ASTContext.cpp revision 344577e6b58f42d18dc8118c8903b49a85dc005e
15d71de26cedae3dafc17449fe0182045c0bd20e8Stephen Hines//===--- ASTContext.cpp - Context to hold long-lived AST nodes ------------===// 2fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov// 3fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov// The LLVM Compiler Infrastructure 4fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov// 5fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov// This file is distributed under the University of Illinois Open Source 6fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov// License. See LICENSE.TXT for details. 72d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines// 8fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov//===----------------------------------------------------------------------===// 9fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov// 10fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov// This file implements the ASTContext interface. 11fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov// 12fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov//===----------------------------------------------------------------------===// 13fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov 14fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov#include "clang/AST/ASTContext.h" 15fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov#include "clang/AST/CharUnits.h" 16fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov#include "clang/AST/DeclCXX.h" 17fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov#include "clang/AST/DeclObjC.h" 18fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov#include "clang/AST/DeclTemplate.h" 19fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov#include "clang/AST/TypeLoc.h" 20fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov#include "clang/AST/Expr.h" 21fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov#include "clang/AST/ExprCXX.h" 22fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov#include "clang/AST/ExternalASTSource.h" 23fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov#include "clang/AST/ASTMutationListener.h" 24fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov#include "clang/AST/RecordLayout.h" 25fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov#include "clang/AST/Mangle.h" 26fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov#include "clang/Basic/Builtins.h" 27fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov#include "clang/Basic/SourceManager.h" 28fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov#include "clang/Basic/TargetInfo.h" 29fb917e9069ea44f7103f50c658be84a8f66de56cDmitry Vyukov#include "llvm/ADT/SmallString.h" 30#include "llvm/ADT/StringExtras.h" 31#include "llvm/Support/MathExtras.h" 32#include "llvm/Support/raw_ostream.h" 33#include "CXXABI.h" 34 35using namespace clang; 36 37unsigned ASTContext::NumImplicitDefaultConstructors; 38unsigned ASTContext::NumImplicitDefaultConstructorsDeclared; 39unsigned ASTContext::NumImplicitCopyConstructors; 40unsigned ASTContext::NumImplicitCopyConstructorsDeclared; 41unsigned ASTContext::NumImplicitCopyAssignmentOperators; 42unsigned ASTContext::NumImplicitCopyAssignmentOperatorsDeclared; 43unsigned ASTContext::NumImplicitDestructors; 44unsigned ASTContext::NumImplicitDestructorsDeclared; 45 46enum FloatingRank { 47 FloatRank, DoubleRank, LongDoubleRank 48}; 49 50void 51ASTContext::CanonicalTemplateTemplateParm::Profile(llvm::FoldingSetNodeID &ID, 52 TemplateTemplateParmDecl *Parm) { 53 ID.AddInteger(Parm->getDepth()); 54 ID.AddInteger(Parm->getPosition()); 55 ID.AddBoolean(Parm->isParameterPack()); 56 57 TemplateParameterList *Params = Parm->getTemplateParameters(); 58 ID.AddInteger(Params->size()); 59 for (TemplateParameterList::const_iterator P = Params->begin(), 60 PEnd = Params->end(); 61 P != PEnd; ++P) { 62 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) { 63 ID.AddInteger(0); 64 ID.AddBoolean(TTP->isParameterPack()); 65 continue; 66 } 67 68 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 69 ID.AddInteger(1); 70 ID.AddBoolean(NTTP->isParameterPack()); 71 ID.AddPointer(NTTP->getType().getAsOpaquePtr()); 72 if (NTTP->isExpandedParameterPack()) { 73 ID.AddBoolean(true); 74 ID.AddInteger(NTTP->getNumExpansionTypes()); 75 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) 76 ID.AddPointer(NTTP->getExpansionType(I).getAsOpaquePtr()); 77 } else 78 ID.AddBoolean(false); 79 continue; 80 } 81 82 TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P); 83 ID.AddInteger(2); 84 Profile(ID, TTP); 85 } 86} 87 88TemplateTemplateParmDecl * 89ASTContext::getCanonicalTemplateTemplateParmDecl( 90 TemplateTemplateParmDecl *TTP) const { 91 // Check if we already have a canonical template template parameter. 92 llvm::FoldingSetNodeID ID; 93 CanonicalTemplateTemplateParm::Profile(ID, TTP); 94 void *InsertPos = 0; 95 CanonicalTemplateTemplateParm *Canonical 96 = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 97 if (Canonical) 98 return Canonical->getParam(); 99 100 // Build a canonical template parameter list. 101 TemplateParameterList *Params = TTP->getTemplateParameters(); 102 llvm::SmallVector<NamedDecl *, 4> CanonParams; 103 CanonParams.reserve(Params->size()); 104 for (TemplateParameterList::const_iterator P = Params->begin(), 105 PEnd = Params->end(); 106 P != PEnd; ++P) { 107 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) 108 CanonParams.push_back( 109 TemplateTypeParmDecl::Create(*this, getTranslationUnitDecl(), 110 SourceLocation(), 111 SourceLocation(), 112 TTP->getDepth(), 113 TTP->getIndex(), 0, false, 114 TTP->isParameterPack())); 115 else if (NonTypeTemplateParmDecl *NTTP 116 = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 117 QualType T = getCanonicalType(NTTP->getType()); 118 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(T); 119 NonTypeTemplateParmDecl *Param; 120 if (NTTP->isExpandedParameterPack()) { 121 llvm::SmallVector<QualType, 2> ExpandedTypes; 122 llvm::SmallVector<TypeSourceInfo *, 2> ExpandedTInfos; 123 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) { 124 ExpandedTypes.push_back(getCanonicalType(NTTP->getExpansionType(I))); 125 ExpandedTInfos.push_back( 126 getTrivialTypeSourceInfo(ExpandedTypes.back())); 127 } 128 129 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 130 SourceLocation(), 131 NTTP->getDepth(), 132 NTTP->getPosition(), 0, 133 T, 134 TInfo, 135 ExpandedTypes.data(), 136 ExpandedTypes.size(), 137 ExpandedTInfos.data()); 138 } else { 139 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 140 SourceLocation(), 141 NTTP->getDepth(), 142 NTTP->getPosition(), 0, 143 T, 144 NTTP->isParameterPack(), 145 TInfo); 146 } 147 CanonParams.push_back(Param); 148 149 } else 150 CanonParams.push_back(getCanonicalTemplateTemplateParmDecl( 151 cast<TemplateTemplateParmDecl>(*P))); 152 } 153 154 TemplateTemplateParmDecl *CanonTTP 155 = TemplateTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 156 SourceLocation(), TTP->getDepth(), 157 TTP->getPosition(), 158 TTP->isParameterPack(), 159 0, 160 TemplateParameterList::Create(*this, SourceLocation(), 161 SourceLocation(), 162 CanonParams.data(), 163 CanonParams.size(), 164 SourceLocation())); 165 166 // Get the new insert position for the node we care about. 167 Canonical = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 168 assert(Canonical == 0 && "Shouldn't be in the map!"); 169 (void)Canonical; 170 171 // Create the canonical template template parameter entry. 172 Canonical = new (*this) CanonicalTemplateTemplateParm(CanonTTP); 173 CanonTemplateTemplateParms.InsertNode(Canonical, InsertPos); 174 return CanonTTP; 175} 176 177CXXABI *ASTContext::createCXXABI(const TargetInfo &T) { 178 if (!LangOpts.CPlusPlus) return 0; 179 180 switch (T.getCXXABI()) { 181 case CXXABI_ARM: 182 return CreateARMCXXABI(*this); 183 case CXXABI_Itanium: 184 return CreateItaniumCXXABI(*this); 185 case CXXABI_Microsoft: 186 return CreateMicrosoftCXXABI(*this); 187 } 188 return 0; 189} 190 191ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 192 const TargetInfo &t, 193 IdentifierTable &idents, SelectorTable &sels, 194 Builtin::Context &builtins, 195 unsigned size_reserve) : 196 TemplateSpecializationTypes(this_()), 197 DependentTemplateSpecializationTypes(this_()), 198 GlobalNestedNameSpecifier(0), IsInt128Installed(false), 199 CFConstantStringTypeDecl(0), NSConstantStringTypeDecl(0), 200 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 201 sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 202 cudaConfigureCallDecl(0), 203 NullTypeSourceInfo(QualType()), 204 SourceMgr(SM), LangOpts(LOpts), ABI(createCXXABI(t)), Target(t), 205 Idents(idents), Selectors(sels), 206 BuiltinInfo(builtins), 207 DeclarationNames(*this), 208 ExternalSource(0), Listener(0), PrintingPolicy(LOpts), 209 LastSDM(0, 0), 210 UniqueBlockByRefTypeID(0) { 211 ObjCIdRedefinitionType = QualType(); 212 ObjCClassRedefinitionType = QualType(); 213 ObjCSelRedefinitionType = QualType(); 214 if (size_reserve > 0) Types.reserve(size_reserve); 215 TUDecl = TranslationUnitDecl::Create(*this); 216 InitBuiltinTypes(); 217} 218 219ASTContext::~ASTContext() { 220 // Release the DenseMaps associated with DeclContext objects. 221 // FIXME: Is this the ideal solution? 222 ReleaseDeclContextMaps(); 223 224 // Call all of the deallocation functions. 225 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 226 Deallocations[I].first(Deallocations[I].second); 227 228 // Release all of the memory associated with overridden C++ methods. 229 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 230 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 231 OM != OMEnd; ++OM) 232 OM->second.Destroy(); 233 234 // ASTRecordLayout objects in ASTRecordLayouts must always be destroyed 235 // because they can contain DenseMaps. 236 for (llvm::DenseMap<const ObjCContainerDecl*, 237 const ASTRecordLayout*>::iterator 238 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) 239 // Increment in loop to prevent using deallocated memory. 240 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 241 R->Destroy(*this); 242 243 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 244 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 245 // Increment in loop to prevent using deallocated memory. 246 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 247 R->Destroy(*this); 248 } 249 250 for (llvm::DenseMap<const Decl*, AttrVec*>::iterator A = DeclAttrs.begin(), 251 AEnd = DeclAttrs.end(); 252 A != AEnd; ++A) 253 A->second->~AttrVec(); 254} 255 256void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 257 Deallocations.push_back(std::make_pair(Callback, Data)); 258} 259 260void 261ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 262 ExternalSource.reset(Source.take()); 263} 264 265void ASTContext::PrintStats() const { 266 fprintf(stderr, "*** AST Context Stats:\n"); 267 fprintf(stderr, " %d types total.\n", (int)Types.size()); 268 269 unsigned counts[] = { 270#define TYPE(Name, Parent) 0, 271#define ABSTRACT_TYPE(Name, Parent) 272#include "clang/AST/TypeNodes.def" 273 0 // Extra 274 }; 275 276 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 277 Type *T = Types[i]; 278 counts[(unsigned)T->getTypeClass()]++; 279 } 280 281 unsigned Idx = 0; 282 unsigned TotalBytes = 0; 283#define TYPE(Name, Parent) \ 284 if (counts[Idx]) \ 285 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 286 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 287 ++Idx; 288#define ABSTRACT_TYPE(Name, Parent) 289#include "clang/AST/TypeNodes.def" 290 291 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 292 293 // Implicit special member functions. 294 fprintf(stderr, " %u/%u implicit default constructors created\n", 295 NumImplicitDefaultConstructorsDeclared, 296 NumImplicitDefaultConstructors); 297 fprintf(stderr, " %u/%u implicit copy constructors created\n", 298 NumImplicitCopyConstructorsDeclared, 299 NumImplicitCopyConstructors); 300 fprintf(stderr, " %u/%u implicit copy assignment operators created\n", 301 NumImplicitCopyAssignmentOperatorsDeclared, 302 NumImplicitCopyAssignmentOperators); 303 fprintf(stderr, " %u/%u implicit destructors created\n", 304 NumImplicitDestructorsDeclared, NumImplicitDestructors); 305 306 if (ExternalSource.get()) { 307 fprintf(stderr, "\n"); 308 ExternalSource->PrintStats(); 309 } 310 311 BumpAlloc.PrintStats(); 312} 313 314 315void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 316 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 317 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 318 Types.push_back(Ty); 319} 320 321void ASTContext::InitBuiltinTypes() { 322 assert(VoidTy.isNull() && "Context reinitialized?"); 323 324 // C99 6.2.5p19. 325 InitBuiltinType(VoidTy, BuiltinType::Void); 326 327 // C99 6.2.5p2. 328 InitBuiltinType(BoolTy, BuiltinType::Bool); 329 // C99 6.2.5p3. 330 if (LangOpts.CharIsSigned) 331 InitBuiltinType(CharTy, BuiltinType::Char_S); 332 else 333 InitBuiltinType(CharTy, BuiltinType::Char_U); 334 // C99 6.2.5p4. 335 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 336 InitBuiltinType(ShortTy, BuiltinType::Short); 337 InitBuiltinType(IntTy, BuiltinType::Int); 338 InitBuiltinType(LongTy, BuiltinType::Long); 339 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 340 341 // C99 6.2.5p6. 342 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 343 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 344 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 345 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 346 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 347 348 // C99 6.2.5p10. 349 InitBuiltinType(FloatTy, BuiltinType::Float); 350 InitBuiltinType(DoubleTy, BuiltinType::Double); 351 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 352 353 // GNU extension, 128-bit integers. 354 InitBuiltinType(Int128Ty, BuiltinType::Int128); 355 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 356 357 if (LangOpts.CPlusPlus) { // C++ 3.9.1p5 358 if (!LangOpts.ShortWChar) 359 InitBuiltinType(WCharTy, BuiltinType::WChar_S); 360 else // -fshort-wchar makes wchar_t be unsigned. 361 InitBuiltinType(WCharTy, BuiltinType::WChar_U); 362 } else // C99 363 WCharTy = getFromTargetType(Target.getWCharType()); 364 365 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 366 InitBuiltinType(Char16Ty, BuiltinType::Char16); 367 else // C99 368 Char16Ty = getFromTargetType(Target.getChar16Type()); 369 370 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 371 InitBuiltinType(Char32Ty, BuiltinType::Char32); 372 else // C99 373 Char32Ty = getFromTargetType(Target.getChar32Type()); 374 375 // Placeholder type for type-dependent expressions whose type is 376 // completely unknown. No code should ever check a type against 377 // DependentTy and users should never see it; however, it is here to 378 // help diagnose failures to properly check for type-dependent 379 // expressions. 380 InitBuiltinType(DependentTy, BuiltinType::Dependent); 381 382 // Placeholder type for functions. 383 InitBuiltinType(OverloadTy, BuiltinType::Overload); 384 385 // C99 6.2.5p11. 386 FloatComplexTy = getComplexType(FloatTy); 387 DoubleComplexTy = getComplexType(DoubleTy); 388 LongDoubleComplexTy = getComplexType(LongDoubleTy); 389 390 BuiltinVaListType = QualType(); 391 392 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 393 ObjCIdTypedefType = QualType(); 394 ObjCClassTypedefType = QualType(); 395 ObjCSelTypedefType = QualType(); 396 397 // Builtin types for 'id', 'Class', and 'SEL'. 398 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 399 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 400 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 401 402 ObjCConstantStringType = QualType(); 403 404 // void * type 405 VoidPtrTy = getPointerType(VoidTy); 406 407 // nullptr type (C++0x 2.14.7) 408 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 409} 410 411Diagnostic &ASTContext::getDiagnostics() const { 412 return SourceMgr.getDiagnostics(); 413} 414 415AttrVec& ASTContext::getDeclAttrs(const Decl *D) { 416 AttrVec *&Result = DeclAttrs[D]; 417 if (!Result) { 418 void *Mem = Allocate(sizeof(AttrVec)); 419 Result = new (Mem) AttrVec; 420 } 421 422 return *Result; 423} 424 425/// \brief Erase the attributes corresponding to the given declaration. 426void ASTContext::eraseDeclAttrs(const Decl *D) { 427 llvm::DenseMap<const Decl*, AttrVec*>::iterator Pos = DeclAttrs.find(D); 428 if (Pos != DeclAttrs.end()) { 429 Pos->second->~AttrVec(); 430 DeclAttrs.erase(Pos); 431 } 432} 433 434 435MemberSpecializationInfo * 436ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 437 assert(Var->isStaticDataMember() && "Not a static data member"); 438 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 439 = InstantiatedFromStaticDataMember.find(Var); 440 if (Pos == InstantiatedFromStaticDataMember.end()) 441 return 0; 442 443 return Pos->second; 444} 445 446void 447ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 448 TemplateSpecializationKind TSK, 449 SourceLocation PointOfInstantiation) { 450 assert(Inst->isStaticDataMember() && "Not a static data member"); 451 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 452 assert(!InstantiatedFromStaticDataMember[Inst] && 453 "Already noted what static data member was instantiated from"); 454 InstantiatedFromStaticDataMember[Inst] 455 = new (*this) MemberSpecializationInfo(Tmpl, TSK, PointOfInstantiation); 456} 457 458NamedDecl * 459ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 460 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 461 = InstantiatedFromUsingDecl.find(UUD); 462 if (Pos == InstantiatedFromUsingDecl.end()) 463 return 0; 464 465 return Pos->second; 466} 467 468void 469ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 470 assert((isa<UsingDecl>(Pattern) || 471 isa<UnresolvedUsingValueDecl>(Pattern) || 472 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 473 "pattern decl is not a using decl"); 474 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 475 InstantiatedFromUsingDecl[Inst] = Pattern; 476} 477 478UsingShadowDecl * 479ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 480 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 481 = InstantiatedFromUsingShadowDecl.find(Inst); 482 if (Pos == InstantiatedFromUsingShadowDecl.end()) 483 return 0; 484 485 return Pos->second; 486} 487 488void 489ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 490 UsingShadowDecl *Pattern) { 491 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 492 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 493} 494 495FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 496 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 497 = InstantiatedFromUnnamedFieldDecl.find(Field); 498 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 499 return 0; 500 501 return Pos->second; 502} 503 504void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 505 FieldDecl *Tmpl) { 506 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 507 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 508 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 509 "Already noted what unnamed field was instantiated from"); 510 511 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 512} 513 514ASTContext::overridden_cxx_method_iterator 515ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 516 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 517 = OverriddenMethods.find(Method); 518 if (Pos == OverriddenMethods.end()) 519 return 0; 520 521 return Pos->second.begin(); 522} 523 524ASTContext::overridden_cxx_method_iterator 525ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 526 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 527 = OverriddenMethods.find(Method); 528 if (Pos == OverriddenMethods.end()) 529 return 0; 530 531 return Pos->second.end(); 532} 533 534unsigned 535ASTContext::overridden_methods_size(const CXXMethodDecl *Method) const { 536 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 537 = OverriddenMethods.find(Method); 538 if (Pos == OverriddenMethods.end()) 539 return 0; 540 541 return Pos->second.size(); 542} 543 544void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 545 const CXXMethodDecl *Overridden) { 546 OverriddenMethods[Method].push_back(Overridden); 547} 548 549//===----------------------------------------------------------------------===// 550// Type Sizing and Analysis 551//===----------------------------------------------------------------------===// 552 553/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 554/// scalar floating point type. 555const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 556 const BuiltinType *BT = T->getAs<BuiltinType>(); 557 assert(BT && "Not a floating point type!"); 558 switch (BT->getKind()) { 559 default: assert(0 && "Not a floating point type!"); 560 case BuiltinType::Float: return Target.getFloatFormat(); 561 case BuiltinType::Double: return Target.getDoubleFormat(); 562 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 563 } 564} 565 566/// getDeclAlign - Return a conservative estimate of the alignment of the 567/// specified decl. Note that bitfields do not have a valid alignment, so 568/// this method will assert on them. 569/// If @p RefAsPointee, references are treated like their underlying type 570/// (for alignof), else they're treated like pointers (for CodeGen). 571CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) const { 572 unsigned Align = Target.getCharWidth(); 573 574 bool UseAlignAttrOnly = false; 575 if (unsigned AlignFromAttr = D->getMaxAlignment()) { 576 Align = AlignFromAttr; 577 578 // __attribute__((aligned)) can increase or decrease alignment 579 // *except* on a struct or struct member, where it only increases 580 // alignment unless 'packed' is also specified. 581 // 582 // It is an error for [[align]] to decrease alignment, so we can 583 // ignore that possibility; Sema should diagnose it. 584 if (isa<FieldDecl>(D)) { 585 UseAlignAttrOnly = D->hasAttr<PackedAttr>() || 586 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 587 } else { 588 UseAlignAttrOnly = true; 589 } 590 } 591 592 // If we're using the align attribute only, just ignore everything 593 // else about the declaration and its type. 594 if (UseAlignAttrOnly) { 595 // do nothing 596 597 } else if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 598 QualType T = VD->getType(); 599 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 600 if (RefAsPointee) 601 T = RT->getPointeeType(); 602 else 603 T = getPointerType(RT->getPointeeType()); 604 } 605 if (!T->isIncompleteType() && !T->isFunctionType()) { 606 // Adjust alignments of declarations with array type by the 607 // large-array alignment on the target. 608 unsigned MinWidth = Target.getLargeArrayMinWidth(); 609 const ArrayType *arrayType; 610 if (MinWidth && (arrayType = getAsArrayType(T))) { 611 if (isa<VariableArrayType>(arrayType)) 612 Align = std::max(Align, Target.getLargeArrayAlign()); 613 else if (isa<ConstantArrayType>(arrayType) && 614 MinWidth <= getTypeSize(cast<ConstantArrayType>(arrayType))) 615 Align = std::max(Align, Target.getLargeArrayAlign()); 616 617 // Walk through any array types while we're at it. 618 T = getBaseElementType(arrayType); 619 } 620 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 621 } 622 623 // Fields can be subject to extra alignment constraints, like if 624 // the field is packed, the struct is packed, or the struct has a 625 // a max-field-alignment constraint (#pragma pack). So calculate 626 // the actual alignment of the field within the struct, and then 627 // (as we're expected to) constrain that by the alignment of the type. 628 if (const FieldDecl *field = dyn_cast<FieldDecl>(VD)) { 629 // So calculate the alignment of the field. 630 const ASTRecordLayout &layout = getASTRecordLayout(field->getParent()); 631 632 // Start with the record's overall alignment. 633 unsigned fieldAlign = toBits(layout.getAlignment()); 634 635 // Use the GCD of that and the offset within the record. 636 uint64_t offset = layout.getFieldOffset(field->getFieldIndex()); 637 if (offset > 0) { 638 // Alignment is always a power of 2, so the GCD will be a power of 2, 639 // which means we get to do this crazy thing instead of Euclid's. 640 uint64_t lowBitOfOffset = offset & (~offset + 1); 641 if (lowBitOfOffset < fieldAlign) 642 fieldAlign = static_cast<unsigned>(lowBitOfOffset); 643 } 644 645 Align = std::min(Align, fieldAlign); 646 } 647 } 648 649 return toCharUnitsFromBits(Align); 650} 651 652std::pair<CharUnits, CharUnits> 653ASTContext::getTypeInfoInChars(const Type *T) const { 654 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 655 return std::make_pair(toCharUnitsFromBits(Info.first), 656 toCharUnitsFromBits(Info.second)); 657} 658 659std::pair<CharUnits, CharUnits> 660ASTContext::getTypeInfoInChars(QualType T) const { 661 return getTypeInfoInChars(T.getTypePtr()); 662} 663 664/// getTypeSize - Return the size of the specified type, in bits. This method 665/// does not work on incomplete types. 666/// 667/// FIXME: Pointers into different addr spaces could have different sizes and 668/// alignment requirements: getPointerInfo should take an AddrSpace, this 669/// should take a QualType, &c. 670std::pair<uint64_t, unsigned> 671ASTContext::getTypeInfo(const Type *T) const { 672 uint64_t Width=0; 673 unsigned Align=8; 674 switch (T->getTypeClass()) { 675#define TYPE(Class, Base) 676#define ABSTRACT_TYPE(Class, Base) 677#define NON_CANONICAL_TYPE(Class, Base) 678#define DEPENDENT_TYPE(Class, Base) case Type::Class: 679#include "clang/AST/TypeNodes.def" 680 assert(false && "Should not see dependent types"); 681 break; 682 683 case Type::FunctionNoProto: 684 case Type::FunctionProto: 685 // GCC extension: alignof(function) = 32 bits 686 Width = 0; 687 Align = 32; 688 break; 689 690 case Type::IncompleteArray: 691 case Type::VariableArray: 692 Width = 0; 693 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 694 break; 695 696 case Type::ConstantArray: { 697 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 698 699 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 700 Width = EltInfo.first*CAT->getSize().getZExtValue(); 701 Align = EltInfo.second; 702 break; 703 } 704 case Type::ExtVector: 705 case Type::Vector: { 706 const VectorType *VT = cast<VectorType>(T); 707 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 708 Width = EltInfo.first*VT->getNumElements(); 709 Align = Width; 710 // If the alignment is not a power of 2, round up to the next power of 2. 711 // This happens for non-power-of-2 length vectors. 712 if (Align & (Align-1)) { 713 Align = llvm::NextPowerOf2(Align); 714 Width = llvm::RoundUpToAlignment(Width, Align); 715 } 716 break; 717 } 718 719 case Type::Builtin: 720 switch (cast<BuiltinType>(T)->getKind()) { 721 default: assert(0 && "Unknown builtin type!"); 722 case BuiltinType::Void: 723 // GCC extension: alignof(void) = 8 bits. 724 Width = 0; 725 Align = 8; 726 break; 727 728 case BuiltinType::Bool: 729 Width = Target.getBoolWidth(); 730 Align = Target.getBoolAlign(); 731 break; 732 case BuiltinType::Char_S: 733 case BuiltinType::Char_U: 734 case BuiltinType::UChar: 735 case BuiltinType::SChar: 736 Width = Target.getCharWidth(); 737 Align = Target.getCharAlign(); 738 break; 739 case BuiltinType::WChar_S: 740 case BuiltinType::WChar_U: 741 Width = Target.getWCharWidth(); 742 Align = Target.getWCharAlign(); 743 break; 744 case BuiltinType::Char16: 745 Width = Target.getChar16Width(); 746 Align = Target.getChar16Align(); 747 break; 748 case BuiltinType::Char32: 749 Width = Target.getChar32Width(); 750 Align = Target.getChar32Align(); 751 break; 752 case BuiltinType::UShort: 753 case BuiltinType::Short: 754 Width = Target.getShortWidth(); 755 Align = Target.getShortAlign(); 756 break; 757 case BuiltinType::UInt: 758 case BuiltinType::Int: 759 Width = Target.getIntWidth(); 760 Align = Target.getIntAlign(); 761 break; 762 case BuiltinType::ULong: 763 case BuiltinType::Long: 764 Width = Target.getLongWidth(); 765 Align = Target.getLongAlign(); 766 break; 767 case BuiltinType::ULongLong: 768 case BuiltinType::LongLong: 769 Width = Target.getLongLongWidth(); 770 Align = Target.getLongLongAlign(); 771 break; 772 case BuiltinType::Int128: 773 case BuiltinType::UInt128: 774 Width = 128; 775 Align = 128; // int128_t is 128-bit aligned on all targets. 776 break; 777 case BuiltinType::Float: 778 Width = Target.getFloatWidth(); 779 Align = Target.getFloatAlign(); 780 break; 781 case BuiltinType::Double: 782 Width = Target.getDoubleWidth(); 783 Align = Target.getDoubleAlign(); 784 break; 785 case BuiltinType::LongDouble: 786 Width = Target.getLongDoubleWidth(); 787 Align = Target.getLongDoubleAlign(); 788 break; 789 case BuiltinType::NullPtr: 790 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 791 Align = Target.getPointerAlign(0); // == sizeof(void*) 792 break; 793 case BuiltinType::ObjCId: 794 case BuiltinType::ObjCClass: 795 case BuiltinType::ObjCSel: 796 Width = Target.getPointerWidth(0); 797 Align = Target.getPointerAlign(0); 798 break; 799 } 800 break; 801 case Type::ObjCObjectPointer: 802 Width = Target.getPointerWidth(0); 803 Align = Target.getPointerAlign(0); 804 break; 805 case Type::BlockPointer: { 806 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 807 Width = Target.getPointerWidth(AS); 808 Align = Target.getPointerAlign(AS); 809 break; 810 } 811 case Type::LValueReference: 812 case Type::RValueReference: { 813 // alignof and sizeof should never enter this code path here, so we go 814 // the pointer route. 815 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 816 Width = Target.getPointerWidth(AS); 817 Align = Target.getPointerAlign(AS); 818 break; 819 } 820 case Type::Pointer: { 821 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 822 Width = Target.getPointerWidth(AS); 823 Align = Target.getPointerAlign(AS); 824 break; 825 } 826 case Type::MemberPointer: { 827 const MemberPointerType *MPT = cast<MemberPointerType>(T); 828 std::pair<uint64_t, unsigned> PtrDiffInfo = 829 getTypeInfo(getPointerDiffType()); 830 Width = PtrDiffInfo.first * ABI->getMemberPointerSize(MPT); 831 Align = PtrDiffInfo.second; 832 break; 833 } 834 case Type::Complex: { 835 // Complex types have the same alignment as their elements, but twice the 836 // size. 837 std::pair<uint64_t, unsigned> EltInfo = 838 getTypeInfo(cast<ComplexType>(T)->getElementType()); 839 Width = EltInfo.first*2; 840 Align = EltInfo.second; 841 break; 842 } 843 case Type::ObjCObject: 844 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 845 case Type::ObjCInterface: { 846 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 847 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 848 Width = toBits(Layout.getSize()); 849 Align = toBits(Layout.getAlignment()); 850 break; 851 } 852 case Type::Record: 853 case Type::Enum: { 854 const TagType *TT = cast<TagType>(T); 855 856 if (TT->getDecl()->isInvalidDecl()) { 857 Width = 1; 858 Align = 1; 859 break; 860 } 861 862 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 863 return getTypeInfo(ET->getDecl()->getIntegerType()); 864 865 const RecordType *RT = cast<RecordType>(TT); 866 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 867 Width = toBits(Layout.getSize()); 868 Align = toBits(Layout.getAlignment()); 869 break; 870 } 871 872 case Type::SubstTemplateTypeParm: 873 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 874 getReplacementType().getTypePtr()); 875 876 case Type::Auto: { 877 const AutoType *A = cast<AutoType>(T); 878 assert(A->isDeduced() && "Cannot request the size of a dependent type"); 879 return getTypeInfo(A->getDeducedType().getTypePtr()); 880 } 881 882 case Type::Paren: 883 return getTypeInfo(cast<ParenType>(T)->getInnerType().getTypePtr()); 884 885 case Type::Typedef: { 886 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 887 std::pair<uint64_t, unsigned> Info 888 = getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 889 // If the typedef has an aligned attribute on it, it overrides any computed 890 // alignment we have. This violates the GCC documentation (which says that 891 // attribute(aligned) can only round up) but matches its implementation. 892 if (unsigned AttrAlign = Typedef->getMaxAlignment()) 893 Align = AttrAlign; 894 else 895 Align = Info.second; 896 Width = Info.first; 897 break; 898 } 899 900 case Type::TypeOfExpr: 901 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 902 .getTypePtr()); 903 904 case Type::TypeOf: 905 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 906 907 case Type::Decltype: 908 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 909 .getTypePtr()); 910 911 case Type::Elaborated: 912 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 913 914 case Type::Attributed: 915 return getTypeInfo( 916 cast<AttributedType>(T)->getEquivalentType().getTypePtr()); 917 918 case Type::TemplateSpecialization: 919 assert(getCanonicalType(T) != T && 920 "Cannot request the size of a dependent type"); 921 // FIXME: this is likely to be wrong once we support template 922 // aliases, since a template alias could refer to a typedef that 923 // has an __aligned__ attribute on it. 924 return getTypeInfo(getCanonicalType(T)); 925 } 926 927 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 928 return std::make_pair(Width, Align); 929} 930 931/// toCharUnitsFromBits - Convert a size in bits to a size in characters. 932CharUnits ASTContext::toCharUnitsFromBits(int64_t BitSize) const { 933 return CharUnits::fromQuantity(BitSize / getCharWidth()); 934} 935 936/// toBits - Convert a size in characters to a size in characters. 937int64_t ASTContext::toBits(CharUnits CharSize) const { 938 return CharSize.getQuantity() * getCharWidth(); 939} 940 941/// getTypeSizeInChars - Return the size of the specified type, in characters. 942/// This method does not work on incomplete types. 943CharUnits ASTContext::getTypeSizeInChars(QualType T) const { 944 return toCharUnitsFromBits(getTypeSize(T)); 945} 946CharUnits ASTContext::getTypeSizeInChars(const Type *T) const { 947 return toCharUnitsFromBits(getTypeSize(T)); 948} 949 950/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 951/// characters. This method does not work on incomplete types. 952CharUnits ASTContext::getTypeAlignInChars(QualType T) const { 953 return toCharUnitsFromBits(getTypeAlign(T)); 954} 955CharUnits ASTContext::getTypeAlignInChars(const Type *T) const { 956 return toCharUnitsFromBits(getTypeAlign(T)); 957} 958 959/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 960/// type for the current target in bits. This can be different than the ABI 961/// alignment in cases where it is beneficial for performance to overalign 962/// a data type. 963unsigned ASTContext::getPreferredTypeAlign(const Type *T) const { 964 unsigned ABIAlign = getTypeAlign(T); 965 966 // Double and long long should be naturally aligned if possible. 967 if (const ComplexType* CT = T->getAs<ComplexType>()) 968 T = CT->getElementType().getTypePtr(); 969 if (T->isSpecificBuiltinType(BuiltinType::Double) || 970 T->isSpecificBuiltinType(BuiltinType::LongLong)) 971 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 972 973 return ABIAlign; 974} 975 976/// ShallowCollectObjCIvars - 977/// Collect all ivars, including those synthesized, in the current class. 978/// 979void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 980 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) const { 981 // FIXME. This need be removed but there are two many places which 982 // assume const-ness of ObjCInterfaceDecl 983 ObjCInterfaceDecl *IDecl = const_cast<ObjCInterfaceDecl *>(OI); 984 for (ObjCIvarDecl *Iv = IDecl->all_declared_ivar_begin(); Iv; 985 Iv= Iv->getNextIvar()) 986 Ivars.push_back(Iv); 987} 988 989/// DeepCollectObjCIvars - 990/// This routine first collects all declared, but not synthesized, ivars in 991/// super class and then collects all ivars, including those synthesized for 992/// current class. This routine is used for implementation of current class 993/// when all ivars, declared and synthesized are known. 994/// 995void ASTContext::DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, 996 bool leafClass, 997 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) const { 998 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 999 DeepCollectObjCIvars(SuperClass, false, Ivars); 1000 if (!leafClass) { 1001 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 1002 E = OI->ivar_end(); I != E; ++I) 1003 Ivars.push_back(*I); 1004 } 1005 else 1006 ShallowCollectObjCIvars(OI, Ivars); 1007} 1008 1009/// CollectInheritedProtocols - Collect all protocols in current class and 1010/// those inherited by it. 1011void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 1012 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 1013 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 1014 // We can use protocol_iterator here instead of 1015 // all_referenced_protocol_iterator since we are walking all categories. 1016 for (ObjCInterfaceDecl::all_protocol_iterator P = OI->all_referenced_protocol_begin(), 1017 PE = OI->all_referenced_protocol_end(); P != PE; ++P) { 1018 ObjCProtocolDecl *Proto = (*P); 1019 Protocols.insert(Proto); 1020 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1021 PE = Proto->protocol_end(); P != PE; ++P) { 1022 Protocols.insert(*P); 1023 CollectInheritedProtocols(*P, Protocols); 1024 } 1025 } 1026 1027 // Categories of this Interface. 1028 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 1029 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 1030 CollectInheritedProtocols(CDeclChain, Protocols); 1031 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 1032 while (SD) { 1033 CollectInheritedProtocols(SD, Protocols); 1034 SD = SD->getSuperClass(); 1035 } 1036 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 1037 for (ObjCCategoryDecl::protocol_iterator P = OC->protocol_begin(), 1038 PE = OC->protocol_end(); P != PE; ++P) { 1039 ObjCProtocolDecl *Proto = (*P); 1040 Protocols.insert(Proto); 1041 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1042 PE = Proto->protocol_end(); P != PE; ++P) 1043 CollectInheritedProtocols(*P, Protocols); 1044 } 1045 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 1046 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 1047 PE = OP->protocol_end(); P != PE; ++P) { 1048 ObjCProtocolDecl *Proto = (*P); 1049 Protocols.insert(Proto); 1050 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1051 PE = Proto->protocol_end(); P != PE; ++P) 1052 CollectInheritedProtocols(*P, Protocols); 1053 } 1054 } 1055} 1056 1057unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) const { 1058 unsigned count = 0; 1059 // Count ivars declared in class extension. 1060 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl; 1061 CDecl = CDecl->getNextClassExtension()) 1062 count += CDecl->ivar_size(); 1063 1064 // Count ivar defined in this class's implementation. This 1065 // includes synthesized ivars. 1066 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 1067 count += ImplDecl->ivar_size(); 1068 1069 return count; 1070} 1071 1072/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1073ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 1074 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1075 I = ObjCImpls.find(D); 1076 if (I != ObjCImpls.end()) 1077 return cast<ObjCImplementationDecl>(I->second); 1078 return 0; 1079} 1080/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1081ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 1082 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1083 I = ObjCImpls.find(D); 1084 if (I != ObjCImpls.end()) 1085 return cast<ObjCCategoryImplDecl>(I->second); 1086 return 0; 1087} 1088 1089/// \brief Set the implementation of ObjCInterfaceDecl. 1090void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1091 ObjCImplementationDecl *ImplD) { 1092 assert(IFaceD && ImplD && "Passed null params"); 1093 ObjCImpls[IFaceD] = ImplD; 1094} 1095/// \brief Set the implementation of ObjCCategoryDecl. 1096void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 1097 ObjCCategoryImplDecl *ImplD) { 1098 assert(CatD && ImplD && "Passed null params"); 1099 ObjCImpls[CatD] = ImplD; 1100} 1101 1102/// \brief Get the copy initialization expression of VarDecl,or NULL if 1103/// none exists. 1104Expr *ASTContext::getBlockVarCopyInits(const VarDecl*VD) { 1105 assert(VD && "Passed null params"); 1106 assert(VD->hasAttr<BlocksAttr>() && 1107 "getBlockVarCopyInits - not __block var"); 1108 llvm::DenseMap<const VarDecl*, Expr*>::iterator 1109 I = BlockVarCopyInits.find(VD); 1110 return (I != BlockVarCopyInits.end()) ? cast<Expr>(I->second) : 0; 1111} 1112 1113/// \brief Set the copy inialization expression of a block var decl. 1114void ASTContext::setBlockVarCopyInits(VarDecl*VD, Expr* Init) { 1115 assert(VD && Init && "Passed null params"); 1116 assert(VD->hasAttr<BlocksAttr>() && 1117 "setBlockVarCopyInits - not __block var"); 1118 BlockVarCopyInits[VD] = Init; 1119} 1120 1121/// \brief Allocate an uninitialized TypeSourceInfo. 1122/// 1123/// The caller should initialize the memory held by TypeSourceInfo using 1124/// the TypeLoc wrappers. 1125/// 1126/// \param T the type that will be the basis for type source info. This type 1127/// should refer to how the declarator was written in source code, not to 1128/// what type semantic analysis resolved the declarator to. 1129TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 1130 unsigned DataSize) const { 1131 if (!DataSize) 1132 DataSize = TypeLoc::getFullDataSizeForType(T); 1133 else 1134 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 1135 "incorrect data size provided to CreateTypeSourceInfo!"); 1136 1137 TypeSourceInfo *TInfo = 1138 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 1139 new (TInfo) TypeSourceInfo(T); 1140 return TInfo; 1141} 1142 1143TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1144 SourceLocation L) const { 1145 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1146 DI->getTypeLoc().initialize(const_cast<ASTContext &>(*this), L); 1147 return DI; 1148} 1149 1150const ASTRecordLayout & 1151ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) const { 1152 return getObjCLayout(D, 0); 1153} 1154 1155const ASTRecordLayout & 1156ASTContext::getASTObjCImplementationLayout( 1157 const ObjCImplementationDecl *D) const { 1158 return getObjCLayout(D->getClassInterface(), D); 1159} 1160 1161//===----------------------------------------------------------------------===// 1162// Type creation/memoization methods 1163//===----------------------------------------------------------------------===// 1164 1165QualType 1166ASTContext::getExtQualType(const Type *baseType, Qualifiers quals) const { 1167 unsigned fastQuals = quals.getFastQualifiers(); 1168 quals.removeFastQualifiers(); 1169 1170 // Check if we've already instantiated this type. 1171 llvm::FoldingSetNodeID ID; 1172 ExtQuals::Profile(ID, baseType, quals); 1173 void *insertPos = 0; 1174 if (ExtQuals *eq = ExtQualNodes.FindNodeOrInsertPos(ID, insertPos)) { 1175 assert(eq->getQualifiers() == quals); 1176 return QualType(eq, fastQuals); 1177 } 1178 1179 // If the base type is not canonical, make the appropriate canonical type. 1180 QualType canon; 1181 if (!baseType->isCanonicalUnqualified()) { 1182 SplitQualType canonSplit = baseType->getCanonicalTypeInternal().split(); 1183 canonSplit.second.addConsistentQualifiers(quals); 1184 canon = getExtQualType(canonSplit.first, canonSplit.second); 1185 1186 // Re-find the insert position. 1187 (void) ExtQualNodes.FindNodeOrInsertPos(ID, insertPos); 1188 } 1189 1190 ExtQuals *eq = new (*this, TypeAlignment) ExtQuals(baseType, canon, quals); 1191 ExtQualNodes.InsertNode(eq, insertPos); 1192 return QualType(eq, fastQuals); 1193} 1194 1195QualType 1196ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) const { 1197 QualType CanT = getCanonicalType(T); 1198 if (CanT.getAddressSpace() == AddressSpace) 1199 return T; 1200 1201 // If we are composing extended qualifiers together, merge together 1202 // into one ExtQuals node. 1203 QualifierCollector Quals; 1204 const Type *TypeNode = Quals.strip(T); 1205 1206 // If this type already has an address space specified, it cannot get 1207 // another one. 1208 assert(!Quals.hasAddressSpace() && 1209 "Type cannot be in multiple addr spaces!"); 1210 Quals.addAddressSpace(AddressSpace); 1211 1212 return getExtQualType(TypeNode, Quals); 1213} 1214 1215QualType ASTContext::getObjCGCQualType(QualType T, 1216 Qualifiers::GC GCAttr) const { 1217 QualType CanT = getCanonicalType(T); 1218 if (CanT.getObjCGCAttr() == GCAttr) 1219 return T; 1220 1221 if (const PointerType *ptr = T->getAs<PointerType>()) { 1222 QualType Pointee = ptr->getPointeeType(); 1223 if (Pointee->isAnyPointerType()) { 1224 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1225 return getPointerType(ResultType); 1226 } 1227 } 1228 1229 // If we are composing extended qualifiers together, merge together 1230 // into one ExtQuals node. 1231 QualifierCollector Quals; 1232 const Type *TypeNode = Quals.strip(T); 1233 1234 // If this type already has an ObjCGC specified, it cannot get 1235 // another one. 1236 assert(!Quals.hasObjCGCAttr() && 1237 "Type cannot have multiple ObjCGCs!"); 1238 Quals.addObjCGCAttr(GCAttr); 1239 1240 return getExtQualType(TypeNode, Quals); 1241} 1242 1243const FunctionType *ASTContext::adjustFunctionType(const FunctionType *T, 1244 FunctionType::ExtInfo Info) { 1245 if (T->getExtInfo() == Info) 1246 return T; 1247 1248 QualType Result; 1249 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(T)) { 1250 Result = getFunctionNoProtoType(FNPT->getResultType(), Info); 1251 } else { 1252 const FunctionProtoType *FPT = cast<FunctionProtoType>(T); 1253 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 1254 EPI.ExtInfo = Info; 1255 Result = getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1256 FPT->getNumArgs(), EPI); 1257 } 1258 1259 return cast<FunctionType>(Result.getTypePtr()); 1260} 1261 1262/// getComplexType - Return the uniqued reference to the type for a complex 1263/// number with the specified element type. 1264QualType ASTContext::getComplexType(QualType T) const { 1265 // Unique pointers, to guarantee there is only one pointer of a particular 1266 // structure. 1267 llvm::FoldingSetNodeID ID; 1268 ComplexType::Profile(ID, T); 1269 1270 void *InsertPos = 0; 1271 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1272 return QualType(CT, 0); 1273 1274 // If the pointee type isn't canonical, this won't be a canonical type either, 1275 // so fill in the canonical type field. 1276 QualType Canonical; 1277 if (!T.isCanonical()) { 1278 Canonical = getComplexType(getCanonicalType(T)); 1279 1280 // Get the new insert position for the node we care about. 1281 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1282 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1283 } 1284 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1285 Types.push_back(New); 1286 ComplexTypes.InsertNode(New, InsertPos); 1287 return QualType(New, 0); 1288} 1289 1290/// getPointerType - Return the uniqued reference to the type for a pointer to 1291/// the specified type. 1292QualType ASTContext::getPointerType(QualType T) const { 1293 // Unique pointers, to guarantee there is only one pointer of a particular 1294 // structure. 1295 llvm::FoldingSetNodeID ID; 1296 PointerType::Profile(ID, T); 1297 1298 void *InsertPos = 0; 1299 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1300 return QualType(PT, 0); 1301 1302 // If the pointee type isn't canonical, this won't be a canonical type either, 1303 // so fill in the canonical type field. 1304 QualType Canonical; 1305 if (!T.isCanonical()) { 1306 Canonical = getPointerType(getCanonicalType(T)); 1307 1308 // Get the new insert position for the node we care about. 1309 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1310 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1311 } 1312 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1313 Types.push_back(New); 1314 PointerTypes.InsertNode(New, InsertPos); 1315 return QualType(New, 0); 1316} 1317 1318/// getBlockPointerType - Return the uniqued reference to the type for 1319/// a pointer to the specified block. 1320QualType ASTContext::getBlockPointerType(QualType T) const { 1321 assert(T->isFunctionType() && "block of function types only"); 1322 // Unique pointers, to guarantee there is only one block of a particular 1323 // structure. 1324 llvm::FoldingSetNodeID ID; 1325 BlockPointerType::Profile(ID, T); 1326 1327 void *InsertPos = 0; 1328 if (BlockPointerType *PT = 1329 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1330 return QualType(PT, 0); 1331 1332 // If the block pointee type isn't canonical, this won't be a canonical 1333 // type either so fill in the canonical type field. 1334 QualType Canonical; 1335 if (!T.isCanonical()) { 1336 Canonical = getBlockPointerType(getCanonicalType(T)); 1337 1338 // Get the new insert position for the node we care about. 1339 BlockPointerType *NewIP = 1340 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1341 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1342 } 1343 BlockPointerType *New 1344 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1345 Types.push_back(New); 1346 BlockPointerTypes.InsertNode(New, InsertPos); 1347 return QualType(New, 0); 1348} 1349 1350/// getLValueReferenceType - Return the uniqued reference to the type for an 1351/// lvalue reference to the specified type. 1352QualType 1353ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) const { 1354 // Unique pointers, to guarantee there is only one pointer of a particular 1355 // structure. 1356 llvm::FoldingSetNodeID ID; 1357 ReferenceType::Profile(ID, T, SpelledAsLValue); 1358 1359 void *InsertPos = 0; 1360 if (LValueReferenceType *RT = 1361 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1362 return QualType(RT, 0); 1363 1364 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1365 1366 // If the referencee type isn't canonical, this won't be a canonical type 1367 // either, so fill in the canonical type field. 1368 QualType Canonical; 1369 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1370 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1371 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1372 1373 // Get the new insert position for the node we care about. 1374 LValueReferenceType *NewIP = 1375 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1376 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1377 } 1378 1379 LValueReferenceType *New 1380 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1381 SpelledAsLValue); 1382 Types.push_back(New); 1383 LValueReferenceTypes.InsertNode(New, InsertPos); 1384 1385 return QualType(New, 0); 1386} 1387 1388/// getRValueReferenceType - Return the uniqued reference to the type for an 1389/// rvalue reference to the specified type. 1390QualType ASTContext::getRValueReferenceType(QualType T) const { 1391 // Unique pointers, to guarantee there is only one pointer of a particular 1392 // structure. 1393 llvm::FoldingSetNodeID ID; 1394 ReferenceType::Profile(ID, T, false); 1395 1396 void *InsertPos = 0; 1397 if (RValueReferenceType *RT = 1398 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1399 return QualType(RT, 0); 1400 1401 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1402 1403 // If the referencee type isn't canonical, this won't be a canonical type 1404 // either, so fill in the canonical type field. 1405 QualType Canonical; 1406 if (InnerRef || !T.isCanonical()) { 1407 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1408 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1409 1410 // Get the new insert position for the node we care about. 1411 RValueReferenceType *NewIP = 1412 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1413 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1414 } 1415 1416 RValueReferenceType *New 1417 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1418 Types.push_back(New); 1419 RValueReferenceTypes.InsertNode(New, InsertPos); 1420 return QualType(New, 0); 1421} 1422 1423/// getMemberPointerType - Return the uniqued reference to the type for a 1424/// member pointer to the specified type, in the specified class. 1425QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) const { 1426 // Unique pointers, to guarantee there is only one pointer of a particular 1427 // structure. 1428 llvm::FoldingSetNodeID ID; 1429 MemberPointerType::Profile(ID, T, Cls); 1430 1431 void *InsertPos = 0; 1432 if (MemberPointerType *PT = 1433 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1434 return QualType(PT, 0); 1435 1436 // If the pointee or class type isn't canonical, this won't be a canonical 1437 // type either, so fill in the canonical type field. 1438 QualType Canonical; 1439 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1440 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1441 1442 // Get the new insert position for the node we care about. 1443 MemberPointerType *NewIP = 1444 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1445 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1446 } 1447 MemberPointerType *New 1448 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1449 Types.push_back(New); 1450 MemberPointerTypes.InsertNode(New, InsertPos); 1451 return QualType(New, 0); 1452} 1453 1454/// getConstantArrayType - Return the unique reference to the type for an 1455/// array of the specified element type. 1456QualType ASTContext::getConstantArrayType(QualType EltTy, 1457 const llvm::APInt &ArySizeIn, 1458 ArrayType::ArraySizeModifier ASM, 1459 unsigned IndexTypeQuals) const { 1460 assert((EltTy->isDependentType() || 1461 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1462 "Constant array of VLAs is illegal!"); 1463 1464 // Convert the array size into a canonical width matching the pointer size for 1465 // the target. 1466 llvm::APInt ArySize(ArySizeIn); 1467 ArySize = 1468 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1469 1470 llvm::FoldingSetNodeID ID; 1471 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, IndexTypeQuals); 1472 1473 void *InsertPos = 0; 1474 if (ConstantArrayType *ATP = 1475 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1476 return QualType(ATP, 0); 1477 1478 // If the element type isn't canonical or has qualifiers, this won't 1479 // be a canonical type either, so fill in the canonical type field. 1480 QualType Canon; 1481 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1482 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1483 Canon = getConstantArrayType(QualType(canonSplit.first, 0), ArySize, 1484 ASM, IndexTypeQuals); 1485 Canon = getQualifiedType(Canon, canonSplit.second); 1486 1487 // Get the new insert position for the node we care about. 1488 ConstantArrayType *NewIP = 1489 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1490 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1491 } 1492 1493 ConstantArrayType *New = new(*this,TypeAlignment) 1494 ConstantArrayType(EltTy, Canon, ArySize, ASM, IndexTypeQuals); 1495 ConstantArrayTypes.InsertNode(New, InsertPos); 1496 Types.push_back(New); 1497 return QualType(New, 0); 1498} 1499 1500/// getVariableArrayDecayedType - Turns the given type, which may be 1501/// variably-modified, into the corresponding type with all the known 1502/// sizes replaced with [*]. 1503QualType ASTContext::getVariableArrayDecayedType(QualType type) const { 1504 // Vastly most common case. 1505 if (!type->isVariablyModifiedType()) return type; 1506 1507 QualType result; 1508 1509 SplitQualType split = type.getSplitDesugaredType(); 1510 const Type *ty = split.first; 1511 switch (ty->getTypeClass()) { 1512#define TYPE(Class, Base) 1513#define ABSTRACT_TYPE(Class, Base) 1514#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 1515#include "clang/AST/TypeNodes.def" 1516 llvm_unreachable("didn't desugar past all non-canonical types?"); 1517 1518 // These types should never be variably-modified. 1519 case Type::Builtin: 1520 case Type::Complex: 1521 case Type::Vector: 1522 case Type::ExtVector: 1523 case Type::DependentSizedExtVector: 1524 case Type::ObjCObject: 1525 case Type::ObjCInterface: 1526 case Type::ObjCObjectPointer: 1527 case Type::Record: 1528 case Type::Enum: 1529 case Type::UnresolvedUsing: 1530 case Type::TypeOfExpr: 1531 case Type::TypeOf: 1532 case Type::Decltype: 1533 case Type::DependentName: 1534 case Type::InjectedClassName: 1535 case Type::TemplateSpecialization: 1536 case Type::DependentTemplateSpecialization: 1537 case Type::TemplateTypeParm: 1538 case Type::SubstTemplateTypeParmPack: 1539 case Type::Auto: 1540 case Type::PackExpansion: 1541 llvm_unreachable("type should never be variably-modified"); 1542 1543 // These types can be variably-modified but should never need to 1544 // further decay. 1545 case Type::FunctionNoProto: 1546 case Type::FunctionProto: 1547 case Type::BlockPointer: 1548 case Type::MemberPointer: 1549 return type; 1550 1551 // These types can be variably-modified. All these modifications 1552 // preserve structure except as noted by comments. 1553 // TODO: if we ever care about optimizing VLAs, there are no-op 1554 // optimizations available here. 1555 case Type::Pointer: 1556 result = getPointerType(getVariableArrayDecayedType( 1557 cast<PointerType>(ty)->getPointeeType())); 1558 break; 1559 1560 case Type::LValueReference: { 1561 const LValueReferenceType *lv = cast<LValueReferenceType>(ty); 1562 result = getLValueReferenceType( 1563 getVariableArrayDecayedType(lv->getPointeeType()), 1564 lv->isSpelledAsLValue()); 1565 break; 1566 } 1567 1568 case Type::RValueReference: { 1569 const RValueReferenceType *lv = cast<RValueReferenceType>(ty); 1570 result = getRValueReferenceType( 1571 getVariableArrayDecayedType(lv->getPointeeType())); 1572 break; 1573 } 1574 1575 case Type::ConstantArray: { 1576 const ConstantArrayType *cat = cast<ConstantArrayType>(ty); 1577 result = getConstantArrayType( 1578 getVariableArrayDecayedType(cat->getElementType()), 1579 cat->getSize(), 1580 cat->getSizeModifier(), 1581 cat->getIndexTypeCVRQualifiers()); 1582 break; 1583 } 1584 1585 case Type::DependentSizedArray: { 1586 const DependentSizedArrayType *dat = cast<DependentSizedArrayType>(ty); 1587 result = getDependentSizedArrayType( 1588 getVariableArrayDecayedType(dat->getElementType()), 1589 dat->getSizeExpr(), 1590 dat->getSizeModifier(), 1591 dat->getIndexTypeCVRQualifiers(), 1592 dat->getBracketsRange()); 1593 break; 1594 } 1595 1596 // Turn incomplete types into [*] types. 1597 case Type::IncompleteArray: { 1598 const IncompleteArrayType *iat = cast<IncompleteArrayType>(ty); 1599 result = getVariableArrayType( 1600 getVariableArrayDecayedType(iat->getElementType()), 1601 /*size*/ 0, 1602 ArrayType::Normal, 1603 iat->getIndexTypeCVRQualifiers(), 1604 SourceRange()); 1605 break; 1606 } 1607 1608 // Turn VLA types into [*] types. 1609 case Type::VariableArray: { 1610 const VariableArrayType *vat = cast<VariableArrayType>(ty); 1611 result = getVariableArrayType( 1612 getVariableArrayDecayedType(vat->getElementType()), 1613 /*size*/ 0, 1614 ArrayType::Star, 1615 vat->getIndexTypeCVRQualifiers(), 1616 vat->getBracketsRange()); 1617 break; 1618 } 1619 } 1620 1621 // Apply the top-level qualifiers from the original. 1622 return getQualifiedType(result, split.second); 1623} 1624 1625/// getVariableArrayType - Returns a non-unique reference to the type for a 1626/// variable array of the specified element type. 1627QualType ASTContext::getVariableArrayType(QualType EltTy, 1628 Expr *NumElts, 1629 ArrayType::ArraySizeModifier ASM, 1630 unsigned IndexTypeQuals, 1631 SourceRange Brackets) const { 1632 // Since we don't unique expressions, it isn't possible to unique VLA's 1633 // that have an expression provided for their size. 1634 QualType Canon; 1635 1636 // Be sure to pull qualifiers off the element type. 1637 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1638 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1639 Canon = getVariableArrayType(QualType(canonSplit.first, 0), NumElts, ASM, 1640 IndexTypeQuals, Brackets); 1641 Canon = getQualifiedType(Canon, canonSplit.second); 1642 } 1643 1644 VariableArrayType *New = new(*this, TypeAlignment) 1645 VariableArrayType(EltTy, Canon, NumElts, ASM, IndexTypeQuals, Brackets); 1646 1647 VariableArrayTypes.push_back(New); 1648 Types.push_back(New); 1649 return QualType(New, 0); 1650} 1651 1652/// getDependentSizedArrayType - Returns a non-unique reference to 1653/// the type for a dependently-sized array of the specified element 1654/// type. 1655QualType ASTContext::getDependentSizedArrayType(QualType elementType, 1656 Expr *numElements, 1657 ArrayType::ArraySizeModifier ASM, 1658 unsigned elementTypeQuals, 1659 SourceRange brackets) const { 1660 assert((!numElements || numElements->isTypeDependent() || 1661 numElements->isValueDependent()) && 1662 "Size must be type- or value-dependent!"); 1663 1664 // Dependently-sized array types that do not have a specified number 1665 // of elements will have their sizes deduced from a dependent 1666 // initializer. We do no canonicalization here at all, which is okay 1667 // because they can't be used in most locations. 1668 if (!numElements) { 1669 DependentSizedArrayType *newType 1670 = new (*this, TypeAlignment) 1671 DependentSizedArrayType(*this, elementType, QualType(), 1672 numElements, ASM, elementTypeQuals, 1673 brackets); 1674 Types.push_back(newType); 1675 return QualType(newType, 0); 1676 } 1677 1678 // Otherwise, we actually build a new type every time, but we 1679 // also build a canonical type. 1680 1681 SplitQualType canonElementType = getCanonicalType(elementType).split(); 1682 1683 void *insertPos = 0; 1684 llvm::FoldingSetNodeID ID; 1685 DependentSizedArrayType::Profile(ID, *this, 1686 QualType(canonElementType.first, 0), 1687 ASM, elementTypeQuals, numElements); 1688 1689 // Look for an existing type with these properties. 1690 DependentSizedArrayType *canonTy = 1691 DependentSizedArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1692 1693 // If we don't have one, build one. 1694 if (!canonTy) { 1695 canonTy = new (*this, TypeAlignment) 1696 DependentSizedArrayType(*this, QualType(canonElementType.first, 0), 1697 QualType(), numElements, ASM, elementTypeQuals, 1698 brackets); 1699 DependentSizedArrayTypes.InsertNode(canonTy, insertPos); 1700 Types.push_back(canonTy); 1701 } 1702 1703 // Apply qualifiers from the element type to the array. 1704 QualType canon = getQualifiedType(QualType(canonTy,0), 1705 canonElementType.second); 1706 1707 // If we didn't need extra canonicalization for the element type, 1708 // then just use that as our result. 1709 if (QualType(canonElementType.first, 0) == elementType) 1710 return canon; 1711 1712 // Otherwise, we need to build a type which follows the spelling 1713 // of the element type. 1714 DependentSizedArrayType *sugaredType 1715 = new (*this, TypeAlignment) 1716 DependentSizedArrayType(*this, elementType, canon, numElements, 1717 ASM, elementTypeQuals, brackets); 1718 Types.push_back(sugaredType); 1719 return QualType(sugaredType, 0); 1720} 1721 1722QualType ASTContext::getIncompleteArrayType(QualType elementType, 1723 ArrayType::ArraySizeModifier ASM, 1724 unsigned elementTypeQuals) const { 1725 llvm::FoldingSetNodeID ID; 1726 IncompleteArrayType::Profile(ID, elementType, ASM, elementTypeQuals); 1727 1728 void *insertPos = 0; 1729 if (IncompleteArrayType *iat = 1730 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos)) 1731 return QualType(iat, 0); 1732 1733 // If the element type isn't canonical, this won't be a canonical type 1734 // either, so fill in the canonical type field. We also have to pull 1735 // qualifiers off the element type. 1736 QualType canon; 1737 1738 if (!elementType.isCanonical() || elementType.hasLocalQualifiers()) { 1739 SplitQualType canonSplit = getCanonicalType(elementType).split(); 1740 canon = getIncompleteArrayType(QualType(canonSplit.first, 0), 1741 ASM, elementTypeQuals); 1742 canon = getQualifiedType(canon, canonSplit.second); 1743 1744 // Get the new insert position for the node we care about. 1745 IncompleteArrayType *existing = 1746 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1747 assert(!existing && "Shouldn't be in the map!"); (void) existing; 1748 } 1749 1750 IncompleteArrayType *newType = new (*this, TypeAlignment) 1751 IncompleteArrayType(elementType, canon, ASM, elementTypeQuals); 1752 1753 IncompleteArrayTypes.InsertNode(newType, insertPos); 1754 Types.push_back(newType); 1755 return QualType(newType, 0); 1756} 1757 1758/// getVectorType - Return the unique reference to a vector type of 1759/// the specified element type and size. VectorType must be a built-in type. 1760QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1761 VectorType::VectorKind VecKind) const { 1762 assert(vecType->isBuiltinType()); 1763 1764 // Check if we've already instantiated a vector of this type. 1765 llvm::FoldingSetNodeID ID; 1766 VectorType::Profile(ID, vecType, NumElts, Type::Vector, VecKind); 1767 1768 void *InsertPos = 0; 1769 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1770 return QualType(VTP, 0); 1771 1772 // If the element type isn't canonical, this won't be a canonical type either, 1773 // so fill in the canonical type field. 1774 QualType Canonical; 1775 if (!vecType.isCanonical()) { 1776 Canonical = getVectorType(getCanonicalType(vecType), NumElts, VecKind); 1777 1778 // Get the new insert position for the node we care about. 1779 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1780 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1781 } 1782 VectorType *New = new (*this, TypeAlignment) 1783 VectorType(vecType, NumElts, Canonical, VecKind); 1784 VectorTypes.InsertNode(New, InsertPos); 1785 Types.push_back(New); 1786 return QualType(New, 0); 1787} 1788 1789/// getExtVectorType - Return the unique reference to an extended vector type of 1790/// the specified element type and size. VectorType must be a built-in type. 1791QualType 1792ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) const { 1793 assert(vecType->isBuiltinType()); 1794 1795 // Check if we've already instantiated a vector of this type. 1796 llvm::FoldingSetNodeID ID; 1797 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, 1798 VectorType::GenericVector); 1799 void *InsertPos = 0; 1800 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1801 return QualType(VTP, 0); 1802 1803 // If the element type isn't canonical, this won't be a canonical type either, 1804 // so fill in the canonical type field. 1805 QualType Canonical; 1806 if (!vecType.isCanonical()) { 1807 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1808 1809 // Get the new insert position for the node we care about. 1810 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1811 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1812 } 1813 ExtVectorType *New = new (*this, TypeAlignment) 1814 ExtVectorType(vecType, NumElts, Canonical); 1815 VectorTypes.InsertNode(New, InsertPos); 1816 Types.push_back(New); 1817 return QualType(New, 0); 1818} 1819 1820QualType 1821ASTContext::getDependentSizedExtVectorType(QualType vecType, 1822 Expr *SizeExpr, 1823 SourceLocation AttrLoc) const { 1824 llvm::FoldingSetNodeID ID; 1825 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1826 SizeExpr); 1827 1828 void *InsertPos = 0; 1829 DependentSizedExtVectorType *Canon 1830 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1831 DependentSizedExtVectorType *New; 1832 if (Canon) { 1833 // We already have a canonical version of this array type; use it as 1834 // the canonical type for a newly-built type. 1835 New = new (*this, TypeAlignment) 1836 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1837 SizeExpr, AttrLoc); 1838 } else { 1839 QualType CanonVecTy = getCanonicalType(vecType); 1840 if (CanonVecTy == vecType) { 1841 New = new (*this, TypeAlignment) 1842 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1843 AttrLoc); 1844 1845 DependentSizedExtVectorType *CanonCheck 1846 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1847 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1848 (void)CanonCheck; 1849 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1850 } else { 1851 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1852 SourceLocation()); 1853 New = new (*this, TypeAlignment) 1854 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1855 } 1856 } 1857 1858 Types.push_back(New); 1859 return QualType(New, 0); 1860} 1861 1862/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1863/// 1864QualType 1865ASTContext::getFunctionNoProtoType(QualType ResultTy, 1866 const FunctionType::ExtInfo &Info) const { 1867 const CallingConv DefaultCC = Info.getCC(); 1868 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 1869 CC_X86StdCall : DefaultCC; 1870 // Unique functions, to guarantee there is only one function of a particular 1871 // structure. 1872 llvm::FoldingSetNodeID ID; 1873 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1874 1875 void *InsertPos = 0; 1876 if (FunctionNoProtoType *FT = 1877 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1878 return QualType(FT, 0); 1879 1880 QualType Canonical; 1881 if (!ResultTy.isCanonical() || 1882 getCanonicalCallConv(CallConv) != CallConv) { 1883 Canonical = 1884 getFunctionNoProtoType(getCanonicalType(ResultTy), 1885 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1886 1887 // Get the new insert position for the node we care about. 1888 FunctionNoProtoType *NewIP = 1889 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1890 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1891 } 1892 1893 FunctionProtoType::ExtInfo newInfo = Info.withCallingConv(CallConv); 1894 FunctionNoProtoType *New = new (*this, TypeAlignment) 1895 FunctionNoProtoType(ResultTy, Canonical, newInfo); 1896 Types.push_back(New); 1897 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1898 return QualType(New, 0); 1899} 1900 1901/// getFunctionType - Return a normal function type with a typed argument 1902/// list. isVariadic indicates whether the argument list includes '...'. 1903QualType 1904ASTContext::getFunctionType(QualType ResultTy, 1905 const QualType *ArgArray, unsigned NumArgs, 1906 const FunctionProtoType::ExtProtoInfo &EPI) const { 1907 // Unique functions, to guarantee there is only one function of a particular 1908 // structure. 1909 llvm::FoldingSetNodeID ID; 1910 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, EPI); 1911 1912 void *InsertPos = 0; 1913 if (FunctionProtoType *FTP = 1914 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1915 return QualType(FTP, 0); 1916 1917 // Determine whether the type being created is already canonical or not. 1918 bool isCanonical= EPI.ExceptionSpecType == EST_None && ResultTy.isCanonical(); 1919 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1920 if (!ArgArray[i].isCanonicalAsParam()) 1921 isCanonical = false; 1922 1923 const CallingConv DefaultCC = EPI.ExtInfo.getCC(); 1924 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 1925 CC_X86StdCall : DefaultCC; 1926 1927 // If this type isn't canonical, get the canonical version of it. 1928 // The exception spec is not part of the canonical type. 1929 QualType Canonical; 1930 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1931 llvm::SmallVector<QualType, 16> CanonicalArgs; 1932 CanonicalArgs.reserve(NumArgs); 1933 for (unsigned i = 0; i != NumArgs; ++i) 1934 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1935 1936 FunctionProtoType::ExtProtoInfo CanonicalEPI = EPI; 1937 CanonicalEPI.ExceptionSpecType = EST_None; 1938 CanonicalEPI.NumExceptions = 0; 1939 CanonicalEPI.ExtInfo 1940 = CanonicalEPI.ExtInfo.withCallingConv(getCanonicalCallConv(CallConv)); 1941 1942 Canonical = getFunctionType(getCanonicalType(ResultTy), 1943 CanonicalArgs.data(), NumArgs, 1944 CanonicalEPI); 1945 1946 // Get the new insert position for the node we care about. 1947 FunctionProtoType *NewIP = 1948 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1949 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1950 } 1951 1952 // FunctionProtoType objects are allocated with extra bytes after them 1953 // for two variable size arrays (for parameter and exception types) at the 1954 // end of them. 1955 size_t Size = sizeof(FunctionProtoType) + 1956 NumArgs * sizeof(QualType) + 1957 EPI.NumExceptions * sizeof(QualType); 1958 FunctionProtoType *FTP = (FunctionProtoType*) Allocate(Size, TypeAlignment); 1959 FunctionProtoType::ExtProtoInfo newEPI = EPI; 1960 newEPI.ExtInfo = EPI.ExtInfo.withCallingConv(CallConv); 1961 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, Canonical, newEPI); 1962 Types.push_back(FTP); 1963 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1964 return QualType(FTP, 0); 1965} 1966 1967#ifndef NDEBUG 1968static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1969 if (!isa<CXXRecordDecl>(D)) return false; 1970 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1971 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1972 return true; 1973 if (RD->getDescribedClassTemplate() && 1974 !isa<ClassTemplateSpecializationDecl>(RD)) 1975 return true; 1976 return false; 1977} 1978#endif 1979 1980/// getInjectedClassNameType - Return the unique reference to the 1981/// injected class name type for the specified templated declaration. 1982QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1983 QualType TST) const { 1984 assert(NeedsInjectedClassNameType(Decl)); 1985 if (Decl->TypeForDecl) { 1986 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1987 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDeclaration()) { 1988 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1989 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1990 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1991 } else { 1992 Type *newType = 1993 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 1994 Decl->TypeForDecl = newType; 1995 Types.push_back(newType); 1996 } 1997 return QualType(Decl->TypeForDecl, 0); 1998} 1999 2000/// getTypeDeclType - Return the unique reference to the type for the 2001/// specified type declaration. 2002QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) const { 2003 assert(Decl && "Passed null for Decl param"); 2004 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 2005 2006 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 2007 return getTypedefType(Typedef); 2008 2009 assert(!isa<TemplateTypeParmDecl>(Decl) && 2010 "Template type parameter types are always available."); 2011 2012 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 2013 assert(!Record->getPreviousDeclaration() && 2014 "struct/union has previous declaration"); 2015 assert(!NeedsInjectedClassNameType(Record)); 2016 return getRecordType(Record); 2017 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 2018 assert(!Enum->getPreviousDeclaration() && 2019 "enum has previous declaration"); 2020 return getEnumType(Enum); 2021 } else if (const UnresolvedUsingTypenameDecl *Using = 2022 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 2023 Type *newType = new (*this, TypeAlignment) UnresolvedUsingType(Using); 2024 Decl->TypeForDecl = newType; 2025 Types.push_back(newType); 2026 } else 2027 llvm_unreachable("TypeDecl without a type?"); 2028 2029 return QualType(Decl->TypeForDecl, 0); 2030} 2031 2032/// getTypedefType - Return the unique reference to the type for the 2033/// specified typename decl. 2034QualType 2035ASTContext::getTypedefType(const TypedefDecl *Decl, QualType Canonical) const { 2036 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2037 2038 if (Canonical.isNull()) 2039 Canonical = getCanonicalType(Decl->getUnderlyingType()); 2040 TypedefType *newType = new(*this, TypeAlignment) 2041 TypedefType(Type::Typedef, Decl, Canonical); 2042 Decl->TypeForDecl = newType; 2043 Types.push_back(newType); 2044 return QualType(newType, 0); 2045} 2046 2047QualType ASTContext::getRecordType(const RecordDecl *Decl) const { 2048 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2049 2050 if (const RecordDecl *PrevDecl = Decl->getPreviousDeclaration()) 2051 if (PrevDecl->TypeForDecl) 2052 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2053 2054 RecordType *newType = new (*this, TypeAlignment) RecordType(Decl); 2055 Decl->TypeForDecl = newType; 2056 Types.push_back(newType); 2057 return QualType(newType, 0); 2058} 2059 2060QualType ASTContext::getEnumType(const EnumDecl *Decl) const { 2061 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2062 2063 if (const EnumDecl *PrevDecl = Decl->getPreviousDeclaration()) 2064 if (PrevDecl->TypeForDecl) 2065 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2066 2067 EnumType *newType = new (*this, TypeAlignment) EnumType(Decl); 2068 Decl->TypeForDecl = newType; 2069 Types.push_back(newType); 2070 return QualType(newType, 0); 2071} 2072 2073QualType ASTContext::getAttributedType(AttributedType::Kind attrKind, 2074 QualType modifiedType, 2075 QualType equivalentType) { 2076 llvm::FoldingSetNodeID id; 2077 AttributedType::Profile(id, attrKind, modifiedType, equivalentType); 2078 2079 void *insertPos = 0; 2080 AttributedType *type = AttributedTypes.FindNodeOrInsertPos(id, insertPos); 2081 if (type) return QualType(type, 0); 2082 2083 QualType canon = getCanonicalType(equivalentType); 2084 type = new (*this, TypeAlignment) 2085 AttributedType(canon, attrKind, modifiedType, equivalentType); 2086 2087 Types.push_back(type); 2088 AttributedTypes.InsertNode(type, insertPos); 2089 2090 return QualType(type, 0); 2091} 2092 2093 2094/// \brief Retrieve a substitution-result type. 2095QualType 2096ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 2097 QualType Replacement) const { 2098 assert(Replacement.isCanonical() 2099 && "replacement types must always be canonical"); 2100 2101 llvm::FoldingSetNodeID ID; 2102 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 2103 void *InsertPos = 0; 2104 SubstTemplateTypeParmType *SubstParm 2105 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2106 2107 if (!SubstParm) { 2108 SubstParm = new (*this, TypeAlignment) 2109 SubstTemplateTypeParmType(Parm, Replacement); 2110 Types.push_back(SubstParm); 2111 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2112 } 2113 2114 return QualType(SubstParm, 0); 2115} 2116 2117/// \brief Retrieve a 2118QualType ASTContext::getSubstTemplateTypeParmPackType( 2119 const TemplateTypeParmType *Parm, 2120 const TemplateArgument &ArgPack) { 2121#ifndef NDEBUG 2122 for (TemplateArgument::pack_iterator P = ArgPack.pack_begin(), 2123 PEnd = ArgPack.pack_end(); 2124 P != PEnd; ++P) { 2125 assert(P->getKind() == TemplateArgument::Type &&"Pack contains a non-type"); 2126 assert(P->getAsType().isCanonical() && "Pack contains non-canonical type"); 2127 } 2128#endif 2129 2130 llvm::FoldingSetNodeID ID; 2131 SubstTemplateTypeParmPackType::Profile(ID, Parm, ArgPack); 2132 void *InsertPos = 0; 2133 if (SubstTemplateTypeParmPackType *SubstParm 2134 = SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos)) 2135 return QualType(SubstParm, 0); 2136 2137 QualType Canon; 2138 if (!Parm->isCanonicalUnqualified()) { 2139 Canon = getCanonicalType(QualType(Parm, 0)); 2140 Canon = getSubstTemplateTypeParmPackType(cast<TemplateTypeParmType>(Canon), 2141 ArgPack); 2142 SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos); 2143 } 2144 2145 SubstTemplateTypeParmPackType *SubstParm 2146 = new (*this, TypeAlignment) SubstTemplateTypeParmPackType(Parm, Canon, 2147 ArgPack); 2148 Types.push_back(SubstParm); 2149 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2150 return QualType(SubstParm, 0); 2151} 2152 2153/// \brief Retrieve the template type parameter type for a template 2154/// parameter or parameter pack with the given depth, index, and (optionally) 2155/// name. 2156QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 2157 bool ParameterPack, 2158 IdentifierInfo *Name) const { 2159 llvm::FoldingSetNodeID ID; 2160 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 2161 void *InsertPos = 0; 2162 TemplateTypeParmType *TypeParm 2163 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2164 2165 if (TypeParm) 2166 return QualType(TypeParm, 0); 2167 2168 if (Name) { 2169 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 2170 TypeParm = new (*this, TypeAlignment) 2171 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 2172 2173 TemplateTypeParmType *TypeCheck 2174 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2175 assert(!TypeCheck && "Template type parameter canonical type broken"); 2176 (void)TypeCheck; 2177 } else 2178 TypeParm = new (*this, TypeAlignment) 2179 TemplateTypeParmType(Depth, Index, ParameterPack); 2180 2181 Types.push_back(TypeParm); 2182 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 2183 2184 return QualType(TypeParm, 0); 2185} 2186 2187TypeSourceInfo * 2188ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 2189 SourceLocation NameLoc, 2190 const TemplateArgumentListInfo &Args, 2191 QualType CanonType) const { 2192 assert(!Name.getAsDependentTemplateName() && 2193 "No dependent template names here!"); 2194 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 2195 2196 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 2197 TemplateSpecializationTypeLoc TL 2198 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 2199 TL.setTemplateNameLoc(NameLoc); 2200 TL.setLAngleLoc(Args.getLAngleLoc()); 2201 TL.setRAngleLoc(Args.getRAngleLoc()); 2202 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 2203 TL.setArgLocInfo(i, Args[i].getLocInfo()); 2204 return DI; 2205} 2206 2207QualType 2208ASTContext::getTemplateSpecializationType(TemplateName Template, 2209 const TemplateArgumentListInfo &Args, 2210 QualType Canon) const { 2211 assert(!Template.getAsDependentTemplateName() && 2212 "No dependent template names here!"); 2213 2214 unsigned NumArgs = Args.size(); 2215 2216 llvm::SmallVector<TemplateArgument, 4> ArgVec; 2217 ArgVec.reserve(NumArgs); 2218 for (unsigned i = 0; i != NumArgs; ++i) 2219 ArgVec.push_back(Args[i].getArgument()); 2220 2221 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 2222 Canon); 2223} 2224 2225QualType 2226ASTContext::getTemplateSpecializationType(TemplateName Template, 2227 const TemplateArgument *Args, 2228 unsigned NumArgs, 2229 QualType Canon) const { 2230 assert(!Template.getAsDependentTemplateName() && 2231 "No dependent template names here!"); 2232 // Look through qualified template names. 2233 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2234 Template = TemplateName(QTN->getTemplateDecl()); 2235 2236 if (!Canon.isNull()) 2237 Canon = getCanonicalType(Canon); 2238 else 2239 Canon = getCanonicalTemplateSpecializationType(Template, Args, NumArgs); 2240 2241 // Allocate the (non-canonical) template specialization type, but don't 2242 // try to unique it: these types typically have location information that 2243 // we don't unique and don't want to lose. 2244 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2245 sizeof(TemplateArgument) * NumArgs), 2246 TypeAlignment); 2247 TemplateSpecializationType *Spec 2248 = new (Mem) TemplateSpecializationType(Template, 2249 Args, NumArgs, 2250 Canon); 2251 2252 Types.push_back(Spec); 2253 return QualType(Spec, 0); 2254} 2255 2256QualType 2257ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template, 2258 const TemplateArgument *Args, 2259 unsigned NumArgs) const { 2260 assert(!Template.getAsDependentTemplateName() && 2261 "No dependent template names here!"); 2262 // Look through qualified template names. 2263 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2264 Template = TemplateName(QTN->getTemplateDecl()); 2265 2266 // Build the canonical template specialization type. 2267 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 2268 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 2269 CanonArgs.reserve(NumArgs); 2270 for (unsigned I = 0; I != NumArgs; ++I) 2271 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 2272 2273 // Determine whether this canonical template specialization type already 2274 // exists. 2275 llvm::FoldingSetNodeID ID; 2276 TemplateSpecializationType::Profile(ID, CanonTemplate, 2277 CanonArgs.data(), NumArgs, *this); 2278 2279 void *InsertPos = 0; 2280 TemplateSpecializationType *Spec 2281 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2282 2283 if (!Spec) { 2284 // Allocate a new canonical template specialization type. 2285 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2286 sizeof(TemplateArgument) * NumArgs), 2287 TypeAlignment); 2288 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 2289 CanonArgs.data(), NumArgs, 2290 QualType()); 2291 Types.push_back(Spec); 2292 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 2293 } 2294 2295 assert(Spec->isDependentType() && 2296 "Non-dependent template-id type must have a canonical type"); 2297 return QualType(Spec, 0); 2298} 2299 2300QualType 2301ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 2302 NestedNameSpecifier *NNS, 2303 QualType NamedType) const { 2304 llvm::FoldingSetNodeID ID; 2305 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 2306 2307 void *InsertPos = 0; 2308 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2309 if (T) 2310 return QualType(T, 0); 2311 2312 QualType Canon = NamedType; 2313 if (!Canon.isCanonical()) { 2314 Canon = getCanonicalType(NamedType); 2315 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2316 assert(!CheckT && "Elaborated canonical type broken"); 2317 (void)CheckT; 2318 } 2319 2320 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 2321 Types.push_back(T); 2322 ElaboratedTypes.InsertNode(T, InsertPos); 2323 return QualType(T, 0); 2324} 2325 2326QualType 2327ASTContext::getParenType(QualType InnerType) const { 2328 llvm::FoldingSetNodeID ID; 2329 ParenType::Profile(ID, InnerType); 2330 2331 void *InsertPos = 0; 2332 ParenType *T = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2333 if (T) 2334 return QualType(T, 0); 2335 2336 QualType Canon = InnerType; 2337 if (!Canon.isCanonical()) { 2338 Canon = getCanonicalType(InnerType); 2339 ParenType *CheckT = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2340 assert(!CheckT && "Paren canonical type broken"); 2341 (void)CheckT; 2342 } 2343 2344 T = new (*this) ParenType(InnerType, Canon); 2345 Types.push_back(T); 2346 ParenTypes.InsertNode(T, InsertPos); 2347 return QualType(T, 0); 2348} 2349 2350QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 2351 NestedNameSpecifier *NNS, 2352 const IdentifierInfo *Name, 2353 QualType Canon) const { 2354 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2355 2356 if (Canon.isNull()) { 2357 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2358 ElaboratedTypeKeyword CanonKeyword = Keyword; 2359 if (Keyword == ETK_None) 2360 CanonKeyword = ETK_Typename; 2361 2362 if (CanonNNS != NNS || CanonKeyword != Keyword) 2363 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 2364 } 2365 2366 llvm::FoldingSetNodeID ID; 2367 DependentNameType::Profile(ID, Keyword, NNS, Name); 2368 2369 void *InsertPos = 0; 2370 DependentNameType *T 2371 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2372 if (T) 2373 return QualType(T, 0); 2374 2375 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 2376 Types.push_back(T); 2377 DependentNameTypes.InsertNode(T, InsertPos); 2378 return QualType(T, 0); 2379} 2380 2381QualType 2382ASTContext::getDependentTemplateSpecializationType( 2383 ElaboratedTypeKeyword Keyword, 2384 NestedNameSpecifier *NNS, 2385 const IdentifierInfo *Name, 2386 const TemplateArgumentListInfo &Args) const { 2387 // TODO: avoid this copy 2388 llvm::SmallVector<TemplateArgument, 16> ArgCopy; 2389 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2390 ArgCopy.push_back(Args[I].getArgument()); 2391 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2392 ArgCopy.size(), 2393 ArgCopy.data()); 2394} 2395 2396QualType 2397ASTContext::getDependentTemplateSpecializationType( 2398 ElaboratedTypeKeyword Keyword, 2399 NestedNameSpecifier *NNS, 2400 const IdentifierInfo *Name, 2401 unsigned NumArgs, 2402 const TemplateArgument *Args) const { 2403 assert((!NNS || NNS->isDependent()) && 2404 "nested-name-specifier must be dependent"); 2405 2406 llvm::FoldingSetNodeID ID; 2407 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2408 Name, NumArgs, Args); 2409 2410 void *InsertPos = 0; 2411 DependentTemplateSpecializationType *T 2412 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2413 if (T) 2414 return QualType(T, 0); 2415 2416 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2417 2418 ElaboratedTypeKeyword CanonKeyword = Keyword; 2419 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2420 2421 bool AnyNonCanonArgs = false; 2422 llvm::SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2423 for (unsigned I = 0; I != NumArgs; ++I) { 2424 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2425 if (!CanonArgs[I].structurallyEquals(Args[I])) 2426 AnyNonCanonArgs = true; 2427 } 2428 2429 QualType Canon; 2430 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2431 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2432 Name, NumArgs, 2433 CanonArgs.data()); 2434 2435 // Find the insert position again. 2436 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2437 } 2438 2439 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2440 sizeof(TemplateArgument) * NumArgs), 2441 TypeAlignment); 2442 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2443 Name, NumArgs, Args, Canon); 2444 Types.push_back(T); 2445 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2446 return QualType(T, 0); 2447} 2448 2449QualType ASTContext::getPackExpansionType(QualType Pattern, 2450 llvm::Optional<unsigned> NumExpansions) { 2451 llvm::FoldingSetNodeID ID; 2452 PackExpansionType::Profile(ID, Pattern, NumExpansions); 2453 2454 assert(Pattern->containsUnexpandedParameterPack() && 2455 "Pack expansions must expand one or more parameter packs"); 2456 void *InsertPos = 0; 2457 PackExpansionType *T 2458 = PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2459 if (T) 2460 return QualType(T, 0); 2461 2462 QualType Canon; 2463 if (!Pattern.isCanonical()) { 2464 Canon = getPackExpansionType(getCanonicalType(Pattern), NumExpansions); 2465 2466 // Find the insert position again. 2467 PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2468 } 2469 2470 T = new (*this) PackExpansionType(Pattern, Canon, NumExpansions); 2471 Types.push_back(T); 2472 PackExpansionTypes.InsertNode(T, InsertPos); 2473 return QualType(T, 0); 2474} 2475 2476/// CmpProtocolNames - Comparison predicate for sorting protocols 2477/// alphabetically. 2478static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2479 const ObjCProtocolDecl *RHS) { 2480 return LHS->getDeclName() < RHS->getDeclName(); 2481} 2482 2483static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2484 unsigned NumProtocols) { 2485 if (NumProtocols == 0) return true; 2486 2487 for (unsigned i = 1; i != NumProtocols; ++i) 2488 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2489 return false; 2490 return true; 2491} 2492 2493static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2494 unsigned &NumProtocols) { 2495 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2496 2497 // Sort protocols, keyed by name. 2498 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2499 2500 // Remove duplicates. 2501 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2502 NumProtocols = ProtocolsEnd-Protocols; 2503} 2504 2505QualType ASTContext::getObjCObjectType(QualType BaseType, 2506 ObjCProtocolDecl * const *Protocols, 2507 unsigned NumProtocols) const { 2508 // If the base type is an interface and there aren't any protocols 2509 // to add, then the interface type will do just fine. 2510 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2511 return BaseType; 2512 2513 // Look in the folding set for an existing type. 2514 llvm::FoldingSetNodeID ID; 2515 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2516 void *InsertPos = 0; 2517 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2518 return QualType(QT, 0); 2519 2520 // Build the canonical type, which has the canonical base type and 2521 // a sorted-and-uniqued list of protocols. 2522 QualType Canonical; 2523 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2524 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2525 if (!ProtocolsSorted) { 2526 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2527 Protocols + NumProtocols); 2528 unsigned UniqueCount = NumProtocols; 2529 2530 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2531 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2532 &Sorted[0], UniqueCount); 2533 } else { 2534 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2535 Protocols, NumProtocols); 2536 } 2537 2538 // Regenerate InsertPos. 2539 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2540 } 2541 2542 unsigned Size = sizeof(ObjCObjectTypeImpl); 2543 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2544 void *Mem = Allocate(Size, TypeAlignment); 2545 ObjCObjectTypeImpl *T = 2546 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2547 2548 Types.push_back(T); 2549 ObjCObjectTypes.InsertNode(T, InsertPos); 2550 return QualType(T, 0); 2551} 2552 2553/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2554/// the given object type. 2555QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) const { 2556 llvm::FoldingSetNodeID ID; 2557 ObjCObjectPointerType::Profile(ID, ObjectT); 2558 2559 void *InsertPos = 0; 2560 if (ObjCObjectPointerType *QT = 2561 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2562 return QualType(QT, 0); 2563 2564 // Find the canonical object type. 2565 QualType Canonical; 2566 if (!ObjectT.isCanonical()) { 2567 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2568 2569 // Regenerate InsertPos. 2570 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2571 } 2572 2573 // No match. 2574 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2575 ObjCObjectPointerType *QType = 2576 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2577 2578 Types.push_back(QType); 2579 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2580 return QualType(QType, 0); 2581} 2582 2583/// getObjCInterfaceType - Return the unique reference to the type for the 2584/// specified ObjC interface decl. The list of protocols is optional. 2585QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) const { 2586 if (Decl->TypeForDecl) 2587 return QualType(Decl->TypeForDecl, 0); 2588 2589 // FIXME: redeclarations? 2590 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2591 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2592 Decl->TypeForDecl = T; 2593 Types.push_back(T); 2594 return QualType(T, 0); 2595} 2596 2597/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2598/// TypeOfExprType AST's (since expression's are never shared). For example, 2599/// multiple declarations that refer to "typeof(x)" all contain different 2600/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2601/// on canonical type's (which are always unique). 2602QualType ASTContext::getTypeOfExprType(Expr *tofExpr) const { 2603 TypeOfExprType *toe; 2604 if (tofExpr->isTypeDependent()) { 2605 llvm::FoldingSetNodeID ID; 2606 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2607 2608 void *InsertPos = 0; 2609 DependentTypeOfExprType *Canon 2610 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2611 if (Canon) { 2612 // We already have a "canonical" version of an identical, dependent 2613 // typeof(expr) type. Use that as our canonical type. 2614 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2615 QualType((TypeOfExprType*)Canon, 0)); 2616 } 2617 else { 2618 // Build a new, canonical typeof(expr) type. 2619 Canon 2620 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2621 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2622 toe = Canon; 2623 } 2624 } else { 2625 QualType Canonical = getCanonicalType(tofExpr->getType()); 2626 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2627 } 2628 Types.push_back(toe); 2629 return QualType(toe, 0); 2630} 2631 2632/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2633/// TypeOfType AST's. The only motivation to unique these nodes would be 2634/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2635/// an issue. This doesn't effect the type checker, since it operates 2636/// on canonical type's (which are always unique). 2637QualType ASTContext::getTypeOfType(QualType tofType) const { 2638 QualType Canonical = getCanonicalType(tofType); 2639 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2640 Types.push_back(tot); 2641 return QualType(tot, 0); 2642} 2643 2644/// getDecltypeForExpr - Given an expr, will return the decltype for that 2645/// expression, according to the rules in C++0x [dcl.type.simple]p4 2646static QualType getDecltypeForExpr(const Expr *e, const ASTContext &Context) { 2647 if (e->isTypeDependent()) 2648 return Context.DependentTy; 2649 2650 // If e is an id expression or a class member access, decltype(e) is defined 2651 // as the type of the entity named by e. 2652 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2653 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2654 return VD->getType(); 2655 } 2656 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2657 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2658 return FD->getType(); 2659 } 2660 // If e is a function call or an invocation of an overloaded operator, 2661 // (parentheses around e are ignored), decltype(e) is defined as the 2662 // return type of that function. 2663 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2664 return CE->getCallReturnType(); 2665 2666 QualType T = e->getType(); 2667 2668 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2669 // defined as T&, otherwise decltype(e) is defined as T. 2670 if (e->isLValue()) 2671 T = Context.getLValueReferenceType(T); 2672 2673 return T; 2674} 2675 2676/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2677/// DecltypeType AST's. The only motivation to unique these nodes would be 2678/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2679/// an issue. This doesn't effect the type checker, since it operates 2680/// on canonical type's (which are always unique). 2681QualType ASTContext::getDecltypeType(Expr *e) const { 2682 DecltypeType *dt; 2683 if (e->isTypeDependent()) { 2684 llvm::FoldingSetNodeID ID; 2685 DependentDecltypeType::Profile(ID, *this, e); 2686 2687 void *InsertPos = 0; 2688 DependentDecltypeType *Canon 2689 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2690 if (Canon) { 2691 // We already have a "canonical" version of an equivalent, dependent 2692 // decltype type. Use that as our canonical type. 2693 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2694 QualType((DecltypeType*)Canon, 0)); 2695 } 2696 else { 2697 // Build a new, canonical typeof(expr) type. 2698 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2699 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2700 dt = Canon; 2701 } 2702 } else { 2703 QualType T = getDecltypeForExpr(e, *this); 2704 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2705 } 2706 Types.push_back(dt); 2707 return QualType(dt, 0); 2708} 2709 2710/// getAutoType - We only unique auto types after they've been deduced. 2711QualType ASTContext::getAutoType(QualType DeducedType) const { 2712 void *InsertPos = 0; 2713 if (!DeducedType.isNull()) { 2714 // Look in the folding set for an existing type. 2715 llvm::FoldingSetNodeID ID; 2716 AutoType::Profile(ID, DeducedType); 2717 if (AutoType *AT = AutoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2718 return QualType(AT, 0); 2719 } 2720 2721 AutoType *AT = new (*this, TypeAlignment) AutoType(DeducedType); 2722 Types.push_back(AT); 2723 if (InsertPos) 2724 AutoTypes.InsertNode(AT, InsertPos); 2725 return QualType(AT, 0); 2726} 2727 2728/// getTagDeclType - Return the unique reference to the type for the 2729/// specified TagDecl (struct/union/class/enum) decl. 2730QualType ASTContext::getTagDeclType(const TagDecl *Decl) const { 2731 assert (Decl); 2732 // FIXME: What is the design on getTagDeclType when it requires casting 2733 // away const? mutable? 2734 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2735} 2736 2737/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2738/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2739/// needs to agree with the definition in <stddef.h>. 2740CanQualType ASTContext::getSizeType() const { 2741 return getFromTargetType(Target.getSizeType()); 2742} 2743 2744/// getSignedWCharType - Return the type of "signed wchar_t". 2745/// Used when in C++, as a GCC extension. 2746QualType ASTContext::getSignedWCharType() const { 2747 // FIXME: derive from "Target" ? 2748 return WCharTy; 2749} 2750 2751/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2752/// Used when in C++, as a GCC extension. 2753QualType ASTContext::getUnsignedWCharType() const { 2754 // FIXME: derive from "Target" ? 2755 return UnsignedIntTy; 2756} 2757 2758/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2759/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2760QualType ASTContext::getPointerDiffType() const { 2761 return getFromTargetType(Target.getPtrDiffType(0)); 2762} 2763 2764//===----------------------------------------------------------------------===// 2765// Type Operators 2766//===----------------------------------------------------------------------===// 2767 2768CanQualType ASTContext::getCanonicalParamType(QualType T) const { 2769 // Push qualifiers into arrays, and then discard any remaining 2770 // qualifiers. 2771 T = getCanonicalType(T); 2772 T = getVariableArrayDecayedType(T); 2773 const Type *Ty = T.getTypePtr(); 2774 QualType Result; 2775 if (isa<ArrayType>(Ty)) { 2776 Result = getArrayDecayedType(QualType(Ty,0)); 2777 } else if (isa<FunctionType>(Ty)) { 2778 Result = getPointerType(QualType(Ty, 0)); 2779 } else { 2780 Result = QualType(Ty, 0); 2781 } 2782 2783 return CanQualType::CreateUnsafe(Result); 2784} 2785 2786 2787QualType ASTContext::getUnqualifiedArrayType(QualType type, 2788 Qualifiers &quals) { 2789 SplitQualType splitType = type.getSplitUnqualifiedType(); 2790 2791 // FIXME: getSplitUnqualifiedType() actually walks all the way to 2792 // the unqualified desugared type and then drops it on the floor. 2793 // We then have to strip that sugar back off with 2794 // getUnqualifiedDesugaredType(), which is silly. 2795 const ArrayType *AT = 2796 dyn_cast<ArrayType>(splitType.first->getUnqualifiedDesugaredType()); 2797 2798 // If we don't have an array, just use the results in splitType. 2799 if (!AT) { 2800 quals = splitType.second; 2801 return QualType(splitType.first, 0); 2802 } 2803 2804 // Otherwise, recurse on the array's element type. 2805 QualType elementType = AT->getElementType(); 2806 QualType unqualElementType = getUnqualifiedArrayType(elementType, quals); 2807 2808 // If that didn't change the element type, AT has no qualifiers, so we 2809 // can just use the results in splitType. 2810 if (elementType == unqualElementType) { 2811 assert(quals.empty()); // from the recursive call 2812 quals = splitType.second; 2813 return QualType(splitType.first, 0); 2814 } 2815 2816 // Otherwise, add in the qualifiers from the outermost type, then 2817 // build the type back up. 2818 quals.addConsistentQualifiers(splitType.second); 2819 2820 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 2821 return getConstantArrayType(unqualElementType, CAT->getSize(), 2822 CAT->getSizeModifier(), 0); 2823 } 2824 2825 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 2826 return getIncompleteArrayType(unqualElementType, IAT->getSizeModifier(), 0); 2827 } 2828 2829 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 2830 return getVariableArrayType(unqualElementType, 2831 VAT->getSizeExpr(), 2832 VAT->getSizeModifier(), 2833 VAT->getIndexTypeCVRQualifiers(), 2834 VAT->getBracketsRange()); 2835 } 2836 2837 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 2838 return getDependentSizedArrayType(unqualElementType, DSAT->getSizeExpr(), 2839 DSAT->getSizeModifier(), 0, 2840 SourceRange()); 2841} 2842 2843/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 2844/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 2845/// they point to and return true. If T1 and T2 aren't pointer types 2846/// or pointer-to-member types, or if they are not similar at this 2847/// level, returns false and leaves T1 and T2 unchanged. Top-level 2848/// qualifiers on T1 and T2 are ignored. This function will typically 2849/// be called in a loop that successively "unwraps" pointer and 2850/// pointer-to-member types to compare them at each level. 2851bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 2852 const PointerType *T1PtrType = T1->getAs<PointerType>(), 2853 *T2PtrType = T2->getAs<PointerType>(); 2854 if (T1PtrType && T2PtrType) { 2855 T1 = T1PtrType->getPointeeType(); 2856 T2 = T2PtrType->getPointeeType(); 2857 return true; 2858 } 2859 2860 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 2861 *T2MPType = T2->getAs<MemberPointerType>(); 2862 if (T1MPType && T2MPType && 2863 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 2864 QualType(T2MPType->getClass(), 0))) { 2865 T1 = T1MPType->getPointeeType(); 2866 T2 = T2MPType->getPointeeType(); 2867 return true; 2868 } 2869 2870 if (getLangOptions().ObjC1) { 2871 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 2872 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 2873 if (T1OPType && T2OPType) { 2874 T1 = T1OPType->getPointeeType(); 2875 T2 = T2OPType->getPointeeType(); 2876 return true; 2877 } 2878 } 2879 2880 // FIXME: Block pointers, too? 2881 2882 return false; 2883} 2884 2885DeclarationNameInfo 2886ASTContext::getNameForTemplate(TemplateName Name, 2887 SourceLocation NameLoc) const { 2888 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2889 // DNInfo work in progress: CHECKME: what about DNLoc? 2890 return DeclarationNameInfo(TD->getDeclName(), NameLoc); 2891 2892 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2893 DeclarationName DName; 2894 if (DTN->isIdentifier()) { 2895 DName = DeclarationNames.getIdentifier(DTN->getIdentifier()); 2896 return DeclarationNameInfo(DName, NameLoc); 2897 } else { 2898 DName = DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2899 // DNInfo work in progress: FIXME: source locations? 2900 DeclarationNameLoc DNLoc; 2901 DNLoc.CXXOperatorName.BeginOpNameLoc = SourceLocation().getRawEncoding(); 2902 DNLoc.CXXOperatorName.EndOpNameLoc = SourceLocation().getRawEncoding(); 2903 return DeclarationNameInfo(DName, NameLoc, DNLoc); 2904 } 2905 } 2906 2907 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2908 assert(Storage); 2909 // DNInfo work in progress: CHECKME: what about DNLoc? 2910 return DeclarationNameInfo((*Storage->begin())->getDeclName(), NameLoc); 2911} 2912 2913TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) const { 2914 if (TemplateDecl *Template = Name.getAsTemplateDecl()) { 2915 if (TemplateTemplateParmDecl *TTP 2916 = dyn_cast<TemplateTemplateParmDecl>(Template)) 2917 Template = getCanonicalTemplateTemplateParmDecl(TTP); 2918 2919 // The canonical template name is the canonical template declaration. 2920 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2921 } 2922 2923 if (SubstTemplateTemplateParmPackStorage *SubstPack 2924 = Name.getAsSubstTemplateTemplateParmPack()) { 2925 TemplateTemplateParmDecl *CanonParam 2926 = getCanonicalTemplateTemplateParmDecl(SubstPack->getParameterPack()); 2927 TemplateArgument CanonArgPack 2928 = getCanonicalTemplateArgument(SubstPack->getArgumentPack()); 2929 return getSubstTemplateTemplateParmPack(CanonParam, CanonArgPack); 2930 } 2931 2932 assert(!Name.getAsOverloadedTemplate()); 2933 2934 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2935 assert(DTN && "Non-dependent template names must refer to template decls."); 2936 return DTN->CanonicalTemplateName; 2937} 2938 2939bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2940 X = getCanonicalTemplateName(X); 2941 Y = getCanonicalTemplateName(Y); 2942 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2943} 2944 2945TemplateArgument 2946ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) const { 2947 switch (Arg.getKind()) { 2948 case TemplateArgument::Null: 2949 return Arg; 2950 2951 case TemplateArgument::Expression: 2952 return Arg; 2953 2954 case TemplateArgument::Declaration: 2955 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2956 2957 case TemplateArgument::Template: 2958 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2959 2960 case TemplateArgument::TemplateExpansion: 2961 return TemplateArgument(getCanonicalTemplateName( 2962 Arg.getAsTemplateOrTemplatePattern()), 2963 Arg.getNumTemplateExpansions()); 2964 2965 case TemplateArgument::Integral: 2966 return TemplateArgument(*Arg.getAsIntegral(), 2967 getCanonicalType(Arg.getIntegralType())); 2968 2969 case TemplateArgument::Type: 2970 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2971 2972 case TemplateArgument::Pack: { 2973 if (Arg.pack_size() == 0) 2974 return Arg; 2975 2976 TemplateArgument *CanonArgs 2977 = new (*this) TemplateArgument[Arg.pack_size()]; 2978 unsigned Idx = 0; 2979 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2980 AEnd = Arg.pack_end(); 2981 A != AEnd; (void)++A, ++Idx) 2982 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2983 2984 return TemplateArgument(CanonArgs, Arg.pack_size()); 2985 } 2986 } 2987 2988 // Silence GCC warning 2989 assert(false && "Unhandled template argument kind"); 2990 return TemplateArgument(); 2991} 2992 2993NestedNameSpecifier * 2994ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const { 2995 if (!NNS) 2996 return 0; 2997 2998 switch (NNS->getKind()) { 2999 case NestedNameSpecifier::Identifier: 3000 // Canonicalize the prefix but keep the identifier the same. 3001 return NestedNameSpecifier::Create(*this, 3002 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 3003 NNS->getAsIdentifier()); 3004 3005 case NestedNameSpecifier::Namespace: 3006 // A namespace is canonical; build a nested-name-specifier with 3007 // this namespace and no prefix. 3008 return NestedNameSpecifier::Create(*this, 0, 3009 NNS->getAsNamespace()->getOriginalNamespace()); 3010 3011 case NestedNameSpecifier::NamespaceAlias: 3012 // A namespace is canonical; build a nested-name-specifier with 3013 // this namespace and no prefix. 3014 return NestedNameSpecifier::Create(*this, 0, 3015 NNS->getAsNamespaceAlias()->getNamespace() 3016 ->getOriginalNamespace()); 3017 3018 case NestedNameSpecifier::TypeSpec: 3019 case NestedNameSpecifier::TypeSpecWithTemplate: { 3020 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 3021 3022 // If we have some kind of dependent-named type (e.g., "typename T::type"), 3023 // break it apart into its prefix and identifier, then reconsititute those 3024 // as the canonical nested-name-specifier. This is required to canonicalize 3025 // a dependent nested-name-specifier involving typedefs of dependent-name 3026 // types, e.g., 3027 // typedef typename T::type T1; 3028 // typedef typename T1::type T2; 3029 if (const DependentNameType *DNT = T->getAs<DependentNameType>()) { 3030 NestedNameSpecifier *Prefix 3031 = getCanonicalNestedNameSpecifier(DNT->getQualifier()); 3032 return NestedNameSpecifier::Create(*this, Prefix, 3033 const_cast<IdentifierInfo *>(DNT->getIdentifier())); 3034 } 3035 3036 // Do the same thing as above, but with dependent-named specializations. 3037 if (const DependentTemplateSpecializationType *DTST 3038 = T->getAs<DependentTemplateSpecializationType>()) { 3039 NestedNameSpecifier *Prefix 3040 = getCanonicalNestedNameSpecifier(DTST->getQualifier()); 3041 3042 T = getDependentTemplateSpecializationType(DTST->getKeyword(), 3043 Prefix, DTST->getIdentifier(), 3044 DTST->getNumArgs(), 3045 DTST->getArgs()); 3046 T = getCanonicalType(T); 3047 } 3048 3049 return NestedNameSpecifier::Create(*this, 0, false, 3050 const_cast<Type*>(T.getTypePtr())); 3051 } 3052 3053 case NestedNameSpecifier::Global: 3054 // The global specifier is canonical and unique. 3055 return NNS; 3056 } 3057 3058 // Required to silence a GCC warning 3059 return 0; 3060} 3061 3062 3063const ArrayType *ASTContext::getAsArrayType(QualType T) const { 3064 // Handle the non-qualified case efficiently. 3065 if (!T.hasLocalQualifiers()) { 3066 // Handle the common positive case fast. 3067 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 3068 return AT; 3069 } 3070 3071 // Handle the common negative case fast. 3072 if (!isa<ArrayType>(T.getCanonicalType())) 3073 return 0; 3074 3075 // Apply any qualifiers from the array type to the element type. This 3076 // implements C99 6.7.3p8: "If the specification of an array type includes 3077 // any type qualifiers, the element type is so qualified, not the array type." 3078 3079 // If we get here, we either have type qualifiers on the type, or we have 3080 // sugar such as a typedef in the way. If we have type qualifiers on the type 3081 // we must propagate them down into the element type. 3082 3083 SplitQualType split = T.getSplitDesugaredType(); 3084 Qualifiers qs = split.second; 3085 3086 // If we have a simple case, just return now. 3087 const ArrayType *ATy = dyn_cast<ArrayType>(split.first); 3088 if (ATy == 0 || qs.empty()) 3089 return ATy; 3090 3091 // Otherwise, we have an array and we have qualifiers on it. Push the 3092 // qualifiers into the array element type and return a new array type. 3093 QualType NewEltTy = getQualifiedType(ATy->getElementType(), qs); 3094 3095 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 3096 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 3097 CAT->getSizeModifier(), 3098 CAT->getIndexTypeCVRQualifiers())); 3099 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 3100 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 3101 IAT->getSizeModifier(), 3102 IAT->getIndexTypeCVRQualifiers())); 3103 3104 if (const DependentSizedArrayType *DSAT 3105 = dyn_cast<DependentSizedArrayType>(ATy)) 3106 return cast<ArrayType>( 3107 getDependentSizedArrayType(NewEltTy, 3108 DSAT->getSizeExpr(), 3109 DSAT->getSizeModifier(), 3110 DSAT->getIndexTypeCVRQualifiers(), 3111 DSAT->getBracketsRange())); 3112 3113 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 3114 return cast<ArrayType>(getVariableArrayType(NewEltTy, 3115 VAT->getSizeExpr(), 3116 VAT->getSizeModifier(), 3117 VAT->getIndexTypeCVRQualifiers(), 3118 VAT->getBracketsRange())); 3119} 3120 3121/// getArrayDecayedType - Return the properly qualified result of decaying the 3122/// specified array type to a pointer. This operation is non-trivial when 3123/// handling typedefs etc. The canonical type of "T" must be an array type, 3124/// this returns a pointer to a properly qualified element of the array. 3125/// 3126/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 3127QualType ASTContext::getArrayDecayedType(QualType Ty) const { 3128 // Get the element type with 'getAsArrayType' so that we don't lose any 3129 // typedefs in the element type of the array. This also handles propagation 3130 // of type qualifiers from the array type into the element type if present 3131 // (C99 6.7.3p8). 3132 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 3133 assert(PrettyArrayType && "Not an array type!"); 3134 3135 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 3136 3137 // int x[restrict 4] -> int *restrict 3138 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 3139} 3140 3141QualType ASTContext::getBaseElementType(const ArrayType *array) const { 3142 return getBaseElementType(array->getElementType()); 3143} 3144 3145QualType ASTContext::getBaseElementType(QualType type) const { 3146 Qualifiers qs; 3147 while (true) { 3148 SplitQualType split = type.getSplitDesugaredType(); 3149 const ArrayType *array = split.first->getAsArrayTypeUnsafe(); 3150 if (!array) break; 3151 3152 type = array->getElementType(); 3153 qs.addConsistentQualifiers(split.second); 3154 } 3155 3156 return getQualifiedType(type, qs); 3157} 3158 3159/// getConstantArrayElementCount - Returns number of constant array elements. 3160uint64_t 3161ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 3162 uint64_t ElementCount = 1; 3163 do { 3164 ElementCount *= CA->getSize().getZExtValue(); 3165 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 3166 } while (CA); 3167 return ElementCount; 3168} 3169 3170/// getFloatingRank - Return a relative rank for floating point types. 3171/// This routine will assert if passed a built-in type that isn't a float. 3172static FloatingRank getFloatingRank(QualType T) { 3173 if (const ComplexType *CT = T->getAs<ComplexType>()) 3174 return getFloatingRank(CT->getElementType()); 3175 3176 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 3177 switch (T->getAs<BuiltinType>()->getKind()) { 3178 default: assert(0 && "getFloatingRank(): not a floating type"); 3179 case BuiltinType::Float: return FloatRank; 3180 case BuiltinType::Double: return DoubleRank; 3181 case BuiltinType::LongDouble: return LongDoubleRank; 3182 } 3183} 3184 3185/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 3186/// point or a complex type (based on typeDomain/typeSize). 3187/// 'typeDomain' is a real floating point or complex type. 3188/// 'typeSize' is a real floating point or complex type. 3189QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 3190 QualType Domain) const { 3191 FloatingRank EltRank = getFloatingRank(Size); 3192 if (Domain->isComplexType()) { 3193 switch (EltRank) { 3194 default: assert(0 && "getFloatingRank(): illegal value for rank"); 3195 case FloatRank: return FloatComplexTy; 3196 case DoubleRank: return DoubleComplexTy; 3197 case LongDoubleRank: return LongDoubleComplexTy; 3198 } 3199 } 3200 3201 assert(Domain->isRealFloatingType() && "Unknown domain!"); 3202 switch (EltRank) { 3203 default: assert(0 && "getFloatingRank(): illegal value for rank"); 3204 case FloatRank: return FloatTy; 3205 case DoubleRank: return DoubleTy; 3206 case LongDoubleRank: return LongDoubleTy; 3207 } 3208} 3209 3210/// getFloatingTypeOrder - Compare the rank of the two specified floating 3211/// point types, ignoring the domain of the type (i.e. 'double' == 3212/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 3213/// LHS < RHS, return -1. 3214int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) const { 3215 FloatingRank LHSR = getFloatingRank(LHS); 3216 FloatingRank RHSR = getFloatingRank(RHS); 3217 3218 if (LHSR == RHSR) 3219 return 0; 3220 if (LHSR > RHSR) 3221 return 1; 3222 return -1; 3223} 3224 3225/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 3226/// routine will assert if passed a built-in type that isn't an integer or enum, 3227/// or if it is not canonicalized. 3228unsigned ASTContext::getIntegerRank(const Type *T) const { 3229 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 3230 if (const EnumType* ET = dyn_cast<EnumType>(T)) 3231 T = ET->getDecl()->getPromotionType().getTypePtr(); 3232 3233 if (T->isSpecificBuiltinType(BuiltinType::WChar_S) || 3234 T->isSpecificBuiltinType(BuiltinType::WChar_U)) 3235 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 3236 3237 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 3238 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 3239 3240 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 3241 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 3242 3243 switch (cast<BuiltinType>(T)->getKind()) { 3244 default: assert(0 && "getIntegerRank(): not a built-in integer"); 3245 case BuiltinType::Bool: 3246 return 1 + (getIntWidth(BoolTy) << 3); 3247 case BuiltinType::Char_S: 3248 case BuiltinType::Char_U: 3249 case BuiltinType::SChar: 3250 case BuiltinType::UChar: 3251 return 2 + (getIntWidth(CharTy) << 3); 3252 case BuiltinType::Short: 3253 case BuiltinType::UShort: 3254 return 3 + (getIntWidth(ShortTy) << 3); 3255 case BuiltinType::Int: 3256 case BuiltinType::UInt: 3257 return 4 + (getIntWidth(IntTy) << 3); 3258 case BuiltinType::Long: 3259 case BuiltinType::ULong: 3260 return 5 + (getIntWidth(LongTy) << 3); 3261 case BuiltinType::LongLong: 3262 case BuiltinType::ULongLong: 3263 return 6 + (getIntWidth(LongLongTy) << 3); 3264 case BuiltinType::Int128: 3265 case BuiltinType::UInt128: 3266 return 7 + (getIntWidth(Int128Ty) << 3); 3267 } 3268} 3269 3270/// \brief Whether this is a promotable bitfield reference according 3271/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 3272/// 3273/// \returns the type this bit-field will promote to, or NULL if no 3274/// promotion occurs. 3275QualType ASTContext::isPromotableBitField(Expr *E) const { 3276 if (E->isTypeDependent() || E->isValueDependent()) 3277 return QualType(); 3278 3279 FieldDecl *Field = E->getBitField(); 3280 if (!Field) 3281 return QualType(); 3282 3283 QualType FT = Field->getType(); 3284 3285 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 3286 uint64_t BitWidth = BitWidthAP.getZExtValue(); 3287 uint64_t IntSize = getTypeSize(IntTy); 3288 // GCC extension compatibility: if the bit-field size is less than or equal 3289 // to the size of int, it gets promoted no matter what its type is. 3290 // For instance, unsigned long bf : 4 gets promoted to signed int. 3291 if (BitWidth < IntSize) 3292 return IntTy; 3293 3294 if (BitWidth == IntSize) 3295 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 3296 3297 // Types bigger than int are not subject to promotions, and therefore act 3298 // like the base type. 3299 // FIXME: This doesn't quite match what gcc does, but what gcc does here 3300 // is ridiculous. 3301 return QualType(); 3302} 3303 3304/// getPromotedIntegerType - Returns the type that Promotable will 3305/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 3306/// integer type. 3307QualType ASTContext::getPromotedIntegerType(QualType Promotable) const { 3308 assert(!Promotable.isNull()); 3309 assert(Promotable->isPromotableIntegerType()); 3310 if (const EnumType *ET = Promotable->getAs<EnumType>()) 3311 return ET->getDecl()->getPromotionType(); 3312 if (Promotable->isSignedIntegerType()) 3313 return IntTy; 3314 uint64_t PromotableSize = getTypeSize(Promotable); 3315 uint64_t IntSize = getTypeSize(IntTy); 3316 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 3317 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 3318} 3319 3320/// getIntegerTypeOrder - Returns the highest ranked integer type: 3321/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 3322/// LHS < RHS, return -1. 3323int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) const { 3324 const Type *LHSC = getCanonicalType(LHS).getTypePtr(); 3325 const Type *RHSC = getCanonicalType(RHS).getTypePtr(); 3326 if (LHSC == RHSC) return 0; 3327 3328 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 3329 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 3330 3331 unsigned LHSRank = getIntegerRank(LHSC); 3332 unsigned RHSRank = getIntegerRank(RHSC); 3333 3334 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 3335 if (LHSRank == RHSRank) return 0; 3336 return LHSRank > RHSRank ? 1 : -1; 3337 } 3338 3339 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 3340 if (LHSUnsigned) { 3341 // If the unsigned [LHS] type is larger, return it. 3342 if (LHSRank >= RHSRank) 3343 return 1; 3344 3345 // If the signed type can represent all values of the unsigned type, it 3346 // wins. Because we are dealing with 2's complement and types that are 3347 // powers of two larger than each other, this is always safe. 3348 return -1; 3349 } 3350 3351 // If the unsigned [RHS] type is larger, return it. 3352 if (RHSRank >= LHSRank) 3353 return -1; 3354 3355 // If the signed type can represent all values of the unsigned type, it 3356 // wins. Because we are dealing with 2's complement and types that are 3357 // powers of two larger than each other, this is always safe. 3358 return 1; 3359} 3360 3361static RecordDecl * 3362CreateRecordDecl(const ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 3363 SourceLocation L, IdentifierInfo *Id) { 3364 if (Ctx.getLangOptions().CPlusPlus) 3365 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 3366 else 3367 return RecordDecl::Create(Ctx, TK, DC, L, Id); 3368} 3369 3370// getCFConstantStringType - Return the type used for constant CFStrings. 3371QualType ASTContext::getCFConstantStringType() const { 3372 if (!CFConstantStringTypeDecl) { 3373 CFConstantStringTypeDecl = 3374 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3375 &Idents.get("NSConstantString")); 3376 CFConstantStringTypeDecl->startDefinition(); 3377 3378 QualType FieldTypes[4]; 3379 3380 // const int *isa; 3381 FieldTypes[0] = getPointerType(IntTy.withConst()); 3382 // int flags; 3383 FieldTypes[1] = IntTy; 3384 // const char *str; 3385 FieldTypes[2] = getPointerType(CharTy.withConst()); 3386 // long length; 3387 FieldTypes[3] = LongTy; 3388 3389 // Create fields 3390 for (unsigned i = 0; i < 4; ++i) { 3391 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 3392 SourceLocation(), 0, 3393 FieldTypes[i], /*TInfo=*/0, 3394 /*BitWidth=*/0, 3395 /*Mutable=*/false); 3396 Field->setAccess(AS_public); 3397 CFConstantStringTypeDecl->addDecl(Field); 3398 } 3399 3400 CFConstantStringTypeDecl->completeDefinition(); 3401 } 3402 3403 return getTagDeclType(CFConstantStringTypeDecl); 3404} 3405 3406void ASTContext::setCFConstantStringType(QualType T) { 3407 const RecordType *Rec = T->getAs<RecordType>(); 3408 assert(Rec && "Invalid CFConstantStringType"); 3409 CFConstantStringTypeDecl = Rec->getDecl(); 3410} 3411 3412// getNSConstantStringType - Return the type used for constant NSStrings. 3413QualType ASTContext::getNSConstantStringType() const { 3414 if (!NSConstantStringTypeDecl) { 3415 NSConstantStringTypeDecl = 3416 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3417 &Idents.get("__builtin_NSString")); 3418 NSConstantStringTypeDecl->startDefinition(); 3419 3420 QualType FieldTypes[3]; 3421 3422 // const int *isa; 3423 FieldTypes[0] = getPointerType(IntTy.withConst()); 3424 // const char *str; 3425 FieldTypes[1] = getPointerType(CharTy.withConst()); 3426 // unsigned int length; 3427 FieldTypes[2] = UnsignedIntTy; 3428 3429 // Create fields 3430 for (unsigned i = 0; i < 3; ++i) { 3431 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 3432 SourceLocation(), 0, 3433 FieldTypes[i], /*TInfo=*/0, 3434 /*BitWidth=*/0, 3435 /*Mutable=*/false); 3436 Field->setAccess(AS_public); 3437 NSConstantStringTypeDecl->addDecl(Field); 3438 } 3439 3440 NSConstantStringTypeDecl->completeDefinition(); 3441 } 3442 3443 return getTagDeclType(NSConstantStringTypeDecl); 3444} 3445 3446void ASTContext::setNSConstantStringType(QualType T) { 3447 const RecordType *Rec = T->getAs<RecordType>(); 3448 assert(Rec && "Invalid NSConstantStringType"); 3449 NSConstantStringTypeDecl = Rec->getDecl(); 3450} 3451 3452QualType ASTContext::getObjCFastEnumerationStateType() const { 3453 if (!ObjCFastEnumerationStateTypeDecl) { 3454 ObjCFastEnumerationStateTypeDecl = 3455 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3456 &Idents.get("__objcFastEnumerationState")); 3457 ObjCFastEnumerationStateTypeDecl->startDefinition(); 3458 3459 QualType FieldTypes[] = { 3460 UnsignedLongTy, 3461 getPointerType(ObjCIdTypedefType), 3462 getPointerType(UnsignedLongTy), 3463 getConstantArrayType(UnsignedLongTy, 3464 llvm::APInt(32, 5), ArrayType::Normal, 0) 3465 }; 3466 3467 for (size_t i = 0; i < 4; ++i) { 3468 FieldDecl *Field = FieldDecl::Create(*this, 3469 ObjCFastEnumerationStateTypeDecl, 3470 SourceLocation(), 0, 3471 FieldTypes[i], /*TInfo=*/0, 3472 /*BitWidth=*/0, 3473 /*Mutable=*/false); 3474 Field->setAccess(AS_public); 3475 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 3476 } 3477 3478 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 3479 } 3480 3481 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 3482} 3483 3484QualType ASTContext::getBlockDescriptorType() const { 3485 if (BlockDescriptorType) 3486 return getTagDeclType(BlockDescriptorType); 3487 3488 RecordDecl *T; 3489 // FIXME: Needs the FlagAppleBlock bit. 3490 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3491 &Idents.get("__block_descriptor")); 3492 T->startDefinition(); 3493 3494 QualType FieldTypes[] = { 3495 UnsignedLongTy, 3496 UnsignedLongTy, 3497 }; 3498 3499 const char *FieldNames[] = { 3500 "reserved", 3501 "Size" 3502 }; 3503 3504 for (size_t i = 0; i < 2; ++i) { 3505 FieldDecl *Field = FieldDecl::Create(*this, 3506 T, 3507 SourceLocation(), 3508 &Idents.get(FieldNames[i]), 3509 FieldTypes[i], /*TInfo=*/0, 3510 /*BitWidth=*/0, 3511 /*Mutable=*/false); 3512 Field->setAccess(AS_public); 3513 T->addDecl(Field); 3514 } 3515 3516 T->completeDefinition(); 3517 3518 BlockDescriptorType = T; 3519 3520 return getTagDeclType(BlockDescriptorType); 3521} 3522 3523void ASTContext::setBlockDescriptorType(QualType T) { 3524 const RecordType *Rec = T->getAs<RecordType>(); 3525 assert(Rec && "Invalid BlockDescriptorType"); 3526 BlockDescriptorType = Rec->getDecl(); 3527} 3528 3529QualType ASTContext::getBlockDescriptorExtendedType() const { 3530 if (BlockDescriptorExtendedType) 3531 return getTagDeclType(BlockDescriptorExtendedType); 3532 3533 RecordDecl *T; 3534 // FIXME: Needs the FlagAppleBlock bit. 3535 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3536 &Idents.get("__block_descriptor_withcopydispose")); 3537 T->startDefinition(); 3538 3539 QualType FieldTypes[] = { 3540 UnsignedLongTy, 3541 UnsignedLongTy, 3542 getPointerType(VoidPtrTy), 3543 getPointerType(VoidPtrTy) 3544 }; 3545 3546 const char *FieldNames[] = { 3547 "reserved", 3548 "Size", 3549 "CopyFuncPtr", 3550 "DestroyFuncPtr" 3551 }; 3552 3553 for (size_t i = 0; i < 4; ++i) { 3554 FieldDecl *Field = FieldDecl::Create(*this, 3555 T, 3556 SourceLocation(), 3557 &Idents.get(FieldNames[i]), 3558 FieldTypes[i], /*TInfo=*/0, 3559 /*BitWidth=*/0, 3560 /*Mutable=*/false); 3561 Field->setAccess(AS_public); 3562 T->addDecl(Field); 3563 } 3564 3565 T->completeDefinition(); 3566 3567 BlockDescriptorExtendedType = T; 3568 3569 return getTagDeclType(BlockDescriptorExtendedType); 3570} 3571 3572void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3573 const RecordType *Rec = T->getAs<RecordType>(); 3574 assert(Rec && "Invalid BlockDescriptorType"); 3575 BlockDescriptorExtendedType = Rec->getDecl(); 3576} 3577 3578bool ASTContext::BlockRequiresCopying(QualType Ty) const { 3579 if (Ty->isBlockPointerType()) 3580 return true; 3581 if (isObjCNSObjectType(Ty)) 3582 return true; 3583 if (Ty->isObjCObjectPointerType()) 3584 return true; 3585 if (getLangOptions().CPlusPlus) { 3586 if (const RecordType *RT = Ty->getAs<RecordType>()) { 3587 CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 3588 return RD->hasConstCopyConstructor(*this); 3589 3590 } 3591 } 3592 return false; 3593} 3594 3595QualType 3596ASTContext::BuildByRefType(llvm::StringRef DeclName, QualType Ty) const { 3597 // type = struct __Block_byref_1_X { 3598 // void *__isa; 3599 // struct __Block_byref_1_X *__forwarding; 3600 // unsigned int __flags; 3601 // unsigned int __size; 3602 // void *__copy_helper; // as needed 3603 // void *__destroy_help // as needed 3604 // int X; 3605 // } * 3606 3607 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3608 3609 // FIXME: Move up 3610 llvm::SmallString<36> Name; 3611 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3612 ++UniqueBlockByRefTypeID << '_' << DeclName; 3613 RecordDecl *T; 3614 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3615 &Idents.get(Name.str())); 3616 T->startDefinition(); 3617 QualType Int32Ty = IntTy; 3618 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3619 QualType FieldTypes[] = { 3620 getPointerType(VoidPtrTy), 3621 getPointerType(getTagDeclType(T)), 3622 Int32Ty, 3623 Int32Ty, 3624 getPointerType(VoidPtrTy), 3625 getPointerType(VoidPtrTy), 3626 Ty 3627 }; 3628 3629 llvm::StringRef FieldNames[] = { 3630 "__isa", 3631 "__forwarding", 3632 "__flags", 3633 "__size", 3634 "__copy_helper", 3635 "__destroy_helper", 3636 DeclName, 3637 }; 3638 3639 for (size_t i = 0; i < 7; ++i) { 3640 if (!HasCopyAndDispose && i >=4 && i <= 5) 3641 continue; 3642 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3643 &Idents.get(FieldNames[i]), 3644 FieldTypes[i], /*TInfo=*/0, 3645 /*BitWidth=*/0, /*Mutable=*/false); 3646 Field->setAccess(AS_public); 3647 T->addDecl(Field); 3648 } 3649 3650 T->completeDefinition(); 3651 3652 return getPointerType(getTagDeclType(T)); 3653} 3654 3655void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3656 const RecordType *Rec = T->getAs<RecordType>(); 3657 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3658 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3659} 3660 3661// This returns true if a type has been typedefed to BOOL: 3662// typedef <type> BOOL; 3663static bool isTypeTypedefedAsBOOL(QualType T) { 3664 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3665 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3666 return II->isStr("BOOL"); 3667 3668 return false; 3669} 3670 3671/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3672/// purpose. 3673CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) const { 3674 CharUnits sz = getTypeSizeInChars(type); 3675 3676 // Make all integer and enum types at least as large as an int 3677 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 3678 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3679 // Treat arrays as pointers, since that's how they're passed in. 3680 else if (type->isArrayType()) 3681 sz = getTypeSizeInChars(VoidPtrTy); 3682 return sz; 3683} 3684 3685static inline 3686std::string charUnitsToString(const CharUnits &CU) { 3687 return llvm::itostr(CU.getQuantity()); 3688} 3689 3690/// getObjCEncodingForBlock - Return the encoded type for this block 3691/// declaration. 3692std::string ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr) const { 3693 std::string S; 3694 3695 const BlockDecl *Decl = Expr->getBlockDecl(); 3696 QualType BlockTy = 3697 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3698 // Encode result type. 3699 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3700 // Compute size of all parameters. 3701 // Start with computing size of a pointer in number of bytes. 3702 // FIXME: There might(should) be a better way of doing this computation! 3703 SourceLocation Loc; 3704 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3705 CharUnits ParmOffset = PtrSize; 3706 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3707 E = Decl->param_end(); PI != E; ++PI) { 3708 QualType PType = (*PI)->getType(); 3709 CharUnits sz = getObjCEncodingTypeSize(PType); 3710 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3711 ParmOffset += sz; 3712 } 3713 // Size of the argument frame 3714 S += charUnitsToString(ParmOffset); 3715 // Block pointer and offset. 3716 S += "@?0"; 3717 ParmOffset = PtrSize; 3718 3719 // Argument types. 3720 ParmOffset = PtrSize; 3721 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3722 Decl->param_end(); PI != E; ++PI) { 3723 ParmVarDecl *PVDecl = *PI; 3724 QualType PType = PVDecl->getOriginalType(); 3725 if (const ArrayType *AT = 3726 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3727 // Use array's original type only if it has known number of 3728 // elements. 3729 if (!isa<ConstantArrayType>(AT)) 3730 PType = PVDecl->getType(); 3731 } else if (PType->isFunctionType()) 3732 PType = PVDecl->getType(); 3733 getObjCEncodingForType(PType, S); 3734 S += charUnitsToString(ParmOffset); 3735 ParmOffset += getObjCEncodingTypeSize(PType); 3736 } 3737 3738 return S; 3739} 3740 3741void ASTContext::getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, 3742 std::string& S) { 3743 // Encode result type. 3744 getObjCEncodingForType(Decl->getResultType(), S); 3745 CharUnits ParmOffset; 3746 // Compute size of all parameters. 3747 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 3748 E = Decl->param_end(); PI != E; ++PI) { 3749 QualType PType = (*PI)->getType(); 3750 CharUnits sz = getObjCEncodingTypeSize(PType); 3751 assert (sz.isPositive() && 3752 "getObjCEncodingForMethodDecl - Incomplete param type"); 3753 ParmOffset += sz; 3754 } 3755 S += charUnitsToString(ParmOffset); 3756 ParmOffset = CharUnits::Zero(); 3757 3758 // Argument types. 3759 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 3760 E = Decl->param_end(); PI != E; ++PI) { 3761 ParmVarDecl *PVDecl = *PI; 3762 QualType PType = PVDecl->getOriginalType(); 3763 if (const ArrayType *AT = 3764 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3765 // Use array's original type only if it has known number of 3766 // elements. 3767 if (!isa<ConstantArrayType>(AT)) 3768 PType = PVDecl->getType(); 3769 } else if (PType->isFunctionType()) 3770 PType = PVDecl->getType(); 3771 getObjCEncodingForType(PType, S); 3772 S += charUnitsToString(ParmOffset); 3773 ParmOffset += getObjCEncodingTypeSize(PType); 3774 } 3775} 3776 3777/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3778/// declaration. 3779void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3780 std::string& S) const { 3781 // FIXME: This is not very efficient. 3782 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3783 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3784 // Encode result type. 3785 getObjCEncodingForType(Decl->getResultType(), S); 3786 // Compute size of all parameters. 3787 // Start with computing size of a pointer in number of bytes. 3788 // FIXME: There might(should) be a better way of doing this computation! 3789 SourceLocation Loc; 3790 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3791 // The first two arguments (self and _cmd) are pointers; account for 3792 // their size. 3793 CharUnits ParmOffset = 2 * PtrSize; 3794 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3795 E = Decl->sel_param_end(); PI != E; ++PI) { 3796 QualType PType = (*PI)->getType(); 3797 CharUnits sz = getObjCEncodingTypeSize(PType); 3798 assert (sz.isPositive() && 3799 "getObjCEncodingForMethodDecl - Incomplete param type"); 3800 ParmOffset += sz; 3801 } 3802 S += charUnitsToString(ParmOffset); 3803 S += "@0:"; 3804 S += charUnitsToString(PtrSize); 3805 3806 // Argument types. 3807 ParmOffset = 2 * PtrSize; 3808 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3809 E = Decl->sel_param_end(); PI != E; ++PI) { 3810 ParmVarDecl *PVDecl = *PI; 3811 QualType PType = PVDecl->getOriginalType(); 3812 if (const ArrayType *AT = 3813 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3814 // Use array's original type only if it has known number of 3815 // elements. 3816 if (!isa<ConstantArrayType>(AT)) 3817 PType = PVDecl->getType(); 3818 } else if (PType->isFunctionType()) 3819 PType = PVDecl->getType(); 3820 // Process argument qualifiers for user supplied arguments; such as, 3821 // 'in', 'inout', etc. 3822 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3823 getObjCEncodingForType(PType, S); 3824 S += charUnitsToString(ParmOffset); 3825 ParmOffset += getObjCEncodingTypeSize(PType); 3826 } 3827} 3828 3829/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3830/// property declaration. If non-NULL, Container must be either an 3831/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3832/// NULL when getting encodings for protocol properties. 3833/// Property attributes are stored as a comma-delimited C string. The simple 3834/// attributes readonly and bycopy are encoded as single characters. The 3835/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3836/// encoded as single characters, followed by an identifier. Property types 3837/// are also encoded as a parametrized attribute. The characters used to encode 3838/// these attributes are defined by the following enumeration: 3839/// @code 3840/// enum PropertyAttributes { 3841/// kPropertyReadOnly = 'R', // property is read-only. 3842/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3843/// kPropertyByref = '&', // property is a reference to the value last assigned 3844/// kPropertyDynamic = 'D', // property is dynamic 3845/// kPropertyGetter = 'G', // followed by getter selector name 3846/// kPropertySetter = 'S', // followed by setter selector name 3847/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3848/// kPropertyType = 't' // followed by old-style type encoding. 3849/// kPropertyWeak = 'W' // 'weak' property 3850/// kPropertyStrong = 'P' // property GC'able 3851/// kPropertyNonAtomic = 'N' // property non-atomic 3852/// }; 3853/// @endcode 3854void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3855 const Decl *Container, 3856 std::string& S) const { 3857 // Collect information from the property implementation decl(s). 3858 bool Dynamic = false; 3859 ObjCPropertyImplDecl *SynthesizePID = 0; 3860 3861 // FIXME: Duplicated code due to poor abstraction. 3862 if (Container) { 3863 if (const ObjCCategoryImplDecl *CID = 3864 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3865 for (ObjCCategoryImplDecl::propimpl_iterator 3866 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3867 i != e; ++i) { 3868 ObjCPropertyImplDecl *PID = *i; 3869 if (PID->getPropertyDecl() == PD) { 3870 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3871 Dynamic = true; 3872 } else { 3873 SynthesizePID = PID; 3874 } 3875 } 3876 } 3877 } else { 3878 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3879 for (ObjCCategoryImplDecl::propimpl_iterator 3880 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3881 i != e; ++i) { 3882 ObjCPropertyImplDecl *PID = *i; 3883 if (PID->getPropertyDecl() == PD) { 3884 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3885 Dynamic = true; 3886 } else { 3887 SynthesizePID = PID; 3888 } 3889 } 3890 } 3891 } 3892 } 3893 3894 // FIXME: This is not very efficient. 3895 S = "T"; 3896 3897 // Encode result type. 3898 // GCC has some special rules regarding encoding of properties which 3899 // closely resembles encoding of ivars. 3900 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3901 true /* outermost type */, 3902 true /* encoding for property */); 3903 3904 if (PD->isReadOnly()) { 3905 S += ",R"; 3906 } else { 3907 switch (PD->getSetterKind()) { 3908 case ObjCPropertyDecl::Assign: break; 3909 case ObjCPropertyDecl::Copy: S += ",C"; break; 3910 case ObjCPropertyDecl::Retain: S += ",&"; break; 3911 } 3912 } 3913 3914 // It really isn't clear at all what this means, since properties 3915 // are "dynamic by default". 3916 if (Dynamic) 3917 S += ",D"; 3918 3919 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3920 S += ",N"; 3921 3922 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3923 S += ",G"; 3924 S += PD->getGetterName().getAsString(); 3925 } 3926 3927 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3928 S += ",S"; 3929 S += PD->getSetterName().getAsString(); 3930 } 3931 3932 if (SynthesizePID) { 3933 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3934 S += ",V"; 3935 S += OID->getNameAsString(); 3936 } 3937 3938 // FIXME: OBJCGC: weak & strong 3939} 3940 3941/// getLegacyIntegralTypeEncoding - 3942/// Another legacy compatibility encoding: 32-bit longs are encoded as 3943/// 'l' or 'L' , but not always. For typedefs, we need to use 3944/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3945/// 3946void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3947 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3948 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3949 if (BT->getKind() == BuiltinType::ULong && getIntWidth(PointeeTy) == 32) 3950 PointeeTy = UnsignedIntTy; 3951 else 3952 if (BT->getKind() == BuiltinType::Long && getIntWidth(PointeeTy) == 32) 3953 PointeeTy = IntTy; 3954 } 3955 } 3956} 3957 3958void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3959 const FieldDecl *Field) const { 3960 // We follow the behavior of gcc, expanding structures which are 3961 // directly pointed to, and expanding embedded structures. Note that 3962 // these rules are sufficient to prevent recursive encoding of the 3963 // same type. 3964 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3965 true /* outermost type */); 3966} 3967 3968static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 3969 switch (T->getAs<BuiltinType>()->getKind()) { 3970 default: assert(0 && "Unhandled builtin type kind"); 3971 case BuiltinType::Void: return 'v'; 3972 case BuiltinType::Bool: return 'B'; 3973 case BuiltinType::Char_U: 3974 case BuiltinType::UChar: return 'C'; 3975 case BuiltinType::UShort: return 'S'; 3976 case BuiltinType::UInt: return 'I'; 3977 case BuiltinType::ULong: 3978 return C->getIntWidth(T) == 32 ? 'L' : 'Q'; 3979 case BuiltinType::UInt128: return 'T'; 3980 case BuiltinType::ULongLong: return 'Q'; 3981 case BuiltinType::Char_S: 3982 case BuiltinType::SChar: return 'c'; 3983 case BuiltinType::Short: return 's'; 3984 case BuiltinType::WChar_S: 3985 case BuiltinType::WChar_U: 3986 case BuiltinType::Int: return 'i'; 3987 case BuiltinType::Long: 3988 return C->getIntWidth(T) == 32 ? 'l' : 'q'; 3989 case BuiltinType::LongLong: return 'q'; 3990 case BuiltinType::Int128: return 't'; 3991 case BuiltinType::Float: return 'f'; 3992 case BuiltinType::Double: return 'd'; 3993 case BuiltinType::LongDouble: return 'D'; 3994 } 3995} 3996 3997static void EncodeBitField(const ASTContext *Ctx, std::string& S, 3998 QualType T, const FieldDecl *FD) { 3999 const Expr *E = FD->getBitWidth(); 4000 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 4001 S += 'b'; 4002 // The NeXT runtime encodes bit fields as b followed by the number of bits. 4003 // The GNU runtime requires more information; bitfields are encoded as b, 4004 // then the offset (in bits) of the first element, then the type of the 4005 // bitfield, then the size in bits. For example, in this structure: 4006 // 4007 // struct 4008 // { 4009 // int integer; 4010 // int flags:2; 4011 // }; 4012 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 4013 // runtime, but b32i2 for the GNU runtime. The reason for this extra 4014 // information is not especially sensible, but we're stuck with it for 4015 // compatibility with GCC, although providing it breaks anything that 4016 // actually uses runtime introspection and wants to work on both runtimes... 4017 if (!Ctx->getLangOptions().NeXTRuntime) { 4018 const RecordDecl *RD = FD->getParent(); 4019 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 4020 // FIXME: This same linear search is also used in ExprConstant - it might 4021 // be better if the FieldDecl stored its offset. We'd be increasing the 4022 // size of the object slightly, but saving some time every time it is used. 4023 unsigned i = 0; 4024 for (RecordDecl::field_iterator Field = RD->field_begin(), 4025 FieldEnd = RD->field_end(); 4026 Field != FieldEnd; (void)++Field, ++i) { 4027 if (*Field == FD) 4028 break; 4029 } 4030 S += llvm::utostr(RL.getFieldOffset(i)); 4031 if (T->isEnumeralType()) 4032 S += 'i'; 4033 else 4034 S += ObjCEncodingForPrimitiveKind(Ctx, T); 4035 } 4036 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 4037 S += llvm::utostr(N); 4038} 4039 4040// FIXME: Use SmallString for accumulating string. 4041void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 4042 bool ExpandPointedToStructures, 4043 bool ExpandStructures, 4044 const FieldDecl *FD, 4045 bool OutermostType, 4046 bool EncodingProperty) const { 4047 if (T->getAs<BuiltinType>()) { 4048 if (FD && FD->isBitField()) 4049 return EncodeBitField(this, S, T, FD); 4050 S += ObjCEncodingForPrimitiveKind(this, T); 4051 return; 4052 } 4053 4054 if (const ComplexType *CT = T->getAs<ComplexType>()) { 4055 S += 'j'; 4056 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 4057 false); 4058 return; 4059 } 4060 4061 // encoding for pointer or r3eference types. 4062 QualType PointeeTy; 4063 if (const PointerType *PT = T->getAs<PointerType>()) { 4064 if (PT->isObjCSelType()) { 4065 S += ':'; 4066 return; 4067 } 4068 PointeeTy = PT->getPointeeType(); 4069 } 4070 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 4071 PointeeTy = RT->getPointeeType(); 4072 if (!PointeeTy.isNull()) { 4073 bool isReadOnly = false; 4074 // For historical/compatibility reasons, the read-only qualifier of the 4075 // pointee gets emitted _before_ the '^'. The read-only qualifier of 4076 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 4077 // Also, do not emit the 'r' for anything but the outermost type! 4078 if (isa<TypedefType>(T.getTypePtr())) { 4079 if (OutermostType && T.isConstQualified()) { 4080 isReadOnly = true; 4081 S += 'r'; 4082 } 4083 } else if (OutermostType) { 4084 QualType P = PointeeTy; 4085 while (P->getAs<PointerType>()) 4086 P = P->getAs<PointerType>()->getPointeeType(); 4087 if (P.isConstQualified()) { 4088 isReadOnly = true; 4089 S += 'r'; 4090 } 4091 } 4092 if (isReadOnly) { 4093 // Another legacy compatibility encoding. Some ObjC qualifier and type 4094 // combinations need to be rearranged. 4095 // Rewrite "in const" from "nr" to "rn" 4096 if (llvm::StringRef(S).endswith("nr")) 4097 S.replace(S.end()-2, S.end(), "rn"); 4098 } 4099 4100 if (PointeeTy->isCharType()) { 4101 // char pointer types should be encoded as '*' unless it is a 4102 // type that has been typedef'd to 'BOOL'. 4103 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 4104 S += '*'; 4105 return; 4106 } 4107 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 4108 // GCC binary compat: Need to convert "struct objc_class *" to "#". 4109 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 4110 S += '#'; 4111 return; 4112 } 4113 // GCC binary compat: Need to convert "struct objc_object *" to "@". 4114 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 4115 S += '@'; 4116 return; 4117 } 4118 // fall through... 4119 } 4120 S += '^'; 4121 getLegacyIntegralTypeEncoding(PointeeTy); 4122 4123 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 4124 NULL); 4125 return; 4126 } 4127 4128 if (const ArrayType *AT = 4129 // Ignore type qualifiers etc. 4130 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 4131 if (isa<IncompleteArrayType>(AT)) { 4132 // Incomplete arrays are encoded as a pointer to the array element. 4133 S += '^'; 4134 4135 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4136 false, ExpandStructures, FD); 4137 } else { 4138 S += '['; 4139 4140 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 4141 S += llvm::utostr(CAT->getSize().getZExtValue()); 4142 else { 4143 //Variable length arrays are encoded as a regular array with 0 elements. 4144 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 4145 S += '0'; 4146 } 4147 4148 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4149 false, ExpandStructures, FD); 4150 S += ']'; 4151 } 4152 return; 4153 } 4154 4155 if (T->getAs<FunctionType>()) { 4156 S += '?'; 4157 return; 4158 } 4159 4160 if (const RecordType *RTy = T->getAs<RecordType>()) { 4161 RecordDecl *RDecl = RTy->getDecl(); 4162 S += RDecl->isUnion() ? '(' : '{'; 4163 // Anonymous structures print as '?' 4164 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 4165 S += II->getName(); 4166 if (ClassTemplateSpecializationDecl *Spec 4167 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 4168 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 4169 std::string TemplateArgsStr 4170 = TemplateSpecializationType::PrintTemplateArgumentList( 4171 TemplateArgs.data(), 4172 TemplateArgs.size(), 4173 (*this).PrintingPolicy); 4174 4175 S += TemplateArgsStr; 4176 } 4177 } else { 4178 S += '?'; 4179 } 4180 if (ExpandStructures) { 4181 S += '='; 4182 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4183 FieldEnd = RDecl->field_end(); 4184 Field != FieldEnd; ++Field) { 4185 if (FD) { 4186 S += '"'; 4187 S += Field->getNameAsString(); 4188 S += '"'; 4189 } 4190 4191 // Special case bit-fields. 4192 if (Field->isBitField()) { 4193 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 4194 (*Field)); 4195 } else { 4196 QualType qt = Field->getType(); 4197 getLegacyIntegralTypeEncoding(qt); 4198 getObjCEncodingForTypeImpl(qt, S, false, true, 4199 FD); 4200 } 4201 } 4202 } 4203 S += RDecl->isUnion() ? ')' : '}'; 4204 return; 4205 } 4206 4207 if (T->isEnumeralType()) { 4208 if (FD && FD->isBitField()) 4209 EncodeBitField(this, S, T, FD); 4210 else 4211 S += 'i'; 4212 return; 4213 } 4214 4215 if (T->isBlockPointerType()) { 4216 S += "@?"; // Unlike a pointer-to-function, which is "^?". 4217 return; 4218 } 4219 4220 // Ignore protocol qualifiers when mangling at this level. 4221 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 4222 T = OT->getBaseType(); 4223 4224 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 4225 // @encode(class_name) 4226 ObjCInterfaceDecl *OI = OIT->getDecl(); 4227 S += '{'; 4228 const IdentifierInfo *II = OI->getIdentifier(); 4229 S += II->getName(); 4230 S += '='; 4231 llvm::SmallVector<ObjCIvarDecl*, 32> Ivars; 4232 DeepCollectObjCIvars(OI, true, Ivars); 4233 for (unsigned i = 0, e = Ivars.size(); i != e; ++i) { 4234 FieldDecl *Field = cast<FieldDecl>(Ivars[i]); 4235 if (Field->isBitField()) 4236 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, Field); 4237 else 4238 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, FD); 4239 } 4240 S += '}'; 4241 return; 4242 } 4243 4244 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 4245 if (OPT->isObjCIdType()) { 4246 S += '@'; 4247 return; 4248 } 4249 4250 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 4251 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 4252 // Since this is a binary compatibility issue, need to consult with runtime 4253 // folks. Fortunately, this is a *very* obsure construct. 4254 S += '#'; 4255 return; 4256 } 4257 4258 if (OPT->isObjCQualifiedIdType()) { 4259 getObjCEncodingForTypeImpl(getObjCIdType(), S, 4260 ExpandPointedToStructures, 4261 ExpandStructures, FD); 4262 if (FD || EncodingProperty) { 4263 // Note that we do extended encoding of protocol qualifer list 4264 // Only when doing ivar or property encoding. 4265 S += '"'; 4266 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4267 E = OPT->qual_end(); I != E; ++I) { 4268 S += '<'; 4269 S += (*I)->getNameAsString(); 4270 S += '>'; 4271 } 4272 S += '"'; 4273 } 4274 return; 4275 } 4276 4277 QualType PointeeTy = OPT->getPointeeType(); 4278 if (!EncodingProperty && 4279 isa<TypedefType>(PointeeTy.getTypePtr())) { 4280 // Another historical/compatibility reason. 4281 // We encode the underlying type which comes out as 4282 // {...}; 4283 S += '^'; 4284 getObjCEncodingForTypeImpl(PointeeTy, S, 4285 false, ExpandPointedToStructures, 4286 NULL); 4287 return; 4288 } 4289 4290 S += '@'; 4291 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 4292 S += '"'; 4293 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 4294 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4295 E = OPT->qual_end(); I != E; ++I) { 4296 S += '<'; 4297 S += (*I)->getNameAsString(); 4298 S += '>'; 4299 } 4300 S += '"'; 4301 } 4302 return; 4303 } 4304 4305 // gcc just blithely ignores member pointers. 4306 // TODO: maybe there should be a mangling for these 4307 if (T->getAs<MemberPointerType>()) 4308 return; 4309 4310 if (T->isVectorType()) { 4311 // This matches gcc's encoding, even though technically it is 4312 // insufficient. 4313 // FIXME. We should do a better job than gcc. 4314 return; 4315 } 4316 4317 assert(0 && "@encode for type not implemented!"); 4318} 4319 4320void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 4321 std::string& S) const { 4322 if (QT & Decl::OBJC_TQ_In) 4323 S += 'n'; 4324 if (QT & Decl::OBJC_TQ_Inout) 4325 S += 'N'; 4326 if (QT & Decl::OBJC_TQ_Out) 4327 S += 'o'; 4328 if (QT & Decl::OBJC_TQ_Bycopy) 4329 S += 'O'; 4330 if (QT & Decl::OBJC_TQ_Byref) 4331 S += 'R'; 4332 if (QT & Decl::OBJC_TQ_Oneway) 4333 S += 'V'; 4334} 4335 4336void ASTContext::setBuiltinVaListType(QualType T) { 4337 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 4338 4339 BuiltinVaListType = T; 4340} 4341 4342void ASTContext::setObjCIdType(QualType T) { 4343 ObjCIdTypedefType = T; 4344} 4345 4346void ASTContext::setObjCSelType(QualType T) { 4347 ObjCSelTypedefType = T; 4348} 4349 4350void ASTContext::setObjCProtoType(QualType QT) { 4351 ObjCProtoType = QT; 4352} 4353 4354void ASTContext::setObjCClassType(QualType T) { 4355 ObjCClassTypedefType = T; 4356} 4357 4358void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 4359 assert(ObjCConstantStringType.isNull() && 4360 "'NSConstantString' type already set!"); 4361 4362 ObjCConstantStringType = getObjCInterfaceType(Decl); 4363} 4364 4365/// \brief Retrieve the template name that corresponds to a non-empty 4366/// lookup. 4367TemplateName 4368ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 4369 UnresolvedSetIterator End) const { 4370 unsigned size = End - Begin; 4371 assert(size > 1 && "set is not overloaded!"); 4372 4373 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 4374 size * sizeof(FunctionTemplateDecl*)); 4375 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 4376 4377 NamedDecl **Storage = OT->getStorage(); 4378 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 4379 NamedDecl *D = *I; 4380 assert(isa<FunctionTemplateDecl>(D) || 4381 (isa<UsingShadowDecl>(D) && 4382 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 4383 *Storage++ = D; 4384 } 4385 4386 return TemplateName(OT); 4387} 4388 4389/// \brief Retrieve the template name that represents a qualified 4390/// template name such as \c std::vector. 4391TemplateName 4392ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 4393 bool TemplateKeyword, 4394 TemplateDecl *Template) const { 4395 assert(NNS && "Missing nested-name-specifier in qualified template name"); 4396 4397 // FIXME: Canonicalization? 4398 llvm::FoldingSetNodeID ID; 4399 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 4400 4401 void *InsertPos = 0; 4402 QualifiedTemplateName *QTN = 4403 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4404 if (!QTN) { 4405 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 4406 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 4407 } 4408 4409 return TemplateName(QTN); 4410} 4411 4412/// \brief Retrieve the template name that represents a dependent 4413/// template name such as \c MetaFun::template apply. 4414TemplateName 4415ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4416 const IdentifierInfo *Name) const { 4417 assert((!NNS || NNS->isDependent()) && 4418 "Nested name specifier must be dependent"); 4419 4420 llvm::FoldingSetNodeID ID; 4421 DependentTemplateName::Profile(ID, NNS, Name); 4422 4423 void *InsertPos = 0; 4424 DependentTemplateName *QTN = 4425 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4426 4427 if (QTN) 4428 return TemplateName(QTN); 4429 4430 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4431 if (CanonNNS == NNS) { 4432 QTN = new (*this,4) DependentTemplateName(NNS, Name); 4433 } else { 4434 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 4435 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 4436 DependentTemplateName *CheckQTN = 4437 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4438 assert(!CheckQTN && "Dependent type name canonicalization broken"); 4439 (void)CheckQTN; 4440 } 4441 4442 DependentTemplateNames.InsertNode(QTN, InsertPos); 4443 return TemplateName(QTN); 4444} 4445 4446/// \brief Retrieve the template name that represents a dependent 4447/// template name such as \c MetaFun::template operator+. 4448TemplateName 4449ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4450 OverloadedOperatorKind Operator) const { 4451 assert((!NNS || NNS->isDependent()) && 4452 "Nested name specifier must be dependent"); 4453 4454 llvm::FoldingSetNodeID ID; 4455 DependentTemplateName::Profile(ID, NNS, Operator); 4456 4457 void *InsertPos = 0; 4458 DependentTemplateName *QTN 4459 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4460 4461 if (QTN) 4462 return TemplateName(QTN); 4463 4464 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4465 if (CanonNNS == NNS) { 4466 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 4467 } else { 4468 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 4469 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 4470 4471 DependentTemplateName *CheckQTN 4472 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4473 assert(!CheckQTN && "Dependent template name canonicalization broken"); 4474 (void)CheckQTN; 4475 } 4476 4477 DependentTemplateNames.InsertNode(QTN, InsertPos); 4478 return TemplateName(QTN); 4479} 4480 4481TemplateName 4482ASTContext::getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 4483 const TemplateArgument &ArgPack) const { 4484 ASTContext &Self = const_cast<ASTContext &>(*this); 4485 llvm::FoldingSetNodeID ID; 4486 SubstTemplateTemplateParmPackStorage::Profile(ID, Self, Param, ArgPack); 4487 4488 void *InsertPos = 0; 4489 SubstTemplateTemplateParmPackStorage *Subst 4490 = SubstTemplateTemplateParmPacks.FindNodeOrInsertPos(ID, InsertPos); 4491 4492 if (!Subst) { 4493 Subst = new (*this) SubstTemplateTemplateParmPackStorage(Self, Param, 4494 ArgPack.pack_size(), 4495 ArgPack.pack_begin()); 4496 SubstTemplateTemplateParmPacks.InsertNode(Subst, InsertPos); 4497 } 4498 4499 return TemplateName(Subst); 4500} 4501 4502/// getFromTargetType - Given one of the integer types provided by 4503/// TargetInfo, produce the corresponding type. The unsigned @p Type 4504/// is actually a value of type @c TargetInfo::IntType. 4505CanQualType ASTContext::getFromTargetType(unsigned Type) const { 4506 switch (Type) { 4507 case TargetInfo::NoInt: return CanQualType(); 4508 case TargetInfo::SignedShort: return ShortTy; 4509 case TargetInfo::UnsignedShort: return UnsignedShortTy; 4510 case TargetInfo::SignedInt: return IntTy; 4511 case TargetInfo::UnsignedInt: return UnsignedIntTy; 4512 case TargetInfo::SignedLong: return LongTy; 4513 case TargetInfo::UnsignedLong: return UnsignedLongTy; 4514 case TargetInfo::SignedLongLong: return LongLongTy; 4515 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 4516 } 4517 4518 assert(false && "Unhandled TargetInfo::IntType value"); 4519 return CanQualType(); 4520} 4521 4522//===----------------------------------------------------------------------===// 4523// Type Predicates. 4524//===----------------------------------------------------------------------===// 4525 4526/// isObjCNSObjectType - Return true if this is an NSObject object using 4527/// NSObject attribute on a c-style pointer type. 4528/// FIXME - Make it work directly on types. 4529/// FIXME: Move to Type. 4530/// 4531bool ASTContext::isObjCNSObjectType(QualType Ty) const { 4532 if (const TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 4533 if (TypedefDecl *TD = TDT->getDecl()) 4534 if (TD->getAttr<ObjCNSObjectAttr>()) 4535 return true; 4536 } 4537 return false; 4538} 4539 4540/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 4541/// garbage collection attribute. 4542/// 4543Qualifiers::GC ASTContext::getObjCGCAttrKind(QualType Ty) const { 4544 if (getLangOptions().getGCMode() == LangOptions::NonGC) 4545 return Qualifiers::GCNone; 4546 4547 assert(getLangOptions().ObjC1); 4548 Qualifiers::GC GCAttrs = Ty.getObjCGCAttr(); 4549 4550 // Default behaviour under objective-C's gc is for ObjC pointers 4551 // (or pointers to them) be treated as though they were declared 4552 // as __strong. 4553 if (GCAttrs == Qualifiers::GCNone) { 4554 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 4555 return Qualifiers::Strong; 4556 else if (Ty->isPointerType()) 4557 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 4558 } else { 4559 // It's not valid to set GC attributes on anything that isn't a 4560 // pointer. 4561#ifndef NDEBUG 4562 QualType CT = Ty->getCanonicalTypeInternal(); 4563 while (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 4564 CT = AT->getElementType(); 4565 assert(CT->isAnyPointerType() || CT->isBlockPointerType()); 4566#endif 4567 } 4568 return GCAttrs; 4569} 4570 4571//===----------------------------------------------------------------------===// 4572// Type Compatibility Testing 4573//===----------------------------------------------------------------------===// 4574 4575/// areCompatVectorTypes - Return true if the two specified vector types are 4576/// compatible. 4577static bool areCompatVectorTypes(const VectorType *LHS, 4578 const VectorType *RHS) { 4579 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 4580 return LHS->getElementType() == RHS->getElementType() && 4581 LHS->getNumElements() == RHS->getNumElements(); 4582} 4583 4584bool ASTContext::areCompatibleVectorTypes(QualType FirstVec, 4585 QualType SecondVec) { 4586 assert(FirstVec->isVectorType() && "FirstVec should be a vector type"); 4587 assert(SecondVec->isVectorType() && "SecondVec should be a vector type"); 4588 4589 if (hasSameUnqualifiedType(FirstVec, SecondVec)) 4590 return true; 4591 4592 // Treat Neon vector types and most AltiVec vector types as if they are the 4593 // equivalent GCC vector types. 4594 const VectorType *First = FirstVec->getAs<VectorType>(); 4595 const VectorType *Second = SecondVec->getAs<VectorType>(); 4596 if (First->getNumElements() == Second->getNumElements() && 4597 hasSameType(First->getElementType(), Second->getElementType()) && 4598 First->getVectorKind() != VectorType::AltiVecPixel && 4599 First->getVectorKind() != VectorType::AltiVecBool && 4600 Second->getVectorKind() != VectorType::AltiVecPixel && 4601 Second->getVectorKind() != VectorType::AltiVecBool) 4602 return true; 4603 4604 return false; 4605} 4606 4607//===----------------------------------------------------------------------===// 4608// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 4609//===----------------------------------------------------------------------===// 4610 4611/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 4612/// inheritance hierarchy of 'rProto'. 4613bool 4614ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 4615 ObjCProtocolDecl *rProto) const { 4616 if (lProto == rProto) 4617 return true; 4618 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 4619 E = rProto->protocol_end(); PI != E; ++PI) 4620 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 4621 return true; 4622 return false; 4623} 4624 4625/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 4626/// return true if lhs's protocols conform to rhs's protocol; false 4627/// otherwise. 4628bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 4629 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 4630 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 4631 return false; 4632} 4633 4634/// ObjCQualifiedClassTypesAreCompatible - compare Class<p,...> and 4635/// Class<p1, ...>. 4636bool ASTContext::ObjCQualifiedClassTypesAreCompatible(QualType lhs, 4637 QualType rhs) { 4638 const ObjCObjectPointerType *lhsQID = lhs->getAs<ObjCObjectPointerType>(); 4639 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4640 assert ((lhsQID && rhsOPT) && "ObjCQualifiedClassTypesAreCompatible"); 4641 4642 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4643 E = lhsQID->qual_end(); I != E; ++I) { 4644 bool match = false; 4645 ObjCProtocolDecl *lhsProto = *I; 4646 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4647 E = rhsOPT->qual_end(); J != E; ++J) { 4648 ObjCProtocolDecl *rhsProto = *J; 4649 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto)) { 4650 match = true; 4651 break; 4652 } 4653 } 4654 if (!match) 4655 return false; 4656 } 4657 return true; 4658} 4659 4660/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 4661/// ObjCQualifiedIDType. 4662bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4663 bool compare) { 4664 // Allow id<P..> and an 'id' or void* type in all cases. 4665 if (lhs->isVoidPointerType() || 4666 lhs->isObjCIdType() || lhs->isObjCClassType()) 4667 return true; 4668 else if (rhs->isVoidPointerType() || 4669 rhs->isObjCIdType() || rhs->isObjCClassType()) 4670 return true; 4671 4672 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4673 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4674 4675 if (!rhsOPT) return false; 4676 4677 if (rhsOPT->qual_empty()) { 4678 // If the RHS is a unqualified interface pointer "NSString*", 4679 // make sure we check the class hierarchy. 4680 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4681 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4682 E = lhsQID->qual_end(); I != E; ++I) { 4683 // when comparing an id<P> on lhs with a static type on rhs, 4684 // see if static class implements all of id's protocols, directly or 4685 // through its super class and categories. 4686 if (!rhsID->ClassImplementsProtocol(*I, true)) 4687 return false; 4688 } 4689 } 4690 // If there are no qualifiers and no interface, we have an 'id'. 4691 return true; 4692 } 4693 // Both the right and left sides have qualifiers. 4694 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4695 E = lhsQID->qual_end(); I != E; ++I) { 4696 ObjCProtocolDecl *lhsProto = *I; 4697 bool match = false; 4698 4699 // when comparing an id<P> on lhs with a static type on rhs, 4700 // see if static class implements all of id's protocols, directly or 4701 // through its super class and categories. 4702 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4703 E = rhsOPT->qual_end(); J != E; ++J) { 4704 ObjCProtocolDecl *rhsProto = *J; 4705 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4706 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4707 match = true; 4708 break; 4709 } 4710 } 4711 // If the RHS is a qualified interface pointer "NSString<P>*", 4712 // make sure we check the class hierarchy. 4713 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4714 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4715 E = lhsQID->qual_end(); I != E; ++I) { 4716 // when comparing an id<P> on lhs with a static type on rhs, 4717 // see if static class implements all of id's protocols, directly or 4718 // through its super class and categories. 4719 if (rhsID->ClassImplementsProtocol(*I, true)) { 4720 match = true; 4721 break; 4722 } 4723 } 4724 } 4725 if (!match) 4726 return false; 4727 } 4728 4729 return true; 4730 } 4731 4732 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4733 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4734 4735 if (const ObjCObjectPointerType *lhsOPT = 4736 lhs->getAsObjCInterfacePointerType()) { 4737 // If both the right and left sides have qualifiers. 4738 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4739 E = lhsOPT->qual_end(); I != E; ++I) { 4740 ObjCProtocolDecl *lhsProto = *I; 4741 bool match = false; 4742 4743 // when comparing an id<P> on rhs with a static type on lhs, 4744 // see if static class implements all of id's protocols, directly or 4745 // through its super class and categories. 4746 // First, lhs protocols in the qualifier list must be found, direct 4747 // or indirect in rhs's qualifier list or it is a mismatch. 4748 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4749 E = rhsQID->qual_end(); J != E; ++J) { 4750 ObjCProtocolDecl *rhsProto = *J; 4751 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4752 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4753 match = true; 4754 break; 4755 } 4756 } 4757 if (!match) 4758 return false; 4759 } 4760 4761 // Static class's protocols, or its super class or category protocols 4762 // must be found, direct or indirect in rhs's qualifier list or it is a mismatch. 4763 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4764 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4765 CollectInheritedProtocols(lhsID, LHSInheritedProtocols); 4766 // This is rather dubious but matches gcc's behavior. If lhs has 4767 // no type qualifier and its class has no static protocol(s) 4768 // assume that it is mismatch. 4769 if (LHSInheritedProtocols.empty() && lhsOPT->qual_empty()) 4770 return false; 4771 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4772 LHSInheritedProtocols.begin(), 4773 E = LHSInheritedProtocols.end(); I != E; ++I) { 4774 bool match = false; 4775 ObjCProtocolDecl *lhsProto = (*I); 4776 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4777 E = rhsQID->qual_end(); J != E; ++J) { 4778 ObjCProtocolDecl *rhsProto = *J; 4779 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4780 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4781 match = true; 4782 break; 4783 } 4784 } 4785 if (!match) 4786 return false; 4787 } 4788 } 4789 return true; 4790 } 4791 return false; 4792} 4793 4794/// canAssignObjCInterfaces - Return true if the two interface types are 4795/// compatible for assignment from RHS to LHS. This handles validation of any 4796/// protocol qualifiers on the LHS or RHS. 4797/// 4798bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4799 const ObjCObjectPointerType *RHSOPT) { 4800 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4801 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4802 4803 // If either type represents the built-in 'id' or 'Class' types, return true. 4804 if (LHS->isObjCUnqualifiedIdOrClass() || 4805 RHS->isObjCUnqualifiedIdOrClass()) 4806 return true; 4807 4808 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 4809 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4810 QualType(RHSOPT,0), 4811 false); 4812 4813 if (LHS->isObjCQualifiedClass() && RHS->isObjCQualifiedClass()) 4814 return ObjCQualifiedClassTypesAreCompatible(QualType(LHSOPT,0), 4815 QualType(RHSOPT,0)); 4816 4817 // If we have 2 user-defined types, fall into that path. 4818 if (LHS->getInterface() && RHS->getInterface()) 4819 return canAssignObjCInterfaces(LHS, RHS); 4820 4821 return false; 4822} 4823 4824/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4825/// for providing type-safty for objective-c pointers used to pass/return 4826/// arguments in block literals. When passed as arguments, passing 'A*' where 4827/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4828/// not OK. For the return type, the opposite is not OK. 4829bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4830 const ObjCObjectPointerType *LHSOPT, 4831 const ObjCObjectPointerType *RHSOPT) { 4832 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4833 return true; 4834 4835 if (LHSOPT->isObjCBuiltinType()) { 4836 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4837 } 4838 4839 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4840 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4841 QualType(RHSOPT,0), 4842 false); 4843 4844 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4845 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4846 if (LHS && RHS) { // We have 2 user-defined types. 4847 if (LHS != RHS) { 4848 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4849 return false; 4850 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4851 return true; 4852 } 4853 else 4854 return true; 4855 } 4856 return false; 4857} 4858 4859/// getIntersectionOfProtocols - This routine finds the intersection of set 4860/// of protocols inherited from two distinct objective-c pointer objects. 4861/// It is used to build composite qualifier list of the composite type of 4862/// the conditional expression involving two objective-c pointer objects. 4863static 4864void getIntersectionOfProtocols(ASTContext &Context, 4865 const ObjCObjectPointerType *LHSOPT, 4866 const ObjCObjectPointerType *RHSOPT, 4867 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4868 4869 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4870 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4871 assert(LHS->getInterface() && "LHS must have an interface base"); 4872 assert(RHS->getInterface() && "RHS must have an interface base"); 4873 4874 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4875 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4876 if (LHSNumProtocols > 0) 4877 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4878 else { 4879 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4880 Context.CollectInheritedProtocols(LHS->getInterface(), 4881 LHSInheritedProtocols); 4882 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4883 LHSInheritedProtocols.end()); 4884 } 4885 4886 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4887 if (RHSNumProtocols > 0) { 4888 ObjCProtocolDecl **RHSProtocols = 4889 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4890 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4891 if (InheritedProtocolSet.count(RHSProtocols[i])) 4892 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4893 } 4894 else { 4895 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4896 Context.CollectInheritedProtocols(RHS->getInterface(), 4897 RHSInheritedProtocols); 4898 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4899 RHSInheritedProtocols.begin(), 4900 E = RHSInheritedProtocols.end(); I != E; ++I) 4901 if (InheritedProtocolSet.count((*I))) 4902 IntersectionOfProtocols.push_back((*I)); 4903 } 4904} 4905 4906/// areCommonBaseCompatible - Returns common base class of the two classes if 4907/// one found. Note that this is O'2 algorithm. But it will be called as the 4908/// last type comparison in a ?-exp of ObjC pointer types before a 4909/// warning is issued. So, its invokation is extremely rare. 4910QualType ASTContext::areCommonBaseCompatible( 4911 const ObjCObjectPointerType *Lptr, 4912 const ObjCObjectPointerType *Rptr) { 4913 const ObjCObjectType *LHS = Lptr->getObjectType(); 4914 const ObjCObjectType *RHS = Rptr->getObjectType(); 4915 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 4916 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 4917 if (!LDecl || !RDecl) 4918 return QualType(); 4919 4920 while ((LDecl = LDecl->getSuperClass())) { 4921 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 4922 if (canAssignObjCInterfaces(LHS, RHS)) { 4923 llvm::SmallVector<ObjCProtocolDecl *, 8> Protocols; 4924 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 4925 4926 QualType Result = QualType(LHS, 0); 4927 if (!Protocols.empty()) 4928 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 4929 Result = getObjCObjectPointerType(Result); 4930 return Result; 4931 } 4932 } 4933 4934 return QualType(); 4935} 4936 4937bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 4938 const ObjCObjectType *RHS) { 4939 assert(LHS->getInterface() && "LHS is not an interface type"); 4940 assert(RHS->getInterface() && "RHS is not an interface type"); 4941 4942 // Verify that the base decls are compatible: the RHS must be a subclass of 4943 // the LHS. 4944 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 4945 return false; 4946 4947 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4948 // protocol qualified at all, then we are good. 4949 if (LHS->getNumProtocols() == 0) 4950 return true; 4951 4952 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4953 // isn't a superset. 4954 if (RHS->getNumProtocols() == 0) 4955 return true; // FIXME: should return false! 4956 4957 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 4958 LHSPE = LHS->qual_end(); 4959 LHSPI != LHSPE; LHSPI++) { 4960 bool RHSImplementsProtocol = false; 4961 4962 // If the RHS doesn't implement the protocol on the left, the types 4963 // are incompatible. 4964 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 4965 RHSPE = RHS->qual_end(); 4966 RHSPI != RHSPE; RHSPI++) { 4967 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4968 RHSImplementsProtocol = true; 4969 break; 4970 } 4971 } 4972 // FIXME: For better diagnostics, consider passing back the protocol name. 4973 if (!RHSImplementsProtocol) 4974 return false; 4975 } 4976 // The RHS implements all protocols listed on the LHS. 4977 return true; 4978} 4979 4980bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4981 // get the "pointed to" types 4982 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4983 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4984 4985 if (!LHSOPT || !RHSOPT) 4986 return false; 4987 4988 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4989 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4990} 4991 4992bool ASTContext::canBindObjCObjectType(QualType To, QualType From) { 4993 return canAssignObjCInterfaces( 4994 getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(), 4995 getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>()); 4996} 4997 4998/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4999/// both shall have the identically qualified version of a compatible type. 5000/// C99 6.2.7p1: Two types have compatible types if their types are the 5001/// same. See 6.7.[2,3,5] for additional rules. 5002bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS, 5003 bool CompareUnqualified) { 5004 if (getLangOptions().CPlusPlus) 5005 return hasSameType(LHS, RHS); 5006 5007 return !mergeTypes(LHS, RHS, false, CompareUnqualified).isNull(); 5008} 5009 5010bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 5011 return !mergeTypes(LHS, RHS, true).isNull(); 5012} 5013 5014/// mergeTransparentUnionType - if T is a transparent union type and a member 5015/// of T is compatible with SubType, return the merged type, else return 5016/// QualType() 5017QualType ASTContext::mergeTransparentUnionType(QualType T, QualType SubType, 5018 bool OfBlockPointer, 5019 bool Unqualified) { 5020 if (const RecordType *UT = T->getAsUnionType()) { 5021 RecordDecl *UD = UT->getDecl(); 5022 if (UD->hasAttr<TransparentUnionAttr>()) { 5023 for (RecordDecl::field_iterator it = UD->field_begin(), 5024 itend = UD->field_end(); it != itend; ++it) { 5025 QualType ET = it->getType().getUnqualifiedType(); 5026 QualType MT = mergeTypes(ET, SubType, OfBlockPointer, Unqualified); 5027 if (!MT.isNull()) 5028 return MT; 5029 } 5030 } 5031 } 5032 5033 return QualType(); 5034} 5035 5036/// mergeFunctionArgumentTypes - merge two types which appear as function 5037/// argument types 5038QualType ASTContext::mergeFunctionArgumentTypes(QualType lhs, QualType rhs, 5039 bool OfBlockPointer, 5040 bool Unqualified) { 5041 // GNU extension: two types are compatible if they appear as a function 5042 // argument, one of the types is a transparent union type and the other 5043 // type is compatible with a union member 5044 QualType lmerge = mergeTransparentUnionType(lhs, rhs, OfBlockPointer, 5045 Unqualified); 5046 if (!lmerge.isNull()) 5047 return lmerge; 5048 5049 QualType rmerge = mergeTransparentUnionType(rhs, lhs, OfBlockPointer, 5050 Unqualified); 5051 if (!rmerge.isNull()) 5052 return rmerge; 5053 5054 return mergeTypes(lhs, rhs, OfBlockPointer, Unqualified); 5055} 5056 5057QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 5058 bool OfBlockPointer, 5059 bool Unqualified) { 5060 const FunctionType *lbase = lhs->getAs<FunctionType>(); 5061 const FunctionType *rbase = rhs->getAs<FunctionType>(); 5062 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 5063 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 5064 bool allLTypes = true; 5065 bool allRTypes = true; 5066 5067 // Check return type 5068 QualType retType; 5069 if (OfBlockPointer) { 5070 QualType RHS = rbase->getResultType(); 5071 QualType LHS = lbase->getResultType(); 5072 bool UnqualifiedResult = Unqualified; 5073 if (!UnqualifiedResult) 5074 UnqualifiedResult = (!RHS.hasQualifiers() && LHS.hasQualifiers()); 5075 retType = mergeTypes(RHS, LHS, true, UnqualifiedResult); 5076 } 5077 else 5078 retType = mergeTypes(lbase->getResultType(), rbase->getResultType(), false, 5079 Unqualified); 5080 if (retType.isNull()) return QualType(); 5081 5082 if (Unqualified) 5083 retType = retType.getUnqualifiedType(); 5084 5085 CanQualType LRetType = getCanonicalType(lbase->getResultType()); 5086 CanQualType RRetType = getCanonicalType(rbase->getResultType()); 5087 if (Unqualified) { 5088 LRetType = LRetType.getUnqualifiedType(); 5089 RRetType = RRetType.getUnqualifiedType(); 5090 } 5091 5092 if (getCanonicalType(retType) != LRetType) 5093 allLTypes = false; 5094 if (getCanonicalType(retType) != RRetType) 5095 allRTypes = false; 5096 5097 // FIXME: double check this 5098 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 5099 // rbase->getRegParmAttr() != 0 && 5100 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 5101 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 5102 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 5103 5104 // Compatible functions must have compatible calling conventions 5105 if (!isSameCallConv(lbaseInfo.getCC(), rbaseInfo.getCC())) 5106 return QualType(); 5107 5108 // Regparm is part of the calling convention. 5109 if (lbaseInfo.getRegParm() != rbaseInfo.getRegParm()) 5110 return QualType(); 5111 5112 // It's noreturn if either type is. 5113 // FIXME: some uses, e.g. conditional exprs, really want this to be 'both'. 5114 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 5115 if (NoReturn != lbaseInfo.getNoReturn()) 5116 allLTypes = false; 5117 if (NoReturn != rbaseInfo.getNoReturn()) 5118 allRTypes = false; 5119 5120 FunctionType::ExtInfo einfo(NoReturn, 5121 lbaseInfo.getRegParm(), 5122 lbaseInfo.getCC()); 5123 5124 if (lproto && rproto) { // two C99 style function prototypes 5125 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 5126 "C++ shouldn't be here"); 5127 unsigned lproto_nargs = lproto->getNumArgs(); 5128 unsigned rproto_nargs = rproto->getNumArgs(); 5129 5130 // Compatible functions must have the same number of arguments 5131 if (lproto_nargs != rproto_nargs) 5132 return QualType(); 5133 5134 // Variadic and non-variadic functions aren't compatible 5135 if (lproto->isVariadic() != rproto->isVariadic()) 5136 return QualType(); 5137 5138 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 5139 return QualType(); 5140 5141 // Check argument compatibility 5142 llvm::SmallVector<QualType, 10> types; 5143 for (unsigned i = 0; i < lproto_nargs; i++) { 5144 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 5145 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 5146 QualType argtype = mergeFunctionArgumentTypes(largtype, rargtype, 5147 OfBlockPointer, 5148 Unqualified); 5149 if (argtype.isNull()) return QualType(); 5150 5151 if (Unqualified) 5152 argtype = argtype.getUnqualifiedType(); 5153 5154 types.push_back(argtype); 5155 if (Unqualified) { 5156 largtype = largtype.getUnqualifiedType(); 5157 rargtype = rargtype.getUnqualifiedType(); 5158 } 5159 5160 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 5161 allLTypes = false; 5162 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 5163 allRTypes = false; 5164 } 5165 if (allLTypes) return lhs; 5166 if (allRTypes) return rhs; 5167 5168 FunctionProtoType::ExtProtoInfo EPI = lproto->getExtProtoInfo(); 5169 EPI.ExtInfo = einfo; 5170 return getFunctionType(retType, types.begin(), types.size(), EPI); 5171 } 5172 5173 if (lproto) allRTypes = false; 5174 if (rproto) allLTypes = false; 5175 5176 const FunctionProtoType *proto = lproto ? lproto : rproto; 5177 if (proto) { 5178 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 5179 if (proto->isVariadic()) return QualType(); 5180 // Check that the types are compatible with the types that 5181 // would result from default argument promotions (C99 6.7.5.3p15). 5182 // The only types actually affected are promotable integer 5183 // types and floats, which would be passed as a different 5184 // type depending on whether the prototype is visible. 5185 unsigned proto_nargs = proto->getNumArgs(); 5186 for (unsigned i = 0; i < proto_nargs; ++i) { 5187 QualType argTy = proto->getArgType(i); 5188 5189 // Look at the promotion type of enum types, since that is the type used 5190 // to pass enum values. 5191 if (const EnumType *Enum = argTy->getAs<EnumType>()) 5192 argTy = Enum->getDecl()->getPromotionType(); 5193 5194 if (argTy->isPromotableIntegerType() || 5195 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 5196 return QualType(); 5197 } 5198 5199 if (allLTypes) return lhs; 5200 if (allRTypes) return rhs; 5201 5202 FunctionProtoType::ExtProtoInfo EPI = proto->getExtProtoInfo(); 5203 EPI.ExtInfo = einfo; 5204 return getFunctionType(retType, proto->arg_type_begin(), 5205 proto->getNumArgs(), EPI); 5206 } 5207 5208 if (allLTypes) return lhs; 5209 if (allRTypes) return rhs; 5210 return getFunctionNoProtoType(retType, einfo); 5211} 5212 5213QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 5214 bool OfBlockPointer, 5215 bool Unqualified) { 5216 // C++ [expr]: If an expression initially has the type "reference to T", the 5217 // type is adjusted to "T" prior to any further analysis, the expression 5218 // designates the object or function denoted by the reference, and the 5219 // expression is an lvalue unless the reference is an rvalue reference and 5220 // the expression is a function call (possibly inside parentheses). 5221 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 5222 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 5223 5224 if (Unqualified) { 5225 LHS = LHS.getUnqualifiedType(); 5226 RHS = RHS.getUnqualifiedType(); 5227 } 5228 5229 QualType LHSCan = getCanonicalType(LHS), 5230 RHSCan = getCanonicalType(RHS); 5231 5232 // If two types are identical, they are compatible. 5233 if (LHSCan == RHSCan) 5234 return LHS; 5235 5236 // If the qualifiers are different, the types aren't compatible... mostly. 5237 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5238 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5239 if (LQuals != RQuals) { 5240 // If any of these qualifiers are different, we have a type 5241 // mismatch. 5242 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5243 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5244 return QualType(); 5245 5246 // Exactly one GC qualifier difference is allowed: __strong is 5247 // okay if the other type has no GC qualifier but is an Objective 5248 // C object pointer (i.e. implicitly strong by default). We fix 5249 // this by pretending that the unqualified type was actually 5250 // qualified __strong. 5251 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5252 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5253 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5254 5255 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5256 return QualType(); 5257 5258 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 5259 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 5260 } 5261 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 5262 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 5263 } 5264 return QualType(); 5265 } 5266 5267 // Okay, qualifiers are equal. 5268 5269 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 5270 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 5271 5272 // We want to consider the two function types to be the same for these 5273 // comparisons, just force one to the other. 5274 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 5275 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 5276 5277 // Same as above for arrays 5278 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 5279 LHSClass = Type::ConstantArray; 5280 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 5281 RHSClass = Type::ConstantArray; 5282 5283 // ObjCInterfaces are just specialized ObjCObjects. 5284 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 5285 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 5286 5287 // Canonicalize ExtVector -> Vector. 5288 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 5289 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 5290 5291 // If the canonical type classes don't match. 5292 if (LHSClass != RHSClass) { 5293 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 5294 // a signed integer type, or an unsigned integer type. 5295 // Compatibility is based on the underlying type, not the promotion 5296 // type. 5297 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 5298 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 5299 return RHS; 5300 } 5301 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 5302 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 5303 return LHS; 5304 } 5305 5306 return QualType(); 5307 } 5308 5309 // The canonical type classes match. 5310 switch (LHSClass) { 5311#define TYPE(Class, Base) 5312#define ABSTRACT_TYPE(Class, Base) 5313#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 5314#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 5315#define DEPENDENT_TYPE(Class, Base) case Type::Class: 5316#include "clang/AST/TypeNodes.def" 5317 assert(false && "Non-canonical and dependent types shouldn't get here"); 5318 return QualType(); 5319 5320 case Type::LValueReference: 5321 case Type::RValueReference: 5322 case Type::MemberPointer: 5323 assert(false && "C++ should never be in mergeTypes"); 5324 return QualType(); 5325 5326 case Type::ObjCInterface: 5327 case Type::IncompleteArray: 5328 case Type::VariableArray: 5329 case Type::FunctionProto: 5330 case Type::ExtVector: 5331 assert(false && "Types are eliminated above"); 5332 return QualType(); 5333 5334 case Type::Pointer: 5335 { 5336 // Merge two pointer types, while trying to preserve typedef info 5337 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 5338 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 5339 if (Unqualified) { 5340 LHSPointee = LHSPointee.getUnqualifiedType(); 5341 RHSPointee = RHSPointee.getUnqualifiedType(); 5342 } 5343 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, false, 5344 Unqualified); 5345 if (ResultType.isNull()) return QualType(); 5346 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5347 return LHS; 5348 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5349 return RHS; 5350 return getPointerType(ResultType); 5351 } 5352 case Type::BlockPointer: 5353 { 5354 // Merge two block pointer types, while trying to preserve typedef info 5355 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 5356 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 5357 if (Unqualified) { 5358 LHSPointee = LHSPointee.getUnqualifiedType(); 5359 RHSPointee = RHSPointee.getUnqualifiedType(); 5360 } 5361 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer, 5362 Unqualified); 5363 if (ResultType.isNull()) return QualType(); 5364 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5365 return LHS; 5366 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5367 return RHS; 5368 return getBlockPointerType(ResultType); 5369 } 5370 case Type::ConstantArray: 5371 { 5372 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 5373 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 5374 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 5375 return QualType(); 5376 5377 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 5378 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 5379 if (Unqualified) { 5380 LHSElem = LHSElem.getUnqualifiedType(); 5381 RHSElem = RHSElem.getUnqualifiedType(); 5382 } 5383 5384 QualType ResultType = mergeTypes(LHSElem, RHSElem, false, Unqualified); 5385 if (ResultType.isNull()) return QualType(); 5386 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5387 return LHS; 5388 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5389 return RHS; 5390 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 5391 ArrayType::ArraySizeModifier(), 0); 5392 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 5393 ArrayType::ArraySizeModifier(), 0); 5394 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 5395 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 5396 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5397 return LHS; 5398 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5399 return RHS; 5400 if (LVAT) { 5401 // FIXME: This isn't correct! But tricky to implement because 5402 // the array's size has to be the size of LHS, but the type 5403 // has to be different. 5404 return LHS; 5405 } 5406 if (RVAT) { 5407 // FIXME: This isn't correct! But tricky to implement because 5408 // the array's size has to be the size of RHS, but the type 5409 // has to be different. 5410 return RHS; 5411 } 5412 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 5413 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 5414 return getIncompleteArrayType(ResultType, 5415 ArrayType::ArraySizeModifier(), 0); 5416 } 5417 case Type::FunctionNoProto: 5418 return mergeFunctionTypes(LHS, RHS, OfBlockPointer, Unqualified); 5419 case Type::Record: 5420 case Type::Enum: 5421 return QualType(); 5422 case Type::Builtin: 5423 // Only exactly equal builtin types are compatible, which is tested above. 5424 return QualType(); 5425 case Type::Complex: 5426 // Distinct complex types are incompatible. 5427 return QualType(); 5428 case Type::Vector: 5429 // FIXME: The merged type should be an ExtVector! 5430 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 5431 RHSCan->getAs<VectorType>())) 5432 return LHS; 5433 return QualType(); 5434 case Type::ObjCObject: { 5435 // Check if the types are assignment compatible. 5436 // FIXME: This should be type compatibility, e.g. whether 5437 // "LHS x; RHS x;" at global scope is legal. 5438 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 5439 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 5440 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 5441 return LHS; 5442 5443 return QualType(); 5444 } 5445 case Type::ObjCObjectPointer: { 5446 if (OfBlockPointer) { 5447 if (canAssignObjCInterfacesInBlockPointer( 5448 LHS->getAs<ObjCObjectPointerType>(), 5449 RHS->getAs<ObjCObjectPointerType>())) 5450 return LHS; 5451 return QualType(); 5452 } 5453 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 5454 RHS->getAs<ObjCObjectPointerType>())) 5455 return LHS; 5456 5457 return QualType(); 5458 } 5459 } 5460 5461 return QualType(); 5462} 5463 5464/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 5465/// 'RHS' attributes and returns the merged version; including for function 5466/// return types. 5467QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 5468 QualType LHSCan = getCanonicalType(LHS), 5469 RHSCan = getCanonicalType(RHS); 5470 // If two types are identical, they are compatible. 5471 if (LHSCan == RHSCan) 5472 return LHS; 5473 if (RHSCan->isFunctionType()) { 5474 if (!LHSCan->isFunctionType()) 5475 return QualType(); 5476 QualType OldReturnType = 5477 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 5478 QualType NewReturnType = 5479 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 5480 QualType ResReturnType = 5481 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 5482 if (ResReturnType.isNull()) 5483 return QualType(); 5484 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 5485 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 5486 // In either case, use OldReturnType to build the new function type. 5487 const FunctionType *F = LHS->getAs<FunctionType>(); 5488 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 5489 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 5490 EPI.ExtInfo = getFunctionExtInfo(LHS); 5491 QualType ResultType 5492 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 5493 FPT->getNumArgs(), EPI); 5494 return ResultType; 5495 } 5496 } 5497 return QualType(); 5498 } 5499 5500 // If the qualifiers are different, the types can still be merged. 5501 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5502 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5503 if (LQuals != RQuals) { 5504 // If any of these qualifiers are different, we have a type mismatch. 5505 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5506 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5507 return QualType(); 5508 5509 // Exactly one GC qualifier difference is allowed: __strong is 5510 // okay if the other type has no GC qualifier but is an Objective 5511 // C object pointer (i.e. implicitly strong by default). We fix 5512 // this by pretending that the unqualified type was actually 5513 // qualified __strong. 5514 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5515 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5516 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5517 5518 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5519 return QualType(); 5520 5521 if (GC_L == Qualifiers::Strong) 5522 return LHS; 5523 if (GC_R == Qualifiers::Strong) 5524 return RHS; 5525 return QualType(); 5526 } 5527 5528 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 5529 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5530 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5531 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 5532 if (ResQT == LHSBaseQT) 5533 return LHS; 5534 if (ResQT == RHSBaseQT) 5535 return RHS; 5536 } 5537 return QualType(); 5538} 5539 5540//===----------------------------------------------------------------------===// 5541// Integer Predicates 5542//===----------------------------------------------------------------------===// 5543 5544unsigned ASTContext::getIntWidth(QualType T) const { 5545 if (const EnumType *ET = dyn_cast<EnumType>(T)) 5546 T = ET->getDecl()->getIntegerType(); 5547 if (T->isBooleanType()) 5548 return 1; 5549 // For builtin types, just use the standard type sizing method 5550 return (unsigned)getTypeSize(T); 5551} 5552 5553QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 5554 assert(T->hasSignedIntegerRepresentation() && "Unexpected type"); 5555 5556 // Turn <4 x signed int> -> <4 x unsigned int> 5557 if (const VectorType *VTy = T->getAs<VectorType>()) 5558 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 5559 VTy->getNumElements(), VTy->getVectorKind()); 5560 5561 // For enums, we return the unsigned version of the base type. 5562 if (const EnumType *ETy = T->getAs<EnumType>()) 5563 T = ETy->getDecl()->getIntegerType(); 5564 5565 const BuiltinType *BTy = T->getAs<BuiltinType>(); 5566 assert(BTy && "Unexpected signed integer type"); 5567 switch (BTy->getKind()) { 5568 case BuiltinType::Char_S: 5569 case BuiltinType::SChar: 5570 return UnsignedCharTy; 5571 case BuiltinType::Short: 5572 return UnsignedShortTy; 5573 case BuiltinType::Int: 5574 return UnsignedIntTy; 5575 case BuiltinType::Long: 5576 return UnsignedLongTy; 5577 case BuiltinType::LongLong: 5578 return UnsignedLongLongTy; 5579 case BuiltinType::Int128: 5580 return UnsignedInt128Ty; 5581 default: 5582 assert(0 && "Unexpected signed integer type"); 5583 return QualType(); 5584 } 5585} 5586 5587ASTMutationListener::~ASTMutationListener() { } 5588 5589 5590//===----------------------------------------------------------------------===// 5591// Builtin Type Computation 5592//===----------------------------------------------------------------------===// 5593 5594/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 5595/// pointer over the consumed characters. This returns the resultant type. If 5596/// AllowTypeModifiers is false then modifier like * are not parsed, just basic 5597/// types. This allows "v2i*" to be parsed as a pointer to a v2i instead of 5598/// a vector of "i*". 5599/// 5600/// RequiresICE is filled in on return to indicate whether the value is required 5601/// to be an Integer Constant Expression. 5602static QualType DecodeTypeFromStr(const char *&Str, const ASTContext &Context, 5603 ASTContext::GetBuiltinTypeError &Error, 5604 bool &RequiresICE, 5605 bool AllowTypeModifiers) { 5606 // Modifiers. 5607 int HowLong = 0; 5608 bool Signed = false, Unsigned = false; 5609 RequiresICE = false; 5610 5611 // Read the prefixed modifiers first. 5612 bool Done = false; 5613 while (!Done) { 5614 switch (*Str++) { 5615 default: Done = true; --Str; break; 5616 case 'I': 5617 RequiresICE = true; 5618 break; 5619 case 'S': 5620 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 5621 assert(!Signed && "Can't use 'S' modifier multiple times!"); 5622 Signed = true; 5623 break; 5624 case 'U': 5625 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 5626 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 5627 Unsigned = true; 5628 break; 5629 case 'L': 5630 assert(HowLong <= 2 && "Can't have LLLL modifier"); 5631 ++HowLong; 5632 break; 5633 } 5634 } 5635 5636 QualType Type; 5637 5638 // Read the base type. 5639 switch (*Str++) { 5640 default: assert(0 && "Unknown builtin type letter!"); 5641 case 'v': 5642 assert(HowLong == 0 && !Signed && !Unsigned && 5643 "Bad modifiers used with 'v'!"); 5644 Type = Context.VoidTy; 5645 break; 5646 case 'f': 5647 assert(HowLong == 0 && !Signed && !Unsigned && 5648 "Bad modifiers used with 'f'!"); 5649 Type = Context.FloatTy; 5650 break; 5651 case 'd': 5652 assert(HowLong < 2 && !Signed && !Unsigned && 5653 "Bad modifiers used with 'd'!"); 5654 if (HowLong) 5655 Type = Context.LongDoubleTy; 5656 else 5657 Type = Context.DoubleTy; 5658 break; 5659 case 's': 5660 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 5661 if (Unsigned) 5662 Type = Context.UnsignedShortTy; 5663 else 5664 Type = Context.ShortTy; 5665 break; 5666 case 'i': 5667 if (HowLong == 3) 5668 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 5669 else if (HowLong == 2) 5670 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 5671 else if (HowLong == 1) 5672 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 5673 else 5674 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 5675 break; 5676 case 'c': 5677 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 5678 if (Signed) 5679 Type = Context.SignedCharTy; 5680 else if (Unsigned) 5681 Type = Context.UnsignedCharTy; 5682 else 5683 Type = Context.CharTy; 5684 break; 5685 case 'b': // boolean 5686 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 5687 Type = Context.BoolTy; 5688 break; 5689 case 'z': // size_t. 5690 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 5691 Type = Context.getSizeType(); 5692 break; 5693 case 'F': 5694 Type = Context.getCFConstantStringType(); 5695 break; 5696 case 'G': 5697 Type = Context.getObjCIdType(); 5698 break; 5699 case 'H': 5700 Type = Context.getObjCSelType(); 5701 break; 5702 case 'a': 5703 Type = Context.getBuiltinVaListType(); 5704 assert(!Type.isNull() && "builtin va list type not initialized!"); 5705 break; 5706 case 'A': 5707 // This is a "reference" to a va_list; however, what exactly 5708 // this means depends on how va_list is defined. There are two 5709 // different kinds of va_list: ones passed by value, and ones 5710 // passed by reference. An example of a by-value va_list is 5711 // x86, where va_list is a char*. An example of by-ref va_list 5712 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 5713 // we want this argument to be a char*&; for x86-64, we want 5714 // it to be a __va_list_tag*. 5715 Type = Context.getBuiltinVaListType(); 5716 assert(!Type.isNull() && "builtin va list type not initialized!"); 5717 if (Type->isArrayType()) 5718 Type = Context.getArrayDecayedType(Type); 5719 else 5720 Type = Context.getLValueReferenceType(Type); 5721 break; 5722 case 'V': { 5723 char *End; 5724 unsigned NumElements = strtoul(Str, &End, 10); 5725 assert(End != Str && "Missing vector size"); 5726 Str = End; 5727 5728 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, 5729 RequiresICE, false); 5730 assert(!RequiresICE && "Can't require vector ICE"); 5731 5732 // TODO: No way to make AltiVec vectors in builtins yet. 5733 Type = Context.getVectorType(ElementType, NumElements, 5734 VectorType::GenericVector); 5735 break; 5736 } 5737 case 'X': { 5738 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, RequiresICE, 5739 false); 5740 assert(!RequiresICE && "Can't require complex ICE"); 5741 Type = Context.getComplexType(ElementType); 5742 break; 5743 } 5744 case 'P': 5745 Type = Context.getFILEType(); 5746 if (Type.isNull()) { 5747 Error = ASTContext::GE_Missing_stdio; 5748 return QualType(); 5749 } 5750 break; 5751 case 'J': 5752 if (Signed) 5753 Type = Context.getsigjmp_bufType(); 5754 else 5755 Type = Context.getjmp_bufType(); 5756 5757 if (Type.isNull()) { 5758 Error = ASTContext::GE_Missing_setjmp; 5759 return QualType(); 5760 } 5761 break; 5762 } 5763 5764 // If there are modifiers and if we're allowed to parse them, go for it. 5765 Done = !AllowTypeModifiers; 5766 while (!Done) { 5767 switch (char c = *Str++) { 5768 default: Done = true; --Str; break; 5769 case '*': 5770 case '&': { 5771 // Both pointers and references can have their pointee types 5772 // qualified with an address space. 5773 char *End; 5774 unsigned AddrSpace = strtoul(Str, &End, 10); 5775 if (End != Str && AddrSpace != 0) { 5776 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 5777 Str = End; 5778 } 5779 if (c == '*') 5780 Type = Context.getPointerType(Type); 5781 else 5782 Type = Context.getLValueReferenceType(Type); 5783 break; 5784 } 5785 // FIXME: There's no way to have a built-in with an rvalue ref arg. 5786 case 'C': 5787 Type = Type.withConst(); 5788 break; 5789 case 'D': 5790 Type = Context.getVolatileType(Type); 5791 break; 5792 } 5793 } 5794 5795 assert((!RequiresICE || Type->isIntegralOrEnumerationType()) && 5796 "Integer constant 'I' type must be an integer"); 5797 5798 return Type; 5799} 5800 5801/// GetBuiltinType - Return the type for the specified builtin. 5802QualType ASTContext::GetBuiltinType(unsigned Id, 5803 GetBuiltinTypeError &Error, 5804 unsigned *IntegerConstantArgs) const { 5805 const char *TypeStr = BuiltinInfo.GetTypeString(Id); 5806 5807 llvm::SmallVector<QualType, 8> ArgTypes; 5808 5809 bool RequiresICE = false; 5810 Error = GE_None; 5811 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error, 5812 RequiresICE, true); 5813 if (Error != GE_None) 5814 return QualType(); 5815 5816 assert(!RequiresICE && "Result of intrinsic cannot be required to be an ICE"); 5817 5818 while (TypeStr[0] && TypeStr[0] != '.') { 5819 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error, RequiresICE, true); 5820 if (Error != GE_None) 5821 return QualType(); 5822 5823 // If this argument is required to be an IntegerConstantExpression and the 5824 // caller cares, fill in the bitmask we return. 5825 if (RequiresICE && IntegerConstantArgs) 5826 *IntegerConstantArgs |= 1 << ArgTypes.size(); 5827 5828 // Do array -> pointer decay. The builtin should use the decayed type. 5829 if (Ty->isArrayType()) 5830 Ty = getArrayDecayedType(Ty); 5831 5832 ArgTypes.push_back(Ty); 5833 } 5834 5835 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 5836 "'.' should only occur at end of builtin type list!"); 5837 5838 FunctionType::ExtInfo EI; 5839 if (BuiltinInfo.isNoReturn(Id)) EI = EI.withNoReturn(true); 5840 5841 bool Variadic = (TypeStr[0] == '.'); 5842 5843 // We really shouldn't be making a no-proto type here, especially in C++. 5844 if (ArgTypes.empty() && Variadic) 5845 return getFunctionNoProtoType(ResType, EI); 5846 5847 FunctionProtoType::ExtProtoInfo EPI; 5848 EPI.ExtInfo = EI; 5849 EPI.Variadic = Variadic; 5850 5851 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), EPI); 5852} 5853 5854GVALinkage ASTContext::GetGVALinkageForFunction(const FunctionDecl *FD) { 5855 GVALinkage External = GVA_StrongExternal; 5856 5857 Linkage L = FD->getLinkage(); 5858 switch (L) { 5859 case NoLinkage: 5860 case InternalLinkage: 5861 case UniqueExternalLinkage: 5862 return GVA_Internal; 5863 5864 case ExternalLinkage: 5865 switch (FD->getTemplateSpecializationKind()) { 5866 case TSK_Undeclared: 5867 case TSK_ExplicitSpecialization: 5868 External = GVA_StrongExternal; 5869 break; 5870 5871 case TSK_ExplicitInstantiationDefinition: 5872 return GVA_ExplicitTemplateInstantiation; 5873 5874 case TSK_ExplicitInstantiationDeclaration: 5875 case TSK_ImplicitInstantiation: 5876 External = GVA_TemplateInstantiation; 5877 break; 5878 } 5879 } 5880 5881 if (!FD->isInlined()) 5882 return External; 5883 5884 if (!getLangOptions().CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 5885 // GNU or C99 inline semantics. Determine whether this symbol should be 5886 // externally visible. 5887 if (FD->isInlineDefinitionExternallyVisible()) 5888 return External; 5889 5890 // C99 inline semantics, where the symbol is not externally visible. 5891 return GVA_C99Inline; 5892 } 5893 5894 // C++0x [temp.explicit]p9: 5895 // [ Note: The intent is that an inline function that is the subject of 5896 // an explicit instantiation declaration will still be implicitly 5897 // instantiated when used so that the body can be considered for 5898 // inlining, but that no out-of-line copy of the inline function would be 5899 // generated in the translation unit. -- end note ] 5900 if (FD->getTemplateSpecializationKind() 5901 == TSK_ExplicitInstantiationDeclaration) 5902 return GVA_C99Inline; 5903 5904 return GVA_CXXInline; 5905} 5906 5907GVALinkage ASTContext::GetGVALinkageForVariable(const VarDecl *VD) { 5908 // If this is a static data member, compute the kind of template 5909 // specialization. Otherwise, this variable is not part of a 5910 // template. 5911 TemplateSpecializationKind TSK = TSK_Undeclared; 5912 if (VD->isStaticDataMember()) 5913 TSK = VD->getTemplateSpecializationKind(); 5914 5915 Linkage L = VD->getLinkage(); 5916 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 5917 VD->getType()->getLinkage() == UniqueExternalLinkage) 5918 L = UniqueExternalLinkage; 5919 5920 switch (L) { 5921 case NoLinkage: 5922 case InternalLinkage: 5923 case UniqueExternalLinkage: 5924 return GVA_Internal; 5925 5926 case ExternalLinkage: 5927 switch (TSK) { 5928 case TSK_Undeclared: 5929 case TSK_ExplicitSpecialization: 5930 return GVA_StrongExternal; 5931 5932 case TSK_ExplicitInstantiationDeclaration: 5933 llvm_unreachable("Variable should not be instantiated"); 5934 // Fall through to treat this like any other instantiation. 5935 5936 case TSK_ExplicitInstantiationDefinition: 5937 return GVA_ExplicitTemplateInstantiation; 5938 5939 case TSK_ImplicitInstantiation: 5940 return GVA_TemplateInstantiation; 5941 } 5942 } 5943 5944 return GVA_StrongExternal; 5945} 5946 5947bool ASTContext::DeclMustBeEmitted(const Decl *D) { 5948 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 5949 if (!VD->isFileVarDecl()) 5950 return false; 5951 } else if (!isa<FunctionDecl>(D)) 5952 return false; 5953 5954 // Weak references don't produce any output by themselves. 5955 if (D->hasAttr<WeakRefAttr>()) 5956 return false; 5957 5958 // Aliases and used decls are required. 5959 if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>()) 5960 return true; 5961 5962 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 5963 // Forward declarations aren't required. 5964 if (!FD->isThisDeclarationADefinition()) 5965 return false; 5966 5967 // Constructors and destructors are required. 5968 if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>()) 5969 return true; 5970 5971 // The key function for a class is required. 5972 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 5973 const CXXRecordDecl *RD = MD->getParent(); 5974 if (MD->isOutOfLine() && RD->isDynamicClass()) { 5975 const CXXMethodDecl *KeyFunc = getKeyFunction(RD); 5976 if (KeyFunc && KeyFunc->getCanonicalDecl() == MD->getCanonicalDecl()) 5977 return true; 5978 } 5979 } 5980 5981 GVALinkage Linkage = GetGVALinkageForFunction(FD); 5982 5983 // static, static inline, always_inline, and extern inline functions can 5984 // always be deferred. Normal inline functions can be deferred in C99/C++. 5985 // Implicit template instantiations can also be deferred in C++. 5986 if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 5987 Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 5988 return false; 5989 return true; 5990 } 5991 5992 const VarDecl *VD = cast<VarDecl>(D); 5993 assert(VD->isFileVarDecl() && "Expected file scoped var"); 5994 5995 if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) 5996 return false; 5997 5998 // Structs that have non-trivial constructors or destructors are required. 5999 6000 // FIXME: Handle references. 6001 if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { 6002 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 6003 if (RD->hasDefinition() && 6004 (!RD->hasTrivialConstructor() || !RD->hasTrivialDestructor())) 6005 return true; 6006 } 6007 } 6008 6009 GVALinkage L = GetGVALinkageForVariable(VD); 6010 if (L == GVA_Internal || L == GVA_TemplateInstantiation) { 6011 if (!(VD->getInit() && VD->getInit()->HasSideEffects(*this))) 6012 return false; 6013 } 6014 6015 return true; 6016} 6017 6018CallingConv ASTContext::getDefaultMethodCallConv() { 6019 // Pass through to the C++ ABI object 6020 return ABI->getDefaultMethodCallConv(); 6021} 6022 6023bool ASTContext::isNearlyEmpty(const CXXRecordDecl *RD) const { 6024 // Pass through to the C++ ABI object 6025 return ABI->isNearlyEmpty(RD); 6026} 6027 6028MangleContext *ASTContext::createMangleContext() { 6029 switch (Target.getCXXABI()) { 6030 case CXXABI_ARM: 6031 case CXXABI_Itanium: 6032 return createItaniumMangleContext(*this, getDiagnostics()); 6033 case CXXABI_Microsoft: 6034 return createMicrosoftMangleContext(*this, getDiagnostics()); 6035 } 6036 assert(0 && "Unsupported ABI"); 6037 return 0; 6038} 6039 6040CXXABI::~CXXABI() {} 6041