ASTContext.cpp revision dab60ad68a3a98d687305941a3852e793705f945
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#include "CXXABI.h" 32 33using namespace clang; 34 35unsigned ASTContext::NumImplicitDefaultConstructors; 36unsigned ASTContext::NumImplicitDefaultConstructorsDeclared; 37unsigned ASTContext::NumImplicitCopyConstructors; 38unsigned ASTContext::NumImplicitCopyConstructorsDeclared; 39unsigned ASTContext::NumImplicitCopyAssignmentOperators; 40unsigned ASTContext::NumImplicitCopyAssignmentOperatorsDeclared; 41unsigned ASTContext::NumImplicitDestructors; 42unsigned ASTContext::NumImplicitDestructorsDeclared; 43 44enum FloatingRank { 45 FloatRank, DoubleRank, LongDoubleRank 46}; 47 48void 49ASTContext::CanonicalTemplateTemplateParm::Profile(llvm::FoldingSetNodeID &ID, 50 TemplateTemplateParmDecl *Parm) { 51 ID.AddInteger(Parm->getDepth()); 52 ID.AddInteger(Parm->getPosition()); 53 // FIXME: Parameter pack 54 55 TemplateParameterList *Params = Parm->getTemplateParameters(); 56 ID.AddInteger(Params->size()); 57 for (TemplateParameterList::const_iterator P = Params->begin(), 58 PEnd = Params->end(); 59 P != PEnd; ++P) { 60 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) { 61 ID.AddInteger(0); 62 ID.AddBoolean(TTP->isParameterPack()); 63 continue; 64 } 65 66 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 67 ID.AddInteger(1); 68 // FIXME: Parameter pack 69 ID.AddPointer(NTTP->getType().getAsOpaquePtr()); 70 continue; 71 } 72 73 TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P); 74 ID.AddInteger(2); 75 Profile(ID, TTP); 76 } 77} 78 79TemplateTemplateParmDecl * 80ASTContext::getCanonicalTemplateTemplateParmDecl( 81 TemplateTemplateParmDecl *TTP) { 82 // Check if we already have a canonical template template parameter. 83 llvm::FoldingSetNodeID ID; 84 CanonicalTemplateTemplateParm::Profile(ID, TTP); 85 void *InsertPos = 0; 86 CanonicalTemplateTemplateParm *Canonical 87 = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 88 if (Canonical) 89 return Canonical->getParam(); 90 91 // Build a canonical template parameter list. 92 TemplateParameterList *Params = TTP->getTemplateParameters(); 93 llvm::SmallVector<NamedDecl *, 4> CanonParams; 94 CanonParams.reserve(Params->size()); 95 for (TemplateParameterList::const_iterator P = Params->begin(), 96 PEnd = Params->end(); 97 P != PEnd; ++P) { 98 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) 99 CanonParams.push_back( 100 TemplateTypeParmDecl::Create(*this, getTranslationUnitDecl(), 101 SourceLocation(), TTP->getDepth(), 102 TTP->getIndex(), 0, false, 103 TTP->isParameterPack())); 104 else if (NonTypeTemplateParmDecl *NTTP 105 = dyn_cast<NonTypeTemplateParmDecl>(*P)) 106 CanonParams.push_back( 107 NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 108 SourceLocation(), NTTP->getDepth(), 109 NTTP->getPosition(), 0, 110 getCanonicalType(NTTP->getType()), 111 0)); 112 else 113 CanonParams.push_back(getCanonicalTemplateTemplateParmDecl( 114 cast<TemplateTemplateParmDecl>(*P))); 115 } 116 117 TemplateTemplateParmDecl *CanonTTP 118 = TemplateTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 119 SourceLocation(), TTP->getDepth(), 120 TTP->getPosition(), 0, 121 TemplateParameterList::Create(*this, SourceLocation(), 122 SourceLocation(), 123 CanonParams.data(), 124 CanonParams.size(), 125 SourceLocation())); 126 127 // Get the new insert position for the node we care about. 128 Canonical = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 129 assert(Canonical == 0 && "Shouldn't be in the map!"); 130 (void)Canonical; 131 132 // Create the canonical template template parameter entry. 133 Canonical = new (*this) CanonicalTemplateTemplateParm(CanonTTP); 134 CanonTemplateTemplateParms.InsertNode(Canonical, InsertPos); 135 return CanonTTP; 136} 137 138CXXABI *ASTContext::createCXXABI(const TargetInfo &T) { 139 if (!LangOpts.CPlusPlus) return 0; 140 141 switch (T.getCXXABI()) { 142 case CXXABI_ARM: 143 return CreateARMCXXABI(*this); 144 case CXXABI_Itanium: 145 return CreateItaniumCXXABI(*this); 146 case CXXABI_Microsoft: 147 return CreateMicrosoftCXXABI(*this); 148 } 149 return 0; 150} 151 152ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 153 const TargetInfo &t, 154 IdentifierTable &idents, SelectorTable &sels, 155 Builtin::Context &builtins, 156 unsigned size_reserve) : 157 TemplateSpecializationTypes(this_()), 158 DependentTemplateSpecializationTypes(this_()), 159 GlobalNestedNameSpecifier(0), IsInt128Installed(false), 160 CFConstantStringTypeDecl(0), NSConstantStringTypeDecl(0), 161 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 162 sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 163 NullTypeSourceInfo(QualType()), 164 SourceMgr(SM), LangOpts(LOpts), ABI(createCXXABI(t)), Target(t), 165 Idents(idents), Selectors(sels), 166 BuiltinInfo(builtins), 167 DeclarationNames(*this), 168 ExternalSource(0), PrintingPolicy(LOpts), 169 LastSDM(0, 0), 170 UniqueBlockByRefTypeID(0), UniqueBlockParmTypeID(0) { 171 ObjCIdRedefinitionType = QualType(); 172 ObjCClassRedefinitionType = QualType(); 173 ObjCSelRedefinitionType = QualType(); 174 if (size_reserve > 0) Types.reserve(size_reserve); 175 TUDecl = TranslationUnitDecl::Create(*this); 176 InitBuiltinTypes(); 177} 178 179ASTContext::~ASTContext() { 180 // Release the DenseMaps associated with DeclContext objects. 181 // FIXME: Is this the ideal solution? 182 ReleaseDeclContextMaps(); 183 184 // Call all of the deallocation functions. 185 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 186 Deallocations[I].first(Deallocations[I].second); 187 188 // Release all of the memory associated with overridden C++ methods. 189 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 190 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 191 OM != OMEnd; ++OM) 192 OM->second.Destroy(); 193 194 // ASTRecordLayout objects in ASTRecordLayouts must always be destroyed 195 // because they can contain DenseMaps. 196 for (llvm::DenseMap<const ObjCContainerDecl*, 197 const ASTRecordLayout*>::iterator 198 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) 199 // Increment in loop to prevent using deallocated memory. 200 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 201 R->Destroy(*this); 202 203 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 204 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 205 // Increment in loop to prevent using deallocated memory. 206 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 207 R->Destroy(*this); 208 } 209 210 for (llvm::DenseMap<const Decl*, AttrVec*>::iterator A = DeclAttrs.begin(), 211 AEnd = DeclAttrs.end(); 212 A != AEnd; ++A) 213 A->second->~AttrVec(); 214} 215 216void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 217 Deallocations.push_back(std::make_pair(Callback, Data)); 218} 219 220void 221ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 222 ExternalSource.reset(Source.take()); 223} 224 225void ASTContext::PrintStats() const { 226 fprintf(stderr, "*** AST Context Stats:\n"); 227 fprintf(stderr, " %d types total.\n", (int)Types.size()); 228 229 unsigned counts[] = { 230#define TYPE(Name, Parent) 0, 231#define ABSTRACT_TYPE(Name, Parent) 232#include "clang/AST/TypeNodes.def" 233 0 // Extra 234 }; 235 236 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 237 Type *T = Types[i]; 238 counts[(unsigned)T->getTypeClass()]++; 239 } 240 241 unsigned Idx = 0; 242 unsigned TotalBytes = 0; 243#define TYPE(Name, Parent) \ 244 if (counts[Idx]) \ 245 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 246 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 247 ++Idx; 248#define ABSTRACT_TYPE(Name, Parent) 249#include "clang/AST/TypeNodes.def" 250 251 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 252 253 // Implicit special member functions. 254 fprintf(stderr, " %u/%u implicit default constructors created\n", 255 NumImplicitDefaultConstructorsDeclared, 256 NumImplicitDefaultConstructors); 257 fprintf(stderr, " %u/%u implicit copy constructors created\n", 258 NumImplicitCopyConstructorsDeclared, 259 NumImplicitCopyConstructors); 260 fprintf(stderr, " %u/%u implicit copy assignment operators created\n", 261 NumImplicitCopyAssignmentOperatorsDeclared, 262 NumImplicitCopyAssignmentOperators); 263 fprintf(stderr, " %u/%u implicit destructors created\n", 264 NumImplicitDestructorsDeclared, NumImplicitDestructors); 265 266 if (ExternalSource.get()) { 267 fprintf(stderr, "\n"); 268 ExternalSource->PrintStats(); 269 } 270 271 BumpAlloc.PrintStats(); 272} 273 274 275void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 276 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 277 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 278 Types.push_back(Ty); 279} 280 281void ASTContext::InitBuiltinTypes() { 282 assert(VoidTy.isNull() && "Context reinitialized?"); 283 284 // C99 6.2.5p19. 285 InitBuiltinType(VoidTy, BuiltinType::Void); 286 287 // C99 6.2.5p2. 288 InitBuiltinType(BoolTy, BuiltinType::Bool); 289 // C99 6.2.5p3. 290 if (LangOpts.CharIsSigned) 291 InitBuiltinType(CharTy, BuiltinType::Char_S); 292 else 293 InitBuiltinType(CharTy, BuiltinType::Char_U); 294 // C99 6.2.5p4. 295 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 296 InitBuiltinType(ShortTy, BuiltinType::Short); 297 InitBuiltinType(IntTy, BuiltinType::Int); 298 InitBuiltinType(LongTy, BuiltinType::Long); 299 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 300 301 // C99 6.2.5p6. 302 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 303 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 304 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 305 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 306 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 307 308 // C99 6.2.5p10. 309 InitBuiltinType(FloatTy, BuiltinType::Float); 310 InitBuiltinType(DoubleTy, BuiltinType::Double); 311 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 312 313 // GNU extension, 128-bit integers. 314 InitBuiltinType(Int128Ty, BuiltinType::Int128); 315 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 316 317 if (LangOpts.CPlusPlus) // C++ 3.9.1p5 318 InitBuiltinType(WCharTy, BuiltinType::WChar); 319 else // C99 320 WCharTy = getFromTargetType(Target.getWCharType()); 321 322 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 323 InitBuiltinType(Char16Ty, BuiltinType::Char16); 324 else // C99 325 Char16Ty = getFromTargetType(Target.getChar16Type()); 326 327 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 328 InitBuiltinType(Char32Ty, BuiltinType::Char32); 329 else // C99 330 Char32Ty = getFromTargetType(Target.getChar32Type()); 331 332 // Placeholder type for functions. 333 InitBuiltinType(OverloadTy, BuiltinType::Overload); 334 335 // Placeholder type for type-dependent expressions whose type is 336 // completely unknown. No code should ever check a type against 337 // DependentTy and users should never see it; however, it is here to 338 // help diagnose failures to properly check for type-dependent 339 // expressions. 340 InitBuiltinType(DependentTy, BuiltinType::Dependent); 341 342 // Placeholder type for C++0x auto declarations whose real type has 343 // not yet been deduced. 344 InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 345 346 // C99 6.2.5p11. 347 FloatComplexTy = getComplexType(FloatTy); 348 DoubleComplexTy = getComplexType(DoubleTy); 349 LongDoubleComplexTy = getComplexType(LongDoubleTy); 350 351 BuiltinVaListType = QualType(); 352 353 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 354 ObjCIdTypedefType = QualType(); 355 ObjCClassTypedefType = QualType(); 356 ObjCSelTypedefType = QualType(); 357 358 // Builtin types for 'id', 'Class', and 'SEL'. 359 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 360 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 361 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 362 363 ObjCConstantStringType = QualType(); 364 365 // void * type 366 VoidPtrTy = getPointerType(VoidTy); 367 368 // nullptr type (C++0x 2.14.7) 369 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 370} 371 372Diagnostic &ASTContext::getDiagnostics() const { 373 return SourceMgr.getDiagnostics(); 374} 375 376AttrVec& ASTContext::getDeclAttrs(const Decl *D) { 377 AttrVec *&Result = DeclAttrs[D]; 378 if (!Result) { 379 void *Mem = Allocate(sizeof(AttrVec)); 380 Result = new (Mem) AttrVec; 381 } 382 383 return *Result; 384} 385 386/// \brief Erase the attributes corresponding to the given declaration. 387void ASTContext::eraseDeclAttrs(const Decl *D) { 388 llvm::DenseMap<const Decl*, AttrVec*>::iterator Pos = DeclAttrs.find(D); 389 if (Pos != DeclAttrs.end()) { 390 Pos->second->~AttrVec(); 391 DeclAttrs.erase(Pos); 392 } 393} 394 395 396MemberSpecializationInfo * 397ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 398 assert(Var->isStaticDataMember() && "Not a static data member"); 399 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 400 = InstantiatedFromStaticDataMember.find(Var); 401 if (Pos == InstantiatedFromStaticDataMember.end()) 402 return 0; 403 404 return Pos->second; 405} 406 407void 408ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 409 TemplateSpecializationKind TSK, 410 SourceLocation PointOfInstantiation) { 411 assert(Inst->isStaticDataMember() && "Not a static data member"); 412 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 413 assert(!InstantiatedFromStaticDataMember[Inst] && 414 "Already noted what static data member was instantiated from"); 415 InstantiatedFromStaticDataMember[Inst] 416 = new (*this) MemberSpecializationInfo(Tmpl, TSK, PointOfInstantiation); 417} 418 419NamedDecl * 420ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 421 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 422 = InstantiatedFromUsingDecl.find(UUD); 423 if (Pos == InstantiatedFromUsingDecl.end()) 424 return 0; 425 426 return Pos->second; 427} 428 429void 430ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 431 assert((isa<UsingDecl>(Pattern) || 432 isa<UnresolvedUsingValueDecl>(Pattern) || 433 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 434 "pattern decl is not a using decl"); 435 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 436 InstantiatedFromUsingDecl[Inst] = Pattern; 437} 438 439UsingShadowDecl * 440ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 441 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 442 = InstantiatedFromUsingShadowDecl.find(Inst); 443 if (Pos == InstantiatedFromUsingShadowDecl.end()) 444 return 0; 445 446 return Pos->second; 447} 448 449void 450ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 451 UsingShadowDecl *Pattern) { 452 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 453 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 454} 455 456FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 457 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 458 = InstantiatedFromUnnamedFieldDecl.find(Field); 459 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 460 return 0; 461 462 return Pos->second; 463} 464 465void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 466 FieldDecl *Tmpl) { 467 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 468 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 469 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 470 "Already noted what unnamed field was instantiated from"); 471 472 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 473} 474 475ASTContext::overridden_cxx_method_iterator 476ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 477 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 478 = OverriddenMethods.find(Method); 479 if (Pos == OverriddenMethods.end()) 480 return 0; 481 482 return Pos->second.begin(); 483} 484 485ASTContext::overridden_cxx_method_iterator 486ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 487 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 488 = OverriddenMethods.find(Method); 489 if (Pos == OverriddenMethods.end()) 490 return 0; 491 492 return Pos->second.end(); 493} 494 495unsigned 496ASTContext::overridden_methods_size(const CXXMethodDecl *Method) const { 497 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 498 = OverriddenMethods.find(Method); 499 if (Pos == OverriddenMethods.end()) 500 return 0; 501 502 return Pos->second.size(); 503} 504 505void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 506 const CXXMethodDecl *Overridden) { 507 OverriddenMethods[Method].push_back(Overridden); 508} 509 510//===----------------------------------------------------------------------===// 511// Type Sizing and Analysis 512//===----------------------------------------------------------------------===// 513 514/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 515/// scalar floating point type. 516const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 517 const BuiltinType *BT = T->getAs<BuiltinType>(); 518 assert(BT && "Not a floating point type!"); 519 switch (BT->getKind()) { 520 default: assert(0 && "Not a floating point type!"); 521 case BuiltinType::Float: return Target.getFloatFormat(); 522 case BuiltinType::Double: return Target.getDoubleFormat(); 523 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 524 } 525} 526 527/// getDeclAlign - Return a conservative estimate of the alignment of the 528/// specified decl. Note that bitfields do not have a valid alignment, so 529/// this method will assert on them. 530/// If @p RefAsPointee, references are treated like their underlying type 531/// (for alignof), else they're treated like pointers (for CodeGen). 532CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) { 533 unsigned Align = Target.getCharWidth(); 534 535 Align = std::max(Align, D->getMaxAlignment()); 536 537 if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 538 QualType T = VD->getType(); 539 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 540 if (RefAsPointee) 541 T = RT->getPointeeType(); 542 else 543 T = getPointerType(RT->getPointeeType()); 544 } 545 if (!T->isIncompleteType() && !T->isFunctionType()) { 546 unsigned MinWidth = Target.getLargeArrayMinWidth(); 547 unsigned ArrayAlign = Target.getLargeArrayAlign(); 548 if (isa<VariableArrayType>(T) && MinWidth != 0) 549 Align = std::max(Align, ArrayAlign); 550 if (ConstantArrayType *CT = dyn_cast<ConstantArrayType>(T)) { 551 unsigned Size = getTypeSize(CT); 552 if (MinWidth != 0 && MinWidth <= Size) 553 Align = std::max(Align, ArrayAlign); 554 } 555 // Incomplete or function types default to 1. 556 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 557 T = cast<ArrayType>(T)->getElementType(); 558 559 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 560 } 561 if (const FieldDecl *FD = dyn_cast<FieldDecl>(VD)) { 562 // In the case of a field in a packed struct, we want the minimum 563 // of the alignment of the field and the alignment of the struct. 564 Align = std::min(Align, 565 getPreferredTypeAlign(FD->getParent()->getTypeForDecl())); 566 } 567 } 568 569 return CharUnits::fromQuantity(Align / Target.getCharWidth()); 570} 571 572std::pair<CharUnits, CharUnits> 573ASTContext::getTypeInfoInChars(const Type *T) { 574 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 575 return std::make_pair(CharUnits::fromQuantity(Info.first / getCharWidth()), 576 CharUnits::fromQuantity(Info.second / getCharWidth())); 577} 578 579std::pair<CharUnits, CharUnits> 580ASTContext::getTypeInfoInChars(QualType T) { 581 return getTypeInfoInChars(T.getTypePtr()); 582} 583 584/// getTypeSize - Return the size of the specified type, in bits. This method 585/// does not work on incomplete types. 586/// 587/// FIXME: Pointers into different addr spaces could have different sizes and 588/// alignment requirements: getPointerInfo should take an AddrSpace, this 589/// should take a QualType, &c. 590std::pair<uint64_t, unsigned> 591ASTContext::getTypeInfo(const Type *T) { 592 uint64_t Width=0; 593 unsigned Align=8; 594 switch (T->getTypeClass()) { 595#define TYPE(Class, Base) 596#define ABSTRACT_TYPE(Class, Base) 597#define NON_CANONICAL_TYPE(Class, Base) 598#define DEPENDENT_TYPE(Class, Base) case Type::Class: 599#include "clang/AST/TypeNodes.def" 600 assert(false && "Should not see dependent types"); 601 break; 602 603 case Type::FunctionNoProto: 604 case Type::FunctionProto: 605 // GCC extension: alignof(function) = 32 bits 606 Width = 0; 607 Align = 32; 608 break; 609 610 case Type::IncompleteArray: 611 case Type::VariableArray: 612 Width = 0; 613 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 614 break; 615 616 case Type::ConstantArray: { 617 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 618 619 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 620 Width = EltInfo.first*CAT->getSize().getZExtValue(); 621 Align = EltInfo.second; 622 break; 623 } 624 case Type::ExtVector: 625 case Type::Vector: { 626 const VectorType *VT = cast<VectorType>(T); 627 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 628 Width = EltInfo.first*VT->getNumElements(); 629 Align = Width; 630 // If the alignment is not a power of 2, round up to the next power of 2. 631 // This happens for non-power-of-2 length vectors. 632 if (Align & (Align-1)) { 633 Align = llvm::NextPowerOf2(Align); 634 Width = llvm::RoundUpToAlignment(Width, Align); 635 } 636 break; 637 } 638 639 case Type::Builtin: 640 switch (cast<BuiltinType>(T)->getKind()) { 641 default: assert(0 && "Unknown builtin type!"); 642 case BuiltinType::Void: 643 // GCC extension: alignof(void) = 8 bits. 644 Width = 0; 645 Align = 8; 646 break; 647 648 case BuiltinType::Bool: 649 Width = Target.getBoolWidth(); 650 Align = Target.getBoolAlign(); 651 break; 652 case BuiltinType::Char_S: 653 case BuiltinType::Char_U: 654 case BuiltinType::UChar: 655 case BuiltinType::SChar: 656 Width = Target.getCharWidth(); 657 Align = Target.getCharAlign(); 658 break; 659 case BuiltinType::WChar: 660 Width = Target.getWCharWidth(); 661 Align = Target.getWCharAlign(); 662 break; 663 case BuiltinType::Char16: 664 Width = Target.getChar16Width(); 665 Align = Target.getChar16Align(); 666 break; 667 case BuiltinType::Char32: 668 Width = Target.getChar32Width(); 669 Align = Target.getChar32Align(); 670 break; 671 case BuiltinType::UShort: 672 case BuiltinType::Short: 673 Width = Target.getShortWidth(); 674 Align = Target.getShortAlign(); 675 break; 676 case BuiltinType::UInt: 677 case BuiltinType::Int: 678 Width = Target.getIntWidth(); 679 Align = Target.getIntAlign(); 680 break; 681 case BuiltinType::ULong: 682 case BuiltinType::Long: 683 Width = Target.getLongWidth(); 684 Align = Target.getLongAlign(); 685 break; 686 case BuiltinType::ULongLong: 687 case BuiltinType::LongLong: 688 Width = Target.getLongLongWidth(); 689 Align = Target.getLongLongAlign(); 690 break; 691 case BuiltinType::Int128: 692 case BuiltinType::UInt128: 693 Width = 128; 694 Align = 128; // int128_t is 128-bit aligned on all targets. 695 break; 696 case BuiltinType::Float: 697 Width = Target.getFloatWidth(); 698 Align = Target.getFloatAlign(); 699 break; 700 case BuiltinType::Double: 701 Width = Target.getDoubleWidth(); 702 Align = Target.getDoubleAlign(); 703 break; 704 case BuiltinType::LongDouble: 705 Width = Target.getLongDoubleWidth(); 706 Align = Target.getLongDoubleAlign(); 707 break; 708 case BuiltinType::NullPtr: 709 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 710 Align = Target.getPointerAlign(0); // == sizeof(void*) 711 break; 712 case BuiltinType::ObjCId: 713 case BuiltinType::ObjCClass: 714 case BuiltinType::ObjCSel: 715 Width = Target.getPointerWidth(0); 716 Align = Target.getPointerAlign(0); 717 break; 718 } 719 break; 720 case Type::ObjCObjectPointer: 721 Width = Target.getPointerWidth(0); 722 Align = Target.getPointerAlign(0); 723 break; 724 case Type::BlockPointer: { 725 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 726 Width = Target.getPointerWidth(AS); 727 Align = Target.getPointerAlign(AS); 728 break; 729 } 730 case Type::LValueReference: 731 case Type::RValueReference: { 732 // alignof and sizeof should never enter this code path here, so we go 733 // the pointer route. 734 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 735 Width = Target.getPointerWidth(AS); 736 Align = Target.getPointerAlign(AS); 737 break; 738 } 739 case Type::Pointer: { 740 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 741 Width = Target.getPointerWidth(AS); 742 Align = Target.getPointerAlign(AS); 743 break; 744 } 745 case Type::MemberPointer: { 746 const MemberPointerType *MPT = cast<MemberPointerType>(T); 747 std::pair<uint64_t, unsigned> PtrDiffInfo = 748 getTypeInfo(getPointerDiffType()); 749 Width = PtrDiffInfo.first * ABI->getMemberPointerSize(MPT); 750 Align = PtrDiffInfo.second; 751 break; 752 } 753 case Type::Complex: { 754 // Complex types have the same alignment as their elements, but twice the 755 // size. 756 std::pair<uint64_t, unsigned> EltInfo = 757 getTypeInfo(cast<ComplexType>(T)->getElementType()); 758 Width = EltInfo.first*2; 759 Align = EltInfo.second; 760 break; 761 } 762 case Type::ObjCObject: 763 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 764 case Type::ObjCInterface: { 765 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 766 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 767 Width = Layout.getSize(); 768 Align = Layout.getAlignment(); 769 break; 770 } 771 case Type::Record: 772 case Type::Enum: { 773 const TagType *TT = cast<TagType>(T); 774 775 if (TT->getDecl()->isInvalidDecl()) { 776 Width = 1; 777 Align = 1; 778 break; 779 } 780 781 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 782 return getTypeInfo(ET->getDecl()->getIntegerType()); 783 784 const RecordType *RT = cast<RecordType>(TT); 785 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 786 Width = Layout.getSize(); 787 Align = Layout.getAlignment(); 788 break; 789 } 790 791 case Type::SubstTemplateTypeParm: 792 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 793 getReplacementType().getTypePtr()); 794 795 case Type::Typedef: { 796 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 797 std::pair<uint64_t, unsigned> Info 798 = getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 799 Align = std::max(Typedef->getMaxAlignment(), Info.second); 800 Width = Info.first; 801 break; 802 } 803 804 case Type::TypeOfExpr: 805 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 806 .getTypePtr()); 807 808 case Type::TypeOf: 809 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 810 811 case Type::Decltype: 812 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 813 .getTypePtr()); 814 815 case Type::Elaborated: 816 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 817 818 case Type::TemplateSpecialization: 819 assert(getCanonicalType(T) != T && 820 "Cannot request the size of a dependent type"); 821 // FIXME: this is likely to be wrong once we support template 822 // aliases, since a template alias could refer to a typedef that 823 // has an __aligned__ attribute on it. 824 return getTypeInfo(getCanonicalType(T)); 825 } 826 827 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 828 return std::make_pair(Width, Align); 829} 830 831/// getTypeSizeInChars - Return the size of the specified type, in characters. 832/// This method does not work on incomplete types. 833CharUnits ASTContext::getTypeSizeInChars(QualType T) { 834 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 835} 836CharUnits ASTContext::getTypeSizeInChars(const Type *T) { 837 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 838} 839 840/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 841/// characters. This method does not work on incomplete types. 842CharUnits ASTContext::getTypeAlignInChars(QualType T) { 843 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 844} 845CharUnits ASTContext::getTypeAlignInChars(const Type *T) { 846 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 847} 848 849/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 850/// type for the current target in bits. This can be different than the ABI 851/// alignment in cases where it is beneficial for performance to overalign 852/// a data type. 853unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 854 unsigned ABIAlign = getTypeAlign(T); 855 856 // Double and long long should be naturally aligned if possible. 857 if (const ComplexType* CT = T->getAs<ComplexType>()) 858 T = CT->getElementType().getTypePtr(); 859 if (T->isSpecificBuiltinType(BuiltinType::Double) || 860 T->isSpecificBuiltinType(BuiltinType::LongLong)) 861 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 862 863 return ABIAlign; 864} 865 866/// ShallowCollectObjCIvars - 867/// Collect all ivars, including those synthesized, in the current class. 868/// 869void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 870 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 871 // FIXME. This need be removed but there are two many places which 872 // assume const-ness of ObjCInterfaceDecl 873 ObjCInterfaceDecl *IDecl = const_cast<ObjCInterfaceDecl *>(OI); 874 for (ObjCIvarDecl *Iv = IDecl->all_declared_ivar_begin(); Iv; 875 Iv= Iv->getNextIvar()) 876 Ivars.push_back(Iv); 877} 878 879/// DeepCollectObjCIvars - 880/// This routine first collects all declared, but not synthesized, ivars in 881/// super class and then collects all ivars, including those synthesized for 882/// current class. This routine is used for implementation of current class 883/// when all ivars, declared and synthesized are known. 884/// 885void ASTContext::DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, 886 bool leafClass, 887 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 888 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 889 DeepCollectObjCIvars(SuperClass, false, Ivars); 890 if (!leafClass) { 891 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 892 E = OI->ivar_end(); I != E; ++I) 893 Ivars.push_back(*I); 894 } 895 else 896 ShallowCollectObjCIvars(OI, Ivars); 897} 898 899/// CollectInheritedProtocols - Collect all protocols in current class and 900/// those inherited by it. 901void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 902 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 903 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 904 // We can use protocol_iterator here instead of 905 // all_referenced_protocol_iterator since we are walking all categories. 906 for (ObjCInterfaceDecl::all_protocol_iterator P = OI->all_referenced_protocol_begin(), 907 PE = OI->all_referenced_protocol_end(); P != PE; ++P) { 908 ObjCProtocolDecl *Proto = (*P); 909 Protocols.insert(Proto); 910 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 911 PE = Proto->protocol_end(); P != PE; ++P) { 912 Protocols.insert(*P); 913 CollectInheritedProtocols(*P, Protocols); 914 } 915 } 916 917 // Categories of this Interface. 918 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 919 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 920 CollectInheritedProtocols(CDeclChain, Protocols); 921 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 922 while (SD) { 923 CollectInheritedProtocols(SD, Protocols); 924 SD = SD->getSuperClass(); 925 } 926 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 927 for (ObjCCategoryDecl::protocol_iterator P = OC->protocol_begin(), 928 PE = OC->protocol_end(); P != PE; ++P) { 929 ObjCProtocolDecl *Proto = (*P); 930 Protocols.insert(Proto); 931 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 932 PE = Proto->protocol_end(); P != PE; ++P) 933 CollectInheritedProtocols(*P, Protocols); 934 } 935 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 936 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 937 PE = OP->protocol_end(); P != PE; ++P) { 938 ObjCProtocolDecl *Proto = (*P); 939 Protocols.insert(Proto); 940 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 941 PE = Proto->protocol_end(); P != PE; ++P) 942 CollectInheritedProtocols(*P, Protocols); 943 } 944 } 945} 946 947unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) { 948 unsigned count = 0; 949 // Count ivars declared in class extension. 950 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl; 951 CDecl = CDecl->getNextClassExtension()) 952 count += CDecl->ivar_size(); 953 954 // Count ivar defined in this class's implementation. This 955 // includes synthesized ivars. 956 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 957 count += ImplDecl->ivar_size(); 958 959 return count; 960} 961 962/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 963ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 964 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 965 I = ObjCImpls.find(D); 966 if (I != ObjCImpls.end()) 967 return cast<ObjCImplementationDecl>(I->second); 968 return 0; 969} 970/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 971ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 972 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 973 I = ObjCImpls.find(D); 974 if (I != ObjCImpls.end()) 975 return cast<ObjCCategoryImplDecl>(I->second); 976 return 0; 977} 978 979/// \brief Set the implementation of ObjCInterfaceDecl. 980void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 981 ObjCImplementationDecl *ImplD) { 982 assert(IFaceD && ImplD && "Passed null params"); 983 ObjCImpls[IFaceD] = ImplD; 984} 985/// \brief Set the implementation of ObjCCategoryDecl. 986void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 987 ObjCCategoryImplDecl *ImplD) { 988 assert(CatD && ImplD && "Passed null params"); 989 ObjCImpls[CatD] = ImplD; 990} 991 992/// \brief Allocate an uninitialized TypeSourceInfo. 993/// 994/// The caller should initialize the memory held by TypeSourceInfo using 995/// the TypeLoc wrappers. 996/// 997/// \param T the type that will be the basis for type source info. This type 998/// should refer to how the declarator was written in source code, not to 999/// what type semantic analysis resolved the declarator to. 1000TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 1001 unsigned DataSize) { 1002 if (!DataSize) 1003 DataSize = TypeLoc::getFullDataSizeForType(T); 1004 else 1005 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 1006 "incorrect data size provided to CreateTypeSourceInfo!"); 1007 1008 TypeSourceInfo *TInfo = 1009 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 1010 new (TInfo) TypeSourceInfo(T); 1011 return TInfo; 1012} 1013 1014TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1015 SourceLocation L) { 1016 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1017 DI->getTypeLoc().initialize(L); 1018 return DI; 1019} 1020 1021const ASTRecordLayout & 1022ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 1023 return getObjCLayout(D, 0); 1024} 1025 1026const ASTRecordLayout & 1027ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 1028 return getObjCLayout(D->getClassInterface(), D); 1029} 1030 1031//===----------------------------------------------------------------------===// 1032// Type creation/memoization methods 1033//===----------------------------------------------------------------------===// 1034 1035QualType ASTContext::getExtQualType(const Type *TypeNode, Qualifiers Quals) { 1036 unsigned Fast = Quals.getFastQualifiers(); 1037 Quals.removeFastQualifiers(); 1038 1039 // Check if we've already instantiated this type. 1040 llvm::FoldingSetNodeID ID; 1041 ExtQuals::Profile(ID, TypeNode, Quals); 1042 void *InsertPos = 0; 1043 if (ExtQuals *EQ = ExtQualNodes.FindNodeOrInsertPos(ID, InsertPos)) { 1044 assert(EQ->getQualifiers() == Quals); 1045 QualType T = QualType(EQ, Fast); 1046 return T; 1047 } 1048 1049 ExtQuals *New = new (*this, TypeAlignment) ExtQuals(*this, TypeNode, Quals); 1050 ExtQualNodes.InsertNode(New, InsertPos); 1051 QualType T = QualType(New, Fast); 1052 return T; 1053} 1054 1055QualType ASTContext::getVolatileType(QualType T) { 1056 QualType CanT = getCanonicalType(T); 1057 if (CanT.isVolatileQualified()) return T; 1058 1059 QualifierCollector Quals; 1060 const Type *TypeNode = Quals.strip(T); 1061 Quals.addVolatile(); 1062 1063 return getExtQualType(TypeNode, Quals); 1064} 1065 1066QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 1067 QualType CanT = getCanonicalType(T); 1068 if (CanT.getAddressSpace() == AddressSpace) 1069 return T; 1070 1071 // If we are composing extended qualifiers together, merge together 1072 // into one ExtQuals node. 1073 QualifierCollector Quals; 1074 const Type *TypeNode = Quals.strip(T); 1075 1076 // If this type already has an address space specified, it cannot get 1077 // another one. 1078 assert(!Quals.hasAddressSpace() && 1079 "Type cannot be in multiple addr spaces!"); 1080 Quals.addAddressSpace(AddressSpace); 1081 1082 return getExtQualType(TypeNode, Quals); 1083} 1084 1085QualType ASTContext::getObjCGCQualType(QualType T, 1086 Qualifiers::GC GCAttr) { 1087 QualType CanT = getCanonicalType(T); 1088 if (CanT.getObjCGCAttr() == GCAttr) 1089 return T; 1090 1091 if (T->isPointerType()) { 1092 QualType Pointee = T->getAs<PointerType>()->getPointeeType(); 1093 if (Pointee->isAnyPointerType()) { 1094 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1095 return getPointerType(ResultType); 1096 } 1097 } 1098 1099 // If we are composing extended qualifiers together, merge together 1100 // into one ExtQuals node. 1101 QualifierCollector Quals; 1102 const Type *TypeNode = Quals.strip(T); 1103 1104 // If this type already has an ObjCGC specified, it cannot get 1105 // another one. 1106 assert(!Quals.hasObjCGCAttr() && 1107 "Type cannot have multiple ObjCGCs!"); 1108 Quals.addObjCGCAttr(GCAttr); 1109 1110 return getExtQualType(TypeNode, Quals); 1111} 1112 1113static QualType getExtFunctionType(ASTContext& Context, QualType T, 1114 const FunctionType::ExtInfo &Info) { 1115 QualType ResultType; 1116 if (const PointerType *Pointer = T->getAs<PointerType>()) { 1117 QualType Pointee = Pointer->getPointeeType(); 1118 ResultType = getExtFunctionType(Context, Pointee, Info); 1119 if (ResultType == Pointee) 1120 return T; 1121 1122 ResultType = Context.getPointerType(ResultType); 1123 } else if (const BlockPointerType *BlockPointer 1124 = T->getAs<BlockPointerType>()) { 1125 QualType Pointee = BlockPointer->getPointeeType(); 1126 ResultType = getExtFunctionType(Context, Pointee, Info); 1127 if (ResultType == Pointee) 1128 return T; 1129 1130 ResultType = Context.getBlockPointerType(ResultType); 1131 } else if (const MemberPointerType *MemberPointer 1132 = T->getAs<MemberPointerType>()) { 1133 QualType Pointee = MemberPointer->getPointeeType(); 1134 ResultType = getExtFunctionType(Context, Pointee, Info); 1135 if (ResultType == Pointee) 1136 return T; 1137 1138 ResultType = Context.getMemberPointerType(ResultType, 1139 MemberPointer->getClass()); 1140 } else if (const FunctionType *F = T->getAs<FunctionType>()) { 1141 if (F->getExtInfo() == Info) 1142 return T; 1143 1144 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(F)) { 1145 ResultType = Context.getFunctionNoProtoType(FNPT->getResultType(), 1146 Info); 1147 } else { 1148 const FunctionProtoType *FPT = cast<FunctionProtoType>(F); 1149 ResultType 1150 = Context.getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1151 FPT->getNumArgs(), FPT->isVariadic(), 1152 FPT->getTypeQuals(), 1153 FPT->hasExceptionSpec(), 1154 FPT->hasAnyExceptionSpec(), 1155 FPT->getNumExceptions(), 1156 FPT->exception_begin(), 1157 Info); 1158 } 1159 } else 1160 return T; 1161 1162 return Context.getQualifiedType(ResultType, T.getLocalQualifiers()); 1163} 1164 1165QualType ASTContext::getNoReturnType(QualType T, bool AddNoReturn) { 1166 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1167 return getExtFunctionType(*this, T, 1168 Info.withNoReturn(AddNoReturn)); 1169} 1170 1171QualType ASTContext::getCallConvType(QualType T, CallingConv CallConv) { 1172 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1173 return getExtFunctionType(*this, T, 1174 Info.withCallingConv(CallConv)); 1175} 1176 1177QualType ASTContext::getRegParmType(QualType T, unsigned RegParm) { 1178 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1179 return getExtFunctionType(*this, T, 1180 Info.withRegParm(RegParm)); 1181} 1182 1183/// getComplexType - Return the uniqued reference to the type for a complex 1184/// number with the specified element type. 1185QualType ASTContext::getComplexType(QualType T) { 1186 // Unique pointers, to guarantee there is only one pointer of a particular 1187 // structure. 1188 llvm::FoldingSetNodeID ID; 1189 ComplexType::Profile(ID, T); 1190 1191 void *InsertPos = 0; 1192 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1193 return QualType(CT, 0); 1194 1195 // If the pointee type isn't canonical, this won't be a canonical type either, 1196 // so fill in the canonical type field. 1197 QualType Canonical; 1198 if (!T.isCanonical()) { 1199 Canonical = getComplexType(getCanonicalType(T)); 1200 1201 // Get the new insert position for the node we care about. 1202 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1203 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1204 } 1205 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1206 Types.push_back(New); 1207 ComplexTypes.InsertNode(New, InsertPos); 1208 return QualType(New, 0); 1209} 1210 1211/// getPointerType - Return the uniqued reference to the type for a pointer to 1212/// the specified type. 1213QualType ASTContext::getPointerType(QualType T) { 1214 // Unique pointers, to guarantee there is only one pointer of a particular 1215 // structure. 1216 llvm::FoldingSetNodeID ID; 1217 PointerType::Profile(ID, T); 1218 1219 void *InsertPos = 0; 1220 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1221 return QualType(PT, 0); 1222 1223 // If the pointee type isn't canonical, this won't be a canonical type either, 1224 // so fill in the canonical type field. 1225 QualType Canonical; 1226 if (!T.isCanonical()) { 1227 Canonical = getPointerType(getCanonicalType(T)); 1228 1229 // Get the new insert position for the node we care about. 1230 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1231 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1232 } 1233 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1234 Types.push_back(New); 1235 PointerTypes.InsertNode(New, InsertPos); 1236 return QualType(New, 0); 1237} 1238 1239/// getBlockPointerType - Return the uniqued reference to the type for 1240/// a pointer to the specified block. 1241QualType ASTContext::getBlockPointerType(QualType T) { 1242 assert(T->isFunctionType() && "block of function types only"); 1243 // Unique pointers, to guarantee there is only one block of a particular 1244 // structure. 1245 llvm::FoldingSetNodeID ID; 1246 BlockPointerType::Profile(ID, T); 1247 1248 void *InsertPos = 0; 1249 if (BlockPointerType *PT = 1250 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1251 return QualType(PT, 0); 1252 1253 // If the block pointee type isn't canonical, this won't be a canonical 1254 // type either so fill in the canonical type field. 1255 QualType Canonical; 1256 if (!T.isCanonical()) { 1257 Canonical = getBlockPointerType(getCanonicalType(T)); 1258 1259 // Get the new insert position for the node we care about. 1260 BlockPointerType *NewIP = 1261 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1262 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1263 } 1264 BlockPointerType *New 1265 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1266 Types.push_back(New); 1267 BlockPointerTypes.InsertNode(New, InsertPos); 1268 return QualType(New, 0); 1269} 1270 1271/// getLValueReferenceType - Return the uniqued reference to the type for an 1272/// lvalue reference to the specified type. 1273QualType ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) { 1274 // Unique pointers, to guarantee there is only one pointer of a particular 1275 // structure. 1276 llvm::FoldingSetNodeID ID; 1277 ReferenceType::Profile(ID, T, SpelledAsLValue); 1278 1279 void *InsertPos = 0; 1280 if (LValueReferenceType *RT = 1281 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1282 return QualType(RT, 0); 1283 1284 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1285 1286 // If the referencee type isn't canonical, this won't be a canonical type 1287 // either, so fill in the canonical type field. 1288 QualType Canonical; 1289 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1290 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1291 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1292 1293 // Get the new insert position for the node we care about. 1294 LValueReferenceType *NewIP = 1295 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1296 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1297 } 1298 1299 LValueReferenceType *New 1300 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1301 SpelledAsLValue); 1302 Types.push_back(New); 1303 LValueReferenceTypes.InsertNode(New, InsertPos); 1304 1305 return QualType(New, 0); 1306} 1307 1308/// getRValueReferenceType - Return the uniqued reference to the type for an 1309/// rvalue reference to the specified type. 1310QualType ASTContext::getRValueReferenceType(QualType T) { 1311 // Unique pointers, to guarantee there is only one pointer of a particular 1312 // structure. 1313 llvm::FoldingSetNodeID ID; 1314 ReferenceType::Profile(ID, T, false); 1315 1316 void *InsertPos = 0; 1317 if (RValueReferenceType *RT = 1318 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1319 return QualType(RT, 0); 1320 1321 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1322 1323 // If the referencee type isn't canonical, this won't be a canonical type 1324 // either, so fill in the canonical type field. 1325 QualType Canonical; 1326 if (InnerRef || !T.isCanonical()) { 1327 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1328 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1329 1330 // Get the new insert position for the node we care about. 1331 RValueReferenceType *NewIP = 1332 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1333 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1334 } 1335 1336 RValueReferenceType *New 1337 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1338 Types.push_back(New); 1339 RValueReferenceTypes.InsertNode(New, InsertPos); 1340 return QualType(New, 0); 1341} 1342 1343/// getMemberPointerType - Return the uniqued reference to the type for a 1344/// member pointer to the specified type, in the specified class. 1345QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) { 1346 // Unique pointers, to guarantee there is only one pointer of a particular 1347 // structure. 1348 llvm::FoldingSetNodeID ID; 1349 MemberPointerType::Profile(ID, T, Cls); 1350 1351 void *InsertPos = 0; 1352 if (MemberPointerType *PT = 1353 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1354 return QualType(PT, 0); 1355 1356 // If the pointee or class type isn't canonical, this won't be a canonical 1357 // type either, so fill in the canonical type field. 1358 QualType Canonical; 1359 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1360 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1361 1362 // Get the new insert position for the node we care about. 1363 MemberPointerType *NewIP = 1364 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1365 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1366 } 1367 MemberPointerType *New 1368 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1369 Types.push_back(New); 1370 MemberPointerTypes.InsertNode(New, InsertPos); 1371 return QualType(New, 0); 1372} 1373 1374/// getConstantArrayType - Return the unique reference to the type for an 1375/// array of the specified element type. 1376QualType ASTContext::getConstantArrayType(QualType EltTy, 1377 const llvm::APInt &ArySizeIn, 1378 ArrayType::ArraySizeModifier ASM, 1379 unsigned EltTypeQuals) { 1380 assert((EltTy->isDependentType() || 1381 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1382 "Constant array of VLAs is illegal!"); 1383 1384 // Convert the array size into a canonical width matching the pointer size for 1385 // the target. 1386 llvm::APInt ArySize(ArySizeIn); 1387 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1388 1389 llvm::FoldingSetNodeID ID; 1390 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1391 1392 void *InsertPos = 0; 1393 if (ConstantArrayType *ATP = 1394 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1395 return QualType(ATP, 0); 1396 1397 // If the element type isn't canonical, this won't be a canonical type either, 1398 // so fill in the canonical type field. 1399 QualType Canonical; 1400 if (!EltTy.isCanonical()) { 1401 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1402 ASM, EltTypeQuals); 1403 // Get the new insert position for the node we care about. 1404 ConstantArrayType *NewIP = 1405 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1406 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1407 } 1408 1409 ConstantArrayType *New = new(*this,TypeAlignment) 1410 ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1411 ConstantArrayTypes.InsertNode(New, InsertPos); 1412 Types.push_back(New); 1413 return QualType(New, 0); 1414} 1415 1416/// getIncompleteArrayType - Returns a unique reference to the type for a 1417/// incomplete array of the specified element type. 1418QualType ASTContext::getUnknownSizeVariableArrayType(QualType Ty) { 1419 QualType ElemTy = getBaseElementType(Ty); 1420 DeclarationName Name; 1421 llvm::SmallVector<QualType, 8> ATypes; 1422 QualType ATy = Ty; 1423 while (const ArrayType *AT = getAsArrayType(ATy)) { 1424 ATypes.push_back(ATy); 1425 ATy = AT->getElementType(); 1426 } 1427 for (int i = ATypes.size() - 1; i >= 0; i--) { 1428 if (const VariableArrayType *VAT = getAsVariableArrayType(ATypes[i])) { 1429 ElemTy = getVariableArrayType(ElemTy, /*ArraySize*/0, ArrayType::Star, 1430 0, VAT->getBracketsRange()); 1431 } 1432 else if (const ConstantArrayType *CAT = getAsConstantArrayType(ATypes[i])) { 1433 llvm::APSInt ConstVal(CAT->getSize()); 1434 ElemTy = getConstantArrayType(ElemTy, ConstVal, ArrayType::Normal, 0); 1435 } 1436 else if (getAsIncompleteArrayType(ATypes[i])) { 1437 ElemTy = getVariableArrayType(ElemTy, /*ArraySize*/0, ArrayType::Normal, 1438 0, SourceRange()); 1439 } 1440 else 1441 assert(false && "DependentArrayType is seen"); 1442 } 1443 return ElemTy; 1444} 1445 1446/// getVariableArrayDecayedType - Returns a vla type where known sizes 1447/// are replaced with [*] 1448QualType ASTContext::getVariableArrayDecayedType(QualType Ty) { 1449 if (Ty->isPointerType()) { 1450 QualType BaseType = Ty->getAs<PointerType>()->getPointeeType(); 1451 if (isa<VariableArrayType>(BaseType)) { 1452 ArrayType *AT = dyn_cast<ArrayType>(BaseType); 1453 VariableArrayType *VAT = cast<VariableArrayType>(AT); 1454 if (VAT->getSizeExpr()) { 1455 Ty = getUnknownSizeVariableArrayType(BaseType); 1456 Ty = getPointerType(Ty); 1457 } 1458 } 1459 } 1460 return Ty; 1461} 1462 1463 1464/// getVariableArrayType - Returns a non-unique reference to the type for a 1465/// variable array of the specified element type. 1466QualType ASTContext::getVariableArrayType(QualType EltTy, 1467 Expr *NumElts, 1468 ArrayType::ArraySizeModifier ASM, 1469 unsigned EltTypeQuals, 1470 SourceRange Brackets) { 1471 // Since we don't unique expressions, it isn't possible to unique VLA's 1472 // that have an expression provided for their size. 1473 QualType CanonType; 1474 1475 if (!EltTy.isCanonical()) { 1476 if (NumElts) 1477 NumElts->Retain(); 1478 CanonType = getVariableArrayType(getCanonicalType(EltTy), NumElts, ASM, 1479 EltTypeQuals, Brackets); 1480 } 1481 1482 VariableArrayType *New = new(*this, TypeAlignment) 1483 VariableArrayType(EltTy, CanonType, NumElts, ASM, EltTypeQuals, Brackets); 1484 1485 VariableArrayTypes.push_back(New); 1486 Types.push_back(New); 1487 return QualType(New, 0); 1488} 1489 1490/// getDependentSizedArrayType - Returns a non-unique reference to 1491/// the type for a dependently-sized array of the specified element 1492/// type. 1493QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1494 Expr *NumElts, 1495 ArrayType::ArraySizeModifier ASM, 1496 unsigned EltTypeQuals, 1497 SourceRange Brackets) { 1498 assert((!NumElts || NumElts->isTypeDependent() || 1499 NumElts->isValueDependent()) && 1500 "Size must be type- or value-dependent!"); 1501 1502 void *InsertPos = 0; 1503 DependentSizedArrayType *Canon = 0; 1504 llvm::FoldingSetNodeID ID; 1505 1506 if (NumElts) { 1507 // Dependently-sized array types that do not have a specified 1508 // number of elements will have their sizes deduced from an 1509 // initializer. 1510 DependentSizedArrayType::Profile(ID, *this, getCanonicalType(EltTy), ASM, 1511 EltTypeQuals, NumElts); 1512 1513 Canon = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1514 } 1515 1516 DependentSizedArrayType *New; 1517 if (Canon) { 1518 // We already have a canonical version of this array type; use it as 1519 // the canonical type for a newly-built type. 1520 New = new (*this, TypeAlignment) 1521 DependentSizedArrayType(*this, EltTy, QualType(Canon, 0), 1522 NumElts, ASM, EltTypeQuals, Brackets); 1523 } else { 1524 QualType CanonEltTy = getCanonicalType(EltTy); 1525 if (CanonEltTy == EltTy) { 1526 New = new (*this, TypeAlignment) 1527 DependentSizedArrayType(*this, EltTy, QualType(), 1528 NumElts, ASM, EltTypeQuals, Brackets); 1529 1530 if (NumElts) { 1531 DependentSizedArrayType *CanonCheck 1532 = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1533 assert(!CanonCheck && "Dependent-sized canonical array type broken"); 1534 (void)CanonCheck; 1535 DependentSizedArrayTypes.InsertNode(New, InsertPos); 1536 } 1537 } else { 1538 QualType Canon = getDependentSizedArrayType(CanonEltTy, NumElts, 1539 ASM, EltTypeQuals, 1540 SourceRange()); 1541 New = new (*this, TypeAlignment) 1542 DependentSizedArrayType(*this, EltTy, Canon, 1543 NumElts, ASM, EltTypeQuals, Brackets); 1544 } 1545 } 1546 1547 Types.push_back(New); 1548 return QualType(New, 0); 1549} 1550 1551QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1552 ArrayType::ArraySizeModifier ASM, 1553 unsigned EltTypeQuals) { 1554 llvm::FoldingSetNodeID ID; 1555 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1556 1557 void *InsertPos = 0; 1558 if (IncompleteArrayType *ATP = 1559 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1560 return QualType(ATP, 0); 1561 1562 // If the element type isn't canonical, this won't be a canonical type 1563 // either, so fill in the canonical type field. 1564 QualType Canonical; 1565 1566 if (!EltTy.isCanonical()) { 1567 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1568 ASM, EltTypeQuals); 1569 1570 // Get the new insert position for the node we care about. 1571 IncompleteArrayType *NewIP = 1572 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1573 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1574 } 1575 1576 IncompleteArrayType *New = new (*this, TypeAlignment) 1577 IncompleteArrayType(EltTy, Canonical, ASM, EltTypeQuals); 1578 1579 IncompleteArrayTypes.InsertNode(New, InsertPos); 1580 Types.push_back(New); 1581 return QualType(New, 0); 1582} 1583 1584/// getVectorType - Return the unique reference to a vector type of 1585/// the specified element type and size. VectorType must be a built-in type. 1586QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1587 VectorType::AltiVecSpecific AltiVecSpec) { 1588 BuiltinType *baseType; 1589 1590 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1591 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1592 1593 // Check if we've already instantiated a vector of this type. 1594 llvm::FoldingSetNodeID ID; 1595 VectorType::Profile(ID, vecType, NumElts, Type::Vector, AltiVecSpec); 1596 1597 void *InsertPos = 0; 1598 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1599 return QualType(VTP, 0); 1600 1601 // If the element type isn't canonical, this won't be a canonical type either, 1602 // so fill in the canonical type field. 1603 QualType Canonical; 1604 if (!vecType.isCanonical()) { 1605 Canonical = getVectorType(getCanonicalType(vecType), NumElts, 1606 VectorType::NotAltiVec); 1607 1608 // Get the new insert position for the node we care about. 1609 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1610 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1611 } 1612 VectorType *New = new (*this, TypeAlignment) 1613 VectorType(vecType, NumElts, Canonical, AltiVecSpec); 1614 VectorTypes.InsertNode(New, InsertPos); 1615 Types.push_back(New); 1616 return QualType(New, 0); 1617} 1618 1619/// getExtVectorType - Return the unique reference to an extended vector type of 1620/// the specified element type and size. VectorType must be a built-in type. 1621QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1622 BuiltinType *baseType; 1623 1624 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1625 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1626 1627 // Check if we've already instantiated a vector of this type. 1628 llvm::FoldingSetNodeID ID; 1629 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, 1630 VectorType::NotAltiVec); 1631 void *InsertPos = 0; 1632 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1633 return QualType(VTP, 0); 1634 1635 // If the element type isn't canonical, this won't be a canonical type either, 1636 // so fill in the canonical type field. 1637 QualType Canonical; 1638 if (!vecType.isCanonical()) { 1639 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1640 1641 // Get the new insert position for the node we care about. 1642 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1643 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1644 } 1645 ExtVectorType *New = new (*this, TypeAlignment) 1646 ExtVectorType(vecType, NumElts, Canonical); 1647 VectorTypes.InsertNode(New, InsertPos); 1648 Types.push_back(New); 1649 return QualType(New, 0); 1650} 1651 1652QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1653 Expr *SizeExpr, 1654 SourceLocation AttrLoc) { 1655 llvm::FoldingSetNodeID ID; 1656 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1657 SizeExpr); 1658 1659 void *InsertPos = 0; 1660 DependentSizedExtVectorType *Canon 1661 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1662 DependentSizedExtVectorType *New; 1663 if (Canon) { 1664 // We already have a canonical version of this array type; use it as 1665 // the canonical type for a newly-built type. 1666 New = new (*this, TypeAlignment) 1667 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1668 SizeExpr, AttrLoc); 1669 } else { 1670 QualType CanonVecTy = getCanonicalType(vecType); 1671 if (CanonVecTy == vecType) { 1672 New = new (*this, TypeAlignment) 1673 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1674 AttrLoc); 1675 1676 DependentSizedExtVectorType *CanonCheck 1677 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1678 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1679 (void)CanonCheck; 1680 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1681 } else { 1682 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1683 SourceLocation()); 1684 New = new (*this, TypeAlignment) 1685 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1686 } 1687 } 1688 1689 Types.push_back(New); 1690 return QualType(New, 0); 1691} 1692 1693/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1694/// 1695QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, 1696 const FunctionType::ExtInfo &Info) { 1697 const CallingConv CallConv = Info.getCC(); 1698 // Unique functions, to guarantee there is only one function of a particular 1699 // structure. 1700 llvm::FoldingSetNodeID ID; 1701 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1702 1703 void *InsertPos = 0; 1704 if (FunctionNoProtoType *FT = 1705 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1706 return QualType(FT, 0); 1707 1708 QualType Canonical; 1709 if (!ResultTy.isCanonical() || 1710 getCanonicalCallConv(CallConv) != CallConv) { 1711 Canonical = 1712 getFunctionNoProtoType(getCanonicalType(ResultTy), 1713 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1714 1715 // Get the new insert position for the node we care about. 1716 FunctionNoProtoType *NewIP = 1717 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1718 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1719 } 1720 1721 FunctionNoProtoType *New = new (*this, TypeAlignment) 1722 FunctionNoProtoType(ResultTy, Canonical, Info); 1723 Types.push_back(New); 1724 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1725 return QualType(New, 0); 1726} 1727 1728/// getFunctionType - Return a normal function type with a typed argument 1729/// list. isVariadic indicates whether the argument list includes '...'. 1730QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1731 unsigned NumArgs, bool isVariadic, 1732 unsigned TypeQuals, bool hasExceptionSpec, 1733 bool hasAnyExceptionSpec, unsigned NumExs, 1734 const QualType *ExArray, 1735 const FunctionType::ExtInfo &Info) { 1736 1737 const CallingConv CallConv= Info.getCC(); 1738 // Unique functions, to guarantee there is only one function of a particular 1739 // structure. 1740 llvm::FoldingSetNodeID ID; 1741 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1742 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1743 NumExs, ExArray, Info); 1744 1745 void *InsertPos = 0; 1746 if (FunctionProtoType *FTP = 1747 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1748 return QualType(FTP, 0); 1749 1750 // Determine whether the type being created is already canonical or not. 1751 bool isCanonical = !hasExceptionSpec && ResultTy.isCanonical(); 1752 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1753 if (!ArgArray[i].isCanonicalAsParam()) 1754 isCanonical = false; 1755 1756 // If this type isn't canonical, get the canonical version of it. 1757 // The exception spec is not part of the canonical type. 1758 QualType Canonical; 1759 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1760 llvm::SmallVector<QualType, 16> CanonicalArgs; 1761 CanonicalArgs.reserve(NumArgs); 1762 for (unsigned i = 0; i != NumArgs; ++i) 1763 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1764 1765 Canonical = getFunctionType(getCanonicalType(ResultTy), 1766 CanonicalArgs.data(), NumArgs, 1767 isVariadic, TypeQuals, false, 1768 false, 0, 0, 1769 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1770 1771 // Get the new insert position for the node we care about. 1772 FunctionProtoType *NewIP = 1773 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1774 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1775 } 1776 1777 // FunctionProtoType objects are allocated with extra bytes after them 1778 // for two variable size arrays (for parameter and exception types) at the 1779 // end of them. 1780 FunctionProtoType *FTP = 1781 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1782 NumArgs*sizeof(QualType) + 1783 NumExs*sizeof(QualType), TypeAlignment); 1784 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1785 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1786 ExArray, NumExs, Canonical, Info); 1787 Types.push_back(FTP); 1788 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1789 return QualType(FTP, 0); 1790} 1791 1792#ifndef NDEBUG 1793static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1794 if (!isa<CXXRecordDecl>(D)) return false; 1795 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1796 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1797 return true; 1798 if (RD->getDescribedClassTemplate() && 1799 !isa<ClassTemplateSpecializationDecl>(RD)) 1800 return true; 1801 return false; 1802} 1803#endif 1804 1805/// getInjectedClassNameType - Return the unique reference to the 1806/// injected class name type for the specified templated declaration. 1807QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1808 QualType TST) { 1809 assert(NeedsInjectedClassNameType(Decl)); 1810 if (Decl->TypeForDecl) { 1811 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1812 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDeclaration()) { 1813 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1814 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1815 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1816 } else { 1817 Decl->TypeForDecl = 1818 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 1819 Types.push_back(Decl->TypeForDecl); 1820 } 1821 return QualType(Decl->TypeForDecl, 0); 1822} 1823 1824/// getTypeDeclType - Return the unique reference to the type for the 1825/// specified type declaration. 1826QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) { 1827 assert(Decl && "Passed null for Decl param"); 1828 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 1829 1830 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1831 return getTypedefType(Typedef); 1832 1833 assert(!isa<TemplateTypeParmDecl>(Decl) && 1834 "Template type parameter types are always available."); 1835 1836 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1837 assert(!Record->getPreviousDeclaration() && 1838 "struct/union has previous declaration"); 1839 assert(!NeedsInjectedClassNameType(Record)); 1840 return getRecordType(Record); 1841 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1842 assert(!Enum->getPreviousDeclaration() && 1843 "enum has previous declaration"); 1844 return getEnumType(Enum); 1845 } else if (const UnresolvedUsingTypenameDecl *Using = 1846 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1847 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1848 } else 1849 llvm_unreachable("TypeDecl without a type?"); 1850 1851 Types.push_back(Decl->TypeForDecl); 1852 return QualType(Decl->TypeForDecl, 0); 1853} 1854 1855/// getTypedefType - Return the unique reference to the type for the 1856/// specified typename decl. 1857QualType 1858ASTContext::getTypedefType(const TypedefDecl *Decl, QualType Canonical) { 1859 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1860 1861 if (Canonical.isNull()) 1862 Canonical = getCanonicalType(Decl->getUnderlyingType()); 1863 Decl->TypeForDecl = new(*this, TypeAlignment) 1864 TypedefType(Type::Typedef, Decl, Canonical); 1865 Types.push_back(Decl->TypeForDecl); 1866 return QualType(Decl->TypeForDecl, 0); 1867} 1868 1869QualType ASTContext::getRecordType(const RecordDecl *Decl) { 1870 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1871 1872 if (const RecordDecl *PrevDecl = Decl->getPreviousDeclaration()) 1873 if (PrevDecl->TypeForDecl) 1874 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 1875 1876 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Decl); 1877 Types.push_back(Decl->TypeForDecl); 1878 return QualType(Decl->TypeForDecl, 0); 1879} 1880 1881QualType ASTContext::getEnumType(const EnumDecl *Decl) { 1882 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1883 1884 if (const EnumDecl *PrevDecl = Decl->getPreviousDeclaration()) 1885 if (PrevDecl->TypeForDecl) 1886 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 1887 1888 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Decl); 1889 Types.push_back(Decl->TypeForDecl); 1890 return QualType(Decl->TypeForDecl, 0); 1891} 1892 1893/// \brief Retrieve a substitution-result type. 1894QualType 1895ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1896 QualType Replacement) { 1897 assert(Replacement.isCanonical() 1898 && "replacement types must always be canonical"); 1899 1900 llvm::FoldingSetNodeID ID; 1901 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1902 void *InsertPos = 0; 1903 SubstTemplateTypeParmType *SubstParm 1904 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1905 1906 if (!SubstParm) { 1907 SubstParm = new (*this, TypeAlignment) 1908 SubstTemplateTypeParmType(Parm, Replacement); 1909 Types.push_back(SubstParm); 1910 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1911 } 1912 1913 return QualType(SubstParm, 0); 1914} 1915 1916/// \brief Retrieve the template type parameter type for a template 1917/// parameter or parameter pack with the given depth, index, and (optionally) 1918/// name. 1919QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1920 bool ParameterPack, 1921 IdentifierInfo *Name) { 1922 llvm::FoldingSetNodeID ID; 1923 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1924 void *InsertPos = 0; 1925 TemplateTypeParmType *TypeParm 1926 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1927 1928 if (TypeParm) 1929 return QualType(TypeParm, 0); 1930 1931 if (Name) { 1932 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1933 TypeParm = new (*this, TypeAlignment) 1934 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 1935 1936 TemplateTypeParmType *TypeCheck 1937 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1938 assert(!TypeCheck && "Template type parameter canonical type broken"); 1939 (void)TypeCheck; 1940 } else 1941 TypeParm = new (*this, TypeAlignment) 1942 TemplateTypeParmType(Depth, Index, ParameterPack); 1943 1944 Types.push_back(TypeParm); 1945 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1946 1947 return QualType(TypeParm, 0); 1948} 1949 1950TypeSourceInfo * 1951ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 1952 SourceLocation NameLoc, 1953 const TemplateArgumentListInfo &Args, 1954 QualType CanonType) { 1955 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 1956 1957 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 1958 TemplateSpecializationTypeLoc TL 1959 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 1960 TL.setTemplateNameLoc(NameLoc); 1961 TL.setLAngleLoc(Args.getLAngleLoc()); 1962 TL.setRAngleLoc(Args.getRAngleLoc()); 1963 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 1964 TL.setArgLocInfo(i, Args[i].getLocInfo()); 1965 return DI; 1966} 1967 1968QualType 1969ASTContext::getTemplateSpecializationType(TemplateName Template, 1970 const TemplateArgumentListInfo &Args, 1971 QualType Canon) { 1972 unsigned NumArgs = Args.size(); 1973 1974 llvm::SmallVector<TemplateArgument, 4> ArgVec; 1975 ArgVec.reserve(NumArgs); 1976 for (unsigned i = 0; i != NumArgs; ++i) 1977 ArgVec.push_back(Args[i].getArgument()); 1978 1979 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 1980 Canon); 1981} 1982 1983QualType 1984ASTContext::getTemplateSpecializationType(TemplateName Template, 1985 const TemplateArgument *Args, 1986 unsigned NumArgs, 1987 QualType Canon) { 1988 if (!Canon.isNull()) 1989 Canon = getCanonicalType(Canon); 1990 else 1991 Canon = getCanonicalTemplateSpecializationType(Template, Args, NumArgs); 1992 1993 // Allocate the (non-canonical) template specialization type, but don't 1994 // try to unique it: these types typically have location information that 1995 // we don't unique and don't want to lose. 1996 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1997 sizeof(TemplateArgument) * NumArgs), 1998 TypeAlignment); 1999 TemplateSpecializationType *Spec 2000 = new (Mem) TemplateSpecializationType(Template, 2001 Args, NumArgs, 2002 Canon); 2003 2004 Types.push_back(Spec); 2005 return QualType(Spec, 0); 2006} 2007 2008QualType 2009ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template, 2010 const TemplateArgument *Args, 2011 unsigned NumArgs) { 2012 // Build the canonical template specialization type. 2013 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 2014 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 2015 CanonArgs.reserve(NumArgs); 2016 for (unsigned I = 0; I != NumArgs; ++I) 2017 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 2018 2019 // Determine whether this canonical template specialization type already 2020 // exists. 2021 llvm::FoldingSetNodeID ID; 2022 TemplateSpecializationType::Profile(ID, CanonTemplate, 2023 CanonArgs.data(), NumArgs, *this); 2024 2025 void *InsertPos = 0; 2026 TemplateSpecializationType *Spec 2027 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2028 2029 if (!Spec) { 2030 // Allocate a new canonical template specialization type. 2031 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2032 sizeof(TemplateArgument) * NumArgs), 2033 TypeAlignment); 2034 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 2035 CanonArgs.data(), NumArgs, 2036 QualType()); 2037 Types.push_back(Spec); 2038 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 2039 } 2040 2041 assert(Spec->isDependentType() && 2042 "Non-dependent template-id type must have a canonical type"); 2043 return QualType(Spec, 0); 2044} 2045 2046QualType 2047ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 2048 NestedNameSpecifier *NNS, 2049 QualType NamedType) { 2050 llvm::FoldingSetNodeID ID; 2051 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 2052 2053 void *InsertPos = 0; 2054 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2055 if (T) 2056 return QualType(T, 0); 2057 2058 QualType Canon = NamedType; 2059 if (!Canon.isCanonical()) { 2060 Canon = getCanonicalType(NamedType); 2061 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2062 assert(!CheckT && "Elaborated canonical type broken"); 2063 (void)CheckT; 2064 } 2065 2066 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 2067 Types.push_back(T); 2068 ElaboratedTypes.InsertNode(T, InsertPos); 2069 return QualType(T, 0); 2070} 2071 2072QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 2073 NestedNameSpecifier *NNS, 2074 const IdentifierInfo *Name, 2075 QualType Canon) { 2076 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2077 2078 if (Canon.isNull()) { 2079 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2080 ElaboratedTypeKeyword CanonKeyword = Keyword; 2081 if (Keyword == ETK_None) 2082 CanonKeyword = ETK_Typename; 2083 2084 if (CanonNNS != NNS || CanonKeyword != Keyword) 2085 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 2086 } 2087 2088 llvm::FoldingSetNodeID ID; 2089 DependentNameType::Profile(ID, Keyword, NNS, Name); 2090 2091 void *InsertPos = 0; 2092 DependentNameType *T 2093 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2094 if (T) 2095 return QualType(T, 0); 2096 2097 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 2098 Types.push_back(T); 2099 DependentNameTypes.InsertNode(T, InsertPos); 2100 return QualType(T, 0); 2101} 2102 2103QualType 2104ASTContext::getDependentTemplateSpecializationType( 2105 ElaboratedTypeKeyword Keyword, 2106 NestedNameSpecifier *NNS, 2107 const IdentifierInfo *Name, 2108 const TemplateArgumentListInfo &Args) { 2109 // TODO: avoid this copy 2110 llvm::SmallVector<TemplateArgument, 16> ArgCopy; 2111 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2112 ArgCopy.push_back(Args[I].getArgument()); 2113 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2114 ArgCopy.size(), 2115 ArgCopy.data()); 2116} 2117 2118QualType 2119ASTContext::getDependentTemplateSpecializationType( 2120 ElaboratedTypeKeyword Keyword, 2121 NestedNameSpecifier *NNS, 2122 const IdentifierInfo *Name, 2123 unsigned NumArgs, 2124 const TemplateArgument *Args) { 2125 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2126 2127 llvm::FoldingSetNodeID ID; 2128 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2129 Name, NumArgs, Args); 2130 2131 void *InsertPos = 0; 2132 DependentTemplateSpecializationType *T 2133 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2134 if (T) 2135 return QualType(T, 0); 2136 2137 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2138 2139 ElaboratedTypeKeyword CanonKeyword = Keyword; 2140 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2141 2142 bool AnyNonCanonArgs = false; 2143 llvm::SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2144 for (unsigned I = 0; I != NumArgs; ++I) { 2145 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2146 if (!CanonArgs[I].structurallyEquals(Args[I])) 2147 AnyNonCanonArgs = true; 2148 } 2149 2150 QualType Canon; 2151 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2152 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2153 Name, NumArgs, 2154 CanonArgs.data()); 2155 2156 // Find the insert position again. 2157 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2158 } 2159 2160 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2161 sizeof(TemplateArgument) * NumArgs), 2162 TypeAlignment); 2163 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2164 Name, NumArgs, Args, Canon); 2165 Types.push_back(T); 2166 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2167 return QualType(T, 0); 2168} 2169 2170/// CmpProtocolNames - Comparison predicate for sorting protocols 2171/// alphabetically. 2172static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2173 const ObjCProtocolDecl *RHS) { 2174 return LHS->getDeclName() < RHS->getDeclName(); 2175} 2176 2177static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2178 unsigned NumProtocols) { 2179 if (NumProtocols == 0) return true; 2180 2181 for (unsigned i = 1; i != NumProtocols; ++i) 2182 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2183 return false; 2184 return true; 2185} 2186 2187static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2188 unsigned &NumProtocols) { 2189 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2190 2191 // Sort protocols, keyed by name. 2192 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2193 2194 // Remove duplicates. 2195 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2196 NumProtocols = ProtocolsEnd-Protocols; 2197} 2198 2199QualType ASTContext::getObjCObjectType(QualType BaseType, 2200 ObjCProtocolDecl * const *Protocols, 2201 unsigned NumProtocols) { 2202 // If the base type is an interface and there aren't any protocols 2203 // to add, then the interface type will do just fine. 2204 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2205 return BaseType; 2206 2207 // Look in the folding set for an existing type. 2208 llvm::FoldingSetNodeID ID; 2209 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2210 void *InsertPos = 0; 2211 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2212 return QualType(QT, 0); 2213 2214 // Build the canonical type, which has the canonical base type and 2215 // a sorted-and-uniqued list of protocols. 2216 QualType Canonical; 2217 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2218 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2219 if (!ProtocolsSorted) { 2220 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2221 Protocols + NumProtocols); 2222 unsigned UniqueCount = NumProtocols; 2223 2224 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2225 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2226 &Sorted[0], UniqueCount); 2227 } else { 2228 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2229 Protocols, NumProtocols); 2230 } 2231 2232 // Regenerate InsertPos. 2233 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2234 } 2235 2236 unsigned Size = sizeof(ObjCObjectTypeImpl); 2237 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2238 void *Mem = Allocate(Size, TypeAlignment); 2239 ObjCObjectTypeImpl *T = 2240 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2241 2242 Types.push_back(T); 2243 ObjCObjectTypes.InsertNode(T, InsertPos); 2244 return QualType(T, 0); 2245} 2246 2247/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2248/// the given object type. 2249QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) { 2250 llvm::FoldingSetNodeID ID; 2251 ObjCObjectPointerType::Profile(ID, ObjectT); 2252 2253 void *InsertPos = 0; 2254 if (ObjCObjectPointerType *QT = 2255 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2256 return QualType(QT, 0); 2257 2258 // Find the canonical object type. 2259 QualType Canonical; 2260 if (!ObjectT.isCanonical()) { 2261 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2262 2263 // Regenerate InsertPos. 2264 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2265 } 2266 2267 // No match. 2268 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2269 ObjCObjectPointerType *QType = 2270 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2271 2272 Types.push_back(QType); 2273 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2274 return QualType(QType, 0); 2275} 2276 2277/// getObjCInterfaceType - Return the unique reference to the type for the 2278/// specified ObjC interface decl. The list of protocols is optional. 2279QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) { 2280 if (Decl->TypeForDecl) 2281 return QualType(Decl->TypeForDecl, 0); 2282 2283 // FIXME: redeclarations? 2284 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2285 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2286 Decl->TypeForDecl = T; 2287 Types.push_back(T); 2288 return QualType(T, 0); 2289} 2290 2291/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2292/// TypeOfExprType AST's (since expression's are never shared). For example, 2293/// multiple declarations that refer to "typeof(x)" all contain different 2294/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2295/// on canonical type's (which are always unique). 2296QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2297 TypeOfExprType *toe; 2298 if (tofExpr->isTypeDependent()) { 2299 llvm::FoldingSetNodeID ID; 2300 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2301 2302 void *InsertPos = 0; 2303 DependentTypeOfExprType *Canon 2304 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2305 if (Canon) { 2306 // We already have a "canonical" version of an identical, dependent 2307 // typeof(expr) type. Use that as our canonical type. 2308 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2309 QualType((TypeOfExprType*)Canon, 0)); 2310 } 2311 else { 2312 // Build a new, canonical typeof(expr) type. 2313 Canon 2314 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2315 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2316 toe = Canon; 2317 } 2318 } else { 2319 QualType Canonical = getCanonicalType(tofExpr->getType()); 2320 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2321 } 2322 Types.push_back(toe); 2323 return QualType(toe, 0); 2324} 2325 2326/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2327/// TypeOfType AST's. The only motivation to unique these nodes would be 2328/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2329/// an issue. This doesn't effect the type checker, since it operates 2330/// on canonical type's (which are always unique). 2331QualType ASTContext::getTypeOfType(QualType tofType) { 2332 QualType Canonical = getCanonicalType(tofType); 2333 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2334 Types.push_back(tot); 2335 return QualType(tot, 0); 2336} 2337 2338/// getDecltypeForExpr - Given an expr, will return the decltype for that 2339/// expression, according to the rules in C++0x [dcl.type.simple]p4 2340static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2341 if (e->isTypeDependent()) 2342 return Context.DependentTy; 2343 2344 // If e is an id expression or a class member access, decltype(e) is defined 2345 // as the type of the entity named by e. 2346 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2347 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2348 return VD->getType(); 2349 } 2350 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2351 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2352 return FD->getType(); 2353 } 2354 // If e is a function call or an invocation of an overloaded operator, 2355 // (parentheses around e are ignored), decltype(e) is defined as the 2356 // return type of that function. 2357 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2358 return CE->getCallReturnType(); 2359 2360 QualType T = e->getType(); 2361 2362 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2363 // defined as T&, otherwise decltype(e) is defined as T. 2364 if (e->isLvalue(Context) == Expr::LV_Valid) 2365 T = Context.getLValueReferenceType(T); 2366 2367 return T; 2368} 2369 2370/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2371/// DecltypeType AST's. The only motivation to unique these nodes would be 2372/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2373/// an issue. This doesn't effect the type checker, since it operates 2374/// on canonical type's (which are always unique). 2375QualType ASTContext::getDecltypeType(Expr *e) { 2376 DecltypeType *dt; 2377 if (e->isTypeDependent()) { 2378 llvm::FoldingSetNodeID ID; 2379 DependentDecltypeType::Profile(ID, *this, e); 2380 2381 void *InsertPos = 0; 2382 DependentDecltypeType *Canon 2383 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2384 if (Canon) { 2385 // We already have a "canonical" version of an equivalent, dependent 2386 // decltype type. Use that as our canonical type. 2387 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2388 QualType((DecltypeType*)Canon, 0)); 2389 } 2390 else { 2391 // Build a new, canonical typeof(expr) type. 2392 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2393 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2394 dt = Canon; 2395 } 2396 } else { 2397 QualType T = getDecltypeForExpr(e, *this); 2398 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2399 } 2400 Types.push_back(dt); 2401 return QualType(dt, 0); 2402} 2403 2404/// getTagDeclType - Return the unique reference to the type for the 2405/// specified TagDecl (struct/union/class/enum) decl. 2406QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2407 assert (Decl); 2408 // FIXME: What is the design on getTagDeclType when it requires casting 2409 // away const? mutable? 2410 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2411} 2412 2413/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2414/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2415/// needs to agree with the definition in <stddef.h>. 2416CanQualType ASTContext::getSizeType() const { 2417 return getFromTargetType(Target.getSizeType()); 2418} 2419 2420/// getSignedWCharType - Return the type of "signed wchar_t". 2421/// Used when in C++, as a GCC extension. 2422QualType ASTContext::getSignedWCharType() const { 2423 // FIXME: derive from "Target" ? 2424 return WCharTy; 2425} 2426 2427/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2428/// Used when in C++, as a GCC extension. 2429QualType ASTContext::getUnsignedWCharType() const { 2430 // FIXME: derive from "Target" ? 2431 return UnsignedIntTy; 2432} 2433 2434/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2435/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2436QualType ASTContext::getPointerDiffType() const { 2437 return getFromTargetType(Target.getPtrDiffType(0)); 2438} 2439 2440//===----------------------------------------------------------------------===// 2441// Type Operators 2442//===----------------------------------------------------------------------===// 2443 2444CanQualType ASTContext::getCanonicalParamType(QualType T) { 2445 // Push qualifiers into arrays, and then discard any remaining 2446 // qualifiers. 2447 T = getCanonicalType(T); 2448 T = getVariableArrayDecayedType(T); 2449 const Type *Ty = T.getTypePtr(); 2450 QualType Result; 2451 if (isa<ArrayType>(Ty)) { 2452 Result = getArrayDecayedType(QualType(Ty,0)); 2453 } else if (isa<FunctionType>(Ty)) { 2454 Result = getPointerType(QualType(Ty, 0)); 2455 } else { 2456 Result = QualType(Ty, 0); 2457 } 2458 2459 return CanQualType::CreateUnsafe(Result); 2460} 2461 2462/// getCanonicalType - Return the canonical (structural) type corresponding to 2463/// the specified potentially non-canonical type. The non-canonical version 2464/// of a type may have many "decorated" versions of types. Decorators can 2465/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2466/// to be free of any of these, allowing two canonical types to be compared 2467/// for exact equality with a simple pointer comparison. 2468CanQualType ASTContext::getCanonicalType(QualType T) { 2469 QualifierCollector Quals; 2470 const Type *Ptr = Quals.strip(T); 2471 QualType CanType = Ptr->getCanonicalTypeInternal(); 2472 2473 // The canonical internal type will be the canonical type *except* 2474 // that we push type qualifiers down through array types. 2475 2476 // If there are no new qualifiers to push down, stop here. 2477 if (!Quals.hasQualifiers()) 2478 return CanQualType::CreateUnsafe(CanType); 2479 2480 // If the type qualifiers are on an array type, get the canonical 2481 // type of the array with the qualifiers applied to the element 2482 // type. 2483 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2484 if (!AT) 2485 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2486 2487 // Get the canonical version of the element with the extra qualifiers on it. 2488 // This can recursively sink qualifiers through multiple levels of arrays. 2489 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2490 NewEltTy = getCanonicalType(NewEltTy); 2491 2492 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2493 return CanQualType::CreateUnsafe( 2494 getConstantArrayType(NewEltTy, CAT->getSize(), 2495 CAT->getSizeModifier(), 2496 CAT->getIndexTypeCVRQualifiers())); 2497 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2498 return CanQualType::CreateUnsafe( 2499 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2500 IAT->getIndexTypeCVRQualifiers())); 2501 2502 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2503 return CanQualType::CreateUnsafe( 2504 getDependentSizedArrayType(NewEltTy, 2505 DSAT->getSizeExpr() ? 2506 DSAT->getSizeExpr()->Retain() : 0, 2507 DSAT->getSizeModifier(), 2508 DSAT->getIndexTypeCVRQualifiers(), 2509 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2510 2511 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2512 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2513 VAT->getSizeExpr() ? 2514 VAT->getSizeExpr()->Retain() : 0, 2515 VAT->getSizeModifier(), 2516 VAT->getIndexTypeCVRQualifiers(), 2517 VAT->getBracketsRange())); 2518} 2519 2520QualType ASTContext::getUnqualifiedArrayType(QualType T, 2521 Qualifiers &Quals) { 2522 Quals = T.getQualifiers(); 2523 const ArrayType *AT = getAsArrayType(T); 2524 if (!AT) { 2525 return T.getUnqualifiedType(); 2526 } 2527 2528 QualType Elt = AT->getElementType(); 2529 QualType UnqualElt = getUnqualifiedArrayType(Elt, Quals); 2530 if (Elt == UnqualElt) 2531 return T; 2532 2533 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 2534 return getConstantArrayType(UnqualElt, CAT->getSize(), 2535 CAT->getSizeModifier(), 0); 2536 } 2537 2538 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 2539 return getIncompleteArrayType(UnqualElt, IAT->getSizeModifier(), 0); 2540 } 2541 2542 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 2543 return getVariableArrayType(UnqualElt, 2544 VAT->getSizeExpr() ? 2545 VAT->getSizeExpr()->Retain() : 0, 2546 VAT->getSizeModifier(), 2547 VAT->getIndexTypeCVRQualifiers(), 2548 VAT->getBracketsRange()); 2549 } 2550 2551 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 2552 return getDependentSizedArrayType(UnqualElt, DSAT->getSizeExpr()->Retain(), 2553 DSAT->getSizeModifier(), 0, 2554 SourceRange()); 2555} 2556 2557/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 2558/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 2559/// they point to and return true. If T1 and T2 aren't pointer types 2560/// or pointer-to-member types, or if they are not similar at this 2561/// level, returns false and leaves T1 and T2 unchanged. Top-level 2562/// qualifiers on T1 and T2 are ignored. This function will typically 2563/// be called in a loop that successively "unwraps" pointer and 2564/// pointer-to-member types to compare them at each level. 2565bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 2566 const PointerType *T1PtrType = T1->getAs<PointerType>(), 2567 *T2PtrType = T2->getAs<PointerType>(); 2568 if (T1PtrType && T2PtrType) { 2569 T1 = T1PtrType->getPointeeType(); 2570 T2 = T2PtrType->getPointeeType(); 2571 return true; 2572 } 2573 2574 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 2575 *T2MPType = T2->getAs<MemberPointerType>(); 2576 if (T1MPType && T2MPType && 2577 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 2578 QualType(T2MPType->getClass(), 0))) { 2579 T1 = T1MPType->getPointeeType(); 2580 T2 = T2MPType->getPointeeType(); 2581 return true; 2582 } 2583 2584 if (getLangOptions().ObjC1) { 2585 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 2586 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 2587 if (T1OPType && T2OPType) { 2588 T1 = T1OPType->getPointeeType(); 2589 T2 = T2OPType->getPointeeType(); 2590 return true; 2591 } 2592 } 2593 2594 // FIXME: Block pointers, too? 2595 2596 return false; 2597} 2598 2599DeclarationNameInfo ASTContext::getNameForTemplate(TemplateName Name, 2600 SourceLocation NameLoc) { 2601 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2602 // DNInfo work in progress: CHECKME: what about DNLoc? 2603 return DeclarationNameInfo(TD->getDeclName(), NameLoc); 2604 2605 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2606 DeclarationName DName; 2607 if (DTN->isIdentifier()) { 2608 DName = DeclarationNames.getIdentifier(DTN->getIdentifier()); 2609 return DeclarationNameInfo(DName, NameLoc); 2610 } else { 2611 DName = DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2612 // DNInfo work in progress: FIXME: source locations? 2613 DeclarationNameLoc DNLoc; 2614 DNLoc.CXXOperatorName.BeginOpNameLoc = SourceLocation().getRawEncoding(); 2615 DNLoc.CXXOperatorName.EndOpNameLoc = SourceLocation().getRawEncoding(); 2616 return DeclarationNameInfo(DName, NameLoc, DNLoc); 2617 } 2618 } 2619 2620 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2621 assert(Storage); 2622 // DNInfo work in progress: CHECKME: what about DNLoc? 2623 return DeclarationNameInfo((*Storage->begin())->getDeclName(), NameLoc); 2624} 2625 2626TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2627 if (TemplateDecl *Template = Name.getAsTemplateDecl()) { 2628 if (TemplateTemplateParmDecl *TTP 2629 = dyn_cast<TemplateTemplateParmDecl>(Template)) 2630 Template = getCanonicalTemplateTemplateParmDecl(TTP); 2631 2632 // The canonical template name is the canonical template declaration. 2633 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2634 } 2635 2636 assert(!Name.getAsOverloadedTemplate()); 2637 2638 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2639 assert(DTN && "Non-dependent template names must refer to template decls."); 2640 return DTN->CanonicalTemplateName; 2641} 2642 2643bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2644 X = getCanonicalTemplateName(X); 2645 Y = getCanonicalTemplateName(Y); 2646 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2647} 2648 2649TemplateArgument 2650ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2651 switch (Arg.getKind()) { 2652 case TemplateArgument::Null: 2653 return Arg; 2654 2655 case TemplateArgument::Expression: 2656 return Arg; 2657 2658 case TemplateArgument::Declaration: 2659 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2660 2661 case TemplateArgument::Template: 2662 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2663 2664 case TemplateArgument::Integral: 2665 return TemplateArgument(*Arg.getAsIntegral(), 2666 getCanonicalType(Arg.getIntegralType())); 2667 2668 case TemplateArgument::Type: 2669 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2670 2671 case TemplateArgument::Pack: { 2672 // FIXME: Allocate in ASTContext 2673 TemplateArgument *CanonArgs = new TemplateArgument[Arg.pack_size()]; 2674 unsigned Idx = 0; 2675 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2676 AEnd = Arg.pack_end(); 2677 A != AEnd; (void)++A, ++Idx) 2678 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2679 2680 TemplateArgument Result; 2681 Result.setArgumentPack(CanonArgs, Arg.pack_size(), false); 2682 return Result; 2683 } 2684 } 2685 2686 // Silence GCC warning 2687 assert(false && "Unhandled template argument kind"); 2688 return TemplateArgument(); 2689} 2690 2691NestedNameSpecifier * 2692ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2693 if (!NNS) 2694 return 0; 2695 2696 switch (NNS->getKind()) { 2697 case NestedNameSpecifier::Identifier: 2698 // Canonicalize the prefix but keep the identifier the same. 2699 return NestedNameSpecifier::Create(*this, 2700 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2701 NNS->getAsIdentifier()); 2702 2703 case NestedNameSpecifier::Namespace: 2704 // A namespace is canonical; build a nested-name-specifier with 2705 // this namespace and no prefix. 2706 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2707 2708 case NestedNameSpecifier::TypeSpec: 2709 case NestedNameSpecifier::TypeSpecWithTemplate: { 2710 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2711 return NestedNameSpecifier::Create(*this, 0, 2712 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2713 T.getTypePtr()); 2714 } 2715 2716 case NestedNameSpecifier::Global: 2717 // The global specifier is canonical and unique. 2718 return NNS; 2719 } 2720 2721 // Required to silence a GCC warning 2722 return 0; 2723} 2724 2725 2726const ArrayType *ASTContext::getAsArrayType(QualType T) { 2727 // Handle the non-qualified case efficiently. 2728 if (!T.hasLocalQualifiers()) { 2729 // Handle the common positive case fast. 2730 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2731 return AT; 2732 } 2733 2734 // Handle the common negative case fast. 2735 QualType CType = T->getCanonicalTypeInternal(); 2736 if (!isa<ArrayType>(CType)) 2737 return 0; 2738 2739 // Apply any qualifiers from the array type to the element type. This 2740 // implements C99 6.7.3p8: "If the specification of an array type includes 2741 // any type qualifiers, the element type is so qualified, not the array type." 2742 2743 // If we get here, we either have type qualifiers on the type, or we have 2744 // sugar such as a typedef in the way. If we have type qualifiers on the type 2745 // we must propagate them down into the element type. 2746 2747 QualifierCollector Qs; 2748 const Type *Ty = Qs.strip(T.getDesugaredType()); 2749 2750 // If we have a simple case, just return now. 2751 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2752 if (ATy == 0 || Qs.empty()) 2753 return ATy; 2754 2755 // Otherwise, we have an array and we have qualifiers on it. Push the 2756 // qualifiers into the array element type and return a new array type. 2757 // Get the canonical version of the element with the extra qualifiers on it. 2758 // This can recursively sink qualifiers through multiple levels of arrays. 2759 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2760 2761 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2762 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2763 CAT->getSizeModifier(), 2764 CAT->getIndexTypeCVRQualifiers())); 2765 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2766 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2767 IAT->getSizeModifier(), 2768 IAT->getIndexTypeCVRQualifiers())); 2769 2770 if (const DependentSizedArrayType *DSAT 2771 = dyn_cast<DependentSizedArrayType>(ATy)) 2772 return cast<ArrayType>( 2773 getDependentSizedArrayType(NewEltTy, 2774 DSAT->getSizeExpr() ? 2775 DSAT->getSizeExpr()->Retain() : 0, 2776 DSAT->getSizeModifier(), 2777 DSAT->getIndexTypeCVRQualifiers(), 2778 DSAT->getBracketsRange())); 2779 2780 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2781 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2782 VAT->getSizeExpr() ? 2783 VAT->getSizeExpr()->Retain() : 0, 2784 VAT->getSizeModifier(), 2785 VAT->getIndexTypeCVRQualifiers(), 2786 VAT->getBracketsRange())); 2787} 2788 2789/// getArrayDecayedType - Return the properly qualified result of decaying the 2790/// specified array type to a pointer. This operation is non-trivial when 2791/// handling typedefs etc. The canonical type of "T" must be an array type, 2792/// this returns a pointer to a properly qualified element of the array. 2793/// 2794/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2795QualType ASTContext::getArrayDecayedType(QualType Ty) { 2796 // Get the element type with 'getAsArrayType' so that we don't lose any 2797 // typedefs in the element type of the array. This also handles propagation 2798 // of type qualifiers from the array type into the element type if present 2799 // (C99 6.7.3p8). 2800 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2801 assert(PrettyArrayType && "Not an array type!"); 2802 2803 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2804 2805 // int x[restrict 4] -> int *restrict 2806 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2807} 2808 2809QualType ASTContext::getBaseElementType(QualType QT) { 2810 QualifierCollector Qs; 2811 while (const ArrayType *AT = getAsArrayType(QualType(Qs.strip(QT), 0))) 2812 QT = AT->getElementType(); 2813 return Qs.apply(QT); 2814} 2815 2816QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2817 QualType ElemTy = AT->getElementType(); 2818 2819 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2820 return getBaseElementType(AT); 2821 2822 return ElemTy; 2823} 2824 2825/// getConstantArrayElementCount - Returns number of constant array elements. 2826uint64_t 2827ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2828 uint64_t ElementCount = 1; 2829 do { 2830 ElementCount *= CA->getSize().getZExtValue(); 2831 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2832 } while (CA); 2833 return ElementCount; 2834} 2835 2836/// getFloatingRank - Return a relative rank for floating point types. 2837/// This routine will assert if passed a built-in type that isn't a float. 2838static FloatingRank getFloatingRank(QualType T) { 2839 if (const ComplexType *CT = T->getAs<ComplexType>()) 2840 return getFloatingRank(CT->getElementType()); 2841 2842 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2843 switch (T->getAs<BuiltinType>()->getKind()) { 2844 default: assert(0 && "getFloatingRank(): not a floating type"); 2845 case BuiltinType::Float: return FloatRank; 2846 case BuiltinType::Double: return DoubleRank; 2847 case BuiltinType::LongDouble: return LongDoubleRank; 2848 } 2849} 2850 2851/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2852/// point or a complex type (based on typeDomain/typeSize). 2853/// 'typeDomain' is a real floating point or complex type. 2854/// 'typeSize' is a real floating point or complex type. 2855QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2856 QualType Domain) const { 2857 FloatingRank EltRank = getFloatingRank(Size); 2858 if (Domain->isComplexType()) { 2859 switch (EltRank) { 2860 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2861 case FloatRank: return FloatComplexTy; 2862 case DoubleRank: return DoubleComplexTy; 2863 case LongDoubleRank: return LongDoubleComplexTy; 2864 } 2865 } 2866 2867 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2868 switch (EltRank) { 2869 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2870 case FloatRank: return FloatTy; 2871 case DoubleRank: return DoubleTy; 2872 case LongDoubleRank: return LongDoubleTy; 2873 } 2874} 2875 2876/// getFloatingTypeOrder - Compare the rank of the two specified floating 2877/// point types, ignoring the domain of the type (i.e. 'double' == 2878/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2879/// LHS < RHS, return -1. 2880int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2881 FloatingRank LHSR = getFloatingRank(LHS); 2882 FloatingRank RHSR = getFloatingRank(RHS); 2883 2884 if (LHSR == RHSR) 2885 return 0; 2886 if (LHSR > RHSR) 2887 return 1; 2888 return -1; 2889} 2890 2891/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2892/// routine will assert if passed a built-in type that isn't an integer or enum, 2893/// or if it is not canonicalized. 2894unsigned ASTContext::getIntegerRank(Type *T) { 2895 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2896 if (EnumType* ET = dyn_cast<EnumType>(T)) 2897 T = ET->getDecl()->getPromotionType().getTypePtr(); 2898 2899 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2900 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2901 2902 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2903 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2904 2905 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2906 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2907 2908 switch (cast<BuiltinType>(T)->getKind()) { 2909 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2910 case BuiltinType::Bool: 2911 return 1 + (getIntWidth(BoolTy) << 3); 2912 case BuiltinType::Char_S: 2913 case BuiltinType::Char_U: 2914 case BuiltinType::SChar: 2915 case BuiltinType::UChar: 2916 return 2 + (getIntWidth(CharTy) << 3); 2917 case BuiltinType::Short: 2918 case BuiltinType::UShort: 2919 return 3 + (getIntWidth(ShortTy) << 3); 2920 case BuiltinType::Int: 2921 case BuiltinType::UInt: 2922 return 4 + (getIntWidth(IntTy) << 3); 2923 case BuiltinType::Long: 2924 case BuiltinType::ULong: 2925 return 5 + (getIntWidth(LongTy) << 3); 2926 case BuiltinType::LongLong: 2927 case BuiltinType::ULongLong: 2928 return 6 + (getIntWidth(LongLongTy) << 3); 2929 case BuiltinType::Int128: 2930 case BuiltinType::UInt128: 2931 return 7 + (getIntWidth(Int128Ty) << 3); 2932 } 2933} 2934 2935/// \brief Whether this is a promotable bitfield reference according 2936/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 2937/// 2938/// \returns the type this bit-field will promote to, or NULL if no 2939/// promotion occurs. 2940QualType ASTContext::isPromotableBitField(Expr *E) { 2941 if (E->isTypeDependent() || E->isValueDependent()) 2942 return QualType(); 2943 2944 FieldDecl *Field = E->getBitField(); 2945 if (!Field) 2946 return QualType(); 2947 2948 QualType FT = Field->getType(); 2949 2950 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 2951 uint64_t BitWidth = BitWidthAP.getZExtValue(); 2952 uint64_t IntSize = getTypeSize(IntTy); 2953 // GCC extension compatibility: if the bit-field size is less than or equal 2954 // to the size of int, it gets promoted no matter what its type is. 2955 // For instance, unsigned long bf : 4 gets promoted to signed int. 2956 if (BitWidth < IntSize) 2957 return IntTy; 2958 2959 if (BitWidth == IntSize) 2960 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 2961 2962 // Types bigger than int are not subject to promotions, and therefore act 2963 // like the base type. 2964 // FIXME: This doesn't quite match what gcc does, but what gcc does here 2965 // is ridiculous. 2966 return QualType(); 2967} 2968 2969/// getPromotedIntegerType - Returns the type that Promotable will 2970/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 2971/// integer type. 2972QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 2973 assert(!Promotable.isNull()); 2974 assert(Promotable->isPromotableIntegerType()); 2975 if (const EnumType *ET = Promotable->getAs<EnumType>()) 2976 return ET->getDecl()->getPromotionType(); 2977 if (Promotable->isSignedIntegerType()) 2978 return IntTy; 2979 uint64_t PromotableSize = getTypeSize(Promotable); 2980 uint64_t IntSize = getTypeSize(IntTy); 2981 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 2982 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 2983} 2984 2985/// getIntegerTypeOrder - Returns the highest ranked integer type: 2986/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2987/// LHS < RHS, return -1. 2988int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2989 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2990 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2991 if (LHSC == RHSC) return 0; 2992 2993 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2994 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2995 2996 unsigned LHSRank = getIntegerRank(LHSC); 2997 unsigned RHSRank = getIntegerRank(RHSC); 2998 2999 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 3000 if (LHSRank == RHSRank) return 0; 3001 return LHSRank > RHSRank ? 1 : -1; 3002 } 3003 3004 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 3005 if (LHSUnsigned) { 3006 // If the unsigned [LHS] type is larger, return it. 3007 if (LHSRank >= RHSRank) 3008 return 1; 3009 3010 // If the signed type can represent all values of the unsigned type, it 3011 // wins. Because we are dealing with 2's complement and types that are 3012 // powers of two larger than each other, this is always safe. 3013 return -1; 3014 } 3015 3016 // If the unsigned [RHS] type is larger, return it. 3017 if (RHSRank >= LHSRank) 3018 return -1; 3019 3020 // If the signed type can represent all values of the unsigned type, it 3021 // wins. Because we are dealing with 2's complement and types that are 3022 // powers of two larger than each other, this is always safe. 3023 return 1; 3024} 3025 3026static RecordDecl * 3027CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 3028 SourceLocation L, IdentifierInfo *Id) { 3029 if (Ctx.getLangOptions().CPlusPlus) 3030 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 3031 else 3032 return RecordDecl::Create(Ctx, TK, DC, L, Id); 3033} 3034 3035// getCFConstantStringType - Return the type used for constant CFStrings. 3036QualType ASTContext::getCFConstantStringType() { 3037 if (!CFConstantStringTypeDecl) { 3038 CFConstantStringTypeDecl = 3039 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3040 &Idents.get("NSConstantString")); 3041 CFConstantStringTypeDecl->startDefinition(); 3042 3043 QualType FieldTypes[4]; 3044 3045 // const int *isa; 3046 FieldTypes[0] = getPointerType(IntTy.withConst()); 3047 // int flags; 3048 FieldTypes[1] = IntTy; 3049 // const char *str; 3050 FieldTypes[2] = getPointerType(CharTy.withConst()); 3051 // long length; 3052 FieldTypes[3] = LongTy; 3053 3054 // Create fields 3055 for (unsigned i = 0; i < 4; ++i) { 3056 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 3057 SourceLocation(), 0, 3058 FieldTypes[i], /*TInfo=*/0, 3059 /*BitWidth=*/0, 3060 /*Mutable=*/false); 3061 Field->setAccess(AS_public); 3062 CFConstantStringTypeDecl->addDecl(Field); 3063 } 3064 3065 CFConstantStringTypeDecl->completeDefinition(); 3066 } 3067 3068 return getTagDeclType(CFConstantStringTypeDecl); 3069} 3070 3071void ASTContext::setCFConstantStringType(QualType T) { 3072 const RecordType *Rec = T->getAs<RecordType>(); 3073 assert(Rec && "Invalid CFConstantStringType"); 3074 CFConstantStringTypeDecl = Rec->getDecl(); 3075} 3076 3077// getNSConstantStringType - Return the type used for constant NSStrings. 3078QualType ASTContext::getNSConstantStringType() { 3079 if (!NSConstantStringTypeDecl) { 3080 NSConstantStringTypeDecl = 3081 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3082 &Idents.get("__builtin_NSString")); 3083 NSConstantStringTypeDecl->startDefinition(); 3084 3085 QualType FieldTypes[3]; 3086 3087 // const int *isa; 3088 FieldTypes[0] = getPointerType(IntTy.withConst()); 3089 // const char *str; 3090 FieldTypes[1] = getPointerType(CharTy.withConst()); 3091 // unsigned int length; 3092 FieldTypes[2] = UnsignedIntTy; 3093 3094 // Create fields 3095 for (unsigned i = 0; i < 3; ++i) { 3096 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 3097 SourceLocation(), 0, 3098 FieldTypes[i], /*TInfo=*/0, 3099 /*BitWidth=*/0, 3100 /*Mutable=*/false); 3101 Field->setAccess(AS_public); 3102 NSConstantStringTypeDecl->addDecl(Field); 3103 } 3104 3105 NSConstantStringTypeDecl->completeDefinition(); 3106 } 3107 3108 return getTagDeclType(NSConstantStringTypeDecl); 3109} 3110 3111void ASTContext::setNSConstantStringType(QualType T) { 3112 const RecordType *Rec = T->getAs<RecordType>(); 3113 assert(Rec && "Invalid NSConstantStringType"); 3114 NSConstantStringTypeDecl = Rec->getDecl(); 3115} 3116 3117QualType ASTContext::getObjCFastEnumerationStateType() { 3118 if (!ObjCFastEnumerationStateTypeDecl) { 3119 ObjCFastEnumerationStateTypeDecl = 3120 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3121 &Idents.get("__objcFastEnumerationState")); 3122 ObjCFastEnumerationStateTypeDecl->startDefinition(); 3123 3124 QualType FieldTypes[] = { 3125 UnsignedLongTy, 3126 getPointerType(ObjCIdTypedefType), 3127 getPointerType(UnsignedLongTy), 3128 getConstantArrayType(UnsignedLongTy, 3129 llvm::APInt(32, 5), ArrayType::Normal, 0) 3130 }; 3131 3132 for (size_t i = 0; i < 4; ++i) { 3133 FieldDecl *Field = FieldDecl::Create(*this, 3134 ObjCFastEnumerationStateTypeDecl, 3135 SourceLocation(), 0, 3136 FieldTypes[i], /*TInfo=*/0, 3137 /*BitWidth=*/0, 3138 /*Mutable=*/false); 3139 Field->setAccess(AS_public); 3140 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 3141 } 3142 3143 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 3144 } 3145 3146 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 3147} 3148 3149QualType ASTContext::getBlockDescriptorType() { 3150 if (BlockDescriptorType) 3151 return getTagDeclType(BlockDescriptorType); 3152 3153 RecordDecl *T; 3154 // FIXME: Needs the FlagAppleBlock bit. 3155 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3156 &Idents.get("__block_descriptor")); 3157 T->startDefinition(); 3158 3159 QualType FieldTypes[] = { 3160 UnsignedLongTy, 3161 UnsignedLongTy, 3162 }; 3163 3164 const char *FieldNames[] = { 3165 "reserved", 3166 "Size" 3167 }; 3168 3169 for (size_t i = 0; i < 2; ++i) { 3170 FieldDecl *Field = FieldDecl::Create(*this, 3171 T, 3172 SourceLocation(), 3173 &Idents.get(FieldNames[i]), 3174 FieldTypes[i], /*TInfo=*/0, 3175 /*BitWidth=*/0, 3176 /*Mutable=*/false); 3177 Field->setAccess(AS_public); 3178 T->addDecl(Field); 3179 } 3180 3181 T->completeDefinition(); 3182 3183 BlockDescriptorType = T; 3184 3185 return getTagDeclType(BlockDescriptorType); 3186} 3187 3188void ASTContext::setBlockDescriptorType(QualType T) { 3189 const RecordType *Rec = T->getAs<RecordType>(); 3190 assert(Rec && "Invalid BlockDescriptorType"); 3191 BlockDescriptorType = Rec->getDecl(); 3192} 3193 3194QualType ASTContext::getBlockDescriptorExtendedType() { 3195 if (BlockDescriptorExtendedType) 3196 return getTagDeclType(BlockDescriptorExtendedType); 3197 3198 RecordDecl *T; 3199 // FIXME: Needs the FlagAppleBlock bit. 3200 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3201 &Idents.get("__block_descriptor_withcopydispose")); 3202 T->startDefinition(); 3203 3204 QualType FieldTypes[] = { 3205 UnsignedLongTy, 3206 UnsignedLongTy, 3207 getPointerType(VoidPtrTy), 3208 getPointerType(VoidPtrTy) 3209 }; 3210 3211 const char *FieldNames[] = { 3212 "reserved", 3213 "Size", 3214 "CopyFuncPtr", 3215 "DestroyFuncPtr" 3216 }; 3217 3218 for (size_t i = 0; i < 4; ++i) { 3219 FieldDecl *Field = FieldDecl::Create(*this, 3220 T, 3221 SourceLocation(), 3222 &Idents.get(FieldNames[i]), 3223 FieldTypes[i], /*TInfo=*/0, 3224 /*BitWidth=*/0, 3225 /*Mutable=*/false); 3226 Field->setAccess(AS_public); 3227 T->addDecl(Field); 3228 } 3229 3230 T->completeDefinition(); 3231 3232 BlockDescriptorExtendedType = T; 3233 3234 return getTagDeclType(BlockDescriptorExtendedType); 3235} 3236 3237void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3238 const RecordType *Rec = T->getAs<RecordType>(); 3239 assert(Rec && "Invalid BlockDescriptorType"); 3240 BlockDescriptorExtendedType = Rec->getDecl(); 3241} 3242 3243bool ASTContext::BlockRequiresCopying(QualType Ty) { 3244 if (Ty->isBlockPointerType()) 3245 return true; 3246 if (isObjCNSObjectType(Ty)) 3247 return true; 3248 if (Ty->isObjCObjectPointerType()) 3249 return true; 3250 return false; 3251} 3252 3253QualType ASTContext::BuildByRefType(llvm::StringRef DeclName, QualType Ty) { 3254 // type = struct __Block_byref_1_X { 3255 // void *__isa; 3256 // struct __Block_byref_1_X *__forwarding; 3257 // unsigned int __flags; 3258 // unsigned int __size; 3259 // void *__copy_helper; // as needed 3260 // void *__destroy_help // as needed 3261 // int X; 3262 // } * 3263 3264 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3265 3266 // FIXME: Move up 3267 llvm::SmallString<36> Name; 3268 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3269 ++UniqueBlockByRefTypeID << '_' << DeclName; 3270 RecordDecl *T; 3271 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3272 &Idents.get(Name.str())); 3273 T->startDefinition(); 3274 QualType Int32Ty = IntTy; 3275 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3276 QualType FieldTypes[] = { 3277 getPointerType(VoidPtrTy), 3278 getPointerType(getTagDeclType(T)), 3279 Int32Ty, 3280 Int32Ty, 3281 getPointerType(VoidPtrTy), 3282 getPointerType(VoidPtrTy), 3283 Ty 3284 }; 3285 3286 llvm::StringRef FieldNames[] = { 3287 "__isa", 3288 "__forwarding", 3289 "__flags", 3290 "__size", 3291 "__copy_helper", 3292 "__destroy_helper", 3293 DeclName, 3294 }; 3295 3296 for (size_t i = 0; i < 7; ++i) { 3297 if (!HasCopyAndDispose && i >=4 && i <= 5) 3298 continue; 3299 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3300 &Idents.get(FieldNames[i]), 3301 FieldTypes[i], /*TInfo=*/0, 3302 /*BitWidth=*/0, /*Mutable=*/false); 3303 Field->setAccess(AS_public); 3304 T->addDecl(Field); 3305 } 3306 3307 T->completeDefinition(); 3308 3309 return getPointerType(getTagDeclType(T)); 3310} 3311 3312 3313QualType ASTContext::getBlockParmType( 3314 bool BlockHasCopyDispose, 3315 llvm::SmallVectorImpl<const Expr *> &Layout) { 3316 3317 // FIXME: Move up 3318 llvm::SmallString<36> Name; 3319 llvm::raw_svector_ostream(Name) << "__block_literal_" 3320 << ++UniqueBlockParmTypeID; 3321 RecordDecl *T; 3322 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3323 &Idents.get(Name.str())); 3324 T->startDefinition(); 3325 QualType FieldTypes[] = { 3326 getPointerType(VoidPtrTy), 3327 IntTy, 3328 IntTy, 3329 getPointerType(VoidPtrTy), 3330 (BlockHasCopyDispose ? 3331 getPointerType(getBlockDescriptorExtendedType()) : 3332 getPointerType(getBlockDescriptorType())) 3333 }; 3334 3335 const char *FieldNames[] = { 3336 "__isa", 3337 "__flags", 3338 "__reserved", 3339 "__FuncPtr", 3340 "__descriptor" 3341 }; 3342 3343 for (size_t i = 0; i < 5; ++i) { 3344 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3345 &Idents.get(FieldNames[i]), 3346 FieldTypes[i], /*TInfo=*/0, 3347 /*BitWidth=*/0, /*Mutable=*/false); 3348 Field->setAccess(AS_public); 3349 T->addDecl(Field); 3350 } 3351 3352 for (unsigned i = 0; i < Layout.size(); ++i) { 3353 const Expr *E = Layout[i]; 3354 3355 QualType FieldType = E->getType(); 3356 IdentifierInfo *FieldName = 0; 3357 if (isa<CXXThisExpr>(E)) { 3358 FieldName = &Idents.get("this"); 3359 } else if (const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E)) { 3360 const ValueDecl *D = BDRE->getDecl(); 3361 FieldName = D->getIdentifier(); 3362 if (BDRE->isByRef()) 3363 FieldType = BuildByRefType(D->getName(), FieldType); 3364 } else { 3365 // Padding. 3366 assert(isa<ConstantArrayType>(FieldType) && 3367 isa<DeclRefExpr>(E) && 3368 !cast<DeclRefExpr>(E)->getDecl()->getDeclName() && 3369 "doesn't match characteristics of padding decl"); 3370 } 3371 3372 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3373 FieldName, FieldType, /*TInfo=*/0, 3374 /*BitWidth=*/0, /*Mutable=*/false); 3375 Field->setAccess(AS_public); 3376 T->addDecl(Field); 3377 } 3378 3379 T->completeDefinition(); 3380 3381 return getPointerType(getTagDeclType(T)); 3382} 3383 3384void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3385 const RecordType *Rec = T->getAs<RecordType>(); 3386 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3387 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3388} 3389 3390// This returns true if a type has been typedefed to BOOL: 3391// typedef <type> BOOL; 3392static bool isTypeTypedefedAsBOOL(QualType T) { 3393 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3394 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3395 return II->isStr("BOOL"); 3396 3397 return false; 3398} 3399 3400/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3401/// purpose. 3402CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) { 3403 CharUnits sz = getTypeSizeInChars(type); 3404 3405 // Make all integer and enum types at least as large as an int 3406 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 3407 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3408 // Treat arrays as pointers, since that's how they're passed in. 3409 else if (type->isArrayType()) 3410 sz = getTypeSizeInChars(VoidPtrTy); 3411 return sz; 3412} 3413 3414static inline 3415std::string charUnitsToString(const CharUnits &CU) { 3416 return llvm::itostr(CU.getQuantity()); 3417} 3418 3419/// getObjCEncodingForBlockDecl - Return the encoded type for this block 3420/// declaration. 3421void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3422 std::string& S) { 3423 const BlockDecl *Decl = Expr->getBlockDecl(); 3424 QualType BlockTy = 3425 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3426 // Encode result type. 3427 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3428 // Compute size of all parameters. 3429 // Start with computing size of a pointer in number of bytes. 3430 // FIXME: There might(should) be a better way of doing this computation! 3431 SourceLocation Loc; 3432 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3433 CharUnits ParmOffset = PtrSize; 3434 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3435 E = Decl->param_end(); PI != E; ++PI) { 3436 QualType PType = (*PI)->getType(); 3437 CharUnits sz = getObjCEncodingTypeSize(PType); 3438 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3439 ParmOffset += sz; 3440 } 3441 // Size of the argument frame 3442 S += charUnitsToString(ParmOffset); 3443 // Block pointer and offset. 3444 S += "@?0"; 3445 ParmOffset = PtrSize; 3446 3447 // Argument types. 3448 ParmOffset = PtrSize; 3449 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3450 Decl->param_end(); PI != E; ++PI) { 3451 ParmVarDecl *PVDecl = *PI; 3452 QualType PType = PVDecl->getOriginalType(); 3453 if (const ArrayType *AT = 3454 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3455 // Use array's original type only if it has known number of 3456 // elements. 3457 if (!isa<ConstantArrayType>(AT)) 3458 PType = PVDecl->getType(); 3459 } else if (PType->isFunctionType()) 3460 PType = PVDecl->getType(); 3461 getObjCEncodingForType(PType, S); 3462 S += charUnitsToString(ParmOffset); 3463 ParmOffset += getObjCEncodingTypeSize(PType); 3464 } 3465} 3466 3467/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3468/// declaration. 3469void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3470 std::string& S) { 3471 // FIXME: This is not very efficient. 3472 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3473 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3474 // Encode result type. 3475 getObjCEncodingForType(Decl->getResultType(), S); 3476 // Compute size of all parameters. 3477 // Start with computing size of a pointer in number of bytes. 3478 // FIXME: There might(should) be a better way of doing this computation! 3479 SourceLocation Loc; 3480 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3481 // The first two arguments (self and _cmd) are pointers; account for 3482 // their size. 3483 CharUnits ParmOffset = 2 * PtrSize; 3484 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3485 E = Decl->sel_param_end(); PI != E; ++PI) { 3486 QualType PType = (*PI)->getType(); 3487 CharUnits sz = getObjCEncodingTypeSize(PType); 3488 assert (sz.isPositive() && 3489 "getObjCEncodingForMethodDecl - Incomplete param type"); 3490 ParmOffset += sz; 3491 } 3492 S += charUnitsToString(ParmOffset); 3493 S += "@0:"; 3494 S += charUnitsToString(PtrSize); 3495 3496 // Argument types. 3497 ParmOffset = 2 * PtrSize; 3498 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3499 E = Decl->sel_param_end(); PI != E; ++PI) { 3500 ParmVarDecl *PVDecl = *PI; 3501 QualType PType = PVDecl->getOriginalType(); 3502 if (const ArrayType *AT = 3503 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3504 // Use array's original type only if it has known number of 3505 // elements. 3506 if (!isa<ConstantArrayType>(AT)) 3507 PType = PVDecl->getType(); 3508 } else if (PType->isFunctionType()) 3509 PType = PVDecl->getType(); 3510 // Process argument qualifiers for user supplied arguments; such as, 3511 // 'in', 'inout', etc. 3512 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3513 getObjCEncodingForType(PType, S); 3514 S += charUnitsToString(ParmOffset); 3515 ParmOffset += getObjCEncodingTypeSize(PType); 3516 } 3517} 3518 3519/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3520/// property declaration. If non-NULL, Container must be either an 3521/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3522/// NULL when getting encodings for protocol properties. 3523/// Property attributes are stored as a comma-delimited C string. The simple 3524/// attributes readonly and bycopy are encoded as single characters. The 3525/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3526/// encoded as single characters, followed by an identifier. Property types 3527/// are also encoded as a parametrized attribute. The characters used to encode 3528/// these attributes are defined by the following enumeration: 3529/// @code 3530/// enum PropertyAttributes { 3531/// kPropertyReadOnly = 'R', // property is read-only. 3532/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3533/// kPropertyByref = '&', // property is a reference to the value last assigned 3534/// kPropertyDynamic = 'D', // property is dynamic 3535/// kPropertyGetter = 'G', // followed by getter selector name 3536/// kPropertySetter = 'S', // followed by setter selector name 3537/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3538/// kPropertyType = 't' // followed by old-style type encoding. 3539/// kPropertyWeak = 'W' // 'weak' property 3540/// kPropertyStrong = 'P' // property GC'able 3541/// kPropertyNonAtomic = 'N' // property non-atomic 3542/// }; 3543/// @endcode 3544void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3545 const Decl *Container, 3546 std::string& S) { 3547 // Collect information from the property implementation decl(s). 3548 bool Dynamic = false; 3549 ObjCPropertyImplDecl *SynthesizePID = 0; 3550 3551 // FIXME: Duplicated code due to poor abstraction. 3552 if (Container) { 3553 if (const ObjCCategoryImplDecl *CID = 3554 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3555 for (ObjCCategoryImplDecl::propimpl_iterator 3556 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3557 i != e; ++i) { 3558 ObjCPropertyImplDecl *PID = *i; 3559 if (PID->getPropertyDecl() == PD) { 3560 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3561 Dynamic = true; 3562 } else { 3563 SynthesizePID = PID; 3564 } 3565 } 3566 } 3567 } else { 3568 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3569 for (ObjCCategoryImplDecl::propimpl_iterator 3570 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3571 i != e; ++i) { 3572 ObjCPropertyImplDecl *PID = *i; 3573 if (PID->getPropertyDecl() == PD) { 3574 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3575 Dynamic = true; 3576 } else { 3577 SynthesizePID = PID; 3578 } 3579 } 3580 } 3581 } 3582 } 3583 3584 // FIXME: This is not very efficient. 3585 S = "T"; 3586 3587 // Encode result type. 3588 // GCC has some special rules regarding encoding of properties which 3589 // closely resembles encoding of ivars. 3590 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3591 true /* outermost type */, 3592 true /* encoding for property */); 3593 3594 if (PD->isReadOnly()) { 3595 S += ",R"; 3596 } else { 3597 switch (PD->getSetterKind()) { 3598 case ObjCPropertyDecl::Assign: break; 3599 case ObjCPropertyDecl::Copy: S += ",C"; break; 3600 case ObjCPropertyDecl::Retain: S += ",&"; break; 3601 } 3602 } 3603 3604 // It really isn't clear at all what this means, since properties 3605 // are "dynamic by default". 3606 if (Dynamic) 3607 S += ",D"; 3608 3609 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3610 S += ",N"; 3611 3612 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3613 S += ",G"; 3614 S += PD->getGetterName().getAsString(); 3615 } 3616 3617 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3618 S += ",S"; 3619 S += PD->getSetterName().getAsString(); 3620 } 3621 3622 if (SynthesizePID) { 3623 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3624 S += ",V"; 3625 S += OID->getNameAsString(); 3626 } 3627 3628 // FIXME: OBJCGC: weak & strong 3629} 3630 3631/// getLegacyIntegralTypeEncoding - 3632/// Another legacy compatibility encoding: 32-bit longs are encoded as 3633/// 'l' or 'L' , but not always. For typedefs, we need to use 3634/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3635/// 3636void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3637 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3638 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3639 if (BT->getKind() == BuiltinType::ULong && 3640 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3641 PointeeTy = UnsignedIntTy; 3642 else 3643 if (BT->getKind() == BuiltinType::Long && 3644 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3645 PointeeTy = IntTy; 3646 } 3647 } 3648} 3649 3650void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3651 const FieldDecl *Field) { 3652 // We follow the behavior of gcc, expanding structures which are 3653 // directly pointed to, and expanding embedded structures. Note that 3654 // these rules are sufficient to prevent recursive encoding of the 3655 // same type. 3656 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3657 true /* outermost type */); 3658} 3659 3660static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 3661 switch (T->getAs<BuiltinType>()->getKind()) { 3662 default: assert(0 && "Unhandled builtin type kind"); 3663 case BuiltinType::Void: return 'v'; 3664 case BuiltinType::Bool: return 'B'; 3665 case BuiltinType::Char_U: 3666 case BuiltinType::UChar: return 'C'; 3667 case BuiltinType::UShort: return 'S'; 3668 case BuiltinType::UInt: return 'I'; 3669 case BuiltinType::ULong: 3670 return 3671 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3672 case BuiltinType::UInt128: return 'T'; 3673 case BuiltinType::ULongLong: return 'Q'; 3674 case BuiltinType::Char_S: 3675 case BuiltinType::SChar: return 'c'; 3676 case BuiltinType::Short: return 's'; 3677 case BuiltinType::WChar: 3678 case BuiltinType::Int: return 'i'; 3679 case BuiltinType::Long: 3680 return 3681 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'l' : 'q'; 3682 case BuiltinType::LongLong: return 'q'; 3683 case BuiltinType::Int128: return 't'; 3684 case BuiltinType::Float: return 'f'; 3685 case BuiltinType::Double: return 'd'; 3686 case BuiltinType::LongDouble: return 'd'; 3687 } 3688} 3689 3690static void EncodeBitField(const ASTContext *Context, std::string& S, 3691 QualType T, const FieldDecl *FD) { 3692 const Expr *E = FD->getBitWidth(); 3693 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3694 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3695 S += 'b'; 3696 // The NeXT runtime encodes bit fields as b followed by the number of bits. 3697 // The GNU runtime requires more information; bitfields are encoded as b, 3698 // then the offset (in bits) of the first element, then the type of the 3699 // bitfield, then the size in bits. For example, in this structure: 3700 // 3701 // struct 3702 // { 3703 // int integer; 3704 // int flags:2; 3705 // }; 3706 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 3707 // runtime, but b32i2 for the GNU runtime. The reason for this extra 3708 // information is not especially sensible, but we're stuck with it for 3709 // compatibility with GCC, although providing it breaks anything that 3710 // actually uses runtime introspection and wants to work on both runtimes... 3711 if (!Ctx->getLangOptions().NeXTRuntime) { 3712 const RecordDecl *RD = FD->getParent(); 3713 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 3714 // FIXME: This same linear search is also used in ExprConstant - it might 3715 // be better if the FieldDecl stored its offset. We'd be increasing the 3716 // size of the object slightly, but saving some time every time it is used. 3717 unsigned i = 0; 3718 for (RecordDecl::field_iterator Field = RD->field_begin(), 3719 FieldEnd = RD->field_end(); 3720 Field != FieldEnd; (void)++Field, ++i) { 3721 if (*Field == FD) 3722 break; 3723 } 3724 S += llvm::utostr(RL.getFieldOffset(i)); 3725 S += ObjCEncodingForPrimitiveKind(Context, T); 3726 } 3727 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3728 S += llvm::utostr(N); 3729} 3730 3731// FIXME: Use SmallString for accumulating string. 3732void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3733 bool ExpandPointedToStructures, 3734 bool ExpandStructures, 3735 const FieldDecl *FD, 3736 bool OutermostType, 3737 bool EncodingProperty) { 3738 if (T->getAs<BuiltinType>()) { 3739 if (FD && FD->isBitField()) 3740 return EncodeBitField(this, S, T, FD); 3741 S += ObjCEncodingForPrimitiveKind(this, T); 3742 return; 3743 } 3744 3745 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3746 S += 'j'; 3747 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3748 false); 3749 return; 3750 } 3751 3752 // encoding for pointer or r3eference types. 3753 QualType PointeeTy; 3754 if (const PointerType *PT = T->getAs<PointerType>()) { 3755 if (PT->isObjCSelType()) { 3756 S += ':'; 3757 return; 3758 } 3759 PointeeTy = PT->getPointeeType(); 3760 } 3761 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3762 PointeeTy = RT->getPointeeType(); 3763 if (!PointeeTy.isNull()) { 3764 bool isReadOnly = false; 3765 // For historical/compatibility reasons, the read-only qualifier of the 3766 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3767 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3768 // Also, do not emit the 'r' for anything but the outermost type! 3769 if (isa<TypedefType>(T.getTypePtr())) { 3770 if (OutermostType && T.isConstQualified()) { 3771 isReadOnly = true; 3772 S += 'r'; 3773 } 3774 } else if (OutermostType) { 3775 QualType P = PointeeTy; 3776 while (P->getAs<PointerType>()) 3777 P = P->getAs<PointerType>()->getPointeeType(); 3778 if (P.isConstQualified()) { 3779 isReadOnly = true; 3780 S += 'r'; 3781 } 3782 } 3783 if (isReadOnly) { 3784 // Another legacy compatibility encoding. Some ObjC qualifier and type 3785 // combinations need to be rearranged. 3786 // Rewrite "in const" from "nr" to "rn" 3787 if (llvm::StringRef(S).endswith("nr")) 3788 S.replace(S.end()-2, S.end(), "rn"); 3789 } 3790 3791 if (PointeeTy->isCharType()) { 3792 // char pointer types should be encoded as '*' unless it is a 3793 // type that has been typedef'd to 'BOOL'. 3794 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3795 S += '*'; 3796 return; 3797 } 3798 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3799 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3800 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3801 S += '#'; 3802 return; 3803 } 3804 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3805 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3806 S += '@'; 3807 return; 3808 } 3809 // fall through... 3810 } 3811 S += '^'; 3812 getLegacyIntegralTypeEncoding(PointeeTy); 3813 3814 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3815 NULL); 3816 return; 3817 } 3818 3819 if (const ArrayType *AT = 3820 // Ignore type qualifiers etc. 3821 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3822 if (isa<IncompleteArrayType>(AT)) { 3823 // Incomplete arrays are encoded as a pointer to the array element. 3824 S += '^'; 3825 3826 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3827 false, ExpandStructures, FD); 3828 } else { 3829 S += '['; 3830 3831 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3832 S += llvm::utostr(CAT->getSize().getZExtValue()); 3833 else { 3834 //Variable length arrays are encoded as a regular array with 0 elements. 3835 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3836 S += '0'; 3837 } 3838 3839 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3840 false, ExpandStructures, FD); 3841 S += ']'; 3842 } 3843 return; 3844 } 3845 3846 if (T->getAs<FunctionType>()) { 3847 S += '?'; 3848 return; 3849 } 3850 3851 if (const RecordType *RTy = T->getAs<RecordType>()) { 3852 RecordDecl *RDecl = RTy->getDecl(); 3853 S += RDecl->isUnion() ? '(' : '{'; 3854 // Anonymous structures print as '?' 3855 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3856 S += II->getName(); 3857 if (ClassTemplateSpecializationDecl *Spec 3858 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 3859 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 3860 std::string TemplateArgsStr 3861 = TemplateSpecializationType::PrintTemplateArgumentList( 3862 TemplateArgs.getFlatArgumentList(), 3863 TemplateArgs.flat_size(), 3864 (*this).PrintingPolicy); 3865 3866 S += TemplateArgsStr; 3867 } 3868 } else { 3869 S += '?'; 3870 } 3871 if (ExpandStructures) { 3872 S += '='; 3873 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3874 FieldEnd = RDecl->field_end(); 3875 Field != FieldEnd; ++Field) { 3876 if (FD) { 3877 S += '"'; 3878 S += Field->getNameAsString(); 3879 S += '"'; 3880 } 3881 3882 // Special case bit-fields. 3883 if (Field->isBitField()) { 3884 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3885 (*Field)); 3886 } else { 3887 QualType qt = Field->getType(); 3888 getLegacyIntegralTypeEncoding(qt); 3889 getObjCEncodingForTypeImpl(qt, S, false, true, 3890 FD); 3891 } 3892 } 3893 } 3894 S += RDecl->isUnion() ? ')' : '}'; 3895 return; 3896 } 3897 3898 if (T->isEnumeralType()) { 3899 if (FD && FD->isBitField()) 3900 EncodeBitField(this, S, T, FD); 3901 else 3902 S += 'i'; 3903 return; 3904 } 3905 3906 if (T->isBlockPointerType()) { 3907 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3908 return; 3909 } 3910 3911 // Ignore protocol qualifiers when mangling at this level. 3912 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 3913 T = OT->getBaseType(); 3914 3915 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3916 // @encode(class_name) 3917 ObjCInterfaceDecl *OI = OIT->getDecl(); 3918 S += '{'; 3919 const IdentifierInfo *II = OI->getIdentifier(); 3920 S += II->getName(); 3921 S += '='; 3922 llvm::SmallVector<ObjCIvarDecl*, 32> Ivars; 3923 DeepCollectObjCIvars(OI, true, Ivars); 3924 for (unsigned i = 0, e = Ivars.size(); i != e; ++i) { 3925 FieldDecl *Field = cast<FieldDecl>(Ivars[i]); 3926 if (Field->isBitField()) 3927 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, Field); 3928 else 3929 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, FD); 3930 } 3931 S += '}'; 3932 return; 3933 } 3934 3935 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 3936 if (OPT->isObjCIdType()) { 3937 S += '@'; 3938 return; 3939 } 3940 3941 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 3942 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 3943 // Since this is a binary compatibility issue, need to consult with runtime 3944 // folks. Fortunately, this is a *very* obsure construct. 3945 S += '#'; 3946 return; 3947 } 3948 3949 if (OPT->isObjCQualifiedIdType()) { 3950 getObjCEncodingForTypeImpl(getObjCIdType(), S, 3951 ExpandPointedToStructures, 3952 ExpandStructures, FD); 3953 if (FD || EncodingProperty) { 3954 // Note that we do extended encoding of protocol qualifer list 3955 // Only when doing ivar or property encoding. 3956 S += '"'; 3957 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3958 E = OPT->qual_end(); I != E; ++I) { 3959 S += '<'; 3960 S += (*I)->getNameAsString(); 3961 S += '>'; 3962 } 3963 S += '"'; 3964 } 3965 return; 3966 } 3967 3968 QualType PointeeTy = OPT->getPointeeType(); 3969 if (!EncodingProperty && 3970 isa<TypedefType>(PointeeTy.getTypePtr())) { 3971 // Another historical/compatibility reason. 3972 // We encode the underlying type which comes out as 3973 // {...}; 3974 S += '^'; 3975 getObjCEncodingForTypeImpl(PointeeTy, S, 3976 false, ExpandPointedToStructures, 3977 NULL); 3978 return; 3979 } 3980 3981 S += '@'; 3982 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 3983 S += '"'; 3984 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 3985 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3986 E = OPT->qual_end(); I != E; ++I) { 3987 S += '<'; 3988 S += (*I)->getNameAsString(); 3989 S += '>'; 3990 } 3991 S += '"'; 3992 } 3993 return; 3994 } 3995 3996 // gcc just blithely ignores member pointers. 3997 // TODO: maybe there should be a mangling for these 3998 if (T->getAs<MemberPointerType>()) 3999 return; 4000 4001 assert(0 && "@encode for type not implemented!"); 4002} 4003 4004void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 4005 std::string& S) const { 4006 if (QT & Decl::OBJC_TQ_In) 4007 S += 'n'; 4008 if (QT & Decl::OBJC_TQ_Inout) 4009 S += 'N'; 4010 if (QT & Decl::OBJC_TQ_Out) 4011 S += 'o'; 4012 if (QT & Decl::OBJC_TQ_Bycopy) 4013 S += 'O'; 4014 if (QT & Decl::OBJC_TQ_Byref) 4015 S += 'R'; 4016 if (QT & Decl::OBJC_TQ_Oneway) 4017 S += 'V'; 4018} 4019 4020void ASTContext::setBuiltinVaListType(QualType T) { 4021 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 4022 4023 BuiltinVaListType = T; 4024} 4025 4026void ASTContext::setObjCIdType(QualType T) { 4027 ObjCIdTypedefType = T; 4028} 4029 4030void ASTContext::setObjCSelType(QualType T) { 4031 ObjCSelTypedefType = T; 4032} 4033 4034void ASTContext::setObjCProtoType(QualType QT) { 4035 ObjCProtoType = QT; 4036} 4037 4038void ASTContext::setObjCClassType(QualType T) { 4039 ObjCClassTypedefType = T; 4040} 4041 4042void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 4043 assert(ObjCConstantStringType.isNull() && 4044 "'NSConstantString' type already set!"); 4045 4046 ObjCConstantStringType = getObjCInterfaceType(Decl); 4047} 4048 4049/// \brief Retrieve the template name that corresponds to a non-empty 4050/// lookup. 4051TemplateName ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 4052 UnresolvedSetIterator End) { 4053 unsigned size = End - Begin; 4054 assert(size > 1 && "set is not overloaded!"); 4055 4056 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 4057 size * sizeof(FunctionTemplateDecl*)); 4058 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 4059 4060 NamedDecl **Storage = OT->getStorage(); 4061 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 4062 NamedDecl *D = *I; 4063 assert(isa<FunctionTemplateDecl>(D) || 4064 (isa<UsingShadowDecl>(D) && 4065 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 4066 *Storage++ = D; 4067 } 4068 4069 return TemplateName(OT); 4070} 4071 4072/// \brief Retrieve the template name that represents a qualified 4073/// template name such as \c std::vector. 4074TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 4075 bool TemplateKeyword, 4076 TemplateDecl *Template) { 4077 // FIXME: Canonicalization? 4078 llvm::FoldingSetNodeID ID; 4079 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 4080 4081 void *InsertPos = 0; 4082 QualifiedTemplateName *QTN = 4083 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4084 if (!QTN) { 4085 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 4086 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 4087 } 4088 4089 return TemplateName(QTN); 4090} 4091 4092/// \brief Retrieve the template name that represents a dependent 4093/// template name such as \c MetaFun::template apply. 4094TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4095 const IdentifierInfo *Name) { 4096 assert((!NNS || NNS->isDependent()) && 4097 "Nested name specifier must be dependent"); 4098 4099 llvm::FoldingSetNodeID ID; 4100 DependentTemplateName::Profile(ID, NNS, Name); 4101 4102 void *InsertPos = 0; 4103 DependentTemplateName *QTN = 4104 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4105 4106 if (QTN) 4107 return TemplateName(QTN); 4108 4109 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4110 if (CanonNNS == NNS) { 4111 QTN = new (*this,4) DependentTemplateName(NNS, Name); 4112 } else { 4113 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 4114 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 4115 DependentTemplateName *CheckQTN = 4116 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4117 assert(!CheckQTN && "Dependent type name canonicalization broken"); 4118 (void)CheckQTN; 4119 } 4120 4121 DependentTemplateNames.InsertNode(QTN, InsertPos); 4122 return TemplateName(QTN); 4123} 4124 4125/// \brief Retrieve the template name that represents a dependent 4126/// template name such as \c MetaFun::template operator+. 4127TemplateName 4128ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4129 OverloadedOperatorKind Operator) { 4130 assert((!NNS || NNS->isDependent()) && 4131 "Nested name specifier must be dependent"); 4132 4133 llvm::FoldingSetNodeID ID; 4134 DependentTemplateName::Profile(ID, NNS, Operator); 4135 4136 void *InsertPos = 0; 4137 DependentTemplateName *QTN 4138 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4139 4140 if (QTN) 4141 return TemplateName(QTN); 4142 4143 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4144 if (CanonNNS == NNS) { 4145 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 4146 } else { 4147 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 4148 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 4149 4150 DependentTemplateName *CheckQTN 4151 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4152 assert(!CheckQTN && "Dependent template name canonicalization broken"); 4153 (void)CheckQTN; 4154 } 4155 4156 DependentTemplateNames.InsertNode(QTN, InsertPos); 4157 return TemplateName(QTN); 4158} 4159 4160/// getFromTargetType - Given one of the integer types provided by 4161/// TargetInfo, produce the corresponding type. The unsigned @p Type 4162/// is actually a value of type @c TargetInfo::IntType. 4163CanQualType ASTContext::getFromTargetType(unsigned Type) const { 4164 switch (Type) { 4165 case TargetInfo::NoInt: return CanQualType(); 4166 case TargetInfo::SignedShort: return ShortTy; 4167 case TargetInfo::UnsignedShort: return UnsignedShortTy; 4168 case TargetInfo::SignedInt: return IntTy; 4169 case TargetInfo::UnsignedInt: return UnsignedIntTy; 4170 case TargetInfo::SignedLong: return LongTy; 4171 case TargetInfo::UnsignedLong: return UnsignedLongTy; 4172 case TargetInfo::SignedLongLong: return LongLongTy; 4173 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 4174 } 4175 4176 assert(false && "Unhandled TargetInfo::IntType value"); 4177 return CanQualType(); 4178} 4179 4180//===----------------------------------------------------------------------===// 4181// Type Predicates. 4182//===----------------------------------------------------------------------===// 4183 4184/// isObjCNSObjectType - Return true if this is an NSObject object using 4185/// NSObject attribute on a c-style pointer type. 4186/// FIXME - Make it work directly on types. 4187/// FIXME: Move to Type. 4188/// 4189bool ASTContext::isObjCNSObjectType(QualType Ty) const { 4190 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 4191 if (TypedefDecl *TD = TDT->getDecl()) 4192 if (TD->getAttr<ObjCNSObjectAttr>()) 4193 return true; 4194 } 4195 return false; 4196} 4197 4198/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 4199/// garbage collection attribute. 4200/// 4201Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 4202 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 4203 if (getLangOptions().ObjC1 && 4204 getLangOptions().getGCMode() != LangOptions::NonGC) { 4205 GCAttrs = Ty.getObjCGCAttr(); 4206 // Default behavious under objective-c's gc is for objective-c pointers 4207 // (or pointers to them) be treated as though they were declared 4208 // as __strong. 4209 if (GCAttrs == Qualifiers::GCNone) { 4210 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 4211 GCAttrs = Qualifiers::Strong; 4212 else if (Ty->isPointerType()) 4213 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 4214 } 4215 // Non-pointers have none gc'able attribute regardless of the attribute 4216 // set on them. 4217 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 4218 return Qualifiers::GCNone; 4219 } 4220 return GCAttrs; 4221} 4222 4223//===----------------------------------------------------------------------===// 4224// Type Compatibility Testing 4225//===----------------------------------------------------------------------===// 4226 4227/// areCompatVectorTypes - Return true if the two specified vector types are 4228/// compatible. 4229static bool areCompatVectorTypes(const VectorType *LHS, 4230 const VectorType *RHS) { 4231 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 4232 return LHS->getElementType() == RHS->getElementType() && 4233 LHS->getNumElements() == RHS->getNumElements(); 4234} 4235 4236bool ASTContext::areCompatibleVectorTypes(QualType FirstVec, 4237 QualType SecondVec) { 4238 assert(FirstVec->isVectorType() && "FirstVec should be a vector type"); 4239 assert(SecondVec->isVectorType() && "SecondVec should be a vector type"); 4240 4241 if (hasSameUnqualifiedType(FirstVec, SecondVec)) 4242 return true; 4243 4244 // AltiVec vectors types are identical to equivalent GCC vector types 4245 const VectorType *First = FirstVec->getAs<VectorType>(); 4246 const VectorType *Second = SecondVec->getAs<VectorType>(); 4247 if ((((First->getAltiVecSpecific() == VectorType::AltiVec) && 4248 (Second->getAltiVecSpecific() == VectorType::NotAltiVec)) || 4249 ((First->getAltiVecSpecific() == VectorType::NotAltiVec) && 4250 (Second->getAltiVecSpecific() == VectorType::AltiVec))) && 4251 hasSameType(First->getElementType(), Second->getElementType()) && 4252 (First->getNumElements() == Second->getNumElements())) 4253 return true; 4254 4255 return false; 4256} 4257 4258//===----------------------------------------------------------------------===// 4259// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 4260//===----------------------------------------------------------------------===// 4261 4262/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 4263/// inheritance hierarchy of 'rProto'. 4264bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 4265 ObjCProtocolDecl *rProto) { 4266 if (lProto == rProto) 4267 return true; 4268 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 4269 E = rProto->protocol_end(); PI != E; ++PI) 4270 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 4271 return true; 4272 return false; 4273} 4274 4275/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 4276/// return true if lhs's protocols conform to rhs's protocol; false 4277/// otherwise. 4278bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 4279 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 4280 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 4281 return false; 4282} 4283 4284/// ObjCQualifiedClassTypesAreCompatible - compare Class<p,...> and 4285/// Class<p1, ...>. 4286bool ASTContext::ObjCQualifiedClassTypesAreCompatible(QualType lhs, 4287 QualType rhs) { 4288 const ObjCObjectPointerType *lhsQID = lhs->getAs<ObjCObjectPointerType>(); 4289 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4290 assert ((lhsQID && rhsOPT) && "ObjCQualifiedClassTypesAreCompatible"); 4291 4292 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4293 E = lhsQID->qual_end(); I != E; ++I) { 4294 bool match = false; 4295 ObjCProtocolDecl *lhsProto = *I; 4296 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4297 E = rhsOPT->qual_end(); J != E; ++J) { 4298 ObjCProtocolDecl *rhsProto = *J; 4299 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto)) { 4300 match = true; 4301 break; 4302 } 4303 } 4304 if (!match) 4305 return false; 4306 } 4307 return true; 4308} 4309 4310/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 4311/// ObjCQualifiedIDType. 4312bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4313 bool compare) { 4314 // Allow id<P..> and an 'id' or void* type in all cases. 4315 if (lhs->isVoidPointerType() || 4316 lhs->isObjCIdType() || lhs->isObjCClassType()) 4317 return true; 4318 else if (rhs->isVoidPointerType() || 4319 rhs->isObjCIdType() || rhs->isObjCClassType()) 4320 return true; 4321 4322 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4323 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4324 4325 if (!rhsOPT) return false; 4326 4327 if (rhsOPT->qual_empty()) { 4328 // If the RHS is a unqualified interface pointer "NSString*", 4329 // make sure we check the class hierarchy. 4330 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4331 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4332 E = lhsQID->qual_end(); I != E; ++I) { 4333 // when comparing an id<P> on lhs with a static type on rhs, 4334 // see if static class implements all of id's protocols, directly or 4335 // through its super class and categories. 4336 if (!rhsID->ClassImplementsProtocol(*I, true)) 4337 return false; 4338 } 4339 } 4340 // If there are no qualifiers and no interface, we have an 'id'. 4341 return true; 4342 } 4343 // Both the right and left sides have qualifiers. 4344 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4345 E = lhsQID->qual_end(); I != E; ++I) { 4346 ObjCProtocolDecl *lhsProto = *I; 4347 bool match = false; 4348 4349 // when comparing an id<P> on lhs with a static type on rhs, 4350 // see if static class implements all of id's protocols, directly or 4351 // through its super class and categories. 4352 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4353 E = rhsOPT->qual_end(); J != E; ++J) { 4354 ObjCProtocolDecl *rhsProto = *J; 4355 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4356 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4357 match = true; 4358 break; 4359 } 4360 } 4361 // If the RHS is a qualified interface pointer "NSString<P>*", 4362 // make sure we check the class hierarchy. 4363 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4364 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4365 E = lhsQID->qual_end(); I != E; ++I) { 4366 // when comparing an id<P> on lhs with a static type on rhs, 4367 // see if static class implements all of id's protocols, directly or 4368 // through its super class and categories. 4369 if (rhsID->ClassImplementsProtocol(*I, true)) { 4370 match = true; 4371 break; 4372 } 4373 } 4374 } 4375 if (!match) 4376 return false; 4377 } 4378 4379 return true; 4380 } 4381 4382 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4383 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4384 4385 if (const ObjCObjectPointerType *lhsOPT = 4386 lhs->getAsObjCInterfacePointerType()) { 4387 if (lhsOPT->qual_empty()) { 4388 bool match = false; 4389 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4390 for (ObjCObjectPointerType::qual_iterator I = rhsQID->qual_begin(), 4391 E = rhsQID->qual_end(); I != E; ++I) { 4392 // when comparing an id<P> on rhs with a static type on lhs, 4393 // static class must implement all of id's protocols directly or 4394 // indirectly through its super class. 4395 if (lhsID->ClassImplementsProtocol(*I, true)) { 4396 match = true; 4397 break; 4398 } 4399 } 4400 if (!match) 4401 return false; 4402 } 4403 return true; 4404 } 4405 // Both the right and left sides have qualifiers. 4406 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4407 E = lhsOPT->qual_end(); I != E; ++I) { 4408 ObjCProtocolDecl *lhsProto = *I; 4409 bool match = false; 4410 4411 // when comparing an id<P> on lhs with a static type on rhs, 4412 // see if static class implements all of id's protocols, directly or 4413 // through its super class and categories. 4414 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4415 E = rhsQID->qual_end(); J != E; ++J) { 4416 ObjCProtocolDecl *rhsProto = *J; 4417 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4418 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4419 match = true; 4420 break; 4421 } 4422 } 4423 if (!match) 4424 return false; 4425 } 4426 return true; 4427 } 4428 return false; 4429} 4430 4431/// canAssignObjCInterfaces - Return true if the two interface types are 4432/// compatible for assignment from RHS to LHS. This handles validation of any 4433/// protocol qualifiers on the LHS or RHS. 4434/// 4435bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4436 const ObjCObjectPointerType *RHSOPT) { 4437 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4438 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4439 4440 // If either type represents the built-in 'id' or 'Class' types, return true. 4441 if (LHS->isObjCUnqualifiedIdOrClass() || 4442 RHS->isObjCUnqualifiedIdOrClass()) 4443 return true; 4444 4445 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 4446 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4447 QualType(RHSOPT,0), 4448 false); 4449 4450 if (LHS->isObjCQualifiedClass() && RHS->isObjCQualifiedClass()) 4451 return ObjCQualifiedClassTypesAreCompatible(QualType(LHSOPT,0), 4452 QualType(RHSOPT,0)); 4453 4454 // If we have 2 user-defined types, fall into that path. 4455 if (LHS->getInterface() && RHS->getInterface()) 4456 return canAssignObjCInterfaces(LHS, RHS); 4457 4458 return false; 4459} 4460 4461/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4462/// for providing type-safty for objective-c pointers used to pass/return 4463/// arguments in block literals. When passed as arguments, passing 'A*' where 4464/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4465/// not OK. For the return type, the opposite is not OK. 4466bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4467 const ObjCObjectPointerType *LHSOPT, 4468 const ObjCObjectPointerType *RHSOPT) { 4469 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4470 return true; 4471 4472 if (LHSOPT->isObjCBuiltinType()) { 4473 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4474 } 4475 4476 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4477 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4478 QualType(RHSOPT,0), 4479 false); 4480 4481 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4482 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4483 if (LHS && RHS) { // We have 2 user-defined types. 4484 if (LHS != RHS) { 4485 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4486 return false; 4487 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4488 return true; 4489 } 4490 else 4491 return true; 4492 } 4493 return false; 4494} 4495 4496/// getIntersectionOfProtocols - This routine finds the intersection of set 4497/// of protocols inherited from two distinct objective-c pointer objects. 4498/// It is used to build composite qualifier list of the composite type of 4499/// the conditional expression involving two objective-c pointer objects. 4500static 4501void getIntersectionOfProtocols(ASTContext &Context, 4502 const ObjCObjectPointerType *LHSOPT, 4503 const ObjCObjectPointerType *RHSOPT, 4504 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4505 4506 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4507 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4508 assert(LHS->getInterface() && "LHS must have an interface base"); 4509 assert(RHS->getInterface() && "RHS must have an interface base"); 4510 4511 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4512 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4513 if (LHSNumProtocols > 0) 4514 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4515 else { 4516 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4517 Context.CollectInheritedProtocols(LHS->getInterface(), 4518 LHSInheritedProtocols); 4519 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4520 LHSInheritedProtocols.end()); 4521 } 4522 4523 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4524 if (RHSNumProtocols > 0) { 4525 ObjCProtocolDecl **RHSProtocols = 4526 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4527 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4528 if (InheritedProtocolSet.count(RHSProtocols[i])) 4529 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4530 } 4531 else { 4532 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4533 Context.CollectInheritedProtocols(RHS->getInterface(), 4534 RHSInheritedProtocols); 4535 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4536 RHSInheritedProtocols.begin(), 4537 E = RHSInheritedProtocols.end(); I != E; ++I) 4538 if (InheritedProtocolSet.count((*I))) 4539 IntersectionOfProtocols.push_back((*I)); 4540 } 4541} 4542 4543/// areCommonBaseCompatible - Returns common base class of the two classes if 4544/// one found. Note that this is O'2 algorithm. But it will be called as the 4545/// last type comparison in a ?-exp of ObjC pointer types before a 4546/// warning is issued. So, its invokation is extremely rare. 4547QualType ASTContext::areCommonBaseCompatible( 4548 const ObjCObjectPointerType *Lptr, 4549 const ObjCObjectPointerType *Rptr) { 4550 const ObjCObjectType *LHS = Lptr->getObjectType(); 4551 const ObjCObjectType *RHS = Rptr->getObjectType(); 4552 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 4553 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 4554 if (!LDecl || !RDecl) 4555 return QualType(); 4556 4557 while ((LDecl = LDecl->getSuperClass())) { 4558 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 4559 if (canAssignObjCInterfaces(LHS, RHS)) { 4560 llvm::SmallVector<ObjCProtocolDecl *, 8> Protocols; 4561 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 4562 4563 QualType Result = QualType(LHS, 0); 4564 if (!Protocols.empty()) 4565 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 4566 Result = getObjCObjectPointerType(Result); 4567 return Result; 4568 } 4569 } 4570 4571 return QualType(); 4572} 4573 4574bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 4575 const ObjCObjectType *RHS) { 4576 assert(LHS->getInterface() && "LHS is not an interface type"); 4577 assert(RHS->getInterface() && "RHS is not an interface type"); 4578 4579 // Verify that the base decls are compatible: the RHS must be a subclass of 4580 // the LHS. 4581 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 4582 return false; 4583 4584 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4585 // protocol qualified at all, then we are good. 4586 if (LHS->getNumProtocols() == 0) 4587 return true; 4588 4589 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4590 // isn't a superset. 4591 if (RHS->getNumProtocols() == 0) 4592 return true; // FIXME: should return false! 4593 4594 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 4595 LHSPE = LHS->qual_end(); 4596 LHSPI != LHSPE; LHSPI++) { 4597 bool RHSImplementsProtocol = false; 4598 4599 // If the RHS doesn't implement the protocol on the left, the types 4600 // are incompatible. 4601 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 4602 RHSPE = RHS->qual_end(); 4603 RHSPI != RHSPE; RHSPI++) { 4604 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4605 RHSImplementsProtocol = true; 4606 break; 4607 } 4608 } 4609 // FIXME: For better diagnostics, consider passing back the protocol name. 4610 if (!RHSImplementsProtocol) 4611 return false; 4612 } 4613 // The RHS implements all protocols listed on the LHS. 4614 return true; 4615} 4616 4617bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4618 // get the "pointed to" types 4619 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4620 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4621 4622 if (!LHSOPT || !RHSOPT) 4623 return false; 4624 4625 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4626 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4627} 4628 4629bool ASTContext::canBindObjCObjectType(QualType To, QualType From) { 4630 return canAssignObjCInterfaces( 4631 getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(), 4632 getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>()); 4633} 4634 4635/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4636/// both shall have the identically qualified version of a compatible type. 4637/// C99 6.2.7p1: Two types have compatible types if their types are the 4638/// same. See 6.7.[2,3,5] for additional rules. 4639bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS, 4640 bool CompareUnqualified) { 4641 if (getLangOptions().CPlusPlus) 4642 return hasSameType(LHS, RHS); 4643 4644 return !mergeTypes(LHS, RHS, false, CompareUnqualified).isNull(); 4645} 4646 4647bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 4648 return !mergeTypes(LHS, RHS, true).isNull(); 4649} 4650 4651QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 4652 bool OfBlockPointer, 4653 bool Unqualified) { 4654 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4655 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4656 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4657 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4658 bool allLTypes = true; 4659 bool allRTypes = true; 4660 4661 // Check return type 4662 QualType retType; 4663 if (OfBlockPointer) 4664 retType = mergeTypes(rbase->getResultType(), lbase->getResultType(), true, 4665 Unqualified); 4666 else 4667 retType = mergeTypes(lbase->getResultType(), rbase->getResultType(), 4668 false, Unqualified); 4669 if (retType.isNull()) return QualType(); 4670 4671 if (Unqualified) 4672 retType = retType.getUnqualifiedType(); 4673 4674 CanQualType LRetType = getCanonicalType(lbase->getResultType()); 4675 CanQualType RRetType = getCanonicalType(rbase->getResultType()); 4676 if (Unqualified) { 4677 LRetType = LRetType.getUnqualifiedType(); 4678 RRetType = RRetType.getUnqualifiedType(); 4679 } 4680 4681 if (getCanonicalType(retType) != LRetType) 4682 allLTypes = false; 4683 if (getCanonicalType(retType) != RRetType) 4684 allRTypes = false; 4685 // FIXME: double check this 4686 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 4687 // rbase->getRegParmAttr() != 0 && 4688 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 4689 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 4690 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 4691 unsigned RegParm = lbaseInfo.getRegParm() == 0 ? rbaseInfo.getRegParm() : 4692 lbaseInfo.getRegParm(); 4693 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 4694 if (NoReturn != lbaseInfo.getNoReturn() || 4695 RegParm != lbaseInfo.getRegParm()) 4696 allLTypes = false; 4697 if (NoReturn != rbaseInfo.getNoReturn() || 4698 RegParm != rbaseInfo.getRegParm()) 4699 allRTypes = false; 4700 CallingConv lcc = lbaseInfo.getCC(); 4701 CallingConv rcc = rbaseInfo.getCC(); 4702 // Compatible functions must have compatible calling conventions 4703 if (!isSameCallConv(lcc, rcc)) 4704 return QualType(); 4705 4706 if (lproto && rproto) { // two C99 style function prototypes 4707 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4708 "C++ shouldn't be here"); 4709 unsigned lproto_nargs = lproto->getNumArgs(); 4710 unsigned rproto_nargs = rproto->getNumArgs(); 4711 4712 // Compatible functions must have the same number of arguments 4713 if (lproto_nargs != rproto_nargs) 4714 return QualType(); 4715 4716 // Variadic and non-variadic functions aren't compatible 4717 if (lproto->isVariadic() != rproto->isVariadic()) 4718 return QualType(); 4719 4720 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4721 return QualType(); 4722 4723 // Check argument compatibility 4724 llvm::SmallVector<QualType, 10> types; 4725 for (unsigned i = 0; i < lproto_nargs; i++) { 4726 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4727 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4728 QualType argtype = mergeTypes(largtype, rargtype, OfBlockPointer, 4729 Unqualified); 4730 if (argtype.isNull()) return QualType(); 4731 4732 if (Unqualified) 4733 argtype = argtype.getUnqualifiedType(); 4734 4735 types.push_back(argtype); 4736 if (Unqualified) { 4737 largtype = largtype.getUnqualifiedType(); 4738 rargtype = rargtype.getUnqualifiedType(); 4739 } 4740 4741 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4742 allLTypes = false; 4743 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4744 allRTypes = false; 4745 } 4746 if (allLTypes) return lhs; 4747 if (allRTypes) return rhs; 4748 return getFunctionType(retType, types.begin(), types.size(), 4749 lproto->isVariadic(), lproto->getTypeQuals(), 4750 false, false, 0, 0, 4751 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4752 } 4753 4754 if (lproto) allRTypes = false; 4755 if (rproto) allLTypes = false; 4756 4757 const FunctionProtoType *proto = lproto ? lproto : rproto; 4758 if (proto) { 4759 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4760 if (proto->isVariadic()) return QualType(); 4761 // Check that the types are compatible with the types that 4762 // would result from default argument promotions (C99 6.7.5.3p15). 4763 // The only types actually affected are promotable integer 4764 // types and floats, which would be passed as a different 4765 // type depending on whether the prototype is visible. 4766 unsigned proto_nargs = proto->getNumArgs(); 4767 for (unsigned i = 0; i < proto_nargs; ++i) { 4768 QualType argTy = proto->getArgType(i); 4769 4770 // Look at the promotion type of enum types, since that is the type used 4771 // to pass enum values. 4772 if (const EnumType *Enum = argTy->getAs<EnumType>()) 4773 argTy = Enum->getDecl()->getPromotionType(); 4774 4775 if (argTy->isPromotableIntegerType() || 4776 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4777 return QualType(); 4778 } 4779 4780 if (allLTypes) return lhs; 4781 if (allRTypes) return rhs; 4782 return getFunctionType(retType, proto->arg_type_begin(), 4783 proto->getNumArgs(), proto->isVariadic(), 4784 proto->getTypeQuals(), 4785 false, false, 0, 0, 4786 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4787 } 4788 4789 if (allLTypes) return lhs; 4790 if (allRTypes) return rhs; 4791 FunctionType::ExtInfo Info(NoReturn, RegParm, lcc); 4792 return getFunctionNoProtoType(retType, Info); 4793} 4794 4795QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 4796 bool OfBlockPointer, 4797 bool Unqualified) { 4798 // C++ [expr]: If an expression initially has the type "reference to T", the 4799 // type is adjusted to "T" prior to any further analysis, the expression 4800 // designates the object or function denoted by the reference, and the 4801 // expression is an lvalue unless the reference is an rvalue reference and 4802 // the expression is a function call (possibly inside parentheses). 4803 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 4804 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 4805 4806 if (Unqualified) { 4807 LHS = LHS.getUnqualifiedType(); 4808 RHS = RHS.getUnqualifiedType(); 4809 } 4810 4811 QualType LHSCan = getCanonicalType(LHS), 4812 RHSCan = getCanonicalType(RHS); 4813 4814 // If two types are identical, they are compatible. 4815 if (LHSCan == RHSCan) 4816 return LHS; 4817 4818 // If the qualifiers are different, the types aren't compatible... mostly. 4819 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4820 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4821 if (LQuals != RQuals) { 4822 // If any of these qualifiers are different, we have a type 4823 // mismatch. 4824 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4825 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4826 return QualType(); 4827 4828 // Exactly one GC qualifier difference is allowed: __strong is 4829 // okay if the other type has no GC qualifier but is an Objective 4830 // C object pointer (i.e. implicitly strong by default). We fix 4831 // this by pretending that the unqualified type was actually 4832 // qualified __strong. 4833 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4834 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4835 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4836 4837 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4838 return QualType(); 4839 4840 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4841 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4842 } 4843 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4844 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4845 } 4846 return QualType(); 4847 } 4848 4849 // Okay, qualifiers are equal. 4850 4851 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4852 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4853 4854 // We want to consider the two function types to be the same for these 4855 // comparisons, just force one to the other. 4856 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 4857 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 4858 4859 // Same as above for arrays 4860 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 4861 LHSClass = Type::ConstantArray; 4862 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 4863 RHSClass = Type::ConstantArray; 4864 4865 // ObjCInterfaces are just specialized ObjCObjects. 4866 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 4867 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 4868 4869 // Canonicalize ExtVector -> Vector. 4870 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 4871 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 4872 4873 // If the canonical type classes don't match. 4874 if (LHSClass != RHSClass) { 4875 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 4876 // a signed integer type, or an unsigned integer type. 4877 // Compatibility is based on the underlying type, not the promotion 4878 // type. 4879 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 4880 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 4881 return RHS; 4882 } 4883 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 4884 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 4885 return LHS; 4886 } 4887 4888 return QualType(); 4889 } 4890 4891 // The canonical type classes match. 4892 switch (LHSClass) { 4893#define TYPE(Class, Base) 4894#define ABSTRACT_TYPE(Class, Base) 4895#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 4896#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4897#define DEPENDENT_TYPE(Class, Base) case Type::Class: 4898#include "clang/AST/TypeNodes.def" 4899 assert(false && "Non-canonical and dependent types shouldn't get here"); 4900 return QualType(); 4901 4902 case Type::LValueReference: 4903 case Type::RValueReference: 4904 case Type::MemberPointer: 4905 assert(false && "C++ should never be in mergeTypes"); 4906 return QualType(); 4907 4908 case Type::ObjCInterface: 4909 case Type::IncompleteArray: 4910 case Type::VariableArray: 4911 case Type::FunctionProto: 4912 case Type::ExtVector: 4913 assert(false && "Types are eliminated above"); 4914 return QualType(); 4915 4916 case Type::Pointer: 4917 { 4918 // Merge two pointer types, while trying to preserve typedef info 4919 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 4920 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 4921 if (Unqualified) { 4922 LHSPointee = LHSPointee.getUnqualifiedType(); 4923 RHSPointee = RHSPointee.getUnqualifiedType(); 4924 } 4925 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, false, 4926 Unqualified); 4927 if (ResultType.isNull()) return QualType(); 4928 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4929 return LHS; 4930 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4931 return RHS; 4932 return getPointerType(ResultType); 4933 } 4934 case Type::BlockPointer: 4935 { 4936 // Merge two block pointer types, while trying to preserve typedef info 4937 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 4938 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 4939 if (Unqualified) { 4940 LHSPointee = LHSPointee.getUnqualifiedType(); 4941 RHSPointee = RHSPointee.getUnqualifiedType(); 4942 } 4943 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer, 4944 Unqualified); 4945 if (ResultType.isNull()) return QualType(); 4946 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4947 return LHS; 4948 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4949 return RHS; 4950 return getBlockPointerType(ResultType); 4951 } 4952 case Type::ConstantArray: 4953 { 4954 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 4955 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 4956 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 4957 return QualType(); 4958 4959 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 4960 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 4961 if (Unqualified) { 4962 LHSElem = LHSElem.getUnqualifiedType(); 4963 RHSElem = RHSElem.getUnqualifiedType(); 4964 } 4965 4966 QualType ResultType = mergeTypes(LHSElem, RHSElem, false, Unqualified); 4967 if (ResultType.isNull()) return QualType(); 4968 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4969 return LHS; 4970 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4971 return RHS; 4972 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 4973 ArrayType::ArraySizeModifier(), 0); 4974 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 4975 ArrayType::ArraySizeModifier(), 0); 4976 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 4977 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 4978 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4979 return LHS; 4980 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4981 return RHS; 4982 if (LVAT) { 4983 // FIXME: This isn't correct! But tricky to implement because 4984 // the array's size has to be the size of LHS, but the type 4985 // has to be different. 4986 return LHS; 4987 } 4988 if (RVAT) { 4989 // FIXME: This isn't correct! But tricky to implement because 4990 // the array's size has to be the size of RHS, but the type 4991 // has to be different. 4992 return RHS; 4993 } 4994 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 4995 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 4996 return getIncompleteArrayType(ResultType, 4997 ArrayType::ArraySizeModifier(), 0); 4998 } 4999 case Type::FunctionNoProto: 5000 return mergeFunctionTypes(LHS, RHS, OfBlockPointer, Unqualified); 5001 case Type::Record: 5002 case Type::Enum: 5003 return QualType(); 5004 case Type::Builtin: 5005 // Only exactly equal builtin types are compatible, which is tested above. 5006 return QualType(); 5007 case Type::Complex: 5008 // Distinct complex types are incompatible. 5009 return QualType(); 5010 case Type::Vector: 5011 // FIXME: The merged type should be an ExtVector! 5012 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 5013 RHSCan->getAs<VectorType>())) 5014 return LHS; 5015 return QualType(); 5016 case Type::ObjCObject: { 5017 // Check if the types are assignment compatible. 5018 // FIXME: This should be type compatibility, e.g. whether 5019 // "LHS x; RHS x;" at global scope is legal. 5020 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 5021 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 5022 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 5023 return LHS; 5024 5025 return QualType(); 5026 } 5027 case Type::ObjCObjectPointer: { 5028 if (OfBlockPointer) { 5029 if (canAssignObjCInterfacesInBlockPointer( 5030 LHS->getAs<ObjCObjectPointerType>(), 5031 RHS->getAs<ObjCObjectPointerType>())) 5032 return LHS; 5033 return QualType(); 5034 } 5035 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 5036 RHS->getAs<ObjCObjectPointerType>())) 5037 return LHS; 5038 5039 return QualType(); 5040 } 5041 } 5042 5043 return QualType(); 5044} 5045 5046/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 5047/// 'RHS' attributes and returns the merged version; including for function 5048/// return types. 5049QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 5050 QualType LHSCan = getCanonicalType(LHS), 5051 RHSCan = getCanonicalType(RHS); 5052 // If two types are identical, they are compatible. 5053 if (LHSCan == RHSCan) 5054 return LHS; 5055 if (RHSCan->isFunctionType()) { 5056 if (!LHSCan->isFunctionType()) 5057 return QualType(); 5058 QualType OldReturnType = 5059 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 5060 QualType NewReturnType = 5061 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 5062 QualType ResReturnType = 5063 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 5064 if (ResReturnType.isNull()) 5065 return QualType(); 5066 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 5067 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 5068 // In either case, use OldReturnType to build the new function type. 5069 const FunctionType *F = LHS->getAs<FunctionType>(); 5070 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 5071 FunctionType::ExtInfo Info = getFunctionExtInfo(LHS); 5072 QualType ResultType 5073 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 5074 FPT->getNumArgs(), FPT->isVariadic(), 5075 FPT->getTypeQuals(), 5076 FPT->hasExceptionSpec(), 5077 FPT->hasAnyExceptionSpec(), 5078 FPT->getNumExceptions(), 5079 FPT->exception_begin(), 5080 Info); 5081 return ResultType; 5082 } 5083 } 5084 return QualType(); 5085 } 5086 5087 // If the qualifiers are different, the types can still be merged. 5088 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5089 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5090 if (LQuals != RQuals) { 5091 // If any of these qualifiers are different, we have a type mismatch. 5092 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5093 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5094 return QualType(); 5095 5096 // Exactly one GC qualifier difference is allowed: __strong is 5097 // okay if the other type has no GC qualifier but is an Objective 5098 // C object pointer (i.e. implicitly strong by default). We fix 5099 // this by pretending that the unqualified type was actually 5100 // qualified __strong. 5101 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5102 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5103 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5104 5105 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5106 return QualType(); 5107 5108 if (GC_L == Qualifiers::Strong) 5109 return LHS; 5110 if (GC_R == Qualifiers::Strong) 5111 return RHS; 5112 return QualType(); 5113 } 5114 5115 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 5116 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5117 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5118 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 5119 if (ResQT == LHSBaseQT) 5120 return LHS; 5121 if (ResQT == RHSBaseQT) 5122 return RHS; 5123 } 5124 return QualType(); 5125} 5126 5127//===----------------------------------------------------------------------===// 5128// Integer Predicates 5129//===----------------------------------------------------------------------===// 5130 5131unsigned ASTContext::getIntWidth(QualType T) { 5132 if (T->isBooleanType()) 5133 return 1; 5134 if (EnumType *ET = dyn_cast<EnumType>(T)) 5135 T = ET->getDecl()->getIntegerType(); 5136 // For builtin types, just use the standard type sizing method 5137 return (unsigned)getTypeSize(T); 5138} 5139 5140QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 5141 assert(T->hasSignedIntegerRepresentation() && "Unexpected type"); 5142 5143 // Turn <4 x signed int> -> <4 x unsigned int> 5144 if (const VectorType *VTy = T->getAs<VectorType>()) 5145 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 5146 VTy->getNumElements(), VTy->getAltiVecSpecific()); 5147 5148 // For enums, we return the unsigned version of the base type. 5149 if (const EnumType *ETy = T->getAs<EnumType>()) 5150 T = ETy->getDecl()->getIntegerType(); 5151 5152 const BuiltinType *BTy = T->getAs<BuiltinType>(); 5153 assert(BTy && "Unexpected signed integer type"); 5154 switch (BTy->getKind()) { 5155 case BuiltinType::Char_S: 5156 case BuiltinType::SChar: 5157 return UnsignedCharTy; 5158 case BuiltinType::Short: 5159 return UnsignedShortTy; 5160 case BuiltinType::Int: 5161 return UnsignedIntTy; 5162 case BuiltinType::Long: 5163 return UnsignedLongTy; 5164 case BuiltinType::LongLong: 5165 return UnsignedLongLongTy; 5166 case BuiltinType::Int128: 5167 return UnsignedInt128Ty; 5168 default: 5169 assert(0 && "Unexpected signed integer type"); 5170 return QualType(); 5171 } 5172} 5173 5174ExternalASTSource::~ExternalASTSource() { } 5175 5176void ExternalASTSource::PrintStats() { } 5177 5178 5179//===----------------------------------------------------------------------===// 5180// Builtin Type Computation 5181//===----------------------------------------------------------------------===// 5182 5183/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 5184/// pointer over the consumed characters. This returns the resultant type. 5185static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 5186 ASTContext::GetBuiltinTypeError &Error, 5187 bool AllowTypeModifiers = true) { 5188 // Modifiers. 5189 int HowLong = 0; 5190 bool Signed = false, Unsigned = false; 5191 bool RequiresIntegerConstant = false; 5192 5193 // Read the modifiers first. 5194 bool Done = false; 5195 while (!Done) { 5196 switch (*Str++) { 5197 default: Done = true; --Str; break; 5198 case 'I': 5199 RequiresIntegerConstant = true; 5200 break; 5201 case 'S': 5202 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 5203 assert(!Signed && "Can't use 'S' modifier multiple times!"); 5204 Signed = true; 5205 break; 5206 case 'U': 5207 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 5208 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 5209 Unsigned = true; 5210 break; 5211 case 'L': 5212 assert(HowLong <= 2 && "Can't have LLLL modifier"); 5213 ++HowLong; 5214 break; 5215 } 5216 } 5217 5218 QualType Type; 5219 5220 // Read the base type. 5221 switch (*Str++) { 5222 default: assert(0 && "Unknown builtin type letter!"); 5223 case 'v': 5224 assert(HowLong == 0 && !Signed && !Unsigned && 5225 "Bad modifiers used with 'v'!"); 5226 Type = Context.VoidTy; 5227 break; 5228 case 'f': 5229 assert(HowLong == 0 && !Signed && !Unsigned && 5230 "Bad modifiers used with 'f'!"); 5231 Type = Context.FloatTy; 5232 break; 5233 case 'd': 5234 assert(HowLong < 2 && !Signed && !Unsigned && 5235 "Bad modifiers used with 'd'!"); 5236 if (HowLong) 5237 Type = Context.LongDoubleTy; 5238 else 5239 Type = Context.DoubleTy; 5240 break; 5241 case 's': 5242 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 5243 if (Unsigned) 5244 Type = Context.UnsignedShortTy; 5245 else 5246 Type = Context.ShortTy; 5247 break; 5248 case 'i': 5249 if (HowLong == 3) 5250 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 5251 else if (HowLong == 2) 5252 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 5253 else if (HowLong == 1) 5254 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 5255 else 5256 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 5257 break; 5258 case 'c': 5259 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 5260 if (Signed) 5261 Type = Context.SignedCharTy; 5262 else if (Unsigned) 5263 Type = Context.UnsignedCharTy; 5264 else 5265 Type = Context.CharTy; 5266 break; 5267 case 'b': // boolean 5268 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 5269 Type = Context.BoolTy; 5270 break; 5271 case 'z': // size_t. 5272 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 5273 Type = Context.getSizeType(); 5274 break; 5275 case 'F': 5276 Type = Context.getCFConstantStringType(); 5277 break; 5278 case 'a': 5279 Type = Context.getBuiltinVaListType(); 5280 assert(!Type.isNull() && "builtin va list type not initialized!"); 5281 break; 5282 case 'A': 5283 // This is a "reference" to a va_list; however, what exactly 5284 // this means depends on how va_list is defined. There are two 5285 // different kinds of va_list: ones passed by value, and ones 5286 // passed by reference. An example of a by-value va_list is 5287 // x86, where va_list is a char*. An example of by-ref va_list 5288 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 5289 // we want this argument to be a char*&; for x86-64, we want 5290 // it to be a __va_list_tag*. 5291 Type = Context.getBuiltinVaListType(); 5292 assert(!Type.isNull() && "builtin va list type not initialized!"); 5293 if (Type->isArrayType()) { 5294 Type = Context.getArrayDecayedType(Type); 5295 } else { 5296 Type = Context.getLValueReferenceType(Type); 5297 } 5298 break; 5299 case 'V': { 5300 char *End; 5301 unsigned NumElements = strtoul(Str, &End, 10); 5302 assert(End != Str && "Missing vector size"); 5303 5304 Str = End; 5305 5306 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 5307 // FIXME: Don't know what to do about AltiVec. 5308 Type = Context.getVectorType(ElementType, NumElements, 5309 VectorType::NotAltiVec); 5310 break; 5311 } 5312 case 'X': { 5313 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 5314 Type = Context.getComplexType(ElementType); 5315 break; 5316 } 5317 case 'P': 5318 Type = Context.getFILEType(); 5319 if (Type.isNull()) { 5320 Error = ASTContext::GE_Missing_stdio; 5321 return QualType(); 5322 } 5323 break; 5324 case 'J': 5325 if (Signed) 5326 Type = Context.getsigjmp_bufType(); 5327 else 5328 Type = Context.getjmp_bufType(); 5329 5330 if (Type.isNull()) { 5331 Error = ASTContext::GE_Missing_setjmp; 5332 return QualType(); 5333 } 5334 break; 5335 } 5336 5337 if (!AllowTypeModifiers) 5338 return Type; 5339 5340 Done = false; 5341 while (!Done) { 5342 switch (char c = *Str++) { 5343 default: Done = true; --Str; break; 5344 case '*': 5345 case '&': 5346 { 5347 // Both pointers and references can have their pointee types 5348 // qualified with an address space. 5349 char *End; 5350 unsigned AddrSpace = strtoul(Str, &End, 10); 5351 if (End != Str && AddrSpace != 0) { 5352 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 5353 Str = End; 5354 } 5355 } 5356 if (c == '*') 5357 Type = Context.getPointerType(Type); 5358 else 5359 Type = Context.getLValueReferenceType(Type); 5360 break; 5361 // FIXME: There's no way to have a built-in with an rvalue ref arg. 5362 case 'C': 5363 Type = Type.withConst(); 5364 break; 5365 case 'D': 5366 Type = Context.getVolatileType(Type); 5367 break; 5368 } 5369 } 5370 5371 assert((!RequiresIntegerConstant || Type->isIntegralOrEnumerationType()) && 5372 "Integer constant 'I' type must be an integer"); 5373 5374 return Type; 5375} 5376 5377/// GetBuiltinType - Return the type for the specified builtin. 5378QualType ASTContext::GetBuiltinType(unsigned id, 5379 GetBuiltinTypeError &Error) { 5380 const char *TypeStr = BuiltinInfo.GetTypeString(id); 5381 5382 llvm::SmallVector<QualType, 8> ArgTypes; 5383 5384 Error = GE_None; 5385 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 5386 if (Error != GE_None) 5387 return QualType(); 5388 while (TypeStr[0] && TypeStr[0] != '.') { 5389 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 5390 if (Error != GE_None) 5391 return QualType(); 5392 5393 // Do array -> pointer decay. The builtin should use the decayed type. 5394 if (Ty->isArrayType()) 5395 Ty = getArrayDecayedType(Ty); 5396 5397 ArgTypes.push_back(Ty); 5398 } 5399 5400 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 5401 "'.' should only occur at end of builtin type list!"); 5402 5403 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 5404 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 5405 return getFunctionNoProtoType(ResType); 5406 5407 // FIXME: Should we create noreturn types? 5408 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 5409 TypeStr[0] == '.', 0, false, false, 0, 0, 5410 FunctionType::ExtInfo()); 5411} 5412 5413QualType 5414ASTContext::UsualArithmeticConversionsType(QualType lhs, QualType rhs) { 5415 // Perform the usual unary conversions. We do this early so that 5416 // integral promotions to "int" can allow us to exit early, in the 5417 // lhs == rhs check. Also, for conversion purposes, we ignore any 5418 // qualifiers. For example, "const float" and "float" are 5419 // equivalent. 5420 if (lhs->isPromotableIntegerType()) 5421 lhs = getPromotedIntegerType(lhs); 5422 else 5423 lhs = lhs.getUnqualifiedType(); 5424 if (rhs->isPromotableIntegerType()) 5425 rhs = getPromotedIntegerType(rhs); 5426 else 5427 rhs = rhs.getUnqualifiedType(); 5428 5429 // If both types are identical, no conversion is needed. 5430 if (lhs == rhs) 5431 return lhs; 5432 5433 // If either side is a non-arithmetic type (e.g. a pointer), we are done. 5434 // The caller can deal with this (e.g. pointer + int). 5435 if (!lhs->isArithmeticType() || !rhs->isArithmeticType()) 5436 return lhs; 5437 5438 // At this point, we have two different arithmetic types. 5439 5440 // Handle complex types first (C99 6.3.1.8p1). 5441 if (lhs->isComplexType() || rhs->isComplexType()) { 5442 // if we have an integer operand, the result is the complex type. 5443 if (rhs->isIntegerType() || rhs->isComplexIntegerType()) { 5444 // convert the rhs to the lhs complex type. 5445 return lhs; 5446 } 5447 if (lhs->isIntegerType() || lhs->isComplexIntegerType()) { 5448 // convert the lhs to the rhs complex type. 5449 return rhs; 5450 } 5451 // This handles complex/complex, complex/float, or float/complex. 5452 // When both operands are complex, the shorter operand is converted to the 5453 // type of the longer, and that is the type of the result. This corresponds 5454 // to what is done when combining two real floating-point operands. 5455 // The fun begins when size promotion occur across type domains. 5456 // From H&S 6.3.4: When one operand is complex and the other is a real 5457 // floating-point type, the less precise type is converted, within it's 5458 // real or complex domain, to the precision of the other type. For example, 5459 // when combining a "long double" with a "double _Complex", the 5460 // "double _Complex" is promoted to "long double _Complex". 5461 int result = getFloatingTypeOrder(lhs, rhs); 5462 5463 if (result > 0) { // The left side is bigger, convert rhs. 5464 rhs = getFloatingTypeOfSizeWithinDomain(lhs, rhs); 5465 } else if (result < 0) { // The right side is bigger, convert lhs. 5466 lhs = getFloatingTypeOfSizeWithinDomain(rhs, lhs); 5467 } 5468 // At this point, lhs and rhs have the same rank/size. Now, make sure the 5469 // domains match. This is a requirement for our implementation, C99 5470 // does not require this promotion. 5471 if (lhs != rhs) { // Domains don't match, we have complex/float mix. 5472 if (lhs->isRealFloatingType()) { // handle "double, _Complex double". 5473 return rhs; 5474 } else { // handle "_Complex double, double". 5475 return lhs; 5476 } 5477 } 5478 return lhs; // The domain/size match exactly. 5479 } 5480 // Now handle "real" floating types (i.e. float, double, long double). 5481 if (lhs->isRealFloatingType() || rhs->isRealFloatingType()) { 5482 // if we have an integer operand, the result is the real floating type. 5483 if (rhs->isIntegerType()) { 5484 // convert rhs to the lhs floating point type. 5485 return lhs; 5486 } 5487 if (rhs->isComplexIntegerType()) { 5488 // convert rhs to the complex floating point type. 5489 return getComplexType(lhs); 5490 } 5491 if (lhs->isIntegerType()) { 5492 // convert lhs to the rhs floating point type. 5493 return rhs; 5494 } 5495 if (lhs->isComplexIntegerType()) { 5496 // convert lhs to the complex floating point type. 5497 return getComplexType(rhs); 5498 } 5499 // We have two real floating types, float/complex combos were handled above. 5500 // Convert the smaller operand to the bigger result. 5501 int result = getFloatingTypeOrder(lhs, rhs); 5502 if (result > 0) // convert the rhs 5503 return lhs; 5504 assert(result < 0 && "illegal float comparison"); 5505 return rhs; // convert the lhs 5506 } 5507 if (lhs->isComplexIntegerType() || rhs->isComplexIntegerType()) { 5508 // Handle GCC complex int extension. 5509 const ComplexType *lhsComplexInt = lhs->getAsComplexIntegerType(); 5510 const ComplexType *rhsComplexInt = rhs->getAsComplexIntegerType(); 5511 5512 if (lhsComplexInt && rhsComplexInt) { 5513 if (getIntegerTypeOrder(lhsComplexInt->getElementType(), 5514 rhsComplexInt->getElementType()) >= 0) 5515 return lhs; // convert the rhs 5516 return rhs; 5517 } else if (lhsComplexInt && rhs->isIntegerType()) { 5518 // convert the rhs to the lhs complex type. 5519 return lhs; 5520 } else if (rhsComplexInt && lhs->isIntegerType()) { 5521 // convert the lhs to the rhs complex type. 5522 return rhs; 5523 } 5524 } 5525 // Finally, we have two differing integer types. 5526 // The rules for this case are in C99 6.3.1.8 5527 int compare = getIntegerTypeOrder(lhs, rhs); 5528 bool lhsSigned = lhs->hasSignedIntegerRepresentation(), 5529 rhsSigned = rhs->hasSignedIntegerRepresentation(); 5530 QualType destType; 5531 if (lhsSigned == rhsSigned) { 5532 // Same signedness; use the higher-ranked type 5533 destType = compare >= 0 ? lhs : rhs; 5534 } else if (compare != (lhsSigned ? 1 : -1)) { 5535 // The unsigned type has greater than or equal rank to the 5536 // signed type, so use the unsigned type 5537 destType = lhsSigned ? rhs : lhs; 5538 } else if (getIntWidth(lhs) != getIntWidth(rhs)) { 5539 // The two types are different widths; if we are here, that 5540 // means the signed type is larger than the unsigned type, so 5541 // use the signed type. 5542 destType = lhsSigned ? lhs : rhs; 5543 } else { 5544 // The signed type is higher-ranked than the unsigned type, 5545 // but isn't actually any bigger (like unsigned int and long 5546 // on most 32-bit systems). Use the unsigned type corresponding 5547 // to the signed type. 5548 destType = getCorrespondingUnsignedType(lhsSigned ? lhs : rhs); 5549 } 5550 return destType; 5551} 5552 5553GVALinkage ASTContext::GetGVALinkageForFunction(const FunctionDecl *FD) { 5554 GVALinkage External = GVA_StrongExternal; 5555 5556 Linkage L = FD->getLinkage(); 5557 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 5558 FD->getType()->getLinkage() == UniqueExternalLinkage) 5559 L = UniqueExternalLinkage; 5560 5561 switch (L) { 5562 case NoLinkage: 5563 case InternalLinkage: 5564 case UniqueExternalLinkage: 5565 return GVA_Internal; 5566 5567 case ExternalLinkage: 5568 switch (FD->getTemplateSpecializationKind()) { 5569 case TSK_Undeclared: 5570 case TSK_ExplicitSpecialization: 5571 External = GVA_StrongExternal; 5572 break; 5573 5574 case TSK_ExplicitInstantiationDefinition: 5575 return GVA_ExplicitTemplateInstantiation; 5576 5577 case TSK_ExplicitInstantiationDeclaration: 5578 case TSK_ImplicitInstantiation: 5579 External = GVA_TemplateInstantiation; 5580 break; 5581 } 5582 } 5583 5584 if (!FD->isInlined()) 5585 return External; 5586 5587 if (!getLangOptions().CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 5588 // GNU or C99 inline semantics. Determine whether this symbol should be 5589 // externally visible. 5590 if (FD->isInlineDefinitionExternallyVisible()) 5591 return External; 5592 5593 // C99 inline semantics, where the symbol is not externally visible. 5594 return GVA_C99Inline; 5595 } 5596 5597 // C++0x [temp.explicit]p9: 5598 // [ Note: The intent is that an inline function that is the subject of 5599 // an explicit instantiation declaration will still be implicitly 5600 // instantiated when used so that the body can be considered for 5601 // inlining, but that no out-of-line copy of the inline function would be 5602 // generated in the translation unit. -- end note ] 5603 if (FD->getTemplateSpecializationKind() 5604 == TSK_ExplicitInstantiationDeclaration) 5605 return GVA_C99Inline; 5606 5607 return GVA_CXXInline; 5608} 5609 5610GVALinkage ASTContext::GetGVALinkageForVariable(const VarDecl *VD) { 5611 // If this is a static data member, compute the kind of template 5612 // specialization. Otherwise, this variable is not part of a 5613 // template. 5614 TemplateSpecializationKind TSK = TSK_Undeclared; 5615 if (VD->isStaticDataMember()) 5616 TSK = VD->getTemplateSpecializationKind(); 5617 5618 Linkage L = VD->getLinkage(); 5619 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 5620 VD->getType()->getLinkage() == UniqueExternalLinkage) 5621 L = UniqueExternalLinkage; 5622 5623 switch (L) { 5624 case NoLinkage: 5625 case InternalLinkage: 5626 case UniqueExternalLinkage: 5627 return GVA_Internal; 5628 5629 case ExternalLinkage: 5630 switch (TSK) { 5631 case TSK_Undeclared: 5632 case TSK_ExplicitSpecialization: 5633 return GVA_StrongExternal; 5634 5635 case TSK_ExplicitInstantiationDeclaration: 5636 llvm_unreachable("Variable should not be instantiated"); 5637 // Fall through to treat this like any other instantiation. 5638 5639 case TSK_ExplicitInstantiationDefinition: 5640 return GVA_ExplicitTemplateInstantiation; 5641 5642 case TSK_ImplicitInstantiation: 5643 return GVA_TemplateInstantiation; 5644 } 5645 } 5646 5647 return GVA_StrongExternal; 5648} 5649 5650bool ASTContext::DeclMustBeEmitted(const Decl *D) { 5651 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 5652 if (!VD->isFileVarDecl()) 5653 return false; 5654 } else if (!isa<FunctionDecl>(D)) 5655 return false; 5656 5657 // Weak references don't produce any output by themselves. 5658 if (D->hasAttr<WeakRefAttr>()) 5659 return false; 5660 5661 // Aliases and used decls are required. 5662 if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>()) 5663 return true; 5664 5665 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 5666 // Forward declarations aren't required. 5667 if (!FD->isThisDeclarationADefinition()) 5668 return false; 5669 5670 // Constructors and destructors are required. 5671 if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>()) 5672 return true; 5673 5674 // The key function for a class is required. 5675 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 5676 const CXXRecordDecl *RD = MD->getParent(); 5677 if (MD->isOutOfLine() && RD->isDynamicClass()) { 5678 const CXXMethodDecl *KeyFunc = getKeyFunction(RD); 5679 if (KeyFunc && KeyFunc->getCanonicalDecl() == MD->getCanonicalDecl()) 5680 return true; 5681 } 5682 } 5683 5684 GVALinkage Linkage = GetGVALinkageForFunction(FD); 5685 5686 // static, static inline, always_inline, and extern inline functions can 5687 // always be deferred. Normal inline functions can be deferred in C99/C++. 5688 // Implicit template instantiations can also be deferred in C++. 5689 if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 5690 Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 5691 return false; 5692 return true; 5693 } 5694 5695 const VarDecl *VD = cast<VarDecl>(D); 5696 assert(VD->isFileVarDecl() && "Expected file scoped var"); 5697 5698 if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) 5699 return false; 5700 5701 // Structs that have non-trivial constructors or destructors are required. 5702 5703 // FIXME: Handle references. 5704 if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { 5705 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 5706 if (RD->hasDefinition() && 5707 (!RD->hasTrivialConstructor() || !RD->hasTrivialDestructor())) 5708 return true; 5709 } 5710 } 5711 5712 GVALinkage L = GetGVALinkageForVariable(VD); 5713 if (L == GVA_Internal || L == GVA_TemplateInstantiation) { 5714 if (!(VD->getInit() && VD->getInit()->HasSideEffects(*this))) 5715 return false; 5716 } 5717 5718 return true; 5719} 5720 5721CXXABI::~CXXABI() {} 5722