ASTContext.cpp revision 6deecb0d46bcfd048e651d2db7c4fb0d6407da96
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 38ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 39 const TargetInfo &t, 40 IdentifierTable &idents, SelectorTable &sels, 41 Builtin::Context &builtins, 42 bool FreeMem, unsigned size_reserve) : 43 GlobalNestedNameSpecifier(0), CFConstantStringTypeDecl(0), 44 NSConstantStringTypeDecl(0), 45 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 46 sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 47 SourceMgr(SM), LangOpts(LOpts), FreeMemory(FreeMem), Target(t), 48 Idents(idents), Selectors(sels), 49 BuiltinInfo(builtins), 50 DeclarationNames(*this), 51 ExternalSource(0), PrintingPolicy(LOpts), 52 LastSDM(0, 0) { 53 ObjCIdRedefinitionType = QualType(); 54 ObjCClassRedefinitionType = QualType(); 55 ObjCSelRedefinitionType = QualType(); 56 if (size_reserve > 0) Types.reserve(size_reserve); 57 TUDecl = TranslationUnitDecl::Create(*this); 58 InitBuiltinTypes(); 59} 60 61ASTContext::~ASTContext() { 62 // Release the DenseMaps associated with DeclContext objects. 63 // FIXME: Is this the ideal solution? 64 ReleaseDeclContextMaps(); 65 66 if (!FreeMemory) { 67 // Call all of the deallocation functions. 68 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 69 Deallocations[I].first(Deallocations[I].second); 70 } 71 72 // Release all of the memory associated with overridden C++ methods. 73 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 74 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 75 OM != OMEnd; ++OM) 76 OM->second.Destroy(); 77 78 if (FreeMemory) { 79 // Deallocate all the types. 80 while (!Types.empty()) { 81 Types.back()->Destroy(*this); 82 Types.pop_back(); 83 } 84 85 for (llvm::FoldingSet<ExtQuals>::iterator 86 I = ExtQualNodes.begin(), E = ExtQualNodes.end(); I != E; ) { 87 // Increment in loop to prevent using deallocated memory. 88 Deallocate(&*I++); 89 } 90 91 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 92 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 93 // Increment in loop to prevent using deallocated memory. 94 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 95 R->Destroy(*this); 96 } 97 98 for (llvm::DenseMap<const ObjCContainerDecl*, 99 const ASTRecordLayout*>::iterator 100 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) { 101 // Increment in loop to prevent using deallocated memory. 102 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 103 R->Destroy(*this); 104 } 105 } 106 107 // Destroy nested-name-specifiers. 108 for (llvm::FoldingSet<NestedNameSpecifier>::iterator 109 NNS = NestedNameSpecifiers.begin(), 110 NNSEnd = NestedNameSpecifiers.end(); 111 NNS != NNSEnd; ) { 112 // Increment in loop to prevent using deallocated memory. 113 (*NNS++).Destroy(*this); 114 } 115 116 if (GlobalNestedNameSpecifier) 117 GlobalNestedNameSpecifier->Destroy(*this); 118 119 TUDecl->Destroy(*this); 120} 121 122void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 123 Deallocations.push_back(std::make_pair(Callback, Data)); 124} 125 126void 127ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 128 ExternalSource.reset(Source.take()); 129} 130 131void ASTContext::PrintStats() const { 132 fprintf(stderr, "*** AST Context Stats:\n"); 133 fprintf(stderr, " %d types total.\n", (int)Types.size()); 134 135 unsigned counts[] = { 136#define TYPE(Name, Parent) 0, 137#define ABSTRACT_TYPE(Name, Parent) 138#include "clang/AST/TypeNodes.def" 139 0 // Extra 140 }; 141 142 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 143 Type *T = Types[i]; 144 counts[(unsigned)T->getTypeClass()]++; 145 } 146 147 unsigned Idx = 0; 148 unsigned TotalBytes = 0; 149#define TYPE(Name, Parent) \ 150 if (counts[Idx]) \ 151 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 152 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 153 ++Idx; 154#define ABSTRACT_TYPE(Name, Parent) 155#include "clang/AST/TypeNodes.def" 156 157 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 158 159 if (ExternalSource.get()) { 160 fprintf(stderr, "\n"); 161 ExternalSource->PrintStats(); 162 } 163} 164 165 166void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 167 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 168 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 169 Types.push_back(Ty); 170} 171 172void ASTContext::InitBuiltinTypes() { 173 assert(VoidTy.isNull() && "Context reinitialized?"); 174 175 // C99 6.2.5p19. 176 InitBuiltinType(VoidTy, BuiltinType::Void); 177 178 // C99 6.2.5p2. 179 InitBuiltinType(BoolTy, BuiltinType::Bool); 180 // C99 6.2.5p3. 181 if (LangOpts.CharIsSigned) 182 InitBuiltinType(CharTy, BuiltinType::Char_S); 183 else 184 InitBuiltinType(CharTy, BuiltinType::Char_U); 185 // C99 6.2.5p4. 186 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 187 InitBuiltinType(ShortTy, BuiltinType::Short); 188 InitBuiltinType(IntTy, BuiltinType::Int); 189 InitBuiltinType(LongTy, BuiltinType::Long); 190 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 191 192 // C99 6.2.5p6. 193 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 194 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 195 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 196 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 197 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 198 199 // C99 6.2.5p10. 200 InitBuiltinType(FloatTy, BuiltinType::Float); 201 InitBuiltinType(DoubleTy, BuiltinType::Double); 202 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 203 204 // GNU extension, 128-bit integers. 205 InitBuiltinType(Int128Ty, BuiltinType::Int128); 206 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 207 208 if (LangOpts.CPlusPlus) // C++ 3.9.1p5 209 InitBuiltinType(WCharTy, BuiltinType::WChar); 210 else // C99 211 WCharTy = getFromTargetType(Target.getWCharType()); 212 213 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 214 InitBuiltinType(Char16Ty, BuiltinType::Char16); 215 else // C99 216 Char16Ty = getFromTargetType(Target.getChar16Type()); 217 218 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 219 InitBuiltinType(Char32Ty, BuiltinType::Char32); 220 else // C99 221 Char32Ty = getFromTargetType(Target.getChar32Type()); 222 223 // Placeholder type for functions. 224 InitBuiltinType(OverloadTy, BuiltinType::Overload); 225 226 // Placeholder type for type-dependent expressions whose type is 227 // completely unknown. No code should ever check a type against 228 // DependentTy and users should never see it; however, it is here to 229 // help diagnose failures to properly check for type-dependent 230 // expressions. 231 InitBuiltinType(DependentTy, BuiltinType::Dependent); 232 233 // Placeholder type for C++0x auto declarations whose real type has 234 // not yet been deduced. 235 InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 236 237 // C99 6.2.5p11. 238 FloatComplexTy = getComplexType(FloatTy); 239 DoubleComplexTy = getComplexType(DoubleTy); 240 LongDoubleComplexTy = getComplexType(LongDoubleTy); 241 242 BuiltinVaListType = QualType(); 243 244 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 245 ObjCIdTypedefType = QualType(); 246 ObjCClassTypedefType = QualType(); 247 ObjCSelTypedefType = QualType(); 248 249 // Builtin types for 'id', 'Class', and 'SEL'. 250 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 251 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 252 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 253 254 ObjCConstantStringType = QualType(); 255 256 // void * type 257 VoidPtrTy = getPointerType(VoidTy); 258 259 // nullptr type (C++0x 2.14.7) 260 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 261} 262 263MemberSpecializationInfo * 264ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 265 assert(Var->isStaticDataMember() && "Not a static data member"); 266 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 267 = InstantiatedFromStaticDataMember.find(Var); 268 if (Pos == InstantiatedFromStaticDataMember.end()) 269 return 0; 270 271 return Pos->second; 272} 273 274void 275ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 276 TemplateSpecializationKind TSK) { 277 assert(Inst->isStaticDataMember() && "Not a static data member"); 278 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 279 assert(!InstantiatedFromStaticDataMember[Inst] && 280 "Already noted what static data member was instantiated from"); 281 InstantiatedFromStaticDataMember[Inst] 282 = new (*this) MemberSpecializationInfo(Tmpl, TSK); 283} 284 285NamedDecl * 286ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 287 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 288 = InstantiatedFromUsingDecl.find(UUD); 289 if (Pos == InstantiatedFromUsingDecl.end()) 290 return 0; 291 292 return Pos->second; 293} 294 295void 296ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 297 assert((isa<UsingDecl>(Pattern) || 298 isa<UnresolvedUsingValueDecl>(Pattern) || 299 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 300 "pattern decl is not a using decl"); 301 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 302 InstantiatedFromUsingDecl[Inst] = Pattern; 303} 304 305UsingShadowDecl * 306ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 307 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 308 = InstantiatedFromUsingShadowDecl.find(Inst); 309 if (Pos == InstantiatedFromUsingShadowDecl.end()) 310 return 0; 311 312 return Pos->second; 313} 314 315void 316ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 317 UsingShadowDecl *Pattern) { 318 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 319 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 320} 321 322FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 323 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 324 = InstantiatedFromUnnamedFieldDecl.find(Field); 325 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 326 return 0; 327 328 return Pos->second; 329} 330 331void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 332 FieldDecl *Tmpl) { 333 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 334 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 335 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 336 "Already noted what unnamed field was instantiated from"); 337 338 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 339} 340 341ASTContext::overridden_cxx_method_iterator 342ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 343 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 344 = OverriddenMethods.find(Method); 345 if (Pos == OverriddenMethods.end()) 346 return 0; 347 348 return Pos->second.begin(); 349} 350 351ASTContext::overridden_cxx_method_iterator 352ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 353 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 354 = OverriddenMethods.find(Method); 355 if (Pos == OverriddenMethods.end()) 356 return 0; 357 358 return Pos->second.end(); 359} 360 361void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 362 const CXXMethodDecl *Overridden) { 363 OverriddenMethods[Method].push_back(Overridden); 364} 365 366namespace { 367 class BeforeInTranslationUnit 368 : std::binary_function<SourceRange, SourceRange, bool> { 369 SourceManager *SourceMgr; 370 371 public: 372 explicit BeforeInTranslationUnit(SourceManager *SM) : SourceMgr(SM) { } 373 374 bool operator()(SourceRange X, SourceRange Y) { 375 return SourceMgr->isBeforeInTranslationUnit(X.getBegin(), Y.getBegin()); 376 } 377 }; 378} 379 380//===----------------------------------------------------------------------===// 381// Type Sizing and Analysis 382//===----------------------------------------------------------------------===// 383 384/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 385/// scalar floating point type. 386const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 387 const BuiltinType *BT = T->getAs<BuiltinType>(); 388 assert(BT && "Not a floating point type!"); 389 switch (BT->getKind()) { 390 default: assert(0 && "Not a floating point type!"); 391 case BuiltinType::Float: return Target.getFloatFormat(); 392 case BuiltinType::Double: return Target.getDoubleFormat(); 393 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 394 } 395} 396 397/// getDeclAlign - Return a conservative estimate of the alignment of the 398/// specified decl. Note that bitfields do not have a valid alignment, so 399/// this method will assert on them. 400/// If @p RefAsPointee, references are treated like their underlying type 401/// (for alignof), else they're treated like pointers (for CodeGen). 402CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) { 403 unsigned Align = Target.getCharWidth(); 404 405 if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 406 Align = std::max(Align, AA->getMaxAlignment()); 407 408 if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 409 QualType T = VD->getType(); 410 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 411 if (RefAsPointee) 412 T = RT->getPointeeType(); 413 else 414 T = getPointerType(RT->getPointeeType()); 415 } 416 if (!T->isIncompleteType() && !T->isFunctionType()) { 417 unsigned MinWidth = Target.getLargeArrayMinWidth(); 418 unsigned ArrayAlign = Target.getLargeArrayAlign(); 419 if (isa<VariableArrayType>(T) && MinWidth != 0) 420 Align = std::max(Align, ArrayAlign); 421 if (ConstantArrayType *CT = dyn_cast<ConstantArrayType>(T)) { 422 unsigned Size = getTypeSize(CT); 423 if (MinWidth != 0 && MinWidth <= Size) 424 Align = std::max(Align, ArrayAlign); 425 } 426 // Incomplete or function types default to 1. 427 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 428 T = cast<ArrayType>(T)->getElementType(); 429 430 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 431 } 432 if (const FieldDecl *FD = dyn_cast<FieldDecl>(VD)) { 433 // In the case of a field in a packed struct, we want the minimum 434 // of the alignment of the field and the alignment of the struct. 435 Align = std::min(Align, 436 getPreferredTypeAlign(FD->getParent()->getTypeForDecl())); 437 } 438 } 439 440 return CharUnits::fromQuantity(Align / Target.getCharWidth()); 441} 442 443std::pair<CharUnits, CharUnits> 444ASTContext::getTypeInfoInChars(const Type *T) { 445 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 446 return std::make_pair(CharUnits::fromQuantity(Info.first / getCharWidth()), 447 CharUnits::fromQuantity(Info.second / getCharWidth())); 448} 449 450std::pair<CharUnits, CharUnits> 451ASTContext::getTypeInfoInChars(QualType T) { 452 return getTypeInfoInChars(T.getTypePtr()); 453} 454 455/// getTypeSize - Return the size of the specified type, in bits. This method 456/// does not work on incomplete types. 457/// 458/// FIXME: Pointers into different addr spaces could have different sizes and 459/// alignment requirements: getPointerInfo should take an AddrSpace, this 460/// should take a QualType, &c. 461std::pair<uint64_t, unsigned> 462ASTContext::getTypeInfo(const Type *T) { 463 uint64_t Width=0; 464 unsigned Align=8; 465 switch (T->getTypeClass()) { 466#define TYPE(Class, Base) 467#define ABSTRACT_TYPE(Class, Base) 468#define NON_CANONICAL_TYPE(Class, Base) 469#define DEPENDENT_TYPE(Class, Base) case Type::Class: 470#include "clang/AST/TypeNodes.def" 471 assert(false && "Should not see dependent types"); 472 break; 473 474 case Type::FunctionNoProto: 475 case Type::FunctionProto: 476 // GCC extension: alignof(function) = 32 bits 477 Width = 0; 478 Align = 32; 479 break; 480 481 case Type::IncompleteArray: 482 case Type::VariableArray: 483 Width = 0; 484 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 485 break; 486 487 case Type::ConstantArray: { 488 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 489 490 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 491 Width = EltInfo.first*CAT->getSize().getZExtValue(); 492 Align = EltInfo.second; 493 break; 494 } 495 case Type::ExtVector: 496 case Type::Vector: { 497 const VectorType *VT = cast<VectorType>(T); 498 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 499 Width = EltInfo.first*VT->getNumElements(); 500 Align = Width; 501 // If the alignment is not a power of 2, round up to the next power of 2. 502 // This happens for non-power-of-2 length vectors. 503 if (Align & (Align-1)) { 504 Align = llvm::NextPowerOf2(Align); 505 Width = llvm::RoundUpToAlignment(Width, Align); 506 } 507 break; 508 } 509 510 case Type::Builtin: 511 switch (cast<BuiltinType>(T)->getKind()) { 512 default: assert(0 && "Unknown builtin type!"); 513 case BuiltinType::Void: 514 // GCC extension: alignof(void) = 8 bits. 515 Width = 0; 516 Align = 8; 517 break; 518 519 case BuiltinType::Bool: 520 Width = Target.getBoolWidth(); 521 Align = Target.getBoolAlign(); 522 break; 523 case BuiltinType::Char_S: 524 case BuiltinType::Char_U: 525 case BuiltinType::UChar: 526 case BuiltinType::SChar: 527 Width = Target.getCharWidth(); 528 Align = Target.getCharAlign(); 529 break; 530 case BuiltinType::WChar: 531 Width = Target.getWCharWidth(); 532 Align = Target.getWCharAlign(); 533 break; 534 case BuiltinType::Char16: 535 Width = Target.getChar16Width(); 536 Align = Target.getChar16Align(); 537 break; 538 case BuiltinType::Char32: 539 Width = Target.getChar32Width(); 540 Align = Target.getChar32Align(); 541 break; 542 case BuiltinType::UShort: 543 case BuiltinType::Short: 544 Width = Target.getShortWidth(); 545 Align = Target.getShortAlign(); 546 break; 547 case BuiltinType::UInt: 548 case BuiltinType::Int: 549 Width = Target.getIntWidth(); 550 Align = Target.getIntAlign(); 551 break; 552 case BuiltinType::ULong: 553 case BuiltinType::Long: 554 Width = Target.getLongWidth(); 555 Align = Target.getLongAlign(); 556 break; 557 case BuiltinType::ULongLong: 558 case BuiltinType::LongLong: 559 Width = Target.getLongLongWidth(); 560 Align = Target.getLongLongAlign(); 561 break; 562 case BuiltinType::Int128: 563 case BuiltinType::UInt128: 564 Width = 128; 565 Align = 128; // int128_t is 128-bit aligned on all targets. 566 break; 567 case BuiltinType::Float: 568 Width = Target.getFloatWidth(); 569 Align = Target.getFloatAlign(); 570 break; 571 case BuiltinType::Double: 572 Width = Target.getDoubleWidth(); 573 Align = Target.getDoubleAlign(); 574 break; 575 case BuiltinType::LongDouble: 576 Width = Target.getLongDoubleWidth(); 577 Align = Target.getLongDoubleAlign(); 578 break; 579 case BuiltinType::NullPtr: 580 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 581 Align = Target.getPointerAlign(0); // == sizeof(void*) 582 break; 583 } 584 break; 585 case Type::ObjCObjectPointer: 586 Width = Target.getPointerWidth(0); 587 Align = Target.getPointerAlign(0); 588 break; 589 case Type::BlockPointer: { 590 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 591 Width = Target.getPointerWidth(AS); 592 Align = Target.getPointerAlign(AS); 593 break; 594 } 595 case Type::LValueReference: 596 case Type::RValueReference: { 597 // alignof and sizeof should never enter this code path here, so we go 598 // the pointer route. 599 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 600 Width = Target.getPointerWidth(AS); 601 Align = Target.getPointerAlign(AS); 602 break; 603 } 604 case Type::Pointer: { 605 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 606 Width = Target.getPointerWidth(AS); 607 Align = Target.getPointerAlign(AS); 608 break; 609 } 610 case Type::MemberPointer: { 611 QualType Pointee = cast<MemberPointerType>(T)->getPointeeType(); 612 std::pair<uint64_t, unsigned> PtrDiffInfo = 613 getTypeInfo(getPointerDiffType()); 614 Width = PtrDiffInfo.first; 615 if (Pointee->isFunctionType()) 616 Width *= 2; 617 Align = PtrDiffInfo.second; 618 break; 619 } 620 case Type::Complex: { 621 // Complex types have the same alignment as their elements, but twice the 622 // size. 623 std::pair<uint64_t, unsigned> EltInfo = 624 getTypeInfo(cast<ComplexType>(T)->getElementType()); 625 Width = EltInfo.first*2; 626 Align = EltInfo.second; 627 break; 628 } 629 case Type::ObjCObject: 630 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 631 case Type::ObjCInterface: { 632 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 633 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 634 Width = Layout.getSize(); 635 Align = Layout.getAlignment(); 636 break; 637 } 638 case Type::Record: 639 case Type::Enum: { 640 const TagType *TT = cast<TagType>(T); 641 642 if (TT->getDecl()->isInvalidDecl()) { 643 Width = 1; 644 Align = 1; 645 break; 646 } 647 648 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 649 return getTypeInfo(ET->getDecl()->getIntegerType()); 650 651 const RecordType *RT = cast<RecordType>(TT); 652 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 653 Width = Layout.getSize(); 654 Align = Layout.getAlignment(); 655 break; 656 } 657 658 case Type::SubstTemplateTypeParm: 659 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 660 getReplacementType().getTypePtr()); 661 662 case Type::Typedef: { 663 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 664 if (const AlignedAttr *Aligned = Typedef->getAttr<AlignedAttr>()) { 665 Align = std::max(Aligned->getMaxAlignment(), 666 getTypeAlign(Typedef->getUnderlyingType().getTypePtr())); 667 Width = getTypeSize(Typedef->getUnderlyingType().getTypePtr()); 668 } else 669 return getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 670 break; 671 } 672 673 case Type::TypeOfExpr: 674 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 675 .getTypePtr()); 676 677 case Type::TypeOf: 678 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 679 680 case Type::Decltype: 681 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 682 .getTypePtr()); 683 684 case Type::Elaborated: 685 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 686 687 case Type::TemplateSpecialization: 688 assert(getCanonicalType(T) != T && 689 "Cannot request the size of a dependent type"); 690 // FIXME: this is likely to be wrong once we support template 691 // aliases, since a template alias could refer to a typedef that 692 // has an __aligned__ attribute on it. 693 return getTypeInfo(getCanonicalType(T)); 694 } 695 696 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 697 return std::make_pair(Width, Align); 698} 699 700/// getTypeSizeInChars - Return the size of the specified type, in characters. 701/// This method does not work on incomplete types. 702CharUnits ASTContext::getTypeSizeInChars(QualType T) { 703 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 704} 705CharUnits ASTContext::getTypeSizeInChars(const Type *T) { 706 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 707} 708 709/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 710/// characters. This method does not work on incomplete types. 711CharUnits ASTContext::getTypeAlignInChars(QualType T) { 712 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 713} 714CharUnits ASTContext::getTypeAlignInChars(const Type *T) { 715 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 716} 717 718/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 719/// type for the current target in bits. This can be different than the ABI 720/// alignment in cases where it is beneficial for performance to overalign 721/// a data type. 722unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 723 unsigned ABIAlign = getTypeAlign(T); 724 725 // Double and long long should be naturally aligned if possible. 726 if (const ComplexType* CT = T->getAs<ComplexType>()) 727 T = CT->getElementType().getTypePtr(); 728 if (T->isSpecificBuiltinType(BuiltinType::Double) || 729 T->isSpecificBuiltinType(BuiltinType::LongLong)) 730 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 731 732 return ABIAlign; 733} 734 735static void CollectLocalObjCIvars(ASTContext *Ctx, 736 const ObjCInterfaceDecl *OI, 737 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 738 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 739 E = OI->ivar_end(); I != E; ++I) { 740 ObjCIvarDecl *IVDecl = *I; 741 if (!IVDecl->isInvalidDecl()) 742 Fields.push_back(cast<FieldDecl>(IVDecl)); 743 } 744} 745 746void ASTContext::CollectObjCIvars(const ObjCInterfaceDecl *OI, 747 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 748 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 749 CollectObjCIvars(SuperClass, Fields); 750 CollectLocalObjCIvars(this, OI, Fields); 751} 752 753/// ShallowCollectObjCIvars - 754/// Collect all ivars, including those synthesized, in the current class. 755/// 756void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 757 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 758 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 759 E = OI->ivar_end(); I != E; ++I) { 760 Ivars.push_back(*I); 761 } 762 763 CollectNonClassIvars(OI, Ivars); 764} 765 766/// CollectNonClassIvars - 767/// This routine collects all other ivars which are not declared in the class. 768/// This includes synthesized ivars (via @synthesize) and those in 769// class's @implementation. 770/// 771void ASTContext::CollectNonClassIvars(const ObjCInterfaceDecl *OI, 772 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 773 // Find ivars declared in class extension. 774 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) { 775 for (ObjCCategoryDecl::ivar_iterator I = CDecl->ivar_begin(), 776 E = CDecl->ivar_end(); I != E; ++I) { 777 Ivars.push_back(*I); 778 } 779 } 780 781 // Also add any ivar defined in this class's implementation. This 782 // includes synthesized ivars. 783 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) { 784 for (ObjCImplementationDecl::ivar_iterator I = ImplDecl->ivar_begin(), 785 E = ImplDecl->ivar_end(); I != E; ++I) 786 Ivars.push_back(*I); 787 } 788} 789 790/// CollectInheritedProtocols - Collect all protocols in current class and 791/// those inherited by it. 792void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 793 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 794 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 795 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 796 PE = OI->protocol_end(); P != PE; ++P) { 797 ObjCProtocolDecl *Proto = (*P); 798 Protocols.insert(Proto); 799 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 800 PE = Proto->protocol_end(); P != PE; ++P) { 801 Protocols.insert(*P); 802 CollectInheritedProtocols(*P, Protocols); 803 } 804 } 805 806 // Categories of this Interface. 807 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 808 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 809 CollectInheritedProtocols(CDeclChain, Protocols); 810 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 811 while (SD) { 812 CollectInheritedProtocols(SD, Protocols); 813 SD = SD->getSuperClass(); 814 } 815 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 816 for (ObjCInterfaceDecl::protocol_iterator P = OC->protocol_begin(), 817 PE = OC->protocol_end(); P != PE; ++P) { 818 ObjCProtocolDecl *Proto = (*P); 819 Protocols.insert(Proto); 820 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 821 PE = Proto->protocol_end(); P != PE; ++P) 822 CollectInheritedProtocols(*P, Protocols); 823 } 824 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 825 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 826 PE = OP->protocol_end(); P != PE; ++P) { 827 ObjCProtocolDecl *Proto = (*P); 828 Protocols.insert(Proto); 829 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 830 PE = Proto->protocol_end(); P != PE; ++P) 831 CollectInheritedProtocols(*P, Protocols); 832 } 833 } 834} 835 836unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) { 837 unsigned count = 0; 838 // Count ivars declared in class extension. 839 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) 840 count += CDecl->ivar_size(); 841 842 // Count ivar defined in this class's implementation. This 843 // includes synthesized ivars. 844 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 845 count += ImplDecl->ivar_size(); 846 847 return count; 848} 849 850/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 851ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 852 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 853 I = ObjCImpls.find(D); 854 if (I != ObjCImpls.end()) 855 return cast<ObjCImplementationDecl>(I->second); 856 return 0; 857} 858/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 859ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 860 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 861 I = ObjCImpls.find(D); 862 if (I != ObjCImpls.end()) 863 return cast<ObjCCategoryImplDecl>(I->second); 864 return 0; 865} 866 867/// \brief Set the implementation of ObjCInterfaceDecl. 868void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 869 ObjCImplementationDecl *ImplD) { 870 assert(IFaceD && ImplD && "Passed null params"); 871 ObjCImpls[IFaceD] = ImplD; 872} 873/// \brief Set the implementation of ObjCCategoryDecl. 874void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 875 ObjCCategoryImplDecl *ImplD) { 876 assert(CatD && ImplD && "Passed null params"); 877 ObjCImpls[CatD] = ImplD; 878} 879 880/// \brief Allocate an uninitialized TypeSourceInfo. 881/// 882/// The caller should initialize the memory held by TypeSourceInfo using 883/// the TypeLoc wrappers. 884/// 885/// \param T the type that will be the basis for type source info. This type 886/// should refer to how the declarator was written in source code, not to 887/// what type semantic analysis resolved the declarator to. 888TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 889 unsigned DataSize) { 890 if (!DataSize) 891 DataSize = TypeLoc::getFullDataSizeForType(T); 892 else 893 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 894 "incorrect data size provided to CreateTypeSourceInfo!"); 895 896 TypeSourceInfo *TInfo = 897 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 898 new (TInfo) TypeSourceInfo(T); 899 return TInfo; 900} 901 902TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 903 SourceLocation L) { 904 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 905 DI->getTypeLoc().initialize(L); 906 return DI; 907} 908 909const ASTRecordLayout & 910ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 911 return getObjCLayout(D, 0); 912} 913 914const ASTRecordLayout & 915ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 916 return getObjCLayout(D->getClassInterface(), D); 917} 918 919//===----------------------------------------------------------------------===// 920// Type creation/memoization methods 921//===----------------------------------------------------------------------===// 922 923QualType ASTContext::getExtQualType(const Type *TypeNode, Qualifiers Quals) { 924 unsigned Fast = Quals.getFastQualifiers(); 925 Quals.removeFastQualifiers(); 926 927 // Check if we've already instantiated this type. 928 llvm::FoldingSetNodeID ID; 929 ExtQuals::Profile(ID, TypeNode, Quals); 930 void *InsertPos = 0; 931 if (ExtQuals *EQ = ExtQualNodes.FindNodeOrInsertPos(ID, InsertPos)) { 932 assert(EQ->getQualifiers() == Quals); 933 QualType T = QualType(EQ, Fast); 934 return T; 935 } 936 937 ExtQuals *New = new (*this, TypeAlignment) ExtQuals(*this, TypeNode, Quals); 938 ExtQualNodes.InsertNode(New, InsertPos); 939 QualType T = QualType(New, Fast); 940 return T; 941} 942 943QualType ASTContext::getVolatileType(QualType T) { 944 QualType CanT = getCanonicalType(T); 945 if (CanT.isVolatileQualified()) return T; 946 947 QualifierCollector Quals; 948 const Type *TypeNode = Quals.strip(T); 949 Quals.addVolatile(); 950 951 return getExtQualType(TypeNode, Quals); 952} 953 954QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 955 QualType CanT = getCanonicalType(T); 956 if (CanT.getAddressSpace() == AddressSpace) 957 return T; 958 959 // If we are composing extended qualifiers together, merge together 960 // into one ExtQuals node. 961 QualifierCollector Quals; 962 const Type *TypeNode = Quals.strip(T); 963 964 // If this type already has an address space specified, it cannot get 965 // another one. 966 assert(!Quals.hasAddressSpace() && 967 "Type cannot be in multiple addr spaces!"); 968 Quals.addAddressSpace(AddressSpace); 969 970 return getExtQualType(TypeNode, Quals); 971} 972 973QualType ASTContext::getObjCGCQualType(QualType T, 974 Qualifiers::GC GCAttr) { 975 QualType CanT = getCanonicalType(T); 976 if (CanT.getObjCGCAttr() == GCAttr) 977 return T; 978 979 if (T->isPointerType()) { 980 QualType Pointee = T->getAs<PointerType>()->getPointeeType(); 981 if (Pointee->isAnyPointerType()) { 982 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 983 return getPointerType(ResultType); 984 } 985 } 986 987 // If we are composing extended qualifiers together, merge together 988 // into one ExtQuals node. 989 QualifierCollector Quals; 990 const Type *TypeNode = Quals.strip(T); 991 992 // If this type already has an ObjCGC specified, it cannot get 993 // another one. 994 assert(!Quals.hasObjCGCAttr() && 995 "Type cannot have multiple ObjCGCs!"); 996 Quals.addObjCGCAttr(GCAttr); 997 998 return getExtQualType(TypeNode, Quals); 999} 1000 1001static QualType getExtFunctionType(ASTContext& Context, QualType T, 1002 const FunctionType::ExtInfo &Info) { 1003 QualType ResultType; 1004 if (const PointerType *Pointer = T->getAs<PointerType>()) { 1005 QualType Pointee = Pointer->getPointeeType(); 1006 ResultType = getExtFunctionType(Context, Pointee, Info); 1007 if (ResultType == Pointee) 1008 return T; 1009 1010 ResultType = Context.getPointerType(ResultType); 1011 } else if (const BlockPointerType *BlockPointer 1012 = T->getAs<BlockPointerType>()) { 1013 QualType Pointee = BlockPointer->getPointeeType(); 1014 ResultType = getExtFunctionType(Context, Pointee, Info); 1015 if (ResultType == Pointee) 1016 return T; 1017 1018 ResultType = Context.getBlockPointerType(ResultType); 1019 } else if (const FunctionType *F = T->getAs<FunctionType>()) { 1020 if (F->getExtInfo() == Info) 1021 return T; 1022 1023 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(F)) { 1024 ResultType = Context.getFunctionNoProtoType(FNPT->getResultType(), 1025 Info); 1026 } else { 1027 const FunctionProtoType *FPT = cast<FunctionProtoType>(F); 1028 ResultType 1029 = Context.getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1030 FPT->getNumArgs(), FPT->isVariadic(), 1031 FPT->getTypeQuals(), 1032 FPT->hasExceptionSpec(), 1033 FPT->hasAnyExceptionSpec(), 1034 FPT->getNumExceptions(), 1035 FPT->exception_begin(), 1036 Info); 1037 } 1038 } else 1039 return T; 1040 1041 return Context.getQualifiedType(ResultType, T.getLocalQualifiers()); 1042} 1043 1044QualType ASTContext::getNoReturnType(QualType T, bool AddNoReturn) { 1045 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1046 return getExtFunctionType(*this, T, 1047 Info.withNoReturn(AddNoReturn)); 1048} 1049 1050QualType ASTContext::getCallConvType(QualType T, CallingConv CallConv) { 1051 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1052 return getExtFunctionType(*this, T, 1053 Info.withCallingConv(CallConv)); 1054} 1055 1056QualType ASTContext::getRegParmType(QualType T, unsigned RegParm) { 1057 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1058 return getExtFunctionType(*this, T, 1059 Info.withRegParm(RegParm)); 1060} 1061 1062/// getComplexType - Return the uniqued reference to the type for a complex 1063/// number with the specified element type. 1064QualType ASTContext::getComplexType(QualType T) { 1065 // Unique pointers, to guarantee there is only one pointer of a particular 1066 // structure. 1067 llvm::FoldingSetNodeID ID; 1068 ComplexType::Profile(ID, T); 1069 1070 void *InsertPos = 0; 1071 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1072 return QualType(CT, 0); 1073 1074 // If the pointee type isn't canonical, this won't be a canonical type either, 1075 // so fill in the canonical type field. 1076 QualType Canonical; 1077 if (!T.isCanonical()) { 1078 Canonical = getComplexType(getCanonicalType(T)); 1079 1080 // Get the new insert position for the node we care about. 1081 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1082 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1083 } 1084 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1085 Types.push_back(New); 1086 ComplexTypes.InsertNode(New, InsertPos); 1087 return QualType(New, 0); 1088} 1089 1090/// getPointerType - Return the uniqued reference to the type for a pointer to 1091/// the specified type. 1092QualType ASTContext::getPointerType(QualType T) { 1093 // Unique pointers, to guarantee there is only one pointer of a particular 1094 // structure. 1095 llvm::FoldingSetNodeID ID; 1096 PointerType::Profile(ID, T); 1097 1098 void *InsertPos = 0; 1099 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1100 return QualType(PT, 0); 1101 1102 // If the pointee type isn't canonical, this won't be a canonical type either, 1103 // so fill in the canonical type field. 1104 QualType Canonical; 1105 if (!T.isCanonical()) { 1106 Canonical = getPointerType(getCanonicalType(T)); 1107 1108 // Get the new insert position for the node we care about. 1109 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1110 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1111 } 1112 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1113 Types.push_back(New); 1114 PointerTypes.InsertNode(New, InsertPos); 1115 return QualType(New, 0); 1116} 1117 1118/// getBlockPointerType - Return the uniqued reference to the type for 1119/// a pointer to the specified block. 1120QualType ASTContext::getBlockPointerType(QualType T) { 1121 assert(T->isFunctionType() && "block of function types only"); 1122 // Unique pointers, to guarantee there is only one block of a particular 1123 // structure. 1124 llvm::FoldingSetNodeID ID; 1125 BlockPointerType::Profile(ID, T); 1126 1127 void *InsertPos = 0; 1128 if (BlockPointerType *PT = 1129 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1130 return QualType(PT, 0); 1131 1132 // If the block pointee type isn't canonical, this won't be a canonical 1133 // type either so fill in the canonical type field. 1134 QualType Canonical; 1135 if (!T.isCanonical()) { 1136 Canonical = getBlockPointerType(getCanonicalType(T)); 1137 1138 // Get the new insert position for the node we care about. 1139 BlockPointerType *NewIP = 1140 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1141 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1142 } 1143 BlockPointerType *New 1144 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1145 Types.push_back(New); 1146 BlockPointerTypes.InsertNode(New, InsertPos); 1147 return QualType(New, 0); 1148} 1149 1150/// getLValueReferenceType - Return the uniqued reference to the type for an 1151/// lvalue reference to the specified type. 1152QualType ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) { 1153 // Unique pointers, to guarantee there is only one pointer of a particular 1154 // structure. 1155 llvm::FoldingSetNodeID ID; 1156 ReferenceType::Profile(ID, T, SpelledAsLValue); 1157 1158 void *InsertPos = 0; 1159 if (LValueReferenceType *RT = 1160 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1161 return QualType(RT, 0); 1162 1163 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1164 1165 // If the referencee type isn't canonical, this won't be a canonical type 1166 // either, so fill in the canonical type field. 1167 QualType Canonical; 1168 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1169 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1170 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1171 1172 // Get the new insert position for the node we care about. 1173 LValueReferenceType *NewIP = 1174 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1175 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1176 } 1177 1178 LValueReferenceType *New 1179 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1180 SpelledAsLValue); 1181 Types.push_back(New); 1182 LValueReferenceTypes.InsertNode(New, InsertPos); 1183 1184 return QualType(New, 0); 1185} 1186 1187/// getRValueReferenceType - Return the uniqued reference to the type for an 1188/// rvalue reference to the specified type. 1189QualType ASTContext::getRValueReferenceType(QualType T) { 1190 // Unique pointers, to guarantee there is only one pointer of a particular 1191 // structure. 1192 llvm::FoldingSetNodeID ID; 1193 ReferenceType::Profile(ID, T, false); 1194 1195 void *InsertPos = 0; 1196 if (RValueReferenceType *RT = 1197 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1198 return QualType(RT, 0); 1199 1200 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1201 1202 // If the referencee type isn't canonical, this won't be a canonical type 1203 // either, so fill in the canonical type field. 1204 QualType Canonical; 1205 if (InnerRef || !T.isCanonical()) { 1206 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1207 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1208 1209 // Get the new insert position for the node we care about. 1210 RValueReferenceType *NewIP = 1211 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1212 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1213 } 1214 1215 RValueReferenceType *New 1216 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1217 Types.push_back(New); 1218 RValueReferenceTypes.InsertNode(New, InsertPos); 1219 return QualType(New, 0); 1220} 1221 1222/// getMemberPointerType - Return the uniqued reference to the type for a 1223/// member pointer to the specified type, in the specified class. 1224QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) { 1225 // Unique pointers, to guarantee there is only one pointer of a particular 1226 // structure. 1227 llvm::FoldingSetNodeID ID; 1228 MemberPointerType::Profile(ID, T, Cls); 1229 1230 void *InsertPos = 0; 1231 if (MemberPointerType *PT = 1232 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1233 return QualType(PT, 0); 1234 1235 // If the pointee or class type isn't canonical, this won't be a canonical 1236 // type either, so fill in the canonical type field. 1237 QualType Canonical; 1238 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1239 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1240 1241 // Get the new insert position for the node we care about. 1242 MemberPointerType *NewIP = 1243 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1244 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1245 } 1246 MemberPointerType *New 1247 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1248 Types.push_back(New); 1249 MemberPointerTypes.InsertNode(New, InsertPos); 1250 return QualType(New, 0); 1251} 1252 1253/// getConstantArrayType - Return the unique reference to the type for an 1254/// array of the specified element type. 1255QualType ASTContext::getConstantArrayType(QualType EltTy, 1256 const llvm::APInt &ArySizeIn, 1257 ArrayType::ArraySizeModifier ASM, 1258 unsigned EltTypeQuals) { 1259 assert((EltTy->isDependentType() || 1260 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1261 "Constant array of VLAs is illegal!"); 1262 1263 // Convert the array size into a canonical width matching the pointer size for 1264 // the target. 1265 llvm::APInt ArySize(ArySizeIn); 1266 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1267 1268 llvm::FoldingSetNodeID ID; 1269 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1270 1271 void *InsertPos = 0; 1272 if (ConstantArrayType *ATP = 1273 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1274 return QualType(ATP, 0); 1275 1276 // If the element type isn't canonical, this won't be a canonical type either, 1277 // so fill in the canonical type field. 1278 QualType Canonical; 1279 if (!EltTy.isCanonical()) { 1280 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1281 ASM, EltTypeQuals); 1282 // Get the new insert position for the node we care about. 1283 ConstantArrayType *NewIP = 1284 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1285 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1286 } 1287 1288 ConstantArrayType *New = new(*this,TypeAlignment) 1289 ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1290 ConstantArrayTypes.InsertNode(New, InsertPos); 1291 Types.push_back(New); 1292 return QualType(New, 0); 1293} 1294 1295/// getVariableArrayType - Returns a non-unique reference to the type for a 1296/// variable array of the specified element type. 1297QualType ASTContext::getVariableArrayType(QualType EltTy, 1298 Expr *NumElts, 1299 ArrayType::ArraySizeModifier ASM, 1300 unsigned EltTypeQuals, 1301 SourceRange Brackets) { 1302 // Since we don't unique expressions, it isn't possible to unique VLA's 1303 // that have an expression provided for their size. 1304 QualType CanonType; 1305 1306 if (!EltTy.isCanonical()) { 1307 if (NumElts) 1308 NumElts->Retain(); 1309 CanonType = getVariableArrayType(getCanonicalType(EltTy), NumElts, ASM, 1310 EltTypeQuals, Brackets); 1311 } 1312 1313 VariableArrayType *New = new(*this, TypeAlignment) 1314 VariableArrayType(EltTy, CanonType, NumElts, ASM, EltTypeQuals, Brackets); 1315 1316 VariableArrayTypes.push_back(New); 1317 Types.push_back(New); 1318 return QualType(New, 0); 1319} 1320 1321/// getDependentSizedArrayType - Returns a non-unique reference to 1322/// the type for a dependently-sized array of the specified element 1323/// type. 1324QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1325 Expr *NumElts, 1326 ArrayType::ArraySizeModifier ASM, 1327 unsigned EltTypeQuals, 1328 SourceRange Brackets) { 1329 assert((!NumElts || NumElts->isTypeDependent() || 1330 NumElts->isValueDependent()) && 1331 "Size must be type- or value-dependent!"); 1332 1333 void *InsertPos = 0; 1334 DependentSizedArrayType *Canon = 0; 1335 llvm::FoldingSetNodeID ID; 1336 1337 if (NumElts) { 1338 // Dependently-sized array types that do not have a specified 1339 // number of elements will have their sizes deduced from an 1340 // initializer. 1341 DependentSizedArrayType::Profile(ID, *this, getCanonicalType(EltTy), ASM, 1342 EltTypeQuals, NumElts); 1343 1344 Canon = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1345 } 1346 1347 DependentSizedArrayType *New; 1348 if (Canon) { 1349 // We already have a canonical version of this array type; use it as 1350 // the canonical type for a newly-built type. 1351 New = new (*this, TypeAlignment) 1352 DependentSizedArrayType(*this, EltTy, QualType(Canon, 0), 1353 NumElts, ASM, EltTypeQuals, Brackets); 1354 } else { 1355 QualType CanonEltTy = getCanonicalType(EltTy); 1356 if (CanonEltTy == EltTy) { 1357 New = new (*this, TypeAlignment) 1358 DependentSizedArrayType(*this, EltTy, QualType(), 1359 NumElts, ASM, EltTypeQuals, Brackets); 1360 1361 if (NumElts) { 1362 DependentSizedArrayType *CanonCheck 1363 = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1364 assert(!CanonCheck && "Dependent-sized canonical array type broken"); 1365 (void)CanonCheck; 1366 DependentSizedArrayTypes.InsertNode(New, InsertPos); 1367 } 1368 } else { 1369 QualType Canon = getDependentSizedArrayType(CanonEltTy, NumElts, 1370 ASM, EltTypeQuals, 1371 SourceRange()); 1372 New = new (*this, TypeAlignment) 1373 DependentSizedArrayType(*this, EltTy, Canon, 1374 NumElts, ASM, EltTypeQuals, Brackets); 1375 } 1376 } 1377 1378 Types.push_back(New); 1379 return QualType(New, 0); 1380} 1381 1382QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1383 ArrayType::ArraySizeModifier ASM, 1384 unsigned EltTypeQuals) { 1385 llvm::FoldingSetNodeID ID; 1386 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1387 1388 void *InsertPos = 0; 1389 if (IncompleteArrayType *ATP = 1390 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1391 return QualType(ATP, 0); 1392 1393 // If the element type isn't canonical, this won't be a canonical type 1394 // either, so fill in the canonical type field. 1395 QualType Canonical; 1396 1397 if (!EltTy.isCanonical()) { 1398 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1399 ASM, EltTypeQuals); 1400 1401 // Get the new insert position for the node we care about. 1402 IncompleteArrayType *NewIP = 1403 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1404 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1405 } 1406 1407 IncompleteArrayType *New = new (*this, TypeAlignment) 1408 IncompleteArrayType(EltTy, Canonical, ASM, EltTypeQuals); 1409 1410 IncompleteArrayTypes.InsertNode(New, InsertPos); 1411 Types.push_back(New); 1412 return QualType(New, 0); 1413} 1414 1415/// getVectorType - Return the unique reference to a vector type of 1416/// the specified element type and size. VectorType must be a built-in type. 1417QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1418 bool IsAltiVec, bool IsPixel) { 1419 BuiltinType *baseType; 1420 1421 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1422 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1423 1424 // Check if we've already instantiated a vector of this type. 1425 llvm::FoldingSetNodeID ID; 1426 VectorType::Profile(ID, vecType, NumElts, Type::Vector, 1427 IsAltiVec, IsPixel); 1428 void *InsertPos = 0; 1429 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1430 return QualType(VTP, 0); 1431 1432 // If the element type isn't canonical, this won't be a canonical type either, 1433 // so fill in the canonical type field. 1434 QualType Canonical; 1435 if (!vecType.isCanonical() || IsAltiVec || IsPixel) { 1436 Canonical = getVectorType(getCanonicalType(vecType), 1437 NumElts, false, false); 1438 1439 // Get the new insert position for the node we care about. 1440 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1441 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1442 } 1443 VectorType *New = new (*this, TypeAlignment) 1444 VectorType(vecType, NumElts, Canonical, IsAltiVec, IsPixel); 1445 VectorTypes.InsertNode(New, InsertPos); 1446 Types.push_back(New); 1447 return QualType(New, 0); 1448} 1449 1450/// getExtVectorType - Return the unique reference to an extended vector type of 1451/// the specified element type and size. VectorType must be a built-in type. 1452QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1453 BuiltinType *baseType; 1454 1455 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1456 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1457 1458 // Check if we've already instantiated a vector of this type. 1459 llvm::FoldingSetNodeID ID; 1460 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, false, false); 1461 void *InsertPos = 0; 1462 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1463 return QualType(VTP, 0); 1464 1465 // If the element type isn't canonical, this won't be a canonical type either, 1466 // so fill in the canonical type field. 1467 QualType Canonical; 1468 if (!vecType.isCanonical()) { 1469 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1470 1471 // Get the new insert position for the node we care about. 1472 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1473 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1474 } 1475 ExtVectorType *New = new (*this, TypeAlignment) 1476 ExtVectorType(vecType, NumElts, Canonical); 1477 VectorTypes.InsertNode(New, InsertPos); 1478 Types.push_back(New); 1479 return QualType(New, 0); 1480} 1481 1482QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1483 Expr *SizeExpr, 1484 SourceLocation AttrLoc) { 1485 llvm::FoldingSetNodeID ID; 1486 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1487 SizeExpr); 1488 1489 void *InsertPos = 0; 1490 DependentSizedExtVectorType *Canon 1491 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1492 DependentSizedExtVectorType *New; 1493 if (Canon) { 1494 // We already have a canonical version of this array type; use it as 1495 // the canonical type for a newly-built type. 1496 New = new (*this, TypeAlignment) 1497 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1498 SizeExpr, AttrLoc); 1499 } else { 1500 QualType CanonVecTy = getCanonicalType(vecType); 1501 if (CanonVecTy == vecType) { 1502 New = new (*this, TypeAlignment) 1503 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1504 AttrLoc); 1505 1506 DependentSizedExtVectorType *CanonCheck 1507 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1508 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1509 (void)CanonCheck; 1510 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1511 } else { 1512 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1513 SourceLocation()); 1514 New = new (*this, TypeAlignment) 1515 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1516 } 1517 } 1518 1519 Types.push_back(New); 1520 return QualType(New, 0); 1521} 1522 1523/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1524/// 1525QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, 1526 const FunctionType::ExtInfo &Info) { 1527 const CallingConv CallConv = Info.getCC(); 1528 // Unique functions, to guarantee there is only one function of a particular 1529 // structure. 1530 llvm::FoldingSetNodeID ID; 1531 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1532 1533 void *InsertPos = 0; 1534 if (FunctionNoProtoType *FT = 1535 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1536 return QualType(FT, 0); 1537 1538 QualType Canonical; 1539 if (!ResultTy.isCanonical() || 1540 getCanonicalCallConv(CallConv) != CallConv) { 1541 Canonical = 1542 getFunctionNoProtoType(getCanonicalType(ResultTy), 1543 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1544 1545 // Get the new insert position for the node we care about. 1546 FunctionNoProtoType *NewIP = 1547 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1548 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1549 } 1550 1551 FunctionNoProtoType *New = new (*this, TypeAlignment) 1552 FunctionNoProtoType(ResultTy, Canonical, Info); 1553 Types.push_back(New); 1554 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1555 return QualType(New, 0); 1556} 1557 1558/// getFunctionType - Return a normal function type with a typed argument 1559/// list. isVariadic indicates whether the argument list includes '...'. 1560QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1561 unsigned NumArgs, bool isVariadic, 1562 unsigned TypeQuals, bool hasExceptionSpec, 1563 bool hasAnyExceptionSpec, unsigned NumExs, 1564 const QualType *ExArray, 1565 const FunctionType::ExtInfo &Info) { 1566 const CallingConv CallConv= Info.getCC(); 1567 // Unique functions, to guarantee there is only one function of a particular 1568 // structure. 1569 llvm::FoldingSetNodeID ID; 1570 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1571 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1572 NumExs, ExArray, Info); 1573 1574 void *InsertPos = 0; 1575 if (FunctionProtoType *FTP = 1576 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1577 return QualType(FTP, 0); 1578 1579 // Determine whether the type being created is already canonical or not. 1580 bool isCanonical = !hasExceptionSpec && ResultTy.isCanonical(); 1581 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1582 if (!ArgArray[i].isCanonicalAsParam()) 1583 isCanonical = false; 1584 1585 // If this type isn't canonical, get the canonical version of it. 1586 // The exception spec is not part of the canonical type. 1587 QualType Canonical; 1588 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1589 llvm::SmallVector<QualType, 16> CanonicalArgs; 1590 CanonicalArgs.reserve(NumArgs); 1591 for (unsigned i = 0; i != NumArgs; ++i) 1592 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1593 1594 Canonical = getFunctionType(getCanonicalType(ResultTy), 1595 CanonicalArgs.data(), NumArgs, 1596 isVariadic, TypeQuals, false, 1597 false, 0, 0, 1598 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1599 1600 // Get the new insert position for the node we care about. 1601 FunctionProtoType *NewIP = 1602 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1603 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1604 } 1605 1606 // FunctionProtoType objects are allocated with extra bytes after them 1607 // for two variable size arrays (for parameter and exception types) at the 1608 // end of them. 1609 FunctionProtoType *FTP = 1610 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1611 NumArgs*sizeof(QualType) + 1612 NumExs*sizeof(QualType), TypeAlignment); 1613 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1614 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1615 ExArray, NumExs, Canonical, Info); 1616 Types.push_back(FTP); 1617 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1618 return QualType(FTP, 0); 1619} 1620 1621#ifndef NDEBUG 1622static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1623 if (!isa<CXXRecordDecl>(D)) return false; 1624 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1625 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1626 return true; 1627 if (RD->getDescribedClassTemplate() && 1628 !isa<ClassTemplateSpecializationDecl>(RD)) 1629 return true; 1630 return false; 1631} 1632#endif 1633 1634/// getInjectedClassNameType - Return the unique reference to the 1635/// injected class name type for the specified templated declaration. 1636QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1637 QualType TST) { 1638 assert(NeedsInjectedClassNameType(Decl)); 1639 if (Decl->TypeForDecl) { 1640 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1641 } else if (CXXRecordDecl *PrevDecl 1642 = cast_or_null<CXXRecordDecl>(Decl->getPreviousDeclaration())) { 1643 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1644 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1645 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1646 } else { 1647 Decl->TypeForDecl = 1648 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 1649 Types.push_back(Decl->TypeForDecl); 1650 } 1651 return QualType(Decl->TypeForDecl, 0); 1652} 1653 1654/// getTypeDeclType - Return the unique reference to the type for the 1655/// specified type declaration. 1656QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) { 1657 assert(Decl && "Passed null for Decl param"); 1658 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 1659 1660 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1661 return getTypedefType(Typedef); 1662 1663 assert(!isa<TemplateTypeParmDecl>(Decl) && 1664 "Template type parameter types are always available."); 1665 1666 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1667 assert(!Record->getPreviousDeclaration() && 1668 "struct/union has previous declaration"); 1669 assert(!NeedsInjectedClassNameType(Record)); 1670 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Record); 1671 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1672 assert(!Enum->getPreviousDeclaration() && 1673 "enum has previous declaration"); 1674 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Enum); 1675 } else if (const UnresolvedUsingTypenameDecl *Using = 1676 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1677 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1678 } else 1679 llvm_unreachable("TypeDecl without a type?"); 1680 1681 Types.push_back(Decl->TypeForDecl); 1682 return QualType(Decl->TypeForDecl, 0); 1683} 1684 1685/// getTypedefType - Return the unique reference to the type for the 1686/// specified typename decl. 1687QualType ASTContext::getTypedefType(const TypedefDecl *Decl) { 1688 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1689 1690 QualType Canonical = getCanonicalType(Decl->getUnderlyingType()); 1691 Decl->TypeForDecl = new(*this, TypeAlignment) 1692 TypedefType(Type::Typedef, Decl, Canonical); 1693 Types.push_back(Decl->TypeForDecl); 1694 return QualType(Decl->TypeForDecl, 0); 1695} 1696 1697/// \brief Retrieve a substitution-result type. 1698QualType 1699ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1700 QualType Replacement) { 1701 assert(Replacement.isCanonical() 1702 && "replacement types must always be canonical"); 1703 1704 llvm::FoldingSetNodeID ID; 1705 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1706 void *InsertPos = 0; 1707 SubstTemplateTypeParmType *SubstParm 1708 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1709 1710 if (!SubstParm) { 1711 SubstParm = new (*this, TypeAlignment) 1712 SubstTemplateTypeParmType(Parm, Replacement); 1713 Types.push_back(SubstParm); 1714 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1715 } 1716 1717 return QualType(SubstParm, 0); 1718} 1719 1720/// \brief Retrieve the template type parameter type for a template 1721/// parameter or parameter pack with the given depth, index, and (optionally) 1722/// name. 1723QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1724 bool ParameterPack, 1725 IdentifierInfo *Name) { 1726 llvm::FoldingSetNodeID ID; 1727 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1728 void *InsertPos = 0; 1729 TemplateTypeParmType *TypeParm 1730 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1731 1732 if (TypeParm) 1733 return QualType(TypeParm, 0); 1734 1735 if (Name) { 1736 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1737 TypeParm = new (*this, TypeAlignment) 1738 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 1739 1740 TemplateTypeParmType *TypeCheck 1741 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1742 assert(!TypeCheck && "Template type parameter canonical type broken"); 1743 (void)TypeCheck; 1744 } else 1745 TypeParm = new (*this, TypeAlignment) 1746 TemplateTypeParmType(Depth, Index, ParameterPack); 1747 1748 Types.push_back(TypeParm); 1749 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1750 1751 return QualType(TypeParm, 0); 1752} 1753 1754TypeSourceInfo * 1755ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 1756 SourceLocation NameLoc, 1757 const TemplateArgumentListInfo &Args, 1758 QualType CanonType) { 1759 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 1760 1761 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 1762 TemplateSpecializationTypeLoc TL 1763 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 1764 TL.setTemplateNameLoc(NameLoc); 1765 TL.setLAngleLoc(Args.getLAngleLoc()); 1766 TL.setRAngleLoc(Args.getRAngleLoc()); 1767 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 1768 TL.setArgLocInfo(i, Args[i].getLocInfo()); 1769 return DI; 1770} 1771 1772QualType 1773ASTContext::getTemplateSpecializationType(TemplateName Template, 1774 const TemplateArgumentListInfo &Args, 1775 QualType Canon, 1776 bool IsCurrentInstantiation) { 1777 unsigned NumArgs = Args.size(); 1778 1779 llvm::SmallVector<TemplateArgument, 4> ArgVec; 1780 ArgVec.reserve(NumArgs); 1781 for (unsigned i = 0; i != NumArgs; ++i) 1782 ArgVec.push_back(Args[i].getArgument()); 1783 1784 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 1785 Canon, IsCurrentInstantiation); 1786} 1787 1788QualType 1789ASTContext::getTemplateSpecializationType(TemplateName Template, 1790 const TemplateArgument *Args, 1791 unsigned NumArgs, 1792 QualType Canon, 1793 bool IsCurrentInstantiation) { 1794 if (!Canon.isNull()) 1795 Canon = getCanonicalType(Canon); 1796 else { 1797 assert(!IsCurrentInstantiation && 1798 "current-instantiation specializations should always " 1799 "have a canonical type"); 1800 1801 // Build the canonical template specialization type. 1802 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 1803 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 1804 CanonArgs.reserve(NumArgs); 1805 for (unsigned I = 0; I != NumArgs; ++I) 1806 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 1807 1808 // Determine whether this canonical template specialization type already 1809 // exists. 1810 llvm::FoldingSetNodeID ID; 1811 TemplateSpecializationType::Profile(ID, CanonTemplate, false, 1812 CanonArgs.data(), NumArgs, *this); 1813 1814 void *InsertPos = 0; 1815 TemplateSpecializationType *Spec 1816 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1817 1818 if (!Spec) { 1819 // Allocate a new canonical template specialization type. 1820 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1821 sizeof(TemplateArgument) * NumArgs), 1822 TypeAlignment); 1823 Spec = new (Mem) TemplateSpecializationType(*this, CanonTemplate, false, 1824 CanonArgs.data(), NumArgs, 1825 Canon); 1826 Types.push_back(Spec); 1827 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1828 } 1829 1830 if (Canon.isNull()) 1831 Canon = QualType(Spec, 0); 1832 assert(Canon->isDependentType() && 1833 "Non-dependent template-id type must have a canonical type"); 1834 } 1835 1836 // Allocate the (non-canonical) template specialization type, but don't 1837 // try to unique it: these types typically have location information that 1838 // we don't unique and don't want to lose. 1839 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1840 sizeof(TemplateArgument) * NumArgs), 1841 TypeAlignment); 1842 TemplateSpecializationType *Spec 1843 = new (Mem) TemplateSpecializationType(*this, Template, 1844 IsCurrentInstantiation, 1845 Args, NumArgs, 1846 Canon); 1847 1848 Types.push_back(Spec); 1849 return QualType(Spec, 0); 1850} 1851 1852QualType 1853ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 1854 NestedNameSpecifier *NNS, 1855 QualType NamedType) { 1856 llvm::FoldingSetNodeID ID; 1857 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 1858 1859 void *InsertPos = 0; 1860 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1861 if (T) 1862 return QualType(T, 0); 1863 1864 QualType Canon = NamedType; 1865 if (!Canon.isCanonical()) { 1866 Canon = getCanonicalType(NamedType); 1867 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1868 assert(!CheckT && "Elaborated canonical type broken"); 1869 (void)CheckT; 1870 } 1871 1872 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 1873 Types.push_back(T); 1874 ElaboratedTypes.InsertNode(T, InsertPos); 1875 return QualType(T, 0); 1876} 1877 1878QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 1879 NestedNameSpecifier *NNS, 1880 const IdentifierInfo *Name, 1881 QualType Canon) { 1882 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1883 1884 if (Canon.isNull()) { 1885 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1886 ElaboratedTypeKeyword CanonKeyword = Keyword; 1887 if (Keyword == ETK_None) 1888 CanonKeyword = ETK_Typename; 1889 1890 if (CanonNNS != NNS || CanonKeyword != Keyword) 1891 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 1892 } 1893 1894 llvm::FoldingSetNodeID ID; 1895 DependentNameType::Profile(ID, Keyword, NNS, Name); 1896 1897 void *InsertPos = 0; 1898 DependentNameType *T 1899 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1900 if (T) 1901 return QualType(T, 0); 1902 1903 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 1904 Types.push_back(T); 1905 DependentNameTypes.InsertNode(T, InsertPos); 1906 return QualType(T, 0); 1907} 1908 1909QualType 1910ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 1911 NestedNameSpecifier *NNS, 1912 const TemplateSpecializationType *TemplateId, 1913 QualType Canon) { 1914 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1915 1916 llvm::FoldingSetNodeID ID; 1917 DependentNameType::Profile(ID, Keyword, NNS, TemplateId); 1918 1919 void *InsertPos = 0; 1920 DependentNameType *T 1921 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1922 if (T) 1923 return QualType(T, 0); 1924 1925 if (Canon.isNull()) { 1926 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1927 QualType CanonType = getCanonicalType(QualType(TemplateId, 0)); 1928 ElaboratedTypeKeyword CanonKeyword = Keyword; 1929 if (Keyword == ETK_None) 1930 CanonKeyword = ETK_Typename; 1931 if (CanonNNS != NNS || CanonKeyword != Keyword || 1932 CanonType != QualType(TemplateId, 0)) { 1933 const TemplateSpecializationType *CanonTemplateId 1934 = CanonType->getAs<TemplateSpecializationType>(); 1935 assert(CanonTemplateId && 1936 "Canonical type must also be a template specialization type"); 1937 Canon = getDependentNameType(CanonKeyword, CanonNNS, CanonTemplateId); 1938 } 1939 1940 DependentNameType *CheckT 1941 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1942 assert(!CheckT && "Typename canonical type is broken"); (void)CheckT; 1943 } 1944 1945 T = new (*this) DependentNameType(Keyword, NNS, TemplateId, Canon); 1946 Types.push_back(T); 1947 DependentNameTypes.InsertNode(T, InsertPos); 1948 return QualType(T, 0); 1949} 1950 1951/// CmpProtocolNames - Comparison predicate for sorting protocols 1952/// alphabetically. 1953static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 1954 const ObjCProtocolDecl *RHS) { 1955 return LHS->getDeclName() < RHS->getDeclName(); 1956} 1957 1958static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 1959 unsigned NumProtocols) { 1960 if (NumProtocols == 0) return true; 1961 1962 for (unsigned i = 1; i != NumProtocols; ++i) 1963 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 1964 return false; 1965 return true; 1966} 1967 1968static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 1969 unsigned &NumProtocols) { 1970 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 1971 1972 // Sort protocols, keyed by name. 1973 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 1974 1975 // Remove duplicates. 1976 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 1977 NumProtocols = ProtocolsEnd-Protocols; 1978} 1979 1980QualType ASTContext::getObjCObjectType(QualType BaseType, 1981 ObjCProtocolDecl * const *Protocols, 1982 unsigned NumProtocols) { 1983 // If the base type is an interface and there aren't any protocols 1984 // to add, then the interface type will do just fine. 1985 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 1986 return BaseType; 1987 1988 // Look in the folding set for an existing type. 1989 llvm::FoldingSetNodeID ID; 1990 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 1991 void *InsertPos = 0; 1992 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 1993 return QualType(QT, 0); 1994 1995 // Build the canonical type, which has the canonical base type and 1996 // a sorted-and-uniqued list of protocols. 1997 QualType Canonical; 1998 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 1999 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2000 if (!ProtocolsSorted) { 2001 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2002 Protocols + NumProtocols); 2003 unsigned UniqueCount = NumProtocols; 2004 2005 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2006 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2007 &Sorted[0], UniqueCount); 2008 } else { 2009 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2010 Protocols, NumProtocols); 2011 } 2012 2013 // Regenerate InsertPos. 2014 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2015 } 2016 2017 unsigned Size = sizeof(ObjCObjectTypeImpl); 2018 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2019 void *Mem = Allocate(Size, TypeAlignment); 2020 ObjCObjectTypeImpl *T = 2021 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2022 2023 Types.push_back(T); 2024 ObjCObjectTypes.InsertNode(T, InsertPos); 2025 return QualType(T, 0); 2026} 2027 2028/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2029/// the given object type. 2030QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) { 2031 llvm::FoldingSetNodeID ID; 2032 ObjCObjectPointerType::Profile(ID, ObjectT); 2033 2034 void *InsertPos = 0; 2035 if (ObjCObjectPointerType *QT = 2036 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2037 return QualType(QT, 0); 2038 2039 // Find the canonical object type. 2040 QualType Canonical; 2041 if (!ObjectT.isCanonical()) { 2042 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2043 2044 // Regenerate InsertPos. 2045 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2046 } 2047 2048 // No match. 2049 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2050 ObjCObjectPointerType *QType = 2051 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2052 2053 Types.push_back(QType); 2054 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2055 return QualType(QType, 0); 2056} 2057 2058/// getObjCInterfaceType - Return the unique reference to the type for the 2059/// specified ObjC interface decl. The list of protocols is optional. 2060QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) { 2061 if (Decl->TypeForDecl) 2062 return QualType(Decl->TypeForDecl, 0); 2063 2064 // FIXME: redeclarations? 2065 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2066 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2067 Decl->TypeForDecl = T; 2068 Types.push_back(T); 2069 return QualType(T, 0); 2070} 2071 2072/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2073/// TypeOfExprType AST's (since expression's are never shared). For example, 2074/// multiple declarations that refer to "typeof(x)" all contain different 2075/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2076/// on canonical type's (which are always unique). 2077QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2078 TypeOfExprType *toe; 2079 if (tofExpr->isTypeDependent()) { 2080 llvm::FoldingSetNodeID ID; 2081 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2082 2083 void *InsertPos = 0; 2084 DependentTypeOfExprType *Canon 2085 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2086 if (Canon) { 2087 // We already have a "canonical" version of an identical, dependent 2088 // typeof(expr) type. Use that as our canonical type. 2089 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2090 QualType((TypeOfExprType*)Canon, 0)); 2091 } 2092 else { 2093 // Build a new, canonical typeof(expr) type. 2094 Canon 2095 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2096 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2097 toe = Canon; 2098 } 2099 } else { 2100 QualType Canonical = getCanonicalType(tofExpr->getType()); 2101 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2102 } 2103 Types.push_back(toe); 2104 return QualType(toe, 0); 2105} 2106 2107/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2108/// TypeOfType AST's. The only motivation to unique these nodes would be 2109/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2110/// an issue. This doesn't effect the type checker, since it operates 2111/// on canonical type's (which are always unique). 2112QualType ASTContext::getTypeOfType(QualType tofType) { 2113 QualType Canonical = getCanonicalType(tofType); 2114 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2115 Types.push_back(tot); 2116 return QualType(tot, 0); 2117} 2118 2119/// getDecltypeForExpr - Given an expr, will return the decltype for that 2120/// expression, according to the rules in C++0x [dcl.type.simple]p4 2121static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2122 if (e->isTypeDependent()) 2123 return Context.DependentTy; 2124 2125 // If e is an id expression or a class member access, decltype(e) is defined 2126 // as the type of the entity named by e. 2127 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2128 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2129 return VD->getType(); 2130 } 2131 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2132 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2133 return FD->getType(); 2134 } 2135 // If e is a function call or an invocation of an overloaded operator, 2136 // (parentheses around e are ignored), decltype(e) is defined as the 2137 // return type of that function. 2138 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2139 return CE->getCallReturnType(); 2140 2141 QualType T = e->getType(); 2142 2143 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2144 // defined as T&, otherwise decltype(e) is defined as T. 2145 if (e->isLvalue(Context) == Expr::LV_Valid) 2146 T = Context.getLValueReferenceType(T); 2147 2148 return T; 2149} 2150 2151/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2152/// DecltypeType AST's. The only motivation to unique these nodes would be 2153/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2154/// an issue. This doesn't effect the type checker, since it operates 2155/// on canonical type's (which are always unique). 2156QualType ASTContext::getDecltypeType(Expr *e) { 2157 DecltypeType *dt; 2158 if (e->isTypeDependent()) { 2159 llvm::FoldingSetNodeID ID; 2160 DependentDecltypeType::Profile(ID, *this, e); 2161 2162 void *InsertPos = 0; 2163 DependentDecltypeType *Canon 2164 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2165 if (Canon) { 2166 // We already have a "canonical" version of an equivalent, dependent 2167 // decltype type. Use that as our canonical type. 2168 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2169 QualType((DecltypeType*)Canon, 0)); 2170 } 2171 else { 2172 // Build a new, canonical typeof(expr) type. 2173 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2174 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2175 dt = Canon; 2176 } 2177 } else { 2178 QualType T = getDecltypeForExpr(e, *this); 2179 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2180 } 2181 Types.push_back(dt); 2182 return QualType(dt, 0); 2183} 2184 2185/// getTagDeclType - Return the unique reference to the type for the 2186/// specified TagDecl (struct/union/class/enum) decl. 2187QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2188 assert (Decl); 2189 // FIXME: What is the design on getTagDeclType when it requires casting 2190 // away const? mutable? 2191 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2192} 2193 2194/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2195/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2196/// needs to agree with the definition in <stddef.h>. 2197CanQualType ASTContext::getSizeType() const { 2198 return getFromTargetType(Target.getSizeType()); 2199} 2200 2201/// getSignedWCharType - Return the type of "signed wchar_t". 2202/// Used when in C++, as a GCC extension. 2203QualType ASTContext::getSignedWCharType() const { 2204 // FIXME: derive from "Target" ? 2205 return WCharTy; 2206} 2207 2208/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2209/// Used when in C++, as a GCC extension. 2210QualType ASTContext::getUnsignedWCharType() const { 2211 // FIXME: derive from "Target" ? 2212 return UnsignedIntTy; 2213} 2214 2215/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2216/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2217QualType ASTContext::getPointerDiffType() const { 2218 return getFromTargetType(Target.getPtrDiffType(0)); 2219} 2220 2221//===----------------------------------------------------------------------===// 2222// Type Operators 2223//===----------------------------------------------------------------------===// 2224 2225CanQualType ASTContext::getCanonicalParamType(QualType T) { 2226 // Push qualifiers into arrays, and then discard any remaining 2227 // qualifiers. 2228 T = getCanonicalType(T); 2229 const Type *Ty = T.getTypePtr(); 2230 2231 QualType Result; 2232 if (isa<ArrayType>(Ty)) { 2233 Result = getArrayDecayedType(QualType(Ty,0)); 2234 } else if (isa<FunctionType>(Ty)) { 2235 Result = getPointerType(QualType(Ty, 0)); 2236 } else { 2237 Result = QualType(Ty, 0); 2238 } 2239 2240 return CanQualType::CreateUnsafe(Result); 2241} 2242 2243/// getCanonicalType - Return the canonical (structural) type corresponding to 2244/// the specified potentially non-canonical type. The non-canonical version 2245/// of a type may have many "decorated" versions of types. Decorators can 2246/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2247/// to be free of any of these, allowing two canonical types to be compared 2248/// for exact equality with a simple pointer comparison. 2249CanQualType ASTContext::getCanonicalType(QualType T) { 2250 QualifierCollector Quals; 2251 const Type *Ptr = Quals.strip(T); 2252 QualType CanType = Ptr->getCanonicalTypeInternal(); 2253 2254 // The canonical internal type will be the canonical type *except* 2255 // that we push type qualifiers down through array types. 2256 2257 // If there are no new qualifiers to push down, stop here. 2258 if (!Quals.hasQualifiers()) 2259 return CanQualType::CreateUnsafe(CanType); 2260 2261 // If the type qualifiers are on an array type, get the canonical 2262 // type of the array with the qualifiers applied to the element 2263 // type. 2264 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2265 if (!AT) 2266 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2267 2268 // Get the canonical version of the element with the extra qualifiers on it. 2269 // This can recursively sink qualifiers through multiple levels of arrays. 2270 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2271 NewEltTy = getCanonicalType(NewEltTy); 2272 2273 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2274 return CanQualType::CreateUnsafe( 2275 getConstantArrayType(NewEltTy, CAT->getSize(), 2276 CAT->getSizeModifier(), 2277 CAT->getIndexTypeCVRQualifiers())); 2278 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2279 return CanQualType::CreateUnsafe( 2280 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2281 IAT->getIndexTypeCVRQualifiers())); 2282 2283 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2284 return CanQualType::CreateUnsafe( 2285 getDependentSizedArrayType(NewEltTy, 2286 DSAT->getSizeExpr() ? 2287 DSAT->getSizeExpr()->Retain() : 0, 2288 DSAT->getSizeModifier(), 2289 DSAT->getIndexTypeCVRQualifiers(), 2290 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2291 2292 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2293 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2294 VAT->getSizeExpr() ? 2295 VAT->getSizeExpr()->Retain() : 0, 2296 VAT->getSizeModifier(), 2297 VAT->getIndexTypeCVRQualifiers(), 2298 VAT->getBracketsRange())); 2299} 2300 2301QualType ASTContext::getUnqualifiedArrayType(QualType T, 2302 Qualifiers &Quals) { 2303 Quals = T.getQualifiers(); 2304 const ArrayType *AT = getAsArrayType(T); 2305 if (!AT) { 2306 return T.getUnqualifiedType(); 2307 } 2308 2309 QualType Elt = AT->getElementType(); 2310 QualType UnqualElt = getUnqualifiedArrayType(Elt, Quals); 2311 if (Elt == UnqualElt) 2312 return T; 2313 2314 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 2315 return getConstantArrayType(UnqualElt, CAT->getSize(), 2316 CAT->getSizeModifier(), 0); 2317 } 2318 2319 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 2320 return getIncompleteArrayType(UnqualElt, IAT->getSizeModifier(), 0); 2321 } 2322 2323 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 2324 return getVariableArrayType(UnqualElt, 2325 VAT->getSizeExpr() ? 2326 VAT->getSizeExpr()->Retain() : 0, 2327 VAT->getSizeModifier(), 2328 VAT->getIndexTypeCVRQualifiers(), 2329 VAT->getBracketsRange()); 2330 } 2331 2332 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 2333 return getDependentSizedArrayType(UnqualElt, DSAT->getSizeExpr()->Retain(), 2334 DSAT->getSizeModifier(), 0, 2335 SourceRange()); 2336} 2337 2338DeclarationName ASTContext::getNameForTemplate(TemplateName Name) { 2339 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2340 return TD->getDeclName(); 2341 2342 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2343 if (DTN->isIdentifier()) { 2344 return DeclarationNames.getIdentifier(DTN->getIdentifier()); 2345 } else { 2346 return DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2347 } 2348 } 2349 2350 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2351 assert(Storage); 2352 return (*Storage->begin())->getDeclName(); 2353} 2354 2355TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2356 // If this template name refers to a template, the canonical 2357 // template name merely stores the template itself. 2358 if (TemplateDecl *Template = Name.getAsTemplateDecl()) 2359 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2360 2361 assert(!Name.getAsOverloadedTemplate()); 2362 2363 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2364 assert(DTN && "Non-dependent template names must refer to template decls."); 2365 return DTN->CanonicalTemplateName; 2366} 2367 2368bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2369 X = getCanonicalTemplateName(X); 2370 Y = getCanonicalTemplateName(Y); 2371 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2372} 2373 2374TemplateArgument 2375ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2376 switch (Arg.getKind()) { 2377 case TemplateArgument::Null: 2378 return Arg; 2379 2380 case TemplateArgument::Expression: 2381 return Arg; 2382 2383 case TemplateArgument::Declaration: 2384 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2385 2386 case TemplateArgument::Template: 2387 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2388 2389 case TemplateArgument::Integral: 2390 return TemplateArgument(*Arg.getAsIntegral(), 2391 getCanonicalType(Arg.getIntegralType())); 2392 2393 case TemplateArgument::Type: 2394 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2395 2396 case TemplateArgument::Pack: { 2397 // FIXME: Allocate in ASTContext 2398 TemplateArgument *CanonArgs = new TemplateArgument[Arg.pack_size()]; 2399 unsigned Idx = 0; 2400 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2401 AEnd = Arg.pack_end(); 2402 A != AEnd; (void)++A, ++Idx) 2403 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2404 2405 TemplateArgument Result; 2406 Result.setArgumentPack(CanonArgs, Arg.pack_size(), false); 2407 return Result; 2408 } 2409 } 2410 2411 // Silence GCC warning 2412 assert(false && "Unhandled template argument kind"); 2413 return TemplateArgument(); 2414} 2415 2416NestedNameSpecifier * 2417ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2418 if (!NNS) 2419 return 0; 2420 2421 switch (NNS->getKind()) { 2422 case NestedNameSpecifier::Identifier: 2423 // Canonicalize the prefix but keep the identifier the same. 2424 return NestedNameSpecifier::Create(*this, 2425 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2426 NNS->getAsIdentifier()); 2427 2428 case NestedNameSpecifier::Namespace: 2429 // A namespace is canonical; build a nested-name-specifier with 2430 // this namespace and no prefix. 2431 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2432 2433 case NestedNameSpecifier::TypeSpec: 2434 case NestedNameSpecifier::TypeSpecWithTemplate: { 2435 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2436 return NestedNameSpecifier::Create(*this, 0, 2437 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2438 T.getTypePtr()); 2439 } 2440 2441 case NestedNameSpecifier::Global: 2442 // The global specifier is canonical and unique. 2443 return NNS; 2444 } 2445 2446 // Required to silence a GCC warning 2447 return 0; 2448} 2449 2450 2451const ArrayType *ASTContext::getAsArrayType(QualType T) { 2452 // Handle the non-qualified case efficiently. 2453 if (!T.hasLocalQualifiers()) { 2454 // Handle the common positive case fast. 2455 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2456 return AT; 2457 } 2458 2459 // Handle the common negative case fast. 2460 QualType CType = T->getCanonicalTypeInternal(); 2461 if (!isa<ArrayType>(CType)) 2462 return 0; 2463 2464 // Apply any qualifiers from the array type to the element type. This 2465 // implements C99 6.7.3p8: "If the specification of an array type includes 2466 // any type qualifiers, the element type is so qualified, not the array type." 2467 2468 // If we get here, we either have type qualifiers on the type, or we have 2469 // sugar such as a typedef in the way. If we have type qualifiers on the type 2470 // we must propagate them down into the element type. 2471 2472 QualifierCollector Qs; 2473 const Type *Ty = Qs.strip(T.getDesugaredType()); 2474 2475 // If we have a simple case, just return now. 2476 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2477 if (ATy == 0 || Qs.empty()) 2478 return ATy; 2479 2480 // Otherwise, we have an array and we have qualifiers on it. Push the 2481 // qualifiers into the array element type and return a new array type. 2482 // Get the canonical version of the element with the extra qualifiers on it. 2483 // This can recursively sink qualifiers through multiple levels of arrays. 2484 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2485 2486 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2487 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2488 CAT->getSizeModifier(), 2489 CAT->getIndexTypeCVRQualifiers())); 2490 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2491 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2492 IAT->getSizeModifier(), 2493 IAT->getIndexTypeCVRQualifiers())); 2494 2495 if (const DependentSizedArrayType *DSAT 2496 = dyn_cast<DependentSizedArrayType>(ATy)) 2497 return cast<ArrayType>( 2498 getDependentSizedArrayType(NewEltTy, 2499 DSAT->getSizeExpr() ? 2500 DSAT->getSizeExpr()->Retain() : 0, 2501 DSAT->getSizeModifier(), 2502 DSAT->getIndexTypeCVRQualifiers(), 2503 DSAT->getBracketsRange())); 2504 2505 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2506 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2507 VAT->getSizeExpr() ? 2508 VAT->getSizeExpr()->Retain() : 0, 2509 VAT->getSizeModifier(), 2510 VAT->getIndexTypeCVRQualifiers(), 2511 VAT->getBracketsRange())); 2512} 2513 2514 2515/// getArrayDecayedType - Return the properly qualified result of decaying the 2516/// specified array type to a pointer. This operation is non-trivial when 2517/// handling typedefs etc. The canonical type of "T" must be an array type, 2518/// this returns a pointer to a properly qualified element of the array. 2519/// 2520/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2521QualType ASTContext::getArrayDecayedType(QualType Ty) { 2522 // Get the element type with 'getAsArrayType' so that we don't lose any 2523 // typedefs in the element type of the array. This also handles propagation 2524 // of type qualifiers from the array type into the element type if present 2525 // (C99 6.7.3p8). 2526 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2527 assert(PrettyArrayType && "Not an array type!"); 2528 2529 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2530 2531 // int x[restrict 4] -> int *restrict 2532 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2533} 2534 2535QualType ASTContext::getBaseElementType(QualType QT) { 2536 QualifierCollector Qs; 2537 while (const ArrayType *AT = getAsArrayType(QualType(Qs.strip(QT), 0))) 2538 QT = AT->getElementType(); 2539 return Qs.apply(QT); 2540} 2541 2542QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2543 QualType ElemTy = AT->getElementType(); 2544 2545 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2546 return getBaseElementType(AT); 2547 2548 return ElemTy; 2549} 2550 2551/// getConstantArrayElementCount - Returns number of constant array elements. 2552uint64_t 2553ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2554 uint64_t ElementCount = 1; 2555 do { 2556 ElementCount *= CA->getSize().getZExtValue(); 2557 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2558 } while (CA); 2559 return ElementCount; 2560} 2561 2562/// getFloatingRank - Return a relative rank for floating point types. 2563/// This routine will assert if passed a built-in type that isn't a float. 2564static FloatingRank getFloatingRank(QualType T) { 2565 if (const ComplexType *CT = T->getAs<ComplexType>()) 2566 return getFloatingRank(CT->getElementType()); 2567 2568 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2569 switch (T->getAs<BuiltinType>()->getKind()) { 2570 default: assert(0 && "getFloatingRank(): not a floating type"); 2571 case BuiltinType::Float: return FloatRank; 2572 case BuiltinType::Double: return DoubleRank; 2573 case BuiltinType::LongDouble: return LongDoubleRank; 2574 } 2575} 2576 2577/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2578/// point or a complex type (based on typeDomain/typeSize). 2579/// 'typeDomain' is a real floating point or complex type. 2580/// 'typeSize' is a real floating point or complex type. 2581QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2582 QualType Domain) const { 2583 FloatingRank EltRank = getFloatingRank(Size); 2584 if (Domain->isComplexType()) { 2585 switch (EltRank) { 2586 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2587 case FloatRank: return FloatComplexTy; 2588 case DoubleRank: return DoubleComplexTy; 2589 case LongDoubleRank: return LongDoubleComplexTy; 2590 } 2591 } 2592 2593 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2594 switch (EltRank) { 2595 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2596 case FloatRank: return FloatTy; 2597 case DoubleRank: return DoubleTy; 2598 case LongDoubleRank: return LongDoubleTy; 2599 } 2600} 2601 2602/// getFloatingTypeOrder - Compare the rank of the two specified floating 2603/// point types, ignoring the domain of the type (i.e. 'double' == 2604/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2605/// LHS < RHS, return -1. 2606int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2607 FloatingRank LHSR = getFloatingRank(LHS); 2608 FloatingRank RHSR = getFloatingRank(RHS); 2609 2610 if (LHSR == RHSR) 2611 return 0; 2612 if (LHSR > RHSR) 2613 return 1; 2614 return -1; 2615} 2616 2617/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2618/// routine will assert if passed a built-in type that isn't an integer or enum, 2619/// or if it is not canonicalized. 2620unsigned ASTContext::getIntegerRank(Type *T) { 2621 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2622 if (EnumType* ET = dyn_cast<EnumType>(T)) 2623 T = ET->getDecl()->getPromotionType().getTypePtr(); 2624 2625 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2626 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2627 2628 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2629 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2630 2631 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2632 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2633 2634 switch (cast<BuiltinType>(T)->getKind()) { 2635 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2636 case BuiltinType::Bool: 2637 return 1 + (getIntWidth(BoolTy) << 3); 2638 case BuiltinType::Char_S: 2639 case BuiltinType::Char_U: 2640 case BuiltinType::SChar: 2641 case BuiltinType::UChar: 2642 return 2 + (getIntWidth(CharTy) << 3); 2643 case BuiltinType::Short: 2644 case BuiltinType::UShort: 2645 return 3 + (getIntWidth(ShortTy) << 3); 2646 case BuiltinType::Int: 2647 case BuiltinType::UInt: 2648 return 4 + (getIntWidth(IntTy) << 3); 2649 case BuiltinType::Long: 2650 case BuiltinType::ULong: 2651 return 5 + (getIntWidth(LongTy) << 3); 2652 case BuiltinType::LongLong: 2653 case BuiltinType::ULongLong: 2654 return 6 + (getIntWidth(LongLongTy) << 3); 2655 case BuiltinType::Int128: 2656 case BuiltinType::UInt128: 2657 return 7 + (getIntWidth(Int128Ty) << 3); 2658 } 2659} 2660 2661/// \brief Whether this is a promotable bitfield reference according 2662/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 2663/// 2664/// \returns the type this bit-field will promote to, or NULL if no 2665/// promotion occurs. 2666QualType ASTContext::isPromotableBitField(Expr *E) { 2667 if (E->isTypeDependent() || E->isValueDependent()) 2668 return QualType(); 2669 2670 FieldDecl *Field = E->getBitField(); 2671 if (!Field) 2672 return QualType(); 2673 2674 QualType FT = Field->getType(); 2675 2676 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 2677 uint64_t BitWidth = BitWidthAP.getZExtValue(); 2678 uint64_t IntSize = getTypeSize(IntTy); 2679 // GCC extension compatibility: if the bit-field size is less than or equal 2680 // to the size of int, it gets promoted no matter what its type is. 2681 // For instance, unsigned long bf : 4 gets promoted to signed int. 2682 if (BitWidth < IntSize) 2683 return IntTy; 2684 2685 if (BitWidth == IntSize) 2686 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 2687 2688 // Types bigger than int are not subject to promotions, and therefore act 2689 // like the base type. 2690 // FIXME: This doesn't quite match what gcc does, but what gcc does here 2691 // is ridiculous. 2692 return QualType(); 2693} 2694 2695/// getPromotedIntegerType - Returns the type that Promotable will 2696/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 2697/// integer type. 2698QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 2699 assert(!Promotable.isNull()); 2700 assert(Promotable->isPromotableIntegerType()); 2701 if (const EnumType *ET = Promotable->getAs<EnumType>()) 2702 return ET->getDecl()->getPromotionType(); 2703 if (Promotable->isSignedIntegerType()) 2704 return IntTy; 2705 uint64_t PromotableSize = getTypeSize(Promotable); 2706 uint64_t IntSize = getTypeSize(IntTy); 2707 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 2708 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 2709} 2710 2711/// getIntegerTypeOrder - Returns the highest ranked integer type: 2712/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2713/// LHS < RHS, return -1. 2714int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2715 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2716 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2717 if (LHSC == RHSC) return 0; 2718 2719 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2720 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2721 2722 unsigned LHSRank = getIntegerRank(LHSC); 2723 unsigned RHSRank = getIntegerRank(RHSC); 2724 2725 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2726 if (LHSRank == RHSRank) return 0; 2727 return LHSRank > RHSRank ? 1 : -1; 2728 } 2729 2730 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2731 if (LHSUnsigned) { 2732 // If the unsigned [LHS] type is larger, return it. 2733 if (LHSRank >= RHSRank) 2734 return 1; 2735 2736 // If the signed type can represent all values of the unsigned type, it 2737 // wins. Because we are dealing with 2's complement and types that are 2738 // powers of two larger than each other, this is always safe. 2739 return -1; 2740 } 2741 2742 // If the unsigned [RHS] type is larger, return it. 2743 if (RHSRank >= LHSRank) 2744 return -1; 2745 2746 // If the signed type can represent all values of the unsigned type, it 2747 // wins. Because we are dealing with 2's complement and types that are 2748 // powers of two larger than each other, this is always safe. 2749 return 1; 2750} 2751 2752static RecordDecl * 2753CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 2754 SourceLocation L, IdentifierInfo *Id) { 2755 if (Ctx.getLangOptions().CPlusPlus) 2756 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 2757 else 2758 return RecordDecl::Create(Ctx, TK, DC, L, Id); 2759} 2760 2761// getCFConstantStringType - Return the type used for constant CFStrings. 2762QualType ASTContext::getCFConstantStringType() { 2763 if (!CFConstantStringTypeDecl) { 2764 CFConstantStringTypeDecl = 2765 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2766 &Idents.get("NSConstantString")); 2767 CFConstantStringTypeDecl->startDefinition(); 2768 2769 QualType FieldTypes[4]; 2770 2771 // const int *isa; 2772 FieldTypes[0] = getPointerType(IntTy.withConst()); 2773 // int flags; 2774 FieldTypes[1] = IntTy; 2775 // const char *str; 2776 FieldTypes[2] = getPointerType(CharTy.withConst()); 2777 // long length; 2778 FieldTypes[3] = LongTy; 2779 2780 // Create fields 2781 for (unsigned i = 0; i < 4; ++i) { 2782 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2783 SourceLocation(), 0, 2784 FieldTypes[i], /*TInfo=*/0, 2785 /*BitWidth=*/0, 2786 /*Mutable=*/false); 2787 Field->setAccess(AS_public); 2788 CFConstantStringTypeDecl->addDecl(Field); 2789 } 2790 2791 CFConstantStringTypeDecl->completeDefinition(); 2792 } 2793 2794 return getTagDeclType(CFConstantStringTypeDecl); 2795} 2796 2797void ASTContext::setCFConstantStringType(QualType T) { 2798 const RecordType *Rec = T->getAs<RecordType>(); 2799 assert(Rec && "Invalid CFConstantStringType"); 2800 CFConstantStringTypeDecl = Rec->getDecl(); 2801} 2802 2803// getNSConstantStringType - Return the type used for constant NSStrings. 2804QualType ASTContext::getNSConstantStringType() { 2805 if (!NSConstantStringTypeDecl) { 2806 NSConstantStringTypeDecl = 2807 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2808 &Idents.get("__builtin_NSString")); 2809 NSConstantStringTypeDecl->startDefinition(); 2810 2811 QualType FieldTypes[3]; 2812 2813 // const int *isa; 2814 FieldTypes[0] = getPointerType(IntTy.withConst()); 2815 // const char *str; 2816 FieldTypes[1] = getPointerType(CharTy.withConst()); 2817 // unsigned int length; 2818 FieldTypes[2] = UnsignedIntTy; 2819 2820 // Create fields 2821 for (unsigned i = 0; i < 3; ++i) { 2822 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 2823 SourceLocation(), 0, 2824 FieldTypes[i], /*TInfo=*/0, 2825 /*BitWidth=*/0, 2826 /*Mutable=*/false); 2827 Field->setAccess(AS_public); 2828 NSConstantStringTypeDecl->addDecl(Field); 2829 } 2830 2831 NSConstantStringTypeDecl->completeDefinition(); 2832 } 2833 2834 return getTagDeclType(NSConstantStringTypeDecl); 2835} 2836 2837void ASTContext::setNSConstantStringType(QualType T) { 2838 const RecordType *Rec = T->getAs<RecordType>(); 2839 assert(Rec && "Invalid NSConstantStringType"); 2840 NSConstantStringTypeDecl = Rec->getDecl(); 2841} 2842 2843QualType ASTContext::getObjCFastEnumerationStateType() { 2844 if (!ObjCFastEnumerationStateTypeDecl) { 2845 ObjCFastEnumerationStateTypeDecl = 2846 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2847 &Idents.get("__objcFastEnumerationState")); 2848 ObjCFastEnumerationStateTypeDecl->startDefinition(); 2849 2850 QualType FieldTypes[] = { 2851 UnsignedLongTy, 2852 getPointerType(ObjCIdTypedefType), 2853 getPointerType(UnsignedLongTy), 2854 getConstantArrayType(UnsignedLongTy, 2855 llvm::APInt(32, 5), ArrayType::Normal, 0) 2856 }; 2857 2858 for (size_t i = 0; i < 4; ++i) { 2859 FieldDecl *Field = FieldDecl::Create(*this, 2860 ObjCFastEnumerationStateTypeDecl, 2861 SourceLocation(), 0, 2862 FieldTypes[i], /*TInfo=*/0, 2863 /*BitWidth=*/0, 2864 /*Mutable=*/false); 2865 Field->setAccess(AS_public); 2866 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 2867 } 2868 if (getLangOptions().CPlusPlus) 2869 if (CXXRecordDecl *CXXRD = 2870 dyn_cast<CXXRecordDecl>(ObjCFastEnumerationStateTypeDecl)) 2871 CXXRD->setEmpty(false); 2872 2873 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 2874 } 2875 2876 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 2877} 2878 2879QualType ASTContext::getBlockDescriptorType() { 2880 if (BlockDescriptorType) 2881 return getTagDeclType(BlockDescriptorType); 2882 2883 RecordDecl *T; 2884 // FIXME: Needs the FlagAppleBlock bit. 2885 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2886 &Idents.get("__block_descriptor")); 2887 T->startDefinition(); 2888 2889 QualType FieldTypes[] = { 2890 UnsignedLongTy, 2891 UnsignedLongTy, 2892 }; 2893 2894 const char *FieldNames[] = { 2895 "reserved", 2896 "Size" 2897 }; 2898 2899 for (size_t i = 0; i < 2; ++i) { 2900 FieldDecl *Field = FieldDecl::Create(*this, 2901 T, 2902 SourceLocation(), 2903 &Idents.get(FieldNames[i]), 2904 FieldTypes[i], /*TInfo=*/0, 2905 /*BitWidth=*/0, 2906 /*Mutable=*/false); 2907 Field->setAccess(AS_public); 2908 T->addDecl(Field); 2909 } 2910 2911 T->completeDefinition(); 2912 2913 BlockDescriptorType = T; 2914 2915 return getTagDeclType(BlockDescriptorType); 2916} 2917 2918void ASTContext::setBlockDescriptorType(QualType T) { 2919 const RecordType *Rec = T->getAs<RecordType>(); 2920 assert(Rec && "Invalid BlockDescriptorType"); 2921 BlockDescriptorType = Rec->getDecl(); 2922} 2923 2924QualType ASTContext::getBlockDescriptorExtendedType() { 2925 if (BlockDescriptorExtendedType) 2926 return getTagDeclType(BlockDescriptorExtendedType); 2927 2928 RecordDecl *T; 2929 // FIXME: Needs the FlagAppleBlock bit. 2930 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2931 &Idents.get("__block_descriptor_withcopydispose")); 2932 T->startDefinition(); 2933 2934 QualType FieldTypes[] = { 2935 UnsignedLongTy, 2936 UnsignedLongTy, 2937 getPointerType(VoidPtrTy), 2938 getPointerType(VoidPtrTy) 2939 }; 2940 2941 const char *FieldNames[] = { 2942 "reserved", 2943 "Size", 2944 "CopyFuncPtr", 2945 "DestroyFuncPtr" 2946 }; 2947 2948 for (size_t i = 0; i < 4; ++i) { 2949 FieldDecl *Field = FieldDecl::Create(*this, 2950 T, 2951 SourceLocation(), 2952 &Idents.get(FieldNames[i]), 2953 FieldTypes[i], /*TInfo=*/0, 2954 /*BitWidth=*/0, 2955 /*Mutable=*/false); 2956 Field->setAccess(AS_public); 2957 T->addDecl(Field); 2958 } 2959 2960 T->completeDefinition(); 2961 2962 BlockDescriptorExtendedType = T; 2963 2964 return getTagDeclType(BlockDescriptorExtendedType); 2965} 2966 2967void ASTContext::setBlockDescriptorExtendedType(QualType T) { 2968 const RecordType *Rec = T->getAs<RecordType>(); 2969 assert(Rec && "Invalid BlockDescriptorType"); 2970 BlockDescriptorExtendedType = Rec->getDecl(); 2971} 2972 2973bool ASTContext::BlockRequiresCopying(QualType Ty) { 2974 if (Ty->isBlockPointerType()) 2975 return true; 2976 if (isObjCNSObjectType(Ty)) 2977 return true; 2978 if (Ty->isObjCObjectPointerType()) 2979 return true; 2980 return false; 2981} 2982 2983QualType ASTContext::BuildByRefType(const char *DeclName, QualType Ty) { 2984 // type = struct __Block_byref_1_X { 2985 // void *__isa; 2986 // struct __Block_byref_1_X *__forwarding; 2987 // unsigned int __flags; 2988 // unsigned int __size; 2989 // void *__copy_helper; // as needed 2990 // void *__destroy_help // as needed 2991 // int X; 2992 // } * 2993 2994 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 2995 2996 // FIXME: Move up 2997 static unsigned int UniqueBlockByRefTypeID = 0; 2998 llvm::SmallString<36> Name; 2999 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3000 ++UniqueBlockByRefTypeID << '_' << DeclName; 3001 RecordDecl *T; 3002 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3003 &Idents.get(Name.str())); 3004 T->startDefinition(); 3005 QualType Int32Ty = IntTy; 3006 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3007 QualType FieldTypes[] = { 3008 getPointerType(VoidPtrTy), 3009 getPointerType(getTagDeclType(T)), 3010 Int32Ty, 3011 Int32Ty, 3012 getPointerType(VoidPtrTy), 3013 getPointerType(VoidPtrTy), 3014 Ty 3015 }; 3016 3017 const char *FieldNames[] = { 3018 "__isa", 3019 "__forwarding", 3020 "__flags", 3021 "__size", 3022 "__copy_helper", 3023 "__destroy_helper", 3024 DeclName, 3025 }; 3026 3027 for (size_t i = 0; i < 7; ++i) { 3028 if (!HasCopyAndDispose && i >=4 && i <= 5) 3029 continue; 3030 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3031 &Idents.get(FieldNames[i]), 3032 FieldTypes[i], /*TInfo=*/0, 3033 /*BitWidth=*/0, /*Mutable=*/false); 3034 Field->setAccess(AS_public); 3035 T->addDecl(Field); 3036 } 3037 3038 T->completeDefinition(); 3039 3040 return getPointerType(getTagDeclType(T)); 3041} 3042 3043 3044QualType ASTContext::getBlockParmType( 3045 bool BlockHasCopyDispose, 3046 llvm::SmallVectorImpl<const Expr *> &Layout) { 3047 3048 // FIXME: Move up 3049 static unsigned int UniqueBlockParmTypeID = 0; 3050 llvm::SmallString<36> Name; 3051 llvm::raw_svector_ostream(Name) << "__block_literal_" 3052 << ++UniqueBlockParmTypeID; 3053 RecordDecl *T; 3054 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3055 &Idents.get(Name.str())); 3056 T->startDefinition(); 3057 QualType FieldTypes[] = { 3058 getPointerType(VoidPtrTy), 3059 IntTy, 3060 IntTy, 3061 getPointerType(VoidPtrTy), 3062 (BlockHasCopyDispose ? 3063 getPointerType(getBlockDescriptorExtendedType()) : 3064 getPointerType(getBlockDescriptorType())) 3065 }; 3066 3067 const char *FieldNames[] = { 3068 "__isa", 3069 "__flags", 3070 "__reserved", 3071 "__FuncPtr", 3072 "__descriptor" 3073 }; 3074 3075 for (size_t i = 0; i < 5; ++i) { 3076 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3077 &Idents.get(FieldNames[i]), 3078 FieldTypes[i], /*TInfo=*/0, 3079 /*BitWidth=*/0, /*Mutable=*/false); 3080 Field->setAccess(AS_public); 3081 T->addDecl(Field); 3082 } 3083 3084 for (unsigned i = 0; i < Layout.size(); ++i) { 3085 const Expr *E = Layout[i]; 3086 3087 QualType FieldType = E->getType(); 3088 IdentifierInfo *FieldName = 0; 3089 if (isa<CXXThisExpr>(E)) { 3090 FieldName = &Idents.get("this"); 3091 } else if (const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E)) { 3092 const ValueDecl *D = BDRE->getDecl(); 3093 FieldName = D->getIdentifier(); 3094 if (BDRE->isByRef()) 3095 FieldType = BuildByRefType(D->getNameAsCString(), FieldType); 3096 } else { 3097 // Padding. 3098 assert(isa<ConstantArrayType>(FieldType) && 3099 isa<DeclRefExpr>(E) && 3100 !cast<DeclRefExpr>(E)->getDecl()->getDeclName() && 3101 "doesn't match characteristics of padding decl"); 3102 } 3103 3104 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3105 FieldName, FieldType, /*TInfo=*/0, 3106 /*BitWidth=*/0, /*Mutable=*/false); 3107 Field->setAccess(AS_public); 3108 T->addDecl(Field); 3109 } 3110 3111 T->completeDefinition(); 3112 3113 return getPointerType(getTagDeclType(T)); 3114} 3115 3116void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3117 const RecordType *Rec = T->getAs<RecordType>(); 3118 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3119 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3120} 3121 3122// This returns true if a type has been typedefed to BOOL: 3123// typedef <type> BOOL; 3124static bool isTypeTypedefedAsBOOL(QualType T) { 3125 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3126 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3127 return II->isStr("BOOL"); 3128 3129 return false; 3130} 3131 3132/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3133/// purpose. 3134CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) { 3135 CharUnits sz = getTypeSizeInChars(type); 3136 3137 // Make all integer and enum types at least as large as an int 3138 if (sz.isPositive() && type->isIntegralType()) 3139 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3140 // Treat arrays as pointers, since that's how they're passed in. 3141 else if (type->isArrayType()) 3142 sz = getTypeSizeInChars(VoidPtrTy); 3143 return sz; 3144} 3145 3146static inline 3147std::string charUnitsToString(const CharUnits &CU) { 3148 return llvm::itostr(CU.getQuantity()); 3149} 3150 3151/// getObjCEncodingForBlockDecl - Return the encoded type for this block 3152/// declaration. 3153void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3154 std::string& S) { 3155 const BlockDecl *Decl = Expr->getBlockDecl(); 3156 QualType BlockTy = 3157 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3158 // Encode result type. 3159 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3160 // Compute size of all parameters. 3161 // Start with computing size of a pointer in number of bytes. 3162 // FIXME: There might(should) be a better way of doing this computation! 3163 SourceLocation Loc; 3164 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3165 CharUnits ParmOffset = PtrSize; 3166 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3167 E = Decl->param_end(); PI != E; ++PI) { 3168 QualType PType = (*PI)->getType(); 3169 CharUnits sz = getObjCEncodingTypeSize(PType); 3170 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3171 ParmOffset += sz; 3172 } 3173 // Size of the argument frame 3174 S += charUnitsToString(ParmOffset); 3175 // Block pointer and offset. 3176 S += "@?0"; 3177 ParmOffset = PtrSize; 3178 3179 // Argument types. 3180 ParmOffset = PtrSize; 3181 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3182 Decl->param_end(); PI != E; ++PI) { 3183 ParmVarDecl *PVDecl = *PI; 3184 QualType PType = PVDecl->getOriginalType(); 3185 if (const ArrayType *AT = 3186 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3187 // Use array's original type only if it has known number of 3188 // elements. 3189 if (!isa<ConstantArrayType>(AT)) 3190 PType = PVDecl->getType(); 3191 } else if (PType->isFunctionType()) 3192 PType = PVDecl->getType(); 3193 getObjCEncodingForType(PType, S); 3194 S += charUnitsToString(ParmOffset); 3195 ParmOffset += getObjCEncodingTypeSize(PType); 3196 } 3197} 3198 3199/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3200/// declaration. 3201void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3202 std::string& S) { 3203 // FIXME: This is not very efficient. 3204 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3205 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3206 // Encode result type. 3207 getObjCEncodingForType(Decl->getResultType(), S); 3208 // Compute size of all parameters. 3209 // Start with computing size of a pointer in number of bytes. 3210 // FIXME: There might(should) be a better way of doing this computation! 3211 SourceLocation Loc; 3212 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3213 // The first two arguments (self and _cmd) are pointers; account for 3214 // their size. 3215 CharUnits ParmOffset = 2 * PtrSize; 3216 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3217 E = Decl->sel_param_end(); PI != E; ++PI) { 3218 QualType PType = (*PI)->getType(); 3219 CharUnits sz = getObjCEncodingTypeSize(PType); 3220 assert (sz.isPositive() && 3221 "getObjCEncodingForMethodDecl - Incomplete param type"); 3222 ParmOffset += sz; 3223 } 3224 S += charUnitsToString(ParmOffset); 3225 S += "@0:"; 3226 S += charUnitsToString(PtrSize); 3227 3228 // Argument types. 3229 ParmOffset = 2 * PtrSize; 3230 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3231 E = Decl->sel_param_end(); PI != E; ++PI) { 3232 ParmVarDecl *PVDecl = *PI; 3233 QualType PType = PVDecl->getOriginalType(); 3234 if (const ArrayType *AT = 3235 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3236 // Use array's original type only if it has known number of 3237 // elements. 3238 if (!isa<ConstantArrayType>(AT)) 3239 PType = PVDecl->getType(); 3240 } else if (PType->isFunctionType()) 3241 PType = PVDecl->getType(); 3242 // Process argument qualifiers for user supplied arguments; such as, 3243 // 'in', 'inout', etc. 3244 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3245 getObjCEncodingForType(PType, S); 3246 S += charUnitsToString(ParmOffset); 3247 ParmOffset += getObjCEncodingTypeSize(PType); 3248 } 3249} 3250 3251/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3252/// property declaration. If non-NULL, Container must be either an 3253/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3254/// NULL when getting encodings for protocol properties. 3255/// Property attributes are stored as a comma-delimited C string. The simple 3256/// attributes readonly and bycopy are encoded as single characters. The 3257/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3258/// encoded as single characters, followed by an identifier. Property types 3259/// are also encoded as a parametrized attribute. The characters used to encode 3260/// these attributes are defined by the following enumeration: 3261/// @code 3262/// enum PropertyAttributes { 3263/// kPropertyReadOnly = 'R', // property is read-only. 3264/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3265/// kPropertyByref = '&', // property is a reference to the value last assigned 3266/// kPropertyDynamic = 'D', // property is dynamic 3267/// kPropertyGetter = 'G', // followed by getter selector name 3268/// kPropertySetter = 'S', // followed by setter selector name 3269/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3270/// kPropertyType = 't' // followed by old-style type encoding. 3271/// kPropertyWeak = 'W' // 'weak' property 3272/// kPropertyStrong = 'P' // property GC'able 3273/// kPropertyNonAtomic = 'N' // property non-atomic 3274/// }; 3275/// @endcode 3276void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3277 const Decl *Container, 3278 std::string& S) { 3279 // Collect information from the property implementation decl(s). 3280 bool Dynamic = false; 3281 ObjCPropertyImplDecl *SynthesizePID = 0; 3282 3283 // FIXME: Duplicated code due to poor abstraction. 3284 if (Container) { 3285 if (const ObjCCategoryImplDecl *CID = 3286 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3287 for (ObjCCategoryImplDecl::propimpl_iterator 3288 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3289 i != e; ++i) { 3290 ObjCPropertyImplDecl *PID = *i; 3291 if (PID->getPropertyDecl() == PD) { 3292 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3293 Dynamic = true; 3294 } else { 3295 SynthesizePID = PID; 3296 } 3297 } 3298 } 3299 } else { 3300 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3301 for (ObjCCategoryImplDecl::propimpl_iterator 3302 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3303 i != e; ++i) { 3304 ObjCPropertyImplDecl *PID = *i; 3305 if (PID->getPropertyDecl() == PD) { 3306 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3307 Dynamic = true; 3308 } else { 3309 SynthesizePID = PID; 3310 } 3311 } 3312 } 3313 } 3314 } 3315 3316 // FIXME: This is not very efficient. 3317 S = "T"; 3318 3319 // Encode result type. 3320 // GCC has some special rules regarding encoding of properties which 3321 // closely resembles encoding of ivars. 3322 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3323 true /* outermost type */, 3324 true /* encoding for property */); 3325 3326 if (PD->isReadOnly()) { 3327 S += ",R"; 3328 } else { 3329 switch (PD->getSetterKind()) { 3330 case ObjCPropertyDecl::Assign: break; 3331 case ObjCPropertyDecl::Copy: S += ",C"; break; 3332 case ObjCPropertyDecl::Retain: S += ",&"; break; 3333 } 3334 } 3335 3336 // It really isn't clear at all what this means, since properties 3337 // are "dynamic by default". 3338 if (Dynamic) 3339 S += ",D"; 3340 3341 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3342 S += ",N"; 3343 3344 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3345 S += ",G"; 3346 S += PD->getGetterName().getAsString(); 3347 } 3348 3349 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3350 S += ",S"; 3351 S += PD->getSetterName().getAsString(); 3352 } 3353 3354 if (SynthesizePID) { 3355 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3356 S += ",V"; 3357 S += OID->getNameAsString(); 3358 } 3359 3360 // FIXME: OBJCGC: weak & strong 3361} 3362 3363/// getLegacyIntegralTypeEncoding - 3364/// Another legacy compatibility encoding: 32-bit longs are encoded as 3365/// 'l' or 'L' , but not always. For typedefs, we need to use 3366/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3367/// 3368void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3369 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3370 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3371 if (BT->getKind() == BuiltinType::ULong && 3372 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3373 PointeeTy = UnsignedIntTy; 3374 else 3375 if (BT->getKind() == BuiltinType::Long && 3376 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3377 PointeeTy = IntTy; 3378 } 3379 } 3380} 3381 3382void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3383 const FieldDecl *Field) { 3384 // We follow the behavior of gcc, expanding structures which are 3385 // directly pointed to, and expanding embedded structures. Note that 3386 // these rules are sufficient to prevent recursive encoding of the 3387 // same type. 3388 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3389 true /* outermost type */); 3390} 3391 3392static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 3393 switch (T->getAs<BuiltinType>()->getKind()) { 3394 default: assert(0 && "Unhandled builtin type kind"); 3395 case BuiltinType::Void: return 'v'; 3396 case BuiltinType::Bool: return 'B'; 3397 case BuiltinType::Char_U: 3398 case BuiltinType::UChar: return 'C'; 3399 case BuiltinType::UShort: return 'S'; 3400 case BuiltinType::UInt: return 'I'; 3401 case BuiltinType::ULong: 3402 return 3403 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3404 case BuiltinType::UInt128: return 'T'; 3405 case BuiltinType::ULongLong: return 'Q'; 3406 case BuiltinType::Char_S: 3407 case BuiltinType::SChar: return 'c'; 3408 case BuiltinType::Short: return 's'; 3409 case BuiltinType::Int: return 'i'; 3410 case BuiltinType::Long: 3411 return 3412 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'l' : 'q'; 3413 case BuiltinType::LongLong: return 'q'; 3414 case BuiltinType::Int128: return 't'; 3415 case BuiltinType::Float: return 'f'; 3416 case BuiltinType::Double: return 'd'; 3417 case BuiltinType::LongDouble: return 'd'; 3418 } 3419} 3420 3421static void EncodeBitField(const ASTContext *Context, std::string& S, 3422 QualType T, const FieldDecl *FD) { 3423 const Expr *E = FD->getBitWidth(); 3424 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3425 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3426 S += 'b'; 3427 // The NeXT runtime encodes bit fields as b followed by the number of bits. 3428 // The GNU runtime requires more information; bitfields are encoded as b, 3429 // then the offset (in bits) of the first element, then the type of the 3430 // bitfield, then the size in bits. For example, in this structure: 3431 // 3432 // struct 3433 // { 3434 // int integer; 3435 // int flags:2; 3436 // }; 3437 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 3438 // runtime, but b32i2 for the GNU runtime. The reason for this extra 3439 // information is not especially sensible, but we're stuck with it for 3440 // compatibility with GCC, although providing it breaks anything that 3441 // actually uses runtime introspection and wants to work on both runtimes... 3442 if (!Ctx->getLangOptions().NeXTRuntime) { 3443 const RecordDecl *RD = FD->getParent(); 3444 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 3445 // FIXME: This same linear search is also used in ExprConstant - it might 3446 // be better if the FieldDecl stored its offset. We'd be increasing the 3447 // size of the object slightly, but saving some time every time it is used. 3448 unsigned i = 0; 3449 for (RecordDecl::field_iterator Field = RD->field_begin(), 3450 FieldEnd = RD->field_end(); 3451 Field != FieldEnd; (void)++Field, ++i) { 3452 if (*Field == FD) 3453 break; 3454 } 3455 S += llvm::utostr(RL.getFieldOffset(i)); 3456 S += ObjCEncodingForPrimitiveKind(Context, T); 3457 } 3458 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3459 S += llvm::utostr(N); 3460} 3461 3462// FIXME: Use SmallString for accumulating string. 3463void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3464 bool ExpandPointedToStructures, 3465 bool ExpandStructures, 3466 const FieldDecl *FD, 3467 bool OutermostType, 3468 bool EncodingProperty) { 3469 if (T->getAs<BuiltinType>()) { 3470 if (FD && FD->isBitField()) 3471 return EncodeBitField(this, S, T, FD); 3472 S += ObjCEncodingForPrimitiveKind(this, T); 3473 return; 3474 } 3475 3476 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3477 S += 'j'; 3478 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3479 false); 3480 return; 3481 } 3482 3483 // encoding for pointer or r3eference types. 3484 QualType PointeeTy; 3485 if (const PointerType *PT = T->getAs<PointerType>()) { 3486 if (PT->isObjCSelType()) { 3487 S += ':'; 3488 return; 3489 } 3490 PointeeTy = PT->getPointeeType(); 3491 } 3492 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3493 PointeeTy = RT->getPointeeType(); 3494 if (!PointeeTy.isNull()) { 3495 bool isReadOnly = false; 3496 // For historical/compatibility reasons, the read-only qualifier of the 3497 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3498 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3499 // Also, do not emit the 'r' for anything but the outermost type! 3500 if (isa<TypedefType>(T.getTypePtr())) { 3501 if (OutermostType && T.isConstQualified()) { 3502 isReadOnly = true; 3503 S += 'r'; 3504 } 3505 } else if (OutermostType) { 3506 QualType P = PointeeTy; 3507 while (P->getAs<PointerType>()) 3508 P = P->getAs<PointerType>()->getPointeeType(); 3509 if (P.isConstQualified()) { 3510 isReadOnly = true; 3511 S += 'r'; 3512 } 3513 } 3514 if (isReadOnly) { 3515 // Another legacy compatibility encoding. Some ObjC qualifier and type 3516 // combinations need to be rearranged. 3517 // Rewrite "in const" from "nr" to "rn" 3518 if (llvm::StringRef(S).endswith("nr")) 3519 S.replace(S.end()-2, S.end(), "rn"); 3520 } 3521 3522 if (PointeeTy->isCharType()) { 3523 // char pointer types should be encoded as '*' unless it is a 3524 // type that has been typedef'd to 'BOOL'. 3525 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3526 S += '*'; 3527 return; 3528 } 3529 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3530 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3531 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3532 S += '#'; 3533 return; 3534 } 3535 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3536 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3537 S += '@'; 3538 return; 3539 } 3540 // fall through... 3541 } 3542 S += '^'; 3543 getLegacyIntegralTypeEncoding(PointeeTy); 3544 3545 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3546 NULL); 3547 return; 3548 } 3549 3550 if (const ArrayType *AT = 3551 // Ignore type qualifiers etc. 3552 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3553 if (isa<IncompleteArrayType>(AT)) { 3554 // Incomplete arrays are encoded as a pointer to the array element. 3555 S += '^'; 3556 3557 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3558 false, ExpandStructures, FD); 3559 } else { 3560 S += '['; 3561 3562 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3563 S += llvm::utostr(CAT->getSize().getZExtValue()); 3564 else { 3565 //Variable length arrays are encoded as a regular array with 0 elements. 3566 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3567 S += '0'; 3568 } 3569 3570 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3571 false, ExpandStructures, FD); 3572 S += ']'; 3573 } 3574 return; 3575 } 3576 3577 if (T->getAs<FunctionType>()) { 3578 S += '?'; 3579 return; 3580 } 3581 3582 if (const RecordType *RTy = T->getAs<RecordType>()) { 3583 RecordDecl *RDecl = RTy->getDecl(); 3584 S += RDecl->isUnion() ? '(' : '{'; 3585 // Anonymous structures print as '?' 3586 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3587 S += II->getName(); 3588 if (ClassTemplateSpecializationDecl *Spec 3589 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 3590 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 3591 std::string TemplateArgsStr 3592 = TemplateSpecializationType::PrintTemplateArgumentList( 3593 TemplateArgs.getFlatArgumentList(), 3594 TemplateArgs.flat_size(), 3595 (*this).PrintingPolicy); 3596 3597 S += TemplateArgsStr; 3598 } 3599 } else { 3600 S += '?'; 3601 } 3602 if (ExpandStructures) { 3603 S += '='; 3604 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3605 FieldEnd = RDecl->field_end(); 3606 Field != FieldEnd; ++Field) { 3607 if (FD) { 3608 S += '"'; 3609 S += Field->getNameAsString(); 3610 S += '"'; 3611 } 3612 3613 // Special case bit-fields. 3614 if (Field->isBitField()) { 3615 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3616 (*Field)); 3617 } else { 3618 QualType qt = Field->getType(); 3619 getLegacyIntegralTypeEncoding(qt); 3620 getObjCEncodingForTypeImpl(qt, S, false, true, 3621 FD); 3622 } 3623 } 3624 } 3625 S += RDecl->isUnion() ? ')' : '}'; 3626 return; 3627 } 3628 3629 if (T->isEnumeralType()) { 3630 if (FD && FD->isBitField()) 3631 EncodeBitField(this, S, T, FD); 3632 else 3633 S += 'i'; 3634 return; 3635 } 3636 3637 if (T->isBlockPointerType()) { 3638 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3639 return; 3640 } 3641 3642 // Ignore protocol qualifiers when mangling at this level. 3643 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 3644 T = OT->getBaseType(); 3645 3646 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3647 // @encode(class_name) 3648 ObjCInterfaceDecl *OI = OIT->getDecl(); 3649 S += '{'; 3650 const IdentifierInfo *II = OI->getIdentifier(); 3651 S += II->getName(); 3652 S += '='; 3653 llvm::SmallVector<FieldDecl*, 32> RecFields; 3654 CollectObjCIvars(OI, RecFields); 3655 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 3656 if (RecFields[i]->isBitField()) 3657 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3658 RecFields[i]); 3659 else 3660 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3661 FD); 3662 } 3663 S += '}'; 3664 return; 3665 } 3666 3667 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 3668 if (OPT->isObjCIdType()) { 3669 S += '@'; 3670 return; 3671 } 3672 3673 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 3674 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 3675 // Since this is a binary compatibility issue, need to consult with runtime 3676 // folks. Fortunately, this is a *very* obsure construct. 3677 S += '#'; 3678 return; 3679 } 3680 3681 if (OPT->isObjCQualifiedIdType()) { 3682 getObjCEncodingForTypeImpl(getObjCIdType(), S, 3683 ExpandPointedToStructures, 3684 ExpandStructures, FD); 3685 if (FD || EncodingProperty) { 3686 // Note that we do extended encoding of protocol qualifer list 3687 // Only when doing ivar or property encoding. 3688 S += '"'; 3689 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3690 E = OPT->qual_end(); I != E; ++I) { 3691 S += '<'; 3692 S += (*I)->getNameAsString(); 3693 S += '>'; 3694 } 3695 S += '"'; 3696 } 3697 return; 3698 } 3699 3700 QualType PointeeTy = OPT->getPointeeType(); 3701 if (!EncodingProperty && 3702 isa<TypedefType>(PointeeTy.getTypePtr())) { 3703 // Another historical/compatibility reason. 3704 // We encode the underlying type which comes out as 3705 // {...}; 3706 S += '^'; 3707 getObjCEncodingForTypeImpl(PointeeTy, S, 3708 false, ExpandPointedToStructures, 3709 NULL); 3710 return; 3711 } 3712 3713 S += '@'; 3714 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 3715 S += '"'; 3716 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 3717 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3718 E = OPT->qual_end(); I != E; ++I) { 3719 S += '<'; 3720 S += (*I)->getNameAsString(); 3721 S += '>'; 3722 } 3723 S += '"'; 3724 } 3725 return; 3726 } 3727 3728 // gcc just blithely ignores member pointers. 3729 // TODO: maybe there should be a mangling for these 3730 if (T->getAs<MemberPointerType>()) 3731 return; 3732 3733 assert(0 && "@encode for type not implemented!"); 3734} 3735 3736void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 3737 std::string& S) const { 3738 if (QT & Decl::OBJC_TQ_In) 3739 S += 'n'; 3740 if (QT & Decl::OBJC_TQ_Inout) 3741 S += 'N'; 3742 if (QT & Decl::OBJC_TQ_Out) 3743 S += 'o'; 3744 if (QT & Decl::OBJC_TQ_Bycopy) 3745 S += 'O'; 3746 if (QT & Decl::OBJC_TQ_Byref) 3747 S += 'R'; 3748 if (QT & Decl::OBJC_TQ_Oneway) 3749 S += 'V'; 3750} 3751 3752void ASTContext::setBuiltinVaListType(QualType T) { 3753 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 3754 3755 BuiltinVaListType = T; 3756} 3757 3758void ASTContext::setObjCIdType(QualType T) { 3759 ObjCIdTypedefType = T; 3760} 3761 3762void ASTContext::setObjCSelType(QualType T) { 3763 ObjCSelTypedefType = T; 3764} 3765 3766void ASTContext::setObjCProtoType(QualType QT) { 3767 ObjCProtoType = QT; 3768} 3769 3770void ASTContext::setObjCClassType(QualType T) { 3771 ObjCClassTypedefType = T; 3772} 3773 3774void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 3775 assert(ObjCConstantStringType.isNull() && 3776 "'NSConstantString' type already set!"); 3777 3778 ObjCConstantStringType = getObjCInterfaceType(Decl); 3779} 3780 3781/// \brief Retrieve the template name that corresponds to a non-empty 3782/// lookup. 3783TemplateName ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 3784 UnresolvedSetIterator End) { 3785 unsigned size = End - Begin; 3786 assert(size > 1 && "set is not overloaded!"); 3787 3788 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 3789 size * sizeof(FunctionTemplateDecl*)); 3790 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 3791 3792 NamedDecl **Storage = OT->getStorage(); 3793 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 3794 NamedDecl *D = *I; 3795 assert(isa<FunctionTemplateDecl>(D) || 3796 (isa<UsingShadowDecl>(D) && 3797 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 3798 *Storage++ = D; 3799 } 3800 3801 return TemplateName(OT); 3802} 3803 3804/// \brief Retrieve the template name that represents a qualified 3805/// template name such as \c std::vector. 3806TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 3807 bool TemplateKeyword, 3808 TemplateDecl *Template) { 3809 // FIXME: Canonicalization? 3810 llvm::FoldingSetNodeID ID; 3811 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 3812 3813 void *InsertPos = 0; 3814 QualifiedTemplateName *QTN = 3815 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3816 if (!QTN) { 3817 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 3818 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 3819 } 3820 3821 return TemplateName(QTN); 3822} 3823 3824/// \brief Retrieve the template name that represents a dependent 3825/// template name such as \c MetaFun::template apply. 3826TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3827 const IdentifierInfo *Name) { 3828 assert((!NNS || NNS->isDependent()) && 3829 "Nested name specifier must be dependent"); 3830 3831 llvm::FoldingSetNodeID ID; 3832 DependentTemplateName::Profile(ID, NNS, Name); 3833 3834 void *InsertPos = 0; 3835 DependentTemplateName *QTN = 3836 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3837 3838 if (QTN) 3839 return TemplateName(QTN); 3840 3841 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3842 if (CanonNNS == NNS) { 3843 QTN = new (*this,4) DependentTemplateName(NNS, Name); 3844 } else { 3845 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 3846 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 3847 DependentTemplateName *CheckQTN = 3848 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3849 assert(!CheckQTN && "Dependent type name canonicalization broken"); 3850 (void)CheckQTN; 3851 } 3852 3853 DependentTemplateNames.InsertNode(QTN, InsertPos); 3854 return TemplateName(QTN); 3855} 3856 3857/// \brief Retrieve the template name that represents a dependent 3858/// template name such as \c MetaFun::template operator+. 3859TemplateName 3860ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3861 OverloadedOperatorKind Operator) { 3862 assert((!NNS || NNS->isDependent()) && 3863 "Nested name specifier must be dependent"); 3864 3865 llvm::FoldingSetNodeID ID; 3866 DependentTemplateName::Profile(ID, NNS, Operator); 3867 3868 void *InsertPos = 0; 3869 DependentTemplateName *QTN 3870 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3871 3872 if (QTN) 3873 return TemplateName(QTN); 3874 3875 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3876 if (CanonNNS == NNS) { 3877 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 3878 } else { 3879 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 3880 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 3881 3882 DependentTemplateName *CheckQTN 3883 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3884 assert(!CheckQTN && "Dependent template name canonicalization broken"); 3885 (void)CheckQTN; 3886 } 3887 3888 DependentTemplateNames.InsertNode(QTN, InsertPos); 3889 return TemplateName(QTN); 3890} 3891 3892/// getFromTargetType - Given one of the integer types provided by 3893/// TargetInfo, produce the corresponding type. The unsigned @p Type 3894/// is actually a value of type @c TargetInfo::IntType. 3895CanQualType ASTContext::getFromTargetType(unsigned Type) const { 3896 switch (Type) { 3897 case TargetInfo::NoInt: return CanQualType(); 3898 case TargetInfo::SignedShort: return ShortTy; 3899 case TargetInfo::UnsignedShort: return UnsignedShortTy; 3900 case TargetInfo::SignedInt: return IntTy; 3901 case TargetInfo::UnsignedInt: return UnsignedIntTy; 3902 case TargetInfo::SignedLong: return LongTy; 3903 case TargetInfo::UnsignedLong: return UnsignedLongTy; 3904 case TargetInfo::SignedLongLong: return LongLongTy; 3905 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 3906 } 3907 3908 assert(false && "Unhandled TargetInfo::IntType value"); 3909 return CanQualType(); 3910} 3911 3912//===----------------------------------------------------------------------===// 3913// Type Predicates. 3914//===----------------------------------------------------------------------===// 3915 3916/// isObjCNSObjectType - Return true if this is an NSObject object using 3917/// NSObject attribute on a c-style pointer type. 3918/// FIXME - Make it work directly on types. 3919/// FIXME: Move to Type. 3920/// 3921bool ASTContext::isObjCNSObjectType(QualType Ty) const { 3922 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 3923 if (TypedefDecl *TD = TDT->getDecl()) 3924 if (TD->getAttr<ObjCNSObjectAttr>()) 3925 return true; 3926 } 3927 return false; 3928} 3929 3930/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 3931/// garbage collection attribute. 3932/// 3933Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 3934 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 3935 if (getLangOptions().ObjC1 && 3936 getLangOptions().getGCMode() != LangOptions::NonGC) { 3937 GCAttrs = Ty.getObjCGCAttr(); 3938 // Default behavious under objective-c's gc is for objective-c pointers 3939 // (or pointers to them) be treated as though they were declared 3940 // as __strong. 3941 if (GCAttrs == Qualifiers::GCNone) { 3942 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 3943 GCAttrs = Qualifiers::Strong; 3944 else if (Ty->isPointerType()) 3945 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 3946 } 3947 // Non-pointers have none gc'able attribute regardless of the attribute 3948 // set on them. 3949 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 3950 return Qualifiers::GCNone; 3951 } 3952 return GCAttrs; 3953} 3954 3955//===----------------------------------------------------------------------===// 3956// Type Compatibility Testing 3957//===----------------------------------------------------------------------===// 3958 3959/// areCompatVectorTypes - Return true if the two specified vector types are 3960/// compatible. 3961static bool areCompatVectorTypes(const VectorType *LHS, 3962 const VectorType *RHS) { 3963 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 3964 return LHS->getElementType() == RHS->getElementType() && 3965 LHS->getNumElements() == RHS->getNumElements(); 3966} 3967 3968//===----------------------------------------------------------------------===// 3969// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 3970//===----------------------------------------------------------------------===// 3971 3972/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 3973/// inheritance hierarchy of 'rProto'. 3974bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 3975 ObjCProtocolDecl *rProto) { 3976 if (lProto == rProto) 3977 return true; 3978 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 3979 E = rProto->protocol_end(); PI != E; ++PI) 3980 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 3981 return true; 3982 return false; 3983} 3984 3985/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 3986/// return true if lhs's protocols conform to rhs's protocol; false 3987/// otherwise. 3988bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 3989 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 3990 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 3991 return false; 3992} 3993 3994/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 3995/// ObjCQualifiedIDType. 3996bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 3997 bool compare) { 3998 // Allow id<P..> and an 'id' or void* type in all cases. 3999 if (lhs->isVoidPointerType() || 4000 lhs->isObjCIdType() || lhs->isObjCClassType()) 4001 return true; 4002 else if (rhs->isVoidPointerType() || 4003 rhs->isObjCIdType() || rhs->isObjCClassType()) 4004 return true; 4005 4006 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4007 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4008 4009 if (!rhsOPT) return false; 4010 4011 if (rhsOPT->qual_empty()) { 4012 // If the RHS is a unqualified interface pointer "NSString*", 4013 // make sure we check the class hierarchy. 4014 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4015 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4016 E = lhsQID->qual_end(); I != E; ++I) { 4017 // when comparing an id<P> on lhs with a static type on rhs, 4018 // see if static class implements all of id's protocols, directly or 4019 // through its super class and categories. 4020 if (!rhsID->ClassImplementsProtocol(*I, true)) 4021 return false; 4022 } 4023 } 4024 // If there are no qualifiers and no interface, we have an 'id'. 4025 return true; 4026 } 4027 // Both the right and left sides have qualifiers. 4028 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4029 E = lhsQID->qual_end(); I != E; ++I) { 4030 ObjCProtocolDecl *lhsProto = *I; 4031 bool match = false; 4032 4033 // when comparing an id<P> on lhs with a static type on rhs, 4034 // see if static class implements all of id's protocols, directly or 4035 // through its super class and categories. 4036 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4037 E = rhsOPT->qual_end(); J != E; ++J) { 4038 ObjCProtocolDecl *rhsProto = *J; 4039 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4040 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4041 match = true; 4042 break; 4043 } 4044 } 4045 // If the RHS is a qualified interface pointer "NSString<P>*", 4046 // make sure we check the class hierarchy. 4047 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4048 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4049 E = lhsQID->qual_end(); I != E; ++I) { 4050 // when comparing an id<P> on lhs with a static type on rhs, 4051 // see if static class implements all of id's protocols, directly or 4052 // through its super class and categories. 4053 if (rhsID->ClassImplementsProtocol(*I, true)) { 4054 match = true; 4055 break; 4056 } 4057 } 4058 } 4059 if (!match) 4060 return false; 4061 } 4062 4063 return true; 4064 } 4065 4066 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4067 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4068 4069 if (const ObjCObjectPointerType *lhsOPT = 4070 lhs->getAsObjCInterfacePointerType()) { 4071 if (lhsOPT->qual_empty()) { 4072 bool match = false; 4073 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4074 for (ObjCObjectPointerType::qual_iterator I = rhsQID->qual_begin(), 4075 E = rhsQID->qual_end(); I != E; ++I) { 4076 // when comparing an id<P> on lhs with a static type on rhs, 4077 // see if static class implements all of id's protocols, directly or 4078 // through its super class and categories. 4079 if (lhsID->ClassImplementsProtocol(*I, true)) { 4080 match = true; 4081 break; 4082 } 4083 } 4084 if (!match) 4085 return false; 4086 } 4087 return true; 4088 } 4089 // Both the right and left sides have qualifiers. 4090 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4091 E = lhsOPT->qual_end(); I != E; ++I) { 4092 ObjCProtocolDecl *lhsProto = *I; 4093 bool match = false; 4094 4095 // when comparing an id<P> on lhs with a static type on rhs, 4096 // see if static class implements all of id's protocols, directly or 4097 // through its super class and categories. 4098 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4099 E = rhsQID->qual_end(); J != E; ++J) { 4100 ObjCProtocolDecl *rhsProto = *J; 4101 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4102 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4103 match = true; 4104 break; 4105 } 4106 } 4107 if (!match) 4108 return false; 4109 } 4110 return true; 4111 } 4112 return false; 4113} 4114 4115/// canAssignObjCInterfaces - Return true if the two interface types are 4116/// compatible for assignment from RHS to LHS. This handles validation of any 4117/// protocol qualifiers on the LHS or RHS. 4118/// 4119bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4120 const ObjCObjectPointerType *RHSOPT) { 4121 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4122 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4123 4124 // If either type represents the built-in 'id' or 'Class' types, return true. 4125 if (LHS->isObjCUnqualifiedIdOrClass() || 4126 RHS->isObjCUnqualifiedIdOrClass()) 4127 return true; 4128 4129 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 4130 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4131 QualType(RHSOPT,0), 4132 false); 4133 4134 // If we have 2 user-defined types, fall into that path. 4135 if (LHS->getInterface() && RHS->getInterface()) 4136 return canAssignObjCInterfaces(LHS, RHS); 4137 4138 return false; 4139} 4140 4141/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4142/// for providing type-safty for objective-c pointers used to pass/return 4143/// arguments in block literals. When passed as arguments, passing 'A*' where 4144/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4145/// not OK. For the return type, the opposite is not OK. 4146bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4147 const ObjCObjectPointerType *LHSOPT, 4148 const ObjCObjectPointerType *RHSOPT) { 4149 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4150 return true; 4151 4152 if (LHSOPT->isObjCBuiltinType()) { 4153 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4154 } 4155 4156 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4157 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4158 QualType(RHSOPT,0), 4159 false); 4160 4161 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4162 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4163 if (LHS && RHS) { // We have 2 user-defined types. 4164 if (LHS != RHS) { 4165 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4166 return false; 4167 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4168 return true; 4169 } 4170 else 4171 return true; 4172 } 4173 return false; 4174} 4175 4176/// getIntersectionOfProtocols - This routine finds the intersection of set 4177/// of protocols inherited from two distinct objective-c pointer objects. 4178/// It is used to build composite qualifier list of the composite type of 4179/// the conditional expression involving two objective-c pointer objects. 4180static 4181void getIntersectionOfProtocols(ASTContext &Context, 4182 const ObjCObjectPointerType *LHSOPT, 4183 const ObjCObjectPointerType *RHSOPT, 4184 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4185 4186 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4187 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4188 assert(LHS->getInterface() && "LHS must have an interface base"); 4189 assert(RHS->getInterface() && "RHS must have an interface base"); 4190 4191 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4192 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4193 if (LHSNumProtocols > 0) 4194 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4195 else { 4196 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4197 Context.CollectInheritedProtocols(LHS->getInterface(), 4198 LHSInheritedProtocols); 4199 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4200 LHSInheritedProtocols.end()); 4201 } 4202 4203 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4204 if (RHSNumProtocols > 0) { 4205 ObjCProtocolDecl **RHSProtocols = 4206 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4207 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4208 if (InheritedProtocolSet.count(RHSProtocols[i])) 4209 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4210 } 4211 else { 4212 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4213 Context.CollectInheritedProtocols(RHS->getInterface(), 4214 RHSInheritedProtocols); 4215 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4216 RHSInheritedProtocols.begin(), 4217 E = RHSInheritedProtocols.end(); I != E; ++I) 4218 if (InheritedProtocolSet.count((*I))) 4219 IntersectionOfProtocols.push_back((*I)); 4220 } 4221} 4222 4223/// areCommonBaseCompatible - Returns common base class of the two classes if 4224/// one found. Note that this is O'2 algorithm. But it will be called as the 4225/// last type comparison in a ?-exp of ObjC pointer types before a 4226/// warning is issued. So, its invokation is extremely rare. 4227QualType ASTContext::areCommonBaseCompatible( 4228 const ObjCObjectPointerType *Lptr, 4229 const ObjCObjectPointerType *Rptr) { 4230 const ObjCObjectType *LHS = Lptr->getObjectType(); 4231 const ObjCObjectType *RHS = Rptr->getObjectType(); 4232 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 4233 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 4234 if (!LDecl || !RDecl) 4235 return QualType(); 4236 4237 while ((LDecl = LDecl->getSuperClass())) { 4238 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 4239 if (canAssignObjCInterfaces(LHS, RHS)) { 4240 llvm::SmallVector<ObjCProtocolDecl *, 8> Protocols; 4241 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 4242 4243 QualType Result = QualType(LHS, 0); 4244 if (!Protocols.empty()) 4245 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 4246 Result = getObjCObjectPointerType(Result); 4247 return Result; 4248 } 4249 } 4250 4251 return QualType(); 4252} 4253 4254bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 4255 const ObjCObjectType *RHS) { 4256 assert(LHS->getInterface() && "LHS is not an interface type"); 4257 assert(RHS->getInterface() && "RHS is not an interface type"); 4258 4259 // Verify that the base decls are compatible: the RHS must be a subclass of 4260 // the LHS. 4261 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 4262 return false; 4263 4264 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4265 // protocol qualified at all, then we are good. 4266 if (LHS->getNumProtocols() == 0) 4267 return true; 4268 4269 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4270 // isn't a superset. 4271 if (RHS->getNumProtocols() == 0) 4272 return true; // FIXME: should return false! 4273 4274 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 4275 LHSPE = LHS->qual_end(); 4276 LHSPI != LHSPE; LHSPI++) { 4277 bool RHSImplementsProtocol = false; 4278 4279 // If the RHS doesn't implement the protocol on the left, the types 4280 // are incompatible. 4281 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 4282 RHSPE = RHS->qual_end(); 4283 RHSPI != RHSPE; RHSPI++) { 4284 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4285 RHSImplementsProtocol = true; 4286 break; 4287 } 4288 } 4289 // FIXME: For better diagnostics, consider passing back the protocol name. 4290 if (!RHSImplementsProtocol) 4291 return false; 4292 } 4293 // The RHS implements all protocols listed on the LHS. 4294 return true; 4295} 4296 4297bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4298 // get the "pointed to" types 4299 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4300 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4301 4302 if (!LHSOPT || !RHSOPT) 4303 return false; 4304 4305 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4306 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4307} 4308 4309/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4310/// both shall have the identically qualified version of a compatible type. 4311/// C99 6.2.7p1: Two types have compatible types if their types are the 4312/// same. See 6.7.[2,3,5] for additional rules. 4313bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 4314 if (getLangOptions().CPlusPlus) 4315 return hasSameType(LHS, RHS); 4316 4317 return !mergeTypes(LHS, RHS).isNull(); 4318} 4319 4320bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 4321 return !mergeTypes(LHS, RHS, true).isNull(); 4322} 4323 4324QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 4325 bool OfBlockPointer) { 4326 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4327 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4328 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4329 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4330 bool allLTypes = true; 4331 bool allRTypes = true; 4332 4333 // Check return type 4334 QualType retType; 4335 if (OfBlockPointer) 4336 retType = mergeTypes(rbase->getResultType(), lbase->getResultType(), true); 4337 else 4338 retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 4339 if (retType.isNull()) return QualType(); 4340 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 4341 allLTypes = false; 4342 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 4343 allRTypes = false; 4344 // FIXME: double check this 4345 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 4346 // rbase->getRegParmAttr() != 0 && 4347 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 4348 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 4349 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 4350 unsigned RegParm = lbaseInfo.getRegParm() == 0 ? rbaseInfo.getRegParm() : 4351 lbaseInfo.getRegParm(); 4352 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 4353 if (NoReturn != lbaseInfo.getNoReturn() || 4354 RegParm != lbaseInfo.getRegParm()) 4355 allLTypes = false; 4356 if (NoReturn != rbaseInfo.getNoReturn() || 4357 RegParm != rbaseInfo.getRegParm()) 4358 allRTypes = false; 4359 CallingConv lcc = lbaseInfo.getCC(); 4360 CallingConv rcc = rbaseInfo.getCC(); 4361 // Compatible functions must have compatible calling conventions 4362 if (!isSameCallConv(lcc, rcc)) 4363 return QualType(); 4364 4365 if (lproto && rproto) { // two C99 style function prototypes 4366 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4367 "C++ shouldn't be here"); 4368 unsigned lproto_nargs = lproto->getNumArgs(); 4369 unsigned rproto_nargs = rproto->getNumArgs(); 4370 4371 // Compatible functions must have the same number of arguments 4372 if (lproto_nargs != rproto_nargs) 4373 return QualType(); 4374 4375 // Variadic and non-variadic functions aren't compatible 4376 if (lproto->isVariadic() != rproto->isVariadic()) 4377 return QualType(); 4378 4379 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4380 return QualType(); 4381 4382 // Check argument compatibility 4383 llvm::SmallVector<QualType, 10> types; 4384 for (unsigned i = 0; i < lproto_nargs; i++) { 4385 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4386 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4387 QualType argtype = mergeTypes(largtype, rargtype, OfBlockPointer); 4388 if (argtype.isNull()) return QualType(); 4389 types.push_back(argtype); 4390 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4391 allLTypes = false; 4392 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4393 allRTypes = false; 4394 } 4395 if (allLTypes) return lhs; 4396 if (allRTypes) return rhs; 4397 return getFunctionType(retType, types.begin(), types.size(), 4398 lproto->isVariadic(), lproto->getTypeQuals(), 4399 false, false, 0, 0, 4400 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4401 } 4402 4403 if (lproto) allRTypes = false; 4404 if (rproto) allLTypes = false; 4405 4406 const FunctionProtoType *proto = lproto ? lproto : rproto; 4407 if (proto) { 4408 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4409 if (proto->isVariadic()) return QualType(); 4410 // Check that the types are compatible with the types that 4411 // would result from default argument promotions (C99 6.7.5.3p15). 4412 // The only types actually affected are promotable integer 4413 // types and floats, which would be passed as a different 4414 // type depending on whether the prototype is visible. 4415 unsigned proto_nargs = proto->getNumArgs(); 4416 for (unsigned i = 0; i < proto_nargs; ++i) { 4417 QualType argTy = proto->getArgType(i); 4418 4419 // Look at the promotion type of enum types, since that is the type used 4420 // to pass enum values. 4421 if (const EnumType *Enum = argTy->getAs<EnumType>()) 4422 argTy = Enum->getDecl()->getPromotionType(); 4423 4424 if (argTy->isPromotableIntegerType() || 4425 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4426 return QualType(); 4427 } 4428 4429 if (allLTypes) return lhs; 4430 if (allRTypes) return rhs; 4431 return getFunctionType(retType, proto->arg_type_begin(), 4432 proto->getNumArgs(), proto->isVariadic(), 4433 proto->getTypeQuals(), 4434 false, false, 0, 0, 4435 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4436 } 4437 4438 if (allLTypes) return lhs; 4439 if (allRTypes) return rhs; 4440 FunctionType::ExtInfo Info(NoReturn, RegParm, lcc); 4441 return getFunctionNoProtoType(retType, Info); 4442} 4443 4444QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 4445 bool OfBlockPointer) { 4446 // C++ [expr]: If an expression initially has the type "reference to T", the 4447 // type is adjusted to "T" prior to any further analysis, the expression 4448 // designates the object or function denoted by the reference, and the 4449 // expression is an lvalue unless the reference is an rvalue reference and 4450 // the expression is a function call (possibly inside parentheses). 4451 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 4452 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 4453 4454 QualType LHSCan = getCanonicalType(LHS), 4455 RHSCan = getCanonicalType(RHS); 4456 4457 // If two types are identical, they are compatible. 4458 if (LHSCan == RHSCan) 4459 return LHS; 4460 4461 // If the qualifiers are different, the types aren't compatible... mostly. 4462 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4463 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4464 if (LQuals != RQuals) { 4465 // If any of these qualifiers are different, we have a type 4466 // mismatch. 4467 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4468 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4469 return QualType(); 4470 4471 // Exactly one GC qualifier difference is allowed: __strong is 4472 // okay if the other type has no GC qualifier but is an Objective 4473 // C object pointer (i.e. implicitly strong by default). We fix 4474 // this by pretending that the unqualified type was actually 4475 // qualified __strong. 4476 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4477 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4478 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4479 4480 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4481 return QualType(); 4482 4483 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4484 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4485 } 4486 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4487 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4488 } 4489 return QualType(); 4490 } 4491 4492 // Okay, qualifiers are equal. 4493 4494 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4495 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4496 4497 // We want to consider the two function types to be the same for these 4498 // comparisons, just force one to the other. 4499 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 4500 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 4501 4502 // Same as above for arrays 4503 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 4504 LHSClass = Type::ConstantArray; 4505 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 4506 RHSClass = Type::ConstantArray; 4507 4508 // ObjCInterfaces are just specialized ObjCObjects. 4509 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 4510 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 4511 4512 // Canonicalize ExtVector -> Vector. 4513 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 4514 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 4515 4516 // If the canonical type classes don't match. 4517 if (LHSClass != RHSClass) { 4518 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 4519 // a signed integer type, or an unsigned integer type. 4520 // Compatibility is based on the underlying type, not the promotion 4521 // type. 4522 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 4523 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 4524 return RHS; 4525 } 4526 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 4527 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 4528 return LHS; 4529 } 4530 4531 return QualType(); 4532 } 4533 4534 // The canonical type classes match. 4535 switch (LHSClass) { 4536#define TYPE(Class, Base) 4537#define ABSTRACT_TYPE(Class, Base) 4538#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 4539#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4540#define DEPENDENT_TYPE(Class, Base) case Type::Class: 4541#include "clang/AST/TypeNodes.def" 4542 assert(false && "Non-canonical and dependent types shouldn't get here"); 4543 return QualType(); 4544 4545 case Type::LValueReference: 4546 case Type::RValueReference: 4547 case Type::MemberPointer: 4548 assert(false && "C++ should never be in mergeTypes"); 4549 return QualType(); 4550 4551 case Type::ObjCInterface: 4552 case Type::IncompleteArray: 4553 case Type::VariableArray: 4554 case Type::FunctionProto: 4555 case Type::ExtVector: 4556 assert(false && "Types are eliminated above"); 4557 return QualType(); 4558 4559 case Type::Pointer: 4560 { 4561 // Merge two pointer types, while trying to preserve typedef info 4562 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 4563 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 4564 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 4565 if (ResultType.isNull()) return QualType(); 4566 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4567 return LHS; 4568 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4569 return RHS; 4570 return getPointerType(ResultType); 4571 } 4572 case Type::BlockPointer: 4573 { 4574 // Merge two block pointer types, while trying to preserve typedef info 4575 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 4576 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 4577 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer); 4578 if (ResultType.isNull()) return QualType(); 4579 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4580 return LHS; 4581 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4582 return RHS; 4583 return getBlockPointerType(ResultType); 4584 } 4585 case Type::ConstantArray: 4586 { 4587 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 4588 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 4589 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 4590 return QualType(); 4591 4592 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 4593 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 4594 QualType ResultType = mergeTypes(LHSElem, RHSElem); 4595 if (ResultType.isNull()) return QualType(); 4596 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4597 return LHS; 4598 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4599 return RHS; 4600 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 4601 ArrayType::ArraySizeModifier(), 0); 4602 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 4603 ArrayType::ArraySizeModifier(), 0); 4604 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 4605 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 4606 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4607 return LHS; 4608 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4609 return RHS; 4610 if (LVAT) { 4611 // FIXME: This isn't correct! But tricky to implement because 4612 // the array's size has to be the size of LHS, but the type 4613 // has to be different. 4614 return LHS; 4615 } 4616 if (RVAT) { 4617 // FIXME: This isn't correct! But tricky to implement because 4618 // the array's size has to be the size of RHS, but the type 4619 // has to be different. 4620 return RHS; 4621 } 4622 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 4623 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 4624 return getIncompleteArrayType(ResultType, 4625 ArrayType::ArraySizeModifier(), 0); 4626 } 4627 case Type::FunctionNoProto: 4628 return mergeFunctionTypes(LHS, RHS, OfBlockPointer); 4629 case Type::Record: 4630 case Type::Enum: 4631 return QualType(); 4632 case Type::Builtin: 4633 // Only exactly equal builtin types are compatible, which is tested above. 4634 return QualType(); 4635 case Type::Complex: 4636 // Distinct complex types are incompatible. 4637 return QualType(); 4638 case Type::Vector: 4639 // FIXME: The merged type should be an ExtVector! 4640 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 4641 RHSCan->getAs<VectorType>())) 4642 return LHS; 4643 return QualType(); 4644 case Type::ObjCObject: { 4645 // Check if the types are assignment compatible. 4646 // FIXME: This should be type compatibility, e.g. whether 4647 // "LHS x; RHS x;" at global scope is legal. 4648 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 4649 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 4650 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 4651 return LHS; 4652 4653 return QualType(); 4654 } 4655 case Type::ObjCObjectPointer: { 4656 if (OfBlockPointer) { 4657 if (canAssignObjCInterfacesInBlockPointer( 4658 LHS->getAs<ObjCObjectPointerType>(), 4659 RHS->getAs<ObjCObjectPointerType>())) 4660 return LHS; 4661 return QualType(); 4662 } 4663 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 4664 RHS->getAs<ObjCObjectPointerType>())) 4665 return LHS; 4666 4667 return QualType(); 4668 } 4669 } 4670 4671 return QualType(); 4672} 4673 4674/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 4675/// 'RHS' attributes and returns the merged version; including for function 4676/// return types. 4677QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 4678 QualType LHSCan = getCanonicalType(LHS), 4679 RHSCan = getCanonicalType(RHS); 4680 // If two types are identical, they are compatible. 4681 if (LHSCan == RHSCan) 4682 return LHS; 4683 if (RHSCan->isFunctionType()) { 4684 if (!LHSCan->isFunctionType()) 4685 return QualType(); 4686 QualType OldReturnType = 4687 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 4688 QualType NewReturnType = 4689 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 4690 QualType ResReturnType = 4691 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 4692 if (ResReturnType.isNull()) 4693 return QualType(); 4694 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 4695 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 4696 // In either case, use OldReturnType to build the new function type. 4697 const FunctionType *F = LHS->getAs<FunctionType>(); 4698 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 4699 FunctionType::ExtInfo Info = getFunctionExtInfo(LHS); 4700 QualType ResultType 4701 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 4702 FPT->getNumArgs(), FPT->isVariadic(), 4703 FPT->getTypeQuals(), 4704 FPT->hasExceptionSpec(), 4705 FPT->hasAnyExceptionSpec(), 4706 FPT->getNumExceptions(), 4707 FPT->exception_begin(), 4708 Info); 4709 return ResultType; 4710 } 4711 } 4712 return QualType(); 4713 } 4714 4715 // If the qualifiers are different, the types can still be merged. 4716 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4717 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4718 if (LQuals != RQuals) { 4719 // If any of these qualifiers are different, we have a type mismatch. 4720 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4721 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4722 return QualType(); 4723 4724 // Exactly one GC qualifier difference is allowed: __strong is 4725 // okay if the other type has no GC qualifier but is an Objective 4726 // C object pointer (i.e. implicitly strong by default). We fix 4727 // this by pretending that the unqualified type was actually 4728 // qualified __strong. 4729 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4730 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4731 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4732 4733 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4734 return QualType(); 4735 4736 if (GC_L == Qualifiers::Strong) 4737 return LHS; 4738 if (GC_R == Qualifiers::Strong) 4739 return RHS; 4740 return QualType(); 4741 } 4742 4743 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 4744 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 4745 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 4746 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 4747 if (ResQT == LHSBaseQT) 4748 return LHS; 4749 if (ResQT == RHSBaseQT) 4750 return RHS; 4751 } 4752 return QualType(); 4753} 4754 4755//===----------------------------------------------------------------------===// 4756// Integer Predicates 4757//===----------------------------------------------------------------------===// 4758 4759unsigned ASTContext::getIntWidth(QualType T) { 4760 if (T->isBooleanType()) 4761 return 1; 4762 if (EnumType *ET = dyn_cast<EnumType>(T)) 4763 T = ET->getDecl()->getIntegerType(); 4764 // For builtin types, just use the standard type sizing method 4765 return (unsigned)getTypeSize(T); 4766} 4767 4768QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 4769 assert(T->isSignedIntegerType() && "Unexpected type"); 4770 4771 // Turn <4 x signed int> -> <4 x unsigned int> 4772 if (const VectorType *VTy = T->getAs<VectorType>()) 4773 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 4774 VTy->getNumElements(), VTy->isAltiVec(), VTy->isPixel()); 4775 4776 // For enums, we return the unsigned version of the base type. 4777 if (const EnumType *ETy = T->getAs<EnumType>()) 4778 T = ETy->getDecl()->getIntegerType(); 4779 4780 const BuiltinType *BTy = T->getAs<BuiltinType>(); 4781 assert(BTy && "Unexpected signed integer type"); 4782 switch (BTy->getKind()) { 4783 case BuiltinType::Char_S: 4784 case BuiltinType::SChar: 4785 return UnsignedCharTy; 4786 case BuiltinType::Short: 4787 return UnsignedShortTy; 4788 case BuiltinType::Int: 4789 return UnsignedIntTy; 4790 case BuiltinType::Long: 4791 return UnsignedLongTy; 4792 case BuiltinType::LongLong: 4793 return UnsignedLongLongTy; 4794 case BuiltinType::Int128: 4795 return UnsignedInt128Ty; 4796 default: 4797 assert(0 && "Unexpected signed integer type"); 4798 return QualType(); 4799 } 4800} 4801 4802ExternalASTSource::~ExternalASTSource() { } 4803 4804void ExternalASTSource::PrintStats() { } 4805 4806 4807//===----------------------------------------------------------------------===// 4808// Builtin Type Computation 4809//===----------------------------------------------------------------------===// 4810 4811/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 4812/// pointer over the consumed characters. This returns the resultant type. 4813static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 4814 ASTContext::GetBuiltinTypeError &Error, 4815 bool AllowTypeModifiers = true) { 4816 // Modifiers. 4817 int HowLong = 0; 4818 bool Signed = false, Unsigned = false; 4819 4820 // Read the modifiers first. 4821 bool Done = false; 4822 while (!Done) { 4823 switch (*Str++) { 4824 default: Done = true; --Str; break; 4825 case 'S': 4826 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 4827 assert(!Signed && "Can't use 'S' modifier multiple times!"); 4828 Signed = true; 4829 break; 4830 case 'U': 4831 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 4832 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 4833 Unsigned = true; 4834 break; 4835 case 'L': 4836 assert(HowLong <= 2 && "Can't have LLLL modifier"); 4837 ++HowLong; 4838 break; 4839 } 4840 } 4841 4842 QualType Type; 4843 4844 // Read the base type. 4845 switch (*Str++) { 4846 default: assert(0 && "Unknown builtin type letter!"); 4847 case 'v': 4848 assert(HowLong == 0 && !Signed && !Unsigned && 4849 "Bad modifiers used with 'v'!"); 4850 Type = Context.VoidTy; 4851 break; 4852 case 'f': 4853 assert(HowLong == 0 && !Signed && !Unsigned && 4854 "Bad modifiers used with 'f'!"); 4855 Type = Context.FloatTy; 4856 break; 4857 case 'd': 4858 assert(HowLong < 2 && !Signed && !Unsigned && 4859 "Bad modifiers used with 'd'!"); 4860 if (HowLong) 4861 Type = Context.LongDoubleTy; 4862 else 4863 Type = Context.DoubleTy; 4864 break; 4865 case 's': 4866 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 4867 if (Unsigned) 4868 Type = Context.UnsignedShortTy; 4869 else 4870 Type = Context.ShortTy; 4871 break; 4872 case 'i': 4873 if (HowLong == 3) 4874 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 4875 else if (HowLong == 2) 4876 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 4877 else if (HowLong == 1) 4878 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 4879 else 4880 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 4881 break; 4882 case 'c': 4883 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 4884 if (Signed) 4885 Type = Context.SignedCharTy; 4886 else if (Unsigned) 4887 Type = Context.UnsignedCharTy; 4888 else 4889 Type = Context.CharTy; 4890 break; 4891 case 'b': // boolean 4892 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 4893 Type = Context.BoolTy; 4894 break; 4895 case 'z': // size_t. 4896 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 4897 Type = Context.getSizeType(); 4898 break; 4899 case 'F': 4900 Type = Context.getCFConstantStringType(); 4901 break; 4902 case 'a': 4903 Type = Context.getBuiltinVaListType(); 4904 assert(!Type.isNull() && "builtin va list type not initialized!"); 4905 break; 4906 case 'A': 4907 // This is a "reference" to a va_list; however, what exactly 4908 // this means depends on how va_list is defined. There are two 4909 // different kinds of va_list: ones passed by value, and ones 4910 // passed by reference. An example of a by-value va_list is 4911 // x86, where va_list is a char*. An example of by-ref va_list 4912 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 4913 // we want this argument to be a char*&; for x86-64, we want 4914 // it to be a __va_list_tag*. 4915 Type = Context.getBuiltinVaListType(); 4916 assert(!Type.isNull() && "builtin va list type not initialized!"); 4917 if (Type->isArrayType()) { 4918 Type = Context.getArrayDecayedType(Type); 4919 } else { 4920 Type = Context.getLValueReferenceType(Type); 4921 } 4922 break; 4923 case 'V': { 4924 char *End; 4925 unsigned NumElements = strtoul(Str, &End, 10); 4926 assert(End != Str && "Missing vector size"); 4927 4928 Str = End; 4929 4930 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4931 // FIXME: Don't know what to do about AltiVec. 4932 Type = Context.getVectorType(ElementType, NumElements, false, false); 4933 break; 4934 } 4935 case 'X': { 4936 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4937 Type = Context.getComplexType(ElementType); 4938 break; 4939 } 4940 case 'P': 4941 Type = Context.getFILEType(); 4942 if (Type.isNull()) { 4943 Error = ASTContext::GE_Missing_stdio; 4944 return QualType(); 4945 } 4946 break; 4947 case 'J': 4948 if (Signed) 4949 Type = Context.getsigjmp_bufType(); 4950 else 4951 Type = Context.getjmp_bufType(); 4952 4953 if (Type.isNull()) { 4954 Error = ASTContext::GE_Missing_setjmp; 4955 return QualType(); 4956 } 4957 break; 4958 } 4959 4960 if (!AllowTypeModifiers) 4961 return Type; 4962 4963 Done = false; 4964 while (!Done) { 4965 switch (char c = *Str++) { 4966 default: Done = true; --Str; break; 4967 case '*': 4968 case '&': 4969 { 4970 // Both pointers and references can have their pointee types 4971 // qualified with an address space. 4972 char *End; 4973 unsigned AddrSpace = strtoul(Str, &End, 10); 4974 if (End != Str && AddrSpace != 0) { 4975 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 4976 Str = End; 4977 } 4978 } 4979 if (c == '*') 4980 Type = Context.getPointerType(Type); 4981 else 4982 Type = Context.getLValueReferenceType(Type); 4983 break; 4984 // FIXME: There's no way to have a built-in with an rvalue ref arg. 4985 case 'C': 4986 Type = Type.withConst(); 4987 break; 4988 case 'D': 4989 Type = Context.getVolatileType(Type); 4990 break; 4991 } 4992 } 4993 4994 return Type; 4995} 4996 4997/// GetBuiltinType - Return the type for the specified builtin. 4998QualType ASTContext::GetBuiltinType(unsigned id, 4999 GetBuiltinTypeError &Error) { 5000 const char *TypeStr = BuiltinInfo.GetTypeString(id); 5001 5002 llvm::SmallVector<QualType, 8> ArgTypes; 5003 5004 Error = GE_None; 5005 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 5006 if (Error != GE_None) 5007 return QualType(); 5008 while (TypeStr[0] && TypeStr[0] != '.') { 5009 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 5010 if (Error != GE_None) 5011 return QualType(); 5012 5013 // Do array -> pointer decay. The builtin should use the decayed type. 5014 if (Ty->isArrayType()) 5015 Ty = getArrayDecayedType(Ty); 5016 5017 ArgTypes.push_back(Ty); 5018 } 5019 5020 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 5021 "'.' should only occur at end of builtin type list!"); 5022 5023 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 5024 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 5025 return getFunctionNoProtoType(ResType); 5026 5027 // FIXME: Should we create noreturn types? 5028 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 5029 TypeStr[0] == '.', 0, false, false, 0, 0, 5030 FunctionType::ExtInfo()); 5031} 5032 5033QualType 5034ASTContext::UsualArithmeticConversionsType(QualType lhs, QualType rhs) { 5035 // Perform the usual unary conversions. We do this early so that 5036 // integral promotions to "int" can allow us to exit early, in the 5037 // lhs == rhs check. Also, for conversion purposes, we ignore any 5038 // qualifiers. For example, "const float" and "float" are 5039 // equivalent. 5040 if (lhs->isPromotableIntegerType()) 5041 lhs = getPromotedIntegerType(lhs); 5042 else 5043 lhs = lhs.getUnqualifiedType(); 5044 if (rhs->isPromotableIntegerType()) 5045 rhs = getPromotedIntegerType(rhs); 5046 else 5047 rhs = rhs.getUnqualifiedType(); 5048 5049 // If both types are identical, no conversion is needed. 5050 if (lhs == rhs) 5051 return lhs; 5052 5053 // If either side is a non-arithmetic type (e.g. a pointer), we are done. 5054 // The caller can deal with this (e.g. pointer + int). 5055 if (!lhs->isArithmeticType() || !rhs->isArithmeticType()) 5056 return lhs; 5057 5058 // At this point, we have two different arithmetic types. 5059 5060 // Handle complex types first (C99 6.3.1.8p1). 5061 if (lhs->isComplexType() || rhs->isComplexType()) { 5062 // if we have an integer operand, the result is the complex type. 5063 if (rhs->isIntegerType() || rhs->isComplexIntegerType()) { 5064 // convert the rhs to the lhs complex type. 5065 return lhs; 5066 } 5067 if (lhs->isIntegerType() || lhs->isComplexIntegerType()) { 5068 // convert the lhs to the rhs complex type. 5069 return rhs; 5070 } 5071 // This handles complex/complex, complex/float, or float/complex. 5072 // When both operands are complex, the shorter operand is converted to the 5073 // type of the longer, and that is the type of the result. This corresponds 5074 // to what is done when combining two real floating-point operands. 5075 // The fun begins when size promotion occur across type domains. 5076 // From H&S 6.3.4: When one operand is complex and the other is a real 5077 // floating-point type, the less precise type is converted, within it's 5078 // real or complex domain, to the precision of the other type. For example, 5079 // when combining a "long double" with a "double _Complex", the 5080 // "double _Complex" is promoted to "long double _Complex". 5081 int result = getFloatingTypeOrder(lhs, rhs); 5082 5083 if (result > 0) { // The left side is bigger, convert rhs. 5084 rhs = getFloatingTypeOfSizeWithinDomain(lhs, rhs); 5085 } else if (result < 0) { // The right side is bigger, convert lhs. 5086 lhs = getFloatingTypeOfSizeWithinDomain(rhs, lhs); 5087 } 5088 // At this point, lhs and rhs have the same rank/size. Now, make sure the 5089 // domains match. This is a requirement for our implementation, C99 5090 // does not require this promotion. 5091 if (lhs != rhs) { // Domains don't match, we have complex/float mix. 5092 if (lhs->isRealFloatingType()) { // handle "double, _Complex double". 5093 return rhs; 5094 } else { // handle "_Complex double, double". 5095 return lhs; 5096 } 5097 } 5098 return lhs; // The domain/size match exactly. 5099 } 5100 // Now handle "real" floating types (i.e. float, double, long double). 5101 if (lhs->isRealFloatingType() || rhs->isRealFloatingType()) { 5102 // if we have an integer operand, the result is the real floating type. 5103 if (rhs->isIntegerType()) { 5104 // convert rhs to the lhs floating point type. 5105 return lhs; 5106 } 5107 if (rhs->isComplexIntegerType()) { 5108 // convert rhs to the complex floating point type. 5109 return getComplexType(lhs); 5110 } 5111 if (lhs->isIntegerType()) { 5112 // convert lhs to the rhs floating point type. 5113 return rhs; 5114 } 5115 if (lhs->isComplexIntegerType()) { 5116 // convert lhs to the complex floating point type. 5117 return getComplexType(rhs); 5118 } 5119 // We have two real floating types, float/complex combos were handled above. 5120 // Convert the smaller operand to the bigger result. 5121 int result = getFloatingTypeOrder(lhs, rhs); 5122 if (result > 0) // convert the rhs 5123 return lhs; 5124 assert(result < 0 && "illegal float comparison"); 5125 return rhs; // convert the lhs 5126 } 5127 if (lhs->isComplexIntegerType() || rhs->isComplexIntegerType()) { 5128 // Handle GCC complex int extension. 5129 const ComplexType *lhsComplexInt = lhs->getAsComplexIntegerType(); 5130 const ComplexType *rhsComplexInt = rhs->getAsComplexIntegerType(); 5131 5132 if (lhsComplexInt && rhsComplexInt) { 5133 if (getIntegerTypeOrder(lhsComplexInt->getElementType(), 5134 rhsComplexInt->getElementType()) >= 0) 5135 return lhs; // convert the rhs 5136 return rhs; 5137 } else if (lhsComplexInt && rhs->isIntegerType()) { 5138 // convert the rhs to the lhs complex type. 5139 return lhs; 5140 } else if (rhsComplexInt && lhs->isIntegerType()) { 5141 // convert the lhs to the rhs complex type. 5142 return rhs; 5143 } 5144 } 5145 // Finally, we have two differing integer types. 5146 // The rules for this case are in C99 6.3.1.8 5147 int compare = getIntegerTypeOrder(lhs, rhs); 5148 bool lhsSigned = lhs->isSignedIntegerType(), 5149 rhsSigned = rhs->isSignedIntegerType(); 5150 QualType destType; 5151 if (lhsSigned == rhsSigned) { 5152 // Same signedness; use the higher-ranked type 5153 destType = compare >= 0 ? lhs : rhs; 5154 } else if (compare != (lhsSigned ? 1 : -1)) { 5155 // The unsigned type has greater than or equal rank to the 5156 // signed type, so use the unsigned type 5157 destType = lhsSigned ? rhs : lhs; 5158 } else if (getIntWidth(lhs) != getIntWidth(rhs)) { 5159 // The two types are different widths; if we are here, that 5160 // means the signed type is larger than the unsigned type, so 5161 // use the signed type. 5162 destType = lhsSigned ? lhs : rhs; 5163 } else { 5164 // The signed type is higher-ranked than the unsigned type, 5165 // but isn't actually any bigger (like unsigned int and long 5166 // on most 32-bit systems). Use the unsigned type corresponding 5167 // to the signed type. 5168 destType = getCorrespondingUnsignedType(lhsSigned ? lhs : rhs); 5169 } 5170 return destType; 5171} 5172