ASTContext.cpp revision f057bf78a69d37ee511430c88852a85eea19ad15
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 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) { 872 for (ObjCCategoryDecl::ivar_iterator I = CDecl->ivar_begin(), 873 E = CDecl->ivar_end(); I != E; ++I) { 874 Ivars.push_back(*I); 875 } 876 } 877 878 // Also add any ivar defined in this class's implementation. This 879 // includes synthesized ivars. 880 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) { 881 for (ObjCImplementationDecl::ivar_iterator I = ImplDecl->ivar_begin(), 882 E = ImplDecl->ivar_end(); I != E; ++I) 883 Ivars.push_back(*I); 884 } 885} 886 887/// CollectInheritedProtocols - Collect all protocols in current class and 888/// those inherited by it. 889void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 890 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 891 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 892 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 893 PE = OI->protocol_end(); P != PE; ++P) { 894 ObjCProtocolDecl *Proto = (*P); 895 Protocols.insert(Proto); 896 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 897 PE = Proto->protocol_end(); P != PE; ++P) { 898 Protocols.insert(*P); 899 CollectInheritedProtocols(*P, Protocols); 900 } 901 } 902 903 // Categories of this Interface. 904 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 905 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 906 CollectInheritedProtocols(CDeclChain, Protocols); 907 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 908 while (SD) { 909 CollectInheritedProtocols(SD, Protocols); 910 SD = SD->getSuperClass(); 911 } 912 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 913 for (ObjCInterfaceDecl::protocol_iterator P = OC->protocol_begin(), 914 PE = OC->protocol_end(); P != PE; ++P) { 915 ObjCProtocolDecl *Proto = (*P); 916 Protocols.insert(Proto); 917 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 918 PE = Proto->protocol_end(); P != PE; ++P) 919 CollectInheritedProtocols(*P, Protocols); 920 } 921 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 922 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 923 PE = OP->protocol_end(); P != PE; ++P) { 924 ObjCProtocolDecl *Proto = (*P); 925 Protocols.insert(Proto); 926 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 927 PE = Proto->protocol_end(); P != PE; ++P) 928 CollectInheritedProtocols(*P, Protocols); 929 } 930 } 931} 932 933unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) { 934 unsigned count = 0; 935 // Count ivars declared in class extension. 936 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) 937 count += CDecl->ivar_size(); 938 939 // Count ivar defined in this class's implementation. This 940 // includes synthesized ivars. 941 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 942 count += ImplDecl->ivar_size(); 943 944 return count; 945} 946 947/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 948ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 949 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 950 I = ObjCImpls.find(D); 951 if (I != ObjCImpls.end()) 952 return cast<ObjCImplementationDecl>(I->second); 953 return 0; 954} 955/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 956ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 957 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 958 I = ObjCImpls.find(D); 959 if (I != ObjCImpls.end()) 960 return cast<ObjCCategoryImplDecl>(I->second); 961 return 0; 962} 963 964/// \brief Set the implementation of ObjCInterfaceDecl. 965void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 966 ObjCImplementationDecl *ImplD) { 967 assert(IFaceD && ImplD && "Passed null params"); 968 ObjCImpls[IFaceD] = ImplD; 969} 970/// \brief Set the implementation of ObjCCategoryDecl. 971void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 972 ObjCCategoryImplDecl *ImplD) { 973 assert(CatD && ImplD && "Passed null params"); 974 ObjCImpls[CatD] = ImplD; 975} 976 977/// \brief Allocate an uninitialized TypeSourceInfo. 978/// 979/// The caller should initialize the memory held by TypeSourceInfo using 980/// the TypeLoc wrappers. 981/// 982/// \param T the type that will be the basis for type source info. This type 983/// should refer to how the declarator was written in source code, not to 984/// what type semantic analysis resolved the declarator to. 985TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 986 unsigned DataSize) { 987 if (!DataSize) 988 DataSize = TypeLoc::getFullDataSizeForType(T); 989 else 990 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 991 "incorrect data size provided to CreateTypeSourceInfo!"); 992 993 TypeSourceInfo *TInfo = 994 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 995 new (TInfo) TypeSourceInfo(T); 996 return TInfo; 997} 998 999TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1000 SourceLocation L) { 1001 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1002 DI->getTypeLoc().initialize(L); 1003 return DI; 1004} 1005 1006const ASTRecordLayout & 1007ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 1008 return getObjCLayout(D, 0); 1009} 1010 1011const ASTRecordLayout & 1012ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 1013 return getObjCLayout(D->getClassInterface(), D); 1014} 1015 1016//===----------------------------------------------------------------------===// 1017// Type creation/memoization methods 1018//===----------------------------------------------------------------------===// 1019 1020QualType ASTContext::getExtQualType(const Type *TypeNode, Qualifiers Quals) { 1021 unsigned Fast = Quals.getFastQualifiers(); 1022 Quals.removeFastQualifiers(); 1023 1024 // Check if we've already instantiated this type. 1025 llvm::FoldingSetNodeID ID; 1026 ExtQuals::Profile(ID, TypeNode, Quals); 1027 void *InsertPos = 0; 1028 if (ExtQuals *EQ = ExtQualNodes.FindNodeOrInsertPos(ID, InsertPos)) { 1029 assert(EQ->getQualifiers() == Quals); 1030 QualType T = QualType(EQ, Fast); 1031 return T; 1032 } 1033 1034 ExtQuals *New = new (*this, TypeAlignment) ExtQuals(*this, TypeNode, Quals); 1035 ExtQualNodes.InsertNode(New, InsertPos); 1036 QualType T = QualType(New, Fast); 1037 return T; 1038} 1039 1040QualType ASTContext::getVolatileType(QualType T) { 1041 QualType CanT = getCanonicalType(T); 1042 if (CanT.isVolatileQualified()) return T; 1043 1044 QualifierCollector Quals; 1045 const Type *TypeNode = Quals.strip(T); 1046 Quals.addVolatile(); 1047 1048 return getExtQualType(TypeNode, Quals); 1049} 1050 1051QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 1052 QualType CanT = getCanonicalType(T); 1053 if (CanT.getAddressSpace() == AddressSpace) 1054 return T; 1055 1056 // If we are composing extended qualifiers together, merge together 1057 // into one ExtQuals node. 1058 QualifierCollector Quals; 1059 const Type *TypeNode = Quals.strip(T); 1060 1061 // If this type already has an address space specified, it cannot get 1062 // another one. 1063 assert(!Quals.hasAddressSpace() && 1064 "Type cannot be in multiple addr spaces!"); 1065 Quals.addAddressSpace(AddressSpace); 1066 1067 return getExtQualType(TypeNode, Quals); 1068} 1069 1070QualType ASTContext::getObjCGCQualType(QualType T, 1071 Qualifiers::GC GCAttr) { 1072 QualType CanT = getCanonicalType(T); 1073 if (CanT.getObjCGCAttr() == GCAttr) 1074 return T; 1075 1076 if (T->isPointerType()) { 1077 QualType Pointee = T->getAs<PointerType>()->getPointeeType(); 1078 if (Pointee->isAnyPointerType()) { 1079 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1080 return getPointerType(ResultType); 1081 } 1082 } 1083 1084 // If we are composing extended qualifiers together, merge together 1085 // into one ExtQuals node. 1086 QualifierCollector Quals; 1087 const Type *TypeNode = Quals.strip(T); 1088 1089 // If this type already has an ObjCGC specified, it cannot get 1090 // another one. 1091 assert(!Quals.hasObjCGCAttr() && 1092 "Type cannot have multiple ObjCGCs!"); 1093 Quals.addObjCGCAttr(GCAttr); 1094 1095 return getExtQualType(TypeNode, Quals); 1096} 1097 1098static QualType getExtFunctionType(ASTContext& Context, QualType T, 1099 const FunctionType::ExtInfo &Info) { 1100 QualType ResultType; 1101 if (const PointerType *Pointer = T->getAs<PointerType>()) { 1102 QualType Pointee = Pointer->getPointeeType(); 1103 ResultType = getExtFunctionType(Context, Pointee, Info); 1104 if (ResultType == Pointee) 1105 return T; 1106 1107 ResultType = Context.getPointerType(ResultType); 1108 } else if (const BlockPointerType *BlockPointer 1109 = T->getAs<BlockPointerType>()) { 1110 QualType Pointee = BlockPointer->getPointeeType(); 1111 ResultType = getExtFunctionType(Context, Pointee, Info); 1112 if (ResultType == Pointee) 1113 return T; 1114 1115 ResultType = Context.getBlockPointerType(ResultType); 1116 } else if (const FunctionType *F = T->getAs<FunctionType>()) { 1117 if (F->getExtInfo() == Info) 1118 return T; 1119 1120 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(F)) { 1121 ResultType = Context.getFunctionNoProtoType(FNPT->getResultType(), 1122 Info); 1123 } else { 1124 const FunctionProtoType *FPT = cast<FunctionProtoType>(F); 1125 ResultType 1126 = Context.getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1127 FPT->getNumArgs(), FPT->isVariadic(), 1128 FPT->getTypeQuals(), 1129 FPT->hasExceptionSpec(), 1130 FPT->hasAnyExceptionSpec(), 1131 FPT->getNumExceptions(), 1132 FPT->exception_begin(), 1133 Info); 1134 } 1135 } else 1136 return T; 1137 1138 return Context.getQualifiedType(ResultType, T.getLocalQualifiers()); 1139} 1140 1141QualType ASTContext::getNoReturnType(QualType T, bool AddNoReturn) { 1142 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1143 return getExtFunctionType(*this, T, 1144 Info.withNoReturn(AddNoReturn)); 1145} 1146 1147QualType ASTContext::getCallConvType(QualType T, CallingConv CallConv) { 1148 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1149 return getExtFunctionType(*this, T, 1150 Info.withCallingConv(CallConv)); 1151} 1152 1153QualType ASTContext::getRegParmType(QualType T, unsigned RegParm) { 1154 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1155 return getExtFunctionType(*this, T, 1156 Info.withRegParm(RegParm)); 1157} 1158 1159/// getComplexType - Return the uniqued reference to the type for a complex 1160/// number with the specified element type. 1161QualType ASTContext::getComplexType(QualType T) { 1162 // Unique pointers, to guarantee there is only one pointer of a particular 1163 // structure. 1164 llvm::FoldingSetNodeID ID; 1165 ComplexType::Profile(ID, T); 1166 1167 void *InsertPos = 0; 1168 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1169 return QualType(CT, 0); 1170 1171 // If the pointee type isn't canonical, this won't be a canonical type either, 1172 // so fill in the canonical type field. 1173 QualType Canonical; 1174 if (!T.isCanonical()) { 1175 Canonical = getComplexType(getCanonicalType(T)); 1176 1177 // Get the new insert position for the node we care about. 1178 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1179 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1180 } 1181 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1182 Types.push_back(New); 1183 ComplexTypes.InsertNode(New, InsertPos); 1184 return QualType(New, 0); 1185} 1186 1187/// getPointerType - Return the uniqued reference to the type for a pointer to 1188/// the specified type. 1189QualType ASTContext::getPointerType(QualType T) { 1190 // Unique pointers, to guarantee there is only one pointer of a particular 1191 // structure. 1192 llvm::FoldingSetNodeID ID; 1193 PointerType::Profile(ID, T); 1194 1195 void *InsertPos = 0; 1196 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1197 return QualType(PT, 0); 1198 1199 // If the pointee type isn't canonical, this won't be a canonical type either, 1200 // so fill in the canonical type field. 1201 QualType Canonical; 1202 if (!T.isCanonical()) { 1203 Canonical = getPointerType(getCanonicalType(T)); 1204 1205 // Get the new insert position for the node we care about. 1206 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1207 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1208 } 1209 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1210 Types.push_back(New); 1211 PointerTypes.InsertNode(New, InsertPos); 1212 return QualType(New, 0); 1213} 1214 1215/// getBlockPointerType - Return the uniqued reference to the type for 1216/// a pointer to the specified block. 1217QualType ASTContext::getBlockPointerType(QualType T) { 1218 assert(T->isFunctionType() && "block of function types only"); 1219 // Unique pointers, to guarantee there is only one block of a particular 1220 // structure. 1221 llvm::FoldingSetNodeID ID; 1222 BlockPointerType::Profile(ID, T); 1223 1224 void *InsertPos = 0; 1225 if (BlockPointerType *PT = 1226 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1227 return QualType(PT, 0); 1228 1229 // If the block pointee type isn't canonical, this won't be a canonical 1230 // type either so fill in the canonical type field. 1231 QualType Canonical; 1232 if (!T.isCanonical()) { 1233 Canonical = getBlockPointerType(getCanonicalType(T)); 1234 1235 // Get the new insert position for the node we care about. 1236 BlockPointerType *NewIP = 1237 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1238 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1239 } 1240 BlockPointerType *New 1241 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1242 Types.push_back(New); 1243 BlockPointerTypes.InsertNode(New, InsertPos); 1244 return QualType(New, 0); 1245} 1246 1247/// getLValueReferenceType - Return the uniqued reference to the type for an 1248/// lvalue reference to the specified type. 1249QualType ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) { 1250 // Unique pointers, to guarantee there is only one pointer of a particular 1251 // structure. 1252 llvm::FoldingSetNodeID ID; 1253 ReferenceType::Profile(ID, T, SpelledAsLValue); 1254 1255 void *InsertPos = 0; 1256 if (LValueReferenceType *RT = 1257 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1258 return QualType(RT, 0); 1259 1260 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1261 1262 // If the referencee type isn't canonical, this won't be a canonical type 1263 // either, so fill in the canonical type field. 1264 QualType Canonical; 1265 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1266 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1267 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1268 1269 // Get the new insert position for the node we care about. 1270 LValueReferenceType *NewIP = 1271 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1272 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1273 } 1274 1275 LValueReferenceType *New 1276 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1277 SpelledAsLValue); 1278 Types.push_back(New); 1279 LValueReferenceTypes.InsertNode(New, InsertPos); 1280 1281 return QualType(New, 0); 1282} 1283 1284/// getRValueReferenceType - Return the uniqued reference to the type for an 1285/// rvalue reference to the specified type. 1286QualType ASTContext::getRValueReferenceType(QualType T) { 1287 // Unique pointers, to guarantee there is only one pointer of a particular 1288 // structure. 1289 llvm::FoldingSetNodeID ID; 1290 ReferenceType::Profile(ID, T, false); 1291 1292 void *InsertPos = 0; 1293 if (RValueReferenceType *RT = 1294 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1295 return QualType(RT, 0); 1296 1297 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1298 1299 // If the referencee type isn't canonical, this won't be a canonical type 1300 // either, so fill in the canonical type field. 1301 QualType Canonical; 1302 if (InnerRef || !T.isCanonical()) { 1303 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1304 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1305 1306 // Get the new insert position for the node we care about. 1307 RValueReferenceType *NewIP = 1308 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1309 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1310 } 1311 1312 RValueReferenceType *New 1313 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1314 Types.push_back(New); 1315 RValueReferenceTypes.InsertNode(New, InsertPos); 1316 return QualType(New, 0); 1317} 1318 1319/// getMemberPointerType - Return the uniqued reference to the type for a 1320/// member pointer to the specified type, in the specified class. 1321QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) { 1322 // Unique pointers, to guarantee there is only one pointer of a particular 1323 // structure. 1324 llvm::FoldingSetNodeID ID; 1325 MemberPointerType::Profile(ID, T, Cls); 1326 1327 void *InsertPos = 0; 1328 if (MemberPointerType *PT = 1329 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1330 return QualType(PT, 0); 1331 1332 // If the pointee or class type isn't canonical, this won't be a canonical 1333 // type either, so fill in the canonical type field. 1334 QualType Canonical; 1335 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1336 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1337 1338 // Get the new insert position for the node we care about. 1339 MemberPointerType *NewIP = 1340 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1341 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1342 } 1343 MemberPointerType *New 1344 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1345 Types.push_back(New); 1346 MemberPointerTypes.InsertNode(New, InsertPos); 1347 return QualType(New, 0); 1348} 1349 1350/// getConstantArrayType - Return the unique reference to the type for an 1351/// array of the specified element type. 1352QualType ASTContext::getConstantArrayType(QualType EltTy, 1353 const llvm::APInt &ArySizeIn, 1354 ArrayType::ArraySizeModifier ASM, 1355 unsigned EltTypeQuals) { 1356 assert((EltTy->isDependentType() || 1357 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1358 "Constant array of VLAs is illegal!"); 1359 1360 // Convert the array size into a canonical width matching the pointer size for 1361 // the target. 1362 llvm::APInt ArySize(ArySizeIn); 1363 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1364 1365 llvm::FoldingSetNodeID ID; 1366 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1367 1368 void *InsertPos = 0; 1369 if (ConstantArrayType *ATP = 1370 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1371 return QualType(ATP, 0); 1372 1373 // If the element type isn't canonical, this won't be a canonical type either, 1374 // so fill in the canonical type field. 1375 QualType Canonical; 1376 if (!EltTy.isCanonical()) { 1377 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1378 ASM, EltTypeQuals); 1379 // Get the new insert position for the node we care about. 1380 ConstantArrayType *NewIP = 1381 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1382 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1383 } 1384 1385 ConstantArrayType *New = new(*this,TypeAlignment) 1386 ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1387 ConstantArrayTypes.InsertNode(New, InsertPos); 1388 Types.push_back(New); 1389 return QualType(New, 0); 1390} 1391 1392/// getVariableArrayType - Returns a non-unique reference to the type for a 1393/// variable array of the specified element type. 1394QualType ASTContext::getVariableArrayType(QualType EltTy, 1395 Expr *NumElts, 1396 ArrayType::ArraySizeModifier ASM, 1397 unsigned EltTypeQuals, 1398 SourceRange Brackets) { 1399 // Since we don't unique expressions, it isn't possible to unique VLA's 1400 // that have an expression provided for their size. 1401 QualType CanonType; 1402 1403 if (!EltTy.isCanonical()) { 1404 if (NumElts) 1405 NumElts->Retain(); 1406 CanonType = getVariableArrayType(getCanonicalType(EltTy), NumElts, ASM, 1407 EltTypeQuals, Brackets); 1408 } 1409 1410 VariableArrayType *New = new(*this, TypeAlignment) 1411 VariableArrayType(EltTy, CanonType, NumElts, ASM, EltTypeQuals, Brackets); 1412 1413 VariableArrayTypes.push_back(New); 1414 Types.push_back(New); 1415 return QualType(New, 0); 1416} 1417 1418/// getDependentSizedArrayType - Returns a non-unique reference to 1419/// the type for a dependently-sized array of the specified element 1420/// type. 1421QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1422 Expr *NumElts, 1423 ArrayType::ArraySizeModifier ASM, 1424 unsigned EltTypeQuals, 1425 SourceRange Brackets) { 1426 assert((!NumElts || NumElts->isTypeDependent() || 1427 NumElts->isValueDependent()) && 1428 "Size must be type- or value-dependent!"); 1429 1430 void *InsertPos = 0; 1431 DependentSizedArrayType *Canon = 0; 1432 llvm::FoldingSetNodeID ID; 1433 1434 if (NumElts) { 1435 // Dependently-sized array types that do not have a specified 1436 // number of elements will have their sizes deduced from an 1437 // initializer. 1438 DependentSizedArrayType::Profile(ID, *this, getCanonicalType(EltTy), ASM, 1439 EltTypeQuals, NumElts); 1440 1441 Canon = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1442 } 1443 1444 DependentSizedArrayType *New; 1445 if (Canon) { 1446 // We already have a canonical version of this array type; use it as 1447 // the canonical type for a newly-built type. 1448 New = new (*this, TypeAlignment) 1449 DependentSizedArrayType(*this, EltTy, QualType(Canon, 0), 1450 NumElts, ASM, EltTypeQuals, Brackets); 1451 } else { 1452 QualType CanonEltTy = getCanonicalType(EltTy); 1453 if (CanonEltTy == EltTy) { 1454 New = new (*this, TypeAlignment) 1455 DependentSizedArrayType(*this, EltTy, QualType(), 1456 NumElts, ASM, EltTypeQuals, Brackets); 1457 1458 if (NumElts) { 1459 DependentSizedArrayType *CanonCheck 1460 = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1461 assert(!CanonCheck && "Dependent-sized canonical array type broken"); 1462 (void)CanonCheck; 1463 DependentSizedArrayTypes.InsertNode(New, InsertPos); 1464 } 1465 } else { 1466 QualType Canon = getDependentSizedArrayType(CanonEltTy, NumElts, 1467 ASM, EltTypeQuals, 1468 SourceRange()); 1469 New = new (*this, TypeAlignment) 1470 DependentSizedArrayType(*this, EltTy, Canon, 1471 NumElts, ASM, EltTypeQuals, Brackets); 1472 } 1473 } 1474 1475 Types.push_back(New); 1476 return QualType(New, 0); 1477} 1478 1479QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1480 ArrayType::ArraySizeModifier ASM, 1481 unsigned EltTypeQuals) { 1482 llvm::FoldingSetNodeID ID; 1483 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1484 1485 void *InsertPos = 0; 1486 if (IncompleteArrayType *ATP = 1487 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1488 return QualType(ATP, 0); 1489 1490 // If the element type isn't canonical, this won't be a canonical type 1491 // either, so fill in the canonical type field. 1492 QualType Canonical; 1493 1494 if (!EltTy.isCanonical()) { 1495 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1496 ASM, EltTypeQuals); 1497 1498 // Get the new insert position for the node we care about. 1499 IncompleteArrayType *NewIP = 1500 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1501 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1502 } 1503 1504 IncompleteArrayType *New = new (*this, TypeAlignment) 1505 IncompleteArrayType(EltTy, Canonical, ASM, EltTypeQuals); 1506 1507 IncompleteArrayTypes.InsertNode(New, InsertPos); 1508 Types.push_back(New); 1509 return QualType(New, 0); 1510} 1511 1512/// getVectorType - Return the unique reference to a vector type of 1513/// the specified element type and size. VectorType must be a built-in type. 1514QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1515 bool IsAltiVec, bool IsPixel) { 1516 BuiltinType *baseType; 1517 1518 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1519 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1520 1521 // Check if we've already instantiated a vector of this type. 1522 llvm::FoldingSetNodeID ID; 1523 VectorType::Profile(ID, vecType, NumElts, Type::Vector, 1524 IsAltiVec, IsPixel); 1525 void *InsertPos = 0; 1526 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1527 return QualType(VTP, 0); 1528 1529 // If the element type isn't canonical, this won't be a canonical type either, 1530 // so fill in the canonical type field. 1531 QualType Canonical; 1532 if (!vecType.isCanonical() || IsAltiVec || IsPixel) { 1533 Canonical = getVectorType(getCanonicalType(vecType), 1534 NumElts, false, false); 1535 1536 // Get the new insert position for the node we care about. 1537 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1538 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1539 } 1540 VectorType *New = new (*this, TypeAlignment) 1541 VectorType(vecType, NumElts, Canonical, IsAltiVec, IsPixel); 1542 VectorTypes.InsertNode(New, InsertPos); 1543 Types.push_back(New); 1544 return QualType(New, 0); 1545} 1546 1547/// getExtVectorType - Return the unique reference to an extended vector type of 1548/// the specified element type and size. VectorType must be a built-in type. 1549QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1550 BuiltinType *baseType; 1551 1552 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1553 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1554 1555 // Check if we've already instantiated a vector of this type. 1556 llvm::FoldingSetNodeID ID; 1557 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, false, false); 1558 void *InsertPos = 0; 1559 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1560 return QualType(VTP, 0); 1561 1562 // If the element type isn't canonical, this won't be a canonical type either, 1563 // so fill in the canonical type field. 1564 QualType Canonical; 1565 if (!vecType.isCanonical()) { 1566 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1567 1568 // Get the new insert position for the node we care about. 1569 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1570 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1571 } 1572 ExtVectorType *New = new (*this, TypeAlignment) 1573 ExtVectorType(vecType, NumElts, Canonical); 1574 VectorTypes.InsertNode(New, InsertPos); 1575 Types.push_back(New); 1576 return QualType(New, 0); 1577} 1578 1579QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1580 Expr *SizeExpr, 1581 SourceLocation AttrLoc) { 1582 llvm::FoldingSetNodeID ID; 1583 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1584 SizeExpr); 1585 1586 void *InsertPos = 0; 1587 DependentSizedExtVectorType *Canon 1588 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1589 DependentSizedExtVectorType *New; 1590 if (Canon) { 1591 // We already have a canonical version of this array type; use it as 1592 // the canonical type for a newly-built type. 1593 New = new (*this, TypeAlignment) 1594 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1595 SizeExpr, AttrLoc); 1596 } else { 1597 QualType CanonVecTy = getCanonicalType(vecType); 1598 if (CanonVecTy == vecType) { 1599 New = new (*this, TypeAlignment) 1600 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1601 AttrLoc); 1602 1603 DependentSizedExtVectorType *CanonCheck 1604 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1605 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1606 (void)CanonCheck; 1607 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1608 } else { 1609 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1610 SourceLocation()); 1611 New = new (*this, TypeAlignment) 1612 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1613 } 1614 } 1615 1616 Types.push_back(New); 1617 return QualType(New, 0); 1618} 1619 1620/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1621/// 1622QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, 1623 const FunctionType::ExtInfo &Info) { 1624 const CallingConv CallConv = Info.getCC(); 1625 // Unique functions, to guarantee there is only one function of a particular 1626 // structure. 1627 llvm::FoldingSetNodeID ID; 1628 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1629 1630 void *InsertPos = 0; 1631 if (FunctionNoProtoType *FT = 1632 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1633 return QualType(FT, 0); 1634 1635 QualType Canonical; 1636 if (!ResultTy.isCanonical() || 1637 getCanonicalCallConv(CallConv) != CallConv) { 1638 Canonical = 1639 getFunctionNoProtoType(getCanonicalType(ResultTy), 1640 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1641 1642 // Get the new insert position for the node we care about. 1643 FunctionNoProtoType *NewIP = 1644 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1645 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1646 } 1647 1648 FunctionNoProtoType *New = new (*this, TypeAlignment) 1649 FunctionNoProtoType(ResultTy, Canonical, Info); 1650 Types.push_back(New); 1651 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1652 return QualType(New, 0); 1653} 1654 1655/// getFunctionType - Return a normal function type with a typed argument 1656/// list. isVariadic indicates whether the argument list includes '...'. 1657QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1658 unsigned NumArgs, bool isVariadic, 1659 unsigned TypeQuals, bool hasExceptionSpec, 1660 bool hasAnyExceptionSpec, unsigned NumExs, 1661 const QualType *ExArray, 1662 const FunctionType::ExtInfo &Info) { 1663 const CallingConv CallConv= Info.getCC(); 1664 // Unique functions, to guarantee there is only one function of a particular 1665 // structure. 1666 llvm::FoldingSetNodeID ID; 1667 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1668 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1669 NumExs, ExArray, Info); 1670 1671 void *InsertPos = 0; 1672 if (FunctionProtoType *FTP = 1673 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1674 return QualType(FTP, 0); 1675 1676 // Determine whether the type being created is already canonical or not. 1677 bool isCanonical = !hasExceptionSpec && ResultTy.isCanonical(); 1678 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1679 if (!ArgArray[i].isCanonicalAsParam()) 1680 isCanonical = false; 1681 1682 // If this type isn't canonical, get the canonical version of it. 1683 // The exception spec is not part of the canonical type. 1684 QualType Canonical; 1685 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1686 llvm::SmallVector<QualType, 16> CanonicalArgs; 1687 CanonicalArgs.reserve(NumArgs); 1688 for (unsigned i = 0; i != NumArgs; ++i) 1689 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1690 1691 Canonical = getFunctionType(getCanonicalType(ResultTy), 1692 CanonicalArgs.data(), NumArgs, 1693 isVariadic, TypeQuals, false, 1694 false, 0, 0, 1695 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1696 1697 // Get the new insert position for the node we care about. 1698 FunctionProtoType *NewIP = 1699 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1700 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1701 } 1702 1703 // FunctionProtoType objects are allocated with extra bytes after them 1704 // for two variable size arrays (for parameter and exception types) at the 1705 // end of them. 1706 FunctionProtoType *FTP = 1707 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1708 NumArgs*sizeof(QualType) + 1709 NumExs*sizeof(QualType), TypeAlignment); 1710 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1711 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1712 ExArray, NumExs, Canonical, Info); 1713 Types.push_back(FTP); 1714 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1715 return QualType(FTP, 0); 1716} 1717 1718#ifndef NDEBUG 1719static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1720 if (!isa<CXXRecordDecl>(D)) return false; 1721 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1722 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1723 return true; 1724 if (RD->getDescribedClassTemplate() && 1725 !isa<ClassTemplateSpecializationDecl>(RD)) 1726 return true; 1727 return false; 1728} 1729#endif 1730 1731/// getInjectedClassNameType - Return the unique reference to the 1732/// injected class name type for the specified templated declaration. 1733QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1734 QualType TST) { 1735 assert(NeedsInjectedClassNameType(Decl)); 1736 if (Decl->TypeForDecl) { 1737 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1738 } else if (CXXRecordDecl *PrevDecl 1739 = cast_or_null<CXXRecordDecl>(Decl->getPreviousDeclaration())) { 1740 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1741 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1742 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1743 } else { 1744 Decl->TypeForDecl = 1745 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 1746 Types.push_back(Decl->TypeForDecl); 1747 } 1748 return QualType(Decl->TypeForDecl, 0); 1749} 1750 1751/// getTypeDeclType - Return the unique reference to the type for the 1752/// specified type declaration. 1753QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) { 1754 assert(Decl && "Passed null for Decl param"); 1755 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 1756 1757 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1758 return getTypedefType(Typedef); 1759 1760 assert(!isa<TemplateTypeParmDecl>(Decl) && 1761 "Template type parameter types are always available."); 1762 1763 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1764 assert(!Record->getPreviousDeclaration() && 1765 "struct/union has previous declaration"); 1766 assert(!NeedsInjectedClassNameType(Record)); 1767 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Record); 1768 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1769 assert(!Enum->getPreviousDeclaration() && 1770 "enum has previous declaration"); 1771 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Enum); 1772 } else if (const UnresolvedUsingTypenameDecl *Using = 1773 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1774 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1775 } else 1776 llvm_unreachable("TypeDecl without a type?"); 1777 1778 Types.push_back(Decl->TypeForDecl); 1779 return QualType(Decl->TypeForDecl, 0); 1780} 1781 1782/// getTypedefType - Return the unique reference to the type for the 1783/// specified typename decl. 1784QualType ASTContext::getTypedefType(const TypedefDecl *Decl) { 1785 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1786 1787 QualType Canonical = getCanonicalType(Decl->getUnderlyingType()); 1788 Decl->TypeForDecl = new(*this, TypeAlignment) 1789 TypedefType(Type::Typedef, Decl, Canonical); 1790 Types.push_back(Decl->TypeForDecl); 1791 return QualType(Decl->TypeForDecl, 0); 1792} 1793 1794/// \brief Retrieve a substitution-result type. 1795QualType 1796ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1797 QualType Replacement) { 1798 assert(Replacement.isCanonical() 1799 && "replacement types must always be canonical"); 1800 1801 llvm::FoldingSetNodeID ID; 1802 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1803 void *InsertPos = 0; 1804 SubstTemplateTypeParmType *SubstParm 1805 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1806 1807 if (!SubstParm) { 1808 SubstParm = new (*this, TypeAlignment) 1809 SubstTemplateTypeParmType(Parm, Replacement); 1810 Types.push_back(SubstParm); 1811 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1812 } 1813 1814 return QualType(SubstParm, 0); 1815} 1816 1817/// \brief Retrieve the template type parameter type for a template 1818/// parameter or parameter pack with the given depth, index, and (optionally) 1819/// name. 1820QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1821 bool ParameterPack, 1822 IdentifierInfo *Name) { 1823 llvm::FoldingSetNodeID ID; 1824 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1825 void *InsertPos = 0; 1826 TemplateTypeParmType *TypeParm 1827 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1828 1829 if (TypeParm) 1830 return QualType(TypeParm, 0); 1831 1832 if (Name) { 1833 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1834 TypeParm = new (*this, TypeAlignment) 1835 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 1836 1837 TemplateTypeParmType *TypeCheck 1838 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1839 assert(!TypeCheck && "Template type parameter canonical type broken"); 1840 (void)TypeCheck; 1841 } else 1842 TypeParm = new (*this, TypeAlignment) 1843 TemplateTypeParmType(Depth, Index, ParameterPack); 1844 1845 Types.push_back(TypeParm); 1846 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1847 1848 return QualType(TypeParm, 0); 1849} 1850 1851TypeSourceInfo * 1852ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 1853 SourceLocation NameLoc, 1854 const TemplateArgumentListInfo &Args, 1855 QualType CanonType) { 1856 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 1857 1858 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 1859 TemplateSpecializationTypeLoc TL 1860 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 1861 TL.setTemplateNameLoc(NameLoc); 1862 TL.setLAngleLoc(Args.getLAngleLoc()); 1863 TL.setRAngleLoc(Args.getRAngleLoc()); 1864 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 1865 TL.setArgLocInfo(i, Args[i].getLocInfo()); 1866 return DI; 1867} 1868 1869QualType 1870ASTContext::getTemplateSpecializationType(TemplateName Template, 1871 const TemplateArgumentListInfo &Args, 1872 QualType Canon) { 1873 unsigned NumArgs = Args.size(); 1874 1875 llvm::SmallVector<TemplateArgument, 4> ArgVec; 1876 ArgVec.reserve(NumArgs); 1877 for (unsigned i = 0; i != NumArgs; ++i) 1878 ArgVec.push_back(Args[i].getArgument()); 1879 1880 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 1881 Canon); 1882} 1883 1884QualType 1885ASTContext::getTemplateSpecializationType(TemplateName Template, 1886 const TemplateArgument *Args, 1887 unsigned NumArgs, 1888 QualType Canon) { 1889 if (!Canon.isNull()) 1890 Canon = getCanonicalType(Canon); 1891 else { 1892 // Build the canonical template specialization type. 1893 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 1894 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 1895 CanonArgs.reserve(NumArgs); 1896 for (unsigned I = 0; I != NumArgs; ++I) 1897 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 1898 1899 // Determine whether this canonical template specialization type already 1900 // exists. 1901 llvm::FoldingSetNodeID ID; 1902 TemplateSpecializationType::Profile(ID, CanonTemplate, 1903 CanonArgs.data(), NumArgs, *this); 1904 1905 void *InsertPos = 0; 1906 TemplateSpecializationType *Spec 1907 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1908 1909 if (!Spec) { 1910 // Allocate a new canonical template specialization type. 1911 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1912 sizeof(TemplateArgument) * NumArgs), 1913 TypeAlignment); 1914 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 1915 CanonArgs.data(), NumArgs, 1916 Canon); 1917 Types.push_back(Spec); 1918 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1919 } 1920 1921 if (Canon.isNull()) 1922 Canon = QualType(Spec, 0); 1923 assert(Canon->isDependentType() && 1924 "Non-dependent template-id type must have a canonical type"); 1925 } 1926 1927 // Allocate the (non-canonical) template specialization type, but don't 1928 // try to unique it: these types typically have location information that 1929 // we don't unique and don't want to lose. 1930 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1931 sizeof(TemplateArgument) * NumArgs), 1932 TypeAlignment); 1933 TemplateSpecializationType *Spec 1934 = new (Mem) TemplateSpecializationType(Template, 1935 Args, NumArgs, 1936 Canon); 1937 1938 Types.push_back(Spec); 1939 return QualType(Spec, 0); 1940} 1941 1942QualType 1943ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 1944 NestedNameSpecifier *NNS, 1945 QualType NamedType) { 1946 llvm::FoldingSetNodeID ID; 1947 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 1948 1949 void *InsertPos = 0; 1950 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1951 if (T) 1952 return QualType(T, 0); 1953 1954 QualType Canon = NamedType; 1955 if (!Canon.isCanonical()) { 1956 Canon = getCanonicalType(NamedType); 1957 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1958 assert(!CheckT && "Elaborated canonical type broken"); 1959 (void)CheckT; 1960 } 1961 1962 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 1963 Types.push_back(T); 1964 ElaboratedTypes.InsertNode(T, InsertPos); 1965 return QualType(T, 0); 1966} 1967 1968QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 1969 NestedNameSpecifier *NNS, 1970 const IdentifierInfo *Name, 1971 QualType Canon) { 1972 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1973 1974 if (Canon.isNull()) { 1975 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1976 ElaboratedTypeKeyword CanonKeyword = Keyword; 1977 if (Keyword == ETK_None) 1978 CanonKeyword = ETK_Typename; 1979 1980 if (CanonNNS != NNS || CanonKeyword != Keyword) 1981 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 1982 } 1983 1984 llvm::FoldingSetNodeID ID; 1985 DependentNameType::Profile(ID, Keyword, NNS, Name); 1986 1987 void *InsertPos = 0; 1988 DependentNameType *T 1989 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1990 if (T) 1991 return QualType(T, 0); 1992 1993 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 1994 Types.push_back(T); 1995 DependentNameTypes.InsertNode(T, InsertPos); 1996 return QualType(T, 0); 1997} 1998 1999QualType 2000ASTContext::getDependentTemplateSpecializationType( 2001 ElaboratedTypeKeyword Keyword, 2002 NestedNameSpecifier *NNS, 2003 const IdentifierInfo *Name, 2004 const TemplateArgumentListInfo &Args) { 2005 // TODO: avoid this copy 2006 llvm::SmallVector<TemplateArgument, 16> ArgCopy; 2007 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2008 ArgCopy.push_back(Args[I].getArgument()); 2009 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2010 ArgCopy.size(), 2011 ArgCopy.data()); 2012} 2013 2014QualType 2015ASTContext::getDependentTemplateSpecializationType( 2016 ElaboratedTypeKeyword Keyword, 2017 NestedNameSpecifier *NNS, 2018 const IdentifierInfo *Name, 2019 unsigned NumArgs, 2020 const TemplateArgument *Args) { 2021 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2022 2023 llvm::FoldingSetNodeID ID; 2024 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2025 Name, NumArgs, Args); 2026 2027 void *InsertPos = 0; 2028 DependentTemplateSpecializationType *T 2029 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2030 if (T) 2031 return QualType(T, 0); 2032 2033 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2034 2035 ElaboratedTypeKeyword CanonKeyword = Keyword; 2036 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2037 2038 bool AnyNonCanonArgs = false; 2039 llvm::SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2040 for (unsigned I = 0; I != NumArgs; ++I) { 2041 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2042 if (!CanonArgs[I].structurallyEquals(Args[I])) 2043 AnyNonCanonArgs = true; 2044 } 2045 2046 QualType Canon; 2047 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2048 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2049 Name, NumArgs, 2050 CanonArgs.data()); 2051 2052 // Find the insert position again. 2053 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2054 } 2055 2056 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2057 sizeof(TemplateArgument) * NumArgs), 2058 TypeAlignment); 2059 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2060 Name, NumArgs, Args, Canon); 2061 Types.push_back(T); 2062 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2063 return QualType(T, 0); 2064} 2065 2066/// CmpProtocolNames - Comparison predicate for sorting protocols 2067/// alphabetically. 2068static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2069 const ObjCProtocolDecl *RHS) { 2070 return LHS->getDeclName() < RHS->getDeclName(); 2071} 2072 2073static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2074 unsigned NumProtocols) { 2075 if (NumProtocols == 0) return true; 2076 2077 for (unsigned i = 1; i != NumProtocols; ++i) 2078 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2079 return false; 2080 return true; 2081} 2082 2083static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2084 unsigned &NumProtocols) { 2085 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2086 2087 // Sort protocols, keyed by name. 2088 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2089 2090 // Remove duplicates. 2091 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2092 NumProtocols = ProtocolsEnd-Protocols; 2093} 2094 2095QualType ASTContext::getObjCObjectType(QualType BaseType, 2096 ObjCProtocolDecl * const *Protocols, 2097 unsigned NumProtocols) { 2098 // If the base type is an interface and there aren't any protocols 2099 // to add, then the interface type will do just fine. 2100 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2101 return BaseType; 2102 2103 // Look in the folding set for an existing type. 2104 llvm::FoldingSetNodeID ID; 2105 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2106 void *InsertPos = 0; 2107 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2108 return QualType(QT, 0); 2109 2110 // Build the canonical type, which has the canonical base type and 2111 // a sorted-and-uniqued list of protocols. 2112 QualType Canonical; 2113 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2114 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2115 if (!ProtocolsSorted) { 2116 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2117 Protocols + NumProtocols); 2118 unsigned UniqueCount = NumProtocols; 2119 2120 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2121 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2122 &Sorted[0], UniqueCount); 2123 } else { 2124 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2125 Protocols, NumProtocols); 2126 } 2127 2128 // Regenerate InsertPos. 2129 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2130 } 2131 2132 unsigned Size = sizeof(ObjCObjectTypeImpl); 2133 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2134 void *Mem = Allocate(Size, TypeAlignment); 2135 ObjCObjectTypeImpl *T = 2136 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2137 2138 Types.push_back(T); 2139 ObjCObjectTypes.InsertNode(T, InsertPos); 2140 return QualType(T, 0); 2141} 2142 2143/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2144/// the given object type. 2145QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) { 2146 llvm::FoldingSetNodeID ID; 2147 ObjCObjectPointerType::Profile(ID, ObjectT); 2148 2149 void *InsertPos = 0; 2150 if (ObjCObjectPointerType *QT = 2151 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2152 return QualType(QT, 0); 2153 2154 // Find the canonical object type. 2155 QualType Canonical; 2156 if (!ObjectT.isCanonical()) { 2157 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2158 2159 // Regenerate InsertPos. 2160 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2161 } 2162 2163 // No match. 2164 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2165 ObjCObjectPointerType *QType = 2166 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2167 2168 Types.push_back(QType); 2169 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2170 return QualType(QType, 0); 2171} 2172 2173/// getObjCInterfaceType - Return the unique reference to the type for the 2174/// specified ObjC interface decl. The list of protocols is optional. 2175QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) { 2176 if (Decl->TypeForDecl) 2177 return QualType(Decl->TypeForDecl, 0); 2178 2179 // FIXME: redeclarations? 2180 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2181 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2182 Decl->TypeForDecl = T; 2183 Types.push_back(T); 2184 return QualType(T, 0); 2185} 2186 2187/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2188/// TypeOfExprType AST's (since expression's are never shared). For example, 2189/// multiple declarations that refer to "typeof(x)" all contain different 2190/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2191/// on canonical type's (which are always unique). 2192QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2193 TypeOfExprType *toe; 2194 if (tofExpr->isTypeDependent()) { 2195 llvm::FoldingSetNodeID ID; 2196 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2197 2198 void *InsertPos = 0; 2199 DependentTypeOfExprType *Canon 2200 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2201 if (Canon) { 2202 // We already have a "canonical" version of an identical, dependent 2203 // typeof(expr) type. Use that as our canonical type. 2204 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2205 QualType((TypeOfExprType*)Canon, 0)); 2206 } 2207 else { 2208 // Build a new, canonical typeof(expr) type. 2209 Canon 2210 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2211 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2212 toe = Canon; 2213 } 2214 } else { 2215 QualType Canonical = getCanonicalType(tofExpr->getType()); 2216 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2217 } 2218 Types.push_back(toe); 2219 return QualType(toe, 0); 2220} 2221 2222/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2223/// TypeOfType AST's. The only motivation to unique these nodes would be 2224/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2225/// an issue. This doesn't effect the type checker, since it operates 2226/// on canonical type's (which are always unique). 2227QualType ASTContext::getTypeOfType(QualType tofType) { 2228 QualType Canonical = getCanonicalType(tofType); 2229 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2230 Types.push_back(tot); 2231 return QualType(tot, 0); 2232} 2233 2234/// getDecltypeForExpr - Given an expr, will return the decltype for that 2235/// expression, according to the rules in C++0x [dcl.type.simple]p4 2236static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2237 if (e->isTypeDependent()) 2238 return Context.DependentTy; 2239 2240 // If e is an id expression or a class member access, decltype(e) is defined 2241 // as the type of the entity named by e. 2242 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2243 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2244 return VD->getType(); 2245 } 2246 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2247 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2248 return FD->getType(); 2249 } 2250 // If e is a function call or an invocation of an overloaded operator, 2251 // (parentheses around e are ignored), decltype(e) is defined as the 2252 // return type of that function. 2253 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2254 return CE->getCallReturnType(); 2255 2256 QualType T = e->getType(); 2257 2258 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2259 // defined as T&, otherwise decltype(e) is defined as T. 2260 if (e->isLvalue(Context) == Expr::LV_Valid) 2261 T = Context.getLValueReferenceType(T); 2262 2263 return T; 2264} 2265 2266/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2267/// DecltypeType AST's. The only motivation to unique these nodes would be 2268/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2269/// an issue. This doesn't effect the type checker, since it operates 2270/// on canonical type's (which are always unique). 2271QualType ASTContext::getDecltypeType(Expr *e) { 2272 DecltypeType *dt; 2273 if (e->isTypeDependent()) { 2274 llvm::FoldingSetNodeID ID; 2275 DependentDecltypeType::Profile(ID, *this, e); 2276 2277 void *InsertPos = 0; 2278 DependentDecltypeType *Canon 2279 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2280 if (Canon) { 2281 // We already have a "canonical" version of an equivalent, dependent 2282 // decltype type. Use that as our canonical type. 2283 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2284 QualType((DecltypeType*)Canon, 0)); 2285 } 2286 else { 2287 // Build a new, canonical typeof(expr) type. 2288 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2289 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2290 dt = Canon; 2291 } 2292 } else { 2293 QualType T = getDecltypeForExpr(e, *this); 2294 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2295 } 2296 Types.push_back(dt); 2297 return QualType(dt, 0); 2298} 2299 2300/// getTagDeclType - Return the unique reference to the type for the 2301/// specified TagDecl (struct/union/class/enum) decl. 2302QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2303 assert (Decl); 2304 // FIXME: What is the design on getTagDeclType when it requires casting 2305 // away const? mutable? 2306 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2307} 2308 2309/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2310/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2311/// needs to agree with the definition in <stddef.h>. 2312CanQualType ASTContext::getSizeType() const { 2313 return getFromTargetType(Target.getSizeType()); 2314} 2315 2316/// getSignedWCharType - Return the type of "signed wchar_t". 2317/// Used when in C++, as a GCC extension. 2318QualType ASTContext::getSignedWCharType() const { 2319 // FIXME: derive from "Target" ? 2320 return WCharTy; 2321} 2322 2323/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2324/// Used when in C++, as a GCC extension. 2325QualType ASTContext::getUnsignedWCharType() const { 2326 // FIXME: derive from "Target" ? 2327 return UnsignedIntTy; 2328} 2329 2330/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2331/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2332QualType ASTContext::getPointerDiffType() const { 2333 return getFromTargetType(Target.getPtrDiffType(0)); 2334} 2335 2336//===----------------------------------------------------------------------===// 2337// Type Operators 2338//===----------------------------------------------------------------------===// 2339 2340CanQualType ASTContext::getCanonicalParamType(QualType T) { 2341 // Push qualifiers into arrays, and then discard any remaining 2342 // qualifiers. 2343 T = getCanonicalType(T); 2344 const Type *Ty = T.getTypePtr(); 2345 2346 QualType Result; 2347 if (isa<ArrayType>(Ty)) { 2348 Result = getArrayDecayedType(QualType(Ty,0)); 2349 } else if (isa<FunctionType>(Ty)) { 2350 Result = getPointerType(QualType(Ty, 0)); 2351 } else { 2352 Result = QualType(Ty, 0); 2353 } 2354 2355 return CanQualType::CreateUnsafe(Result); 2356} 2357 2358/// getCanonicalType - Return the canonical (structural) type corresponding to 2359/// the specified potentially non-canonical type. The non-canonical version 2360/// of a type may have many "decorated" versions of types. Decorators can 2361/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2362/// to be free of any of these, allowing two canonical types to be compared 2363/// for exact equality with a simple pointer comparison. 2364CanQualType ASTContext::getCanonicalType(QualType T) { 2365 QualifierCollector Quals; 2366 const Type *Ptr = Quals.strip(T); 2367 QualType CanType = Ptr->getCanonicalTypeInternal(); 2368 2369 // The canonical internal type will be the canonical type *except* 2370 // that we push type qualifiers down through array types. 2371 2372 // If there are no new qualifiers to push down, stop here. 2373 if (!Quals.hasQualifiers()) 2374 return CanQualType::CreateUnsafe(CanType); 2375 2376 // If the type qualifiers are on an array type, get the canonical 2377 // type of the array with the qualifiers applied to the element 2378 // type. 2379 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2380 if (!AT) 2381 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2382 2383 // Get the canonical version of the element with the extra qualifiers on it. 2384 // This can recursively sink qualifiers through multiple levels of arrays. 2385 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2386 NewEltTy = getCanonicalType(NewEltTy); 2387 2388 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2389 return CanQualType::CreateUnsafe( 2390 getConstantArrayType(NewEltTy, CAT->getSize(), 2391 CAT->getSizeModifier(), 2392 CAT->getIndexTypeCVRQualifiers())); 2393 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2394 return CanQualType::CreateUnsafe( 2395 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2396 IAT->getIndexTypeCVRQualifiers())); 2397 2398 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2399 return CanQualType::CreateUnsafe( 2400 getDependentSizedArrayType(NewEltTy, 2401 DSAT->getSizeExpr() ? 2402 DSAT->getSizeExpr()->Retain() : 0, 2403 DSAT->getSizeModifier(), 2404 DSAT->getIndexTypeCVRQualifiers(), 2405 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2406 2407 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2408 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2409 VAT->getSizeExpr() ? 2410 VAT->getSizeExpr()->Retain() : 0, 2411 VAT->getSizeModifier(), 2412 VAT->getIndexTypeCVRQualifiers(), 2413 VAT->getBracketsRange())); 2414} 2415 2416QualType ASTContext::getUnqualifiedArrayType(QualType T, 2417 Qualifiers &Quals) { 2418 Quals = T.getQualifiers(); 2419 const ArrayType *AT = getAsArrayType(T); 2420 if (!AT) { 2421 return T.getUnqualifiedType(); 2422 } 2423 2424 QualType Elt = AT->getElementType(); 2425 QualType UnqualElt = getUnqualifiedArrayType(Elt, Quals); 2426 if (Elt == UnqualElt) 2427 return T; 2428 2429 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 2430 return getConstantArrayType(UnqualElt, CAT->getSize(), 2431 CAT->getSizeModifier(), 0); 2432 } 2433 2434 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 2435 return getIncompleteArrayType(UnqualElt, IAT->getSizeModifier(), 0); 2436 } 2437 2438 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 2439 return getVariableArrayType(UnqualElt, 2440 VAT->getSizeExpr() ? 2441 VAT->getSizeExpr()->Retain() : 0, 2442 VAT->getSizeModifier(), 2443 VAT->getIndexTypeCVRQualifiers(), 2444 VAT->getBracketsRange()); 2445 } 2446 2447 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 2448 return getDependentSizedArrayType(UnqualElt, DSAT->getSizeExpr()->Retain(), 2449 DSAT->getSizeModifier(), 0, 2450 SourceRange()); 2451} 2452 2453/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 2454/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 2455/// they point to and return true. If T1 and T2 aren't pointer types 2456/// or pointer-to-member types, or if they are not similar at this 2457/// level, returns false and leaves T1 and T2 unchanged. Top-level 2458/// qualifiers on T1 and T2 are ignored. This function will typically 2459/// be called in a loop that successively "unwraps" pointer and 2460/// pointer-to-member types to compare them at each level. 2461bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 2462 const PointerType *T1PtrType = T1->getAs<PointerType>(), 2463 *T2PtrType = T2->getAs<PointerType>(); 2464 if (T1PtrType && T2PtrType) { 2465 T1 = T1PtrType->getPointeeType(); 2466 T2 = T2PtrType->getPointeeType(); 2467 return true; 2468 } 2469 2470 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 2471 *T2MPType = T2->getAs<MemberPointerType>(); 2472 if (T1MPType && T2MPType && 2473 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 2474 QualType(T2MPType->getClass(), 0))) { 2475 T1 = T1MPType->getPointeeType(); 2476 T2 = T2MPType->getPointeeType(); 2477 return true; 2478 } 2479 2480 if (getLangOptions().ObjC1) { 2481 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 2482 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 2483 if (T1OPType && T2OPType) { 2484 T1 = T1OPType->getPointeeType(); 2485 T2 = T2OPType->getPointeeType(); 2486 return true; 2487 } 2488 } 2489 2490 // FIXME: Block pointers, too? 2491 2492 return false; 2493} 2494 2495DeclarationName ASTContext::getNameForTemplate(TemplateName Name) { 2496 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2497 return TD->getDeclName(); 2498 2499 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2500 if (DTN->isIdentifier()) { 2501 return DeclarationNames.getIdentifier(DTN->getIdentifier()); 2502 } else { 2503 return DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2504 } 2505 } 2506 2507 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2508 assert(Storage); 2509 return (*Storage->begin())->getDeclName(); 2510} 2511 2512TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2513 if (TemplateDecl *Template = Name.getAsTemplateDecl()) { 2514 if (TemplateTemplateParmDecl *TTP 2515 = dyn_cast<TemplateTemplateParmDecl>(Template)) 2516 Template = getCanonicalTemplateTemplateParmDecl(TTP); 2517 2518 // The canonical template name is the canonical template declaration. 2519 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2520 } 2521 2522 assert(!Name.getAsOverloadedTemplate()); 2523 2524 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2525 assert(DTN && "Non-dependent template names must refer to template decls."); 2526 return DTN->CanonicalTemplateName; 2527} 2528 2529bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2530 X = getCanonicalTemplateName(X); 2531 Y = getCanonicalTemplateName(Y); 2532 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2533} 2534 2535TemplateArgument 2536ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2537 switch (Arg.getKind()) { 2538 case TemplateArgument::Null: 2539 return Arg; 2540 2541 case TemplateArgument::Expression: 2542 return Arg; 2543 2544 case TemplateArgument::Declaration: 2545 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2546 2547 case TemplateArgument::Template: 2548 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2549 2550 case TemplateArgument::Integral: 2551 return TemplateArgument(*Arg.getAsIntegral(), 2552 getCanonicalType(Arg.getIntegralType())); 2553 2554 case TemplateArgument::Type: 2555 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2556 2557 case TemplateArgument::Pack: { 2558 // FIXME: Allocate in ASTContext 2559 TemplateArgument *CanonArgs = new TemplateArgument[Arg.pack_size()]; 2560 unsigned Idx = 0; 2561 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2562 AEnd = Arg.pack_end(); 2563 A != AEnd; (void)++A, ++Idx) 2564 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2565 2566 TemplateArgument Result; 2567 Result.setArgumentPack(CanonArgs, Arg.pack_size(), false); 2568 return Result; 2569 } 2570 } 2571 2572 // Silence GCC warning 2573 assert(false && "Unhandled template argument kind"); 2574 return TemplateArgument(); 2575} 2576 2577NestedNameSpecifier * 2578ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2579 if (!NNS) 2580 return 0; 2581 2582 switch (NNS->getKind()) { 2583 case NestedNameSpecifier::Identifier: 2584 // Canonicalize the prefix but keep the identifier the same. 2585 return NestedNameSpecifier::Create(*this, 2586 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2587 NNS->getAsIdentifier()); 2588 2589 case NestedNameSpecifier::Namespace: 2590 // A namespace is canonical; build a nested-name-specifier with 2591 // this namespace and no prefix. 2592 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2593 2594 case NestedNameSpecifier::TypeSpec: 2595 case NestedNameSpecifier::TypeSpecWithTemplate: { 2596 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2597 return NestedNameSpecifier::Create(*this, 0, 2598 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2599 T.getTypePtr()); 2600 } 2601 2602 case NestedNameSpecifier::Global: 2603 // The global specifier is canonical and unique. 2604 return NNS; 2605 } 2606 2607 // Required to silence a GCC warning 2608 return 0; 2609} 2610 2611 2612const ArrayType *ASTContext::getAsArrayType(QualType T) { 2613 // Handle the non-qualified case efficiently. 2614 if (!T.hasLocalQualifiers()) { 2615 // Handle the common positive case fast. 2616 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2617 return AT; 2618 } 2619 2620 // Handle the common negative case fast. 2621 QualType CType = T->getCanonicalTypeInternal(); 2622 if (!isa<ArrayType>(CType)) 2623 return 0; 2624 2625 // Apply any qualifiers from the array type to the element type. This 2626 // implements C99 6.7.3p8: "If the specification of an array type includes 2627 // any type qualifiers, the element type is so qualified, not the array type." 2628 2629 // If we get here, we either have type qualifiers on the type, or we have 2630 // sugar such as a typedef in the way. If we have type qualifiers on the type 2631 // we must propagate them down into the element type. 2632 2633 QualifierCollector Qs; 2634 const Type *Ty = Qs.strip(T.getDesugaredType()); 2635 2636 // If we have a simple case, just return now. 2637 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2638 if (ATy == 0 || Qs.empty()) 2639 return ATy; 2640 2641 // Otherwise, we have an array and we have qualifiers on it. Push the 2642 // qualifiers into the array element type and return a new array type. 2643 // Get the canonical version of the element with the extra qualifiers on it. 2644 // This can recursively sink qualifiers through multiple levels of arrays. 2645 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2646 2647 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2648 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2649 CAT->getSizeModifier(), 2650 CAT->getIndexTypeCVRQualifiers())); 2651 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2652 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2653 IAT->getSizeModifier(), 2654 IAT->getIndexTypeCVRQualifiers())); 2655 2656 if (const DependentSizedArrayType *DSAT 2657 = dyn_cast<DependentSizedArrayType>(ATy)) 2658 return cast<ArrayType>( 2659 getDependentSizedArrayType(NewEltTy, 2660 DSAT->getSizeExpr() ? 2661 DSAT->getSizeExpr()->Retain() : 0, 2662 DSAT->getSizeModifier(), 2663 DSAT->getIndexTypeCVRQualifiers(), 2664 DSAT->getBracketsRange())); 2665 2666 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2667 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2668 VAT->getSizeExpr() ? 2669 VAT->getSizeExpr()->Retain() : 0, 2670 VAT->getSizeModifier(), 2671 VAT->getIndexTypeCVRQualifiers(), 2672 VAT->getBracketsRange())); 2673} 2674 2675 2676/// getArrayDecayedType - Return the properly qualified result of decaying the 2677/// specified array type to a pointer. This operation is non-trivial when 2678/// handling typedefs etc. The canonical type of "T" must be an array type, 2679/// this returns a pointer to a properly qualified element of the array. 2680/// 2681/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2682QualType ASTContext::getArrayDecayedType(QualType Ty) { 2683 // Get the element type with 'getAsArrayType' so that we don't lose any 2684 // typedefs in the element type of the array. This also handles propagation 2685 // of type qualifiers from the array type into the element type if present 2686 // (C99 6.7.3p8). 2687 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2688 assert(PrettyArrayType && "Not an array type!"); 2689 2690 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2691 2692 // int x[restrict 4] -> int *restrict 2693 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2694} 2695 2696QualType ASTContext::getBaseElementType(QualType QT) { 2697 QualifierCollector Qs; 2698 while (const ArrayType *AT = getAsArrayType(QualType(Qs.strip(QT), 0))) 2699 QT = AT->getElementType(); 2700 return Qs.apply(QT); 2701} 2702 2703QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2704 QualType ElemTy = AT->getElementType(); 2705 2706 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2707 return getBaseElementType(AT); 2708 2709 return ElemTy; 2710} 2711 2712/// getConstantArrayElementCount - Returns number of constant array elements. 2713uint64_t 2714ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2715 uint64_t ElementCount = 1; 2716 do { 2717 ElementCount *= CA->getSize().getZExtValue(); 2718 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2719 } while (CA); 2720 return ElementCount; 2721} 2722 2723/// getFloatingRank - Return a relative rank for floating point types. 2724/// This routine will assert if passed a built-in type that isn't a float. 2725static FloatingRank getFloatingRank(QualType T) { 2726 if (const ComplexType *CT = T->getAs<ComplexType>()) 2727 return getFloatingRank(CT->getElementType()); 2728 2729 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2730 switch (T->getAs<BuiltinType>()->getKind()) { 2731 default: assert(0 && "getFloatingRank(): not a floating type"); 2732 case BuiltinType::Float: return FloatRank; 2733 case BuiltinType::Double: return DoubleRank; 2734 case BuiltinType::LongDouble: return LongDoubleRank; 2735 } 2736} 2737 2738/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2739/// point or a complex type (based on typeDomain/typeSize). 2740/// 'typeDomain' is a real floating point or complex type. 2741/// 'typeSize' is a real floating point or complex type. 2742QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2743 QualType Domain) const { 2744 FloatingRank EltRank = getFloatingRank(Size); 2745 if (Domain->isComplexType()) { 2746 switch (EltRank) { 2747 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2748 case FloatRank: return FloatComplexTy; 2749 case DoubleRank: return DoubleComplexTy; 2750 case LongDoubleRank: return LongDoubleComplexTy; 2751 } 2752 } 2753 2754 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2755 switch (EltRank) { 2756 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2757 case FloatRank: return FloatTy; 2758 case DoubleRank: return DoubleTy; 2759 case LongDoubleRank: return LongDoubleTy; 2760 } 2761} 2762 2763/// getFloatingTypeOrder - Compare the rank of the two specified floating 2764/// point types, ignoring the domain of the type (i.e. 'double' == 2765/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2766/// LHS < RHS, return -1. 2767int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2768 FloatingRank LHSR = getFloatingRank(LHS); 2769 FloatingRank RHSR = getFloatingRank(RHS); 2770 2771 if (LHSR == RHSR) 2772 return 0; 2773 if (LHSR > RHSR) 2774 return 1; 2775 return -1; 2776} 2777 2778/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2779/// routine will assert if passed a built-in type that isn't an integer or enum, 2780/// or if it is not canonicalized. 2781unsigned ASTContext::getIntegerRank(Type *T) { 2782 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2783 if (EnumType* ET = dyn_cast<EnumType>(T)) 2784 T = ET->getDecl()->getPromotionType().getTypePtr(); 2785 2786 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2787 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2788 2789 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2790 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2791 2792 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2793 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2794 2795 switch (cast<BuiltinType>(T)->getKind()) { 2796 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2797 case BuiltinType::Bool: 2798 return 1 + (getIntWidth(BoolTy) << 3); 2799 case BuiltinType::Char_S: 2800 case BuiltinType::Char_U: 2801 case BuiltinType::SChar: 2802 case BuiltinType::UChar: 2803 return 2 + (getIntWidth(CharTy) << 3); 2804 case BuiltinType::Short: 2805 case BuiltinType::UShort: 2806 return 3 + (getIntWidth(ShortTy) << 3); 2807 case BuiltinType::Int: 2808 case BuiltinType::UInt: 2809 return 4 + (getIntWidth(IntTy) << 3); 2810 case BuiltinType::Long: 2811 case BuiltinType::ULong: 2812 return 5 + (getIntWidth(LongTy) << 3); 2813 case BuiltinType::LongLong: 2814 case BuiltinType::ULongLong: 2815 return 6 + (getIntWidth(LongLongTy) << 3); 2816 case BuiltinType::Int128: 2817 case BuiltinType::UInt128: 2818 return 7 + (getIntWidth(Int128Ty) << 3); 2819 } 2820} 2821 2822/// \brief Whether this is a promotable bitfield reference according 2823/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 2824/// 2825/// \returns the type this bit-field will promote to, or NULL if no 2826/// promotion occurs. 2827QualType ASTContext::isPromotableBitField(Expr *E) { 2828 if (E->isTypeDependent() || E->isValueDependent()) 2829 return QualType(); 2830 2831 FieldDecl *Field = E->getBitField(); 2832 if (!Field) 2833 return QualType(); 2834 2835 QualType FT = Field->getType(); 2836 2837 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 2838 uint64_t BitWidth = BitWidthAP.getZExtValue(); 2839 uint64_t IntSize = getTypeSize(IntTy); 2840 // GCC extension compatibility: if the bit-field size is less than or equal 2841 // to the size of int, it gets promoted no matter what its type is. 2842 // For instance, unsigned long bf : 4 gets promoted to signed int. 2843 if (BitWidth < IntSize) 2844 return IntTy; 2845 2846 if (BitWidth == IntSize) 2847 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 2848 2849 // Types bigger than int are not subject to promotions, and therefore act 2850 // like the base type. 2851 // FIXME: This doesn't quite match what gcc does, but what gcc does here 2852 // is ridiculous. 2853 return QualType(); 2854} 2855 2856/// getPromotedIntegerType - Returns the type that Promotable will 2857/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 2858/// integer type. 2859QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 2860 assert(!Promotable.isNull()); 2861 assert(Promotable->isPromotableIntegerType()); 2862 if (const EnumType *ET = Promotable->getAs<EnumType>()) 2863 return ET->getDecl()->getPromotionType(); 2864 if (Promotable->isSignedIntegerType()) 2865 return IntTy; 2866 uint64_t PromotableSize = getTypeSize(Promotable); 2867 uint64_t IntSize = getTypeSize(IntTy); 2868 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 2869 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 2870} 2871 2872/// getIntegerTypeOrder - Returns the highest ranked integer type: 2873/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2874/// LHS < RHS, return -1. 2875int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2876 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2877 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2878 if (LHSC == RHSC) return 0; 2879 2880 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2881 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2882 2883 unsigned LHSRank = getIntegerRank(LHSC); 2884 unsigned RHSRank = getIntegerRank(RHSC); 2885 2886 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2887 if (LHSRank == RHSRank) return 0; 2888 return LHSRank > RHSRank ? 1 : -1; 2889 } 2890 2891 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2892 if (LHSUnsigned) { 2893 // If the unsigned [LHS] type is larger, return it. 2894 if (LHSRank >= RHSRank) 2895 return 1; 2896 2897 // If the signed type can represent all values of the unsigned type, it 2898 // wins. Because we are dealing with 2's complement and types that are 2899 // powers of two larger than each other, this is always safe. 2900 return -1; 2901 } 2902 2903 // If the unsigned [RHS] type is larger, return it. 2904 if (RHSRank >= LHSRank) 2905 return -1; 2906 2907 // If the signed type can represent all values of the unsigned type, it 2908 // wins. Because we are dealing with 2's complement and types that are 2909 // powers of two larger than each other, this is always safe. 2910 return 1; 2911} 2912 2913static RecordDecl * 2914CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 2915 SourceLocation L, IdentifierInfo *Id) { 2916 if (Ctx.getLangOptions().CPlusPlus) 2917 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 2918 else 2919 return RecordDecl::Create(Ctx, TK, DC, L, Id); 2920} 2921 2922// getCFConstantStringType - Return the type used for constant CFStrings. 2923QualType ASTContext::getCFConstantStringType() { 2924 if (!CFConstantStringTypeDecl) { 2925 CFConstantStringTypeDecl = 2926 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2927 &Idents.get("NSConstantString")); 2928 CFConstantStringTypeDecl->startDefinition(); 2929 2930 QualType FieldTypes[4]; 2931 2932 // const int *isa; 2933 FieldTypes[0] = getPointerType(IntTy.withConst()); 2934 // int flags; 2935 FieldTypes[1] = IntTy; 2936 // const char *str; 2937 FieldTypes[2] = getPointerType(CharTy.withConst()); 2938 // long length; 2939 FieldTypes[3] = LongTy; 2940 2941 // Create fields 2942 for (unsigned i = 0; i < 4; ++i) { 2943 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2944 SourceLocation(), 0, 2945 FieldTypes[i], /*TInfo=*/0, 2946 /*BitWidth=*/0, 2947 /*Mutable=*/false); 2948 Field->setAccess(AS_public); 2949 CFConstantStringTypeDecl->addDecl(Field); 2950 } 2951 2952 CFConstantStringTypeDecl->completeDefinition(); 2953 } 2954 2955 return getTagDeclType(CFConstantStringTypeDecl); 2956} 2957 2958void ASTContext::setCFConstantStringType(QualType T) { 2959 const RecordType *Rec = T->getAs<RecordType>(); 2960 assert(Rec && "Invalid CFConstantStringType"); 2961 CFConstantStringTypeDecl = Rec->getDecl(); 2962} 2963 2964// getNSConstantStringType - Return the type used for constant NSStrings. 2965QualType ASTContext::getNSConstantStringType() { 2966 if (!NSConstantStringTypeDecl) { 2967 NSConstantStringTypeDecl = 2968 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2969 &Idents.get("__builtin_NSString")); 2970 NSConstantStringTypeDecl->startDefinition(); 2971 2972 QualType FieldTypes[3]; 2973 2974 // const int *isa; 2975 FieldTypes[0] = getPointerType(IntTy.withConst()); 2976 // const char *str; 2977 FieldTypes[1] = getPointerType(CharTy.withConst()); 2978 // unsigned int length; 2979 FieldTypes[2] = UnsignedIntTy; 2980 2981 // Create fields 2982 for (unsigned i = 0; i < 3; ++i) { 2983 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 2984 SourceLocation(), 0, 2985 FieldTypes[i], /*TInfo=*/0, 2986 /*BitWidth=*/0, 2987 /*Mutable=*/false); 2988 Field->setAccess(AS_public); 2989 NSConstantStringTypeDecl->addDecl(Field); 2990 } 2991 2992 NSConstantStringTypeDecl->completeDefinition(); 2993 } 2994 2995 return getTagDeclType(NSConstantStringTypeDecl); 2996} 2997 2998void ASTContext::setNSConstantStringType(QualType T) { 2999 const RecordType *Rec = T->getAs<RecordType>(); 3000 assert(Rec && "Invalid NSConstantStringType"); 3001 NSConstantStringTypeDecl = Rec->getDecl(); 3002} 3003 3004QualType ASTContext::getObjCFastEnumerationStateType() { 3005 if (!ObjCFastEnumerationStateTypeDecl) { 3006 ObjCFastEnumerationStateTypeDecl = 3007 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3008 &Idents.get("__objcFastEnumerationState")); 3009 ObjCFastEnumerationStateTypeDecl->startDefinition(); 3010 3011 QualType FieldTypes[] = { 3012 UnsignedLongTy, 3013 getPointerType(ObjCIdTypedefType), 3014 getPointerType(UnsignedLongTy), 3015 getConstantArrayType(UnsignedLongTy, 3016 llvm::APInt(32, 5), ArrayType::Normal, 0) 3017 }; 3018 3019 for (size_t i = 0; i < 4; ++i) { 3020 FieldDecl *Field = FieldDecl::Create(*this, 3021 ObjCFastEnumerationStateTypeDecl, 3022 SourceLocation(), 0, 3023 FieldTypes[i], /*TInfo=*/0, 3024 /*BitWidth=*/0, 3025 /*Mutable=*/false); 3026 Field->setAccess(AS_public); 3027 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 3028 } 3029 if (getLangOptions().CPlusPlus) 3030 if (CXXRecordDecl *CXXRD = 3031 dyn_cast<CXXRecordDecl>(ObjCFastEnumerationStateTypeDecl)) 3032 CXXRD->setEmpty(false); 3033 3034 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 3035 } 3036 3037 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 3038} 3039 3040QualType ASTContext::getBlockDescriptorType() { 3041 if (BlockDescriptorType) 3042 return getTagDeclType(BlockDescriptorType); 3043 3044 RecordDecl *T; 3045 // FIXME: Needs the FlagAppleBlock bit. 3046 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3047 &Idents.get("__block_descriptor")); 3048 T->startDefinition(); 3049 3050 QualType FieldTypes[] = { 3051 UnsignedLongTy, 3052 UnsignedLongTy, 3053 }; 3054 3055 const char *FieldNames[] = { 3056 "reserved", 3057 "Size" 3058 }; 3059 3060 for (size_t i = 0; i < 2; ++i) { 3061 FieldDecl *Field = FieldDecl::Create(*this, 3062 T, 3063 SourceLocation(), 3064 &Idents.get(FieldNames[i]), 3065 FieldTypes[i], /*TInfo=*/0, 3066 /*BitWidth=*/0, 3067 /*Mutable=*/false); 3068 Field->setAccess(AS_public); 3069 T->addDecl(Field); 3070 } 3071 3072 T->completeDefinition(); 3073 3074 BlockDescriptorType = T; 3075 3076 return getTagDeclType(BlockDescriptorType); 3077} 3078 3079void ASTContext::setBlockDescriptorType(QualType T) { 3080 const RecordType *Rec = T->getAs<RecordType>(); 3081 assert(Rec && "Invalid BlockDescriptorType"); 3082 BlockDescriptorType = Rec->getDecl(); 3083} 3084 3085QualType ASTContext::getBlockDescriptorExtendedType() { 3086 if (BlockDescriptorExtendedType) 3087 return getTagDeclType(BlockDescriptorExtendedType); 3088 3089 RecordDecl *T; 3090 // FIXME: Needs the FlagAppleBlock bit. 3091 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3092 &Idents.get("__block_descriptor_withcopydispose")); 3093 T->startDefinition(); 3094 3095 QualType FieldTypes[] = { 3096 UnsignedLongTy, 3097 UnsignedLongTy, 3098 getPointerType(VoidPtrTy), 3099 getPointerType(VoidPtrTy) 3100 }; 3101 3102 const char *FieldNames[] = { 3103 "reserved", 3104 "Size", 3105 "CopyFuncPtr", 3106 "DestroyFuncPtr" 3107 }; 3108 3109 for (size_t i = 0; i < 4; ++i) { 3110 FieldDecl *Field = FieldDecl::Create(*this, 3111 T, 3112 SourceLocation(), 3113 &Idents.get(FieldNames[i]), 3114 FieldTypes[i], /*TInfo=*/0, 3115 /*BitWidth=*/0, 3116 /*Mutable=*/false); 3117 Field->setAccess(AS_public); 3118 T->addDecl(Field); 3119 } 3120 3121 T->completeDefinition(); 3122 3123 BlockDescriptorExtendedType = T; 3124 3125 return getTagDeclType(BlockDescriptorExtendedType); 3126} 3127 3128void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3129 const RecordType *Rec = T->getAs<RecordType>(); 3130 assert(Rec && "Invalid BlockDescriptorType"); 3131 BlockDescriptorExtendedType = Rec->getDecl(); 3132} 3133 3134bool ASTContext::BlockRequiresCopying(QualType Ty) { 3135 if (Ty->isBlockPointerType()) 3136 return true; 3137 if (isObjCNSObjectType(Ty)) 3138 return true; 3139 if (Ty->isObjCObjectPointerType()) 3140 return true; 3141 return false; 3142} 3143 3144QualType ASTContext::BuildByRefType(const char *DeclName, QualType Ty) { 3145 // type = struct __Block_byref_1_X { 3146 // void *__isa; 3147 // struct __Block_byref_1_X *__forwarding; 3148 // unsigned int __flags; 3149 // unsigned int __size; 3150 // void *__copy_helper; // as needed 3151 // void *__destroy_help // as needed 3152 // int X; 3153 // } * 3154 3155 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3156 3157 // FIXME: Move up 3158 llvm::SmallString<36> Name; 3159 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3160 ++UniqueBlockByRefTypeID << '_' << DeclName; 3161 RecordDecl *T; 3162 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3163 &Idents.get(Name.str())); 3164 T->startDefinition(); 3165 QualType Int32Ty = IntTy; 3166 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3167 QualType FieldTypes[] = { 3168 getPointerType(VoidPtrTy), 3169 getPointerType(getTagDeclType(T)), 3170 Int32Ty, 3171 Int32Ty, 3172 getPointerType(VoidPtrTy), 3173 getPointerType(VoidPtrTy), 3174 Ty 3175 }; 3176 3177 const char *FieldNames[] = { 3178 "__isa", 3179 "__forwarding", 3180 "__flags", 3181 "__size", 3182 "__copy_helper", 3183 "__destroy_helper", 3184 DeclName, 3185 }; 3186 3187 for (size_t i = 0; i < 7; ++i) { 3188 if (!HasCopyAndDispose && i >=4 && i <= 5) 3189 continue; 3190 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3191 &Idents.get(FieldNames[i]), 3192 FieldTypes[i], /*TInfo=*/0, 3193 /*BitWidth=*/0, /*Mutable=*/false); 3194 Field->setAccess(AS_public); 3195 T->addDecl(Field); 3196 } 3197 3198 T->completeDefinition(); 3199 3200 return getPointerType(getTagDeclType(T)); 3201} 3202 3203 3204QualType ASTContext::getBlockParmType( 3205 bool BlockHasCopyDispose, 3206 llvm::SmallVectorImpl<const Expr *> &Layout) { 3207 3208 // FIXME: Move up 3209 llvm::SmallString<36> Name; 3210 llvm::raw_svector_ostream(Name) << "__block_literal_" 3211 << ++UniqueBlockParmTypeID; 3212 RecordDecl *T; 3213 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3214 &Idents.get(Name.str())); 3215 T->startDefinition(); 3216 QualType FieldTypes[] = { 3217 getPointerType(VoidPtrTy), 3218 IntTy, 3219 IntTy, 3220 getPointerType(VoidPtrTy), 3221 (BlockHasCopyDispose ? 3222 getPointerType(getBlockDescriptorExtendedType()) : 3223 getPointerType(getBlockDescriptorType())) 3224 }; 3225 3226 const char *FieldNames[] = { 3227 "__isa", 3228 "__flags", 3229 "__reserved", 3230 "__FuncPtr", 3231 "__descriptor" 3232 }; 3233 3234 for (size_t i = 0; i < 5; ++i) { 3235 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3236 &Idents.get(FieldNames[i]), 3237 FieldTypes[i], /*TInfo=*/0, 3238 /*BitWidth=*/0, /*Mutable=*/false); 3239 Field->setAccess(AS_public); 3240 T->addDecl(Field); 3241 } 3242 3243 for (unsigned i = 0; i < Layout.size(); ++i) { 3244 const Expr *E = Layout[i]; 3245 3246 QualType FieldType = E->getType(); 3247 IdentifierInfo *FieldName = 0; 3248 if (isa<CXXThisExpr>(E)) { 3249 FieldName = &Idents.get("this"); 3250 } else if (const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E)) { 3251 const ValueDecl *D = BDRE->getDecl(); 3252 FieldName = D->getIdentifier(); 3253 if (BDRE->isByRef()) 3254 FieldType = BuildByRefType(D->getNameAsCString(), FieldType); 3255 } else { 3256 // Padding. 3257 assert(isa<ConstantArrayType>(FieldType) && 3258 isa<DeclRefExpr>(E) && 3259 !cast<DeclRefExpr>(E)->getDecl()->getDeclName() && 3260 "doesn't match characteristics of padding decl"); 3261 } 3262 3263 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3264 FieldName, FieldType, /*TInfo=*/0, 3265 /*BitWidth=*/0, /*Mutable=*/false); 3266 Field->setAccess(AS_public); 3267 T->addDecl(Field); 3268 } 3269 3270 T->completeDefinition(); 3271 3272 return getPointerType(getTagDeclType(T)); 3273} 3274 3275void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3276 const RecordType *Rec = T->getAs<RecordType>(); 3277 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3278 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3279} 3280 3281// This returns true if a type has been typedefed to BOOL: 3282// typedef <type> BOOL; 3283static bool isTypeTypedefedAsBOOL(QualType T) { 3284 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3285 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3286 return II->isStr("BOOL"); 3287 3288 return false; 3289} 3290 3291/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3292/// purpose. 3293CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) { 3294 CharUnits sz = getTypeSizeInChars(type); 3295 3296 // Make all integer and enum types at least as large as an int 3297 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 3298 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3299 // Treat arrays as pointers, since that's how they're passed in. 3300 else if (type->isArrayType()) 3301 sz = getTypeSizeInChars(VoidPtrTy); 3302 return sz; 3303} 3304 3305static inline 3306std::string charUnitsToString(const CharUnits &CU) { 3307 return llvm::itostr(CU.getQuantity()); 3308} 3309 3310/// getObjCEncodingForBlockDecl - Return the encoded type for this block 3311/// declaration. 3312void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3313 std::string& S) { 3314 const BlockDecl *Decl = Expr->getBlockDecl(); 3315 QualType BlockTy = 3316 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3317 // Encode result type. 3318 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3319 // Compute size of all parameters. 3320 // Start with computing size of a pointer in number of bytes. 3321 // FIXME: There might(should) be a better way of doing this computation! 3322 SourceLocation Loc; 3323 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3324 CharUnits ParmOffset = PtrSize; 3325 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3326 E = Decl->param_end(); PI != E; ++PI) { 3327 QualType PType = (*PI)->getType(); 3328 CharUnits sz = getObjCEncodingTypeSize(PType); 3329 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3330 ParmOffset += sz; 3331 } 3332 // Size of the argument frame 3333 S += charUnitsToString(ParmOffset); 3334 // Block pointer and offset. 3335 S += "@?0"; 3336 ParmOffset = PtrSize; 3337 3338 // Argument types. 3339 ParmOffset = PtrSize; 3340 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3341 Decl->param_end(); PI != E; ++PI) { 3342 ParmVarDecl *PVDecl = *PI; 3343 QualType PType = PVDecl->getOriginalType(); 3344 if (const ArrayType *AT = 3345 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3346 // Use array's original type only if it has known number of 3347 // elements. 3348 if (!isa<ConstantArrayType>(AT)) 3349 PType = PVDecl->getType(); 3350 } else if (PType->isFunctionType()) 3351 PType = PVDecl->getType(); 3352 getObjCEncodingForType(PType, S); 3353 S += charUnitsToString(ParmOffset); 3354 ParmOffset += getObjCEncodingTypeSize(PType); 3355 } 3356} 3357 3358/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3359/// declaration. 3360void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3361 std::string& S) { 3362 // FIXME: This is not very efficient. 3363 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3364 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3365 // Encode result type. 3366 getObjCEncodingForType(Decl->getResultType(), S); 3367 // Compute size of all parameters. 3368 // Start with computing size of a pointer in number of bytes. 3369 // FIXME: There might(should) be a better way of doing this computation! 3370 SourceLocation Loc; 3371 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3372 // The first two arguments (self and _cmd) are pointers; account for 3373 // their size. 3374 CharUnits ParmOffset = 2 * PtrSize; 3375 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3376 E = Decl->sel_param_end(); PI != E; ++PI) { 3377 QualType PType = (*PI)->getType(); 3378 CharUnits sz = getObjCEncodingTypeSize(PType); 3379 assert (sz.isPositive() && 3380 "getObjCEncodingForMethodDecl - Incomplete param type"); 3381 ParmOffset += sz; 3382 } 3383 S += charUnitsToString(ParmOffset); 3384 S += "@0:"; 3385 S += charUnitsToString(PtrSize); 3386 3387 // Argument types. 3388 ParmOffset = 2 * PtrSize; 3389 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3390 E = Decl->sel_param_end(); PI != E; ++PI) { 3391 ParmVarDecl *PVDecl = *PI; 3392 QualType PType = PVDecl->getOriginalType(); 3393 if (const ArrayType *AT = 3394 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3395 // Use array's original type only if it has known number of 3396 // elements. 3397 if (!isa<ConstantArrayType>(AT)) 3398 PType = PVDecl->getType(); 3399 } else if (PType->isFunctionType()) 3400 PType = PVDecl->getType(); 3401 // Process argument qualifiers for user supplied arguments; such as, 3402 // 'in', 'inout', etc. 3403 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3404 getObjCEncodingForType(PType, S); 3405 S += charUnitsToString(ParmOffset); 3406 ParmOffset += getObjCEncodingTypeSize(PType); 3407 } 3408} 3409 3410/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3411/// property declaration. If non-NULL, Container must be either an 3412/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3413/// NULL when getting encodings for protocol properties. 3414/// Property attributes are stored as a comma-delimited C string. The simple 3415/// attributes readonly and bycopy are encoded as single characters. The 3416/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3417/// encoded as single characters, followed by an identifier. Property types 3418/// are also encoded as a parametrized attribute. The characters used to encode 3419/// these attributes are defined by the following enumeration: 3420/// @code 3421/// enum PropertyAttributes { 3422/// kPropertyReadOnly = 'R', // property is read-only. 3423/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3424/// kPropertyByref = '&', // property is a reference to the value last assigned 3425/// kPropertyDynamic = 'D', // property is dynamic 3426/// kPropertyGetter = 'G', // followed by getter selector name 3427/// kPropertySetter = 'S', // followed by setter selector name 3428/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3429/// kPropertyType = 't' // followed by old-style type encoding. 3430/// kPropertyWeak = 'W' // 'weak' property 3431/// kPropertyStrong = 'P' // property GC'able 3432/// kPropertyNonAtomic = 'N' // property non-atomic 3433/// }; 3434/// @endcode 3435void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3436 const Decl *Container, 3437 std::string& S) { 3438 // Collect information from the property implementation decl(s). 3439 bool Dynamic = false; 3440 ObjCPropertyImplDecl *SynthesizePID = 0; 3441 3442 // FIXME: Duplicated code due to poor abstraction. 3443 if (Container) { 3444 if (const ObjCCategoryImplDecl *CID = 3445 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3446 for (ObjCCategoryImplDecl::propimpl_iterator 3447 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3448 i != e; ++i) { 3449 ObjCPropertyImplDecl *PID = *i; 3450 if (PID->getPropertyDecl() == PD) { 3451 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3452 Dynamic = true; 3453 } else { 3454 SynthesizePID = PID; 3455 } 3456 } 3457 } 3458 } else { 3459 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3460 for (ObjCCategoryImplDecl::propimpl_iterator 3461 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3462 i != e; ++i) { 3463 ObjCPropertyImplDecl *PID = *i; 3464 if (PID->getPropertyDecl() == PD) { 3465 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3466 Dynamic = true; 3467 } else { 3468 SynthesizePID = PID; 3469 } 3470 } 3471 } 3472 } 3473 } 3474 3475 // FIXME: This is not very efficient. 3476 S = "T"; 3477 3478 // Encode result type. 3479 // GCC has some special rules regarding encoding of properties which 3480 // closely resembles encoding of ivars. 3481 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3482 true /* outermost type */, 3483 true /* encoding for property */); 3484 3485 if (PD->isReadOnly()) { 3486 S += ",R"; 3487 } else { 3488 switch (PD->getSetterKind()) { 3489 case ObjCPropertyDecl::Assign: break; 3490 case ObjCPropertyDecl::Copy: S += ",C"; break; 3491 case ObjCPropertyDecl::Retain: S += ",&"; break; 3492 } 3493 } 3494 3495 // It really isn't clear at all what this means, since properties 3496 // are "dynamic by default". 3497 if (Dynamic) 3498 S += ",D"; 3499 3500 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3501 S += ",N"; 3502 3503 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3504 S += ",G"; 3505 S += PD->getGetterName().getAsString(); 3506 } 3507 3508 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3509 S += ",S"; 3510 S += PD->getSetterName().getAsString(); 3511 } 3512 3513 if (SynthesizePID) { 3514 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3515 S += ",V"; 3516 S += OID->getNameAsString(); 3517 } 3518 3519 // FIXME: OBJCGC: weak & strong 3520} 3521 3522/// getLegacyIntegralTypeEncoding - 3523/// Another legacy compatibility encoding: 32-bit longs are encoded as 3524/// 'l' or 'L' , but not always. For typedefs, we need to use 3525/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3526/// 3527void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3528 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3529 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3530 if (BT->getKind() == BuiltinType::ULong && 3531 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3532 PointeeTy = UnsignedIntTy; 3533 else 3534 if (BT->getKind() == BuiltinType::Long && 3535 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3536 PointeeTy = IntTy; 3537 } 3538 } 3539} 3540 3541void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3542 const FieldDecl *Field) { 3543 // We follow the behavior of gcc, expanding structures which are 3544 // directly pointed to, and expanding embedded structures. Note that 3545 // these rules are sufficient to prevent recursive encoding of the 3546 // same type. 3547 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3548 true /* outermost type */); 3549} 3550 3551static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 3552 switch (T->getAs<BuiltinType>()->getKind()) { 3553 default: assert(0 && "Unhandled builtin type kind"); 3554 case BuiltinType::Void: return 'v'; 3555 case BuiltinType::Bool: return 'B'; 3556 case BuiltinType::Char_U: 3557 case BuiltinType::UChar: return 'C'; 3558 case BuiltinType::UShort: return 'S'; 3559 case BuiltinType::UInt: return 'I'; 3560 case BuiltinType::ULong: 3561 return 3562 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3563 case BuiltinType::UInt128: return 'T'; 3564 case BuiltinType::ULongLong: return 'Q'; 3565 case BuiltinType::Char_S: 3566 case BuiltinType::SChar: return 'c'; 3567 case BuiltinType::Short: return 's'; 3568 case BuiltinType::WChar: 3569 case BuiltinType::Int: return 'i'; 3570 case BuiltinType::Long: 3571 return 3572 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'l' : 'q'; 3573 case BuiltinType::LongLong: return 'q'; 3574 case BuiltinType::Int128: return 't'; 3575 case BuiltinType::Float: return 'f'; 3576 case BuiltinType::Double: return 'd'; 3577 case BuiltinType::LongDouble: return 'd'; 3578 } 3579} 3580 3581static void EncodeBitField(const ASTContext *Context, std::string& S, 3582 QualType T, const FieldDecl *FD) { 3583 const Expr *E = FD->getBitWidth(); 3584 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3585 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3586 S += 'b'; 3587 // The NeXT runtime encodes bit fields as b followed by the number of bits. 3588 // The GNU runtime requires more information; bitfields are encoded as b, 3589 // then the offset (in bits) of the first element, then the type of the 3590 // bitfield, then the size in bits. For example, in this structure: 3591 // 3592 // struct 3593 // { 3594 // int integer; 3595 // int flags:2; 3596 // }; 3597 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 3598 // runtime, but b32i2 for the GNU runtime. The reason for this extra 3599 // information is not especially sensible, but we're stuck with it for 3600 // compatibility with GCC, although providing it breaks anything that 3601 // actually uses runtime introspection and wants to work on both runtimes... 3602 if (!Ctx->getLangOptions().NeXTRuntime) { 3603 const RecordDecl *RD = FD->getParent(); 3604 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 3605 // FIXME: This same linear search is also used in ExprConstant - it might 3606 // be better if the FieldDecl stored its offset. We'd be increasing the 3607 // size of the object slightly, but saving some time every time it is used. 3608 unsigned i = 0; 3609 for (RecordDecl::field_iterator Field = RD->field_begin(), 3610 FieldEnd = RD->field_end(); 3611 Field != FieldEnd; (void)++Field, ++i) { 3612 if (*Field == FD) 3613 break; 3614 } 3615 S += llvm::utostr(RL.getFieldOffset(i)); 3616 S += ObjCEncodingForPrimitiveKind(Context, T); 3617 } 3618 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3619 S += llvm::utostr(N); 3620} 3621 3622// FIXME: Use SmallString for accumulating string. 3623void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3624 bool ExpandPointedToStructures, 3625 bool ExpandStructures, 3626 const FieldDecl *FD, 3627 bool OutermostType, 3628 bool EncodingProperty) { 3629 if (T->getAs<BuiltinType>()) { 3630 if (FD && FD->isBitField()) 3631 return EncodeBitField(this, S, T, FD); 3632 S += ObjCEncodingForPrimitiveKind(this, T); 3633 return; 3634 } 3635 3636 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3637 S += 'j'; 3638 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3639 false); 3640 return; 3641 } 3642 3643 // encoding for pointer or r3eference types. 3644 QualType PointeeTy; 3645 if (const PointerType *PT = T->getAs<PointerType>()) { 3646 if (PT->isObjCSelType()) { 3647 S += ':'; 3648 return; 3649 } 3650 PointeeTy = PT->getPointeeType(); 3651 } 3652 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3653 PointeeTy = RT->getPointeeType(); 3654 if (!PointeeTy.isNull()) { 3655 bool isReadOnly = false; 3656 // For historical/compatibility reasons, the read-only qualifier of the 3657 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3658 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3659 // Also, do not emit the 'r' for anything but the outermost type! 3660 if (isa<TypedefType>(T.getTypePtr())) { 3661 if (OutermostType && T.isConstQualified()) { 3662 isReadOnly = true; 3663 S += 'r'; 3664 } 3665 } else if (OutermostType) { 3666 QualType P = PointeeTy; 3667 while (P->getAs<PointerType>()) 3668 P = P->getAs<PointerType>()->getPointeeType(); 3669 if (P.isConstQualified()) { 3670 isReadOnly = true; 3671 S += 'r'; 3672 } 3673 } 3674 if (isReadOnly) { 3675 // Another legacy compatibility encoding. Some ObjC qualifier and type 3676 // combinations need to be rearranged. 3677 // Rewrite "in const" from "nr" to "rn" 3678 if (llvm::StringRef(S).endswith("nr")) 3679 S.replace(S.end()-2, S.end(), "rn"); 3680 } 3681 3682 if (PointeeTy->isCharType()) { 3683 // char pointer types should be encoded as '*' unless it is a 3684 // type that has been typedef'd to 'BOOL'. 3685 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3686 S += '*'; 3687 return; 3688 } 3689 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3690 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3691 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3692 S += '#'; 3693 return; 3694 } 3695 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3696 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3697 S += '@'; 3698 return; 3699 } 3700 // fall through... 3701 } 3702 S += '^'; 3703 getLegacyIntegralTypeEncoding(PointeeTy); 3704 3705 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3706 NULL); 3707 return; 3708 } 3709 3710 if (const ArrayType *AT = 3711 // Ignore type qualifiers etc. 3712 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3713 if (isa<IncompleteArrayType>(AT)) { 3714 // Incomplete arrays are encoded as a pointer to the array element. 3715 S += '^'; 3716 3717 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3718 false, ExpandStructures, FD); 3719 } else { 3720 S += '['; 3721 3722 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3723 S += llvm::utostr(CAT->getSize().getZExtValue()); 3724 else { 3725 //Variable length arrays are encoded as a regular array with 0 elements. 3726 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3727 S += '0'; 3728 } 3729 3730 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3731 false, ExpandStructures, FD); 3732 S += ']'; 3733 } 3734 return; 3735 } 3736 3737 if (T->getAs<FunctionType>()) { 3738 S += '?'; 3739 return; 3740 } 3741 3742 if (const RecordType *RTy = T->getAs<RecordType>()) { 3743 RecordDecl *RDecl = RTy->getDecl(); 3744 S += RDecl->isUnion() ? '(' : '{'; 3745 // Anonymous structures print as '?' 3746 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3747 S += II->getName(); 3748 if (ClassTemplateSpecializationDecl *Spec 3749 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 3750 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 3751 std::string TemplateArgsStr 3752 = TemplateSpecializationType::PrintTemplateArgumentList( 3753 TemplateArgs.getFlatArgumentList(), 3754 TemplateArgs.flat_size(), 3755 (*this).PrintingPolicy); 3756 3757 S += TemplateArgsStr; 3758 } 3759 } else { 3760 S += '?'; 3761 } 3762 if (ExpandStructures) { 3763 S += '='; 3764 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3765 FieldEnd = RDecl->field_end(); 3766 Field != FieldEnd; ++Field) { 3767 if (FD) { 3768 S += '"'; 3769 S += Field->getNameAsString(); 3770 S += '"'; 3771 } 3772 3773 // Special case bit-fields. 3774 if (Field->isBitField()) { 3775 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3776 (*Field)); 3777 } else { 3778 QualType qt = Field->getType(); 3779 getLegacyIntegralTypeEncoding(qt); 3780 getObjCEncodingForTypeImpl(qt, S, false, true, 3781 FD); 3782 } 3783 } 3784 } 3785 S += RDecl->isUnion() ? ')' : '}'; 3786 return; 3787 } 3788 3789 if (T->isEnumeralType()) { 3790 if (FD && FD->isBitField()) 3791 EncodeBitField(this, S, T, FD); 3792 else 3793 S += 'i'; 3794 return; 3795 } 3796 3797 if (T->isBlockPointerType()) { 3798 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3799 return; 3800 } 3801 3802 // Ignore protocol qualifiers when mangling at this level. 3803 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 3804 T = OT->getBaseType(); 3805 3806 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3807 // @encode(class_name) 3808 ObjCInterfaceDecl *OI = OIT->getDecl(); 3809 S += '{'; 3810 const IdentifierInfo *II = OI->getIdentifier(); 3811 S += II->getName(); 3812 S += '='; 3813 llvm::SmallVector<FieldDecl*, 32> RecFields; 3814 CollectObjCIvars(OI, RecFields); 3815 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 3816 if (RecFields[i]->isBitField()) 3817 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3818 RecFields[i]); 3819 else 3820 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3821 FD); 3822 } 3823 S += '}'; 3824 return; 3825 } 3826 3827 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 3828 if (OPT->isObjCIdType()) { 3829 S += '@'; 3830 return; 3831 } 3832 3833 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 3834 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 3835 // Since this is a binary compatibility issue, need to consult with runtime 3836 // folks. Fortunately, this is a *very* obsure construct. 3837 S += '#'; 3838 return; 3839 } 3840 3841 if (OPT->isObjCQualifiedIdType()) { 3842 getObjCEncodingForTypeImpl(getObjCIdType(), S, 3843 ExpandPointedToStructures, 3844 ExpandStructures, FD); 3845 if (FD || EncodingProperty) { 3846 // Note that we do extended encoding of protocol qualifer list 3847 // Only when doing ivar or property encoding. 3848 S += '"'; 3849 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3850 E = OPT->qual_end(); I != E; ++I) { 3851 S += '<'; 3852 S += (*I)->getNameAsString(); 3853 S += '>'; 3854 } 3855 S += '"'; 3856 } 3857 return; 3858 } 3859 3860 QualType PointeeTy = OPT->getPointeeType(); 3861 if (!EncodingProperty && 3862 isa<TypedefType>(PointeeTy.getTypePtr())) { 3863 // Another historical/compatibility reason. 3864 // We encode the underlying type which comes out as 3865 // {...}; 3866 S += '^'; 3867 getObjCEncodingForTypeImpl(PointeeTy, S, 3868 false, ExpandPointedToStructures, 3869 NULL); 3870 return; 3871 } 3872 3873 S += '@'; 3874 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 3875 S += '"'; 3876 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 3877 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3878 E = OPT->qual_end(); I != E; ++I) { 3879 S += '<'; 3880 S += (*I)->getNameAsString(); 3881 S += '>'; 3882 } 3883 S += '"'; 3884 } 3885 return; 3886 } 3887 3888 // gcc just blithely ignores member pointers. 3889 // TODO: maybe there should be a mangling for these 3890 if (T->getAs<MemberPointerType>()) 3891 return; 3892 3893 assert(0 && "@encode for type not implemented!"); 3894} 3895 3896void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 3897 std::string& S) const { 3898 if (QT & Decl::OBJC_TQ_In) 3899 S += 'n'; 3900 if (QT & Decl::OBJC_TQ_Inout) 3901 S += 'N'; 3902 if (QT & Decl::OBJC_TQ_Out) 3903 S += 'o'; 3904 if (QT & Decl::OBJC_TQ_Bycopy) 3905 S += 'O'; 3906 if (QT & Decl::OBJC_TQ_Byref) 3907 S += 'R'; 3908 if (QT & Decl::OBJC_TQ_Oneway) 3909 S += 'V'; 3910} 3911 3912void ASTContext::setBuiltinVaListType(QualType T) { 3913 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 3914 3915 BuiltinVaListType = T; 3916} 3917 3918void ASTContext::setObjCIdType(QualType T) { 3919 ObjCIdTypedefType = T; 3920} 3921 3922void ASTContext::setObjCSelType(QualType T) { 3923 ObjCSelTypedefType = T; 3924} 3925 3926void ASTContext::setObjCProtoType(QualType QT) { 3927 ObjCProtoType = QT; 3928} 3929 3930void ASTContext::setObjCClassType(QualType T) { 3931 ObjCClassTypedefType = T; 3932} 3933 3934void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 3935 assert(ObjCConstantStringType.isNull() && 3936 "'NSConstantString' type already set!"); 3937 3938 ObjCConstantStringType = getObjCInterfaceType(Decl); 3939} 3940 3941/// \brief Retrieve the template name that corresponds to a non-empty 3942/// lookup. 3943TemplateName ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 3944 UnresolvedSetIterator End) { 3945 unsigned size = End - Begin; 3946 assert(size > 1 && "set is not overloaded!"); 3947 3948 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 3949 size * sizeof(FunctionTemplateDecl*)); 3950 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 3951 3952 NamedDecl **Storage = OT->getStorage(); 3953 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 3954 NamedDecl *D = *I; 3955 assert(isa<FunctionTemplateDecl>(D) || 3956 (isa<UsingShadowDecl>(D) && 3957 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 3958 *Storage++ = D; 3959 } 3960 3961 return TemplateName(OT); 3962} 3963 3964/// \brief Retrieve the template name that represents a qualified 3965/// template name such as \c std::vector. 3966TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 3967 bool TemplateKeyword, 3968 TemplateDecl *Template) { 3969 // FIXME: Canonicalization? 3970 llvm::FoldingSetNodeID ID; 3971 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 3972 3973 void *InsertPos = 0; 3974 QualifiedTemplateName *QTN = 3975 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3976 if (!QTN) { 3977 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 3978 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 3979 } 3980 3981 return TemplateName(QTN); 3982} 3983 3984/// \brief Retrieve the template name that represents a dependent 3985/// template name such as \c MetaFun::template apply. 3986TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3987 const IdentifierInfo *Name) { 3988 assert((!NNS || NNS->isDependent()) && 3989 "Nested name specifier must be dependent"); 3990 3991 llvm::FoldingSetNodeID ID; 3992 DependentTemplateName::Profile(ID, NNS, Name); 3993 3994 void *InsertPos = 0; 3995 DependentTemplateName *QTN = 3996 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3997 3998 if (QTN) 3999 return TemplateName(QTN); 4000 4001 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4002 if (CanonNNS == NNS) { 4003 QTN = new (*this,4) DependentTemplateName(NNS, Name); 4004 } else { 4005 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 4006 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 4007 DependentTemplateName *CheckQTN = 4008 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4009 assert(!CheckQTN && "Dependent type name canonicalization broken"); 4010 (void)CheckQTN; 4011 } 4012 4013 DependentTemplateNames.InsertNode(QTN, InsertPos); 4014 return TemplateName(QTN); 4015} 4016 4017/// \brief Retrieve the template name that represents a dependent 4018/// template name such as \c MetaFun::template operator+. 4019TemplateName 4020ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4021 OverloadedOperatorKind Operator) { 4022 assert((!NNS || NNS->isDependent()) && 4023 "Nested name specifier must be dependent"); 4024 4025 llvm::FoldingSetNodeID ID; 4026 DependentTemplateName::Profile(ID, NNS, Operator); 4027 4028 void *InsertPos = 0; 4029 DependentTemplateName *QTN 4030 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4031 4032 if (QTN) 4033 return TemplateName(QTN); 4034 4035 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4036 if (CanonNNS == NNS) { 4037 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 4038 } else { 4039 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 4040 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 4041 4042 DependentTemplateName *CheckQTN 4043 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4044 assert(!CheckQTN && "Dependent template name canonicalization broken"); 4045 (void)CheckQTN; 4046 } 4047 4048 DependentTemplateNames.InsertNode(QTN, InsertPos); 4049 return TemplateName(QTN); 4050} 4051 4052/// getFromTargetType - Given one of the integer types provided by 4053/// TargetInfo, produce the corresponding type. The unsigned @p Type 4054/// is actually a value of type @c TargetInfo::IntType. 4055CanQualType ASTContext::getFromTargetType(unsigned Type) const { 4056 switch (Type) { 4057 case TargetInfo::NoInt: return CanQualType(); 4058 case TargetInfo::SignedShort: return ShortTy; 4059 case TargetInfo::UnsignedShort: return UnsignedShortTy; 4060 case TargetInfo::SignedInt: return IntTy; 4061 case TargetInfo::UnsignedInt: return UnsignedIntTy; 4062 case TargetInfo::SignedLong: return LongTy; 4063 case TargetInfo::UnsignedLong: return UnsignedLongTy; 4064 case TargetInfo::SignedLongLong: return LongLongTy; 4065 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 4066 } 4067 4068 assert(false && "Unhandled TargetInfo::IntType value"); 4069 return CanQualType(); 4070} 4071 4072//===----------------------------------------------------------------------===// 4073// Type Predicates. 4074//===----------------------------------------------------------------------===// 4075 4076/// isObjCNSObjectType - Return true if this is an NSObject object using 4077/// NSObject attribute on a c-style pointer type. 4078/// FIXME - Make it work directly on types. 4079/// FIXME: Move to Type. 4080/// 4081bool ASTContext::isObjCNSObjectType(QualType Ty) const { 4082 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 4083 if (TypedefDecl *TD = TDT->getDecl()) 4084 if (TD->getAttr<ObjCNSObjectAttr>()) 4085 return true; 4086 } 4087 return false; 4088} 4089 4090/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 4091/// garbage collection attribute. 4092/// 4093Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 4094 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 4095 if (getLangOptions().ObjC1 && 4096 getLangOptions().getGCMode() != LangOptions::NonGC) { 4097 GCAttrs = Ty.getObjCGCAttr(); 4098 // Default behavious under objective-c's gc is for objective-c pointers 4099 // (or pointers to them) be treated as though they were declared 4100 // as __strong. 4101 if (GCAttrs == Qualifiers::GCNone) { 4102 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 4103 GCAttrs = Qualifiers::Strong; 4104 else if (Ty->isPointerType()) 4105 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 4106 } 4107 // Non-pointers have none gc'able attribute regardless of the attribute 4108 // set on them. 4109 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 4110 return Qualifiers::GCNone; 4111 } 4112 return GCAttrs; 4113} 4114 4115//===----------------------------------------------------------------------===// 4116// Type Compatibility Testing 4117//===----------------------------------------------------------------------===// 4118 4119/// areCompatVectorTypes - Return true if the two specified vector types are 4120/// compatible. 4121static bool areCompatVectorTypes(const VectorType *LHS, 4122 const VectorType *RHS) { 4123 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 4124 return LHS->getElementType() == RHS->getElementType() && 4125 LHS->getNumElements() == RHS->getNumElements(); 4126} 4127 4128//===----------------------------------------------------------------------===// 4129// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 4130//===----------------------------------------------------------------------===// 4131 4132/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 4133/// inheritance hierarchy of 'rProto'. 4134bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 4135 ObjCProtocolDecl *rProto) { 4136 if (lProto == rProto) 4137 return true; 4138 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 4139 E = rProto->protocol_end(); PI != E; ++PI) 4140 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 4141 return true; 4142 return false; 4143} 4144 4145/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 4146/// return true if lhs's protocols conform to rhs's protocol; false 4147/// otherwise. 4148bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 4149 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 4150 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 4151 return false; 4152} 4153 4154/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 4155/// ObjCQualifiedIDType. 4156bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4157 bool compare) { 4158 // Allow id<P..> and an 'id' or void* type in all cases. 4159 if (lhs->isVoidPointerType() || 4160 lhs->isObjCIdType() || lhs->isObjCClassType()) 4161 return true; 4162 else if (rhs->isVoidPointerType() || 4163 rhs->isObjCIdType() || rhs->isObjCClassType()) 4164 return true; 4165 4166 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4167 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4168 4169 if (!rhsOPT) return false; 4170 4171 if (rhsOPT->qual_empty()) { 4172 // If the RHS is a unqualified interface pointer "NSString*", 4173 // make sure we check the class hierarchy. 4174 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4175 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4176 E = lhsQID->qual_end(); I != E; ++I) { 4177 // when comparing an id<P> on lhs with a static type on rhs, 4178 // see if static class implements all of id's protocols, directly or 4179 // through its super class and categories. 4180 if (!rhsID->ClassImplementsProtocol(*I, true)) 4181 return false; 4182 } 4183 } 4184 // If there are no qualifiers and no interface, we have an 'id'. 4185 return true; 4186 } 4187 // Both the right and left sides have qualifiers. 4188 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4189 E = lhsQID->qual_end(); I != E; ++I) { 4190 ObjCProtocolDecl *lhsProto = *I; 4191 bool match = false; 4192 4193 // when comparing an id<P> on lhs with a static type on rhs, 4194 // see if static class implements all of id's protocols, directly or 4195 // through its super class and categories. 4196 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4197 E = rhsOPT->qual_end(); J != E; ++J) { 4198 ObjCProtocolDecl *rhsProto = *J; 4199 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4200 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4201 match = true; 4202 break; 4203 } 4204 } 4205 // If the RHS is a qualified interface pointer "NSString<P>*", 4206 // make sure we check the class hierarchy. 4207 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4208 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4209 E = lhsQID->qual_end(); I != E; ++I) { 4210 // when comparing an id<P> on lhs with a static type on rhs, 4211 // see if static class implements all of id's protocols, directly or 4212 // through its super class and categories. 4213 if (rhsID->ClassImplementsProtocol(*I, true)) { 4214 match = true; 4215 break; 4216 } 4217 } 4218 } 4219 if (!match) 4220 return false; 4221 } 4222 4223 return true; 4224 } 4225 4226 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4227 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4228 4229 if (const ObjCObjectPointerType *lhsOPT = 4230 lhs->getAsObjCInterfacePointerType()) { 4231 if (lhsOPT->qual_empty()) { 4232 bool match = false; 4233 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4234 for (ObjCObjectPointerType::qual_iterator I = rhsQID->qual_begin(), 4235 E = rhsQID->qual_end(); I != E; ++I) { 4236 // when comparing an id<P> on lhs with a static type on rhs, 4237 // see if static class implements all of id's protocols, directly or 4238 // through its super class and categories. 4239 if (lhsID->ClassImplementsProtocol(*I, true)) { 4240 match = true; 4241 break; 4242 } 4243 } 4244 if (!match) 4245 return false; 4246 } 4247 return true; 4248 } 4249 // Both the right and left sides have qualifiers. 4250 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4251 E = lhsOPT->qual_end(); I != E; ++I) { 4252 ObjCProtocolDecl *lhsProto = *I; 4253 bool match = false; 4254 4255 // when comparing an id<P> on lhs with a static type on rhs, 4256 // see if static class implements all of id's protocols, directly or 4257 // through its super class and categories. 4258 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4259 E = rhsQID->qual_end(); J != E; ++J) { 4260 ObjCProtocolDecl *rhsProto = *J; 4261 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4262 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4263 match = true; 4264 break; 4265 } 4266 } 4267 if (!match) 4268 return false; 4269 } 4270 return true; 4271 } 4272 return false; 4273} 4274 4275/// canAssignObjCInterfaces - Return true if the two interface types are 4276/// compatible for assignment from RHS to LHS. This handles validation of any 4277/// protocol qualifiers on the LHS or RHS. 4278/// 4279bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4280 const ObjCObjectPointerType *RHSOPT) { 4281 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4282 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4283 4284 // If either type represents the built-in 'id' or 'Class' types, return true. 4285 if (LHS->isObjCUnqualifiedIdOrClass() || 4286 RHS->isObjCUnqualifiedIdOrClass()) 4287 return true; 4288 4289 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 4290 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4291 QualType(RHSOPT,0), 4292 false); 4293 4294 // If we have 2 user-defined types, fall into that path. 4295 if (LHS->getInterface() && RHS->getInterface()) 4296 return canAssignObjCInterfaces(LHS, RHS); 4297 4298 return false; 4299} 4300 4301/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4302/// for providing type-safty for objective-c pointers used to pass/return 4303/// arguments in block literals. When passed as arguments, passing 'A*' where 4304/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4305/// not OK. For the return type, the opposite is not OK. 4306bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4307 const ObjCObjectPointerType *LHSOPT, 4308 const ObjCObjectPointerType *RHSOPT) { 4309 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4310 return true; 4311 4312 if (LHSOPT->isObjCBuiltinType()) { 4313 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4314 } 4315 4316 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4317 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4318 QualType(RHSOPT,0), 4319 false); 4320 4321 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4322 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4323 if (LHS && RHS) { // We have 2 user-defined types. 4324 if (LHS != RHS) { 4325 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4326 return false; 4327 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4328 return true; 4329 } 4330 else 4331 return true; 4332 } 4333 return false; 4334} 4335 4336/// getIntersectionOfProtocols - This routine finds the intersection of set 4337/// of protocols inherited from two distinct objective-c pointer objects. 4338/// It is used to build composite qualifier list of the composite type of 4339/// the conditional expression involving two objective-c pointer objects. 4340static 4341void getIntersectionOfProtocols(ASTContext &Context, 4342 const ObjCObjectPointerType *LHSOPT, 4343 const ObjCObjectPointerType *RHSOPT, 4344 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4345 4346 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4347 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4348 assert(LHS->getInterface() && "LHS must have an interface base"); 4349 assert(RHS->getInterface() && "RHS must have an interface base"); 4350 4351 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4352 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4353 if (LHSNumProtocols > 0) 4354 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4355 else { 4356 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4357 Context.CollectInheritedProtocols(LHS->getInterface(), 4358 LHSInheritedProtocols); 4359 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4360 LHSInheritedProtocols.end()); 4361 } 4362 4363 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4364 if (RHSNumProtocols > 0) { 4365 ObjCProtocolDecl **RHSProtocols = 4366 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4367 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4368 if (InheritedProtocolSet.count(RHSProtocols[i])) 4369 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4370 } 4371 else { 4372 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4373 Context.CollectInheritedProtocols(RHS->getInterface(), 4374 RHSInheritedProtocols); 4375 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4376 RHSInheritedProtocols.begin(), 4377 E = RHSInheritedProtocols.end(); I != E; ++I) 4378 if (InheritedProtocolSet.count((*I))) 4379 IntersectionOfProtocols.push_back((*I)); 4380 } 4381} 4382 4383/// areCommonBaseCompatible - Returns common base class of the two classes if 4384/// one found. Note that this is O'2 algorithm. But it will be called as the 4385/// last type comparison in a ?-exp of ObjC pointer types before a 4386/// warning is issued. So, its invokation is extremely rare. 4387QualType ASTContext::areCommonBaseCompatible( 4388 const ObjCObjectPointerType *Lptr, 4389 const ObjCObjectPointerType *Rptr) { 4390 const ObjCObjectType *LHS = Lptr->getObjectType(); 4391 const ObjCObjectType *RHS = Rptr->getObjectType(); 4392 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 4393 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 4394 if (!LDecl || !RDecl) 4395 return QualType(); 4396 4397 while ((LDecl = LDecl->getSuperClass())) { 4398 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 4399 if (canAssignObjCInterfaces(LHS, RHS)) { 4400 llvm::SmallVector<ObjCProtocolDecl *, 8> Protocols; 4401 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 4402 4403 QualType Result = QualType(LHS, 0); 4404 if (!Protocols.empty()) 4405 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 4406 Result = getObjCObjectPointerType(Result); 4407 return Result; 4408 } 4409 } 4410 4411 return QualType(); 4412} 4413 4414bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 4415 const ObjCObjectType *RHS) { 4416 assert(LHS->getInterface() && "LHS is not an interface type"); 4417 assert(RHS->getInterface() && "RHS is not an interface type"); 4418 4419 // Verify that the base decls are compatible: the RHS must be a subclass of 4420 // the LHS. 4421 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 4422 return false; 4423 4424 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4425 // protocol qualified at all, then we are good. 4426 if (LHS->getNumProtocols() == 0) 4427 return true; 4428 4429 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4430 // isn't a superset. 4431 if (RHS->getNumProtocols() == 0) 4432 return true; // FIXME: should return false! 4433 4434 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 4435 LHSPE = LHS->qual_end(); 4436 LHSPI != LHSPE; LHSPI++) { 4437 bool RHSImplementsProtocol = false; 4438 4439 // If the RHS doesn't implement the protocol on the left, the types 4440 // are incompatible. 4441 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 4442 RHSPE = RHS->qual_end(); 4443 RHSPI != RHSPE; RHSPI++) { 4444 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4445 RHSImplementsProtocol = true; 4446 break; 4447 } 4448 } 4449 // FIXME: For better diagnostics, consider passing back the protocol name. 4450 if (!RHSImplementsProtocol) 4451 return false; 4452 } 4453 // The RHS implements all protocols listed on the LHS. 4454 return true; 4455} 4456 4457bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4458 // get the "pointed to" types 4459 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4460 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4461 4462 if (!LHSOPT || !RHSOPT) 4463 return false; 4464 4465 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4466 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4467} 4468 4469/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4470/// both shall have the identically qualified version of a compatible type. 4471/// C99 6.2.7p1: Two types have compatible types if their types are the 4472/// same. See 6.7.[2,3,5] for additional rules. 4473bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 4474 if (getLangOptions().CPlusPlus) 4475 return hasSameType(LHS, RHS); 4476 4477 return !mergeTypes(LHS, RHS).isNull(); 4478} 4479 4480bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 4481 return !mergeTypes(LHS, RHS, true).isNull(); 4482} 4483 4484QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 4485 bool OfBlockPointer) { 4486 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4487 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4488 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4489 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4490 bool allLTypes = true; 4491 bool allRTypes = true; 4492 4493 // Check return type 4494 QualType retType; 4495 if (OfBlockPointer) 4496 retType = mergeTypes(rbase->getResultType(), lbase->getResultType(), true); 4497 else 4498 retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 4499 if (retType.isNull()) return QualType(); 4500 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 4501 allLTypes = false; 4502 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 4503 allRTypes = false; 4504 // FIXME: double check this 4505 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 4506 // rbase->getRegParmAttr() != 0 && 4507 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 4508 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 4509 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 4510 unsigned RegParm = lbaseInfo.getRegParm() == 0 ? rbaseInfo.getRegParm() : 4511 lbaseInfo.getRegParm(); 4512 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 4513 if (NoReturn != lbaseInfo.getNoReturn() || 4514 RegParm != lbaseInfo.getRegParm()) 4515 allLTypes = false; 4516 if (NoReturn != rbaseInfo.getNoReturn() || 4517 RegParm != rbaseInfo.getRegParm()) 4518 allRTypes = false; 4519 CallingConv lcc = lbaseInfo.getCC(); 4520 CallingConv rcc = rbaseInfo.getCC(); 4521 // Compatible functions must have compatible calling conventions 4522 if (!isSameCallConv(lcc, rcc)) 4523 return QualType(); 4524 4525 if (lproto && rproto) { // two C99 style function prototypes 4526 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4527 "C++ shouldn't be here"); 4528 unsigned lproto_nargs = lproto->getNumArgs(); 4529 unsigned rproto_nargs = rproto->getNumArgs(); 4530 4531 // Compatible functions must have the same number of arguments 4532 if (lproto_nargs != rproto_nargs) 4533 return QualType(); 4534 4535 // Variadic and non-variadic functions aren't compatible 4536 if (lproto->isVariadic() != rproto->isVariadic()) 4537 return QualType(); 4538 4539 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4540 return QualType(); 4541 4542 // Check argument compatibility 4543 llvm::SmallVector<QualType, 10> types; 4544 for (unsigned i = 0; i < lproto_nargs; i++) { 4545 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4546 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4547 QualType argtype = mergeTypes(largtype, rargtype, OfBlockPointer); 4548 if (argtype.isNull()) return QualType(); 4549 types.push_back(argtype); 4550 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4551 allLTypes = false; 4552 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4553 allRTypes = false; 4554 } 4555 if (allLTypes) return lhs; 4556 if (allRTypes) return rhs; 4557 return getFunctionType(retType, types.begin(), types.size(), 4558 lproto->isVariadic(), lproto->getTypeQuals(), 4559 false, false, 0, 0, 4560 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4561 } 4562 4563 if (lproto) allRTypes = false; 4564 if (rproto) allLTypes = false; 4565 4566 const FunctionProtoType *proto = lproto ? lproto : rproto; 4567 if (proto) { 4568 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4569 if (proto->isVariadic()) return QualType(); 4570 // Check that the types are compatible with the types that 4571 // would result from default argument promotions (C99 6.7.5.3p15). 4572 // The only types actually affected are promotable integer 4573 // types and floats, which would be passed as a different 4574 // type depending on whether the prototype is visible. 4575 unsigned proto_nargs = proto->getNumArgs(); 4576 for (unsigned i = 0; i < proto_nargs; ++i) { 4577 QualType argTy = proto->getArgType(i); 4578 4579 // Look at the promotion type of enum types, since that is the type used 4580 // to pass enum values. 4581 if (const EnumType *Enum = argTy->getAs<EnumType>()) 4582 argTy = Enum->getDecl()->getPromotionType(); 4583 4584 if (argTy->isPromotableIntegerType() || 4585 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4586 return QualType(); 4587 } 4588 4589 if (allLTypes) return lhs; 4590 if (allRTypes) return rhs; 4591 return getFunctionType(retType, proto->arg_type_begin(), 4592 proto->getNumArgs(), proto->isVariadic(), 4593 proto->getTypeQuals(), 4594 false, false, 0, 0, 4595 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4596 } 4597 4598 if (allLTypes) return lhs; 4599 if (allRTypes) return rhs; 4600 FunctionType::ExtInfo Info(NoReturn, RegParm, lcc); 4601 return getFunctionNoProtoType(retType, Info); 4602} 4603 4604QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 4605 bool OfBlockPointer) { 4606 // C++ [expr]: If an expression initially has the type "reference to T", the 4607 // type is adjusted to "T" prior to any further analysis, the expression 4608 // designates the object or function denoted by the reference, and the 4609 // expression is an lvalue unless the reference is an rvalue reference and 4610 // the expression is a function call (possibly inside parentheses). 4611 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 4612 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 4613 4614 QualType LHSCan = getCanonicalType(LHS), 4615 RHSCan = getCanonicalType(RHS); 4616 4617 // If two types are identical, they are compatible. 4618 if (LHSCan == RHSCan) 4619 return LHS; 4620 4621 // If the qualifiers are different, the types aren't compatible... mostly. 4622 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4623 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4624 if (LQuals != RQuals) { 4625 // If any of these qualifiers are different, we have a type 4626 // mismatch. 4627 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4628 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4629 return QualType(); 4630 4631 // Exactly one GC qualifier difference is allowed: __strong is 4632 // okay if the other type has no GC qualifier but is an Objective 4633 // C object pointer (i.e. implicitly strong by default). We fix 4634 // this by pretending that the unqualified type was actually 4635 // qualified __strong. 4636 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4637 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4638 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4639 4640 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4641 return QualType(); 4642 4643 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4644 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4645 } 4646 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4647 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4648 } 4649 return QualType(); 4650 } 4651 4652 // Okay, qualifiers are equal. 4653 4654 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4655 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4656 4657 // We want to consider the two function types to be the same for these 4658 // comparisons, just force one to the other. 4659 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 4660 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 4661 4662 // Same as above for arrays 4663 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 4664 LHSClass = Type::ConstantArray; 4665 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 4666 RHSClass = Type::ConstantArray; 4667 4668 // ObjCInterfaces are just specialized ObjCObjects. 4669 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 4670 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 4671 4672 // Canonicalize ExtVector -> Vector. 4673 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 4674 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 4675 4676 // If the canonical type classes don't match. 4677 if (LHSClass != RHSClass) { 4678 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 4679 // a signed integer type, or an unsigned integer type. 4680 // Compatibility is based on the underlying type, not the promotion 4681 // type. 4682 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 4683 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 4684 return RHS; 4685 } 4686 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 4687 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 4688 return LHS; 4689 } 4690 4691 return QualType(); 4692 } 4693 4694 // The canonical type classes match. 4695 switch (LHSClass) { 4696#define TYPE(Class, Base) 4697#define ABSTRACT_TYPE(Class, Base) 4698#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 4699#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4700#define DEPENDENT_TYPE(Class, Base) case Type::Class: 4701#include "clang/AST/TypeNodes.def" 4702 assert(false && "Non-canonical and dependent types shouldn't get here"); 4703 return QualType(); 4704 4705 case Type::LValueReference: 4706 case Type::RValueReference: 4707 case Type::MemberPointer: 4708 assert(false && "C++ should never be in mergeTypes"); 4709 return QualType(); 4710 4711 case Type::ObjCInterface: 4712 case Type::IncompleteArray: 4713 case Type::VariableArray: 4714 case Type::FunctionProto: 4715 case Type::ExtVector: 4716 assert(false && "Types are eliminated above"); 4717 return QualType(); 4718 4719 case Type::Pointer: 4720 { 4721 // Merge two pointer types, while trying to preserve typedef info 4722 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 4723 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 4724 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 4725 if (ResultType.isNull()) return QualType(); 4726 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4727 return LHS; 4728 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4729 return RHS; 4730 return getPointerType(ResultType); 4731 } 4732 case Type::BlockPointer: 4733 { 4734 // Merge two block pointer types, while trying to preserve typedef info 4735 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 4736 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 4737 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer); 4738 if (ResultType.isNull()) return QualType(); 4739 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4740 return LHS; 4741 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4742 return RHS; 4743 return getBlockPointerType(ResultType); 4744 } 4745 case Type::ConstantArray: 4746 { 4747 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 4748 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 4749 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 4750 return QualType(); 4751 4752 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 4753 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 4754 QualType ResultType = mergeTypes(LHSElem, RHSElem); 4755 if (ResultType.isNull()) return QualType(); 4756 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4757 return LHS; 4758 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4759 return RHS; 4760 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 4761 ArrayType::ArraySizeModifier(), 0); 4762 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 4763 ArrayType::ArraySizeModifier(), 0); 4764 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 4765 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 4766 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4767 return LHS; 4768 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4769 return RHS; 4770 if (LVAT) { 4771 // FIXME: This isn't correct! But tricky to implement because 4772 // the array's size has to be the size of LHS, but the type 4773 // has to be different. 4774 return LHS; 4775 } 4776 if (RVAT) { 4777 // FIXME: This isn't correct! But tricky to implement because 4778 // the array's size has to be the size of RHS, but the type 4779 // has to be different. 4780 return RHS; 4781 } 4782 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 4783 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 4784 return getIncompleteArrayType(ResultType, 4785 ArrayType::ArraySizeModifier(), 0); 4786 } 4787 case Type::FunctionNoProto: 4788 return mergeFunctionTypes(LHS, RHS, OfBlockPointer); 4789 case Type::Record: 4790 case Type::Enum: 4791 return QualType(); 4792 case Type::Builtin: 4793 // Only exactly equal builtin types are compatible, which is tested above. 4794 return QualType(); 4795 case Type::Complex: 4796 // Distinct complex types are incompatible. 4797 return QualType(); 4798 case Type::Vector: 4799 // FIXME: The merged type should be an ExtVector! 4800 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 4801 RHSCan->getAs<VectorType>())) 4802 return LHS; 4803 return QualType(); 4804 case Type::ObjCObject: { 4805 // Check if the types are assignment compatible. 4806 // FIXME: This should be type compatibility, e.g. whether 4807 // "LHS x; RHS x;" at global scope is legal. 4808 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 4809 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 4810 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 4811 return LHS; 4812 4813 return QualType(); 4814 } 4815 case Type::ObjCObjectPointer: { 4816 if (OfBlockPointer) { 4817 if (canAssignObjCInterfacesInBlockPointer( 4818 LHS->getAs<ObjCObjectPointerType>(), 4819 RHS->getAs<ObjCObjectPointerType>())) 4820 return LHS; 4821 return QualType(); 4822 } 4823 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 4824 RHS->getAs<ObjCObjectPointerType>())) 4825 return LHS; 4826 4827 return QualType(); 4828 } 4829 } 4830 4831 return QualType(); 4832} 4833 4834/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 4835/// 'RHS' attributes and returns the merged version; including for function 4836/// return types. 4837QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 4838 QualType LHSCan = getCanonicalType(LHS), 4839 RHSCan = getCanonicalType(RHS); 4840 // If two types are identical, they are compatible. 4841 if (LHSCan == RHSCan) 4842 return LHS; 4843 if (RHSCan->isFunctionType()) { 4844 if (!LHSCan->isFunctionType()) 4845 return QualType(); 4846 QualType OldReturnType = 4847 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 4848 QualType NewReturnType = 4849 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 4850 QualType ResReturnType = 4851 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 4852 if (ResReturnType.isNull()) 4853 return QualType(); 4854 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 4855 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 4856 // In either case, use OldReturnType to build the new function type. 4857 const FunctionType *F = LHS->getAs<FunctionType>(); 4858 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 4859 FunctionType::ExtInfo Info = getFunctionExtInfo(LHS); 4860 QualType ResultType 4861 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 4862 FPT->getNumArgs(), FPT->isVariadic(), 4863 FPT->getTypeQuals(), 4864 FPT->hasExceptionSpec(), 4865 FPT->hasAnyExceptionSpec(), 4866 FPT->getNumExceptions(), 4867 FPT->exception_begin(), 4868 Info); 4869 return ResultType; 4870 } 4871 } 4872 return QualType(); 4873 } 4874 4875 // If the qualifiers are different, the types can still be merged. 4876 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4877 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4878 if (LQuals != RQuals) { 4879 // If any of these qualifiers are different, we have a type mismatch. 4880 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4881 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4882 return QualType(); 4883 4884 // Exactly one GC qualifier difference is allowed: __strong is 4885 // okay if the other type has no GC qualifier but is an Objective 4886 // C object pointer (i.e. implicitly strong by default). We fix 4887 // this by pretending that the unqualified type was actually 4888 // qualified __strong. 4889 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4890 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4891 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4892 4893 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4894 return QualType(); 4895 4896 if (GC_L == Qualifiers::Strong) 4897 return LHS; 4898 if (GC_R == Qualifiers::Strong) 4899 return RHS; 4900 return QualType(); 4901 } 4902 4903 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 4904 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 4905 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 4906 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 4907 if (ResQT == LHSBaseQT) 4908 return LHS; 4909 if (ResQT == RHSBaseQT) 4910 return RHS; 4911 } 4912 return QualType(); 4913} 4914 4915//===----------------------------------------------------------------------===// 4916// Integer Predicates 4917//===----------------------------------------------------------------------===// 4918 4919unsigned ASTContext::getIntWidth(QualType T) { 4920 if (T->isBooleanType()) 4921 return 1; 4922 if (EnumType *ET = dyn_cast<EnumType>(T)) 4923 T = ET->getDecl()->getIntegerType(); 4924 // For builtin types, just use the standard type sizing method 4925 return (unsigned)getTypeSize(T); 4926} 4927 4928QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 4929 assert(T->isSignedIntegerType() && "Unexpected type"); 4930 4931 // Turn <4 x signed int> -> <4 x unsigned int> 4932 if (const VectorType *VTy = T->getAs<VectorType>()) 4933 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 4934 VTy->getNumElements(), VTy->isAltiVec(), VTy->isPixel()); 4935 4936 // For enums, we return the unsigned version of the base type. 4937 if (const EnumType *ETy = T->getAs<EnumType>()) 4938 T = ETy->getDecl()->getIntegerType(); 4939 4940 const BuiltinType *BTy = T->getAs<BuiltinType>(); 4941 assert(BTy && "Unexpected signed integer type"); 4942 switch (BTy->getKind()) { 4943 case BuiltinType::Char_S: 4944 case BuiltinType::SChar: 4945 return UnsignedCharTy; 4946 case BuiltinType::Short: 4947 return UnsignedShortTy; 4948 case BuiltinType::Int: 4949 return UnsignedIntTy; 4950 case BuiltinType::Long: 4951 return UnsignedLongTy; 4952 case BuiltinType::LongLong: 4953 return UnsignedLongLongTy; 4954 case BuiltinType::Int128: 4955 return UnsignedInt128Ty; 4956 default: 4957 assert(0 && "Unexpected signed integer type"); 4958 return QualType(); 4959 } 4960} 4961 4962ExternalASTSource::~ExternalASTSource() { } 4963 4964void ExternalASTSource::PrintStats() { } 4965 4966 4967//===----------------------------------------------------------------------===// 4968// Builtin Type Computation 4969//===----------------------------------------------------------------------===// 4970 4971/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 4972/// pointer over the consumed characters. This returns the resultant type. 4973static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 4974 ASTContext::GetBuiltinTypeError &Error, 4975 bool AllowTypeModifiers = true) { 4976 // Modifiers. 4977 int HowLong = 0; 4978 bool Signed = false, Unsigned = false; 4979 4980 // Read the modifiers first. 4981 bool Done = false; 4982 while (!Done) { 4983 switch (*Str++) { 4984 default: Done = true; --Str; break; 4985 case 'S': 4986 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 4987 assert(!Signed && "Can't use 'S' modifier multiple times!"); 4988 Signed = true; 4989 break; 4990 case 'U': 4991 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 4992 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 4993 Unsigned = true; 4994 break; 4995 case 'L': 4996 assert(HowLong <= 2 && "Can't have LLLL modifier"); 4997 ++HowLong; 4998 break; 4999 } 5000 } 5001 5002 QualType Type; 5003 5004 // Read the base type. 5005 switch (*Str++) { 5006 default: assert(0 && "Unknown builtin type letter!"); 5007 case 'v': 5008 assert(HowLong == 0 && !Signed && !Unsigned && 5009 "Bad modifiers used with 'v'!"); 5010 Type = Context.VoidTy; 5011 break; 5012 case 'f': 5013 assert(HowLong == 0 && !Signed && !Unsigned && 5014 "Bad modifiers used with 'f'!"); 5015 Type = Context.FloatTy; 5016 break; 5017 case 'd': 5018 assert(HowLong < 2 && !Signed && !Unsigned && 5019 "Bad modifiers used with 'd'!"); 5020 if (HowLong) 5021 Type = Context.LongDoubleTy; 5022 else 5023 Type = Context.DoubleTy; 5024 break; 5025 case 's': 5026 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 5027 if (Unsigned) 5028 Type = Context.UnsignedShortTy; 5029 else 5030 Type = Context.ShortTy; 5031 break; 5032 case 'i': 5033 if (HowLong == 3) 5034 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 5035 else if (HowLong == 2) 5036 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 5037 else if (HowLong == 1) 5038 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 5039 else 5040 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 5041 break; 5042 case 'c': 5043 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 5044 if (Signed) 5045 Type = Context.SignedCharTy; 5046 else if (Unsigned) 5047 Type = Context.UnsignedCharTy; 5048 else 5049 Type = Context.CharTy; 5050 break; 5051 case 'b': // boolean 5052 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 5053 Type = Context.BoolTy; 5054 break; 5055 case 'z': // size_t. 5056 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 5057 Type = Context.getSizeType(); 5058 break; 5059 case 'F': 5060 Type = Context.getCFConstantStringType(); 5061 break; 5062 case 'a': 5063 Type = Context.getBuiltinVaListType(); 5064 assert(!Type.isNull() && "builtin va list type not initialized!"); 5065 break; 5066 case 'A': 5067 // This is a "reference" to a va_list; however, what exactly 5068 // this means depends on how va_list is defined. There are two 5069 // different kinds of va_list: ones passed by value, and ones 5070 // passed by reference. An example of a by-value va_list is 5071 // x86, where va_list is a char*. An example of by-ref va_list 5072 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 5073 // we want this argument to be a char*&; for x86-64, we want 5074 // it to be a __va_list_tag*. 5075 Type = Context.getBuiltinVaListType(); 5076 assert(!Type.isNull() && "builtin va list type not initialized!"); 5077 if (Type->isArrayType()) { 5078 Type = Context.getArrayDecayedType(Type); 5079 } else { 5080 Type = Context.getLValueReferenceType(Type); 5081 } 5082 break; 5083 case 'V': { 5084 char *End; 5085 unsigned NumElements = strtoul(Str, &End, 10); 5086 assert(End != Str && "Missing vector size"); 5087 5088 Str = End; 5089 5090 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 5091 // FIXME: Don't know what to do about AltiVec. 5092 Type = Context.getVectorType(ElementType, NumElements, false, false); 5093 break; 5094 } 5095 case 'X': { 5096 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 5097 Type = Context.getComplexType(ElementType); 5098 break; 5099 } 5100 case 'P': 5101 Type = Context.getFILEType(); 5102 if (Type.isNull()) { 5103 Error = ASTContext::GE_Missing_stdio; 5104 return QualType(); 5105 } 5106 break; 5107 case 'J': 5108 if (Signed) 5109 Type = Context.getsigjmp_bufType(); 5110 else 5111 Type = Context.getjmp_bufType(); 5112 5113 if (Type.isNull()) { 5114 Error = ASTContext::GE_Missing_setjmp; 5115 return QualType(); 5116 } 5117 break; 5118 } 5119 5120 if (!AllowTypeModifiers) 5121 return Type; 5122 5123 Done = false; 5124 while (!Done) { 5125 switch (char c = *Str++) { 5126 default: Done = true; --Str; break; 5127 case '*': 5128 case '&': 5129 { 5130 // Both pointers and references can have their pointee types 5131 // qualified with an address space. 5132 char *End; 5133 unsigned AddrSpace = strtoul(Str, &End, 10); 5134 if (End != Str && AddrSpace != 0) { 5135 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 5136 Str = End; 5137 } 5138 } 5139 if (c == '*') 5140 Type = Context.getPointerType(Type); 5141 else 5142 Type = Context.getLValueReferenceType(Type); 5143 break; 5144 // FIXME: There's no way to have a built-in with an rvalue ref arg. 5145 case 'C': 5146 Type = Type.withConst(); 5147 break; 5148 case 'D': 5149 Type = Context.getVolatileType(Type); 5150 break; 5151 } 5152 } 5153 5154 return Type; 5155} 5156 5157/// GetBuiltinType - Return the type for the specified builtin. 5158QualType ASTContext::GetBuiltinType(unsigned id, 5159 GetBuiltinTypeError &Error) { 5160 const char *TypeStr = BuiltinInfo.GetTypeString(id); 5161 5162 llvm::SmallVector<QualType, 8> ArgTypes; 5163 5164 Error = GE_None; 5165 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 5166 if (Error != GE_None) 5167 return QualType(); 5168 while (TypeStr[0] && TypeStr[0] != '.') { 5169 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 5170 if (Error != GE_None) 5171 return QualType(); 5172 5173 // Do array -> pointer decay. The builtin should use the decayed type. 5174 if (Ty->isArrayType()) 5175 Ty = getArrayDecayedType(Ty); 5176 5177 ArgTypes.push_back(Ty); 5178 } 5179 5180 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 5181 "'.' should only occur at end of builtin type list!"); 5182 5183 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 5184 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 5185 return getFunctionNoProtoType(ResType); 5186 5187 // FIXME: Should we create noreturn types? 5188 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 5189 TypeStr[0] == '.', 0, false, false, 0, 0, 5190 FunctionType::ExtInfo()); 5191} 5192 5193QualType 5194ASTContext::UsualArithmeticConversionsType(QualType lhs, QualType rhs) { 5195 // Perform the usual unary conversions. We do this early so that 5196 // integral promotions to "int" can allow us to exit early, in the 5197 // lhs == rhs check. Also, for conversion purposes, we ignore any 5198 // qualifiers. For example, "const float" and "float" are 5199 // equivalent. 5200 if (lhs->isPromotableIntegerType()) 5201 lhs = getPromotedIntegerType(lhs); 5202 else 5203 lhs = lhs.getUnqualifiedType(); 5204 if (rhs->isPromotableIntegerType()) 5205 rhs = getPromotedIntegerType(rhs); 5206 else 5207 rhs = rhs.getUnqualifiedType(); 5208 5209 // If both types are identical, no conversion is needed. 5210 if (lhs == rhs) 5211 return lhs; 5212 5213 // If either side is a non-arithmetic type (e.g. a pointer), we are done. 5214 // The caller can deal with this (e.g. pointer + int). 5215 if (!lhs->isArithmeticType() || !rhs->isArithmeticType()) 5216 return lhs; 5217 5218 // At this point, we have two different arithmetic types. 5219 5220 // Handle complex types first (C99 6.3.1.8p1). 5221 if (lhs->isComplexType() || rhs->isComplexType()) { 5222 // if we have an integer operand, the result is the complex type. 5223 if (rhs->isIntegerType() || rhs->isComplexIntegerType()) { 5224 // convert the rhs to the lhs complex type. 5225 return lhs; 5226 } 5227 if (lhs->isIntegerType() || lhs->isComplexIntegerType()) { 5228 // convert the lhs to the rhs complex type. 5229 return rhs; 5230 } 5231 // This handles complex/complex, complex/float, or float/complex. 5232 // When both operands are complex, the shorter operand is converted to the 5233 // type of the longer, and that is the type of the result. This corresponds 5234 // to what is done when combining two real floating-point operands. 5235 // The fun begins when size promotion occur across type domains. 5236 // From H&S 6.3.4: When one operand is complex and the other is a real 5237 // floating-point type, the less precise type is converted, within it's 5238 // real or complex domain, to the precision of the other type. For example, 5239 // when combining a "long double" with a "double _Complex", the 5240 // "double _Complex" is promoted to "long double _Complex". 5241 int result = getFloatingTypeOrder(lhs, rhs); 5242 5243 if (result > 0) { // The left side is bigger, convert rhs. 5244 rhs = getFloatingTypeOfSizeWithinDomain(lhs, rhs); 5245 } else if (result < 0) { // The right side is bigger, convert lhs. 5246 lhs = getFloatingTypeOfSizeWithinDomain(rhs, lhs); 5247 } 5248 // At this point, lhs and rhs have the same rank/size. Now, make sure the 5249 // domains match. This is a requirement for our implementation, C99 5250 // does not require this promotion. 5251 if (lhs != rhs) { // Domains don't match, we have complex/float mix. 5252 if (lhs->isRealFloatingType()) { // handle "double, _Complex double". 5253 return rhs; 5254 } else { // handle "_Complex double, double". 5255 return lhs; 5256 } 5257 } 5258 return lhs; // The domain/size match exactly. 5259 } 5260 // Now handle "real" floating types (i.e. float, double, long double). 5261 if (lhs->isRealFloatingType() || rhs->isRealFloatingType()) { 5262 // if we have an integer operand, the result is the real floating type. 5263 if (rhs->isIntegerType()) { 5264 // convert rhs to the lhs floating point type. 5265 return lhs; 5266 } 5267 if (rhs->isComplexIntegerType()) { 5268 // convert rhs to the complex floating point type. 5269 return getComplexType(lhs); 5270 } 5271 if (lhs->isIntegerType()) { 5272 // convert lhs to the rhs floating point type. 5273 return rhs; 5274 } 5275 if (lhs->isComplexIntegerType()) { 5276 // convert lhs to the complex floating point type. 5277 return getComplexType(rhs); 5278 } 5279 // We have two real floating types, float/complex combos were handled above. 5280 // Convert the smaller operand to the bigger result. 5281 int result = getFloatingTypeOrder(lhs, rhs); 5282 if (result > 0) // convert the rhs 5283 return lhs; 5284 assert(result < 0 && "illegal float comparison"); 5285 return rhs; // convert the lhs 5286 } 5287 if (lhs->isComplexIntegerType() || rhs->isComplexIntegerType()) { 5288 // Handle GCC complex int extension. 5289 const ComplexType *lhsComplexInt = lhs->getAsComplexIntegerType(); 5290 const ComplexType *rhsComplexInt = rhs->getAsComplexIntegerType(); 5291 5292 if (lhsComplexInt && rhsComplexInt) { 5293 if (getIntegerTypeOrder(lhsComplexInt->getElementType(), 5294 rhsComplexInt->getElementType()) >= 0) 5295 return lhs; // convert the rhs 5296 return rhs; 5297 } else if (lhsComplexInt && rhs->isIntegerType()) { 5298 // convert the rhs to the lhs complex type. 5299 return lhs; 5300 } else if (rhsComplexInt && lhs->isIntegerType()) { 5301 // convert the lhs to the rhs complex type. 5302 return rhs; 5303 } 5304 } 5305 // Finally, we have two differing integer types. 5306 // The rules for this case are in C99 6.3.1.8 5307 int compare = getIntegerTypeOrder(lhs, rhs); 5308 bool lhsSigned = lhs->isSignedIntegerType(), 5309 rhsSigned = rhs->isSignedIntegerType(); 5310 QualType destType; 5311 if (lhsSigned == rhsSigned) { 5312 // Same signedness; use the higher-ranked type 5313 destType = compare >= 0 ? lhs : rhs; 5314 } else if (compare != (lhsSigned ? 1 : -1)) { 5315 // The unsigned type has greater than or equal rank to the 5316 // signed type, so use the unsigned type 5317 destType = lhsSigned ? rhs : lhs; 5318 } else if (getIntWidth(lhs) != getIntWidth(rhs)) { 5319 // The two types are different widths; if we are here, that 5320 // means the signed type is larger than the unsigned type, so 5321 // use the signed type. 5322 destType = lhsSigned ? lhs : rhs; 5323 } else { 5324 // The signed type is higher-ranked than the unsigned type, 5325 // but isn't actually any bigger (like unsigned int and long 5326 // on most 32-bit systems). Use the unsigned type corresponding 5327 // to the signed type. 5328 destType = getCorrespondingUnsignedType(lhsSigned ? lhs : rhs); 5329 } 5330 return destType; 5331} 5332