ASTContext.cpp revision 37ffed3b7f229844cae2463ff82b527506c86c74
1//===--- ASTContext.cpp - Context to hold long-lived AST nodes ------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements the ASTContext interface. 11// 12//===----------------------------------------------------------------------===// 13 14#include "clang/AST/ASTContext.h" 15#include "clang/AST/CharUnits.h" 16#include "clang/AST/DeclCXX.h" 17#include "clang/AST/DeclObjC.h" 18#include "clang/AST/DeclTemplate.h" 19#include "clang/AST/TypeLoc.h" 20#include "clang/AST/Expr.h" 21#include "clang/AST/ExprCXX.h" 22#include "clang/AST/ExternalASTSource.h" 23#include "clang/AST/RecordLayout.h" 24#include "clang/Basic/Builtins.h" 25#include "clang/Basic/SourceManager.h" 26#include "clang/Basic/TargetInfo.h" 27#include "llvm/ADT/SmallString.h" 28#include "llvm/ADT/StringExtras.h" 29#include "llvm/Support/MathExtras.h" 30#include "llvm/Support/raw_ostream.h" 31 32using namespace clang; 33 34enum FloatingRank { 35 FloatRank, DoubleRank, LongDoubleRank 36}; 37 38void 39ASTContext::CanonicalTemplateTemplateParm::Profile(llvm::FoldingSetNodeID &ID, 40 TemplateTemplateParmDecl *Parm) { 41 ID.AddInteger(Parm->getDepth()); 42 ID.AddInteger(Parm->getPosition()); 43 // FIXME: Parameter pack 44 45 TemplateParameterList *Params = Parm->getTemplateParameters(); 46 ID.AddInteger(Params->size()); 47 for (TemplateParameterList::const_iterator P = Params->begin(), 48 PEnd = Params->end(); 49 P != PEnd; ++P) { 50 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) { 51 ID.AddInteger(0); 52 ID.AddBoolean(TTP->isParameterPack()); 53 continue; 54 } 55 56 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 57 ID.AddInteger(1); 58 // FIXME: Parameter pack 59 ID.AddPointer(NTTP->getType().getAsOpaquePtr()); 60 continue; 61 } 62 63 TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P); 64 ID.AddInteger(2); 65 Profile(ID, TTP); 66 } 67} 68 69TemplateTemplateParmDecl * 70ASTContext::getCanonicalTemplateTemplateParmDecl( 71 TemplateTemplateParmDecl *TTP) { 72 // Check if we already have a canonical template template parameter. 73 llvm::FoldingSetNodeID ID; 74 CanonicalTemplateTemplateParm::Profile(ID, TTP); 75 void *InsertPos = 0; 76 CanonicalTemplateTemplateParm *Canonical 77 = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 78 if (Canonical) 79 return Canonical->getParam(); 80 81 // Build a canonical template parameter list. 82 TemplateParameterList *Params = TTP->getTemplateParameters(); 83 llvm::SmallVector<NamedDecl *, 4> CanonParams; 84 CanonParams.reserve(Params->size()); 85 for (TemplateParameterList::const_iterator P = Params->begin(), 86 PEnd = Params->end(); 87 P != PEnd; ++P) { 88 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) 89 CanonParams.push_back( 90 TemplateTypeParmDecl::Create(*this, getTranslationUnitDecl(), 91 SourceLocation(), TTP->getDepth(), 92 TTP->getIndex(), 0, false, 93 TTP->isParameterPack())); 94 else if (NonTypeTemplateParmDecl *NTTP 95 = dyn_cast<NonTypeTemplateParmDecl>(*P)) 96 CanonParams.push_back( 97 NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 98 SourceLocation(), NTTP->getDepth(), 99 NTTP->getPosition(), 0, 100 getCanonicalType(NTTP->getType()), 101 0)); 102 else 103 CanonParams.push_back(getCanonicalTemplateTemplateParmDecl( 104 cast<TemplateTemplateParmDecl>(*P))); 105 } 106 107 TemplateTemplateParmDecl *CanonTTP 108 = TemplateTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 109 SourceLocation(), TTP->getDepth(), 110 TTP->getPosition(), 0, 111 TemplateParameterList::Create(*this, SourceLocation(), 112 SourceLocation(), 113 CanonParams.data(), 114 CanonParams.size(), 115 SourceLocation())); 116 117 // Get the new insert position for the node we care about. 118 Canonical = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 119 assert(Canonical == 0 && "Shouldn't be in the map!"); 120 (void)Canonical; 121 122 // Create the canonical template template parameter entry. 123 Canonical = new (*this) CanonicalTemplateTemplateParm(CanonTTP); 124 CanonTemplateTemplateParms.InsertNode(Canonical, InsertPos); 125 return CanonTTP; 126} 127 128ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 129 const TargetInfo &t, 130 IdentifierTable &idents, SelectorTable &sels, 131 Builtin::Context &builtins, 132 bool FreeMem, unsigned size_reserve) : 133 TemplateSpecializationTypes(this_()), 134 DependentTemplateSpecializationTypes(this_()), 135 GlobalNestedNameSpecifier(0), CFConstantStringTypeDecl(0), 136 NSConstantStringTypeDecl(0), 137 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 138 sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 139 NullTypeSourceInfo(QualType()), 140 SourceMgr(SM), LangOpts(LOpts), FreeMemory(FreeMem), Target(t), 141 Idents(idents), Selectors(sels), 142 BuiltinInfo(builtins), 143 DeclarationNames(*this), 144 ExternalSource(0), PrintingPolicy(LOpts), 145 LastSDM(0, 0), 146 UniqueBlockByRefTypeID(0), UniqueBlockParmTypeID(0) { 147 ObjCIdRedefinitionType = QualType(); 148 ObjCClassRedefinitionType = QualType(); 149 ObjCSelRedefinitionType = QualType(); 150 if (size_reserve > 0) Types.reserve(size_reserve); 151 TUDecl = TranslationUnitDecl::Create(*this); 152 InitBuiltinTypes(); 153} 154 155ASTContext::~ASTContext() { 156 // Release the DenseMaps associated with DeclContext objects. 157 // FIXME: Is this the ideal solution? 158 ReleaseDeclContextMaps(); 159 160 if (!FreeMemory) { 161 // Call all of the deallocation functions. 162 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 163 Deallocations[I].first(Deallocations[I].second); 164 } 165 166 // Release all of the memory associated with overridden C++ methods. 167 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 168 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 169 OM != OMEnd; ++OM) 170 OM->second.Destroy(); 171 172 if (FreeMemory) { 173 // Deallocate all the types. 174 while (!Types.empty()) { 175 Types.back()->Destroy(*this); 176 Types.pop_back(); 177 } 178 179 for (llvm::FoldingSet<ExtQuals>::iterator 180 I = ExtQualNodes.begin(), E = ExtQualNodes.end(); I != E; ) { 181 // Increment in loop to prevent using deallocated memory. 182 Deallocate(&*I++); 183 } 184 185 for (llvm::DenseMap<const ObjCContainerDecl*, 186 const ASTRecordLayout*>::iterator 187 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) { 188 // Increment in loop to prevent using deallocated memory. 189 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 190 R->Destroy(*this); 191 } 192 } 193 194 // ASTRecordLayout objects in ASTRecordLayouts must always be destroyed 195 // even when using the BumpPtrAllocator because they can contain 196 // DenseMaps. 197 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 198 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 199 // Increment in loop to prevent using deallocated memory. 200 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 201 R->Destroy(*this); 202 } 203 204 // Destroy nested-name-specifiers. 205 for (llvm::FoldingSet<NestedNameSpecifier>::iterator 206 NNS = NestedNameSpecifiers.begin(), 207 NNSEnd = NestedNameSpecifiers.end(); 208 NNS != NNSEnd; ) { 209 // Increment in loop to prevent using deallocated memory. 210 (*NNS++).Destroy(*this); 211 } 212 213 if (GlobalNestedNameSpecifier) 214 GlobalNestedNameSpecifier->Destroy(*this); 215 216 TUDecl->Destroy(*this); 217} 218 219void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 220 Deallocations.push_back(std::make_pair(Callback, Data)); 221} 222 223void 224ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 225 ExternalSource.reset(Source.take()); 226} 227 228void ASTContext::PrintStats() const { 229 fprintf(stderr, "*** AST Context Stats:\n"); 230 fprintf(stderr, " %d types total.\n", (int)Types.size()); 231 232 unsigned counts[] = { 233#define TYPE(Name, Parent) 0, 234#define ABSTRACT_TYPE(Name, Parent) 235#include "clang/AST/TypeNodes.def" 236 0 // Extra 237 }; 238 239 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 240 Type *T = Types[i]; 241 counts[(unsigned)T->getTypeClass()]++; 242 } 243 244 unsigned Idx = 0; 245 unsigned TotalBytes = 0; 246#define TYPE(Name, Parent) \ 247 if (counts[Idx]) \ 248 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 249 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 250 ++Idx; 251#define ABSTRACT_TYPE(Name, Parent) 252#include "clang/AST/TypeNodes.def" 253 254 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 255 256 if (ExternalSource.get()) { 257 fprintf(stderr, "\n"); 258 ExternalSource->PrintStats(); 259 } 260} 261 262 263void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 264 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 265 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 266 Types.push_back(Ty); 267} 268 269void ASTContext::InitBuiltinTypes() { 270 assert(VoidTy.isNull() && "Context reinitialized?"); 271 272 // C99 6.2.5p19. 273 InitBuiltinType(VoidTy, BuiltinType::Void); 274 275 // C99 6.2.5p2. 276 InitBuiltinType(BoolTy, BuiltinType::Bool); 277 // C99 6.2.5p3. 278 if (LangOpts.CharIsSigned) 279 InitBuiltinType(CharTy, BuiltinType::Char_S); 280 else 281 InitBuiltinType(CharTy, BuiltinType::Char_U); 282 // C99 6.2.5p4. 283 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 284 InitBuiltinType(ShortTy, BuiltinType::Short); 285 InitBuiltinType(IntTy, BuiltinType::Int); 286 InitBuiltinType(LongTy, BuiltinType::Long); 287 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 288 289 // C99 6.2.5p6. 290 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 291 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 292 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 293 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 294 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 295 296 // C99 6.2.5p10. 297 InitBuiltinType(FloatTy, BuiltinType::Float); 298 InitBuiltinType(DoubleTy, BuiltinType::Double); 299 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 300 301 // GNU extension, 128-bit integers. 302 InitBuiltinType(Int128Ty, BuiltinType::Int128); 303 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 304 305 if (LangOpts.CPlusPlus) // C++ 3.9.1p5 306 InitBuiltinType(WCharTy, BuiltinType::WChar); 307 else // C99 308 WCharTy = getFromTargetType(Target.getWCharType()); 309 310 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 311 InitBuiltinType(Char16Ty, BuiltinType::Char16); 312 else // C99 313 Char16Ty = getFromTargetType(Target.getChar16Type()); 314 315 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 316 InitBuiltinType(Char32Ty, BuiltinType::Char32); 317 else // C99 318 Char32Ty = getFromTargetType(Target.getChar32Type()); 319 320 // Placeholder type for functions. 321 InitBuiltinType(OverloadTy, BuiltinType::Overload); 322 323 // Placeholder type for type-dependent expressions whose type is 324 // completely unknown. No code should ever check a type against 325 // DependentTy and users should never see it; however, it is here to 326 // help diagnose failures to properly check for type-dependent 327 // expressions. 328 InitBuiltinType(DependentTy, BuiltinType::Dependent); 329 330 // Placeholder type for C++0x auto declarations whose real type has 331 // not yet been deduced. 332 InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 333 334 // C99 6.2.5p11. 335 FloatComplexTy = getComplexType(FloatTy); 336 DoubleComplexTy = getComplexType(DoubleTy); 337 LongDoubleComplexTy = getComplexType(LongDoubleTy); 338 339 BuiltinVaListType = QualType(); 340 341 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 342 ObjCIdTypedefType = QualType(); 343 ObjCClassTypedefType = QualType(); 344 ObjCSelTypedefType = QualType(); 345 346 // Builtin types for 'id', 'Class', and 'SEL'. 347 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 348 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 349 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 350 351 ObjCConstantStringType = QualType(); 352 353 // void * type 354 VoidPtrTy = getPointerType(VoidTy); 355 356 // nullptr type (C++0x 2.14.7) 357 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 358} 359 360MemberSpecializationInfo * 361ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 362 assert(Var->isStaticDataMember() && "Not a static data member"); 363 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 364 = InstantiatedFromStaticDataMember.find(Var); 365 if (Pos == InstantiatedFromStaticDataMember.end()) 366 return 0; 367 368 return Pos->second; 369} 370 371void 372ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 373 TemplateSpecializationKind TSK) { 374 assert(Inst->isStaticDataMember() && "Not a static data member"); 375 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 376 assert(!InstantiatedFromStaticDataMember[Inst] && 377 "Already noted what static data member was instantiated from"); 378 InstantiatedFromStaticDataMember[Inst] 379 = new (*this) MemberSpecializationInfo(Tmpl, TSK); 380} 381 382NamedDecl * 383ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 384 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 385 = InstantiatedFromUsingDecl.find(UUD); 386 if (Pos == InstantiatedFromUsingDecl.end()) 387 return 0; 388 389 return Pos->second; 390} 391 392void 393ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 394 assert((isa<UsingDecl>(Pattern) || 395 isa<UnresolvedUsingValueDecl>(Pattern) || 396 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 397 "pattern decl is not a using decl"); 398 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 399 InstantiatedFromUsingDecl[Inst] = Pattern; 400} 401 402UsingShadowDecl * 403ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 404 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 405 = InstantiatedFromUsingShadowDecl.find(Inst); 406 if (Pos == InstantiatedFromUsingShadowDecl.end()) 407 return 0; 408 409 return Pos->second; 410} 411 412void 413ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 414 UsingShadowDecl *Pattern) { 415 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 416 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 417} 418 419FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 420 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 421 = InstantiatedFromUnnamedFieldDecl.find(Field); 422 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 423 return 0; 424 425 return Pos->second; 426} 427 428void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 429 FieldDecl *Tmpl) { 430 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 431 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 432 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 433 "Already noted what unnamed field was instantiated from"); 434 435 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 436} 437 438ASTContext::overridden_cxx_method_iterator 439ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 440 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 441 = OverriddenMethods.find(Method); 442 if (Pos == OverriddenMethods.end()) 443 return 0; 444 445 return Pos->second.begin(); 446} 447 448ASTContext::overridden_cxx_method_iterator 449ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 450 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 451 = OverriddenMethods.find(Method); 452 if (Pos == OverriddenMethods.end()) 453 return 0; 454 455 return Pos->second.end(); 456} 457 458void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 459 const CXXMethodDecl *Overridden) { 460 OverriddenMethods[Method].push_back(Overridden); 461} 462 463namespace { 464 class BeforeInTranslationUnit 465 : std::binary_function<SourceRange, SourceRange, bool> { 466 SourceManager *SourceMgr; 467 468 public: 469 explicit BeforeInTranslationUnit(SourceManager *SM) : SourceMgr(SM) { } 470 471 bool operator()(SourceRange X, SourceRange Y) { 472 return SourceMgr->isBeforeInTranslationUnit(X.getBegin(), Y.getBegin()); 473 } 474 }; 475} 476 477//===----------------------------------------------------------------------===// 478// Type Sizing and Analysis 479//===----------------------------------------------------------------------===// 480 481/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 482/// scalar floating point type. 483const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 484 const BuiltinType *BT = T->getAs<BuiltinType>(); 485 assert(BT && "Not a floating point type!"); 486 switch (BT->getKind()) { 487 default: assert(0 && "Not a floating point type!"); 488 case BuiltinType::Float: return Target.getFloatFormat(); 489 case BuiltinType::Double: return Target.getDoubleFormat(); 490 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 491 } 492} 493 494/// getDeclAlign - Return a conservative estimate of the alignment of the 495/// specified decl. Note that bitfields do not have a valid alignment, so 496/// this method will assert on them. 497/// If @p RefAsPointee, references are treated like their underlying type 498/// (for alignof), else they're treated like pointers (for CodeGen). 499CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) { 500 unsigned Align = Target.getCharWidth(); 501 502 if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 503 Align = std::max(Align, AA->getMaxAlignment()); 504 505 if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 506 QualType T = VD->getType(); 507 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 508 if (RefAsPointee) 509 T = RT->getPointeeType(); 510 else 511 T = getPointerType(RT->getPointeeType()); 512 } 513 if (!T->isIncompleteType() && !T->isFunctionType()) { 514 unsigned MinWidth = Target.getLargeArrayMinWidth(); 515 unsigned ArrayAlign = Target.getLargeArrayAlign(); 516 if (isa<VariableArrayType>(T) && MinWidth != 0) 517 Align = std::max(Align, ArrayAlign); 518 if (ConstantArrayType *CT = dyn_cast<ConstantArrayType>(T)) { 519 unsigned Size = getTypeSize(CT); 520 if (MinWidth != 0 && MinWidth <= Size) 521 Align = std::max(Align, ArrayAlign); 522 } 523 // Incomplete or function types default to 1. 524 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 525 T = cast<ArrayType>(T)->getElementType(); 526 527 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 528 } 529 if (const FieldDecl *FD = dyn_cast<FieldDecl>(VD)) { 530 // In the case of a field in a packed struct, we want the minimum 531 // of the alignment of the field and the alignment of the struct. 532 Align = std::min(Align, 533 getPreferredTypeAlign(FD->getParent()->getTypeForDecl())); 534 } 535 } 536 537 return CharUnits::fromQuantity(Align / Target.getCharWidth()); 538} 539 540std::pair<CharUnits, CharUnits> 541ASTContext::getTypeInfoInChars(const Type *T) { 542 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 543 return std::make_pair(CharUnits::fromQuantity(Info.first / getCharWidth()), 544 CharUnits::fromQuantity(Info.second / getCharWidth())); 545} 546 547std::pair<CharUnits, CharUnits> 548ASTContext::getTypeInfoInChars(QualType T) { 549 return getTypeInfoInChars(T.getTypePtr()); 550} 551 552/// getTypeSize - Return the size of the specified type, in bits. This method 553/// does not work on incomplete types. 554/// 555/// FIXME: Pointers into different addr spaces could have different sizes and 556/// alignment requirements: getPointerInfo should take an AddrSpace, this 557/// should take a QualType, &c. 558std::pair<uint64_t, unsigned> 559ASTContext::getTypeInfo(const Type *T) { 560 uint64_t Width=0; 561 unsigned Align=8; 562 switch (T->getTypeClass()) { 563#define TYPE(Class, Base) 564#define ABSTRACT_TYPE(Class, Base) 565#define NON_CANONICAL_TYPE(Class, Base) 566#define DEPENDENT_TYPE(Class, Base) case Type::Class: 567#include "clang/AST/TypeNodes.def" 568 assert(false && "Should not see dependent types"); 569 break; 570 571 case Type::FunctionNoProto: 572 case Type::FunctionProto: 573 // GCC extension: alignof(function) = 32 bits 574 Width = 0; 575 Align = 32; 576 break; 577 578 case Type::IncompleteArray: 579 case Type::VariableArray: 580 Width = 0; 581 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 582 break; 583 584 case Type::ConstantArray: { 585 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 586 587 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 588 Width = EltInfo.first*CAT->getSize().getZExtValue(); 589 Align = EltInfo.second; 590 break; 591 } 592 case Type::ExtVector: 593 case Type::Vector: { 594 const VectorType *VT = cast<VectorType>(T); 595 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 596 Width = EltInfo.first*VT->getNumElements(); 597 Align = Width; 598 // If the alignment is not a power of 2, round up to the next power of 2. 599 // This happens for non-power-of-2 length vectors. 600 if (Align & (Align-1)) { 601 Align = llvm::NextPowerOf2(Align); 602 Width = llvm::RoundUpToAlignment(Width, Align); 603 } 604 break; 605 } 606 607 case Type::Builtin: 608 switch (cast<BuiltinType>(T)->getKind()) { 609 default: assert(0 && "Unknown builtin type!"); 610 case BuiltinType::Void: 611 // GCC extension: alignof(void) = 8 bits. 612 Width = 0; 613 Align = 8; 614 break; 615 616 case BuiltinType::Bool: 617 Width = Target.getBoolWidth(); 618 Align = Target.getBoolAlign(); 619 break; 620 case BuiltinType::Char_S: 621 case BuiltinType::Char_U: 622 case BuiltinType::UChar: 623 case BuiltinType::SChar: 624 Width = Target.getCharWidth(); 625 Align = Target.getCharAlign(); 626 break; 627 case BuiltinType::WChar: 628 Width = Target.getWCharWidth(); 629 Align = Target.getWCharAlign(); 630 break; 631 case BuiltinType::Char16: 632 Width = Target.getChar16Width(); 633 Align = Target.getChar16Align(); 634 break; 635 case BuiltinType::Char32: 636 Width = Target.getChar32Width(); 637 Align = Target.getChar32Align(); 638 break; 639 case BuiltinType::UShort: 640 case BuiltinType::Short: 641 Width = Target.getShortWidth(); 642 Align = Target.getShortAlign(); 643 break; 644 case BuiltinType::UInt: 645 case BuiltinType::Int: 646 Width = Target.getIntWidth(); 647 Align = Target.getIntAlign(); 648 break; 649 case BuiltinType::ULong: 650 case BuiltinType::Long: 651 Width = Target.getLongWidth(); 652 Align = Target.getLongAlign(); 653 break; 654 case BuiltinType::ULongLong: 655 case BuiltinType::LongLong: 656 Width = Target.getLongLongWidth(); 657 Align = Target.getLongLongAlign(); 658 break; 659 case BuiltinType::Int128: 660 case BuiltinType::UInt128: 661 Width = 128; 662 Align = 128; // int128_t is 128-bit aligned on all targets. 663 break; 664 case BuiltinType::Float: 665 Width = Target.getFloatWidth(); 666 Align = Target.getFloatAlign(); 667 break; 668 case BuiltinType::Double: 669 Width = Target.getDoubleWidth(); 670 Align = Target.getDoubleAlign(); 671 break; 672 case BuiltinType::LongDouble: 673 Width = Target.getLongDoubleWidth(); 674 Align = Target.getLongDoubleAlign(); 675 break; 676 case BuiltinType::NullPtr: 677 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 678 Align = Target.getPointerAlign(0); // == sizeof(void*) 679 break; 680 } 681 break; 682 case Type::ObjCObjectPointer: 683 Width = Target.getPointerWidth(0); 684 Align = Target.getPointerAlign(0); 685 break; 686 case Type::BlockPointer: { 687 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 688 Width = Target.getPointerWidth(AS); 689 Align = Target.getPointerAlign(AS); 690 break; 691 } 692 case Type::LValueReference: 693 case Type::RValueReference: { 694 // alignof and sizeof should never enter this code path here, so we go 695 // the pointer route. 696 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 697 Width = Target.getPointerWidth(AS); 698 Align = Target.getPointerAlign(AS); 699 break; 700 } 701 case Type::Pointer: { 702 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 703 Width = Target.getPointerWidth(AS); 704 Align = Target.getPointerAlign(AS); 705 break; 706 } 707 case Type::MemberPointer: { 708 QualType Pointee = cast<MemberPointerType>(T)->getPointeeType(); 709 std::pair<uint64_t, unsigned> PtrDiffInfo = 710 getTypeInfo(getPointerDiffType()); 711 Width = PtrDiffInfo.first; 712 if (Pointee->isFunctionType()) 713 Width *= 2; 714 Align = PtrDiffInfo.second; 715 break; 716 } 717 case Type::Complex: { 718 // Complex types have the same alignment as their elements, but twice the 719 // size. 720 std::pair<uint64_t, unsigned> EltInfo = 721 getTypeInfo(cast<ComplexType>(T)->getElementType()); 722 Width = EltInfo.first*2; 723 Align = EltInfo.second; 724 break; 725 } 726 case Type::ObjCObject: 727 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 728 case Type::ObjCInterface: { 729 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 730 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 731 Width = Layout.getSize(); 732 Align = Layout.getAlignment(); 733 break; 734 } 735 case Type::Record: 736 case Type::Enum: { 737 const TagType *TT = cast<TagType>(T); 738 739 if (TT->getDecl()->isInvalidDecl()) { 740 Width = 1; 741 Align = 1; 742 break; 743 } 744 745 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 746 return getTypeInfo(ET->getDecl()->getIntegerType()); 747 748 const RecordType *RT = cast<RecordType>(TT); 749 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 750 Width = Layout.getSize(); 751 Align = Layout.getAlignment(); 752 break; 753 } 754 755 case Type::SubstTemplateTypeParm: 756 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 757 getReplacementType().getTypePtr()); 758 759 case Type::Typedef: { 760 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 761 if (const AlignedAttr *Aligned = Typedef->getAttr<AlignedAttr>()) { 762 Align = std::max(Aligned->getMaxAlignment(), 763 getTypeAlign(Typedef->getUnderlyingType().getTypePtr())); 764 Width = getTypeSize(Typedef->getUnderlyingType().getTypePtr()); 765 } else 766 return getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 767 break; 768 } 769 770 case Type::TypeOfExpr: 771 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 772 .getTypePtr()); 773 774 case Type::TypeOf: 775 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 776 777 case Type::Decltype: 778 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 779 .getTypePtr()); 780 781 case Type::Elaborated: 782 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 783 784 case Type::TemplateSpecialization: 785 assert(getCanonicalType(T) != T && 786 "Cannot request the size of a dependent type"); 787 // FIXME: this is likely to be wrong once we support template 788 // aliases, since a template alias could refer to a typedef that 789 // has an __aligned__ attribute on it. 790 return getTypeInfo(getCanonicalType(T)); 791 } 792 793 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 794 return std::make_pair(Width, Align); 795} 796 797/// getTypeSizeInChars - Return the size of the specified type, in characters. 798/// This method does not work on incomplete types. 799CharUnits ASTContext::getTypeSizeInChars(QualType T) { 800 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 801} 802CharUnits ASTContext::getTypeSizeInChars(const Type *T) { 803 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 804} 805 806/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 807/// characters. This method does not work on incomplete types. 808CharUnits ASTContext::getTypeAlignInChars(QualType T) { 809 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 810} 811CharUnits ASTContext::getTypeAlignInChars(const Type *T) { 812 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 813} 814 815/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 816/// type for the current target in bits. This can be different than the ABI 817/// alignment in cases where it is beneficial for performance to overalign 818/// a data type. 819unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 820 unsigned ABIAlign = getTypeAlign(T); 821 822 // Double and long long should be naturally aligned if possible. 823 if (const ComplexType* CT = T->getAs<ComplexType>()) 824 T = CT->getElementType().getTypePtr(); 825 if (T->isSpecificBuiltinType(BuiltinType::Double) || 826 T->isSpecificBuiltinType(BuiltinType::LongLong)) 827 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 828 829 return ABIAlign; 830} 831 832static void CollectLocalObjCIvars(ASTContext *Ctx, 833 const ObjCInterfaceDecl *OI, 834 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 835 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 836 E = OI->ivar_end(); I != E; ++I) { 837 ObjCIvarDecl *IVDecl = *I; 838 if (!IVDecl->isInvalidDecl()) 839 Fields.push_back(cast<FieldDecl>(IVDecl)); 840 } 841} 842 843void ASTContext::CollectObjCIvars(const ObjCInterfaceDecl *OI, 844 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 845 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 846 CollectObjCIvars(SuperClass, Fields); 847 CollectLocalObjCIvars(this, OI, Fields); 848} 849 850/// ShallowCollectObjCIvars - 851/// Collect all ivars, including those synthesized, in the current class. 852/// 853void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 854 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 855 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 856 E = OI->ivar_end(); I != E; ++I) { 857 Ivars.push_back(*I); 858 } 859 860 CollectNonClassIvars(OI, Ivars); 861} 862 863/// CollectNonClassIvars - 864/// This routine collects all other ivars which are not declared in the class. 865/// This includes synthesized ivars (via @synthesize) and those in 866// class's @implementation. 867/// 868void ASTContext::CollectNonClassIvars(const ObjCInterfaceDecl *OI, 869 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 870 // Find ivars declared in class extension. 871 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl; 872 CDecl = CDecl->getNextClassExtension()) { 873 for (ObjCCategoryDecl::ivar_iterator I = CDecl->ivar_begin(), 874 E = CDecl->ivar_end(); I != E; ++I) { 875 Ivars.push_back(*I); 876 } 877 } 878 879 // Also add any ivar defined in this class's implementation. This 880 // includes synthesized ivars. 881 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) { 882 for (ObjCImplementationDecl::ivar_iterator I = ImplDecl->ivar_begin(), 883 E = ImplDecl->ivar_end(); I != E; ++I) 884 Ivars.push_back(*I); 885 } 886} 887 888/// CollectInheritedProtocols - Collect all protocols in current class and 889/// those inherited by it. 890void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 891 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 892 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 893 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 894 PE = OI->protocol_end(); P != PE; ++P) { 895 ObjCProtocolDecl *Proto = (*P); 896 Protocols.insert(Proto); 897 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 898 PE = Proto->protocol_end(); P != PE; ++P) { 899 Protocols.insert(*P); 900 CollectInheritedProtocols(*P, Protocols); 901 } 902 } 903 904 // Categories of this Interface. 905 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 906 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 907 CollectInheritedProtocols(CDeclChain, Protocols); 908 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 909 while (SD) { 910 CollectInheritedProtocols(SD, Protocols); 911 SD = SD->getSuperClass(); 912 } 913 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 914 for (ObjCInterfaceDecl::protocol_iterator P = OC->protocol_begin(), 915 PE = OC->protocol_end(); P != PE; ++P) { 916 ObjCProtocolDecl *Proto = (*P); 917 Protocols.insert(Proto); 918 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 919 PE = Proto->protocol_end(); P != PE; ++P) 920 CollectInheritedProtocols(*P, Protocols); 921 } 922 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 923 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 924 PE = OP->protocol_end(); P != PE; ++P) { 925 ObjCProtocolDecl *Proto = (*P); 926 Protocols.insert(Proto); 927 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 928 PE = Proto->protocol_end(); P != PE; ++P) 929 CollectInheritedProtocols(*P, Protocols); 930 } 931 } 932} 933 934unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) { 935 unsigned count = 0; 936 // Count ivars declared in class extension. 937 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl; 938 CDecl = CDecl->getNextClassExtension()) 939 count += CDecl->ivar_size(); 940 941 // Count ivar defined in this class's implementation. This 942 // includes synthesized ivars. 943 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 944 count += ImplDecl->ivar_size(); 945 946 return count; 947} 948 949/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 950ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 951 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 952 I = ObjCImpls.find(D); 953 if (I != ObjCImpls.end()) 954 return cast<ObjCImplementationDecl>(I->second); 955 return 0; 956} 957/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 958ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 959 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 960 I = ObjCImpls.find(D); 961 if (I != ObjCImpls.end()) 962 return cast<ObjCCategoryImplDecl>(I->second); 963 return 0; 964} 965 966/// \brief Set the implementation of ObjCInterfaceDecl. 967void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 968 ObjCImplementationDecl *ImplD) { 969 assert(IFaceD && ImplD && "Passed null params"); 970 ObjCImpls[IFaceD] = ImplD; 971} 972/// \brief Set the implementation of ObjCCategoryDecl. 973void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 974 ObjCCategoryImplDecl *ImplD) { 975 assert(CatD && ImplD && "Passed null params"); 976 ObjCImpls[CatD] = ImplD; 977} 978 979/// \brief Allocate an uninitialized TypeSourceInfo. 980/// 981/// The caller should initialize the memory held by TypeSourceInfo using 982/// the TypeLoc wrappers. 983/// 984/// \param T the type that will be the basis for type source info. This type 985/// should refer to how the declarator was written in source code, not to 986/// what type semantic analysis resolved the declarator to. 987TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 988 unsigned DataSize) { 989 if (!DataSize) 990 DataSize = TypeLoc::getFullDataSizeForType(T); 991 else 992 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 993 "incorrect data size provided to CreateTypeSourceInfo!"); 994 995 TypeSourceInfo *TInfo = 996 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 997 new (TInfo) TypeSourceInfo(T); 998 return TInfo; 999} 1000 1001TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1002 SourceLocation L) { 1003 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1004 DI->getTypeLoc().initialize(L); 1005 return DI; 1006} 1007 1008const ASTRecordLayout & 1009ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 1010 return getObjCLayout(D, 0); 1011} 1012 1013const ASTRecordLayout & 1014ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 1015 return getObjCLayout(D->getClassInterface(), D); 1016} 1017 1018//===----------------------------------------------------------------------===// 1019// Type creation/memoization methods 1020//===----------------------------------------------------------------------===// 1021 1022QualType ASTContext::getExtQualType(const Type *TypeNode, Qualifiers Quals) { 1023 unsigned Fast = Quals.getFastQualifiers(); 1024 Quals.removeFastQualifiers(); 1025 1026 // Check if we've already instantiated this type. 1027 llvm::FoldingSetNodeID ID; 1028 ExtQuals::Profile(ID, TypeNode, Quals); 1029 void *InsertPos = 0; 1030 if (ExtQuals *EQ = ExtQualNodes.FindNodeOrInsertPos(ID, InsertPos)) { 1031 assert(EQ->getQualifiers() == Quals); 1032 QualType T = QualType(EQ, Fast); 1033 return T; 1034 } 1035 1036 ExtQuals *New = new (*this, TypeAlignment) ExtQuals(*this, TypeNode, Quals); 1037 ExtQualNodes.InsertNode(New, InsertPos); 1038 QualType T = QualType(New, Fast); 1039 return T; 1040} 1041 1042QualType ASTContext::getVolatileType(QualType T) { 1043 QualType CanT = getCanonicalType(T); 1044 if (CanT.isVolatileQualified()) return T; 1045 1046 QualifierCollector Quals; 1047 const Type *TypeNode = Quals.strip(T); 1048 Quals.addVolatile(); 1049 1050 return getExtQualType(TypeNode, Quals); 1051} 1052 1053QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 1054 QualType CanT = getCanonicalType(T); 1055 if (CanT.getAddressSpace() == AddressSpace) 1056 return T; 1057 1058 // If we are composing extended qualifiers together, merge together 1059 // into one ExtQuals node. 1060 QualifierCollector Quals; 1061 const Type *TypeNode = Quals.strip(T); 1062 1063 // If this type already has an address space specified, it cannot get 1064 // another one. 1065 assert(!Quals.hasAddressSpace() && 1066 "Type cannot be in multiple addr spaces!"); 1067 Quals.addAddressSpace(AddressSpace); 1068 1069 return getExtQualType(TypeNode, Quals); 1070} 1071 1072QualType ASTContext::getObjCGCQualType(QualType T, 1073 Qualifiers::GC GCAttr) { 1074 QualType CanT = getCanonicalType(T); 1075 if (CanT.getObjCGCAttr() == GCAttr) 1076 return T; 1077 1078 if (T->isPointerType()) { 1079 QualType Pointee = T->getAs<PointerType>()->getPointeeType(); 1080 if (Pointee->isAnyPointerType()) { 1081 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1082 return getPointerType(ResultType); 1083 } 1084 } 1085 1086 // If we are composing extended qualifiers together, merge together 1087 // into one ExtQuals node. 1088 QualifierCollector Quals; 1089 const Type *TypeNode = Quals.strip(T); 1090 1091 // If this type already has an ObjCGC specified, it cannot get 1092 // another one. 1093 assert(!Quals.hasObjCGCAttr() && 1094 "Type cannot have multiple ObjCGCs!"); 1095 Quals.addObjCGCAttr(GCAttr); 1096 1097 return getExtQualType(TypeNode, Quals); 1098} 1099 1100static QualType getExtFunctionType(ASTContext& Context, QualType T, 1101 const FunctionType::ExtInfo &Info) { 1102 QualType ResultType; 1103 if (const PointerType *Pointer = T->getAs<PointerType>()) { 1104 QualType Pointee = Pointer->getPointeeType(); 1105 ResultType = getExtFunctionType(Context, Pointee, Info); 1106 if (ResultType == Pointee) 1107 return T; 1108 1109 ResultType = Context.getPointerType(ResultType); 1110 } else if (const BlockPointerType *BlockPointer 1111 = T->getAs<BlockPointerType>()) { 1112 QualType Pointee = BlockPointer->getPointeeType(); 1113 ResultType = getExtFunctionType(Context, Pointee, Info); 1114 if (ResultType == Pointee) 1115 return T; 1116 1117 ResultType = Context.getBlockPointerType(ResultType); 1118 } else if (const FunctionType *F = T->getAs<FunctionType>()) { 1119 if (F->getExtInfo() == Info) 1120 return T; 1121 1122 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(F)) { 1123 ResultType = Context.getFunctionNoProtoType(FNPT->getResultType(), 1124 Info); 1125 } else { 1126 const FunctionProtoType *FPT = cast<FunctionProtoType>(F); 1127 ResultType 1128 = Context.getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1129 FPT->getNumArgs(), FPT->isVariadic(), 1130 FPT->getTypeQuals(), 1131 FPT->hasExceptionSpec(), 1132 FPT->hasAnyExceptionSpec(), 1133 FPT->getNumExceptions(), 1134 FPT->exception_begin(), 1135 Info); 1136 } 1137 } else 1138 return T; 1139 1140 return Context.getQualifiedType(ResultType, T.getLocalQualifiers()); 1141} 1142 1143QualType ASTContext::getNoReturnType(QualType T, bool AddNoReturn) { 1144 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1145 return getExtFunctionType(*this, T, 1146 Info.withNoReturn(AddNoReturn)); 1147} 1148 1149QualType ASTContext::getCallConvType(QualType T, CallingConv CallConv) { 1150 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1151 return getExtFunctionType(*this, T, 1152 Info.withCallingConv(CallConv)); 1153} 1154 1155QualType ASTContext::getRegParmType(QualType T, unsigned RegParm) { 1156 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1157 return getExtFunctionType(*this, T, 1158 Info.withRegParm(RegParm)); 1159} 1160 1161/// getComplexType - Return the uniqued reference to the type for a complex 1162/// number with the specified element type. 1163QualType ASTContext::getComplexType(QualType T) { 1164 // Unique pointers, to guarantee there is only one pointer of a particular 1165 // structure. 1166 llvm::FoldingSetNodeID ID; 1167 ComplexType::Profile(ID, T); 1168 1169 void *InsertPos = 0; 1170 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1171 return QualType(CT, 0); 1172 1173 // If the pointee type isn't canonical, this won't be a canonical type either, 1174 // so fill in the canonical type field. 1175 QualType Canonical; 1176 if (!T.isCanonical()) { 1177 Canonical = getComplexType(getCanonicalType(T)); 1178 1179 // Get the new insert position for the node we care about. 1180 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1181 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1182 } 1183 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1184 Types.push_back(New); 1185 ComplexTypes.InsertNode(New, InsertPos); 1186 return QualType(New, 0); 1187} 1188 1189/// getPointerType - Return the uniqued reference to the type for a pointer to 1190/// the specified type. 1191QualType ASTContext::getPointerType(QualType T) { 1192 // Unique pointers, to guarantee there is only one pointer of a particular 1193 // structure. 1194 llvm::FoldingSetNodeID ID; 1195 PointerType::Profile(ID, T); 1196 1197 void *InsertPos = 0; 1198 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1199 return QualType(PT, 0); 1200 1201 // If the pointee type isn't canonical, this won't be a canonical type either, 1202 // so fill in the canonical type field. 1203 QualType Canonical; 1204 if (!T.isCanonical()) { 1205 Canonical = getPointerType(getCanonicalType(T)); 1206 1207 // Get the new insert position for the node we care about. 1208 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1209 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1210 } 1211 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1212 Types.push_back(New); 1213 PointerTypes.InsertNode(New, InsertPos); 1214 return QualType(New, 0); 1215} 1216 1217/// getBlockPointerType - Return the uniqued reference to the type for 1218/// a pointer to the specified block. 1219QualType ASTContext::getBlockPointerType(QualType T) { 1220 assert(T->isFunctionType() && "block of function types only"); 1221 // Unique pointers, to guarantee there is only one block of a particular 1222 // structure. 1223 llvm::FoldingSetNodeID ID; 1224 BlockPointerType::Profile(ID, T); 1225 1226 void *InsertPos = 0; 1227 if (BlockPointerType *PT = 1228 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1229 return QualType(PT, 0); 1230 1231 // If the block pointee type isn't canonical, this won't be a canonical 1232 // type either so fill in the canonical type field. 1233 QualType Canonical; 1234 if (!T.isCanonical()) { 1235 Canonical = getBlockPointerType(getCanonicalType(T)); 1236 1237 // Get the new insert position for the node we care about. 1238 BlockPointerType *NewIP = 1239 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1240 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1241 } 1242 BlockPointerType *New 1243 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1244 Types.push_back(New); 1245 BlockPointerTypes.InsertNode(New, InsertPos); 1246 return QualType(New, 0); 1247} 1248 1249/// getLValueReferenceType - Return the uniqued reference to the type for an 1250/// lvalue reference to the specified type. 1251QualType ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) { 1252 // Unique pointers, to guarantee there is only one pointer of a particular 1253 // structure. 1254 llvm::FoldingSetNodeID ID; 1255 ReferenceType::Profile(ID, T, SpelledAsLValue); 1256 1257 void *InsertPos = 0; 1258 if (LValueReferenceType *RT = 1259 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1260 return QualType(RT, 0); 1261 1262 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1263 1264 // If the referencee type isn't canonical, this won't be a canonical type 1265 // either, so fill in the canonical type field. 1266 QualType Canonical; 1267 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1268 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1269 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1270 1271 // Get the new insert position for the node we care about. 1272 LValueReferenceType *NewIP = 1273 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1274 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1275 } 1276 1277 LValueReferenceType *New 1278 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1279 SpelledAsLValue); 1280 Types.push_back(New); 1281 LValueReferenceTypes.InsertNode(New, InsertPos); 1282 1283 return QualType(New, 0); 1284} 1285 1286/// getRValueReferenceType - Return the uniqued reference to the type for an 1287/// rvalue reference to the specified type. 1288QualType ASTContext::getRValueReferenceType(QualType T) { 1289 // Unique pointers, to guarantee there is only one pointer of a particular 1290 // structure. 1291 llvm::FoldingSetNodeID ID; 1292 ReferenceType::Profile(ID, T, false); 1293 1294 void *InsertPos = 0; 1295 if (RValueReferenceType *RT = 1296 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1297 return QualType(RT, 0); 1298 1299 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1300 1301 // If the referencee type isn't canonical, this won't be a canonical type 1302 // either, so fill in the canonical type field. 1303 QualType Canonical; 1304 if (InnerRef || !T.isCanonical()) { 1305 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1306 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1307 1308 // Get the new insert position for the node we care about. 1309 RValueReferenceType *NewIP = 1310 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1311 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1312 } 1313 1314 RValueReferenceType *New 1315 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1316 Types.push_back(New); 1317 RValueReferenceTypes.InsertNode(New, InsertPos); 1318 return QualType(New, 0); 1319} 1320 1321/// getMemberPointerType - Return the uniqued reference to the type for a 1322/// member pointer to the specified type, in the specified class. 1323QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) { 1324 // Unique pointers, to guarantee there is only one pointer of a particular 1325 // structure. 1326 llvm::FoldingSetNodeID ID; 1327 MemberPointerType::Profile(ID, T, Cls); 1328 1329 void *InsertPos = 0; 1330 if (MemberPointerType *PT = 1331 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1332 return QualType(PT, 0); 1333 1334 // If the pointee or class type isn't canonical, this won't be a canonical 1335 // type either, so fill in the canonical type field. 1336 QualType Canonical; 1337 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1338 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1339 1340 // Get the new insert position for the node we care about. 1341 MemberPointerType *NewIP = 1342 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1343 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1344 } 1345 MemberPointerType *New 1346 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1347 Types.push_back(New); 1348 MemberPointerTypes.InsertNode(New, InsertPos); 1349 return QualType(New, 0); 1350} 1351 1352/// getConstantArrayType - Return the unique reference to the type for an 1353/// array of the specified element type. 1354QualType ASTContext::getConstantArrayType(QualType EltTy, 1355 const llvm::APInt &ArySizeIn, 1356 ArrayType::ArraySizeModifier ASM, 1357 unsigned EltTypeQuals) { 1358 assert((EltTy->isDependentType() || 1359 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1360 "Constant array of VLAs is illegal!"); 1361 1362 // Convert the array size into a canonical width matching the pointer size for 1363 // the target. 1364 llvm::APInt ArySize(ArySizeIn); 1365 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1366 1367 llvm::FoldingSetNodeID ID; 1368 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1369 1370 void *InsertPos = 0; 1371 if (ConstantArrayType *ATP = 1372 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1373 return QualType(ATP, 0); 1374 1375 // If the element type isn't canonical, this won't be a canonical type either, 1376 // so fill in the canonical type field. 1377 QualType Canonical; 1378 if (!EltTy.isCanonical()) { 1379 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1380 ASM, EltTypeQuals); 1381 // Get the new insert position for the node we care about. 1382 ConstantArrayType *NewIP = 1383 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1384 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1385 } 1386 1387 ConstantArrayType *New = new(*this,TypeAlignment) 1388 ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1389 ConstantArrayTypes.InsertNode(New, InsertPos); 1390 Types.push_back(New); 1391 return QualType(New, 0); 1392} 1393 1394/// getVariableArrayType - Returns a non-unique reference to the type for a 1395/// variable array of the specified element type. 1396QualType ASTContext::getVariableArrayType(QualType EltTy, 1397 Expr *NumElts, 1398 ArrayType::ArraySizeModifier ASM, 1399 unsigned EltTypeQuals, 1400 SourceRange Brackets) { 1401 // Since we don't unique expressions, it isn't possible to unique VLA's 1402 // that have an expression provided for their size. 1403 QualType CanonType; 1404 1405 if (!EltTy.isCanonical()) { 1406 if (NumElts) 1407 NumElts->Retain(); 1408 CanonType = getVariableArrayType(getCanonicalType(EltTy), NumElts, ASM, 1409 EltTypeQuals, Brackets); 1410 } 1411 1412 VariableArrayType *New = new(*this, TypeAlignment) 1413 VariableArrayType(EltTy, CanonType, NumElts, ASM, EltTypeQuals, Brackets); 1414 1415 VariableArrayTypes.push_back(New); 1416 Types.push_back(New); 1417 return QualType(New, 0); 1418} 1419 1420/// getDependentSizedArrayType - Returns a non-unique reference to 1421/// the type for a dependently-sized array of the specified element 1422/// type. 1423QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1424 Expr *NumElts, 1425 ArrayType::ArraySizeModifier ASM, 1426 unsigned EltTypeQuals, 1427 SourceRange Brackets) { 1428 assert((!NumElts || NumElts->isTypeDependent() || 1429 NumElts->isValueDependent()) && 1430 "Size must be type- or value-dependent!"); 1431 1432 void *InsertPos = 0; 1433 DependentSizedArrayType *Canon = 0; 1434 llvm::FoldingSetNodeID ID; 1435 1436 if (NumElts) { 1437 // Dependently-sized array types that do not have a specified 1438 // number of elements will have their sizes deduced from an 1439 // initializer. 1440 DependentSizedArrayType::Profile(ID, *this, getCanonicalType(EltTy), ASM, 1441 EltTypeQuals, NumElts); 1442 1443 Canon = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1444 } 1445 1446 DependentSizedArrayType *New; 1447 if (Canon) { 1448 // We already have a canonical version of this array type; use it as 1449 // the canonical type for a newly-built type. 1450 New = new (*this, TypeAlignment) 1451 DependentSizedArrayType(*this, EltTy, QualType(Canon, 0), 1452 NumElts, ASM, EltTypeQuals, Brackets); 1453 } else { 1454 QualType CanonEltTy = getCanonicalType(EltTy); 1455 if (CanonEltTy == EltTy) { 1456 New = new (*this, TypeAlignment) 1457 DependentSizedArrayType(*this, EltTy, QualType(), 1458 NumElts, ASM, EltTypeQuals, Brackets); 1459 1460 if (NumElts) { 1461 DependentSizedArrayType *CanonCheck 1462 = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1463 assert(!CanonCheck && "Dependent-sized canonical array type broken"); 1464 (void)CanonCheck; 1465 DependentSizedArrayTypes.InsertNode(New, InsertPos); 1466 } 1467 } else { 1468 QualType Canon = getDependentSizedArrayType(CanonEltTy, NumElts, 1469 ASM, EltTypeQuals, 1470 SourceRange()); 1471 New = new (*this, TypeAlignment) 1472 DependentSizedArrayType(*this, EltTy, Canon, 1473 NumElts, ASM, EltTypeQuals, Brackets); 1474 } 1475 } 1476 1477 Types.push_back(New); 1478 return QualType(New, 0); 1479} 1480 1481QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1482 ArrayType::ArraySizeModifier ASM, 1483 unsigned EltTypeQuals) { 1484 llvm::FoldingSetNodeID ID; 1485 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1486 1487 void *InsertPos = 0; 1488 if (IncompleteArrayType *ATP = 1489 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1490 return QualType(ATP, 0); 1491 1492 // If the element type isn't canonical, this won't be a canonical type 1493 // either, so fill in the canonical type field. 1494 QualType Canonical; 1495 1496 if (!EltTy.isCanonical()) { 1497 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1498 ASM, EltTypeQuals); 1499 1500 // Get the new insert position for the node we care about. 1501 IncompleteArrayType *NewIP = 1502 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1503 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1504 } 1505 1506 IncompleteArrayType *New = new (*this, TypeAlignment) 1507 IncompleteArrayType(EltTy, Canonical, ASM, EltTypeQuals); 1508 1509 IncompleteArrayTypes.InsertNode(New, InsertPos); 1510 Types.push_back(New); 1511 return QualType(New, 0); 1512} 1513 1514/// getVectorType - Return the unique reference to a vector type of 1515/// the specified element type and size. VectorType must be a built-in type. 1516QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1517 VectorType::AltiVecSpecific AltiVecSpec) { 1518 BuiltinType *baseType; 1519 1520 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1521 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1522 1523 // Check if we've already instantiated a vector of this type. 1524 llvm::FoldingSetNodeID ID; 1525 VectorType::Profile(ID, vecType, NumElts, Type::Vector, AltiVecSpec); 1526 1527 void *InsertPos = 0; 1528 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1529 return QualType(VTP, 0); 1530 1531 // If the element type isn't canonical, this won't be a canonical type either, 1532 // so fill in the canonical type field. 1533 QualType Canonical; 1534 if (!vecType.isCanonical() || (AltiVecSpec == VectorType::AltiVec)) { 1535 // pass VectorType::NotAltiVec for AltiVecSpec to make AltiVec canonical 1536 // vector type (except 'vector bool ...' and 'vector Pixel') the same as 1537 // the equivalent GCC vector types 1538 Canonical = getVectorType(getCanonicalType(vecType), NumElts, 1539 VectorType::NotAltiVec); 1540 1541 // Get the new insert position for the node we care about. 1542 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1543 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1544 } 1545 VectorType *New = new (*this, TypeAlignment) 1546 VectorType(vecType, NumElts, Canonical, AltiVecSpec); 1547 VectorTypes.InsertNode(New, InsertPos); 1548 Types.push_back(New); 1549 return QualType(New, 0); 1550} 1551 1552/// getExtVectorType - Return the unique reference to an extended vector type of 1553/// the specified element type and size. VectorType must be a built-in type. 1554QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1555 BuiltinType *baseType; 1556 1557 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1558 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1559 1560 // Check if we've already instantiated a vector of this type. 1561 llvm::FoldingSetNodeID ID; 1562 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, 1563 VectorType::NotAltiVec); 1564 void *InsertPos = 0; 1565 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1566 return QualType(VTP, 0); 1567 1568 // If the element type isn't canonical, this won't be a canonical type either, 1569 // so fill in the canonical type field. 1570 QualType Canonical; 1571 if (!vecType.isCanonical()) { 1572 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1573 1574 // Get the new insert position for the node we care about. 1575 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1576 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1577 } 1578 ExtVectorType *New = new (*this, TypeAlignment) 1579 ExtVectorType(vecType, NumElts, Canonical); 1580 VectorTypes.InsertNode(New, InsertPos); 1581 Types.push_back(New); 1582 return QualType(New, 0); 1583} 1584 1585QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1586 Expr *SizeExpr, 1587 SourceLocation AttrLoc) { 1588 llvm::FoldingSetNodeID ID; 1589 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1590 SizeExpr); 1591 1592 void *InsertPos = 0; 1593 DependentSizedExtVectorType *Canon 1594 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1595 DependentSizedExtVectorType *New; 1596 if (Canon) { 1597 // We already have a canonical version of this array type; use it as 1598 // the canonical type for a newly-built type. 1599 New = new (*this, TypeAlignment) 1600 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1601 SizeExpr, AttrLoc); 1602 } else { 1603 QualType CanonVecTy = getCanonicalType(vecType); 1604 if (CanonVecTy == vecType) { 1605 New = new (*this, TypeAlignment) 1606 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1607 AttrLoc); 1608 1609 DependentSizedExtVectorType *CanonCheck 1610 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1611 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1612 (void)CanonCheck; 1613 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1614 } else { 1615 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1616 SourceLocation()); 1617 New = new (*this, TypeAlignment) 1618 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1619 } 1620 } 1621 1622 Types.push_back(New); 1623 return QualType(New, 0); 1624} 1625 1626/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1627/// 1628QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, 1629 const FunctionType::ExtInfo &Info) { 1630 const CallingConv CallConv = Info.getCC(); 1631 // Unique functions, to guarantee there is only one function of a particular 1632 // structure. 1633 llvm::FoldingSetNodeID ID; 1634 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1635 1636 void *InsertPos = 0; 1637 if (FunctionNoProtoType *FT = 1638 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1639 return QualType(FT, 0); 1640 1641 QualType Canonical; 1642 if (!ResultTy.isCanonical() || 1643 getCanonicalCallConv(CallConv) != CallConv) { 1644 Canonical = 1645 getFunctionNoProtoType(getCanonicalType(ResultTy), 1646 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1647 1648 // Get the new insert position for the node we care about. 1649 FunctionNoProtoType *NewIP = 1650 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1651 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1652 } 1653 1654 FunctionNoProtoType *New = new (*this, TypeAlignment) 1655 FunctionNoProtoType(ResultTy, Canonical, Info); 1656 Types.push_back(New); 1657 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1658 return QualType(New, 0); 1659} 1660 1661/// getFunctionType - Return a normal function type with a typed argument 1662/// list. isVariadic indicates whether the argument list includes '...'. 1663QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1664 unsigned NumArgs, bool isVariadic, 1665 unsigned TypeQuals, bool hasExceptionSpec, 1666 bool hasAnyExceptionSpec, unsigned NumExs, 1667 const QualType *ExArray, 1668 const FunctionType::ExtInfo &Info) { 1669 const CallingConv CallConv= Info.getCC(); 1670 // Unique functions, to guarantee there is only one function of a particular 1671 // structure. 1672 llvm::FoldingSetNodeID ID; 1673 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1674 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1675 NumExs, ExArray, Info); 1676 1677 void *InsertPos = 0; 1678 if (FunctionProtoType *FTP = 1679 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1680 return QualType(FTP, 0); 1681 1682 // Determine whether the type being created is already canonical or not. 1683 bool isCanonical = !hasExceptionSpec && ResultTy.isCanonical(); 1684 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1685 if (!ArgArray[i].isCanonicalAsParam()) 1686 isCanonical = false; 1687 1688 // If this type isn't canonical, get the canonical version of it. 1689 // The exception spec is not part of the canonical type. 1690 QualType Canonical; 1691 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1692 llvm::SmallVector<QualType, 16> CanonicalArgs; 1693 CanonicalArgs.reserve(NumArgs); 1694 for (unsigned i = 0; i != NumArgs; ++i) 1695 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1696 1697 Canonical = getFunctionType(getCanonicalType(ResultTy), 1698 CanonicalArgs.data(), NumArgs, 1699 isVariadic, TypeQuals, false, 1700 false, 0, 0, 1701 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1702 1703 // Get the new insert position for the node we care about. 1704 FunctionProtoType *NewIP = 1705 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1706 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1707 } 1708 1709 // FunctionProtoType objects are allocated with extra bytes after them 1710 // for two variable size arrays (for parameter and exception types) at the 1711 // end of them. 1712 FunctionProtoType *FTP = 1713 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1714 NumArgs*sizeof(QualType) + 1715 NumExs*sizeof(QualType), TypeAlignment); 1716 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1717 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1718 ExArray, NumExs, Canonical, Info); 1719 Types.push_back(FTP); 1720 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1721 return QualType(FTP, 0); 1722} 1723 1724#ifndef NDEBUG 1725static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1726 if (!isa<CXXRecordDecl>(D)) return false; 1727 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1728 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1729 return true; 1730 if (RD->getDescribedClassTemplate() && 1731 !isa<ClassTemplateSpecializationDecl>(RD)) 1732 return true; 1733 return false; 1734} 1735#endif 1736 1737/// getInjectedClassNameType - Return the unique reference to the 1738/// injected class name type for the specified templated declaration. 1739QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1740 QualType TST) { 1741 assert(NeedsInjectedClassNameType(Decl)); 1742 if (Decl->TypeForDecl) { 1743 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1744 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDeclaration()) { 1745 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1746 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1747 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1748 } else { 1749 Decl->TypeForDecl = 1750 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 1751 Types.push_back(Decl->TypeForDecl); 1752 } 1753 return QualType(Decl->TypeForDecl, 0); 1754} 1755 1756/// getTypeDeclType - Return the unique reference to the type for the 1757/// specified type declaration. 1758QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) { 1759 assert(Decl && "Passed null for Decl param"); 1760 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 1761 1762 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1763 return getTypedefType(Typedef); 1764 1765 assert(!isa<TemplateTypeParmDecl>(Decl) && 1766 "Template type parameter types are always available."); 1767 1768 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1769 assert(!Record->getPreviousDeclaration() && 1770 "struct/union has previous declaration"); 1771 assert(!NeedsInjectedClassNameType(Record)); 1772 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Record); 1773 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1774 assert(!Enum->getPreviousDeclaration() && 1775 "enum has previous declaration"); 1776 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Enum); 1777 } else if (const UnresolvedUsingTypenameDecl *Using = 1778 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1779 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1780 } else 1781 llvm_unreachable("TypeDecl without a type?"); 1782 1783 Types.push_back(Decl->TypeForDecl); 1784 return QualType(Decl->TypeForDecl, 0); 1785} 1786 1787/// getTypedefType - Return the unique reference to the type for the 1788/// specified typename decl. 1789QualType 1790ASTContext::getTypedefType(const TypedefDecl *Decl, QualType Canonical) { 1791 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1792 1793 if (Canonical.isNull()) 1794 Canonical = getCanonicalType(Decl->getUnderlyingType()); 1795 Decl->TypeForDecl = new(*this, TypeAlignment) 1796 TypedefType(Type::Typedef, Decl, Canonical); 1797 Types.push_back(Decl->TypeForDecl); 1798 return QualType(Decl->TypeForDecl, 0); 1799} 1800 1801/// \brief Retrieve a substitution-result type. 1802QualType 1803ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1804 QualType Replacement) { 1805 assert(Replacement.isCanonical() 1806 && "replacement types must always be canonical"); 1807 1808 llvm::FoldingSetNodeID ID; 1809 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1810 void *InsertPos = 0; 1811 SubstTemplateTypeParmType *SubstParm 1812 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1813 1814 if (!SubstParm) { 1815 SubstParm = new (*this, TypeAlignment) 1816 SubstTemplateTypeParmType(Parm, Replacement); 1817 Types.push_back(SubstParm); 1818 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1819 } 1820 1821 return QualType(SubstParm, 0); 1822} 1823 1824/// \brief Retrieve the template type parameter type for a template 1825/// parameter or parameter pack with the given depth, index, and (optionally) 1826/// name. 1827QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1828 bool ParameterPack, 1829 IdentifierInfo *Name) { 1830 llvm::FoldingSetNodeID ID; 1831 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1832 void *InsertPos = 0; 1833 TemplateTypeParmType *TypeParm 1834 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1835 1836 if (TypeParm) 1837 return QualType(TypeParm, 0); 1838 1839 if (Name) { 1840 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1841 TypeParm = new (*this, TypeAlignment) 1842 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 1843 1844 TemplateTypeParmType *TypeCheck 1845 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1846 assert(!TypeCheck && "Template type parameter canonical type broken"); 1847 (void)TypeCheck; 1848 } else 1849 TypeParm = new (*this, TypeAlignment) 1850 TemplateTypeParmType(Depth, Index, ParameterPack); 1851 1852 Types.push_back(TypeParm); 1853 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1854 1855 return QualType(TypeParm, 0); 1856} 1857 1858TypeSourceInfo * 1859ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 1860 SourceLocation NameLoc, 1861 const TemplateArgumentListInfo &Args, 1862 QualType CanonType) { 1863 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 1864 1865 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 1866 TemplateSpecializationTypeLoc TL 1867 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 1868 TL.setTemplateNameLoc(NameLoc); 1869 TL.setLAngleLoc(Args.getLAngleLoc()); 1870 TL.setRAngleLoc(Args.getRAngleLoc()); 1871 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 1872 TL.setArgLocInfo(i, Args[i].getLocInfo()); 1873 return DI; 1874} 1875 1876QualType 1877ASTContext::getTemplateSpecializationType(TemplateName Template, 1878 const TemplateArgumentListInfo &Args, 1879 QualType Canon) { 1880 unsigned NumArgs = Args.size(); 1881 1882 llvm::SmallVector<TemplateArgument, 4> ArgVec; 1883 ArgVec.reserve(NumArgs); 1884 for (unsigned i = 0; i != NumArgs; ++i) 1885 ArgVec.push_back(Args[i].getArgument()); 1886 1887 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 1888 Canon); 1889} 1890 1891QualType 1892ASTContext::getTemplateSpecializationType(TemplateName Template, 1893 const TemplateArgument *Args, 1894 unsigned NumArgs, 1895 QualType Canon) { 1896 if (!Canon.isNull()) 1897 Canon = getCanonicalType(Canon); 1898 else 1899 Canon = getCanonicalTemplateSpecializationType(Template, Args, NumArgs); 1900 1901 // Allocate the (non-canonical) template specialization type, but don't 1902 // try to unique it: these types typically have location information that 1903 // we don't unique and don't want to lose. 1904 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1905 sizeof(TemplateArgument) * NumArgs), 1906 TypeAlignment); 1907 TemplateSpecializationType *Spec 1908 = new (Mem) TemplateSpecializationType(Template, 1909 Args, NumArgs, 1910 Canon); 1911 1912 Types.push_back(Spec); 1913 return QualType(Spec, 0); 1914} 1915 1916QualType 1917ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template, 1918 const TemplateArgument *Args, 1919 unsigned NumArgs) { 1920 // Build the canonical template specialization type. 1921 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 1922 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 1923 CanonArgs.reserve(NumArgs); 1924 for (unsigned I = 0; I != NumArgs; ++I) 1925 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 1926 1927 // Determine whether this canonical template specialization type already 1928 // exists. 1929 llvm::FoldingSetNodeID ID; 1930 TemplateSpecializationType::Profile(ID, CanonTemplate, 1931 CanonArgs.data(), NumArgs, *this); 1932 1933 void *InsertPos = 0; 1934 TemplateSpecializationType *Spec 1935 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1936 1937 if (!Spec) { 1938 // Allocate a new canonical template specialization type. 1939 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1940 sizeof(TemplateArgument) * NumArgs), 1941 TypeAlignment); 1942 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 1943 CanonArgs.data(), NumArgs, 1944 QualType()); 1945 Types.push_back(Spec); 1946 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1947 } 1948 1949 assert(Spec->isDependentType() && 1950 "Non-dependent template-id type must have a canonical type"); 1951 return QualType(Spec, 0); 1952} 1953 1954QualType 1955ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 1956 NestedNameSpecifier *NNS, 1957 QualType NamedType) { 1958 llvm::FoldingSetNodeID ID; 1959 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 1960 1961 void *InsertPos = 0; 1962 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1963 if (T) 1964 return QualType(T, 0); 1965 1966 QualType Canon = NamedType; 1967 if (!Canon.isCanonical()) { 1968 Canon = getCanonicalType(NamedType); 1969 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1970 assert(!CheckT && "Elaborated canonical type broken"); 1971 (void)CheckT; 1972 } 1973 1974 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 1975 Types.push_back(T); 1976 ElaboratedTypes.InsertNode(T, InsertPos); 1977 return QualType(T, 0); 1978} 1979 1980QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 1981 NestedNameSpecifier *NNS, 1982 const IdentifierInfo *Name, 1983 QualType Canon) { 1984 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1985 1986 if (Canon.isNull()) { 1987 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1988 ElaboratedTypeKeyword CanonKeyword = Keyword; 1989 if (Keyword == ETK_None) 1990 CanonKeyword = ETK_Typename; 1991 1992 if (CanonNNS != NNS || CanonKeyword != Keyword) 1993 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 1994 } 1995 1996 llvm::FoldingSetNodeID ID; 1997 DependentNameType::Profile(ID, Keyword, NNS, Name); 1998 1999 void *InsertPos = 0; 2000 DependentNameType *T 2001 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2002 if (T) 2003 return QualType(T, 0); 2004 2005 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 2006 Types.push_back(T); 2007 DependentNameTypes.InsertNode(T, InsertPos); 2008 return QualType(T, 0); 2009} 2010 2011QualType 2012ASTContext::getDependentTemplateSpecializationType( 2013 ElaboratedTypeKeyword Keyword, 2014 NestedNameSpecifier *NNS, 2015 const IdentifierInfo *Name, 2016 const TemplateArgumentListInfo &Args) { 2017 // TODO: avoid this copy 2018 llvm::SmallVector<TemplateArgument, 16> ArgCopy; 2019 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2020 ArgCopy.push_back(Args[I].getArgument()); 2021 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2022 ArgCopy.size(), 2023 ArgCopy.data()); 2024} 2025 2026QualType 2027ASTContext::getDependentTemplateSpecializationType( 2028 ElaboratedTypeKeyword Keyword, 2029 NestedNameSpecifier *NNS, 2030 const IdentifierInfo *Name, 2031 unsigned NumArgs, 2032 const TemplateArgument *Args) { 2033 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2034 2035 llvm::FoldingSetNodeID ID; 2036 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2037 Name, NumArgs, Args); 2038 2039 void *InsertPos = 0; 2040 DependentTemplateSpecializationType *T 2041 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2042 if (T) 2043 return QualType(T, 0); 2044 2045 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2046 2047 ElaboratedTypeKeyword CanonKeyword = Keyword; 2048 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2049 2050 bool AnyNonCanonArgs = false; 2051 llvm::SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2052 for (unsigned I = 0; I != NumArgs; ++I) { 2053 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2054 if (!CanonArgs[I].structurallyEquals(Args[I])) 2055 AnyNonCanonArgs = true; 2056 } 2057 2058 QualType Canon; 2059 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2060 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2061 Name, NumArgs, 2062 CanonArgs.data()); 2063 2064 // Find the insert position again. 2065 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2066 } 2067 2068 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2069 sizeof(TemplateArgument) * NumArgs), 2070 TypeAlignment); 2071 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2072 Name, NumArgs, Args, Canon); 2073 Types.push_back(T); 2074 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2075 return QualType(T, 0); 2076} 2077 2078/// CmpProtocolNames - Comparison predicate for sorting protocols 2079/// alphabetically. 2080static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2081 const ObjCProtocolDecl *RHS) { 2082 return LHS->getDeclName() < RHS->getDeclName(); 2083} 2084 2085static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2086 unsigned NumProtocols) { 2087 if (NumProtocols == 0) return true; 2088 2089 for (unsigned i = 1; i != NumProtocols; ++i) 2090 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2091 return false; 2092 return true; 2093} 2094 2095static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2096 unsigned &NumProtocols) { 2097 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2098 2099 // Sort protocols, keyed by name. 2100 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2101 2102 // Remove duplicates. 2103 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2104 NumProtocols = ProtocolsEnd-Protocols; 2105} 2106 2107QualType ASTContext::getObjCObjectType(QualType BaseType, 2108 ObjCProtocolDecl * const *Protocols, 2109 unsigned NumProtocols) { 2110 // If the base type is an interface and there aren't any protocols 2111 // to add, then the interface type will do just fine. 2112 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2113 return BaseType; 2114 2115 // Look in the folding set for an existing type. 2116 llvm::FoldingSetNodeID ID; 2117 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2118 void *InsertPos = 0; 2119 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2120 return QualType(QT, 0); 2121 2122 // Build the canonical type, which has the canonical base type and 2123 // a sorted-and-uniqued list of protocols. 2124 QualType Canonical; 2125 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2126 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2127 if (!ProtocolsSorted) { 2128 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2129 Protocols + NumProtocols); 2130 unsigned UniqueCount = NumProtocols; 2131 2132 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2133 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2134 &Sorted[0], UniqueCount); 2135 } else { 2136 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2137 Protocols, NumProtocols); 2138 } 2139 2140 // Regenerate InsertPos. 2141 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2142 } 2143 2144 unsigned Size = sizeof(ObjCObjectTypeImpl); 2145 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2146 void *Mem = Allocate(Size, TypeAlignment); 2147 ObjCObjectTypeImpl *T = 2148 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2149 2150 Types.push_back(T); 2151 ObjCObjectTypes.InsertNode(T, InsertPos); 2152 return QualType(T, 0); 2153} 2154 2155/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2156/// the given object type. 2157QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) { 2158 llvm::FoldingSetNodeID ID; 2159 ObjCObjectPointerType::Profile(ID, ObjectT); 2160 2161 void *InsertPos = 0; 2162 if (ObjCObjectPointerType *QT = 2163 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2164 return QualType(QT, 0); 2165 2166 // Find the canonical object type. 2167 QualType Canonical; 2168 if (!ObjectT.isCanonical()) { 2169 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2170 2171 // Regenerate InsertPos. 2172 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2173 } 2174 2175 // No match. 2176 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2177 ObjCObjectPointerType *QType = 2178 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2179 2180 Types.push_back(QType); 2181 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2182 return QualType(QType, 0); 2183} 2184 2185/// getObjCInterfaceType - Return the unique reference to the type for the 2186/// specified ObjC interface decl. The list of protocols is optional. 2187QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) { 2188 if (Decl->TypeForDecl) 2189 return QualType(Decl->TypeForDecl, 0); 2190 2191 // FIXME: redeclarations? 2192 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2193 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2194 Decl->TypeForDecl = T; 2195 Types.push_back(T); 2196 return QualType(T, 0); 2197} 2198 2199/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2200/// TypeOfExprType AST's (since expression's are never shared). For example, 2201/// multiple declarations that refer to "typeof(x)" all contain different 2202/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2203/// on canonical type's (which are always unique). 2204QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2205 TypeOfExprType *toe; 2206 if (tofExpr->isTypeDependent()) { 2207 llvm::FoldingSetNodeID ID; 2208 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2209 2210 void *InsertPos = 0; 2211 DependentTypeOfExprType *Canon 2212 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2213 if (Canon) { 2214 // We already have a "canonical" version of an identical, dependent 2215 // typeof(expr) type. Use that as our canonical type. 2216 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2217 QualType((TypeOfExprType*)Canon, 0)); 2218 } 2219 else { 2220 // Build a new, canonical typeof(expr) type. 2221 Canon 2222 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2223 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2224 toe = Canon; 2225 } 2226 } else { 2227 QualType Canonical = getCanonicalType(tofExpr->getType()); 2228 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2229 } 2230 Types.push_back(toe); 2231 return QualType(toe, 0); 2232} 2233 2234/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2235/// TypeOfType AST's. The only motivation to unique these nodes would be 2236/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2237/// an issue. This doesn't effect the type checker, since it operates 2238/// on canonical type's (which are always unique). 2239QualType ASTContext::getTypeOfType(QualType tofType) { 2240 QualType Canonical = getCanonicalType(tofType); 2241 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2242 Types.push_back(tot); 2243 return QualType(tot, 0); 2244} 2245 2246/// getDecltypeForExpr - Given an expr, will return the decltype for that 2247/// expression, according to the rules in C++0x [dcl.type.simple]p4 2248static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2249 if (e->isTypeDependent()) 2250 return Context.DependentTy; 2251 2252 // If e is an id expression or a class member access, decltype(e) is defined 2253 // as the type of the entity named by e. 2254 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2255 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2256 return VD->getType(); 2257 } 2258 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2259 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2260 return FD->getType(); 2261 } 2262 // If e is a function call or an invocation of an overloaded operator, 2263 // (parentheses around e are ignored), decltype(e) is defined as the 2264 // return type of that function. 2265 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2266 return CE->getCallReturnType(); 2267 2268 QualType T = e->getType(); 2269 2270 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2271 // defined as T&, otherwise decltype(e) is defined as T. 2272 if (e->isLvalue(Context) == Expr::LV_Valid) 2273 T = Context.getLValueReferenceType(T); 2274 2275 return T; 2276} 2277 2278/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2279/// DecltypeType AST's. The only motivation to unique these nodes would be 2280/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2281/// an issue. This doesn't effect the type checker, since it operates 2282/// on canonical type's (which are always unique). 2283QualType ASTContext::getDecltypeType(Expr *e) { 2284 DecltypeType *dt; 2285 if (e->isTypeDependent()) { 2286 llvm::FoldingSetNodeID ID; 2287 DependentDecltypeType::Profile(ID, *this, e); 2288 2289 void *InsertPos = 0; 2290 DependentDecltypeType *Canon 2291 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2292 if (Canon) { 2293 // We already have a "canonical" version of an equivalent, dependent 2294 // decltype type. Use that as our canonical type. 2295 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2296 QualType((DecltypeType*)Canon, 0)); 2297 } 2298 else { 2299 // Build a new, canonical typeof(expr) type. 2300 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2301 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2302 dt = Canon; 2303 } 2304 } else { 2305 QualType T = getDecltypeForExpr(e, *this); 2306 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2307 } 2308 Types.push_back(dt); 2309 return QualType(dt, 0); 2310} 2311 2312/// getTagDeclType - Return the unique reference to the type for the 2313/// specified TagDecl (struct/union/class/enum) decl. 2314QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2315 assert (Decl); 2316 // FIXME: What is the design on getTagDeclType when it requires casting 2317 // away const? mutable? 2318 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2319} 2320 2321/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2322/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2323/// needs to agree with the definition in <stddef.h>. 2324CanQualType ASTContext::getSizeType() const { 2325 return getFromTargetType(Target.getSizeType()); 2326} 2327 2328/// getSignedWCharType - Return the type of "signed wchar_t". 2329/// Used when in C++, as a GCC extension. 2330QualType ASTContext::getSignedWCharType() const { 2331 // FIXME: derive from "Target" ? 2332 return WCharTy; 2333} 2334 2335/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2336/// Used when in C++, as a GCC extension. 2337QualType ASTContext::getUnsignedWCharType() const { 2338 // FIXME: derive from "Target" ? 2339 return UnsignedIntTy; 2340} 2341 2342/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2343/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2344QualType ASTContext::getPointerDiffType() const { 2345 return getFromTargetType(Target.getPtrDiffType(0)); 2346} 2347 2348//===----------------------------------------------------------------------===// 2349// Type Operators 2350//===----------------------------------------------------------------------===// 2351 2352CanQualType ASTContext::getCanonicalParamType(QualType T) { 2353 // Push qualifiers into arrays, and then discard any remaining 2354 // qualifiers. 2355 T = getCanonicalType(T); 2356 const Type *Ty = T.getTypePtr(); 2357 2358 QualType Result; 2359 if (isa<ArrayType>(Ty)) { 2360 Result = getArrayDecayedType(QualType(Ty,0)); 2361 } else if (isa<FunctionType>(Ty)) { 2362 Result = getPointerType(QualType(Ty, 0)); 2363 } else { 2364 Result = QualType(Ty, 0); 2365 } 2366 2367 return CanQualType::CreateUnsafe(Result); 2368} 2369 2370/// getCanonicalType - Return the canonical (structural) type corresponding to 2371/// the specified potentially non-canonical type. The non-canonical version 2372/// of a type may have many "decorated" versions of types. Decorators can 2373/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2374/// to be free of any of these, allowing two canonical types to be compared 2375/// for exact equality with a simple pointer comparison. 2376CanQualType ASTContext::getCanonicalType(QualType T) { 2377 QualifierCollector Quals; 2378 const Type *Ptr = Quals.strip(T); 2379 QualType CanType = Ptr->getCanonicalTypeInternal(); 2380 2381 // The canonical internal type will be the canonical type *except* 2382 // that we push type qualifiers down through array types. 2383 2384 // If there are no new qualifiers to push down, stop here. 2385 if (!Quals.hasQualifiers()) 2386 return CanQualType::CreateUnsafe(CanType); 2387 2388 // If the type qualifiers are on an array type, get the canonical 2389 // type of the array with the qualifiers applied to the element 2390 // type. 2391 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2392 if (!AT) 2393 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2394 2395 // Get the canonical version of the element with the extra qualifiers on it. 2396 // This can recursively sink qualifiers through multiple levels of arrays. 2397 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2398 NewEltTy = getCanonicalType(NewEltTy); 2399 2400 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2401 return CanQualType::CreateUnsafe( 2402 getConstantArrayType(NewEltTy, CAT->getSize(), 2403 CAT->getSizeModifier(), 2404 CAT->getIndexTypeCVRQualifiers())); 2405 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2406 return CanQualType::CreateUnsafe( 2407 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2408 IAT->getIndexTypeCVRQualifiers())); 2409 2410 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2411 return CanQualType::CreateUnsafe( 2412 getDependentSizedArrayType(NewEltTy, 2413 DSAT->getSizeExpr() ? 2414 DSAT->getSizeExpr()->Retain() : 0, 2415 DSAT->getSizeModifier(), 2416 DSAT->getIndexTypeCVRQualifiers(), 2417 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2418 2419 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2420 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2421 VAT->getSizeExpr() ? 2422 VAT->getSizeExpr()->Retain() : 0, 2423 VAT->getSizeModifier(), 2424 VAT->getIndexTypeCVRQualifiers(), 2425 VAT->getBracketsRange())); 2426} 2427 2428QualType ASTContext::getUnqualifiedArrayType(QualType T, 2429 Qualifiers &Quals) { 2430 Quals = T.getQualifiers(); 2431 const ArrayType *AT = getAsArrayType(T); 2432 if (!AT) { 2433 return T.getUnqualifiedType(); 2434 } 2435 2436 QualType Elt = AT->getElementType(); 2437 QualType UnqualElt = getUnqualifiedArrayType(Elt, Quals); 2438 if (Elt == UnqualElt) 2439 return T; 2440 2441 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 2442 return getConstantArrayType(UnqualElt, CAT->getSize(), 2443 CAT->getSizeModifier(), 0); 2444 } 2445 2446 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 2447 return getIncompleteArrayType(UnqualElt, IAT->getSizeModifier(), 0); 2448 } 2449 2450 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 2451 return getVariableArrayType(UnqualElt, 2452 VAT->getSizeExpr() ? 2453 VAT->getSizeExpr()->Retain() : 0, 2454 VAT->getSizeModifier(), 2455 VAT->getIndexTypeCVRQualifiers(), 2456 VAT->getBracketsRange()); 2457 } 2458 2459 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 2460 return getDependentSizedArrayType(UnqualElt, DSAT->getSizeExpr()->Retain(), 2461 DSAT->getSizeModifier(), 0, 2462 SourceRange()); 2463} 2464 2465/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 2466/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 2467/// they point to and return true. If T1 and T2 aren't pointer types 2468/// or pointer-to-member types, or if they are not similar at this 2469/// level, returns false and leaves T1 and T2 unchanged. Top-level 2470/// qualifiers on T1 and T2 are ignored. This function will typically 2471/// be called in a loop that successively "unwraps" pointer and 2472/// pointer-to-member types to compare them at each level. 2473bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 2474 const PointerType *T1PtrType = T1->getAs<PointerType>(), 2475 *T2PtrType = T2->getAs<PointerType>(); 2476 if (T1PtrType && T2PtrType) { 2477 T1 = T1PtrType->getPointeeType(); 2478 T2 = T2PtrType->getPointeeType(); 2479 return true; 2480 } 2481 2482 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 2483 *T2MPType = T2->getAs<MemberPointerType>(); 2484 if (T1MPType && T2MPType && 2485 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 2486 QualType(T2MPType->getClass(), 0))) { 2487 T1 = T1MPType->getPointeeType(); 2488 T2 = T2MPType->getPointeeType(); 2489 return true; 2490 } 2491 2492 if (getLangOptions().ObjC1) { 2493 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 2494 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 2495 if (T1OPType && T2OPType) { 2496 T1 = T1OPType->getPointeeType(); 2497 T2 = T2OPType->getPointeeType(); 2498 return true; 2499 } 2500 } 2501 2502 // FIXME: Block pointers, too? 2503 2504 return false; 2505} 2506 2507DeclarationName ASTContext::getNameForTemplate(TemplateName Name) { 2508 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2509 return TD->getDeclName(); 2510 2511 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2512 if (DTN->isIdentifier()) { 2513 return DeclarationNames.getIdentifier(DTN->getIdentifier()); 2514 } else { 2515 return DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2516 } 2517 } 2518 2519 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2520 assert(Storage); 2521 return (*Storage->begin())->getDeclName(); 2522} 2523 2524TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2525 if (TemplateDecl *Template = Name.getAsTemplateDecl()) { 2526 if (TemplateTemplateParmDecl *TTP 2527 = dyn_cast<TemplateTemplateParmDecl>(Template)) 2528 Template = getCanonicalTemplateTemplateParmDecl(TTP); 2529 2530 // The canonical template name is the canonical template declaration. 2531 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2532 } 2533 2534 assert(!Name.getAsOverloadedTemplate()); 2535 2536 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2537 assert(DTN && "Non-dependent template names must refer to template decls."); 2538 return DTN->CanonicalTemplateName; 2539} 2540 2541bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2542 X = getCanonicalTemplateName(X); 2543 Y = getCanonicalTemplateName(Y); 2544 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2545} 2546 2547TemplateArgument 2548ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2549 switch (Arg.getKind()) { 2550 case TemplateArgument::Null: 2551 return Arg; 2552 2553 case TemplateArgument::Expression: 2554 return Arg; 2555 2556 case TemplateArgument::Declaration: 2557 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2558 2559 case TemplateArgument::Template: 2560 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2561 2562 case TemplateArgument::Integral: 2563 return TemplateArgument(*Arg.getAsIntegral(), 2564 getCanonicalType(Arg.getIntegralType())); 2565 2566 case TemplateArgument::Type: 2567 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2568 2569 case TemplateArgument::Pack: { 2570 // FIXME: Allocate in ASTContext 2571 TemplateArgument *CanonArgs = new TemplateArgument[Arg.pack_size()]; 2572 unsigned Idx = 0; 2573 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2574 AEnd = Arg.pack_end(); 2575 A != AEnd; (void)++A, ++Idx) 2576 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2577 2578 TemplateArgument Result; 2579 Result.setArgumentPack(CanonArgs, Arg.pack_size(), false); 2580 return Result; 2581 } 2582 } 2583 2584 // Silence GCC warning 2585 assert(false && "Unhandled template argument kind"); 2586 return TemplateArgument(); 2587} 2588 2589NestedNameSpecifier * 2590ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2591 if (!NNS) 2592 return 0; 2593 2594 switch (NNS->getKind()) { 2595 case NestedNameSpecifier::Identifier: 2596 // Canonicalize the prefix but keep the identifier the same. 2597 return NestedNameSpecifier::Create(*this, 2598 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2599 NNS->getAsIdentifier()); 2600 2601 case NestedNameSpecifier::Namespace: 2602 // A namespace is canonical; build a nested-name-specifier with 2603 // this namespace and no prefix. 2604 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2605 2606 case NestedNameSpecifier::TypeSpec: 2607 case NestedNameSpecifier::TypeSpecWithTemplate: { 2608 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2609 return NestedNameSpecifier::Create(*this, 0, 2610 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2611 T.getTypePtr()); 2612 } 2613 2614 case NestedNameSpecifier::Global: 2615 // The global specifier is canonical and unique. 2616 return NNS; 2617 } 2618 2619 // Required to silence a GCC warning 2620 return 0; 2621} 2622 2623 2624const ArrayType *ASTContext::getAsArrayType(QualType T) { 2625 // Handle the non-qualified case efficiently. 2626 if (!T.hasLocalQualifiers()) { 2627 // Handle the common positive case fast. 2628 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2629 return AT; 2630 } 2631 2632 // Handle the common negative case fast. 2633 QualType CType = T->getCanonicalTypeInternal(); 2634 if (!isa<ArrayType>(CType)) 2635 return 0; 2636 2637 // Apply any qualifiers from the array type to the element type. This 2638 // implements C99 6.7.3p8: "If the specification of an array type includes 2639 // any type qualifiers, the element type is so qualified, not the array type." 2640 2641 // If we get here, we either have type qualifiers on the type, or we have 2642 // sugar such as a typedef in the way. If we have type qualifiers on the type 2643 // we must propagate them down into the element type. 2644 2645 QualifierCollector Qs; 2646 const Type *Ty = Qs.strip(T.getDesugaredType()); 2647 2648 // If we have a simple case, just return now. 2649 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2650 if (ATy == 0 || Qs.empty()) 2651 return ATy; 2652 2653 // Otherwise, we have an array and we have qualifiers on it. Push the 2654 // qualifiers into the array element type and return a new array type. 2655 // Get the canonical version of the element with the extra qualifiers on it. 2656 // This can recursively sink qualifiers through multiple levels of arrays. 2657 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2658 2659 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2660 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2661 CAT->getSizeModifier(), 2662 CAT->getIndexTypeCVRQualifiers())); 2663 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2664 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2665 IAT->getSizeModifier(), 2666 IAT->getIndexTypeCVRQualifiers())); 2667 2668 if (const DependentSizedArrayType *DSAT 2669 = dyn_cast<DependentSizedArrayType>(ATy)) 2670 return cast<ArrayType>( 2671 getDependentSizedArrayType(NewEltTy, 2672 DSAT->getSizeExpr() ? 2673 DSAT->getSizeExpr()->Retain() : 0, 2674 DSAT->getSizeModifier(), 2675 DSAT->getIndexTypeCVRQualifiers(), 2676 DSAT->getBracketsRange())); 2677 2678 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2679 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2680 VAT->getSizeExpr() ? 2681 VAT->getSizeExpr()->Retain() : 0, 2682 VAT->getSizeModifier(), 2683 VAT->getIndexTypeCVRQualifiers(), 2684 VAT->getBracketsRange())); 2685} 2686 2687 2688/// getArrayDecayedType - Return the properly qualified result of decaying the 2689/// specified array type to a pointer. This operation is non-trivial when 2690/// handling typedefs etc. The canonical type of "T" must be an array type, 2691/// this returns a pointer to a properly qualified element of the array. 2692/// 2693/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2694QualType ASTContext::getArrayDecayedType(QualType Ty) { 2695 // Get the element type with 'getAsArrayType' so that we don't lose any 2696 // typedefs in the element type of the array. This also handles propagation 2697 // of type qualifiers from the array type into the element type if present 2698 // (C99 6.7.3p8). 2699 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2700 assert(PrettyArrayType && "Not an array type!"); 2701 2702 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2703 2704 // int x[restrict 4] -> int *restrict 2705 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2706} 2707 2708QualType ASTContext::getBaseElementType(QualType QT) { 2709 QualifierCollector Qs; 2710 while (const ArrayType *AT = getAsArrayType(QualType(Qs.strip(QT), 0))) 2711 QT = AT->getElementType(); 2712 return Qs.apply(QT); 2713} 2714 2715QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2716 QualType ElemTy = AT->getElementType(); 2717 2718 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2719 return getBaseElementType(AT); 2720 2721 return ElemTy; 2722} 2723 2724/// getConstantArrayElementCount - Returns number of constant array elements. 2725uint64_t 2726ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2727 uint64_t ElementCount = 1; 2728 do { 2729 ElementCount *= CA->getSize().getZExtValue(); 2730 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2731 } while (CA); 2732 return ElementCount; 2733} 2734 2735/// getFloatingRank - Return a relative rank for floating point types. 2736/// This routine will assert if passed a built-in type that isn't a float. 2737static FloatingRank getFloatingRank(QualType T) { 2738 if (const ComplexType *CT = T->getAs<ComplexType>()) 2739 return getFloatingRank(CT->getElementType()); 2740 2741 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2742 switch (T->getAs<BuiltinType>()->getKind()) { 2743 default: assert(0 && "getFloatingRank(): not a floating type"); 2744 case BuiltinType::Float: return FloatRank; 2745 case BuiltinType::Double: return DoubleRank; 2746 case BuiltinType::LongDouble: return LongDoubleRank; 2747 } 2748} 2749 2750/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2751/// point or a complex type (based on typeDomain/typeSize). 2752/// 'typeDomain' is a real floating point or complex type. 2753/// 'typeSize' is a real floating point or complex type. 2754QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2755 QualType Domain) const { 2756 FloatingRank EltRank = getFloatingRank(Size); 2757 if (Domain->isComplexType()) { 2758 switch (EltRank) { 2759 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2760 case FloatRank: return FloatComplexTy; 2761 case DoubleRank: return DoubleComplexTy; 2762 case LongDoubleRank: return LongDoubleComplexTy; 2763 } 2764 } 2765 2766 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2767 switch (EltRank) { 2768 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2769 case FloatRank: return FloatTy; 2770 case DoubleRank: return DoubleTy; 2771 case LongDoubleRank: return LongDoubleTy; 2772 } 2773} 2774 2775/// getFloatingTypeOrder - Compare the rank of the two specified floating 2776/// point types, ignoring the domain of the type (i.e. 'double' == 2777/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2778/// LHS < RHS, return -1. 2779int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2780 FloatingRank LHSR = getFloatingRank(LHS); 2781 FloatingRank RHSR = getFloatingRank(RHS); 2782 2783 if (LHSR == RHSR) 2784 return 0; 2785 if (LHSR > RHSR) 2786 return 1; 2787 return -1; 2788} 2789 2790/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2791/// routine will assert if passed a built-in type that isn't an integer or enum, 2792/// or if it is not canonicalized. 2793unsigned ASTContext::getIntegerRank(Type *T) { 2794 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2795 if (EnumType* ET = dyn_cast<EnumType>(T)) 2796 T = ET->getDecl()->getPromotionType().getTypePtr(); 2797 2798 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2799 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2800 2801 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2802 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2803 2804 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2805 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2806 2807 switch (cast<BuiltinType>(T)->getKind()) { 2808 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2809 case BuiltinType::Bool: 2810 return 1 + (getIntWidth(BoolTy) << 3); 2811 case BuiltinType::Char_S: 2812 case BuiltinType::Char_U: 2813 case BuiltinType::SChar: 2814 case BuiltinType::UChar: 2815 return 2 + (getIntWidth(CharTy) << 3); 2816 case BuiltinType::Short: 2817 case BuiltinType::UShort: 2818 return 3 + (getIntWidth(ShortTy) << 3); 2819 case BuiltinType::Int: 2820 case BuiltinType::UInt: 2821 return 4 + (getIntWidth(IntTy) << 3); 2822 case BuiltinType::Long: 2823 case BuiltinType::ULong: 2824 return 5 + (getIntWidth(LongTy) << 3); 2825 case BuiltinType::LongLong: 2826 case BuiltinType::ULongLong: 2827 return 6 + (getIntWidth(LongLongTy) << 3); 2828 case BuiltinType::Int128: 2829 case BuiltinType::UInt128: 2830 return 7 + (getIntWidth(Int128Ty) << 3); 2831 } 2832} 2833 2834/// \brief Whether this is a promotable bitfield reference according 2835/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 2836/// 2837/// \returns the type this bit-field will promote to, or NULL if no 2838/// promotion occurs. 2839QualType ASTContext::isPromotableBitField(Expr *E) { 2840 if (E->isTypeDependent() || E->isValueDependent()) 2841 return QualType(); 2842 2843 FieldDecl *Field = E->getBitField(); 2844 if (!Field) 2845 return QualType(); 2846 2847 QualType FT = Field->getType(); 2848 2849 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 2850 uint64_t BitWidth = BitWidthAP.getZExtValue(); 2851 uint64_t IntSize = getTypeSize(IntTy); 2852 // GCC extension compatibility: if the bit-field size is less than or equal 2853 // to the size of int, it gets promoted no matter what its type is. 2854 // For instance, unsigned long bf : 4 gets promoted to signed int. 2855 if (BitWidth < IntSize) 2856 return IntTy; 2857 2858 if (BitWidth == IntSize) 2859 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 2860 2861 // Types bigger than int are not subject to promotions, and therefore act 2862 // like the base type. 2863 // FIXME: This doesn't quite match what gcc does, but what gcc does here 2864 // is ridiculous. 2865 return QualType(); 2866} 2867 2868/// getPromotedIntegerType - Returns the type that Promotable will 2869/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 2870/// integer type. 2871QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 2872 assert(!Promotable.isNull()); 2873 assert(Promotable->isPromotableIntegerType()); 2874 if (const EnumType *ET = Promotable->getAs<EnumType>()) 2875 return ET->getDecl()->getPromotionType(); 2876 if (Promotable->isSignedIntegerType()) 2877 return IntTy; 2878 uint64_t PromotableSize = getTypeSize(Promotable); 2879 uint64_t IntSize = getTypeSize(IntTy); 2880 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 2881 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 2882} 2883 2884/// getIntegerTypeOrder - Returns the highest ranked integer type: 2885/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2886/// LHS < RHS, return -1. 2887int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2888 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2889 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2890 if (LHSC == RHSC) return 0; 2891 2892 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2893 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2894 2895 unsigned LHSRank = getIntegerRank(LHSC); 2896 unsigned RHSRank = getIntegerRank(RHSC); 2897 2898 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2899 if (LHSRank == RHSRank) return 0; 2900 return LHSRank > RHSRank ? 1 : -1; 2901 } 2902 2903 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2904 if (LHSUnsigned) { 2905 // If the unsigned [LHS] type is larger, return it. 2906 if (LHSRank >= RHSRank) 2907 return 1; 2908 2909 // If the signed type can represent all values of the unsigned type, it 2910 // wins. Because we are dealing with 2's complement and types that are 2911 // powers of two larger than each other, this is always safe. 2912 return -1; 2913 } 2914 2915 // If the unsigned [RHS] type is larger, return it. 2916 if (RHSRank >= LHSRank) 2917 return -1; 2918 2919 // If the signed type can represent all values of the unsigned type, it 2920 // wins. Because we are dealing with 2's complement and types that are 2921 // powers of two larger than each other, this is always safe. 2922 return 1; 2923} 2924 2925static RecordDecl * 2926CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 2927 SourceLocation L, IdentifierInfo *Id) { 2928 if (Ctx.getLangOptions().CPlusPlus) 2929 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 2930 else 2931 return RecordDecl::Create(Ctx, TK, DC, L, Id); 2932} 2933 2934// getCFConstantStringType - Return the type used for constant CFStrings. 2935QualType ASTContext::getCFConstantStringType() { 2936 if (!CFConstantStringTypeDecl) { 2937 CFConstantStringTypeDecl = 2938 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2939 &Idents.get("NSConstantString")); 2940 CFConstantStringTypeDecl->startDefinition(); 2941 2942 QualType FieldTypes[4]; 2943 2944 // const int *isa; 2945 FieldTypes[0] = getPointerType(IntTy.withConst()); 2946 // int flags; 2947 FieldTypes[1] = IntTy; 2948 // const char *str; 2949 FieldTypes[2] = getPointerType(CharTy.withConst()); 2950 // long length; 2951 FieldTypes[3] = LongTy; 2952 2953 // Create fields 2954 for (unsigned i = 0; i < 4; ++i) { 2955 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2956 SourceLocation(), 0, 2957 FieldTypes[i], /*TInfo=*/0, 2958 /*BitWidth=*/0, 2959 /*Mutable=*/false); 2960 Field->setAccess(AS_public); 2961 CFConstantStringTypeDecl->addDecl(Field); 2962 } 2963 2964 CFConstantStringTypeDecl->completeDefinition(); 2965 } 2966 2967 return getTagDeclType(CFConstantStringTypeDecl); 2968} 2969 2970void ASTContext::setCFConstantStringType(QualType T) { 2971 const RecordType *Rec = T->getAs<RecordType>(); 2972 assert(Rec && "Invalid CFConstantStringType"); 2973 CFConstantStringTypeDecl = Rec->getDecl(); 2974} 2975 2976// getNSConstantStringType - Return the type used for constant NSStrings. 2977QualType ASTContext::getNSConstantStringType() { 2978 if (!NSConstantStringTypeDecl) { 2979 NSConstantStringTypeDecl = 2980 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2981 &Idents.get("__builtin_NSString")); 2982 NSConstantStringTypeDecl->startDefinition(); 2983 2984 QualType FieldTypes[3]; 2985 2986 // const int *isa; 2987 FieldTypes[0] = getPointerType(IntTy.withConst()); 2988 // const char *str; 2989 FieldTypes[1] = getPointerType(CharTy.withConst()); 2990 // unsigned int length; 2991 FieldTypes[2] = UnsignedIntTy; 2992 2993 // Create fields 2994 for (unsigned i = 0; i < 3; ++i) { 2995 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 2996 SourceLocation(), 0, 2997 FieldTypes[i], /*TInfo=*/0, 2998 /*BitWidth=*/0, 2999 /*Mutable=*/false); 3000 Field->setAccess(AS_public); 3001 NSConstantStringTypeDecl->addDecl(Field); 3002 } 3003 3004 NSConstantStringTypeDecl->completeDefinition(); 3005 } 3006 3007 return getTagDeclType(NSConstantStringTypeDecl); 3008} 3009 3010void ASTContext::setNSConstantStringType(QualType T) { 3011 const RecordType *Rec = T->getAs<RecordType>(); 3012 assert(Rec && "Invalid NSConstantStringType"); 3013 NSConstantStringTypeDecl = Rec->getDecl(); 3014} 3015 3016QualType ASTContext::getObjCFastEnumerationStateType() { 3017 if (!ObjCFastEnumerationStateTypeDecl) { 3018 ObjCFastEnumerationStateTypeDecl = 3019 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3020 &Idents.get("__objcFastEnumerationState")); 3021 ObjCFastEnumerationStateTypeDecl->startDefinition(); 3022 3023 QualType FieldTypes[] = { 3024 UnsignedLongTy, 3025 getPointerType(ObjCIdTypedefType), 3026 getPointerType(UnsignedLongTy), 3027 getConstantArrayType(UnsignedLongTy, 3028 llvm::APInt(32, 5), ArrayType::Normal, 0) 3029 }; 3030 3031 for (size_t i = 0; i < 4; ++i) { 3032 FieldDecl *Field = FieldDecl::Create(*this, 3033 ObjCFastEnumerationStateTypeDecl, 3034 SourceLocation(), 0, 3035 FieldTypes[i], /*TInfo=*/0, 3036 /*BitWidth=*/0, 3037 /*Mutable=*/false); 3038 Field->setAccess(AS_public); 3039 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 3040 } 3041 if (getLangOptions().CPlusPlus) 3042 if (CXXRecordDecl *CXXRD = 3043 dyn_cast<CXXRecordDecl>(ObjCFastEnumerationStateTypeDecl)) 3044 CXXRD->setEmpty(false); 3045 3046 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 3047 } 3048 3049 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 3050} 3051 3052QualType ASTContext::getBlockDescriptorType() { 3053 if (BlockDescriptorType) 3054 return getTagDeclType(BlockDescriptorType); 3055 3056 RecordDecl *T; 3057 // FIXME: Needs the FlagAppleBlock bit. 3058 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3059 &Idents.get("__block_descriptor")); 3060 T->startDefinition(); 3061 3062 QualType FieldTypes[] = { 3063 UnsignedLongTy, 3064 UnsignedLongTy, 3065 }; 3066 3067 const char *FieldNames[] = { 3068 "reserved", 3069 "Size" 3070 }; 3071 3072 for (size_t i = 0; i < 2; ++i) { 3073 FieldDecl *Field = FieldDecl::Create(*this, 3074 T, 3075 SourceLocation(), 3076 &Idents.get(FieldNames[i]), 3077 FieldTypes[i], /*TInfo=*/0, 3078 /*BitWidth=*/0, 3079 /*Mutable=*/false); 3080 Field->setAccess(AS_public); 3081 T->addDecl(Field); 3082 } 3083 3084 T->completeDefinition(); 3085 3086 BlockDescriptorType = T; 3087 3088 return getTagDeclType(BlockDescriptorType); 3089} 3090 3091void ASTContext::setBlockDescriptorType(QualType T) { 3092 const RecordType *Rec = T->getAs<RecordType>(); 3093 assert(Rec && "Invalid BlockDescriptorType"); 3094 BlockDescriptorType = Rec->getDecl(); 3095} 3096 3097QualType ASTContext::getBlockDescriptorExtendedType() { 3098 if (BlockDescriptorExtendedType) 3099 return getTagDeclType(BlockDescriptorExtendedType); 3100 3101 RecordDecl *T; 3102 // FIXME: Needs the FlagAppleBlock bit. 3103 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3104 &Idents.get("__block_descriptor_withcopydispose")); 3105 T->startDefinition(); 3106 3107 QualType FieldTypes[] = { 3108 UnsignedLongTy, 3109 UnsignedLongTy, 3110 getPointerType(VoidPtrTy), 3111 getPointerType(VoidPtrTy) 3112 }; 3113 3114 const char *FieldNames[] = { 3115 "reserved", 3116 "Size", 3117 "CopyFuncPtr", 3118 "DestroyFuncPtr" 3119 }; 3120 3121 for (size_t i = 0; i < 4; ++i) { 3122 FieldDecl *Field = FieldDecl::Create(*this, 3123 T, 3124 SourceLocation(), 3125 &Idents.get(FieldNames[i]), 3126 FieldTypes[i], /*TInfo=*/0, 3127 /*BitWidth=*/0, 3128 /*Mutable=*/false); 3129 Field->setAccess(AS_public); 3130 T->addDecl(Field); 3131 } 3132 3133 T->completeDefinition(); 3134 3135 BlockDescriptorExtendedType = T; 3136 3137 return getTagDeclType(BlockDescriptorExtendedType); 3138} 3139 3140void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3141 const RecordType *Rec = T->getAs<RecordType>(); 3142 assert(Rec && "Invalid BlockDescriptorType"); 3143 BlockDescriptorExtendedType = Rec->getDecl(); 3144} 3145 3146bool ASTContext::BlockRequiresCopying(QualType Ty) { 3147 if (Ty->isBlockPointerType()) 3148 return true; 3149 if (isObjCNSObjectType(Ty)) 3150 return true; 3151 if (Ty->isObjCObjectPointerType()) 3152 return true; 3153 return false; 3154} 3155 3156QualType ASTContext::BuildByRefType(const char *DeclName, QualType Ty) { 3157 // type = struct __Block_byref_1_X { 3158 // void *__isa; 3159 // struct __Block_byref_1_X *__forwarding; 3160 // unsigned int __flags; 3161 // unsigned int __size; 3162 // void *__copy_helper; // as needed 3163 // void *__destroy_help // as needed 3164 // int X; 3165 // } * 3166 3167 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3168 3169 // FIXME: Move up 3170 llvm::SmallString<36> Name; 3171 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3172 ++UniqueBlockByRefTypeID << '_' << DeclName; 3173 RecordDecl *T; 3174 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3175 &Idents.get(Name.str())); 3176 T->startDefinition(); 3177 QualType Int32Ty = IntTy; 3178 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3179 QualType FieldTypes[] = { 3180 getPointerType(VoidPtrTy), 3181 getPointerType(getTagDeclType(T)), 3182 Int32Ty, 3183 Int32Ty, 3184 getPointerType(VoidPtrTy), 3185 getPointerType(VoidPtrTy), 3186 Ty 3187 }; 3188 3189 const char *FieldNames[] = { 3190 "__isa", 3191 "__forwarding", 3192 "__flags", 3193 "__size", 3194 "__copy_helper", 3195 "__destroy_helper", 3196 DeclName, 3197 }; 3198 3199 for (size_t i = 0; i < 7; ++i) { 3200 if (!HasCopyAndDispose && i >=4 && i <= 5) 3201 continue; 3202 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3203 &Idents.get(FieldNames[i]), 3204 FieldTypes[i], /*TInfo=*/0, 3205 /*BitWidth=*/0, /*Mutable=*/false); 3206 Field->setAccess(AS_public); 3207 T->addDecl(Field); 3208 } 3209 3210 T->completeDefinition(); 3211 3212 return getPointerType(getTagDeclType(T)); 3213} 3214 3215 3216QualType ASTContext::getBlockParmType( 3217 bool BlockHasCopyDispose, 3218 llvm::SmallVectorImpl<const Expr *> &Layout) { 3219 3220 // FIXME: Move up 3221 llvm::SmallString<36> Name; 3222 llvm::raw_svector_ostream(Name) << "__block_literal_" 3223 << ++UniqueBlockParmTypeID; 3224 RecordDecl *T; 3225 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3226 &Idents.get(Name.str())); 3227 T->startDefinition(); 3228 QualType FieldTypes[] = { 3229 getPointerType(VoidPtrTy), 3230 IntTy, 3231 IntTy, 3232 getPointerType(VoidPtrTy), 3233 (BlockHasCopyDispose ? 3234 getPointerType(getBlockDescriptorExtendedType()) : 3235 getPointerType(getBlockDescriptorType())) 3236 }; 3237 3238 const char *FieldNames[] = { 3239 "__isa", 3240 "__flags", 3241 "__reserved", 3242 "__FuncPtr", 3243 "__descriptor" 3244 }; 3245 3246 for (size_t i = 0; i < 5; ++i) { 3247 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3248 &Idents.get(FieldNames[i]), 3249 FieldTypes[i], /*TInfo=*/0, 3250 /*BitWidth=*/0, /*Mutable=*/false); 3251 Field->setAccess(AS_public); 3252 T->addDecl(Field); 3253 } 3254 3255 for (unsigned i = 0; i < Layout.size(); ++i) { 3256 const Expr *E = Layout[i]; 3257 3258 QualType FieldType = E->getType(); 3259 IdentifierInfo *FieldName = 0; 3260 if (isa<CXXThisExpr>(E)) { 3261 FieldName = &Idents.get("this"); 3262 } else if (const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E)) { 3263 const ValueDecl *D = BDRE->getDecl(); 3264 FieldName = D->getIdentifier(); 3265 if (BDRE->isByRef()) 3266 FieldType = BuildByRefType(D->getNameAsCString(), FieldType); 3267 } else { 3268 // Padding. 3269 assert(isa<ConstantArrayType>(FieldType) && 3270 isa<DeclRefExpr>(E) && 3271 !cast<DeclRefExpr>(E)->getDecl()->getDeclName() && 3272 "doesn't match characteristics of padding decl"); 3273 } 3274 3275 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3276 FieldName, FieldType, /*TInfo=*/0, 3277 /*BitWidth=*/0, /*Mutable=*/false); 3278 Field->setAccess(AS_public); 3279 T->addDecl(Field); 3280 } 3281 3282 T->completeDefinition(); 3283 3284 return getPointerType(getTagDeclType(T)); 3285} 3286 3287void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3288 const RecordType *Rec = T->getAs<RecordType>(); 3289 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3290 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3291} 3292 3293// This returns true if a type has been typedefed to BOOL: 3294// typedef <type> BOOL; 3295static bool isTypeTypedefedAsBOOL(QualType T) { 3296 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3297 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3298 return II->isStr("BOOL"); 3299 3300 return false; 3301} 3302 3303/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3304/// purpose. 3305CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) { 3306 CharUnits sz = getTypeSizeInChars(type); 3307 3308 // Make all integer and enum types at least as large as an int 3309 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 3310 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3311 // Treat arrays as pointers, since that's how they're passed in. 3312 else if (type->isArrayType()) 3313 sz = getTypeSizeInChars(VoidPtrTy); 3314 return sz; 3315} 3316 3317static inline 3318std::string charUnitsToString(const CharUnits &CU) { 3319 return llvm::itostr(CU.getQuantity()); 3320} 3321 3322/// getObjCEncodingForBlockDecl - Return the encoded type for this block 3323/// declaration. 3324void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3325 std::string& S) { 3326 const BlockDecl *Decl = Expr->getBlockDecl(); 3327 QualType BlockTy = 3328 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3329 // Encode result type. 3330 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3331 // Compute size of all parameters. 3332 // Start with computing size of a pointer in number of bytes. 3333 // FIXME: There might(should) be a better way of doing this computation! 3334 SourceLocation Loc; 3335 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3336 CharUnits ParmOffset = PtrSize; 3337 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3338 E = Decl->param_end(); PI != E; ++PI) { 3339 QualType PType = (*PI)->getType(); 3340 CharUnits sz = getObjCEncodingTypeSize(PType); 3341 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3342 ParmOffset += sz; 3343 } 3344 // Size of the argument frame 3345 S += charUnitsToString(ParmOffset); 3346 // Block pointer and offset. 3347 S += "@?0"; 3348 ParmOffset = PtrSize; 3349 3350 // Argument types. 3351 ParmOffset = PtrSize; 3352 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3353 Decl->param_end(); PI != E; ++PI) { 3354 ParmVarDecl *PVDecl = *PI; 3355 QualType PType = PVDecl->getOriginalType(); 3356 if (const ArrayType *AT = 3357 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3358 // Use array's original type only if it has known number of 3359 // elements. 3360 if (!isa<ConstantArrayType>(AT)) 3361 PType = PVDecl->getType(); 3362 } else if (PType->isFunctionType()) 3363 PType = PVDecl->getType(); 3364 getObjCEncodingForType(PType, S); 3365 S += charUnitsToString(ParmOffset); 3366 ParmOffset += getObjCEncodingTypeSize(PType); 3367 } 3368} 3369 3370/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3371/// declaration. 3372void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3373 std::string& S) { 3374 // FIXME: This is not very efficient. 3375 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3376 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3377 // Encode result type. 3378 getObjCEncodingForType(Decl->getResultType(), S); 3379 // Compute size of all parameters. 3380 // Start with computing size of a pointer in number of bytes. 3381 // FIXME: There might(should) be a better way of doing this computation! 3382 SourceLocation Loc; 3383 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3384 // The first two arguments (self and _cmd) are pointers; account for 3385 // their size. 3386 CharUnits ParmOffset = 2 * PtrSize; 3387 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3388 E = Decl->sel_param_end(); PI != E; ++PI) { 3389 QualType PType = (*PI)->getType(); 3390 CharUnits sz = getObjCEncodingTypeSize(PType); 3391 assert (sz.isPositive() && 3392 "getObjCEncodingForMethodDecl - Incomplete param type"); 3393 ParmOffset += sz; 3394 } 3395 S += charUnitsToString(ParmOffset); 3396 S += "@0:"; 3397 S += charUnitsToString(PtrSize); 3398 3399 // Argument types. 3400 ParmOffset = 2 * PtrSize; 3401 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3402 E = Decl->sel_param_end(); PI != E; ++PI) { 3403 ParmVarDecl *PVDecl = *PI; 3404 QualType PType = PVDecl->getOriginalType(); 3405 if (const ArrayType *AT = 3406 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3407 // Use array's original type only if it has known number of 3408 // elements. 3409 if (!isa<ConstantArrayType>(AT)) 3410 PType = PVDecl->getType(); 3411 } else if (PType->isFunctionType()) 3412 PType = PVDecl->getType(); 3413 // Process argument qualifiers for user supplied arguments; such as, 3414 // 'in', 'inout', etc. 3415 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3416 getObjCEncodingForType(PType, S); 3417 S += charUnitsToString(ParmOffset); 3418 ParmOffset += getObjCEncodingTypeSize(PType); 3419 } 3420} 3421 3422/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3423/// property declaration. If non-NULL, Container must be either an 3424/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3425/// NULL when getting encodings for protocol properties. 3426/// Property attributes are stored as a comma-delimited C string. The simple 3427/// attributes readonly and bycopy are encoded as single characters. The 3428/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3429/// encoded as single characters, followed by an identifier. Property types 3430/// are also encoded as a parametrized attribute. The characters used to encode 3431/// these attributes are defined by the following enumeration: 3432/// @code 3433/// enum PropertyAttributes { 3434/// kPropertyReadOnly = 'R', // property is read-only. 3435/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3436/// kPropertyByref = '&', // property is a reference to the value last assigned 3437/// kPropertyDynamic = 'D', // property is dynamic 3438/// kPropertyGetter = 'G', // followed by getter selector name 3439/// kPropertySetter = 'S', // followed by setter selector name 3440/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3441/// kPropertyType = 't' // followed by old-style type encoding. 3442/// kPropertyWeak = 'W' // 'weak' property 3443/// kPropertyStrong = 'P' // property GC'able 3444/// kPropertyNonAtomic = 'N' // property non-atomic 3445/// }; 3446/// @endcode 3447void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3448 const Decl *Container, 3449 std::string& S) { 3450 // Collect information from the property implementation decl(s). 3451 bool Dynamic = false; 3452 ObjCPropertyImplDecl *SynthesizePID = 0; 3453 3454 // FIXME: Duplicated code due to poor abstraction. 3455 if (Container) { 3456 if (const ObjCCategoryImplDecl *CID = 3457 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3458 for (ObjCCategoryImplDecl::propimpl_iterator 3459 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3460 i != e; ++i) { 3461 ObjCPropertyImplDecl *PID = *i; 3462 if (PID->getPropertyDecl() == PD) { 3463 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3464 Dynamic = true; 3465 } else { 3466 SynthesizePID = PID; 3467 } 3468 } 3469 } 3470 } else { 3471 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3472 for (ObjCCategoryImplDecl::propimpl_iterator 3473 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3474 i != e; ++i) { 3475 ObjCPropertyImplDecl *PID = *i; 3476 if (PID->getPropertyDecl() == PD) { 3477 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3478 Dynamic = true; 3479 } else { 3480 SynthesizePID = PID; 3481 } 3482 } 3483 } 3484 } 3485 } 3486 3487 // FIXME: This is not very efficient. 3488 S = "T"; 3489 3490 // Encode result type. 3491 // GCC has some special rules regarding encoding of properties which 3492 // closely resembles encoding of ivars. 3493 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3494 true /* outermost type */, 3495 true /* encoding for property */); 3496 3497 if (PD->isReadOnly()) { 3498 S += ",R"; 3499 } else { 3500 switch (PD->getSetterKind()) { 3501 case ObjCPropertyDecl::Assign: break; 3502 case ObjCPropertyDecl::Copy: S += ",C"; break; 3503 case ObjCPropertyDecl::Retain: S += ",&"; break; 3504 } 3505 } 3506 3507 // It really isn't clear at all what this means, since properties 3508 // are "dynamic by default". 3509 if (Dynamic) 3510 S += ",D"; 3511 3512 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3513 S += ",N"; 3514 3515 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3516 S += ",G"; 3517 S += PD->getGetterName().getAsString(); 3518 } 3519 3520 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3521 S += ",S"; 3522 S += PD->getSetterName().getAsString(); 3523 } 3524 3525 if (SynthesizePID) { 3526 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3527 S += ",V"; 3528 S += OID->getNameAsString(); 3529 } 3530 3531 // FIXME: OBJCGC: weak & strong 3532} 3533 3534/// getLegacyIntegralTypeEncoding - 3535/// Another legacy compatibility encoding: 32-bit longs are encoded as 3536/// 'l' or 'L' , but not always. For typedefs, we need to use 3537/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3538/// 3539void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3540 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3541 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3542 if (BT->getKind() == BuiltinType::ULong && 3543 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3544 PointeeTy = UnsignedIntTy; 3545 else 3546 if (BT->getKind() == BuiltinType::Long && 3547 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3548 PointeeTy = IntTy; 3549 } 3550 } 3551} 3552 3553void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3554 const FieldDecl *Field) { 3555 // We follow the behavior of gcc, expanding structures which are 3556 // directly pointed to, and expanding embedded structures. Note that 3557 // these rules are sufficient to prevent recursive encoding of the 3558 // same type. 3559 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3560 true /* outermost type */); 3561} 3562 3563static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 3564 switch (T->getAs<BuiltinType>()->getKind()) { 3565 default: assert(0 && "Unhandled builtin type kind"); 3566 case BuiltinType::Void: return 'v'; 3567 case BuiltinType::Bool: return 'B'; 3568 case BuiltinType::Char_U: 3569 case BuiltinType::UChar: return 'C'; 3570 case BuiltinType::UShort: return 'S'; 3571 case BuiltinType::UInt: return 'I'; 3572 case BuiltinType::ULong: 3573 return 3574 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3575 case BuiltinType::UInt128: return 'T'; 3576 case BuiltinType::ULongLong: return 'Q'; 3577 case BuiltinType::Char_S: 3578 case BuiltinType::SChar: return 'c'; 3579 case BuiltinType::Short: return 's'; 3580 case BuiltinType::WChar: 3581 case BuiltinType::Int: return 'i'; 3582 case BuiltinType::Long: 3583 return 3584 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'l' : 'q'; 3585 case BuiltinType::LongLong: return 'q'; 3586 case BuiltinType::Int128: return 't'; 3587 case BuiltinType::Float: return 'f'; 3588 case BuiltinType::Double: return 'd'; 3589 case BuiltinType::LongDouble: return 'd'; 3590 } 3591} 3592 3593static void EncodeBitField(const ASTContext *Context, std::string& S, 3594 QualType T, const FieldDecl *FD) { 3595 const Expr *E = FD->getBitWidth(); 3596 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3597 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3598 S += 'b'; 3599 // The NeXT runtime encodes bit fields as b followed by the number of bits. 3600 // The GNU runtime requires more information; bitfields are encoded as b, 3601 // then the offset (in bits) of the first element, then the type of the 3602 // bitfield, then the size in bits. For example, in this structure: 3603 // 3604 // struct 3605 // { 3606 // int integer; 3607 // int flags:2; 3608 // }; 3609 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 3610 // runtime, but b32i2 for the GNU runtime. The reason for this extra 3611 // information is not especially sensible, but we're stuck with it for 3612 // compatibility with GCC, although providing it breaks anything that 3613 // actually uses runtime introspection and wants to work on both runtimes... 3614 if (!Ctx->getLangOptions().NeXTRuntime) { 3615 const RecordDecl *RD = FD->getParent(); 3616 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 3617 // FIXME: This same linear search is also used in ExprConstant - it might 3618 // be better if the FieldDecl stored its offset. We'd be increasing the 3619 // size of the object slightly, but saving some time every time it is used. 3620 unsigned i = 0; 3621 for (RecordDecl::field_iterator Field = RD->field_begin(), 3622 FieldEnd = RD->field_end(); 3623 Field != FieldEnd; (void)++Field, ++i) { 3624 if (*Field == FD) 3625 break; 3626 } 3627 S += llvm::utostr(RL.getFieldOffset(i)); 3628 S += ObjCEncodingForPrimitiveKind(Context, T); 3629 } 3630 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3631 S += llvm::utostr(N); 3632} 3633 3634// FIXME: Use SmallString for accumulating string. 3635void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3636 bool ExpandPointedToStructures, 3637 bool ExpandStructures, 3638 const FieldDecl *FD, 3639 bool OutermostType, 3640 bool EncodingProperty) { 3641 if (T->getAs<BuiltinType>()) { 3642 if (FD && FD->isBitField()) 3643 return EncodeBitField(this, S, T, FD); 3644 S += ObjCEncodingForPrimitiveKind(this, T); 3645 return; 3646 } 3647 3648 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3649 S += 'j'; 3650 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3651 false); 3652 return; 3653 } 3654 3655 // encoding for pointer or r3eference types. 3656 QualType PointeeTy; 3657 if (const PointerType *PT = T->getAs<PointerType>()) { 3658 if (PT->isObjCSelType()) { 3659 S += ':'; 3660 return; 3661 } 3662 PointeeTy = PT->getPointeeType(); 3663 } 3664 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3665 PointeeTy = RT->getPointeeType(); 3666 if (!PointeeTy.isNull()) { 3667 bool isReadOnly = false; 3668 // For historical/compatibility reasons, the read-only qualifier of the 3669 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3670 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3671 // Also, do not emit the 'r' for anything but the outermost type! 3672 if (isa<TypedefType>(T.getTypePtr())) { 3673 if (OutermostType && T.isConstQualified()) { 3674 isReadOnly = true; 3675 S += 'r'; 3676 } 3677 } else if (OutermostType) { 3678 QualType P = PointeeTy; 3679 while (P->getAs<PointerType>()) 3680 P = P->getAs<PointerType>()->getPointeeType(); 3681 if (P.isConstQualified()) { 3682 isReadOnly = true; 3683 S += 'r'; 3684 } 3685 } 3686 if (isReadOnly) { 3687 // Another legacy compatibility encoding. Some ObjC qualifier and type 3688 // combinations need to be rearranged. 3689 // Rewrite "in const" from "nr" to "rn" 3690 if (llvm::StringRef(S).endswith("nr")) 3691 S.replace(S.end()-2, S.end(), "rn"); 3692 } 3693 3694 if (PointeeTy->isCharType()) { 3695 // char pointer types should be encoded as '*' unless it is a 3696 // type that has been typedef'd to 'BOOL'. 3697 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3698 S += '*'; 3699 return; 3700 } 3701 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3702 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3703 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3704 S += '#'; 3705 return; 3706 } 3707 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3708 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3709 S += '@'; 3710 return; 3711 } 3712 // fall through... 3713 } 3714 S += '^'; 3715 getLegacyIntegralTypeEncoding(PointeeTy); 3716 3717 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3718 NULL); 3719 return; 3720 } 3721 3722 if (const ArrayType *AT = 3723 // Ignore type qualifiers etc. 3724 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3725 if (isa<IncompleteArrayType>(AT)) { 3726 // Incomplete arrays are encoded as a pointer to the array element. 3727 S += '^'; 3728 3729 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3730 false, ExpandStructures, FD); 3731 } else { 3732 S += '['; 3733 3734 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3735 S += llvm::utostr(CAT->getSize().getZExtValue()); 3736 else { 3737 //Variable length arrays are encoded as a regular array with 0 elements. 3738 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3739 S += '0'; 3740 } 3741 3742 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3743 false, ExpandStructures, FD); 3744 S += ']'; 3745 } 3746 return; 3747 } 3748 3749 if (T->getAs<FunctionType>()) { 3750 S += '?'; 3751 return; 3752 } 3753 3754 if (const RecordType *RTy = T->getAs<RecordType>()) { 3755 RecordDecl *RDecl = RTy->getDecl(); 3756 S += RDecl->isUnion() ? '(' : '{'; 3757 // Anonymous structures print as '?' 3758 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3759 S += II->getName(); 3760 if (ClassTemplateSpecializationDecl *Spec 3761 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 3762 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 3763 std::string TemplateArgsStr 3764 = TemplateSpecializationType::PrintTemplateArgumentList( 3765 TemplateArgs.getFlatArgumentList(), 3766 TemplateArgs.flat_size(), 3767 (*this).PrintingPolicy); 3768 3769 S += TemplateArgsStr; 3770 } 3771 } else { 3772 S += '?'; 3773 } 3774 if (ExpandStructures) { 3775 S += '='; 3776 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3777 FieldEnd = RDecl->field_end(); 3778 Field != FieldEnd; ++Field) { 3779 if (FD) { 3780 S += '"'; 3781 S += Field->getNameAsString(); 3782 S += '"'; 3783 } 3784 3785 // Special case bit-fields. 3786 if (Field->isBitField()) { 3787 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3788 (*Field)); 3789 } else { 3790 QualType qt = Field->getType(); 3791 getLegacyIntegralTypeEncoding(qt); 3792 getObjCEncodingForTypeImpl(qt, S, false, true, 3793 FD); 3794 } 3795 } 3796 } 3797 S += RDecl->isUnion() ? ')' : '}'; 3798 return; 3799 } 3800 3801 if (T->isEnumeralType()) { 3802 if (FD && FD->isBitField()) 3803 EncodeBitField(this, S, T, FD); 3804 else 3805 S += 'i'; 3806 return; 3807 } 3808 3809 if (T->isBlockPointerType()) { 3810 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3811 return; 3812 } 3813 3814 // Ignore protocol qualifiers when mangling at this level. 3815 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 3816 T = OT->getBaseType(); 3817 3818 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3819 // @encode(class_name) 3820 ObjCInterfaceDecl *OI = OIT->getDecl(); 3821 S += '{'; 3822 const IdentifierInfo *II = OI->getIdentifier(); 3823 S += II->getName(); 3824 S += '='; 3825 llvm::SmallVector<FieldDecl*, 32> RecFields; 3826 CollectObjCIvars(OI, RecFields); 3827 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 3828 if (RecFields[i]->isBitField()) 3829 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3830 RecFields[i]); 3831 else 3832 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3833 FD); 3834 } 3835 S += '}'; 3836 return; 3837 } 3838 3839 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 3840 if (OPT->isObjCIdType()) { 3841 S += '@'; 3842 return; 3843 } 3844 3845 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 3846 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 3847 // Since this is a binary compatibility issue, need to consult with runtime 3848 // folks. Fortunately, this is a *very* obsure construct. 3849 S += '#'; 3850 return; 3851 } 3852 3853 if (OPT->isObjCQualifiedIdType()) { 3854 getObjCEncodingForTypeImpl(getObjCIdType(), S, 3855 ExpandPointedToStructures, 3856 ExpandStructures, FD); 3857 if (FD || EncodingProperty) { 3858 // Note that we do extended encoding of protocol qualifer list 3859 // Only when doing ivar or property encoding. 3860 S += '"'; 3861 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3862 E = OPT->qual_end(); I != E; ++I) { 3863 S += '<'; 3864 S += (*I)->getNameAsString(); 3865 S += '>'; 3866 } 3867 S += '"'; 3868 } 3869 return; 3870 } 3871 3872 QualType PointeeTy = OPT->getPointeeType(); 3873 if (!EncodingProperty && 3874 isa<TypedefType>(PointeeTy.getTypePtr())) { 3875 // Another historical/compatibility reason. 3876 // We encode the underlying type which comes out as 3877 // {...}; 3878 S += '^'; 3879 getObjCEncodingForTypeImpl(PointeeTy, S, 3880 false, ExpandPointedToStructures, 3881 NULL); 3882 return; 3883 } 3884 3885 S += '@'; 3886 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 3887 S += '"'; 3888 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 3889 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3890 E = OPT->qual_end(); I != E; ++I) { 3891 S += '<'; 3892 S += (*I)->getNameAsString(); 3893 S += '>'; 3894 } 3895 S += '"'; 3896 } 3897 return; 3898 } 3899 3900 // gcc just blithely ignores member pointers. 3901 // TODO: maybe there should be a mangling for these 3902 if (T->getAs<MemberPointerType>()) 3903 return; 3904 3905 assert(0 && "@encode for type not implemented!"); 3906} 3907 3908void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 3909 std::string& S) const { 3910 if (QT & Decl::OBJC_TQ_In) 3911 S += 'n'; 3912 if (QT & Decl::OBJC_TQ_Inout) 3913 S += 'N'; 3914 if (QT & Decl::OBJC_TQ_Out) 3915 S += 'o'; 3916 if (QT & Decl::OBJC_TQ_Bycopy) 3917 S += 'O'; 3918 if (QT & Decl::OBJC_TQ_Byref) 3919 S += 'R'; 3920 if (QT & Decl::OBJC_TQ_Oneway) 3921 S += 'V'; 3922} 3923 3924void ASTContext::setBuiltinVaListType(QualType T) { 3925 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 3926 3927 BuiltinVaListType = T; 3928} 3929 3930void ASTContext::setObjCIdType(QualType T) { 3931 ObjCIdTypedefType = T; 3932} 3933 3934void ASTContext::setObjCSelType(QualType T) { 3935 ObjCSelTypedefType = T; 3936} 3937 3938void ASTContext::setObjCProtoType(QualType QT) { 3939 ObjCProtoType = QT; 3940} 3941 3942void ASTContext::setObjCClassType(QualType T) { 3943 ObjCClassTypedefType = T; 3944} 3945 3946void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 3947 assert(ObjCConstantStringType.isNull() && 3948 "'NSConstantString' type already set!"); 3949 3950 ObjCConstantStringType = getObjCInterfaceType(Decl); 3951} 3952 3953/// \brief Retrieve the template name that corresponds to a non-empty 3954/// lookup. 3955TemplateName ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 3956 UnresolvedSetIterator End) { 3957 unsigned size = End - Begin; 3958 assert(size > 1 && "set is not overloaded!"); 3959 3960 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 3961 size * sizeof(FunctionTemplateDecl*)); 3962 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 3963 3964 NamedDecl **Storage = OT->getStorage(); 3965 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 3966 NamedDecl *D = *I; 3967 assert(isa<FunctionTemplateDecl>(D) || 3968 (isa<UsingShadowDecl>(D) && 3969 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 3970 *Storage++ = D; 3971 } 3972 3973 return TemplateName(OT); 3974} 3975 3976/// \brief Retrieve the template name that represents a qualified 3977/// template name such as \c std::vector. 3978TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 3979 bool TemplateKeyword, 3980 TemplateDecl *Template) { 3981 // FIXME: Canonicalization? 3982 llvm::FoldingSetNodeID ID; 3983 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 3984 3985 void *InsertPos = 0; 3986 QualifiedTemplateName *QTN = 3987 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3988 if (!QTN) { 3989 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 3990 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 3991 } 3992 3993 return TemplateName(QTN); 3994} 3995 3996/// \brief Retrieve the template name that represents a dependent 3997/// template name such as \c MetaFun::template apply. 3998TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3999 const IdentifierInfo *Name) { 4000 assert((!NNS || NNS->isDependent()) && 4001 "Nested name specifier must be dependent"); 4002 4003 llvm::FoldingSetNodeID ID; 4004 DependentTemplateName::Profile(ID, NNS, Name); 4005 4006 void *InsertPos = 0; 4007 DependentTemplateName *QTN = 4008 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4009 4010 if (QTN) 4011 return TemplateName(QTN); 4012 4013 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4014 if (CanonNNS == NNS) { 4015 QTN = new (*this,4) DependentTemplateName(NNS, Name); 4016 } else { 4017 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 4018 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 4019 DependentTemplateName *CheckQTN = 4020 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4021 assert(!CheckQTN && "Dependent type name canonicalization broken"); 4022 (void)CheckQTN; 4023 } 4024 4025 DependentTemplateNames.InsertNode(QTN, InsertPos); 4026 return TemplateName(QTN); 4027} 4028 4029/// \brief Retrieve the template name that represents a dependent 4030/// template name such as \c MetaFun::template operator+. 4031TemplateName 4032ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4033 OverloadedOperatorKind Operator) { 4034 assert((!NNS || NNS->isDependent()) && 4035 "Nested name specifier must be dependent"); 4036 4037 llvm::FoldingSetNodeID ID; 4038 DependentTemplateName::Profile(ID, NNS, Operator); 4039 4040 void *InsertPos = 0; 4041 DependentTemplateName *QTN 4042 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4043 4044 if (QTN) 4045 return TemplateName(QTN); 4046 4047 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4048 if (CanonNNS == NNS) { 4049 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 4050 } else { 4051 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 4052 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 4053 4054 DependentTemplateName *CheckQTN 4055 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4056 assert(!CheckQTN && "Dependent template name canonicalization broken"); 4057 (void)CheckQTN; 4058 } 4059 4060 DependentTemplateNames.InsertNode(QTN, InsertPos); 4061 return TemplateName(QTN); 4062} 4063 4064/// getFromTargetType - Given one of the integer types provided by 4065/// TargetInfo, produce the corresponding type. The unsigned @p Type 4066/// is actually a value of type @c TargetInfo::IntType. 4067CanQualType ASTContext::getFromTargetType(unsigned Type) const { 4068 switch (Type) { 4069 case TargetInfo::NoInt: return CanQualType(); 4070 case TargetInfo::SignedShort: return ShortTy; 4071 case TargetInfo::UnsignedShort: return UnsignedShortTy; 4072 case TargetInfo::SignedInt: return IntTy; 4073 case TargetInfo::UnsignedInt: return UnsignedIntTy; 4074 case TargetInfo::SignedLong: return LongTy; 4075 case TargetInfo::UnsignedLong: return UnsignedLongTy; 4076 case TargetInfo::SignedLongLong: return LongLongTy; 4077 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 4078 } 4079 4080 assert(false && "Unhandled TargetInfo::IntType value"); 4081 return CanQualType(); 4082} 4083 4084//===----------------------------------------------------------------------===// 4085// Type Predicates. 4086//===----------------------------------------------------------------------===// 4087 4088/// isObjCNSObjectType - Return true if this is an NSObject object using 4089/// NSObject attribute on a c-style pointer type. 4090/// FIXME - Make it work directly on types. 4091/// FIXME: Move to Type. 4092/// 4093bool ASTContext::isObjCNSObjectType(QualType Ty) const { 4094 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 4095 if (TypedefDecl *TD = TDT->getDecl()) 4096 if (TD->getAttr<ObjCNSObjectAttr>()) 4097 return true; 4098 } 4099 return false; 4100} 4101 4102/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 4103/// garbage collection attribute. 4104/// 4105Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 4106 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 4107 if (getLangOptions().ObjC1 && 4108 getLangOptions().getGCMode() != LangOptions::NonGC) { 4109 GCAttrs = Ty.getObjCGCAttr(); 4110 // Default behavious under objective-c's gc is for objective-c pointers 4111 // (or pointers to them) be treated as though they were declared 4112 // as __strong. 4113 if (GCAttrs == Qualifiers::GCNone) { 4114 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 4115 GCAttrs = Qualifiers::Strong; 4116 else if (Ty->isPointerType()) 4117 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 4118 } 4119 // Non-pointers have none gc'able attribute regardless of the attribute 4120 // set on them. 4121 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 4122 return Qualifiers::GCNone; 4123 } 4124 return GCAttrs; 4125} 4126 4127//===----------------------------------------------------------------------===// 4128// Type Compatibility Testing 4129//===----------------------------------------------------------------------===// 4130 4131/// areCompatVectorTypes - Return true if the two specified vector types are 4132/// compatible. 4133static bool areCompatVectorTypes(const VectorType *LHS, 4134 const VectorType *RHS) { 4135 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 4136 return LHS->getElementType() == RHS->getElementType() && 4137 LHS->getNumElements() == RHS->getNumElements(); 4138} 4139 4140//===----------------------------------------------------------------------===// 4141// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 4142//===----------------------------------------------------------------------===// 4143 4144/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 4145/// inheritance hierarchy of 'rProto'. 4146bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 4147 ObjCProtocolDecl *rProto) { 4148 if (lProto == rProto) 4149 return true; 4150 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 4151 E = rProto->protocol_end(); PI != E; ++PI) 4152 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 4153 return true; 4154 return false; 4155} 4156 4157/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 4158/// return true if lhs's protocols conform to rhs's protocol; false 4159/// otherwise. 4160bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 4161 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 4162 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 4163 return false; 4164} 4165 4166/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 4167/// ObjCQualifiedIDType. 4168bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4169 bool compare) { 4170 // Allow id<P..> and an 'id' or void* type in all cases. 4171 if (lhs->isVoidPointerType() || 4172 lhs->isObjCIdType() || lhs->isObjCClassType()) 4173 return true; 4174 else if (rhs->isVoidPointerType() || 4175 rhs->isObjCIdType() || rhs->isObjCClassType()) 4176 return true; 4177 4178 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4179 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4180 4181 if (!rhsOPT) return false; 4182 4183 if (rhsOPT->qual_empty()) { 4184 // If the RHS is a unqualified interface pointer "NSString*", 4185 // make sure we check the class hierarchy. 4186 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4187 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4188 E = lhsQID->qual_end(); I != E; ++I) { 4189 // when comparing an id<P> on lhs with a static type on rhs, 4190 // see if static class implements all of id's protocols, directly or 4191 // through its super class and categories. 4192 if (!rhsID->ClassImplementsProtocol(*I, true)) 4193 return false; 4194 } 4195 } 4196 // If there are no qualifiers and no interface, we have an 'id'. 4197 return true; 4198 } 4199 // Both the right and left sides have qualifiers. 4200 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4201 E = lhsQID->qual_end(); I != E; ++I) { 4202 ObjCProtocolDecl *lhsProto = *I; 4203 bool match = false; 4204 4205 // when comparing an id<P> on lhs with a static type on rhs, 4206 // see if static class implements all of id's protocols, directly or 4207 // through its super class and categories. 4208 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4209 E = rhsOPT->qual_end(); J != E; ++J) { 4210 ObjCProtocolDecl *rhsProto = *J; 4211 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4212 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4213 match = true; 4214 break; 4215 } 4216 } 4217 // If the RHS is a qualified interface pointer "NSString<P>*", 4218 // make sure we check the class hierarchy. 4219 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4220 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4221 E = lhsQID->qual_end(); I != E; ++I) { 4222 // when comparing an id<P> on lhs with a static type on rhs, 4223 // see if static class implements all of id's protocols, directly or 4224 // through its super class and categories. 4225 if (rhsID->ClassImplementsProtocol(*I, true)) { 4226 match = true; 4227 break; 4228 } 4229 } 4230 } 4231 if (!match) 4232 return false; 4233 } 4234 4235 return true; 4236 } 4237 4238 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4239 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4240 4241 if (const ObjCObjectPointerType *lhsOPT = 4242 lhs->getAsObjCInterfacePointerType()) { 4243 if (lhsOPT->qual_empty()) { 4244 bool match = false; 4245 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4246 for (ObjCObjectPointerType::qual_iterator I = rhsQID->qual_begin(), 4247 E = rhsQID->qual_end(); I != E; ++I) { 4248 // when comparing an id<P> on lhs with a static type on rhs, 4249 // see if static class implements all of id's protocols, directly or 4250 // through its super class and categories. 4251 if (lhsID->ClassImplementsProtocol(*I, true)) { 4252 match = true; 4253 break; 4254 } 4255 } 4256 if (!match) 4257 return false; 4258 } 4259 return true; 4260 } 4261 // Both the right and left sides have qualifiers. 4262 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4263 E = lhsOPT->qual_end(); I != E; ++I) { 4264 ObjCProtocolDecl *lhsProto = *I; 4265 bool match = false; 4266 4267 // when comparing an id<P> on lhs with a static type on rhs, 4268 // see if static class implements all of id's protocols, directly or 4269 // through its super class and categories. 4270 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4271 E = rhsQID->qual_end(); J != E; ++J) { 4272 ObjCProtocolDecl *rhsProto = *J; 4273 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4274 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4275 match = true; 4276 break; 4277 } 4278 } 4279 if (!match) 4280 return false; 4281 } 4282 return true; 4283 } 4284 return false; 4285} 4286 4287/// canAssignObjCInterfaces - Return true if the two interface types are 4288/// compatible for assignment from RHS to LHS. This handles validation of any 4289/// protocol qualifiers on the LHS or RHS. 4290/// 4291bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4292 const ObjCObjectPointerType *RHSOPT) { 4293 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4294 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4295 4296 // If either type represents the built-in 'id' or 'Class' types, return true. 4297 if (LHS->isObjCUnqualifiedIdOrClass() || 4298 RHS->isObjCUnqualifiedIdOrClass()) 4299 return true; 4300 4301 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 4302 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4303 QualType(RHSOPT,0), 4304 false); 4305 4306 // If we have 2 user-defined types, fall into that path. 4307 if (LHS->getInterface() && RHS->getInterface()) 4308 return canAssignObjCInterfaces(LHS, RHS); 4309 4310 return false; 4311} 4312 4313/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4314/// for providing type-safty for objective-c pointers used to pass/return 4315/// arguments in block literals. When passed as arguments, passing 'A*' where 4316/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4317/// not OK. For the return type, the opposite is not OK. 4318bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4319 const ObjCObjectPointerType *LHSOPT, 4320 const ObjCObjectPointerType *RHSOPT) { 4321 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4322 return true; 4323 4324 if (LHSOPT->isObjCBuiltinType()) { 4325 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4326 } 4327 4328 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4329 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4330 QualType(RHSOPT,0), 4331 false); 4332 4333 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4334 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4335 if (LHS && RHS) { // We have 2 user-defined types. 4336 if (LHS != RHS) { 4337 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4338 return false; 4339 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4340 return true; 4341 } 4342 else 4343 return true; 4344 } 4345 return false; 4346} 4347 4348/// getIntersectionOfProtocols - This routine finds the intersection of set 4349/// of protocols inherited from two distinct objective-c pointer objects. 4350/// It is used to build composite qualifier list of the composite type of 4351/// the conditional expression involving two objective-c pointer objects. 4352static 4353void getIntersectionOfProtocols(ASTContext &Context, 4354 const ObjCObjectPointerType *LHSOPT, 4355 const ObjCObjectPointerType *RHSOPT, 4356 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4357 4358 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4359 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4360 assert(LHS->getInterface() && "LHS must have an interface base"); 4361 assert(RHS->getInterface() && "RHS must have an interface base"); 4362 4363 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4364 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4365 if (LHSNumProtocols > 0) 4366 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4367 else { 4368 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4369 Context.CollectInheritedProtocols(LHS->getInterface(), 4370 LHSInheritedProtocols); 4371 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4372 LHSInheritedProtocols.end()); 4373 } 4374 4375 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4376 if (RHSNumProtocols > 0) { 4377 ObjCProtocolDecl **RHSProtocols = 4378 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4379 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4380 if (InheritedProtocolSet.count(RHSProtocols[i])) 4381 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4382 } 4383 else { 4384 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4385 Context.CollectInheritedProtocols(RHS->getInterface(), 4386 RHSInheritedProtocols); 4387 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4388 RHSInheritedProtocols.begin(), 4389 E = RHSInheritedProtocols.end(); I != E; ++I) 4390 if (InheritedProtocolSet.count((*I))) 4391 IntersectionOfProtocols.push_back((*I)); 4392 } 4393} 4394 4395/// areCommonBaseCompatible - Returns common base class of the two classes if 4396/// one found. Note that this is O'2 algorithm. But it will be called as the 4397/// last type comparison in a ?-exp of ObjC pointer types before a 4398/// warning is issued. So, its invokation is extremely rare. 4399QualType ASTContext::areCommonBaseCompatible( 4400 const ObjCObjectPointerType *Lptr, 4401 const ObjCObjectPointerType *Rptr) { 4402 const ObjCObjectType *LHS = Lptr->getObjectType(); 4403 const ObjCObjectType *RHS = Rptr->getObjectType(); 4404 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 4405 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 4406 if (!LDecl || !RDecl) 4407 return QualType(); 4408 4409 while ((LDecl = LDecl->getSuperClass())) { 4410 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 4411 if (canAssignObjCInterfaces(LHS, RHS)) { 4412 llvm::SmallVector<ObjCProtocolDecl *, 8> Protocols; 4413 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 4414 4415 QualType Result = QualType(LHS, 0); 4416 if (!Protocols.empty()) 4417 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 4418 Result = getObjCObjectPointerType(Result); 4419 return Result; 4420 } 4421 } 4422 4423 return QualType(); 4424} 4425 4426bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 4427 const ObjCObjectType *RHS) { 4428 assert(LHS->getInterface() && "LHS is not an interface type"); 4429 assert(RHS->getInterface() && "RHS is not an interface type"); 4430 4431 // Verify that the base decls are compatible: the RHS must be a subclass of 4432 // the LHS. 4433 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 4434 return false; 4435 4436 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4437 // protocol qualified at all, then we are good. 4438 if (LHS->getNumProtocols() == 0) 4439 return true; 4440 4441 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4442 // isn't a superset. 4443 if (RHS->getNumProtocols() == 0) 4444 return true; // FIXME: should return false! 4445 4446 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 4447 LHSPE = LHS->qual_end(); 4448 LHSPI != LHSPE; LHSPI++) { 4449 bool RHSImplementsProtocol = false; 4450 4451 // If the RHS doesn't implement the protocol on the left, the types 4452 // are incompatible. 4453 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 4454 RHSPE = RHS->qual_end(); 4455 RHSPI != RHSPE; RHSPI++) { 4456 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4457 RHSImplementsProtocol = true; 4458 break; 4459 } 4460 } 4461 // FIXME: For better diagnostics, consider passing back the protocol name. 4462 if (!RHSImplementsProtocol) 4463 return false; 4464 } 4465 // The RHS implements all protocols listed on the LHS. 4466 return true; 4467} 4468 4469bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4470 // get the "pointed to" types 4471 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4472 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4473 4474 if (!LHSOPT || !RHSOPT) 4475 return false; 4476 4477 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4478 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4479} 4480 4481/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4482/// both shall have the identically qualified version of a compatible type. 4483/// C99 6.2.7p1: Two types have compatible types if their types are the 4484/// same. See 6.7.[2,3,5] for additional rules. 4485bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 4486 if (getLangOptions().CPlusPlus) 4487 return hasSameType(LHS, RHS); 4488 4489 return !mergeTypes(LHS, RHS).isNull(); 4490} 4491 4492bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 4493 return !mergeTypes(LHS, RHS, true).isNull(); 4494} 4495 4496QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 4497 bool OfBlockPointer) { 4498 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4499 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4500 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4501 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4502 bool allLTypes = true; 4503 bool allRTypes = true; 4504 4505 // Check return type 4506 QualType retType; 4507 if (OfBlockPointer) 4508 retType = mergeTypes(rbase->getResultType(), lbase->getResultType(), true); 4509 else 4510 retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 4511 if (retType.isNull()) return QualType(); 4512 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 4513 allLTypes = false; 4514 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 4515 allRTypes = false; 4516 // FIXME: double check this 4517 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 4518 // rbase->getRegParmAttr() != 0 && 4519 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 4520 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 4521 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 4522 unsigned RegParm = lbaseInfo.getRegParm() == 0 ? rbaseInfo.getRegParm() : 4523 lbaseInfo.getRegParm(); 4524 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 4525 if (NoReturn != lbaseInfo.getNoReturn() || 4526 RegParm != lbaseInfo.getRegParm()) 4527 allLTypes = false; 4528 if (NoReturn != rbaseInfo.getNoReturn() || 4529 RegParm != rbaseInfo.getRegParm()) 4530 allRTypes = false; 4531 CallingConv lcc = lbaseInfo.getCC(); 4532 CallingConv rcc = rbaseInfo.getCC(); 4533 // Compatible functions must have compatible calling conventions 4534 if (!isSameCallConv(lcc, rcc)) 4535 return QualType(); 4536 4537 if (lproto && rproto) { // two C99 style function prototypes 4538 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4539 "C++ shouldn't be here"); 4540 unsigned lproto_nargs = lproto->getNumArgs(); 4541 unsigned rproto_nargs = rproto->getNumArgs(); 4542 4543 // Compatible functions must have the same number of arguments 4544 if (lproto_nargs != rproto_nargs) 4545 return QualType(); 4546 4547 // Variadic and non-variadic functions aren't compatible 4548 if (lproto->isVariadic() != rproto->isVariadic()) 4549 return QualType(); 4550 4551 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4552 return QualType(); 4553 4554 // Check argument compatibility 4555 llvm::SmallVector<QualType, 10> types; 4556 for (unsigned i = 0; i < lproto_nargs; i++) { 4557 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4558 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4559 QualType argtype = mergeTypes(largtype, rargtype, OfBlockPointer); 4560 if (argtype.isNull()) return QualType(); 4561 types.push_back(argtype); 4562 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4563 allLTypes = false; 4564 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4565 allRTypes = false; 4566 } 4567 if (allLTypes) return lhs; 4568 if (allRTypes) return rhs; 4569 return getFunctionType(retType, types.begin(), types.size(), 4570 lproto->isVariadic(), lproto->getTypeQuals(), 4571 false, false, 0, 0, 4572 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4573 } 4574 4575 if (lproto) allRTypes = false; 4576 if (rproto) allLTypes = false; 4577 4578 const FunctionProtoType *proto = lproto ? lproto : rproto; 4579 if (proto) { 4580 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4581 if (proto->isVariadic()) return QualType(); 4582 // Check that the types are compatible with the types that 4583 // would result from default argument promotions (C99 6.7.5.3p15). 4584 // The only types actually affected are promotable integer 4585 // types and floats, which would be passed as a different 4586 // type depending on whether the prototype is visible. 4587 unsigned proto_nargs = proto->getNumArgs(); 4588 for (unsigned i = 0; i < proto_nargs; ++i) { 4589 QualType argTy = proto->getArgType(i); 4590 4591 // Look at the promotion type of enum types, since that is the type used 4592 // to pass enum values. 4593 if (const EnumType *Enum = argTy->getAs<EnumType>()) 4594 argTy = Enum->getDecl()->getPromotionType(); 4595 4596 if (argTy->isPromotableIntegerType() || 4597 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4598 return QualType(); 4599 } 4600 4601 if (allLTypes) return lhs; 4602 if (allRTypes) return rhs; 4603 return getFunctionType(retType, proto->arg_type_begin(), 4604 proto->getNumArgs(), proto->isVariadic(), 4605 proto->getTypeQuals(), 4606 false, false, 0, 0, 4607 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4608 } 4609 4610 if (allLTypes) return lhs; 4611 if (allRTypes) return rhs; 4612 FunctionType::ExtInfo Info(NoReturn, RegParm, lcc); 4613 return getFunctionNoProtoType(retType, Info); 4614} 4615 4616QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 4617 bool OfBlockPointer) { 4618 // C++ [expr]: If an expression initially has the type "reference to T", the 4619 // type is adjusted to "T" prior to any further analysis, the expression 4620 // designates the object or function denoted by the reference, and the 4621 // expression is an lvalue unless the reference is an rvalue reference and 4622 // the expression is a function call (possibly inside parentheses). 4623 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 4624 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 4625 4626 QualType LHSCan = getCanonicalType(LHS), 4627 RHSCan = getCanonicalType(RHS); 4628 4629 // If two types are identical, they are compatible. 4630 if (LHSCan == RHSCan) 4631 return LHS; 4632 4633 // If the qualifiers are different, the types aren't compatible... mostly. 4634 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4635 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4636 if (LQuals != RQuals) { 4637 // If any of these qualifiers are different, we have a type 4638 // mismatch. 4639 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4640 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4641 return QualType(); 4642 4643 // Exactly one GC qualifier difference is allowed: __strong is 4644 // okay if the other type has no GC qualifier but is an Objective 4645 // C object pointer (i.e. implicitly strong by default). We fix 4646 // this by pretending that the unqualified type was actually 4647 // qualified __strong. 4648 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4649 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4650 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4651 4652 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4653 return QualType(); 4654 4655 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4656 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4657 } 4658 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4659 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4660 } 4661 return QualType(); 4662 } 4663 4664 // Okay, qualifiers are equal. 4665 4666 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4667 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4668 4669 // We want to consider the two function types to be the same for these 4670 // comparisons, just force one to the other. 4671 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 4672 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 4673 4674 // Same as above for arrays 4675 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 4676 LHSClass = Type::ConstantArray; 4677 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 4678 RHSClass = Type::ConstantArray; 4679 4680 // ObjCInterfaces are just specialized ObjCObjects. 4681 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 4682 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 4683 4684 // Canonicalize ExtVector -> Vector. 4685 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 4686 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 4687 4688 // If the canonical type classes don't match. 4689 if (LHSClass != RHSClass) { 4690 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 4691 // a signed integer type, or an unsigned integer type. 4692 // Compatibility is based on the underlying type, not the promotion 4693 // type. 4694 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 4695 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 4696 return RHS; 4697 } 4698 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 4699 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 4700 return LHS; 4701 } 4702 4703 return QualType(); 4704 } 4705 4706 // The canonical type classes match. 4707 switch (LHSClass) { 4708#define TYPE(Class, Base) 4709#define ABSTRACT_TYPE(Class, Base) 4710#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 4711#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4712#define DEPENDENT_TYPE(Class, Base) case Type::Class: 4713#include "clang/AST/TypeNodes.def" 4714 assert(false && "Non-canonical and dependent types shouldn't get here"); 4715 return QualType(); 4716 4717 case Type::LValueReference: 4718 case Type::RValueReference: 4719 case Type::MemberPointer: 4720 assert(false && "C++ should never be in mergeTypes"); 4721 return QualType(); 4722 4723 case Type::ObjCInterface: 4724 case Type::IncompleteArray: 4725 case Type::VariableArray: 4726 case Type::FunctionProto: 4727 case Type::ExtVector: 4728 assert(false && "Types are eliminated above"); 4729 return QualType(); 4730 4731 case Type::Pointer: 4732 { 4733 // Merge two pointer types, while trying to preserve typedef info 4734 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 4735 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 4736 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 4737 if (ResultType.isNull()) return QualType(); 4738 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4739 return LHS; 4740 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4741 return RHS; 4742 return getPointerType(ResultType); 4743 } 4744 case Type::BlockPointer: 4745 { 4746 // Merge two block pointer types, while trying to preserve typedef info 4747 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 4748 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 4749 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer); 4750 if (ResultType.isNull()) return QualType(); 4751 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4752 return LHS; 4753 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4754 return RHS; 4755 return getBlockPointerType(ResultType); 4756 } 4757 case Type::ConstantArray: 4758 { 4759 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 4760 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 4761 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 4762 return QualType(); 4763 4764 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 4765 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 4766 QualType ResultType = mergeTypes(LHSElem, RHSElem); 4767 if (ResultType.isNull()) return QualType(); 4768 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4769 return LHS; 4770 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4771 return RHS; 4772 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 4773 ArrayType::ArraySizeModifier(), 0); 4774 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 4775 ArrayType::ArraySizeModifier(), 0); 4776 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 4777 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 4778 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4779 return LHS; 4780 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4781 return RHS; 4782 if (LVAT) { 4783 // FIXME: This isn't correct! But tricky to implement because 4784 // the array's size has to be the size of LHS, but the type 4785 // has to be different. 4786 return LHS; 4787 } 4788 if (RVAT) { 4789 // FIXME: This isn't correct! But tricky to implement because 4790 // the array's size has to be the size of RHS, but the type 4791 // has to be different. 4792 return RHS; 4793 } 4794 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 4795 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 4796 return getIncompleteArrayType(ResultType, 4797 ArrayType::ArraySizeModifier(), 0); 4798 } 4799 case Type::FunctionNoProto: 4800 return mergeFunctionTypes(LHS, RHS, OfBlockPointer); 4801 case Type::Record: 4802 case Type::Enum: 4803 return QualType(); 4804 case Type::Builtin: 4805 // Only exactly equal builtin types are compatible, which is tested above. 4806 return QualType(); 4807 case Type::Complex: 4808 // Distinct complex types are incompatible. 4809 return QualType(); 4810 case Type::Vector: 4811 // FIXME: The merged type should be an ExtVector! 4812 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 4813 RHSCan->getAs<VectorType>())) 4814 return LHS; 4815 return QualType(); 4816 case Type::ObjCObject: { 4817 // Check if the types are assignment compatible. 4818 // FIXME: This should be type compatibility, e.g. whether 4819 // "LHS x; RHS x;" at global scope is legal. 4820 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 4821 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 4822 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 4823 return LHS; 4824 4825 return QualType(); 4826 } 4827 case Type::ObjCObjectPointer: { 4828 if (OfBlockPointer) { 4829 if (canAssignObjCInterfacesInBlockPointer( 4830 LHS->getAs<ObjCObjectPointerType>(), 4831 RHS->getAs<ObjCObjectPointerType>())) 4832 return LHS; 4833 return QualType(); 4834 } 4835 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 4836 RHS->getAs<ObjCObjectPointerType>())) 4837 return LHS; 4838 4839 return QualType(); 4840 } 4841 } 4842 4843 return QualType(); 4844} 4845 4846/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 4847/// 'RHS' attributes and returns the merged version; including for function 4848/// return types. 4849QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 4850 QualType LHSCan = getCanonicalType(LHS), 4851 RHSCan = getCanonicalType(RHS); 4852 // If two types are identical, they are compatible. 4853 if (LHSCan == RHSCan) 4854 return LHS; 4855 if (RHSCan->isFunctionType()) { 4856 if (!LHSCan->isFunctionType()) 4857 return QualType(); 4858 QualType OldReturnType = 4859 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 4860 QualType NewReturnType = 4861 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 4862 QualType ResReturnType = 4863 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 4864 if (ResReturnType.isNull()) 4865 return QualType(); 4866 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 4867 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 4868 // In either case, use OldReturnType to build the new function type. 4869 const FunctionType *F = LHS->getAs<FunctionType>(); 4870 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 4871 FunctionType::ExtInfo Info = getFunctionExtInfo(LHS); 4872 QualType ResultType 4873 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 4874 FPT->getNumArgs(), FPT->isVariadic(), 4875 FPT->getTypeQuals(), 4876 FPT->hasExceptionSpec(), 4877 FPT->hasAnyExceptionSpec(), 4878 FPT->getNumExceptions(), 4879 FPT->exception_begin(), 4880 Info); 4881 return ResultType; 4882 } 4883 } 4884 return QualType(); 4885 } 4886 4887 // If the qualifiers are different, the types can still be merged. 4888 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4889 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4890 if (LQuals != RQuals) { 4891 // If any of these qualifiers are different, we have a type mismatch. 4892 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4893 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4894 return QualType(); 4895 4896 // Exactly one GC qualifier difference is allowed: __strong is 4897 // okay if the other type has no GC qualifier but is an Objective 4898 // C object pointer (i.e. implicitly strong by default). We fix 4899 // this by pretending that the unqualified type was actually 4900 // qualified __strong. 4901 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4902 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4903 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4904 4905 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4906 return QualType(); 4907 4908 if (GC_L == Qualifiers::Strong) 4909 return LHS; 4910 if (GC_R == Qualifiers::Strong) 4911 return RHS; 4912 return QualType(); 4913 } 4914 4915 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 4916 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 4917 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 4918 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 4919 if (ResQT == LHSBaseQT) 4920 return LHS; 4921 if (ResQT == RHSBaseQT) 4922 return RHS; 4923 } 4924 return QualType(); 4925} 4926 4927//===----------------------------------------------------------------------===// 4928// Integer Predicates 4929//===----------------------------------------------------------------------===// 4930 4931unsigned ASTContext::getIntWidth(QualType T) { 4932 if (T->isBooleanType()) 4933 return 1; 4934 if (EnumType *ET = dyn_cast<EnumType>(T)) 4935 T = ET->getDecl()->getIntegerType(); 4936 // For builtin types, just use the standard type sizing method 4937 return (unsigned)getTypeSize(T); 4938} 4939 4940QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 4941 assert(T->isSignedIntegerType() && "Unexpected type"); 4942 4943 // Turn <4 x signed int> -> <4 x unsigned int> 4944 if (const VectorType *VTy = T->getAs<VectorType>()) 4945 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 4946 VTy->getNumElements(), VTy->getAltiVecSpecific()); 4947 4948 // For enums, we return the unsigned version of the base type. 4949 if (const EnumType *ETy = T->getAs<EnumType>()) 4950 T = ETy->getDecl()->getIntegerType(); 4951 4952 const BuiltinType *BTy = T->getAs<BuiltinType>(); 4953 assert(BTy && "Unexpected signed integer type"); 4954 switch (BTy->getKind()) { 4955 case BuiltinType::Char_S: 4956 case BuiltinType::SChar: 4957 return UnsignedCharTy; 4958 case BuiltinType::Short: 4959 return UnsignedShortTy; 4960 case BuiltinType::Int: 4961 return UnsignedIntTy; 4962 case BuiltinType::Long: 4963 return UnsignedLongTy; 4964 case BuiltinType::LongLong: 4965 return UnsignedLongLongTy; 4966 case BuiltinType::Int128: 4967 return UnsignedInt128Ty; 4968 default: 4969 assert(0 && "Unexpected signed integer type"); 4970 return QualType(); 4971 } 4972} 4973 4974ExternalASTSource::~ExternalASTSource() { } 4975 4976void ExternalASTSource::PrintStats() { } 4977 4978 4979//===----------------------------------------------------------------------===// 4980// Builtin Type Computation 4981//===----------------------------------------------------------------------===// 4982 4983/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 4984/// pointer over the consumed characters. This returns the resultant type. 4985static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 4986 ASTContext::GetBuiltinTypeError &Error, 4987 bool AllowTypeModifiers = true) { 4988 // Modifiers. 4989 int HowLong = 0; 4990 bool Signed = false, Unsigned = false; 4991 4992 // Read the modifiers first. 4993 bool Done = false; 4994 while (!Done) { 4995 switch (*Str++) { 4996 default: Done = true; --Str; break; 4997 case 'S': 4998 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 4999 assert(!Signed && "Can't use 'S' modifier multiple times!"); 5000 Signed = true; 5001 break; 5002 case 'U': 5003 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 5004 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 5005 Unsigned = true; 5006 break; 5007 case 'L': 5008 assert(HowLong <= 2 && "Can't have LLLL modifier"); 5009 ++HowLong; 5010 break; 5011 } 5012 } 5013 5014 QualType Type; 5015 5016 // Read the base type. 5017 switch (*Str++) { 5018 default: assert(0 && "Unknown builtin type letter!"); 5019 case 'v': 5020 assert(HowLong == 0 && !Signed && !Unsigned && 5021 "Bad modifiers used with 'v'!"); 5022 Type = Context.VoidTy; 5023 break; 5024 case 'f': 5025 assert(HowLong == 0 && !Signed && !Unsigned && 5026 "Bad modifiers used with 'f'!"); 5027 Type = Context.FloatTy; 5028 break; 5029 case 'd': 5030 assert(HowLong < 2 && !Signed && !Unsigned && 5031 "Bad modifiers used with 'd'!"); 5032 if (HowLong) 5033 Type = Context.LongDoubleTy; 5034 else 5035 Type = Context.DoubleTy; 5036 break; 5037 case 's': 5038 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 5039 if (Unsigned) 5040 Type = Context.UnsignedShortTy; 5041 else 5042 Type = Context.ShortTy; 5043 break; 5044 case 'i': 5045 if (HowLong == 3) 5046 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 5047 else if (HowLong == 2) 5048 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 5049 else if (HowLong == 1) 5050 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 5051 else 5052 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 5053 break; 5054 case 'c': 5055 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 5056 if (Signed) 5057 Type = Context.SignedCharTy; 5058 else if (Unsigned) 5059 Type = Context.UnsignedCharTy; 5060 else 5061 Type = Context.CharTy; 5062 break; 5063 case 'b': // boolean 5064 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 5065 Type = Context.BoolTy; 5066 break; 5067 case 'z': // size_t. 5068 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 5069 Type = Context.getSizeType(); 5070 break; 5071 case 'F': 5072 Type = Context.getCFConstantStringType(); 5073 break; 5074 case 'a': 5075 Type = Context.getBuiltinVaListType(); 5076 assert(!Type.isNull() && "builtin va list type not initialized!"); 5077 break; 5078 case 'A': 5079 // This is a "reference" to a va_list; however, what exactly 5080 // this means depends on how va_list is defined. There are two 5081 // different kinds of va_list: ones passed by value, and ones 5082 // passed by reference. An example of a by-value va_list is 5083 // x86, where va_list is a char*. An example of by-ref va_list 5084 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 5085 // we want this argument to be a char*&; for x86-64, we want 5086 // it to be a __va_list_tag*. 5087 Type = Context.getBuiltinVaListType(); 5088 assert(!Type.isNull() && "builtin va list type not initialized!"); 5089 if (Type->isArrayType()) { 5090 Type = Context.getArrayDecayedType(Type); 5091 } else { 5092 Type = Context.getLValueReferenceType(Type); 5093 } 5094 break; 5095 case 'V': { 5096 char *End; 5097 unsigned NumElements = strtoul(Str, &End, 10); 5098 assert(End != Str && "Missing vector size"); 5099 5100 Str = End; 5101 5102 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 5103 // FIXME: Don't know what to do about AltiVec. 5104 Type = Context.getVectorType(ElementType, NumElements, 5105 VectorType::NotAltiVec); 5106 break; 5107 } 5108 case 'X': { 5109 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 5110 Type = Context.getComplexType(ElementType); 5111 break; 5112 } 5113 case 'P': 5114 Type = Context.getFILEType(); 5115 if (Type.isNull()) { 5116 Error = ASTContext::GE_Missing_stdio; 5117 return QualType(); 5118 } 5119 break; 5120 case 'J': 5121 if (Signed) 5122 Type = Context.getsigjmp_bufType(); 5123 else 5124 Type = Context.getjmp_bufType(); 5125 5126 if (Type.isNull()) { 5127 Error = ASTContext::GE_Missing_setjmp; 5128 return QualType(); 5129 } 5130 break; 5131 } 5132 5133 if (!AllowTypeModifiers) 5134 return Type; 5135 5136 Done = false; 5137 while (!Done) { 5138 switch (char c = *Str++) { 5139 default: Done = true; --Str; break; 5140 case '*': 5141 case '&': 5142 { 5143 // Both pointers and references can have their pointee types 5144 // qualified with an address space. 5145 char *End; 5146 unsigned AddrSpace = strtoul(Str, &End, 10); 5147 if (End != Str && AddrSpace != 0) { 5148 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 5149 Str = End; 5150 } 5151 } 5152 if (c == '*') 5153 Type = Context.getPointerType(Type); 5154 else 5155 Type = Context.getLValueReferenceType(Type); 5156 break; 5157 // FIXME: There's no way to have a built-in with an rvalue ref arg. 5158 case 'C': 5159 Type = Type.withConst(); 5160 break; 5161 case 'D': 5162 Type = Context.getVolatileType(Type); 5163 break; 5164 } 5165 } 5166 5167 return Type; 5168} 5169 5170/// GetBuiltinType - Return the type for the specified builtin. 5171QualType ASTContext::GetBuiltinType(unsigned id, 5172 GetBuiltinTypeError &Error) { 5173 const char *TypeStr = BuiltinInfo.GetTypeString(id); 5174 5175 llvm::SmallVector<QualType, 8> ArgTypes; 5176 5177 Error = GE_None; 5178 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 5179 if (Error != GE_None) 5180 return QualType(); 5181 while (TypeStr[0] && TypeStr[0] != '.') { 5182 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 5183 if (Error != GE_None) 5184 return QualType(); 5185 5186 // Do array -> pointer decay. The builtin should use the decayed type. 5187 if (Ty->isArrayType()) 5188 Ty = getArrayDecayedType(Ty); 5189 5190 ArgTypes.push_back(Ty); 5191 } 5192 5193 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 5194 "'.' should only occur at end of builtin type list!"); 5195 5196 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 5197 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 5198 return getFunctionNoProtoType(ResType); 5199 5200 // FIXME: Should we create noreturn types? 5201 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 5202 TypeStr[0] == '.', 0, false, false, 0, 0, 5203 FunctionType::ExtInfo()); 5204} 5205 5206QualType 5207ASTContext::UsualArithmeticConversionsType(QualType lhs, QualType rhs) { 5208 // Perform the usual unary conversions. We do this early so that 5209 // integral promotions to "int" can allow us to exit early, in the 5210 // lhs == rhs check. Also, for conversion purposes, we ignore any 5211 // qualifiers. For example, "const float" and "float" are 5212 // equivalent. 5213 if (lhs->isPromotableIntegerType()) 5214 lhs = getPromotedIntegerType(lhs); 5215 else 5216 lhs = lhs.getUnqualifiedType(); 5217 if (rhs->isPromotableIntegerType()) 5218 rhs = getPromotedIntegerType(rhs); 5219 else 5220 rhs = rhs.getUnqualifiedType(); 5221 5222 // If both types are identical, no conversion is needed. 5223 if (lhs == rhs) 5224 return lhs; 5225 5226 // If either side is a non-arithmetic type (e.g. a pointer), we are done. 5227 // The caller can deal with this (e.g. pointer + int). 5228 if (!lhs->isArithmeticType() || !rhs->isArithmeticType()) 5229 return lhs; 5230 5231 // At this point, we have two different arithmetic types. 5232 5233 // Handle complex types first (C99 6.3.1.8p1). 5234 if (lhs->isComplexType() || rhs->isComplexType()) { 5235 // if we have an integer operand, the result is the complex type. 5236 if (rhs->isIntegerType() || rhs->isComplexIntegerType()) { 5237 // convert the rhs to the lhs complex type. 5238 return lhs; 5239 } 5240 if (lhs->isIntegerType() || lhs->isComplexIntegerType()) { 5241 // convert the lhs to the rhs complex type. 5242 return rhs; 5243 } 5244 // This handles complex/complex, complex/float, or float/complex. 5245 // When both operands are complex, the shorter operand is converted to the 5246 // type of the longer, and that is the type of the result. This corresponds 5247 // to what is done when combining two real floating-point operands. 5248 // The fun begins when size promotion occur across type domains. 5249 // From H&S 6.3.4: When one operand is complex and the other is a real 5250 // floating-point type, the less precise type is converted, within it's 5251 // real or complex domain, to the precision of the other type. For example, 5252 // when combining a "long double" with a "double _Complex", the 5253 // "double _Complex" is promoted to "long double _Complex". 5254 int result = getFloatingTypeOrder(lhs, rhs); 5255 5256 if (result > 0) { // The left side is bigger, convert rhs. 5257 rhs = getFloatingTypeOfSizeWithinDomain(lhs, rhs); 5258 } else if (result < 0) { // The right side is bigger, convert lhs. 5259 lhs = getFloatingTypeOfSizeWithinDomain(rhs, lhs); 5260 } 5261 // At this point, lhs and rhs have the same rank/size. Now, make sure the 5262 // domains match. This is a requirement for our implementation, C99 5263 // does not require this promotion. 5264 if (lhs != rhs) { // Domains don't match, we have complex/float mix. 5265 if (lhs->isRealFloatingType()) { // handle "double, _Complex double". 5266 return rhs; 5267 } else { // handle "_Complex double, double". 5268 return lhs; 5269 } 5270 } 5271 return lhs; // The domain/size match exactly. 5272 } 5273 // Now handle "real" floating types (i.e. float, double, long double). 5274 if (lhs->isRealFloatingType() || rhs->isRealFloatingType()) { 5275 // if we have an integer operand, the result is the real floating type. 5276 if (rhs->isIntegerType()) { 5277 // convert rhs to the lhs floating point type. 5278 return lhs; 5279 } 5280 if (rhs->isComplexIntegerType()) { 5281 // convert rhs to the complex floating point type. 5282 return getComplexType(lhs); 5283 } 5284 if (lhs->isIntegerType()) { 5285 // convert lhs to the rhs floating point type. 5286 return rhs; 5287 } 5288 if (lhs->isComplexIntegerType()) { 5289 // convert lhs to the complex floating point type. 5290 return getComplexType(rhs); 5291 } 5292 // We have two real floating types, float/complex combos were handled above. 5293 // Convert the smaller operand to the bigger result. 5294 int result = getFloatingTypeOrder(lhs, rhs); 5295 if (result > 0) // convert the rhs 5296 return lhs; 5297 assert(result < 0 && "illegal float comparison"); 5298 return rhs; // convert the lhs 5299 } 5300 if (lhs->isComplexIntegerType() || rhs->isComplexIntegerType()) { 5301 // Handle GCC complex int extension. 5302 const ComplexType *lhsComplexInt = lhs->getAsComplexIntegerType(); 5303 const ComplexType *rhsComplexInt = rhs->getAsComplexIntegerType(); 5304 5305 if (lhsComplexInt && rhsComplexInt) { 5306 if (getIntegerTypeOrder(lhsComplexInt->getElementType(), 5307 rhsComplexInt->getElementType()) >= 0) 5308 return lhs; // convert the rhs 5309 return rhs; 5310 } else if (lhsComplexInt && rhs->isIntegerType()) { 5311 // convert the rhs to the lhs complex type. 5312 return lhs; 5313 } else if (rhsComplexInt && lhs->isIntegerType()) { 5314 // convert the lhs to the rhs complex type. 5315 return rhs; 5316 } 5317 } 5318 // Finally, we have two differing integer types. 5319 // The rules for this case are in C99 6.3.1.8 5320 int compare = getIntegerTypeOrder(lhs, rhs); 5321 bool lhsSigned = lhs->isSignedIntegerType(), 5322 rhsSigned = rhs->isSignedIntegerType(); 5323 QualType destType; 5324 if (lhsSigned == rhsSigned) { 5325 // Same signedness; use the higher-ranked type 5326 destType = compare >= 0 ? lhs : rhs; 5327 } else if (compare != (lhsSigned ? 1 : -1)) { 5328 // The unsigned type has greater than or equal rank to the 5329 // signed type, so use the unsigned type 5330 destType = lhsSigned ? rhs : lhs; 5331 } else if (getIntWidth(lhs) != getIntWidth(rhs)) { 5332 // The two types are different widths; if we are here, that 5333 // means the signed type is larger than the unsigned type, so 5334 // use the signed type. 5335 destType = lhsSigned ? lhs : rhs; 5336 } else { 5337 // The signed type is higher-ranked than the unsigned type, 5338 // but isn't actually any bigger (like unsigned int and long 5339 // on most 32-bit systems). Use the unsigned type corresponding 5340 // to the signed type. 5341 destType = getCorrespondingUnsignedType(lhsSigned ? lhs : rhs); 5342 } 5343 return destType; 5344} 5345