ASTContext.cpp revision 071cc7deffad608165b1ddd5263e8bf181861520
1baa3858d3f5d128a5c8466b700098109edcad5f2repo sync//===--- ASTContext.cpp - Context to hold long-lived AST nodes ------------===// 2baa3858d3f5d128a5c8466b700098109edcad5f2repo sync// 3baa3858d3f5d128a5c8466b700098109edcad5f2repo sync// The LLVM Compiler Infrastructure 4baa3858d3f5d128a5c8466b700098109edcad5f2repo sync// 5baa3858d3f5d128a5c8466b700098109edcad5f2repo sync// This file is distributed under the University of Illinois Open Source 6baa3858d3f5d128a5c8466b700098109edcad5f2repo sync// License. See LICENSE.TXT for details. 7baa3858d3f5d128a5c8466b700098109edcad5f2repo sync// 8baa3858d3f5d128a5c8466b700098109edcad5f2repo sync//===----------------------------------------------------------------------===// 9baa3858d3f5d128a5c8466b700098109edcad5f2repo sync// 10// This file implements the ASTContext interface. 11// 12//===----------------------------------------------------------------------===// 13 14#include "clang/AST/ASTContext.h" 15#include "clang/AST/CharUnits.h" 16#include "clang/AST/DeclCXX.h" 17#include "clang/AST/DeclObjC.h" 18#include "clang/AST/DeclTemplate.h" 19#include "clang/AST/TypeLoc.h" 20#include "clang/AST/Expr.h" 21#include "clang/AST/ExprCXX.h" 22#include "clang/AST/ExternalASTSource.h" 23#include "clang/AST/RecordLayout.h" 24#include "clang/Basic/Builtins.h" 25#include "clang/Basic/SourceManager.h" 26#include "clang/Basic/TargetInfo.h" 27#include "llvm/ADT/SmallString.h" 28#include "llvm/ADT/StringExtras.h" 29#include "llvm/Support/MathExtras.h" 30#include "llvm/Support/raw_ostream.h" 31#include "CXXABI.h" 32 33using namespace clang; 34 35unsigned ASTContext::NumImplicitDefaultConstructors; 36unsigned ASTContext::NumImplicitDefaultConstructorsDeclared; 37unsigned ASTContext::NumImplicitCopyConstructors; 38unsigned ASTContext::NumImplicitCopyConstructorsDeclared; 39unsigned ASTContext::NumImplicitCopyAssignmentOperators; 40unsigned ASTContext::NumImplicitCopyAssignmentOperatorsDeclared; 41unsigned ASTContext::NumImplicitDestructors; 42unsigned ASTContext::NumImplicitDestructorsDeclared; 43 44enum FloatingRank { 45 FloatRank, DoubleRank, LongDoubleRank 46}; 47 48void 49ASTContext::CanonicalTemplateTemplateParm::Profile(llvm::FoldingSetNodeID &ID, 50 TemplateTemplateParmDecl *Parm) { 51 ID.AddInteger(Parm->getDepth()); 52 ID.AddInteger(Parm->getPosition()); 53 // FIXME: Parameter pack 54 55 TemplateParameterList *Params = Parm->getTemplateParameters(); 56 ID.AddInteger(Params->size()); 57 for (TemplateParameterList::const_iterator P = Params->begin(), 58 PEnd = Params->end(); 59 P != PEnd; ++P) { 60 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) { 61 ID.AddInteger(0); 62 ID.AddBoolean(TTP->isParameterPack()); 63 continue; 64 } 65 66 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 67 ID.AddInteger(1); 68 // FIXME: Parameter pack 69 ID.AddPointer(NTTP->getType().getAsOpaquePtr()); 70 continue; 71 } 72 73 TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P); 74 ID.AddInteger(2); 75 Profile(ID, TTP); 76 } 77} 78 79TemplateTemplateParmDecl * 80ASTContext::getCanonicalTemplateTemplateParmDecl( 81 TemplateTemplateParmDecl *TTP) { 82 // Check if we already have a canonical template template parameter. 83 llvm::FoldingSetNodeID ID; 84 CanonicalTemplateTemplateParm::Profile(ID, TTP); 85 void *InsertPos = 0; 86 CanonicalTemplateTemplateParm *Canonical 87 = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 88 if (Canonical) 89 return Canonical->getParam(); 90 91 // Build a canonical template parameter list. 92 TemplateParameterList *Params = TTP->getTemplateParameters(); 93 llvm::SmallVector<NamedDecl *, 4> CanonParams; 94 CanonParams.reserve(Params->size()); 95 for (TemplateParameterList::const_iterator P = Params->begin(), 96 PEnd = Params->end(); 97 P != PEnd; ++P) { 98 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) 99 CanonParams.push_back( 100 TemplateTypeParmDecl::Create(*this, getTranslationUnitDecl(), 101 SourceLocation(), TTP->getDepth(), 102 TTP->getIndex(), 0, false, 103 TTP->isParameterPack())); 104 else if (NonTypeTemplateParmDecl *NTTP 105 = dyn_cast<NonTypeTemplateParmDecl>(*P)) 106 CanonParams.push_back( 107 NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 108 SourceLocation(), NTTP->getDepth(), 109 NTTP->getPosition(), 0, 110 getCanonicalType(NTTP->getType()), 111 0)); 112 else 113 CanonParams.push_back(getCanonicalTemplateTemplateParmDecl( 114 cast<TemplateTemplateParmDecl>(*P))); 115 } 116 117 TemplateTemplateParmDecl *CanonTTP 118 = TemplateTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 119 SourceLocation(), TTP->getDepth(), 120 TTP->getPosition(), 0, 121 TemplateParameterList::Create(*this, SourceLocation(), 122 SourceLocation(), 123 CanonParams.data(), 124 CanonParams.size(), 125 SourceLocation())); 126 127 // Get the new insert position for the node we care about. 128 Canonical = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 129 assert(Canonical == 0 && "Shouldn't be in the map!"); 130 (void)Canonical; 131 132 // Create the canonical template template parameter entry. 133 Canonical = new (*this) CanonicalTemplateTemplateParm(CanonTTP); 134 CanonTemplateTemplateParms.InsertNode(Canonical, InsertPos); 135 return CanonTTP; 136} 137 138CXXABI *ASTContext::createCXXABI(const TargetInfo &T) { 139 if (!LangOpts.CPlusPlus) return NULL; 140 if (T.getCXXABI() == "microsoft") 141 return CreateMicrosoftCXXABI(*this); 142 else 143 return CreateItaniumCXXABI(*this); 144} 145 146ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 147 const TargetInfo &t, 148 IdentifierTable &idents, SelectorTable &sels, 149 Builtin::Context &builtins, 150 unsigned size_reserve) : 151 TemplateSpecializationTypes(this_()), 152 DependentTemplateSpecializationTypes(this_()), 153 GlobalNestedNameSpecifier(0), IsInt128Installed(false), 154 CFConstantStringTypeDecl(0), NSConstantStringTypeDecl(0), 155 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 156 sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 157 NullTypeSourceInfo(QualType()), 158 SourceMgr(SM), LangOpts(LOpts), ABI(createCXXABI(t)), Target(t), 159 Idents(idents), Selectors(sels), 160 BuiltinInfo(builtins), 161 DeclarationNames(*this), 162 ExternalSource(0), PrintingPolicy(LOpts), 163 LastSDM(0, 0), 164 UniqueBlockByRefTypeID(0), UniqueBlockParmTypeID(0) { 165 ObjCIdRedefinitionType = QualType(); 166 ObjCClassRedefinitionType = QualType(); 167 ObjCSelRedefinitionType = QualType(); 168 if (size_reserve > 0) Types.reserve(size_reserve); 169 TUDecl = TranslationUnitDecl::Create(*this); 170 InitBuiltinTypes(); 171} 172 173ASTContext::~ASTContext() { 174 // Release the DenseMaps associated with DeclContext objects. 175 // FIXME: Is this the ideal solution? 176 ReleaseDeclContextMaps(); 177 178 // Call all of the deallocation functions. 179 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 180 Deallocations[I].first(Deallocations[I].second); 181 182 // Release all of the memory associated with overridden C++ methods. 183 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 184 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 185 OM != OMEnd; ++OM) 186 OM->second.Destroy(); 187 188 // ASTRecordLayout objects in ASTRecordLayouts must always be destroyed 189 // because they can contain DenseMaps. 190 for (llvm::DenseMap<const ObjCContainerDecl*, 191 const ASTRecordLayout*>::iterator 192 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) 193 // Increment in loop to prevent using deallocated memory. 194 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 195 R->Destroy(*this); 196 197 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 198 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 199 // Increment in loop to prevent using deallocated memory. 200 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 201 R->Destroy(*this); 202 } 203 } 204 205void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 206 Deallocations.push_back(std::make_pair(Callback, Data)); 207} 208 209void 210ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 211 ExternalSource.reset(Source.take()); 212} 213 214void ASTContext::PrintStats() const { 215 fprintf(stderr, "*** AST Context Stats:\n"); 216 fprintf(stderr, " %d types total.\n", (int)Types.size()); 217 218 unsigned counts[] = { 219#define TYPE(Name, Parent) 0, 220#define ABSTRACT_TYPE(Name, Parent) 221#include "clang/AST/TypeNodes.def" 222 0 // Extra 223 }; 224 225 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 226 Type *T = Types[i]; 227 counts[(unsigned)T->getTypeClass()]++; 228 } 229 230 unsigned Idx = 0; 231 unsigned TotalBytes = 0; 232#define TYPE(Name, Parent) \ 233 if (counts[Idx]) \ 234 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 235 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 236 ++Idx; 237#define ABSTRACT_TYPE(Name, Parent) 238#include "clang/AST/TypeNodes.def" 239 240 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 241 242 // Implicit special member functions. 243 fprintf(stderr, " %u/%u implicit default constructors created\n", 244 NumImplicitDefaultConstructorsDeclared, 245 NumImplicitDefaultConstructors); 246 fprintf(stderr, " %u/%u implicit copy constructors created\n", 247 NumImplicitCopyConstructorsDeclared, 248 NumImplicitCopyConstructors); 249 fprintf(stderr, " %u/%u implicit copy assignment operators created\n", 250 NumImplicitCopyAssignmentOperatorsDeclared, 251 NumImplicitCopyAssignmentOperators); 252 fprintf(stderr, " %u/%u implicit destructors created\n", 253 NumImplicitDestructorsDeclared, NumImplicitDestructors); 254 255 if (ExternalSource.get()) { 256 fprintf(stderr, "\n"); 257 ExternalSource->PrintStats(); 258 } 259 260 BumpAlloc.PrintStats(); 261} 262 263 264void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 265 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 266 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 267 Types.push_back(Ty); 268} 269 270void ASTContext::InitBuiltinTypes() { 271 assert(VoidTy.isNull() && "Context reinitialized?"); 272 273 // C99 6.2.5p19. 274 InitBuiltinType(VoidTy, BuiltinType::Void); 275 276 // C99 6.2.5p2. 277 InitBuiltinType(BoolTy, BuiltinType::Bool); 278 // C99 6.2.5p3. 279 if (LangOpts.CharIsSigned) 280 InitBuiltinType(CharTy, BuiltinType::Char_S); 281 else 282 InitBuiltinType(CharTy, BuiltinType::Char_U); 283 // C99 6.2.5p4. 284 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 285 InitBuiltinType(ShortTy, BuiltinType::Short); 286 InitBuiltinType(IntTy, BuiltinType::Int); 287 InitBuiltinType(LongTy, BuiltinType::Long); 288 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 289 290 // C99 6.2.5p6. 291 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 292 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 293 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 294 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 295 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 296 297 // C99 6.2.5p10. 298 InitBuiltinType(FloatTy, BuiltinType::Float); 299 InitBuiltinType(DoubleTy, BuiltinType::Double); 300 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 301 302 // GNU extension, 128-bit integers. 303 InitBuiltinType(Int128Ty, BuiltinType::Int128); 304 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 305 306 if (LangOpts.CPlusPlus) // C++ 3.9.1p5 307 InitBuiltinType(WCharTy, BuiltinType::WChar); 308 else // C99 309 WCharTy = getFromTargetType(Target.getWCharType()); 310 311 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 312 InitBuiltinType(Char16Ty, BuiltinType::Char16); 313 else // C99 314 Char16Ty = getFromTargetType(Target.getChar16Type()); 315 316 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 317 InitBuiltinType(Char32Ty, BuiltinType::Char32); 318 else // C99 319 Char32Ty = getFromTargetType(Target.getChar32Type()); 320 321 // Placeholder type for functions. 322 InitBuiltinType(OverloadTy, BuiltinType::Overload); 323 324 // Placeholder type for type-dependent expressions whose type is 325 // completely unknown. No code should ever check a type against 326 // DependentTy and users should never see it; however, it is here to 327 // help diagnose failures to properly check for type-dependent 328 // expressions. 329 InitBuiltinType(DependentTy, BuiltinType::Dependent); 330 331 // Placeholder type for C++0x auto declarations whose real type has 332 // not yet been deduced. 333 InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 334 335 // C99 6.2.5p11. 336 FloatComplexTy = getComplexType(FloatTy); 337 DoubleComplexTy = getComplexType(DoubleTy); 338 LongDoubleComplexTy = getComplexType(LongDoubleTy); 339 340 BuiltinVaListType = QualType(); 341 342 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 343 ObjCIdTypedefType = QualType(); 344 ObjCClassTypedefType = QualType(); 345 ObjCSelTypedefType = QualType(); 346 347 // Builtin types for 'id', 'Class', and 'SEL'. 348 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 349 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 350 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 351 352 ObjCConstantStringType = QualType(); 353 354 // void * type 355 VoidPtrTy = getPointerType(VoidTy); 356 357 // nullptr type (C++0x 2.14.7) 358 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 359} 360 361MemberSpecializationInfo * 362ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 363 assert(Var->isStaticDataMember() && "Not a static data member"); 364 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 365 = InstantiatedFromStaticDataMember.find(Var); 366 if (Pos == InstantiatedFromStaticDataMember.end()) 367 return 0; 368 369 return Pos->second; 370} 371 372void 373ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 374 TemplateSpecializationKind TSK, 375 SourceLocation PointOfInstantiation) { 376 assert(Inst->isStaticDataMember() && "Not a static data member"); 377 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 378 assert(!InstantiatedFromStaticDataMember[Inst] && 379 "Already noted what static data member was instantiated from"); 380 InstantiatedFromStaticDataMember[Inst] 381 = new (*this) MemberSpecializationInfo(Tmpl, TSK, PointOfInstantiation); 382} 383 384NamedDecl * 385ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 386 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 387 = InstantiatedFromUsingDecl.find(UUD); 388 if (Pos == InstantiatedFromUsingDecl.end()) 389 return 0; 390 391 return Pos->second; 392} 393 394void 395ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 396 assert((isa<UsingDecl>(Pattern) || 397 isa<UnresolvedUsingValueDecl>(Pattern) || 398 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 399 "pattern decl is not a using decl"); 400 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 401 InstantiatedFromUsingDecl[Inst] = Pattern; 402} 403 404UsingShadowDecl * 405ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 406 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 407 = InstantiatedFromUsingShadowDecl.find(Inst); 408 if (Pos == InstantiatedFromUsingShadowDecl.end()) 409 return 0; 410 411 return Pos->second; 412} 413 414void 415ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 416 UsingShadowDecl *Pattern) { 417 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 418 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 419} 420 421FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 422 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 423 = InstantiatedFromUnnamedFieldDecl.find(Field); 424 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 425 return 0; 426 427 return Pos->second; 428} 429 430void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 431 FieldDecl *Tmpl) { 432 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 433 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 434 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 435 "Already noted what unnamed field was instantiated from"); 436 437 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 438} 439 440ASTContext::overridden_cxx_method_iterator 441ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 442 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 443 = OverriddenMethods.find(Method); 444 if (Pos == OverriddenMethods.end()) 445 return 0; 446 447 return Pos->second.begin(); 448} 449 450ASTContext::overridden_cxx_method_iterator 451ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 452 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 453 = OverriddenMethods.find(Method); 454 if (Pos == OverriddenMethods.end()) 455 return 0; 456 457 return Pos->second.end(); 458} 459 460unsigned 461ASTContext::overridden_methods_size(const CXXMethodDecl *Method) const { 462 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 463 = OverriddenMethods.find(Method); 464 if (Pos == OverriddenMethods.end()) 465 return 0; 466 467 return Pos->second.size(); 468} 469 470void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 471 const CXXMethodDecl *Overridden) { 472 OverriddenMethods[Method].push_back(Overridden); 473} 474 475//===----------------------------------------------------------------------===// 476// Type Sizing and Analysis 477//===----------------------------------------------------------------------===// 478 479/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 480/// scalar floating point type. 481const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 482 const BuiltinType *BT = T->getAs<BuiltinType>(); 483 assert(BT && "Not a floating point type!"); 484 switch (BT->getKind()) { 485 default: assert(0 && "Not a floating point type!"); 486 case BuiltinType::Float: return Target.getFloatFormat(); 487 case BuiltinType::Double: return Target.getDoubleFormat(); 488 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 489 } 490} 491 492/// getDeclAlign - Return a conservative estimate of the alignment of the 493/// specified decl. Note that bitfields do not have a valid alignment, so 494/// this method will assert on them. 495/// If @p RefAsPointee, references are treated like their underlying type 496/// (for alignof), else they're treated like pointers (for CodeGen). 497CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) { 498 unsigned Align = Target.getCharWidth(); 499 500 if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 501 Align = std::max(Align, AA->getMaxAlignment()); 502 503 if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 504 QualType T = VD->getType(); 505 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 506 if (RefAsPointee) 507 T = RT->getPointeeType(); 508 else 509 T = getPointerType(RT->getPointeeType()); 510 } 511 if (!T->isIncompleteType() && !T->isFunctionType()) { 512 unsigned MinWidth = Target.getLargeArrayMinWidth(); 513 unsigned ArrayAlign = Target.getLargeArrayAlign(); 514 if (isa<VariableArrayType>(T) && MinWidth != 0) 515 Align = std::max(Align, ArrayAlign); 516 if (ConstantArrayType *CT = dyn_cast<ConstantArrayType>(T)) { 517 unsigned Size = getTypeSize(CT); 518 if (MinWidth != 0 && MinWidth <= Size) 519 Align = std::max(Align, ArrayAlign); 520 } 521 // Incomplete or function types default to 1. 522 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 523 T = cast<ArrayType>(T)->getElementType(); 524 525 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 526 } 527 if (const FieldDecl *FD = dyn_cast<FieldDecl>(VD)) { 528 // In the case of a field in a packed struct, we want the minimum 529 // of the alignment of the field and the alignment of the struct. 530 Align = std::min(Align, 531 getPreferredTypeAlign(FD->getParent()->getTypeForDecl())); 532 } 533 } 534 535 return CharUnits::fromQuantity(Align / Target.getCharWidth()); 536} 537 538std::pair<CharUnits, CharUnits> 539ASTContext::getTypeInfoInChars(const Type *T) { 540 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 541 return std::make_pair(CharUnits::fromQuantity(Info.first / getCharWidth()), 542 CharUnits::fromQuantity(Info.second / getCharWidth())); 543} 544 545std::pair<CharUnits, CharUnits> 546ASTContext::getTypeInfoInChars(QualType T) { 547 return getTypeInfoInChars(T.getTypePtr()); 548} 549 550/// getTypeSize - Return the size of the specified type, in bits. This method 551/// does not work on incomplete types. 552/// 553/// FIXME: Pointers into different addr spaces could have different sizes and 554/// alignment requirements: getPointerInfo should take an AddrSpace, this 555/// should take a QualType, &c. 556std::pair<uint64_t, unsigned> 557ASTContext::getTypeInfo(const Type *T) { 558 uint64_t Width=0; 559 unsigned Align=8; 560 switch (T->getTypeClass()) { 561#define TYPE(Class, Base) 562#define ABSTRACT_TYPE(Class, Base) 563#define NON_CANONICAL_TYPE(Class, Base) 564#define DEPENDENT_TYPE(Class, Base) case Type::Class: 565#include "clang/AST/TypeNodes.def" 566 assert(false && "Should not see dependent types"); 567 break; 568 569 case Type::FunctionNoProto: 570 case Type::FunctionProto: 571 // GCC extension: alignof(function) = 32 bits 572 Width = 0; 573 Align = 32; 574 break; 575 576 case Type::IncompleteArray: 577 case Type::VariableArray: 578 Width = 0; 579 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 580 break; 581 582 case Type::ConstantArray: { 583 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 584 585 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 586 Width = EltInfo.first*CAT->getSize().getZExtValue(); 587 Align = EltInfo.second; 588 break; 589 } 590 case Type::ExtVector: 591 case Type::Vector: { 592 const VectorType *VT = cast<VectorType>(T); 593 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 594 Width = EltInfo.first*VT->getNumElements(); 595 Align = Width; 596 // If the alignment is not a power of 2, round up to the next power of 2. 597 // This happens for non-power-of-2 length vectors. 598 if (Align & (Align-1)) { 599 Align = llvm::NextPowerOf2(Align); 600 Width = llvm::RoundUpToAlignment(Width, Align); 601 } 602 break; 603 } 604 605 case Type::Builtin: 606 switch (cast<BuiltinType>(T)->getKind()) { 607 default: assert(0 && "Unknown builtin type!"); 608 case BuiltinType::Void: 609 // GCC extension: alignof(void) = 8 bits. 610 Width = 0; 611 Align = 8; 612 break; 613 614 case BuiltinType::Bool: 615 Width = Target.getBoolWidth(); 616 Align = Target.getBoolAlign(); 617 break; 618 case BuiltinType::Char_S: 619 case BuiltinType::Char_U: 620 case BuiltinType::UChar: 621 case BuiltinType::SChar: 622 Width = Target.getCharWidth(); 623 Align = Target.getCharAlign(); 624 break; 625 case BuiltinType::WChar: 626 Width = Target.getWCharWidth(); 627 Align = Target.getWCharAlign(); 628 break; 629 case BuiltinType::Char16: 630 Width = Target.getChar16Width(); 631 Align = Target.getChar16Align(); 632 break; 633 case BuiltinType::Char32: 634 Width = Target.getChar32Width(); 635 Align = Target.getChar32Align(); 636 break; 637 case BuiltinType::UShort: 638 case BuiltinType::Short: 639 Width = Target.getShortWidth(); 640 Align = Target.getShortAlign(); 641 break; 642 case BuiltinType::UInt: 643 case BuiltinType::Int: 644 Width = Target.getIntWidth(); 645 Align = Target.getIntAlign(); 646 break; 647 case BuiltinType::ULong: 648 case BuiltinType::Long: 649 Width = Target.getLongWidth(); 650 Align = Target.getLongAlign(); 651 break; 652 case BuiltinType::ULongLong: 653 case BuiltinType::LongLong: 654 Width = Target.getLongLongWidth(); 655 Align = Target.getLongLongAlign(); 656 break; 657 case BuiltinType::Int128: 658 case BuiltinType::UInt128: 659 Width = 128; 660 Align = 128; // int128_t is 128-bit aligned on all targets. 661 break; 662 case BuiltinType::Float: 663 Width = Target.getFloatWidth(); 664 Align = Target.getFloatAlign(); 665 break; 666 case BuiltinType::Double: 667 Width = Target.getDoubleWidth(); 668 Align = Target.getDoubleAlign(); 669 break; 670 case BuiltinType::LongDouble: 671 Width = Target.getLongDoubleWidth(); 672 Align = Target.getLongDoubleAlign(); 673 break; 674 case BuiltinType::NullPtr: 675 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 676 Align = Target.getPointerAlign(0); // == sizeof(void*) 677 break; 678 case BuiltinType::ObjCId: 679 case BuiltinType::ObjCClass: 680 case BuiltinType::ObjCSel: 681 Width = Target.getPointerWidth(0); 682 Align = Target.getPointerAlign(0); 683 break; 684 } 685 break; 686 case Type::ObjCObjectPointer: 687 Width = Target.getPointerWidth(0); 688 Align = Target.getPointerAlign(0); 689 break; 690 case Type::BlockPointer: { 691 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 692 Width = Target.getPointerWidth(AS); 693 Align = Target.getPointerAlign(AS); 694 break; 695 } 696 case Type::LValueReference: 697 case Type::RValueReference: { 698 // alignof and sizeof should never enter this code path here, so we go 699 // the pointer route. 700 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 701 Width = Target.getPointerWidth(AS); 702 Align = Target.getPointerAlign(AS); 703 break; 704 } 705 case Type::Pointer: { 706 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 707 Width = Target.getPointerWidth(AS); 708 Align = Target.getPointerAlign(AS); 709 break; 710 } 711 case Type::MemberPointer: { 712 const MemberPointerType *MPT = cast<MemberPointerType>(T); 713 std::pair<uint64_t, unsigned> PtrDiffInfo = 714 getTypeInfo(getPointerDiffType()); 715 Width = PtrDiffInfo.first * ABI->getMemberPointerSize(MPT); 716 Align = PtrDiffInfo.second; 717 break; 718 } 719 case Type::Complex: { 720 // Complex types have the same alignment as their elements, but twice the 721 // size. 722 std::pair<uint64_t, unsigned> EltInfo = 723 getTypeInfo(cast<ComplexType>(T)->getElementType()); 724 Width = EltInfo.first*2; 725 Align = EltInfo.second; 726 break; 727 } 728 case Type::ObjCObject: 729 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 730 case Type::ObjCInterface: { 731 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 732 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 733 Width = Layout.getSize(); 734 Align = Layout.getAlignment(); 735 break; 736 } 737 case Type::Record: 738 case Type::Enum: { 739 const TagType *TT = cast<TagType>(T); 740 741 if (TT->getDecl()->isInvalidDecl()) { 742 Width = 1; 743 Align = 1; 744 break; 745 } 746 747 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 748 return getTypeInfo(ET->getDecl()->getIntegerType()); 749 750 const RecordType *RT = cast<RecordType>(TT); 751 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 752 Width = Layout.getSize(); 753 Align = Layout.getAlignment(); 754 break; 755 } 756 757 case Type::SubstTemplateTypeParm: 758 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 759 getReplacementType().getTypePtr()); 760 761 case Type::Typedef: { 762 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 763 if (const AlignedAttr *Aligned = Typedef->getAttr<AlignedAttr>()) { 764 Align = std::max(Aligned->getMaxAlignment(), 765 getTypeAlign(Typedef->getUnderlyingType().getTypePtr())); 766 Width = getTypeSize(Typedef->getUnderlyingType().getTypePtr()); 767 } else 768 return getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 769 break; 770 } 771 772 case Type::TypeOfExpr: 773 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 774 .getTypePtr()); 775 776 case Type::TypeOf: 777 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 778 779 case Type::Decltype: 780 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 781 .getTypePtr()); 782 783 case Type::Elaborated: 784 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 785 786 case Type::TemplateSpecialization: 787 assert(getCanonicalType(T) != T && 788 "Cannot request the size of a dependent type"); 789 // FIXME: this is likely to be wrong once we support template 790 // aliases, since a template alias could refer to a typedef that 791 // has an __aligned__ attribute on it. 792 return getTypeInfo(getCanonicalType(T)); 793 } 794 795 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 796 return std::make_pair(Width, Align); 797} 798 799/// getTypeSizeInChars - Return the size of the specified type, in characters. 800/// This method does not work on incomplete types. 801CharUnits ASTContext::getTypeSizeInChars(QualType T) { 802 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 803} 804CharUnits ASTContext::getTypeSizeInChars(const Type *T) { 805 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 806} 807 808/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 809/// characters. This method does not work on incomplete types. 810CharUnits ASTContext::getTypeAlignInChars(QualType T) { 811 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 812} 813CharUnits ASTContext::getTypeAlignInChars(const Type *T) { 814 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 815} 816 817/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 818/// type for the current target in bits. This can be different than the ABI 819/// alignment in cases where it is beneficial for performance to overalign 820/// a data type. 821unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 822 unsigned ABIAlign = getTypeAlign(T); 823 824 // Double and long long should be naturally aligned if possible. 825 if (const ComplexType* CT = T->getAs<ComplexType>()) 826 T = CT->getElementType().getTypePtr(); 827 if (T->isSpecificBuiltinType(BuiltinType::Double) || 828 T->isSpecificBuiltinType(BuiltinType::LongLong)) 829 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 830 831 return ABIAlign; 832} 833 834static void CollectLocalObjCIvars(ASTContext *Ctx, 835 const ObjCInterfaceDecl *OI, 836 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 837 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 838 E = OI->ivar_end(); I != E; ++I) { 839 ObjCIvarDecl *IVDecl = *I; 840 if (!IVDecl->isInvalidDecl()) 841 Fields.push_back(cast<FieldDecl>(IVDecl)); 842 } 843} 844 845void ASTContext::CollectObjCIvars(const ObjCInterfaceDecl *OI, 846 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 847 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 848 CollectObjCIvars(SuperClass, Fields); 849 CollectLocalObjCIvars(this, OI, Fields); 850} 851 852/// ShallowCollectObjCIvars - 853/// Collect all ivars, including those synthesized, in the current class. 854/// 855void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 856 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 857 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 858 E = OI->ivar_end(); I != E; ++I) { 859 Ivars.push_back(*I); 860 } 861 862 CollectNonClassIvars(OI, Ivars); 863} 864 865/// CollectNonClassIvars - 866/// This routine collects all other ivars which are not declared in the class. 867/// This includes synthesized ivars (via @synthesize) and those in 868// class's @implementation. 869/// 870void ASTContext::CollectNonClassIvars(const ObjCInterfaceDecl *OI, 871 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 872 // Find ivars declared in class extension. 873 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl; 874 CDecl = CDecl->getNextClassExtension()) { 875 for (ObjCCategoryDecl::ivar_iterator I = CDecl->ivar_begin(), 876 E = CDecl->ivar_end(); I != E; ++I) { 877 Ivars.push_back(*I); 878 } 879 } 880 881 // Also add any ivar defined in this class's implementation. This 882 // includes synthesized ivars. 883 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) { 884 for (ObjCImplementationDecl::ivar_iterator I = ImplDecl->ivar_begin(), 885 E = ImplDecl->ivar_end(); I != E; ++I) 886 Ivars.push_back(*I); 887 } 888} 889 890/// CollectInheritedProtocols - Collect all protocols in current class and 891/// those inherited by it. 892void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 893 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 894 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 895 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 896 PE = OI->protocol_end(); P != PE; ++P) { 897 ObjCProtocolDecl *Proto = (*P); 898 Protocols.insert(Proto); 899 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 900 PE = Proto->protocol_end(); P != PE; ++P) { 901 Protocols.insert(*P); 902 CollectInheritedProtocols(*P, Protocols); 903 } 904 } 905 906 // Categories of this Interface. 907 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 908 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 909 CollectInheritedProtocols(CDeclChain, Protocols); 910 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 911 while (SD) { 912 CollectInheritedProtocols(SD, Protocols); 913 SD = SD->getSuperClass(); 914 } 915 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 916 for (ObjCInterfaceDecl::protocol_iterator P = OC->protocol_begin(), 917 PE = OC->protocol_end(); P != PE; ++P) { 918 ObjCProtocolDecl *Proto = (*P); 919 Protocols.insert(Proto); 920 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 921 PE = Proto->protocol_end(); P != PE; ++P) 922 CollectInheritedProtocols(*P, Protocols); 923 } 924 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 925 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 926 PE = OP->protocol_end(); P != PE; ++P) { 927 ObjCProtocolDecl *Proto = (*P); 928 Protocols.insert(Proto); 929 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 930 PE = Proto->protocol_end(); P != PE; ++P) 931 CollectInheritedProtocols(*P, Protocols); 932 } 933 } 934} 935 936unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) { 937 unsigned count = 0; 938 // Count ivars declared in class extension. 939 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl; 940 CDecl = CDecl->getNextClassExtension()) 941 count += CDecl->ivar_size(); 942 943 // Count ivar defined in this class's implementation. This 944 // includes synthesized ivars. 945 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 946 count += ImplDecl->ivar_size(); 947 948 return count; 949} 950 951/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 952ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 953 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 954 I = ObjCImpls.find(D); 955 if (I != ObjCImpls.end()) 956 return cast<ObjCImplementationDecl>(I->second); 957 return 0; 958} 959/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 960ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 961 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 962 I = ObjCImpls.find(D); 963 if (I != ObjCImpls.end()) 964 return cast<ObjCCategoryImplDecl>(I->second); 965 return 0; 966} 967 968/// \brief Set the implementation of ObjCInterfaceDecl. 969void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 970 ObjCImplementationDecl *ImplD) { 971 assert(IFaceD && ImplD && "Passed null params"); 972 ObjCImpls[IFaceD] = ImplD; 973} 974/// \brief Set the implementation of ObjCCategoryDecl. 975void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 976 ObjCCategoryImplDecl *ImplD) { 977 assert(CatD && ImplD && "Passed null params"); 978 ObjCImpls[CatD] = ImplD; 979} 980 981/// \brief Allocate an uninitialized TypeSourceInfo. 982/// 983/// The caller should initialize the memory held by TypeSourceInfo using 984/// the TypeLoc wrappers. 985/// 986/// \param T the type that will be the basis for type source info. This type 987/// should refer to how the declarator was written in source code, not to 988/// what type semantic analysis resolved the declarator to. 989TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 990 unsigned DataSize) { 991 if (!DataSize) 992 DataSize = TypeLoc::getFullDataSizeForType(T); 993 else 994 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 995 "incorrect data size provided to CreateTypeSourceInfo!"); 996 997 TypeSourceInfo *TInfo = 998 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 999 new (TInfo) TypeSourceInfo(T); 1000 return TInfo; 1001} 1002 1003TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1004 SourceLocation L) { 1005 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1006 DI->getTypeLoc().initialize(L); 1007 return DI; 1008} 1009 1010const ASTRecordLayout & 1011ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 1012 return getObjCLayout(D, 0); 1013} 1014 1015const ASTRecordLayout & 1016ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 1017 return getObjCLayout(D->getClassInterface(), D); 1018} 1019 1020//===----------------------------------------------------------------------===// 1021// Type creation/memoization methods 1022//===----------------------------------------------------------------------===// 1023 1024QualType ASTContext::getExtQualType(const Type *TypeNode, Qualifiers Quals) { 1025 unsigned Fast = Quals.getFastQualifiers(); 1026 Quals.removeFastQualifiers(); 1027 1028 // Check if we've already instantiated this type. 1029 llvm::FoldingSetNodeID ID; 1030 ExtQuals::Profile(ID, TypeNode, Quals); 1031 void *InsertPos = 0; 1032 if (ExtQuals *EQ = ExtQualNodes.FindNodeOrInsertPos(ID, InsertPos)) { 1033 assert(EQ->getQualifiers() == Quals); 1034 QualType T = QualType(EQ, Fast); 1035 return T; 1036 } 1037 1038 ExtQuals *New = new (*this, TypeAlignment) ExtQuals(*this, TypeNode, Quals); 1039 ExtQualNodes.InsertNode(New, InsertPos); 1040 QualType T = QualType(New, Fast); 1041 return T; 1042} 1043 1044QualType ASTContext::getVolatileType(QualType T) { 1045 QualType CanT = getCanonicalType(T); 1046 if (CanT.isVolatileQualified()) return T; 1047 1048 QualifierCollector Quals; 1049 const Type *TypeNode = Quals.strip(T); 1050 Quals.addVolatile(); 1051 1052 return getExtQualType(TypeNode, Quals); 1053} 1054 1055QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 1056 QualType CanT = getCanonicalType(T); 1057 if (CanT.getAddressSpace() == AddressSpace) 1058 return T; 1059 1060 // If we are composing extended qualifiers together, merge together 1061 // into one ExtQuals node. 1062 QualifierCollector Quals; 1063 const Type *TypeNode = Quals.strip(T); 1064 1065 // If this type already has an address space specified, it cannot get 1066 // another one. 1067 assert(!Quals.hasAddressSpace() && 1068 "Type cannot be in multiple addr spaces!"); 1069 Quals.addAddressSpace(AddressSpace); 1070 1071 return getExtQualType(TypeNode, Quals); 1072} 1073 1074QualType ASTContext::getObjCGCQualType(QualType T, 1075 Qualifiers::GC GCAttr) { 1076 QualType CanT = getCanonicalType(T); 1077 if (CanT.getObjCGCAttr() == GCAttr) 1078 return T; 1079 1080 if (T->isPointerType()) { 1081 QualType Pointee = T->getAs<PointerType>()->getPointeeType(); 1082 if (Pointee->isAnyPointerType()) { 1083 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1084 return getPointerType(ResultType); 1085 } 1086 } 1087 1088 // If we are composing extended qualifiers together, merge together 1089 // into one ExtQuals node. 1090 QualifierCollector Quals; 1091 const Type *TypeNode = Quals.strip(T); 1092 1093 // If this type already has an ObjCGC specified, it cannot get 1094 // another one. 1095 assert(!Quals.hasObjCGCAttr() && 1096 "Type cannot have multiple ObjCGCs!"); 1097 Quals.addObjCGCAttr(GCAttr); 1098 1099 return getExtQualType(TypeNode, Quals); 1100} 1101 1102static QualType getExtFunctionType(ASTContext& Context, QualType T, 1103 const FunctionType::ExtInfo &Info) { 1104 QualType ResultType; 1105 if (const PointerType *Pointer = T->getAs<PointerType>()) { 1106 QualType Pointee = Pointer->getPointeeType(); 1107 ResultType = getExtFunctionType(Context, Pointee, Info); 1108 if (ResultType == Pointee) 1109 return T; 1110 1111 ResultType = Context.getPointerType(ResultType); 1112 } else if (const BlockPointerType *BlockPointer 1113 = T->getAs<BlockPointerType>()) { 1114 QualType Pointee = BlockPointer->getPointeeType(); 1115 ResultType = getExtFunctionType(Context, Pointee, Info); 1116 if (ResultType == Pointee) 1117 return T; 1118 1119 ResultType = Context.getBlockPointerType(ResultType); 1120 } else if (const FunctionType *F = T->getAs<FunctionType>()) { 1121 if (F->getExtInfo() == Info) 1122 return T; 1123 1124 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(F)) { 1125 ResultType = Context.getFunctionNoProtoType(FNPT->getResultType(), 1126 Info); 1127 } else { 1128 const FunctionProtoType *FPT = cast<FunctionProtoType>(F); 1129 ResultType 1130 = Context.getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1131 FPT->getNumArgs(), FPT->isVariadic(), 1132 FPT->getTypeQuals(), 1133 FPT->hasExceptionSpec(), 1134 FPT->hasAnyExceptionSpec(), 1135 FPT->getNumExceptions(), 1136 FPT->exception_begin(), 1137 Info); 1138 } 1139 } else 1140 return T; 1141 1142 return Context.getQualifiedType(ResultType, T.getLocalQualifiers()); 1143} 1144 1145QualType ASTContext::getNoReturnType(QualType T, bool AddNoReturn) { 1146 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1147 return getExtFunctionType(*this, T, 1148 Info.withNoReturn(AddNoReturn)); 1149} 1150 1151QualType ASTContext::getCallConvType(QualType T, CallingConv CallConv) { 1152 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1153 return getExtFunctionType(*this, T, 1154 Info.withCallingConv(CallConv)); 1155} 1156 1157QualType ASTContext::getRegParmType(QualType T, unsigned RegParm) { 1158 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1159 return getExtFunctionType(*this, T, 1160 Info.withRegParm(RegParm)); 1161} 1162 1163/// getComplexType - Return the uniqued reference to the type for a complex 1164/// number with the specified element type. 1165QualType ASTContext::getComplexType(QualType T) { 1166 // Unique pointers, to guarantee there is only one pointer of a particular 1167 // structure. 1168 llvm::FoldingSetNodeID ID; 1169 ComplexType::Profile(ID, T); 1170 1171 void *InsertPos = 0; 1172 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1173 return QualType(CT, 0); 1174 1175 // If the pointee type isn't canonical, this won't be a canonical type either, 1176 // so fill in the canonical type field. 1177 QualType Canonical; 1178 if (!T.isCanonical()) { 1179 Canonical = getComplexType(getCanonicalType(T)); 1180 1181 // Get the new insert position for the node we care about. 1182 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1183 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1184 } 1185 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1186 Types.push_back(New); 1187 ComplexTypes.InsertNode(New, InsertPos); 1188 return QualType(New, 0); 1189} 1190 1191/// getPointerType - Return the uniqued reference to the type for a pointer to 1192/// the specified type. 1193QualType ASTContext::getPointerType(QualType T) { 1194 // Unique pointers, to guarantee there is only one pointer of a particular 1195 // structure. 1196 llvm::FoldingSetNodeID ID; 1197 PointerType::Profile(ID, T); 1198 1199 void *InsertPos = 0; 1200 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1201 return QualType(PT, 0); 1202 1203 // If the pointee type isn't canonical, this won't be a canonical type either, 1204 // so fill in the canonical type field. 1205 QualType Canonical; 1206 if (!T.isCanonical()) { 1207 Canonical = getPointerType(getCanonicalType(T)); 1208 1209 // Get the new insert position for the node we care about. 1210 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1211 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1212 } 1213 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1214 Types.push_back(New); 1215 PointerTypes.InsertNode(New, InsertPos); 1216 return QualType(New, 0); 1217} 1218 1219/// getBlockPointerType - Return the uniqued reference to the type for 1220/// a pointer to the specified block. 1221QualType ASTContext::getBlockPointerType(QualType T) { 1222 assert(T->isFunctionType() && "block of function types only"); 1223 // Unique pointers, to guarantee there is only one block of a particular 1224 // structure. 1225 llvm::FoldingSetNodeID ID; 1226 BlockPointerType::Profile(ID, T); 1227 1228 void *InsertPos = 0; 1229 if (BlockPointerType *PT = 1230 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1231 return QualType(PT, 0); 1232 1233 // If the block pointee type isn't canonical, this won't be a canonical 1234 // type either so fill in the canonical type field. 1235 QualType Canonical; 1236 if (!T.isCanonical()) { 1237 Canonical = getBlockPointerType(getCanonicalType(T)); 1238 1239 // Get the new insert position for the node we care about. 1240 BlockPointerType *NewIP = 1241 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1242 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1243 } 1244 BlockPointerType *New 1245 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1246 Types.push_back(New); 1247 BlockPointerTypes.InsertNode(New, InsertPos); 1248 return QualType(New, 0); 1249} 1250 1251/// getLValueReferenceType - Return the uniqued reference to the type for an 1252/// lvalue reference to the specified type. 1253QualType ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) { 1254 // Unique pointers, to guarantee there is only one pointer of a particular 1255 // structure. 1256 llvm::FoldingSetNodeID ID; 1257 ReferenceType::Profile(ID, T, SpelledAsLValue); 1258 1259 void *InsertPos = 0; 1260 if (LValueReferenceType *RT = 1261 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1262 return QualType(RT, 0); 1263 1264 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1265 1266 // If the referencee type isn't canonical, this won't be a canonical type 1267 // either, so fill in the canonical type field. 1268 QualType Canonical; 1269 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1270 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1271 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1272 1273 // Get the new insert position for the node we care about. 1274 LValueReferenceType *NewIP = 1275 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1276 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1277 } 1278 1279 LValueReferenceType *New 1280 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1281 SpelledAsLValue); 1282 Types.push_back(New); 1283 LValueReferenceTypes.InsertNode(New, InsertPos); 1284 1285 return QualType(New, 0); 1286} 1287 1288/// getRValueReferenceType - Return the uniqued reference to the type for an 1289/// rvalue reference to the specified type. 1290QualType ASTContext::getRValueReferenceType(QualType T) { 1291 // Unique pointers, to guarantee there is only one pointer of a particular 1292 // structure. 1293 llvm::FoldingSetNodeID ID; 1294 ReferenceType::Profile(ID, T, false); 1295 1296 void *InsertPos = 0; 1297 if (RValueReferenceType *RT = 1298 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1299 return QualType(RT, 0); 1300 1301 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1302 1303 // If the referencee type isn't canonical, this won't be a canonical type 1304 // either, so fill in the canonical type field. 1305 QualType Canonical; 1306 if (InnerRef || !T.isCanonical()) { 1307 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1308 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1309 1310 // Get the new insert position for the node we care about. 1311 RValueReferenceType *NewIP = 1312 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1313 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1314 } 1315 1316 RValueReferenceType *New 1317 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1318 Types.push_back(New); 1319 RValueReferenceTypes.InsertNode(New, InsertPos); 1320 return QualType(New, 0); 1321} 1322 1323/// getMemberPointerType - Return the uniqued reference to the type for a 1324/// member pointer to the specified type, in the specified class. 1325QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) { 1326 // Unique pointers, to guarantee there is only one pointer of a particular 1327 // structure. 1328 llvm::FoldingSetNodeID ID; 1329 MemberPointerType::Profile(ID, T, Cls); 1330 1331 void *InsertPos = 0; 1332 if (MemberPointerType *PT = 1333 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1334 return QualType(PT, 0); 1335 1336 // If the pointee or class type isn't canonical, this won't be a canonical 1337 // type either, so fill in the canonical type field. 1338 QualType Canonical; 1339 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1340 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1341 1342 // Get the new insert position for the node we care about. 1343 MemberPointerType *NewIP = 1344 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1345 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1346 } 1347 MemberPointerType *New 1348 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1349 Types.push_back(New); 1350 MemberPointerTypes.InsertNode(New, InsertPos); 1351 return QualType(New, 0); 1352} 1353 1354/// getConstantArrayType - Return the unique reference to the type for an 1355/// array of the specified element type. 1356QualType ASTContext::getConstantArrayType(QualType EltTy, 1357 const llvm::APInt &ArySizeIn, 1358 ArrayType::ArraySizeModifier ASM, 1359 unsigned EltTypeQuals) { 1360 assert((EltTy->isDependentType() || 1361 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1362 "Constant array of VLAs is illegal!"); 1363 1364 // Convert the array size into a canonical width matching the pointer size for 1365 // the target. 1366 llvm::APInt ArySize(ArySizeIn); 1367 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1368 1369 llvm::FoldingSetNodeID ID; 1370 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1371 1372 void *InsertPos = 0; 1373 if (ConstantArrayType *ATP = 1374 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1375 return QualType(ATP, 0); 1376 1377 // If the element type isn't canonical, this won't be a canonical type either, 1378 // so fill in the canonical type field. 1379 QualType Canonical; 1380 if (!EltTy.isCanonical()) { 1381 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1382 ASM, EltTypeQuals); 1383 // Get the new insert position for the node we care about. 1384 ConstantArrayType *NewIP = 1385 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1386 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1387 } 1388 1389 ConstantArrayType *New = new(*this,TypeAlignment) 1390 ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1391 ConstantArrayTypes.InsertNode(New, InsertPos); 1392 Types.push_back(New); 1393 return QualType(New, 0); 1394} 1395 1396/// getVariableArrayType - Returns a non-unique reference to the type for a 1397/// variable array of the specified element type. 1398QualType ASTContext::getVariableArrayType(QualType EltTy, 1399 Expr *NumElts, 1400 ArrayType::ArraySizeModifier ASM, 1401 unsigned EltTypeQuals, 1402 SourceRange Brackets) { 1403 // Since we don't unique expressions, it isn't possible to unique VLA's 1404 // that have an expression provided for their size. 1405 QualType CanonType; 1406 1407 if (!EltTy.isCanonical()) { 1408 if (NumElts) 1409 NumElts->Retain(); 1410 CanonType = getVariableArrayType(getCanonicalType(EltTy), NumElts, ASM, 1411 EltTypeQuals, Brackets); 1412 } 1413 1414 VariableArrayType *New = new(*this, TypeAlignment) 1415 VariableArrayType(EltTy, CanonType, NumElts, ASM, EltTypeQuals, Brackets); 1416 1417 VariableArrayTypes.push_back(New); 1418 Types.push_back(New); 1419 return QualType(New, 0); 1420} 1421 1422/// getDependentSizedArrayType - Returns a non-unique reference to 1423/// the type for a dependently-sized array of the specified element 1424/// type. 1425QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1426 Expr *NumElts, 1427 ArrayType::ArraySizeModifier ASM, 1428 unsigned EltTypeQuals, 1429 SourceRange Brackets) { 1430 assert((!NumElts || NumElts->isTypeDependent() || 1431 NumElts->isValueDependent()) && 1432 "Size must be type- or value-dependent!"); 1433 1434 void *InsertPos = 0; 1435 DependentSizedArrayType *Canon = 0; 1436 llvm::FoldingSetNodeID ID; 1437 1438 if (NumElts) { 1439 // Dependently-sized array types that do not have a specified 1440 // number of elements will have their sizes deduced from an 1441 // initializer. 1442 DependentSizedArrayType::Profile(ID, *this, getCanonicalType(EltTy), ASM, 1443 EltTypeQuals, NumElts); 1444 1445 Canon = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1446 } 1447 1448 DependentSizedArrayType *New; 1449 if (Canon) { 1450 // We already have a canonical version of this array type; use it as 1451 // the canonical type for a newly-built type. 1452 New = new (*this, TypeAlignment) 1453 DependentSizedArrayType(*this, EltTy, QualType(Canon, 0), 1454 NumElts, ASM, EltTypeQuals, Brackets); 1455 } else { 1456 QualType CanonEltTy = getCanonicalType(EltTy); 1457 if (CanonEltTy == EltTy) { 1458 New = new (*this, TypeAlignment) 1459 DependentSizedArrayType(*this, EltTy, QualType(), 1460 NumElts, ASM, EltTypeQuals, Brackets); 1461 1462 if (NumElts) { 1463 DependentSizedArrayType *CanonCheck 1464 = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1465 assert(!CanonCheck && "Dependent-sized canonical array type broken"); 1466 (void)CanonCheck; 1467 DependentSizedArrayTypes.InsertNode(New, InsertPos); 1468 } 1469 } else { 1470 QualType Canon = getDependentSizedArrayType(CanonEltTy, NumElts, 1471 ASM, EltTypeQuals, 1472 SourceRange()); 1473 New = new (*this, TypeAlignment) 1474 DependentSizedArrayType(*this, EltTy, Canon, 1475 NumElts, ASM, EltTypeQuals, Brackets); 1476 } 1477 } 1478 1479 Types.push_back(New); 1480 return QualType(New, 0); 1481} 1482 1483QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1484 ArrayType::ArraySizeModifier ASM, 1485 unsigned EltTypeQuals) { 1486 llvm::FoldingSetNodeID ID; 1487 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1488 1489 void *InsertPos = 0; 1490 if (IncompleteArrayType *ATP = 1491 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1492 return QualType(ATP, 0); 1493 1494 // If the element type isn't canonical, this won't be a canonical type 1495 // either, so fill in the canonical type field. 1496 QualType Canonical; 1497 1498 if (!EltTy.isCanonical()) { 1499 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1500 ASM, EltTypeQuals); 1501 1502 // Get the new insert position for the node we care about. 1503 IncompleteArrayType *NewIP = 1504 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1505 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1506 } 1507 1508 IncompleteArrayType *New = new (*this, TypeAlignment) 1509 IncompleteArrayType(EltTy, Canonical, ASM, EltTypeQuals); 1510 1511 IncompleteArrayTypes.InsertNode(New, InsertPos); 1512 Types.push_back(New); 1513 return QualType(New, 0); 1514} 1515 1516/// getVectorType - Return the unique reference to a vector type of 1517/// the specified element type and size. VectorType must be a built-in type. 1518QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1519 VectorType::AltiVecSpecific AltiVecSpec) { 1520 BuiltinType *baseType; 1521 1522 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1523 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1524 1525 // Check if we've already instantiated a vector of this type. 1526 llvm::FoldingSetNodeID ID; 1527 VectorType::Profile(ID, vecType, NumElts, Type::Vector, AltiVecSpec); 1528 1529 void *InsertPos = 0; 1530 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1531 return QualType(VTP, 0); 1532 1533 // If the element type isn't canonical, this won't be a canonical type either, 1534 // so fill in the canonical type field. 1535 QualType Canonical; 1536 if (!vecType.isCanonical()) { 1537 Canonical = getVectorType(getCanonicalType(vecType), NumElts, 1538 VectorType::NotAltiVec); 1539 1540 // Get the new insert position for the node we care about. 1541 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1542 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1543 } 1544 VectorType *New = new (*this, TypeAlignment) 1545 VectorType(vecType, NumElts, Canonical, AltiVecSpec); 1546 VectorTypes.InsertNode(New, InsertPos); 1547 Types.push_back(New); 1548 return QualType(New, 0); 1549} 1550 1551/// getExtVectorType - Return the unique reference to an extended vector type of 1552/// the specified element type and size. VectorType must be a built-in type. 1553QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1554 BuiltinType *baseType; 1555 1556 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1557 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1558 1559 // Check if we've already instantiated a vector of this type. 1560 llvm::FoldingSetNodeID ID; 1561 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, 1562 VectorType::NotAltiVec); 1563 void *InsertPos = 0; 1564 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1565 return QualType(VTP, 0); 1566 1567 // If the element type isn't canonical, this won't be a canonical type either, 1568 // so fill in the canonical type field. 1569 QualType Canonical; 1570 if (!vecType.isCanonical()) { 1571 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1572 1573 // Get the new insert position for the node we care about. 1574 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1575 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1576 } 1577 ExtVectorType *New = new (*this, TypeAlignment) 1578 ExtVectorType(vecType, NumElts, Canonical); 1579 VectorTypes.InsertNode(New, InsertPos); 1580 Types.push_back(New); 1581 return QualType(New, 0); 1582} 1583 1584QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1585 Expr *SizeExpr, 1586 SourceLocation AttrLoc) { 1587 llvm::FoldingSetNodeID ID; 1588 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1589 SizeExpr); 1590 1591 void *InsertPos = 0; 1592 DependentSizedExtVectorType *Canon 1593 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1594 DependentSizedExtVectorType *New; 1595 if (Canon) { 1596 // We already have a canonical version of this array type; use it as 1597 // the canonical type for a newly-built type. 1598 New = new (*this, TypeAlignment) 1599 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1600 SizeExpr, AttrLoc); 1601 } else { 1602 QualType CanonVecTy = getCanonicalType(vecType); 1603 if (CanonVecTy == vecType) { 1604 New = new (*this, TypeAlignment) 1605 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1606 AttrLoc); 1607 1608 DependentSizedExtVectorType *CanonCheck 1609 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1610 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1611 (void)CanonCheck; 1612 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1613 } else { 1614 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1615 SourceLocation()); 1616 New = new (*this, TypeAlignment) 1617 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1618 } 1619 } 1620 1621 Types.push_back(New); 1622 return QualType(New, 0); 1623} 1624 1625/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1626/// 1627QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, 1628 const FunctionType::ExtInfo &Info) { 1629 const CallingConv CallConv = Info.getCC(); 1630 // Unique functions, to guarantee there is only one function of a particular 1631 // structure. 1632 llvm::FoldingSetNodeID ID; 1633 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1634 1635 void *InsertPos = 0; 1636 if (FunctionNoProtoType *FT = 1637 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1638 return QualType(FT, 0); 1639 1640 QualType Canonical; 1641 if (!ResultTy.isCanonical() || 1642 getCanonicalCallConv(CallConv) != CallConv) { 1643 Canonical = 1644 getFunctionNoProtoType(getCanonicalType(ResultTy), 1645 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1646 1647 // Get the new insert position for the node we care about. 1648 FunctionNoProtoType *NewIP = 1649 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1650 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1651 } 1652 1653 FunctionNoProtoType *New = new (*this, TypeAlignment) 1654 FunctionNoProtoType(ResultTy, Canonical, Info); 1655 Types.push_back(New); 1656 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1657 return QualType(New, 0); 1658} 1659 1660/// getFunctionType - Return a normal function type with a typed argument 1661/// list. isVariadic indicates whether the argument list includes '...'. 1662QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1663 unsigned NumArgs, bool isVariadic, 1664 unsigned TypeQuals, bool hasExceptionSpec, 1665 bool hasAnyExceptionSpec, unsigned NumExs, 1666 const QualType *ExArray, 1667 const FunctionType::ExtInfo &Info) { 1668 const CallingConv CallConv= Info.getCC(); 1669 // Unique functions, to guarantee there is only one function of a particular 1670 // structure. 1671 llvm::FoldingSetNodeID ID; 1672 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1673 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1674 NumExs, ExArray, Info); 1675 1676 void *InsertPos = 0; 1677 if (FunctionProtoType *FTP = 1678 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1679 return QualType(FTP, 0); 1680 1681 // Determine whether the type being created is already canonical or not. 1682 bool isCanonical = !hasExceptionSpec && ResultTy.isCanonical(); 1683 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1684 if (!ArgArray[i].isCanonicalAsParam()) 1685 isCanonical = false; 1686 1687 // If this type isn't canonical, get the canonical version of it. 1688 // The exception spec is not part of the canonical type. 1689 QualType Canonical; 1690 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1691 llvm::SmallVector<QualType, 16> CanonicalArgs; 1692 CanonicalArgs.reserve(NumArgs); 1693 for (unsigned i = 0; i != NumArgs; ++i) 1694 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1695 1696 Canonical = getFunctionType(getCanonicalType(ResultTy), 1697 CanonicalArgs.data(), NumArgs, 1698 isVariadic, TypeQuals, false, 1699 false, 0, 0, 1700 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1701 1702 // Get the new insert position for the node we care about. 1703 FunctionProtoType *NewIP = 1704 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1705 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1706 } 1707 1708 // FunctionProtoType objects are allocated with extra bytes after them 1709 // for two variable size arrays (for parameter and exception types) at the 1710 // end of them. 1711 FunctionProtoType *FTP = 1712 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1713 NumArgs*sizeof(QualType) + 1714 NumExs*sizeof(QualType), TypeAlignment); 1715 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1716 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1717 ExArray, NumExs, Canonical, Info); 1718 Types.push_back(FTP); 1719 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1720 return QualType(FTP, 0); 1721} 1722 1723#ifndef NDEBUG 1724static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1725 if (!isa<CXXRecordDecl>(D)) return false; 1726 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1727 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1728 return true; 1729 if (RD->getDescribedClassTemplate() && 1730 !isa<ClassTemplateSpecializationDecl>(RD)) 1731 return true; 1732 return false; 1733} 1734#endif 1735 1736/// getInjectedClassNameType - Return the unique reference to the 1737/// injected class name type for the specified templated declaration. 1738QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1739 QualType TST) { 1740 assert(NeedsInjectedClassNameType(Decl)); 1741 if (Decl->TypeForDecl) { 1742 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1743 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDeclaration()) { 1744 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1745 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1746 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1747 } else { 1748 Decl->TypeForDecl = 1749 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 1750 Types.push_back(Decl->TypeForDecl); 1751 } 1752 return QualType(Decl->TypeForDecl, 0); 1753} 1754 1755/// getTypeDeclType - Return the unique reference to the type for the 1756/// specified type declaration. 1757QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) { 1758 assert(Decl && "Passed null for Decl param"); 1759 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 1760 1761 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1762 return getTypedefType(Typedef); 1763 1764 assert(!isa<TemplateTypeParmDecl>(Decl) && 1765 "Template type parameter types are always available."); 1766 1767 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1768 assert(!Record->getPreviousDeclaration() && 1769 "struct/union has previous declaration"); 1770 assert(!NeedsInjectedClassNameType(Record)); 1771 return getRecordType(Record); 1772 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1773 assert(!Enum->getPreviousDeclaration() && 1774 "enum has previous declaration"); 1775 return getEnumType(Enum); 1776 } else if (const UnresolvedUsingTypenameDecl *Using = 1777 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1778 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1779 } else 1780 llvm_unreachable("TypeDecl without a type?"); 1781 1782 Types.push_back(Decl->TypeForDecl); 1783 return QualType(Decl->TypeForDecl, 0); 1784} 1785 1786/// getTypedefType - Return the unique reference to the type for the 1787/// specified typename decl. 1788QualType 1789ASTContext::getTypedefType(const TypedefDecl *Decl, QualType Canonical) { 1790 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1791 1792 if (Canonical.isNull()) 1793 Canonical = getCanonicalType(Decl->getUnderlyingType()); 1794 Decl->TypeForDecl = new(*this, TypeAlignment) 1795 TypedefType(Type::Typedef, Decl, Canonical); 1796 Types.push_back(Decl->TypeForDecl); 1797 return QualType(Decl->TypeForDecl, 0); 1798} 1799 1800QualType ASTContext::getRecordType(const RecordDecl *Decl) { 1801 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1802 1803 if (const RecordDecl *PrevDecl = Decl->getPreviousDeclaration()) 1804 if (PrevDecl->TypeForDecl) 1805 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 1806 1807 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Decl); 1808 Types.push_back(Decl->TypeForDecl); 1809 return QualType(Decl->TypeForDecl, 0); 1810} 1811 1812QualType ASTContext::getEnumType(const EnumDecl *Decl) { 1813 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1814 1815 if (const EnumDecl *PrevDecl = Decl->getPreviousDeclaration()) 1816 if (PrevDecl->TypeForDecl) 1817 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 1818 1819 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Decl); 1820 Types.push_back(Decl->TypeForDecl); 1821 return QualType(Decl->TypeForDecl, 0); 1822} 1823 1824/// \brief Retrieve a substitution-result type. 1825QualType 1826ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1827 QualType Replacement) { 1828 assert(Replacement.isCanonical() 1829 && "replacement types must always be canonical"); 1830 1831 llvm::FoldingSetNodeID ID; 1832 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1833 void *InsertPos = 0; 1834 SubstTemplateTypeParmType *SubstParm 1835 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1836 1837 if (!SubstParm) { 1838 SubstParm = new (*this, TypeAlignment) 1839 SubstTemplateTypeParmType(Parm, Replacement); 1840 Types.push_back(SubstParm); 1841 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1842 } 1843 1844 return QualType(SubstParm, 0); 1845} 1846 1847/// \brief Retrieve the template type parameter type for a template 1848/// parameter or parameter pack with the given depth, index, and (optionally) 1849/// name. 1850QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1851 bool ParameterPack, 1852 IdentifierInfo *Name) { 1853 llvm::FoldingSetNodeID ID; 1854 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1855 void *InsertPos = 0; 1856 TemplateTypeParmType *TypeParm 1857 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1858 1859 if (TypeParm) 1860 return QualType(TypeParm, 0); 1861 1862 if (Name) { 1863 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1864 TypeParm = new (*this, TypeAlignment) 1865 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 1866 1867 TemplateTypeParmType *TypeCheck 1868 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1869 assert(!TypeCheck && "Template type parameter canonical type broken"); 1870 (void)TypeCheck; 1871 } else 1872 TypeParm = new (*this, TypeAlignment) 1873 TemplateTypeParmType(Depth, Index, ParameterPack); 1874 1875 Types.push_back(TypeParm); 1876 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1877 1878 return QualType(TypeParm, 0); 1879} 1880 1881TypeSourceInfo * 1882ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 1883 SourceLocation NameLoc, 1884 const TemplateArgumentListInfo &Args, 1885 QualType CanonType) { 1886 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 1887 1888 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 1889 TemplateSpecializationTypeLoc TL 1890 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 1891 TL.setTemplateNameLoc(NameLoc); 1892 TL.setLAngleLoc(Args.getLAngleLoc()); 1893 TL.setRAngleLoc(Args.getRAngleLoc()); 1894 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 1895 TL.setArgLocInfo(i, Args[i].getLocInfo()); 1896 return DI; 1897} 1898 1899QualType 1900ASTContext::getTemplateSpecializationType(TemplateName Template, 1901 const TemplateArgumentListInfo &Args, 1902 QualType Canon) { 1903 unsigned NumArgs = Args.size(); 1904 1905 llvm::SmallVector<TemplateArgument, 4> ArgVec; 1906 ArgVec.reserve(NumArgs); 1907 for (unsigned i = 0; i != NumArgs; ++i) 1908 ArgVec.push_back(Args[i].getArgument()); 1909 1910 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 1911 Canon); 1912} 1913 1914QualType 1915ASTContext::getTemplateSpecializationType(TemplateName Template, 1916 const TemplateArgument *Args, 1917 unsigned NumArgs, 1918 QualType Canon) { 1919 if (!Canon.isNull()) 1920 Canon = getCanonicalType(Canon); 1921 else 1922 Canon = getCanonicalTemplateSpecializationType(Template, Args, NumArgs); 1923 1924 // Allocate the (non-canonical) template specialization type, but don't 1925 // try to unique it: these types typically have location information that 1926 // we don't unique and don't want to lose. 1927 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1928 sizeof(TemplateArgument) * NumArgs), 1929 TypeAlignment); 1930 TemplateSpecializationType *Spec 1931 = new (Mem) TemplateSpecializationType(Template, 1932 Args, NumArgs, 1933 Canon); 1934 1935 Types.push_back(Spec); 1936 return QualType(Spec, 0); 1937} 1938 1939QualType 1940ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template, 1941 const TemplateArgument *Args, 1942 unsigned NumArgs) { 1943 // Build the canonical template specialization type. 1944 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 1945 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 1946 CanonArgs.reserve(NumArgs); 1947 for (unsigned I = 0; I != NumArgs; ++I) 1948 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 1949 1950 // Determine whether this canonical template specialization type already 1951 // exists. 1952 llvm::FoldingSetNodeID ID; 1953 TemplateSpecializationType::Profile(ID, CanonTemplate, 1954 CanonArgs.data(), NumArgs, *this); 1955 1956 void *InsertPos = 0; 1957 TemplateSpecializationType *Spec 1958 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1959 1960 if (!Spec) { 1961 // Allocate a new canonical template specialization type. 1962 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1963 sizeof(TemplateArgument) * NumArgs), 1964 TypeAlignment); 1965 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 1966 CanonArgs.data(), NumArgs, 1967 QualType()); 1968 Types.push_back(Spec); 1969 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1970 } 1971 1972 assert(Spec->isDependentType() && 1973 "Non-dependent template-id type must have a canonical type"); 1974 return QualType(Spec, 0); 1975} 1976 1977QualType 1978ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 1979 NestedNameSpecifier *NNS, 1980 QualType NamedType) { 1981 llvm::FoldingSetNodeID ID; 1982 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 1983 1984 void *InsertPos = 0; 1985 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1986 if (T) 1987 return QualType(T, 0); 1988 1989 QualType Canon = NamedType; 1990 if (!Canon.isCanonical()) { 1991 Canon = getCanonicalType(NamedType); 1992 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1993 assert(!CheckT && "Elaborated canonical type broken"); 1994 (void)CheckT; 1995 } 1996 1997 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 1998 Types.push_back(T); 1999 ElaboratedTypes.InsertNode(T, InsertPos); 2000 return QualType(T, 0); 2001} 2002 2003QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 2004 NestedNameSpecifier *NNS, 2005 const IdentifierInfo *Name, 2006 QualType Canon) { 2007 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2008 2009 if (Canon.isNull()) { 2010 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2011 ElaboratedTypeKeyword CanonKeyword = Keyword; 2012 if (Keyword == ETK_None) 2013 CanonKeyword = ETK_Typename; 2014 2015 if (CanonNNS != NNS || CanonKeyword != Keyword) 2016 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 2017 } 2018 2019 llvm::FoldingSetNodeID ID; 2020 DependentNameType::Profile(ID, Keyword, NNS, Name); 2021 2022 void *InsertPos = 0; 2023 DependentNameType *T 2024 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2025 if (T) 2026 return QualType(T, 0); 2027 2028 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 2029 Types.push_back(T); 2030 DependentNameTypes.InsertNode(T, InsertPos); 2031 return QualType(T, 0); 2032} 2033 2034QualType 2035ASTContext::getDependentTemplateSpecializationType( 2036 ElaboratedTypeKeyword Keyword, 2037 NestedNameSpecifier *NNS, 2038 const IdentifierInfo *Name, 2039 const TemplateArgumentListInfo &Args) { 2040 // TODO: avoid this copy 2041 llvm::SmallVector<TemplateArgument, 16> ArgCopy; 2042 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2043 ArgCopy.push_back(Args[I].getArgument()); 2044 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2045 ArgCopy.size(), 2046 ArgCopy.data()); 2047} 2048 2049QualType 2050ASTContext::getDependentTemplateSpecializationType( 2051 ElaboratedTypeKeyword Keyword, 2052 NestedNameSpecifier *NNS, 2053 const IdentifierInfo *Name, 2054 unsigned NumArgs, 2055 const TemplateArgument *Args) { 2056 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2057 2058 llvm::FoldingSetNodeID ID; 2059 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2060 Name, NumArgs, Args); 2061 2062 void *InsertPos = 0; 2063 DependentTemplateSpecializationType *T 2064 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2065 if (T) 2066 return QualType(T, 0); 2067 2068 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2069 2070 ElaboratedTypeKeyword CanonKeyword = Keyword; 2071 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2072 2073 bool AnyNonCanonArgs = false; 2074 llvm::SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2075 for (unsigned I = 0; I != NumArgs; ++I) { 2076 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2077 if (!CanonArgs[I].structurallyEquals(Args[I])) 2078 AnyNonCanonArgs = true; 2079 } 2080 2081 QualType Canon; 2082 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2083 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2084 Name, NumArgs, 2085 CanonArgs.data()); 2086 2087 // Find the insert position again. 2088 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2089 } 2090 2091 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2092 sizeof(TemplateArgument) * NumArgs), 2093 TypeAlignment); 2094 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2095 Name, NumArgs, Args, Canon); 2096 Types.push_back(T); 2097 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2098 return QualType(T, 0); 2099} 2100 2101/// CmpProtocolNames - Comparison predicate for sorting protocols 2102/// alphabetically. 2103static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2104 const ObjCProtocolDecl *RHS) { 2105 return LHS->getDeclName() < RHS->getDeclName(); 2106} 2107 2108static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2109 unsigned NumProtocols) { 2110 if (NumProtocols == 0) return true; 2111 2112 for (unsigned i = 1; i != NumProtocols; ++i) 2113 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2114 return false; 2115 return true; 2116} 2117 2118static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2119 unsigned &NumProtocols) { 2120 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2121 2122 // Sort protocols, keyed by name. 2123 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2124 2125 // Remove duplicates. 2126 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2127 NumProtocols = ProtocolsEnd-Protocols; 2128} 2129 2130QualType ASTContext::getObjCObjectType(QualType BaseType, 2131 ObjCProtocolDecl * const *Protocols, 2132 unsigned NumProtocols) { 2133 // If the base type is an interface and there aren't any protocols 2134 // to add, then the interface type will do just fine. 2135 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2136 return BaseType; 2137 2138 // Look in the folding set for an existing type. 2139 llvm::FoldingSetNodeID ID; 2140 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2141 void *InsertPos = 0; 2142 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2143 return QualType(QT, 0); 2144 2145 // Build the canonical type, which has the canonical base type and 2146 // a sorted-and-uniqued list of protocols. 2147 QualType Canonical; 2148 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2149 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2150 if (!ProtocolsSorted) { 2151 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2152 Protocols + NumProtocols); 2153 unsigned UniqueCount = NumProtocols; 2154 2155 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2156 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2157 &Sorted[0], UniqueCount); 2158 } else { 2159 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2160 Protocols, NumProtocols); 2161 } 2162 2163 // Regenerate InsertPos. 2164 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2165 } 2166 2167 unsigned Size = sizeof(ObjCObjectTypeImpl); 2168 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2169 void *Mem = Allocate(Size, TypeAlignment); 2170 ObjCObjectTypeImpl *T = 2171 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2172 2173 Types.push_back(T); 2174 ObjCObjectTypes.InsertNode(T, InsertPos); 2175 return QualType(T, 0); 2176} 2177 2178/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2179/// the given object type. 2180QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) { 2181 llvm::FoldingSetNodeID ID; 2182 ObjCObjectPointerType::Profile(ID, ObjectT); 2183 2184 void *InsertPos = 0; 2185 if (ObjCObjectPointerType *QT = 2186 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2187 return QualType(QT, 0); 2188 2189 // Find the canonical object type. 2190 QualType Canonical; 2191 if (!ObjectT.isCanonical()) { 2192 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2193 2194 // Regenerate InsertPos. 2195 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2196 } 2197 2198 // No match. 2199 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2200 ObjCObjectPointerType *QType = 2201 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2202 2203 Types.push_back(QType); 2204 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2205 return QualType(QType, 0); 2206} 2207 2208/// getObjCInterfaceType - Return the unique reference to the type for the 2209/// specified ObjC interface decl. The list of protocols is optional. 2210QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) { 2211 if (Decl->TypeForDecl) 2212 return QualType(Decl->TypeForDecl, 0); 2213 2214 // FIXME: redeclarations? 2215 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2216 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2217 Decl->TypeForDecl = T; 2218 Types.push_back(T); 2219 return QualType(T, 0); 2220} 2221 2222/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2223/// TypeOfExprType AST's (since expression's are never shared). For example, 2224/// multiple declarations that refer to "typeof(x)" all contain different 2225/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2226/// on canonical type's (which are always unique). 2227QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2228 TypeOfExprType *toe; 2229 if (tofExpr->isTypeDependent()) { 2230 llvm::FoldingSetNodeID ID; 2231 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2232 2233 void *InsertPos = 0; 2234 DependentTypeOfExprType *Canon 2235 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2236 if (Canon) { 2237 // We already have a "canonical" version of an identical, dependent 2238 // typeof(expr) type. Use that as our canonical type. 2239 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2240 QualType((TypeOfExprType*)Canon, 0)); 2241 } 2242 else { 2243 // Build a new, canonical typeof(expr) type. 2244 Canon 2245 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2246 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2247 toe = Canon; 2248 } 2249 } else { 2250 QualType Canonical = getCanonicalType(tofExpr->getType()); 2251 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2252 } 2253 Types.push_back(toe); 2254 return QualType(toe, 0); 2255} 2256 2257/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2258/// TypeOfType AST's. The only motivation to unique these nodes would be 2259/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2260/// an issue. This doesn't effect the type checker, since it operates 2261/// on canonical type's (which are always unique). 2262QualType ASTContext::getTypeOfType(QualType tofType) { 2263 QualType Canonical = getCanonicalType(tofType); 2264 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2265 Types.push_back(tot); 2266 return QualType(tot, 0); 2267} 2268 2269/// getDecltypeForExpr - Given an expr, will return the decltype for that 2270/// expression, according to the rules in C++0x [dcl.type.simple]p4 2271static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2272 if (e->isTypeDependent()) 2273 return Context.DependentTy; 2274 2275 // If e is an id expression or a class member access, decltype(e) is defined 2276 // as the type of the entity named by e. 2277 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2278 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2279 return VD->getType(); 2280 } 2281 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2282 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2283 return FD->getType(); 2284 } 2285 // If e is a function call or an invocation of an overloaded operator, 2286 // (parentheses around e are ignored), decltype(e) is defined as the 2287 // return type of that function. 2288 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2289 return CE->getCallReturnType(); 2290 2291 QualType T = e->getType(); 2292 2293 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2294 // defined as T&, otherwise decltype(e) is defined as T. 2295 if (e->isLvalue(Context) == Expr::LV_Valid) 2296 T = Context.getLValueReferenceType(T); 2297 2298 return T; 2299} 2300 2301/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2302/// DecltypeType AST's. The only motivation to unique these nodes would be 2303/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2304/// an issue. This doesn't effect the type checker, since it operates 2305/// on canonical type's (which are always unique). 2306QualType ASTContext::getDecltypeType(Expr *e) { 2307 DecltypeType *dt; 2308 if (e->isTypeDependent()) { 2309 llvm::FoldingSetNodeID ID; 2310 DependentDecltypeType::Profile(ID, *this, e); 2311 2312 void *InsertPos = 0; 2313 DependentDecltypeType *Canon 2314 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2315 if (Canon) { 2316 // We already have a "canonical" version of an equivalent, dependent 2317 // decltype type. Use that as our canonical type. 2318 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2319 QualType((DecltypeType*)Canon, 0)); 2320 } 2321 else { 2322 // Build a new, canonical typeof(expr) type. 2323 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2324 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2325 dt = Canon; 2326 } 2327 } else { 2328 QualType T = getDecltypeForExpr(e, *this); 2329 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2330 } 2331 Types.push_back(dt); 2332 return QualType(dt, 0); 2333} 2334 2335/// getTagDeclType - Return the unique reference to the type for the 2336/// specified TagDecl (struct/union/class/enum) decl. 2337QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2338 assert (Decl); 2339 // FIXME: What is the design on getTagDeclType when it requires casting 2340 // away const? mutable? 2341 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2342} 2343 2344/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2345/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2346/// needs to agree with the definition in <stddef.h>. 2347CanQualType ASTContext::getSizeType() const { 2348 return getFromTargetType(Target.getSizeType()); 2349} 2350 2351/// getSignedWCharType - Return the type of "signed wchar_t". 2352/// Used when in C++, as a GCC extension. 2353QualType ASTContext::getSignedWCharType() const { 2354 // FIXME: derive from "Target" ? 2355 return WCharTy; 2356} 2357 2358/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2359/// Used when in C++, as a GCC extension. 2360QualType ASTContext::getUnsignedWCharType() const { 2361 // FIXME: derive from "Target" ? 2362 return UnsignedIntTy; 2363} 2364 2365/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2366/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2367QualType ASTContext::getPointerDiffType() const { 2368 return getFromTargetType(Target.getPtrDiffType(0)); 2369} 2370 2371//===----------------------------------------------------------------------===// 2372// Type Operators 2373//===----------------------------------------------------------------------===// 2374 2375CanQualType ASTContext::getCanonicalParamType(QualType T) { 2376 // Push qualifiers into arrays, and then discard any remaining 2377 // qualifiers. 2378 T = getCanonicalType(T); 2379 const Type *Ty = T.getTypePtr(); 2380 2381 QualType Result; 2382 if (isa<ArrayType>(Ty)) { 2383 Result = getArrayDecayedType(QualType(Ty,0)); 2384 } else if (isa<FunctionType>(Ty)) { 2385 Result = getPointerType(QualType(Ty, 0)); 2386 } else { 2387 Result = QualType(Ty, 0); 2388 } 2389 2390 return CanQualType::CreateUnsafe(Result); 2391} 2392 2393/// getCanonicalType - Return the canonical (structural) type corresponding to 2394/// the specified potentially non-canonical type. The non-canonical version 2395/// of a type may have many "decorated" versions of types. Decorators can 2396/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2397/// to be free of any of these, allowing two canonical types to be compared 2398/// for exact equality with a simple pointer comparison. 2399CanQualType ASTContext::getCanonicalType(QualType T) { 2400 QualifierCollector Quals; 2401 const Type *Ptr = Quals.strip(T); 2402 QualType CanType = Ptr->getCanonicalTypeInternal(); 2403 2404 // The canonical internal type will be the canonical type *except* 2405 // that we push type qualifiers down through array types. 2406 2407 // If there are no new qualifiers to push down, stop here. 2408 if (!Quals.hasQualifiers()) 2409 return CanQualType::CreateUnsafe(CanType); 2410 2411 // If the type qualifiers are on an array type, get the canonical 2412 // type of the array with the qualifiers applied to the element 2413 // type. 2414 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2415 if (!AT) 2416 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2417 2418 // Get the canonical version of the element with the extra qualifiers on it. 2419 // This can recursively sink qualifiers through multiple levels of arrays. 2420 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2421 NewEltTy = getCanonicalType(NewEltTy); 2422 2423 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2424 return CanQualType::CreateUnsafe( 2425 getConstantArrayType(NewEltTy, CAT->getSize(), 2426 CAT->getSizeModifier(), 2427 CAT->getIndexTypeCVRQualifiers())); 2428 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2429 return CanQualType::CreateUnsafe( 2430 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2431 IAT->getIndexTypeCVRQualifiers())); 2432 2433 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2434 return CanQualType::CreateUnsafe( 2435 getDependentSizedArrayType(NewEltTy, 2436 DSAT->getSizeExpr() ? 2437 DSAT->getSizeExpr()->Retain() : 0, 2438 DSAT->getSizeModifier(), 2439 DSAT->getIndexTypeCVRQualifiers(), 2440 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2441 2442 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2443 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2444 VAT->getSizeExpr() ? 2445 VAT->getSizeExpr()->Retain() : 0, 2446 VAT->getSizeModifier(), 2447 VAT->getIndexTypeCVRQualifiers(), 2448 VAT->getBracketsRange())); 2449} 2450 2451QualType ASTContext::getUnqualifiedArrayType(QualType T, 2452 Qualifiers &Quals) { 2453 Quals = T.getQualifiers(); 2454 const ArrayType *AT = getAsArrayType(T); 2455 if (!AT) { 2456 return T.getUnqualifiedType(); 2457 } 2458 2459 QualType Elt = AT->getElementType(); 2460 QualType UnqualElt = getUnqualifiedArrayType(Elt, Quals); 2461 if (Elt == UnqualElt) 2462 return T; 2463 2464 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 2465 return getConstantArrayType(UnqualElt, CAT->getSize(), 2466 CAT->getSizeModifier(), 0); 2467 } 2468 2469 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 2470 return getIncompleteArrayType(UnqualElt, IAT->getSizeModifier(), 0); 2471 } 2472 2473 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 2474 return getVariableArrayType(UnqualElt, 2475 VAT->getSizeExpr() ? 2476 VAT->getSizeExpr()->Retain() : 0, 2477 VAT->getSizeModifier(), 2478 VAT->getIndexTypeCVRQualifiers(), 2479 VAT->getBracketsRange()); 2480 } 2481 2482 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 2483 return getDependentSizedArrayType(UnqualElt, DSAT->getSizeExpr()->Retain(), 2484 DSAT->getSizeModifier(), 0, 2485 SourceRange()); 2486} 2487 2488/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 2489/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 2490/// they point to and return true. If T1 and T2 aren't pointer types 2491/// or pointer-to-member types, or if they are not similar at this 2492/// level, returns false and leaves T1 and T2 unchanged. Top-level 2493/// qualifiers on T1 and T2 are ignored. This function will typically 2494/// be called in a loop that successively "unwraps" pointer and 2495/// pointer-to-member types to compare them at each level. 2496bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 2497 const PointerType *T1PtrType = T1->getAs<PointerType>(), 2498 *T2PtrType = T2->getAs<PointerType>(); 2499 if (T1PtrType && T2PtrType) { 2500 T1 = T1PtrType->getPointeeType(); 2501 T2 = T2PtrType->getPointeeType(); 2502 return true; 2503 } 2504 2505 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 2506 *T2MPType = T2->getAs<MemberPointerType>(); 2507 if (T1MPType && T2MPType && 2508 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 2509 QualType(T2MPType->getClass(), 0))) { 2510 T1 = T1MPType->getPointeeType(); 2511 T2 = T2MPType->getPointeeType(); 2512 return true; 2513 } 2514 2515 if (getLangOptions().ObjC1) { 2516 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 2517 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 2518 if (T1OPType && T2OPType) { 2519 T1 = T1OPType->getPointeeType(); 2520 T2 = T2OPType->getPointeeType(); 2521 return true; 2522 } 2523 } 2524 2525 // FIXME: Block pointers, too? 2526 2527 return false; 2528} 2529 2530DeclarationNameInfo ASTContext::getNameForTemplate(TemplateName Name, 2531 SourceLocation NameLoc) { 2532 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2533 // DNInfo work in progress: CHECKME: what about DNLoc? 2534 return DeclarationNameInfo(TD->getDeclName(), NameLoc); 2535 2536 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2537 DeclarationName DName; 2538 if (DTN->isIdentifier()) { 2539 DName = DeclarationNames.getIdentifier(DTN->getIdentifier()); 2540 return DeclarationNameInfo(DName, NameLoc); 2541 } else { 2542 DName = DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2543 // DNInfo work in progress: FIXME: source locations? 2544 DeclarationNameLoc DNLoc; 2545 DNLoc.CXXOperatorName.BeginOpNameLoc = SourceLocation().getRawEncoding(); 2546 DNLoc.CXXOperatorName.EndOpNameLoc = SourceLocation().getRawEncoding(); 2547 return DeclarationNameInfo(DName, NameLoc, DNLoc); 2548 } 2549 } 2550 2551 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2552 assert(Storage); 2553 // DNInfo work in progress: CHECKME: what about DNLoc? 2554 return DeclarationNameInfo((*Storage->begin())->getDeclName(), NameLoc); 2555} 2556 2557TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2558 if (TemplateDecl *Template = Name.getAsTemplateDecl()) { 2559 if (TemplateTemplateParmDecl *TTP 2560 = dyn_cast<TemplateTemplateParmDecl>(Template)) 2561 Template = getCanonicalTemplateTemplateParmDecl(TTP); 2562 2563 // The canonical template name is the canonical template declaration. 2564 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2565 } 2566 2567 assert(!Name.getAsOverloadedTemplate()); 2568 2569 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2570 assert(DTN && "Non-dependent template names must refer to template decls."); 2571 return DTN->CanonicalTemplateName; 2572} 2573 2574bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2575 X = getCanonicalTemplateName(X); 2576 Y = getCanonicalTemplateName(Y); 2577 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2578} 2579 2580TemplateArgument 2581ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2582 switch (Arg.getKind()) { 2583 case TemplateArgument::Null: 2584 return Arg; 2585 2586 case TemplateArgument::Expression: 2587 return Arg; 2588 2589 case TemplateArgument::Declaration: 2590 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2591 2592 case TemplateArgument::Template: 2593 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2594 2595 case TemplateArgument::Integral: 2596 return TemplateArgument(*Arg.getAsIntegral(), 2597 getCanonicalType(Arg.getIntegralType())); 2598 2599 case TemplateArgument::Type: 2600 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2601 2602 case TemplateArgument::Pack: { 2603 // FIXME: Allocate in ASTContext 2604 TemplateArgument *CanonArgs = new TemplateArgument[Arg.pack_size()]; 2605 unsigned Idx = 0; 2606 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2607 AEnd = Arg.pack_end(); 2608 A != AEnd; (void)++A, ++Idx) 2609 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2610 2611 TemplateArgument Result; 2612 Result.setArgumentPack(CanonArgs, Arg.pack_size(), false); 2613 return Result; 2614 } 2615 } 2616 2617 // Silence GCC warning 2618 assert(false && "Unhandled template argument kind"); 2619 return TemplateArgument(); 2620} 2621 2622NestedNameSpecifier * 2623ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2624 if (!NNS) 2625 return 0; 2626 2627 switch (NNS->getKind()) { 2628 case NestedNameSpecifier::Identifier: 2629 // Canonicalize the prefix but keep the identifier the same. 2630 return NestedNameSpecifier::Create(*this, 2631 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2632 NNS->getAsIdentifier()); 2633 2634 case NestedNameSpecifier::Namespace: 2635 // A namespace is canonical; build a nested-name-specifier with 2636 // this namespace and no prefix. 2637 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2638 2639 case NestedNameSpecifier::TypeSpec: 2640 case NestedNameSpecifier::TypeSpecWithTemplate: { 2641 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2642 return NestedNameSpecifier::Create(*this, 0, 2643 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2644 T.getTypePtr()); 2645 } 2646 2647 case NestedNameSpecifier::Global: 2648 // The global specifier is canonical and unique. 2649 return NNS; 2650 } 2651 2652 // Required to silence a GCC warning 2653 return 0; 2654} 2655 2656 2657const ArrayType *ASTContext::getAsArrayType(QualType T) { 2658 // Handle the non-qualified case efficiently. 2659 if (!T.hasLocalQualifiers()) { 2660 // Handle the common positive case fast. 2661 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2662 return AT; 2663 } 2664 2665 // Handle the common negative case fast. 2666 QualType CType = T->getCanonicalTypeInternal(); 2667 if (!isa<ArrayType>(CType)) 2668 return 0; 2669 2670 // Apply any qualifiers from the array type to the element type. This 2671 // implements C99 6.7.3p8: "If the specification of an array type includes 2672 // any type qualifiers, the element type is so qualified, not the array type." 2673 2674 // If we get here, we either have type qualifiers on the type, or we have 2675 // sugar such as a typedef in the way. If we have type qualifiers on the type 2676 // we must propagate them down into the element type. 2677 2678 QualifierCollector Qs; 2679 const Type *Ty = Qs.strip(T.getDesugaredType()); 2680 2681 // If we have a simple case, just return now. 2682 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2683 if (ATy == 0 || Qs.empty()) 2684 return ATy; 2685 2686 // Otherwise, we have an array and we have qualifiers on it. Push the 2687 // qualifiers into the array element type and return a new array type. 2688 // Get the canonical version of the element with the extra qualifiers on it. 2689 // This can recursively sink qualifiers through multiple levels of arrays. 2690 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2691 2692 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2693 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2694 CAT->getSizeModifier(), 2695 CAT->getIndexTypeCVRQualifiers())); 2696 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2697 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2698 IAT->getSizeModifier(), 2699 IAT->getIndexTypeCVRQualifiers())); 2700 2701 if (const DependentSizedArrayType *DSAT 2702 = dyn_cast<DependentSizedArrayType>(ATy)) 2703 return cast<ArrayType>( 2704 getDependentSizedArrayType(NewEltTy, 2705 DSAT->getSizeExpr() ? 2706 DSAT->getSizeExpr()->Retain() : 0, 2707 DSAT->getSizeModifier(), 2708 DSAT->getIndexTypeCVRQualifiers(), 2709 DSAT->getBracketsRange())); 2710 2711 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2712 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2713 VAT->getSizeExpr() ? 2714 VAT->getSizeExpr()->Retain() : 0, 2715 VAT->getSizeModifier(), 2716 VAT->getIndexTypeCVRQualifiers(), 2717 VAT->getBracketsRange())); 2718} 2719 2720 2721/// getArrayDecayedType - Return the properly qualified result of decaying the 2722/// specified array type to a pointer. This operation is non-trivial when 2723/// handling typedefs etc. The canonical type of "T" must be an array type, 2724/// this returns a pointer to a properly qualified element of the array. 2725/// 2726/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2727QualType ASTContext::getArrayDecayedType(QualType Ty) { 2728 // Get the element type with 'getAsArrayType' so that we don't lose any 2729 // typedefs in the element type of the array. This also handles propagation 2730 // of type qualifiers from the array type into the element type if present 2731 // (C99 6.7.3p8). 2732 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2733 assert(PrettyArrayType && "Not an array type!"); 2734 2735 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2736 2737 // int x[restrict 4] -> int *restrict 2738 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2739} 2740 2741QualType ASTContext::getBaseElementType(QualType QT) { 2742 QualifierCollector Qs; 2743 while (const ArrayType *AT = getAsArrayType(QualType(Qs.strip(QT), 0))) 2744 QT = AT->getElementType(); 2745 return Qs.apply(QT); 2746} 2747 2748QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2749 QualType ElemTy = AT->getElementType(); 2750 2751 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2752 return getBaseElementType(AT); 2753 2754 return ElemTy; 2755} 2756 2757/// getConstantArrayElementCount - Returns number of constant array elements. 2758uint64_t 2759ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2760 uint64_t ElementCount = 1; 2761 do { 2762 ElementCount *= CA->getSize().getZExtValue(); 2763 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2764 } while (CA); 2765 return ElementCount; 2766} 2767 2768/// getFloatingRank - Return a relative rank for floating point types. 2769/// This routine will assert if passed a built-in type that isn't a float. 2770static FloatingRank getFloatingRank(QualType T) { 2771 if (const ComplexType *CT = T->getAs<ComplexType>()) 2772 return getFloatingRank(CT->getElementType()); 2773 2774 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2775 switch (T->getAs<BuiltinType>()->getKind()) { 2776 default: assert(0 && "getFloatingRank(): not a floating type"); 2777 case BuiltinType::Float: return FloatRank; 2778 case BuiltinType::Double: return DoubleRank; 2779 case BuiltinType::LongDouble: return LongDoubleRank; 2780 } 2781} 2782 2783/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2784/// point or a complex type (based on typeDomain/typeSize). 2785/// 'typeDomain' is a real floating point or complex type. 2786/// 'typeSize' is a real floating point or complex type. 2787QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2788 QualType Domain) const { 2789 FloatingRank EltRank = getFloatingRank(Size); 2790 if (Domain->isComplexType()) { 2791 switch (EltRank) { 2792 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2793 case FloatRank: return FloatComplexTy; 2794 case DoubleRank: return DoubleComplexTy; 2795 case LongDoubleRank: return LongDoubleComplexTy; 2796 } 2797 } 2798 2799 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2800 switch (EltRank) { 2801 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2802 case FloatRank: return FloatTy; 2803 case DoubleRank: return DoubleTy; 2804 case LongDoubleRank: return LongDoubleTy; 2805 } 2806} 2807 2808/// getFloatingTypeOrder - Compare the rank of the two specified floating 2809/// point types, ignoring the domain of the type (i.e. 'double' == 2810/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2811/// LHS < RHS, return -1. 2812int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2813 FloatingRank LHSR = getFloatingRank(LHS); 2814 FloatingRank RHSR = getFloatingRank(RHS); 2815 2816 if (LHSR == RHSR) 2817 return 0; 2818 if (LHSR > RHSR) 2819 return 1; 2820 return -1; 2821} 2822 2823/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2824/// routine will assert if passed a built-in type that isn't an integer or enum, 2825/// or if it is not canonicalized. 2826unsigned ASTContext::getIntegerRank(Type *T) { 2827 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2828 if (EnumType* ET = dyn_cast<EnumType>(T)) 2829 T = ET->getDecl()->getPromotionType().getTypePtr(); 2830 2831 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2832 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2833 2834 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2835 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2836 2837 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2838 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2839 2840 switch (cast<BuiltinType>(T)->getKind()) { 2841 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2842 case BuiltinType::Bool: 2843 return 1 + (getIntWidth(BoolTy) << 3); 2844 case BuiltinType::Char_S: 2845 case BuiltinType::Char_U: 2846 case BuiltinType::SChar: 2847 case BuiltinType::UChar: 2848 return 2 + (getIntWidth(CharTy) << 3); 2849 case BuiltinType::Short: 2850 case BuiltinType::UShort: 2851 return 3 + (getIntWidth(ShortTy) << 3); 2852 case BuiltinType::Int: 2853 case BuiltinType::UInt: 2854 return 4 + (getIntWidth(IntTy) << 3); 2855 case BuiltinType::Long: 2856 case BuiltinType::ULong: 2857 return 5 + (getIntWidth(LongTy) << 3); 2858 case BuiltinType::LongLong: 2859 case BuiltinType::ULongLong: 2860 return 6 + (getIntWidth(LongLongTy) << 3); 2861 case BuiltinType::Int128: 2862 case BuiltinType::UInt128: 2863 return 7 + (getIntWidth(Int128Ty) << 3); 2864 } 2865} 2866 2867/// \brief Whether this is a promotable bitfield reference according 2868/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 2869/// 2870/// \returns the type this bit-field will promote to, or NULL if no 2871/// promotion occurs. 2872QualType ASTContext::isPromotableBitField(Expr *E) { 2873 if (E->isTypeDependent() || E->isValueDependent()) 2874 return QualType(); 2875 2876 FieldDecl *Field = E->getBitField(); 2877 if (!Field) 2878 return QualType(); 2879 2880 QualType FT = Field->getType(); 2881 2882 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 2883 uint64_t BitWidth = BitWidthAP.getZExtValue(); 2884 uint64_t IntSize = getTypeSize(IntTy); 2885 // GCC extension compatibility: if the bit-field size is less than or equal 2886 // to the size of int, it gets promoted no matter what its type is. 2887 // For instance, unsigned long bf : 4 gets promoted to signed int. 2888 if (BitWidth < IntSize) 2889 return IntTy; 2890 2891 if (BitWidth == IntSize) 2892 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 2893 2894 // Types bigger than int are not subject to promotions, and therefore act 2895 // like the base type. 2896 // FIXME: This doesn't quite match what gcc does, but what gcc does here 2897 // is ridiculous. 2898 return QualType(); 2899} 2900 2901/// getPromotedIntegerType - Returns the type that Promotable will 2902/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 2903/// integer type. 2904QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 2905 assert(!Promotable.isNull()); 2906 assert(Promotable->isPromotableIntegerType()); 2907 if (const EnumType *ET = Promotable->getAs<EnumType>()) 2908 return ET->getDecl()->getPromotionType(); 2909 if (Promotable->isSignedIntegerType()) 2910 return IntTy; 2911 uint64_t PromotableSize = getTypeSize(Promotable); 2912 uint64_t IntSize = getTypeSize(IntTy); 2913 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 2914 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 2915} 2916 2917/// getIntegerTypeOrder - Returns the highest ranked integer type: 2918/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2919/// LHS < RHS, return -1. 2920int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2921 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2922 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2923 if (LHSC == RHSC) return 0; 2924 2925 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2926 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2927 2928 unsigned LHSRank = getIntegerRank(LHSC); 2929 unsigned RHSRank = getIntegerRank(RHSC); 2930 2931 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2932 if (LHSRank == RHSRank) return 0; 2933 return LHSRank > RHSRank ? 1 : -1; 2934 } 2935 2936 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2937 if (LHSUnsigned) { 2938 // If the unsigned [LHS] type is larger, return it. 2939 if (LHSRank >= RHSRank) 2940 return 1; 2941 2942 // If the signed type can represent all values of the unsigned type, it 2943 // wins. Because we are dealing with 2's complement and types that are 2944 // powers of two larger than each other, this is always safe. 2945 return -1; 2946 } 2947 2948 // If the unsigned [RHS] type is larger, return it. 2949 if (RHSRank >= LHSRank) 2950 return -1; 2951 2952 // If the signed type can represent all values of the unsigned type, it 2953 // wins. Because we are dealing with 2's complement and types that are 2954 // powers of two larger than each other, this is always safe. 2955 return 1; 2956} 2957 2958static RecordDecl * 2959CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 2960 SourceLocation L, IdentifierInfo *Id) { 2961 if (Ctx.getLangOptions().CPlusPlus) 2962 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 2963 else 2964 return RecordDecl::Create(Ctx, TK, DC, L, Id); 2965} 2966 2967// getCFConstantStringType - Return the type used for constant CFStrings. 2968QualType ASTContext::getCFConstantStringType() { 2969 if (!CFConstantStringTypeDecl) { 2970 CFConstantStringTypeDecl = 2971 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2972 &Idents.get("NSConstantString")); 2973 CFConstantStringTypeDecl->startDefinition(); 2974 2975 QualType FieldTypes[4]; 2976 2977 // const int *isa; 2978 FieldTypes[0] = getPointerType(IntTy.withConst()); 2979 // int flags; 2980 FieldTypes[1] = IntTy; 2981 // const char *str; 2982 FieldTypes[2] = getPointerType(CharTy.withConst()); 2983 // long length; 2984 FieldTypes[3] = LongTy; 2985 2986 // Create fields 2987 for (unsigned i = 0; i < 4; ++i) { 2988 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2989 SourceLocation(), 0, 2990 FieldTypes[i], /*TInfo=*/0, 2991 /*BitWidth=*/0, 2992 /*Mutable=*/false); 2993 Field->setAccess(AS_public); 2994 CFConstantStringTypeDecl->addDecl(Field); 2995 } 2996 2997 CFConstantStringTypeDecl->completeDefinition(); 2998 } 2999 3000 return getTagDeclType(CFConstantStringTypeDecl); 3001} 3002 3003void ASTContext::setCFConstantStringType(QualType T) { 3004 const RecordType *Rec = T->getAs<RecordType>(); 3005 assert(Rec && "Invalid CFConstantStringType"); 3006 CFConstantStringTypeDecl = Rec->getDecl(); 3007} 3008 3009// getNSConstantStringType - Return the type used for constant NSStrings. 3010QualType ASTContext::getNSConstantStringType() { 3011 if (!NSConstantStringTypeDecl) { 3012 NSConstantStringTypeDecl = 3013 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3014 &Idents.get("__builtin_NSString")); 3015 NSConstantStringTypeDecl->startDefinition(); 3016 3017 QualType FieldTypes[3]; 3018 3019 // const int *isa; 3020 FieldTypes[0] = getPointerType(IntTy.withConst()); 3021 // const char *str; 3022 FieldTypes[1] = getPointerType(CharTy.withConst()); 3023 // unsigned int length; 3024 FieldTypes[2] = UnsignedIntTy; 3025 3026 // Create fields 3027 for (unsigned i = 0; i < 3; ++i) { 3028 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 3029 SourceLocation(), 0, 3030 FieldTypes[i], /*TInfo=*/0, 3031 /*BitWidth=*/0, 3032 /*Mutable=*/false); 3033 Field->setAccess(AS_public); 3034 NSConstantStringTypeDecl->addDecl(Field); 3035 } 3036 3037 NSConstantStringTypeDecl->completeDefinition(); 3038 } 3039 3040 return getTagDeclType(NSConstantStringTypeDecl); 3041} 3042 3043void ASTContext::setNSConstantStringType(QualType T) { 3044 const RecordType *Rec = T->getAs<RecordType>(); 3045 assert(Rec && "Invalid NSConstantStringType"); 3046 NSConstantStringTypeDecl = Rec->getDecl(); 3047} 3048 3049QualType ASTContext::getObjCFastEnumerationStateType() { 3050 if (!ObjCFastEnumerationStateTypeDecl) { 3051 ObjCFastEnumerationStateTypeDecl = 3052 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3053 &Idents.get("__objcFastEnumerationState")); 3054 ObjCFastEnumerationStateTypeDecl->startDefinition(); 3055 3056 QualType FieldTypes[] = { 3057 UnsignedLongTy, 3058 getPointerType(ObjCIdTypedefType), 3059 getPointerType(UnsignedLongTy), 3060 getConstantArrayType(UnsignedLongTy, 3061 llvm::APInt(32, 5), ArrayType::Normal, 0) 3062 }; 3063 3064 for (size_t i = 0; i < 4; ++i) { 3065 FieldDecl *Field = FieldDecl::Create(*this, 3066 ObjCFastEnumerationStateTypeDecl, 3067 SourceLocation(), 0, 3068 FieldTypes[i], /*TInfo=*/0, 3069 /*BitWidth=*/0, 3070 /*Mutable=*/false); 3071 Field->setAccess(AS_public); 3072 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 3073 } 3074 if (getLangOptions().CPlusPlus) 3075 if (CXXRecordDecl *CXXRD = 3076 dyn_cast<CXXRecordDecl>(ObjCFastEnumerationStateTypeDecl)) 3077 CXXRD->setEmpty(false); 3078 3079 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 3080 } 3081 3082 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 3083} 3084 3085QualType ASTContext::getBlockDescriptorType() { 3086 if (BlockDescriptorType) 3087 return getTagDeclType(BlockDescriptorType); 3088 3089 RecordDecl *T; 3090 // FIXME: Needs the FlagAppleBlock bit. 3091 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3092 &Idents.get("__block_descriptor")); 3093 T->startDefinition(); 3094 3095 QualType FieldTypes[] = { 3096 UnsignedLongTy, 3097 UnsignedLongTy, 3098 }; 3099 3100 const char *FieldNames[] = { 3101 "reserved", 3102 "Size" 3103 }; 3104 3105 for (size_t i = 0; i < 2; ++i) { 3106 FieldDecl *Field = FieldDecl::Create(*this, 3107 T, 3108 SourceLocation(), 3109 &Idents.get(FieldNames[i]), 3110 FieldTypes[i], /*TInfo=*/0, 3111 /*BitWidth=*/0, 3112 /*Mutable=*/false); 3113 Field->setAccess(AS_public); 3114 T->addDecl(Field); 3115 } 3116 3117 T->completeDefinition(); 3118 3119 BlockDescriptorType = T; 3120 3121 return getTagDeclType(BlockDescriptorType); 3122} 3123 3124void ASTContext::setBlockDescriptorType(QualType T) { 3125 const RecordType *Rec = T->getAs<RecordType>(); 3126 assert(Rec && "Invalid BlockDescriptorType"); 3127 BlockDescriptorType = Rec->getDecl(); 3128} 3129 3130QualType ASTContext::getBlockDescriptorExtendedType() { 3131 if (BlockDescriptorExtendedType) 3132 return getTagDeclType(BlockDescriptorExtendedType); 3133 3134 RecordDecl *T; 3135 // FIXME: Needs the FlagAppleBlock bit. 3136 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3137 &Idents.get("__block_descriptor_withcopydispose")); 3138 T->startDefinition(); 3139 3140 QualType FieldTypes[] = { 3141 UnsignedLongTy, 3142 UnsignedLongTy, 3143 getPointerType(VoidPtrTy), 3144 getPointerType(VoidPtrTy) 3145 }; 3146 3147 const char *FieldNames[] = { 3148 "reserved", 3149 "Size", 3150 "CopyFuncPtr", 3151 "DestroyFuncPtr" 3152 }; 3153 3154 for (size_t i = 0; i < 4; ++i) { 3155 FieldDecl *Field = FieldDecl::Create(*this, 3156 T, 3157 SourceLocation(), 3158 &Idents.get(FieldNames[i]), 3159 FieldTypes[i], /*TInfo=*/0, 3160 /*BitWidth=*/0, 3161 /*Mutable=*/false); 3162 Field->setAccess(AS_public); 3163 T->addDecl(Field); 3164 } 3165 3166 T->completeDefinition(); 3167 3168 BlockDescriptorExtendedType = T; 3169 3170 return getTagDeclType(BlockDescriptorExtendedType); 3171} 3172 3173void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3174 const RecordType *Rec = T->getAs<RecordType>(); 3175 assert(Rec && "Invalid BlockDescriptorType"); 3176 BlockDescriptorExtendedType = Rec->getDecl(); 3177} 3178 3179bool ASTContext::BlockRequiresCopying(QualType Ty) { 3180 if (Ty->isBlockPointerType()) 3181 return true; 3182 if (isObjCNSObjectType(Ty)) 3183 return true; 3184 if (Ty->isObjCObjectPointerType()) 3185 return true; 3186 return false; 3187} 3188 3189QualType ASTContext::BuildByRefType(const char *DeclName, QualType Ty) { 3190 // type = struct __Block_byref_1_X { 3191 // void *__isa; 3192 // struct __Block_byref_1_X *__forwarding; 3193 // unsigned int __flags; 3194 // unsigned int __size; 3195 // void *__copy_helper; // as needed 3196 // void *__destroy_help // as needed 3197 // int X; 3198 // } * 3199 3200 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3201 3202 // FIXME: Move up 3203 llvm::SmallString<36> Name; 3204 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3205 ++UniqueBlockByRefTypeID << '_' << DeclName; 3206 RecordDecl *T; 3207 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3208 &Idents.get(Name.str())); 3209 T->startDefinition(); 3210 QualType Int32Ty = IntTy; 3211 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3212 QualType FieldTypes[] = { 3213 getPointerType(VoidPtrTy), 3214 getPointerType(getTagDeclType(T)), 3215 Int32Ty, 3216 Int32Ty, 3217 getPointerType(VoidPtrTy), 3218 getPointerType(VoidPtrTy), 3219 Ty 3220 }; 3221 3222 const char *FieldNames[] = { 3223 "__isa", 3224 "__forwarding", 3225 "__flags", 3226 "__size", 3227 "__copy_helper", 3228 "__destroy_helper", 3229 DeclName, 3230 }; 3231 3232 for (size_t i = 0; i < 7; ++i) { 3233 if (!HasCopyAndDispose && i >=4 && i <= 5) 3234 continue; 3235 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3236 &Idents.get(FieldNames[i]), 3237 FieldTypes[i], /*TInfo=*/0, 3238 /*BitWidth=*/0, /*Mutable=*/false); 3239 Field->setAccess(AS_public); 3240 T->addDecl(Field); 3241 } 3242 3243 T->completeDefinition(); 3244 3245 return getPointerType(getTagDeclType(T)); 3246} 3247 3248 3249QualType ASTContext::getBlockParmType( 3250 bool BlockHasCopyDispose, 3251 llvm::SmallVectorImpl<const Expr *> &Layout) { 3252 3253 // FIXME: Move up 3254 llvm::SmallString<36> Name; 3255 llvm::raw_svector_ostream(Name) << "__block_literal_" 3256 << ++UniqueBlockParmTypeID; 3257 RecordDecl *T; 3258 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3259 &Idents.get(Name.str())); 3260 T->startDefinition(); 3261 QualType FieldTypes[] = { 3262 getPointerType(VoidPtrTy), 3263 IntTy, 3264 IntTy, 3265 getPointerType(VoidPtrTy), 3266 (BlockHasCopyDispose ? 3267 getPointerType(getBlockDescriptorExtendedType()) : 3268 getPointerType(getBlockDescriptorType())) 3269 }; 3270 3271 const char *FieldNames[] = { 3272 "__isa", 3273 "__flags", 3274 "__reserved", 3275 "__FuncPtr", 3276 "__descriptor" 3277 }; 3278 3279 for (size_t i = 0; i < 5; ++i) { 3280 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3281 &Idents.get(FieldNames[i]), 3282 FieldTypes[i], /*TInfo=*/0, 3283 /*BitWidth=*/0, /*Mutable=*/false); 3284 Field->setAccess(AS_public); 3285 T->addDecl(Field); 3286 } 3287 3288 for (unsigned i = 0; i < Layout.size(); ++i) { 3289 const Expr *E = Layout[i]; 3290 3291 QualType FieldType = E->getType(); 3292 IdentifierInfo *FieldName = 0; 3293 if (isa<CXXThisExpr>(E)) { 3294 FieldName = &Idents.get("this"); 3295 } else if (const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E)) { 3296 const ValueDecl *D = BDRE->getDecl(); 3297 FieldName = D->getIdentifier(); 3298 if (BDRE->isByRef()) 3299 FieldType = BuildByRefType(D->getNameAsCString(), FieldType); 3300 } else { 3301 // Padding. 3302 assert(isa<ConstantArrayType>(FieldType) && 3303 isa<DeclRefExpr>(E) && 3304 !cast<DeclRefExpr>(E)->getDecl()->getDeclName() && 3305 "doesn't match characteristics of padding decl"); 3306 } 3307 3308 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3309 FieldName, FieldType, /*TInfo=*/0, 3310 /*BitWidth=*/0, /*Mutable=*/false); 3311 Field->setAccess(AS_public); 3312 T->addDecl(Field); 3313 } 3314 3315 T->completeDefinition(); 3316 3317 return getPointerType(getTagDeclType(T)); 3318} 3319 3320void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3321 const RecordType *Rec = T->getAs<RecordType>(); 3322 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3323 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3324} 3325 3326// This returns true if a type has been typedefed to BOOL: 3327// typedef <type> BOOL; 3328static bool isTypeTypedefedAsBOOL(QualType T) { 3329 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3330 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3331 return II->isStr("BOOL"); 3332 3333 return false; 3334} 3335 3336/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3337/// purpose. 3338CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) { 3339 CharUnits sz = getTypeSizeInChars(type); 3340 3341 // Make all integer and enum types at least as large as an int 3342 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 3343 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3344 // Treat arrays as pointers, since that's how they're passed in. 3345 else if (type->isArrayType()) 3346 sz = getTypeSizeInChars(VoidPtrTy); 3347 return sz; 3348} 3349 3350static inline 3351std::string charUnitsToString(const CharUnits &CU) { 3352 return llvm::itostr(CU.getQuantity()); 3353} 3354 3355/// getObjCEncodingForBlockDecl - Return the encoded type for this block 3356/// declaration. 3357void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3358 std::string& S) { 3359 const BlockDecl *Decl = Expr->getBlockDecl(); 3360 QualType BlockTy = 3361 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3362 // Encode result type. 3363 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3364 // Compute size of all parameters. 3365 // Start with computing size of a pointer in number of bytes. 3366 // FIXME: There might(should) be a better way of doing this computation! 3367 SourceLocation Loc; 3368 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3369 CharUnits ParmOffset = PtrSize; 3370 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3371 E = Decl->param_end(); PI != E; ++PI) { 3372 QualType PType = (*PI)->getType(); 3373 CharUnits sz = getObjCEncodingTypeSize(PType); 3374 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3375 ParmOffset += sz; 3376 } 3377 // Size of the argument frame 3378 S += charUnitsToString(ParmOffset); 3379 // Block pointer and offset. 3380 S += "@?0"; 3381 ParmOffset = PtrSize; 3382 3383 // Argument types. 3384 ParmOffset = PtrSize; 3385 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3386 Decl->param_end(); PI != E; ++PI) { 3387 ParmVarDecl *PVDecl = *PI; 3388 QualType PType = PVDecl->getOriginalType(); 3389 if (const ArrayType *AT = 3390 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3391 // Use array's original type only if it has known number of 3392 // elements. 3393 if (!isa<ConstantArrayType>(AT)) 3394 PType = PVDecl->getType(); 3395 } else if (PType->isFunctionType()) 3396 PType = PVDecl->getType(); 3397 getObjCEncodingForType(PType, S); 3398 S += charUnitsToString(ParmOffset); 3399 ParmOffset += getObjCEncodingTypeSize(PType); 3400 } 3401} 3402 3403/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3404/// declaration. 3405void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3406 std::string& S) { 3407 // FIXME: This is not very efficient. 3408 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3409 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3410 // Encode result type. 3411 getObjCEncodingForType(Decl->getResultType(), S); 3412 // Compute size of all parameters. 3413 // Start with computing size of a pointer in number of bytes. 3414 // FIXME: There might(should) be a better way of doing this computation! 3415 SourceLocation Loc; 3416 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3417 // The first two arguments (self and _cmd) are pointers; account for 3418 // their size. 3419 CharUnits ParmOffset = 2 * PtrSize; 3420 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3421 E = Decl->sel_param_end(); PI != E; ++PI) { 3422 QualType PType = (*PI)->getType(); 3423 CharUnits sz = getObjCEncodingTypeSize(PType); 3424 assert (sz.isPositive() && 3425 "getObjCEncodingForMethodDecl - Incomplete param type"); 3426 ParmOffset += sz; 3427 } 3428 S += charUnitsToString(ParmOffset); 3429 S += "@0:"; 3430 S += charUnitsToString(PtrSize); 3431 3432 // Argument types. 3433 ParmOffset = 2 * PtrSize; 3434 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3435 E = Decl->sel_param_end(); PI != E; ++PI) { 3436 ParmVarDecl *PVDecl = *PI; 3437 QualType PType = PVDecl->getOriginalType(); 3438 if (const ArrayType *AT = 3439 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3440 // Use array's original type only if it has known number of 3441 // elements. 3442 if (!isa<ConstantArrayType>(AT)) 3443 PType = PVDecl->getType(); 3444 } else if (PType->isFunctionType()) 3445 PType = PVDecl->getType(); 3446 // Process argument qualifiers for user supplied arguments; such as, 3447 // 'in', 'inout', etc. 3448 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3449 getObjCEncodingForType(PType, S); 3450 S += charUnitsToString(ParmOffset); 3451 ParmOffset += getObjCEncodingTypeSize(PType); 3452 } 3453} 3454 3455/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3456/// property declaration. If non-NULL, Container must be either an 3457/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3458/// NULL when getting encodings for protocol properties. 3459/// Property attributes are stored as a comma-delimited C string. The simple 3460/// attributes readonly and bycopy are encoded as single characters. The 3461/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3462/// encoded as single characters, followed by an identifier. Property types 3463/// are also encoded as a parametrized attribute. The characters used to encode 3464/// these attributes are defined by the following enumeration: 3465/// @code 3466/// enum PropertyAttributes { 3467/// kPropertyReadOnly = 'R', // property is read-only. 3468/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3469/// kPropertyByref = '&', // property is a reference to the value last assigned 3470/// kPropertyDynamic = 'D', // property is dynamic 3471/// kPropertyGetter = 'G', // followed by getter selector name 3472/// kPropertySetter = 'S', // followed by setter selector name 3473/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3474/// kPropertyType = 't' // followed by old-style type encoding. 3475/// kPropertyWeak = 'W' // 'weak' property 3476/// kPropertyStrong = 'P' // property GC'able 3477/// kPropertyNonAtomic = 'N' // property non-atomic 3478/// }; 3479/// @endcode 3480void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3481 const Decl *Container, 3482 std::string& S) { 3483 // Collect information from the property implementation decl(s). 3484 bool Dynamic = false; 3485 ObjCPropertyImplDecl *SynthesizePID = 0; 3486 3487 // FIXME: Duplicated code due to poor abstraction. 3488 if (Container) { 3489 if (const ObjCCategoryImplDecl *CID = 3490 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3491 for (ObjCCategoryImplDecl::propimpl_iterator 3492 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3493 i != e; ++i) { 3494 ObjCPropertyImplDecl *PID = *i; 3495 if (PID->getPropertyDecl() == PD) { 3496 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3497 Dynamic = true; 3498 } else { 3499 SynthesizePID = PID; 3500 } 3501 } 3502 } 3503 } else { 3504 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3505 for (ObjCCategoryImplDecl::propimpl_iterator 3506 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3507 i != e; ++i) { 3508 ObjCPropertyImplDecl *PID = *i; 3509 if (PID->getPropertyDecl() == PD) { 3510 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3511 Dynamic = true; 3512 } else { 3513 SynthesizePID = PID; 3514 } 3515 } 3516 } 3517 } 3518 } 3519 3520 // FIXME: This is not very efficient. 3521 S = "T"; 3522 3523 // Encode result type. 3524 // GCC has some special rules regarding encoding of properties which 3525 // closely resembles encoding of ivars. 3526 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3527 true /* outermost type */, 3528 true /* encoding for property */); 3529 3530 if (PD->isReadOnly()) { 3531 S += ",R"; 3532 } else { 3533 switch (PD->getSetterKind()) { 3534 case ObjCPropertyDecl::Assign: break; 3535 case ObjCPropertyDecl::Copy: S += ",C"; break; 3536 case ObjCPropertyDecl::Retain: S += ",&"; break; 3537 } 3538 } 3539 3540 // It really isn't clear at all what this means, since properties 3541 // are "dynamic by default". 3542 if (Dynamic) 3543 S += ",D"; 3544 3545 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3546 S += ",N"; 3547 3548 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3549 S += ",G"; 3550 S += PD->getGetterName().getAsString(); 3551 } 3552 3553 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3554 S += ",S"; 3555 S += PD->getSetterName().getAsString(); 3556 } 3557 3558 if (SynthesizePID) { 3559 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3560 S += ",V"; 3561 S += OID->getNameAsString(); 3562 } 3563 3564 // FIXME: OBJCGC: weak & strong 3565} 3566 3567/// getLegacyIntegralTypeEncoding - 3568/// Another legacy compatibility encoding: 32-bit longs are encoded as 3569/// 'l' or 'L' , but not always. For typedefs, we need to use 3570/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3571/// 3572void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3573 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3574 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3575 if (BT->getKind() == BuiltinType::ULong && 3576 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3577 PointeeTy = UnsignedIntTy; 3578 else 3579 if (BT->getKind() == BuiltinType::Long && 3580 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3581 PointeeTy = IntTy; 3582 } 3583 } 3584} 3585 3586void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3587 const FieldDecl *Field) { 3588 // We follow the behavior of gcc, expanding structures which are 3589 // directly pointed to, and expanding embedded structures. Note that 3590 // these rules are sufficient to prevent recursive encoding of the 3591 // same type. 3592 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3593 true /* outermost type */); 3594} 3595 3596static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 3597 switch (T->getAs<BuiltinType>()->getKind()) { 3598 default: assert(0 && "Unhandled builtin type kind"); 3599 case BuiltinType::Void: return 'v'; 3600 case BuiltinType::Bool: return 'B'; 3601 case BuiltinType::Char_U: 3602 case BuiltinType::UChar: return 'C'; 3603 case BuiltinType::UShort: return 'S'; 3604 case BuiltinType::UInt: return 'I'; 3605 case BuiltinType::ULong: 3606 return 3607 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3608 case BuiltinType::UInt128: return 'T'; 3609 case BuiltinType::ULongLong: return 'Q'; 3610 case BuiltinType::Char_S: 3611 case BuiltinType::SChar: return 'c'; 3612 case BuiltinType::Short: return 's'; 3613 case BuiltinType::WChar: 3614 case BuiltinType::Int: return 'i'; 3615 case BuiltinType::Long: 3616 return 3617 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'l' : 'q'; 3618 case BuiltinType::LongLong: return 'q'; 3619 case BuiltinType::Int128: return 't'; 3620 case BuiltinType::Float: return 'f'; 3621 case BuiltinType::Double: return 'd'; 3622 case BuiltinType::LongDouble: return 'd'; 3623 } 3624} 3625 3626static void EncodeBitField(const ASTContext *Context, std::string& S, 3627 QualType T, const FieldDecl *FD) { 3628 const Expr *E = FD->getBitWidth(); 3629 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3630 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3631 S += 'b'; 3632 // The NeXT runtime encodes bit fields as b followed by the number of bits. 3633 // The GNU runtime requires more information; bitfields are encoded as b, 3634 // then the offset (in bits) of the first element, then the type of the 3635 // bitfield, then the size in bits. For example, in this structure: 3636 // 3637 // struct 3638 // { 3639 // int integer; 3640 // int flags:2; 3641 // }; 3642 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 3643 // runtime, but b32i2 for the GNU runtime. The reason for this extra 3644 // information is not especially sensible, but we're stuck with it for 3645 // compatibility with GCC, although providing it breaks anything that 3646 // actually uses runtime introspection and wants to work on both runtimes... 3647 if (!Ctx->getLangOptions().NeXTRuntime) { 3648 const RecordDecl *RD = FD->getParent(); 3649 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 3650 // FIXME: This same linear search is also used in ExprConstant - it might 3651 // be better if the FieldDecl stored its offset. We'd be increasing the 3652 // size of the object slightly, but saving some time every time it is used. 3653 unsigned i = 0; 3654 for (RecordDecl::field_iterator Field = RD->field_begin(), 3655 FieldEnd = RD->field_end(); 3656 Field != FieldEnd; (void)++Field, ++i) { 3657 if (*Field == FD) 3658 break; 3659 } 3660 S += llvm::utostr(RL.getFieldOffset(i)); 3661 S += ObjCEncodingForPrimitiveKind(Context, T); 3662 } 3663 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3664 S += llvm::utostr(N); 3665} 3666 3667// FIXME: Use SmallString for accumulating string. 3668void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3669 bool ExpandPointedToStructures, 3670 bool ExpandStructures, 3671 const FieldDecl *FD, 3672 bool OutermostType, 3673 bool EncodingProperty) { 3674 if (T->getAs<BuiltinType>()) { 3675 if (FD && FD->isBitField()) 3676 return EncodeBitField(this, S, T, FD); 3677 S += ObjCEncodingForPrimitiveKind(this, T); 3678 return; 3679 } 3680 3681 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3682 S += 'j'; 3683 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3684 false); 3685 return; 3686 } 3687 3688 // encoding for pointer or r3eference types. 3689 QualType PointeeTy; 3690 if (const PointerType *PT = T->getAs<PointerType>()) { 3691 if (PT->isObjCSelType()) { 3692 S += ':'; 3693 return; 3694 } 3695 PointeeTy = PT->getPointeeType(); 3696 } 3697 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3698 PointeeTy = RT->getPointeeType(); 3699 if (!PointeeTy.isNull()) { 3700 bool isReadOnly = false; 3701 // For historical/compatibility reasons, the read-only qualifier of the 3702 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3703 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3704 // Also, do not emit the 'r' for anything but the outermost type! 3705 if (isa<TypedefType>(T.getTypePtr())) { 3706 if (OutermostType && T.isConstQualified()) { 3707 isReadOnly = true; 3708 S += 'r'; 3709 } 3710 } else if (OutermostType) { 3711 QualType P = PointeeTy; 3712 while (P->getAs<PointerType>()) 3713 P = P->getAs<PointerType>()->getPointeeType(); 3714 if (P.isConstQualified()) { 3715 isReadOnly = true; 3716 S += 'r'; 3717 } 3718 } 3719 if (isReadOnly) { 3720 // Another legacy compatibility encoding. Some ObjC qualifier and type 3721 // combinations need to be rearranged. 3722 // Rewrite "in const" from "nr" to "rn" 3723 if (llvm::StringRef(S).endswith("nr")) 3724 S.replace(S.end()-2, S.end(), "rn"); 3725 } 3726 3727 if (PointeeTy->isCharType()) { 3728 // char pointer types should be encoded as '*' unless it is a 3729 // type that has been typedef'd to 'BOOL'. 3730 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3731 S += '*'; 3732 return; 3733 } 3734 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3735 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3736 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3737 S += '#'; 3738 return; 3739 } 3740 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3741 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3742 S += '@'; 3743 return; 3744 } 3745 // fall through... 3746 } 3747 S += '^'; 3748 getLegacyIntegralTypeEncoding(PointeeTy); 3749 3750 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3751 NULL); 3752 return; 3753 } 3754 3755 if (const ArrayType *AT = 3756 // Ignore type qualifiers etc. 3757 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3758 if (isa<IncompleteArrayType>(AT)) { 3759 // Incomplete arrays are encoded as a pointer to the array element. 3760 S += '^'; 3761 3762 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3763 false, ExpandStructures, FD); 3764 } else { 3765 S += '['; 3766 3767 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3768 S += llvm::utostr(CAT->getSize().getZExtValue()); 3769 else { 3770 //Variable length arrays are encoded as a regular array with 0 elements. 3771 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3772 S += '0'; 3773 } 3774 3775 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3776 false, ExpandStructures, FD); 3777 S += ']'; 3778 } 3779 return; 3780 } 3781 3782 if (T->getAs<FunctionType>()) { 3783 S += '?'; 3784 return; 3785 } 3786 3787 if (const RecordType *RTy = T->getAs<RecordType>()) { 3788 RecordDecl *RDecl = RTy->getDecl(); 3789 S += RDecl->isUnion() ? '(' : '{'; 3790 // Anonymous structures print as '?' 3791 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3792 S += II->getName(); 3793 if (ClassTemplateSpecializationDecl *Spec 3794 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 3795 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 3796 std::string TemplateArgsStr 3797 = TemplateSpecializationType::PrintTemplateArgumentList( 3798 TemplateArgs.getFlatArgumentList(), 3799 TemplateArgs.flat_size(), 3800 (*this).PrintingPolicy); 3801 3802 S += TemplateArgsStr; 3803 } 3804 } else { 3805 S += '?'; 3806 } 3807 if (ExpandStructures) { 3808 S += '='; 3809 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3810 FieldEnd = RDecl->field_end(); 3811 Field != FieldEnd; ++Field) { 3812 if (FD) { 3813 S += '"'; 3814 S += Field->getNameAsString(); 3815 S += '"'; 3816 } 3817 3818 // Special case bit-fields. 3819 if (Field->isBitField()) { 3820 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3821 (*Field)); 3822 } else { 3823 QualType qt = Field->getType(); 3824 getLegacyIntegralTypeEncoding(qt); 3825 getObjCEncodingForTypeImpl(qt, S, false, true, 3826 FD); 3827 } 3828 } 3829 } 3830 S += RDecl->isUnion() ? ')' : '}'; 3831 return; 3832 } 3833 3834 if (T->isEnumeralType()) { 3835 if (FD && FD->isBitField()) 3836 EncodeBitField(this, S, T, FD); 3837 else 3838 S += 'i'; 3839 return; 3840 } 3841 3842 if (T->isBlockPointerType()) { 3843 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3844 return; 3845 } 3846 3847 // Ignore protocol qualifiers when mangling at this level. 3848 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 3849 T = OT->getBaseType(); 3850 3851 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3852 // @encode(class_name) 3853 ObjCInterfaceDecl *OI = OIT->getDecl(); 3854 S += '{'; 3855 const IdentifierInfo *II = OI->getIdentifier(); 3856 S += II->getName(); 3857 S += '='; 3858 llvm::SmallVector<FieldDecl*, 32> RecFields; 3859 CollectObjCIvars(OI, RecFields); 3860 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 3861 if (RecFields[i]->isBitField()) 3862 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3863 RecFields[i]); 3864 else 3865 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3866 FD); 3867 } 3868 S += '}'; 3869 return; 3870 } 3871 3872 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 3873 if (OPT->isObjCIdType()) { 3874 S += '@'; 3875 return; 3876 } 3877 3878 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 3879 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 3880 // Since this is a binary compatibility issue, need to consult with runtime 3881 // folks. Fortunately, this is a *very* obsure construct. 3882 S += '#'; 3883 return; 3884 } 3885 3886 if (OPT->isObjCQualifiedIdType()) { 3887 getObjCEncodingForTypeImpl(getObjCIdType(), S, 3888 ExpandPointedToStructures, 3889 ExpandStructures, FD); 3890 if (FD || EncodingProperty) { 3891 // Note that we do extended encoding of protocol qualifer list 3892 // Only when doing ivar or property encoding. 3893 S += '"'; 3894 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3895 E = OPT->qual_end(); I != E; ++I) { 3896 S += '<'; 3897 S += (*I)->getNameAsString(); 3898 S += '>'; 3899 } 3900 S += '"'; 3901 } 3902 return; 3903 } 3904 3905 QualType PointeeTy = OPT->getPointeeType(); 3906 if (!EncodingProperty && 3907 isa<TypedefType>(PointeeTy.getTypePtr())) { 3908 // Another historical/compatibility reason. 3909 // We encode the underlying type which comes out as 3910 // {...}; 3911 S += '^'; 3912 getObjCEncodingForTypeImpl(PointeeTy, S, 3913 false, ExpandPointedToStructures, 3914 NULL); 3915 return; 3916 } 3917 3918 S += '@'; 3919 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 3920 S += '"'; 3921 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 3922 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3923 E = OPT->qual_end(); I != E; ++I) { 3924 S += '<'; 3925 S += (*I)->getNameAsString(); 3926 S += '>'; 3927 } 3928 S += '"'; 3929 } 3930 return; 3931 } 3932 3933 // gcc just blithely ignores member pointers. 3934 // TODO: maybe there should be a mangling for these 3935 if (T->getAs<MemberPointerType>()) 3936 return; 3937 3938 assert(0 && "@encode for type not implemented!"); 3939} 3940 3941void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 3942 std::string& S) const { 3943 if (QT & Decl::OBJC_TQ_In) 3944 S += 'n'; 3945 if (QT & Decl::OBJC_TQ_Inout) 3946 S += 'N'; 3947 if (QT & Decl::OBJC_TQ_Out) 3948 S += 'o'; 3949 if (QT & Decl::OBJC_TQ_Bycopy) 3950 S += 'O'; 3951 if (QT & Decl::OBJC_TQ_Byref) 3952 S += 'R'; 3953 if (QT & Decl::OBJC_TQ_Oneway) 3954 S += 'V'; 3955} 3956 3957void ASTContext::setBuiltinVaListType(QualType T) { 3958 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 3959 3960 BuiltinVaListType = T; 3961} 3962 3963void ASTContext::setObjCIdType(QualType T) { 3964 ObjCIdTypedefType = T; 3965} 3966 3967void ASTContext::setObjCSelType(QualType T) { 3968 ObjCSelTypedefType = T; 3969} 3970 3971void ASTContext::setObjCProtoType(QualType QT) { 3972 ObjCProtoType = QT; 3973} 3974 3975void ASTContext::setObjCClassType(QualType T) { 3976 ObjCClassTypedefType = T; 3977} 3978 3979void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 3980 assert(ObjCConstantStringType.isNull() && 3981 "'NSConstantString' type already set!"); 3982 3983 ObjCConstantStringType = getObjCInterfaceType(Decl); 3984} 3985 3986/// \brief Retrieve the template name that corresponds to a non-empty 3987/// lookup. 3988TemplateName ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 3989 UnresolvedSetIterator End) { 3990 unsigned size = End - Begin; 3991 assert(size > 1 && "set is not overloaded!"); 3992 3993 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 3994 size * sizeof(FunctionTemplateDecl*)); 3995 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 3996 3997 NamedDecl **Storage = OT->getStorage(); 3998 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 3999 NamedDecl *D = *I; 4000 assert(isa<FunctionTemplateDecl>(D) || 4001 (isa<UsingShadowDecl>(D) && 4002 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 4003 *Storage++ = D; 4004 } 4005 4006 return TemplateName(OT); 4007} 4008 4009/// \brief Retrieve the template name that represents a qualified 4010/// template name such as \c std::vector. 4011TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 4012 bool TemplateKeyword, 4013 TemplateDecl *Template) { 4014 // FIXME: Canonicalization? 4015 llvm::FoldingSetNodeID ID; 4016 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 4017 4018 void *InsertPos = 0; 4019 QualifiedTemplateName *QTN = 4020 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4021 if (!QTN) { 4022 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 4023 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 4024 } 4025 4026 return TemplateName(QTN); 4027} 4028 4029/// \brief Retrieve the template name that represents a dependent 4030/// template name such as \c MetaFun::template apply. 4031TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4032 const IdentifierInfo *Name) { 4033 assert((!NNS || NNS->isDependent()) && 4034 "Nested name specifier must be dependent"); 4035 4036 llvm::FoldingSetNodeID ID; 4037 DependentTemplateName::Profile(ID, NNS, Name); 4038 4039 void *InsertPos = 0; 4040 DependentTemplateName *QTN = 4041 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4042 4043 if (QTN) 4044 return TemplateName(QTN); 4045 4046 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4047 if (CanonNNS == NNS) { 4048 QTN = new (*this,4) DependentTemplateName(NNS, Name); 4049 } else { 4050 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 4051 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 4052 DependentTemplateName *CheckQTN = 4053 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4054 assert(!CheckQTN && "Dependent type name canonicalization broken"); 4055 (void)CheckQTN; 4056 } 4057 4058 DependentTemplateNames.InsertNode(QTN, InsertPos); 4059 return TemplateName(QTN); 4060} 4061 4062/// \brief Retrieve the template name that represents a dependent 4063/// template name such as \c MetaFun::template operator+. 4064TemplateName 4065ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4066 OverloadedOperatorKind Operator) { 4067 assert((!NNS || NNS->isDependent()) && 4068 "Nested name specifier must be dependent"); 4069 4070 llvm::FoldingSetNodeID ID; 4071 DependentTemplateName::Profile(ID, NNS, Operator); 4072 4073 void *InsertPos = 0; 4074 DependentTemplateName *QTN 4075 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4076 4077 if (QTN) 4078 return TemplateName(QTN); 4079 4080 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4081 if (CanonNNS == NNS) { 4082 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 4083 } else { 4084 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 4085 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 4086 4087 DependentTemplateName *CheckQTN 4088 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4089 assert(!CheckQTN && "Dependent template name canonicalization broken"); 4090 (void)CheckQTN; 4091 } 4092 4093 DependentTemplateNames.InsertNode(QTN, InsertPos); 4094 return TemplateName(QTN); 4095} 4096 4097/// getFromTargetType - Given one of the integer types provided by 4098/// TargetInfo, produce the corresponding type. The unsigned @p Type 4099/// is actually a value of type @c TargetInfo::IntType. 4100CanQualType ASTContext::getFromTargetType(unsigned Type) const { 4101 switch (Type) { 4102 case TargetInfo::NoInt: return CanQualType(); 4103 case TargetInfo::SignedShort: return ShortTy; 4104 case TargetInfo::UnsignedShort: return UnsignedShortTy; 4105 case TargetInfo::SignedInt: return IntTy; 4106 case TargetInfo::UnsignedInt: return UnsignedIntTy; 4107 case TargetInfo::SignedLong: return LongTy; 4108 case TargetInfo::UnsignedLong: return UnsignedLongTy; 4109 case TargetInfo::SignedLongLong: return LongLongTy; 4110 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 4111 } 4112 4113 assert(false && "Unhandled TargetInfo::IntType value"); 4114 return CanQualType(); 4115} 4116 4117//===----------------------------------------------------------------------===// 4118// Type Predicates. 4119//===----------------------------------------------------------------------===// 4120 4121/// isObjCNSObjectType - Return true if this is an NSObject object using 4122/// NSObject attribute on a c-style pointer type. 4123/// FIXME - Make it work directly on types. 4124/// FIXME: Move to Type. 4125/// 4126bool ASTContext::isObjCNSObjectType(QualType Ty) const { 4127 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 4128 if (TypedefDecl *TD = TDT->getDecl()) 4129 if (TD->getAttr<ObjCNSObjectAttr>()) 4130 return true; 4131 } 4132 return false; 4133} 4134 4135/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 4136/// garbage collection attribute. 4137/// 4138Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 4139 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 4140 if (getLangOptions().ObjC1 && 4141 getLangOptions().getGCMode() != LangOptions::NonGC) { 4142 GCAttrs = Ty.getObjCGCAttr(); 4143 // Default behavious under objective-c's gc is for objective-c pointers 4144 // (or pointers to them) be treated as though they were declared 4145 // as __strong. 4146 if (GCAttrs == Qualifiers::GCNone) { 4147 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 4148 GCAttrs = Qualifiers::Strong; 4149 else if (Ty->isPointerType()) 4150 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 4151 } 4152 // Non-pointers have none gc'able attribute regardless of the attribute 4153 // set on them. 4154 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 4155 return Qualifiers::GCNone; 4156 } 4157 return GCAttrs; 4158} 4159 4160//===----------------------------------------------------------------------===// 4161// Type Compatibility Testing 4162//===----------------------------------------------------------------------===// 4163 4164/// areCompatVectorTypes - Return true if the two specified vector types are 4165/// compatible. 4166static bool areCompatVectorTypes(const VectorType *LHS, 4167 const VectorType *RHS) { 4168 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 4169 return LHS->getElementType() == RHS->getElementType() && 4170 LHS->getNumElements() == RHS->getNumElements(); 4171} 4172 4173bool ASTContext::areCompatibleVectorTypes(QualType FirstVec, 4174 QualType SecondVec) { 4175 assert(FirstVec->isVectorType() && "FirstVec should be a vector type"); 4176 assert(SecondVec->isVectorType() && "SecondVec should be a vector type"); 4177 4178 if (hasSameUnqualifiedType(FirstVec, SecondVec)) 4179 return true; 4180 4181 // AltiVec vectors types are identical to equivalent GCC vector types 4182 const VectorType *First = FirstVec->getAs<VectorType>(); 4183 const VectorType *Second = SecondVec->getAs<VectorType>(); 4184 if ((((First->getAltiVecSpecific() == VectorType::AltiVec) && 4185 (Second->getAltiVecSpecific() == VectorType::NotAltiVec)) || 4186 ((First->getAltiVecSpecific() == VectorType::NotAltiVec) && 4187 (Second->getAltiVecSpecific() == VectorType::AltiVec))) && 4188 hasSameType(First->getElementType(), Second->getElementType()) && 4189 (First->getNumElements() == Second->getNumElements())) 4190 return true; 4191 4192 return false; 4193} 4194 4195//===----------------------------------------------------------------------===// 4196// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 4197//===----------------------------------------------------------------------===// 4198 4199/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 4200/// inheritance hierarchy of 'rProto'. 4201bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 4202 ObjCProtocolDecl *rProto) { 4203 if (lProto == rProto) 4204 return true; 4205 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 4206 E = rProto->protocol_end(); PI != E; ++PI) 4207 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 4208 return true; 4209 return false; 4210} 4211 4212/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 4213/// return true if lhs's protocols conform to rhs's protocol; false 4214/// otherwise. 4215bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 4216 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 4217 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 4218 return false; 4219} 4220 4221/// ObjCQualifiedClassTypesAreCompatible - compare Class<p,...> and 4222/// Class<p1, ...>. 4223bool ASTContext::ObjCQualifiedClassTypesAreCompatible(QualType lhs, 4224 QualType rhs) { 4225 const ObjCObjectPointerType *lhsQID = lhs->getAs<ObjCObjectPointerType>(); 4226 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4227 assert ((lhsQID && rhsOPT) && "ObjCQualifiedClassTypesAreCompatible"); 4228 4229 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4230 E = lhsQID->qual_end(); I != E; ++I) { 4231 bool match = false; 4232 ObjCProtocolDecl *lhsProto = *I; 4233 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4234 E = rhsOPT->qual_end(); J != E; ++J) { 4235 ObjCProtocolDecl *rhsProto = *J; 4236 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto)) { 4237 match = true; 4238 break; 4239 } 4240 } 4241 if (!match) 4242 return false; 4243 } 4244 return true; 4245} 4246 4247/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 4248/// ObjCQualifiedIDType. 4249bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4250 bool compare) { 4251 // Allow id<P..> and an 'id' or void* type in all cases. 4252 if (lhs->isVoidPointerType() || 4253 lhs->isObjCIdType() || lhs->isObjCClassType()) 4254 return true; 4255 else if (rhs->isVoidPointerType() || 4256 rhs->isObjCIdType() || rhs->isObjCClassType()) 4257 return true; 4258 4259 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4260 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4261 4262 if (!rhsOPT) return false; 4263 4264 if (rhsOPT->qual_empty()) { 4265 // If the RHS is a unqualified interface pointer "NSString*", 4266 // make sure we check the class hierarchy. 4267 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4268 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4269 E = lhsQID->qual_end(); I != E; ++I) { 4270 // when comparing an id<P> on lhs with a static type on rhs, 4271 // see if static class implements all of id's protocols, directly or 4272 // through its super class and categories. 4273 if (!rhsID->ClassImplementsProtocol(*I, true)) 4274 return false; 4275 } 4276 } 4277 // If there are no qualifiers and no interface, we have an 'id'. 4278 return true; 4279 } 4280 // Both the right and left sides have qualifiers. 4281 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4282 E = lhsQID->qual_end(); I != E; ++I) { 4283 ObjCProtocolDecl *lhsProto = *I; 4284 bool match = false; 4285 4286 // when comparing an id<P> on lhs with a static type on rhs, 4287 // see if static class implements all of id's protocols, directly or 4288 // through its super class and categories. 4289 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4290 E = rhsOPT->qual_end(); J != E; ++J) { 4291 ObjCProtocolDecl *rhsProto = *J; 4292 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4293 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4294 match = true; 4295 break; 4296 } 4297 } 4298 // If the RHS is a qualified interface pointer "NSString<P>*", 4299 // make sure we check the class hierarchy. 4300 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4301 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4302 E = lhsQID->qual_end(); I != E; ++I) { 4303 // when comparing an id<P> on lhs with a static type on rhs, 4304 // see if static class implements all of id's protocols, directly or 4305 // through its super class and categories. 4306 if (rhsID->ClassImplementsProtocol(*I, true)) { 4307 match = true; 4308 break; 4309 } 4310 } 4311 } 4312 if (!match) 4313 return false; 4314 } 4315 4316 return true; 4317 } 4318 4319 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4320 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4321 4322 if (const ObjCObjectPointerType *lhsOPT = 4323 lhs->getAsObjCInterfacePointerType()) { 4324 if (lhsOPT->qual_empty()) { 4325 bool match = false; 4326 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4327 for (ObjCObjectPointerType::qual_iterator I = rhsQID->qual_begin(), 4328 E = rhsQID->qual_end(); I != E; ++I) { 4329 // when comparing an id<P> on rhs with a static type on lhs, 4330 // static class must implement all of id's protocols directly or 4331 // indirectly through its super class. 4332 if (lhsID->ClassImplementsProtocol(*I, true)) { 4333 match = true; 4334 break; 4335 } 4336 } 4337 if (!match) 4338 return false; 4339 } 4340 return true; 4341 } 4342 // Both the right and left sides have qualifiers. 4343 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4344 E = lhsOPT->qual_end(); I != E; ++I) { 4345 ObjCProtocolDecl *lhsProto = *I; 4346 bool match = false; 4347 4348 // when comparing an id<P> on lhs with a static type on rhs, 4349 // see if static class implements all of id's protocols, directly or 4350 // through its super class and categories. 4351 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4352 E = rhsQID->qual_end(); J != E; ++J) { 4353 ObjCProtocolDecl *rhsProto = *J; 4354 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4355 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4356 match = true; 4357 break; 4358 } 4359 } 4360 if (!match) 4361 return false; 4362 } 4363 return true; 4364 } 4365 return false; 4366} 4367 4368/// canAssignObjCInterfaces - Return true if the two interface types are 4369/// compatible for assignment from RHS to LHS. This handles validation of any 4370/// protocol qualifiers on the LHS or RHS. 4371/// 4372bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4373 const ObjCObjectPointerType *RHSOPT) { 4374 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4375 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4376 4377 // If either type represents the built-in 'id' or 'Class' types, return true. 4378 if (LHS->isObjCUnqualifiedIdOrClass() || 4379 RHS->isObjCUnqualifiedIdOrClass()) 4380 return true; 4381 4382 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 4383 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4384 QualType(RHSOPT,0), 4385 false); 4386 4387 if (LHS->isObjCQualifiedClass() && RHS->isObjCQualifiedClass()) 4388 return ObjCQualifiedClassTypesAreCompatible(QualType(LHSOPT,0), 4389 QualType(RHSOPT,0)); 4390 4391 // If we have 2 user-defined types, fall into that path. 4392 if (LHS->getInterface() && RHS->getInterface()) 4393 return canAssignObjCInterfaces(LHS, RHS); 4394 4395 return false; 4396} 4397 4398/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4399/// for providing type-safty for objective-c pointers used to pass/return 4400/// arguments in block literals. When passed as arguments, passing 'A*' where 4401/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4402/// not OK. For the return type, the opposite is not OK. 4403bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4404 const ObjCObjectPointerType *LHSOPT, 4405 const ObjCObjectPointerType *RHSOPT) { 4406 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4407 return true; 4408 4409 if (LHSOPT->isObjCBuiltinType()) { 4410 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4411 } 4412 4413 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4414 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4415 QualType(RHSOPT,0), 4416 false); 4417 4418 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4419 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4420 if (LHS && RHS) { // We have 2 user-defined types. 4421 if (LHS != RHS) { 4422 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4423 return false; 4424 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4425 return true; 4426 } 4427 else 4428 return true; 4429 } 4430 return false; 4431} 4432 4433/// getIntersectionOfProtocols - This routine finds the intersection of set 4434/// of protocols inherited from two distinct objective-c pointer objects. 4435/// It is used to build composite qualifier list of the composite type of 4436/// the conditional expression involving two objective-c pointer objects. 4437static 4438void getIntersectionOfProtocols(ASTContext &Context, 4439 const ObjCObjectPointerType *LHSOPT, 4440 const ObjCObjectPointerType *RHSOPT, 4441 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4442 4443 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4444 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4445 assert(LHS->getInterface() && "LHS must have an interface base"); 4446 assert(RHS->getInterface() && "RHS must have an interface base"); 4447 4448 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4449 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4450 if (LHSNumProtocols > 0) 4451 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4452 else { 4453 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4454 Context.CollectInheritedProtocols(LHS->getInterface(), 4455 LHSInheritedProtocols); 4456 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4457 LHSInheritedProtocols.end()); 4458 } 4459 4460 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4461 if (RHSNumProtocols > 0) { 4462 ObjCProtocolDecl **RHSProtocols = 4463 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4464 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4465 if (InheritedProtocolSet.count(RHSProtocols[i])) 4466 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4467 } 4468 else { 4469 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4470 Context.CollectInheritedProtocols(RHS->getInterface(), 4471 RHSInheritedProtocols); 4472 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4473 RHSInheritedProtocols.begin(), 4474 E = RHSInheritedProtocols.end(); I != E; ++I) 4475 if (InheritedProtocolSet.count((*I))) 4476 IntersectionOfProtocols.push_back((*I)); 4477 } 4478} 4479 4480/// areCommonBaseCompatible - Returns common base class of the two classes if 4481/// one found. Note that this is O'2 algorithm. But it will be called as the 4482/// last type comparison in a ?-exp of ObjC pointer types before a 4483/// warning is issued. So, its invokation is extremely rare. 4484QualType ASTContext::areCommonBaseCompatible( 4485 const ObjCObjectPointerType *Lptr, 4486 const ObjCObjectPointerType *Rptr) { 4487 const ObjCObjectType *LHS = Lptr->getObjectType(); 4488 const ObjCObjectType *RHS = Rptr->getObjectType(); 4489 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 4490 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 4491 if (!LDecl || !RDecl) 4492 return QualType(); 4493 4494 while ((LDecl = LDecl->getSuperClass())) { 4495 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 4496 if (canAssignObjCInterfaces(LHS, RHS)) { 4497 llvm::SmallVector<ObjCProtocolDecl *, 8> Protocols; 4498 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 4499 4500 QualType Result = QualType(LHS, 0); 4501 if (!Protocols.empty()) 4502 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 4503 Result = getObjCObjectPointerType(Result); 4504 return Result; 4505 } 4506 } 4507 4508 return QualType(); 4509} 4510 4511bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 4512 const ObjCObjectType *RHS) { 4513 assert(LHS->getInterface() && "LHS is not an interface type"); 4514 assert(RHS->getInterface() && "RHS is not an interface type"); 4515 4516 // Verify that the base decls are compatible: the RHS must be a subclass of 4517 // the LHS. 4518 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 4519 return false; 4520 4521 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4522 // protocol qualified at all, then we are good. 4523 if (LHS->getNumProtocols() == 0) 4524 return true; 4525 4526 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4527 // isn't a superset. 4528 if (RHS->getNumProtocols() == 0) 4529 return true; // FIXME: should return false! 4530 4531 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 4532 LHSPE = LHS->qual_end(); 4533 LHSPI != LHSPE; LHSPI++) { 4534 bool RHSImplementsProtocol = false; 4535 4536 // If the RHS doesn't implement the protocol on the left, the types 4537 // are incompatible. 4538 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 4539 RHSPE = RHS->qual_end(); 4540 RHSPI != RHSPE; RHSPI++) { 4541 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4542 RHSImplementsProtocol = true; 4543 break; 4544 } 4545 } 4546 // FIXME: For better diagnostics, consider passing back the protocol name. 4547 if (!RHSImplementsProtocol) 4548 return false; 4549 } 4550 // The RHS implements all protocols listed on the LHS. 4551 return true; 4552} 4553 4554bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4555 // get the "pointed to" types 4556 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4557 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4558 4559 if (!LHSOPT || !RHSOPT) 4560 return false; 4561 4562 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4563 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4564} 4565 4566bool ASTContext::canBindObjCObjectType(QualType To, QualType From) { 4567 return canAssignObjCInterfaces( 4568 getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(), 4569 getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>()); 4570} 4571 4572/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4573/// both shall have the identically qualified version of a compatible type. 4574/// C99 6.2.7p1: Two types have compatible types if their types are the 4575/// same. See 6.7.[2,3,5] for additional rules. 4576bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS, 4577 bool CompareUnqualified) { 4578 if (getLangOptions().CPlusPlus) 4579 return hasSameType(LHS, RHS); 4580 4581 return !mergeTypes(LHS, RHS, false, CompareUnqualified).isNull(); 4582} 4583 4584bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 4585 return !mergeTypes(LHS, RHS, true).isNull(); 4586} 4587 4588QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 4589 bool OfBlockPointer, 4590 bool Unqualified) { 4591 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4592 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4593 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4594 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4595 bool allLTypes = true; 4596 bool allRTypes = true; 4597 4598 // Check return type 4599 QualType retType; 4600 if (OfBlockPointer) 4601 retType = mergeTypes(rbase->getResultType(), lbase->getResultType(), true, 4602 Unqualified); 4603 else 4604 retType = mergeTypes(lbase->getResultType(), rbase->getResultType(), 4605 false, Unqualified); 4606 if (retType.isNull()) return QualType(); 4607 4608 if (Unqualified) 4609 retType = retType.getUnqualifiedType(); 4610 4611 CanQualType LRetType = getCanonicalType(lbase->getResultType()); 4612 CanQualType RRetType = getCanonicalType(rbase->getResultType()); 4613 if (Unqualified) { 4614 LRetType = LRetType.getUnqualifiedType(); 4615 RRetType = RRetType.getUnqualifiedType(); 4616 } 4617 4618 if (getCanonicalType(retType) != LRetType) 4619 allLTypes = false; 4620 if (getCanonicalType(retType) != RRetType) 4621 allRTypes = false; 4622 // FIXME: double check this 4623 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 4624 // rbase->getRegParmAttr() != 0 && 4625 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 4626 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 4627 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 4628 unsigned RegParm = lbaseInfo.getRegParm() == 0 ? rbaseInfo.getRegParm() : 4629 lbaseInfo.getRegParm(); 4630 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 4631 if (NoReturn != lbaseInfo.getNoReturn() || 4632 RegParm != lbaseInfo.getRegParm()) 4633 allLTypes = false; 4634 if (NoReturn != rbaseInfo.getNoReturn() || 4635 RegParm != rbaseInfo.getRegParm()) 4636 allRTypes = false; 4637 CallingConv lcc = lbaseInfo.getCC(); 4638 CallingConv rcc = rbaseInfo.getCC(); 4639 // Compatible functions must have compatible calling conventions 4640 if (!isSameCallConv(lcc, rcc)) 4641 return QualType(); 4642 4643 if (lproto && rproto) { // two C99 style function prototypes 4644 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4645 "C++ shouldn't be here"); 4646 unsigned lproto_nargs = lproto->getNumArgs(); 4647 unsigned rproto_nargs = rproto->getNumArgs(); 4648 4649 // Compatible functions must have the same number of arguments 4650 if (lproto_nargs != rproto_nargs) 4651 return QualType(); 4652 4653 // Variadic and non-variadic functions aren't compatible 4654 if (lproto->isVariadic() != rproto->isVariadic()) 4655 return QualType(); 4656 4657 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4658 return QualType(); 4659 4660 // Check argument compatibility 4661 llvm::SmallVector<QualType, 10> types; 4662 for (unsigned i = 0; i < lproto_nargs; i++) { 4663 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4664 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4665 QualType argtype = mergeTypes(largtype, rargtype, OfBlockPointer, 4666 Unqualified); 4667 if (argtype.isNull()) return QualType(); 4668 4669 if (Unqualified) 4670 argtype = argtype.getUnqualifiedType(); 4671 4672 types.push_back(argtype); 4673 if (Unqualified) { 4674 largtype = largtype.getUnqualifiedType(); 4675 rargtype = rargtype.getUnqualifiedType(); 4676 } 4677 4678 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4679 allLTypes = false; 4680 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4681 allRTypes = false; 4682 } 4683 if (allLTypes) return lhs; 4684 if (allRTypes) return rhs; 4685 return getFunctionType(retType, types.begin(), types.size(), 4686 lproto->isVariadic(), lproto->getTypeQuals(), 4687 false, false, 0, 0, 4688 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4689 } 4690 4691 if (lproto) allRTypes = false; 4692 if (rproto) allLTypes = false; 4693 4694 const FunctionProtoType *proto = lproto ? lproto : rproto; 4695 if (proto) { 4696 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4697 if (proto->isVariadic()) return QualType(); 4698 // Check that the types are compatible with the types that 4699 // would result from default argument promotions (C99 6.7.5.3p15). 4700 // The only types actually affected are promotable integer 4701 // types and floats, which would be passed as a different 4702 // type depending on whether the prototype is visible. 4703 unsigned proto_nargs = proto->getNumArgs(); 4704 for (unsigned i = 0; i < proto_nargs; ++i) { 4705 QualType argTy = proto->getArgType(i); 4706 4707 // Look at the promotion type of enum types, since that is the type used 4708 // to pass enum values. 4709 if (const EnumType *Enum = argTy->getAs<EnumType>()) 4710 argTy = Enum->getDecl()->getPromotionType(); 4711 4712 if (argTy->isPromotableIntegerType() || 4713 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4714 return QualType(); 4715 } 4716 4717 if (allLTypes) return lhs; 4718 if (allRTypes) return rhs; 4719 return getFunctionType(retType, proto->arg_type_begin(), 4720 proto->getNumArgs(), proto->isVariadic(), 4721 proto->getTypeQuals(), 4722 false, false, 0, 0, 4723 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4724 } 4725 4726 if (allLTypes) return lhs; 4727 if (allRTypes) return rhs; 4728 FunctionType::ExtInfo Info(NoReturn, RegParm, lcc); 4729 return getFunctionNoProtoType(retType, Info); 4730} 4731 4732QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 4733 bool OfBlockPointer, 4734 bool Unqualified) { 4735 // C++ [expr]: If an expression initially has the type "reference to T", the 4736 // type is adjusted to "T" prior to any further analysis, the expression 4737 // designates the object or function denoted by the reference, and the 4738 // expression is an lvalue unless the reference is an rvalue reference and 4739 // the expression is a function call (possibly inside parentheses). 4740 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 4741 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 4742 4743 if (Unqualified) { 4744 LHS = LHS.getUnqualifiedType(); 4745 RHS = RHS.getUnqualifiedType(); 4746 } 4747 4748 QualType LHSCan = getCanonicalType(LHS), 4749 RHSCan = getCanonicalType(RHS); 4750 4751 // If two types are identical, they are compatible. 4752 if (LHSCan == RHSCan) 4753 return LHS; 4754 4755 // If the qualifiers are different, the types aren't compatible... mostly. 4756 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4757 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4758 if (LQuals != RQuals) { 4759 // If any of these qualifiers are different, we have a type 4760 // mismatch. 4761 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4762 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4763 return QualType(); 4764 4765 // Exactly one GC qualifier difference is allowed: __strong is 4766 // okay if the other type has no GC qualifier but is an Objective 4767 // C object pointer (i.e. implicitly strong by default). We fix 4768 // this by pretending that the unqualified type was actually 4769 // qualified __strong. 4770 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4771 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4772 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4773 4774 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4775 return QualType(); 4776 4777 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4778 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4779 } 4780 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4781 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4782 } 4783 return QualType(); 4784 } 4785 4786 // Okay, qualifiers are equal. 4787 4788 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4789 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4790 4791 // We want to consider the two function types to be the same for these 4792 // comparisons, just force one to the other. 4793 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 4794 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 4795 4796 // Same as above for arrays 4797 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 4798 LHSClass = Type::ConstantArray; 4799 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 4800 RHSClass = Type::ConstantArray; 4801 4802 // ObjCInterfaces are just specialized ObjCObjects. 4803 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 4804 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 4805 4806 // Canonicalize ExtVector -> Vector. 4807 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 4808 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 4809 4810 // If the canonical type classes don't match. 4811 if (LHSClass != RHSClass) { 4812 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 4813 // a signed integer type, or an unsigned integer type. 4814 // Compatibility is based on the underlying type, not the promotion 4815 // type. 4816 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 4817 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 4818 return RHS; 4819 } 4820 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 4821 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 4822 return LHS; 4823 } 4824 4825 return QualType(); 4826 } 4827 4828 // The canonical type classes match. 4829 switch (LHSClass) { 4830#define TYPE(Class, Base) 4831#define ABSTRACT_TYPE(Class, Base) 4832#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 4833#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4834#define DEPENDENT_TYPE(Class, Base) case Type::Class: 4835#include "clang/AST/TypeNodes.def" 4836 assert(false && "Non-canonical and dependent types shouldn't get here"); 4837 return QualType(); 4838 4839 case Type::LValueReference: 4840 case Type::RValueReference: 4841 case Type::MemberPointer: 4842 assert(false && "C++ should never be in mergeTypes"); 4843 return QualType(); 4844 4845 case Type::ObjCInterface: 4846 case Type::IncompleteArray: 4847 case Type::VariableArray: 4848 case Type::FunctionProto: 4849 case Type::ExtVector: 4850 assert(false && "Types are eliminated above"); 4851 return QualType(); 4852 4853 case Type::Pointer: 4854 { 4855 // Merge two pointer types, while trying to preserve typedef info 4856 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 4857 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 4858 if (Unqualified) { 4859 LHSPointee = LHSPointee.getUnqualifiedType(); 4860 RHSPointee = RHSPointee.getUnqualifiedType(); 4861 } 4862 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, false, 4863 Unqualified); 4864 if (ResultType.isNull()) return QualType(); 4865 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4866 return LHS; 4867 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4868 return RHS; 4869 return getPointerType(ResultType); 4870 } 4871 case Type::BlockPointer: 4872 { 4873 // Merge two block pointer types, while trying to preserve typedef info 4874 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 4875 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 4876 if (Unqualified) { 4877 LHSPointee = LHSPointee.getUnqualifiedType(); 4878 RHSPointee = RHSPointee.getUnqualifiedType(); 4879 } 4880 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer, 4881 Unqualified); 4882 if (ResultType.isNull()) return QualType(); 4883 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4884 return LHS; 4885 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4886 return RHS; 4887 return getBlockPointerType(ResultType); 4888 } 4889 case Type::ConstantArray: 4890 { 4891 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 4892 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 4893 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 4894 return QualType(); 4895 4896 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 4897 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 4898 if (Unqualified) { 4899 LHSElem = LHSElem.getUnqualifiedType(); 4900 RHSElem = RHSElem.getUnqualifiedType(); 4901 } 4902 4903 QualType ResultType = mergeTypes(LHSElem, RHSElem, false, Unqualified); 4904 if (ResultType.isNull()) return QualType(); 4905 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4906 return LHS; 4907 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4908 return RHS; 4909 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 4910 ArrayType::ArraySizeModifier(), 0); 4911 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 4912 ArrayType::ArraySizeModifier(), 0); 4913 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 4914 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 4915 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4916 return LHS; 4917 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4918 return RHS; 4919 if (LVAT) { 4920 // FIXME: This isn't correct! But tricky to implement because 4921 // the array's size has to be the size of LHS, but the type 4922 // has to be different. 4923 return LHS; 4924 } 4925 if (RVAT) { 4926 // FIXME: This isn't correct! But tricky to implement because 4927 // the array's size has to be the size of RHS, but the type 4928 // has to be different. 4929 return RHS; 4930 } 4931 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 4932 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 4933 return getIncompleteArrayType(ResultType, 4934 ArrayType::ArraySizeModifier(), 0); 4935 } 4936 case Type::FunctionNoProto: 4937 return mergeFunctionTypes(LHS, RHS, OfBlockPointer, Unqualified); 4938 case Type::Record: 4939 case Type::Enum: 4940 return QualType(); 4941 case Type::Builtin: 4942 // Only exactly equal builtin types are compatible, which is tested above. 4943 return QualType(); 4944 case Type::Complex: 4945 // Distinct complex types are incompatible. 4946 return QualType(); 4947 case Type::Vector: 4948 // FIXME: The merged type should be an ExtVector! 4949 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 4950 RHSCan->getAs<VectorType>())) 4951 return LHS; 4952 return QualType(); 4953 case Type::ObjCObject: { 4954 // Check if the types are assignment compatible. 4955 // FIXME: This should be type compatibility, e.g. whether 4956 // "LHS x; RHS x;" at global scope is legal. 4957 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 4958 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 4959 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 4960 return LHS; 4961 4962 return QualType(); 4963 } 4964 case Type::ObjCObjectPointer: { 4965 if (OfBlockPointer) { 4966 if (canAssignObjCInterfacesInBlockPointer( 4967 LHS->getAs<ObjCObjectPointerType>(), 4968 RHS->getAs<ObjCObjectPointerType>())) 4969 return LHS; 4970 return QualType(); 4971 } 4972 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 4973 RHS->getAs<ObjCObjectPointerType>())) 4974 return LHS; 4975 4976 return QualType(); 4977 } 4978 } 4979 4980 return QualType(); 4981} 4982 4983/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 4984/// 'RHS' attributes and returns the merged version; including for function 4985/// return types. 4986QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 4987 QualType LHSCan = getCanonicalType(LHS), 4988 RHSCan = getCanonicalType(RHS); 4989 // If two types are identical, they are compatible. 4990 if (LHSCan == RHSCan) 4991 return LHS; 4992 if (RHSCan->isFunctionType()) { 4993 if (!LHSCan->isFunctionType()) 4994 return QualType(); 4995 QualType OldReturnType = 4996 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 4997 QualType NewReturnType = 4998 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 4999 QualType ResReturnType = 5000 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 5001 if (ResReturnType.isNull()) 5002 return QualType(); 5003 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 5004 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 5005 // In either case, use OldReturnType to build the new function type. 5006 const FunctionType *F = LHS->getAs<FunctionType>(); 5007 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 5008 FunctionType::ExtInfo Info = getFunctionExtInfo(LHS); 5009 QualType ResultType 5010 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 5011 FPT->getNumArgs(), FPT->isVariadic(), 5012 FPT->getTypeQuals(), 5013 FPT->hasExceptionSpec(), 5014 FPT->hasAnyExceptionSpec(), 5015 FPT->getNumExceptions(), 5016 FPT->exception_begin(), 5017 Info); 5018 return ResultType; 5019 } 5020 } 5021 return QualType(); 5022 } 5023 5024 // If the qualifiers are different, the types can still be merged. 5025 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5026 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5027 if (LQuals != RQuals) { 5028 // If any of these qualifiers are different, we have a type mismatch. 5029 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5030 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5031 return QualType(); 5032 5033 // Exactly one GC qualifier difference is allowed: __strong is 5034 // okay if the other type has no GC qualifier but is an Objective 5035 // C object pointer (i.e. implicitly strong by default). We fix 5036 // this by pretending that the unqualified type was actually 5037 // qualified __strong. 5038 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5039 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5040 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5041 5042 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5043 return QualType(); 5044 5045 if (GC_L == Qualifiers::Strong) 5046 return LHS; 5047 if (GC_R == Qualifiers::Strong) 5048 return RHS; 5049 return QualType(); 5050 } 5051 5052 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 5053 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5054 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5055 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 5056 if (ResQT == LHSBaseQT) 5057 return LHS; 5058 if (ResQT == RHSBaseQT) 5059 return RHS; 5060 } 5061 return QualType(); 5062} 5063 5064//===----------------------------------------------------------------------===// 5065// Integer Predicates 5066//===----------------------------------------------------------------------===// 5067 5068unsigned ASTContext::getIntWidth(QualType T) { 5069 if (T->isBooleanType()) 5070 return 1; 5071 if (EnumType *ET = dyn_cast<EnumType>(T)) 5072 T = ET->getDecl()->getIntegerType(); 5073 // For builtin types, just use the standard type sizing method 5074 return (unsigned)getTypeSize(T); 5075} 5076 5077QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 5078 assert(T->hasSignedIntegerRepresentation() && "Unexpected type"); 5079 5080 // Turn <4 x signed int> -> <4 x unsigned int> 5081 if (const VectorType *VTy = T->getAs<VectorType>()) 5082 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 5083 VTy->getNumElements(), VTy->getAltiVecSpecific()); 5084 5085 // For enums, we return the unsigned version of the base type. 5086 if (const EnumType *ETy = T->getAs<EnumType>()) 5087 T = ETy->getDecl()->getIntegerType(); 5088 5089 const BuiltinType *BTy = T->getAs<BuiltinType>(); 5090 assert(BTy && "Unexpected signed integer type"); 5091 switch (BTy->getKind()) { 5092 case BuiltinType::Char_S: 5093 case BuiltinType::SChar: 5094 return UnsignedCharTy; 5095 case BuiltinType::Short: 5096 return UnsignedShortTy; 5097 case BuiltinType::Int: 5098 return UnsignedIntTy; 5099 case BuiltinType::Long: 5100 return UnsignedLongTy; 5101 case BuiltinType::LongLong: 5102 return UnsignedLongLongTy; 5103 case BuiltinType::Int128: 5104 return UnsignedInt128Ty; 5105 default: 5106 assert(0 && "Unexpected signed integer type"); 5107 return QualType(); 5108 } 5109} 5110 5111ExternalASTSource::~ExternalASTSource() { } 5112 5113void ExternalASTSource::PrintStats() { } 5114 5115 5116//===----------------------------------------------------------------------===// 5117// Builtin Type Computation 5118//===----------------------------------------------------------------------===// 5119 5120/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 5121/// pointer over the consumed characters. This returns the resultant type. 5122static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 5123 ASTContext::GetBuiltinTypeError &Error, 5124 bool AllowTypeModifiers = true) { 5125 // Modifiers. 5126 int HowLong = 0; 5127 bool Signed = false, Unsigned = false; 5128 5129 // Read the modifiers first. 5130 bool Done = false; 5131 while (!Done) { 5132 switch (*Str++) { 5133 default: Done = true; --Str; break; 5134 case 'S': 5135 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 5136 assert(!Signed && "Can't use 'S' modifier multiple times!"); 5137 Signed = true; 5138 break; 5139 case 'U': 5140 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 5141 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 5142 Unsigned = true; 5143 break; 5144 case 'L': 5145 assert(HowLong <= 2 && "Can't have LLLL modifier"); 5146 ++HowLong; 5147 break; 5148 } 5149 } 5150 5151 QualType Type; 5152 5153 // Read the base type. 5154 switch (*Str++) { 5155 default: assert(0 && "Unknown builtin type letter!"); 5156 case 'v': 5157 assert(HowLong == 0 && !Signed && !Unsigned && 5158 "Bad modifiers used with 'v'!"); 5159 Type = Context.VoidTy; 5160 break; 5161 case 'f': 5162 assert(HowLong == 0 && !Signed && !Unsigned && 5163 "Bad modifiers used with 'f'!"); 5164 Type = Context.FloatTy; 5165 break; 5166 case 'd': 5167 assert(HowLong < 2 && !Signed && !Unsigned && 5168 "Bad modifiers used with 'd'!"); 5169 if (HowLong) 5170 Type = Context.LongDoubleTy; 5171 else 5172 Type = Context.DoubleTy; 5173 break; 5174 case 's': 5175 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 5176 if (Unsigned) 5177 Type = Context.UnsignedShortTy; 5178 else 5179 Type = Context.ShortTy; 5180 break; 5181 case 'i': 5182 if (HowLong == 3) 5183 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 5184 else if (HowLong == 2) 5185 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 5186 else if (HowLong == 1) 5187 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 5188 else 5189 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 5190 break; 5191 case 'c': 5192 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 5193 if (Signed) 5194 Type = Context.SignedCharTy; 5195 else if (Unsigned) 5196 Type = Context.UnsignedCharTy; 5197 else 5198 Type = Context.CharTy; 5199 break; 5200 case 'b': // boolean 5201 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 5202 Type = Context.BoolTy; 5203 break; 5204 case 'z': // size_t. 5205 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 5206 Type = Context.getSizeType(); 5207 break; 5208 case 'F': 5209 Type = Context.getCFConstantStringType(); 5210 break; 5211 case 'a': 5212 Type = Context.getBuiltinVaListType(); 5213 assert(!Type.isNull() && "builtin va list type not initialized!"); 5214 break; 5215 case 'A': 5216 // This is a "reference" to a va_list; however, what exactly 5217 // this means depends on how va_list is defined. There are two 5218 // different kinds of va_list: ones passed by value, and ones 5219 // passed by reference. An example of a by-value va_list is 5220 // x86, where va_list is a char*. An example of by-ref va_list 5221 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 5222 // we want this argument to be a char*&; for x86-64, we want 5223 // it to be a __va_list_tag*. 5224 Type = Context.getBuiltinVaListType(); 5225 assert(!Type.isNull() && "builtin va list type not initialized!"); 5226 if (Type->isArrayType()) { 5227 Type = Context.getArrayDecayedType(Type); 5228 } else { 5229 Type = Context.getLValueReferenceType(Type); 5230 } 5231 break; 5232 case 'V': { 5233 char *End; 5234 unsigned NumElements = strtoul(Str, &End, 10); 5235 assert(End != Str && "Missing vector size"); 5236 5237 Str = End; 5238 5239 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 5240 // FIXME: Don't know what to do about AltiVec. 5241 Type = Context.getVectorType(ElementType, NumElements, 5242 VectorType::NotAltiVec); 5243 break; 5244 } 5245 case 'X': { 5246 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 5247 Type = Context.getComplexType(ElementType); 5248 break; 5249 } 5250 case 'P': 5251 Type = Context.getFILEType(); 5252 if (Type.isNull()) { 5253 Error = ASTContext::GE_Missing_stdio; 5254 return QualType(); 5255 } 5256 break; 5257 case 'J': 5258 if (Signed) 5259 Type = Context.getsigjmp_bufType(); 5260 else 5261 Type = Context.getjmp_bufType(); 5262 5263 if (Type.isNull()) { 5264 Error = ASTContext::GE_Missing_setjmp; 5265 return QualType(); 5266 } 5267 break; 5268 } 5269 5270 if (!AllowTypeModifiers) 5271 return Type; 5272 5273 Done = false; 5274 while (!Done) { 5275 switch (char c = *Str++) { 5276 default: Done = true; --Str; break; 5277 case '*': 5278 case '&': 5279 { 5280 // Both pointers and references can have their pointee types 5281 // qualified with an address space. 5282 char *End; 5283 unsigned AddrSpace = strtoul(Str, &End, 10); 5284 if (End != Str && AddrSpace != 0) { 5285 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 5286 Str = End; 5287 } 5288 } 5289 if (c == '*') 5290 Type = Context.getPointerType(Type); 5291 else 5292 Type = Context.getLValueReferenceType(Type); 5293 break; 5294 // FIXME: There's no way to have a built-in with an rvalue ref arg. 5295 case 'C': 5296 Type = Type.withConst(); 5297 break; 5298 case 'D': 5299 Type = Context.getVolatileType(Type); 5300 break; 5301 } 5302 } 5303 5304 return Type; 5305} 5306 5307/// GetBuiltinType - Return the type for the specified builtin. 5308QualType ASTContext::GetBuiltinType(unsigned id, 5309 GetBuiltinTypeError &Error) { 5310 const char *TypeStr = BuiltinInfo.GetTypeString(id); 5311 5312 llvm::SmallVector<QualType, 8> ArgTypes; 5313 5314 Error = GE_None; 5315 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 5316 if (Error != GE_None) 5317 return QualType(); 5318 while (TypeStr[0] && TypeStr[0] != '.') { 5319 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 5320 if (Error != GE_None) 5321 return QualType(); 5322 5323 // Do array -> pointer decay. The builtin should use the decayed type. 5324 if (Ty->isArrayType()) 5325 Ty = getArrayDecayedType(Ty); 5326 5327 ArgTypes.push_back(Ty); 5328 } 5329 5330 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 5331 "'.' should only occur at end of builtin type list!"); 5332 5333 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 5334 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 5335 return getFunctionNoProtoType(ResType); 5336 5337 // FIXME: Should we create noreturn types? 5338 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 5339 TypeStr[0] == '.', 0, false, false, 0, 0, 5340 FunctionType::ExtInfo()); 5341} 5342 5343QualType 5344ASTContext::UsualArithmeticConversionsType(QualType lhs, QualType rhs) { 5345 // Perform the usual unary conversions. We do this early so that 5346 // integral promotions to "int" can allow us to exit early, in the 5347 // lhs == rhs check. Also, for conversion purposes, we ignore any 5348 // qualifiers. For example, "const float" and "float" are 5349 // equivalent. 5350 if (lhs->isPromotableIntegerType()) 5351 lhs = getPromotedIntegerType(lhs); 5352 else 5353 lhs = lhs.getUnqualifiedType(); 5354 if (rhs->isPromotableIntegerType()) 5355 rhs = getPromotedIntegerType(rhs); 5356 else 5357 rhs = rhs.getUnqualifiedType(); 5358 5359 // If both types are identical, no conversion is needed. 5360 if (lhs == rhs) 5361 return lhs; 5362 5363 // If either side is a non-arithmetic type (e.g. a pointer), we are done. 5364 // The caller can deal with this (e.g. pointer + int). 5365 if (!lhs->isArithmeticType() || !rhs->isArithmeticType()) 5366 return lhs; 5367 5368 // At this point, we have two different arithmetic types. 5369 5370 // Handle complex types first (C99 6.3.1.8p1). 5371 if (lhs->isComplexType() || rhs->isComplexType()) { 5372 // if we have an integer operand, the result is the complex type. 5373 if (rhs->isIntegerType() || rhs->isComplexIntegerType()) { 5374 // convert the rhs to the lhs complex type. 5375 return lhs; 5376 } 5377 if (lhs->isIntegerType() || lhs->isComplexIntegerType()) { 5378 // convert the lhs to the rhs complex type. 5379 return rhs; 5380 } 5381 // This handles complex/complex, complex/float, or float/complex. 5382 // When both operands are complex, the shorter operand is converted to the 5383 // type of the longer, and that is the type of the result. This corresponds 5384 // to what is done when combining two real floating-point operands. 5385 // The fun begins when size promotion occur across type domains. 5386 // From H&S 6.3.4: When one operand is complex and the other is a real 5387 // floating-point type, the less precise type is converted, within it's 5388 // real or complex domain, to the precision of the other type. For example, 5389 // when combining a "long double" with a "double _Complex", the 5390 // "double _Complex" is promoted to "long double _Complex". 5391 int result = getFloatingTypeOrder(lhs, rhs); 5392 5393 if (result > 0) { // The left side is bigger, convert rhs. 5394 rhs = getFloatingTypeOfSizeWithinDomain(lhs, rhs); 5395 } else if (result < 0) { // The right side is bigger, convert lhs. 5396 lhs = getFloatingTypeOfSizeWithinDomain(rhs, lhs); 5397 } 5398 // At this point, lhs and rhs have the same rank/size. Now, make sure the 5399 // domains match. This is a requirement for our implementation, C99 5400 // does not require this promotion. 5401 if (lhs != rhs) { // Domains don't match, we have complex/float mix. 5402 if (lhs->isRealFloatingType()) { // handle "double, _Complex double". 5403 return rhs; 5404 } else { // handle "_Complex double, double". 5405 return lhs; 5406 } 5407 } 5408 return lhs; // The domain/size match exactly. 5409 } 5410 // Now handle "real" floating types (i.e. float, double, long double). 5411 if (lhs->isRealFloatingType() || rhs->isRealFloatingType()) { 5412 // if we have an integer operand, the result is the real floating type. 5413 if (rhs->isIntegerType()) { 5414 // convert rhs to the lhs floating point type. 5415 return lhs; 5416 } 5417 if (rhs->isComplexIntegerType()) { 5418 // convert rhs to the complex floating point type. 5419 return getComplexType(lhs); 5420 } 5421 if (lhs->isIntegerType()) { 5422 // convert lhs to the rhs floating point type. 5423 return rhs; 5424 } 5425 if (lhs->isComplexIntegerType()) { 5426 // convert lhs to the complex floating point type. 5427 return getComplexType(rhs); 5428 } 5429 // We have two real floating types, float/complex combos were handled above. 5430 // Convert the smaller operand to the bigger result. 5431 int result = getFloatingTypeOrder(lhs, rhs); 5432 if (result > 0) // convert the rhs 5433 return lhs; 5434 assert(result < 0 && "illegal float comparison"); 5435 return rhs; // convert the lhs 5436 } 5437 if (lhs->isComplexIntegerType() || rhs->isComplexIntegerType()) { 5438 // Handle GCC complex int extension. 5439 const ComplexType *lhsComplexInt = lhs->getAsComplexIntegerType(); 5440 const ComplexType *rhsComplexInt = rhs->getAsComplexIntegerType(); 5441 5442 if (lhsComplexInt && rhsComplexInt) { 5443 if (getIntegerTypeOrder(lhsComplexInt->getElementType(), 5444 rhsComplexInt->getElementType()) >= 0) 5445 return lhs; // convert the rhs 5446 return rhs; 5447 } else if (lhsComplexInt && rhs->isIntegerType()) { 5448 // convert the rhs to the lhs complex type. 5449 return lhs; 5450 } else if (rhsComplexInt && lhs->isIntegerType()) { 5451 // convert the lhs to the rhs complex type. 5452 return rhs; 5453 } 5454 } 5455 // Finally, we have two differing integer types. 5456 // The rules for this case are in C99 6.3.1.8 5457 int compare = getIntegerTypeOrder(lhs, rhs); 5458 bool lhsSigned = lhs->hasSignedIntegerRepresentation(), 5459 rhsSigned = rhs->hasSignedIntegerRepresentation(); 5460 QualType destType; 5461 if (lhsSigned == rhsSigned) { 5462 // Same signedness; use the higher-ranked type 5463 destType = compare >= 0 ? lhs : rhs; 5464 } else if (compare != (lhsSigned ? 1 : -1)) { 5465 // The unsigned type has greater than or equal rank to the 5466 // signed type, so use the unsigned type 5467 destType = lhsSigned ? rhs : lhs; 5468 } else if (getIntWidth(lhs) != getIntWidth(rhs)) { 5469 // The two types are different widths; if we are here, that 5470 // means the signed type is larger than the unsigned type, so 5471 // use the signed type. 5472 destType = lhsSigned ? lhs : rhs; 5473 } else { 5474 // The signed type is higher-ranked than the unsigned type, 5475 // but isn't actually any bigger (like unsigned int and long 5476 // on most 32-bit systems). Use the unsigned type corresponding 5477 // to the signed type. 5478 destType = getCorrespondingUnsignedType(lhsSigned ? lhs : rhs); 5479 } 5480 return destType; 5481} 5482 5483GVALinkage ASTContext::GetGVALinkageForFunction(const FunctionDecl *FD) { 5484 GVALinkage External = GVA_StrongExternal; 5485 5486 Linkage L = FD->getLinkage(); 5487 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 5488 FD->getType()->getLinkage() == UniqueExternalLinkage) 5489 L = UniqueExternalLinkage; 5490 5491 switch (L) { 5492 case NoLinkage: 5493 case InternalLinkage: 5494 case UniqueExternalLinkage: 5495 return GVA_Internal; 5496 5497 case ExternalLinkage: 5498 switch (FD->getTemplateSpecializationKind()) { 5499 case TSK_Undeclared: 5500 case TSK_ExplicitSpecialization: 5501 External = GVA_StrongExternal; 5502 break; 5503 5504 case TSK_ExplicitInstantiationDefinition: 5505 return GVA_ExplicitTemplateInstantiation; 5506 5507 case TSK_ExplicitInstantiationDeclaration: 5508 case TSK_ImplicitInstantiation: 5509 External = GVA_TemplateInstantiation; 5510 break; 5511 } 5512 } 5513 5514 if (!FD->isInlined()) 5515 return External; 5516 5517 if (!getLangOptions().CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 5518 // GNU or C99 inline semantics. Determine whether this symbol should be 5519 // externally visible. 5520 if (FD->isInlineDefinitionExternallyVisible()) 5521 return External; 5522 5523 // C99 inline semantics, where the symbol is not externally visible. 5524 return GVA_C99Inline; 5525 } 5526 5527 // C++0x [temp.explicit]p9: 5528 // [ Note: The intent is that an inline function that is the subject of 5529 // an explicit instantiation declaration will still be implicitly 5530 // instantiated when used so that the body can be considered for 5531 // inlining, but that no out-of-line copy of the inline function would be 5532 // generated in the translation unit. -- end note ] 5533 if (FD->getTemplateSpecializationKind() 5534 == TSK_ExplicitInstantiationDeclaration) 5535 return GVA_C99Inline; 5536 5537 return GVA_CXXInline; 5538} 5539 5540GVALinkage ASTContext::GetGVALinkageForVariable(const VarDecl *VD) { 5541 // If this is a static data member, compute the kind of template 5542 // specialization. Otherwise, this variable is not part of a 5543 // template. 5544 TemplateSpecializationKind TSK = TSK_Undeclared; 5545 if (VD->isStaticDataMember()) 5546 TSK = VD->getTemplateSpecializationKind(); 5547 5548 Linkage L = VD->getLinkage(); 5549 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 5550 VD->getType()->getLinkage() == UniqueExternalLinkage) 5551 L = UniqueExternalLinkage; 5552 5553 switch (L) { 5554 case NoLinkage: 5555 case InternalLinkage: 5556 case UniqueExternalLinkage: 5557 return GVA_Internal; 5558 5559 case ExternalLinkage: 5560 switch (TSK) { 5561 case TSK_Undeclared: 5562 case TSK_ExplicitSpecialization: 5563 return GVA_StrongExternal; 5564 5565 case TSK_ExplicitInstantiationDeclaration: 5566 llvm_unreachable("Variable should not be instantiated"); 5567 // Fall through to treat this like any other instantiation. 5568 5569 case TSK_ExplicitInstantiationDefinition: 5570 return GVA_ExplicitTemplateInstantiation; 5571 5572 case TSK_ImplicitInstantiation: 5573 return GVA_TemplateInstantiation; 5574 } 5575 } 5576 5577 return GVA_StrongExternal; 5578} 5579 5580bool ASTContext::DeclMustBeEmitted(const Decl *D) { 5581 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 5582 if (!VD->isFileVarDecl()) 5583 return false; 5584 } else if (!isa<FunctionDecl>(D)) 5585 return false; 5586 5587 // Weak references don't produce any output by themselves. 5588 if (D->hasAttr<WeakRefAttr>()) 5589 return false; 5590 5591 // Aliases and used decls are required. 5592 if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>()) 5593 return true; 5594 5595 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 5596 // Forward declarations aren't required. 5597 if (!FD->isThisDeclarationADefinition()) 5598 return false; 5599 5600 // Constructors and destructors are required. 5601 if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>()) 5602 return true; 5603 5604 // The key function for a class is required. 5605 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 5606 const CXXRecordDecl *RD = MD->getParent(); 5607 if (MD->isOutOfLine() && RD->isDynamicClass()) { 5608 const CXXMethodDecl *KeyFunc = getKeyFunction(RD); 5609 if (KeyFunc && KeyFunc->getCanonicalDecl() == MD->getCanonicalDecl()) 5610 return true; 5611 } 5612 } 5613 5614 GVALinkage Linkage = GetGVALinkageForFunction(FD); 5615 5616 // static, static inline, always_inline, and extern inline functions can 5617 // always be deferred. Normal inline functions can be deferred in C99/C++. 5618 // Implicit template instantiations can also be deferred in C++. 5619 if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 5620 Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 5621 return false; 5622 return true; 5623 } 5624 5625 const VarDecl *VD = cast<VarDecl>(D); 5626 assert(VD->isFileVarDecl() && "Expected file scoped var"); 5627 5628 if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) 5629 return false; 5630 5631 // Structs that have non-trivial constructors or destructors are required. 5632 5633 // FIXME: Handle references. 5634 if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { 5635 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 5636 if (RD->hasDefinition() && 5637 (!RD->hasTrivialConstructor() || !RD->hasTrivialDestructor())) 5638 return true; 5639 } 5640 } 5641 5642 GVALinkage L = GetGVALinkageForVariable(VD); 5643 if (L == GVA_Internal || L == GVA_TemplateInstantiation) { 5644 if (!(VD->getInit() && VD->getInit()->HasSideEffects(*this))) 5645 return false; 5646 } 5647 5648 return true; 5649} 5650 5651CXXABI::~CXXABI() {} 5652