ASTContext.cpp revision ef99001908e799c388f1363b1e607dad5f5b57d3
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 TemplateSpecializationTypes(this_()), 44 DependentTemplateSpecializationTypes(this_()), 45 GlobalNestedNameSpecifier(0), CFConstantStringTypeDecl(0), 46 NSConstantStringTypeDecl(0), 47 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 48 sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 49 NullTypeSourceInfo(QualType()), 50 SourceMgr(SM), LangOpts(LOpts), FreeMemory(FreeMem), Target(t), 51 Idents(idents), Selectors(sels), 52 BuiltinInfo(builtins), 53 DeclarationNames(*this), 54 ExternalSource(0), PrintingPolicy(LOpts), 55 LastSDM(0, 0) { 56 ObjCIdRedefinitionType = QualType(); 57 ObjCClassRedefinitionType = QualType(); 58 ObjCSelRedefinitionType = QualType(); 59 if (size_reserve > 0) Types.reserve(size_reserve); 60 TUDecl = TranslationUnitDecl::Create(*this); 61 InitBuiltinTypes(); 62} 63 64ASTContext::~ASTContext() { 65 // Release the DenseMaps associated with DeclContext objects. 66 // FIXME: Is this the ideal solution? 67 ReleaseDeclContextMaps(); 68 69 if (!FreeMemory) { 70 // Call all of the deallocation functions. 71 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 72 Deallocations[I].first(Deallocations[I].second); 73 } 74 75 // Release all of the memory associated with overridden C++ methods. 76 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 77 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 78 OM != OMEnd; ++OM) 79 OM->second.Destroy(); 80 81 if (FreeMemory) { 82 // Deallocate all the types. 83 while (!Types.empty()) { 84 Types.back()->Destroy(*this); 85 Types.pop_back(); 86 } 87 88 for (llvm::FoldingSet<ExtQuals>::iterator 89 I = ExtQualNodes.begin(), E = ExtQualNodes.end(); I != E; ) { 90 // Increment in loop to prevent using deallocated memory. 91 Deallocate(&*I++); 92 } 93 94 for (llvm::DenseMap<const ObjCContainerDecl*, 95 const ASTRecordLayout*>::iterator 96 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) { 97 // Increment in loop to prevent using deallocated memory. 98 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 99 R->Destroy(*this); 100 } 101 } 102 103 // ASTRecordLayout objects in ASTRecordLayouts must always be destroyed 104 // even when using the BumpPtrAllocator because they can contain 105 // DenseMaps. 106 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 107 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 108 // Increment in loop to prevent using deallocated memory. 109 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 110 R->Destroy(*this); 111 } 112 113 // Destroy nested-name-specifiers. 114 for (llvm::FoldingSet<NestedNameSpecifier>::iterator 115 NNS = NestedNameSpecifiers.begin(), 116 NNSEnd = NestedNameSpecifiers.end(); 117 NNS != NNSEnd; ) { 118 // Increment in loop to prevent using deallocated memory. 119 (*NNS++).Destroy(*this); 120 } 121 122 if (GlobalNestedNameSpecifier) 123 GlobalNestedNameSpecifier->Destroy(*this); 124 125 TUDecl->Destroy(*this); 126} 127 128void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 129 Deallocations.push_back(std::make_pair(Callback, Data)); 130} 131 132void 133ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 134 ExternalSource.reset(Source.take()); 135} 136 137void ASTContext::PrintStats() const { 138 fprintf(stderr, "*** AST Context Stats:\n"); 139 fprintf(stderr, " %d types total.\n", (int)Types.size()); 140 141 unsigned counts[] = { 142#define TYPE(Name, Parent) 0, 143#define ABSTRACT_TYPE(Name, Parent) 144#include "clang/AST/TypeNodes.def" 145 0 // Extra 146 }; 147 148 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 149 Type *T = Types[i]; 150 counts[(unsigned)T->getTypeClass()]++; 151 } 152 153 unsigned Idx = 0; 154 unsigned TotalBytes = 0; 155#define TYPE(Name, Parent) \ 156 if (counts[Idx]) \ 157 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 158 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 159 ++Idx; 160#define ABSTRACT_TYPE(Name, Parent) 161#include "clang/AST/TypeNodes.def" 162 163 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 164 165 if (ExternalSource.get()) { 166 fprintf(stderr, "\n"); 167 ExternalSource->PrintStats(); 168 } 169} 170 171 172void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 173 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 174 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 175 Types.push_back(Ty); 176} 177 178void ASTContext::InitBuiltinTypes() { 179 assert(VoidTy.isNull() && "Context reinitialized?"); 180 181 // C99 6.2.5p19. 182 InitBuiltinType(VoidTy, BuiltinType::Void); 183 184 // C99 6.2.5p2. 185 InitBuiltinType(BoolTy, BuiltinType::Bool); 186 // C99 6.2.5p3. 187 if (LangOpts.CharIsSigned) 188 InitBuiltinType(CharTy, BuiltinType::Char_S); 189 else 190 InitBuiltinType(CharTy, BuiltinType::Char_U); 191 // C99 6.2.5p4. 192 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 193 InitBuiltinType(ShortTy, BuiltinType::Short); 194 InitBuiltinType(IntTy, BuiltinType::Int); 195 InitBuiltinType(LongTy, BuiltinType::Long); 196 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 197 198 // C99 6.2.5p6. 199 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 200 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 201 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 202 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 203 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 204 205 // C99 6.2.5p10. 206 InitBuiltinType(FloatTy, BuiltinType::Float); 207 InitBuiltinType(DoubleTy, BuiltinType::Double); 208 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 209 210 // GNU extension, 128-bit integers. 211 InitBuiltinType(Int128Ty, BuiltinType::Int128); 212 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 213 214 if (LangOpts.CPlusPlus) // C++ 3.9.1p5 215 InitBuiltinType(WCharTy, BuiltinType::WChar); 216 else // C99 217 WCharTy = getFromTargetType(Target.getWCharType()); 218 219 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 220 InitBuiltinType(Char16Ty, BuiltinType::Char16); 221 else // C99 222 Char16Ty = getFromTargetType(Target.getChar16Type()); 223 224 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 225 InitBuiltinType(Char32Ty, BuiltinType::Char32); 226 else // C99 227 Char32Ty = getFromTargetType(Target.getChar32Type()); 228 229 // Placeholder type for functions. 230 InitBuiltinType(OverloadTy, BuiltinType::Overload); 231 232 // Placeholder type for type-dependent expressions whose type is 233 // completely unknown. No code should ever check a type against 234 // DependentTy and users should never see it; however, it is here to 235 // help diagnose failures to properly check for type-dependent 236 // expressions. 237 InitBuiltinType(DependentTy, BuiltinType::Dependent); 238 239 // Placeholder type for C++0x auto declarations whose real type has 240 // not yet been deduced. 241 InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 242 243 // C99 6.2.5p11. 244 FloatComplexTy = getComplexType(FloatTy); 245 DoubleComplexTy = getComplexType(DoubleTy); 246 LongDoubleComplexTy = getComplexType(LongDoubleTy); 247 248 BuiltinVaListType = QualType(); 249 250 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 251 ObjCIdTypedefType = QualType(); 252 ObjCClassTypedefType = QualType(); 253 ObjCSelTypedefType = QualType(); 254 255 // Builtin types for 'id', 'Class', and 'SEL'. 256 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 257 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 258 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 259 260 ObjCConstantStringType = QualType(); 261 262 // void * type 263 VoidPtrTy = getPointerType(VoidTy); 264 265 // nullptr type (C++0x 2.14.7) 266 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 267} 268 269MemberSpecializationInfo * 270ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 271 assert(Var->isStaticDataMember() && "Not a static data member"); 272 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 273 = InstantiatedFromStaticDataMember.find(Var); 274 if (Pos == InstantiatedFromStaticDataMember.end()) 275 return 0; 276 277 return Pos->second; 278} 279 280void 281ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 282 TemplateSpecializationKind TSK) { 283 assert(Inst->isStaticDataMember() && "Not a static data member"); 284 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 285 assert(!InstantiatedFromStaticDataMember[Inst] && 286 "Already noted what static data member was instantiated from"); 287 InstantiatedFromStaticDataMember[Inst] 288 = new (*this) MemberSpecializationInfo(Tmpl, TSK); 289} 290 291NamedDecl * 292ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 293 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 294 = InstantiatedFromUsingDecl.find(UUD); 295 if (Pos == InstantiatedFromUsingDecl.end()) 296 return 0; 297 298 return Pos->second; 299} 300 301void 302ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 303 assert((isa<UsingDecl>(Pattern) || 304 isa<UnresolvedUsingValueDecl>(Pattern) || 305 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 306 "pattern decl is not a using decl"); 307 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 308 InstantiatedFromUsingDecl[Inst] = Pattern; 309} 310 311UsingShadowDecl * 312ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 313 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 314 = InstantiatedFromUsingShadowDecl.find(Inst); 315 if (Pos == InstantiatedFromUsingShadowDecl.end()) 316 return 0; 317 318 return Pos->second; 319} 320 321void 322ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 323 UsingShadowDecl *Pattern) { 324 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 325 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 326} 327 328FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 329 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 330 = InstantiatedFromUnnamedFieldDecl.find(Field); 331 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 332 return 0; 333 334 return Pos->second; 335} 336 337void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 338 FieldDecl *Tmpl) { 339 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 340 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 341 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 342 "Already noted what unnamed field was instantiated from"); 343 344 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 345} 346 347ASTContext::overridden_cxx_method_iterator 348ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 349 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 350 = OverriddenMethods.find(Method); 351 if (Pos == OverriddenMethods.end()) 352 return 0; 353 354 return Pos->second.begin(); 355} 356 357ASTContext::overridden_cxx_method_iterator 358ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 359 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 360 = OverriddenMethods.find(Method); 361 if (Pos == OverriddenMethods.end()) 362 return 0; 363 364 return Pos->second.end(); 365} 366 367void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 368 const CXXMethodDecl *Overridden) { 369 OverriddenMethods[Method].push_back(Overridden); 370} 371 372namespace { 373 class BeforeInTranslationUnit 374 : std::binary_function<SourceRange, SourceRange, bool> { 375 SourceManager *SourceMgr; 376 377 public: 378 explicit BeforeInTranslationUnit(SourceManager *SM) : SourceMgr(SM) { } 379 380 bool operator()(SourceRange X, SourceRange Y) { 381 return SourceMgr->isBeforeInTranslationUnit(X.getBegin(), Y.getBegin()); 382 } 383 }; 384} 385 386//===----------------------------------------------------------------------===// 387// Type Sizing and Analysis 388//===----------------------------------------------------------------------===// 389 390/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 391/// scalar floating point type. 392const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 393 const BuiltinType *BT = T->getAs<BuiltinType>(); 394 assert(BT && "Not a floating point type!"); 395 switch (BT->getKind()) { 396 default: assert(0 && "Not a floating point type!"); 397 case BuiltinType::Float: return Target.getFloatFormat(); 398 case BuiltinType::Double: return Target.getDoubleFormat(); 399 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 400 } 401} 402 403/// getDeclAlign - Return a conservative estimate of the alignment of the 404/// specified decl. Note that bitfields do not have a valid alignment, so 405/// this method will assert on them. 406/// If @p RefAsPointee, references are treated like their underlying type 407/// (for alignof), else they're treated like pointers (for CodeGen). 408CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) { 409 unsigned Align = Target.getCharWidth(); 410 411 if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 412 Align = std::max(Align, AA->getMaxAlignment()); 413 414 if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 415 QualType T = VD->getType(); 416 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 417 if (RefAsPointee) 418 T = RT->getPointeeType(); 419 else 420 T = getPointerType(RT->getPointeeType()); 421 } 422 if (!T->isIncompleteType() && !T->isFunctionType()) { 423 unsigned MinWidth = Target.getLargeArrayMinWidth(); 424 unsigned ArrayAlign = Target.getLargeArrayAlign(); 425 if (isa<VariableArrayType>(T) && MinWidth != 0) 426 Align = std::max(Align, ArrayAlign); 427 if (ConstantArrayType *CT = dyn_cast<ConstantArrayType>(T)) { 428 unsigned Size = getTypeSize(CT); 429 if (MinWidth != 0 && MinWidth <= Size) 430 Align = std::max(Align, ArrayAlign); 431 } 432 // Incomplete or function types default to 1. 433 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 434 T = cast<ArrayType>(T)->getElementType(); 435 436 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 437 } 438 if (const FieldDecl *FD = dyn_cast<FieldDecl>(VD)) { 439 // In the case of a field in a packed struct, we want the minimum 440 // of the alignment of the field and the alignment of the struct. 441 Align = std::min(Align, 442 getPreferredTypeAlign(FD->getParent()->getTypeForDecl())); 443 } 444 } 445 446 return CharUnits::fromQuantity(Align / Target.getCharWidth()); 447} 448 449std::pair<CharUnits, CharUnits> 450ASTContext::getTypeInfoInChars(const Type *T) { 451 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 452 return std::make_pair(CharUnits::fromQuantity(Info.first / getCharWidth()), 453 CharUnits::fromQuantity(Info.second / getCharWidth())); 454} 455 456std::pair<CharUnits, CharUnits> 457ASTContext::getTypeInfoInChars(QualType T) { 458 return getTypeInfoInChars(T.getTypePtr()); 459} 460 461/// getTypeSize - Return the size of the specified type, in bits. This method 462/// does not work on incomplete types. 463/// 464/// FIXME: Pointers into different addr spaces could have different sizes and 465/// alignment requirements: getPointerInfo should take an AddrSpace, this 466/// should take a QualType, &c. 467std::pair<uint64_t, unsigned> 468ASTContext::getTypeInfo(const Type *T) { 469 uint64_t Width=0; 470 unsigned Align=8; 471 switch (T->getTypeClass()) { 472#define TYPE(Class, Base) 473#define ABSTRACT_TYPE(Class, Base) 474#define NON_CANONICAL_TYPE(Class, Base) 475#define DEPENDENT_TYPE(Class, Base) case Type::Class: 476#include "clang/AST/TypeNodes.def" 477 assert(false && "Should not see dependent types"); 478 break; 479 480 case Type::FunctionNoProto: 481 case Type::FunctionProto: 482 // GCC extension: alignof(function) = 32 bits 483 Width = 0; 484 Align = 32; 485 break; 486 487 case Type::IncompleteArray: 488 case Type::VariableArray: 489 Width = 0; 490 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 491 break; 492 493 case Type::ConstantArray: { 494 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 495 496 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 497 Width = EltInfo.first*CAT->getSize().getZExtValue(); 498 Align = EltInfo.second; 499 break; 500 } 501 case Type::ExtVector: 502 case Type::Vector: { 503 const VectorType *VT = cast<VectorType>(T); 504 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 505 Width = EltInfo.first*VT->getNumElements(); 506 Align = Width; 507 // If the alignment is not a power of 2, round up to the next power of 2. 508 // This happens for non-power-of-2 length vectors. 509 if (Align & (Align-1)) { 510 Align = llvm::NextPowerOf2(Align); 511 Width = llvm::RoundUpToAlignment(Width, Align); 512 } 513 break; 514 } 515 516 case Type::Builtin: 517 switch (cast<BuiltinType>(T)->getKind()) { 518 default: assert(0 && "Unknown builtin type!"); 519 case BuiltinType::Void: 520 // GCC extension: alignof(void) = 8 bits. 521 Width = 0; 522 Align = 8; 523 break; 524 525 case BuiltinType::Bool: 526 Width = Target.getBoolWidth(); 527 Align = Target.getBoolAlign(); 528 break; 529 case BuiltinType::Char_S: 530 case BuiltinType::Char_U: 531 case BuiltinType::UChar: 532 case BuiltinType::SChar: 533 Width = Target.getCharWidth(); 534 Align = Target.getCharAlign(); 535 break; 536 case BuiltinType::WChar: 537 Width = Target.getWCharWidth(); 538 Align = Target.getWCharAlign(); 539 break; 540 case BuiltinType::Char16: 541 Width = Target.getChar16Width(); 542 Align = Target.getChar16Align(); 543 break; 544 case BuiltinType::Char32: 545 Width = Target.getChar32Width(); 546 Align = Target.getChar32Align(); 547 break; 548 case BuiltinType::UShort: 549 case BuiltinType::Short: 550 Width = Target.getShortWidth(); 551 Align = Target.getShortAlign(); 552 break; 553 case BuiltinType::UInt: 554 case BuiltinType::Int: 555 Width = Target.getIntWidth(); 556 Align = Target.getIntAlign(); 557 break; 558 case BuiltinType::ULong: 559 case BuiltinType::Long: 560 Width = Target.getLongWidth(); 561 Align = Target.getLongAlign(); 562 break; 563 case BuiltinType::ULongLong: 564 case BuiltinType::LongLong: 565 Width = Target.getLongLongWidth(); 566 Align = Target.getLongLongAlign(); 567 break; 568 case BuiltinType::Int128: 569 case BuiltinType::UInt128: 570 Width = 128; 571 Align = 128; // int128_t is 128-bit aligned on all targets. 572 break; 573 case BuiltinType::Float: 574 Width = Target.getFloatWidth(); 575 Align = Target.getFloatAlign(); 576 break; 577 case BuiltinType::Double: 578 Width = Target.getDoubleWidth(); 579 Align = Target.getDoubleAlign(); 580 break; 581 case BuiltinType::LongDouble: 582 Width = Target.getLongDoubleWidth(); 583 Align = Target.getLongDoubleAlign(); 584 break; 585 case BuiltinType::NullPtr: 586 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 587 Align = Target.getPointerAlign(0); // == sizeof(void*) 588 break; 589 } 590 break; 591 case Type::ObjCObjectPointer: 592 Width = Target.getPointerWidth(0); 593 Align = Target.getPointerAlign(0); 594 break; 595 case Type::BlockPointer: { 596 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 597 Width = Target.getPointerWidth(AS); 598 Align = Target.getPointerAlign(AS); 599 break; 600 } 601 case Type::LValueReference: 602 case Type::RValueReference: { 603 // alignof and sizeof should never enter this code path here, so we go 604 // the pointer route. 605 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 606 Width = Target.getPointerWidth(AS); 607 Align = Target.getPointerAlign(AS); 608 break; 609 } 610 case Type::Pointer: { 611 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 612 Width = Target.getPointerWidth(AS); 613 Align = Target.getPointerAlign(AS); 614 break; 615 } 616 case Type::MemberPointer: { 617 QualType Pointee = cast<MemberPointerType>(T)->getPointeeType(); 618 std::pair<uint64_t, unsigned> PtrDiffInfo = 619 getTypeInfo(getPointerDiffType()); 620 Width = PtrDiffInfo.first; 621 if (Pointee->isFunctionType()) 622 Width *= 2; 623 Align = PtrDiffInfo.second; 624 break; 625 } 626 case Type::Complex: { 627 // Complex types have the same alignment as their elements, but twice the 628 // size. 629 std::pair<uint64_t, unsigned> EltInfo = 630 getTypeInfo(cast<ComplexType>(T)->getElementType()); 631 Width = EltInfo.first*2; 632 Align = EltInfo.second; 633 break; 634 } 635 case Type::ObjCObject: 636 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 637 case Type::ObjCInterface: { 638 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 639 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 640 Width = Layout.getSize(); 641 Align = Layout.getAlignment(); 642 break; 643 } 644 case Type::Record: 645 case Type::Enum: { 646 const TagType *TT = cast<TagType>(T); 647 648 if (TT->getDecl()->isInvalidDecl()) { 649 Width = 1; 650 Align = 1; 651 break; 652 } 653 654 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 655 return getTypeInfo(ET->getDecl()->getIntegerType()); 656 657 const RecordType *RT = cast<RecordType>(TT); 658 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 659 Width = Layout.getSize(); 660 Align = Layout.getAlignment(); 661 break; 662 } 663 664 case Type::SubstTemplateTypeParm: 665 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 666 getReplacementType().getTypePtr()); 667 668 case Type::Typedef: { 669 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 670 if (const AlignedAttr *Aligned = Typedef->getAttr<AlignedAttr>()) { 671 Align = std::max(Aligned->getMaxAlignment(), 672 getTypeAlign(Typedef->getUnderlyingType().getTypePtr())); 673 Width = getTypeSize(Typedef->getUnderlyingType().getTypePtr()); 674 } else 675 return getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 676 break; 677 } 678 679 case Type::TypeOfExpr: 680 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 681 .getTypePtr()); 682 683 case Type::TypeOf: 684 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 685 686 case Type::Decltype: 687 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 688 .getTypePtr()); 689 690 case Type::Elaborated: 691 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 692 693 case Type::TemplateSpecialization: 694 assert(getCanonicalType(T) != T && 695 "Cannot request the size of a dependent type"); 696 // FIXME: this is likely to be wrong once we support template 697 // aliases, since a template alias could refer to a typedef that 698 // has an __aligned__ attribute on it. 699 return getTypeInfo(getCanonicalType(T)); 700 } 701 702 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 703 return std::make_pair(Width, Align); 704} 705 706/// getTypeSizeInChars - Return the size of the specified type, in characters. 707/// This method does not work on incomplete types. 708CharUnits ASTContext::getTypeSizeInChars(QualType T) { 709 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 710} 711CharUnits ASTContext::getTypeSizeInChars(const Type *T) { 712 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 713} 714 715/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 716/// characters. This method does not work on incomplete types. 717CharUnits ASTContext::getTypeAlignInChars(QualType T) { 718 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 719} 720CharUnits ASTContext::getTypeAlignInChars(const Type *T) { 721 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 722} 723 724/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 725/// type for the current target in bits. This can be different than the ABI 726/// alignment in cases where it is beneficial for performance to overalign 727/// a data type. 728unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 729 unsigned ABIAlign = getTypeAlign(T); 730 731 // Double and long long should be naturally aligned if possible. 732 if (const ComplexType* CT = T->getAs<ComplexType>()) 733 T = CT->getElementType().getTypePtr(); 734 if (T->isSpecificBuiltinType(BuiltinType::Double) || 735 T->isSpecificBuiltinType(BuiltinType::LongLong)) 736 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 737 738 return ABIAlign; 739} 740 741static void CollectLocalObjCIvars(ASTContext *Ctx, 742 const ObjCInterfaceDecl *OI, 743 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 744 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 745 E = OI->ivar_end(); I != E; ++I) { 746 ObjCIvarDecl *IVDecl = *I; 747 if (!IVDecl->isInvalidDecl()) 748 Fields.push_back(cast<FieldDecl>(IVDecl)); 749 } 750} 751 752void ASTContext::CollectObjCIvars(const ObjCInterfaceDecl *OI, 753 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 754 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 755 CollectObjCIvars(SuperClass, Fields); 756 CollectLocalObjCIvars(this, OI, Fields); 757} 758 759/// ShallowCollectObjCIvars - 760/// Collect all ivars, including those synthesized, in the current class. 761/// 762void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 763 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 764 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 765 E = OI->ivar_end(); I != E; ++I) { 766 Ivars.push_back(*I); 767 } 768 769 CollectNonClassIvars(OI, Ivars); 770} 771 772/// CollectNonClassIvars - 773/// This routine collects all other ivars which are not declared in the class. 774/// This includes synthesized ivars (via @synthesize) and those in 775// class's @implementation. 776/// 777void ASTContext::CollectNonClassIvars(const ObjCInterfaceDecl *OI, 778 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 779 // Find ivars declared in class extension. 780 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) { 781 for (ObjCCategoryDecl::ivar_iterator I = CDecl->ivar_begin(), 782 E = CDecl->ivar_end(); I != E; ++I) { 783 Ivars.push_back(*I); 784 } 785 } 786 787 // Also add any ivar defined in this class's implementation. This 788 // includes synthesized ivars. 789 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) { 790 for (ObjCImplementationDecl::ivar_iterator I = ImplDecl->ivar_begin(), 791 E = ImplDecl->ivar_end(); I != E; ++I) 792 Ivars.push_back(*I); 793 } 794} 795 796/// CollectInheritedProtocols - Collect all protocols in current class and 797/// those inherited by it. 798void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 799 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 800 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 801 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 802 PE = OI->protocol_end(); P != PE; ++P) { 803 ObjCProtocolDecl *Proto = (*P); 804 Protocols.insert(Proto); 805 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 806 PE = Proto->protocol_end(); P != PE; ++P) { 807 Protocols.insert(*P); 808 CollectInheritedProtocols(*P, Protocols); 809 } 810 } 811 812 // Categories of this Interface. 813 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 814 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 815 CollectInheritedProtocols(CDeclChain, Protocols); 816 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 817 while (SD) { 818 CollectInheritedProtocols(SD, Protocols); 819 SD = SD->getSuperClass(); 820 } 821 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 822 for (ObjCInterfaceDecl::protocol_iterator P = OC->protocol_begin(), 823 PE = OC->protocol_end(); P != PE; ++P) { 824 ObjCProtocolDecl *Proto = (*P); 825 Protocols.insert(Proto); 826 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 827 PE = Proto->protocol_end(); P != PE; ++P) 828 CollectInheritedProtocols(*P, Protocols); 829 } 830 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 831 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 832 PE = OP->protocol_end(); P != PE; ++P) { 833 ObjCProtocolDecl *Proto = (*P); 834 Protocols.insert(Proto); 835 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 836 PE = Proto->protocol_end(); P != PE; ++P) 837 CollectInheritedProtocols(*P, Protocols); 838 } 839 } 840} 841 842unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) { 843 unsigned count = 0; 844 // Count ivars declared in class extension. 845 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) 846 count += CDecl->ivar_size(); 847 848 // Count ivar defined in this class's implementation. This 849 // includes synthesized ivars. 850 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 851 count += ImplDecl->ivar_size(); 852 853 return count; 854} 855 856/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 857ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 858 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 859 I = ObjCImpls.find(D); 860 if (I != ObjCImpls.end()) 861 return cast<ObjCImplementationDecl>(I->second); 862 return 0; 863} 864/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 865ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 866 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 867 I = ObjCImpls.find(D); 868 if (I != ObjCImpls.end()) 869 return cast<ObjCCategoryImplDecl>(I->second); 870 return 0; 871} 872 873/// \brief Set the implementation of ObjCInterfaceDecl. 874void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 875 ObjCImplementationDecl *ImplD) { 876 assert(IFaceD && ImplD && "Passed null params"); 877 ObjCImpls[IFaceD] = ImplD; 878} 879/// \brief Set the implementation of ObjCCategoryDecl. 880void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 881 ObjCCategoryImplDecl *ImplD) { 882 assert(CatD && ImplD && "Passed null params"); 883 ObjCImpls[CatD] = ImplD; 884} 885 886/// \brief Allocate an uninitialized TypeSourceInfo. 887/// 888/// The caller should initialize the memory held by TypeSourceInfo using 889/// the TypeLoc wrappers. 890/// 891/// \param T the type that will be the basis for type source info. This type 892/// should refer to how the declarator was written in source code, not to 893/// what type semantic analysis resolved the declarator to. 894TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 895 unsigned DataSize) { 896 if (!DataSize) 897 DataSize = TypeLoc::getFullDataSizeForType(T); 898 else 899 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 900 "incorrect data size provided to CreateTypeSourceInfo!"); 901 902 TypeSourceInfo *TInfo = 903 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 904 new (TInfo) TypeSourceInfo(T); 905 return TInfo; 906} 907 908TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 909 SourceLocation L) { 910 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 911 DI->getTypeLoc().initialize(L); 912 return DI; 913} 914 915const ASTRecordLayout & 916ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 917 return getObjCLayout(D, 0); 918} 919 920const ASTRecordLayout & 921ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 922 return getObjCLayout(D->getClassInterface(), D); 923} 924 925//===----------------------------------------------------------------------===// 926// Type creation/memoization methods 927//===----------------------------------------------------------------------===// 928 929QualType ASTContext::getExtQualType(const Type *TypeNode, Qualifiers Quals) { 930 unsigned Fast = Quals.getFastQualifiers(); 931 Quals.removeFastQualifiers(); 932 933 // Check if we've already instantiated this type. 934 llvm::FoldingSetNodeID ID; 935 ExtQuals::Profile(ID, TypeNode, Quals); 936 void *InsertPos = 0; 937 if (ExtQuals *EQ = ExtQualNodes.FindNodeOrInsertPos(ID, InsertPos)) { 938 assert(EQ->getQualifiers() == Quals); 939 QualType T = QualType(EQ, Fast); 940 return T; 941 } 942 943 ExtQuals *New = new (*this, TypeAlignment) ExtQuals(*this, TypeNode, Quals); 944 ExtQualNodes.InsertNode(New, InsertPos); 945 QualType T = QualType(New, Fast); 946 return T; 947} 948 949QualType ASTContext::getVolatileType(QualType T) { 950 QualType CanT = getCanonicalType(T); 951 if (CanT.isVolatileQualified()) return T; 952 953 QualifierCollector Quals; 954 const Type *TypeNode = Quals.strip(T); 955 Quals.addVolatile(); 956 957 return getExtQualType(TypeNode, Quals); 958} 959 960QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 961 QualType CanT = getCanonicalType(T); 962 if (CanT.getAddressSpace() == AddressSpace) 963 return T; 964 965 // If we are composing extended qualifiers together, merge together 966 // into one ExtQuals node. 967 QualifierCollector Quals; 968 const Type *TypeNode = Quals.strip(T); 969 970 // If this type already has an address space specified, it cannot get 971 // another one. 972 assert(!Quals.hasAddressSpace() && 973 "Type cannot be in multiple addr spaces!"); 974 Quals.addAddressSpace(AddressSpace); 975 976 return getExtQualType(TypeNode, Quals); 977} 978 979QualType ASTContext::getObjCGCQualType(QualType T, 980 Qualifiers::GC GCAttr) { 981 QualType CanT = getCanonicalType(T); 982 if (CanT.getObjCGCAttr() == GCAttr) 983 return T; 984 985 if (T->isPointerType()) { 986 QualType Pointee = T->getAs<PointerType>()->getPointeeType(); 987 if (Pointee->isAnyPointerType()) { 988 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 989 return getPointerType(ResultType); 990 } 991 } 992 993 // If we are composing extended qualifiers together, merge together 994 // into one ExtQuals node. 995 QualifierCollector Quals; 996 const Type *TypeNode = Quals.strip(T); 997 998 // If this type already has an ObjCGC specified, it cannot get 999 // another one. 1000 assert(!Quals.hasObjCGCAttr() && 1001 "Type cannot have multiple ObjCGCs!"); 1002 Quals.addObjCGCAttr(GCAttr); 1003 1004 return getExtQualType(TypeNode, Quals); 1005} 1006 1007static QualType getExtFunctionType(ASTContext& Context, QualType T, 1008 const FunctionType::ExtInfo &Info) { 1009 QualType ResultType; 1010 if (const PointerType *Pointer = T->getAs<PointerType>()) { 1011 QualType Pointee = Pointer->getPointeeType(); 1012 ResultType = getExtFunctionType(Context, Pointee, Info); 1013 if (ResultType == Pointee) 1014 return T; 1015 1016 ResultType = Context.getPointerType(ResultType); 1017 } else if (const BlockPointerType *BlockPointer 1018 = T->getAs<BlockPointerType>()) { 1019 QualType Pointee = BlockPointer->getPointeeType(); 1020 ResultType = getExtFunctionType(Context, Pointee, Info); 1021 if (ResultType == Pointee) 1022 return T; 1023 1024 ResultType = Context.getBlockPointerType(ResultType); 1025 } else if (const FunctionType *F = T->getAs<FunctionType>()) { 1026 if (F->getExtInfo() == Info) 1027 return T; 1028 1029 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(F)) { 1030 ResultType = Context.getFunctionNoProtoType(FNPT->getResultType(), 1031 Info); 1032 } else { 1033 const FunctionProtoType *FPT = cast<FunctionProtoType>(F); 1034 ResultType 1035 = Context.getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1036 FPT->getNumArgs(), FPT->isVariadic(), 1037 FPT->getTypeQuals(), 1038 FPT->hasExceptionSpec(), 1039 FPT->hasAnyExceptionSpec(), 1040 FPT->getNumExceptions(), 1041 FPT->exception_begin(), 1042 Info); 1043 } 1044 } else 1045 return T; 1046 1047 return Context.getQualifiedType(ResultType, T.getLocalQualifiers()); 1048} 1049 1050QualType ASTContext::getNoReturnType(QualType T, bool AddNoReturn) { 1051 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1052 return getExtFunctionType(*this, T, 1053 Info.withNoReturn(AddNoReturn)); 1054} 1055 1056QualType ASTContext::getCallConvType(QualType T, CallingConv CallConv) { 1057 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1058 return getExtFunctionType(*this, T, 1059 Info.withCallingConv(CallConv)); 1060} 1061 1062QualType ASTContext::getRegParmType(QualType T, unsigned RegParm) { 1063 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1064 return getExtFunctionType(*this, T, 1065 Info.withRegParm(RegParm)); 1066} 1067 1068/// getComplexType - Return the uniqued reference to the type for a complex 1069/// number with the specified element type. 1070QualType ASTContext::getComplexType(QualType T) { 1071 // Unique pointers, to guarantee there is only one pointer of a particular 1072 // structure. 1073 llvm::FoldingSetNodeID ID; 1074 ComplexType::Profile(ID, T); 1075 1076 void *InsertPos = 0; 1077 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1078 return QualType(CT, 0); 1079 1080 // If the pointee type isn't canonical, this won't be a canonical type either, 1081 // so fill in the canonical type field. 1082 QualType Canonical; 1083 if (!T.isCanonical()) { 1084 Canonical = getComplexType(getCanonicalType(T)); 1085 1086 // Get the new insert position for the node we care about. 1087 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1088 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1089 } 1090 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1091 Types.push_back(New); 1092 ComplexTypes.InsertNode(New, InsertPos); 1093 return QualType(New, 0); 1094} 1095 1096/// getPointerType - Return the uniqued reference to the type for a pointer to 1097/// the specified type. 1098QualType ASTContext::getPointerType(QualType T) { 1099 // Unique pointers, to guarantee there is only one pointer of a particular 1100 // structure. 1101 llvm::FoldingSetNodeID ID; 1102 PointerType::Profile(ID, T); 1103 1104 void *InsertPos = 0; 1105 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1106 return QualType(PT, 0); 1107 1108 // If the pointee type isn't canonical, this won't be a canonical type either, 1109 // so fill in the canonical type field. 1110 QualType Canonical; 1111 if (!T.isCanonical()) { 1112 Canonical = getPointerType(getCanonicalType(T)); 1113 1114 // Get the new insert position for the node we care about. 1115 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1116 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1117 } 1118 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1119 Types.push_back(New); 1120 PointerTypes.InsertNode(New, InsertPos); 1121 return QualType(New, 0); 1122} 1123 1124/// getBlockPointerType - Return the uniqued reference to the type for 1125/// a pointer to the specified block. 1126QualType ASTContext::getBlockPointerType(QualType T) { 1127 assert(T->isFunctionType() && "block of function types only"); 1128 // Unique pointers, to guarantee there is only one block of a particular 1129 // structure. 1130 llvm::FoldingSetNodeID ID; 1131 BlockPointerType::Profile(ID, T); 1132 1133 void *InsertPos = 0; 1134 if (BlockPointerType *PT = 1135 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1136 return QualType(PT, 0); 1137 1138 // If the block pointee type isn't canonical, this won't be a canonical 1139 // type either so fill in the canonical type field. 1140 QualType Canonical; 1141 if (!T.isCanonical()) { 1142 Canonical = getBlockPointerType(getCanonicalType(T)); 1143 1144 // Get the new insert position for the node we care about. 1145 BlockPointerType *NewIP = 1146 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1147 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1148 } 1149 BlockPointerType *New 1150 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1151 Types.push_back(New); 1152 BlockPointerTypes.InsertNode(New, InsertPos); 1153 return QualType(New, 0); 1154} 1155 1156/// getLValueReferenceType - Return the uniqued reference to the type for an 1157/// lvalue reference to the specified type. 1158QualType ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) { 1159 // Unique pointers, to guarantee there is only one pointer of a particular 1160 // structure. 1161 llvm::FoldingSetNodeID ID; 1162 ReferenceType::Profile(ID, T, SpelledAsLValue); 1163 1164 void *InsertPos = 0; 1165 if (LValueReferenceType *RT = 1166 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1167 return QualType(RT, 0); 1168 1169 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1170 1171 // If the referencee type isn't canonical, this won't be a canonical type 1172 // either, so fill in the canonical type field. 1173 QualType Canonical; 1174 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1175 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1176 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1177 1178 // Get the new insert position for the node we care about. 1179 LValueReferenceType *NewIP = 1180 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1181 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1182 } 1183 1184 LValueReferenceType *New 1185 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1186 SpelledAsLValue); 1187 Types.push_back(New); 1188 LValueReferenceTypes.InsertNode(New, InsertPos); 1189 1190 return QualType(New, 0); 1191} 1192 1193/// getRValueReferenceType - Return the uniqued reference to the type for an 1194/// rvalue reference to the specified type. 1195QualType ASTContext::getRValueReferenceType(QualType T) { 1196 // Unique pointers, to guarantee there is only one pointer of a particular 1197 // structure. 1198 llvm::FoldingSetNodeID ID; 1199 ReferenceType::Profile(ID, T, false); 1200 1201 void *InsertPos = 0; 1202 if (RValueReferenceType *RT = 1203 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1204 return QualType(RT, 0); 1205 1206 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1207 1208 // If the referencee type isn't canonical, this won't be a canonical type 1209 // either, so fill in the canonical type field. 1210 QualType Canonical; 1211 if (InnerRef || !T.isCanonical()) { 1212 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1213 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1214 1215 // Get the new insert position for the node we care about. 1216 RValueReferenceType *NewIP = 1217 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1218 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1219 } 1220 1221 RValueReferenceType *New 1222 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1223 Types.push_back(New); 1224 RValueReferenceTypes.InsertNode(New, InsertPos); 1225 return QualType(New, 0); 1226} 1227 1228/// getMemberPointerType - Return the uniqued reference to the type for a 1229/// member pointer to the specified type, in the specified class. 1230QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) { 1231 // Unique pointers, to guarantee there is only one pointer of a particular 1232 // structure. 1233 llvm::FoldingSetNodeID ID; 1234 MemberPointerType::Profile(ID, T, Cls); 1235 1236 void *InsertPos = 0; 1237 if (MemberPointerType *PT = 1238 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1239 return QualType(PT, 0); 1240 1241 // If the pointee or class type isn't canonical, this won't be a canonical 1242 // type either, so fill in the canonical type field. 1243 QualType Canonical; 1244 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1245 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1246 1247 // Get the new insert position for the node we care about. 1248 MemberPointerType *NewIP = 1249 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1250 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1251 } 1252 MemberPointerType *New 1253 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1254 Types.push_back(New); 1255 MemberPointerTypes.InsertNode(New, InsertPos); 1256 return QualType(New, 0); 1257} 1258 1259/// getConstantArrayType - Return the unique reference to the type for an 1260/// array of the specified element type. 1261QualType ASTContext::getConstantArrayType(QualType EltTy, 1262 const llvm::APInt &ArySizeIn, 1263 ArrayType::ArraySizeModifier ASM, 1264 unsigned EltTypeQuals) { 1265 assert((EltTy->isDependentType() || 1266 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1267 "Constant array of VLAs is illegal!"); 1268 1269 // Convert the array size into a canonical width matching the pointer size for 1270 // the target. 1271 llvm::APInt ArySize(ArySizeIn); 1272 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1273 1274 llvm::FoldingSetNodeID ID; 1275 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1276 1277 void *InsertPos = 0; 1278 if (ConstantArrayType *ATP = 1279 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1280 return QualType(ATP, 0); 1281 1282 // If the element type isn't canonical, this won't be a canonical type either, 1283 // so fill in the canonical type field. 1284 QualType Canonical; 1285 if (!EltTy.isCanonical()) { 1286 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1287 ASM, EltTypeQuals); 1288 // Get the new insert position for the node we care about. 1289 ConstantArrayType *NewIP = 1290 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1291 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1292 } 1293 1294 ConstantArrayType *New = new(*this,TypeAlignment) 1295 ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1296 ConstantArrayTypes.InsertNode(New, InsertPos); 1297 Types.push_back(New); 1298 return QualType(New, 0); 1299} 1300 1301/// getVariableArrayType - Returns a non-unique reference to the type for a 1302/// variable array of the specified element type. 1303QualType ASTContext::getVariableArrayType(QualType EltTy, 1304 Expr *NumElts, 1305 ArrayType::ArraySizeModifier ASM, 1306 unsigned EltTypeQuals, 1307 SourceRange Brackets) { 1308 // Since we don't unique expressions, it isn't possible to unique VLA's 1309 // that have an expression provided for their size. 1310 QualType CanonType; 1311 1312 if (!EltTy.isCanonical()) { 1313 if (NumElts) 1314 NumElts->Retain(); 1315 CanonType = getVariableArrayType(getCanonicalType(EltTy), NumElts, ASM, 1316 EltTypeQuals, Brackets); 1317 } 1318 1319 VariableArrayType *New = new(*this, TypeAlignment) 1320 VariableArrayType(EltTy, CanonType, NumElts, ASM, EltTypeQuals, Brackets); 1321 1322 VariableArrayTypes.push_back(New); 1323 Types.push_back(New); 1324 return QualType(New, 0); 1325} 1326 1327/// getDependentSizedArrayType - Returns a non-unique reference to 1328/// the type for a dependently-sized array of the specified element 1329/// type. 1330QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1331 Expr *NumElts, 1332 ArrayType::ArraySizeModifier ASM, 1333 unsigned EltTypeQuals, 1334 SourceRange Brackets) { 1335 assert((!NumElts || NumElts->isTypeDependent() || 1336 NumElts->isValueDependent()) && 1337 "Size must be type- or value-dependent!"); 1338 1339 void *InsertPos = 0; 1340 DependentSizedArrayType *Canon = 0; 1341 llvm::FoldingSetNodeID ID; 1342 1343 if (NumElts) { 1344 // Dependently-sized array types that do not have a specified 1345 // number of elements will have their sizes deduced from an 1346 // initializer. 1347 DependentSizedArrayType::Profile(ID, *this, getCanonicalType(EltTy), ASM, 1348 EltTypeQuals, NumElts); 1349 1350 Canon = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1351 } 1352 1353 DependentSizedArrayType *New; 1354 if (Canon) { 1355 // We already have a canonical version of this array type; use it as 1356 // the canonical type for a newly-built type. 1357 New = new (*this, TypeAlignment) 1358 DependentSizedArrayType(*this, EltTy, QualType(Canon, 0), 1359 NumElts, ASM, EltTypeQuals, Brackets); 1360 } else { 1361 QualType CanonEltTy = getCanonicalType(EltTy); 1362 if (CanonEltTy == EltTy) { 1363 New = new (*this, TypeAlignment) 1364 DependentSizedArrayType(*this, EltTy, QualType(), 1365 NumElts, ASM, EltTypeQuals, Brackets); 1366 1367 if (NumElts) { 1368 DependentSizedArrayType *CanonCheck 1369 = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1370 assert(!CanonCheck && "Dependent-sized canonical array type broken"); 1371 (void)CanonCheck; 1372 DependentSizedArrayTypes.InsertNode(New, InsertPos); 1373 } 1374 } else { 1375 QualType Canon = getDependentSizedArrayType(CanonEltTy, NumElts, 1376 ASM, EltTypeQuals, 1377 SourceRange()); 1378 New = new (*this, TypeAlignment) 1379 DependentSizedArrayType(*this, EltTy, Canon, 1380 NumElts, ASM, EltTypeQuals, Brackets); 1381 } 1382 } 1383 1384 Types.push_back(New); 1385 return QualType(New, 0); 1386} 1387 1388QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1389 ArrayType::ArraySizeModifier ASM, 1390 unsigned EltTypeQuals) { 1391 llvm::FoldingSetNodeID ID; 1392 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1393 1394 void *InsertPos = 0; 1395 if (IncompleteArrayType *ATP = 1396 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1397 return QualType(ATP, 0); 1398 1399 // If the element type isn't canonical, this won't be a canonical type 1400 // either, so fill in the canonical type field. 1401 QualType Canonical; 1402 1403 if (!EltTy.isCanonical()) { 1404 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1405 ASM, EltTypeQuals); 1406 1407 // Get the new insert position for the node we care about. 1408 IncompleteArrayType *NewIP = 1409 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1410 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1411 } 1412 1413 IncompleteArrayType *New = new (*this, TypeAlignment) 1414 IncompleteArrayType(EltTy, Canonical, ASM, EltTypeQuals); 1415 1416 IncompleteArrayTypes.InsertNode(New, InsertPos); 1417 Types.push_back(New); 1418 return QualType(New, 0); 1419} 1420 1421/// getVectorType - Return the unique reference to a vector type of 1422/// the specified element type and size. VectorType must be a built-in type. 1423QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1424 bool IsAltiVec, bool IsPixel) { 1425 BuiltinType *baseType; 1426 1427 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1428 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1429 1430 // Check if we've already instantiated a vector of this type. 1431 llvm::FoldingSetNodeID ID; 1432 VectorType::Profile(ID, vecType, NumElts, Type::Vector, 1433 IsAltiVec, IsPixel); 1434 void *InsertPos = 0; 1435 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1436 return QualType(VTP, 0); 1437 1438 // If the element type isn't canonical, this won't be a canonical type either, 1439 // so fill in the canonical type field. 1440 QualType Canonical; 1441 if (!vecType.isCanonical() || IsAltiVec || IsPixel) { 1442 Canonical = getVectorType(getCanonicalType(vecType), 1443 NumElts, false, false); 1444 1445 // Get the new insert position for the node we care about. 1446 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1447 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1448 } 1449 VectorType *New = new (*this, TypeAlignment) 1450 VectorType(vecType, NumElts, Canonical, IsAltiVec, IsPixel); 1451 VectorTypes.InsertNode(New, InsertPos); 1452 Types.push_back(New); 1453 return QualType(New, 0); 1454} 1455 1456/// getExtVectorType - Return the unique reference to an extended vector type of 1457/// the specified element type and size. VectorType must be a built-in type. 1458QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1459 BuiltinType *baseType; 1460 1461 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1462 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1463 1464 // Check if we've already instantiated a vector of this type. 1465 llvm::FoldingSetNodeID ID; 1466 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, false, false); 1467 void *InsertPos = 0; 1468 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1469 return QualType(VTP, 0); 1470 1471 // If the element type isn't canonical, this won't be a canonical type either, 1472 // so fill in the canonical type field. 1473 QualType Canonical; 1474 if (!vecType.isCanonical()) { 1475 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1476 1477 // Get the new insert position for the node we care about. 1478 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1479 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1480 } 1481 ExtVectorType *New = new (*this, TypeAlignment) 1482 ExtVectorType(vecType, NumElts, Canonical); 1483 VectorTypes.InsertNode(New, InsertPos); 1484 Types.push_back(New); 1485 return QualType(New, 0); 1486} 1487 1488QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1489 Expr *SizeExpr, 1490 SourceLocation AttrLoc) { 1491 llvm::FoldingSetNodeID ID; 1492 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1493 SizeExpr); 1494 1495 void *InsertPos = 0; 1496 DependentSizedExtVectorType *Canon 1497 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1498 DependentSizedExtVectorType *New; 1499 if (Canon) { 1500 // We already have a canonical version of this array type; use it as 1501 // the canonical type for a newly-built type. 1502 New = new (*this, TypeAlignment) 1503 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1504 SizeExpr, AttrLoc); 1505 } else { 1506 QualType CanonVecTy = getCanonicalType(vecType); 1507 if (CanonVecTy == vecType) { 1508 New = new (*this, TypeAlignment) 1509 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1510 AttrLoc); 1511 1512 DependentSizedExtVectorType *CanonCheck 1513 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1514 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1515 (void)CanonCheck; 1516 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1517 } else { 1518 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1519 SourceLocation()); 1520 New = new (*this, TypeAlignment) 1521 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1522 } 1523 } 1524 1525 Types.push_back(New); 1526 return QualType(New, 0); 1527} 1528 1529/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1530/// 1531QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, 1532 const FunctionType::ExtInfo &Info) { 1533 const CallingConv CallConv = Info.getCC(); 1534 // Unique functions, to guarantee there is only one function of a particular 1535 // structure. 1536 llvm::FoldingSetNodeID ID; 1537 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1538 1539 void *InsertPos = 0; 1540 if (FunctionNoProtoType *FT = 1541 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1542 return QualType(FT, 0); 1543 1544 QualType Canonical; 1545 if (!ResultTy.isCanonical() || 1546 getCanonicalCallConv(CallConv) != CallConv) { 1547 Canonical = 1548 getFunctionNoProtoType(getCanonicalType(ResultTy), 1549 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1550 1551 // Get the new insert position for the node we care about. 1552 FunctionNoProtoType *NewIP = 1553 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1554 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1555 } 1556 1557 FunctionNoProtoType *New = new (*this, TypeAlignment) 1558 FunctionNoProtoType(ResultTy, Canonical, Info); 1559 Types.push_back(New); 1560 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1561 return QualType(New, 0); 1562} 1563 1564/// getFunctionType - Return a normal function type with a typed argument 1565/// list. isVariadic indicates whether the argument list includes '...'. 1566QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1567 unsigned NumArgs, bool isVariadic, 1568 unsigned TypeQuals, bool hasExceptionSpec, 1569 bool hasAnyExceptionSpec, unsigned NumExs, 1570 const QualType *ExArray, 1571 const FunctionType::ExtInfo &Info) { 1572 const CallingConv CallConv= Info.getCC(); 1573 // Unique functions, to guarantee there is only one function of a particular 1574 // structure. 1575 llvm::FoldingSetNodeID ID; 1576 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1577 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1578 NumExs, ExArray, Info); 1579 1580 void *InsertPos = 0; 1581 if (FunctionProtoType *FTP = 1582 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1583 return QualType(FTP, 0); 1584 1585 // Determine whether the type being created is already canonical or not. 1586 bool isCanonical = !hasExceptionSpec && ResultTy.isCanonical(); 1587 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1588 if (!ArgArray[i].isCanonicalAsParam()) 1589 isCanonical = false; 1590 1591 // If this type isn't canonical, get the canonical version of it. 1592 // The exception spec is not part of the canonical type. 1593 QualType Canonical; 1594 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1595 llvm::SmallVector<QualType, 16> CanonicalArgs; 1596 CanonicalArgs.reserve(NumArgs); 1597 for (unsigned i = 0; i != NumArgs; ++i) 1598 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1599 1600 Canonical = getFunctionType(getCanonicalType(ResultTy), 1601 CanonicalArgs.data(), NumArgs, 1602 isVariadic, TypeQuals, false, 1603 false, 0, 0, 1604 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1605 1606 // Get the new insert position for the node we care about. 1607 FunctionProtoType *NewIP = 1608 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1609 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1610 } 1611 1612 // FunctionProtoType objects are allocated with extra bytes after them 1613 // for two variable size arrays (for parameter and exception types) at the 1614 // end of them. 1615 FunctionProtoType *FTP = 1616 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1617 NumArgs*sizeof(QualType) + 1618 NumExs*sizeof(QualType), TypeAlignment); 1619 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1620 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1621 ExArray, NumExs, Canonical, Info); 1622 Types.push_back(FTP); 1623 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1624 return QualType(FTP, 0); 1625} 1626 1627#ifndef NDEBUG 1628static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1629 if (!isa<CXXRecordDecl>(D)) return false; 1630 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1631 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1632 return true; 1633 if (RD->getDescribedClassTemplate() && 1634 !isa<ClassTemplateSpecializationDecl>(RD)) 1635 return true; 1636 return false; 1637} 1638#endif 1639 1640/// getInjectedClassNameType - Return the unique reference to the 1641/// injected class name type for the specified templated declaration. 1642QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1643 QualType TST) { 1644 assert(NeedsInjectedClassNameType(Decl)); 1645 if (Decl->TypeForDecl) { 1646 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1647 } else if (CXXRecordDecl *PrevDecl 1648 = cast_or_null<CXXRecordDecl>(Decl->getPreviousDeclaration())) { 1649 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1650 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1651 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1652 } else { 1653 Decl->TypeForDecl = 1654 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 1655 Types.push_back(Decl->TypeForDecl); 1656 } 1657 return QualType(Decl->TypeForDecl, 0); 1658} 1659 1660/// getTypeDeclType - Return the unique reference to the type for the 1661/// specified type declaration. 1662QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) { 1663 assert(Decl && "Passed null for Decl param"); 1664 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 1665 1666 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1667 return getTypedefType(Typedef); 1668 1669 assert(!isa<TemplateTypeParmDecl>(Decl) && 1670 "Template type parameter types are always available."); 1671 1672 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1673 assert(!Record->getPreviousDeclaration() && 1674 "struct/union has previous declaration"); 1675 assert(!NeedsInjectedClassNameType(Record)); 1676 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Record); 1677 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1678 assert(!Enum->getPreviousDeclaration() && 1679 "enum has previous declaration"); 1680 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Enum); 1681 } else if (const UnresolvedUsingTypenameDecl *Using = 1682 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1683 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1684 } else 1685 llvm_unreachable("TypeDecl without a type?"); 1686 1687 Types.push_back(Decl->TypeForDecl); 1688 return QualType(Decl->TypeForDecl, 0); 1689} 1690 1691/// getTypedefType - Return the unique reference to the type for the 1692/// specified typename decl. 1693QualType ASTContext::getTypedefType(const TypedefDecl *Decl) { 1694 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1695 1696 QualType Canonical = getCanonicalType(Decl->getUnderlyingType()); 1697 Decl->TypeForDecl = new(*this, TypeAlignment) 1698 TypedefType(Type::Typedef, Decl, Canonical); 1699 Types.push_back(Decl->TypeForDecl); 1700 return QualType(Decl->TypeForDecl, 0); 1701} 1702 1703/// \brief Retrieve a substitution-result type. 1704QualType 1705ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1706 QualType Replacement) { 1707 assert(Replacement.isCanonical() 1708 && "replacement types must always be canonical"); 1709 1710 llvm::FoldingSetNodeID ID; 1711 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1712 void *InsertPos = 0; 1713 SubstTemplateTypeParmType *SubstParm 1714 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1715 1716 if (!SubstParm) { 1717 SubstParm = new (*this, TypeAlignment) 1718 SubstTemplateTypeParmType(Parm, Replacement); 1719 Types.push_back(SubstParm); 1720 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1721 } 1722 1723 return QualType(SubstParm, 0); 1724} 1725 1726/// \brief Retrieve the template type parameter type for a template 1727/// parameter or parameter pack with the given depth, index, and (optionally) 1728/// name. 1729QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1730 bool ParameterPack, 1731 IdentifierInfo *Name) { 1732 llvm::FoldingSetNodeID ID; 1733 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1734 void *InsertPos = 0; 1735 TemplateTypeParmType *TypeParm 1736 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1737 1738 if (TypeParm) 1739 return QualType(TypeParm, 0); 1740 1741 if (Name) { 1742 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1743 TypeParm = new (*this, TypeAlignment) 1744 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 1745 1746 TemplateTypeParmType *TypeCheck 1747 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1748 assert(!TypeCheck && "Template type parameter canonical type broken"); 1749 (void)TypeCheck; 1750 } else 1751 TypeParm = new (*this, TypeAlignment) 1752 TemplateTypeParmType(Depth, Index, ParameterPack); 1753 1754 Types.push_back(TypeParm); 1755 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1756 1757 return QualType(TypeParm, 0); 1758} 1759 1760TypeSourceInfo * 1761ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 1762 SourceLocation NameLoc, 1763 const TemplateArgumentListInfo &Args, 1764 QualType CanonType) { 1765 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 1766 1767 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 1768 TemplateSpecializationTypeLoc TL 1769 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 1770 TL.setTemplateNameLoc(NameLoc); 1771 TL.setLAngleLoc(Args.getLAngleLoc()); 1772 TL.setRAngleLoc(Args.getRAngleLoc()); 1773 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 1774 TL.setArgLocInfo(i, Args[i].getLocInfo()); 1775 return DI; 1776} 1777 1778QualType 1779ASTContext::getTemplateSpecializationType(TemplateName Template, 1780 const TemplateArgumentListInfo &Args, 1781 QualType Canon, 1782 bool IsCurrentInstantiation) { 1783 unsigned NumArgs = Args.size(); 1784 1785 llvm::SmallVector<TemplateArgument, 4> ArgVec; 1786 ArgVec.reserve(NumArgs); 1787 for (unsigned i = 0; i != NumArgs; ++i) 1788 ArgVec.push_back(Args[i].getArgument()); 1789 1790 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 1791 Canon, IsCurrentInstantiation); 1792} 1793 1794QualType 1795ASTContext::getTemplateSpecializationType(TemplateName Template, 1796 const TemplateArgument *Args, 1797 unsigned NumArgs, 1798 QualType Canon, 1799 bool IsCurrentInstantiation) { 1800 if (!Canon.isNull()) 1801 Canon = getCanonicalType(Canon); 1802 else { 1803 assert(!IsCurrentInstantiation && 1804 "current-instantiation specializations should always " 1805 "have a canonical type"); 1806 1807 // Build the canonical template specialization type. 1808 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 1809 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 1810 CanonArgs.reserve(NumArgs); 1811 for (unsigned I = 0; I != NumArgs; ++I) 1812 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 1813 1814 // Determine whether this canonical template specialization type already 1815 // exists. 1816 llvm::FoldingSetNodeID ID; 1817 TemplateSpecializationType::Profile(ID, CanonTemplate, false, 1818 CanonArgs.data(), NumArgs, *this); 1819 1820 void *InsertPos = 0; 1821 TemplateSpecializationType *Spec 1822 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1823 1824 if (!Spec) { 1825 // Allocate a new canonical template specialization type. 1826 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1827 sizeof(TemplateArgument) * NumArgs), 1828 TypeAlignment); 1829 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, false, 1830 CanonArgs.data(), NumArgs, 1831 Canon); 1832 Types.push_back(Spec); 1833 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1834 } 1835 1836 if (Canon.isNull()) 1837 Canon = QualType(Spec, 0); 1838 assert(Canon->isDependentType() && 1839 "Non-dependent template-id type must have a canonical type"); 1840 } 1841 1842 // Allocate the (non-canonical) template specialization type, but don't 1843 // try to unique it: these types typically have location information that 1844 // we don't unique and don't want to lose. 1845 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1846 sizeof(TemplateArgument) * NumArgs), 1847 TypeAlignment); 1848 TemplateSpecializationType *Spec 1849 = new (Mem) TemplateSpecializationType(Template, 1850 IsCurrentInstantiation, 1851 Args, NumArgs, 1852 Canon); 1853 1854 Types.push_back(Spec); 1855 return QualType(Spec, 0); 1856} 1857 1858QualType 1859ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 1860 NestedNameSpecifier *NNS, 1861 QualType NamedType) { 1862 llvm::FoldingSetNodeID ID; 1863 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 1864 1865 void *InsertPos = 0; 1866 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1867 if (T) 1868 return QualType(T, 0); 1869 1870 QualType Canon = NamedType; 1871 if (!Canon.isCanonical()) { 1872 Canon = getCanonicalType(NamedType); 1873 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1874 assert(!CheckT && "Elaborated canonical type broken"); 1875 (void)CheckT; 1876 } 1877 1878 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 1879 Types.push_back(T); 1880 ElaboratedTypes.InsertNode(T, InsertPos); 1881 return QualType(T, 0); 1882} 1883 1884QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 1885 NestedNameSpecifier *NNS, 1886 const IdentifierInfo *Name, 1887 QualType Canon) { 1888 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1889 1890 if (Canon.isNull()) { 1891 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1892 ElaboratedTypeKeyword CanonKeyword = Keyword; 1893 if (Keyword == ETK_None) 1894 CanonKeyword = ETK_Typename; 1895 1896 if (CanonNNS != NNS || CanonKeyword != Keyword) 1897 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 1898 } 1899 1900 llvm::FoldingSetNodeID ID; 1901 DependentNameType::Profile(ID, Keyword, NNS, Name); 1902 1903 void *InsertPos = 0; 1904 DependentNameType *T 1905 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1906 if (T) 1907 return QualType(T, 0); 1908 1909 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 1910 Types.push_back(T); 1911 DependentNameTypes.InsertNode(T, InsertPos); 1912 return QualType(T, 0); 1913} 1914 1915QualType 1916ASTContext::getDependentTemplateSpecializationType( 1917 ElaboratedTypeKeyword Keyword, 1918 NestedNameSpecifier *NNS, 1919 const IdentifierInfo *Name, 1920 const TemplateArgumentListInfo &Args) { 1921 // TODO: avoid this copy 1922 llvm::SmallVector<TemplateArgument, 16> ArgCopy; 1923 for (unsigned I = 0, E = Args.size(); I != E; ++I) 1924 ArgCopy.push_back(Args[I].getArgument()); 1925 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 1926 ArgCopy.size(), 1927 ArgCopy.data()); 1928} 1929 1930QualType 1931ASTContext::getDependentTemplateSpecializationType( 1932 ElaboratedTypeKeyword Keyword, 1933 NestedNameSpecifier *NNS, 1934 const IdentifierInfo *Name, 1935 unsigned NumArgs, 1936 const TemplateArgument *Args) { 1937 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1938 1939 llvm::FoldingSetNodeID ID; 1940 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 1941 Name, NumArgs, Args); 1942 1943 void *InsertPos = 0; 1944 DependentTemplateSpecializationType *T 1945 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1946 if (T) 1947 return QualType(T, 0); 1948 1949 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1950 1951 ElaboratedTypeKeyword CanonKeyword = Keyword; 1952 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 1953 1954 bool AnyNonCanonArgs = false; 1955 llvm::SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 1956 for (unsigned I = 0; I != NumArgs; ++I) { 1957 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 1958 if (!CanonArgs[I].structurallyEquals(Args[I])) 1959 AnyNonCanonArgs = true; 1960 } 1961 1962 QualType Canon; 1963 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 1964 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 1965 Name, NumArgs, 1966 CanonArgs.data()); 1967 1968 // Find the insert position again. 1969 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1970 } 1971 1972 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 1973 sizeof(TemplateArgument) * NumArgs), 1974 TypeAlignment); 1975 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 1976 Name, NumArgs, Args, Canon); 1977 Types.push_back(T); 1978 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 1979 return QualType(T, 0); 1980} 1981 1982/// CmpProtocolNames - Comparison predicate for sorting protocols 1983/// alphabetically. 1984static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 1985 const ObjCProtocolDecl *RHS) { 1986 return LHS->getDeclName() < RHS->getDeclName(); 1987} 1988 1989static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 1990 unsigned NumProtocols) { 1991 if (NumProtocols == 0) return true; 1992 1993 for (unsigned i = 1; i != NumProtocols; ++i) 1994 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 1995 return false; 1996 return true; 1997} 1998 1999static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2000 unsigned &NumProtocols) { 2001 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2002 2003 // Sort protocols, keyed by name. 2004 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2005 2006 // Remove duplicates. 2007 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2008 NumProtocols = ProtocolsEnd-Protocols; 2009} 2010 2011QualType ASTContext::getObjCObjectType(QualType BaseType, 2012 ObjCProtocolDecl * const *Protocols, 2013 unsigned NumProtocols) { 2014 // If the base type is an interface and there aren't any protocols 2015 // to add, then the interface type will do just fine. 2016 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2017 return BaseType; 2018 2019 // Look in the folding set for an existing type. 2020 llvm::FoldingSetNodeID ID; 2021 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2022 void *InsertPos = 0; 2023 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2024 return QualType(QT, 0); 2025 2026 // Build the canonical type, which has the canonical base type and 2027 // a sorted-and-uniqued list of protocols. 2028 QualType Canonical; 2029 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2030 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2031 if (!ProtocolsSorted) { 2032 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2033 Protocols + NumProtocols); 2034 unsigned UniqueCount = NumProtocols; 2035 2036 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2037 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2038 &Sorted[0], UniqueCount); 2039 } else { 2040 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2041 Protocols, NumProtocols); 2042 } 2043 2044 // Regenerate InsertPos. 2045 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2046 } 2047 2048 unsigned Size = sizeof(ObjCObjectTypeImpl); 2049 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2050 void *Mem = Allocate(Size, TypeAlignment); 2051 ObjCObjectTypeImpl *T = 2052 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2053 2054 Types.push_back(T); 2055 ObjCObjectTypes.InsertNode(T, InsertPos); 2056 return QualType(T, 0); 2057} 2058 2059/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2060/// the given object type. 2061QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) { 2062 llvm::FoldingSetNodeID ID; 2063 ObjCObjectPointerType::Profile(ID, ObjectT); 2064 2065 void *InsertPos = 0; 2066 if (ObjCObjectPointerType *QT = 2067 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2068 return QualType(QT, 0); 2069 2070 // Find the canonical object type. 2071 QualType Canonical; 2072 if (!ObjectT.isCanonical()) { 2073 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2074 2075 // Regenerate InsertPos. 2076 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2077 } 2078 2079 // No match. 2080 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2081 ObjCObjectPointerType *QType = 2082 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2083 2084 Types.push_back(QType); 2085 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2086 return QualType(QType, 0); 2087} 2088 2089/// getObjCInterfaceType - Return the unique reference to the type for the 2090/// specified ObjC interface decl. The list of protocols is optional. 2091QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) { 2092 if (Decl->TypeForDecl) 2093 return QualType(Decl->TypeForDecl, 0); 2094 2095 // FIXME: redeclarations? 2096 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2097 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2098 Decl->TypeForDecl = T; 2099 Types.push_back(T); 2100 return QualType(T, 0); 2101} 2102 2103/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2104/// TypeOfExprType AST's (since expression's are never shared). For example, 2105/// multiple declarations that refer to "typeof(x)" all contain different 2106/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2107/// on canonical type's (which are always unique). 2108QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2109 TypeOfExprType *toe; 2110 if (tofExpr->isTypeDependent()) { 2111 llvm::FoldingSetNodeID ID; 2112 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2113 2114 void *InsertPos = 0; 2115 DependentTypeOfExprType *Canon 2116 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2117 if (Canon) { 2118 // We already have a "canonical" version of an identical, dependent 2119 // typeof(expr) type. Use that as our canonical type. 2120 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2121 QualType((TypeOfExprType*)Canon, 0)); 2122 } 2123 else { 2124 // Build a new, canonical typeof(expr) type. 2125 Canon 2126 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2127 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2128 toe = Canon; 2129 } 2130 } else { 2131 QualType Canonical = getCanonicalType(tofExpr->getType()); 2132 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2133 } 2134 Types.push_back(toe); 2135 return QualType(toe, 0); 2136} 2137 2138/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2139/// TypeOfType AST's. The only motivation to unique these nodes would be 2140/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2141/// an issue. This doesn't effect the type checker, since it operates 2142/// on canonical type's (which are always unique). 2143QualType ASTContext::getTypeOfType(QualType tofType) { 2144 QualType Canonical = getCanonicalType(tofType); 2145 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2146 Types.push_back(tot); 2147 return QualType(tot, 0); 2148} 2149 2150/// getDecltypeForExpr - Given an expr, will return the decltype for that 2151/// expression, according to the rules in C++0x [dcl.type.simple]p4 2152static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2153 if (e->isTypeDependent()) 2154 return Context.DependentTy; 2155 2156 // If e is an id expression or a class member access, decltype(e) is defined 2157 // as the type of the entity named by e. 2158 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2159 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2160 return VD->getType(); 2161 } 2162 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2163 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2164 return FD->getType(); 2165 } 2166 // If e is a function call or an invocation of an overloaded operator, 2167 // (parentheses around e are ignored), decltype(e) is defined as the 2168 // return type of that function. 2169 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2170 return CE->getCallReturnType(); 2171 2172 QualType T = e->getType(); 2173 2174 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2175 // defined as T&, otherwise decltype(e) is defined as T. 2176 if (e->isLvalue(Context) == Expr::LV_Valid) 2177 T = Context.getLValueReferenceType(T); 2178 2179 return T; 2180} 2181 2182/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2183/// DecltypeType AST's. The only motivation to unique these nodes would be 2184/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2185/// an issue. This doesn't effect the type checker, since it operates 2186/// on canonical type's (which are always unique). 2187QualType ASTContext::getDecltypeType(Expr *e) { 2188 DecltypeType *dt; 2189 if (e->isTypeDependent()) { 2190 llvm::FoldingSetNodeID ID; 2191 DependentDecltypeType::Profile(ID, *this, e); 2192 2193 void *InsertPos = 0; 2194 DependentDecltypeType *Canon 2195 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2196 if (Canon) { 2197 // We already have a "canonical" version of an equivalent, dependent 2198 // decltype type. Use that as our canonical type. 2199 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2200 QualType((DecltypeType*)Canon, 0)); 2201 } 2202 else { 2203 // Build a new, canonical typeof(expr) type. 2204 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2205 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2206 dt = Canon; 2207 } 2208 } else { 2209 QualType T = getDecltypeForExpr(e, *this); 2210 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2211 } 2212 Types.push_back(dt); 2213 return QualType(dt, 0); 2214} 2215 2216/// getTagDeclType - Return the unique reference to the type for the 2217/// specified TagDecl (struct/union/class/enum) decl. 2218QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2219 assert (Decl); 2220 // FIXME: What is the design on getTagDeclType when it requires casting 2221 // away const? mutable? 2222 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2223} 2224 2225/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2226/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2227/// needs to agree with the definition in <stddef.h>. 2228CanQualType ASTContext::getSizeType() const { 2229 return getFromTargetType(Target.getSizeType()); 2230} 2231 2232/// getSignedWCharType - Return the type of "signed wchar_t". 2233/// Used when in C++, as a GCC extension. 2234QualType ASTContext::getSignedWCharType() const { 2235 // FIXME: derive from "Target" ? 2236 return WCharTy; 2237} 2238 2239/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2240/// Used when in C++, as a GCC extension. 2241QualType ASTContext::getUnsignedWCharType() const { 2242 // FIXME: derive from "Target" ? 2243 return UnsignedIntTy; 2244} 2245 2246/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2247/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2248QualType ASTContext::getPointerDiffType() const { 2249 return getFromTargetType(Target.getPtrDiffType(0)); 2250} 2251 2252//===----------------------------------------------------------------------===// 2253// Type Operators 2254//===----------------------------------------------------------------------===// 2255 2256CanQualType ASTContext::getCanonicalParamType(QualType T) { 2257 // Push qualifiers into arrays, and then discard any remaining 2258 // qualifiers. 2259 T = getCanonicalType(T); 2260 const Type *Ty = T.getTypePtr(); 2261 2262 QualType Result; 2263 if (isa<ArrayType>(Ty)) { 2264 Result = getArrayDecayedType(QualType(Ty,0)); 2265 } else if (isa<FunctionType>(Ty)) { 2266 Result = getPointerType(QualType(Ty, 0)); 2267 } else { 2268 Result = QualType(Ty, 0); 2269 } 2270 2271 return CanQualType::CreateUnsafe(Result); 2272} 2273 2274/// getCanonicalType - Return the canonical (structural) type corresponding to 2275/// the specified potentially non-canonical type. The non-canonical version 2276/// of a type may have many "decorated" versions of types. Decorators can 2277/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2278/// to be free of any of these, allowing two canonical types to be compared 2279/// for exact equality with a simple pointer comparison. 2280CanQualType ASTContext::getCanonicalType(QualType T) { 2281 QualifierCollector Quals; 2282 const Type *Ptr = Quals.strip(T); 2283 QualType CanType = Ptr->getCanonicalTypeInternal(); 2284 2285 // The canonical internal type will be the canonical type *except* 2286 // that we push type qualifiers down through array types. 2287 2288 // If there are no new qualifiers to push down, stop here. 2289 if (!Quals.hasQualifiers()) 2290 return CanQualType::CreateUnsafe(CanType); 2291 2292 // If the type qualifiers are on an array type, get the canonical 2293 // type of the array with the qualifiers applied to the element 2294 // type. 2295 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2296 if (!AT) 2297 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2298 2299 // Get the canonical version of the element with the extra qualifiers on it. 2300 // This can recursively sink qualifiers through multiple levels of arrays. 2301 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2302 NewEltTy = getCanonicalType(NewEltTy); 2303 2304 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2305 return CanQualType::CreateUnsafe( 2306 getConstantArrayType(NewEltTy, CAT->getSize(), 2307 CAT->getSizeModifier(), 2308 CAT->getIndexTypeCVRQualifiers())); 2309 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2310 return CanQualType::CreateUnsafe( 2311 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2312 IAT->getIndexTypeCVRQualifiers())); 2313 2314 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2315 return CanQualType::CreateUnsafe( 2316 getDependentSizedArrayType(NewEltTy, 2317 DSAT->getSizeExpr() ? 2318 DSAT->getSizeExpr()->Retain() : 0, 2319 DSAT->getSizeModifier(), 2320 DSAT->getIndexTypeCVRQualifiers(), 2321 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2322 2323 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2324 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2325 VAT->getSizeExpr() ? 2326 VAT->getSizeExpr()->Retain() : 0, 2327 VAT->getSizeModifier(), 2328 VAT->getIndexTypeCVRQualifiers(), 2329 VAT->getBracketsRange())); 2330} 2331 2332QualType ASTContext::getUnqualifiedArrayType(QualType T, 2333 Qualifiers &Quals) { 2334 Quals = T.getQualifiers(); 2335 const ArrayType *AT = getAsArrayType(T); 2336 if (!AT) { 2337 return T.getUnqualifiedType(); 2338 } 2339 2340 QualType Elt = AT->getElementType(); 2341 QualType UnqualElt = getUnqualifiedArrayType(Elt, Quals); 2342 if (Elt == UnqualElt) 2343 return T; 2344 2345 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 2346 return getConstantArrayType(UnqualElt, CAT->getSize(), 2347 CAT->getSizeModifier(), 0); 2348 } 2349 2350 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 2351 return getIncompleteArrayType(UnqualElt, IAT->getSizeModifier(), 0); 2352 } 2353 2354 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 2355 return getVariableArrayType(UnqualElt, 2356 VAT->getSizeExpr() ? 2357 VAT->getSizeExpr()->Retain() : 0, 2358 VAT->getSizeModifier(), 2359 VAT->getIndexTypeCVRQualifiers(), 2360 VAT->getBracketsRange()); 2361 } 2362 2363 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 2364 return getDependentSizedArrayType(UnqualElt, DSAT->getSizeExpr()->Retain(), 2365 DSAT->getSizeModifier(), 0, 2366 SourceRange()); 2367} 2368 2369/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 2370/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 2371/// they point to and return true. If T1 and T2 aren't pointer types 2372/// or pointer-to-member types, or if they are not similar at this 2373/// level, returns false and leaves T1 and T2 unchanged. Top-level 2374/// qualifiers on T1 and T2 are ignored. This function will typically 2375/// be called in a loop that successively "unwraps" pointer and 2376/// pointer-to-member types to compare them at each level. 2377bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 2378 const PointerType *T1PtrType = T1->getAs<PointerType>(), 2379 *T2PtrType = T2->getAs<PointerType>(); 2380 if (T1PtrType && T2PtrType) { 2381 T1 = T1PtrType->getPointeeType(); 2382 T2 = T2PtrType->getPointeeType(); 2383 return true; 2384 } 2385 2386 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 2387 *T2MPType = T2->getAs<MemberPointerType>(); 2388 if (T1MPType && T2MPType && 2389 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 2390 QualType(T2MPType->getClass(), 0))) { 2391 T1 = T1MPType->getPointeeType(); 2392 T2 = T2MPType->getPointeeType(); 2393 return true; 2394 } 2395 2396 if (getLangOptions().ObjC1) { 2397 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 2398 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 2399 if (T1OPType && T2OPType) { 2400 T1 = T1OPType->getPointeeType(); 2401 T2 = T2OPType->getPointeeType(); 2402 return true; 2403 } 2404 } 2405 2406 // FIXME: Block pointers, too? 2407 2408 return false; 2409} 2410 2411DeclarationName ASTContext::getNameForTemplate(TemplateName Name) { 2412 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2413 return TD->getDeclName(); 2414 2415 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2416 if (DTN->isIdentifier()) { 2417 return DeclarationNames.getIdentifier(DTN->getIdentifier()); 2418 } else { 2419 return DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2420 } 2421 } 2422 2423 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2424 assert(Storage); 2425 return (*Storage->begin())->getDeclName(); 2426} 2427 2428TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2429 // If this template name refers to a template, the canonical 2430 // template name merely stores the template itself. 2431 if (TemplateDecl *Template = Name.getAsTemplateDecl()) 2432 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2433 2434 assert(!Name.getAsOverloadedTemplate()); 2435 2436 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2437 assert(DTN && "Non-dependent template names must refer to template decls."); 2438 return DTN->CanonicalTemplateName; 2439} 2440 2441bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2442 X = getCanonicalTemplateName(X); 2443 Y = getCanonicalTemplateName(Y); 2444 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2445} 2446 2447TemplateArgument 2448ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2449 switch (Arg.getKind()) { 2450 case TemplateArgument::Null: 2451 return Arg; 2452 2453 case TemplateArgument::Expression: 2454 return Arg; 2455 2456 case TemplateArgument::Declaration: 2457 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2458 2459 case TemplateArgument::Template: 2460 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2461 2462 case TemplateArgument::Integral: 2463 return TemplateArgument(*Arg.getAsIntegral(), 2464 getCanonicalType(Arg.getIntegralType())); 2465 2466 case TemplateArgument::Type: 2467 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2468 2469 case TemplateArgument::Pack: { 2470 // FIXME: Allocate in ASTContext 2471 TemplateArgument *CanonArgs = new TemplateArgument[Arg.pack_size()]; 2472 unsigned Idx = 0; 2473 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2474 AEnd = Arg.pack_end(); 2475 A != AEnd; (void)++A, ++Idx) 2476 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2477 2478 TemplateArgument Result; 2479 Result.setArgumentPack(CanonArgs, Arg.pack_size(), false); 2480 return Result; 2481 } 2482 } 2483 2484 // Silence GCC warning 2485 assert(false && "Unhandled template argument kind"); 2486 return TemplateArgument(); 2487} 2488 2489NestedNameSpecifier * 2490ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2491 if (!NNS) 2492 return 0; 2493 2494 switch (NNS->getKind()) { 2495 case NestedNameSpecifier::Identifier: 2496 // Canonicalize the prefix but keep the identifier the same. 2497 return NestedNameSpecifier::Create(*this, 2498 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2499 NNS->getAsIdentifier()); 2500 2501 case NestedNameSpecifier::Namespace: 2502 // A namespace is canonical; build a nested-name-specifier with 2503 // this namespace and no prefix. 2504 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2505 2506 case NestedNameSpecifier::TypeSpec: 2507 case NestedNameSpecifier::TypeSpecWithTemplate: { 2508 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2509 return NestedNameSpecifier::Create(*this, 0, 2510 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2511 T.getTypePtr()); 2512 } 2513 2514 case NestedNameSpecifier::Global: 2515 // The global specifier is canonical and unique. 2516 return NNS; 2517 } 2518 2519 // Required to silence a GCC warning 2520 return 0; 2521} 2522 2523 2524const ArrayType *ASTContext::getAsArrayType(QualType T) { 2525 // Handle the non-qualified case efficiently. 2526 if (!T.hasLocalQualifiers()) { 2527 // Handle the common positive case fast. 2528 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2529 return AT; 2530 } 2531 2532 // Handle the common negative case fast. 2533 QualType CType = T->getCanonicalTypeInternal(); 2534 if (!isa<ArrayType>(CType)) 2535 return 0; 2536 2537 // Apply any qualifiers from the array type to the element type. This 2538 // implements C99 6.7.3p8: "If the specification of an array type includes 2539 // any type qualifiers, the element type is so qualified, not the array type." 2540 2541 // If we get here, we either have type qualifiers on the type, or we have 2542 // sugar such as a typedef in the way. If we have type qualifiers on the type 2543 // we must propagate them down into the element type. 2544 2545 QualifierCollector Qs; 2546 const Type *Ty = Qs.strip(T.getDesugaredType()); 2547 2548 // If we have a simple case, just return now. 2549 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2550 if (ATy == 0 || Qs.empty()) 2551 return ATy; 2552 2553 // Otherwise, we have an array and we have qualifiers on it. Push the 2554 // qualifiers into the array element type and return a new array type. 2555 // Get the canonical version of the element with the extra qualifiers on it. 2556 // This can recursively sink qualifiers through multiple levels of arrays. 2557 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2558 2559 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2560 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2561 CAT->getSizeModifier(), 2562 CAT->getIndexTypeCVRQualifiers())); 2563 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2564 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2565 IAT->getSizeModifier(), 2566 IAT->getIndexTypeCVRQualifiers())); 2567 2568 if (const DependentSizedArrayType *DSAT 2569 = dyn_cast<DependentSizedArrayType>(ATy)) 2570 return cast<ArrayType>( 2571 getDependentSizedArrayType(NewEltTy, 2572 DSAT->getSizeExpr() ? 2573 DSAT->getSizeExpr()->Retain() : 0, 2574 DSAT->getSizeModifier(), 2575 DSAT->getIndexTypeCVRQualifiers(), 2576 DSAT->getBracketsRange())); 2577 2578 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2579 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2580 VAT->getSizeExpr() ? 2581 VAT->getSizeExpr()->Retain() : 0, 2582 VAT->getSizeModifier(), 2583 VAT->getIndexTypeCVRQualifiers(), 2584 VAT->getBracketsRange())); 2585} 2586 2587 2588/// getArrayDecayedType - Return the properly qualified result of decaying the 2589/// specified array type to a pointer. This operation is non-trivial when 2590/// handling typedefs etc. The canonical type of "T" must be an array type, 2591/// this returns a pointer to a properly qualified element of the array. 2592/// 2593/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2594QualType ASTContext::getArrayDecayedType(QualType Ty) { 2595 // Get the element type with 'getAsArrayType' so that we don't lose any 2596 // typedefs in the element type of the array. This also handles propagation 2597 // of type qualifiers from the array type into the element type if present 2598 // (C99 6.7.3p8). 2599 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2600 assert(PrettyArrayType && "Not an array type!"); 2601 2602 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2603 2604 // int x[restrict 4] -> int *restrict 2605 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2606} 2607 2608QualType ASTContext::getBaseElementType(QualType QT) { 2609 QualifierCollector Qs; 2610 while (const ArrayType *AT = getAsArrayType(QualType(Qs.strip(QT), 0))) 2611 QT = AT->getElementType(); 2612 return Qs.apply(QT); 2613} 2614 2615QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2616 QualType ElemTy = AT->getElementType(); 2617 2618 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2619 return getBaseElementType(AT); 2620 2621 return ElemTy; 2622} 2623 2624/// getConstantArrayElementCount - Returns number of constant array elements. 2625uint64_t 2626ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2627 uint64_t ElementCount = 1; 2628 do { 2629 ElementCount *= CA->getSize().getZExtValue(); 2630 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2631 } while (CA); 2632 return ElementCount; 2633} 2634 2635/// getFloatingRank - Return a relative rank for floating point types. 2636/// This routine will assert if passed a built-in type that isn't a float. 2637static FloatingRank getFloatingRank(QualType T) { 2638 if (const ComplexType *CT = T->getAs<ComplexType>()) 2639 return getFloatingRank(CT->getElementType()); 2640 2641 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2642 switch (T->getAs<BuiltinType>()->getKind()) { 2643 default: assert(0 && "getFloatingRank(): not a floating type"); 2644 case BuiltinType::Float: return FloatRank; 2645 case BuiltinType::Double: return DoubleRank; 2646 case BuiltinType::LongDouble: return LongDoubleRank; 2647 } 2648} 2649 2650/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2651/// point or a complex type (based on typeDomain/typeSize). 2652/// 'typeDomain' is a real floating point or complex type. 2653/// 'typeSize' is a real floating point or complex type. 2654QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2655 QualType Domain) const { 2656 FloatingRank EltRank = getFloatingRank(Size); 2657 if (Domain->isComplexType()) { 2658 switch (EltRank) { 2659 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2660 case FloatRank: return FloatComplexTy; 2661 case DoubleRank: return DoubleComplexTy; 2662 case LongDoubleRank: return LongDoubleComplexTy; 2663 } 2664 } 2665 2666 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2667 switch (EltRank) { 2668 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2669 case FloatRank: return FloatTy; 2670 case DoubleRank: return DoubleTy; 2671 case LongDoubleRank: return LongDoubleTy; 2672 } 2673} 2674 2675/// getFloatingTypeOrder - Compare the rank of the two specified floating 2676/// point types, ignoring the domain of the type (i.e. 'double' == 2677/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2678/// LHS < RHS, return -1. 2679int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2680 FloatingRank LHSR = getFloatingRank(LHS); 2681 FloatingRank RHSR = getFloatingRank(RHS); 2682 2683 if (LHSR == RHSR) 2684 return 0; 2685 if (LHSR > RHSR) 2686 return 1; 2687 return -1; 2688} 2689 2690/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2691/// routine will assert if passed a built-in type that isn't an integer or enum, 2692/// or if it is not canonicalized. 2693unsigned ASTContext::getIntegerRank(Type *T) { 2694 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2695 if (EnumType* ET = dyn_cast<EnumType>(T)) 2696 T = ET->getDecl()->getPromotionType().getTypePtr(); 2697 2698 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2699 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2700 2701 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2702 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2703 2704 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2705 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2706 2707 switch (cast<BuiltinType>(T)->getKind()) { 2708 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2709 case BuiltinType::Bool: 2710 return 1 + (getIntWidth(BoolTy) << 3); 2711 case BuiltinType::Char_S: 2712 case BuiltinType::Char_U: 2713 case BuiltinType::SChar: 2714 case BuiltinType::UChar: 2715 return 2 + (getIntWidth(CharTy) << 3); 2716 case BuiltinType::Short: 2717 case BuiltinType::UShort: 2718 return 3 + (getIntWidth(ShortTy) << 3); 2719 case BuiltinType::Int: 2720 case BuiltinType::UInt: 2721 return 4 + (getIntWidth(IntTy) << 3); 2722 case BuiltinType::Long: 2723 case BuiltinType::ULong: 2724 return 5 + (getIntWidth(LongTy) << 3); 2725 case BuiltinType::LongLong: 2726 case BuiltinType::ULongLong: 2727 return 6 + (getIntWidth(LongLongTy) << 3); 2728 case BuiltinType::Int128: 2729 case BuiltinType::UInt128: 2730 return 7 + (getIntWidth(Int128Ty) << 3); 2731 } 2732} 2733 2734/// \brief Whether this is a promotable bitfield reference according 2735/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 2736/// 2737/// \returns the type this bit-field will promote to, or NULL if no 2738/// promotion occurs. 2739QualType ASTContext::isPromotableBitField(Expr *E) { 2740 if (E->isTypeDependent() || E->isValueDependent()) 2741 return QualType(); 2742 2743 FieldDecl *Field = E->getBitField(); 2744 if (!Field) 2745 return QualType(); 2746 2747 QualType FT = Field->getType(); 2748 2749 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 2750 uint64_t BitWidth = BitWidthAP.getZExtValue(); 2751 uint64_t IntSize = getTypeSize(IntTy); 2752 // GCC extension compatibility: if the bit-field size is less than or equal 2753 // to the size of int, it gets promoted no matter what its type is. 2754 // For instance, unsigned long bf : 4 gets promoted to signed int. 2755 if (BitWidth < IntSize) 2756 return IntTy; 2757 2758 if (BitWidth == IntSize) 2759 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 2760 2761 // Types bigger than int are not subject to promotions, and therefore act 2762 // like the base type. 2763 // FIXME: This doesn't quite match what gcc does, but what gcc does here 2764 // is ridiculous. 2765 return QualType(); 2766} 2767 2768/// getPromotedIntegerType - Returns the type that Promotable will 2769/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 2770/// integer type. 2771QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 2772 assert(!Promotable.isNull()); 2773 assert(Promotable->isPromotableIntegerType()); 2774 if (const EnumType *ET = Promotable->getAs<EnumType>()) 2775 return ET->getDecl()->getPromotionType(); 2776 if (Promotable->isSignedIntegerType()) 2777 return IntTy; 2778 uint64_t PromotableSize = getTypeSize(Promotable); 2779 uint64_t IntSize = getTypeSize(IntTy); 2780 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 2781 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 2782} 2783 2784/// getIntegerTypeOrder - Returns the highest ranked integer type: 2785/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2786/// LHS < RHS, return -1. 2787int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2788 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2789 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2790 if (LHSC == RHSC) return 0; 2791 2792 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2793 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2794 2795 unsigned LHSRank = getIntegerRank(LHSC); 2796 unsigned RHSRank = getIntegerRank(RHSC); 2797 2798 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2799 if (LHSRank == RHSRank) return 0; 2800 return LHSRank > RHSRank ? 1 : -1; 2801 } 2802 2803 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2804 if (LHSUnsigned) { 2805 // If the unsigned [LHS] type is larger, return it. 2806 if (LHSRank >= RHSRank) 2807 return 1; 2808 2809 // If the signed type can represent all values of the unsigned type, it 2810 // wins. Because we are dealing with 2's complement and types that are 2811 // powers of two larger than each other, this is always safe. 2812 return -1; 2813 } 2814 2815 // If the unsigned [RHS] type is larger, return it. 2816 if (RHSRank >= LHSRank) 2817 return -1; 2818 2819 // If the signed type can represent all values of the unsigned type, it 2820 // wins. Because we are dealing with 2's complement and types that are 2821 // powers of two larger than each other, this is always safe. 2822 return 1; 2823} 2824 2825static RecordDecl * 2826CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 2827 SourceLocation L, IdentifierInfo *Id) { 2828 if (Ctx.getLangOptions().CPlusPlus) 2829 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 2830 else 2831 return RecordDecl::Create(Ctx, TK, DC, L, Id); 2832} 2833 2834// getCFConstantStringType - Return the type used for constant CFStrings. 2835QualType ASTContext::getCFConstantStringType() { 2836 if (!CFConstantStringTypeDecl) { 2837 CFConstantStringTypeDecl = 2838 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2839 &Idents.get("NSConstantString")); 2840 CFConstantStringTypeDecl->startDefinition(); 2841 2842 QualType FieldTypes[4]; 2843 2844 // const int *isa; 2845 FieldTypes[0] = getPointerType(IntTy.withConst()); 2846 // int flags; 2847 FieldTypes[1] = IntTy; 2848 // const char *str; 2849 FieldTypes[2] = getPointerType(CharTy.withConst()); 2850 // long length; 2851 FieldTypes[3] = LongTy; 2852 2853 // Create fields 2854 for (unsigned i = 0; i < 4; ++i) { 2855 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2856 SourceLocation(), 0, 2857 FieldTypes[i], /*TInfo=*/0, 2858 /*BitWidth=*/0, 2859 /*Mutable=*/false); 2860 Field->setAccess(AS_public); 2861 CFConstantStringTypeDecl->addDecl(Field); 2862 } 2863 2864 CFConstantStringTypeDecl->completeDefinition(); 2865 } 2866 2867 return getTagDeclType(CFConstantStringTypeDecl); 2868} 2869 2870void ASTContext::setCFConstantStringType(QualType T) { 2871 const RecordType *Rec = T->getAs<RecordType>(); 2872 assert(Rec && "Invalid CFConstantStringType"); 2873 CFConstantStringTypeDecl = Rec->getDecl(); 2874} 2875 2876// getNSConstantStringType - Return the type used for constant NSStrings. 2877QualType ASTContext::getNSConstantStringType() { 2878 if (!NSConstantStringTypeDecl) { 2879 NSConstantStringTypeDecl = 2880 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2881 &Idents.get("__builtin_NSString")); 2882 NSConstantStringTypeDecl->startDefinition(); 2883 2884 QualType FieldTypes[3]; 2885 2886 // const int *isa; 2887 FieldTypes[0] = getPointerType(IntTy.withConst()); 2888 // const char *str; 2889 FieldTypes[1] = getPointerType(CharTy.withConst()); 2890 // unsigned int length; 2891 FieldTypes[2] = UnsignedIntTy; 2892 2893 // Create fields 2894 for (unsigned i = 0; i < 3; ++i) { 2895 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 2896 SourceLocation(), 0, 2897 FieldTypes[i], /*TInfo=*/0, 2898 /*BitWidth=*/0, 2899 /*Mutable=*/false); 2900 Field->setAccess(AS_public); 2901 NSConstantStringTypeDecl->addDecl(Field); 2902 } 2903 2904 NSConstantStringTypeDecl->completeDefinition(); 2905 } 2906 2907 return getTagDeclType(NSConstantStringTypeDecl); 2908} 2909 2910void ASTContext::setNSConstantStringType(QualType T) { 2911 const RecordType *Rec = T->getAs<RecordType>(); 2912 assert(Rec && "Invalid NSConstantStringType"); 2913 NSConstantStringTypeDecl = Rec->getDecl(); 2914} 2915 2916QualType ASTContext::getObjCFastEnumerationStateType() { 2917 if (!ObjCFastEnumerationStateTypeDecl) { 2918 ObjCFastEnumerationStateTypeDecl = 2919 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2920 &Idents.get("__objcFastEnumerationState")); 2921 ObjCFastEnumerationStateTypeDecl->startDefinition(); 2922 2923 QualType FieldTypes[] = { 2924 UnsignedLongTy, 2925 getPointerType(ObjCIdTypedefType), 2926 getPointerType(UnsignedLongTy), 2927 getConstantArrayType(UnsignedLongTy, 2928 llvm::APInt(32, 5), ArrayType::Normal, 0) 2929 }; 2930 2931 for (size_t i = 0; i < 4; ++i) { 2932 FieldDecl *Field = FieldDecl::Create(*this, 2933 ObjCFastEnumerationStateTypeDecl, 2934 SourceLocation(), 0, 2935 FieldTypes[i], /*TInfo=*/0, 2936 /*BitWidth=*/0, 2937 /*Mutable=*/false); 2938 Field->setAccess(AS_public); 2939 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 2940 } 2941 if (getLangOptions().CPlusPlus) 2942 if (CXXRecordDecl *CXXRD = 2943 dyn_cast<CXXRecordDecl>(ObjCFastEnumerationStateTypeDecl)) 2944 CXXRD->setEmpty(false); 2945 2946 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 2947 } 2948 2949 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 2950} 2951 2952QualType ASTContext::getBlockDescriptorType() { 2953 if (BlockDescriptorType) 2954 return getTagDeclType(BlockDescriptorType); 2955 2956 RecordDecl *T; 2957 // FIXME: Needs the FlagAppleBlock bit. 2958 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2959 &Idents.get("__block_descriptor")); 2960 T->startDefinition(); 2961 2962 QualType FieldTypes[] = { 2963 UnsignedLongTy, 2964 UnsignedLongTy, 2965 }; 2966 2967 const char *FieldNames[] = { 2968 "reserved", 2969 "Size" 2970 }; 2971 2972 for (size_t i = 0; i < 2; ++i) { 2973 FieldDecl *Field = FieldDecl::Create(*this, 2974 T, 2975 SourceLocation(), 2976 &Idents.get(FieldNames[i]), 2977 FieldTypes[i], /*TInfo=*/0, 2978 /*BitWidth=*/0, 2979 /*Mutable=*/false); 2980 Field->setAccess(AS_public); 2981 T->addDecl(Field); 2982 } 2983 2984 T->completeDefinition(); 2985 2986 BlockDescriptorType = T; 2987 2988 return getTagDeclType(BlockDescriptorType); 2989} 2990 2991void ASTContext::setBlockDescriptorType(QualType T) { 2992 const RecordType *Rec = T->getAs<RecordType>(); 2993 assert(Rec && "Invalid BlockDescriptorType"); 2994 BlockDescriptorType = Rec->getDecl(); 2995} 2996 2997QualType ASTContext::getBlockDescriptorExtendedType() { 2998 if (BlockDescriptorExtendedType) 2999 return getTagDeclType(BlockDescriptorExtendedType); 3000 3001 RecordDecl *T; 3002 // FIXME: Needs the FlagAppleBlock bit. 3003 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3004 &Idents.get("__block_descriptor_withcopydispose")); 3005 T->startDefinition(); 3006 3007 QualType FieldTypes[] = { 3008 UnsignedLongTy, 3009 UnsignedLongTy, 3010 getPointerType(VoidPtrTy), 3011 getPointerType(VoidPtrTy) 3012 }; 3013 3014 const char *FieldNames[] = { 3015 "reserved", 3016 "Size", 3017 "CopyFuncPtr", 3018 "DestroyFuncPtr" 3019 }; 3020 3021 for (size_t i = 0; i < 4; ++i) { 3022 FieldDecl *Field = FieldDecl::Create(*this, 3023 T, 3024 SourceLocation(), 3025 &Idents.get(FieldNames[i]), 3026 FieldTypes[i], /*TInfo=*/0, 3027 /*BitWidth=*/0, 3028 /*Mutable=*/false); 3029 Field->setAccess(AS_public); 3030 T->addDecl(Field); 3031 } 3032 3033 T->completeDefinition(); 3034 3035 BlockDescriptorExtendedType = T; 3036 3037 return getTagDeclType(BlockDescriptorExtendedType); 3038} 3039 3040void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3041 const RecordType *Rec = T->getAs<RecordType>(); 3042 assert(Rec && "Invalid BlockDescriptorType"); 3043 BlockDescriptorExtendedType = Rec->getDecl(); 3044} 3045 3046bool ASTContext::BlockRequiresCopying(QualType Ty) { 3047 if (Ty->isBlockPointerType()) 3048 return true; 3049 if (isObjCNSObjectType(Ty)) 3050 return true; 3051 if (Ty->isObjCObjectPointerType()) 3052 return true; 3053 return false; 3054} 3055 3056QualType ASTContext::BuildByRefType(const char *DeclName, QualType Ty) { 3057 // type = struct __Block_byref_1_X { 3058 // void *__isa; 3059 // struct __Block_byref_1_X *__forwarding; 3060 // unsigned int __flags; 3061 // unsigned int __size; 3062 // void *__copy_helper; // as needed 3063 // void *__destroy_help // as needed 3064 // int X; 3065 // } * 3066 3067 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3068 3069 // FIXME: Move up 3070 static unsigned int UniqueBlockByRefTypeID = 0; 3071 llvm::SmallString<36> Name; 3072 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3073 ++UniqueBlockByRefTypeID << '_' << DeclName; 3074 RecordDecl *T; 3075 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3076 &Idents.get(Name.str())); 3077 T->startDefinition(); 3078 QualType Int32Ty = IntTy; 3079 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3080 QualType FieldTypes[] = { 3081 getPointerType(VoidPtrTy), 3082 getPointerType(getTagDeclType(T)), 3083 Int32Ty, 3084 Int32Ty, 3085 getPointerType(VoidPtrTy), 3086 getPointerType(VoidPtrTy), 3087 Ty 3088 }; 3089 3090 const char *FieldNames[] = { 3091 "__isa", 3092 "__forwarding", 3093 "__flags", 3094 "__size", 3095 "__copy_helper", 3096 "__destroy_helper", 3097 DeclName, 3098 }; 3099 3100 for (size_t i = 0; i < 7; ++i) { 3101 if (!HasCopyAndDispose && i >=4 && i <= 5) 3102 continue; 3103 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3104 &Idents.get(FieldNames[i]), 3105 FieldTypes[i], /*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 3116 3117QualType ASTContext::getBlockParmType( 3118 bool BlockHasCopyDispose, 3119 llvm::SmallVectorImpl<const Expr *> &Layout) { 3120 3121 // FIXME: Move up 3122 static unsigned int UniqueBlockParmTypeID = 0; 3123 llvm::SmallString<36> Name; 3124 llvm::raw_svector_ostream(Name) << "__block_literal_" 3125 << ++UniqueBlockParmTypeID; 3126 RecordDecl *T; 3127 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3128 &Idents.get(Name.str())); 3129 T->startDefinition(); 3130 QualType FieldTypes[] = { 3131 getPointerType(VoidPtrTy), 3132 IntTy, 3133 IntTy, 3134 getPointerType(VoidPtrTy), 3135 (BlockHasCopyDispose ? 3136 getPointerType(getBlockDescriptorExtendedType()) : 3137 getPointerType(getBlockDescriptorType())) 3138 }; 3139 3140 const char *FieldNames[] = { 3141 "__isa", 3142 "__flags", 3143 "__reserved", 3144 "__FuncPtr", 3145 "__descriptor" 3146 }; 3147 3148 for (size_t i = 0; i < 5; ++i) { 3149 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3150 &Idents.get(FieldNames[i]), 3151 FieldTypes[i], /*TInfo=*/0, 3152 /*BitWidth=*/0, /*Mutable=*/false); 3153 Field->setAccess(AS_public); 3154 T->addDecl(Field); 3155 } 3156 3157 for (unsigned i = 0; i < Layout.size(); ++i) { 3158 const Expr *E = Layout[i]; 3159 3160 QualType FieldType = E->getType(); 3161 IdentifierInfo *FieldName = 0; 3162 if (isa<CXXThisExpr>(E)) { 3163 FieldName = &Idents.get("this"); 3164 } else if (const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E)) { 3165 const ValueDecl *D = BDRE->getDecl(); 3166 FieldName = D->getIdentifier(); 3167 if (BDRE->isByRef()) 3168 FieldType = BuildByRefType(D->getNameAsCString(), FieldType); 3169 } else { 3170 // Padding. 3171 assert(isa<ConstantArrayType>(FieldType) && 3172 isa<DeclRefExpr>(E) && 3173 !cast<DeclRefExpr>(E)->getDecl()->getDeclName() && 3174 "doesn't match characteristics of padding decl"); 3175 } 3176 3177 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3178 FieldName, FieldType, /*TInfo=*/0, 3179 /*BitWidth=*/0, /*Mutable=*/false); 3180 Field->setAccess(AS_public); 3181 T->addDecl(Field); 3182 } 3183 3184 T->completeDefinition(); 3185 3186 return getPointerType(getTagDeclType(T)); 3187} 3188 3189void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3190 const RecordType *Rec = T->getAs<RecordType>(); 3191 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3192 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3193} 3194 3195// This returns true if a type has been typedefed to BOOL: 3196// typedef <type> BOOL; 3197static bool isTypeTypedefedAsBOOL(QualType T) { 3198 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3199 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3200 return II->isStr("BOOL"); 3201 3202 return false; 3203} 3204 3205/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3206/// purpose. 3207CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) { 3208 CharUnits sz = getTypeSizeInChars(type); 3209 3210 // Make all integer and enum types at least as large as an int 3211 if (sz.isPositive() && type->isIntegralType()) 3212 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3213 // Treat arrays as pointers, since that's how they're passed in. 3214 else if (type->isArrayType()) 3215 sz = getTypeSizeInChars(VoidPtrTy); 3216 return sz; 3217} 3218 3219static inline 3220std::string charUnitsToString(const CharUnits &CU) { 3221 return llvm::itostr(CU.getQuantity()); 3222} 3223 3224/// getObjCEncodingForBlockDecl - Return the encoded type for this block 3225/// declaration. 3226void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3227 std::string& S) { 3228 const BlockDecl *Decl = Expr->getBlockDecl(); 3229 QualType BlockTy = 3230 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3231 // Encode result type. 3232 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3233 // Compute size of all parameters. 3234 // Start with computing size of a pointer in number of bytes. 3235 // FIXME: There might(should) be a better way of doing this computation! 3236 SourceLocation Loc; 3237 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3238 CharUnits ParmOffset = PtrSize; 3239 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3240 E = Decl->param_end(); PI != E; ++PI) { 3241 QualType PType = (*PI)->getType(); 3242 CharUnits sz = getObjCEncodingTypeSize(PType); 3243 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3244 ParmOffset += sz; 3245 } 3246 // Size of the argument frame 3247 S += charUnitsToString(ParmOffset); 3248 // Block pointer and offset. 3249 S += "@?0"; 3250 ParmOffset = PtrSize; 3251 3252 // Argument types. 3253 ParmOffset = PtrSize; 3254 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3255 Decl->param_end(); PI != E; ++PI) { 3256 ParmVarDecl *PVDecl = *PI; 3257 QualType PType = PVDecl->getOriginalType(); 3258 if (const ArrayType *AT = 3259 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3260 // Use array's original type only if it has known number of 3261 // elements. 3262 if (!isa<ConstantArrayType>(AT)) 3263 PType = PVDecl->getType(); 3264 } else if (PType->isFunctionType()) 3265 PType = PVDecl->getType(); 3266 getObjCEncodingForType(PType, S); 3267 S += charUnitsToString(ParmOffset); 3268 ParmOffset += getObjCEncodingTypeSize(PType); 3269 } 3270} 3271 3272/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3273/// declaration. 3274void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3275 std::string& S) { 3276 // FIXME: This is not very efficient. 3277 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3278 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3279 // Encode result type. 3280 getObjCEncodingForType(Decl->getResultType(), S); 3281 // Compute size of all parameters. 3282 // Start with computing size of a pointer in number of bytes. 3283 // FIXME: There might(should) be a better way of doing this computation! 3284 SourceLocation Loc; 3285 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3286 // The first two arguments (self and _cmd) are pointers; account for 3287 // their size. 3288 CharUnits ParmOffset = 2 * PtrSize; 3289 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3290 E = Decl->sel_param_end(); PI != E; ++PI) { 3291 QualType PType = (*PI)->getType(); 3292 CharUnits sz = getObjCEncodingTypeSize(PType); 3293 assert (sz.isPositive() && 3294 "getObjCEncodingForMethodDecl - Incomplete param type"); 3295 ParmOffset += sz; 3296 } 3297 S += charUnitsToString(ParmOffset); 3298 S += "@0:"; 3299 S += charUnitsToString(PtrSize); 3300 3301 // Argument types. 3302 ParmOffset = 2 * PtrSize; 3303 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3304 E = Decl->sel_param_end(); PI != E; ++PI) { 3305 ParmVarDecl *PVDecl = *PI; 3306 QualType PType = PVDecl->getOriginalType(); 3307 if (const ArrayType *AT = 3308 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3309 // Use array's original type only if it has known number of 3310 // elements. 3311 if (!isa<ConstantArrayType>(AT)) 3312 PType = PVDecl->getType(); 3313 } else if (PType->isFunctionType()) 3314 PType = PVDecl->getType(); 3315 // Process argument qualifiers for user supplied arguments; such as, 3316 // 'in', 'inout', etc. 3317 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3318 getObjCEncodingForType(PType, S); 3319 S += charUnitsToString(ParmOffset); 3320 ParmOffset += getObjCEncodingTypeSize(PType); 3321 } 3322} 3323 3324/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3325/// property declaration. If non-NULL, Container must be either an 3326/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3327/// NULL when getting encodings for protocol properties. 3328/// Property attributes are stored as a comma-delimited C string. The simple 3329/// attributes readonly and bycopy are encoded as single characters. The 3330/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3331/// encoded as single characters, followed by an identifier. Property types 3332/// are also encoded as a parametrized attribute. The characters used to encode 3333/// these attributes are defined by the following enumeration: 3334/// @code 3335/// enum PropertyAttributes { 3336/// kPropertyReadOnly = 'R', // property is read-only. 3337/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3338/// kPropertyByref = '&', // property is a reference to the value last assigned 3339/// kPropertyDynamic = 'D', // property is dynamic 3340/// kPropertyGetter = 'G', // followed by getter selector name 3341/// kPropertySetter = 'S', // followed by setter selector name 3342/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3343/// kPropertyType = 't' // followed by old-style type encoding. 3344/// kPropertyWeak = 'W' // 'weak' property 3345/// kPropertyStrong = 'P' // property GC'able 3346/// kPropertyNonAtomic = 'N' // property non-atomic 3347/// }; 3348/// @endcode 3349void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3350 const Decl *Container, 3351 std::string& S) { 3352 // Collect information from the property implementation decl(s). 3353 bool Dynamic = false; 3354 ObjCPropertyImplDecl *SynthesizePID = 0; 3355 3356 // FIXME: Duplicated code due to poor abstraction. 3357 if (Container) { 3358 if (const ObjCCategoryImplDecl *CID = 3359 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3360 for (ObjCCategoryImplDecl::propimpl_iterator 3361 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3362 i != e; ++i) { 3363 ObjCPropertyImplDecl *PID = *i; 3364 if (PID->getPropertyDecl() == PD) { 3365 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3366 Dynamic = true; 3367 } else { 3368 SynthesizePID = PID; 3369 } 3370 } 3371 } 3372 } else { 3373 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3374 for (ObjCCategoryImplDecl::propimpl_iterator 3375 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3376 i != e; ++i) { 3377 ObjCPropertyImplDecl *PID = *i; 3378 if (PID->getPropertyDecl() == PD) { 3379 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3380 Dynamic = true; 3381 } else { 3382 SynthesizePID = PID; 3383 } 3384 } 3385 } 3386 } 3387 } 3388 3389 // FIXME: This is not very efficient. 3390 S = "T"; 3391 3392 // Encode result type. 3393 // GCC has some special rules regarding encoding of properties which 3394 // closely resembles encoding of ivars. 3395 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3396 true /* outermost type */, 3397 true /* encoding for property */); 3398 3399 if (PD->isReadOnly()) { 3400 S += ",R"; 3401 } else { 3402 switch (PD->getSetterKind()) { 3403 case ObjCPropertyDecl::Assign: break; 3404 case ObjCPropertyDecl::Copy: S += ",C"; break; 3405 case ObjCPropertyDecl::Retain: S += ",&"; break; 3406 } 3407 } 3408 3409 // It really isn't clear at all what this means, since properties 3410 // are "dynamic by default". 3411 if (Dynamic) 3412 S += ",D"; 3413 3414 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3415 S += ",N"; 3416 3417 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3418 S += ",G"; 3419 S += PD->getGetterName().getAsString(); 3420 } 3421 3422 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3423 S += ",S"; 3424 S += PD->getSetterName().getAsString(); 3425 } 3426 3427 if (SynthesizePID) { 3428 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3429 S += ",V"; 3430 S += OID->getNameAsString(); 3431 } 3432 3433 // FIXME: OBJCGC: weak & strong 3434} 3435 3436/// getLegacyIntegralTypeEncoding - 3437/// Another legacy compatibility encoding: 32-bit longs are encoded as 3438/// 'l' or 'L' , but not always. For typedefs, we need to use 3439/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3440/// 3441void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3442 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3443 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3444 if (BT->getKind() == BuiltinType::ULong && 3445 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3446 PointeeTy = UnsignedIntTy; 3447 else 3448 if (BT->getKind() == BuiltinType::Long && 3449 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3450 PointeeTy = IntTy; 3451 } 3452 } 3453} 3454 3455void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3456 const FieldDecl *Field) { 3457 // We follow the behavior of gcc, expanding structures which are 3458 // directly pointed to, and expanding embedded structures. Note that 3459 // these rules are sufficient to prevent recursive encoding of the 3460 // same type. 3461 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3462 true /* outermost type */); 3463} 3464 3465static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 3466 switch (T->getAs<BuiltinType>()->getKind()) { 3467 default: assert(0 && "Unhandled builtin type kind"); 3468 case BuiltinType::Void: return 'v'; 3469 case BuiltinType::Bool: return 'B'; 3470 case BuiltinType::Char_U: 3471 case BuiltinType::UChar: return 'C'; 3472 case BuiltinType::UShort: return 'S'; 3473 case BuiltinType::UInt: return 'I'; 3474 case BuiltinType::ULong: 3475 return 3476 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3477 case BuiltinType::UInt128: return 'T'; 3478 case BuiltinType::ULongLong: return 'Q'; 3479 case BuiltinType::Char_S: 3480 case BuiltinType::SChar: return 'c'; 3481 case BuiltinType::Short: return 's'; 3482 case BuiltinType::WChar: 3483 case BuiltinType::Int: return 'i'; 3484 case BuiltinType::Long: 3485 return 3486 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'l' : 'q'; 3487 case BuiltinType::LongLong: return 'q'; 3488 case BuiltinType::Int128: return 't'; 3489 case BuiltinType::Float: return 'f'; 3490 case BuiltinType::Double: return 'd'; 3491 case BuiltinType::LongDouble: return 'd'; 3492 } 3493} 3494 3495static void EncodeBitField(const ASTContext *Context, std::string& S, 3496 QualType T, const FieldDecl *FD) { 3497 const Expr *E = FD->getBitWidth(); 3498 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3499 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3500 S += 'b'; 3501 // The NeXT runtime encodes bit fields as b followed by the number of bits. 3502 // The GNU runtime requires more information; bitfields are encoded as b, 3503 // then the offset (in bits) of the first element, then the type of the 3504 // bitfield, then the size in bits. For example, in this structure: 3505 // 3506 // struct 3507 // { 3508 // int integer; 3509 // int flags:2; 3510 // }; 3511 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 3512 // runtime, but b32i2 for the GNU runtime. The reason for this extra 3513 // information is not especially sensible, but we're stuck with it for 3514 // compatibility with GCC, although providing it breaks anything that 3515 // actually uses runtime introspection and wants to work on both runtimes... 3516 if (!Ctx->getLangOptions().NeXTRuntime) { 3517 const RecordDecl *RD = FD->getParent(); 3518 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 3519 // FIXME: This same linear search is also used in ExprConstant - it might 3520 // be better if the FieldDecl stored its offset. We'd be increasing the 3521 // size of the object slightly, but saving some time every time it is used. 3522 unsigned i = 0; 3523 for (RecordDecl::field_iterator Field = RD->field_begin(), 3524 FieldEnd = RD->field_end(); 3525 Field != FieldEnd; (void)++Field, ++i) { 3526 if (*Field == FD) 3527 break; 3528 } 3529 S += llvm::utostr(RL.getFieldOffset(i)); 3530 S += ObjCEncodingForPrimitiveKind(Context, T); 3531 } 3532 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3533 S += llvm::utostr(N); 3534} 3535 3536// FIXME: Use SmallString for accumulating string. 3537void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3538 bool ExpandPointedToStructures, 3539 bool ExpandStructures, 3540 const FieldDecl *FD, 3541 bool OutermostType, 3542 bool EncodingProperty) { 3543 if (T->getAs<BuiltinType>()) { 3544 if (FD && FD->isBitField()) 3545 return EncodeBitField(this, S, T, FD); 3546 S += ObjCEncodingForPrimitiveKind(this, T); 3547 return; 3548 } 3549 3550 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3551 S += 'j'; 3552 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3553 false); 3554 return; 3555 } 3556 3557 // encoding for pointer or r3eference types. 3558 QualType PointeeTy; 3559 if (const PointerType *PT = T->getAs<PointerType>()) { 3560 if (PT->isObjCSelType()) { 3561 S += ':'; 3562 return; 3563 } 3564 PointeeTy = PT->getPointeeType(); 3565 } 3566 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3567 PointeeTy = RT->getPointeeType(); 3568 if (!PointeeTy.isNull()) { 3569 bool isReadOnly = false; 3570 // For historical/compatibility reasons, the read-only qualifier of the 3571 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3572 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3573 // Also, do not emit the 'r' for anything but the outermost type! 3574 if (isa<TypedefType>(T.getTypePtr())) { 3575 if (OutermostType && T.isConstQualified()) { 3576 isReadOnly = true; 3577 S += 'r'; 3578 } 3579 } else if (OutermostType) { 3580 QualType P = PointeeTy; 3581 while (P->getAs<PointerType>()) 3582 P = P->getAs<PointerType>()->getPointeeType(); 3583 if (P.isConstQualified()) { 3584 isReadOnly = true; 3585 S += 'r'; 3586 } 3587 } 3588 if (isReadOnly) { 3589 // Another legacy compatibility encoding. Some ObjC qualifier and type 3590 // combinations need to be rearranged. 3591 // Rewrite "in const" from "nr" to "rn" 3592 if (llvm::StringRef(S).endswith("nr")) 3593 S.replace(S.end()-2, S.end(), "rn"); 3594 } 3595 3596 if (PointeeTy->isCharType()) { 3597 // char pointer types should be encoded as '*' unless it is a 3598 // type that has been typedef'd to 'BOOL'. 3599 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3600 S += '*'; 3601 return; 3602 } 3603 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3604 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3605 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3606 S += '#'; 3607 return; 3608 } 3609 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3610 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3611 S += '@'; 3612 return; 3613 } 3614 // fall through... 3615 } 3616 S += '^'; 3617 getLegacyIntegralTypeEncoding(PointeeTy); 3618 3619 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3620 NULL); 3621 return; 3622 } 3623 3624 if (const ArrayType *AT = 3625 // Ignore type qualifiers etc. 3626 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3627 if (isa<IncompleteArrayType>(AT)) { 3628 // Incomplete arrays are encoded as a pointer to the array element. 3629 S += '^'; 3630 3631 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3632 false, ExpandStructures, FD); 3633 } else { 3634 S += '['; 3635 3636 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3637 S += llvm::utostr(CAT->getSize().getZExtValue()); 3638 else { 3639 //Variable length arrays are encoded as a regular array with 0 elements. 3640 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3641 S += '0'; 3642 } 3643 3644 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3645 false, ExpandStructures, FD); 3646 S += ']'; 3647 } 3648 return; 3649 } 3650 3651 if (T->getAs<FunctionType>()) { 3652 S += '?'; 3653 return; 3654 } 3655 3656 if (const RecordType *RTy = T->getAs<RecordType>()) { 3657 RecordDecl *RDecl = RTy->getDecl(); 3658 S += RDecl->isUnion() ? '(' : '{'; 3659 // Anonymous structures print as '?' 3660 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3661 S += II->getName(); 3662 if (ClassTemplateSpecializationDecl *Spec 3663 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 3664 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 3665 std::string TemplateArgsStr 3666 = TemplateSpecializationType::PrintTemplateArgumentList( 3667 TemplateArgs.getFlatArgumentList(), 3668 TemplateArgs.flat_size(), 3669 (*this).PrintingPolicy); 3670 3671 S += TemplateArgsStr; 3672 } 3673 } else { 3674 S += '?'; 3675 } 3676 if (ExpandStructures) { 3677 S += '='; 3678 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3679 FieldEnd = RDecl->field_end(); 3680 Field != FieldEnd; ++Field) { 3681 if (FD) { 3682 S += '"'; 3683 S += Field->getNameAsString(); 3684 S += '"'; 3685 } 3686 3687 // Special case bit-fields. 3688 if (Field->isBitField()) { 3689 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3690 (*Field)); 3691 } else { 3692 QualType qt = Field->getType(); 3693 getLegacyIntegralTypeEncoding(qt); 3694 getObjCEncodingForTypeImpl(qt, S, false, true, 3695 FD); 3696 } 3697 } 3698 } 3699 S += RDecl->isUnion() ? ')' : '}'; 3700 return; 3701 } 3702 3703 if (T->isEnumeralType()) { 3704 if (FD && FD->isBitField()) 3705 EncodeBitField(this, S, T, FD); 3706 else 3707 S += 'i'; 3708 return; 3709 } 3710 3711 if (T->isBlockPointerType()) { 3712 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3713 return; 3714 } 3715 3716 // Ignore protocol qualifiers when mangling at this level. 3717 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 3718 T = OT->getBaseType(); 3719 3720 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3721 // @encode(class_name) 3722 ObjCInterfaceDecl *OI = OIT->getDecl(); 3723 S += '{'; 3724 const IdentifierInfo *II = OI->getIdentifier(); 3725 S += II->getName(); 3726 S += '='; 3727 llvm::SmallVector<FieldDecl*, 32> RecFields; 3728 CollectObjCIvars(OI, RecFields); 3729 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 3730 if (RecFields[i]->isBitField()) 3731 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3732 RecFields[i]); 3733 else 3734 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3735 FD); 3736 } 3737 S += '}'; 3738 return; 3739 } 3740 3741 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 3742 if (OPT->isObjCIdType()) { 3743 S += '@'; 3744 return; 3745 } 3746 3747 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 3748 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 3749 // Since this is a binary compatibility issue, need to consult with runtime 3750 // folks. Fortunately, this is a *very* obsure construct. 3751 S += '#'; 3752 return; 3753 } 3754 3755 if (OPT->isObjCQualifiedIdType()) { 3756 getObjCEncodingForTypeImpl(getObjCIdType(), S, 3757 ExpandPointedToStructures, 3758 ExpandStructures, FD); 3759 if (FD || EncodingProperty) { 3760 // Note that we do extended encoding of protocol qualifer list 3761 // Only when doing ivar or property encoding. 3762 S += '"'; 3763 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3764 E = OPT->qual_end(); I != E; ++I) { 3765 S += '<'; 3766 S += (*I)->getNameAsString(); 3767 S += '>'; 3768 } 3769 S += '"'; 3770 } 3771 return; 3772 } 3773 3774 QualType PointeeTy = OPT->getPointeeType(); 3775 if (!EncodingProperty && 3776 isa<TypedefType>(PointeeTy.getTypePtr())) { 3777 // Another historical/compatibility reason. 3778 // We encode the underlying type which comes out as 3779 // {...}; 3780 S += '^'; 3781 getObjCEncodingForTypeImpl(PointeeTy, S, 3782 false, ExpandPointedToStructures, 3783 NULL); 3784 return; 3785 } 3786 3787 S += '@'; 3788 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 3789 S += '"'; 3790 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 3791 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3792 E = OPT->qual_end(); I != E; ++I) { 3793 S += '<'; 3794 S += (*I)->getNameAsString(); 3795 S += '>'; 3796 } 3797 S += '"'; 3798 } 3799 return; 3800 } 3801 3802 // gcc just blithely ignores member pointers. 3803 // TODO: maybe there should be a mangling for these 3804 if (T->getAs<MemberPointerType>()) 3805 return; 3806 3807 assert(0 && "@encode for type not implemented!"); 3808} 3809 3810void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 3811 std::string& S) const { 3812 if (QT & Decl::OBJC_TQ_In) 3813 S += 'n'; 3814 if (QT & Decl::OBJC_TQ_Inout) 3815 S += 'N'; 3816 if (QT & Decl::OBJC_TQ_Out) 3817 S += 'o'; 3818 if (QT & Decl::OBJC_TQ_Bycopy) 3819 S += 'O'; 3820 if (QT & Decl::OBJC_TQ_Byref) 3821 S += 'R'; 3822 if (QT & Decl::OBJC_TQ_Oneway) 3823 S += 'V'; 3824} 3825 3826void ASTContext::setBuiltinVaListType(QualType T) { 3827 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 3828 3829 BuiltinVaListType = T; 3830} 3831 3832void ASTContext::setObjCIdType(QualType T) { 3833 ObjCIdTypedefType = T; 3834} 3835 3836void ASTContext::setObjCSelType(QualType T) { 3837 ObjCSelTypedefType = T; 3838} 3839 3840void ASTContext::setObjCProtoType(QualType QT) { 3841 ObjCProtoType = QT; 3842} 3843 3844void ASTContext::setObjCClassType(QualType T) { 3845 ObjCClassTypedefType = T; 3846} 3847 3848void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 3849 assert(ObjCConstantStringType.isNull() && 3850 "'NSConstantString' type already set!"); 3851 3852 ObjCConstantStringType = getObjCInterfaceType(Decl); 3853} 3854 3855/// \brief Retrieve the template name that corresponds to a non-empty 3856/// lookup. 3857TemplateName ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 3858 UnresolvedSetIterator End) { 3859 unsigned size = End - Begin; 3860 assert(size > 1 && "set is not overloaded!"); 3861 3862 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 3863 size * sizeof(FunctionTemplateDecl*)); 3864 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 3865 3866 NamedDecl **Storage = OT->getStorage(); 3867 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 3868 NamedDecl *D = *I; 3869 assert(isa<FunctionTemplateDecl>(D) || 3870 (isa<UsingShadowDecl>(D) && 3871 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 3872 *Storage++ = D; 3873 } 3874 3875 return TemplateName(OT); 3876} 3877 3878/// \brief Retrieve the template name that represents a qualified 3879/// template name such as \c std::vector. 3880TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 3881 bool TemplateKeyword, 3882 TemplateDecl *Template) { 3883 // FIXME: Canonicalization? 3884 llvm::FoldingSetNodeID ID; 3885 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 3886 3887 void *InsertPos = 0; 3888 QualifiedTemplateName *QTN = 3889 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3890 if (!QTN) { 3891 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 3892 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 3893 } 3894 3895 return TemplateName(QTN); 3896} 3897 3898/// \brief Retrieve the template name that represents a dependent 3899/// template name such as \c MetaFun::template apply. 3900TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3901 const IdentifierInfo *Name) { 3902 assert((!NNS || NNS->isDependent()) && 3903 "Nested name specifier must be dependent"); 3904 3905 llvm::FoldingSetNodeID ID; 3906 DependentTemplateName::Profile(ID, NNS, Name); 3907 3908 void *InsertPos = 0; 3909 DependentTemplateName *QTN = 3910 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3911 3912 if (QTN) 3913 return TemplateName(QTN); 3914 3915 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3916 if (CanonNNS == NNS) { 3917 QTN = new (*this,4) DependentTemplateName(NNS, Name); 3918 } else { 3919 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 3920 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 3921 DependentTemplateName *CheckQTN = 3922 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3923 assert(!CheckQTN && "Dependent type name canonicalization broken"); 3924 (void)CheckQTN; 3925 } 3926 3927 DependentTemplateNames.InsertNode(QTN, InsertPos); 3928 return TemplateName(QTN); 3929} 3930 3931/// \brief Retrieve the template name that represents a dependent 3932/// template name such as \c MetaFun::template operator+. 3933TemplateName 3934ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3935 OverloadedOperatorKind Operator) { 3936 assert((!NNS || NNS->isDependent()) && 3937 "Nested name specifier must be dependent"); 3938 3939 llvm::FoldingSetNodeID ID; 3940 DependentTemplateName::Profile(ID, NNS, Operator); 3941 3942 void *InsertPos = 0; 3943 DependentTemplateName *QTN 3944 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3945 3946 if (QTN) 3947 return TemplateName(QTN); 3948 3949 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3950 if (CanonNNS == NNS) { 3951 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 3952 } else { 3953 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 3954 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 3955 3956 DependentTemplateName *CheckQTN 3957 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3958 assert(!CheckQTN && "Dependent template name canonicalization broken"); 3959 (void)CheckQTN; 3960 } 3961 3962 DependentTemplateNames.InsertNode(QTN, InsertPos); 3963 return TemplateName(QTN); 3964} 3965 3966/// getFromTargetType - Given one of the integer types provided by 3967/// TargetInfo, produce the corresponding type. The unsigned @p Type 3968/// is actually a value of type @c TargetInfo::IntType. 3969CanQualType ASTContext::getFromTargetType(unsigned Type) const { 3970 switch (Type) { 3971 case TargetInfo::NoInt: return CanQualType(); 3972 case TargetInfo::SignedShort: return ShortTy; 3973 case TargetInfo::UnsignedShort: return UnsignedShortTy; 3974 case TargetInfo::SignedInt: return IntTy; 3975 case TargetInfo::UnsignedInt: return UnsignedIntTy; 3976 case TargetInfo::SignedLong: return LongTy; 3977 case TargetInfo::UnsignedLong: return UnsignedLongTy; 3978 case TargetInfo::SignedLongLong: return LongLongTy; 3979 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 3980 } 3981 3982 assert(false && "Unhandled TargetInfo::IntType value"); 3983 return CanQualType(); 3984} 3985 3986//===----------------------------------------------------------------------===// 3987// Type Predicates. 3988//===----------------------------------------------------------------------===// 3989 3990/// isObjCNSObjectType - Return true if this is an NSObject object using 3991/// NSObject attribute on a c-style pointer type. 3992/// FIXME - Make it work directly on types. 3993/// FIXME: Move to Type. 3994/// 3995bool ASTContext::isObjCNSObjectType(QualType Ty) const { 3996 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 3997 if (TypedefDecl *TD = TDT->getDecl()) 3998 if (TD->getAttr<ObjCNSObjectAttr>()) 3999 return true; 4000 } 4001 return false; 4002} 4003 4004/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 4005/// garbage collection attribute. 4006/// 4007Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 4008 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 4009 if (getLangOptions().ObjC1 && 4010 getLangOptions().getGCMode() != LangOptions::NonGC) { 4011 GCAttrs = Ty.getObjCGCAttr(); 4012 // Default behavious under objective-c's gc is for objective-c pointers 4013 // (or pointers to them) be treated as though they were declared 4014 // as __strong. 4015 if (GCAttrs == Qualifiers::GCNone) { 4016 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 4017 GCAttrs = Qualifiers::Strong; 4018 else if (Ty->isPointerType()) 4019 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 4020 } 4021 // Non-pointers have none gc'able attribute regardless of the attribute 4022 // set on them. 4023 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 4024 return Qualifiers::GCNone; 4025 } 4026 return GCAttrs; 4027} 4028 4029//===----------------------------------------------------------------------===// 4030// Type Compatibility Testing 4031//===----------------------------------------------------------------------===// 4032 4033/// areCompatVectorTypes - Return true if the two specified vector types are 4034/// compatible. 4035static bool areCompatVectorTypes(const VectorType *LHS, 4036 const VectorType *RHS) { 4037 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 4038 return LHS->getElementType() == RHS->getElementType() && 4039 LHS->getNumElements() == RHS->getNumElements(); 4040} 4041 4042//===----------------------------------------------------------------------===// 4043// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 4044//===----------------------------------------------------------------------===// 4045 4046/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 4047/// inheritance hierarchy of 'rProto'. 4048bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 4049 ObjCProtocolDecl *rProto) { 4050 if (lProto == rProto) 4051 return true; 4052 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 4053 E = rProto->protocol_end(); PI != E; ++PI) 4054 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 4055 return true; 4056 return false; 4057} 4058 4059/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 4060/// return true if lhs's protocols conform to rhs's protocol; false 4061/// otherwise. 4062bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 4063 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 4064 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 4065 return false; 4066} 4067 4068/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 4069/// ObjCQualifiedIDType. 4070bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4071 bool compare) { 4072 // Allow id<P..> and an 'id' or void* type in all cases. 4073 if (lhs->isVoidPointerType() || 4074 lhs->isObjCIdType() || lhs->isObjCClassType()) 4075 return true; 4076 else if (rhs->isVoidPointerType() || 4077 rhs->isObjCIdType() || rhs->isObjCClassType()) 4078 return true; 4079 4080 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4081 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4082 4083 if (!rhsOPT) return false; 4084 4085 if (rhsOPT->qual_empty()) { 4086 // If the RHS is a unqualified interface pointer "NSString*", 4087 // make sure we check the class hierarchy. 4088 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4089 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4090 E = lhsQID->qual_end(); I != E; ++I) { 4091 // when comparing an id<P> on lhs with a static type on rhs, 4092 // see if static class implements all of id's protocols, directly or 4093 // through its super class and categories. 4094 if (!rhsID->ClassImplementsProtocol(*I, true)) 4095 return false; 4096 } 4097 } 4098 // If there are no qualifiers and no interface, we have an 'id'. 4099 return true; 4100 } 4101 // Both the right and left sides have qualifiers. 4102 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4103 E = lhsQID->qual_end(); I != E; ++I) { 4104 ObjCProtocolDecl *lhsProto = *I; 4105 bool match = false; 4106 4107 // when comparing an id<P> on lhs with a static type on rhs, 4108 // see if static class implements all of id's protocols, directly or 4109 // through its super class and categories. 4110 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4111 E = rhsOPT->qual_end(); J != E; ++J) { 4112 ObjCProtocolDecl *rhsProto = *J; 4113 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4114 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4115 match = true; 4116 break; 4117 } 4118 } 4119 // If the RHS is a qualified interface pointer "NSString<P>*", 4120 // make sure we check the class hierarchy. 4121 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4122 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4123 E = lhsQID->qual_end(); I != E; ++I) { 4124 // when comparing an id<P> on lhs with a static type on rhs, 4125 // see if static class implements all of id's protocols, directly or 4126 // through its super class and categories. 4127 if (rhsID->ClassImplementsProtocol(*I, true)) { 4128 match = true; 4129 break; 4130 } 4131 } 4132 } 4133 if (!match) 4134 return false; 4135 } 4136 4137 return true; 4138 } 4139 4140 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4141 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4142 4143 if (const ObjCObjectPointerType *lhsOPT = 4144 lhs->getAsObjCInterfacePointerType()) { 4145 if (lhsOPT->qual_empty()) { 4146 bool match = false; 4147 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4148 for (ObjCObjectPointerType::qual_iterator I = rhsQID->qual_begin(), 4149 E = rhsQID->qual_end(); I != E; ++I) { 4150 // when comparing an id<P> on lhs with a static type on rhs, 4151 // see if static class implements all of id's protocols, directly or 4152 // through its super class and categories. 4153 if (lhsID->ClassImplementsProtocol(*I, true)) { 4154 match = true; 4155 break; 4156 } 4157 } 4158 if (!match) 4159 return false; 4160 } 4161 return true; 4162 } 4163 // Both the right and left sides have qualifiers. 4164 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4165 E = lhsOPT->qual_end(); I != E; ++I) { 4166 ObjCProtocolDecl *lhsProto = *I; 4167 bool match = false; 4168 4169 // when comparing an id<P> on lhs with a static type on rhs, 4170 // see if static class implements all of id's protocols, directly or 4171 // through its super class and categories. 4172 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4173 E = rhsQID->qual_end(); J != E; ++J) { 4174 ObjCProtocolDecl *rhsProto = *J; 4175 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4176 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4177 match = true; 4178 break; 4179 } 4180 } 4181 if (!match) 4182 return false; 4183 } 4184 return true; 4185 } 4186 return false; 4187} 4188 4189/// canAssignObjCInterfaces - Return true if the two interface types are 4190/// compatible for assignment from RHS to LHS. This handles validation of any 4191/// protocol qualifiers on the LHS or RHS. 4192/// 4193bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4194 const ObjCObjectPointerType *RHSOPT) { 4195 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4196 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4197 4198 // If either type represents the built-in 'id' or 'Class' types, return true. 4199 if (LHS->isObjCUnqualifiedIdOrClass() || 4200 RHS->isObjCUnqualifiedIdOrClass()) 4201 return true; 4202 4203 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 4204 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4205 QualType(RHSOPT,0), 4206 false); 4207 4208 // If we have 2 user-defined types, fall into that path. 4209 if (LHS->getInterface() && RHS->getInterface()) 4210 return canAssignObjCInterfaces(LHS, RHS); 4211 4212 return false; 4213} 4214 4215/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4216/// for providing type-safty for objective-c pointers used to pass/return 4217/// arguments in block literals. When passed as arguments, passing 'A*' where 4218/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4219/// not OK. For the return type, the opposite is not OK. 4220bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4221 const ObjCObjectPointerType *LHSOPT, 4222 const ObjCObjectPointerType *RHSOPT) { 4223 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4224 return true; 4225 4226 if (LHSOPT->isObjCBuiltinType()) { 4227 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4228 } 4229 4230 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4231 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4232 QualType(RHSOPT,0), 4233 false); 4234 4235 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4236 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4237 if (LHS && RHS) { // We have 2 user-defined types. 4238 if (LHS != RHS) { 4239 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4240 return false; 4241 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4242 return true; 4243 } 4244 else 4245 return true; 4246 } 4247 return false; 4248} 4249 4250/// getIntersectionOfProtocols - This routine finds the intersection of set 4251/// of protocols inherited from two distinct objective-c pointer objects. 4252/// It is used to build composite qualifier list of the composite type of 4253/// the conditional expression involving two objective-c pointer objects. 4254static 4255void getIntersectionOfProtocols(ASTContext &Context, 4256 const ObjCObjectPointerType *LHSOPT, 4257 const ObjCObjectPointerType *RHSOPT, 4258 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4259 4260 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4261 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4262 assert(LHS->getInterface() && "LHS must have an interface base"); 4263 assert(RHS->getInterface() && "RHS must have an interface base"); 4264 4265 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4266 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4267 if (LHSNumProtocols > 0) 4268 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4269 else { 4270 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4271 Context.CollectInheritedProtocols(LHS->getInterface(), 4272 LHSInheritedProtocols); 4273 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4274 LHSInheritedProtocols.end()); 4275 } 4276 4277 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4278 if (RHSNumProtocols > 0) { 4279 ObjCProtocolDecl **RHSProtocols = 4280 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4281 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4282 if (InheritedProtocolSet.count(RHSProtocols[i])) 4283 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4284 } 4285 else { 4286 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4287 Context.CollectInheritedProtocols(RHS->getInterface(), 4288 RHSInheritedProtocols); 4289 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4290 RHSInheritedProtocols.begin(), 4291 E = RHSInheritedProtocols.end(); I != E; ++I) 4292 if (InheritedProtocolSet.count((*I))) 4293 IntersectionOfProtocols.push_back((*I)); 4294 } 4295} 4296 4297/// areCommonBaseCompatible - Returns common base class of the two classes if 4298/// one found. Note that this is O'2 algorithm. But it will be called as the 4299/// last type comparison in a ?-exp of ObjC pointer types before a 4300/// warning is issued. So, its invokation is extremely rare. 4301QualType ASTContext::areCommonBaseCompatible( 4302 const ObjCObjectPointerType *Lptr, 4303 const ObjCObjectPointerType *Rptr) { 4304 const ObjCObjectType *LHS = Lptr->getObjectType(); 4305 const ObjCObjectType *RHS = Rptr->getObjectType(); 4306 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 4307 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 4308 if (!LDecl || !RDecl) 4309 return QualType(); 4310 4311 while ((LDecl = LDecl->getSuperClass())) { 4312 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 4313 if (canAssignObjCInterfaces(LHS, RHS)) { 4314 llvm::SmallVector<ObjCProtocolDecl *, 8> Protocols; 4315 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 4316 4317 QualType Result = QualType(LHS, 0); 4318 if (!Protocols.empty()) 4319 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 4320 Result = getObjCObjectPointerType(Result); 4321 return Result; 4322 } 4323 } 4324 4325 return QualType(); 4326} 4327 4328bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 4329 const ObjCObjectType *RHS) { 4330 assert(LHS->getInterface() && "LHS is not an interface type"); 4331 assert(RHS->getInterface() && "RHS is not an interface type"); 4332 4333 // Verify that the base decls are compatible: the RHS must be a subclass of 4334 // the LHS. 4335 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 4336 return false; 4337 4338 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4339 // protocol qualified at all, then we are good. 4340 if (LHS->getNumProtocols() == 0) 4341 return true; 4342 4343 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4344 // isn't a superset. 4345 if (RHS->getNumProtocols() == 0) 4346 return true; // FIXME: should return false! 4347 4348 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 4349 LHSPE = LHS->qual_end(); 4350 LHSPI != LHSPE; LHSPI++) { 4351 bool RHSImplementsProtocol = false; 4352 4353 // If the RHS doesn't implement the protocol on the left, the types 4354 // are incompatible. 4355 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 4356 RHSPE = RHS->qual_end(); 4357 RHSPI != RHSPE; RHSPI++) { 4358 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4359 RHSImplementsProtocol = true; 4360 break; 4361 } 4362 } 4363 // FIXME: For better diagnostics, consider passing back the protocol name. 4364 if (!RHSImplementsProtocol) 4365 return false; 4366 } 4367 // The RHS implements all protocols listed on the LHS. 4368 return true; 4369} 4370 4371bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4372 // get the "pointed to" types 4373 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4374 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4375 4376 if (!LHSOPT || !RHSOPT) 4377 return false; 4378 4379 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4380 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4381} 4382 4383/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4384/// both shall have the identically qualified version of a compatible type. 4385/// C99 6.2.7p1: Two types have compatible types if their types are the 4386/// same. See 6.7.[2,3,5] for additional rules. 4387bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 4388 if (getLangOptions().CPlusPlus) 4389 return hasSameType(LHS, RHS); 4390 4391 return !mergeTypes(LHS, RHS).isNull(); 4392} 4393 4394bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 4395 return !mergeTypes(LHS, RHS, true).isNull(); 4396} 4397 4398QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 4399 bool OfBlockPointer) { 4400 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4401 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4402 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4403 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4404 bool allLTypes = true; 4405 bool allRTypes = true; 4406 4407 // Check return type 4408 QualType retType; 4409 if (OfBlockPointer) 4410 retType = mergeTypes(rbase->getResultType(), lbase->getResultType(), true); 4411 else 4412 retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 4413 if (retType.isNull()) return QualType(); 4414 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 4415 allLTypes = false; 4416 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 4417 allRTypes = false; 4418 // FIXME: double check this 4419 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 4420 // rbase->getRegParmAttr() != 0 && 4421 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 4422 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 4423 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 4424 unsigned RegParm = lbaseInfo.getRegParm() == 0 ? rbaseInfo.getRegParm() : 4425 lbaseInfo.getRegParm(); 4426 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 4427 if (NoReturn != lbaseInfo.getNoReturn() || 4428 RegParm != lbaseInfo.getRegParm()) 4429 allLTypes = false; 4430 if (NoReturn != rbaseInfo.getNoReturn() || 4431 RegParm != rbaseInfo.getRegParm()) 4432 allRTypes = false; 4433 CallingConv lcc = lbaseInfo.getCC(); 4434 CallingConv rcc = rbaseInfo.getCC(); 4435 // Compatible functions must have compatible calling conventions 4436 if (!isSameCallConv(lcc, rcc)) 4437 return QualType(); 4438 4439 if (lproto && rproto) { // two C99 style function prototypes 4440 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4441 "C++ shouldn't be here"); 4442 unsigned lproto_nargs = lproto->getNumArgs(); 4443 unsigned rproto_nargs = rproto->getNumArgs(); 4444 4445 // Compatible functions must have the same number of arguments 4446 if (lproto_nargs != rproto_nargs) 4447 return QualType(); 4448 4449 // Variadic and non-variadic functions aren't compatible 4450 if (lproto->isVariadic() != rproto->isVariadic()) 4451 return QualType(); 4452 4453 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4454 return QualType(); 4455 4456 // Check argument compatibility 4457 llvm::SmallVector<QualType, 10> types; 4458 for (unsigned i = 0; i < lproto_nargs; i++) { 4459 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4460 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4461 QualType argtype = mergeTypes(largtype, rargtype, OfBlockPointer); 4462 if (argtype.isNull()) return QualType(); 4463 types.push_back(argtype); 4464 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4465 allLTypes = false; 4466 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4467 allRTypes = false; 4468 } 4469 if (allLTypes) return lhs; 4470 if (allRTypes) return rhs; 4471 return getFunctionType(retType, types.begin(), types.size(), 4472 lproto->isVariadic(), lproto->getTypeQuals(), 4473 false, false, 0, 0, 4474 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4475 } 4476 4477 if (lproto) allRTypes = false; 4478 if (rproto) allLTypes = false; 4479 4480 const FunctionProtoType *proto = lproto ? lproto : rproto; 4481 if (proto) { 4482 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4483 if (proto->isVariadic()) return QualType(); 4484 // Check that the types are compatible with the types that 4485 // would result from default argument promotions (C99 6.7.5.3p15). 4486 // The only types actually affected are promotable integer 4487 // types and floats, which would be passed as a different 4488 // type depending on whether the prototype is visible. 4489 unsigned proto_nargs = proto->getNumArgs(); 4490 for (unsigned i = 0; i < proto_nargs; ++i) { 4491 QualType argTy = proto->getArgType(i); 4492 4493 // Look at the promotion type of enum types, since that is the type used 4494 // to pass enum values. 4495 if (const EnumType *Enum = argTy->getAs<EnumType>()) 4496 argTy = Enum->getDecl()->getPromotionType(); 4497 4498 if (argTy->isPromotableIntegerType() || 4499 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4500 return QualType(); 4501 } 4502 4503 if (allLTypes) return lhs; 4504 if (allRTypes) return rhs; 4505 return getFunctionType(retType, proto->arg_type_begin(), 4506 proto->getNumArgs(), proto->isVariadic(), 4507 proto->getTypeQuals(), 4508 false, false, 0, 0, 4509 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4510 } 4511 4512 if (allLTypes) return lhs; 4513 if (allRTypes) return rhs; 4514 FunctionType::ExtInfo Info(NoReturn, RegParm, lcc); 4515 return getFunctionNoProtoType(retType, Info); 4516} 4517 4518QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 4519 bool OfBlockPointer) { 4520 // C++ [expr]: If an expression initially has the type "reference to T", the 4521 // type is adjusted to "T" prior to any further analysis, the expression 4522 // designates the object or function denoted by the reference, and the 4523 // expression is an lvalue unless the reference is an rvalue reference and 4524 // the expression is a function call (possibly inside parentheses). 4525 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 4526 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 4527 4528 QualType LHSCan = getCanonicalType(LHS), 4529 RHSCan = getCanonicalType(RHS); 4530 4531 // If two types are identical, they are compatible. 4532 if (LHSCan == RHSCan) 4533 return LHS; 4534 4535 // If the qualifiers are different, the types aren't compatible... mostly. 4536 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4537 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4538 if (LQuals != RQuals) { 4539 // If any of these qualifiers are different, we have a type 4540 // mismatch. 4541 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4542 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4543 return QualType(); 4544 4545 // Exactly one GC qualifier difference is allowed: __strong is 4546 // okay if the other type has no GC qualifier but is an Objective 4547 // C object pointer (i.e. implicitly strong by default). We fix 4548 // this by pretending that the unqualified type was actually 4549 // qualified __strong. 4550 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4551 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4552 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4553 4554 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4555 return QualType(); 4556 4557 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4558 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4559 } 4560 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4561 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4562 } 4563 return QualType(); 4564 } 4565 4566 // Okay, qualifiers are equal. 4567 4568 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4569 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4570 4571 // We want to consider the two function types to be the same for these 4572 // comparisons, just force one to the other. 4573 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 4574 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 4575 4576 // Same as above for arrays 4577 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 4578 LHSClass = Type::ConstantArray; 4579 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 4580 RHSClass = Type::ConstantArray; 4581 4582 // ObjCInterfaces are just specialized ObjCObjects. 4583 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 4584 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 4585 4586 // Canonicalize ExtVector -> Vector. 4587 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 4588 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 4589 4590 // If the canonical type classes don't match. 4591 if (LHSClass != RHSClass) { 4592 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 4593 // a signed integer type, or an unsigned integer type. 4594 // Compatibility is based on the underlying type, not the promotion 4595 // type. 4596 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 4597 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 4598 return RHS; 4599 } 4600 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 4601 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 4602 return LHS; 4603 } 4604 4605 return QualType(); 4606 } 4607 4608 // The canonical type classes match. 4609 switch (LHSClass) { 4610#define TYPE(Class, Base) 4611#define ABSTRACT_TYPE(Class, Base) 4612#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 4613#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4614#define DEPENDENT_TYPE(Class, Base) case Type::Class: 4615#include "clang/AST/TypeNodes.def" 4616 assert(false && "Non-canonical and dependent types shouldn't get here"); 4617 return QualType(); 4618 4619 case Type::LValueReference: 4620 case Type::RValueReference: 4621 case Type::MemberPointer: 4622 assert(false && "C++ should never be in mergeTypes"); 4623 return QualType(); 4624 4625 case Type::ObjCInterface: 4626 case Type::IncompleteArray: 4627 case Type::VariableArray: 4628 case Type::FunctionProto: 4629 case Type::ExtVector: 4630 assert(false && "Types are eliminated above"); 4631 return QualType(); 4632 4633 case Type::Pointer: 4634 { 4635 // Merge two pointer types, while trying to preserve typedef info 4636 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 4637 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 4638 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 4639 if (ResultType.isNull()) return QualType(); 4640 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4641 return LHS; 4642 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4643 return RHS; 4644 return getPointerType(ResultType); 4645 } 4646 case Type::BlockPointer: 4647 { 4648 // Merge two block pointer types, while trying to preserve typedef info 4649 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 4650 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 4651 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer); 4652 if (ResultType.isNull()) return QualType(); 4653 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4654 return LHS; 4655 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4656 return RHS; 4657 return getBlockPointerType(ResultType); 4658 } 4659 case Type::ConstantArray: 4660 { 4661 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 4662 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 4663 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 4664 return QualType(); 4665 4666 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 4667 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 4668 QualType ResultType = mergeTypes(LHSElem, RHSElem); 4669 if (ResultType.isNull()) return QualType(); 4670 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4671 return LHS; 4672 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4673 return RHS; 4674 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 4675 ArrayType::ArraySizeModifier(), 0); 4676 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 4677 ArrayType::ArraySizeModifier(), 0); 4678 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 4679 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 4680 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4681 return LHS; 4682 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4683 return RHS; 4684 if (LVAT) { 4685 // FIXME: This isn't correct! But tricky to implement because 4686 // the array's size has to be the size of LHS, but the type 4687 // has to be different. 4688 return LHS; 4689 } 4690 if (RVAT) { 4691 // FIXME: This isn't correct! But tricky to implement because 4692 // the array's size has to be the size of RHS, but the type 4693 // has to be different. 4694 return RHS; 4695 } 4696 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 4697 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 4698 return getIncompleteArrayType(ResultType, 4699 ArrayType::ArraySizeModifier(), 0); 4700 } 4701 case Type::FunctionNoProto: 4702 return mergeFunctionTypes(LHS, RHS, OfBlockPointer); 4703 case Type::Record: 4704 case Type::Enum: 4705 return QualType(); 4706 case Type::Builtin: 4707 // Only exactly equal builtin types are compatible, which is tested above. 4708 return QualType(); 4709 case Type::Complex: 4710 // Distinct complex types are incompatible. 4711 return QualType(); 4712 case Type::Vector: 4713 // FIXME: The merged type should be an ExtVector! 4714 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 4715 RHSCan->getAs<VectorType>())) 4716 return LHS; 4717 return QualType(); 4718 case Type::ObjCObject: { 4719 // Check if the types are assignment compatible. 4720 // FIXME: This should be type compatibility, e.g. whether 4721 // "LHS x; RHS x;" at global scope is legal. 4722 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 4723 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 4724 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 4725 return LHS; 4726 4727 return QualType(); 4728 } 4729 case Type::ObjCObjectPointer: { 4730 if (OfBlockPointer) { 4731 if (canAssignObjCInterfacesInBlockPointer( 4732 LHS->getAs<ObjCObjectPointerType>(), 4733 RHS->getAs<ObjCObjectPointerType>())) 4734 return LHS; 4735 return QualType(); 4736 } 4737 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 4738 RHS->getAs<ObjCObjectPointerType>())) 4739 return LHS; 4740 4741 return QualType(); 4742 } 4743 } 4744 4745 return QualType(); 4746} 4747 4748/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 4749/// 'RHS' attributes and returns the merged version; including for function 4750/// return types. 4751QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 4752 QualType LHSCan = getCanonicalType(LHS), 4753 RHSCan = getCanonicalType(RHS); 4754 // If two types are identical, they are compatible. 4755 if (LHSCan == RHSCan) 4756 return LHS; 4757 if (RHSCan->isFunctionType()) { 4758 if (!LHSCan->isFunctionType()) 4759 return QualType(); 4760 QualType OldReturnType = 4761 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 4762 QualType NewReturnType = 4763 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 4764 QualType ResReturnType = 4765 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 4766 if (ResReturnType.isNull()) 4767 return QualType(); 4768 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 4769 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 4770 // In either case, use OldReturnType to build the new function type. 4771 const FunctionType *F = LHS->getAs<FunctionType>(); 4772 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 4773 FunctionType::ExtInfo Info = getFunctionExtInfo(LHS); 4774 QualType ResultType 4775 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 4776 FPT->getNumArgs(), FPT->isVariadic(), 4777 FPT->getTypeQuals(), 4778 FPT->hasExceptionSpec(), 4779 FPT->hasAnyExceptionSpec(), 4780 FPT->getNumExceptions(), 4781 FPT->exception_begin(), 4782 Info); 4783 return ResultType; 4784 } 4785 } 4786 return QualType(); 4787 } 4788 4789 // If the qualifiers are different, the types can still be merged. 4790 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4791 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4792 if (LQuals != RQuals) { 4793 // If any of these qualifiers are different, we have a type mismatch. 4794 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4795 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4796 return QualType(); 4797 4798 // Exactly one GC qualifier difference is allowed: __strong is 4799 // okay if the other type has no GC qualifier but is an Objective 4800 // C object pointer (i.e. implicitly strong by default). We fix 4801 // this by pretending that the unqualified type was actually 4802 // qualified __strong. 4803 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4804 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4805 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4806 4807 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4808 return QualType(); 4809 4810 if (GC_L == Qualifiers::Strong) 4811 return LHS; 4812 if (GC_R == Qualifiers::Strong) 4813 return RHS; 4814 return QualType(); 4815 } 4816 4817 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 4818 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 4819 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 4820 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 4821 if (ResQT == LHSBaseQT) 4822 return LHS; 4823 if (ResQT == RHSBaseQT) 4824 return RHS; 4825 } 4826 return QualType(); 4827} 4828 4829//===----------------------------------------------------------------------===// 4830// Integer Predicates 4831//===----------------------------------------------------------------------===// 4832 4833unsigned ASTContext::getIntWidth(QualType T) { 4834 if (T->isBooleanType()) 4835 return 1; 4836 if (EnumType *ET = dyn_cast<EnumType>(T)) 4837 T = ET->getDecl()->getIntegerType(); 4838 // For builtin types, just use the standard type sizing method 4839 return (unsigned)getTypeSize(T); 4840} 4841 4842QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 4843 assert(T->isSignedIntegerType() && "Unexpected type"); 4844 4845 // Turn <4 x signed int> -> <4 x unsigned int> 4846 if (const VectorType *VTy = T->getAs<VectorType>()) 4847 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 4848 VTy->getNumElements(), VTy->isAltiVec(), VTy->isPixel()); 4849 4850 // For enums, we return the unsigned version of the base type. 4851 if (const EnumType *ETy = T->getAs<EnumType>()) 4852 T = ETy->getDecl()->getIntegerType(); 4853 4854 const BuiltinType *BTy = T->getAs<BuiltinType>(); 4855 assert(BTy && "Unexpected signed integer type"); 4856 switch (BTy->getKind()) { 4857 case BuiltinType::Char_S: 4858 case BuiltinType::SChar: 4859 return UnsignedCharTy; 4860 case BuiltinType::Short: 4861 return UnsignedShortTy; 4862 case BuiltinType::Int: 4863 return UnsignedIntTy; 4864 case BuiltinType::Long: 4865 return UnsignedLongTy; 4866 case BuiltinType::LongLong: 4867 return UnsignedLongLongTy; 4868 case BuiltinType::Int128: 4869 return UnsignedInt128Ty; 4870 default: 4871 assert(0 && "Unexpected signed integer type"); 4872 return QualType(); 4873 } 4874} 4875 4876ExternalASTSource::~ExternalASTSource() { } 4877 4878void ExternalASTSource::PrintStats() { } 4879 4880 4881//===----------------------------------------------------------------------===// 4882// Builtin Type Computation 4883//===----------------------------------------------------------------------===// 4884 4885/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 4886/// pointer over the consumed characters. This returns the resultant type. 4887static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 4888 ASTContext::GetBuiltinTypeError &Error, 4889 bool AllowTypeModifiers = true) { 4890 // Modifiers. 4891 int HowLong = 0; 4892 bool Signed = false, Unsigned = false; 4893 4894 // Read the modifiers first. 4895 bool Done = false; 4896 while (!Done) { 4897 switch (*Str++) { 4898 default: Done = true; --Str; break; 4899 case 'S': 4900 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 4901 assert(!Signed && "Can't use 'S' modifier multiple times!"); 4902 Signed = true; 4903 break; 4904 case 'U': 4905 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 4906 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 4907 Unsigned = true; 4908 break; 4909 case 'L': 4910 assert(HowLong <= 2 && "Can't have LLLL modifier"); 4911 ++HowLong; 4912 break; 4913 } 4914 } 4915 4916 QualType Type; 4917 4918 // Read the base type. 4919 switch (*Str++) { 4920 default: assert(0 && "Unknown builtin type letter!"); 4921 case 'v': 4922 assert(HowLong == 0 && !Signed && !Unsigned && 4923 "Bad modifiers used with 'v'!"); 4924 Type = Context.VoidTy; 4925 break; 4926 case 'f': 4927 assert(HowLong == 0 && !Signed && !Unsigned && 4928 "Bad modifiers used with 'f'!"); 4929 Type = Context.FloatTy; 4930 break; 4931 case 'd': 4932 assert(HowLong < 2 && !Signed && !Unsigned && 4933 "Bad modifiers used with 'd'!"); 4934 if (HowLong) 4935 Type = Context.LongDoubleTy; 4936 else 4937 Type = Context.DoubleTy; 4938 break; 4939 case 's': 4940 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 4941 if (Unsigned) 4942 Type = Context.UnsignedShortTy; 4943 else 4944 Type = Context.ShortTy; 4945 break; 4946 case 'i': 4947 if (HowLong == 3) 4948 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 4949 else if (HowLong == 2) 4950 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 4951 else if (HowLong == 1) 4952 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 4953 else 4954 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 4955 break; 4956 case 'c': 4957 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 4958 if (Signed) 4959 Type = Context.SignedCharTy; 4960 else if (Unsigned) 4961 Type = Context.UnsignedCharTy; 4962 else 4963 Type = Context.CharTy; 4964 break; 4965 case 'b': // boolean 4966 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 4967 Type = Context.BoolTy; 4968 break; 4969 case 'z': // size_t. 4970 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 4971 Type = Context.getSizeType(); 4972 break; 4973 case 'F': 4974 Type = Context.getCFConstantStringType(); 4975 break; 4976 case 'a': 4977 Type = Context.getBuiltinVaListType(); 4978 assert(!Type.isNull() && "builtin va list type not initialized!"); 4979 break; 4980 case 'A': 4981 // This is a "reference" to a va_list; however, what exactly 4982 // this means depends on how va_list is defined. There are two 4983 // different kinds of va_list: ones passed by value, and ones 4984 // passed by reference. An example of a by-value va_list is 4985 // x86, where va_list is a char*. An example of by-ref va_list 4986 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 4987 // we want this argument to be a char*&; for x86-64, we want 4988 // it to be a __va_list_tag*. 4989 Type = Context.getBuiltinVaListType(); 4990 assert(!Type.isNull() && "builtin va list type not initialized!"); 4991 if (Type->isArrayType()) { 4992 Type = Context.getArrayDecayedType(Type); 4993 } else { 4994 Type = Context.getLValueReferenceType(Type); 4995 } 4996 break; 4997 case 'V': { 4998 char *End; 4999 unsigned NumElements = strtoul(Str, &End, 10); 5000 assert(End != Str && "Missing vector size"); 5001 5002 Str = End; 5003 5004 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 5005 // FIXME: Don't know what to do about AltiVec. 5006 Type = Context.getVectorType(ElementType, NumElements, false, false); 5007 break; 5008 } 5009 case 'X': { 5010 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 5011 Type = Context.getComplexType(ElementType); 5012 break; 5013 } 5014 case 'P': 5015 Type = Context.getFILEType(); 5016 if (Type.isNull()) { 5017 Error = ASTContext::GE_Missing_stdio; 5018 return QualType(); 5019 } 5020 break; 5021 case 'J': 5022 if (Signed) 5023 Type = Context.getsigjmp_bufType(); 5024 else 5025 Type = Context.getjmp_bufType(); 5026 5027 if (Type.isNull()) { 5028 Error = ASTContext::GE_Missing_setjmp; 5029 return QualType(); 5030 } 5031 break; 5032 } 5033 5034 if (!AllowTypeModifiers) 5035 return Type; 5036 5037 Done = false; 5038 while (!Done) { 5039 switch (char c = *Str++) { 5040 default: Done = true; --Str; break; 5041 case '*': 5042 case '&': 5043 { 5044 // Both pointers and references can have their pointee types 5045 // qualified with an address space. 5046 char *End; 5047 unsigned AddrSpace = strtoul(Str, &End, 10); 5048 if (End != Str && AddrSpace != 0) { 5049 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 5050 Str = End; 5051 } 5052 } 5053 if (c == '*') 5054 Type = Context.getPointerType(Type); 5055 else 5056 Type = Context.getLValueReferenceType(Type); 5057 break; 5058 // FIXME: There's no way to have a built-in with an rvalue ref arg. 5059 case 'C': 5060 Type = Type.withConst(); 5061 break; 5062 case 'D': 5063 Type = Context.getVolatileType(Type); 5064 break; 5065 } 5066 } 5067 5068 return Type; 5069} 5070 5071/// GetBuiltinType - Return the type for the specified builtin. 5072QualType ASTContext::GetBuiltinType(unsigned id, 5073 GetBuiltinTypeError &Error) { 5074 const char *TypeStr = BuiltinInfo.GetTypeString(id); 5075 5076 llvm::SmallVector<QualType, 8> ArgTypes; 5077 5078 Error = GE_None; 5079 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 5080 if (Error != GE_None) 5081 return QualType(); 5082 while (TypeStr[0] && TypeStr[0] != '.') { 5083 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 5084 if (Error != GE_None) 5085 return QualType(); 5086 5087 // Do array -> pointer decay. The builtin should use the decayed type. 5088 if (Ty->isArrayType()) 5089 Ty = getArrayDecayedType(Ty); 5090 5091 ArgTypes.push_back(Ty); 5092 } 5093 5094 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 5095 "'.' should only occur at end of builtin type list!"); 5096 5097 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 5098 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 5099 return getFunctionNoProtoType(ResType); 5100 5101 // FIXME: Should we create noreturn types? 5102 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 5103 TypeStr[0] == '.', 0, false, false, 0, 0, 5104 FunctionType::ExtInfo()); 5105} 5106 5107QualType 5108ASTContext::UsualArithmeticConversionsType(QualType lhs, QualType rhs) { 5109 // Perform the usual unary conversions. We do this early so that 5110 // integral promotions to "int" can allow us to exit early, in the 5111 // lhs == rhs check. Also, for conversion purposes, we ignore any 5112 // qualifiers. For example, "const float" and "float" are 5113 // equivalent. 5114 if (lhs->isPromotableIntegerType()) 5115 lhs = getPromotedIntegerType(lhs); 5116 else 5117 lhs = lhs.getUnqualifiedType(); 5118 if (rhs->isPromotableIntegerType()) 5119 rhs = getPromotedIntegerType(rhs); 5120 else 5121 rhs = rhs.getUnqualifiedType(); 5122 5123 // If both types are identical, no conversion is needed. 5124 if (lhs == rhs) 5125 return lhs; 5126 5127 // If either side is a non-arithmetic type (e.g. a pointer), we are done. 5128 // The caller can deal with this (e.g. pointer + int). 5129 if (!lhs->isArithmeticType() || !rhs->isArithmeticType()) 5130 return lhs; 5131 5132 // At this point, we have two different arithmetic types. 5133 5134 // Handle complex types first (C99 6.3.1.8p1). 5135 if (lhs->isComplexType() || rhs->isComplexType()) { 5136 // if we have an integer operand, the result is the complex type. 5137 if (rhs->isIntegerType() || rhs->isComplexIntegerType()) { 5138 // convert the rhs to the lhs complex type. 5139 return lhs; 5140 } 5141 if (lhs->isIntegerType() || lhs->isComplexIntegerType()) { 5142 // convert the lhs to the rhs complex type. 5143 return rhs; 5144 } 5145 // This handles complex/complex, complex/float, or float/complex. 5146 // When both operands are complex, the shorter operand is converted to the 5147 // type of the longer, and that is the type of the result. This corresponds 5148 // to what is done when combining two real floating-point operands. 5149 // The fun begins when size promotion occur across type domains. 5150 // From H&S 6.3.4: When one operand is complex and the other is a real 5151 // floating-point type, the less precise type is converted, within it's 5152 // real or complex domain, to the precision of the other type. For example, 5153 // when combining a "long double" with a "double _Complex", the 5154 // "double _Complex" is promoted to "long double _Complex". 5155 int result = getFloatingTypeOrder(lhs, rhs); 5156 5157 if (result > 0) { // The left side is bigger, convert rhs. 5158 rhs = getFloatingTypeOfSizeWithinDomain(lhs, rhs); 5159 } else if (result < 0) { // The right side is bigger, convert lhs. 5160 lhs = getFloatingTypeOfSizeWithinDomain(rhs, lhs); 5161 } 5162 // At this point, lhs and rhs have the same rank/size. Now, make sure the 5163 // domains match. This is a requirement for our implementation, C99 5164 // does not require this promotion. 5165 if (lhs != rhs) { // Domains don't match, we have complex/float mix. 5166 if (lhs->isRealFloatingType()) { // handle "double, _Complex double". 5167 return rhs; 5168 } else { // handle "_Complex double, double". 5169 return lhs; 5170 } 5171 } 5172 return lhs; // The domain/size match exactly. 5173 } 5174 // Now handle "real" floating types (i.e. float, double, long double). 5175 if (lhs->isRealFloatingType() || rhs->isRealFloatingType()) { 5176 // if we have an integer operand, the result is the real floating type. 5177 if (rhs->isIntegerType()) { 5178 // convert rhs to the lhs floating point type. 5179 return lhs; 5180 } 5181 if (rhs->isComplexIntegerType()) { 5182 // convert rhs to the complex floating point type. 5183 return getComplexType(lhs); 5184 } 5185 if (lhs->isIntegerType()) { 5186 // convert lhs to the rhs floating point type. 5187 return rhs; 5188 } 5189 if (lhs->isComplexIntegerType()) { 5190 // convert lhs to the complex floating point type. 5191 return getComplexType(rhs); 5192 } 5193 // We have two real floating types, float/complex combos were handled above. 5194 // Convert the smaller operand to the bigger result. 5195 int result = getFloatingTypeOrder(lhs, rhs); 5196 if (result > 0) // convert the rhs 5197 return lhs; 5198 assert(result < 0 && "illegal float comparison"); 5199 return rhs; // convert the lhs 5200 } 5201 if (lhs->isComplexIntegerType() || rhs->isComplexIntegerType()) { 5202 // Handle GCC complex int extension. 5203 const ComplexType *lhsComplexInt = lhs->getAsComplexIntegerType(); 5204 const ComplexType *rhsComplexInt = rhs->getAsComplexIntegerType(); 5205 5206 if (lhsComplexInt && rhsComplexInt) { 5207 if (getIntegerTypeOrder(lhsComplexInt->getElementType(), 5208 rhsComplexInt->getElementType()) >= 0) 5209 return lhs; // convert the rhs 5210 return rhs; 5211 } else if (lhsComplexInt && rhs->isIntegerType()) { 5212 // convert the rhs to the lhs complex type. 5213 return lhs; 5214 } else if (rhsComplexInt && lhs->isIntegerType()) { 5215 // convert the lhs to the rhs complex type. 5216 return rhs; 5217 } 5218 } 5219 // Finally, we have two differing integer types. 5220 // The rules for this case are in C99 6.3.1.8 5221 int compare = getIntegerTypeOrder(lhs, rhs); 5222 bool lhsSigned = lhs->isSignedIntegerType(), 5223 rhsSigned = rhs->isSignedIntegerType(); 5224 QualType destType; 5225 if (lhsSigned == rhsSigned) { 5226 // Same signedness; use the higher-ranked type 5227 destType = compare >= 0 ? lhs : rhs; 5228 } else if (compare != (lhsSigned ? 1 : -1)) { 5229 // The unsigned type has greater than or equal rank to the 5230 // signed type, so use the unsigned type 5231 destType = lhsSigned ? rhs : lhs; 5232 } else if (getIntWidth(lhs) != getIntWidth(rhs)) { 5233 // The two types are different widths; if we are here, that 5234 // means the signed type is larger than the unsigned type, so 5235 // use the signed type. 5236 destType = lhsSigned ? lhs : rhs; 5237 } else { 5238 // The signed type is higher-ranked than the unsigned type, 5239 // but isn't actually any bigger (like unsigned int and long 5240 // on most 32-bit systems). Use the unsigned type corresponding 5241 // to the signed type. 5242 destType = getCorrespondingUnsignedType(lhsSigned ? lhs : rhs); 5243 } 5244 return destType; 5245} 5246