ASTContext.cpp revision 80aa1cd7973561889e51c1c152c8990a8de9c953
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 bool IsAltiVec, bool IsPixel) { 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, 1526 IsAltiVec, IsPixel); 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() || IsAltiVec || IsPixel) { 1535 Canonical = getVectorType(getCanonicalType(vecType), 1536 NumElts, false, false); 1537 1538 // Get the new insert position for the node we care about. 1539 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1540 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1541 } 1542 VectorType *New = new (*this, TypeAlignment) 1543 VectorType(vecType, NumElts, Canonical, IsAltiVec, IsPixel); 1544 VectorTypes.InsertNode(New, InsertPos); 1545 Types.push_back(New); 1546 return QualType(New, 0); 1547} 1548 1549/// getExtVectorType - Return the unique reference to an extended vector type of 1550/// the specified element type and size. VectorType must be a built-in type. 1551QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1552 BuiltinType *baseType; 1553 1554 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1555 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1556 1557 // Check if we've already instantiated a vector of this type. 1558 llvm::FoldingSetNodeID ID; 1559 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, false, false); 1560 void *InsertPos = 0; 1561 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1562 return QualType(VTP, 0); 1563 1564 // If the element type isn't canonical, this won't be a canonical type either, 1565 // so fill in the canonical type field. 1566 QualType Canonical; 1567 if (!vecType.isCanonical()) { 1568 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1569 1570 // Get the new insert position for the node we care about. 1571 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1572 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1573 } 1574 ExtVectorType *New = new (*this, TypeAlignment) 1575 ExtVectorType(vecType, NumElts, Canonical); 1576 VectorTypes.InsertNode(New, InsertPos); 1577 Types.push_back(New); 1578 return QualType(New, 0); 1579} 1580 1581QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1582 Expr *SizeExpr, 1583 SourceLocation AttrLoc) { 1584 llvm::FoldingSetNodeID ID; 1585 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1586 SizeExpr); 1587 1588 void *InsertPos = 0; 1589 DependentSizedExtVectorType *Canon 1590 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1591 DependentSizedExtVectorType *New; 1592 if (Canon) { 1593 // We already have a canonical version of this array type; use it as 1594 // the canonical type for a newly-built type. 1595 New = new (*this, TypeAlignment) 1596 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1597 SizeExpr, AttrLoc); 1598 } else { 1599 QualType CanonVecTy = getCanonicalType(vecType); 1600 if (CanonVecTy == vecType) { 1601 New = new (*this, TypeAlignment) 1602 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1603 AttrLoc); 1604 1605 DependentSizedExtVectorType *CanonCheck 1606 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1607 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1608 (void)CanonCheck; 1609 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1610 } else { 1611 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1612 SourceLocation()); 1613 New = new (*this, TypeAlignment) 1614 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1615 } 1616 } 1617 1618 Types.push_back(New); 1619 return QualType(New, 0); 1620} 1621 1622/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1623/// 1624QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, 1625 const FunctionType::ExtInfo &Info) { 1626 const CallingConv CallConv = Info.getCC(); 1627 // Unique functions, to guarantee there is only one function of a particular 1628 // structure. 1629 llvm::FoldingSetNodeID ID; 1630 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1631 1632 void *InsertPos = 0; 1633 if (FunctionNoProtoType *FT = 1634 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1635 return QualType(FT, 0); 1636 1637 QualType Canonical; 1638 if (!ResultTy.isCanonical() || 1639 getCanonicalCallConv(CallConv) != CallConv) { 1640 Canonical = 1641 getFunctionNoProtoType(getCanonicalType(ResultTy), 1642 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1643 1644 // Get the new insert position for the node we care about. 1645 FunctionNoProtoType *NewIP = 1646 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1647 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1648 } 1649 1650 FunctionNoProtoType *New = new (*this, TypeAlignment) 1651 FunctionNoProtoType(ResultTy, Canonical, Info); 1652 Types.push_back(New); 1653 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1654 return QualType(New, 0); 1655} 1656 1657/// getFunctionType - Return a normal function type with a typed argument 1658/// list. isVariadic indicates whether the argument list includes '...'. 1659QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1660 unsigned NumArgs, bool isVariadic, 1661 unsigned TypeQuals, bool hasExceptionSpec, 1662 bool hasAnyExceptionSpec, unsigned NumExs, 1663 const QualType *ExArray, 1664 const FunctionType::ExtInfo &Info) { 1665 const CallingConv CallConv= Info.getCC(); 1666 // Unique functions, to guarantee there is only one function of a particular 1667 // structure. 1668 llvm::FoldingSetNodeID ID; 1669 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1670 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1671 NumExs, ExArray, Info); 1672 1673 void *InsertPos = 0; 1674 if (FunctionProtoType *FTP = 1675 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1676 return QualType(FTP, 0); 1677 1678 // Determine whether the type being created is already canonical or not. 1679 bool isCanonical = !hasExceptionSpec && ResultTy.isCanonical(); 1680 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1681 if (!ArgArray[i].isCanonicalAsParam()) 1682 isCanonical = false; 1683 1684 // If this type isn't canonical, get the canonical version of it. 1685 // The exception spec is not part of the canonical type. 1686 QualType Canonical; 1687 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1688 llvm::SmallVector<QualType, 16> CanonicalArgs; 1689 CanonicalArgs.reserve(NumArgs); 1690 for (unsigned i = 0; i != NumArgs; ++i) 1691 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1692 1693 Canonical = getFunctionType(getCanonicalType(ResultTy), 1694 CanonicalArgs.data(), NumArgs, 1695 isVariadic, TypeQuals, false, 1696 false, 0, 0, 1697 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1698 1699 // Get the new insert position for the node we care about. 1700 FunctionProtoType *NewIP = 1701 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1702 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1703 } 1704 1705 // FunctionProtoType objects are allocated with extra bytes after them 1706 // for two variable size arrays (for parameter and exception types) at the 1707 // end of them. 1708 FunctionProtoType *FTP = 1709 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1710 NumArgs*sizeof(QualType) + 1711 NumExs*sizeof(QualType), TypeAlignment); 1712 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1713 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1714 ExArray, NumExs, Canonical, Info); 1715 Types.push_back(FTP); 1716 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1717 return QualType(FTP, 0); 1718} 1719 1720#ifndef NDEBUG 1721static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1722 if (!isa<CXXRecordDecl>(D)) return false; 1723 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1724 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1725 return true; 1726 if (RD->getDescribedClassTemplate() && 1727 !isa<ClassTemplateSpecializationDecl>(RD)) 1728 return true; 1729 return false; 1730} 1731#endif 1732 1733/// getInjectedClassNameType - Return the unique reference to the 1734/// injected class name type for the specified templated declaration. 1735QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1736 QualType TST) { 1737 assert(NeedsInjectedClassNameType(Decl)); 1738 if (Decl->TypeForDecl) { 1739 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1740 } else if (CXXRecordDecl *PrevDecl 1741 = cast_or_null<CXXRecordDecl>(Decl->getPreviousDeclaration())) { 1742 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1743 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1744 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1745 } else { 1746 Decl->TypeForDecl = 1747 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 1748 Types.push_back(Decl->TypeForDecl); 1749 } 1750 return QualType(Decl->TypeForDecl, 0); 1751} 1752 1753/// getTypeDeclType - Return the unique reference to the type for the 1754/// specified type declaration. 1755QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) { 1756 assert(Decl && "Passed null for Decl param"); 1757 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 1758 1759 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1760 return getTypedefType(Typedef); 1761 1762 assert(!isa<TemplateTypeParmDecl>(Decl) && 1763 "Template type parameter types are always available."); 1764 1765 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1766 assert(!Record->getPreviousDeclaration() && 1767 "struct/union has previous declaration"); 1768 assert(!NeedsInjectedClassNameType(Record)); 1769 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Record); 1770 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1771 assert(!Enum->getPreviousDeclaration() && 1772 "enum has previous declaration"); 1773 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Enum); 1774 } else if (const UnresolvedUsingTypenameDecl *Using = 1775 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1776 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1777 } else 1778 llvm_unreachable("TypeDecl without a type?"); 1779 1780 Types.push_back(Decl->TypeForDecl); 1781 return QualType(Decl->TypeForDecl, 0); 1782} 1783 1784/// getTypedefType - Return the unique reference to the type for the 1785/// specified typename decl. 1786QualType ASTContext::getTypedefType(const TypedefDecl *Decl) { 1787 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1788 1789 QualType Canonical = getCanonicalType(Decl->getUnderlyingType()); 1790 Decl->TypeForDecl = new(*this, TypeAlignment) 1791 TypedefType(Type::Typedef, Decl, Canonical); 1792 Types.push_back(Decl->TypeForDecl); 1793 return QualType(Decl->TypeForDecl, 0); 1794} 1795 1796/// \brief Retrieve a substitution-result type. 1797QualType 1798ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1799 QualType Replacement) { 1800 assert(Replacement.isCanonical() 1801 && "replacement types must always be canonical"); 1802 1803 llvm::FoldingSetNodeID ID; 1804 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1805 void *InsertPos = 0; 1806 SubstTemplateTypeParmType *SubstParm 1807 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1808 1809 if (!SubstParm) { 1810 SubstParm = new (*this, TypeAlignment) 1811 SubstTemplateTypeParmType(Parm, Replacement); 1812 Types.push_back(SubstParm); 1813 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1814 } 1815 1816 return QualType(SubstParm, 0); 1817} 1818 1819/// \brief Retrieve the template type parameter type for a template 1820/// parameter or parameter pack with the given depth, index, and (optionally) 1821/// name. 1822QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1823 bool ParameterPack, 1824 IdentifierInfo *Name) { 1825 llvm::FoldingSetNodeID ID; 1826 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1827 void *InsertPos = 0; 1828 TemplateTypeParmType *TypeParm 1829 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1830 1831 if (TypeParm) 1832 return QualType(TypeParm, 0); 1833 1834 if (Name) { 1835 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1836 TypeParm = new (*this, TypeAlignment) 1837 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 1838 1839 TemplateTypeParmType *TypeCheck 1840 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1841 assert(!TypeCheck && "Template type parameter canonical type broken"); 1842 (void)TypeCheck; 1843 } else 1844 TypeParm = new (*this, TypeAlignment) 1845 TemplateTypeParmType(Depth, Index, ParameterPack); 1846 1847 Types.push_back(TypeParm); 1848 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1849 1850 return QualType(TypeParm, 0); 1851} 1852 1853TypeSourceInfo * 1854ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 1855 SourceLocation NameLoc, 1856 const TemplateArgumentListInfo &Args, 1857 QualType CanonType) { 1858 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 1859 1860 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 1861 TemplateSpecializationTypeLoc TL 1862 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 1863 TL.setTemplateNameLoc(NameLoc); 1864 TL.setLAngleLoc(Args.getLAngleLoc()); 1865 TL.setRAngleLoc(Args.getRAngleLoc()); 1866 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 1867 TL.setArgLocInfo(i, Args[i].getLocInfo()); 1868 return DI; 1869} 1870 1871QualType 1872ASTContext::getTemplateSpecializationType(TemplateName Template, 1873 const TemplateArgumentListInfo &Args, 1874 QualType Canon) { 1875 unsigned NumArgs = Args.size(); 1876 1877 llvm::SmallVector<TemplateArgument, 4> ArgVec; 1878 ArgVec.reserve(NumArgs); 1879 for (unsigned i = 0; i != NumArgs; ++i) 1880 ArgVec.push_back(Args[i].getArgument()); 1881 1882 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 1883 Canon); 1884} 1885 1886QualType 1887ASTContext::getTemplateSpecializationType(TemplateName Template, 1888 const TemplateArgument *Args, 1889 unsigned NumArgs, 1890 QualType Canon) { 1891 if (!Canon.isNull()) 1892 Canon = getCanonicalType(Canon); 1893 else { 1894 // Build the canonical template specialization type. 1895 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 1896 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 1897 CanonArgs.reserve(NumArgs); 1898 for (unsigned I = 0; I != NumArgs; ++I) 1899 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 1900 1901 // Determine whether this canonical template specialization type already 1902 // exists. 1903 llvm::FoldingSetNodeID ID; 1904 TemplateSpecializationType::Profile(ID, CanonTemplate, 1905 CanonArgs.data(), NumArgs, *this); 1906 1907 void *InsertPos = 0; 1908 TemplateSpecializationType *Spec 1909 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1910 1911 if (!Spec) { 1912 // Allocate a new canonical template specialization type. 1913 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1914 sizeof(TemplateArgument) * NumArgs), 1915 TypeAlignment); 1916 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 1917 CanonArgs.data(), NumArgs, 1918 Canon); 1919 Types.push_back(Spec); 1920 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1921 } 1922 1923 if (Canon.isNull()) 1924 Canon = QualType(Spec, 0); 1925 assert(Canon->isDependentType() && 1926 "Non-dependent template-id type must have a canonical type"); 1927 } 1928 1929 // Allocate the (non-canonical) template specialization type, but don't 1930 // try to unique it: these types typically have location information that 1931 // we don't unique and don't want to lose. 1932 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1933 sizeof(TemplateArgument) * NumArgs), 1934 TypeAlignment); 1935 TemplateSpecializationType *Spec 1936 = new (Mem) TemplateSpecializationType(Template, 1937 Args, NumArgs, 1938 Canon); 1939 1940 Types.push_back(Spec); 1941 return QualType(Spec, 0); 1942} 1943 1944QualType 1945ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 1946 NestedNameSpecifier *NNS, 1947 QualType NamedType) { 1948 llvm::FoldingSetNodeID ID; 1949 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 1950 1951 void *InsertPos = 0; 1952 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1953 if (T) 1954 return QualType(T, 0); 1955 1956 QualType Canon = NamedType; 1957 if (!Canon.isCanonical()) { 1958 Canon = getCanonicalType(NamedType); 1959 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1960 assert(!CheckT && "Elaborated canonical type broken"); 1961 (void)CheckT; 1962 } 1963 1964 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 1965 Types.push_back(T); 1966 ElaboratedTypes.InsertNode(T, InsertPos); 1967 return QualType(T, 0); 1968} 1969 1970QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 1971 NestedNameSpecifier *NNS, 1972 const IdentifierInfo *Name, 1973 QualType Canon) { 1974 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1975 1976 if (Canon.isNull()) { 1977 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1978 ElaboratedTypeKeyword CanonKeyword = Keyword; 1979 if (Keyword == ETK_None) 1980 CanonKeyword = ETK_Typename; 1981 1982 if (CanonNNS != NNS || CanonKeyword != Keyword) 1983 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 1984 } 1985 1986 llvm::FoldingSetNodeID ID; 1987 DependentNameType::Profile(ID, Keyword, NNS, Name); 1988 1989 void *InsertPos = 0; 1990 DependentNameType *T 1991 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1992 if (T) 1993 return QualType(T, 0); 1994 1995 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 1996 Types.push_back(T); 1997 DependentNameTypes.InsertNode(T, InsertPos); 1998 return QualType(T, 0); 1999} 2000 2001QualType 2002ASTContext::getDependentTemplateSpecializationType( 2003 ElaboratedTypeKeyword Keyword, 2004 NestedNameSpecifier *NNS, 2005 const IdentifierInfo *Name, 2006 const TemplateArgumentListInfo &Args) { 2007 // TODO: avoid this copy 2008 llvm::SmallVector<TemplateArgument, 16> ArgCopy; 2009 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2010 ArgCopy.push_back(Args[I].getArgument()); 2011 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2012 ArgCopy.size(), 2013 ArgCopy.data()); 2014} 2015 2016QualType 2017ASTContext::getDependentTemplateSpecializationType( 2018 ElaboratedTypeKeyword Keyword, 2019 NestedNameSpecifier *NNS, 2020 const IdentifierInfo *Name, 2021 unsigned NumArgs, 2022 const TemplateArgument *Args) { 2023 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2024 2025 llvm::FoldingSetNodeID ID; 2026 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2027 Name, NumArgs, Args); 2028 2029 void *InsertPos = 0; 2030 DependentTemplateSpecializationType *T 2031 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2032 if (T) 2033 return QualType(T, 0); 2034 2035 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2036 2037 ElaboratedTypeKeyword CanonKeyword = Keyword; 2038 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2039 2040 bool AnyNonCanonArgs = false; 2041 llvm::SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2042 for (unsigned I = 0; I != NumArgs; ++I) { 2043 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2044 if (!CanonArgs[I].structurallyEquals(Args[I])) 2045 AnyNonCanonArgs = true; 2046 } 2047 2048 QualType Canon; 2049 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2050 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2051 Name, NumArgs, 2052 CanonArgs.data()); 2053 2054 // Find the insert position again. 2055 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2056 } 2057 2058 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2059 sizeof(TemplateArgument) * NumArgs), 2060 TypeAlignment); 2061 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2062 Name, NumArgs, Args, Canon); 2063 Types.push_back(T); 2064 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2065 return QualType(T, 0); 2066} 2067 2068/// CmpProtocolNames - Comparison predicate for sorting protocols 2069/// alphabetically. 2070static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2071 const ObjCProtocolDecl *RHS) { 2072 return LHS->getDeclName() < RHS->getDeclName(); 2073} 2074 2075static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2076 unsigned NumProtocols) { 2077 if (NumProtocols == 0) return true; 2078 2079 for (unsigned i = 1; i != NumProtocols; ++i) 2080 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2081 return false; 2082 return true; 2083} 2084 2085static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2086 unsigned &NumProtocols) { 2087 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2088 2089 // Sort protocols, keyed by name. 2090 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2091 2092 // Remove duplicates. 2093 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2094 NumProtocols = ProtocolsEnd-Protocols; 2095} 2096 2097QualType ASTContext::getObjCObjectType(QualType BaseType, 2098 ObjCProtocolDecl * const *Protocols, 2099 unsigned NumProtocols) { 2100 // If the base type is an interface and there aren't any protocols 2101 // to add, then the interface type will do just fine. 2102 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2103 return BaseType; 2104 2105 // Look in the folding set for an existing type. 2106 llvm::FoldingSetNodeID ID; 2107 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2108 void *InsertPos = 0; 2109 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2110 return QualType(QT, 0); 2111 2112 // Build the canonical type, which has the canonical base type and 2113 // a sorted-and-uniqued list of protocols. 2114 QualType Canonical; 2115 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2116 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2117 if (!ProtocolsSorted) { 2118 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2119 Protocols + NumProtocols); 2120 unsigned UniqueCount = NumProtocols; 2121 2122 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2123 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2124 &Sorted[0], UniqueCount); 2125 } else { 2126 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2127 Protocols, NumProtocols); 2128 } 2129 2130 // Regenerate InsertPos. 2131 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2132 } 2133 2134 unsigned Size = sizeof(ObjCObjectTypeImpl); 2135 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2136 void *Mem = Allocate(Size, TypeAlignment); 2137 ObjCObjectTypeImpl *T = 2138 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2139 2140 Types.push_back(T); 2141 ObjCObjectTypes.InsertNode(T, InsertPos); 2142 return QualType(T, 0); 2143} 2144 2145/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2146/// the given object type. 2147QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) { 2148 llvm::FoldingSetNodeID ID; 2149 ObjCObjectPointerType::Profile(ID, ObjectT); 2150 2151 void *InsertPos = 0; 2152 if (ObjCObjectPointerType *QT = 2153 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2154 return QualType(QT, 0); 2155 2156 // Find the canonical object type. 2157 QualType Canonical; 2158 if (!ObjectT.isCanonical()) { 2159 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2160 2161 // Regenerate InsertPos. 2162 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2163 } 2164 2165 // No match. 2166 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2167 ObjCObjectPointerType *QType = 2168 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2169 2170 Types.push_back(QType); 2171 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2172 return QualType(QType, 0); 2173} 2174 2175/// getObjCInterfaceType - Return the unique reference to the type for the 2176/// specified ObjC interface decl. The list of protocols is optional. 2177QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) { 2178 if (Decl->TypeForDecl) 2179 return QualType(Decl->TypeForDecl, 0); 2180 2181 // FIXME: redeclarations? 2182 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2183 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2184 Decl->TypeForDecl = T; 2185 Types.push_back(T); 2186 return QualType(T, 0); 2187} 2188 2189/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2190/// TypeOfExprType AST's (since expression's are never shared). For example, 2191/// multiple declarations that refer to "typeof(x)" all contain different 2192/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2193/// on canonical type's (which are always unique). 2194QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2195 TypeOfExprType *toe; 2196 if (tofExpr->isTypeDependent()) { 2197 llvm::FoldingSetNodeID ID; 2198 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2199 2200 void *InsertPos = 0; 2201 DependentTypeOfExprType *Canon 2202 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2203 if (Canon) { 2204 // We already have a "canonical" version of an identical, dependent 2205 // typeof(expr) type. Use that as our canonical type. 2206 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2207 QualType((TypeOfExprType*)Canon, 0)); 2208 } 2209 else { 2210 // Build a new, canonical typeof(expr) type. 2211 Canon 2212 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2213 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2214 toe = Canon; 2215 } 2216 } else { 2217 QualType Canonical = getCanonicalType(tofExpr->getType()); 2218 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2219 } 2220 Types.push_back(toe); 2221 return QualType(toe, 0); 2222} 2223 2224/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2225/// TypeOfType AST's. The only motivation to unique these nodes would be 2226/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2227/// an issue. This doesn't effect the type checker, since it operates 2228/// on canonical type's (which are always unique). 2229QualType ASTContext::getTypeOfType(QualType tofType) { 2230 QualType Canonical = getCanonicalType(tofType); 2231 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2232 Types.push_back(tot); 2233 return QualType(tot, 0); 2234} 2235 2236/// getDecltypeForExpr - Given an expr, will return the decltype for that 2237/// expression, according to the rules in C++0x [dcl.type.simple]p4 2238static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2239 if (e->isTypeDependent()) 2240 return Context.DependentTy; 2241 2242 // If e is an id expression or a class member access, decltype(e) is defined 2243 // as the type of the entity named by e. 2244 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2245 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2246 return VD->getType(); 2247 } 2248 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2249 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2250 return FD->getType(); 2251 } 2252 // If e is a function call or an invocation of an overloaded operator, 2253 // (parentheses around e are ignored), decltype(e) is defined as the 2254 // return type of that function. 2255 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2256 return CE->getCallReturnType(); 2257 2258 QualType T = e->getType(); 2259 2260 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2261 // defined as T&, otherwise decltype(e) is defined as T. 2262 if (e->isLvalue(Context) == Expr::LV_Valid) 2263 T = Context.getLValueReferenceType(T); 2264 2265 return T; 2266} 2267 2268/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2269/// DecltypeType AST's. The only motivation to unique these nodes would be 2270/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2271/// an issue. This doesn't effect the type checker, since it operates 2272/// on canonical type's (which are always unique). 2273QualType ASTContext::getDecltypeType(Expr *e) { 2274 DecltypeType *dt; 2275 if (e->isTypeDependent()) { 2276 llvm::FoldingSetNodeID ID; 2277 DependentDecltypeType::Profile(ID, *this, e); 2278 2279 void *InsertPos = 0; 2280 DependentDecltypeType *Canon 2281 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2282 if (Canon) { 2283 // We already have a "canonical" version of an equivalent, dependent 2284 // decltype type. Use that as our canonical type. 2285 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2286 QualType((DecltypeType*)Canon, 0)); 2287 } 2288 else { 2289 // Build a new, canonical typeof(expr) type. 2290 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2291 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2292 dt = Canon; 2293 } 2294 } else { 2295 QualType T = getDecltypeForExpr(e, *this); 2296 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2297 } 2298 Types.push_back(dt); 2299 return QualType(dt, 0); 2300} 2301 2302/// getTagDeclType - Return the unique reference to the type for the 2303/// specified TagDecl (struct/union/class/enum) decl. 2304QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2305 assert (Decl); 2306 // FIXME: What is the design on getTagDeclType when it requires casting 2307 // away const? mutable? 2308 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2309} 2310 2311/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2312/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2313/// needs to agree with the definition in <stddef.h>. 2314CanQualType ASTContext::getSizeType() const { 2315 return getFromTargetType(Target.getSizeType()); 2316} 2317 2318/// getSignedWCharType - Return the type of "signed wchar_t". 2319/// Used when in C++, as a GCC extension. 2320QualType ASTContext::getSignedWCharType() const { 2321 // FIXME: derive from "Target" ? 2322 return WCharTy; 2323} 2324 2325/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2326/// Used when in C++, as a GCC extension. 2327QualType ASTContext::getUnsignedWCharType() const { 2328 // FIXME: derive from "Target" ? 2329 return UnsignedIntTy; 2330} 2331 2332/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2333/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2334QualType ASTContext::getPointerDiffType() const { 2335 return getFromTargetType(Target.getPtrDiffType(0)); 2336} 2337 2338//===----------------------------------------------------------------------===// 2339// Type Operators 2340//===----------------------------------------------------------------------===// 2341 2342CanQualType ASTContext::getCanonicalParamType(QualType T) { 2343 // Push qualifiers into arrays, and then discard any remaining 2344 // qualifiers. 2345 T = getCanonicalType(T); 2346 const Type *Ty = T.getTypePtr(); 2347 2348 QualType Result; 2349 if (isa<ArrayType>(Ty)) { 2350 Result = getArrayDecayedType(QualType(Ty,0)); 2351 } else if (isa<FunctionType>(Ty)) { 2352 Result = getPointerType(QualType(Ty, 0)); 2353 } else { 2354 Result = QualType(Ty, 0); 2355 } 2356 2357 return CanQualType::CreateUnsafe(Result); 2358} 2359 2360/// getCanonicalType - Return the canonical (structural) type corresponding to 2361/// the specified potentially non-canonical type. The non-canonical version 2362/// of a type may have many "decorated" versions of types. Decorators can 2363/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2364/// to be free of any of these, allowing two canonical types to be compared 2365/// for exact equality with a simple pointer comparison. 2366CanQualType ASTContext::getCanonicalType(QualType T) { 2367 QualifierCollector Quals; 2368 const Type *Ptr = Quals.strip(T); 2369 QualType CanType = Ptr->getCanonicalTypeInternal(); 2370 2371 // The canonical internal type will be the canonical type *except* 2372 // that we push type qualifiers down through array types. 2373 2374 // If there are no new qualifiers to push down, stop here. 2375 if (!Quals.hasQualifiers()) 2376 return CanQualType::CreateUnsafe(CanType); 2377 2378 // If the type qualifiers are on an array type, get the canonical 2379 // type of the array with the qualifiers applied to the element 2380 // type. 2381 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2382 if (!AT) 2383 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2384 2385 // Get the canonical version of the element with the extra qualifiers on it. 2386 // This can recursively sink qualifiers through multiple levels of arrays. 2387 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2388 NewEltTy = getCanonicalType(NewEltTy); 2389 2390 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2391 return CanQualType::CreateUnsafe( 2392 getConstantArrayType(NewEltTy, CAT->getSize(), 2393 CAT->getSizeModifier(), 2394 CAT->getIndexTypeCVRQualifiers())); 2395 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2396 return CanQualType::CreateUnsafe( 2397 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2398 IAT->getIndexTypeCVRQualifiers())); 2399 2400 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2401 return CanQualType::CreateUnsafe( 2402 getDependentSizedArrayType(NewEltTy, 2403 DSAT->getSizeExpr() ? 2404 DSAT->getSizeExpr()->Retain() : 0, 2405 DSAT->getSizeModifier(), 2406 DSAT->getIndexTypeCVRQualifiers(), 2407 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2408 2409 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2410 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2411 VAT->getSizeExpr() ? 2412 VAT->getSizeExpr()->Retain() : 0, 2413 VAT->getSizeModifier(), 2414 VAT->getIndexTypeCVRQualifiers(), 2415 VAT->getBracketsRange())); 2416} 2417 2418QualType ASTContext::getUnqualifiedArrayType(QualType T, 2419 Qualifiers &Quals) { 2420 Quals = T.getQualifiers(); 2421 const ArrayType *AT = getAsArrayType(T); 2422 if (!AT) { 2423 return T.getUnqualifiedType(); 2424 } 2425 2426 QualType Elt = AT->getElementType(); 2427 QualType UnqualElt = getUnqualifiedArrayType(Elt, Quals); 2428 if (Elt == UnqualElt) 2429 return T; 2430 2431 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 2432 return getConstantArrayType(UnqualElt, CAT->getSize(), 2433 CAT->getSizeModifier(), 0); 2434 } 2435 2436 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 2437 return getIncompleteArrayType(UnqualElt, IAT->getSizeModifier(), 0); 2438 } 2439 2440 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 2441 return getVariableArrayType(UnqualElt, 2442 VAT->getSizeExpr() ? 2443 VAT->getSizeExpr()->Retain() : 0, 2444 VAT->getSizeModifier(), 2445 VAT->getIndexTypeCVRQualifiers(), 2446 VAT->getBracketsRange()); 2447 } 2448 2449 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 2450 return getDependentSizedArrayType(UnqualElt, DSAT->getSizeExpr()->Retain(), 2451 DSAT->getSizeModifier(), 0, 2452 SourceRange()); 2453} 2454 2455/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 2456/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 2457/// they point to and return true. If T1 and T2 aren't pointer types 2458/// or pointer-to-member types, or if they are not similar at this 2459/// level, returns false and leaves T1 and T2 unchanged. Top-level 2460/// qualifiers on T1 and T2 are ignored. This function will typically 2461/// be called in a loop that successively "unwraps" pointer and 2462/// pointer-to-member types to compare them at each level. 2463bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 2464 const PointerType *T1PtrType = T1->getAs<PointerType>(), 2465 *T2PtrType = T2->getAs<PointerType>(); 2466 if (T1PtrType && T2PtrType) { 2467 T1 = T1PtrType->getPointeeType(); 2468 T2 = T2PtrType->getPointeeType(); 2469 return true; 2470 } 2471 2472 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 2473 *T2MPType = T2->getAs<MemberPointerType>(); 2474 if (T1MPType && T2MPType && 2475 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 2476 QualType(T2MPType->getClass(), 0))) { 2477 T1 = T1MPType->getPointeeType(); 2478 T2 = T2MPType->getPointeeType(); 2479 return true; 2480 } 2481 2482 if (getLangOptions().ObjC1) { 2483 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 2484 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 2485 if (T1OPType && T2OPType) { 2486 T1 = T1OPType->getPointeeType(); 2487 T2 = T2OPType->getPointeeType(); 2488 return true; 2489 } 2490 } 2491 2492 // FIXME: Block pointers, too? 2493 2494 return false; 2495} 2496 2497DeclarationName ASTContext::getNameForTemplate(TemplateName Name) { 2498 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2499 return TD->getDeclName(); 2500 2501 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2502 if (DTN->isIdentifier()) { 2503 return DeclarationNames.getIdentifier(DTN->getIdentifier()); 2504 } else { 2505 return DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2506 } 2507 } 2508 2509 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2510 assert(Storage); 2511 return (*Storage->begin())->getDeclName(); 2512} 2513 2514TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2515 if (TemplateDecl *Template = Name.getAsTemplateDecl()) { 2516 if (TemplateTemplateParmDecl *TTP 2517 = dyn_cast<TemplateTemplateParmDecl>(Template)) 2518 Template = getCanonicalTemplateTemplateParmDecl(TTP); 2519 2520 // The canonical template name is the canonical template declaration. 2521 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2522 } 2523 2524 assert(!Name.getAsOverloadedTemplate()); 2525 2526 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2527 assert(DTN && "Non-dependent template names must refer to template decls."); 2528 return DTN->CanonicalTemplateName; 2529} 2530 2531bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2532 X = getCanonicalTemplateName(X); 2533 Y = getCanonicalTemplateName(Y); 2534 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2535} 2536 2537TemplateArgument 2538ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2539 switch (Arg.getKind()) { 2540 case TemplateArgument::Null: 2541 return Arg; 2542 2543 case TemplateArgument::Expression: 2544 return Arg; 2545 2546 case TemplateArgument::Declaration: 2547 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2548 2549 case TemplateArgument::Template: 2550 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2551 2552 case TemplateArgument::Integral: 2553 return TemplateArgument(*Arg.getAsIntegral(), 2554 getCanonicalType(Arg.getIntegralType())); 2555 2556 case TemplateArgument::Type: 2557 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2558 2559 case TemplateArgument::Pack: { 2560 // FIXME: Allocate in ASTContext 2561 TemplateArgument *CanonArgs = new TemplateArgument[Arg.pack_size()]; 2562 unsigned Idx = 0; 2563 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2564 AEnd = Arg.pack_end(); 2565 A != AEnd; (void)++A, ++Idx) 2566 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2567 2568 TemplateArgument Result; 2569 Result.setArgumentPack(CanonArgs, Arg.pack_size(), false); 2570 return Result; 2571 } 2572 } 2573 2574 // Silence GCC warning 2575 assert(false && "Unhandled template argument kind"); 2576 return TemplateArgument(); 2577} 2578 2579NestedNameSpecifier * 2580ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2581 if (!NNS) 2582 return 0; 2583 2584 switch (NNS->getKind()) { 2585 case NestedNameSpecifier::Identifier: 2586 // Canonicalize the prefix but keep the identifier the same. 2587 return NestedNameSpecifier::Create(*this, 2588 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2589 NNS->getAsIdentifier()); 2590 2591 case NestedNameSpecifier::Namespace: 2592 // A namespace is canonical; build a nested-name-specifier with 2593 // this namespace and no prefix. 2594 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2595 2596 case NestedNameSpecifier::TypeSpec: 2597 case NestedNameSpecifier::TypeSpecWithTemplate: { 2598 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2599 return NestedNameSpecifier::Create(*this, 0, 2600 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2601 T.getTypePtr()); 2602 } 2603 2604 case NestedNameSpecifier::Global: 2605 // The global specifier is canonical and unique. 2606 return NNS; 2607 } 2608 2609 // Required to silence a GCC warning 2610 return 0; 2611} 2612 2613 2614const ArrayType *ASTContext::getAsArrayType(QualType T) { 2615 // Handle the non-qualified case efficiently. 2616 if (!T.hasLocalQualifiers()) { 2617 // Handle the common positive case fast. 2618 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2619 return AT; 2620 } 2621 2622 // Handle the common negative case fast. 2623 QualType CType = T->getCanonicalTypeInternal(); 2624 if (!isa<ArrayType>(CType)) 2625 return 0; 2626 2627 // Apply any qualifiers from the array type to the element type. This 2628 // implements C99 6.7.3p8: "If the specification of an array type includes 2629 // any type qualifiers, the element type is so qualified, not the array type." 2630 2631 // If we get here, we either have type qualifiers on the type, or we have 2632 // sugar such as a typedef in the way. If we have type qualifiers on the type 2633 // we must propagate them down into the element type. 2634 2635 QualifierCollector Qs; 2636 const Type *Ty = Qs.strip(T.getDesugaredType()); 2637 2638 // If we have a simple case, just return now. 2639 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2640 if (ATy == 0 || Qs.empty()) 2641 return ATy; 2642 2643 // Otherwise, we have an array and we have qualifiers on it. Push the 2644 // qualifiers into the array element type and return a new array type. 2645 // Get the canonical version of the element with the extra qualifiers on it. 2646 // This can recursively sink qualifiers through multiple levels of arrays. 2647 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2648 2649 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2650 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2651 CAT->getSizeModifier(), 2652 CAT->getIndexTypeCVRQualifiers())); 2653 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2654 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2655 IAT->getSizeModifier(), 2656 IAT->getIndexTypeCVRQualifiers())); 2657 2658 if (const DependentSizedArrayType *DSAT 2659 = dyn_cast<DependentSizedArrayType>(ATy)) 2660 return cast<ArrayType>( 2661 getDependentSizedArrayType(NewEltTy, 2662 DSAT->getSizeExpr() ? 2663 DSAT->getSizeExpr()->Retain() : 0, 2664 DSAT->getSizeModifier(), 2665 DSAT->getIndexTypeCVRQualifiers(), 2666 DSAT->getBracketsRange())); 2667 2668 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2669 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2670 VAT->getSizeExpr() ? 2671 VAT->getSizeExpr()->Retain() : 0, 2672 VAT->getSizeModifier(), 2673 VAT->getIndexTypeCVRQualifiers(), 2674 VAT->getBracketsRange())); 2675} 2676 2677 2678/// getArrayDecayedType - Return the properly qualified result of decaying the 2679/// specified array type to a pointer. This operation is non-trivial when 2680/// handling typedefs etc. The canonical type of "T" must be an array type, 2681/// this returns a pointer to a properly qualified element of the array. 2682/// 2683/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2684QualType ASTContext::getArrayDecayedType(QualType Ty) { 2685 // Get the element type with 'getAsArrayType' so that we don't lose any 2686 // typedefs in the element type of the array. This also handles propagation 2687 // of type qualifiers from the array type into the element type if present 2688 // (C99 6.7.3p8). 2689 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2690 assert(PrettyArrayType && "Not an array type!"); 2691 2692 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2693 2694 // int x[restrict 4] -> int *restrict 2695 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2696} 2697 2698QualType ASTContext::getBaseElementType(QualType QT) { 2699 QualifierCollector Qs; 2700 while (const ArrayType *AT = getAsArrayType(QualType(Qs.strip(QT), 0))) 2701 QT = AT->getElementType(); 2702 return Qs.apply(QT); 2703} 2704 2705QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2706 QualType ElemTy = AT->getElementType(); 2707 2708 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2709 return getBaseElementType(AT); 2710 2711 return ElemTy; 2712} 2713 2714/// getConstantArrayElementCount - Returns number of constant array elements. 2715uint64_t 2716ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2717 uint64_t ElementCount = 1; 2718 do { 2719 ElementCount *= CA->getSize().getZExtValue(); 2720 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2721 } while (CA); 2722 return ElementCount; 2723} 2724 2725/// getFloatingRank - Return a relative rank for floating point types. 2726/// This routine will assert if passed a built-in type that isn't a float. 2727static FloatingRank getFloatingRank(QualType T) { 2728 if (const ComplexType *CT = T->getAs<ComplexType>()) 2729 return getFloatingRank(CT->getElementType()); 2730 2731 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2732 switch (T->getAs<BuiltinType>()->getKind()) { 2733 default: assert(0 && "getFloatingRank(): not a floating type"); 2734 case BuiltinType::Float: return FloatRank; 2735 case BuiltinType::Double: return DoubleRank; 2736 case BuiltinType::LongDouble: return LongDoubleRank; 2737 } 2738} 2739 2740/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2741/// point or a complex type (based on typeDomain/typeSize). 2742/// 'typeDomain' is a real floating point or complex type. 2743/// 'typeSize' is a real floating point or complex type. 2744QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2745 QualType Domain) const { 2746 FloatingRank EltRank = getFloatingRank(Size); 2747 if (Domain->isComplexType()) { 2748 switch (EltRank) { 2749 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2750 case FloatRank: return FloatComplexTy; 2751 case DoubleRank: return DoubleComplexTy; 2752 case LongDoubleRank: return LongDoubleComplexTy; 2753 } 2754 } 2755 2756 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2757 switch (EltRank) { 2758 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2759 case FloatRank: return FloatTy; 2760 case DoubleRank: return DoubleTy; 2761 case LongDoubleRank: return LongDoubleTy; 2762 } 2763} 2764 2765/// getFloatingTypeOrder - Compare the rank of the two specified floating 2766/// point types, ignoring the domain of the type (i.e. 'double' == 2767/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2768/// LHS < RHS, return -1. 2769int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2770 FloatingRank LHSR = getFloatingRank(LHS); 2771 FloatingRank RHSR = getFloatingRank(RHS); 2772 2773 if (LHSR == RHSR) 2774 return 0; 2775 if (LHSR > RHSR) 2776 return 1; 2777 return -1; 2778} 2779 2780/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2781/// routine will assert if passed a built-in type that isn't an integer or enum, 2782/// or if it is not canonicalized. 2783unsigned ASTContext::getIntegerRank(Type *T) { 2784 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2785 if (EnumType* ET = dyn_cast<EnumType>(T)) 2786 T = ET->getDecl()->getPromotionType().getTypePtr(); 2787 2788 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2789 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2790 2791 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2792 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2793 2794 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2795 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2796 2797 switch (cast<BuiltinType>(T)->getKind()) { 2798 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2799 case BuiltinType::Bool: 2800 return 1 + (getIntWidth(BoolTy) << 3); 2801 case BuiltinType::Char_S: 2802 case BuiltinType::Char_U: 2803 case BuiltinType::SChar: 2804 case BuiltinType::UChar: 2805 return 2 + (getIntWidth(CharTy) << 3); 2806 case BuiltinType::Short: 2807 case BuiltinType::UShort: 2808 return 3 + (getIntWidth(ShortTy) << 3); 2809 case BuiltinType::Int: 2810 case BuiltinType::UInt: 2811 return 4 + (getIntWidth(IntTy) << 3); 2812 case BuiltinType::Long: 2813 case BuiltinType::ULong: 2814 return 5 + (getIntWidth(LongTy) << 3); 2815 case BuiltinType::LongLong: 2816 case BuiltinType::ULongLong: 2817 return 6 + (getIntWidth(LongLongTy) << 3); 2818 case BuiltinType::Int128: 2819 case BuiltinType::UInt128: 2820 return 7 + (getIntWidth(Int128Ty) << 3); 2821 } 2822} 2823 2824/// \brief Whether this is a promotable bitfield reference according 2825/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 2826/// 2827/// \returns the type this bit-field will promote to, or NULL if no 2828/// promotion occurs. 2829QualType ASTContext::isPromotableBitField(Expr *E) { 2830 if (E->isTypeDependent() || E->isValueDependent()) 2831 return QualType(); 2832 2833 FieldDecl *Field = E->getBitField(); 2834 if (!Field) 2835 return QualType(); 2836 2837 QualType FT = Field->getType(); 2838 2839 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 2840 uint64_t BitWidth = BitWidthAP.getZExtValue(); 2841 uint64_t IntSize = getTypeSize(IntTy); 2842 // GCC extension compatibility: if the bit-field size is less than or equal 2843 // to the size of int, it gets promoted no matter what its type is. 2844 // For instance, unsigned long bf : 4 gets promoted to signed int. 2845 if (BitWidth < IntSize) 2846 return IntTy; 2847 2848 if (BitWidth == IntSize) 2849 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 2850 2851 // Types bigger than int are not subject to promotions, and therefore act 2852 // like the base type. 2853 // FIXME: This doesn't quite match what gcc does, but what gcc does here 2854 // is ridiculous. 2855 return QualType(); 2856} 2857 2858/// getPromotedIntegerType - Returns the type that Promotable will 2859/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 2860/// integer type. 2861QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 2862 assert(!Promotable.isNull()); 2863 assert(Promotable->isPromotableIntegerType()); 2864 if (const EnumType *ET = Promotable->getAs<EnumType>()) 2865 return ET->getDecl()->getPromotionType(); 2866 if (Promotable->isSignedIntegerType()) 2867 return IntTy; 2868 uint64_t PromotableSize = getTypeSize(Promotable); 2869 uint64_t IntSize = getTypeSize(IntTy); 2870 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 2871 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 2872} 2873 2874/// getIntegerTypeOrder - Returns the highest ranked integer type: 2875/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2876/// LHS < RHS, return -1. 2877int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2878 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2879 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2880 if (LHSC == RHSC) return 0; 2881 2882 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2883 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2884 2885 unsigned LHSRank = getIntegerRank(LHSC); 2886 unsigned RHSRank = getIntegerRank(RHSC); 2887 2888 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2889 if (LHSRank == RHSRank) return 0; 2890 return LHSRank > RHSRank ? 1 : -1; 2891 } 2892 2893 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2894 if (LHSUnsigned) { 2895 // If the unsigned [LHS] type is larger, return it. 2896 if (LHSRank >= RHSRank) 2897 return 1; 2898 2899 // If the signed type can represent all values of the unsigned type, it 2900 // wins. Because we are dealing with 2's complement and types that are 2901 // powers of two larger than each other, this is always safe. 2902 return -1; 2903 } 2904 2905 // If the unsigned [RHS] type is larger, return it. 2906 if (RHSRank >= LHSRank) 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 2915static RecordDecl * 2916CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 2917 SourceLocation L, IdentifierInfo *Id) { 2918 if (Ctx.getLangOptions().CPlusPlus) 2919 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 2920 else 2921 return RecordDecl::Create(Ctx, TK, DC, L, Id); 2922} 2923 2924// getCFConstantStringType - Return the type used for constant CFStrings. 2925QualType ASTContext::getCFConstantStringType() { 2926 if (!CFConstantStringTypeDecl) { 2927 CFConstantStringTypeDecl = 2928 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2929 &Idents.get("NSConstantString")); 2930 CFConstantStringTypeDecl->startDefinition(); 2931 2932 QualType FieldTypes[4]; 2933 2934 // const int *isa; 2935 FieldTypes[0] = getPointerType(IntTy.withConst()); 2936 // int flags; 2937 FieldTypes[1] = IntTy; 2938 // const char *str; 2939 FieldTypes[2] = getPointerType(CharTy.withConst()); 2940 // long length; 2941 FieldTypes[3] = LongTy; 2942 2943 // Create fields 2944 for (unsigned i = 0; i < 4; ++i) { 2945 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2946 SourceLocation(), 0, 2947 FieldTypes[i], /*TInfo=*/0, 2948 /*BitWidth=*/0, 2949 /*Mutable=*/false); 2950 Field->setAccess(AS_public); 2951 CFConstantStringTypeDecl->addDecl(Field); 2952 } 2953 2954 CFConstantStringTypeDecl->completeDefinition(); 2955 } 2956 2957 return getTagDeclType(CFConstantStringTypeDecl); 2958} 2959 2960void ASTContext::setCFConstantStringType(QualType T) { 2961 const RecordType *Rec = T->getAs<RecordType>(); 2962 assert(Rec && "Invalid CFConstantStringType"); 2963 CFConstantStringTypeDecl = Rec->getDecl(); 2964} 2965 2966// getNSConstantStringType - Return the type used for constant NSStrings. 2967QualType ASTContext::getNSConstantStringType() { 2968 if (!NSConstantStringTypeDecl) { 2969 NSConstantStringTypeDecl = 2970 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2971 &Idents.get("__builtin_NSString")); 2972 NSConstantStringTypeDecl->startDefinition(); 2973 2974 QualType FieldTypes[3]; 2975 2976 // const int *isa; 2977 FieldTypes[0] = getPointerType(IntTy.withConst()); 2978 // const char *str; 2979 FieldTypes[1] = getPointerType(CharTy.withConst()); 2980 // unsigned int length; 2981 FieldTypes[2] = UnsignedIntTy; 2982 2983 // Create fields 2984 for (unsigned i = 0; i < 3; ++i) { 2985 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 2986 SourceLocation(), 0, 2987 FieldTypes[i], /*TInfo=*/0, 2988 /*BitWidth=*/0, 2989 /*Mutable=*/false); 2990 Field->setAccess(AS_public); 2991 NSConstantStringTypeDecl->addDecl(Field); 2992 } 2993 2994 NSConstantStringTypeDecl->completeDefinition(); 2995 } 2996 2997 return getTagDeclType(NSConstantStringTypeDecl); 2998} 2999 3000void ASTContext::setNSConstantStringType(QualType T) { 3001 const RecordType *Rec = T->getAs<RecordType>(); 3002 assert(Rec && "Invalid NSConstantStringType"); 3003 NSConstantStringTypeDecl = Rec->getDecl(); 3004} 3005 3006QualType ASTContext::getObjCFastEnumerationStateType() { 3007 if (!ObjCFastEnumerationStateTypeDecl) { 3008 ObjCFastEnumerationStateTypeDecl = 3009 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3010 &Idents.get("__objcFastEnumerationState")); 3011 ObjCFastEnumerationStateTypeDecl->startDefinition(); 3012 3013 QualType FieldTypes[] = { 3014 UnsignedLongTy, 3015 getPointerType(ObjCIdTypedefType), 3016 getPointerType(UnsignedLongTy), 3017 getConstantArrayType(UnsignedLongTy, 3018 llvm::APInt(32, 5), ArrayType::Normal, 0) 3019 }; 3020 3021 for (size_t i = 0; i < 4; ++i) { 3022 FieldDecl *Field = FieldDecl::Create(*this, 3023 ObjCFastEnumerationStateTypeDecl, 3024 SourceLocation(), 0, 3025 FieldTypes[i], /*TInfo=*/0, 3026 /*BitWidth=*/0, 3027 /*Mutable=*/false); 3028 Field->setAccess(AS_public); 3029 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 3030 } 3031 if (getLangOptions().CPlusPlus) 3032 if (CXXRecordDecl *CXXRD = 3033 dyn_cast<CXXRecordDecl>(ObjCFastEnumerationStateTypeDecl)) 3034 CXXRD->setEmpty(false); 3035 3036 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 3037 } 3038 3039 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 3040} 3041 3042QualType ASTContext::getBlockDescriptorType() { 3043 if (BlockDescriptorType) 3044 return getTagDeclType(BlockDescriptorType); 3045 3046 RecordDecl *T; 3047 // FIXME: Needs the FlagAppleBlock bit. 3048 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3049 &Idents.get("__block_descriptor")); 3050 T->startDefinition(); 3051 3052 QualType FieldTypes[] = { 3053 UnsignedLongTy, 3054 UnsignedLongTy, 3055 }; 3056 3057 const char *FieldNames[] = { 3058 "reserved", 3059 "Size" 3060 }; 3061 3062 for (size_t i = 0; i < 2; ++i) { 3063 FieldDecl *Field = FieldDecl::Create(*this, 3064 T, 3065 SourceLocation(), 3066 &Idents.get(FieldNames[i]), 3067 FieldTypes[i], /*TInfo=*/0, 3068 /*BitWidth=*/0, 3069 /*Mutable=*/false); 3070 Field->setAccess(AS_public); 3071 T->addDecl(Field); 3072 } 3073 3074 T->completeDefinition(); 3075 3076 BlockDescriptorType = T; 3077 3078 return getTagDeclType(BlockDescriptorType); 3079} 3080 3081void ASTContext::setBlockDescriptorType(QualType T) { 3082 const RecordType *Rec = T->getAs<RecordType>(); 3083 assert(Rec && "Invalid BlockDescriptorType"); 3084 BlockDescriptorType = Rec->getDecl(); 3085} 3086 3087QualType ASTContext::getBlockDescriptorExtendedType() { 3088 if (BlockDescriptorExtendedType) 3089 return getTagDeclType(BlockDescriptorExtendedType); 3090 3091 RecordDecl *T; 3092 // FIXME: Needs the FlagAppleBlock bit. 3093 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3094 &Idents.get("__block_descriptor_withcopydispose")); 3095 T->startDefinition(); 3096 3097 QualType FieldTypes[] = { 3098 UnsignedLongTy, 3099 UnsignedLongTy, 3100 getPointerType(VoidPtrTy), 3101 getPointerType(VoidPtrTy) 3102 }; 3103 3104 const char *FieldNames[] = { 3105 "reserved", 3106 "Size", 3107 "CopyFuncPtr", 3108 "DestroyFuncPtr" 3109 }; 3110 3111 for (size_t i = 0; i < 4; ++i) { 3112 FieldDecl *Field = FieldDecl::Create(*this, 3113 T, 3114 SourceLocation(), 3115 &Idents.get(FieldNames[i]), 3116 FieldTypes[i], /*TInfo=*/0, 3117 /*BitWidth=*/0, 3118 /*Mutable=*/false); 3119 Field->setAccess(AS_public); 3120 T->addDecl(Field); 3121 } 3122 3123 T->completeDefinition(); 3124 3125 BlockDescriptorExtendedType = T; 3126 3127 return getTagDeclType(BlockDescriptorExtendedType); 3128} 3129 3130void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3131 const RecordType *Rec = T->getAs<RecordType>(); 3132 assert(Rec && "Invalid BlockDescriptorType"); 3133 BlockDescriptorExtendedType = Rec->getDecl(); 3134} 3135 3136bool ASTContext::BlockRequiresCopying(QualType Ty) { 3137 if (Ty->isBlockPointerType()) 3138 return true; 3139 if (isObjCNSObjectType(Ty)) 3140 return true; 3141 if (Ty->isObjCObjectPointerType()) 3142 return true; 3143 return false; 3144} 3145 3146QualType ASTContext::BuildByRefType(const char *DeclName, QualType Ty) { 3147 // type = struct __Block_byref_1_X { 3148 // void *__isa; 3149 // struct __Block_byref_1_X *__forwarding; 3150 // unsigned int __flags; 3151 // unsigned int __size; 3152 // void *__copy_helper; // as needed 3153 // void *__destroy_help // as needed 3154 // int X; 3155 // } * 3156 3157 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3158 3159 // FIXME: Move up 3160 llvm::SmallString<36> Name; 3161 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3162 ++UniqueBlockByRefTypeID << '_' << DeclName; 3163 RecordDecl *T; 3164 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3165 &Idents.get(Name.str())); 3166 T->startDefinition(); 3167 QualType Int32Ty = IntTy; 3168 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3169 QualType FieldTypes[] = { 3170 getPointerType(VoidPtrTy), 3171 getPointerType(getTagDeclType(T)), 3172 Int32Ty, 3173 Int32Ty, 3174 getPointerType(VoidPtrTy), 3175 getPointerType(VoidPtrTy), 3176 Ty 3177 }; 3178 3179 const char *FieldNames[] = { 3180 "__isa", 3181 "__forwarding", 3182 "__flags", 3183 "__size", 3184 "__copy_helper", 3185 "__destroy_helper", 3186 DeclName, 3187 }; 3188 3189 for (size_t i = 0; i < 7; ++i) { 3190 if (!HasCopyAndDispose && i >=4 && i <= 5) 3191 continue; 3192 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3193 &Idents.get(FieldNames[i]), 3194 FieldTypes[i], /*TInfo=*/0, 3195 /*BitWidth=*/0, /*Mutable=*/false); 3196 Field->setAccess(AS_public); 3197 T->addDecl(Field); 3198 } 3199 3200 T->completeDefinition(); 3201 3202 return getPointerType(getTagDeclType(T)); 3203} 3204 3205 3206QualType ASTContext::getBlockParmType( 3207 bool BlockHasCopyDispose, 3208 llvm::SmallVectorImpl<const Expr *> &Layout) { 3209 3210 // FIXME: Move up 3211 llvm::SmallString<36> Name; 3212 llvm::raw_svector_ostream(Name) << "__block_literal_" 3213 << ++UniqueBlockParmTypeID; 3214 RecordDecl *T; 3215 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3216 &Idents.get(Name.str())); 3217 T->startDefinition(); 3218 QualType FieldTypes[] = { 3219 getPointerType(VoidPtrTy), 3220 IntTy, 3221 IntTy, 3222 getPointerType(VoidPtrTy), 3223 (BlockHasCopyDispose ? 3224 getPointerType(getBlockDescriptorExtendedType()) : 3225 getPointerType(getBlockDescriptorType())) 3226 }; 3227 3228 const char *FieldNames[] = { 3229 "__isa", 3230 "__flags", 3231 "__reserved", 3232 "__FuncPtr", 3233 "__descriptor" 3234 }; 3235 3236 for (size_t i = 0; i < 5; ++i) { 3237 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3238 &Idents.get(FieldNames[i]), 3239 FieldTypes[i], /*TInfo=*/0, 3240 /*BitWidth=*/0, /*Mutable=*/false); 3241 Field->setAccess(AS_public); 3242 T->addDecl(Field); 3243 } 3244 3245 for (unsigned i = 0; i < Layout.size(); ++i) { 3246 const Expr *E = Layout[i]; 3247 3248 QualType FieldType = E->getType(); 3249 IdentifierInfo *FieldName = 0; 3250 if (isa<CXXThisExpr>(E)) { 3251 FieldName = &Idents.get("this"); 3252 } else if (const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E)) { 3253 const ValueDecl *D = BDRE->getDecl(); 3254 FieldName = D->getIdentifier(); 3255 if (BDRE->isByRef()) 3256 FieldType = BuildByRefType(D->getNameAsCString(), FieldType); 3257 } else { 3258 // Padding. 3259 assert(isa<ConstantArrayType>(FieldType) && 3260 isa<DeclRefExpr>(E) && 3261 !cast<DeclRefExpr>(E)->getDecl()->getDeclName() && 3262 "doesn't match characteristics of padding decl"); 3263 } 3264 3265 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3266 FieldName, FieldType, /*TInfo=*/0, 3267 /*BitWidth=*/0, /*Mutable=*/false); 3268 Field->setAccess(AS_public); 3269 T->addDecl(Field); 3270 } 3271 3272 T->completeDefinition(); 3273 3274 return getPointerType(getTagDeclType(T)); 3275} 3276 3277void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3278 const RecordType *Rec = T->getAs<RecordType>(); 3279 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3280 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3281} 3282 3283// This returns true if a type has been typedefed to BOOL: 3284// typedef <type> BOOL; 3285static bool isTypeTypedefedAsBOOL(QualType T) { 3286 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3287 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3288 return II->isStr("BOOL"); 3289 3290 return false; 3291} 3292 3293/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3294/// purpose. 3295CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) { 3296 CharUnits sz = getTypeSizeInChars(type); 3297 3298 // Make all integer and enum types at least as large as an int 3299 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 3300 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3301 // Treat arrays as pointers, since that's how they're passed in. 3302 else if (type->isArrayType()) 3303 sz = getTypeSizeInChars(VoidPtrTy); 3304 return sz; 3305} 3306 3307static inline 3308std::string charUnitsToString(const CharUnits &CU) { 3309 return llvm::itostr(CU.getQuantity()); 3310} 3311 3312/// getObjCEncodingForBlockDecl - Return the encoded type for this block 3313/// declaration. 3314void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3315 std::string& S) { 3316 const BlockDecl *Decl = Expr->getBlockDecl(); 3317 QualType BlockTy = 3318 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3319 // Encode result type. 3320 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3321 // Compute size of all parameters. 3322 // Start with computing size of a pointer in number of bytes. 3323 // FIXME: There might(should) be a better way of doing this computation! 3324 SourceLocation Loc; 3325 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3326 CharUnits ParmOffset = PtrSize; 3327 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3328 E = Decl->param_end(); PI != E; ++PI) { 3329 QualType PType = (*PI)->getType(); 3330 CharUnits sz = getObjCEncodingTypeSize(PType); 3331 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3332 ParmOffset += sz; 3333 } 3334 // Size of the argument frame 3335 S += charUnitsToString(ParmOffset); 3336 // Block pointer and offset. 3337 S += "@?0"; 3338 ParmOffset = PtrSize; 3339 3340 // Argument types. 3341 ParmOffset = PtrSize; 3342 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3343 Decl->param_end(); PI != E; ++PI) { 3344 ParmVarDecl *PVDecl = *PI; 3345 QualType PType = PVDecl->getOriginalType(); 3346 if (const ArrayType *AT = 3347 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3348 // Use array's original type only if it has known number of 3349 // elements. 3350 if (!isa<ConstantArrayType>(AT)) 3351 PType = PVDecl->getType(); 3352 } else if (PType->isFunctionType()) 3353 PType = PVDecl->getType(); 3354 getObjCEncodingForType(PType, S); 3355 S += charUnitsToString(ParmOffset); 3356 ParmOffset += getObjCEncodingTypeSize(PType); 3357 } 3358} 3359 3360/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3361/// declaration. 3362void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3363 std::string& S) { 3364 // FIXME: This is not very efficient. 3365 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3366 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3367 // Encode result type. 3368 getObjCEncodingForType(Decl->getResultType(), S); 3369 // Compute size of all parameters. 3370 // Start with computing size of a pointer in number of bytes. 3371 // FIXME: There might(should) be a better way of doing this computation! 3372 SourceLocation Loc; 3373 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3374 // The first two arguments (self and _cmd) are pointers; account for 3375 // their size. 3376 CharUnits ParmOffset = 2 * PtrSize; 3377 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3378 E = Decl->sel_param_end(); PI != E; ++PI) { 3379 QualType PType = (*PI)->getType(); 3380 CharUnits sz = getObjCEncodingTypeSize(PType); 3381 assert (sz.isPositive() && 3382 "getObjCEncodingForMethodDecl - Incomplete param type"); 3383 ParmOffset += sz; 3384 } 3385 S += charUnitsToString(ParmOffset); 3386 S += "@0:"; 3387 S += charUnitsToString(PtrSize); 3388 3389 // Argument types. 3390 ParmOffset = 2 * PtrSize; 3391 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3392 E = Decl->sel_param_end(); PI != E; ++PI) { 3393 ParmVarDecl *PVDecl = *PI; 3394 QualType PType = PVDecl->getOriginalType(); 3395 if (const ArrayType *AT = 3396 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3397 // Use array's original type only if it has known number of 3398 // elements. 3399 if (!isa<ConstantArrayType>(AT)) 3400 PType = PVDecl->getType(); 3401 } else if (PType->isFunctionType()) 3402 PType = PVDecl->getType(); 3403 // Process argument qualifiers for user supplied arguments; such as, 3404 // 'in', 'inout', etc. 3405 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3406 getObjCEncodingForType(PType, S); 3407 S += charUnitsToString(ParmOffset); 3408 ParmOffset += getObjCEncodingTypeSize(PType); 3409 } 3410} 3411 3412/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3413/// property declaration. If non-NULL, Container must be either an 3414/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3415/// NULL when getting encodings for protocol properties. 3416/// Property attributes are stored as a comma-delimited C string. The simple 3417/// attributes readonly and bycopy are encoded as single characters. The 3418/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3419/// encoded as single characters, followed by an identifier. Property types 3420/// are also encoded as a parametrized attribute. The characters used to encode 3421/// these attributes are defined by the following enumeration: 3422/// @code 3423/// enum PropertyAttributes { 3424/// kPropertyReadOnly = 'R', // property is read-only. 3425/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3426/// kPropertyByref = '&', // property is a reference to the value last assigned 3427/// kPropertyDynamic = 'D', // property is dynamic 3428/// kPropertyGetter = 'G', // followed by getter selector name 3429/// kPropertySetter = 'S', // followed by setter selector name 3430/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3431/// kPropertyType = 't' // followed by old-style type encoding. 3432/// kPropertyWeak = 'W' // 'weak' property 3433/// kPropertyStrong = 'P' // property GC'able 3434/// kPropertyNonAtomic = 'N' // property non-atomic 3435/// }; 3436/// @endcode 3437void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3438 const Decl *Container, 3439 std::string& S) { 3440 // Collect information from the property implementation decl(s). 3441 bool Dynamic = false; 3442 ObjCPropertyImplDecl *SynthesizePID = 0; 3443 3444 // FIXME: Duplicated code due to poor abstraction. 3445 if (Container) { 3446 if (const ObjCCategoryImplDecl *CID = 3447 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3448 for (ObjCCategoryImplDecl::propimpl_iterator 3449 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3450 i != e; ++i) { 3451 ObjCPropertyImplDecl *PID = *i; 3452 if (PID->getPropertyDecl() == PD) { 3453 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3454 Dynamic = true; 3455 } else { 3456 SynthesizePID = PID; 3457 } 3458 } 3459 } 3460 } else { 3461 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3462 for (ObjCCategoryImplDecl::propimpl_iterator 3463 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3464 i != e; ++i) { 3465 ObjCPropertyImplDecl *PID = *i; 3466 if (PID->getPropertyDecl() == PD) { 3467 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3468 Dynamic = true; 3469 } else { 3470 SynthesizePID = PID; 3471 } 3472 } 3473 } 3474 } 3475 } 3476 3477 // FIXME: This is not very efficient. 3478 S = "T"; 3479 3480 // Encode result type. 3481 // GCC has some special rules regarding encoding of properties which 3482 // closely resembles encoding of ivars. 3483 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3484 true /* outermost type */, 3485 true /* encoding for property */); 3486 3487 if (PD->isReadOnly()) { 3488 S += ",R"; 3489 } else { 3490 switch (PD->getSetterKind()) { 3491 case ObjCPropertyDecl::Assign: break; 3492 case ObjCPropertyDecl::Copy: S += ",C"; break; 3493 case ObjCPropertyDecl::Retain: S += ",&"; break; 3494 } 3495 } 3496 3497 // It really isn't clear at all what this means, since properties 3498 // are "dynamic by default". 3499 if (Dynamic) 3500 S += ",D"; 3501 3502 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3503 S += ",N"; 3504 3505 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3506 S += ",G"; 3507 S += PD->getGetterName().getAsString(); 3508 } 3509 3510 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3511 S += ",S"; 3512 S += PD->getSetterName().getAsString(); 3513 } 3514 3515 if (SynthesizePID) { 3516 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3517 S += ",V"; 3518 S += OID->getNameAsString(); 3519 } 3520 3521 // FIXME: OBJCGC: weak & strong 3522} 3523 3524/// getLegacyIntegralTypeEncoding - 3525/// Another legacy compatibility encoding: 32-bit longs are encoded as 3526/// 'l' or 'L' , but not always. For typedefs, we need to use 3527/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3528/// 3529void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3530 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3531 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3532 if (BT->getKind() == BuiltinType::ULong && 3533 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3534 PointeeTy = UnsignedIntTy; 3535 else 3536 if (BT->getKind() == BuiltinType::Long && 3537 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3538 PointeeTy = IntTy; 3539 } 3540 } 3541} 3542 3543void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3544 const FieldDecl *Field) { 3545 // We follow the behavior of gcc, expanding structures which are 3546 // directly pointed to, and expanding embedded structures. Note that 3547 // these rules are sufficient to prevent recursive encoding of the 3548 // same type. 3549 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3550 true /* outermost type */); 3551} 3552 3553static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 3554 switch (T->getAs<BuiltinType>()->getKind()) { 3555 default: assert(0 && "Unhandled builtin type kind"); 3556 case BuiltinType::Void: return 'v'; 3557 case BuiltinType::Bool: return 'B'; 3558 case BuiltinType::Char_U: 3559 case BuiltinType::UChar: return 'C'; 3560 case BuiltinType::UShort: return 'S'; 3561 case BuiltinType::UInt: return 'I'; 3562 case BuiltinType::ULong: 3563 return 3564 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3565 case BuiltinType::UInt128: return 'T'; 3566 case BuiltinType::ULongLong: return 'Q'; 3567 case BuiltinType::Char_S: 3568 case BuiltinType::SChar: return 'c'; 3569 case BuiltinType::Short: return 's'; 3570 case BuiltinType::WChar: 3571 case BuiltinType::Int: return 'i'; 3572 case BuiltinType::Long: 3573 return 3574 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'l' : 'q'; 3575 case BuiltinType::LongLong: return 'q'; 3576 case BuiltinType::Int128: return 't'; 3577 case BuiltinType::Float: return 'f'; 3578 case BuiltinType::Double: return 'd'; 3579 case BuiltinType::LongDouble: return 'd'; 3580 } 3581} 3582 3583static void EncodeBitField(const ASTContext *Context, std::string& S, 3584 QualType T, const FieldDecl *FD) { 3585 const Expr *E = FD->getBitWidth(); 3586 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3587 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3588 S += 'b'; 3589 // The NeXT runtime encodes bit fields as b followed by the number of bits. 3590 // The GNU runtime requires more information; bitfields are encoded as b, 3591 // then the offset (in bits) of the first element, then the type of the 3592 // bitfield, then the size in bits. For example, in this structure: 3593 // 3594 // struct 3595 // { 3596 // int integer; 3597 // int flags:2; 3598 // }; 3599 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 3600 // runtime, but b32i2 for the GNU runtime. The reason for this extra 3601 // information is not especially sensible, but we're stuck with it for 3602 // compatibility with GCC, although providing it breaks anything that 3603 // actually uses runtime introspection and wants to work on both runtimes... 3604 if (!Ctx->getLangOptions().NeXTRuntime) { 3605 const RecordDecl *RD = FD->getParent(); 3606 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 3607 // FIXME: This same linear search is also used in ExprConstant - it might 3608 // be better if the FieldDecl stored its offset. We'd be increasing the 3609 // size of the object slightly, but saving some time every time it is used. 3610 unsigned i = 0; 3611 for (RecordDecl::field_iterator Field = RD->field_begin(), 3612 FieldEnd = RD->field_end(); 3613 Field != FieldEnd; (void)++Field, ++i) { 3614 if (*Field == FD) 3615 break; 3616 } 3617 S += llvm::utostr(RL.getFieldOffset(i)); 3618 S += ObjCEncodingForPrimitiveKind(Context, T); 3619 } 3620 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3621 S += llvm::utostr(N); 3622} 3623 3624// FIXME: Use SmallString for accumulating string. 3625void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3626 bool ExpandPointedToStructures, 3627 bool ExpandStructures, 3628 const FieldDecl *FD, 3629 bool OutermostType, 3630 bool EncodingProperty) { 3631 if (T->getAs<BuiltinType>()) { 3632 if (FD && FD->isBitField()) 3633 return EncodeBitField(this, S, T, FD); 3634 S += ObjCEncodingForPrimitiveKind(this, T); 3635 return; 3636 } 3637 3638 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3639 S += 'j'; 3640 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3641 false); 3642 return; 3643 } 3644 3645 // encoding for pointer or r3eference types. 3646 QualType PointeeTy; 3647 if (const PointerType *PT = T->getAs<PointerType>()) { 3648 if (PT->isObjCSelType()) { 3649 S += ':'; 3650 return; 3651 } 3652 PointeeTy = PT->getPointeeType(); 3653 } 3654 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3655 PointeeTy = RT->getPointeeType(); 3656 if (!PointeeTy.isNull()) { 3657 bool isReadOnly = false; 3658 // For historical/compatibility reasons, the read-only qualifier of the 3659 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3660 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3661 // Also, do not emit the 'r' for anything but the outermost type! 3662 if (isa<TypedefType>(T.getTypePtr())) { 3663 if (OutermostType && T.isConstQualified()) { 3664 isReadOnly = true; 3665 S += 'r'; 3666 } 3667 } else if (OutermostType) { 3668 QualType P = PointeeTy; 3669 while (P->getAs<PointerType>()) 3670 P = P->getAs<PointerType>()->getPointeeType(); 3671 if (P.isConstQualified()) { 3672 isReadOnly = true; 3673 S += 'r'; 3674 } 3675 } 3676 if (isReadOnly) { 3677 // Another legacy compatibility encoding. Some ObjC qualifier and type 3678 // combinations need to be rearranged. 3679 // Rewrite "in const" from "nr" to "rn" 3680 if (llvm::StringRef(S).endswith("nr")) 3681 S.replace(S.end()-2, S.end(), "rn"); 3682 } 3683 3684 if (PointeeTy->isCharType()) { 3685 // char pointer types should be encoded as '*' unless it is a 3686 // type that has been typedef'd to 'BOOL'. 3687 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3688 S += '*'; 3689 return; 3690 } 3691 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3692 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3693 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3694 S += '#'; 3695 return; 3696 } 3697 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3698 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3699 S += '@'; 3700 return; 3701 } 3702 // fall through... 3703 } 3704 S += '^'; 3705 getLegacyIntegralTypeEncoding(PointeeTy); 3706 3707 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3708 NULL); 3709 return; 3710 } 3711 3712 if (const ArrayType *AT = 3713 // Ignore type qualifiers etc. 3714 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3715 if (isa<IncompleteArrayType>(AT)) { 3716 // Incomplete arrays are encoded as a pointer to the array element. 3717 S += '^'; 3718 3719 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3720 false, ExpandStructures, FD); 3721 } else { 3722 S += '['; 3723 3724 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3725 S += llvm::utostr(CAT->getSize().getZExtValue()); 3726 else { 3727 //Variable length arrays are encoded as a regular array with 0 elements. 3728 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3729 S += '0'; 3730 } 3731 3732 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3733 false, ExpandStructures, FD); 3734 S += ']'; 3735 } 3736 return; 3737 } 3738 3739 if (T->getAs<FunctionType>()) { 3740 S += '?'; 3741 return; 3742 } 3743 3744 if (const RecordType *RTy = T->getAs<RecordType>()) { 3745 RecordDecl *RDecl = RTy->getDecl(); 3746 S += RDecl->isUnion() ? '(' : '{'; 3747 // Anonymous structures print as '?' 3748 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3749 S += II->getName(); 3750 if (ClassTemplateSpecializationDecl *Spec 3751 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 3752 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 3753 std::string TemplateArgsStr 3754 = TemplateSpecializationType::PrintTemplateArgumentList( 3755 TemplateArgs.getFlatArgumentList(), 3756 TemplateArgs.flat_size(), 3757 (*this).PrintingPolicy); 3758 3759 S += TemplateArgsStr; 3760 } 3761 } else { 3762 S += '?'; 3763 } 3764 if (ExpandStructures) { 3765 S += '='; 3766 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3767 FieldEnd = RDecl->field_end(); 3768 Field != FieldEnd; ++Field) { 3769 if (FD) { 3770 S += '"'; 3771 S += Field->getNameAsString(); 3772 S += '"'; 3773 } 3774 3775 // Special case bit-fields. 3776 if (Field->isBitField()) { 3777 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3778 (*Field)); 3779 } else { 3780 QualType qt = Field->getType(); 3781 getLegacyIntegralTypeEncoding(qt); 3782 getObjCEncodingForTypeImpl(qt, S, false, true, 3783 FD); 3784 } 3785 } 3786 } 3787 S += RDecl->isUnion() ? ')' : '}'; 3788 return; 3789 } 3790 3791 if (T->isEnumeralType()) { 3792 if (FD && FD->isBitField()) 3793 EncodeBitField(this, S, T, FD); 3794 else 3795 S += 'i'; 3796 return; 3797 } 3798 3799 if (T->isBlockPointerType()) { 3800 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3801 return; 3802 } 3803 3804 // Ignore protocol qualifiers when mangling at this level. 3805 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 3806 T = OT->getBaseType(); 3807 3808 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3809 // @encode(class_name) 3810 ObjCInterfaceDecl *OI = OIT->getDecl(); 3811 S += '{'; 3812 const IdentifierInfo *II = OI->getIdentifier(); 3813 S += II->getName(); 3814 S += '='; 3815 llvm::SmallVector<FieldDecl*, 32> RecFields; 3816 CollectObjCIvars(OI, RecFields); 3817 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 3818 if (RecFields[i]->isBitField()) 3819 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3820 RecFields[i]); 3821 else 3822 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3823 FD); 3824 } 3825 S += '}'; 3826 return; 3827 } 3828 3829 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 3830 if (OPT->isObjCIdType()) { 3831 S += '@'; 3832 return; 3833 } 3834 3835 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 3836 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 3837 // Since this is a binary compatibility issue, need to consult with runtime 3838 // folks. Fortunately, this is a *very* obsure construct. 3839 S += '#'; 3840 return; 3841 } 3842 3843 if (OPT->isObjCQualifiedIdType()) { 3844 getObjCEncodingForTypeImpl(getObjCIdType(), S, 3845 ExpandPointedToStructures, 3846 ExpandStructures, FD); 3847 if (FD || EncodingProperty) { 3848 // Note that we do extended encoding of protocol qualifer list 3849 // Only when doing ivar or property encoding. 3850 S += '"'; 3851 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3852 E = OPT->qual_end(); I != E; ++I) { 3853 S += '<'; 3854 S += (*I)->getNameAsString(); 3855 S += '>'; 3856 } 3857 S += '"'; 3858 } 3859 return; 3860 } 3861 3862 QualType PointeeTy = OPT->getPointeeType(); 3863 if (!EncodingProperty && 3864 isa<TypedefType>(PointeeTy.getTypePtr())) { 3865 // Another historical/compatibility reason. 3866 // We encode the underlying type which comes out as 3867 // {...}; 3868 S += '^'; 3869 getObjCEncodingForTypeImpl(PointeeTy, S, 3870 false, ExpandPointedToStructures, 3871 NULL); 3872 return; 3873 } 3874 3875 S += '@'; 3876 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 3877 S += '"'; 3878 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 3879 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3880 E = OPT->qual_end(); I != E; ++I) { 3881 S += '<'; 3882 S += (*I)->getNameAsString(); 3883 S += '>'; 3884 } 3885 S += '"'; 3886 } 3887 return; 3888 } 3889 3890 // gcc just blithely ignores member pointers. 3891 // TODO: maybe there should be a mangling for these 3892 if (T->getAs<MemberPointerType>()) 3893 return; 3894 3895 assert(0 && "@encode for type not implemented!"); 3896} 3897 3898void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 3899 std::string& S) const { 3900 if (QT & Decl::OBJC_TQ_In) 3901 S += 'n'; 3902 if (QT & Decl::OBJC_TQ_Inout) 3903 S += 'N'; 3904 if (QT & Decl::OBJC_TQ_Out) 3905 S += 'o'; 3906 if (QT & Decl::OBJC_TQ_Bycopy) 3907 S += 'O'; 3908 if (QT & Decl::OBJC_TQ_Byref) 3909 S += 'R'; 3910 if (QT & Decl::OBJC_TQ_Oneway) 3911 S += 'V'; 3912} 3913 3914void ASTContext::setBuiltinVaListType(QualType T) { 3915 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 3916 3917 BuiltinVaListType = T; 3918} 3919 3920void ASTContext::setObjCIdType(QualType T) { 3921 ObjCIdTypedefType = T; 3922} 3923 3924void ASTContext::setObjCSelType(QualType T) { 3925 ObjCSelTypedefType = T; 3926} 3927 3928void ASTContext::setObjCProtoType(QualType QT) { 3929 ObjCProtoType = QT; 3930} 3931 3932void ASTContext::setObjCClassType(QualType T) { 3933 ObjCClassTypedefType = T; 3934} 3935 3936void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 3937 assert(ObjCConstantStringType.isNull() && 3938 "'NSConstantString' type already set!"); 3939 3940 ObjCConstantStringType = getObjCInterfaceType(Decl); 3941} 3942 3943/// \brief Retrieve the template name that corresponds to a non-empty 3944/// lookup. 3945TemplateName ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 3946 UnresolvedSetIterator End) { 3947 unsigned size = End - Begin; 3948 assert(size > 1 && "set is not overloaded!"); 3949 3950 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 3951 size * sizeof(FunctionTemplateDecl*)); 3952 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 3953 3954 NamedDecl **Storage = OT->getStorage(); 3955 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 3956 NamedDecl *D = *I; 3957 assert(isa<FunctionTemplateDecl>(D) || 3958 (isa<UsingShadowDecl>(D) && 3959 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 3960 *Storage++ = D; 3961 } 3962 3963 return TemplateName(OT); 3964} 3965 3966/// \brief Retrieve the template name that represents a qualified 3967/// template name such as \c std::vector. 3968TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 3969 bool TemplateKeyword, 3970 TemplateDecl *Template) { 3971 // FIXME: Canonicalization? 3972 llvm::FoldingSetNodeID ID; 3973 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 3974 3975 void *InsertPos = 0; 3976 QualifiedTemplateName *QTN = 3977 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3978 if (!QTN) { 3979 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 3980 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 3981 } 3982 3983 return TemplateName(QTN); 3984} 3985 3986/// \brief Retrieve the template name that represents a dependent 3987/// template name such as \c MetaFun::template apply. 3988TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3989 const IdentifierInfo *Name) { 3990 assert((!NNS || NNS->isDependent()) && 3991 "Nested name specifier must be dependent"); 3992 3993 llvm::FoldingSetNodeID ID; 3994 DependentTemplateName::Profile(ID, NNS, Name); 3995 3996 void *InsertPos = 0; 3997 DependentTemplateName *QTN = 3998 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3999 4000 if (QTN) 4001 return TemplateName(QTN); 4002 4003 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4004 if (CanonNNS == NNS) { 4005 QTN = new (*this,4) DependentTemplateName(NNS, Name); 4006 } else { 4007 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 4008 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 4009 DependentTemplateName *CheckQTN = 4010 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4011 assert(!CheckQTN && "Dependent type name canonicalization broken"); 4012 (void)CheckQTN; 4013 } 4014 4015 DependentTemplateNames.InsertNode(QTN, InsertPos); 4016 return TemplateName(QTN); 4017} 4018 4019/// \brief Retrieve the template name that represents a dependent 4020/// template name such as \c MetaFun::template operator+. 4021TemplateName 4022ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4023 OverloadedOperatorKind Operator) { 4024 assert((!NNS || NNS->isDependent()) && 4025 "Nested name specifier must be dependent"); 4026 4027 llvm::FoldingSetNodeID ID; 4028 DependentTemplateName::Profile(ID, NNS, Operator); 4029 4030 void *InsertPos = 0; 4031 DependentTemplateName *QTN 4032 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4033 4034 if (QTN) 4035 return TemplateName(QTN); 4036 4037 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4038 if (CanonNNS == NNS) { 4039 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 4040 } else { 4041 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 4042 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 4043 4044 DependentTemplateName *CheckQTN 4045 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4046 assert(!CheckQTN && "Dependent template name canonicalization broken"); 4047 (void)CheckQTN; 4048 } 4049 4050 DependentTemplateNames.InsertNode(QTN, InsertPos); 4051 return TemplateName(QTN); 4052} 4053 4054/// getFromTargetType - Given one of the integer types provided by 4055/// TargetInfo, produce the corresponding type. The unsigned @p Type 4056/// is actually a value of type @c TargetInfo::IntType. 4057CanQualType ASTContext::getFromTargetType(unsigned Type) const { 4058 switch (Type) { 4059 case TargetInfo::NoInt: return CanQualType(); 4060 case TargetInfo::SignedShort: return ShortTy; 4061 case TargetInfo::UnsignedShort: return UnsignedShortTy; 4062 case TargetInfo::SignedInt: return IntTy; 4063 case TargetInfo::UnsignedInt: return UnsignedIntTy; 4064 case TargetInfo::SignedLong: return LongTy; 4065 case TargetInfo::UnsignedLong: return UnsignedLongTy; 4066 case TargetInfo::SignedLongLong: return LongLongTy; 4067 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 4068 } 4069 4070 assert(false && "Unhandled TargetInfo::IntType value"); 4071 return CanQualType(); 4072} 4073 4074//===----------------------------------------------------------------------===// 4075// Type Predicates. 4076//===----------------------------------------------------------------------===// 4077 4078/// isObjCNSObjectType - Return true if this is an NSObject object using 4079/// NSObject attribute on a c-style pointer type. 4080/// FIXME - Make it work directly on types. 4081/// FIXME: Move to Type. 4082/// 4083bool ASTContext::isObjCNSObjectType(QualType Ty) const { 4084 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 4085 if (TypedefDecl *TD = TDT->getDecl()) 4086 if (TD->getAttr<ObjCNSObjectAttr>()) 4087 return true; 4088 } 4089 return false; 4090} 4091 4092/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 4093/// garbage collection attribute. 4094/// 4095Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 4096 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 4097 if (getLangOptions().ObjC1 && 4098 getLangOptions().getGCMode() != LangOptions::NonGC) { 4099 GCAttrs = Ty.getObjCGCAttr(); 4100 // Default behavious under objective-c's gc is for objective-c pointers 4101 // (or pointers to them) be treated as though they were declared 4102 // as __strong. 4103 if (GCAttrs == Qualifiers::GCNone) { 4104 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 4105 GCAttrs = Qualifiers::Strong; 4106 else if (Ty->isPointerType()) 4107 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 4108 } 4109 // Non-pointers have none gc'able attribute regardless of the attribute 4110 // set on them. 4111 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 4112 return Qualifiers::GCNone; 4113 } 4114 return GCAttrs; 4115} 4116 4117//===----------------------------------------------------------------------===// 4118// Type Compatibility Testing 4119//===----------------------------------------------------------------------===// 4120 4121/// areCompatVectorTypes - Return true if the two specified vector types are 4122/// compatible. 4123static bool areCompatVectorTypes(const VectorType *LHS, 4124 const VectorType *RHS) { 4125 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 4126 return LHS->getElementType() == RHS->getElementType() && 4127 LHS->getNumElements() == RHS->getNumElements(); 4128} 4129 4130//===----------------------------------------------------------------------===// 4131// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 4132//===----------------------------------------------------------------------===// 4133 4134/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 4135/// inheritance hierarchy of 'rProto'. 4136bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 4137 ObjCProtocolDecl *rProto) { 4138 if (lProto == rProto) 4139 return true; 4140 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 4141 E = rProto->protocol_end(); PI != E; ++PI) 4142 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 4143 return true; 4144 return false; 4145} 4146 4147/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 4148/// return true if lhs's protocols conform to rhs's protocol; false 4149/// otherwise. 4150bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 4151 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 4152 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 4153 return false; 4154} 4155 4156/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 4157/// ObjCQualifiedIDType. 4158bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4159 bool compare) { 4160 // Allow id<P..> and an 'id' or void* type in all cases. 4161 if (lhs->isVoidPointerType() || 4162 lhs->isObjCIdType() || lhs->isObjCClassType()) 4163 return true; 4164 else if (rhs->isVoidPointerType() || 4165 rhs->isObjCIdType() || rhs->isObjCClassType()) 4166 return true; 4167 4168 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4169 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4170 4171 if (!rhsOPT) return false; 4172 4173 if (rhsOPT->qual_empty()) { 4174 // If the RHS is a unqualified interface pointer "NSString*", 4175 // make sure we check the class hierarchy. 4176 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4177 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4178 E = lhsQID->qual_end(); I != E; ++I) { 4179 // when comparing an id<P> on lhs with a static type on rhs, 4180 // see if static class implements all of id's protocols, directly or 4181 // through its super class and categories. 4182 if (!rhsID->ClassImplementsProtocol(*I, true)) 4183 return false; 4184 } 4185 } 4186 // If there are no qualifiers and no interface, we have an 'id'. 4187 return true; 4188 } 4189 // Both the right and left sides have qualifiers. 4190 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4191 E = lhsQID->qual_end(); I != E; ++I) { 4192 ObjCProtocolDecl *lhsProto = *I; 4193 bool match = false; 4194 4195 // when comparing an id<P> on lhs with a static type on rhs, 4196 // see if static class implements all of id's protocols, directly or 4197 // through its super class and categories. 4198 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4199 E = rhsOPT->qual_end(); J != E; ++J) { 4200 ObjCProtocolDecl *rhsProto = *J; 4201 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4202 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4203 match = true; 4204 break; 4205 } 4206 } 4207 // If the RHS is a qualified interface pointer "NSString<P>*", 4208 // make sure we check the class hierarchy. 4209 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4210 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4211 E = lhsQID->qual_end(); I != E; ++I) { 4212 // when comparing an id<P> on lhs with a static type on rhs, 4213 // see if static class implements all of id's protocols, directly or 4214 // through its super class and categories. 4215 if (rhsID->ClassImplementsProtocol(*I, true)) { 4216 match = true; 4217 break; 4218 } 4219 } 4220 } 4221 if (!match) 4222 return false; 4223 } 4224 4225 return true; 4226 } 4227 4228 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4229 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4230 4231 if (const ObjCObjectPointerType *lhsOPT = 4232 lhs->getAsObjCInterfacePointerType()) { 4233 if (lhsOPT->qual_empty()) { 4234 bool match = false; 4235 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4236 for (ObjCObjectPointerType::qual_iterator I = rhsQID->qual_begin(), 4237 E = rhsQID->qual_end(); I != E; ++I) { 4238 // when comparing an id<P> on lhs with a static type on rhs, 4239 // see if static class implements all of id's protocols, directly or 4240 // through its super class and categories. 4241 if (lhsID->ClassImplementsProtocol(*I, true)) { 4242 match = true; 4243 break; 4244 } 4245 } 4246 if (!match) 4247 return false; 4248 } 4249 return true; 4250 } 4251 // Both the right and left sides have qualifiers. 4252 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4253 E = lhsOPT->qual_end(); I != E; ++I) { 4254 ObjCProtocolDecl *lhsProto = *I; 4255 bool match = false; 4256 4257 // when comparing an id<P> on lhs with a static type on rhs, 4258 // see if static class implements all of id's protocols, directly or 4259 // through its super class and categories. 4260 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4261 E = rhsQID->qual_end(); J != E; ++J) { 4262 ObjCProtocolDecl *rhsProto = *J; 4263 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4264 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4265 match = true; 4266 break; 4267 } 4268 } 4269 if (!match) 4270 return false; 4271 } 4272 return true; 4273 } 4274 return false; 4275} 4276 4277/// canAssignObjCInterfaces - Return true if the two interface types are 4278/// compatible for assignment from RHS to LHS. This handles validation of any 4279/// protocol qualifiers on the LHS or RHS. 4280/// 4281bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4282 const ObjCObjectPointerType *RHSOPT) { 4283 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4284 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4285 4286 // If either type represents the built-in 'id' or 'Class' types, return true. 4287 if (LHS->isObjCUnqualifiedIdOrClass() || 4288 RHS->isObjCUnqualifiedIdOrClass()) 4289 return true; 4290 4291 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 4292 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4293 QualType(RHSOPT,0), 4294 false); 4295 4296 // If we have 2 user-defined types, fall into that path. 4297 if (LHS->getInterface() && RHS->getInterface()) 4298 return canAssignObjCInterfaces(LHS, RHS); 4299 4300 return false; 4301} 4302 4303/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4304/// for providing type-safty for objective-c pointers used to pass/return 4305/// arguments in block literals. When passed as arguments, passing 'A*' where 4306/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4307/// not OK. For the return type, the opposite is not OK. 4308bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4309 const ObjCObjectPointerType *LHSOPT, 4310 const ObjCObjectPointerType *RHSOPT) { 4311 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4312 return true; 4313 4314 if (LHSOPT->isObjCBuiltinType()) { 4315 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4316 } 4317 4318 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4319 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4320 QualType(RHSOPT,0), 4321 false); 4322 4323 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4324 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4325 if (LHS && RHS) { // We have 2 user-defined types. 4326 if (LHS != RHS) { 4327 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4328 return false; 4329 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4330 return true; 4331 } 4332 else 4333 return true; 4334 } 4335 return false; 4336} 4337 4338/// getIntersectionOfProtocols - This routine finds the intersection of set 4339/// of protocols inherited from two distinct objective-c pointer objects. 4340/// It is used to build composite qualifier list of the composite type of 4341/// the conditional expression involving two objective-c pointer objects. 4342static 4343void getIntersectionOfProtocols(ASTContext &Context, 4344 const ObjCObjectPointerType *LHSOPT, 4345 const ObjCObjectPointerType *RHSOPT, 4346 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4347 4348 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4349 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4350 assert(LHS->getInterface() && "LHS must have an interface base"); 4351 assert(RHS->getInterface() && "RHS must have an interface base"); 4352 4353 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4354 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4355 if (LHSNumProtocols > 0) 4356 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4357 else { 4358 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4359 Context.CollectInheritedProtocols(LHS->getInterface(), 4360 LHSInheritedProtocols); 4361 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4362 LHSInheritedProtocols.end()); 4363 } 4364 4365 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4366 if (RHSNumProtocols > 0) { 4367 ObjCProtocolDecl **RHSProtocols = 4368 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4369 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4370 if (InheritedProtocolSet.count(RHSProtocols[i])) 4371 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4372 } 4373 else { 4374 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4375 Context.CollectInheritedProtocols(RHS->getInterface(), 4376 RHSInheritedProtocols); 4377 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4378 RHSInheritedProtocols.begin(), 4379 E = RHSInheritedProtocols.end(); I != E; ++I) 4380 if (InheritedProtocolSet.count((*I))) 4381 IntersectionOfProtocols.push_back((*I)); 4382 } 4383} 4384 4385/// areCommonBaseCompatible - Returns common base class of the two classes if 4386/// one found. Note that this is O'2 algorithm. But it will be called as the 4387/// last type comparison in a ?-exp of ObjC pointer types before a 4388/// warning is issued. So, its invokation is extremely rare. 4389QualType ASTContext::areCommonBaseCompatible( 4390 const ObjCObjectPointerType *Lptr, 4391 const ObjCObjectPointerType *Rptr) { 4392 const ObjCObjectType *LHS = Lptr->getObjectType(); 4393 const ObjCObjectType *RHS = Rptr->getObjectType(); 4394 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 4395 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 4396 if (!LDecl || !RDecl) 4397 return QualType(); 4398 4399 while ((LDecl = LDecl->getSuperClass())) { 4400 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 4401 if (canAssignObjCInterfaces(LHS, RHS)) { 4402 llvm::SmallVector<ObjCProtocolDecl *, 8> Protocols; 4403 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 4404 4405 QualType Result = QualType(LHS, 0); 4406 if (!Protocols.empty()) 4407 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 4408 Result = getObjCObjectPointerType(Result); 4409 return Result; 4410 } 4411 } 4412 4413 return QualType(); 4414} 4415 4416bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 4417 const ObjCObjectType *RHS) { 4418 assert(LHS->getInterface() && "LHS is not an interface type"); 4419 assert(RHS->getInterface() && "RHS is not an interface type"); 4420 4421 // Verify that the base decls are compatible: the RHS must be a subclass of 4422 // the LHS. 4423 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 4424 return false; 4425 4426 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4427 // protocol qualified at all, then we are good. 4428 if (LHS->getNumProtocols() == 0) 4429 return true; 4430 4431 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4432 // isn't a superset. 4433 if (RHS->getNumProtocols() == 0) 4434 return true; // FIXME: should return false! 4435 4436 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 4437 LHSPE = LHS->qual_end(); 4438 LHSPI != LHSPE; LHSPI++) { 4439 bool RHSImplementsProtocol = false; 4440 4441 // If the RHS doesn't implement the protocol on the left, the types 4442 // are incompatible. 4443 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 4444 RHSPE = RHS->qual_end(); 4445 RHSPI != RHSPE; RHSPI++) { 4446 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4447 RHSImplementsProtocol = true; 4448 break; 4449 } 4450 } 4451 // FIXME: For better diagnostics, consider passing back the protocol name. 4452 if (!RHSImplementsProtocol) 4453 return false; 4454 } 4455 // The RHS implements all protocols listed on the LHS. 4456 return true; 4457} 4458 4459bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4460 // get the "pointed to" types 4461 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4462 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4463 4464 if (!LHSOPT || !RHSOPT) 4465 return false; 4466 4467 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4468 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4469} 4470 4471/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4472/// both shall have the identically qualified version of a compatible type. 4473/// C99 6.2.7p1: Two types have compatible types if their types are the 4474/// same. See 6.7.[2,3,5] for additional rules. 4475bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 4476 if (getLangOptions().CPlusPlus) 4477 return hasSameType(LHS, RHS); 4478 4479 return !mergeTypes(LHS, RHS).isNull(); 4480} 4481 4482bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 4483 return !mergeTypes(LHS, RHS, true).isNull(); 4484} 4485 4486QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 4487 bool OfBlockPointer) { 4488 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4489 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4490 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4491 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4492 bool allLTypes = true; 4493 bool allRTypes = true; 4494 4495 // Check return type 4496 QualType retType; 4497 if (OfBlockPointer) 4498 retType = mergeTypes(rbase->getResultType(), lbase->getResultType(), true); 4499 else 4500 retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 4501 if (retType.isNull()) return QualType(); 4502 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 4503 allLTypes = false; 4504 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 4505 allRTypes = false; 4506 // FIXME: double check this 4507 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 4508 // rbase->getRegParmAttr() != 0 && 4509 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 4510 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 4511 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 4512 unsigned RegParm = lbaseInfo.getRegParm() == 0 ? rbaseInfo.getRegParm() : 4513 lbaseInfo.getRegParm(); 4514 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 4515 if (NoReturn != lbaseInfo.getNoReturn() || 4516 RegParm != lbaseInfo.getRegParm()) 4517 allLTypes = false; 4518 if (NoReturn != rbaseInfo.getNoReturn() || 4519 RegParm != rbaseInfo.getRegParm()) 4520 allRTypes = false; 4521 CallingConv lcc = lbaseInfo.getCC(); 4522 CallingConv rcc = rbaseInfo.getCC(); 4523 // Compatible functions must have compatible calling conventions 4524 if (!isSameCallConv(lcc, rcc)) 4525 return QualType(); 4526 4527 if (lproto && rproto) { // two C99 style function prototypes 4528 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4529 "C++ shouldn't be here"); 4530 unsigned lproto_nargs = lproto->getNumArgs(); 4531 unsigned rproto_nargs = rproto->getNumArgs(); 4532 4533 // Compatible functions must have the same number of arguments 4534 if (lproto_nargs != rproto_nargs) 4535 return QualType(); 4536 4537 // Variadic and non-variadic functions aren't compatible 4538 if (lproto->isVariadic() != rproto->isVariadic()) 4539 return QualType(); 4540 4541 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4542 return QualType(); 4543 4544 // Check argument compatibility 4545 llvm::SmallVector<QualType, 10> types; 4546 for (unsigned i = 0; i < lproto_nargs; i++) { 4547 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4548 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4549 QualType argtype = mergeTypes(largtype, rargtype, OfBlockPointer); 4550 if (argtype.isNull()) return QualType(); 4551 types.push_back(argtype); 4552 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4553 allLTypes = false; 4554 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4555 allRTypes = false; 4556 } 4557 if (allLTypes) return lhs; 4558 if (allRTypes) return rhs; 4559 return getFunctionType(retType, types.begin(), types.size(), 4560 lproto->isVariadic(), lproto->getTypeQuals(), 4561 false, false, 0, 0, 4562 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4563 } 4564 4565 if (lproto) allRTypes = false; 4566 if (rproto) allLTypes = false; 4567 4568 const FunctionProtoType *proto = lproto ? lproto : rproto; 4569 if (proto) { 4570 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4571 if (proto->isVariadic()) return QualType(); 4572 // Check that the types are compatible with the types that 4573 // would result from default argument promotions (C99 6.7.5.3p15). 4574 // The only types actually affected are promotable integer 4575 // types and floats, which would be passed as a different 4576 // type depending on whether the prototype is visible. 4577 unsigned proto_nargs = proto->getNumArgs(); 4578 for (unsigned i = 0; i < proto_nargs; ++i) { 4579 QualType argTy = proto->getArgType(i); 4580 4581 // Look at the promotion type of enum types, since that is the type used 4582 // to pass enum values. 4583 if (const EnumType *Enum = argTy->getAs<EnumType>()) 4584 argTy = Enum->getDecl()->getPromotionType(); 4585 4586 if (argTy->isPromotableIntegerType() || 4587 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4588 return QualType(); 4589 } 4590 4591 if (allLTypes) return lhs; 4592 if (allRTypes) return rhs; 4593 return getFunctionType(retType, proto->arg_type_begin(), 4594 proto->getNumArgs(), proto->isVariadic(), 4595 proto->getTypeQuals(), 4596 false, false, 0, 0, 4597 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4598 } 4599 4600 if (allLTypes) return lhs; 4601 if (allRTypes) return rhs; 4602 FunctionType::ExtInfo Info(NoReturn, RegParm, lcc); 4603 return getFunctionNoProtoType(retType, Info); 4604} 4605 4606QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 4607 bool OfBlockPointer) { 4608 // C++ [expr]: If an expression initially has the type "reference to T", the 4609 // type is adjusted to "T" prior to any further analysis, the expression 4610 // designates the object or function denoted by the reference, and the 4611 // expression is an lvalue unless the reference is an rvalue reference and 4612 // the expression is a function call (possibly inside parentheses). 4613 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 4614 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 4615 4616 QualType LHSCan = getCanonicalType(LHS), 4617 RHSCan = getCanonicalType(RHS); 4618 4619 // If two types are identical, they are compatible. 4620 if (LHSCan == RHSCan) 4621 return LHS; 4622 4623 // If the qualifiers are different, the types aren't compatible... mostly. 4624 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4625 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4626 if (LQuals != RQuals) { 4627 // If any of these qualifiers are different, we have a type 4628 // mismatch. 4629 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4630 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4631 return QualType(); 4632 4633 // Exactly one GC qualifier difference is allowed: __strong is 4634 // okay if the other type has no GC qualifier but is an Objective 4635 // C object pointer (i.e. implicitly strong by default). We fix 4636 // this by pretending that the unqualified type was actually 4637 // qualified __strong. 4638 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4639 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4640 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4641 4642 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4643 return QualType(); 4644 4645 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4646 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4647 } 4648 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4649 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4650 } 4651 return QualType(); 4652 } 4653 4654 // Okay, qualifiers are equal. 4655 4656 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4657 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4658 4659 // We want to consider the two function types to be the same for these 4660 // comparisons, just force one to the other. 4661 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 4662 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 4663 4664 // Same as above for arrays 4665 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 4666 LHSClass = Type::ConstantArray; 4667 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 4668 RHSClass = Type::ConstantArray; 4669 4670 // ObjCInterfaces are just specialized ObjCObjects. 4671 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 4672 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 4673 4674 // Canonicalize ExtVector -> Vector. 4675 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 4676 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 4677 4678 // If the canonical type classes don't match. 4679 if (LHSClass != RHSClass) { 4680 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 4681 // a signed integer type, or an unsigned integer type. 4682 // Compatibility is based on the underlying type, not the promotion 4683 // type. 4684 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 4685 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 4686 return RHS; 4687 } 4688 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 4689 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 4690 return LHS; 4691 } 4692 4693 return QualType(); 4694 } 4695 4696 // The canonical type classes match. 4697 switch (LHSClass) { 4698#define TYPE(Class, Base) 4699#define ABSTRACT_TYPE(Class, Base) 4700#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 4701#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4702#define DEPENDENT_TYPE(Class, Base) case Type::Class: 4703#include "clang/AST/TypeNodes.def" 4704 assert(false && "Non-canonical and dependent types shouldn't get here"); 4705 return QualType(); 4706 4707 case Type::LValueReference: 4708 case Type::RValueReference: 4709 case Type::MemberPointer: 4710 assert(false && "C++ should never be in mergeTypes"); 4711 return QualType(); 4712 4713 case Type::ObjCInterface: 4714 case Type::IncompleteArray: 4715 case Type::VariableArray: 4716 case Type::FunctionProto: 4717 case Type::ExtVector: 4718 assert(false && "Types are eliminated above"); 4719 return QualType(); 4720 4721 case Type::Pointer: 4722 { 4723 // Merge two pointer types, while trying to preserve typedef info 4724 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 4725 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 4726 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 4727 if (ResultType.isNull()) return QualType(); 4728 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4729 return LHS; 4730 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4731 return RHS; 4732 return getPointerType(ResultType); 4733 } 4734 case Type::BlockPointer: 4735 { 4736 // Merge two block pointer types, while trying to preserve typedef info 4737 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 4738 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 4739 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer); 4740 if (ResultType.isNull()) return QualType(); 4741 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4742 return LHS; 4743 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4744 return RHS; 4745 return getBlockPointerType(ResultType); 4746 } 4747 case Type::ConstantArray: 4748 { 4749 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 4750 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 4751 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 4752 return QualType(); 4753 4754 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 4755 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 4756 QualType ResultType = mergeTypes(LHSElem, RHSElem); 4757 if (ResultType.isNull()) return QualType(); 4758 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4759 return LHS; 4760 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4761 return RHS; 4762 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 4763 ArrayType::ArraySizeModifier(), 0); 4764 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 4765 ArrayType::ArraySizeModifier(), 0); 4766 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 4767 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 4768 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4769 return LHS; 4770 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4771 return RHS; 4772 if (LVAT) { 4773 // FIXME: This isn't correct! But tricky to implement because 4774 // the array's size has to be the size of LHS, but the type 4775 // has to be different. 4776 return LHS; 4777 } 4778 if (RVAT) { 4779 // FIXME: This isn't correct! But tricky to implement because 4780 // the array's size has to be the size of RHS, but the type 4781 // has to be different. 4782 return RHS; 4783 } 4784 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 4785 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 4786 return getIncompleteArrayType(ResultType, 4787 ArrayType::ArraySizeModifier(), 0); 4788 } 4789 case Type::FunctionNoProto: 4790 return mergeFunctionTypes(LHS, RHS, OfBlockPointer); 4791 case Type::Record: 4792 case Type::Enum: 4793 return QualType(); 4794 case Type::Builtin: 4795 // Only exactly equal builtin types are compatible, which is tested above. 4796 return QualType(); 4797 case Type::Complex: 4798 // Distinct complex types are incompatible. 4799 return QualType(); 4800 case Type::Vector: 4801 // FIXME: The merged type should be an ExtVector! 4802 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 4803 RHSCan->getAs<VectorType>())) 4804 return LHS; 4805 return QualType(); 4806 case Type::ObjCObject: { 4807 // Check if the types are assignment compatible. 4808 // FIXME: This should be type compatibility, e.g. whether 4809 // "LHS x; RHS x;" at global scope is legal. 4810 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 4811 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 4812 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 4813 return LHS; 4814 4815 return QualType(); 4816 } 4817 case Type::ObjCObjectPointer: { 4818 if (OfBlockPointer) { 4819 if (canAssignObjCInterfacesInBlockPointer( 4820 LHS->getAs<ObjCObjectPointerType>(), 4821 RHS->getAs<ObjCObjectPointerType>())) 4822 return LHS; 4823 return QualType(); 4824 } 4825 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 4826 RHS->getAs<ObjCObjectPointerType>())) 4827 return LHS; 4828 4829 return QualType(); 4830 } 4831 } 4832 4833 return QualType(); 4834} 4835 4836/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 4837/// 'RHS' attributes and returns the merged version; including for function 4838/// return types. 4839QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 4840 QualType LHSCan = getCanonicalType(LHS), 4841 RHSCan = getCanonicalType(RHS); 4842 // If two types are identical, they are compatible. 4843 if (LHSCan == RHSCan) 4844 return LHS; 4845 if (RHSCan->isFunctionType()) { 4846 if (!LHSCan->isFunctionType()) 4847 return QualType(); 4848 QualType OldReturnType = 4849 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 4850 QualType NewReturnType = 4851 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 4852 QualType ResReturnType = 4853 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 4854 if (ResReturnType.isNull()) 4855 return QualType(); 4856 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 4857 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 4858 // In either case, use OldReturnType to build the new function type. 4859 const FunctionType *F = LHS->getAs<FunctionType>(); 4860 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 4861 FunctionType::ExtInfo Info = getFunctionExtInfo(LHS); 4862 QualType ResultType 4863 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 4864 FPT->getNumArgs(), FPT->isVariadic(), 4865 FPT->getTypeQuals(), 4866 FPT->hasExceptionSpec(), 4867 FPT->hasAnyExceptionSpec(), 4868 FPT->getNumExceptions(), 4869 FPT->exception_begin(), 4870 Info); 4871 return ResultType; 4872 } 4873 } 4874 return QualType(); 4875 } 4876 4877 // If the qualifiers are different, the types can still be merged. 4878 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4879 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4880 if (LQuals != RQuals) { 4881 // If any of these qualifiers are different, we have a type mismatch. 4882 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4883 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4884 return QualType(); 4885 4886 // Exactly one GC qualifier difference is allowed: __strong is 4887 // okay if the other type has no GC qualifier but is an Objective 4888 // C object pointer (i.e. implicitly strong by default). We fix 4889 // this by pretending that the unqualified type was actually 4890 // qualified __strong. 4891 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4892 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4893 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4894 4895 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4896 return QualType(); 4897 4898 if (GC_L == Qualifiers::Strong) 4899 return LHS; 4900 if (GC_R == Qualifiers::Strong) 4901 return RHS; 4902 return QualType(); 4903 } 4904 4905 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 4906 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 4907 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 4908 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 4909 if (ResQT == LHSBaseQT) 4910 return LHS; 4911 if (ResQT == RHSBaseQT) 4912 return RHS; 4913 } 4914 return QualType(); 4915} 4916 4917//===----------------------------------------------------------------------===// 4918// Integer Predicates 4919//===----------------------------------------------------------------------===// 4920 4921unsigned ASTContext::getIntWidth(QualType T) { 4922 if (T->isBooleanType()) 4923 return 1; 4924 if (EnumType *ET = dyn_cast<EnumType>(T)) 4925 T = ET->getDecl()->getIntegerType(); 4926 // For builtin types, just use the standard type sizing method 4927 return (unsigned)getTypeSize(T); 4928} 4929 4930QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 4931 assert(T->isSignedIntegerType() && "Unexpected type"); 4932 4933 // Turn <4 x signed int> -> <4 x unsigned int> 4934 if (const VectorType *VTy = T->getAs<VectorType>()) 4935 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 4936 VTy->getNumElements(), VTy->isAltiVec(), VTy->isPixel()); 4937 4938 // For enums, we return the unsigned version of the base type. 4939 if (const EnumType *ETy = T->getAs<EnumType>()) 4940 T = ETy->getDecl()->getIntegerType(); 4941 4942 const BuiltinType *BTy = T->getAs<BuiltinType>(); 4943 assert(BTy && "Unexpected signed integer type"); 4944 switch (BTy->getKind()) { 4945 case BuiltinType::Char_S: 4946 case BuiltinType::SChar: 4947 return UnsignedCharTy; 4948 case BuiltinType::Short: 4949 return UnsignedShortTy; 4950 case BuiltinType::Int: 4951 return UnsignedIntTy; 4952 case BuiltinType::Long: 4953 return UnsignedLongTy; 4954 case BuiltinType::LongLong: 4955 return UnsignedLongLongTy; 4956 case BuiltinType::Int128: 4957 return UnsignedInt128Ty; 4958 default: 4959 assert(0 && "Unexpected signed integer type"); 4960 return QualType(); 4961 } 4962} 4963 4964ExternalASTSource::~ExternalASTSource() { } 4965 4966void ExternalASTSource::PrintStats() { } 4967 4968 4969//===----------------------------------------------------------------------===// 4970// Builtin Type Computation 4971//===----------------------------------------------------------------------===// 4972 4973/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 4974/// pointer over the consumed characters. This returns the resultant type. 4975static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 4976 ASTContext::GetBuiltinTypeError &Error, 4977 bool AllowTypeModifiers = true) { 4978 // Modifiers. 4979 int HowLong = 0; 4980 bool Signed = false, Unsigned = false; 4981 4982 // Read the modifiers first. 4983 bool Done = false; 4984 while (!Done) { 4985 switch (*Str++) { 4986 default: Done = true; --Str; break; 4987 case 'S': 4988 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 4989 assert(!Signed && "Can't use 'S' modifier multiple times!"); 4990 Signed = true; 4991 break; 4992 case 'U': 4993 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 4994 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 4995 Unsigned = true; 4996 break; 4997 case 'L': 4998 assert(HowLong <= 2 && "Can't have LLLL modifier"); 4999 ++HowLong; 5000 break; 5001 } 5002 } 5003 5004 QualType Type; 5005 5006 // Read the base type. 5007 switch (*Str++) { 5008 default: assert(0 && "Unknown builtin type letter!"); 5009 case 'v': 5010 assert(HowLong == 0 && !Signed && !Unsigned && 5011 "Bad modifiers used with 'v'!"); 5012 Type = Context.VoidTy; 5013 break; 5014 case 'f': 5015 assert(HowLong == 0 && !Signed && !Unsigned && 5016 "Bad modifiers used with 'f'!"); 5017 Type = Context.FloatTy; 5018 break; 5019 case 'd': 5020 assert(HowLong < 2 && !Signed && !Unsigned && 5021 "Bad modifiers used with 'd'!"); 5022 if (HowLong) 5023 Type = Context.LongDoubleTy; 5024 else 5025 Type = Context.DoubleTy; 5026 break; 5027 case 's': 5028 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 5029 if (Unsigned) 5030 Type = Context.UnsignedShortTy; 5031 else 5032 Type = Context.ShortTy; 5033 break; 5034 case 'i': 5035 if (HowLong == 3) 5036 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 5037 else if (HowLong == 2) 5038 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 5039 else if (HowLong == 1) 5040 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 5041 else 5042 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 5043 break; 5044 case 'c': 5045 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 5046 if (Signed) 5047 Type = Context.SignedCharTy; 5048 else if (Unsigned) 5049 Type = Context.UnsignedCharTy; 5050 else 5051 Type = Context.CharTy; 5052 break; 5053 case 'b': // boolean 5054 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 5055 Type = Context.BoolTy; 5056 break; 5057 case 'z': // size_t. 5058 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 5059 Type = Context.getSizeType(); 5060 break; 5061 case 'F': 5062 Type = Context.getCFConstantStringType(); 5063 break; 5064 case 'a': 5065 Type = Context.getBuiltinVaListType(); 5066 assert(!Type.isNull() && "builtin va list type not initialized!"); 5067 break; 5068 case 'A': 5069 // This is a "reference" to a va_list; however, what exactly 5070 // this means depends on how va_list is defined. There are two 5071 // different kinds of va_list: ones passed by value, and ones 5072 // passed by reference. An example of a by-value va_list is 5073 // x86, where va_list is a char*. An example of by-ref va_list 5074 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 5075 // we want this argument to be a char*&; for x86-64, we want 5076 // it to be a __va_list_tag*. 5077 Type = Context.getBuiltinVaListType(); 5078 assert(!Type.isNull() && "builtin va list type not initialized!"); 5079 if (Type->isArrayType()) { 5080 Type = Context.getArrayDecayedType(Type); 5081 } else { 5082 Type = Context.getLValueReferenceType(Type); 5083 } 5084 break; 5085 case 'V': { 5086 char *End; 5087 unsigned NumElements = strtoul(Str, &End, 10); 5088 assert(End != Str && "Missing vector size"); 5089 5090 Str = End; 5091 5092 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 5093 // FIXME: Don't know what to do about AltiVec. 5094 Type = Context.getVectorType(ElementType, NumElements, false, false); 5095 break; 5096 } 5097 case 'X': { 5098 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 5099 Type = Context.getComplexType(ElementType); 5100 break; 5101 } 5102 case 'P': 5103 Type = Context.getFILEType(); 5104 if (Type.isNull()) { 5105 Error = ASTContext::GE_Missing_stdio; 5106 return QualType(); 5107 } 5108 break; 5109 case 'J': 5110 if (Signed) 5111 Type = Context.getsigjmp_bufType(); 5112 else 5113 Type = Context.getjmp_bufType(); 5114 5115 if (Type.isNull()) { 5116 Error = ASTContext::GE_Missing_setjmp; 5117 return QualType(); 5118 } 5119 break; 5120 } 5121 5122 if (!AllowTypeModifiers) 5123 return Type; 5124 5125 Done = false; 5126 while (!Done) { 5127 switch (char c = *Str++) { 5128 default: Done = true; --Str; break; 5129 case '*': 5130 case '&': 5131 { 5132 // Both pointers and references can have their pointee types 5133 // qualified with an address space. 5134 char *End; 5135 unsigned AddrSpace = strtoul(Str, &End, 10); 5136 if (End != Str && AddrSpace != 0) { 5137 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 5138 Str = End; 5139 } 5140 } 5141 if (c == '*') 5142 Type = Context.getPointerType(Type); 5143 else 5144 Type = Context.getLValueReferenceType(Type); 5145 break; 5146 // FIXME: There's no way to have a built-in with an rvalue ref arg. 5147 case 'C': 5148 Type = Type.withConst(); 5149 break; 5150 case 'D': 5151 Type = Context.getVolatileType(Type); 5152 break; 5153 } 5154 } 5155 5156 return Type; 5157} 5158 5159/// GetBuiltinType - Return the type for the specified builtin. 5160QualType ASTContext::GetBuiltinType(unsigned id, 5161 GetBuiltinTypeError &Error) { 5162 const char *TypeStr = BuiltinInfo.GetTypeString(id); 5163 5164 llvm::SmallVector<QualType, 8> ArgTypes; 5165 5166 Error = GE_None; 5167 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 5168 if (Error != GE_None) 5169 return QualType(); 5170 while (TypeStr[0] && TypeStr[0] != '.') { 5171 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 5172 if (Error != GE_None) 5173 return QualType(); 5174 5175 // Do array -> pointer decay. The builtin should use the decayed type. 5176 if (Ty->isArrayType()) 5177 Ty = getArrayDecayedType(Ty); 5178 5179 ArgTypes.push_back(Ty); 5180 } 5181 5182 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 5183 "'.' should only occur at end of builtin type list!"); 5184 5185 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 5186 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 5187 return getFunctionNoProtoType(ResType); 5188 5189 // FIXME: Should we create noreturn types? 5190 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 5191 TypeStr[0] == '.', 0, false, false, 0, 0, 5192 FunctionType::ExtInfo()); 5193} 5194 5195QualType 5196ASTContext::UsualArithmeticConversionsType(QualType lhs, QualType rhs) { 5197 // Perform the usual unary conversions. We do this early so that 5198 // integral promotions to "int" can allow us to exit early, in the 5199 // lhs == rhs check. Also, for conversion purposes, we ignore any 5200 // qualifiers. For example, "const float" and "float" are 5201 // equivalent. 5202 if (lhs->isPromotableIntegerType()) 5203 lhs = getPromotedIntegerType(lhs); 5204 else 5205 lhs = lhs.getUnqualifiedType(); 5206 if (rhs->isPromotableIntegerType()) 5207 rhs = getPromotedIntegerType(rhs); 5208 else 5209 rhs = rhs.getUnqualifiedType(); 5210 5211 // If both types are identical, no conversion is needed. 5212 if (lhs == rhs) 5213 return lhs; 5214 5215 // If either side is a non-arithmetic type (e.g. a pointer), we are done. 5216 // The caller can deal with this (e.g. pointer + int). 5217 if (!lhs->isArithmeticType() || !rhs->isArithmeticType()) 5218 return lhs; 5219 5220 // At this point, we have two different arithmetic types. 5221 5222 // Handle complex types first (C99 6.3.1.8p1). 5223 if (lhs->isComplexType() || rhs->isComplexType()) { 5224 // if we have an integer operand, the result is the complex type. 5225 if (rhs->isIntegerType() || rhs->isComplexIntegerType()) { 5226 // convert the rhs to the lhs complex type. 5227 return lhs; 5228 } 5229 if (lhs->isIntegerType() || lhs->isComplexIntegerType()) { 5230 // convert the lhs to the rhs complex type. 5231 return rhs; 5232 } 5233 // This handles complex/complex, complex/float, or float/complex. 5234 // When both operands are complex, the shorter operand is converted to the 5235 // type of the longer, and that is the type of the result. This corresponds 5236 // to what is done when combining two real floating-point operands. 5237 // The fun begins when size promotion occur across type domains. 5238 // From H&S 6.3.4: When one operand is complex and the other is a real 5239 // floating-point type, the less precise type is converted, within it's 5240 // real or complex domain, to the precision of the other type. For example, 5241 // when combining a "long double" with a "double _Complex", the 5242 // "double _Complex" is promoted to "long double _Complex". 5243 int result = getFloatingTypeOrder(lhs, rhs); 5244 5245 if (result > 0) { // The left side is bigger, convert rhs. 5246 rhs = getFloatingTypeOfSizeWithinDomain(lhs, rhs); 5247 } else if (result < 0) { // The right side is bigger, convert lhs. 5248 lhs = getFloatingTypeOfSizeWithinDomain(rhs, lhs); 5249 } 5250 // At this point, lhs and rhs have the same rank/size. Now, make sure the 5251 // domains match. This is a requirement for our implementation, C99 5252 // does not require this promotion. 5253 if (lhs != rhs) { // Domains don't match, we have complex/float mix. 5254 if (lhs->isRealFloatingType()) { // handle "double, _Complex double". 5255 return rhs; 5256 } else { // handle "_Complex double, double". 5257 return lhs; 5258 } 5259 } 5260 return lhs; // The domain/size match exactly. 5261 } 5262 // Now handle "real" floating types (i.e. float, double, long double). 5263 if (lhs->isRealFloatingType() || rhs->isRealFloatingType()) { 5264 // if we have an integer operand, the result is the real floating type. 5265 if (rhs->isIntegerType()) { 5266 // convert rhs to the lhs floating point type. 5267 return lhs; 5268 } 5269 if (rhs->isComplexIntegerType()) { 5270 // convert rhs to the complex floating point type. 5271 return getComplexType(lhs); 5272 } 5273 if (lhs->isIntegerType()) { 5274 // convert lhs to the rhs floating point type. 5275 return rhs; 5276 } 5277 if (lhs->isComplexIntegerType()) { 5278 // convert lhs to the complex floating point type. 5279 return getComplexType(rhs); 5280 } 5281 // We have two real floating types, float/complex combos were handled above. 5282 // Convert the smaller operand to the bigger result. 5283 int result = getFloatingTypeOrder(lhs, rhs); 5284 if (result > 0) // convert the rhs 5285 return lhs; 5286 assert(result < 0 && "illegal float comparison"); 5287 return rhs; // convert the lhs 5288 } 5289 if (lhs->isComplexIntegerType() || rhs->isComplexIntegerType()) { 5290 // Handle GCC complex int extension. 5291 const ComplexType *lhsComplexInt = lhs->getAsComplexIntegerType(); 5292 const ComplexType *rhsComplexInt = rhs->getAsComplexIntegerType(); 5293 5294 if (lhsComplexInt && rhsComplexInt) { 5295 if (getIntegerTypeOrder(lhsComplexInt->getElementType(), 5296 rhsComplexInt->getElementType()) >= 0) 5297 return lhs; // convert the rhs 5298 return rhs; 5299 } else if (lhsComplexInt && rhs->isIntegerType()) { 5300 // convert the rhs to the lhs complex type. 5301 return lhs; 5302 } else if (rhsComplexInt && lhs->isIntegerType()) { 5303 // convert the lhs to the rhs complex type. 5304 return rhs; 5305 } 5306 } 5307 // Finally, we have two differing integer types. 5308 // The rules for this case are in C99 6.3.1.8 5309 int compare = getIntegerTypeOrder(lhs, rhs); 5310 bool lhsSigned = lhs->isSignedIntegerType(), 5311 rhsSigned = rhs->isSignedIntegerType(); 5312 QualType destType; 5313 if (lhsSigned == rhsSigned) { 5314 // Same signedness; use the higher-ranked type 5315 destType = compare >= 0 ? lhs : rhs; 5316 } else if (compare != (lhsSigned ? 1 : -1)) { 5317 // The unsigned type has greater than or equal rank to the 5318 // signed type, so use the unsigned type 5319 destType = lhsSigned ? rhs : lhs; 5320 } else if (getIntWidth(lhs) != getIntWidth(rhs)) { 5321 // The two types are different widths; if we are here, that 5322 // means the signed type is larger than the unsigned type, so 5323 // use the signed type. 5324 destType = lhsSigned ? lhs : rhs; 5325 } else { 5326 // The signed type is higher-ranked than the unsigned type, 5327 // but isn't actually any bigger (like unsigned int and long 5328 // on most 32-bit systems). Use the unsigned type corresponding 5329 // to the signed type. 5330 destType = getCorrespondingUnsignedType(lhsSigned ? lhs : rhs); 5331 } 5332 return destType; 5333} 5334