ASTContext.cpp revision 569c3166874324c24011f8ade6978421f0d39b3c
1//===--- ASTContext.cpp - Context to hold long-lived AST nodes ------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 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 32using namespace clang; 33 34unsigned ASTContext::NumImplicitDefaultConstructors; 35unsigned ASTContext::NumImplicitDefaultConstructorsDeclared; 36unsigned ASTContext::NumImplicitCopyConstructors; 37unsigned ASTContext::NumImplicitCopyConstructorsDeclared; 38unsigned ASTContext::NumImplicitCopyAssignmentOperators; 39unsigned ASTContext::NumImplicitCopyAssignmentOperatorsDeclared; 40unsigned ASTContext::NumImplicitDestructors; 41unsigned ASTContext::NumImplicitDestructorsDeclared; 42 43enum FloatingRank { 44 FloatRank, DoubleRank, LongDoubleRank 45}; 46 47void 48ASTContext::CanonicalTemplateTemplateParm::Profile(llvm::FoldingSetNodeID &ID, 49 TemplateTemplateParmDecl *Parm) { 50 ID.AddInteger(Parm->getDepth()); 51 ID.AddInteger(Parm->getPosition()); 52 // FIXME: Parameter pack 53 54 TemplateParameterList *Params = Parm->getTemplateParameters(); 55 ID.AddInteger(Params->size()); 56 for (TemplateParameterList::const_iterator P = Params->begin(), 57 PEnd = Params->end(); 58 P != PEnd; ++P) { 59 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) { 60 ID.AddInteger(0); 61 ID.AddBoolean(TTP->isParameterPack()); 62 continue; 63 } 64 65 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 66 ID.AddInteger(1); 67 // FIXME: Parameter pack 68 ID.AddPointer(NTTP->getType().getAsOpaquePtr()); 69 continue; 70 } 71 72 TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P); 73 ID.AddInteger(2); 74 Profile(ID, TTP); 75 } 76} 77 78TemplateTemplateParmDecl * 79ASTContext::getCanonicalTemplateTemplateParmDecl( 80 TemplateTemplateParmDecl *TTP) { 81 // Check if we already have a canonical template template parameter. 82 llvm::FoldingSetNodeID ID; 83 CanonicalTemplateTemplateParm::Profile(ID, TTP); 84 void *InsertPos = 0; 85 CanonicalTemplateTemplateParm *Canonical 86 = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 87 if (Canonical) 88 return Canonical->getParam(); 89 90 // Build a canonical template parameter list. 91 TemplateParameterList *Params = TTP->getTemplateParameters(); 92 llvm::SmallVector<NamedDecl *, 4> CanonParams; 93 CanonParams.reserve(Params->size()); 94 for (TemplateParameterList::const_iterator P = Params->begin(), 95 PEnd = Params->end(); 96 P != PEnd; ++P) { 97 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) 98 CanonParams.push_back( 99 TemplateTypeParmDecl::Create(*this, getTranslationUnitDecl(), 100 SourceLocation(), TTP->getDepth(), 101 TTP->getIndex(), 0, false, 102 TTP->isParameterPack())); 103 else if (NonTypeTemplateParmDecl *NTTP 104 = dyn_cast<NonTypeTemplateParmDecl>(*P)) 105 CanonParams.push_back( 106 NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 107 SourceLocation(), NTTP->getDepth(), 108 NTTP->getPosition(), 0, 109 getCanonicalType(NTTP->getType()), 110 0)); 111 else 112 CanonParams.push_back(getCanonicalTemplateTemplateParmDecl( 113 cast<TemplateTemplateParmDecl>(*P))); 114 } 115 116 TemplateTemplateParmDecl *CanonTTP 117 = TemplateTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 118 SourceLocation(), TTP->getDepth(), 119 TTP->getPosition(), 0, 120 TemplateParameterList::Create(*this, SourceLocation(), 121 SourceLocation(), 122 CanonParams.data(), 123 CanonParams.size(), 124 SourceLocation())); 125 126 // Get the new insert position for the node we care about. 127 Canonical = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 128 assert(Canonical == 0 && "Shouldn't be in the map!"); 129 (void)Canonical; 130 131 // Create the canonical template template parameter entry. 132 Canonical = new (*this) CanonicalTemplateTemplateParm(CanonTTP); 133 CanonTemplateTemplateParms.InsertNode(Canonical, InsertPos); 134 return CanonTTP; 135} 136 137ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 138 const TargetInfo &t, 139 IdentifierTable &idents, SelectorTable &sels, 140 Builtin::Context &builtins, 141 unsigned size_reserve) : 142 TemplateSpecializationTypes(this_()), 143 DependentTemplateSpecializationTypes(this_()), 144 GlobalNestedNameSpecifier(0), IsInt128Installed(false), 145 CFConstantStringTypeDecl(0), NSConstantStringTypeDecl(0), 146 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 147 sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 148 NullTypeSourceInfo(QualType()), 149 SourceMgr(SM), LangOpts(LOpts), Target(t), 150 Idents(idents), Selectors(sels), 151 BuiltinInfo(builtins), 152 DeclarationNames(*this), 153 ExternalSource(0), PrintingPolicy(LOpts), 154 LastSDM(0, 0), 155 UniqueBlockByRefTypeID(0), UniqueBlockParmTypeID(0) { 156 ObjCIdRedefinitionType = QualType(); 157 ObjCClassRedefinitionType = QualType(); 158 ObjCSelRedefinitionType = QualType(); 159 if (size_reserve > 0) Types.reserve(size_reserve); 160 TUDecl = TranslationUnitDecl::Create(*this); 161 InitBuiltinTypes(); 162} 163 164ASTContext::~ASTContext() { 165 // Release the DenseMaps associated with DeclContext objects. 166 // FIXME: Is this the ideal solution? 167 ReleaseDeclContextMaps(); 168 169 // Call all of the deallocation functions. 170 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 171 Deallocations[I].first(Deallocations[I].second); 172 173 // Release all of the memory associated with overridden C++ methods. 174 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 175 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 176 OM != OMEnd; ++OM) 177 OM->second.Destroy(); 178 179 // ASTRecordLayout objects in ASTRecordLayouts must always be destroyed 180 // because they can contain DenseMaps. 181 for (llvm::DenseMap<const ObjCContainerDecl*, 182 const ASTRecordLayout*>::iterator 183 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) 184 // Increment in loop to prevent using deallocated memory. 185 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 186 R->Destroy(*this); 187 188 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 189 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 190 // Increment in loop to prevent using deallocated memory. 191 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 192 R->Destroy(*this); 193 } 194 } 195 196void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 197 Deallocations.push_back(std::make_pair(Callback, Data)); 198} 199 200void 201ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 202 ExternalSource.reset(Source.take()); 203} 204 205void ASTContext::PrintStats() const { 206 fprintf(stderr, "*** AST Context Stats:\n"); 207 fprintf(stderr, " %d types total.\n", (int)Types.size()); 208 209 unsigned counts[] = { 210#define TYPE(Name, Parent) 0, 211#define ABSTRACT_TYPE(Name, Parent) 212#include "clang/AST/TypeNodes.def" 213 0 // Extra 214 }; 215 216 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 217 Type *T = Types[i]; 218 counts[(unsigned)T->getTypeClass()]++; 219 } 220 221 unsigned Idx = 0; 222 unsigned TotalBytes = 0; 223#define TYPE(Name, Parent) \ 224 if (counts[Idx]) \ 225 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 226 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 227 ++Idx; 228#define ABSTRACT_TYPE(Name, Parent) 229#include "clang/AST/TypeNodes.def" 230 231 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 232 233 // Implicit special member functions. 234 fprintf(stderr, " %u/%u implicit default constructors created\n", 235 NumImplicitDefaultConstructorsDeclared, 236 NumImplicitDefaultConstructors); 237 fprintf(stderr, " %u/%u implicit copy constructors created\n", 238 NumImplicitCopyConstructorsDeclared, 239 NumImplicitCopyConstructors); 240 fprintf(stderr, " %u/%u implicit copy assignment operators created\n", 241 NumImplicitCopyAssignmentOperatorsDeclared, 242 NumImplicitCopyAssignmentOperators); 243 fprintf(stderr, " %u/%u implicit destructors created\n", 244 NumImplicitDestructorsDeclared, NumImplicitDestructors); 245 246 if (ExternalSource.get()) { 247 fprintf(stderr, "\n"); 248 ExternalSource->PrintStats(); 249 } 250 251 BumpAlloc.PrintStats(); 252} 253 254 255void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 256 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 257 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 258 Types.push_back(Ty); 259} 260 261void ASTContext::InitBuiltinTypes() { 262 assert(VoidTy.isNull() && "Context reinitialized?"); 263 264 // C99 6.2.5p19. 265 InitBuiltinType(VoidTy, BuiltinType::Void); 266 267 // C99 6.2.5p2. 268 InitBuiltinType(BoolTy, BuiltinType::Bool); 269 // C99 6.2.5p3. 270 if (LangOpts.CharIsSigned) 271 InitBuiltinType(CharTy, BuiltinType::Char_S); 272 else 273 InitBuiltinType(CharTy, BuiltinType::Char_U); 274 // C99 6.2.5p4. 275 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 276 InitBuiltinType(ShortTy, BuiltinType::Short); 277 InitBuiltinType(IntTy, BuiltinType::Int); 278 InitBuiltinType(LongTy, BuiltinType::Long); 279 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 280 281 // C99 6.2.5p6. 282 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 283 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 284 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 285 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 286 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 287 288 // C99 6.2.5p10. 289 InitBuiltinType(FloatTy, BuiltinType::Float); 290 InitBuiltinType(DoubleTy, BuiltinType::Double); 291 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 292 293 // GNU extension, 128-bit integers. 294 InitBuiltinType(Int128Ty, BuiltinType::Int128); 295 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 296 297 if (LangOpts.CPlusPlus) // C++ 3.9.1p5 298 InitBuiltinType(WCharTy, BuiltinType::WChar); 299 else // C99 300 WCharTy = getFromTargetType(Target.getWCharType()); 301 302 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 303 InitBuiltinType(Char16Ty, BuiltinType::Char16); 304 else // C99 305 Char16Ty = getFromTargetType(Target.getChar16Type()); 306 307 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 308 InitBuiltinType(Char32Ty, BuiltinType::Char32); 309 else // C99 310 Char32Ty = getFromTargetType(Target.getChar32Type()); 311 312 // Placeholder type for functions. 313 InitBuiltinType(OverloadTy, BuiltinType::Overload); 314 315 // Placeholder type for type-dependent expressions whose type is 316 // completely unknown. No code should ever check a type against 317 // DependentTy and users should never see it; however, it is here to 318 // help diagnose failures to properly check for type-dependent 319 // expressions. 320 InitBuiltinType(DependentTy, BuiltinType::Dependent); 321 322 // Placeholder type for C++0x auto declarations whose real type has 323 // not yet been deduced. 324 InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 325 326 // C99 6.2.5p11. 327 FloatComplexTy = getComplexType(FloatTy); 328 DoubleComplexTy = getComplexType(DoubleTy); 329 LongDoubleComplexTy = getComplexType(LongDoubleTy); 330 331 BuiltinVaListType = QualType(); 332 333 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 334 ObjCIdTypedefType = QualType(); 335 ObjCClassTypedefType = QualType(); 336 ObjCSelTypedefType = QualType(); 337 338 // Builtin types for 'id', 'Class', and 'SEL'. 339 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 340 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 341 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 342 343 ObjCConstantStringType = QualType(); 344 345 // void * type 346 VoidPtrTy = getPointerType(VoidTy); 347 348 // nullptr type (C++0x 2.14.7) 349 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 350} 351 352MemberSpecializationInfo * 353ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 354 assert(Var->isStaticDataMember() && "Not a static data member"); 355 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 356 = InstantiatedFromStaticDataMember.find(Var); 357 if (Pos == InstantiatedFromStaticDataMember.end()) 358 return 0; 359 360 return Pos->second; 361} 362 363void 364ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 365 TemplateSpecializationKind TSK, 366 SourceLocation PointOfInstantiation) { 367 assert(Inst->isStaticDataMember() && "Not a static data member"); 368 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 369 assert(!InstantiatedFromStaticDataMember[Inst] && 370 "Already noted what static data member was instantiated from"); 371 InstantiatedFromStaticDataMember[Inst] 372 = new (*this) MemberSpecializationInfo(Tmpl, TSK, PointOfInstantiation); 373} 374 375NamedDecl * 376ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 377 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 378 = InstantiatedFromUsingDecl.find(UUD); 379 if (Pos == InstantiatedFromUsingDecl.end()) 380 return 0; 381 382 return Pos->second; 383} 384 385void 386ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 387 assert((isa<UsingDecl>(Pattern) || 388 isa<UnresolvedUsingValueDecl>(Pattern) || 389 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 390 "pattern decl is not a using decl"); 391 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 392 InstantiatedFromUsingDecl[Inst] = Pattern; 393} 394 395UsingShadowDecl * 396ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 397 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 398 = InstantiatedFromUsingShadowDecl.find(Inst); 399 if (Pos == InstantiatedFromUsingShadowDecl.end()) 400 return 0; 401 402 return Pos->second; 403} 404 405void 406ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 407 UsingShadowDecl *Pattern) { 408 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 409 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 410} 411 412FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 413 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 414 = InstantiatedFromUnnamedFieldDecl.find(Field); 415 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 416 return 0; 417 418 return Pos->second; 419} 420 421void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 422 FieldDecl *Tmpl) { 423 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 424 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 425 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 426 "Already noted what unnamed field was instantiated from"); 427 428 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 429} 430 431ASTContext::overridden_cxx_method_iterator 432ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 433 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 434 = OverriddenMethods.find(Method); 435 if (Pos == OverriddenMethods.end()) 436 return 0; 437 438 return Pos->second.begin(); 439} 440 441ASTContext::overridden_cxx_method_iterator 442ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 443 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 444 = OverriddenMethods.find(Method); 445 if (Pos == OverriddenMethods.end()) 446 return 0; 447 448 return Pos->second.end(); 449} 450 451unsigned 452ASTContext::overridden_methods_size(const CXXMethodDecl *Method) const { 453 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 454 = OverriddenMethods.find(Method); 455 if (Pos == OverriddenMethods.end()) 456 return 0; 457 458 return Pos->second.size(); 459} 460 461void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 462 const CXXMethodDecl *Overridden) { 463 OverriddenMethods[Method].push_back(Overridden); 464} 465 466namespace { 467 class BeforeInTranslationUnit 468 : std::binary_function<SourceRange, SourceRange, bool> { 469 SourceManager *SourceMgr; 470 471 public: 472 explicit BeforeInTranslationUnit(SourceManager *SM) : SourceMgr(SM) { } 473 474 bool operator()(SourceRange X, SourceRange Y) { 475 return SourceMgr->isBeforeInTranslationUnit(X.getBegin(), Y.getBegin()); 476 } 477 }; 478} 479 480//===----------------------------------------------------------------------===// 481// Type Sizing and Analysis 482//===----------------------------------------------------------------------===// 483 484/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 485/// scalar floating point type. 486const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 487 const BuiltinType *BT = T->getAs<BuiltinType>(); 488 assert(BT && "Not a floating point type!"); 489 switch (BT->getKind()) { 490 default: assert(0 && "Not a floating point type!"); 491 case BuiltinType::Float: return Target.getFloatFormat(); 492 case BuiltinType::Double: return Target.getDoubleFormat(); 493 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 494 } 495} 496 497/// getDeclAlign - Return a conservative estimate of the alignment of the 498/// specified decl. Note that bitfields do not have a valid alignment, so 499/// this method will assert on them. 500/// If @p RefAsPointee, references are treated like their underlying type 501/// (for alignof), else they're treated like pointers (for CodeGen). 502CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) { 503 unsigned Align = Target.getCharWidth(); 504 505 if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 506 Align = std::max(Align, AA->getMaxAlignment()); 507 508 if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 509 QualType T = VD->getType(); 510 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 511 if (RefAsPointee) 512 T = RT->getPointeeType(); 513 else 514 T = getPointerType(RT->getPointeeType()); 515 } 516 if (!T->isIncompleteType() && !T->isFunctionType()) { 517 unsigned MinWidth = Target.getLargeArrayMinWidth(); 518 unsigned ArrayAlign = Target.getLargeArrayAlign(); 519 if (isa<VariableArrayType>(T) && MinWidth != 0) 520 Align = std::max(Align, ArrayAlign); 521 if (ConstantArrayType *CT = dyn_cast<ConstantArrayType>(T)) { 522 unsigned Size = getTypeSize(CT); 523 if (MinWidth != 0 && MinWidth <= Size) 524 Align = std::max(Align, ArrayAlign); 525 } 526 // Incomplete or function types default to 1. 527 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 528 T = cast<ArrayType>(T)->getElementType(); 529 530 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 531 } 532 if (const FieldDecl *FD = dyn_cast<FieldDecl>(VD)) { 533 // In the case of a field in a packed struct, we want the minimum 534 // of the alignment of the field and the alignment of the struct. 535 Align = std::min(Align, 536 getPreferredTypeAlign(FD->getParent()->getTypeForDecl())); 537 } 538 } 539 540 return CharUnits::fromQuantity(Align / Target.getCharWidth()); 541} 542 543std::pair<CharUnits, CharUnits> 544ASTContext::getTypeInfoInChars(const Type *T) { 545 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 546 return std::make_pair(CharUnits::fromQuantity(Info.first / getCharWidth()), 547 CharUnits::fromQuantity(Info.second / getCharWidth())); 548} 549 550std::pair<CharUnits, CharUnits> 551ASTContext::getTypeInfoInChars(QualType T) { 552 return getTypeInfoInChars(T.getTypePtr()); 553} 554 555/// getTypeSize - Return the size of the specified type, in bits. This method 556/// does not work on incomplete types. 557/// 558/// FIXME: Pointers into different addr spaces could have different sizes and 559/// alignment requirements: getPointerInfo should take an AddrSpace, this 560/// should take a QualType, &c. 561std::pair<uint64_t, unsigned> 562ASTContext::getTypeInfo(const Type *T) { 563 uint64_t Width=0; 564 unsigned Align=8; 565 switch (T->getTypeClass()) { 566#define TYPE(Class, Base) 567#define ABSTRACT_TYPE(Class, Base) 568#define NON_CANONICAL_TYPE(Class, Base) 569#define DEPENDENT_TYPE(Class, Base) case Type::Class: 570#include "clang/AST/TypeNodes.def" 571 assert(false && "Should not see dependent types"); 572 break; 573 574 case Type::FunctionNoProto: 575 case Type::FunctionProto: 576 // GCC extension: alignof(function) = 32 bits 577 Width = 0; 578 Align = 32; 579 break; 580 581 case Type::IncompleteArray: 582 case Type::VariableArray: 583 Width = 0; 584 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 585 break; 586 587 case Type::ConstantArray: { 588 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 589 590 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 591 Width = EltInfo.first*CAT->getSize().getZExtValue(); 592 Align = EltInfo.second; 593 break; 594 } 595 case Type::ExtVector: 596 case Type::Vector: { 597 const VectorType *VT = cast<VectorType>(T); 598 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 599 Width = EltInfo.first*VT->getNumElements(); 600 Align = Width; 601 // If the alignment is not a power of 2, round up to the next power of 2. 602 // This happens for non-power-of-2 length vectors. 603 if (Align & (Align-1)) { 604 Align = llvm::NextPowerOf2(Align); 605 Width = llvm::RoundUpToAlignment(Width, Align); 606 } 607 break; 608 } 609 610 case Type::Builtin: 611 switch (cast<BuiltinType>(T)->getKind()) { 612 default: assert(0 && "Unknown builtin type!"); 613 case BuiltinType::Void: 614 // GCC extension: alignof(void) = 8 bits. 615 Width = 0; 616 Align = 8; 617 break; 618 619 case BuiltinType::Bool: 620 Width = Target.getBoolWidth(); 621 Align = Target.getBoolAlign(); 622 break; 623 case BuiltinType::Char_S: 624 case BuiltinType::Char_U: 625 case BuiltinType::UChar: 626 case BuiltinType::SChar: 627 Width = Target.getCharWidth(); 628 Align = Target.getCharAlign(); 629 break; 630 case BuiltinType::WChar: 631 Width = Target.getWCharWidth(); 632 Align = Target.getWCharAlign(); 633 break; 634 case BuiltinType::Char16: 635 Width = Target.getChar16Width(); 636 Align = Target.getChar16Align(); 637 break; 638 case BuiltinType::Char32: 639 Width = Target.getChar32Width(); 640 Align = Target.getChar32Align(); 641 break; 642 case BuiltinType::UShort: 643 case BuiltinType::Short: 644 Width = Target.getShortWidth(); 645 Align = Target.getShortAlign(); 646 break; 647 case BuiltinType::UInt: 648 case BuiltinType::Int: 649 Width = Target.getIntWidth(); 650 Align = Target.getIntAlign(); 651 break; 652 case BuiltinType::ULong: 653 case BuiltinType::Long: 654 Width = Target.getLongWidth(); 655 Align = Target.getLongAlign(); 656 break; 657 case BuiltinType::ULongLong: 658 case BuiltinType::LongLong: 659 Width = Target.getLongLongWidth(); 660 Align = Target.getLongLongAlign(); 661 break; 662 case BuiltinType::Int128: 663 case BuiltinType::UInt128: 664 Width = 128; 665 Align = 128; // int128_t is 128-bit aligned on all targets. 666 break; 667 case BuiltinType::Float: 668 Width = Target.getFloatWidth(); 669 Align = Target.getFloatAlign(); 670 break; 671 case BuiltinType::Double: 672 Width = Target.getDoubleWidth(); 673 Align = Target.getDoubleAlign(); 674 break; 675 case BuiltinType::LongDouble: 676 Width = Target.getLongDoubleWidth(); 677 Align = Target.getLongDoubleAlign(); 678 break; 679 case BuiltinType::NullPtr: 680 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 681 Align = Target.getPointerAlign(0); // == sizeof(void*) 682 break; 683 case BuiltinType::ObjCId: 684 case BuiltinType::ObjCClass: 685 case BuiltinType::ObjCSel: 686 Width = Target.getPointerWidth(0); 687 Align = Target.getPointerAlign(0); 688 break; 689 } 690 break; 691 case Type::ObjCObjectPointer: 692 Width = Target.getPointerWidth(0); 693 Align = Target.getPointerAlign(0); 694 break; 695 case Type::BlockPointer: { 696 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 697 Width = Target.getPointerWidth(AS); 698 Align = Target.getPointerAlign(AS); 699 break; 700 } 701 case Type::LValueReference: 702 case Type::RValueReference: { 703 // alignof and sizeof should never enter this code path here, so we go 704 // the pointer route. 705 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 706 Width = Target.getPointerWidth(AS); 707 Align = Target.getPointerAlign(AS); 708 break; 709 } 710 case Type::Pointer: { 711 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 712 Width = Target.getPointerWidth(AS); 713 Align = Target.getPointerAlign(AS); 714 break; 715 } 716 case Type::MemberPointer: { 717 QualType Pointee = cast<MemberPointerType>(T)->getPointeeType(); 718 std::pair<uint64_t, unsigned> PtrDiffInfo = 719 getTypeInfo(getPointerDiffType()); 720 Width = PtrDiffInfo.first; 721 if (Pointee->isFunctionType()) 722 Width *= 2; 723 Align = PtrDiffInfo.second; 724 break; 725 } 726 case Type::Complex: { 727 // Complex types have the same alignment as their elements, but twice the 728 // size. 729 std::pair<uint64_t, unsigned> EltInfo = 730 getTypeInfo(cast<ComplexType>(T)->getElementType()); 731 Width = EltInfo.first*2; 732 Align = EltInfo.second; 733 break; 734 } 735 case Type::ObjCObject: 736 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 737 case Type::ObjCInterface: { 738 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 739 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 740 Width = Layout.getSize(); 741 Align = Layout.getAlignment(); 742 break; 743 } 744 case Type::Record: 745 case Type::Enum: { 746 const TagType *TT = cast<TagType>(T); 747 748 if (TT->getDecl()->isInvalidDecl()) { 749 Width = 1; 750 Align = 1; 751 break; 752 } 753 754 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 755 return getTypeInfo(ET->getDecl()->getIntegerType()); 756 757 const RecordType *RT = cast<RecordType>(TT); 758 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 759 Width = Layout.getSize(); 760 Align = Layout.getAlignment(); 761 break; 762 } 763 764 case Type::SubstTemplateTypeParm: 765 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 766 getReplacementType().getTypePtr()); 767 768 case Type::Typedef: { 769 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 770 if (const AlignedAttr *Aligned = Typedef->getAttr<AlignedAttr>()) { 771 Align = std::max(Aligned->getMaxAlignment(), 772 getTypeAlign(Typedef->getUnderlyingType().getTypePtr())); 773 Width = getTypeSize(Typedef->getUnderlyingType().getTypePtr()); 774 } else 775 return getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 776 break; 777 } 778 779 case Type::TypeOfExpr: 780 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 781 .getTypePtr()); 782 783 case Type::TypeOf: 784 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 785 786 case Type::Decltype: 787 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 788 .getTypePtr()); 789 790 case Type::Elaborated: 791 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 792 793 case Type::TemplateSpecialization: 794 assert(getCanonicalType(T) != T && 795 "Cannot request the size of a dependent type"); 796 // FIXME: this is likely to be wrong once we support template 797 // aliases, since a template alias could refer to a typedef that 798 // has an __aligned__ attribute on it. 799 return getTypeInfo(getCanonicalType(T)); 800 } 801 802 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 803 return std::make_pair(Width, Align); 804} 805 806/// getTypeSizeInChars - Return the size of the specified type, in characters. 807/// This method does not work on incomplete types. 808CharUnits ASTContext::getTypeSizeInChars(QualType T) { 809 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 810} 811CharUnits ASTContext::getTypeSizeInChars(const Type *T) { 812 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 813} 814 815/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 816/// characters. This method does not work on incomplete types. 817CharUnits ASTContext::getTypeAlignInChars(QualType T) { 818 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 819} 820CharUnits ASTContext::getTypeAlignInChars(const Type *T) { 821 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 822} 823 824/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 825/// type for the current target in bits. This can be different than the ABI 826/// alignment in cases where it is beneficial for performance to overalign 827/// a data type. 828unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 829 unsigned ABIAlign = getTypeAlign(T); 830 831 // Double and long long should be naturally aligned if possible. 832 if (const ComplexType* CT = T->getAs<ComplexType>()) 833 T = CT->getElementType().getTypePtr(); 834 if (T->isSpecificBuiltinType(BuiltinType::Double) || 835 T->isSpecificBuiltinType(BuiltinType::LongLong)) 836 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 837 838 return ABIAlign; 839} 840 841static void CollectLocalObjCIvars(ASTContext *Ctx, 842 const ObjCInterfaceDecl *OI, 843 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 844 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 845 E = OI->ivar_end(); I != E; ++I) { 846 ObjCIvarDecl *IVDecl = *I; 847 if (!IVDecl->isInvalidDecl()) 848 Fields.push_back(cast<FieldDecl>(IVDecl)); 849 } 850} 851 852void ASTContext::CollectObjCIvars(const ObjCInterfaceDecl *OI, 853 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 854 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 855 CollectObjCIvars(SuperClass, Fields); 856 CollectLocalObjCIvars(this, OI, Fields); 857} 858 859/// ShallowCollectObjCIvars - 860/// Collect all ivars, including those synthesized, in the current class. 861/// 862void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 863 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 864 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 865 E = OI->ivar_end(); I != E; ++I) { 866 Ivars.push_back(*I); 867 } 868 869 CollectNonClassIvars(OI, Ivars); 870} 871 872/// CollectNonClassIvars - 873/// This routine collects all other ivars which are not declared in the class. 874/// This includes synthesized ivars (via @synthesize) and those in 875// class's @implementation. 876/// 877void ASTContext::CollectNonClassIvars(const ObjCInterfaceDecl *OI, 878 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 879 // Find ivars declared in class extension. 880 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl; 881 CDecl = CDecl->getNextClassExtension()) { 882 for (ObjCCategoryDecl::ivar_iterator I = CDecl->ivar_begin(), 883 E = CDecl->ivar_end(); I != E; ++I) { 884 Ivars.push_back(*I); 885 } 886 } 887 888 // Also add any ivar defined in this class's implementation. This 889 // includes synthesized ivars. 890 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) { 891 for (ObjCImplementationDecl::ivar_iterator I = ImplDecl->ivar_begin(), 892 E = ImplDecl->ivar_end(); I != E; ++I) 893 Ivars.push_back(*I); 894 } 895} 896 897/// CollectInheritedProtocols - Collect all protocols in current class and 898/// those inherited by it. 899void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 900 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 901 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 902 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 903 PE = OI->protocol_end(); P != PE; ++P) { 904 ObjCProtocolDecl *Proto = (*P); 905 Protocols.insert(Proto); 906 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 907 PE = Proto->protocol_end(); P != PE; ++P) { 908 Protocols.insert(*P); 909 CollectInheritedProtocols(*P, Protocols); 910 } 911 } 912 913 // Categories of this Interface. 914 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 915 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 916 CollectInheritedProtocols(CDeclChain, Protocols); 917 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 918 while (SD) { 919 CollectInheritedProtocols(SD, Protocols); 920 SD = SD->getSuperClass(); 921 } 922 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 923 for (ObjCInterfaceDecl::protocol_iterator P = OC->protocol_begin(), 924 PE = OC->protocol_end(); P != PE; ++P) { 925 ObjCProtocolDecl *Proto = (*P); 926 Protocols.insert(Proto); 927 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 928 PE = Proto->protocol_end(); P != PE; ++P) 929 CollectInheritedProtocols(*P, Protocols); 930 } 931 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 932 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 933 PE = OP->protocol_end(); P != PE; ++P) { 934 ObjCProtocolDecl *Proto = (*P); 935 Protocols.insert(Proto); 936 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 937 PE = Proto->protocol_end(); P != PE; ++P) 938 CollectInheritedProtocols(*P, Protocols); 939 } 940 } 941} 942 943unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) { 944 unsigned count = 0; 945 // Count ivars declared in class extension. 946 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl; 947 CDecl = CDecl->getNextClassExtension()) 948 count += CDecl->ivar_size(); 949 950 // Count ivar defined in this class's implementation. This 951 // includes synthesized ivars. 952 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 953 count += ImplDecl->ivar_size(); 954 955 return count; 956} 957 958/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 959ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 960 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 961 I = ObjCImpls.find(D); 962 if (I != ObjCImpls.end()) 963 return cast<ObjCImplementationDecl>(I->second); 964 return 0; 965} 966/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 967ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 968 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 969 I = ObjCImpls.find(D); 970 if (I != ObjCImpls.end()) 971 return cast<ObjCCategoryImplDecl>(I->second); 972 return 0; 973} 974 975/// \brief Set the implementation of ObjCInterfaceDecl. 976void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 977 ObjCImplementationDecl *ImplD) { 978 assert(IFaceD && ImplD && "Passed null params"); 979 ObjCImpls[IFaceD] = ImplD; 980} 981/// \brief Set the implementation of ObjCCategoryDecl. 982void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 983 ObjCCategoryImplDecl *ImplD) { 984 assert(CatD && ImplD && "Passed null params"); 985 ObjCImpls[CatD] = ImplD; 986} 987 988/// \brief Allocate an uninitialized TypeSourceInfo. 989/// 990/// The caller should initialize the memory held by TypeSourceInfo using 991/// the TypeLoc wrappers. 992/// 993/// \param T the type that will be the basis for type source info. This type 994/// should refer to how the declarator was written in source code, not to 995/// what type semantic analysis resolved the declarator to. 996TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 997 unsigned DataSize) { 998 if (!DataSize) 999 DataSize = TypeLoc::getFullDataSizeForType(T); 1000 else 1001 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 1002 "incorrect data size provided to CreateTypeSourceInfo!"); 1003 1004 TypeSourceInfo *TInfo = 1005 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 1006 new (TInfo) TypeSourceInfo(T); 1007 return TInfo; 1008} 1009 1010TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1011 SourceLocation L) { 1012 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1013 DI->getTypeLoc().initialize(L); 1014 return DI; 1015} 1016 1017const ASTRecordLayout & 1018ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 1019 return getObjCLayout(D, 0); 1020} 1021 1022const ASTRecordLayout & 1023ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 1024 return getObjCLayout(D->getClassInterface(), D); 1025} 1026 1027//===----------------------------------------------------------------------===// 1028// Type creation/memoization methods 1029//===----------------------------------------------------------------------===// 1030 1031QualType ASTContext::getExtQualType(const Type *TypeNode, Qualifiers Quals) { 1032 unsigned Fast = Quals.getFastQualifiers(); 1033 Quals.removeFastQualifiers(); 1034 1035 // Check if we've already instantiated this type. 1036 llvm::FoldingSetNodeID ID; 1037 ExtQuals::Profile(ID, TypeNode, Quals); 1038 void *InsertPos = 0; 1039 if (ExtQuals *EQ = ExtQualNodes.FindNodeOrInsertPos(ID, InsertPos)) { 1040 assert(EQ->getQualifiers() == Quals); 1041 QualType T = QualType(EQ, Fast); 1042 return T; 1043 } 1044 1045 ExtQuals *New = new (*this, TypeAlignment) ExtQuals(*this, TypeNode, Quals); 1046 ExtQualNodes.InsertNode(New, InsertPos); 1047 QualType T = QualType(New, Fast); 1048 return T; 1049} 1050 1051QualType ASTContext::getVolatileType(QualType T) { 1052 QualType CanT = getCanonicalType(T); 1053 if (CanT.isVolatileQualified()) return T; 1054 1055 QualifierCollector Quals; 1056 const Type *TypeNode = Quals.strip(T); 1057 Quals.addVolatile(); 1058 1059 return getExtQualType(TypeNode, Quals); 1060} 1061 1062QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 1063 QualType CanT = getCanonicalType(T); 1064 if (CanT.getAddressSpace() == AddressSpace) 1065 return T; 1066 1067 // If we are composing extended qualifiers together, merge together 1068 // into one ExtQuals node. 1069 QualifierCollector Quals; 1070 const Type *TypeNode = Quals.strip(T); 1071 1072 // If this type already has an address space specified, it cannot get 1073 // another one. 1074 assert(!Quals.hasAddressSpace() && 1075 "Type cannot be in multiple addr spaces!"); 1076 Quals.addAddressSpace(AddressSpace); 1077 1078 return getExtQualType(TypeNode, Quals); 1079} 1080 1081QualType ASTContext::getObjCGCQualType(QualType T, 1082 Qualifiers::GC GCAttr) { 1083 QualType CanT = getCanonicalType(T); 1084 if (CanT.getObjCGCAttr() == GCAttr) 1085 return T; 1086 1087 if (T->isPointerType()) { 1088 QualType Pointee = T->getAs<PointerType>()->getPointeeType(); 1089 if (Pointee->isAnyPointerType()) { 1090 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1091 return getPointerType(ResultType); 1092 } 1093 } 1094 1095 // If we are composing extended qualifiers together, merge together 1096 // into one ExtQuals node. 1097 QualifierCollector Quals; 1098 const Type *TypeNode = Quals.strip(T); 1099 1100 // If this type already has an ObjCGC specified, it cannot get 1101 // another one. 1102 assert(!Quals.hasObjCGCAttr() && 1103 "Type cannot have multiple ObjCGCs!"); 1104 Quals.addObjCGCAttr(GCAttr); 1105 1106 return getExtQualType(TypeNode, Quals); 1107} 1108 1109static QualType getExtFunctionType(ASTContext& Context, QualType T, 1110 const FunctionType::ExtInfo &Info) { 1111 QualType ResultType; 1112 if (const PointerType *Pointer = T->getAs<PointerType>()) { 1113 QualType Pointee = Pointer->getPointeeType(); 1114 ResultType = getExtFunctionType(Context, Pointee, Info); 1115 if (ResultType == Pointee) 1116 return T; 1117 1118 ResultType = Context.getPointerType(ResultType); 1119 } else if (const BlockPointerType *BlockPointer 1120 = T->getAs<BlockPointerType>()) { 1121 QualType Pointee = BlockPointer->getPointeeType(); 1122 ResultType = getExtFunctionType(Context, Pointee, Info); 1123 if (ResultType == Pointee) 1124 return T; 1125 1126 ResultType = Context.getBlockPointerType(ResultType); 1127 } else if (const FunctionType *F = T->getAs<FunctionType>()) { 1128 if (F->getExtInfo() == Info) 1129 return T; 1130 1131 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(F)) { 1132 ResultType = Context.getFunctionNoProtoType(FNPT->getResultType(), 1133 Info); 1134 } else { 1135 const FunctionProtoType *FPT = cast<FunctionProtoType>(F); 1136 ResultType 1137 = Context.getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1138 FPT->getNumArgs(), FPT->isVariadic(), 1139 FPT->getTypeQuals(), 1140 FPT->hasExceptionSpec(), 1141 FPT->hasAnyExceptionSpec(), 1142 FPT->getNumExceptions(), 1143 FPT->exception_begin(), 1144 Info); 1145 } 1146 } else 1147 return T; 1148 1149 return Context.getQualifiedType(ResultType, T.getLocalQualifiers()); 1150} 1151 1152QualType ASTContext::getNoReturnType(QualType T, bool AddNoReturn) { 1153 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1154 return getExtFunctionType(*this, T, 1155 Info.withNoReturn(AddNoReturn)); 1156} 1157 1158QualType ASTContext::getCallConvType(QualType T, CallingConv CallConv) { 1159 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1160 return getExtFunctionType(*this, T, 1161 Info.withCallingConv(CallConv)); 1162} 1163 1164QualType ASTContext::getRegParmType(QualType T, unsigned RegParm) { 1165 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1166 return getExtFunctionType(*this, T, 1167 Info.withRegParm(RegParm)); 1168} 1169 1170/// getComplexType - Return the uniqued reference to the type for a complex 1171/// number with the specified element type. 1172QualType ASTContext::getComplexType(QualType T) { 1173 // Unique pointers, to guarantee there is only one pointer of a particular 1174 // structure. 1175 llvm::FoldingSetNodeID ID; 1176 ComplexType::Profile(ID, T); 1177 1178 void *InsertPos = 0; 1179 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1180 return QualType(CT, 0); 1181 1182 // If the pointee type isn't canonical, this won't be a canonical type either, 1183 // so fill in the canonical type field. 1184 QualType Canonical; 1185 if (!T.isCanonical()) { 1186 Canonical = getComplexType(getCanonicalType(T)); 1187 1188 // Get the new insert position for the node we care about. 1189 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1190 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1191 } 1192 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1193 Types.push_back(New); 1194 ComplexTypes.InsertNode(New, InsertPos); 1195 return QualType(New, 0); 1196} 1197 1198/// getPointerType - Return the uniqued reference to the type for a pointer to 1199/// the specified type. 1200QualType ASTContext::getPointerType(QualType T) { 1201 // Unique pointers, to guarantee there is only one pointer of a particular 1202 // structure. 1203 llvm::FoldingSetNodeID ID; 1204 PointerType::Profile(ID, T); 1205 1206 void *InsertPos = 0; 1207 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1208 return QualType(PT, 0); 1209 1210 // If the pointee type isn't canonical, this won't be a canonical type either, 1211 // so fill in the canonical type field. 1212 QualType Canonical; 1213 if (!T.isCanonical()) { 1214 Canonical = getPointerType(getCanonicalType(T)); 1215 1216 // Get the new insert position for the node we care about. 1217 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1218 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1219 } 1220 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1221 Types.push_back(New); 1222 PointerTypes.InsertNode(New, InsertPos); 1223 return QualType(New, 0); 1224} 1225 1226/// getBlockPointerType - Return the uniqued reference to the type for 1227/// a pointer to the specified block. 1228QualType ASTContext::getBlockPointerType(QualType T) { 1229 assert(T->isFunctionType() && "block of function types only"); 1230 // Unique pointers, to guarantee there is only one block of a particular 1231 // structure. 1232 llvm::FoldingSetNodeID ID; 1233 BlockPointerType::Profile(ID, T); 1234 1235 void *InsertPos = 0; 1236 if (BlockPointerType *PT = 1237 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1238 return QualType(PT, 0); 1239 1240 // If the block pointee type isn't canonical, this won't be a canonical 1241 // type either so fill in the canonical type field. 1242 QualType Canonical; 1243 if (!T.isCanonical()) { 1244 Canonical = getBlockPointerType(getCanonicalType(T)); 1245 1246 // Get the new insert position for the node we care about. 1247 BlockPointerType *NewIP = 1248 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1249 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1250 } 1251 BlockPointerType *New 1252 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1253 Types.push_back(New); 1254 BlockPointerTypes.InsertNode(New, InsertPos); 1255 return QualType(New, 0); 1256} 1257 1258/// getLValueReferenceType - Return the uniqued reference to the type for an 1259/// lvalue reference to the specified type. 1260QualType ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) { 1261 // Unique pointers, to guarantee there is only one pointer of a particular 1262 // structure. 1263 llvm::FoldingSetNodeID ID; 1264 ReferenceType::Profile(ID, T, SpelledAsLValue); 1265 1266 void *InsertPos = 0; 1267 if (LValueReferenceType *RT = 1268 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1269 return QualType(RT, 0); 1270 1271 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1272 1273 // If the referencee type isn't canonical, this won't be a canonical type 1274 // either, so fill in the canonical type field. 1275 QualType Canonical; 1276 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1277 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1278 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1279 1280 // Get the new insert position for the node we care about. 1281 LValueReferenceType *NewIP = 1282 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1283 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1284 } 1285 1286 LValueReferenceType *New 1287 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1288 SpelledAsLValue); 1289 Types.push_back(New); 1290 LValueReferenceTypes.InsertNode(New, InsertPos); 1291 1292 return QualType(New, 0); 1293} 1294 1295/// getRValueReferenceType - Return the uniqued reference to the type for an 1296/// rvalue reference to the specified type. 1297QualType ASTContext::getRValueReferenceType(QualType T) { 1298 // Unique pointers, to guarantee there is only one pointer of a particular 1299 // structure. 1300 llvm::FoldingSetNodeID ID; 1301 ReferenceType::Profile(ID, T, false); 1302 1303 void *InsertPos = 0; 1304 if (RValueReferenceType *RT = 1305 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1306 return QualType(RT, 0); 1307 1308 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1309 1310 // If the referencee type isn't canonical, this won't be a canonical type 1311 // either, so fill in the canonical type field. 1312 QualType Canonical; 1313 if (InnerRef || !T.isCanonical()) { 1314 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1315 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1316 1317 // Get the new insert position for the node we care about. 1318 RValueReferenceType *NewIP = 1319 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1320 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1321 } 1322 1323 RValueReferenceType *New 1324 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1325 Types.push_back(New); 1326 RValueReferenceTypes.InsertNode(New, InsertPos); 1327 return QualType(New, 0); 1328} 1329 1330/// getMemberPointerType - Return the uniqued reference to the type for a 1331/// member pointer to the specified type, in the specified class. 1332QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) { 1333 // Unique pointers, to guarantee there is only one pointer of a particular 1334 // structure. 1335 llvm::FoldingSetNodeID ID; 1336 MemberPointerType::Profile(ID, T, Cls); 1337 1338 void *InsertPos = 0; 1339 if (MemberPointerType *PT = 1340 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1341 return QualType(PT, 0); 1342 1343 // If the pointee or class type isn't canonical, this won't be a canonical 1344 // type either, so fill in the canonical type field. 1345 QualType Canonical; 1346 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1347 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1348 1349 // Get the new insert position for the node we care about. 1350 MemberPointerType *NewIP = 1351 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1352 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1353 } 1354 MemberPointerType *New 1355 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1356 Types.push_back(New); 1357 MemberPointerTypes.InsertNode(New, InsertPos); 1358 return QualType(New, 0); 1359} 1360 1361/// getConstantArrayType - Return the unique reference to the type for an 1362/// array of the specified element type. 1363QualType ASTContext::getConstantArrayType(QualType EltTy, 1364 const llvm::APInt &ArySizeIn, 1365 ArrayType::ArraySizeModifier ASM, 1366 unsigned EltTypeQuals) { 1367 assert((EltTy->isDependentType() || 1368 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1369 "Constant array of VLAs is illegal!"); 1370 1371 // Convert the array size into a canonical width matching the pointer size for 1372 // the target. 1373 llvm::APInt ArySize(ArySizeIn); 1374 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1375 1376 llvm::FoldingSetNodeID ID; 1377 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1378 1379 void *InsertPos = 0; 1380 if (ConstantArrayType *ATP = 1381 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1382 return QualType(ATP, 0); 1383 1384 // If the element type isn't canonical, this won't be a canonical type either, 1385 // so fill in the canonical type field. 1386 QualType Canonical; 1387 if (!EltTy.isCanonical()) { 1388 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1389 ASM, EltTypeQuals); 1390 // Get the new insert position for the node we care about. 1391 ConstantArrayType *NewIP = 1392 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1393 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1394 } 1395 1396 ConstantArrayType *New = new(*this,TypeAlignment) 1397 ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1398 ConstantArrayTypes.InsertNode(New, InsertPos); 1399 Types.push_back(New); 1400 return QualType(New, 0); 1401} 1402 1403/// getVariableArrayType - Returns a non-unique reference to the type for a 1404/// variable array of the specified element type. 1405QualType ASTContext::getVariableArrayType(QualType EltTy, 1406 Expr *NumElts, 1407 ArrayType::ArraySizeModifier ASM, 1408 unsigned EltTypeQuals, 1409 SourceRange Brackets) { 1410 // Since we don't unique expressions, it isn't possible to unique VLA's 1411 // that have an expression provided for their size. 1412 QualType CanonType; 1413 1414 if (!EltTy.isCanonical()) { 1415 if (NumElts) 1416 NumElts->Retain(); 1417 CanonType = getVariableArrayType(getCanonicalType(EltTy), NumElts, ASM, 1418 EltTypeQuals, Brackets); 1419 } 1420 1421 VariableArrayType *New = new(*this, TypeAlignment) 1422 VariableArrayType(EltTy, CanonType, NumElts, ASM, EltTypeQuals, Brackets); 1423 1424 VariableArrayTypes.push_back(New); 1425 Types.push_back(New); 1426 return QualType(New, 0); 1427} 1428 1429/// getDependentSizedArrayType - Returns a non-unique reference to 1430/// the type for a dependently-sized array of the specified element 1431/// type. 1432QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1433 Expr *NumElts, 1434 ArrayType::ArraySizeModifier ASM, 1435 unsigned EltTypeQuals, 1436 SourceRange Brackets) { 1437 assert((!NumElts || NumElts->isTypeDependent() || 1438 NumElts->isValueDependent()) && 1439 "Size must be type- or value-dependent!"); 1440 1441 void *InsertPos = 0; 1442 DependentSizedArrayType *Canon = 0; 1443 llvm::FoldingSetNodeID ID; 1444 1445 if (NumElts) { 1446 // Dependently-sized array types that do not have a specified 1447 // number of elements will have their sizes deduced from an 1448 // initializer. 1449 DependentSizedArrayType::Profile(ID, *this, getCanonicalType(EltTy), ASM, 1450 EltTypeQuals, NumElts); 1451 1452 Canon = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1453 } 1454 1455 DependentSizedArrayType *New; 1456 if (Canon) { 1457 // We already have a canonical version of this array type; use it as 1458 // the canonical type for a newly-built type. 1459 New = new (*this, TypeAlignment) 1460 DependentSizedArrayType(*this, EltTy, QualType(Canon, 0), 1461 NumElts, ASM, EltTypeQuals, Brackets); 1462 } else { 1463 QualType CanonEltTy = getCanonicalType(EltTy); 1464 if (CanonEltTy == EltTy) { 1465 New = new (*this, TypeAlignment) 1466 DependentSizedArrayType(*this, EltTy, QualType(), 1467 NumElts, ASM, EltTypeQuals, Brackets); 1468 1469 if (NumElts) { 1470 DependentSizedArrayType *CanonCheck 1471 = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1472 assert(!CanonCheck && "Dependent-sized canonical array type broken"); 1473 (void)CanonCheck; 1474 DependentSizedArrayTypes.InsertNode(New, InsertPos); 1475 } 1476 } else { 1477 QualType Canon = getDependentSizedArrayType(CanonEltTy, NumElts, 1478 ASM, EltTypeQuals, 1479 SourceRange()); 1480 New = new (*this, TypeAlignment) 1481 DependentSizedArrayType(*this, EltTy, Canon, 1482 NumElts, ASM, EltTypeQuals, Brackets); 1483 } 1484 } 1485 1486 Types.push_back(New); 1487 return QualType(New, 0); 1488} 1489 1490QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1491 ArrayType::ArraySizeModifier ASM, 1492 unsigned EltTypeQuals) { 1493 llvm::FoldingSetNodeID ID; 1494 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1495 1496 void *InsertPos = 0; 1497 if (IncompleteArrayType *ATP = 1498 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1499 return QualType(ATP, 0); 1500 1501 // If the element type isn't canonical, this won't be a canonical type 1502 // either, so fill in the canonical type field. 1503 QualType Canonical; 1504 1505 if (!EltTy.isCanonical()) { 1506 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1507 ASM, EltTypeQuals); 1508 1509 // Get the new insert position for the node we care about. 1510 IncompleteArrayType *NewIP = 1511 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1512 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1513 } 1514 1515 IncompleteArrayType *New = new (*this, TypeAlignment) 1516 IncompleteArrayType(EltTy, Canonical, ASM, EltTypeQuals); 1517 1518 IncompleteArrayTypes.InsertNode(New, InsertPos); 1519 Types.push_back(New); 1520 return QualType(New, 0); 1521} 1522 1523/// getVectorType - Return the unique reference to a vector type of 1524/// the specified element type and size. VectorType must be a built-in type. 1525QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1526 VectorType::AltiVecSpecific AltiVecSpec) { 1527 BuiltinType *baseType; 1528 1529 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1530 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1531 1532 // Check if we've already instantiated a vector of this type. 1533 llvm::FoldingSetNodeID ID; 1534 VectorType::Profile(ID, vecType, NumElts, Type::Vector, AltiVecSpec); 1535 1536 void *InsertPos = 0; 1537 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1538 return QualType(VTP, 0); 1539 1540 // If the element type isn't canonical, this won't be a canonical type either, 1541 // so fill in the canonical type field. 1542 QualType Canonical; 1543 if (!vecType.isCanonical()) { 1544 Canonical = getVectorType(getCanonicalType(vecType), NumElts, 1545 VectorType::NotAltiVec); 1546 1547 // Get the new insert position for the node we care about. 1548 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1549 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1550 } 1551 VectorType *New = new (*this, TypeAlignment) 1552 VectorType(vecType, NumElts, Canonical, AltiVecSpec); 1553 VectorTypes.InsertNode(New, InsertPos); 1554 Types.push_back(New); 1555 return QualType(New, 0); 1556} 1557 1558/// getExtVectorType - Return the unique reference to an extended vector type of 1559/// the specified element type and size. VectorType must be a built-in type. 1560QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1561 BuiltinType *baseType; 1562 1563 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1564 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1565 1566 // Check if we've already instantiated a vector of this type. 1567 llvm::FoldingSetNodeID ID; 1568 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, 1569 VectorType::NotAltiVec); 1570 void *InsertPos = 0; 1571 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1572 return QualType(VTP, 0); 1573 1574 // If the element type isn't canonical, this won't be a canonical type either, 1575 // so fill in the canonical type field. 1576 QualType Canonical; 1577 if (!vecType.isCanonical()) { 1578 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1579 1580 // Get the new insert position for the node we care about. 1581 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1582 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1583 } 1584 ExtVectorType *New = new (*this, TypeAlignment) 1585 ExtVectorType(vecType, NumElts, Canonical); 1586 VectorTypes.InsertNode(New, InsertPos); 1587 Types.push_back(New); 1588 return QualType(New, 0); 1589} 1590 1591QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1592 Expr *SizeExpr, 1593 SourceLocation AttrLoc) { 1594 llvm::FoldingSetNodeID ID; 1595 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1596 SizeExpr); 1597 1598 void *InsertPos = 0; 1599 DependentSizedExtVectorType *Canon 1600 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1601 DependentSizedExtVectorType *New; 1602 if (Canon) { 1603 // We already have a canonical version of this array type; use it as 1604 // the canonical type for a newly-built type. 1605 New = new (*this, TypeAlignment) 1606 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1607 SizeExpr, AttrLoc); 1608 } else { 1609 QualType CanonVecTy = getCanonicalType(vecType); 1610 if (CanonVecTy == vecType) { 1611 New = new (*this, TypeAlignment) 1612 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1613 AttrLoc); 1614 1615 DependentSizedExtVectorType *CanonCheck 1616 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1617 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1618 (void)CanonCheck; 1619 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1620 } else { 1621 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1622 SourceLocation()); 1623 New = new (*this, TypeAlignment) 1624 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1625 } 1626 } 1627 1628 Types.push_back(New); 1629 return QualType(New, 0); 1630} 1631 1632/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1633/// 1634QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, 1635 const FunctionType::ExtInfo &Info) { 1636 const CallingConv CallConv = Info.getCC(); 1637 // Unique functions, to guarantee there is only one function of a particular 1638 // structure. 1639 llvm::FoldingSetNodeID ID; 1640 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1641 1642 void *InsertPos = 0; 1643 if (FunctionNoProtoType *FT = 1644 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1645 return QualType(FT, 0); 1646 1647 QualType Canonical; 1648 if (!ResultTy.isCanonical() || 1649 getCanonicalCallConv(CallConv) != CallConv) { 1650 Canonical = 1651 getFunctionNoProtoType(getCanonicalType(ResultTy), 1652 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1653 1654 // Get the new insert position for the node we care about. 1655 FunctionNoProtoType *NewIP = 1656 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1657 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1658 } 1659 1660 FunctionNoProtoType *New = new (*this, TypeAlignment) 1661 FunctionNoProtoType(ResultTy, Canonical, Info); 1662 Types.push_back(New); 1663 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1664 return QualType(New, 0); 1665} 1666 1667/// getFunctionType - Return a normal function type with a typed argument 1668/// list. isVariadic indicates whether the argument list includes '...'. 1669QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1670 unsigned NumArgs, bool isVariadic, 1671 unsigned TypeQuals, bool hasExceptionSpec, 1672 bool hasAnyExceptionSpec, unsigned NumExs, 1673 const QualType *ExArray, 1674 const FunctionType::ExtInfo &Info) { 1675 const CallingConv CallConv= Info.getCC(); 1676 // Unique functions, to guarantee there is only one function of a particular 1677 // structure. 1678 llvm::FoldingSetNodeID ID; 1679 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1680 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1681 NumExs, ExArray, Info); 1682 1683 void *InsertPos = 0; 1684 if (FunctionProtoType *FTP = 1685 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1686 return QualType(FTP, 0); 1687 1688 // Determine whether the type being created is already canonical or not. 1689 bool isCanonical = !hasExceptionSpec && ResultTy.isCanonical(); 1690 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1691 if (!ArgArray[i].isCanonicalAsParam()) 1692 isCanonical = false; 1693 1694 // If this type isn't canonical, get the canonical version of it. 1695 // The exception spec is not part of the canonical type. 1696 QualType Canonical; 1697 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1698 llvm::SmallVector<QualType, 16> CanonicalArgs; 1699 CanonicalArgs.reserve(NumArgs); 1700 for (unsigned i = 0; i != NumArgs; ++i) 1701 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1702 1703 Canonical = getFunctionType(getCanonicalType(ResultTy), 1704 CanonicalArgs.data(), NumArgs, 1705 isVariadic, TypeQuals, false, 1706 false, 0, 0, 1707 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1708 1709 // Get the new insert position for the node we care about. 1710 FunctionProtoType *NewIP = 1711 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1712 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1713 } 1714 1715 // FunctionProtoType objects are allocated with extra bytes after them 1716 // for two variable size arrays (for parameter and exception types) at the 1717 // end of them. 1718 FunctionProtoType *FTP = 1719 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1720 NumArgs*sizeof(QualType) + 1721 NumExs*sizeof(QualType), TypeAlignment); 1722 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1723 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1724 ExArray, NumExs, Canonical, Info); 1725 Types.push_back(FTP); 1726 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1727 return QualType(FTP, 0); 1728} 1729 1730#ifndef NDEBUG 1731static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1732 if (!isa<CXXRecordDecl>(D)) return false; 1733 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1734 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1735 return true; 1736 if (RD->getDescribedClassTemplate() && 1737 !isa<ClassTemplateSpecializationDecl>(RD)) 1738 return true; 1739 return false; 1740} 1741#endif 1742 1743/// getInjectedClassNameType - Return the unique reference to the 1744/// injected class name type for the specified templated declaration. 1745QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1746 QualType TST) { 1747 assert(NeedsInjectedClassNameType(Decl)); 1748 if (Decl->TypeForDecl) { 1749 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1750 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDeclaration()) { 1751 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1752 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1753 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1754 } else { 1755 Decl->TypeForDecl = 1756 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 1757 Types.push_back(Decl->TypeForDecl); 1758 } 1759 return QualType(Decl->TypeForDecl, 0); 1760} 1761 1762/// getTypeDeclType - Return the unique reference to the type for the 1763/// specified type declaration. 1764QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) { 1765 assert(Decl && "Passed null for Decl param"); 1766 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 1767 1768 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1769 return getTypedefType(Typedef); 1770 1771 assert(!isa<TemplateTypeParmDecl>(Decl) && 1772 "Template type parameter types are always available."); 1773 1774 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1775 assert(!Record->getPreviousDeclaration() && 1776 "struct/union has previous declaration"); 1777 assert(!NeedsInjectedClassNameType(Record)); 1778 return getRecordType(Record); 1779 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1780 assert(!Enum->getPreviousDeclaration() && 1781 "enum has previous declaration"); 1782 return getEnumType(Enum); 1783 } else if (const UnresolvedUsingTypenameDecl *Using = 1784 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1785 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1786 } else 1787 llvm_unreachable("TypeDecl without a type?"); 1788 1789 Types.push_back(Decl->TypeForDecl); 1790 return QualType(Decl->TypeForDecl, 0); 1791} 1792 1793/// getTypedefType - Return the unique reference to the type for the 1794/// specified typename decl. 1795QualType 1796ASTContext::getTypedefType(const TypedefDecl *Decl, QualType Canonical) { 1797 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1798 1799 if (Canonical.isNull()) 1800 Canonical = getCanonicalType(Decl->getUnderlyingType()); 1801 Decl->TypeForDecl = new(*this, TypeAlignment) 1802 TypedefType(Type::Typedef, Decl, Canonical); 1803 Types.push_back(Decl->TypeForDecl); 1804 return QualType(Decl->TypeForDecl, 0); 1805} 1806 1807QualType ASTContext::getRecordType(const RecordDecl *Decl) { 1808 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1809 1810 if (const RecordDecl *PrevDecl = Decl->getPreviousDeclaration()) 1811 if (PrevDecl->TypeForDecl) 1812 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 1813 1814 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Decl); 1815 Types.push_back(Decl->TypeForDecl); 1816 return QualType(Decl->TypeForDecl, 0); 1817} 1818 1819QualType ASTContext::getEnumType(const EnumDecl *Decl) { 1820 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1821 1822 if (const EnumDecl *PrevDecl = Decl->getPreviousDeclaration()) 1823 if (PrevDecl->TypeForDecl) 1824 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 1825 1826 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Decl); 1827 Types.push_back(Decl->TypeForDecl); 1828 return QualType(Decl->TypeForDecl, 0); 1829} 1830 1831/// \brief Retrieve a substitution-result type. 1832QualType 1833ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1834 QualType Replacement) { 1835 assert(Replacement.isCanonical() 1836 && "replacement types must always be canonical"); 1837 1838 llvm::FoldingSetNodeID ID; 1839 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1840 void *InsertPos = 0; 1841 SubstTemplateTypeParmType *SubstParm 1842 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1843 1844 if (!SubstParm) { 1845 SubstParm = new (*this, TypeAlignment) 1846 SubstTemplateTypeParmType(Parm, Replacement); 1847 Types.push_back(SubstParm); 1848 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1849 } 1850 1851 return QualType(SubstParm, 0); 1852} 1853 1854/// \brief Retrieve the template type parameter type for a template 1855/// parameter or parameter pack with the given depth, index, and (optionally) 1856/// name. 1857QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1858 bool ParameterPack, 1859 IdentifierInfo *Name) { 1860 llvm::FoldingSetNodeID ID; 1861 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1862 void *InsertPos = 0; 1863 TemplateTypeParmType *TypeParm 1864 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1865 1866 if (TypeParm) 1867 return QualType(TypeParm, 0); 1868 1869 if (Name) { 1870 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1871 TypeParm = new (*this, TypeAlignment) 1872 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 1873 1874 TemplateTypeParmType *TypeCheck 1875 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1876 assert(!TypeCheck && "Template type parameter canonical type broken"); 1877 (void)TypeCheck; 1878 } else 1879 TypeParm = new (*this, TypeAlignment) 1880 TemplateTypeParmType(Depth, Index, ParameterPack); 1881 1882 Types.push_back(TypeParm); 1883 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1884 1885 return QualType(TypeParm, 0); 1886} 1887 1888TypeSourceInfo * 1889ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 1890 SourceLocation NameLoc, 1891 const TemplateArgumentListInfo &Args, 1892 QualType CanonType) { 1893 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 1894 1895 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 1896 TemplateSpecializationTypeLoc TL 1897 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 1898 TL.setTemplateNameLoc(NameLoc); 1899 TL.setLAngleLoc(Args.getLAngleLoc()); 1900 TL.setRAngleLoc(Args.getRAngleLoc()); 1901 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 1902 TL.setArgLocInfo(i, Args[i].getLocInfo()); 1903 return DI; 1904} 1905 1906QualType 1907ASTContext::getTemplateSpecializationType(TemplateName Template, 1908 const TemplateArgumentListInfo &Args, 1909 QualType Canon) { 1910 unsigned NumArgs = Args.size(); 1911 1912 llvm::SmallVector<TemplateArgument, 4> ArgVec; 1913 ArgVec.reserve(NumArgs); 1914 for (unsigned i = 0; i != NumArgs; ++i) 1915 ArgVec.push_back(Args[i].getArgument()); 1916 1917 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 1918 Canon); 1919} 1920 1921QualType 1922ASTContext::getTemplateSpecializationType(TemplateName Template, 1923 const TemplateArgument *Args, 1924 unsigned NumArgs, 1925 QualType Canon) { 1926 if (!Canon.isNull()) 1927 Canon = getCanonicalType(Canon); 1928 else 1929 Canon = getCanonicalTemplateSpecializationType(Template, Args, NumArgs); 1930 1931 // Allocate the (non-canonical) template specialization type, but don't 1932 // try to unique it: these types typically have location information that 1933 // we don't unique and don't want to lose. 1934 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1935 sizeof(TemplateArgument) * NumArgs), 1936 TypeAlignment); 1937 TemplateSpecializationType *Spec 1938 = new (Mem) TemplateSpecializationType(Template, 1939 Args, NumArgs, 1940 Canon); 1941 1942 Types.push_back(Spec); 1943 return QualType(Spec, 0); 1944} 1945 1946QualType 1947ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template, 1948 const TemplateArgument *Args, 1949 unsigned NumArgs) { 1950 // Build the canonical template specialization type. 1951 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 1952 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 1953 CanonArgs.reserve(NumArgs); 1954 for (unsigned I = 0; I != NumArgs; ++I) 1955 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 1956 1957 // Determine whether this canonical template specialization type already 1958 // exists. 1959 llvm::FoldingSetNodeID ID; 1960 TemplateSpecializationType::Profile(ID, CanonTemplate, 1961 CanonArgs.data(), NumArgs, *this); 1962 1963 void *InsertPos = 0; 1964 TemplateSpecializationType *Spec 1965 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1966 1967 if (!Spec) { 1968 // Allocate a new canonical template specialization type. 1969 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1970 sizeof(TemplateArgument) * NumArgs), 1971 TypeAlignment); 1972 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 1973 CanonArgs.data(), NumArgs, 1974 QualType()); 1975 Types.push_back(Spec); 1976 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1977 } 1978 1979 assert(Spec->isDependentType() && 1980 "Non-dependent template-id type must have a canonical type"); 1981 return QualType(Spec, 0); 1982} 1983 1984QualType 1985ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 1986 NestedNameSpecifier *NNS, 1987 QualType NamedType) { 1988 llvm::FoldingSetNodeID ID; 1989 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 1990 1991 void *InsertPos = 0; 1992 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1993 if (T) 1994 return QualType(T, 0); 1995 1996 QualType Canon = NamedType; 1997 if (!Canon.isCanonical()) { 1998 Canon = getCanonicalType(NamedType); 1999 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2000 assert(!CheckT && "Elaborated canonical type broken"); 2001 (void)CheckT; 2002 } 2003 2004 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 2005 Types.push_back(T); 2006 ElaboratedTypes.InsertNode(T, InsertPos); 2007 return QualType(T, 0); 2008} 2009 2010QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 2011 NestedNameSpecifier *NNS, 2012 const IdentifierInfo *Name, 2013 QualType Canon) { 2014 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2015 2016 if (Canon.isNull()) { 2017 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2018 ElaboratedTypeKeyword CanonKeyword = Keyword; 2019 if (Keyword == ETK_None) 2020 CanonKeyword = ETK_Typename; 2021 2022 if (CanonNNS != NNS || CanonKeyword != Keyword) 2023 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 2024 } 2025 2026 llvm::FoldingSetNodeID ID; 2027 DependentNameType::Profile(ID, Keyword, NNS, Name); 2028 2029 void *InsertPos = 0; 2030 DependentNameType *T 2031 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2032 if (T) 2033 return QualType(T, 0); 2034 2035 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 2036 Types.push_back(T); 2037 DependentNameTypes.InsertNode(T, InsertPos); 2038 return QualType(T, 0); 2039} 2040 2041QualType 2042ASTContext::getDependentTemplateSpecializationType( 2043 ElaboratedTypeKeyword Keyword, 2044 NestedNameSpecifier *NNS, 2045 const IdentifierInfo *Name, 2046 const TemplateArgumentListInfo &Args) { 2047 // TODO: avoid this copy 2048 llvm::SmallVector<TemplateArgument, 16> ArgCopy; 2049 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2050 ArgCopy.push_back(Args[I].getArgument()); 2051 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2052 ArgCopy.size(), 2053 ArgCopy.data()); 2054} 2055 2056QualType 2057ASTContext::getDependentTemplateSpecializationType( 2058 ElaboratedTypeKeyword Keyword, 2059 NestedNameSpecifier *NNS, 2060 const IdentifierInfo *Name, 2061 unsigned NumArgs, 2062 const TemplateArgument *Args) { 2063 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2064 2065 llvm::FoldingSetNodeID ID; 2066 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2067 Name, NumArgs, Args); 2068 2069 void *InsertPos = 0; 2070 DependentTemplateSpecializationType *T 2071 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2072 if (T) 2073 return QualType(T, 0); 2074 2075 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2076 2077 ElaboratedTypeKeyword CanonKeyword = Keyword; 2078 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2079 2080 bool AnyNonCanonArgs = false; 2081 llvm::SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2082 for (unsigned I = 0; I != NumArgs; ++I) { 2083 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2084 if (!CanonArgs[I].structurallyEquals(Args[I])) 2085 AnyNonCanonArgs = true; 2086 } 2087 2088 QualType Canon; 2089 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2090 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2091 Name, NumArgs, 2092 CanonArgs.data()); 2093 2094 // Find the insert position again. 2095 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2096 } 2097 2098 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2099 sizeof(TemplateArgument) * NumArgs), 2100 TypeAlignment); 2101 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2102 Name, NumArgs, Args, Canon); 2103 Types.push_back(T); 2104 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2105 return QualType(T, 0); 2106} 2107 2108/// CmpProtocolNames - Comparison predicate for sorting protocols 2109/// alphabetically. 2110static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2111 const ObjCProtocolDecl *RHS) { 2112 return LHS->getDeclName() < RHS->getDeclName(); 2113} 2114 2115static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2116 unsigned NumProtocols) { 2117 if (NumProtocols == 0) return true; 2118 2119 for (unsigned i = 1; i != NumProtocols; ++i) 2120 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2121 return false; 2122 return true; 2123} 2124 2125static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2126 unsigned &NumProtocols) { 2127 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2128 2129 // Sort protocols, keyed by name. 2130 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2131 2132 // Remove duplicates. 2133 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2134 NumProtocols = ProtocolsEnd-Protocols; 2135} 2136 2137QualType ASTContext::getObjCObjectType(QualType BaseType, 2138 ObjCProtocolDecl * const *Protocols, 2139 unsigned NumProtocols) { 2140 // If the base type is an interface and there aren't any protocols 2141 // to add, then the interface type will do just fine. 2142 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2143 return BaseType; 2144 2145 // Look in the folding set for an existing type. 2146 llvm::FoldingSetNodeID ID; 2147 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2148 void *InsertPos = 0; 2149 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2150 return QualType(QT, 0); 2151 2152 // Build the canonical type, which has the canonical base type and 2153 // a sorted-and-uniqued list of protocols. 2154 QualType Canonical; 2155 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2156 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2157 if (!ProtocolsSorted) { 2158 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2159 Protocols + NumProtocols); 2160 unsigned UniqueCount = NumProtocols; 2161 2162 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2163 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2164 &Sorted[0], UniqueCount); 2165 } else { 2166 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2167 Protocols, NumProtocols); 2168 } 2169 2170 // Regenerate InsertPos. 2171 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2172 } 2173 2174 unsigned Size = sizeof(ObjCObjectTypeImpl); 2175 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2176 void *Mem = Allocate(Size, TypeAlignment); 2177 ObjCObjectTypeImpl *T = 2178 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2179 2180 Types.push_back(T); 2181 ObjCObjectTypes.InsertNode(T, InsertPos); 2182 return QualType(T, 0); 2183} 2184 2185/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2186/// the given object type. 2187QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) { 2188 llvm::FoldingSetNodeID ID; 2189 ObjCObjectPointerType::Profile(ID, ObjectT); 2190 2191 void *InsertPos = 0; 2192 if (ObjCObjectPointerType *QT = 2193 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2194 return QualType(QT, 0); 2195 2196 // Find the canonical object type. 2197 QualType Canonical; 2198 if (!ObjectT.isCanonical()) { 2199 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2200 2201 // Regenerate InsertPos. 2202 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2203 } 2204 2205 // No match. 2206 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2207 ObjCObjectPointerType *QType = 2208 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2209 2210 Types.push_back(QType); 2211 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2212 return QualType(QType, 0); 2213} 2214 2215/// getObjCInterfaceType - Return the unique reference to the type for the 2216/// specified ObjC interface decl. The list of protocols is optional. 2217QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) { 2218 if (Decl->TypeForDecl) 2219 return QualType(Decl->TypeForDecl, 0); 2220 2221 // FIXME: redeclarations? 2222 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2223 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2224 Decl->TypeForDecl = T; 2225 Types.push_back(T); 2226 return QualType(T, 0); 2227} 2228 2229/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2230/// TypeOfExprType AST's (since expression's are never shared). For example, 2231/// multiple declarations that refer to "typeof(x)" all contain different 2232/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2233/// on canonical type's (which are always unique). 2234QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2235 TypeOfExprType *toe; 2236 if (tofExpr->isTypeDependent()) { 2237 llvm::FoldingSetNodeID ID; 2238 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2239 2240 void *InsertPos = 0; 2241 DependentTypeOfExprType *Canon 2242 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2243 if (Canon) { 2244 // We already have a "canonical" version of an identical, dependent 2245 // typeof(expr) type. Use that as our canonical type. 2246 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2247 QualType((TypeOfExprType*)Canon, 0)); 2248 } 2249 else { 2250 // Build a new, canonical typeof(expr) type. 2251 Canon 2252 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2253 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2254 toe = Canon; 2255 } 2256 } else { 2257 QualType Canonical = getCanonicalType(tofExpr->getType()); 2258 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2259 } 2260 Types.push_back(toe); 2261 return QualType(toe, 0); 2262} 2263 2264/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2265/// TypeOfType AST's. The only motivation to unique these nodes would be 2266/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2267/// an issue. This doesn't effect the type checker, since it operates 2268/// on canonical type's (which are always unique). 2269QualType ASTContext::getTypeOfType(QualType tofType) { 2270 QualType Canonical = getCanonicalType(tofType); 2271 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2272 Types.push_back(tot); 2273 return QualType(tot, 0); 2274} 2275 2276/// getDecltypeForExpr - Given an expr, will return the decltype for that 2277/// expression, according to the rules in C++0x [dcl.type.simple]p4 2278static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2279 if (e->isTypeDependent()) 2280 return Context.DependentTy; 2281 2282 // If e is an id expression or a class member access, decltype(e) is defined 2283 // as the type of the entity named by e. 2284 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2285 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2286 return VD->getType(); 2287 } 2288 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2289 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2290 return FD->getType(); 2291 } 2292 // If e is a function call or an invocation of an overloaded operator, 2293 // (parentheses around e are ignored), decltype(e) is defined as the 2294 // return type of that function. 2295 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2296 return CE->getCallReturnType(); 2297 2298 QualType T = e->getType(); 2299 2300 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2301 // defined as T&, otherwise decltype(e) is defined as T. 2302 if (e->isLvalue(Context) == Expr::LV_Valid) 2303 T = Context.getLValueReferenceType(T); 2304 2305 return T; 2306} 2307 2308/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2309/// DecltypeType AST's. The only motivation to unique these nodes would be 2310/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2311/// an issue. This doesn't effect the type checker, since it operates 2312/// on canonical type's (which are always unique). 2313QualType ASTContext::getDecltypeType(Expr *e) { 2314 DecltypeType *dt; 2315 if (e->isTypeDependent()) { 2316 llvm::FoldingSetNodeID ID; 2317 DependentDecltypeType::Profile(ID, *this, e); 2318 2319 void *InsertPos = 0; 2320 DependentDecltypeType *Canon 2321 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2322 if (Canon) { 2323 // We already have a "canonical" version of an equivalent, dependent 2324 // decltype type. Use that as our canonical type. 2325 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2326 QualType((DecltypeType*)Canon, 0)); 2327 } 2328 else { 2329 // Build a new, canonical typeof(expr) type. 2330 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2331 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2332 dt = Canon; 2333 } 2334 } else { 2335 QualType T = getDecltypeForExpr(e, *this); 2336 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2337 } 2338 Types.push_back(dt); 2339 return QualType(dt, 0); 2340} 2341 2342/// getTagDeclType - Return the unique reference to the type for the 2343/// specified TagDecl (struct/union/class/enum) decl. 2344QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2345 assert (Decl); 2346 // FIXME: What is the design on getTagDeclType when it requires casting 2347 // away const? mutable? 2348 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2349} 2350 2351/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2352/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2353/// needs to agree with the definition in <stddef.h>. 2354CanQualType ASTContext::getSizeType() const { 2355 return getFromTargetType(Target.getSizeType()); 2356} 2357 2358/// getSignedWCharType - Return the type of "signed wchar_t". 2359/// Used when in C++, as a GCC extension. 2360QualType ASTContext::getSignedWCharType() const { 2361 // FIXME: derive from "Target" ? 2362 return WCharTy; 2363} 2364 2365/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2366/// Used when in C++, as a GCC extension. 2367QualType ASTContext::getUnsignedWCharType() const { 2368 // FIXME: derive from "Target" ? 2369 return UnsignedIntTy; 2370} 2371 2372/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2373/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2374QualType ASTContext::getPointerDiffType() const { 2375 return getFromTargetType(Target.getPtrDiffType(0)); 2376} 2377 2378//===----------------------------------------------------------------------===// 2379// Type Operators 2380//===----------------------------------------------------------------------===// 2381 2382CanQualType ASTContext::getCanonicalParamType(QualType T) { 2383 // Push qualifiers into arrays, and then discard any remaining 2384 // qualifiers. 2385 T = getCanonicalType(T); 2386 const Type *Ty = T.getTypePtr(); 2387 2388 QualType Result; 2389 if (isa<ArrayType>(Ty)) { 2390 Result = getArrayDecayedType(QualType(Ty,0)); 2391 } else if (isa<FunctionType>(Ty)) { 2392 Result = getPointerType(QualType(Ty, 0)); 2393 } else { 2394 Result = QualType(Ty, 0); 2395 } 2396 2397 return CanQualType::CreateUnsafe(Result); 2398} 2399 2400/// getCanonicalType - Return the canonical (structural) type corresponding to 2401/// the specified potentially non-canonical type. The non-canonical version 2402/// of a type may have many "decorated" versions of types. Decorators can 2403/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2404/// to be free of any of these, allowing two canonical types to be compared 2405/// for exact equality with a simple pointer comparison. 2406CanQualType ASTContext::getCanonicalType(QualType T) { 2407 QualifierCollector Quals; 2408 const Type *Ptr = Quals.strip(T); 2409 QualType CanType = Ptr->getCanonicalTypeInternal(); 2410 2411 // The canonical internal type will be the canonical type *except* 2412 // that we push type qualifiers down through array types. 2413 2414 // If there are no new qualifiers to push down, stop here. 2415 if (!Quals.hasQualifiers()) 2416 return CanQualType::CreateUnsafe(CanType); 2417 2418 // If the type qualifiers are on an array type, get the canonical 2419 // type of the array with the qualifiers applied to the element 2420 // type. 2421 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2422 if (!AT) 2423 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2424 2425 // Get the canonical version of the element with the extra qualifiers on it. 2426 // This can recursively sink qualifiers through multiple levels of arrays. 2427 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2428 NewEltTy = getCanonicalType(NewEltTy); 2429 2430 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2431 return CanQualType::CreateUnsafe( 2432 getConstantArrayType(NewEltTy, CAT->getSize(), 2433 CAT->getSizeModifier(), 2434 CAT->getIndexTypeCVRQualifiers())); 2435 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2436 return CanQualType::CreateUnsafe( 2437 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2438 IAT->getIndexTypeCVRQualifiers())); 2439 2440 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2441 return CanQualType::CreateUnsafe( 2442 getDependentSizedArrayType(NewEltTy, 2443 DSAT->getSizeExpr() ? 2444 DSAT->getSizeExpr()->Retain() : 0, 2445 DSAT->getSizeModifier(), 2446 DSAT->getIndexTypeCVRQualifiers(), 2447 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2448 2449 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2450 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2451 VAT->getSizeExpr() ? 2452 VAT->getSizeExpr()->Retain() : 0, 2453 VAT->getSizeModifier(), 2454 VAT->getIndexTypeCVRQualifiers(), 2455 VAT->getBracketsRange())); 2456} 2457 2458QualType ASTContext::getUnqualifiedArrayType(QualType T, 2459 Qualifiers &Quals) { 2460 Quals = T.getQualifiers(); 2461 const ArrayType *AT = getAsArrayType(T); 2462 if (!AT) { 2463 return T.getUnqualifiedType(); 2464 } 2465 2466 QualType Elt = AT->getElementType(); 2467 QualType UnqualElt = getUnqualifiedArrayType(Elt, Quals); 2468 if (Elt == UnqualElt) 2469 return T; 2470 2471 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 2472 return getConstantArrayType(UnqualElt, CAT->getSize(), 2473 CAT->getSizeModifier(), 0); 2474 } 2475 2476 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 2477 return getIncompleteArrayType(UnqualElt, IAT->getSizeModifier(), 0); 2478 } 2479 2480 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 2481 return getVariableArrayType(UnqualElt, 2482 VAT->getSizeExpr() ? 2483 VAT->getSizeExpr()->Retain() : 0, 2484 VAT->getSizeModifier(), 2485 VAT->getIndexTypeCVRQualifiers(), 2486 VAT->getBracketsRange()); 2487 } 2488 2489 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 2490 return getDependentSizedArrayType(UnqualElt, DSAT->getSizeExpr()->Retain(), 2491 DSAT->getSizeModifier(), 0, 2492 SourceRange()); 2493} 2494 2495/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 2496/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 2497/// they point to and return true. If T1 and T2 aren't pointer types 2498/// or pointer-to-member types, or if they are not similar at this 2499/// level, returns false and leaves T1 and T2 unchanged. Top-level 2500/// qualifiers on T1 and T2 are ignored. This function will typically 2501/// be called in a loop that successively "unwraps" pointer and 2502/// pointer-to-member types to compare them at each level. 2503bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 2504 const PointerType *T1PtrType = T1->getAs<PointerType>(), 2505 *T2PtrType = T2->getAs<PointerType>(); 2506 if (T1PtrType && T2PtrType) { 2507 T1 = T1PtrType->getPointeeType(); 2508 T2 = T2PtrType->getPointeeType(); 2509 return true; 2510 } 2511 2512 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 2513 *T2MPType = T2->getAs<MemberPointerType>(); 2514 if (T1MPType && T2MPType && 2515 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 2516 QualType(T2MPType->getClass(), 0))) { 2517 T1 = T1MPType->getPointeeType(); 2518 T2 = T2MPType->getPointeeType(); 2519 return true; 2520 } 2521 2522 if (getLangOptions().ObjC1) { 2523 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 2524 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 2525 if (T1OPType && T2OPType) { 2526 T1 = T1OPType->getPointeeType(); 2527 T2 = T2OPType->getPointeeType(); 2528 return true; 2529 } 2530 } 2531 2532 // FIXME: Block pointers, too? 2533 2534 return false; 2535} 2536 2537DeclarationName ASTContext::getNameForTemplate(TemplateName Name) { 2538 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2539 return TD->getDeclName(); 2540 2541 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2542 if (DTN->isIdentifier()) { 2543 return DeclarationNames.getIdentifier(DTN->getIdentifier()); 2544 } else { 2545 return DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2546 } 2547 } 2548 2549 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2550 assert(Storage); 2551 return (*Storage->begin())->getDeclName(); 2552} 2553 2554TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2555 if (TemplateDecl *Template = Name.getAsTemplateDecl()) { 2556 if (TemplateTemplateParmDecl *TTP 2557 = dyn_cast<TemplateTemplateParmDecl>(Template)) 2558 Template = getCanonicalTemplateTemplateParmDecl(TTP); 2559 2560 // The canonical template name is the canonical template declaration. 2561 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2562 } 2563 2564 assert(!Name.getAsOverloadedTemplate()); 2565 2566 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2567 assert(DTN && "Non-dependent template names must refer to template decls."); 2568 return DTN->CanonicalTemplateName; 2569} 2570 2571bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2572 X = getCanonicalTemplateName(X); 2573 Y = getCanonicalTemplateName(Y); 2574 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2575} 2576 2577TemplateArgument 2578ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2579 switch (Arg.getKind()) { 2580 case TemplateArgument::Null: 2581 return Arg; 2582 2583 case TemplateArgument::Expression: 2584 return Arg; 2585 2586 case TemplateArgument::Declaration: 2587 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2588 2589 case TemplateArgument::Template: 2590 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2591 2592 case TemplateArgument::Integral: 2593 return TemplateArgument(*Arg.getAsIntegral(), 2594 getCanonicalType(Arg.getIntegralType())); 2595 2596 case TemplateArgument::Type: 2597 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2598 2599 case TemplateArgument::Pack: { 2600 // FIXME: Allocate in ASTContext 2601 TemplateArgument *CanonArgs = new TemplateArgument[Arg.pack_size()]; 2602 unsigned Idx = 0; 2603 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2604 AEnd = Arg.pack_end(); 2605 A != AEnd; (void)++A, ++Idx) 2606 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2607 2608 TemplateArgument Result; 2609 Result.setArgumentPack(CanonArgs, Arg.pack_size(), false); 2610 return Result; 2611 } 2612 } 2613 2614 // Silence GCC warning 2615 assert(false && "Unhandled template argument kind"); 2616 return TemplateArgument(); 2617} 2618 2619NestedNameSpecifier * 2620ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2621 if (!NNS) 2622 return 0; 2623 2624 switch (NNS->getKind()) { 2625 case NestedNameSpecifier::Identifier: 2626 // Canonicalize the prefix but keep the identifier the same. 2627 return NestedNameSpecifier::Create(*this, 2628 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2629 NNS->getAsIdentifier()); 2630 2631 case NestedNameSpecifier::Namespace: 2632 // A namespace is canonical; build a nested-name-specifier with 2633 // this namespace and no prefix. 2634 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2635 2636 case NestedNameSpecifier::TypeSpec: 2637 case NestedNameSpecifier::TypeSpecWithTemplate: { 2638 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2639 return NestedNameSpecifier::Create(*this, 0, 2640 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2641 T.getTypePtr()); 2642 } 2643 2644 case NestedNameSpecifier::Global: 2645 // The global specifier is canonical and unique. 2646 return NNS; 2647 } 2648 2649 // Required to silence a GCC warning 2650 return 0; 2651} 2652 2653 2654const ArrayType *ASTContext::getAsArrayType(QualType T) { 2655 // Handle the non-qualified case efficiently. 2656 if (!T.hasLocalQualifiers()) { 2657 // Handle the common positive case fast. 2658 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2659 return AT; 2660 } 2661 2662 // Handle the common negative case fast. 2663 QualType CType = T->getCanonicalTypeInternal(); 2664 if (!isa<ArrayType>(CType)) 2665 return 0; 2666 2667 // Apply any qualifiers from the array type to the element type. This 2668 // implements C99 6.7.3p8: "If the specification of an array type includes 2669 // any type qualifiers, the element type is so qualified, not the array type." 2670 2671 // If we get here, we either have type qualifiers on the type, or we have 2672 // sugar such as a typedef in the way. If we have type qualifiers on the type 2673 // we must propagate them down into the element type. 2674 2675 QualifierCollector Qs; 2676 const Type *Ty = Qs.strip(T.getDesugaredType()); 2677 2678 // If we have a simple case, just return now. 2679 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2680 if (ATy == 0 || Qs.empty()) 2681 return ATy; 2682 2683 // Otherwise, we have an array and we have qualifiers on it. Push the 2684 // qualifiers into the array element type and return a new array type. 2685 // Get the canonical version of the element with the extra qualifiers on it. 2686 // This can recursively sink qualifiers through multiple levels of arrays. 2687 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2688 2689 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2690 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2691 CAT->getSizeModifier(), 2692 CAT->getIndexTypeCVRQualifiers())); 2693 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2694 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2695 IAT->getSizeModifier(), 2696 IAT->getIndexTypeCVRQualifiers())); 2697 2698 if (const DependentSizedArrayType *DSAT 2699 = dyn_cast<DependentSizedArrayType>(ATy)) 2700 return cast<ArrayType>( 2701 getDependentSizedArrayType(NewEltTy, 2702 DSAT->getSizeExpr() ? 2703 DSAT->getSizeExpr()->Retain() : 0, 2704 DSAT->getSizeModifier(), 2705 DSAT->getIndexTypeCVRQualifiers(), 2706 DSAT->getBracketsRange())); 2707 2708 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2709 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2710 VAT->getSizeExpr() ? 2711 VAT->getSizeExpr()->Retain() : 0, 2712 VAT->getSizeModifier(), 2713 VAT->getIndexTypeCVRQualifiers(), 2714 VAT->getBracketsRange())); 2715} 2716 2717 2718/// getArrayDecayedType - Return the properly qualified result of decaying the 2719/// specified array type to a pointer. This operation is non-trivial when 2720/// handling typedefs etc. The canonical type of "T" must be an array type, 2721/// this returns a pointer to a properly qualified element of the array. 2722/// 2723/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2724QualType ASTContext::getArrayDecayedType(QualType Ty) { 2725 // Get the element type with 'getAsArrayType' so that we don't lose any 2726 // typedefs in the element type of the array. This also handles propagation 2727 // of type qualifiers from the array type into the element type if present 2728 // (C99 6.7.3p8). 2729 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2730 assert(PrettyArrayType && "Not an array type!"); 2731 2732 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2733 2734 // int x[restrict 4] -> int *restrict 2735 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2736} 2737 2738QualType ASTContext::getBaseElementType(QualType QT) { 2739 QualifierCollector Qs; 2740 while (const ArrayType *AT = getAsArrayType(QualType(Qs.strip(QT), 0))) 2741 QT = AT->getElementType(); 2742 return Qs.apply(QT); 2743} 2744 2745QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2746 QualType ElemTy = AT->getElementType(); 2747 2748 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2749 return getBaseElementType(AT); 2750 2751 return ElemTy; 2752} 2753 2754/// getConstantArrayElementCount - Returns number of constant array elements. 2755uint64_t 2756ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2757 uint64_t ElementCount = 1; 2758 do { 2759 ElementCount *= CA->getSize().getZExtValue(); 2760 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2761 } while (CA); 2762 return ElementCount; 2763} 2764 2765/// getFloatingRank - Return a relative rank for floating point types. 2766/// This routine will assert if passed a built-in type that isn't a float. 2767static FloatingRank getFloatingRank(QualType T) { 2768 if (const ComplexType *CT = T->getAs<ComplexType>()) 2769 return getFloatingRank(CT->getElementType()); 2770 2771 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2772 switch (T->getAs<BuiltinType>()->getKind()) { 2773 default: assert(0 && "getFloatingRank(): not a floating type"); 2774 case BuiltinType::Float: return FloatRank; 2775 case BuiltinType::Double: return DoubleRank; 2776 case BuiltinType::LongDouble: return LongDoubleRank; 2777 } 2778} 2779 2780/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2781/// point or a complex type (based on typeDomain/typeSize). 2782/// 'typeDomain' is a real floating point or complex type. 2783/// 'typeSize' is a real floating point or complex type. 2784QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2785 QualType Domain) const { 2786 FloatingRank EltRank = getFloatingRank(Size); 2787 if (Domain->isComplexType()) { 2788 switch (EltRank) { 2789 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2790 case FloatRank: return FloatComplexTy; 2791 case DoubleRank: return DoubleComplexTy; 2792 case LongDoubleRank: return LongDoubleComplexTy; 2793 } 2794 } 2795 2796 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2797 switch (EltRank) { 2798 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2799 case FloatRank: return FloatTy; 2800 case DoubleRank: return DoubleTy; 2801 case LongDoubleRank: return LongDoubleTy; 2802 } 2803} 2804 2805/// getFloatingTypeOrder - Compare the rank of the two specified floating 2806/// point types, ignoring the domain of the type (i.e. 'double' == 2807/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2808/// LHS < RHS, return -1. 2809int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2810 FloatingRank LHSR = getFloatingRank(LHS); 2811 FloatingRank RHSR = getFloatingRank(RHS); 2812 2813 if (LHSR == RHSR) 2814 return 0; 2815 if (LHSR > RHSR) 2816 return 1; 2817 return -1; 2818} 2819 2820/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2821/// routine will assert if passed a built-in type that isn't an integer or enum, 2822/// or if it is not canonicalized. 2823unsigned ASTContext::getIntegerRank(Type *T) { 2824 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2825 if (EnumType* ET = dyn_cast<EnumType>(T)) 2826 T = ET->getDecl()->getPromotionType().getTypePtr(); 2827 2828 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2829 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2830 2831 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2832 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2833 2834 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2835 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2836 2837 switch (cast<BuiltinType>(T)->getKind()) { 2838 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2839 case BuiltinType::Bool: 2840 return 1 + (getIntWidth(BoolTy) << 3); 2841 case BuiltinType::Char_S: 2842 case BuiltinType::Char_U: 2843 case BuiltinType::SChar: 2844 case BuiltinType::UChar: 2845 return 2 + (getIntWidth(CharTy) << 3); 2846 case BuiltinType::Short: 2847 case BuiltinType::UShort: 2848 return 3 + (getIntWidth(ShortTy) << 3); 2849 case BuiltinType::Int: 2850 case BuiltinType::UInt: 2851 return 4 + (getIntWidth(IntTy) << 3); 2852 case BuiltinType::Long: 2853 case BuiltinType::ULong: 2854 return 5 + (getIntWidth(LongTy) << 3); 2855 case BuiltinType::LongLong: 2856 case BuiltinType::ULongLong: 2857 return 6 + (getIntWidth(LongLongTy) << 3); 2858 case BuiltinType::Int128: 2859 case BuiltinType::UInt128: 2860 return 7 + (getIntWidth(Int128Ty) << 3); 2861 } 2862} 2863 2864/// \brief Whether this is a promotable bitfield reference according 2865/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 2866/// 2867/// \returns the type this bit-field will promote to, or NULL if no 2868/// promotion occurs. 2869QualType ASTContext::isPromotableBitField(Expr *E) { 2870 if (E->isTypeDependent() || E->isValueDependent()) 2871 return QualType(); 2872 2873 FieldDecl *Field = E->getBitField(); 2874 if (!Field) 2875 return QualType(); 2876 2877 QualType FT = Field->getType(); 2878 2879 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 2880 uint64_t BitWidth = BitWidthAP.getZExtValue(); 2881 uint64_t IntSize = getTypeSize(IntTy); 2882 // GCC extension compatibility: if the bit-field size is less than or equal 2883 // to the size of int, it gets promoted no matter what its type is. 2884 // For instance, unsigned long bf : 4 gets promoted to signed int. 2885 if (BitWidth < IntSize) 2886 return IntTy; 2887 2888 if (BitWidth == IntSize) 2889 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 2890 2891 // Types bigger than int are not subject to promotions, and therefore act 2892 // like the base type. 2893 // FIXME: This doesn't quite match what gcc does, but what gcc does here 2894 // is ridiculous. 2895 return QualType(); 2896} 2897 2898/// getPromotedIntegerType - Returns the type that Promotable will 2899/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 2900/// integer type. 2901QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 2902 assert(!Promotable.isNull()); 2903 assert(Promotable->isPromotableIntegerType()); 2904 if (const EnumType *ET = Promotable->getAs<EnumType>()) 2905 return ET->getDecl()->getPromotionType(); 2906 if (Promotable->isSignedIntegerType()) 2907 return IntTy; 2908 uint64_t PromotableSize = getTypeSize(Promotable); 2909 uint64_t IntSize = getTypeSize(IntTy); 2910 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 2911 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 2912} 2913 2914/// getIntegerTypeOrder - Returns the highest ranked integer type: 2915/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2916/// LHS < RHS, return -1. 2917int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2918 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2919 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2920 if (LHSC == RHSC) return 0; 2921 2922 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2923 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2924 2925 unsigned LHSRank = getIntegerRank(LHSC); 2926 unsigned RHSRank = getIntegerRank(RHSC); 2927 2928 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2929 if (LHSRank == RHSRank) return 0; 2930 return LHSRank > RHSRank ? 1 : -1; 2931 } 2932 2933 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2934 if (LHSUnsigned) { 2935 // If the unsigned [LHS] type is larger, return it. 2936 if (LHSRank >= RHSRank) 2937 return 1; 2938 2939 // If the signed type can represent all values of the unsigned type, it 2940 // wins. Because we are dealing with 2's complement and types that are 2941 // powers of two larger than each other, this is always safe. 2942 return -1; 2943 } 2944 2945 // If the unsigned [RHS] type is larger, return it. 2946 if (RHSRank >= LHSRank) 2947 return -1; 2948 2949 // If the signed type can represent all values of the unsigned type, it 2950 // wins. Because we are dealing with 2's complement and types that are 2951 // powers of two larger than each other, this is always safe. 2952 return 1; 2953} 2954 2955static RecordDecl * 2956CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 2957 SourceLocation L, IdentifierInfo *Id) { 2958 if (Ctx.getLangOptions().CPlusPlus) 2959 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 2960 else 2961 return RecordDecl::Create(Ctx, TK, DC, L, Id); 2962} 2963 2964// getCFConstantStringType - Return the type used for constant CFStrings. 2965QualType ASTContext::getCFConstantStringType() { 2966 if (!CFConstantStringTypeDecl) { 2967 CFConstantStringTypeDecl = 2968 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2969 &Idents.get("NSConstantString")); 2970 CFConstantStringTypeDecl->startDefinition(); 2971 2972 QualType FieldTypes[4]; 2973 2974 // const int *isa; 2975 FieldTypes[0] = getPointerType(IntTy.withConst()); 2976 // int flags; 2977 FieldTypes[1] = IntTy; 2978 // const char *str; 2979 FieldTypes[2] = getPointerType(CharTy.withConst()); 2980 // long length; 2981 FieldTypes[3] = LongTy; 2982 2983 // Create fields 2984 for (unsigned i = 0; i < 4; ++i) { 2985 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2986 SourceLocation(), 0, 2987 FieldTypes[i], /*TInfo=*/0, 2988 /*BitWidth=*/0, 2989 /*Mutable=*/false); 2990 Field->setAccess(AS_public); 2991 CFConstantStringTypeDecl->addDecl(Field); 2992 } 2993 2994 CFConstantStringTypeDecl->completeDefinition(); 2995 } 2996 2997 return getTagDeclType(CFConstantStringTypeDecl); 2998} 2999 3000void ASTContext::setCFConstantStringType(QualType T) { 3001 const RecordType *Rec = T->getAs<RecordType>(); 3002 assert(Rec && "Invalid CFConstantStringType"); 3003 CFConstantStringTypeDecl = Rec->getDecl(); 3004} 3005 3006// getNSConstantStringType - Return the type used for constant NSStrings. 3007QualType ASTContext::getNSConstantStringType() { 3008 if (!NSConstantStringTypeDecl) { 3009 NSConstantStringTypeDecl = 3010 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3011 &Idents.get("__builtin_NSString")); 3012 NSConstantStringTypeDecl->startDefinition(); 3013 3014 QualType FieldTypes[3]; 3015 3016 // const int *isa; 3017 FieldTypes[0] = getPointerType(IntTy.withConst()); 3018 // const char *str; 3019 FieldTypes[1] = getPointerType(CharTy.withConst()); 3020 // unsigned int length; 3021 FieldTypes[2] = UnsignedIntTy; 3022 3023 // Create fields 3024 for (unsigned i = 0; i < 3; ++i) { 3025 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 3026 SourceLocation(), 0, 3027 FieldTypes[i], /*TInfo=*/0, 3028 /*BitWidth=*/0, 3029 /*Mutable=*/false); 3030 Field->setAccess(AS_public); 3031 NSConstantStringTypeDecl->addDecl(Field); 3032 } 3033 3034 NSConstantStringTypeDecl->completeDefinition(); 3035 } 3036 3037 return getTagDeclType(NSConstantStringTypeDecl); 3038} 3039 3040void ASTContext::setNSConstantStringType(QualType T) { 3041 const RecordType *Rec = T->getAs<RecordType>(); 3042 assert(Rec && "Invalid NSConstantStringType"); 3043 NSConstantStringTypeDecl = Rec->getDecl(); 3044} 3045 3046QualType ASTContext::getObjCFastEnumerationStateType() { 3047 if (!ObjCFastEnumerationStateTypeDecl) { 3048 ObjCFastEnumerationStateTypeDecl = 3049 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3050 &Idents.get("__objcFastEnumerationState")); 3051 ObjCFastEnumerationStateTypeDecl->startDefinition(); 3052 3053 QualType FieldTypes[] = { 3054 UnsignedLongTy, 3055 getPointerType(ObjCIdTypedefType), 3056 getPointerType(UnsignedLongTy), 3057 getConstantArrayType(UnsignedLongTy, 3058 llvm::APInt(32, 5), ArrayType::Normal, 0) 3059 }; 3060 3061 for (size_t i = 0; i < 4; ++i) { 3062 FieldDecl *Field = FieldDecl::Create(*this, 3063 ObjCFastEnumerationStateTypeDecl, 3064 SourceLocation(), 0, 3065 FieldTypes[i], /*TInfo=*/0, 3066 /*BitWidth=*/0, 3067 /*Mutable=*/false); 3068 Field->setAccess(AS_public); 3069 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 3070 } 3071 if (getLangOptions().CPlusPlus) 3072 if (CXXRecordDecl *CXXRD = 3073 dyn_cast<CXXRecordDecl>(ObjCFastEnumerationStateTypeDecl)) 3074 CXXRD->setEmpty(false); 3075 3076 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 3077 } 3078 3079 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 3080} 3081 3082QualType ASTContext::getBlockDescriptorType() { 3083 if (BlockDescriptorType) 3084 return getTagDeclType(BlockDescriptorType); 3085 3086 RecordDecl *T; 3087 // FIXME: Needs the FlagAppleBlock bit. 3088 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3089 &Idents.get("__block_descriptor")); 3090 T->startDefinition(); 3091 3092 QualType FieldTypes[] = { 3093 UnsignedLongTy, 3094 UnsignedLongTy, 3095 }; 3096 3097 const char *FieldNames[] = { 3098 "reserved", 3099 "Size" 3100 }; 3101 3102 for (size_t i = 0; i < 2; ++i) { 3103 FieldDecl *Field = FieldDecl::Create(*this, 3104 T, 3105 SourceLocation(), 3106 &Idents.get(FieldNames[i]), 3107 FieldTypes[i], /*TInfo=*/0, 3108 /*BitWidth=*/0, 3109 /*Mutable=*/false); 3110 Field->setAccess(AS_public); 3111 T->addDecl(Field); 3112 } 3113 3114 T->completeDefinition(); 3115 3116 BlockDescriptorType = T; 3117 3118 return getTagDeclType(BlockDescriptorType); 3119} 3120 3121void ASTContext::setBlockDescriptorType(QualType T) { 3122 const RecordType *Rec = T->getAs<RecordType>(); 3123 assert(Rec && "Invalid BlockDescriptorType"); 3124 BlockDescriptorType = Rec->getDecl(); 3125} 3126 3127QualType ASTContext::getBlockDescriptorExtendedType() { 3128 if (BlockDescriptorExtendedType) 3129 return getTagDeclType(BlockDescriptorExtendedType); 3130 3131 RecordDecl *T; 3132 // FIXME: Needs the FlagAppleBlock bit. 3133 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3134 &Idents.get("__block_descriptor_withcopydispose")); 3135 T->startDefinition(); 3136 3137 QualType FieldTypes[] = { 3138 UnsignedLongTy, 3139 UnsignedLongTy, 3140 getPointerType(VoidPtrTy), 3141 getPointerType(VoidPtrTy) 3142 }; 3143 3144 const char *FieldNames[] = { 3145 "reserved", 3146 "Size", 3147 "CopyFuncPtr", 3148 "DestroyFuncPtr" 3149 }; 3150 3151 for (size_t i = 0; i < 4; ++i) { 3152 FieldDecl *Field = FieldDecl::Create(*this, 3153 T, 3154 SourceLocation(), 3155 &Idents.get(FieldNames[i]), 3156 FieldTypes[i], /*TInfo=*/0, 3157 /*BitWidth=*/0, 3158 /*Mutable=*/false); 3159 Field->setAccess(AS_public); 3160 T->addDecl(Field); 3161 } 3162 3163 T->completeDefinition(); 3164 3165 BlockDescriptorExtendedType = T; 3166 3167 return getTagDeclType(BlockDescriptorExtendedType); 3168} 3169 3170void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3171 const RecordType *Rec = T->getAs<RecordType>(); 3172 assert(Rec && "Invalid BlockDescriptorType"); 3173 BlockDescriptorExtendedType = Rec->getDecl(); 3174} 3175 3176bool ASTContext::BlockRequiresCopying(QualType Ty) { 3177 if (Ty->isBlockPointerType()) 3178 return true; 3179 if (isObjCNSObjectType(Ty)) 3180 return true; 3181 if (Ty->isObjCObjectPointerType()) 3182 return true; 3183 return false; 3184} 3185 3186QualType ASTContext::BuildByRefType(const char *DeclName, QualType Ty) { 3187 // type = struct __Block_byref_1_X { 3188 // void *__isa; 3189 // struct __Block_byref_1_X *__forwarding; 3190 // unsigned int __flags; 3191 // unsigned int __size; 3192 // void *__copy_helper; // as needed 3193 // void *__destroy_help // as needed 3194 // int X; 3195 // } * 3196 3197 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3198 3199 // FIXME: Move up 3200 llvm::SmallString<36> Name; 3201 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3202 ++UniqueBlockByRefTypeID << '_' << DeclName; 3203 RecordDecl *T; 3204 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3205 &Idents.get(Name.str())); 3206 T->startDefinition(); 3207 QualType Int32Ty = IntTy; 3208 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3209 QualType FieldTypes[] = { 3210 getPointerType(VoidPtrTy), 3211 getPointerType(getTagDeclType(T)), 3212 Int32Ty, 3213 Int32Ty, 3214 getPointerType(VoidPtrTy), 3215 getPointerType(VoidPtrTy), 3216 Ty 3217 }; 3218 3219 const char *FieldNames[] = { 3220 "__isa", 3221 "__forwarding", 3222 "__flags", 3223 "__size", 3224 "__copy_helper", 3225 "__destroy_helper", 3226 DeclName, 3227 }; 3228 3229 for (size_t i = 0; i < 7; ++i) { 3230 if (!HasCopyAndDispose && i >=4 && i <= 5) 3231 continue; 3232 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3233 &Idents.get(FieldNames[i]), 3234 FieldTypes[i], /*TInfo=*/0, 3235 /*BitWidth=*/0, /*Mutable=*/false); 3236 Field->setAccess(AS_public); 3237 T->addDecl(Field); 3238 } 3239 3240 T->completeDefinition(); 3241 3242 return getPointerType(getTagDeclType(T)); 3243} 3244 3245 3246QualType ASTContext::getBlockParmType( 3247 bool BlockHasCopyDispose, 3248 llvm::SmallVectorImpl<const Expr *> &Layout) { 3249 3250 // FIXME: Move up 3251 llvm::SmallString<36> Name; 3252 llvm::raw_svector_ostream(Name) << "__block_literal_" 3253 << ++UniqueBlockParmTypeID; 3254 RecordDecl *T; 3255 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3256 &Idents.get(Name.str())); 3257 T->startDefinition(); 3258 QualType FieldTypes[] = { 3259 getPointerType(VoidPtrTy), 3260 IntTy, 3261 IntTy, 3262 getPointerType(VoidPtrTy), 3263 (BlockHasCopyDispose ? 3264 getPointerType(getBlockDescriptorExtendedType()) : 3265 getPointerType(getBlockDescriptorType())) 3266 }; 3267 3268 const char *FieldNames[] = { 3269 "__isa", 3270 "__flags", 3271 "__reserved", 3272 "__FuncPtr", 3273 "__descriptor" 3274 }; 3275 3276 for (size_t i = 0; i < 5; ++i) { 3277 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3278 &Idents.get(FieldNames[i]), 3279 FieldTypes[i], /*TInfo=*/0, 3280 /*BitWidth=*/0, /*Mutable=*/false); 3281 Field->setAccess(AS_public); 3282 T->addDecl(Field); 3283 } 3284 3285 for (unsigned i = 0; i < Layout.size(); ++i) { 3286 const Expr *E = Layout[i]; 3287 3288 QualType FieldType = E->getType(); 3289 IdentifierInfo *FieldName = 0; 3290 if (isa<CXXThisExpr>(E)) { 3291 FieldName = &Idents.get("this"); 3292 } else if (const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E)) { 3293 const ValueDecl *D = BDRE->getDecl(); 3294 FieldName = D->getIdentifier(); 3295 if (BDRE->isByRef()) 3296 FieldType = BuildByRefType(D->getNameAsCString(), FieldType); 3297 } else { 3298 // Padding. 3299 assert(isa<ConstantArrayType>(FieldType) && 3300 isa<DeclRefExpr>(E) && 3301 !cast<DeclRefExpr>(E)->getDecl()->getDeclName() && 3302 "doesn't match characteristics of padding decl"); 3303 } 3304 3305 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3306 FieldName, FieldType, /*TInfo=*/0, 3307 /*BitWidth=*/0, /*Mutable=*/false); 3308 Field->setAccess(AS_public); 3309 T->addDecl(Field); 3310 } 3311 3312 T->completeDefinition(); 3313 3314 return getPointerType(getTagDeclType(T)); 3315} 3316 3317void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3318 const RecordType *Rec = T->getAs<RecordType>(); 3319 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3320 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3321} 3322 3323// This returns true if a type has been typedefed to BOOL: 3324// typedef <type> BOOL; 3325static bool isTypeTypedefedAsBOOL(QualType T) { 3326 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3327 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3328 return II->isStr("BOOL"); 3329 3330 return false; 3331} 3332 3333/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3334/// purpose. 3335CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) { 3336 CharUnits sz = getTypeSizeInChars(type); 3337 3338 // Make all integer and enum types at least as large as an int 3339 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 3340 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3341 // Treat arrays as pointers, since that's how they're passed in. 3342 else if (type->isArrayType()) 3343 sz = getTypeSizeInChars(VoidPtrTy); 3344 return sz; 3345} 3346 3347static inline 3348std::string charUnitsToString(const CharUnits &CU) { 3349 return llvm::itostr(CU.getQuantity()); 3350} 3351 3352/// getObjCEncodingForBlockDecl - Return the encoded type for this block 3353/// declaration. 3354void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3355 std::string& S) { 3356 const BlockDecl *Decl = Expr->getBlockDecl(); 3357 QualType BlockTy = 3358 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3359 // Encode result type. 3360 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3361 // Compute size of all parameters. 3362 // Start with computing size of a pointer in number of bytes. 3363 // FIXME: There might(should) be a better way of doing this computation! 3364 SourceLocation Loc; 3365 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3366 CharUnits ParmOffset = PtrSize; 3367 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3368 E = Decl->param_end(); PI != E; ++PI) { 3369 QualType PType = (*PI)->getType(); 3370 CharUnits sz = getObjCEncodingTypeSize(PType); 3371 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3372 ParmOffset += sz; 3373 } 3374 // Size of the argument frame 3375 S += charUnitsToString(ParmOffset); 3376 // Block pointer and offset. 3377 S += "@?0"; 3378 ParmOffset = PtrSize; 3379 3380 // Argument types. 3381 ParmOffset = PtrSize; 3382 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3383 Decl->param_end(); PI != E; ++PI) { 3384 ParmVarDecl *PVDecl = *PI; 3385 QualType PType = PVDecl->getOriginalType(); 3386 if (const ArrayType *AT = 3387 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3388 // Use array's original type only if it has known number of 3389 // elements. 3390 if (!isa<ConstantArrayType>(AT)) 3391 PType = PVDecl->getType(); 3392 } else if (PType->isFunctionType()) 3393 PType = PVDecl->getType(); 3394 getObjCEncodingForType(PType, S); 3395 S += charUnitsToString(ParmOffset); 3396 ParmOffset += getObjCEncodingTypeSize(PType); 3397 } 3398} 3399 3400/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3401/// declaration. 3402void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3403 std::string& S) { 3404 // FIXME: This is not very efficient. 3405 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3406 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3407 // Encode result type. 3408 getObjCEncodingForType(Decl->getResultType(), S); 3409 // Compute size of all parameters. 3410 // Start with computing size of a pointer in number of bytes. 3411 // FIXME: There might(should) be a better way of doing this computation! 3412 SourceLocation Loc; 3413 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3414 // The first two arguments (self and _cmd) are pointers; account for 3415 // their size. 3416 CharUnits ParmOffset = 2 * PtrSize; 3417 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3418 E = Decl->sel_param_end(); PI != E; ++PI) { 3419 QualType PType = (*PI)->getType(); 3420 CharUnits sz = getObjCEncodingTypeSize(PType); 3421 assert (sz.isPositive() && 3422 "getObjCEncodingForMethodDecl - Incomplete param type"); 3423 ParmOffset += sz; 3424 } 3425 S += charUnitsToString(ParmOffset); 3426 S += "@0:"; 3427 S += charUnitsToString(PtrSize); 3428 3429 // Argument types. 3430 ParmOffset = 2 * PtrSize; 3431 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3432 E = Decl->sel_param_end(); PI != E; ++PI) { 3433 ParmVarDecl *PVDecl = *PI; 3434 QualType PType = PVDecl->getOriginalType(); 3435 if (const ArrayType *AT = 3436 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3437 // Use array's original type only if it has known number of 3438 // elements. 3439 if (!isa<ConstantArrayType>(AT)) 3440 PType = PVDecl->getType(); 3441 } else if (PType->isFunctionType()) 3442 PType = PVDecl->getType(); 3443 // Process argument qualifiers for user supplied arguments; such as, 3444 // 'in', 'inout', etc. 3445 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3446 getObjCEncodingForType(PType, S); 3447 S += charUnitsToString(ParmOffset); 3448 ParmOffset += getObjCEncodingTypeSize(PType); 3449 } 3450} 3451 3452/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3453/// property declaration. If non-NULL, Container must be either an 3454/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3455/// NULL when getting encodings for protocol properties. 3456/// Property attributes are stored as a comma-delimited C string. The simple 3457/// attributes readonly and bycopy are encoded as single characters. The 3458/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3459/// encoded as single characters, followed by an identifier. Property types 3460/// are also encoded as a parametrized attribute. The characters used to encode 3461/// these attributes are defined by the following enumeration: 3462/// @code 3463/// enum PropertyAttributes { 3464/// kPropertyReadOnly = 'R', // property is read-only. 3465/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3466/// kPropertyByref = '&', // property is a reference to the value last assigned 3467/// kPropertyDynamic = 'D', // property is dynamic 3468/// kPropertyGetter = 'G', // followed by getter selector name 3469/// kPropertySetter = 'S', // followed by setter selector name 3470/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3471/// kPropertyType = 't' // followed by old-style type encoding. 3472/// kPropertyWeak = 'W' // 'weak' property 3473/// kPropertyStrong = 'P' // property GC'able 3474/// kPropertyNonAtomic = 'N' // property non-atomic 3475/// }; 3476/// @endcode 3477void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3478 const Decl *Container, 3479 std::string& S) { 3480 // Collect information from the property implementation decl(s). 3481 bool Dynamic = false; 3482 ObjCPropertyImplDecl *SynthesizePID = 0; 3483 3484 // FIXME: Duplicated code due to poor abstraction. 3485 if (Container) { 3486 if (const ObjCCategoryImplDecl *CID = 3487 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3488 for (ObjCCategoryImplDecl::propimpl_iterator 3489 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3490 i != e; ++i) { 3491 ObjCPropertyImplDecl *PID = *i; 3492 if (PID->getPropertyDecl() == PD) { 3493 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3494 Dynamic = true; 3495 } else { 3496 SynthesizePID = PID; 3497 } 3498 } 3499 } 3500 } else { 3501 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3502 for (ObjCCategoryImplDecl::propimpl_iterator 3503 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3504 i != e; ++i) { 3505 ObjCPropertyImplDecl *PID = *i; 3506 if (PID->getPropertyDecl() == PD) { 3507 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3508 Dynamic = true; 3509 } else { 3510 SynthesizePID = PID; 3511 } 3512 } 3513 } 3514 } 3515 } 3516 3517 // FIXME: This is not very efficient. 3518 S = "T"; 3519 3520 // Encode result type. 3521 // GCC has some special rules regarding encoding of properties which 3522 // closely resembles encoding of ivars. 3523 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3524 true /* outermost type */, 3525 true /* encoding for property */); 3526 3527 if (PD->isReadOnly()) { 3528 S += ",R"; 3529 } else { 3530 switch (PD->getSetterKind()) { 3531 case ObjCPropertyDecl::Assign: break; 3532 case ObjCPropertyDecl::Copy: S += ",C"; break; 3533 case ObjCPropertyDecl::Retain: S += ",&"; break; 3534 } 3535 } 3536 3537 // It really isn't clear at all what this means, since properties 3538 // are "dynamic by default". 3539 if (Dynamic) 3540 S += ",D"; 3541 3542 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3543 S += ",N"; 3544 3545 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3546 S += ",G"; 3547 S += PD->getGetterName().getAsString(); 3548 } 3549 3550 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3551 S += ",S"; 3552 S += PD->getSetterName().getAsString(); 3553 } 3554 3555 if (SynthesizePID) { 3556 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3557 S += ",V"; 3558 S += OID->getNameAsString(); 3559 } 3560 3561 // FIXME: OBJCGC: weak & strong 3562} 3563 3564/// getLegacyIntegralTypeEncoding - 3565/// Another legacy compatibility encoding: 32-bit longs are encoded as 3566/// 'l' or 'L' , but not always. For typedefs, we need to use 3567/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3568/// 3569void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3570 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3571 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3572 if (BT->getKind() == BuiltinType::ULong && 3573 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3574 PointeeTy = UnsignedIntTy; 3575 else 3576 if (BT->getKind() == BuiltinType::Long && 3577 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3578 PointeeTy = IntTy; 3579 } 3580 } 3581} 3582 3583void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3584 const FieldDecl *Field) { 3585 // We follow the behavior of gcc, expanding structures which are 3586 // directly pointed to, and expanding embedded structures. Note that 3587 // these rules are sufficient to prevent recursive encoding of the 3588 // same type. 3589 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3590 true /* outermost type */); 3591} 3592 3593static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 3594 switch (T->getAs<BuiltinType>()->getKind()) { 3595 default: assert(0 && "Unhandled builtin type kind"); 3596 case BuiltinType::Void: return 'v'; 3597 case BuiltinType::Bool: return 'B'; 3598 case BuiltinType::Char_U: 3599 case BuiltinType::UChar: return 'C'; 3600 case BuiltinType::UShort: return 'S'; 3601 case BuiltinType::UInt: return 'I'; 3602 case BuiltinType::ULong: 3603 return 3604 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3605 case BuiltinType::UInt128: return 'T'; 3606 case BuiltinType::ULongLong: return 'Q'; 3607 case BuiltinType::Char_S: 3608 case BuiltinType::SChar: return 'c'; 3609 case BuiltinType::Short: return 's'; 3610 case BuiltinType::WChar: 3611 case BuiltinType::Int: return 'i'; 3612 case BuiltinType::Long: 3613 return 3614 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'l' : 'q'; 3615 case BuiltinType::LongLong: return 'q'; 3616 case BuiltinType::Int128: return 't'; 3617 case BuiltinType::Float: return 'f'; 3618 case BuiltinType::Double: return 'd'; 3619 case BuiltinType::LongDouble: return 'd'; 3620 } 3621} 3622 3623static void EncodeBitField(const ASTContext *Context, std::string& S, 3624 QualType T, const FieldDecl *FD) { 3625 const Expr *E = FD->getBitWidth(); 3626 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3627 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3628 S += 'b'; 3629 // The NeXT runtime encodes bit fields as b followed by the number of bits. 3630 // The GNU runtime requires more information; bitfields are encoded as b, 3631 // then the offset (in bits) of the first element, then the type of the 3632 // bitfield, then the size in bits. For example, in this structure: 3633 // 3634 // struct 3635 // { 3636 // int integer; 3637 // int flags:2; 3638 // }; 3639 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 3640 // runtime, but b32i2 for the GNU runtime. The reason for this extra 3641 // information is not especially sensible, but we're stuck with it for 3642 // compatibility with GCC, although providing it breaks anything that 3643 // actually uses runtime introspection and wants to work on both runtimes... 3644 if (!Ctx->getLangOptions().NeXTRuntime) { 3645 const RecordDecl *RD = FD->getParent(); 3646 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 3647 // FIXME: This same linear search is also used in ExprConstant - it might 3648 // be better if the FieldDecl stored its offset. We'd be increasing the 3649 // size of the object slightly, but saving some time every time it is used. 3650 unsigned i = 0; 3651 for (RecordDecl::field_iterator Field = RD->field_begin(), 3652 FieldEnd = RD->field_end(); 3653 Field != FieldEnd; (void)++Field, ++i) { 3654 if (*Field == FD) 3655 break; 3656 } 3657 S += llvm::utostr(RL.getFieldOffset(i)); 3658 S += ObjCEncodingForPrimitiveKind(Context, T); 3659 } 3660 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3661 S += llvm::utostr(N); 3662} 3663 3664// FIXME: Use SmallString for accumulating string. 3665void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3666 bool ExpandPointedToStructures, 3667 bool ExpandStructures, 3668 const FieldDecl *FD, 3669 bool OutermostType, 3670 bool EncodingProperty) { 3671 if (T->getAs<BuiltinType>()) { 3672 if (FD && FD->isBitField()) 3673 return EncodeBitField(this, S, T, FD); 3674 S += ObjCEncodingForPrimitiveKind(this, T); 3675 return; 3676 } 3677 3678 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3679 S += 'j'; 3680 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3681 false); 3682 return; 3683 } 3684 3685 // encoding for pointer or r3eference types. 3686 QualType PointeeTy; 3687 if (const PointerType *PT = T->getAs<PointerType>()) { 3688 if (PT->isObjCSelType()) { 3689 S += ':'; 3690 return; 3691 } 3692 PointeeTy = PT->getPointeeType(); 3693 } 3694 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3695 PointeeTy = RT->getPointeeType(); 3696 if (!PointeeTy.isNull()) { 3697 bool isReadOnly = false; 3698 // For historical/compatibility reasons, the read-only qualifier of the 3699 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3700 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3701 // Also, do not emit the 'r' for anything but the outermost type! 3702 if (isa<TypedefType>(T.getTypePtr())) { 3703 if (OutermostType && T.isConstQualified()) { 3704 isReadOnly = true; 3705 S += 'r'; 3706 } 3707 } else if (OutermostType) { 3708 QualType P = PointeeTy; 3709 while (P->getAs<PointerType>()) 3710 P = P->getAs<PointerType>()->getPointeeType(); 3711 if (P.isConstQualified()) { 3712 isReadOnly = true; 3713 S += 'r'; 3714 } 3715 } 3716 if (isReadOnly) { 3717 // Another legacy compatibility encoding. Some ObjC qualifier and type 3718 // combinations need to be rearranged. 3719 // Rewrite "in const" from "nr" to "rn" 3720 if (llvm::StringRef(S).endswith("nr")) 3721 S.replace(S.end()-2, S.end(), "rn"); 3722 } 3723 3724 if (PointeeTy->isCharType()) { 3725 // char pointer types should be encoded as '*' unless it is a 3726 // type that has been typedef'd to 'BOOL'. 3727 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3728 S += '*'; 3729 return; 3730 } 3731 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3732 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3733 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3734 S += '#'; 3735 return; 3736 } 3737 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3738 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3739 S += '@'; 3740 return; 3741 } 3742 // fall through... 3743 } 3744 S += '^'; 3745 getLegacyIntegralTypeEncoding(PointeeTy); 3746 3747 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3748 NULL); 3749 return; 3750 } 3751 3752 if (const ArrayType *AT = 3753 // Ignore type qualifiers etc. 3754 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3755 if (isa<IncompleteArrayType>(AT)) { 3756 // Incomplete arrays are encoded as a pointer to the array element. 3757 S += '^'; 3758 3759 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3760 false, ExpandStructures, FD); 3761 } else { 3762 S += '['; 3763 3764 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3765 S += llvm::utostr(CAT->getSize().getZExtValue()); 3766 else { 3767 //Variable length arrays are encoded as a regular array with 0 elements. 3768 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3769 S += '0'; 3770 } 3771 3772 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3773 false, ExpandStructures, FD); 3774 S += ']'; 3775 } 3776 return; 3777 } 3778 3779 if (T->getAs<FunctionType>()) { 3780 S += '?'; 3781 return; 3782 } 3783 3784 if (const RecordType *RTy = T->getAs<RecordType>()) { 3785 RecordDecl *RDecl = RTy->getDecl(); 3786 S += RDecl->isUnion() ? '(' : '{'; 3787 // Anonymous structures print as '?' 3788 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3789 S += II->getName(); 3790 if (ClassTemplateSpecializationDecl *Spec 3791 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 3792 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 3793 std::string TemplateArgsStr 3794 = TemplateSpecializationType::PrintTemplateArgumentList( 3795 TemplateArgs.getFlatArgumentList(), 3796 TemplateArgs.flat_size(), 3797 (*this).PrintingPolicy); 3798 3799 S += TemplateArgsStr; 3800 } 3801 } else { 3802 S += '?'; 3803 } 3804 if (ExpandStructures) { 3805 S += '='; 3806 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3807 FieldEnd = RDecl->field_end(); 3808 Field != FieldEnd; ++Field) { 3809 if (FD) { 3810 S += '"'; 3811 S += Field->getNameAsString(); 3812 S += '"'; 3813 } 3814 3815 // Special case bit-fields. 3816 if (Field->isBitField()) { 3817 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3818 (*Field)); 3819 } else { 3820 QualType qt = Field->getType(); 3821 getLegacyIntegralTypeEncoding(qt); 3822 getObjCEncodingForTypeImpl(qt, S, false, true, 3823 FD); 3824 } 3825 } 3826 } 3827 S += RDecl->isUnion() ? ')' : '}'; 3828 return; 3829 } 3830 3831 if (T->isEnumeralType()) { 3832 if (FD && FD->isBitField()) 3833 EncodeBitField(this, S, T, FD); 3834 else 3835 S += 'i'; 3836 return; 3837 } 3838 3839 if (T->isBlockPointerType()) { 3840 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3841 return; 3842 } 3843 3844 // Ignore protocol qualifiers when mangling at this level. 3845 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 3846 T = OT->getBaseType(); 3847 3848 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3849 // @encode(class_name) 3850 ObjCInterfaceDecl *OI = OIT->getDecl(); 3851 S += '{'; 3852 const IdentifierInfo *II = OI->getIdentifier(); 3853 S += II->getName(); 3854 S += '='; 3855 llvm::SmallVector<FieldDecl*, 32> RecFields; 3856 CollectObjCIvars(OI, RecFields); 3857 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 3858 if (RecFields[i]->isBitField()) 3859 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3860 RecFields[i]); 3861 else 3862 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3863 FD); 3864 } 3865 S += '}'; 3866 return; 3867 } 3868 3869 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 3870 if (OPT->isObjCIdType()) { 3871 S += '@'; 3872 return; 3873 } 3874 3875 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 3876 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 3877 // Since this is a binary compatibility issue, need to consult with runtime 3878 // folks. Fortunately, this is a *very* obsure construct. 3879 S += '#'; 3880 return; 3881 } 3882 3883 if (OPT->isObjCQualifiedIdType()) { 3884 getObjCEncodingForTypeImpl(getObjCIdType(), S, 3885 ExpandPointedToStructures, 3886 ExpandStructures, FD); 3887 if (FD || EncodingProperty) { 3888 // Note that we do extended encoding of protocol qualifer list 3889 // Only when doing ivar or property encoding. 3890 S += '"'; 3891 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3892 E = OPT->qual_end(); I != E; ++I) { 3893 S += '<'; 3894 S += (*I)->getNameAsString(); 3895 S += '>'; 3896 } 3897 S += '"'; 3898 } 3899 return; 3900 } 3901 3902 QualType PointeeTy = OPT->getPointeeType(); 3903 if (!EncodingProperty && 3904 isa<TypedefType>(PointeeTy.getTypePtr())) { 3905 // Another historical/compatibility reason. 3906 // We encode the underlying type which comes out as 3907 // {...}; 3908 S += '^'; 3909 getObjCEncodingForTypeImpl(PointeeTy, S, 3910 false, ExpandPointedToStructures, 3911 NULL); 3912 return; 3913 } 3914 3915 S += '@'; 3916 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 3917 S += '"'; 3918 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 3919 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3920 E = OPT->qual_end(); I != E; ++I) { 3921 S += '<'; 3922 S += (*I)->getNameAsString(); 3923 S += '>'; 3924 } 3925 S += '"'; 3926 } 3927 return; 3928 } 3929 3930 // gcc just blithely ignores member pointers. 3931 // TODO: maybe there should be a mangling for these 3932 if (T->getAs<MemberPointerType>()) 3933 return; 3934 3935 assert(0 && "@encode for type not implemented!"); 3936} 3937 3938void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 3939 std::string& S) const { 3940 if (QT & Decl::OBJC_TQ_In) 3941 S += 'n'; 3942 if (QT & Decl::OBJC_TQ_Inout) 3943 S += 'N'; 3944 if (QT & Decl::OBJC_TQ_Out) 3945 S += 'o'; 3946 if (QT & Decl::OBJC_TQ_Bycopy) 3947 S += 'O'; 3948 if (QT & Decl::OBJC_TQ_Byref) 3949 S += 'R'; 3950 if (QT & Decl::OBJC_TQ_Oneway) 3951 S += 'V'; 3952} 3953 3954void ASTContext::setBuiltinVaListType(QualType T) { 3955 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 3956 3957 BuiltinVaListType = T; 3958} 3959 3960void ASTContext::setObjCIdType(QualType T) { 3961 ObjCIdTypedefType = T; 3962} 3963 3964void ASTContext::setObjCSelType(QualType T) { 3965 ObjCSelTypedefType = T; 3966} 3967 3968void ASTContext::setObjCProtoType(QualType QT) { 3969 ObjCProtoType = QT; 3970} 3971 3972void ASTContext::setObjCClassType(QualType T) { 3973 ObjCClassTypedefType = T; 3974} 3975 3976void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 3977 assert(ObjCConstantStringType.isNull() && 3978 "'NSConstantString' type already set!"); 3979 3980 ObjCConstantStringType = getObjCInterfaceType(Decl); 3981} 3982 3983/// \brief Retrieve the template name that corresponds to a non-empty 3984/// lookup. 3985TemplateName ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 3986 UnresolvedSetIterator End) { 3987 unsigned size = End - Begin; 3988 assert(size > 1 && "set is not overloaded!"); 3989 3990 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 3991 size * sizeof(FunctionTemplateDecl*)); 3992 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 3993 3994 NamedDecl **Storage = OT->getStorage(); 3995 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 3996 NamedDecl *D = *I; 3997 assert(isa<FunctionTemplateDecl>(D) || 3998 (isa<UsingShadowDecl>(D) && 3999 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 4000 *Storage++ = D; 4001 } 4002 4003 return TemplateName(OT); 4004} 4005 4006/// \brief Retrieve the template name that represents a qualified 4007/// template name such as \c std::vector. 4008TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 4009 bool TemplateKeyword, 4010 TemplateDecl *Template) { 4011 // FIXME: Canonicalization? 4012 llvm::FoldingSetNodeID ID; 4013 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 4014 4015 void *InsertPos = 0; 4016 QualifiedTemplateName *QTN = 4017 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4018 if (!QTN) { 4019 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 4020 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 4021 } 4022 4023 return TemplateName(QTN); 4024} 4025 4026/// \brief Retrieve the template name that represents a dependent 4027/// template name such as \c MetaFun::template apply. 4028TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4029 const IdentifierInfo *Name) { 4030 assert((!NNS || NNS->isDependent()) && 4031 "Nested name specifier must be dependent"); 4032 4033 llvm::FoldingSetNodeID ID; 4034 DependentTemplateName::Profile(ID, NNS, Name); 4035 4036 void *InsertPos = 0; 4037 DependentTemplateName *QTN = 4038 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4039 4040 if (QTN) 4041 return TemplateName(QTN); 4042 4043 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4044 if (CanonNNS == NNS) { 4045 QTN = new (*this,4) DependentTemplateName(NNS, Name); 4046 } else { 4047 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 4048 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 4049 DependentTemplateName *CheckQTN = 4050 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4051 assert(!CheckQTN && "Dependent type name canonicalization broken"); 4052 (void)CheckQTN; 4053 } 4054 4055 DependentTemplateNames.InsertNode(QTN, InsertPos); 4056 return TemplateName(QTN); 4057} 4058 4059/// \brief Retrieve the template name that represents a dependent 4060/// template name such as \c MetaFun::template operator+. 4061TemplateName 4062ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4063 OverloadedOperatorKind Operator) { 4064 assert((!NNS || NNS->isDependent()) && 4065 "Nested name specifier must be dependent"); 4066 4067 llvm::FoldingSetNodeID ID; 4068 DependentTemplateName::Profile(ID, NNS, Operator); 4069 4070 void *InsertPos = 0; 4071 DependentTemplateName *QTN 4072 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4073 4074 if (QTN) 4075 return TemplateName(QTN); 4076 4077 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4078 if (CanonNNS == NNS) { 4079 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 4080 } else { 4081 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 4082 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 4083 4084 DependentTemplateName *CheckQTN 4085 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4086 assert(!CheckQTN && "Dependent template name canonicalization broken"); 4087 (void)CheckQTN; 4088 } 4089 4090 DependentTemplateNames.InsertNode(QTN, InsertPos); 4091 return TemplateName(QTN); 4092} 4093 4094/// getFromTargetType - Given one of the integer types provided by 4095/// TargetInfo, produce the corresponding type. The unsigned @p Type 4096/// is actually a value of type @c TargetInfo::IntType. 4097CanQualType ASTContext::getFromTargetType(unsigned Type) const { 4098 switch (Type) { 4099 case TargetInfo::NoInt: return CanQualType(); 4100 case TargetInfo::SignedShort: return ShortTy; 4101 case TargetInfo::UnsignedShort: return UnsignedShortTy; 4102 case TargetInfo::SignedInt: return IntTy; 4103 case TargetInfo::UnsignedInt: return UnsignedIntTy; 4104 case TargetInfo::SignedLong: return LongTy; 4105 case TargetInfo::UnsignedLong: return UnsignedLongTy; 4106 case TargetInfo::SignedLongLong: return LongLongTy; 4107 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 4108 } 4109 4110 assert(false && "Unhandled TargetInfo::IntType value"); 4111 return CanQualType(); 4112} 4113 4114//===----------------------------------------------------------------------===// 4115// Type Predicates. 4116//===----------------------------------------------------------------------===// 4117 4118/// isObjCNSObjectType - Return true if this is an NSObject object using 4119/// NSObject attribute on a c-style pointer type. 4120/// FIXME - Make it work directly on types. 4121/// FIXME: Move to Type. 4122/// 4123bool ASTContext::isObjCNSObjectType(QualType Ty) const { 4124 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 4125 if (TypedefDecl *TD = TDT->getDecl()) 4126 if (TD->getAttr<ObjCNSObjectAttr>()) 4127 return true; 4128 } 4129 return false; 4130} 4131 4132/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 4133/// garbage collection attribute. 4134/// 4135Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 4136 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 4137 if (getLangOptions().ObjC1 && 4138 getLangOptions().getGCMode() != LangOptions::NonGC) { 4139 GCAttrs = Ty.getObjCGCAttr(); 4140 // Default behavious under objective-c's gc is for objective-c pointers 4141 // (or pointers to them) be treated as though they were declared 4142 // as __strong. 4143 if (GCAttrs == Qualifiers::GCNone) { 4144 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 4145 GCAttrs = Qualifiers::Strong; 4146 else if (Ty->isPointerType()) 4147 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 4148 } 4149 // Non-pointers have none gc'able attribute regardless of the attribute 4150 // set on them. 4151 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 4152 return Qualifiers::GCNone; 4153 } 4154 return GCAttrs; 4155} 4156 4157//===----------------------------------------------------------------------===// 4158// Type Compatibility Testing 4159//===----------------------------------------------------------------------===// 4160 4161/// areCompatVectorTypes - Return true if the two specified vector types are 4162/// compatible. 4163static bool areCompatVectorTypes(const VectorType *LHS, 4164 const VectorType *RHS) { 4165 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 4166 return LHS->getElementType() == RHS->getElementType() && 4167 LHS->getNumElements() == RHS->getNumElements(); 4168} 4169 4170bool ASTContext::areCompatibleVectorTypes(QualType FirstVec, 4171 QualType SecondVec) { 4172 assert(FirstVec->isVectorType() && "FirstVec should be a vector type"); 4173 assert(SecondVec->isVectorType() && "SecondVec should be a vector type"); 4174 4175 if (hasSameUnqualifiedType(FirstVec, SecondVec)) 4176 return true; 4177 4178 // AltiVec vectors types are identical to equivalent GCC vector types 4179 const VectorType *First = FirstVec->getAs<VectorType>(); 4180 const VectorType *Second = SecondVec->getAs<VectorType>(); 4181 if ((((First->getAltiVecSpecific() == VectorType::AltiVec) && 4182 (Second->getAltiVecSpecific() == VectorType::NotAltiVec)) || 4183 ((First->getAltiVecSpecific() == VectorType::NotAltiVec) && 4184 (Second->getAltiVecSpecific() == VectorType::AltiVec))) && 4185 hasSameType(First->getElementType(), Second->getElementType()) && 4186 (First->getNumElements() == Second->getNumElements())) 4187 return true; 4188 4189 return false; 4190} 4191 4192//===----------------------------------------------------------------------===// 4193// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 4194//===----------------------------------------------------------------------===// 4195 4196/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 4197/// inheritance hierarchy of 'rProto'. 4198bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 4199 ObjCProtocolDecl *rProto) { 4200 if (lProto == rProto) 4201 return true; 4202 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 4203 E = rProto->protocol_end(); PI != E; ++PI) 4204 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 4205 return true; 4206 return false; 4207} 4208 4209/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 4210/// return true if lhs's protocols conform to rhs's protocol; false 4211/// otherwise. 4212bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 4213 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 4214 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 4215 return false; 4216} 4217 4218/// ObjCQualifiedClassTypesAreCompatible - compare Class<p,...> and 4219/// Class<p1, ...>. 4220bool ASTContext::ObjCQualifiedClassTypesAreCompatible(QualType lhs, 4221 QualType rhs) { 4222 const ObjCObjectPointerType *lhsQID = lhs->getAs<ObjCObjectPointerType>(); 4223 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4224 assert ((lhsQID && rhsOPT) && "ObjCQualifiedClassTypesAreCompatible"); 4225 4226 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4227 E = lhsQID->qual_end(); I != E; ++I) { 4228 bool match = false; 4229 ObjCProtocolDecl *lhsProto = *I; 4230 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4231 E = rhsOPT->qual_end(); J != E; ++J) { 4232 ObjCProtocolDecl *rhsProto = *J; 4233 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto)) { 4234 match = true; 4235 break; 4236 } 4237 } 4238 if (!match) 4239 return false; 4240 } 4241 return true; 4242} 4243 4244/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 4245/// ObjCQualifiedIDType. 4246bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4247 bool compare) { 4248 // Allow id<P..> and an 'id' or void* type in all cases. 4249 if (lhs->isVoidPointerType() || 4250 lhs->isObjCIdType() || lhs->isObjCClassType()) 4251 return true; 4252 else if (rhs->isVoidPointerType() || 4253 rhs->isObjCIdType() || rhs->isObjCClassType()) 4254 return true; 4255 4256 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4257 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4258 4259 if (!rhsOPT) return false; 4260 4261 if (rhsOPT->qual_empty()) { 4262 // If the RHS is a unqualified interface pointer "NSString*", 4263 // make sure we check the class hierarchy. 4264 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4265 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4266 E = lhsQID->qual_end(); I != E; ++I) { 4267 // when comparing an id<P> on lhs with a static type on rhs, 4268 // see if static class implements all of id's protocols, directly or 4269 // through its super class and categories. 4270 if (!rhsID->ClassImplementsProtocol(*I, true)) 4271 return false; 4272 } 4273 } 4274 // If there are no qualifiers and no interface, we have an 'id'. 4275 return true; 4276 } 4277 // Both the right and left sides have qualifiers. 4278 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4279 E = lhsQID->qual_end(); I != E; ++I) { 4280 ObjCProtocolDecl *lhsProto = *I; 4281 bool match = false; 4282 4283 // when comparing an id<P> on lhs with a static type on rhs, 4284 // see if static class implements all of id's protocols, directly or 4285 // through its super class and categories. 4286 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4287 E = rhsOPT->qual_end(); J != E; ++J) { 4288 ObjCProtocolDecl *rhsProto = *J; 4289 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4290 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4291 match = true; 4292 break; 4293 } 4294 } 4295 // If the RHS is a qualified interface pointer "NSString<P>*", 4296 // make sure we check the class hierarchy. 4297 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4298 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4299 E = lhsQID->qual_end(); I != E; ++I) { 4300 // when comparing an id<P> on lhs with a static type on rhs, 4301 // see if static class implements all of id's protocols, directly or 4302 // through its super class and categories. 4303 if (rhsID->ClassImplementsProtocol(*I, true)) { 4304 match = true; 4305 break; 4306 } 4307 } 4308 } 4309 if (!match) 4310 return false; 4311 } 4312 4313 return true; 4314 } 4315 4316 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4317 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4318 4319 if (const ObjCObjectPointerType *lhsOPT = 4320 lhs->getAsObjCInterfacePointerType()) { 4321 if (lhsOPT->qual_empty()) { 4322 bool match = false; 4323 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4324 for (ObjCObjectPointerType::qual_iterator I = rhsQID->qual_begin(), 4325 E = rhsQID->qual_end(); I != E; ++I) { 4326 // when comparing an id<P> on lhs with a static type on rhs, 4327 // see if static class implements all of id's protocols, directly or 4328 // through its super class and categories. 4329 if (lhsID->ClassImplementsProtocol(*I, true)) { 4330 match = true; 4331 break; 4332 } 4333 } 4334 if (!match) 4335 return false; 4336 } 4337 return true; 4338 } 4339 // Both the right and left sides have qualifiers. 4340 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4341 E = lhsOPT->qual_end(); I != E; ++I) { 4342 ObjCProtocolDecl *lhsProto = *I; 4343 bool match = false; 4344 4345 // when comparing an id<P> on lhs with a static type on rhs, 4346 // see if static class implements all of id's protocols, directly or 4347 // through its super class and categories. 4348 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4349 E = rhsQID->qual_end(); J != E; ++J) { 4350 ObjCProtocolDecl *rhsProto = *J; 4351 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4352 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4353 match = true; 4354 break; 4355 } 4356 } 4357 if (!match) 4358 return false; 4359 } 4360 return true; 4361 } 4362 return false; 4363} 4364 4365/// canAssignObjCInterfaces - Return true if the two interface types are 4366/// compatible for assignment from RHS to LHS. This handles validation of any 4367/// protocol qualifiers on the LHS or RHS. 4368/// 4369bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4370 const ObjCObjectPointerType *RHSOPT) { 4371 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4372 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4373 4374 // If either type represents the built-in 'id' or 'Class' types, return true. 4375 if (LHS->isObjCUnqualifiedIdOrClass() || 4376 RHS->isObjCUnqualifiedIdOrClass()) 4377 return true; 4378 4379 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 4380 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4381 QualType(RHSOPT,0), 4382 false); 4383 4384 if (LHS->isObjCQualifiedClass() && RHS->isObjCQualifiedClass()) 4385 return ObjCQualifiedClassTypesAreCompatible(QualType(LHSOPT,0), 4386 QualType(RHSOPT,0)); 4387 4388 // If we have 2 user-defined types, fall into that path. 4389 if (LHS->getInterface() && RHS->getInterface()) 4390 return canAssignObjCInterfaces(LHS, RHS); 4391 4392 return false; 4393} 4394 4395/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4396/// for providing type-safty for objective-c pointers used to pass/return 4397/// arguments in block literals. When passed as arguments, passing 'A*' where 4398/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4399/// not OK. For the return type, the opposite is not OK. 4400bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4401 const ObjCObjectPointerType *LHSOPT, 4402 const ObjCObjectPointerType *RHSOPT) { 4403 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4404 return true; 4405 4406 if (LHSOPT->isObjCBuiltinType()) { 4407 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4408 } 4409 4410 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4411 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4412 QualType(RHSOPT,0), 4413 false); 4414 4415 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4416 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4417 if (LHS && RHS) { // We have 2 user-defined types. 4418 if (LHS != RHS) { 4419 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4420 return false; 4421 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4422 return true; 4423 } 4424 else 4425 return true; 4426 } 4427 return false; 4428} 4429 4430/// getIntersectionOfProtocols - This routine finds the intersection of set 4431/// of protocols inherited from two distinct objective-c pointer objects. 4432/// It is used to build composite qualifier list of the composite type of 4433/// the conditional expression involving two objective-c pointer objects. 4434static 4435void getIntersectionOfProtocols(ASTContext &Context, 4436 const ObjCObjectPointerType *LHSOPT, 4437 const ObjCObjectPointerType *RHSOPT, 4438 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4439 4440 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4441 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4442 assert(LHS->getInterface() && "LHS must have an interface base"); 4443 assert(RHS->getInterface() && "RHS must have an interface base"); 4444 4445 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4446 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4447 if (LHSNumProtocols > 0) 4448 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4449 else { 4450 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4451 Context.CollectInheritedProtocols(LHS->getInterface(), 4452 LHSInheritedProtocols); 4453 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4454 LHSInheritedProtocols.end()); 4455 } 4456 4457 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4458 if (RHSNumProtocols > 0) { 4459 ObjCProtocolDecl **RHSProtocols = 4460 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4461 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4462 if (InheritedProtocolSet.count(RHSProtocols[i])) 4463 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4464 } 4465 else { 4466 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4467 Context.CollectInheritedProtocols(RHS->getInterface(), 4468 RHSInheritedProtocols); 4469 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4470 RHSInheritedProtocols.begin(), 4471 E = RHSInheritedProtocols.end(); I != E; ++I) 4472 if (InheritedProtocolSet.count((*I))) 4473 IntersectionOfProtocols.push_back((*I)); 4474 } 4475} 4476 4477/// areCommonBaseCompatible - Returns common base class of the two classes if 4478/// one found. Note that this is O'2 algorithm. But it will be called as the 4479/// last type comparison in a ?-exp of ObjC pointer types before a 4480/// warning is issued. So, its invokation is extremely rare. 4481QualType ASTContext::areCommonBaseCompatible( 4482 const ObjCObjectPointerType *Lptr, 4483 const ObjCObjectPointerType *Rptr) { 4484 const ObjCObjectType *LHS = Lptr->getObjectType(); 4485 const ObjCObjectType *RHS = Rptr->getObjectType(); 4486 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 4487 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 4488 if (!LDecl || !RDecl) 4489 return QualType(); 4490 4491 while ((LDecl = LDecl->getSuperClass())) { 4492 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 4493 if (canAssignObjCInterfaces(LHS, RHS)) { 4494 llvm::SmallVector<ObjCProtocolDecl *, 8> Protocols; 4495 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 4496 4497 QualType Result = QualType(LHS, 0); 4498 if (!Protocols.empty()) 4499 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 4500 Result = getObjCObjectPointerType(Result); 4501 return Result; 4502 } 4503 } 4504 4505 return QualType(); 4506} 4507 4508bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 4509 const ObjCObjectType *RHS) { 4510 assert(LHS->getInterface() && "LHS is not an interface type"); 4511 assert(RHS->getInterface() && "RHS is not an interface type"); 4512 4513 // Verify that the base decls are compatible: the RHS must be a subclass of 4514 // the LHS. 4515 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 4516 return false; 4517 4518 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4519 // protocol qualified at all, then we are good. 4520 if (LHS->getNumProtocols() == 0) 4521 return true; 4522 4523 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4524 // isn't a superset. 4525 if (RHS->getNumProtocols() == 0) 4526 return true; // FIXME: should return false! 4527 4528 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 4529 LHSPE = LHS->qual_end(); 4530 LHSPI != LHSPE; LHSPI++) { 4531 bool RHSImplementsProtocol = false; 4532 4533 // If the RHS doesn't implement the protocol on the left, the types 4534 // are incompatible. 4535 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 4536 RHSPE = RHS->qual_end(); 4537 RHSPI != RHSPE; RHSPI++) { 4538 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4539 RHSImplementsProtocol = true; 4540 break; 4541 } 4542 } 4543 // FIXME: For better diagnostics, consider passing back the protocol name. 4544 if (!RHSImplementsProtocol) 4545 return false; 4546 } 4547 // The RHS implements all protocols listed on the LHS. 4548 return true; 4549} 4550 4551bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4552 // get the "pointed to" types 4553 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4554 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4555 4556 if (!LHSOPT || !RHSOPT) 4557 return false; 4558 4559 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4560 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4561} 4562 4563bool ASTContext::canBindObjCObjectType(QualType To, QualType From) { 4564 return canAssignObjCInterfaces( 4565 getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(), 4566 getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>()); 4567} 4568 4569/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4570/// both shall have the identically qualified version of a compatible type. 4571/// C99 6.2.7p1: Two types have compatible types if their types are the 4572/// same. See 6.7.[2,3,5] for additional rules. 4573bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS, 4574 bool CompareUnqualified) { 4575 if (getLangOptions().CPlusPlus) 4576 return hasSameType(LHS, RHS); 4577 4578 return !mergeTypes(LHS, RHS, false, CompareUnqualified).isNull(); 4579} 4580 4581bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 4582 return !mergeTypes(LHS, RHS, true).isNull(); 4583} 4584 4585QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 4586 bool OfBlockPointer, 4587 bool Unqualified) { 4588 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4589 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4590 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4591 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4592 bool allLTypes = true; 4593 bool allRTypes = true; 4594 4595 // Check return type 4596 QualType retType; 4597 if (OfBlockPointer) 4598 retType = mergeTypes(rbase->getResultType(), lbase->getResultType(), true, 4599 Unqualified); 4600 else 4601 retType = mergeTypes(lbase->getResultType(), rbase->getResultType(), 4602 false, Unqualified); 4603 if (retType.isNull()) return QualType(); 4604 4605 if (Unqualified) 4606 retType = retType.getUnqualifiedType(); 4607 4608 CanQualType LRetType = getCanonicalType(lbase->getResultType()); 4609 CanQualType RRetType = getCanonicalType(rbase->getResultType()); 4610 if (Unqualified) { 4611 LRetType = LRetType.getUnqualifiedType(); 4612 RRetType = RRetType.getUnqualifiedType(); 4613 } 4614 4615 if (getCanonicalType(retType) != LRetType) 4616 allLTypes = false; 4617 if (getCanonicalType(retType) != RRetType) 4618 allRTypes = false; 4619 // FIXME: double check this 4620 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 4621 // rbase->getRegParmAttr() != 0 && 4622 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 4623 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 4624 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 4625 unsigned RegParm = lbaseInfo.getRegParm() == 0 ? rbaseInfo.getRegParm() : 4626 lbaseInfo.getRegParm(); 4627 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 4628 if (NoReturn != lbaseInfo.getNoReturn() || 4629 RegParm != lbaseInfo.getRegParm()) 4630 allLTypes = false; 4631 if (NoReturn != rbaseInfo.getNoReturn() || 4632 RegParm != rbaseInfo.getRegParm()) 4633 allRTypes = false; 4634 CallingConv lcc = lbaseInfo.getCC(); 4635 CallingConv rcc = rbaseInfo.getCC(); 4636 // Compatible functions must have compatible calling conventions 4637 if (!isSameCallConv(lcc, rcc)) 4638 return QualType(); 4639 4640 if (lproto && rproto) { // two C99 style function prototypes 4641 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4642 "C++ shouldn't be here"); 4643 unsigned lproto_nargs = lproto->getNumArgs(); 4644 unsigned rproto_nargs = rproto->getNumArgs(); 4645 4646 // Compatible functions must have the same number of arguments 4647 if (lproto_nargs != rproto_nargs) 4648 return QualType(); 4649 4650 // Variadic and non-variadic functions aren't compatible 4651 if (lproto->isVariadic() != rproto->isVariadic()) 4652 return QualType(); 4653 4654 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4655 return QualType(); 4656 4657 // Check argument compatibility 4658 llvm::SmallVector<QualType, 10> types; 4659 for (unsigned i = 0; i < lproto_nargs; i++) { 4660 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4661 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4662 QualType argtype = mergeTypes(largtype, rargtype, OfBlockPointer, 4663 Unqualified); 4664 if (argtype.isNull()) return QualType(); 4665 4666 if (Unqualified) 4667 argtype = argtype.getUnqualifiedType(); 4668 4669 types.push_back(argtype); 4670 if (Unqualified) { 4671 largtype = largtype.getUnqualifiedType(); 4672 rargtype = rargtype.getUnqualifiedType(); 4673 } 4674 4675 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4676 allLTypes = false; 4677 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4678 allRTypes = false; 4679 } 4680 if (allLTypes) return lhs; 4681 if (allRTypes) return rhs; 4682 return getFunctionType(retType, types.begin(), types.size(), 4683 lproto->isVariadic(), lproto->getTypeQuals(), 4684 false, false, 0, 0, 4685 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4686 } 4687 4688 if (lproto) allRTypes = false; 4689 if (rproto) allLTypes = false; 4690 4691 const FunctionProtoType *proto = lproto ? lproto : rproto; 4692 if (proto) { 4693 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4694 if (proto->isVariadic()) return QualType(); 4695 // Check that the types are compatible with the types that 4696 // would result from default argument promotions (C99 6.7.5.3p15). 4697 // The only types actually affected are promotable integer 4698 // types and floats, which would be passed as a different 4699 // type depending on whether the prototype is visible. 4700 unsigned proto_nargs = proto->getNumArgs(); 4701 for (unsigned i = 0; i < proto_nargs; ++i) { 4702 QualType argTy = proto->getArgType(i); 4703 4704 // Look at the promotion type of enum types, since that is the type used 4705 // to pass enum values. 4706 if (const EnumType *Enum = argTy->getAs<EnumType>()) 4707 argTy = Enum->getDecl()->getPromotionType(); 4708 4709 if (argTy->isPromotableIntegerType() || 4710 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4711 return QualType(); 4712 } 4713 4714 if (allLTypes) return lhs; 4715 if (allRTypes) return rhs; 4716 return getFunctionType(retType, proto->arg_type_begin(), 4717 proto->getNumArgs(), proto->isVariadic(), 4718 proto->getTypeQuals(), 4719 false, false, 0, 0, 4720 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4721 } 4722 4723 if (allLTypes) return lhs; 4724 if (allRTypes) return rhs; 4725 FunctionType::ExtInfo Info(NoReturn, RegParm, lcc); 4726 return getFunctionNoProtoType(retType, Info); 4727} 4728 4729QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 4730 bool OfBlockPointer, 4731 bool Unqualified) { 4732 // C++ [expr]: If an expression initially has the type "reference to T", the 4733 // type is adjusted to "T" prior to any further analysis, the expression 4734 // designates the object or function denoted by the reference, and the 4735 // expression is an lvalue unless the reference is an rvalue reference and 4736 // the expression is a function call (possibly inside parentheses). 4737 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 4738 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 4739 4740 if (Unqualified) { 4741 LHS = LHS.getUnqualifiedType(); 4742 RHS = RHS.getUnqualifiedType(); 4743 } 4744 4745 QualType LHSCan = getCanonicalType(LHS), 4746 RHSCan = getCanonicalType(RHS); 4747 4748 // If two types are identical, they are compatible. 4749 if (LHSCan == RHSCan) 4750 return LHS; 4751 4752 // If the qualifiers are different, the types aren't compatible... mostly. 4753 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4754 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4755 if (LQuals != RQuals) { 4756 // If any of these qualifiers are different, we have a type 4757 // mismatch. 4758 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4759 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4760 return QualType(); 4761 4762 // Exactly one GC qualifier difference is allowed: __strong is 4763 // okay if the other type has no GC qualifier but is an Objective 4764 // C object pointer (i.e. implicitly strong by default). We fix 4765 // this by pretending that the unqualified type was actually 4766 // qualified __strong. 4767 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4768 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4769 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4770 4771 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4772 return QualType(); 4773 4774 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4775 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4776 } 4777 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4778 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4779 } 4780 return QualType(); 4781 } 4782 4783 // Okay, qualifiers are equal. 4784 4785 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4786 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4787 4788 // We want to consider the two function types to be the same for these 4789 // comparisons, just force one to the other. 4790 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 4791 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 4792 4793 // Same as above for arrays 4794 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 4795 LHSClass = Type::ConstantArray; 4796 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 4797 RHSClass = Type::ConstantArray; 4798 4799 // ObjCInterfaces are just specialized ObjCObjects. 4800 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 4801 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 4802 4803 // Canonicalize ExtVector -> Vector. 4804 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 4805 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 4806 4807 // If the canonical type classes don't match. 4808 if (LHSClass != RHSClass) { 4809 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 4810 // a signed integer type, or an unsigned integer type. 4811 // Compatibility is based on the underlying type, not the promotion 4812 // type. 4813 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 4814 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 4815 return RHS; 4816 } 4817 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 4818 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 4819 return LHS; 4820 } 4821 4822 return QualType(); 4823 } 4824 4825 // The canonical type classes match. 4826 switch (LHSClass) { 4827#define TYPE(Class, Base) 4828#define ABSTRACT_TYPE(Class, Base) 4829#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 4830#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4831#define DEPENDENT_TYPE(Class, Base) case Type::Class: 4832#include "clang/AST/TypeNodes.def" 4833 assert(false && "Non-canonical and dependent types shouldn't get here"); 4834 return QualType(); 4835 4836 case Type::LValueReference: 4837 case Type::RValueReference: 4838 case Type::MemberPointer: 4839 assert(false && "C++ should never be in mergeTypes"); 4840 return QualType(); 4841 4842 case Type::ObjCInterface: 4843 case Type::IncompleteArray: 4844 case Type::VariableArray: 4845 case Type::FunctionProto: 4846 case Type::ExtVector: 4847 assert(false && "Types are eliminated above"); 4848 return QualType(); 4849 4850 case Type::Pointer: 4851 { 4852 // Merge two pointer types, while trying to preserve typedef info 4853 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 4854 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 4855 if (Unqualified) { 4856 LHSPointee = LHSPointee.getUnqualifiedType(); 4857 RHSPointee = RHSPointee.getUnqualifiedType(); 4858 } 4859 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, false, 4860 Unqualified); 4861 if (ResultType.isNull()) return QualType(); 4862 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4863 return LHS; 4864 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4865 return RHS; 4866 return getPointerType(ResultType); 4867 } 4868 case Type::BlockPointer: 4869 { 4870 // Merge two block pointer types, while trying to preserve typedef info 4871 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 4872 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 4873 if (Unqualified) { 4874 LHSPointee = LHSPointee.getUnqualifiedType(); 4875 RHSPointee = RHSPointee.getUnqualifiedType(); 4876 } 4877 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer, 4878 Unqualified); 4879 if (ResultType.isNull()) return QualType(); 4880 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4881 return LHS; 4882 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4883 return RHS; 4884 return getBlockPointerType(ResultType); 4885 } 4886 case Type::ConstantArray: 4887 { 4888 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 4889 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 4890 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 4891 return QualType(); 4892 4893 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 4894 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 4895 if (Unqualified) { 4896 LHSElem = LHSElem.getUnqualifiedType(); 4897 RHSElem = RHSElem.getUnqualifiedType(); 4898 } 4899 4900 QualType ResultType = mergeTypes(LHSElem, RHSElem, false, Unqualified); 4901 if (ResultType.isNull()) return QualType(); 4902 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4903 return LHS; 4904 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4905 return RHS; 4906 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 4907 ArrayType::ArraySizeModifier(), 0); 4908 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 4909 ArrayType::ArraySizeModifier(), 0); 4910 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 4911 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 4912 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4913 return LHS; 4914 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4915 return RHS; 4916 if (LVAT) { 4917 // FIXME: This isn't correct! But tricky to implement because 4918 // the array's size has to be the size of LHS, but the type 4919 // has to be different. 4920 return LHS; 4921 } 4922 if (RVAT) { 4923 // FIXME: This isn't correct! But tricky to implement because 4924 // the array's size has to be the size of RHS, but the type 4925 // has to be different. 4926 return RHS; 4927 } 4928 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 4929 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 4930 return getIncompleteArrayType(ResultType, 4931 ArrayType::ArraySizeModifier(), 0); 4932 } 4933 case Type::FunctionNoProto: 4934 return mergeFunctionTypes(LHS, RHS, OfBlockPointer, Unqualified); 4935 case Type::Record: 4936 case Type::Enum: 4937 return QualType(); 4938 case Type::Builtin: 4939 // Only exactly equal builtin types are compatible, which is tested above. 4940 return QualType(); 4941 case Type::Complex: 4942 // Distinct complex types are incompatible. 4943 return QualType(); 4944 case Type::Vector: 4945 // FIXME: The merged type should be an ExtVector! 4946 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 4947 RHSCan->getAs<VectorType>())) 4948 return LHS; 4949 return QualType(); 4950 case Type::ObjCObject: { 4951 // Check if the types are assignment compatible. 4952 // FIXME: This should be type compatibility, e.g. whether 4953 // "LHS x; RHS x;" at global scope is legal. 4954 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 4955 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 4956 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 4957 return LHS; 4958 4959 return QualType(); 4960 } 4961 case Type::ObjCObjectPointer: { 4962 if (OfBlockPointer) { 4963 if (canAssignObjCInterfacesInBlockPointer( 4964 LHS->getAs<ObjCObjectPointerType>(), 4965 RHS->getAs<ObjCObjectPointerType>())) 4966 return LHS; 4967 return QualType(); 4968 } 4969 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 4970 RHS->getAs<ObjCObjectPointerType>())) 4971 return LHS; 4972 4973 return QualType(); 4974 } 4975 } 4976 4977 return QualType(); 4978} 4979 4980/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 4981/// 'RHS' attributes and returns the merged version; including for function 4982/// return types. 4983QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 4984 QualType LHSCan = getCanonicalType(LHS), 4985 RHSCan = getCanonicalType(RHS); 4986 // If two types are identical, they are compatible. 4987 if (LHSCan == RHSCan) 4988 return LHS; 4989 if (RHSCan->isFunctionType()) { 4990 if (!LHSCan->isFunctionType()) 4991 return QualType(); 4992 QualType OldReturnType = 4993 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 4994 QualType NewReturnType = 4995 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 4996 QualType ResReturnType = 4997 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 4998 if (ResReturnType.isNull()) 4999 return QualType(); 5000 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 5001 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 5002 // In either case, use OldReturnType to build the new function type. 5003 const FunctionType *F = LHS->getAs<FunctionType>(); 5004 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 5005 FunctionType::ExtInfo Info = getFunctionExtInfo(LHS); 5006 QualType ResultType 5007 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 5008 FPT->getNumArgs(), FPT->isVariadic(), 5009 FPT->getTypeQuals(), 5010 FPT->hasExceptionSpec(), 5011 FPT->hasAnyExceptionSpec(), 5012 FPT->getNumExceptions(), 5013 FPT->exception_begin(), 5014 Info); 5015 return ResultType; 5016 } 5017 } 5018 return QualType(); 5019 } 5020 5021 // If the qualifiers are different, the types can still be merged. 5022 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5023 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5024 if (LQuals != RQuals) { 5025 // If any of these qualifiers are different, we have a type mismatch. 5026 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5027 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5028 return QualType(); 5029 5030 // Exactly one GC qualifier difference is allowed: __strong is 5031 // okay if the other type has no GC qualifier but is an Objective 5032 // C object pointer (i.e. implicitly strong by default). We fix 5033 // this by pretending that the unqualified type was actually 5034 // qualified __strong. 5035 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5036 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5037 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5038 5039 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5040 return QualType(); 5041 5042 if (GC_L == Qualifiers::Strong) 5043 return LHS; 5044 if (GC_R == Qualifiers::Strong) 5045 return RHS; 5046 return QualType(); 5047 } 5048 5049 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 5050 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5051 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5052 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 5053 if (ResQT == LHSBaseQT) 5054 return LHS; 5055 if (ResQT == RHSBaseQT) 5056 return RHS; 5057 } 5058 return QualType(); 5059} 5060 5061//===----------------------------------------------------------------------===// 5062// Integer Predicates 5063//===----------------------------------------------------------------------===// 5064 5065unsigned ASTContext::getIntWidth(QualType T) { 5066 if (T->isBooleanType()) 5067 return 1; 5068 if (EnumType *ET = dyn_cast<EnumType>(T)) 5069 T = ET->getDecl()->getIntegerType(); 5070 // For builtin types, just use the standard type sizing method 5071 return (unsigned)getTypeSize(T); 5072} 5073 5074QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 5075 assert(T->hasSignedIntegerRepresentation() && "Unexpected type"); 5076 5077 // Turn <4 x signed int> -> <4 x unsigned int> 5078 if (const VectorType *VTy = T->getAs<VectorType>()) 5079 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 5080 VTy->getNumElements(), VTy->getAltiVecSpecific()); 5081 5082 // For enums, we return the unsigned version of the base type. 5083 if (const EnumType *ETy = T->getAs<EnumType>()) 5084 T = ETy->getDecl()->getIntegerType(); 5085 5086 const BuiltinType *BTy = T->getAs<BuiltinType>(); 5087 assert(BTy && "Unexpected signed integer type"); 5088 switch (BTy->getKind()) { 5089 case BuiltinType::Char_S: 5090 case BuiltinType::SChar: 5091 return UnsignedCharTy; 5092 case BuiltinType::Short: 5093 return UnsignedShortTy; 5094 case BuiltinType::Int: 5095 return UnsignedIntTy; 5096 case BuiltinType::Long: 5097 return UnsignedLongTy; 5098 case BuiltinType::LongLong: 5099 return UnsignedLongLongTy; 5100 case BuiltinType::Int128: 5101 return UnsignedInt128Ty; 5102 default: 5103 assert(0 && "Unexpected signed integer type"); 5104 return QualType(); 5105 } 5106} 5107 5108ExternalASTSource::~ExternalASTSource() { } 5109 5110void ExternalASTSource::PrintStats() { } 5111 5112 5113//===----------------------------------------------------------------------===// 5114// Builtin Type Computation 5115//===----------------------------------------------------------------------===// 5116 5117/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 5118/// pointer over the consumed characters. This returns the resultant type. 5119static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 5120 ASTContext::GetBuiltinTypeError &Error, 5121 bool AllowTypeModifiers = true) { 5122 // Modifiers. 5123 int HowLong = 0; 5124 bool Signed = false, Unsigned = false; 5125 5126 // Read the modifiers first. 5127 bool Done = false; 5128 while (!Done) { 5129 switch (*Str++) { 5130 default: Done = true; --Str; break; 5131 case 'S': 5132 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 5133 assert(!Signed && "Can't use 'S' modifier multiple times!"); 5134 Signed = true; 5135 break; 5136 case 'U': 5137 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 5138 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 5139 Unsigned = true; 5140 break; 5141 case 'L': 5142 assert(HowLong <= 2 && "Can't have LLLL modifier"); 5143 ++HowLong; 5144 break; 5145 } 5146 } 5147 5148 QualType Type; 5149 5150 // Read the base type. 5151 switch (*Str++) { 5152 default: assert(0 && "Unknown builtin type letter!"); 5153 case 'v': 5154 assert(HowLong == 0 && !Signed && !Unsigned && 5155 "Bad modifiers used with 'v'!"); 5156 Type = Context.VoidTy; 5157 break; 5158 case 'f': 5159 assert(HowLong == 0 && !Signed && !Unsigned && 5160 "Bad modifiers used with 'f'!"); 5161 Type = Context.FloatTy; 5162 break; 5163 case 'd': 5164 assert(HowLong < 2 && !Signed && !Unsigned && 5165 "Bad modifiers used with 'd'!"); 5166 if (HowLong) 5167 Type = Context.LongDoubleTy; 5168 else 5169 Type = Context.DoubleTy; 5170 break; 5171 case 's': 5172 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 5173 if (Unsigned) 5174 Type = Context.UnsignedShortTy; 5175 else 5176 Type = Context.ShortTy; 5177 break; 5178 case 'i': 5179 if (HowLong == 3) 5180 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 5181 else if (HowLong == 2) 5182 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 5183 else if (HowLong == 1) 5184 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 5185 else 5186 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 5187 break; 5188 case 'c': 5189 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 5190 if (Signed) 5191 Type = Context.SignedCharTy; 5192 else if (Unsigned) 5193 Type = Context.UnsignedCharTy; 5194 else 5195 Type = Context.CharTy; 5196 break; 5197 case 'b': // boolean 5198 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 5199 Type = Context.BoolTy; 5200 break; 5201 case 'z': // size_t. 5202 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 5203 Type = Context.getSizeType(); 5204 break; 5205 case 'F': 5206 Type = Context.getCFConstantStringType(); 5207 break; 5208 case 'a': 5209 Type = Context.getBuiltinVaListType(); 5210 assert(!Type.isNull() && "builtin va list type not initialized!"); 5211 break; 5212 case 'A': 5213 // This is a "reference" to a va_list; however, what exactly 5214 // this means depends on how va_list is defined. There are two 5215 // different kinds of va_list: ones passed by value, and ones 5216 // passed by reference. An example of a by-value va_list is 5217 // x86, where va_list is a char*. An example of by-ref va_list 5218 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 5219 // we want this argument to be a char*&; for x86-64, we want 5220 // it to be a __va_list_tag*. 5221 Type = Context.getBuiltinVaListType(); 5222 assert(!Type.isNull() && "builtin va list type not initialized!"); 5223 if (Type->isArrayType()) { 5224 Type = Context.getArrayDecayedType(Type); 5225 } else { 5226 Type = Context.getLValueReferenceType(Type); 5227 } 5228 break; 5229 case 'V': { 5230 char *End; 5231 unsigned NumElements = strtoul(Str, &End, 10); 5232 assert(End != Str && "Missing vector size"); 5233 5234 Str = End; 5235 5236 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 5237 // FIXME: Don't know what to do about AltiVec. 5238 Type = Context.getVectorType(ElementType, NumElements, 5239 VectorType::NotAltiVec); 5240 break; 5241 } 5242 case 'X': { 5243 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 5244 Type = Context.getComplexType(ElementType); 5245 break; 5246 } 5247 case 'P': 5248 Type = Context.getFILEType(); 5249 if (Type.isNull()) { 5250 Error = ASTContext::GE_Missing_stdio; 5251 return QualType(); 5252 } 5253 break; 5254 case 'J': 5255 if (Signed) 5256 Type = Context.getsigjmp_bufType(); 5257 else 5258 Type = Context.getjmp_bufType(); 5259 5260 if (Type.isNull()) { 5261 Error = ASTContext::GE_Missing_setjmp; 5262 return QualType(); 5263 } 5264 break; 5265 } 5266 5267 if (!AllowTypeModifiers) 5268 return Type; 5269 5270 Done = false; 5271 while (!Done) { 5272 switch (char c = *Str++) { 5273 default: Done = true; --Str; break; 5274 case '*': 5275 case '&': 5276 { 5277 // Both pointers and references can have their pointee types 5278 // qualified with an address space. 5279 char *End; 5280 unsigned AddrSpace = strtoul(Str, &End, 10); 5281 if (End != Str && AddrSpace != 0) { 5282 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 5283 Str = End; 5284 } 5285 } 5286 if (c == '*') 5287 Type = Context.getPointerType(Type); 5288 else 5289 Type = Context.getLValueReferenceType(Type); 5290 break; 5291 // FIXME: There's no way to have a built-in with an rvalue ref arg. 5292 case 'C': 5293 Type = Type.withConst(); 5294 break; 5295 case 'D': 5296 Type = Context.getVolatileType(Type); 5297 break; 5298 } 5299 } 5300 5301 return Type; 5302} 5303 5304/// GetBuiltinType - Return the type for the specified builtin. 5305QualType ASTContext::GetBuiltinType(unsigned id, 5306 GetBuiltinTypeError &Error) { 5307 const char *TypeStr = BuiltinInfo.GetTypeString(id); 5308 5309 llvm::SmallVector<QualType, 8> ArgTypes; 5310 5311 Error = GE_None; 5312 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 5313 if (Error != GE_None) 5314 return QualType(); 5315 while (TypeStr[0] && TypeStr[0] != '.') { 5316 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 5317 if (Error != GE_None) 5318 return QualType(); 5319 5320 // Do array -> pointer decay. The builtin should use the decayed type. 5321 if (Ty->isArrayType()) 5322 Ty = getArrayDecayedType(Ty); 5323 5324 ArgTypes.push_back(Ty); 5325 } 5326 5327 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 5328 "'.' should only occur at end of builtin type list!"); 5329 5330 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 5331 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 5332 return getFunctionNoProtoType(ResType); 5333 5334 // FIXME: Should we create noreturn types? 5335 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 5336 TypeStr[0] == '.', 0, false, false, 0, 0, 5337 FunctionType::ExtInfo()); 5338} 5339 5340QualType 5341ASTContext::UsualArithmeticConversionsType(QualType lhs, QualType rhs) { 5342 // Perform the usual unary conversions. We do this early so that 5343 // integral promotions to "int" can allow us to exit early, in the 5344 // lhs == rhs check. Also, for conversion purposes, we ignore any 5345 // qualifiers. For example, "const float" and "float" are 5346 // equivalent. 5347 if (lhs->isPromotableIntegerType()) 5348 lhs = getPromotedIntegerType(lhs); 5349 else 5350 lhs = lhs.getUnqualifiedType(); 5351 if (rhs->isPromotableIntegerType()) 5352 rhs = getPromotedIntegerType(rhs); 5353 else 5354 rhs = rhs.getUnqualifiedType(); 5355 5356 // If both types are identical, no conversion is needed. 5357 if (lhs == rhs) 5358 return lhs; 5359 5360 // If either side is a non-arithmetic type (e.g. a pointer), we are done. 5361 // The caller can deal with this (e.g. pointer + int). 5362 if (!lhs->isArithmeticType() || !rhs->isArithmeticType()) 5363 return lhs; 5364 5365 // At this point, we have two different arithmetic types. 5366 5367 // Handle complex types first (C99 6.3.1.8p1). 5368 if (lhs->isComplexType() || rhs->isComplexType()) { 5369 // if we have an integer operand, the result is the complex type. 5370 if (rhs->isIntegerType() || rhs->isComplexIntegerType()) { 5371 // convert the rhs to the lhs complex type. 5372 return lhs; 5373 } 5374 if (lhs->isIntegerType() || lhs->isComplexIntegerType()) { 5375 // convert the lhs to the rhs complex type. 5376 return rhs; 5377 } 5378 // This handles complex/complex, complex/float, or float/complex. 5379 // When both operands are complex, the shorter operand is converted to the 5380 // type of the longer, and that is the type of the result. This corresponds 5381 // to what is done when combining two real floating-point operands. 5382 // The fun begins when size promotion occur across type domains. 5383 // From H&S 6.3.4: When one operand is complex and the other is a real 5384 // floating-point type, the less precise type is converted, within it's 5385 // real or complex domain, to the precision of the other type. For example, 5386 // when combining a "long double" with a "double _Complex", the 5387 // "double _Complex" is promoted to "long double _Complex". 5388 int result = getFloatingTypeOrder(lhs, rhs); 5389 5390 if (result > 0) { // The left side is bigger, convert rhs. 5391 rhs = getFloatingTypeOfSizeWithinDomain(lhs, rhs); 5392 } else if (result < 0) { // The right side is bigger, convert lhs. 5393 lhs = getFloatingTypeOfSizeWithinDomain(rhs, lhs); 5394 } 5395 // At this point, lhs and rhs have the same rank/size. Now, make sure the 5396 // domains match. This is a requirement for our implementation, C99 5397 // does not require this promotion. 5398 if (lhs != rhs) { // Domains don't match, we have complex/float mix. 5399 if (lhs->isRealFloatingType()) { // handle "double, _Complex double". 5400 return rhs; 5401 } else { // handle "_Complex double, double". 5402 return lhs; 5403 } 5404 } 5405 return lhs; // The domain/size match exactly. 5406 } 5407 // Now handle "real" floating types (i.e. float, double, long double). 5408 if (lhs->isRealFloatingType() || rhs->isRealFloatingType()) { 5409 // if we have an integer operand, the result is the real floating type. 5410 if (rhs->isIntegerType()) { 5411 // convert rhs to the lhs floating point type. 5412 return lhs; 5413 } 5414 if (rhs->isComplexIntegerType()) { 5415 // convert rhs to the complex floating point type. 5416 return getComplexType(lhs); 5417 } 5418 if (lhs->isIntegerType()) { 5419 // convert lhs to the rhs floating point type. 5420 return rhs; 5421 } 5422 if (lhs->isComplexIntegerType()) { 5423 // convert lhs to the complex floating point type. 5424 return getComplexType(rhs); 5425 } 5426 // We have two real floating types, float/complex combos were handled above. 5427 // Convert the smaller operand to the bigger result. 5428 int result = getFloatingTypeOrder(lhs, rhs); 5429 if (result > 0) // convert the rhs 5430 return lhs; 5431 assert(result < 0 && "illegal float comparison"); 5432 return rhs; // convert the lhs 5433 } 5434 if (lhs->isComplexIntegerType() || rhs->isComplexIntegerType()) { 5435 // Handle GCC complex int extension. 5436 const ComplexType *lhsComplexInt = lhs->getAsComplexIntegerType(); 5437 const ComplexType *rhsComplexInt = rhs->getAsComplexIntegerType(); 5438 5439 if (lhsComplexInt && rhsComplexInt) { 5440 if (getIntegerTypeOrder(lhsComplexInt->getElementType(), 5441 rhsComplexInt->getElementType()) >= 0) 5442 return lhs; // convert the rhs 5443 return rhs; 5444 } else if (lhsComplexInt && rhs->isIntegerType()) { 5445 // convert the rhs to the lhs complex type. 5446 return lhs; 5447 } else if (rhsComplexInt && lhs->isIntegerType()) { 5448 // convert the lhs to the rhs complex type. 5449 return rhs; 5450 } 5451 } 5452 // Finally, we have two differing integer types. 5453 // The rules for this case are in C99 6.3.1.8 5454 int compare = getIntegerTypeOrder(lhs, rhs); 5455 bool lhsSigned = lhs->hasSignedIntegerRepresentation(), 5456 rhsSigned = rhs->hasSignedIntegerRepresentation(); 5457 QualType destType; 5458 if (lhsSigned == rhsSigned) { 5459 // Same signedness; use the higher-ranked type 5460 destType = compare >= 0 ? lhs : rhs; 5461 } else if (compare != (lhsSigned ? 1 : -1)) { 5462 // The unsigned type has greater than or equal rank to the 5463 // signed type, so use the unsigned type 5464 destType = lhsSigned ? rhs : lhs; 5465 } else if (getIntWidth(lhs) != getIntWidth(rhs)) { 5466 // The two types are different widths; if we are here, that 5467 // means the signed type is larger than the unsigned type, so 5468 // use the signed type. 5469 destType = lhsSigned ? lhs : rhs; 5470 } else { 5471 // The signed type is higher-ranked than the unsigned type, 5472 // but isn't actually any bigger (like unsigned int and long 5473 // on most 32-bit systems). Use the unsigned type corresponding 5474 // to the signed type. 5475 destType = getCorrespondingUnsignedType(lhsSigned ? lhs : rhs); 5476 } 5477 return destType; 5478} 5479 5480GVALinkage ASTContext::GetGVALinkageForFunction(const FunctionDecl *FD) { 5481 GVALinkage External = GVA_StrongExternal; 5482 5483 Linkage L = FD->getLinkage(); 5484 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 5485 FD->getType()->getLinkage() == UniqueExternalLinkage) 5486 L = UniqueExternalLinkage; 5487 5488 switch (L) { 5489 case NoLinkage: 5490 case InternalLinkage: 5491 case UniqueExternalLinkage: 5492 return GVA_Internal; 5493 5494 case ExternalLinkage: 5495 switch (FD->getTemplateSpecializationKind()) { 5496 case TSK_Undeclared: 5497 case TSK_ExplicitSpecialization: 5498 External = GVA_StrongExternal; 5499 break; 5500 5501 case TSK_ExplicitInstantiationDefinition: 5502 return GVA_ExplicitTemplateInstantiation; 5503 5504 case TSK_ExplicitInstantiationDeclaration: 5505 case TSK_ImplicitInstantiation: 5506 External = GVA_TemplateInstantiation; 5507 break; 5508 } 5509 } 5510 5511 if (!FD->isInlined()) 5512 return External; 5513 5514 if (!getLangOptions().CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 5515 // GNU or C99 inline semantics. Determine whether this symbol should be 5516 // externally visible. 5517 if (FD->isInlineDefinitionExternallyVisible()) 5518 return External; 5519 5520 // C99 inline semantics, where the symbol is not externally visible. 5521 return GVA_C99Inline; 5522 } 5523 5524 // C++0x [temp.explicit]p9: 5525 // [ Note: The intent is that an inline function that is the subject of 5526 // an explicit instantiation declaration will still be implicitly 5527 // instantiated when used so that the body can be considered for 5528 // inlining, but that no out-of-line copy of the inline function would be 5529 // generated in the translation unit. -- end note ] 5530 if (FD->getTemplateSpecializationKind() 5531 == TSK_ExplicitInstantiationDeclaration) 5532 return GVA_C99Inline; 5533 5534 return GVA_CXXInline; 5535} 5536 5537GVALinkage ASTContext::GetGVALinkageForVariable(const VarDecl *VD) { 5538 // If this is a static data member, compute the kind of template 5539 // specialization. Otherwise, this variable is not part of a 5540 // template. 5541 TemplateSpecializationKind TSK = TSK_Undeclared; 5542 if (VD->isStaticDataMember()) 5543 TSK = VD->getTemplateSpecializationKind(); 5544 5545 Linkage L = VD->getLinkage(); 5546 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 5547 VD->getType()->getLinkage() == UniqueExternalLinkage) 5548 L = UniqueExternalLinkage; 5549 5550 switch (L) { 5551 case NoLinkage: 5552 case InternalLinkage: 5553 case UniqueExternalLinkage: 5554 return GVA_Internal; 5555 5556 case ExternalLinkage: 5557 switch (TSK) { 5558 case TSK_Undeclared: 5559 case TSK_ExplicitSpecialization: 5560 return GVA_StrongExternal; 5561 5562 case TSK_ExplicitInstantiationDeclaration: 5563 llvm_unreachable("Variable should not be instantiated"); 5564 // Fall through to treat this like any other instantiation. 5565 5566 case TSK_ExplicitInstantiationDefinition: 5567 return GVA_ExplicitTemplateInstantiation; 5568 5569 case TSK_ImplicitInstantiation: 5570 return GVA_TemplateInstantiation; 5571 } 5572 } 5573 5574 return GVA_StrongExternal; 5575} 5576 5577bool ASTContext::DeclMustBeEmitted(const Decl *D) { 5578 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 5579 if (!VD->isFileVarDecl()) 5580 return false; 5581 } else if (!isa<FunctionDecl>(D)) 5582 return false; 5583 5584 // Weak references don't produce any output by themselves. 5585 if (D->hasAttr<WeakRefAttr>()) 5586 return false; 5587 5588 // Aliases and used decls are required. 5589 if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>()) 5590 return true; 5591 5592 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 5593 // Forward declarations aren't required. 5594 if (!FD->isThisDeclarationADefinition()) 5595 return false; 5596 5597 // Constructors and destructors are required. 5598 if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>()) 5599 return true; 5600 5601 // The key function for a class is required. 5602 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 5603 const CXXRecordDecl *RD = MD->getParent(); 5604 if (MD->isOutOfLine() && RD->isDynamicClass()) { 5605 const CXXMethodDecl *KeyFunc = getKeyFunction(RD); 5606 if (KeyFunc && KeyFunc->getCanonicalDecl() == MD->getCanonicalDecl()) 5607 return true; 5608 } 5609 } 5610 5611 GVALinkage Linkage = GetGVALinkageForFunction(FD); 5612 5613 // static, static inline, always_inline, and extern inline functions can 5614 // always be deferred. Normal inline functions can be deferred in C99/C++. 5615 // Implicit template instantiations can also be deferred in C++. 5616 if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 5617 Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 5618 return false; 5619 return true; 5620 } 5621 5622 const VarDecl *VD = cast<VarDecl>(D); 5623 assert(VD->isFileVarDecl() && "Expected file scoped var"); 5624 5625 if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) 5626 return false; 5627 5628 // Structs that have non-trivial constructors or destructors are required. 5629 5630 // FIXME: Handle references. 5631 if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { 5632 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 5633 if (!RD->hasTrivialConstructor() || !RD->hasTrivialDestructor()) 5634 return true; 5635 } 5636 } 5637 5638 GVALinkage L = GetGVALinkageForVariable(VD); 5639 if (L == GVA_Internal || L == GVA_TemplateInstantiation) { 5640 if (!(VD->getInit() && VD->getInit()->HasSideEffects(*this))) 5641 return false; 5642 } 5643 5644 return true; 5645} 5646