3771 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3772 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3773 S += 'b'; 3774 // The NeXT runtime encodes bit fields as b followed by the number of bits. 3775 // The GNU runtime requires more information; bitfields are encoded as b, 3776 // then the offset (in bits) of the first element, then the type of the 3777 // bitfield, then the size in bits. For example, in this structure: 3778 // 3779 // struct 3780 // { 3781 // int integer; 3782 // int flags:2; 3783 // }; 3784 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 3785 // runtime, but b32i2 for the GNU runtime. The reason for this extra 3786 // information is not especially sensible, but we're stuck with it for 3787 // compatibility with GCC, although providing it breaks anything that 3788 // actually uses runtime introspection and wants to work on both runtimes... 3789 if (!Ctx->getLangOptions().NeXTRuntime) { 3790 const RecordDecl *RD = FD->getParent(); 3791 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 3792 // FIXME: This same linear search is also used in ExprConstant - it might 3793 // be better if the FieldDecl stored its offset. We'd be increasing the 3794 // size of the object slightly, but saving some time every time it is used. 3795 unsigned i = 0; 3796 for (RecordDecl::field_iterator Field = RD->field_begin(), 3797 FieldEnd = RD->field_end(); 3798 Field != FieldEnd; (void)++Field, ++i) { 3799 if (*Field == FD) 3800 break; 3801 } 3802 S += llvm::utostr(RL.getFieldOffset(i)); 3803 S += ObjCEncodingForPrimitiveKind(Context, T); 3804 } 3805 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3806 S += llvm::utostr(N); 3807} 3808 3809// FIXME: Use SmallString for accumulating string. 3810void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3811 bool ExpandPointedToStructures, 3812 bool ExpandStructures, 3813 const FieldDecl *FD, 3814 bool OutermostType, 3815 bool EncodingProperty) { 3816 if (T->getAs<BuiltinType>()) { 3817 if (FD && FD->isBitField()) 3818 return EncodeBitField(this, S, T, FD); 3819 S += ObjCEncodingForPrimitiveKind(this, T); 3820 return; 3821 } 3822 3823 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3824 S += 'j'; 3825 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3826 false); 3827 return; 3828 } 3829 3830 // encoding for pointer or r3eference types. 3831 QualType PointeeTy; 3832 if (const PointerType *PT = T->getAs<PointerType>()) { 3833 if (PT->isObjCSelType()) { 3834 S += ':'; 3835 return; 3836 } 3837 PointeeTy = PT->getPointeeType(); 3838 } 3839 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3840 PointeeTy = RT->getPointeeType(); 3841 if (!PointeeTy.isNull()) { 3842 bool isReadOnly = false; 3843 // For historical/compatibility reasons, the read-only qualifier of the 3844 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3845 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3846 // Also, do not emit the 'r' for anything but the outermost type! 3847 if (isa<TypedefType>(T.getTypePtr())) { 3848 if (OutermostType && T.isConstQualified()) { 3849 isReadOnly = true; 3850 S += 'r'; 3851 } 3852 } else if (OutermostType) { 3853 QualType P = PointeeTy; 3854 while (P->getAs<PointerType>()) 3855 P = P->getAs<PointerType>()->getPointeeType(); 3856 if (P.isConstQualified()) { 3857 isReadOnly = true; 3858 S += 'r'; 3859 } 3860 } 3861 if (isReadOnly) { 3862 // Another legacy compatibility encoding. Some ObjC qualifier and type 3863 // combinations need to be rearranged. 3864 // Rewrite "in const" from "nr" to "rn" 3865 if (llvm::StringRef(S).endswith("nr")) 3866 S.replace(S.end()-2, S.end(), "rn"); 3867 } 3868 3869 if (PointeeTy->isCharType()) { 3870 // char pointer types should be encoded as '*' unless it is a 3871 // type that has been typedef'd to 'BOOL'. 3872 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3873 S += '*'; 3874 return; 3875 } 3876 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3877 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3878 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3879 S += '#'; 3880 return; 3881 } 3882 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3883 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3884 S += '@'; 3885 return; 3886 } 3887 // fall through... 3888 } 3889 S += '^'; 3890 getLegacyIntegralTypeEncoding(PointeeTy); 3891 3892 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3893 NULL); 3894 return; 3895 } 3896 3897 if (const ArrayType *AT = 3898 // Ignore type qualifiers etc. 3899 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3900 if (isa<IncompleteArrayType>(AT)) { 3901 // Incomplete arrays are encoded as a pointer to the array element. 3902 S += '^'; 3903 3904 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3905 false, ExpandStructures, FD); 3906 } else { 3907 S += '['; 3908 3909 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3910 S += llvm::utostr(CAT->getSize().getZExtValue()); 3911 else { 3912 //Variable length arrays are encoded as a regular array with 0 elements. 3913 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3914 S += '0'; 3915 } 3916 3917 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3918 false, ExpandStructures, FD); 3919 S += ']'; 3920 } 3921 return; 3922 } 3923 3924 if (T->getAs<FunctionType>()) { 3925 S += '?'; 3926 return; 3927 } 3928 3929 if (const RecordType *RTy = T->getAs<RecordType>()) { 3930 RecordDecl *RDecl = RTy->getDecl(); 3931 S += RDecl->isUnion() ? '(' : '{'; 3932 // Anonymous structures print as '?' 3933 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3934 S += II->getName(); 3935 if (ClassTemplateSpecializationDecl *Spec 3936 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 3937 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 3938 std::string TemplateArgsStr 3939 = TemplateSpecializationType::PrintTemplateArgumentList( 3940 TemplateArgs.data(), 3941 TemplateArgs.size(), 3942 (*this).PrintingPolicy); 3943 3944 S += TemplateArgsStr; 3945 } 3946 } else { 3947 S += '?'; 3948 } 3949 if (ExpandStructures) { 3950 S += '='; 3951 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3952 FieldEnd = RDecl->field_end(); 3953 Field != FieldEnd; ++Field) { 3954 if (FD) { 3955 S += '"'; 3956 S += Field->getNameAsString(); 3957 S += '"'; 3958 } 3959 3960 // Special case bit-fields. 3961 if (Field->isBitField()) { 3962 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3963 (*Field)); 3964 } else { 3965 QualType qt = Field->getType(); 3966 getLegacyIntegralTypeEncoding(qt); 3967 getObjCEncodingForTypeImpl(qt, S, false, true, 3968 FD); 3969 } 3970 } 3971 } 3972 S += RDecl->isUnion() ? ')' : '}'; 3973 return; 3974 } 3975 3976 if (T->isEnumeralType()) { 3977 if (FD && FD->isBitField()) 3978 EncodeBitField(this, S, T, FD); 3979 else 3980 S += 'i'; 3981 return; 3982 } 3983 3984 if (T->isBlockPointerType()) { 3985 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3986 return; 3987 } 3988 3989 // Ignore protocol qualifiers when mangling at this level. 3990 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 3991 T = OT->getBaseType(); 3992 3993 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3994 // @encode(class_name) 3995 ObjCInterfaceDecl *OI = OIT->getDecl(); 3996 S += '{'; 3997 const IdentifierInfo *II = OI->getIdentifier(); 3998 S += II->getName(); 3999 S += '='; 4000 llvm::SmallVector<ObjCIvarDecl*, 32> Ivars; 4001 DeepCollectObjCIvars(OI, true, Ivars); 4002 for (unsigned i = 0, e = Ivars.size(); i != e; ++i) { 4003 FieldDecl *Field = cast<FieldDecl>(Ivars[i]); 4004 if (Field->isBitField()) 4005 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, Field); 4006 else 4007 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, FD); 4008 } 4009 S += '}'; 4010 return; 4011 } 4012 4013 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 4014 if (OPT->isObjCIdType()) { 4015 S += '@'; 4016 return; 4017 } 4018 4019 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 4020 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 4021 // Since this is a binary compatibility issue, need to consult with runtime 4022 // folks. Fortunately, this is a *very* obsure construct. 4023 S += '#'; 4024 return; 4025 } 4026 4027 if (OPT->isObjCQualifiedIdType()) { 4028 getObjCEncodingForTypeImpl(getObjCIdType(), S, 4029 ExpandPointedToStructures, 4030 ExpandStructures, FD); 4031 if (FD || EncodingProperty) { 4032 // Note that we do extended encoding of protocol qualifer list 4033 // Only when doing ivar or property encoding. 4034 S += '"'; 4035 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4036 E = OPT->qual_end(); I != E; ++I) { 4037 S += '<'; 4038 S += (*I)->getNameAsString(); 4039 S += '>'; 4040 } 4041 S += '"'; 4042 } 4043 return; 4044 } 4045 4046 QualType PointeeTy = OPT->getPointeeType(); 4047 if (!EncodingProperty && 4048 isa<TypedefType>(PointeeTy.getTypePtr())) { 4049 // Another historical/compatibility reason. 4050 // We encode the underlying type which comes out as 4051 // {...}; 4052 S += '^'; 4053 getObjCEncodingForTypeImpl(PointeeTy, S, 4054 false, ExpandPointedToStructures, 4055 NULL); 4056 return; 4057 } 4058 4059 S += '@'; 4060 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 4061 S += '"'; 4062 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 4063 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4064 E = OPT->qual_end(); I != E; ++I) { 4065 S += '<'; 4066 S += (*I)->getNameAsString(); 4067 S += '>'; 4068 } 4069 S += '"'; 4070 } 4071 return; 4072 } 4073 4074 // gcc just blithely ignores member pointers. 4075 // TODO: maybe there should be a mangling for these 4076 if (T->getAs<MemberPointerType>()) 4077 return; 4078 4079 if (T->isVectorType()) { 4080 // This matches gcc's encoding, even though technically it is 4081 // insufficient. 4082 // FIXME. We should do a better job than gcc. 4083 return; 4084 } 4085 4086 assert(0 && "@encode for type not implemented!"); 4087} 4088 4089void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 4090 std::string& S) const { 4091 if (QT & Decl::OBJC_TQ_In) 4092 S += 'n'; 4093 if (QT & Decl::OBJC_TQ_Inout) 4094 S += 'N'; 4095 if (QT & Decl::OBJC_TQ_Out) 4096 S += 'o'; 4097 if (QT & Decl::OBJC_TQ_Bycopy) 4098 S += 'O'; 4099 if (QT & Decl::OBJC_TQ_Byref) 4100 S += 'R'; 4101 if (QT & Decl::OBJC_TQ_Oneway) 4102 S += 'V'; 4103} 4104 4105void ASTContext::setBuiltinVaListType(QualType T) { 4106 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 4107 4108 BuiltinVaListType = T; 4109} 4110 4111void ASTContext::setObjCIdType(QualType T) { 4112 ObjCIdTypedefType = T; 4113} 4114 4115void ASTContext::setObjCSelType(QualType T) { 4116 ObjCSelTypedefType = T; 4117} 4118 4119void ASTContext::setObjCProtoType(QualType QT) { 4120 ObjCProtoType = QT; 4121} 4122 4123void ASTContext::setObjCClassType(QualType T) { 4124 ObjCClassTypedefType = T; 4125} 4126 4127void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 4128 assert(ObjCConstantStringType.isNull() && 4129 "'NSConstantString' type already set!"); 4130 4131 ObjCConstantStringType = getObjCInterfaceType(Decl); 4132} 4133 4134/// \brief Retrieve the template name that corresponds to a non-empty 4135/// lookup. 4136TemplateName ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 4137 UnresolvedSetIterator End) { 4138 unsigned size = End - Begin; 4139 assert(size > 1 && "set is not overloaded!"); 4140 4141 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 4142 size * sizeof(FunctionTemplateDecl*)); 4143 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 4144 4145 NamedDecl **Storage = OT->getStorage(); 4146 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 4147 NamedDecl *D = *I; 4148 assert(isa<FunctionTemplateDecl>(D) || 4149 (isa<UsingShadowDecl>(D) && 4150 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 4151 *Storage++ = D; 4152 } 4153 4154 return TemplateName(OT); 4155} 4156 4157/// \brief Retrieve the template name that represents a qualified 4158/// template name such as \c std::vector. 4159TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 4160 bool TemplateKeyword, 4161 TemplateDecl *Template) { 4162 // FIXME: Canonicalization? 4163 llvm::FoldingSetNodeID ID; 4164 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 4165 4166 void *InsertPos = 0; 4167 QualifiedTemplateName *QTN = 4168 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4169 if (!QTN) { 4170 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 4171 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 4172 } 4173 4174 return TemplateName(QTN); 4175} 4176 4177/// \brief Retrieve the template name that represents a dependent 4178/// template name such as \c MetaFun::template apply. 4179TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4180 const IdentifierInfo *Name) { 4181 assert((!NNS || NNS->isDependent()) && 4182 "Nested name specifier must be dependent"); 4183 4184 llvm::FoldingSetNodeID ID; 4185 DependentTemplateName::Profile(ID, NNS, Name); 4186 4187 void *InsertPos = 0; 4188 DependentTemplateName *QTN = 4189 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4190 4191 if (QTN) 4192 return TemplateName(QTN); 4193 4194 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4195 if (CanonNNS == NNS) { 4196 QTN = new (*this,4) DependentTemplateName(NNS, Name); 4197 } else { 4198 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 4199 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 4200 DependentTemplateName *CheckQTN = 4201 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4202 assert(!CheckQTN && "Dependent type name canonicalization broken"); 4203 (void)CheckQTN; 4204 } 4205 4206 DependentTemplateNames.InsertNode(QTN, InsertPos); 4207 return TemplateName(QTN); 4208} 4209 4210/// \brief Retrieve the template name that represents a dependent 4211/// template name such as \c MetaFun::template operator+. 4212TemplateName 4213ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4214 OverloadedOperatorKind Operator) { 4215 assert((!NNS || NNS->isDependent()) && 4216 "Nested name specifier must be dependent"); 4217 4218 llvm::FoldingSetNodeID ID; 4219 DependentTemplateName::Profile(ID, NNS, Operator); 4220 4221 void *InsertPos = 0; 4222 DependentTemplateName *QTN 4223 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4224 4225 if (QTN) 4226 return TemplateName(QTN); 4227 4228 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4229 if (CanonNNS == NNS) { 4230 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 4231 } else { 4232 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 4233 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 4234 4235 DependentTemplateName *CheckQTN 4236 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4237 assert(!CheckQTN && "Dependent template name canonicalization broken"); 4238 (void)CheckQTN; 4239 } 4240 4241 DependentTemplateNames.InsertNode(QTN, InsertPos); 4242 return TemplateName(QTN); 4243} 4244 4245/// getFromTargetType - Given one of the integer types provided by 4246/// TargetInfo, produce the corresponding type. The unsigned @p Type 4247/// is actually a value of type @c TargetInfo::IntType. 4248CanQualType ASTContext::getFromTargetType(unsigned Type) const { 4249 switch (Type) { 4250 case TargetInfo::NoInt: return CanQualType(); 4251 case TargetInfo::SignedShort: return ShortTy; 4252 case TargetInfo::UnsignedShort: return UnsignedShortTy; 4253 case TargetInfo::SignedInt: return IntTy; 4254 case TargetInfo::UnsignedInt: return UnsignedIntTy; 4255 case TargetInfo::SignedLong: return LongTy; 4256 case TargetInfo::UnsignedLong: return UnsignedLongTy; 4257 case TargetInfo::SignedLongLong: return LongLongTy; 4258 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 4259 } 4260 4261 assert(false && "Unhandled TargetInfo::IntType value"); 4262 return CanQualType(); 4263} 4264 4265//===----------------------------------------------------------------------===// 4266// Type Predicates. 4267//===----------------------------------------------------------------------===// 4268 4269/// isObjCNSObjectType - Return true if this is an NSObject object using 4270/// NSObject attribute on a c-style pointer type. 4271/// FIXME - Make it work directly on types. 4272/// FIXME: Move to Type. 4273/// 4274bool ASTContext::isObjCNSObjectType(QualType Ty) const { 4275 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 4276 if (TypedefDecl *TD = TDT->getDecl()) 4277 if (TD->getAttr<ObjCNSObjectAttr>()) 4278 return true; 4279 } 4280 return false; 4281} 4282 4283/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 4284/// garbage collection attribute. 4285/// 4286Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 4287 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 4288 if (getLangOptions().ObjC1 && 4289 getLangOptions().getGCMode() != LangOptions::NonGC) { 4290 GCAttrs = Ty.getObjCGCAttr(); 4291 // Default behavious under objective-c's gc is for objective-c pointers 4292 // (or pointers to them) be treated as though they were declared 4293 // as __strong. 4294 if (GCAttrs == Qualifiers::GCNone) { 4295 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 4296 GCAttrs = Qualifiers::Strong; 4297 else if (Ty->isPointerType()) 4298 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 4299 } 4300 // Non-pointers have none gc'able attribute regardless of the attribute 4301 // set on them. 4302 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 4303 return Qualifiers::GCNone; 4304 } 4305 return GCAttrs; 4306} 4307 4308//===----------------------------------------------------------------------===// 4309// Type Compatibility Testing 4310//===----------------------------------------------------------------------===// 4311 4312/// areCompatVectorTypes - Return true if the two specified vector types are 4313/// compatible. 4314static bool areCompatVectorTypes(const VectorType *LHS, 4315 const VectorType *RHS) { 4316 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 4317 return LHS->getElementType() == RHS->getElementType() && 4318 LHS->getNumElements() == RHS->getNumElements(); 4319} 4320 4321bool ASTContext::areCompatibleVectorTypes(QualType FirstVec, 4322 QualType SecondVec) { 4323 assert(FirstVec->isVectorType() && "FirstVec should be a vector type"); 4324 assert(SecondVec->isVectorType() && "SecondVec should be a vector type"); 4325 4326 if (hasSameUnqualifiedType(FirstVec, SecondVec)) 4327 return true; 4328 4329 // Treat Neon vector types and most AltiVec vector types as if they are the 4330 // equivalent GCC vector types. 4331 const VectorType *First = FirstVec->getAs<VectorType>(); 4332 const VectorType *Second = SecondVec->getAs<VectorType>(); 4333 if (First->getNumElements() == Second->getNumElements() && 4334 hasSameType(First->getElementType(), Second->getElementType()) && 4335 First->getVectorKind() != VectorType::AltiVecPixel && 4336 First->getVectorKind() != VectorType::AltiVecBool && 4337 Second->getVectorKind() != VectorType::AltiVecPixel && 4338 Second->getVectorKind() != VectorType::AltiVecBool) 4339 return true; 4340 4341 return false; 4342} 4343 4344//===----------------------------------------------------------------------===// 4345// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 4346//===----------------------------------------------------------------------===// 4347 4348/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 4349/// inheritance hierarchy of 'rProto'. 4350bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 4351 ObjCProtocolDecl *rProto) { 4352 if (lProto == rProto) 4353 return true; 4354 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 4355 E = rProto->protocol_end(); PI != E; ++PI) 4356 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 4357 return true; 4358 return false; 4359} 4360 4361/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 4362/// return true if lhs's protocols conform to rhs's protocol; false 4363/// otherwise. 4364bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 4365 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 4366 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 4367 return false; 4368} 4369 4370/// ObjCQualifiedClassTypesAreCompatible - compare Class<p,...> and 4371/// Class<p1, ...>. 4372bool ASTContext::ObjCQualifiedClassTypesAreCompatible(QualType lhs, 4373 QualType rhs) { 4374 const ObjCObjectPointerType *lhsQID = lhs->getAs<ObjCObjectPointerType>(); 4375 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4376 assert ((lhsQID && rhsOPT) && "ObjCQualifiedClassTypesAreCompatible"); 4377 4378 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4379 E = lhsQID->qual_end(); I != E; ++I) { 4380 bool match = false; 4381 ObjCProtocolDecl *lhsProto = *I; 4382 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4383 E = rhsOPT->qual_end(); J != E; ++J) { 4384 ObjCProtocolDecl *rhsProto = *J; 4385 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto)) { 4386 match = true; 4387 break; 4388 } 4389 } 4390 if (!match) 4391 return false; 4392 } 4393 return true; 4394} 4395 4396/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 4397/// ObjCQualifiedIDType. 4398bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4399 bool compare) { 4400 // Allow id<P..> and an 'id' or void* type in all cases. 4401 if (lhs->isVoidPointerType() || 4402 lhs->isObjCIdType() || lhs->isObjCClassType()) 4403 return true; 4404 else if (rhs->isVoidPointerType() || 4405 rhs->isObjCIdType() || rhs->isObjCClassType()) 4406 return true; 4407 4408 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4409 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4410 4411 if (!rhsOPT) return false; 4412 4413 if (rhsOPT->qual_empty()) { 4414 // If the RHS is a unqualified interface pointer "NSString*", 4415 // make sure we check the class hierarchy. 4416 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4417 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4418 E = lhsQID->qual_end(); I != E; ++I) { 4419 // when comparing an id<P> on lhs with a static type on rhs, 4420 // see if static class implements all of id's protocols, directly or 4421 // through its super class and categories. 4422 if (!rhsID->ClassImplementsProtocol(*I, true)) 4423 return false; 4424 } 4425 } 4426 // If there are no qualifiers and no interface, we have an 'id'. 4427 return true; 4428 } 4429 // Both the right and left sides have qualifiers. 4430 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4431 E = lhsQID->qual_end(); I != E; ++I) { 4432 ObjCProtocolDecl *lhsProto = *I; 4433 bool match = false; 4434 4435 // when comparing an id<P> on lhs with a static type on rhs, 4436 // see if static class implements all of id's protocols, directly or 4437 // through its super class and categories. 4438 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4439 E = rhsOPT->qual_end(); J != E; ++J) { 4440 ObjCProtocolDecl *rhsProto = *J; 4441 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4442 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4443 match = true; 4444 break; 4445 } 4446 } 4447 // If the RHS is a qualified interface pointer "NSString<P>*", 4448 // make sure we check the class hierarchy. 4449 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4450 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4451 E = lhsQID->qual_end(); I != E; ++I) { 4452 // when comparing an id<P> on lhs with a static type on rhs, 4453 // see if static class implements all of id's protocols, directly or 4454 // through its super class and categories. 4455 if (rhsID->ClassImplementsProtocol(*I, true)) { 4456 match = true; 4457 break; 4458 } 4459 } 4460 } 4461 if (!match) 4462 return false; 4463 } 4464 4465 return true; 4466 } 4467 4468 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4469 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4470 4471 if (const ObjCObjectPointerType *lhsOPT = 4472 lhs->getAsObjCInterfacePointerType()) { 4473 // If both the right and left sides have qualifiers. 4474 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4475 E = lhsOPT->qual_end(); I != E; ++I) { 4476 ObjCProtocolDecl *lhsProto = *I; 4477 bool match = false; 4478 4479 // when comparing an id<P> on rhs with a static type on lhs, 4480 // see if static class implements all of id's protocols, directly or 4481 // through its super class and categories. 4482 // First, lhs protocols in the qualifier list must be found, direct 4483 // or indirect in rhs's qualifier list or it is a mismatch. 4484 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4485 E = rhsQID->qual_end(); J != E; ++J) { 4486 ObjCProtocolDecl *rhsProto = *J; 4487 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4488 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4489 match = true; 4490 break; 4491 } 4492 } 4493 if (!match) 4494 return false; 4495 } 4496 4497 // Static class's protocols, or its super class or category protocols 4498 // must be found, direct or indirect in rhs's qualifier list or it is a mismatch. 4499 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4500 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4501 CollectInheritedProtocols(lhsID, LHSInheritedProtocols); 4502 // This is rather dubious but matches gcc's behavior. If lhs has 4503 // no type qualifier and its class has no static protocol(s) 4504 // assume that it is mismatch. 4505 if (LHSInheritedProtocols.empty() && lhsOPT->qual_empty()) 4506 return false; 4507 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4508 LHSInheritedProtocols.begin(), 4509 E = LHSInheritedProtocols.end(); I != E; ++I) { 4510 bool match = false; 4511 ObjCProtocolDecl *lhsProto = (*I); 4512 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4513 E = rhsQID->qual_end(); J != E; ++J) { 4514 ObjCProtocolDecl *rhsProto = *J; 4515 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4516 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4517 match = true; 4518 break; 4519 } 4520 } 4521 if (!match) 4522 return false; 4523 } 4524 } 4525 return true; 4526 } 4527 return false; 4528} 4529 4530/// canAssignObjCInterfaces - Return true if the two interface types are 4531/// compatible for assignment from RHS to LHS. This handles validation of any 4532/// protocol qualifiers on the LHS or RHS. 4533/// 4534bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4535 const ObjCObjectPointerType *RHSOPT) { 4536 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4537 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4538 4539 // If either type represents the built-in 'id' or 'Class' types, return true. 4540 if (LHS->isObjCUnqualifiedIdOrClass() || 4541 RHS->isObjCUnqualifiedIdOrClass()) 4542 return true; 4543 4544 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 4545 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4546 QualType(RHSOPT,0), 4547 false); 4548 4549 if (LHS->isObjCQualifiedClass() && RHS->isObjCQualifiedClass()) 4550 return ObjCQualifiedClassTypesAreCompatible(QualType(LHSOPT,0), 4551 QualType(RHSOPT,0)); 4552 4553 // If we have 2 user-defined types, fall into that path. 4554 if (LHS->getInterface() && RHS->getInterface()) 4555 return canAssignObjCInterfaces(LHS, RHS); 4556 4557 return false; 4558} 4559 4560/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4561/// for providing type-safty for objective-c pointers used to pass/return 4562/// arguments in block literals. When passed as arguments, passing 'A*' where 4563/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4564/// not OK. For the return type, the opposite is not OK. 4565bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4566 const ObjCObjectPointerType *LHSOPT, 4567 const ObjCObjectPointerType *RHSOPT) { 4568 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4569 return true; 4570 4571 if (LHSOPT->isObjCBuiltinType()) { 4572 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4573 } 4574 4575 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4576 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4577 QualType(RHSOPT,0), 4578 false); 4579 4580 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4581 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4582 if (LHS && RHS) { // We have 2 user-defined types. 4583 if (LHS != RHS) { 4584 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4585 return false; 4586 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4587 return true; 4588 } 4589 else 4590 return true; 4591 } 4592 return false; 4593} 4594 4595/// getIntersectionOfProtocols - This routine finds the intersection of set 4596/// of protocols inherited from two distinct objective-c pointer objects. 4597/// It is used to build composite qualifier list of the composite type of 4598/// the conditional expression involving two objective-c pointer objects. 4599static 4600void getIntersectionOfProtocols(ASTContext &Context, 4601 const ObjCObjectPointerType *LHSOPT, 4602 const ObjCObjectPointerType *RHSOPT, 4603 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4604 4605 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4606 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4607 assert(LHS->getInterface() && "LHS must have an interface base"); 4608 assert(RHS->getInterface() && "RHS must have an interface base"); 4609 4610 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4611 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4612 if (LHSNumProtocols > 0) 4613 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4614 else { 4615 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4616 Context.CollectInheritedProtocols(LHS->getInterface(), 4617 LHSInheritedProtocols); 4618 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4619 LHSInheritedProtocols.end()); 4620 } 4621 4622 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4623 if (RHSNumProtocols > 0) { 4624 ObjCProtocolDecl **RHSProtocols = 4625 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4626 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4627 if (InheritedProtocolSet.count(RHSProtocols[i])) 4628 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4629 } 4630 else { 4631 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4632 Context.CollectInheritedProtocols(RHS->getInterface(), 4633 RHSInheritedProtocols); 4634 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4635 RHSInheritedProtocols.begin(), 4636 E = RHSInheritedProtocols.end(); I != E; ++I) 4637 if (InheritedProtocolSet.count((*I))) 4638 IntersectionOfProtocols.push_back((*I)); 4639 } 4640} 4641 4642/// areCommonBaseCompatible - Returns common base class of the two classes if 4643/// one found. Note that this is O'2 algorithm. But it will be called as the 4644/// last type comparison in a ?-exp of ObjC pointer types before a 4645/// warning is issued. So, its invokation is extremely rare. 4646QualType ASTContext::areCommonBaseCompatible( 4647 const ObjCObjectPointerType *Lptr, 4648 const ObjCObjectPointerType *Rptr) { 4649 const ObjCObjectType *LHS = Lptr->getObjectType(); 4650 const ObjCObjectType *RHS = Rptr->getObjectType(); 4651 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 4652 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 4653 if (!LDecl || !RDecl) 4654 return QualType(); 4655 4656 while ((LDecl = LDecl->getSuperClass())) { 4657 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 4658 if (canAssignObjCInterfaces(LHS, RHS)) { 4659 llvm::SmallVector<ObjCProtocolDecl *, 8> Protocols; 4660 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 4661 4662 QualType Result = QualType(LHS, 0); 4663 if (!Protocols.empty()) 4664 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 4665 Result = getObjCObjectPointerType(Result); 4666 return Result; 4667 } 4668 } 4669 4670 return QualType(); 4671} 4672 4673bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 4674 const ObjCObjectType *RHS) { 4675 assert(LHS->getInterface() && "LHS is not an interface type"); 4676 assert(RHS->getInterface() && "RHS is not an interface type"); 4677 4678 // Verify that the base decls are compatible: the RHS must be a subclass of 4679 // the LHS. 4680 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 4681 return false; 4682 4683 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4684 // protocol qualified at all, then we are good. 4685 if (LHS->getNumProtocols() == 0) 4686 return true; 4687 4688 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4689 // isn't a superset. 4690 if (RHS->getNumProtocols() == 0) 4691 return true; // FIXME: should return false! 4692 4693 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 4694 LHSPE = LHS->qual_end(); 4695 LHSPI != LHSPE; LHSPI++) { 4696 bool RHSImplementsProtocol = false; 4697 4698 // If the RHS doesn't implement the protocol on the left, the types 4699 // are incompatible. 4700 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 4701 RHSPE = RHS->qual_end(); 4702 RHSPI != RHSPE; RHSPI++) { 4703 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4704 RHSImplementsProtocol = true; 4705 break; 4706 } 4707 } 4708 // FIXME: For better diagnostics, consider passing back the protocol name. 4709 if (!RHSImplementsProtocol) 4710 return false; 4711 } 4712 // The RHS implements all protocols listed on the LHS. 4713 return true; 4714} 4715 4716bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4717 // get the "pointed to" types 4718 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4719 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4720 4721 if (!LHSOPT || !RHSOPT) 4722 return false; 4723 4724 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4725 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4726} 4727 4728bool ASTContext::canBindObjCObjectType(QualType To, QualType From) { 4729 return canAssignObjCInterfaces( 4730 getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(), 4731 getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>()); 4732} 4733 4734/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4735/// both shall have the identically qualified version of a compatible type. 4736/// C99 6.2.7p1: Two types have compatible types if their types are the 4737/// same. See 6.7.[2,3,5] for additional rules. 4738bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS, 4739 bool CompareUnqualified) { 4740 if (getLangOptions().CPlusPlus) 4741 return hasSameType(LHS, RHS); 4742 4743 return !mergeTypes(LHS, RHS, false, CompareUnqualified).isNull(); 4744} 4745 4746bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 4747 return !mergeTypes(LHS, RHS, true).isNull(); 4748} 4749 4750/// mergeTransparentUnionType - if T is a transparent union type and a member 4751/// of T is compatible with SubType, return the merged type, else return 4752/// QualType() 4753QualType ASTContext::mergeTransparentUnionType(QualType T, QualType SubType, 4754 bool OfBlockPointer, 4755 bool Unqualified) { 4756 if (const RecordType *UT = T->getAsUnionType()) { 4757 RecordDecl *UD = UT->getDecl(); 4758 if (UD->hasAttr<TransparentUnionAttr>()) { 4759 for (RecordDecl::field_iterator it = UD->field_begin(), 4760 itend = UD->field_end(); it != itend; ++it) { 4761 QualType ET = it->getType().getUnqualifiedType(); 4762 QualType MT = mergeTypes(ET, SubType, OfBlockPointer, Unqualified); 4763 if (!MT.isNull()) 4764 return MT; 4765 } 4766 } 4767 } 4768 4769 return QualType(); 4770} 4771 4772/// mergeFunctionArgumentTypes - merge two types which appear as function 4773/// argument types 4774QualType ASTContext::mergeFunctionArgumentTypes(QualType lhs, QualType rhs, 4775 bool OfBlockPointer, 4776 bool Unqualified) { 4777 // GNU extension: two types are compatible if they appear as a function 4778 // argument, one of the types is a transparent union type and the other 4779 // type is compatible with a union member 4780 QualType lmerge = mergeTransparentUnionType(lhs, rhs, OfBlockPointer, 4781 Unqualified); 4782 if (!lmerge.isNull()) 4783 return lmerge; 4784 4785 QualType rmerge = mergeTransparentUnionType(rhs, lhs, OfBlockPointer, 4786 Unqualified); 4787 if (!rmerge.isNull()) 4788 return rmerge; 4789 4790 return mergeTypes(lhs, rhs, OfBlockPointer, Unqualified); 4791} 4792 4793QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 4794 bool OfBlockPointer, 4795 bool Unqualified) { 4796 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4797 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4798 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4799 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4800 bool allLTypes = true; 4801 bool allRTypes = true; 4802 4803 // Check return type 4804 QualType retType; 4805 if (OfBlockPointer) 4806 retType = mergeTypes(rbase->getResultType(), lbase->getResultType(), true, 4807 Unqualified); 4808 else 4809 retType = mergeTypes(lbase->getResultType(), rbase->getResultType(), 4810 false, Unqualified); 4811 if (retType.isNull()) return QualType(); 4812 4813 if (Unqualified) 4814 retType = retType.getUnqualifiedType(); 4815 4816 CanQualType LRetType = getCanonicalType(lbase->getResultType()); 4817 CanQualType RRetType = getCanonicalType(rbase->getResultType()); 4818 if (Unqualified) { 4819 LRetType = LRetType.getUnqualifiedType(); 4820 RRetType = RRetType.getUnqualifiedType(); 4821 } 4822 4823 if (getCanonicalType(retType) != LRetType) 4824 allLTypes = false; 4825 if (getCanonicalType(retType) != RRetType) 4826 allRTypes = false; 4827 // FIXME: double check this 4828 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 4829 // rbase->getRegParmAttr() != 0 && 4830 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 4831 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 4832 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 4833 unsigned RegParm = lbaseInfo.getRegParm() == 0 ? rbaseInfo.getRegParm() : 4834 lbaseInfo.getRegParm(); 4835 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 4836 if (NoReturn != lbaseInfo.getNoReturn() || 4837 RegParm != lbaseInfo.getRegParm()) 4838 allLTypes = false; 4839 if (NoReturn != rbaseInfo.getNoReturn() || 4840 RegParm != rbaseInfo.getRegParm()) 4841 allRTypes = false; 4842 CallingConv lcc = lbaseInfo.getCC(); 4843 CallingConv rcc = rbaseInfo.getCC(); 4844 // Compatible functions must have compatible calling conventions 4845 if (!isSameCallConv(lcc, rcc)) 4846 return QualType(); 4847 4848 FunctionType::ExtInfo einfo = FunctionType::ExtInfo(NoReturn, RegParm, lcc); 4849 4850 if (lproto && rproto) { // two C99 style function prototypes 4851 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4852 "C++ shouldn't be here"); 4853 unsigned lproto_nargs = lproto->getNumArgs(); 4854 unsigned rproto_nargs = rproto->getNumArgs(); 4855 4856 // Compatible functions must have the same number of arguments 4857 if (lproto_nargs != rproto_nargs) 4858 return QualType(); 4859 4860 // Variadic and non-variadic functions aren't compatible 4861 if (lproto->isVariadic() != rproto->isVariadic()) 4862 return QualType(); 4863 4864 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4865 return QualType(); 4866 4867 // Check argument compatibility 4868 llvm::SmallVector<QualType, 10> types; 4869 for (unsigned i = 0; i < lproto_nargs; i++) { 4870 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4871 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4872 QualType argtype = mergeFunctionArgumentTypes(largtype, rargtype, 4873 OfBlockPointer, 4874 Unqualified); 4875 if (argtype.isNull()) return QualType(); 4876 4877 if (Unqualified) 4878 argtype = argtype.getUnqualifiedType(); 4879 4880 types.push_back(argtype); 4881 if (Unqualified) { 4882 largtype = largtype.getUnqualifiedType(); 4883 rargtype = rargtype.getUnqualifiedType(); 4884 } 4885 4886 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4887 allLTypes = false; 4888 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4889 allRTypes = false; 4890 } 4891 if (allLTypes) return lhs; 4892 if (allRTypes) return rhs; 4893 4894 FunctionProtoType::ExtProtoInfo EPI = lproto->getExtProtoInfo(); 4895 EPI.ExtInfo = einfo; 4896 return getFunctionType(retType, types.begin(), types.size(), EPI); 4897 } 4898 4899 if (lproto) allRTypes = false; 4900 if (rproto) allLTypes = false; 4901 4902 const FunctionProtoType *proto = lproto ? lproto : rproto; 4903 if (proto) { 4904 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4905 if (proto->isVariadic()) return QualType(); 4906 // Check that the types are compatible with the types that 4907 // would result from default argument promotions (C99 6.7.5.3p15). 4908 // The only types actually affected are promotable integer 4909 // types and floats, which would be passed as a different 4910 // type depending on whether the prototype is visible. 4911 unsigned proto_nargs = proto->getNumArgs(); 4912 for (unsigned i = 0; i < proto_nargs; ++i) { 4913 QualType argTy = proto->getArgType(i); 4914 4915 // Look at the promotion type of enum types, since that is the type used 4916 // to pass enum values. 4917 if (const EnumType *Enum = argTy->getAs<EnumType>()) 4918 argTy = Enum->getDecl()->getPromotionType(); 4919 4920 if (argTy->isPromotableIntegerType() || 4921 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4922 return QualType(); 4923 } 4924 4925 if (allLTypes) return lhs; 4926 if (allRTypes) return rhs; 4927 4928 FunctionProtoType::ExtProtoInfo EPI = proto->getExtProtoInfo(); 4929 EPI.ExtInfo = einfo; 4930 return getFunctionType(retType, proto->arg_type_begin(), 4931 proto->getNumArgs(), EPI); 4932 } 4933 4934 if (allLTypes) return lhs; 4935 if (allRTypes) return rhs; 4936 FunctionType::ExtInfo Info(NoReturn, RegParm, lcc); 4937 return getFunctionNoProtoType(retType, Info); 4938} 4939 4940QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 4941 bool OfBlockPointer, 4942 bool Unqualified) { 4943 // C++ [expr]: If an expression initially has the type "reference to T", the 4944 // type is adjusted to "T" prior to any further analysis, the expression 4945 // designates the object or function denoted by the reference, and the 4946 // expression is an lvalue unless the reference is an rvalue reference and 4947 // the expression is a function call (possibly inside parentheses). 4948 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 4949 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 4950 4951 if (Unqualified) { 4952 LHS = LHS.getUnqualifiedType(); 4953 RHS = RHS.getUnqualifiedType(); 4954 } 4955 4956 QualType LHSCan = getCanonicalType(LHS), 4957 RHSCan = getCanonicalType(RHS); 4958 4959 // If two types are identical, they are compatible. 4960 if (LHSCan == RHSCan) 4961 return LHS; 4962 4963 // If the qualifiers are different, the types aren't compatible... mostly. 4964 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4965 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4966 if (LQuals != RQuals) { 4967 // If any of these qualifiers are different, we have a type 4968 // mismatch. 4969 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4970 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4971 return QualType(); 4972 4973 // Exactly one GC qualifier difference is allowed: __strong is 4974 // okay if the other type has no GC qualifier but is an Objective 4975 // C object pointer (i.e. implicitly strong by default). We fix 4976 // this by pretending that the unqualified type was actually 4977 // qualified __strong. 4978 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4979 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4980 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4981 4982 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4983 return QualType(); 4984 4985 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4986 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4987 } 4988 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4989 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4990 } 4991 return QualType(); 4992 } 4993 4994 // Okay, qualifiers are equal. 4995 4996 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4997 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4998 4999 // We want to consider the two function types to be the same for these 5000 // comparisons, just force one to the other. 5001 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 5002 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 5003 5004 // Same as above for arrays 5005 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 5006 LHSClass = Type::ConstantArray; 5007 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 5008 RHSClass = Type::ConstantArray; 5009 5010 // ObjCInterfaces are just specialized ObjCObjects. 5011 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 5012 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 5013 5014 // Canonicalize ExtVector -> Vector. 5015 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 5016 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 5017 5018 // If the canonical type classes don't match. 5019 if (LHSClass != RHSClass) { 5020 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 5021 // a signed integer type, or an unsigned integer type. 5022 // Compatibility is based on the underlying type, not the promotion 5023 // type. 5024 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 5025 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 5026 return RHS; 5027 } 5028 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 5029 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 5030 return LHS; 5031 } 5032 5033 return QualType(); 5034 } 5035 5036 // The canonical type classes match. 5037 switch (LHSClass) { 5038#define TYPE(Class, Base) 5039#define ABSTRACT_TYPE(Class, Base) 5040#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 5041#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 5042#define DEPENDENT_TYPE(Class, Base) case Type::Class: 5043#include "clang/AST/TypeNodes.def" 5044 assert(false && "Non-canonical and dependent types shouldn't get here"); 5045 return QualType(); 5046 5047 case Type::LValueReference: 5048 case Type::RValueReference: 5049 case Type::MemberPointer: 5050 assert(false && "C++ should never be in mergeTypes"); 5051 return QualType(); 5052 5053 case Type::ObjCInterface: 5054 case Type::IncompleteArray: 5055 case Type::VariableArray: 5056 case Type::FunctionProto: 5057 case Type::ExtVector: 5058 assert(false && "Types are eliminated above"); 5059 return QualType(); 5060 5061 case Type::Pointer: 5062 { 5063 // Merge two pointer types, while trying to preserve typedef info 5064 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 5065 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 5066 if (Unqualified) { 5067 LHSPointee = LHSPointee.getUnqualifiedType(); 5068 RHSPointee = RHSPointee.getUnqualifiedType(); 5069 } 5070 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, false, 5071 Unqualified); 5072 if (ResultType.isNull()) return QualType(); 5073 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5074 return LHS; 5075 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5076 return RHS; 5077 return getPointerType(ResultType); 5078 } 5079 case Type::BlockPointer: 5080 { 5081 // Merge two block pointer types, while trying to preserve typedef info 5082 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 5083 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 5084 if (Unqualified) { 5085 LHSPointee = LHSPointee.getUnqualifiedType(); 5086 RHSPointee = RHSPointee.getUnqualifiedType(); 5087 } 5088 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer, 5089 Unqualified); 5090 if (ResultType.isNull()) return QualType(); 5091 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5092 return LHS; 5093 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5094 return RHS; 5095 return getBlockPointerType(ResultType); 5096 } 5097 case Type::ConstantArray: 5098 { 5099 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 5100 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 5101 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 5102 return QualType(); 5103 5104 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 5105 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 5106 if (Unqualified) { 5107 LHSElem = LHSElem.getUnqualifiedType(); 5108 RHSElem = RHSElem.getUnqualifiedType(); 5109 } 5110 5111 QualType ResultType = mergeTypes(LHSElem, RHSElem, false, Unqualified); 5112 if (ResultType.isNull()) return QualType(); 5113 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5114 return LHS; 5115 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5116 return RHS; 5117 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 5118 ArrayType::ArraySizeModifier(), 0); 5119 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 5120 ArrayType::ArraySizeModifier(), 0); 5121 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 5122 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 5123 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5124 return LHS; 5125 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5126 return RHS; 5127 if (LVAT) { 5128 // FIXME: This isn't correct! But tricky to implement because 5129 // the array's size has to be the size of LHS, but the type 5130 // has to be different. 5131 return LHS; 5132 } 5133 if (RVAT) { 5134 // FIXME: This isn't correct! But tricky to implement because 5135 // the array's size has to be the size of RHS, but the type 5136 // has to be different. 5137 return RHS; 5138 } 5139 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 5140 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 5141 return getIncompleteArrayType(ResultType, 5142 ArrayType::ArraySizeModifier(), 0); 5143 } 5144 case Type::FunctionNoProto: 5145 return mergeFunctionTypes(LHS, RHS, OfBlockPointer, Unqualified); 5146 case Type::Record: 5147 case Type::Enum: 5148 return QualType(); 5149 case Type::Builtin: 5150 // Only exactly equal builtin types are compatible, which is tested above. 5151 return QualType(); 5152 case Type::Complex: 5153 // Distinct complex types are incompatible. 5154 return QualType(); 5155 case Type::Vector: 5156 // FIXME: The merged type should be an ExtVector! 5157 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 5158 RHSCan->getAs<VectorType>())) 5159 return LHS; 5160 return QualType(); 5161 case Type::ObjCObject: { 5162 // Check if the types are assignment compatible. 5163 // FIXME: This should be type compatibility, e.g. whether 5164 // "LHS x; RHS x;" at global scope is legal. 5165 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 5166 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 5167 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 5168 return LHS; 5169 5170 return QualType(); 5171 } 5172 case Type::ObjCObjectPointer: { 5173 if (OfBlockPointer) { 5174 if (canAssignObjCInterfacesInBlockPointer( 5175 LHS->getAs<ObjCObjectPointerType>(), 5176 RHS->getAs<ObjCObjectPointerType>())) 5177 return LHS; 5178 return QualType(); 5179 } 5180 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 5181 RHS->getAs<ObjCObjectPointerType>())) 5182 return LHS; 5183 5184 return QualType(); 5185 } 5186 } 5187 5188 return QualType(); 5189} 5190 5191/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 5192/// 'RHS' attributes and returns the merged version; including for function 5193/// return types. 5194QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 5195 QualType LHSCan = getCanonicalType(LHS), 5196 RHSCan = getCanonicalType(RHS); 5197 // If two types are identical, they are compatible. 5198 if (LHSCan == RHSCan) 5199 return LHS; 5200 if (RHSCan->isFunctionType()) { 5201 if (!LHSCan->isFunctionType()) 5202 return QualType(); 5203 QualType OldReturnType = 5204 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 5205 QualType NewReturnType = 5206 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 5207 QualType ResReturnType = 5208 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 5209 if (ResReturnType.isNull()) 5210 return QualType(); 5211 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 5212 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 5213 // In either case, use OldReturnType to build the new function type. 5214 const FunctionType *F = LHS->getAs<FunctionType>(); 5215 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 5216 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 5217 EPI.ExtInfo = getFunctionExtInfo(LHS); 5218 QualType ResultType 5219 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 5220 FPT->getNumArgs(), EPI); 5221 return ResultType; 5222 } 5223 } 5224 return QualType(); 5225 } 5226 5227 // If the qualifiers are different, the types can still be merged. 5228 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5229 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5230 if (LQuals != RQuals) { 5231 // If any of these qualifiers are different, we have a type mismatch. 5232 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5233 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5234 return QualType(); 5235 5236 // Exactly one GC qualifier difference is allowed: __strong is 5237 // okay if the other type has no GC qualifier but is an Objective 5238 // C object pointer (i.e. implicitly strong by default). We fix 5239 // this by pretending that the unqualified type was actually 5240 // qualified __strong. 5241 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5242 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5243 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5244 5245 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5246 return QualType(); 5247 5248 if (GC_L == Qualifiers::Strong) 5249 return LHS; 5250 if (GC_R == Qualifiers::Strong) 5251 return RHS; 5252 return QualType(); 5253 } 5254 5255 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 5256 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5257 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5258 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 5259 if (ResQT == LHSBaseQT) 5260 return LHS; 5261 if (ResQT == RHSBaseQT) 5262 return RHS; 5263 } 5264 return QualType(); 5265} 5266 5267//===----------------------------------------------------------------------===// 5268// Integer Predicates 5269//===----------------------------------------------------------------------===// 5270 5271unsigned ASTContext::getIntWidth(QualType T) { 5272 if (EnumType *ET = dyn_cast<EnumType>(T)) 5273 T = ET->getDecl()->getIntegerType(); 5274 if (T->isBooleanType()) 5275 return 1; 5276 // For builtin types, just use the standard type sizing method 5277 return (unsigned)getTypeSize(T); 5278} 5279 5280QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 5281 assert(T->hasSignedIntegerRepresentation() && "Unexpected type"); 5282 5283 // Turn <4 x signed int> -> <4 x unsigned int> 5284 if (const VectorType *VTy = T->getAs<VectorType>()) 5285 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 5286 VTy->getNumElements(), VTy->getVectorKind()); 5287 5288 // For enums, we return the unsigned version of the base type. 5289 if (const EnumType *ETy = T->getAs<EnumType>()) 5290 T = ETy->getDecl()->getIntegerType(); 5291 5292 const BuiltinType *BTy = T->getAs<BuiltinType>(); 5293 assert(BTy && "Unexpected signed integer type"); 5294 switch (BTy->getKind()) { 5295 case BuiltinType::Char_S: 5296 case BuiltinType::SChar: 5297 return UnsignedCharTy; 5298 case BuiltinType::Short: 5299 return UnsignedShortTy; 5300 case BuiltinType::Int: 5301 return UnsignedIntTy; 5302 case BuiltinType::Long: 5303 return UnsignedLongTy; 5304 case BuiltinType::LongLong: 5305 return UnsignedLongLongTy; 5306 case BuiltinType::Int128: 5307 return UnsignedInt128Ty; 5308 default: 5309 assert(0 && "Unexpected signed integer type"); 5310 return QualType(); 5311 } 5312} 5313 5314ExternalASTSource::~ExternalASTSource() { } 5315 5316void ExternalASTSource::PrintStats() { } 5317 5318ASTMutationListener::~ASTMutationListener() { } 5319 5320 5321//===----------------------------------------------------------------------===// 5322// Builtin Type Computation 5323//===----------------------------------------------------------------------===// 5324 5325/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 5326/// pointer over the consumed characters. This returns the resultant type. If 5327/// AllowTypeModifiers is false then modifier like * are not parsed, just basic 5328/// types. This allows "v2i*" to be parsed as a pointer to a v2i instead of 5329/// a vector of "i*". 5330/// 5331/// RequiresICE is filled in on return to indicate whether the value is required 5332/// to be an Integer Constant Expression. 5333static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 5334 ASTContext::GetBuiltinTypeError &Error, 5335 bool &RequiresICE, 5336 bool AllowTypeModifiers) { 5337 // Modifiers. 5338 int HowLong = 0; 5339 bool Signed = false, Unsigned = false; 5340 RequiresICE = false; 5341 5342 // Read the prefixed modifiers first. 5343 bool Done = false; 5344 while (!Done) { 5345 switch (*Str++) { 5346 default: Done = true; --Str; break; 5347 case 'I': 5348 RequiresICE = true; 5349 break; 5350 case 'S': 5351 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 5352 assert(!Signed && "Can't use 'S' modifier multiple times!"); 5353 Signed = true; 5354 break; 5355 case 'U': 5356 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 5357 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 5358 Unsigned = true; 5359 break; 5360 case 'L': 5361 assert(HowLong <= 2 && "Can't have LLLL modifier"); 5362 ++HowLong; 5363 break; 5364 } 5365 } 5366 5367 QualType Type; 5368 5369 // Read the base type. 5370 switch (*Str++) { 5371 default: assert(0 && "Unknown builtin type letter!"); 5372 case 'v': 5373 assert(HowLong == 0 && !Signed && !Unsigned && 5374 "Bad modifiers used with 'v'!"); 5375 Type = Context.VoidTy; 5376 break; 5377 case 'f': 5378 assert(HowLong == 0 && !Signed && !Unsigned && 5379 "Bad modifiers used with 'f'!"); 5380 Type = Context.FloatTy; 5381 break; 5382 case 'd': 5383 assert(HowLong < 2 && !Signed && !Unsigned && 5384 "Bad modifiers used with 'd'!"); 5385 if (HowLong) 5386 Type = Context.LongDoubleTy; 5387 else 5388 Type = Context.DoubleTy; 5389 break; 5390 case 's': 5391 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 5392 if (Unsigned) 5393 Type = Context.UnsignedShortTy; 5394 else 5395 Type = Context.ShortTy; 5396 break; 5397 case 'i': 5398 if (HowLong == 3) 5399 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 5400 else if (HowLong == 2) 5401 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 5402 else if (HowLong == 1) 5403 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 5404 else 5405 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 5406 break; 5407 case 'c': 5408 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 5409 if (Signed) 5410 Type = Context.SignedCharTy; 5411 else if (Unsigned) 5412 Type = Context.UnsignedCharTy; 5413 else 5414 Type = Context.CharTy; 5415 break; 5416 case 'b': // boolean 5417 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 5418 Type = Context.BoolTy; 5419 break; 5420 case 'z': // size_t. 5421 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 5422 Type = Context.getSizeType(); 5423 break; 5424 case 'F': 5425 Type = Context.getCFConstantStringType(); 5426 break; 5427 case 'G': 5428 Type = Context.getObjCIdType(); 5429 break; 5430 case 'H': 5431 Type = Context.getObjCSelType(); 5432 break; 5433 case 'a': 5434 Type = Context.getBuiltinVaListType(); 5435 assert(!Type.isNull() && "builtin va list type not initialized!"); 5436 break; 5437 case 'A': 5438 // This is a "reference" to a va_list; however, what exactly 5439 // this means depends on how va_list is defined. There are two 5440 // different kinds of va_list: ones passed by value, and ones 5441 // passed by reference. An example of a by-value va_list is 5442 // x86, where va_list is a char*. An example of by-ref va_list 5443 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 5444 // we want this argument to be a char*&; for x86-64, we want 5445 // it to be a __va_list_tag*. 5446 Type = Context.getBuiltinVaListType(); 5447 assert(!Type.isNull() && "builtin va list type not initialized!"); 5448 if (Type->isArrayType()) 5449 Type = Context.getArrayDecayedType(Type); 5450 else 5451 Type = Context.getLValueReferenceType(Type); 5452 break; 5453 case 'V': { 5454 char *End; 5455 unsigned NumElements = strtoul(Str, &End, 10); 5456 assert(End != Str && "Missing vector size"); 5457 Str = End; 5458 5459 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, 5460 RequiresICE, false); 5461 assert(!RequiresICE && "Can't require vector ICE"); 5462 5463 // TODO: No way to make AltiVec vectors in builtins yet. 5464 Type = Context.getVectorType(ElementType, NumElements, 5465 VectorType::GenericVector); 5466 break; 5467 } 5468 case 'X': { 5469 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, RequiresICE, 5470 false); 5471 assert(!RequiresICE && "Can't require complex ICE"); 5472 Type = Context.getComplexType(ElementType); 5473 break; 5474 } 5475 case 'P': 5476 Type = Context.getFILEType(); 5477 if (Type.isNull()) { 5478 Error = ASTContext::GE_Missing_stdio; 5479 return QualType(); 5480 } 5481 break; 5482 case 'J': 5483 if (Signed) 5484 Type = Context.getsigjmp_bufType(); 5485 else 5486 Type = Context.getjmp_bufType(); 5487 5488 if (Type.isNull()) { 5489 Error = ASTContext::GE_Missing_setjmp; 5490 return QualType(); 5491 } 5492 break; 5493 } 5494 5495 // If there are modifiers and if we're allowed to parse them, go for it. 5496 Done = !AllowTypeModifiers; 5497 while (!Done) { 5498 switch (char c = *Str++) { 5499 default: Done = true; --Str; break; 5500 case '*': 5501 case '&': { 5502 // Both pointers and references can have their pointee types 5503 // qualified with an address space. 5504 char *End; 5505 unsigned AddrSpace = strtoul(Str, &End, 10); 5506 if (End != Str && AddrSpace != 0) { 5507 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 5508 Str = End; 5509 } 5510 if (c == '*') 5511 Type = Context.getPointerType(Type); 5512 else 5513 Type = Context.getLValueReferenceType(Type); 5514 break; 5515 } 5516 // FIXME: There's no way to have a built-in with an rvalue ref arg. 5517 case 'C': 5518 Type = Type.withConst(); 5519 break; 5520 case 'D': 5521 Type = Context.getVolatileType(Type); 5522 break; 5523 } 5524 } 5525 5526 assert((!RequiresICE || Type->isIntegralOrEnumerationType()) && 5527 "Integer constant 'I' type must be an integer"); 5528 5529 return Type; 5530} 5531 5532/// GetBuiltinType - Return the type for the specified builtin. 5533QualType ASTContext::GetBuiltinType(unsigned Id, 5534 GetBuiltinTypeError &Error, 5535 unsigned *IntegerConstantArgs) { 5536 const char *TypeStr = BuiltinInfo.GetTypeString(Id); 5537 5538 llvm::SmallVector<QualType, 8> ArgTypes; 5539 5540 bool RequiresICE = false; 5541 Error = GE_None; 5542 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error, 5543 RequiresICE, true); 5544 if (Error != GE_None) 5545 return QualType(); 5546 5547 assert(!RequiresICE && "Result of intrinsic cannot be required to be an ICE"); 5548 5549 while (TypeStr[0] && TypeStr[0] != '.') { 5550 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error, RequiresICE, true); 5551 if (Error != GE_None) 5552 return QualType(); 5553 5554 // If this argument is required to be an IntegerConstantExpression and the 5555 // caller cares, fill in the bitmask we return. 5556 if (RequiresICE && IntegerConstantArgs) 5557 *IntegerConstantArgs |= 1 << ArgTypes.size(); 5558 5559 // Do array -> pointer decay. The builtin should use the decayed type. 5560 if (Ty->isArrayType()) 5561 Ty = getArrayDecayedType(Ty); 5562 5563 ArgTypes.push_back(Ty); 5564 } 5565 5566 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 5567 "'.' should only occur at end of builtin type list!"); 5568 5569 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 5570 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 5571 return getFunctionNoProtoType(ResType); 5572 5573 FunctionProtoType::ExtProtoInfo EPI; 5574 EPI.Variadic = (TypeStr[0] == '.'); 5575 // FIXME: Should we create noreturn types? 5576 5577 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), EPI); 5578} 5579 5580GVALinkage ASTContext::GetGVALinkageForFunction(const FunctionDecl *FD) { 5581 GVALinkage External = GVA_StrongExternal; 5582 5583 Linkage L = FD->getLinkage(); 5584 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 5585 FD->getType()->getLinkage() == UniqueExternalLinkage) 5586 L = UniqueExternalLinkage; 5587 5588 switch (L) { 5589 case NoLinkage: 5590 case InternalLinkage: 5591 case UniqueExternalLinkage: 5592 return GVA_Internal; 5593 5594 case ExternalLinkage: 5595 switch (FD->getTemplateSpecializationKind()) { 5596 case TSK_Undeclared: 5597 case TSK_ExplicitSpecialization: 5598 External = GVA_StrongExternal; 5599 break; 5600 5601 case TSK_ExplicitInstantiationDefinition: 5602 return GVA_ExplicitTemplateInstantiation; 5603 5604 case TSK_ExplicitInstantiationDeclaration: 5605 case TSK_ImplicitInstantiation: 5606 External = GVA_TemplateInstantiation; 5607 break; 5608 } 5609 } 5610 5611 if (!FD->isInlined()) 5612 return External; 5613 5614 if (!getLangOptions().CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 5615 // GNU or C99 inline semantics. Determine whether this symbol should be 5616 // externally visible. 5617 if (FD->isInlineDefinitionExternallyVisible()) 5618 return External; 5619 5620 // C99 inline semantics, where the symbol is not externally visible. 5621 return GVA_C99Inline; 5622 } 5623 5624 // C++0x [temp.explicit]p9: 5625 // [ Note: The intent is that an inline function that is the subject of 5626 // an explicit instantiation declaration will still be implicitly 5627 // instantiated when used so that the body can be considered for 5628 // inlining, but that no out-of-line copy of the inline function would be 5629 // generated in the translation unit. -- end note ] 5630 if (FD->getTemplateSpecializationKind() 5631 == TSK_ExplicitInstantiationDeclaration) 5632 return GVA_C99Inline; 5633 5634 return GVA_CXXInline; 5635} 5636 5637GVALinkage ASTContext::GetGVALinkageForVariable(const VarDecl *VD) { 5638 // If this is a static data member, compute the kind of template 5639 // specialization. Otherwise, this variable is not part of a 5640 // template. 5641 TemplateSpecializationKind TSK = TSK_Undeclared; 5642 if (VD->isStaticDataMember()) 5643 TSK = VD->getTemplateSpecializationKind(); 5644 5645 Linkage L = VD->getLinkage(); 5646 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 5647 VD->getType()->getLinkage() == UniqueExternalLinkage) 5648 L = UniqueExternalLinkage; 5649 5650 switch (L) { 5651 case NoLinkage: 5652 case InternalLinkage: 5653 case UniqueExternalLinkage: 5654 return GVA_Internal; 5655 5656 case ExternalLinkage: 5657 switch (TSK) { 5658 case TSK_Undeclared: 5659 case TSK_ExplicitSpecialization: 5660 return GVA_StrongExternal; 5661 5662 case TSK_ExplicitInstantiationDeclaration: 5663 llvm_unreachable("Variable should not be instantiated"); 5664 // Fall through to treat this like any other instantiation. 5665 5666 case TSK_ExplicitInstantiationDefinition: 5667 return GVA_ExplicitTemplateInstantiation; 5668 5669 case TSK_ImplicitInstantiation: 5670 return GVA_TemplateInstantiation; 5671 } 5672 } 5673 5674 return GVA_StrongExternal; 5675} 5676 5677bool ASTContext::DeclMustBeEmitted(const Decl *D) { 5678 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 5679 if (!VD->isFileVarDecl()) 5680 return false; 5681 } else if (!isa<FunctionDecl>(D)) 5682 return false; 5683 5684 // Weak references don't produce any output by themselves. 5685 if (D->hasAttr<WeakRefAttr>()) 5686 return false; 5687 5688 // Aliases and used decls are required. 5689 if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>()) 5690 return true; 5691 5692 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 5693 // Forward declarations aren't required. 5694 if (!FD->isThisDeclarationADefinition()) 5695 return false; 5696 5697 // Constructors and destructors are required. 5698 if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>()) 5699 return true; 5700 5701 // The key function for a class is required. 5702 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 5703 const CXXRecordDecl *RD = MD->getParent(); 5704 if (MD->isOutOfLine() && RD->isDynamicClass()) { 5705 const CXXMethodDecl *KeyFunc = getKeyFunction(RD); 5706 if (KeyFunc && KeyFunc->getCanonicalDecl() == MD->getCanonicalDecl()) 5707 return true; 5708 } 5709 } 5710 5711 GVALinkage Linkage = GetGVALinkageForFunction(FD); 5712 5713 // static, static inline, always_inline, and extern inline functions can 5714 // always be deferred. Normal inline functions can be deferred in C99/C++. 5715 // Implicit template instantiations can also be deferred in C++. 5716 if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 5717 Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 5718 return false; 5719 return true; 5720 } 5721 5722 const VarDecl *VD = cast<VarDecl>(D); 5723 assert(VD->isFileVarDecl() && "Expected file scoped var"); 5724 5725 if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) 5726 return false; 5727 5728 // Structs that have non-trivial constructors or destructors are required. 5729 5730 // FIXME: Handle references. 5731 if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { 5732 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 5733 if (RD->hasDefinition() && 5734 (!RD->hasTrivialConstructor() || !RD->hasTrivialDestructor())) 5735 return true; 5736 } 5737 } 5738 5739 GVALinkage L = GetGVALinkageForVariable(VD); 5740 if (L == GVA_Internal || L == GVA_TemplateInstantiation) { 5741 if (!(VD->getInit() && VD->getInit()->HasSideEffects(*this))) 5742 return false; 5743 } 5744 5745 return true; 5746} 5747 5748CallingConv ASTContext::getDefaultMethodCallConv() { 5749 // Pass through to the C++ ABI object 5750 return ABI->getDefaultMethodCallConv(); 5751} 5752 5753bool ASTContext::isNearlyEmpty(const CXXRecordDecl *RD) { 5754 // Pass through to the C++ ABI object 5755 return ABI->isNearlyEmpty(RD); 5756} 5757 5758CXXABI::~CXXABI() {} 5759