ASTContext.cpp revision 465d41b92b2c862f3062c412a0538db65c6a2661
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/ExternalASTSource.h" 22#include "clang/AST/RecordLayout.h" 23#include "clang/Basic/Builtins.h" 24#include "clang/Basic/SourceManager.h" 25#include "clang/Basic/TargetInfo.h" 26#include "llvm/ADT/SmallString.h" 27#include "llvm/ADT/StringExtras.h" 28#include "llvm/Support/MathExtras.h" 29#include "llvm/Support/raw_ostream.h" 30#include "RecordLayoutBuilder.h" 31 32using namespace clang; 33 34enum FloatingRank { 35 FloatRank, DoubleRank, LongDoubleRank 36}; 37 38ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 39 const TargetInfo &t, 40 IdentifierTable &idents, SelectorTable &sels, 41 Builtin::Context &builtins, 42 bool FreeMem, unsigned size_reserve) : 43 GlobalNestedNameSpecifier(0), CFConstantStringTypeDecl(0), 44 NSConstantStringTypeDecl(0), 45 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 46 sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 47 SourceMgr(SM), LangOpts(LOpts), FreeMemory(FreeMem), Target(t), 48 Idents(idents), Selectors(sels), 49 BuiltinInfo(builtins), 50 DeclarationNames(*this), 51 ExternalSource(0), PrintingPolicy(LOpts), 52 LastSDM(0, 0) { 53 ObjCIdRedefinitionType = QualType(); 54 ObjCClassRedefinitionType = QualType(); 55 ObjCSelRedefinitionType = QualType(); 56 if (size_reserve > 0) Types.reserve(size_reserve); 57 TUDecl = TranslationUnitDecl::Create(*this); 58 InitBuiltinTypes(); 59} 60 61ASTContext::~ASTContext() { 62 // Release the DenseMaps associated with DeclContext objects. 63 // FIXME: Is this the ideal solution? 64 ReleaseDeclContextMaps(); 65 66 // Release all of the memory associated with overridden C++ methods. 67 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 68 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 69 OM != OMEnd; ++OM) 70 OM->second.Destroy(); 71 72 if (FreeMemory) { 73 // Deallocate all the types. 74 while (!Types.empty()) { 75 Types.back()->Destroy(*this); 76 Types.pop_back(); 77 } 78 79 for (llvm::FoldingSet<ExtQuals>::iterator 80 I = ExtQualNodes.begin(), E = ExtQualNodes.end(); I != E; ) { 81 // Increment in loop to prevent using deallocated memory. 82 Deallocate(&*I++); 83 } 84 85 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 86 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 87 // Increment in loop to prevent using deallocated memory. 88 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 89 R->Destroy(*this); 90 } 91 92 for (llvm::DenseMap<const ObjCContainerDecl*, 93 const ASTRecordLayout*>::iterator 94 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) { 95 // Increment in loop to prevent using deallocated memory. 96 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 97 R->Destroy(*this); 98 } 99 } 100 101 // Destroy nested-name-specifiers. 102 for (llvm::FoldingSet<NestedNameSpecifier>::iterator 103 NNS = NestedNameSpecifiers.begin(), 104 NNSEnd = NestedNameSpecifiers.end(); 105 NNS != NNSEnd; ) { 106 // Increment in loop to prevent using deallocated memory. 107 (*NNS++).Destroy(*this); 108 } 109 110 if (GlobalNestedNameSpecifier) 111 GlobalNestedNameSpecifier->Destroy(*this); 112 113 TUDecl->Destroy(*this); 114} 115 116void 117ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 118 ExternalSource.reset(Source.take()); 119} 120 121void ASTContext::PrintStats() const { 122 fprintf(stderr, "*** AST Context Stats:\n"); 123 fprintf(stderr, " %d types total.\n", (int)Types.size()); 124 125 unsigned counts[] = { 126#define TYPE(Name, Parent) 0, 127#define ABSTRACT_TYPE(Name, Parent) 128#include "clang/AST/TypeNodes.def" 129 0 // Extra 130 }; 131 132 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 133 Type *T = Types[i]; 134 counts[(unsigned)T->getTypeClass()]++; 135 } 136 137 unsigned Idx = 0; 138 unsigned TotalBytes = 0; 139#define TYPE(Name, Parent) \ 140 if (counts[Idx]) \ 141 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 142 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 143 ++Idx; 144#define ABSTRACT_TYPE(Name, Parent) 145#include "clang/AST/TypeNodes.def" 146 147 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 148 149 if (ExternalSource.get()) { 150 fprintf(stderr, "\n"); 151 ExternalSource->PrintStats(); 152 } 153} 154 155 156void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 157 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 158 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 159 Types.push_back(Ty); 160} 161 162void ASTContext::InitBuiltinTypes() { 163 assert(VoidTy.isNull() && "Context reinitialized?"); 164 165 // C99 6.2.5p19. 166 InitBuiltinType(VoidTy, BuiltinType::Void); 167 168 // C99 6.2.5p2. 169 InitBuiltinType(BoolTy, BuiltinType::Bool); 170 // C99 6.2.5p3. 171 if (LangOpts.CharIsSigned) 172 InitBuiltinType(CharTy, BuiltinType::Char_S); 173 else 174 InitBuiltinType(CharTy, BuiltinType::Char_U); 175 // C99 6.2.5p4. 176 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 177 InitBuiltinType(ShortTy, BuiltinType::Short); 178 InitBuiltinType(IntTy, BuiltinType::Int); 179 InitBuiltinType(LongTy, BuiltinType::Long); 180 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 181 182 // C99 6.2.5p6. 183 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 184 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 185 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 186 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 187 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 188 189 // C99 6.2.5p10. 190 InitBuiltinType(FloatTy, BuiltinType::Float); 191 InitBuiltinType(DoubleTy, BuiltinType::Double); 192 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 193 194 // GNU extension, 128-bit integers. 195 InitBuiltinType(Int128Ty, BuiltinType::Int128); 196 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 197 198 if (LangOpts.CPlusPlus) // C++ 3.9.1p5 199 InitBuiltinType(WCharTy, BuiltinType::WChar); 200 else // C99 201 WCharTy = getFromTargetType(Target.getWCharType()); 202 203 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 204 InitBuiltinType(Char16Ty, BuiltinType::Char16); 205 else // C99 206 Char16Ty = getFromTargetType(Target.getChar16Type()); 207 208 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 209 InitBuiltinType(Char32Ty, BuiltinType::Char32); 210 else // C99 211 Char32Ty = getFromTargetType(Target.getChar32Type()); 212 213 // Placeholder type for functions. 214 InitBuiltinType(OverloadTy, BuiltinType::Overload); 215 216 // Placeholder type for type-dependent expressions whose type is 217 // completely unknown. No code should ever check a type against 218 // DependentTy and users should never see it; however, it is here to 219 // help diagnose failures to properly check for type-dependent 220 // expressions. 221 InitBuiltinType(DependentTy, BuiltinType::Dependent); 222 223 // Placeholder type for C++0x auto declarations whose real type has 224 // not yet been deduced. 225 InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 226 227 // C99 6.2.5p11. 228 FloatComplexTy = getComplexType(FloatTy); 229 DoubleComplexTy = getComplexType(DoubleTy); 230 LongDoubleComplexTy = getComplexType(LongDoubleTy); 231 232 BuiltinVaListType = QualType(); 233 234 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 235 ObjCIdTypedefType = QualType(); 236 ObjCClassTypedefType = QualType(); 237 ObjCSelTypedefType = QualType(); 238 239 // Builtin types for 'id', 'Class', and 'SEL'. 240 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 241 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 242 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 243 244 ObjCConstantStringType = QualType(); 245 246 // void * type 247 VoidPtrTy = getPointerType(VoidTy); 248 249 // nullptr type (C++0x 2.14.7) 250 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 251} 252 253MemberSpecializationInfo * 254ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 255 assert(Var->isStaticDataMember() && "Not a static data member"); 256 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 257 = InstantiatedFromStaticDataMember.find(Var); 258 if (Pos == InstantiatedFromStaticDataMember.end()) 259 return 0; 260 261 return Pos->second; 262} 263 264void 265ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 266 TemplateSpecializationKind TSK) { 267 assert(Inst->isStaticDataMember() && "Not a static data member"); 268 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 269 assert(!InstantiatedFromStaticDataMember[Inst] && 270 "Already noted what static data member was instantiated from"); 271 InstantiatedFromStaticDataMember[Inst] 272 = new (*this) MemberSpecializationInfo(Tmpl, TSK); 273} 274 275NamedDecl * 276ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 277 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 278 = InstantiatedFromUsingDecl.find(UUD); 279 if (Pos == InstantiatedFromUsingDecl.end()) 280 return 0; 281 282 return Pos->second; 283} 284 285void 286ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 287 assert((isa<UsingDecl>(Pattern) || 288 isa<UnresolvedUsingValueDecl>(Pattern) || 289 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 290 "pattern decl is not a using decl"); 291 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 292 InstantiatedFromUsingDecl[Inst] = Pattern; 293} 294 295UsingShadowDecl * 296ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 297 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 298 = InstantiatedFromUsingShadowDecl.find(Inst); 299 if (Pos == InstantiatedFromUsingShadowDecl.end()) 300 return 0; 301 302 return Pos->second; 303} 304 305void 306ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 307 UsingShadowDecl *Pattern) { 308 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 309 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 310} 311 312FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 313 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 314 = InstantiatedFromUnnamedFieldDecl.find(Field); 315 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 316 return 0; 317 318 return Pos->second; 319} 320 321void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 322 FieldDecl *Tmpl) { 323 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 324 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 325 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 326 "Already noted what unnamed field was instantiated from"); 327 328 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 329} 330 331ASTContext::overridden_cxx_method_iterator 332ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 333 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 334 = OverriddenMethods.find(Method); 335 if (Pos == OverriddenMethods.end()) 336 return 0; 337 338 return Pos->second.begin(); 339} 340 341ASTContext::overridden_cxx_method_iterator 342ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 343 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 344 = OverriddenMethods.find(Method); 345 if (Pos == OverriddenMethods.end()) 346 return 0; 347 348 return Pos->second.end(); 349} 350 351void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 352 const CXXMethodDecl *Overridden) { 353 OverriddenMethods[Method].push_back(Overridden); 354} 355 356namespace { 357 class BeforeInTranslationUnit 358 : std::binary_function<SourceRange, SourceRange, bool> { 359 SourceManager *SourceMgr; 360 361 public: 362 explicit BeforeInTranslationUnit(SourceManager *SM) : SourceMgr(SM) { } 363 364 bool operator()(SourceRange X, SourceRange Y) { 365 return SourceMgr->isBeforeInTranslationUnit(X.getBegin(), Y.getBegin()); 366 } 367 }; 368} 369 370//===----------------------------------------------------------------------===// 371// Type Sizing and Analysis 372//===----------------------------------------------------------------------===// 373 374/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 375/// scalar floating point type. 376const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 377 const BuiltinType *BT = T->getAs<BuiltinType>(); 378 assert(BT && "Not a floating point type!"); 379 switch (BT->getKind()) { 380 default: assert(0 && "Not a floating point type!"); 381 case BuiltinType::Float: return Target.getFloatFormat(); 382 case BuiltinType::Double: return Target.getDoubleFormat(); 383 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 384 } 385} 386 387/// getDeclAlign - Return a conservative estimate of the alignment of the 388/// specified decl. Note that bitfields do not have a valid alignment, so 389/// this method will assert on them. 390/// If @p RefAsPointee, references are treated like their underlying type 391/// (for alignof), else they're treated like pointers (for CodeGen). 392CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) { 393 unsigned Align = Target.getCharWidth(); 394 395 if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 396 Align = std::max(Align, AA->getMaxAlignment()); 397 398 if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 399 QualType T = VD->getType(); 400 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 401 if (RefAsPointee) 402 T = RT->getPointeeType(); 403 else 404 T = getPointerType(RT->getPointeeType()); 405 } 406 if (!T->isIncompleteType() && !T->isFunctionType()) { 407 // Incomplete or function types default to 1. 408 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 409 T = cast<ArrayType>(T)->getElementType(); 410 411 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 412 } 413 if (const FieldDecl *FD = dyn_cast<FieldDecl>(VD)) { 414 // In the case of a field in a packed struct, we want the minimum 415 // of the alignment of the field and the alignment of the struct. 416 Align = std::min(Align, 417 getPreferredTypeAlign(FD->getParent()->getTypeForDecl())); 418 } 419 } 420 421 return CharUnits::fromQuantity(Align / Target.getCharWidth()); 422} 423 424/// getTypeSize - Return the size of the specified type, in bits. This method 425/// does not work on incomplete types. 426/// 427/// FIXME: Pointers into different addr spaces could have different sizes and 428/// alignment requirements: getPointerInfo should take an AddrSpace, this 429/// should take a QualType, &c. 430std::pair<uint64_t, unsigned> 431ASTContext::getTypeInfo(const Type *T) { 432 uint64_t Width=0; 433 unsigned Align=8; 434 switch (T->getTypeClass()) { 435#define TYPE(Class, Base) 436#define ABSTRACT_TYPE(Class, Base) 437#define NON_CANONICAL_TYPE(Class, Base) 438#define DEPENDENT_TYPE(Class, Base) case Type::Class: 439#include "clang/AST/TypeNodes.def" 440 assert(false && "Should not see dependent types"); 441 break; 442 443 case Type::FunctionNoProto: 444 case Type::FunctionProto: 445 // GCC extension: alignof(function) = 32 bits 446 Width = 0; 447 Align = 32; 448 break; 449 450 case Type::IncompleteArray: 451 case Type::VariableArray: 452 Width = 0; 453 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 454 break; 455 456 case Type::ConstantArray: { 457 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 458 459 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 460 Width = EltInfo.first*CAT->getSize().getZExtValue(); 461 Align = EltInfo.second; 462 break; 463 } 464 case Type::ExtVector: 465 case Type::Vector: { 466 const VectorType *VT = cast<VectorType>(T); 467 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 468 Width = EltInfo.first*VT->getNumElements(); 469 Align = Width; 470 // If the alignment is not a power of 2, round up to the next power of 2. 471 // This happens for non-power-of-2 length vectors. 472 if (Align & (Align-1)) { 473 Align = llvm::NextPowerOf2(Align); 474 Width = llvm::RoundUpToAlignment(Width, Align); 475 } 476 break; 477 } 478 479 case Type::Builtin: 480 switch (cast<BuiltinType>(T)->getKind()) { 481 default: assert(0 && "Unknown builtin type!"); 482 case BuiltinType::Void: 483 // GCC extension: alignof(void) = 8 bits. 484 Width = 0; 485 Align = 8; 486 break; 487 488 case BuiltinType::Bool: 489 Width = Target.getBoolWidth(); 490 Align = Target.getBoolAlign(); 491 break; 492 case BuiltinType::Char_S: 493 case BuiltinType::Char_U: 494 case BuiltinType::UChar: 495 case BuiltinType::SChar: 496 Width = Target.getCharWidth(); 497 Align = Target.getCharAlign(); 498 break; 499 case BuiltinType::WChar: 500 Width = Target.getWCharWidth(); 501 Align = Target.getWCharAlign(); 502 break; 503 case BuiltinType::Char16: 504 Width = Target.getChar16Width(); 505 Align = Target.getChar16Align(); 506 break; 507 case BuiltinType::Char32: 508 Width = Target.getChar32Width(); 509 Align = Target.getChar32Align(); 510 break; 511 case BuiltinType::UShort: 512 case BuiltinType::Short: 513 Width = Target.getShortWidth(); 514 Align = Target.getShortAlign(); 515 break; 516 case BuiltinType::UInt: 517 case BuiltinType::Int: 518 Width = Target.getIntWidth(); 519 Align = Target.getIntAlign(); 520 break; 521 case BuiltinType::ULong: 522 case BuiltinType::Long: 523 Width = Target.getLongWidth(); 524 Align = Target.getLongAlign(); 525 break; 526 case BuiltinType::ULongLong: 527 case BuiltinType::LongLong: 528 Width = Target.getLongLongWidth(); 529 Align = Target.getLongLongAlign(); 530 break; 531 case BuiltinType::Int128: 532 case BuiltinType::UInt128: 533 Width = 128; 534 Align = 128; // int128_t is 128-bit aligned on all targets. 535 break; 536 case BuiltinType::Float: 537 Width = Target.getFloatWidth(); 538 Align = Target.getFloatAlign(); 539 break; 540 case BuiltinType::Double: 541 Width = Target.getDoubleWidth(); 542 Align = Target.getDoubleAlign(); 543 break; 544 case BuiltinType::LongDouble: 545 Width = Target.getLongDoubleWidth(); 546 Align = Target.getLongDoubleAlign(); 547 break; 548 case BuiltinType::NullPtr: 549 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 550 Align = Target.getPointerAlign(0); // == sizeof(void*) 551 break; 552 } 553 break; 554 case Type::ObjCObjectPointer: 555 Width = Target.getPointerWidth(0); 556 Align = Target.getPointerAlign(0); 557 break; 558 case Type::BlockPointer: { 559 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 560 Width = Target.getPointerWidth(AS); 561 Align = Target.getPointerAlign(AS); 562 break; 563 } 564 case Type::LValueReference: 565 case Type::RValueReference: { 566 // alignof and sizeof should never enter this code path here, so we go 567 // the pointer route. 568 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 569 Width = Target.getPointerWidth(AS); 570 Align = Target.getPointerAlign(AS); 571 break; 572 } 573 case Type::Pointer: { 574 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 575 Width = Target.getPointerWidth(AS); 576 Align = Target.getPointerAlign(AS); 577 break; 578 } 579 case Type::MemberPointer: { 580 QualType Pointee = cast<MemberPointerType>(T)->getPointeeType(); 581 std::pair<uint64_t, unsigned> PtrDiffInfo = 582 getTypeInfo(getPointerDiffType()); 583 Width = PtrDiffInfo.first; 584 if (Pointee->isFunctionType()) 585 Width *= 2; 586 Align = PtrDiffInfo.second; 587 break; 588 } 589 case Type::Complex: { 590 // Complex types have the same alignment as their elements, but twice the 591 // size. 592 std::pair<uint64_t, unsigned> EltInfo = 593 getTypeInfo(cast<ComplexType>(T)->getElementType()); 594 Width = EltInfo.first*2; 595 Align = EltInfo.second; 596 break; 597 } 598 case Type::ObjCInterface: { 599 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 600 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 601 Width = Layout.getSize(); 602 Align = Layout.getAlignment(); 603 break; 604 } 605 case Type::Record: 606 case Type::Enum: { 607 const TagType *TT = cast<TagType>(T); 608 609 if (TT->getDecl()->isInvalidDecl()) { 610 Width = 1; 611 Align = 1; 612 break; 613 } 614 615 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 616 return getTypeInfo(ET->getDecl()->getIntegerType()); 617 618 const RecordType *RT = cast<RecordType>(TT); 619 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 620 Width = Layout.getSize(); 621 Align = Layout.getAlignment(); 622 break; 623 } 624 625 case Type::SubstTemplateTypeParm: 626 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 627 getReplacementType().getTypePtr()); 628 629 case Type::Typedef: { 630 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 631 if (const AlignedAttr *Aligned = Typedef->getAttr<AlignedAttr>()) { 632 Align = std::max(Aligned->getMaxAlignment(), 633 getTypeAlign(Typedef->getUnderlyingType().getTypePtr())); 634 Width = getTypeSize(Typedef->getUnderlyingType().getTypePtr()); 635 } else 636 return getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 637 break; 638 } 639 640 case Type::TypeOfExpr: 641 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 642 .getTypePtr()); 643 644 case Type::TypeOf: 645 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 646 647 case Type::Decltype: 648 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 649 .getTypePtr()); 650 651 case Type::Elaborated: 652 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 653 654 case Type::TemplateSpecialization: 655 assert(getCanonicalType(T) != T && 656 "Cannot request the size of a dependent type"); 657 // FIXME: this is likely to be wrong once we support template 658 // aliases, since a template alias could refer to a typedef that 659 // has an __aligned__ attribute on it. 660 return getTypeInfo(getCanonicalType(T)); 661 } 662 663 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 664 return std::make_pair(Width, Align); 665} 666 667/// getTypeSizeInChars - Return the size of the specified type, in characters. 668/// This method does not work on incomplete types. 669CharUnits ASTContext::getTypeSizeInChars(QualType T) { 670 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 671} 672CharUnits ASTContext::getTypeSizeInChars(const Type *T) { 673 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 674} 675 676/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 677/// characters. This method does not work on incomplete types. 678CharUnits ASTContext::getTypeAlignInChars(QualType T) { 679 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 680} 681CharUnits ASTContext::getTypeAlignInChars(const Type *T) { 682 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 683} 684 685/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 686/// type for the current target in bits. This can be different than the ABI 687/// alignment in cases where it is beneficial for performance to overalign 688/// a data type. 689unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 690 unsigned ABIAlign = getTypeAlign(T); 691 692 // Double and long long should be naturally aligned if possible. 693 if (const ComplexType* CT = T->getAs<ComplexType>()) 694 T = CT->getElementType().getTypePtr(); 695 if (T->isSpecificBuiltinType(BuiltinType::Double) || 696 T->isSpecificBuiltinType(BuiltinType::LongLong)) 697 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 698 699 return ABIAlign; 700} 701 702static void CollectLocalObjCIvars(ASTContext *Ctx, 703 const ObjCInterfaceDecl *OI, 704 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 705 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 706 E = OI->ivar_end(); I != E; ++I) { 707 ObjCIvarDecl *IVDecl = *I; 708 if (!IVDecl->isInvalidDecl()) 709 Fields.push_back(cast<FieldDecl>(IVDecl)); 710 } 711} 712 713void ASTContext::CollectObjCIvars(const ObjCInterfaceDecl *OI, 714 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 715 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 716 CollectObjCIvars(SuperClass, Fields); 717 CollectLocalObjCIvars(this, OI, Fields); 718} 719 720/// ShallowCollectObjCIvars - 721/// Collect all ivars, including those synthesized, in the current class. 722/// 723void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 724 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 725 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 726 E = OI->ivar_end(); I != E; ++I) { 727 Ivars.push_back(*I); 728 } 729 730 CollectNonClassIvars(OI, Ivars); 731} 732 733/// CollectNonClassIvars - 734/// This routine collects all other ivars which are not declared in the class. 735/// This includes synthesized ivars (via @synthesize) and those in 736// class's @implementation. 737/// 738void ASTContext::CollectNonClassIvars(const ObjCInterfaceDecl *OI, 739 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 740 // Find ivars declared in class extension. 741 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) { 742 for (ObjCCategoryDecl::ivar_iterator I = CDecl->ivar_begin(), 743 E = CDecl->ivar_end(); I != E; ++I) { 744 Ivars.push_back(*I); 745 } 746 } 747 748 // Also add any ivar defined in this class's implementation. This 749 // includes synthesized ivars. 750 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) { 751 for (ObjCImplementationDecl::ivar_iterator I = ImplDecl->ivar_begin(), 752 E = ImplDecl->ivar_end(); I != E; ++I) 753 Ivars.push_back(*I); 754 } 755} 756 757/// CollectInheritedProtocols - Collect all protocols in current class and 758/// those inherited by it. 759void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 760 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 761 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 762 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 763 PE = OI->protocol_end(); P != PE; ++P) { 764 ObjCProtocolDecl *Proto = (*P); 765 Protocols.insert(Proto); 766 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 767 PE = Proto->protocol_end(); P != PE; ++P) { 768 Protocols.insert(*P); 769 CollectInheritedProtocols(*P, Protocols); 770 } 771 } 772 773 // Categories of this Interface. 774 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 775 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 776 CollectInheritedProtocols(CDeclChain, Protocols); 777 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 778 while (SD) { 779 CollectInheritedProtocols(SD, Protocols); 780 SD = SD->getSuperClass(); 781 } 782 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 783 for (ObjCInterfaceDecl::protocol_iterator P = OC->protocol_begin(), 784 PE = OC->protocol_end(); P != PE; ++P) { 785 ObjCProtocolDecl *Proto = (*P); 786 Protocols.insert(Proto); 787 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 788 PE = Proto->protocol_end(); P != PE; ++P) 789 CollectInheritedProtocols(*P, Protocols); 790 } 791 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 792 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 793 PE = OP->protocol_end(); P != PE; ++P) { 794 ObjCProtocolDecl *Proto = (*P); 795 Protocols.insert(Proto); 796 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 797 PE = Proto->protocol_end(); P != PE; ++P) 798 CollectInheritedProtocols(*P, Protocols); 799 } 800 } 801} 802 803unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) { 804 unsigned count = 0; 805 // Count ivars declared in class extension. 806 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) 807 count += CDecl->ivar_size(); 808 809 // Count ivar defined in this class's implementation. This 810 // includes synthesized ivars. 811 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 812 count += ImplDecl->ivar_size(); 813 814 return count; 815} 816 817/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 818ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 819 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 820 I = ObjCImpls.find(D); 821 if (I != ObjCImpls.end()) 822 return cast<ObjCImplementationDecl>(I->second); 823 return 0; 824} 825/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 826ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 827 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 828 I = ObjCImpls.find(D); 829 if (I != ObjCImpls.end()) 830 return cast<ObjCCategoryImplDecl>(I->second); 831 return 0; 832} 833 834/// \brief Set the implementation of ObjCInterfaceDecl. 835void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 836 ObjCImplementationDecl *ImplD) { 837 assert(IFaceD && ImplD && "Passed null params"); 838 ObjCImpls[IFaceD] = ImplD; 839} 840/// \brief Set the implementation of ObjCCategoryDecl. 841void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 842 ObjCCategoryImplDecl *ImplD) { 843 assert(CatD && ImplD && "Passed null params"); 844 ObjCImpls[CatD] = ImplD; 845} 846 847/// \brief Allocate an uninitialized TypeSourceInfo. 848/// 849/// The caller should initialize the memory held by TypeSourceInfo using 850/// the TypeLoc wrappers. 851/// 852/// \param T the type that will be the basis for type source info. This type 853/// should refer to how the declarator was written in source code, not to 854/// what type semantic analysis resolved the declarator to. 855TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 856 unsigned DataSize) { 857 if (!DataSize) 858 DataSize = TypeLoc::getFullDataSizeForType(T); 859 else 860 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 861 "incorrect data size provided to CreateTypeSourceInfo!"); 862 863 TypeSourceInfo *TInfo = 864 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 865 new (TInfo) TypeSourceInfo(T); 866 return TInfo; 867} 868 869TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 870 SourceLocation L) { 871 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 872 DI->getTypeLoc().initialize(L); 873 return DI; 874} 875 876/// getInterfaceLayoutImpl - Get or compute information about the 877/// layout of the given interface. 878/// 879/// \param Impl - If given, also include the layout of the interface's 880/// implementation. This may differ by including synthesized ivars. 881const ASTRecordLayout & 882ASTContext::getObjCLayout(const ObjCInterfaceDecl *D, 883 const ObjCImplementationDecl *Impl) { 884 assert(!D->isForwardDecl() && "Invalid interface decl!"); 885 886 // Look up this layout, if already laid out, return what we have. 887 ObjCContainerDecl *Key = 888 Impl ? (ObjCContainerDecl*) Impl : (ObjCContainerDecl*) D; 889 if (const ASTRecordLayout *Entry = ObjCLayouts[Key]) 890 return *Entry; 891 892 // Add in synthesized ivar count if laying out an implementation. 893 if (Impl) { 894 unsigned SynthCount = CountNonClassIvars(D); 895 // If there aren't any sythesized ivars then reuse the interface 896 // entry. Note we can't cache this because we simply free all 897 // entries later; however we shouldn't look up implementations 898 // frequently. 899 if (SynthCount == 0) 900 return getObjCLayout(D, 0); 901 } 902 903 const ASTRecordLayout *NewEntry = 904 ASTRecordLayoutBuilder::ComputeLayout(*this, D, Impl); 905 ObjCLayouts[Key] = NewEntry; 906 907 return *NewEntry; 908} 909 910const ASTRecordLayout & 911ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 912 return getObjCLayout(D, 0); 913} 914 915const ASTRecordLayout & 916ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 917 return getObjCLayout(D->getClassInterface(), D); 918} 919 920/// getASTRecordLayout - Get or compute information about the layout of the 921/// specified record (struct/union/class), which indicates its size and field 922/// position information. 923const ASTRecordLayout &ASTContext::getASTRecordLayout(const RecordDecl *D) { 924 D = D->getDefinition(); 925 assert(D && "Cannot get layout of forward declarations!"); 926 927 // Look up this layout, if already laid out, return what we have. 928 // Note that we can't save a reference to the entry because this function 929 // is recursive. 930 const ASTRecordLayout *Entry = ASTRecordLayouts[D]; 931 if (Entry) return *Entry; 932 933 const ASTRecordLayout *NewEntry = 934 ASTRecordLayoutBuilder::ComputeLayout(*this, D); 935 ASTRecordLayouts[D] = NewEntry; 936 937 if (getLangOptions().DumpRecordLayouts) { 938 llvm::errs() << "\n*** Dumping AST Record Layout\n"; 939 DumpRecordLayout(D, llvm::errs()); 940 } 941 942 return *NewEntry; 943} 944 945const CXXMethodDecl *ASTContext::getKeyFunction(const CXXRecordDecl *RD) { 946 RD = cast<CXXRecordDecl>(RD->getDefinition()); 947 assert(RD && "Cannot get key function for forward declarations!"); 948 949 const CXXMethodDecl *&Entry = KeyFunctions[RD]; 950 if (!Entry) 951 Entry = ASTRecordLayoutBuilder::ComputeKeyFunction(RD); 952 else 953 assert(Entry == ASTRecordLayoutBuilder::ComputeKeyFunction(RD) && 954 "Key function changed!"); 955 956 return Entry; 957} 958 959//===----------------------------------------------------------------------===// 960// Type creation/memoization methods 961//===----------------------------------------------------------------------===// 962 963QualType ASTContext::getExtQualType(const Type *TypeNode, Qualifiers Quals) { 964 unsigned Fast = Quals.getFastQualifiers(); 965 Quals.removeFastQualifiers(); 966 967 // Check if we've already instantiated this type. 968 llvm::FoldingSetNodeID ID; 969 ExtQuals::Profile(ID, TypeNode, Quals); 970 void *InsertPos = 0; 971 if (ExtQuals *EQ = ExtQualNodes.FindNodeOrInsertPos(ID, InsertPos)) { 972 assert(EQ->getQualifiers() == Quals); 973 QualType T = QualType(EQ, Fast); 974 return T; 975 } 976 977 ExtQuals *New = new (*this, TypeAlignment) ExtQuals(*this, TypeNode, Quals); 978 ExtQualNodes.InsertNode(New, InsertPos); 979 QualType T = QualType(New, Fast); 980 return T; 981} 982 983QualType ASTContext::getVolatileType(QualType T) { 984 QualType CanT = getCanonicalType(T); 985 if (CanT.isVolatileQualified()) return T; 986 987 QualifierCollector Quals; 988 const Type *TypeNode = Quals.strip(T); 989 Quals.addVolatile(); 990 991 return getExtQualType(TypeNode, Quals); 992} 993 994QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 995 QualType CanT = getCanonicalType(T); 996 if (CanT.getAddressSpace() == AddressSpace) 997 return T; 998 999 // If we are composing extended qualifiers together, merge together 1000 // into one ExtQuals node. 1001 QualifierCollector Quals; 1002 const Type *TypeNode = Quals.strip(T); 1003 1004 // If this type already has an address space specified, it cannot get 1005 // another one. 1006 assert(!Quals.hasAddressSpace() && 1007 "Type cannot be in multiple addr spaces!"); 1008 Quals.addAddressSpace(AddressSpace); 1009 1010 return getExtQualType(TypeNode, Quals); 1011} 1012 1013QualType ASTContext::getObjCGCQualType(QualType T, 1014 Qualifiers::GC GCAttr) { 1015 QualType CanT = getCanonicalType(T); 1016 if (CanT.getObjCGCAttr() == GCAttr) 1017 return T; 1018 1019 if (T->isPointerType()) { 1020 QualType Pointee = T->getAs<PointerType>()->getPointeeType(); 1021 if (Pointee->isAnyPointerType()) { 1022 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1023 return getPointerType(ResultType); 1024 } 1025 } 1026 1027 // If we are composing extended qualifiers together, merge together 1028 // into one ExtQuals node. 1029 QualifierCollector Quals; 1030 const Type *TypeNode = Quals.strip(T); 1031 1032 // If this type already has an ObjCGC specified, it cannot get 1033 // another one. 1034 assert(!Quals.hasObjCGCAttr() && 1035 "Type cannot have multiple ObjCGCs!"); 1036 Quals.addObjCGCAttr(GCAttr); 1037 1038 return getExtQualType(TypeNode, Quals); 1039} 1040 1041static QualType getExtFunctionType(ASTContext& Context, QualType T, 1042 const FunctionType::ExtInfo &Info) { 1043 QualType ResultType; 1044 if (const PointerType *Pointer = T->getAs<PointerType>()) { 1045 QualType Pointee = Pointer->getPointeeType(); 1046 ResultType = getExtFunctionType(Context, Pointee, Info); 1047 if (ResultType == Pointee) 1048 return T; 1049 1050 ResultType = Context.getPointerType(ResultType); 1051 } else if (const BlockPointerType *BlockPointer 1052 = T->getAs<BlockPointerType>()) { 1053 QualType Pointee = BlockPointer->getPointeeType(); 1054 ResultType = getExtFunctionType(Context, Pointee, Info); 1055 if (ResultType == Pointee) 1056 return T; 1057 1058 ResultType = Context.getBlockPointerType(ResultType); 1059 } else if (const FunctionType *F = T->getAs<FunctionType>()) { 1060 if (F->getExtInfo() == Info) 1061 return T; 1062 1063 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(F)) { 1064 ResultType = Context.getFunctionNoProtoType(FNPT->getResultType(), 1065 Info); 1066 } else { 1067 const FunctionProtoType *FPT = cast<FunctionProtoType>(F); 1068 ResultType 1069 = Context.getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1070 FPT->getNumArgs(), FPT->isVariadic(), 1071 FPT->getTypeQuals(), 1072 FPT->hasExceptionSpec(), 1073 FPT->hasAnyExceptionSpec(), 1074 FPT->getNumExceptions(), 1075 FPT->exception_begin(), 1076 Info); 1077 } 1078 } else 1079 return T; 1080 1081 return Context.getQualifiedType(ResultType, T.getLocalQualifiers()); 1082} 1083 1084QualType ASTContext::getNoReturnType(QualType T, bool AddNoReturn) { 1085 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1086 return getExtFunctionType(*this, T, 1087 Info.withNoReturn(AddNoReturn)); 1088} 1089 1090QualType ASTContext::getCallConvType(QualType T, CallingConv CallConv) { 1091 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1092 return getExtFunctionType(*this, T, 1093 Info.withCallingConv(CallConv)); 1094} 1095 1096QualType ASTContext::getRegParmType(QualType T, unsigned RegParm) { 1097 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1098 return getExtFunctionType(*this, T, 1099 Info.withRegParm(RegParm)); 1100} 1101 1102/// getComplexType - Return the uniqued reference to the type for a complex 1103/// number with the specified element type. 1104QualType ASTContext::getComplexType(QualType T) { 1105 // Unique pointers, to guarantee there is only one pointer of a particular 1106 // structure. 1107 llvm::FoldingSetNodeID ID; 1108 ComplexType::Profile(ID, T); 1109 1110 void *InsertPos = 0; 1111 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1112 return QualType(CT, 0); 1113 1114 // If the pointee type isn't canonical, this won't be a canonical type either, 1115 // so fill in the canonical type field. 1116 QualType Canonical; 1117 if (!T.isCanonical()) { 1118 Canonical = getComplexType(getCanonicalType(T)); 1119 1120 // Get the new insert position for the node we care about. 1121 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1122 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1123 } 1124 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1125 Types.push_back(New); 1126 ComplexTypes.InsertNode(New, InsertPos); 1127 return QualType(New, 0); 1128} 1129 1130/// getPointerType - Return the uniqued reference to the type for a pointer to 1131/// the specified type. 1132QualType ASTContext::getPointerType(QualType T) { 1133 // Unique pointers, to guarantee there is only one pointer of a particular 1134 // structure. 1135 llvm::FoldingSetNodeID ID; 1136 PointerType::Profile(ID, T); 1137 1138 void *InsertPos = 0; 1139 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1140 return QualType(PT, 0); 1141 1142 // If the pointee type isn't canonical, this won't be a canonical type either, 1143 // so fill in the canonical type field. 1144 QualType Canonical; 1145 if (!T.isCanonical()) { 1146 Canonical = getPointerType(getCanonicalType(T)); 1147 1148 // Get the new insert position for the node we care about. 1149 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1150 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1151 } 1152 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1153 Types.push_back(New); 1154 PointerTypes.InsertNode(New, InsertPos); 1155 return QualType(New, 0); 1156} 1157 1158/// getBlockPointerType - Return the uniqued reference to the type for 1159/// a pointer to the specified block. 1160QualType ASTContext::getBlockPointerType(QualType T) { 1161 assert(T->isFunctionType() && "block of function types only"); 1162 // Unique pointers, to guarantee there is only one block of a particular 1163 // structure. 1164 llvm::FoldingSetNodeID ID; 1165 BlockPointerType::Profile(ID, T); 1166 1167 void *InsertPos = 0; 1168 if (BlockPointerType *PT = 1169 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1170 return QualType(PT, 0); 1171 1172 // If the block pointee type isn't canonical, this won't be a canonical 1173 // type either so fill in the canonical type field. 1174 QualType Canonical; 1175 if (!T.isCanonical()) { 1176 Canonical = getBlockPointerType(getCanonicalType(T)); 1177 1178 // Get the new insert position for the node we care about. 1179 BlockPointerType *NewIP = 1180 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1181 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1182 } 1183 BlockPointerType *New 1184 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1185 Types.push_back(New); 1186 BlockPointerTypes.InsertNode(New, InsertPos); 1187 return QualType(New, 0); 1188} 1189 1190/// getLValueReferenceType - Return the uniqued reference to the type for an 1191/// lvalue reference to the specified type. 1192QualType ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) { 1193 // Unique pointers, to guarantee there is only one pointer of a particular 1194 // structure. 1195 llvm::FoldingSetNodeID ID; 1196 ReferenceType::Profile(ID, T, SpelledAsLValue); 1197 1198 void *InsertPos = 0; 1199 if (LValueReferenceType *RT = 1200 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1201 return QualType(RT, 0); 1202 1203 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1204 1205 // If the referencee type isn't canonical, this won't be a canonical type 1206 // either, so fill in the canonical type field. 1207 QualType Canonical; 1208 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1209 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1210 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1211 1212 // Get the new insert position for the node we care about. 1213 LValueReferenceType *NewIP = 1214 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1215 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1216 } 1217 1218 LValueReferenceType *New 1219 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1220 SpelledAsLValue); 1221 Types.push_back(New); 1222 LValueReferenceTypes.InsertNode(New, InsertPos); 1223 1224 return QualType(New, 0); 1225} 1226 1227/// getRValueReferenceType - Return the uniqued reference to the type for an 1228/// rvalue reference to the specified type. 1229QualType ASTContext::getRValueReferenceType(QualType T) { 1230 // Unique pointers, to guarantee there is only one pointer of a particular 1231 // structure. 1232 llvm::FoldingSetNodeID ID; 1233 ReferenceType::Profile(ID, T, false); 1234 1235 void *InsertPos = 0; 1236 if (RValueReferenceType *RT = 1237 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1238 return QualType(RT, 0); 1239 1240 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1241 1242 // If the referencee type isn't canonical, this won't be a canonical type 1243 // either, so fill in the canonical type field. 1244 QualType Canonical; 1245 if (InnerRef || !T.isCanonical()) { 1246 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1247 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1248 1249 // Get the new insert position for the node we care about. 1250 RValueReferenceType *NewIP = 1251 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1252 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1253 } 1254 1255 RValueReferenceType *New 1256 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1257 Types.push_back(New); 1258 RValueReferenceTypes.InsertNode(New, InsertPos); 1259 return QualType(New, 0); 1260} 1261 1262/// getMemberPointerType - Return the uniqued reference to the type for a 1263/// member pointer to the specified type, in the specified class. 1264QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) { 1265 // Unique pointers, to guarantee there is only one pointer of a particular 1266 // structure. 1267 llvm::FoldingSetNodeID ID; 1268 MemberPointerType::Profile(ID, T, Cls); 1269 1270 void *InsertPos = 0; 1271 if (MemberPointerType *PT = 1272 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1273 return QualType(PT, 0); 1274 1275 // If the pointee or class type isn't canonical, this won't be a canonical 1276 // type either, so fill in the canonical type field. 1277 QualType Canonical; 1278 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1279 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1280 1281 // Get the new insert position for the node we care about. 1282 MemberPointerType *NewIP = 1283 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1284 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1285 } 1286 MemberPointerType *New 1287 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1288 Types.push_back(New); 1289 MemberPointerTypes.InsertNode(New, InsertPos); 1290 return QualType(New, 0); 1291} 1292 1293/// getConstantArrayType - Return the unique reference to the type for an 1294/// array of the specified element type. 1295QualType ASTContext::getConstantArrayType(QualType EltTy, 1296 const llvm::APInt &ArySizeIn, 1297 ArrayType::ArraySizeModifier ASM, 1298 unsigned EltTypeQuals) { 1299 assert((EltTy->isDependentType() || 1300 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1301 "Constant array of VLAs is illegal!"); 1302 1303 // Convert the array size into a canonical width matching the pointer size for 1304 // the target. 1305 llvm::APInt ArySize(ArySizeIn); 1306 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1307 1308 llvm::FoldingSetNodeID ID; 1309 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1310 1311 void *InsertPos = 0; 1312 if (ConstantArrayType *ATP = 1313 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1314 return QualType(ATP, 0); 1315 1316 // If the element type isn't canonical, this won't be a canonical type either, 1317 // so fill in the canonical type field. 1318 QualType Canonical; 1319 if (!EltTy.isCanonical()) { 1320 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1321 ASM, EltTypeQuals); 1322 // Get the new insert position for the node we care about. 1323 ConstantArrayType *NewIP = 1324 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1325 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1326 } 1327 1328 ConstantArrayType *New = new(*this,TypeAlignment) 1329 ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1330 ConstantArrayTypes.InsertNode(New, InsertPos); 1331 Types.push_back(New); 1332 return QualType(New, 0); 1333} 1334 1335/// getVariableArrayType - Returns a non-unique reference to the type for a 1336/// variable array of the specified element type. 1337QualType ASTContext::getVariableArrayType(QualType EltTy, 1338 Expr *NumElts, 1339 ArrayType::ArraySizeModifier ASM, 1340 unsigned EltTypeQuals, 1341 SourceRange Brackets) { 1342 // Since we don't unique expressions, it isn't possible to unique VLA's 1343 // that have an expression provided for their size. 1344 1345 VariableArrayType *New = new(*this, TypeAlignment) 1346 VariableArrayType(EltTy, QualType(), NumElts, ASM, EltTypeQuals, Brackets); 1347 1348 VariableArrayTypes.push_back(New); 1349 Types.push_back(New); 1350 return QualType(New, 0); 1351} 1352 1353/// getDependentSizedArrayType - Returns a non-unique reference to 1354/// the type for a dependently-sized array of the specified element 1355/// type. 1356QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1357 Expr *NumElts, 1358 ArrayType::ArraySizeModifier ASM, 1359 unsigned EltTypeQuals, 1360 SourceRange Brackets) { 1361 assert((!NumElts || NumElts->isTypeDependent() || 1362 NumElts->isValueDependent()) && 1363 "Size must be type- or value-dependent!"); 1364 1365 void *InsertPos = 0; 1366 DependentSizedArrayType *Canon = 0; 1367 llvm::FoldingSetNodeID ID; 1368 1369 if (NumElts) { 1370 // Dependently-sized array types that do not have a specified 1371 // number of elements will have their sizes deduced from an 1372 // initializer. 1373 DependentSizedArrayType::Profile(ID, *this, getCanonicalType(EltTy), ASM, 1374 EltTypeQuals, NumElts); 1375 1376 Canon = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1377 } 1378 1379 DependentSizedArrayType *New; 1380 if (Canon) { 1381 // We already have a canonical version of this array type; use it as 1382 // the canonical type for a newly-built type. 1383 New = new (*this, TypeAlignment) 1384 DependentSizedArrayType(*this, EltTy, QualType(Canon, 0), 1385 NumElts, ASM, EltTypeQuals, Brackets); 1386 } else { 1387 QualType CanonEltTy = getCanonicalType(EltTy); 1388 if (CanonEltTy == EltTy) { 1389 New = new (*this, TypeAlignment) 1390 DependentSizedArrayType(*this, EltTy, QualType(), 1391 NumElts, ASM, EltTypeQuals, Brackets); 1392 1393 if (NumElts) { 1394 DependentSizedArrayType *CanonCheck 1395 = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1396 assert(!CanonCheck && "Dependent-sized canonical array type broken"); 1397 (void)CanonCheck; 1398 DependentSizedArrayTypes.InsertNode(New, InsertPos); 1399 } 1400 } else { 1401 QualType Canon = getDependentSizedArrayType(CanonEltTy, NumElts, 1402 ASM, EltTypeQuals, 1403 SourceRange()); 1404 New = new (*this, TypeAlignment) 1405 DependentSizedArrayType(*this, EltTy, Canon, 1406 NumElts, ASM, EltTypeQuals, Brackets); 1407 } 1408 } 1409 1410 Types.push_back(New); 1411 return QualType(New, 0); 1412} 1413 1414QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1415 ArrayType::ArraySizeModifier ASM, 1416 unsigned EltTypeQuals) { 1417 llvm::FoldingSetNodeID ID; 1418 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1419 1420 void *InsertPos = 0; 1421 if (IncompleteArrayType *ATP = 1422 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1423 return QualType(ATP, 0); 1424 1425 // If the element type isn't canonical, this won't be a canonical type 1426 // either, so fill in the canonical type field. 1427 QualType Canonical; 1428 1429 if (!EltTy.isCanonical()) { 1430 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1431 ASM, EltTypeQuals); 1432 1433 // Get the new insert position for the node we care about. 1434 IncompleteArrayType *NewIP = 1435 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1436 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1437 } 1438 1439 IncompleteArrayType *New = new (*this, TypeAlignment) 1440 IncompleteArrayType(EltTy, Canonical, ASM, EltTypeQuals); 1441 1442 IncompleteArrayTypes.InsertNode(New, InsertPos); 1443 Types.push_back(New); 1444 return QualType(New, 0); 1445} 1446 1447/// getVectorType - Return the unique reference to a vector type of 1448/// the specified element type and size. VectorType must be a built-in type. 1449QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1450 bool IsAltiVec, bool IsPixel) { 1451 BuiltinType *baseType; 1452 1453 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1454 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1455 1456 // Check if we've already instantiated a vector of this type. 1457 llvm::FoldingSetNodeID ID; 1458 VectorType::Profile(ID, vecType, NumElts, Type::Vector, 1459 IsAltiVec, IsPixel); 1460 void *InsertPos = 0; 1461 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1462 return QualType(VTP, 0); 1463 1464 // If the element type isn't canonical, this won't be a canonical type either, 1465 // so fill in the canonical type field. 1466 QualType Canonical; 1467 if (!vecType.isCanonical() || IsAltiVec || IsPixel) { 1468 Canonical = getVectorType(getCanonicalType(vecType), 1469 NumElts, false, false); 1470 1471 // Get the new insert position for the node we care about. 1472 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1473 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1474 } 1475 VectorType *New = new (*this, TypeAlignment) 1476 VectorType(vecType, NumElts, Canonical, IsAltiVec, IsPixel); 1477 VectorTypes.InsertNode(New, InsertPos); 1478 Types.push_back(New); 1479 return QualType(New, 0); 1480} 1481 1482/// getExtVectorType - Return the unique reference to an extended vector type of 1483/// the specified element type and size. VectorType must be a built-in type. 1484QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1485 BuiltinType *baseType; 1486 1487 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1488 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1489 1490 // Check if we've already instantiated a vector of this type. 1491 llvm::FoldingSetNodeID ID; 1492 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, false, false); 1493 void *InsertPos = 0; 1494 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1495 return QualType(VTP, 0); 1496 1497 // If the element type isn't canonical, this won't be a canonical type either, 1498 // so fill in the canonical type field. 1499 QualType Canonical; 1500 if (!vecType.isCanonical()) { 1501 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1502 1503 // Get the new insert position for the node we care about. 1504 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1505 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1506 } 1507 ExtVectorType *New = new (*this, TypeAlignment) 1508 ExtVectorType(vecType, NumElts, Canonical); 1509 VectorTypes.InsertNode(New, InsertPos); 1510 Types.push_back(New); 1511 return QualType(New, 0); 1512} 1513 1514QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1515 Expr *SizeExpr, 1516 SourceLocation AttrLoc) { 1517 llvm::FoldingSetNodeID ID; 1518 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1519 SizeExpr); 1520 1521 void *InsertPos = 0; 1522 DependentSizedExtVectorType *Canon 1523 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1524 DependentSizedExtVectorType *New; 1525 if (Canon) { 1526 // We already have a canonical version of this array type; use it as 1527 // the canonical type for a newly-built type. 1528 New = new (*this, TypeAlignment) 1529 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1530 SizeExpr, AttrLoc); 1531 } else { 1532 QualType CanonVecTy = getCanonicalType(vecType); 1533 if (CanonVecTy == vecType) { 1534 New = new (*this, TypeAlignment) 1535 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1536 AttrLoc); 1537 1538 DependentSizedExtVectorType *CanonCheck 1539 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1540 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1541 (void)CanonCheck; 1542 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1543 } else { 1544 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1545 SourceLocation()); 1546 New = new (*this, TypeAlignment) 1547 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1548 } 1549 } 1550 1551 Types.push_back(New); 1552 return QualType(New, 0); 1553} 1554 1555/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1556/// 1557QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, 1558 const FunctionType::ExtInfo &Info) { 1559 const CallingConv CallConv = Info.getCC(); 1560 // Unique functions, to guarantee there is only one function of a particular 1561 // structure. 1562 llvm::FoldingSetNodeID ID; 1563 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1564 1565 void *InsertPos = 0; 1566 if (FunctionNoProtoType *FT = 1567 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1568 return QualType(FT, 0); 1569 1570 QualType Canonical; 1571 if (!ResultTy.isCanonical() || 1572 getCanonicalCallConv(CallConv) != CallConv) { 1573 Canonical = 1574 getFunctionNoProtoType(getCanonicalType(ResultTy), 1575 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1576 1577 // Get the new insert position for the node we care about. 1578 FunctionNoProtoType *NewIP = 1579 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1580 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1581 } 1582 1583 FunctionNoProtoType *New = new (*this, TypeAlignment) 1584 FunctionNoProtoType(ResultTy, Canonical, Info); 1585 Types.push_back(New); 1586 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1587 return QualType(New, 0); 1588} 1589 1590/// getFunctionType - Return a normal function type with a typed argument 1591/// list. isVariadic indicates whether the argument list includes '...'. 1592QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1593 unsigned NumArgs, bool isVariadic, 1594 unsigned TypeQuals, bool hasExceptionSpec, 1595 bool hasAnyExceptionSpec, unsigned NumExs, 1596 const QualType *ExArray, 1597 const FunctionType::ExtInfo &Info) { 1598 const CallingConv CallConv= Info.getCC(); 1599 // Unique functions, to guarantee there is only one function of a particular 1600 // structure. 1601 llvm::FoldingSetNodeID ID; 1602 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1603 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1604 NumExs, ExArray, Info); 1605 1606 void *InsertPos = 0; 1607 if (FunctionProtoType *FTP = 1608 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1609 return QualType(FTP, 0); 1610 1611 // Determine whether the type being created is already canonical or not. 1612 bool isCanonical = !hasExceptionSpec && ResultTy.isCanonical(); 1613 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1614 if (!ArgArray[i].isCanonicalAsParam()) 1615 isCanonical = false; 1616 1617 // If this type isn't canonical, get the canonical version of it. 1618 // The exception spec is not part of the canonical type. 1619 QualType Canonical; 1620 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1621 llvm::SmallVector<QualType, 16> CanonicalArgs; 1622 CanonicalArgs.reserve(NumArgs); 1623 for (unsigned i = 0; i != NumArgs; ++i) 1624 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1625 1626 Canonical = getFunctionType(getCanonicalType(ResultTy), 1627 CanonicalArgs.data(), NumArgs, 1628 isVariadic, TypeQuals, false, 1629 false, 0, 0, 1630 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1631 1632 // Get the new insert position for the node we care about. 1633 FunctionProtoType *NewIP = 1634 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1635 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1636 } 1637 1638 // FunctionProtoType objects are allocated with extra bytes after them 1639 // for two variable size arrays (for parameter and exception types) at the 1640 // end of them. 1641 FunctionProtoType *FTP = 1642 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1643 NumArgs*sizeof(QualType) + 1644 NumExs*sizeof(QualType), TypeAlignment); 1645 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1646 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1647 ExArray, NumExs, Canonical, Info); 1648 Types.push_back(FTP); 1649 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1650 return QualType(FTP, 0); 1651} 1652 1653#ifndef NDEBUG 1654static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1655 if (!isa<CXXRecordDecl>(D)) return false; 1656 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1657 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1658 return true; 1659 if (RD->getDescribedClassTemplate() && 1660 !isa<ClassTemplateSpecializationDecl>(RD)) 1661 return true; 1662 return false; 1663} 1664#endif 1665 1666/// getInjectedClassNameType - Return the unique reference to the 1667/// injected class name type for the specified templated declaration. 1668QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1669 QualType TST) { 1670 assert(NeedsInjectedClassNameType(Decl)); 1671 if (Decl->TypeForDecl) { 1672 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1673 } else if (CXXRecordDecl *PrevDecl 1674 = cast_or_null<CXXRecordDecl>(Decl->getPreviousDeclaration())) { 1675 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1676 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1677 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1678 } else { 1679 Decl->TypeForDecl = 1680 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 1681 Types.push_back(Decl->TypeForDecl); 1682 } 1683 return QualType(Decl->TypeForDecl, 0); 1684} 1685 1686/// getTypeDeclType - Return the unique reference to the type for the 1687/// specified type declaration. 1688QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) { 1689 assert(Decl && "Passed null for Decl param"); 1690 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 1691 1692 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1693 return getTypedefType(Typedef); 1694 1695 if (const ObjCInterfaceDecl *ObjCInterface 1696 = dyn_cast<ObjCInterfaceDecl>(Decl)) 1697 return getObjCInterfaceType(ObjCInterface); 1698 1699 assert(!isa<TemplateTypeParmDecl>(Decl) && 1700 "Template type parameter types are always available."); 1701 1702 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1703 assert(!Record->getPreviousDeclaration() && 1704 "struct/union has previous declaration"); 1705 assert(!NeedsInjectedClassNameType(Record)); 1706 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Record); 1707 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1708 assert(!Enum->getPreviousDeclaration() && 1709 "enum has previous declaration"); 1710 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Enum); 1711 } else if (const UnresolvedUsingTypenameDecl *Using = 1712 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1713 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1714 } else 1715 llvm_unreachable("TypeDecl without a type?"); 1716 1717 Types.push_back(Decl->TypeForDecl); 1718 return QualType(Decl->TypeForDecl, 0); 1719} 1720 1721/// getTypedefType - Return the unique reference to the type for the 1722/// specified typename decl. 1723QualType ASTContext::getTypedefType(const TypedefDecl *Decl) { 1724 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1725 1726 QualType Canonical = getCanonicalType(Decl->getUnderlyingType()); 1727 Decl->TypeForDecl = new(*this, TypeAlignment) 1728 TypedefType(Type::Typedef, Decl, Canonical); 1729 Types.push_back(Decl->TypeForDecl); 1730 return QualType(Decl->TypeForDecl, 0); 1731} 1732 1733/// \brief Retrieve a substitution-result type. 1734QualType 1735ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1736 QualType Replacement) { 1737 assert(Replacement.isCanonical() 1738 && "replacement types must always be canonical"); 1739 1740 llvm::FoldingSetNodeID ID; 1741 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1742 void *InsertPos = 0; 1743 SubstTemplateTypeParmType *SubstParm 1744 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1745 1746 if (!SubstParm) { 1747 SubstParm = new (*this, TypeAlignment) 1748 SubstTemplateTypeParmType(Parm, Replacement); 1749 Types.push_back(SubstParm); 1750 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1751 } 1752 1753 return QualType(SubstParm, 0); 1754} 1755 1756/// \brief Retrieve the template type parameter type for a template 1757/// parameter or parameter pack with the given depth, index, and (optionally) 1758/// name. 1759QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1760 bool ParameterPack, 1761 IdentifierInfo *Name) { 1762 llvm::FoldingSetNodeID ID; 1763 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1764 void *InsertPos = 0; 1765 TemplateTypeParmType *TypeParm 1766 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1767 1768 if (TypeParm) 1769 return QualType(TypeParm, 0); 1770 1771 if (Name) { 1772 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1773 TypeParm = new (*this, TypeAlignment) 1774 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 1775 1776 TemplateTypeParmType *TypeCheck 1777 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1778 assert(!TypeCheck && "Template type parameter canonical type broken"); 1779 (void)TypeCheck; 1780 } else 1781 TypeParm = new (*this, TypeAlignment) 1782 TemplateTypeParmType(Depth, Index, ParameterPack); 1783 1784 Types.push_back(TypeParm); 1785 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1786 1787 return QualType(TypeParm, 0); 1788} 1789 1790TypeSourceInfo * 1791ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 1792 SourceLocation NameLoc, 1793 const TemplateArgumentListInfo &Args, 1794 QualType CanonType) { 1795 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 1796 1797 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 1798 TemplateSpecializationTypeLoc TL 1799 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 1800 TL.setTemplateNameLoc(NameLoc); 1801 TL.setLAngleLoc(Args.getLAngleLoc()); 1802 TL.setRAngleLoc(Args.getRAngleLoc()); 1803 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 1804 TL.setArgLocInfo(i, Args[i].getLocInfo()); 1805 return DI; 1806} 1807 1808QualType 1809ASTContext::getTemplateSpecializationType(TemplateName Template, 1810 const TemplateArgumentListInfo &Args, 1811 QualType Canon, 1812 bool IsCurrentInstantiation) { 1813 unsigned NumArgs = Args.size(); 1814 1815 llvm::SmallVector<TemplateArgument, 4> ArgVec; 1816 ArgVec.reserve(NumArgs); 1817 for (unsigned i = 0; i != NumArgs; ++i) 1818 ArgVec.push_back(Args[i].getArgument()); 1819 1820 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 1821 Canon, IsCurrentInstantiation); 1822} 1823 1824QualType 1825ASTContext::getTemplateSpecializationType(TemplateName Template, 1826 const TemplateArgument *Args, 1827 unsigned NumArgs, 1828 QualType Canon, 1829 bool IsCurrentInstantiation) { 1830 if (!Canon.isNull()) 1831 Canon = getCanonicalType(Canon); 1832 else { 1833 assert(!IsCurrentInstantiation && 1834 "current-instantiation specializations should always " 1835 "have a canonical type"); 1836 1837 // Build the canonical template specialization type. 1838 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 1839 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 1840 CanonArgs.reserve(NumArgs); 1841 for (unsigned I = 0; I != NumArgs; ++I) 1842 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 1843 1844 // Determine whether this canonical template specialization type already 1845 // exists. 1846 llvm::FoldingSetNodeID ID; 1847 TemplateSpecializationType::Profile(ID, CanonTemplate, false, 1848 CanonArgs.data(), NumArgs, *this); 1849 1850 void *InsertPos = 0; 1851 TemplateSpecializationType *Spec 1852 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1853 1854 if (!Spec) { 1855 // Allocate a new canonical template specialization type. 1856 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1857 sizeof(TemplateArgument) * NumArgs), 1858 TypeAlignment); 1859 Spec = new (Mem) TemplateSpecializationType(*this, CanonTemplate, false, 1860 CanonArgs.data(), NumArgs, 1861 Canon); 1862 Types.push_back(Spec); 1863 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1864 } 1865 1866 if (Canon.isNull()) 1867 Canon = QualType(Spec, 0); 1868 assert(Canon->isDependentType() && 1869 "Non-dependent template-id type must have a canonical type"); 1870 } 1871 1872 // Allocate the (non-canonical) template specialization type, but don't 1873 // try to unique it: these types typically have location information that 1874 // we don't unique and don't want to lose. 1875 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1876 sizeof(TemplateArgument) * NumArgs), 1877 TypeAlignment); 1878 TemplateSpecializationType *Spec 1879 = new (Mem) TemplateSpecializationType(*this, Template, 1880 IsCurrentInstantiation, 1881 Args, NumArgs, 1882 Canon); 1883 1884 Types.push_back(Spec); 1885 return QualType(Spec, 0); 1886} 1887 1888QualType 1889ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 1890 NestedNameSpecifier *NNS, 1891 QualType NamedType) { 1892 llvm::FoldingSetNodeID ID; 1893 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 1894 1895 void *InsertPos = 0; 1896 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1897 if (T) 1898 return QualType(T, 0); 1899 1900 QualType Canon = NamedType; 1901 if (!Canon.isCanonical()) { 1902 Canon = getCanonicalType(NamedType); 1903 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1904 assert(!CheckT && "Elaborated canonical type broken"); 1905 (void)CheckT; 1906 } 1907 1908 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 1909 Types.push_back(T); 1910 ElaboratedTypes.InsertNode(T, InsertPos); 1911 return QualType(T, 0); 1912} 1913 1914QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 1915 NestedNameSpecifier *NNS, 1916 const IdentifierInfo *Name, 1917 QualType Canon) { 1918 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1919 1920 if (Canon.isNull()) { 1921 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1922 ElaboratedTypeKeyword CanonKeyword = Keyword; 1923 if (Keyword == ETK_None) 1924 CanonKeyword = ETK_Typename; 1925 1926 if (CanonNNS != NNS || CanonKeyword != Keyword) 1927 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 1928 } 1929 1930 llvm::FoldingSetNodeID ID; 1931 DependentNameType::Profile(ID, Keyword, NNS, Name); 1932 1933 void *InsertPos = 0; 1934 DependentNameType *T 1935 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1936 if (T) 1937 return QualType(T, 0); 1938 1939 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 1940 Types.push_back(T); 1941 DependentNameTypes.InsertNode(T, InsertPos); 1942 return QualType(T, 0); 1943} 1944 1945QualType 1946ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 1947 NestedNameSpecifier *NNS, 1948 const TemplateSpecializationType *TemplateId, 1949 QualType Canon) { 1950 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1951 1952 llvm::FoldingSetNodeID ID; 1953 DependentNameType::Profile(ID, Keyword, NNS, TemplateId); 1954 1955 void *InsertPos = 0; 1956 DependentNameType *T 1957 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1958 if (T) 1959 return QualType(T, 0); 1960 1961 if (Canon.isNull()) { 1962 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1963 QualType CanonType = getCanonicalType(QualType(TemplateId, 0)); 1964 ElaboratedTypeKeyword CanonKeyword = Keyword; 1965 if (Keyword == ETK_None) 1966 CanonKeyword = ETK_Typename; 1967 if (CanonNNS != NNS || CanonKeyword != Keyword || 1968 CanonType != QualType(TemplateId, 0)) { 1969 const TemplateSpecializationType *CanonTemplateId 1970 = CanonType->getAs<TemplateSpecializationType>(); 1971 assert(CanonTemplateId && 1972 "Canonical type must also be a template specialization type"); 1973 Canon = getDependentNameType(CanonKeyword, CanonNNS, CanonTemplateId); 1974 } 1975 1976 DependentNameType *CheckT 1977 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1978 assert(!CheckT && "Typename canonical type is broken"); (void)CheckT; 1979 } 1980 1981 T = new (*this) DependentNameType(Keyword, NNS, TemplateId, Canon); 1982 Types.push_back(T); 1983 DependentNameTypes.InsertNode(T, InsertPos); 1984 return QualType(T, 0); 1985} 1986 1987/// CmpProtocolNames - Comparison predicate for sorting protocols 1988/// alphabetically. 1989static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 1990 const ObjCProtocolDecl *RHS) { 1991 return LHS->getDeclName() < RHS->getDeclName(); 1992} 1993 1994static bool areSortedAndUniqued(ObjCProtocolDecl **Protocols, 1995 unsigned NumProtocols) { 1996 if (NumProtocols == 0) return true; 1997 1998 for (unsigned i = 1; i != NumProtocols; ++i) 1999 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2000 return false; 2001 return true; 2002} 2003 2004static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2005 unsigned &NumProtocols) { 2006 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2007 2008 // Sort protocols, keyed by name. 2009 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2010 2011 // Remove duplicates. 2012 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2013 NumProtocols = ProtocolsEnd-Protocols; 2014} 2015 2016/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2017/// the given interface decl and the conforming protocol list. 2018QualType ASTContext::getObjCObjectPointerType(QualType InterfaceT, 2019 ObjCProtocolDecl **Protocols, 2020 unsigned NumProtocols, 2021 unsigned Quals) { 2022 llvm::FoldingSetNodeID ID; 2023 ObjCObjectPointerType::Profile(ID, InterfaceT, Protocols, NumProtocols); 2024 Qualifiers Qs = Qualifiers::fromCVRMask(Quals); 2025 2026 void *InsertPos = 0; 2027 if (ObjCObjectPointerType *QT = 2028 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2029 return getQualifiedType(QualType(QT, 0), Qs); 2030 2031 // Sort the protocol list alphabetically to canonicalize it. 2032 QualType Canonical; 2033 if (!InterfaceT.isCanonical() || 2034 !areSortedAndUniqued(Protocols, NumProtocols)) { 2035 if (!areSortedAndUniqued(Protocols, NumProtocols)) { 2036 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2037 Protocols + NumProtocols); 2038 unsigned UniqueCount = NumProtocols; 2039 2040 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2041 2042 Canonical = getObjCObjectPointerType(getCanonicalType(InterfaceT), 2043 &Sorted[0], UniqueCount); 2044 } else { 2045 Canonical = getObjCObjectPointerType(getCanonicalType(InterfaceT), 2046 Protocols, NumProtocols); 2047 } 2048 2049 // Regenerate InsertPos. 2050 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2051 } 2052 2053 // No match. 2054 unsigned Size = sizeof(ObjCObjectPointerType) 2055 + NumProtocols * sizeof(ObjCProtocolDecl *); 2056 void *Mem = Allocate(Size, TypeAlignment); 2057 ObjCObjectPointerType *QType = new (Mem) ObjCObjectPointerType(Canonical, 2058 InterfaceT, 2059 Protocols, 2060 NumProtocols); 2061 2062 Types.push_back(QType); 2063 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2064 return getQualifiedType(QualType(QType, 0), Qs); 2065} 2066 2067/// getObjCInterfaceType - Return the unique reference to the type for the 2068/// specified ObjC interface decl. The list of protocols is optional. 2069QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 2070 ObjCProtocolDecl **Protocols, unsigned NumProtocols) { 2071 llvm::FoldingSetNodeID ID; 2072 ObjCInterfaceType::Profile(ID, Decl, Protocols, NumProtocols); 2073 2074 void *InsertPos = 0; 2075 if (ObjCInterfaceType *QT = 2076 ObjCInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos)) 2077 return QualType(QT, 0); 2078 2079 // Sort the protocol list alphabetically to canonicalize it. 2080 QualType Canonical; 2081 if (NumProtocols && !areSortedAndUniqued(Protocols, NumProtocols)) { 2082 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2083 Protocols + NumProtocols); 2084 2085 unsigned UniqueCount = NumProtocols; 2086 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2087 2088 Canonical = getObjCInterfaceType(Decl, &Sorted[0], UniqueCount); 2089 2090 ObjCInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos); 2091 } 2092 2093 unsigned Size = sizeof(ObjCInterfaceType) 2094 + NumProtocols * sizeof(ObjCProtocolDecl *); 2095 void *Mem = Allocate(Size, TypeAlignment); 2096 ObjCInterfaceType *QType = new (Mem) ObjCInterfaceType(Canonical, 2097 const_cast<ObjCInterfaceDecl*>(Decl), 2098 Protocols, 2099 NumProtocols); 2100 2101 Types.push_back(QType); 2102 ObjCInterfaceTypes.InsertNode(QType, InsertPos); 2103 return QualType(QType, 0); 2104} 2105 2106/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2107/// TypeOfExprType AST's (since expression's are never shared). For example, 2108/// multiple declarations that refer to "typeof(x)" all contain different 2109/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2110/// on canonical type's (which are always unique). 2111QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2112 TypeOfExprType *toe; 2113 if (tofExpr->isTypeDependent()) { 2114 llvm::FoldingSetNodeID ID; 2115 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2116 2117 void *InsertPos = 0; 2118 DependentTypeOfExprType *Canon 2119 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2120 if (Canon) { 2121 // We already have a "canonical" version of an identical, dependent 2122 // typeof(expr) type. Use that as our canonical type. 2123 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2124 QualType((TypeOfExprType*)Canon, 0)); 2125 } 2126 else { 2127 // Build a new, canonical typeof(expr) type. 2128 Canon 2129 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2130 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2131 toe = Canon; 2132 } 2133 } else { 2134 QualType Canonical = getCanonicalType(tofExpr->getType()); 2135 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2136 } 2137 Types.push_back(toe); 2138 return QualType(toe, 0); 2139} 2140 2141/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2142/// TypeOfType AST's. The only motivation to unique these nodes would be 2143/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2144/// an issue. This doesn't effect the type checker, since it operates 2145/// on canonical type's (which are always unique). 2146QualType ASTContext::getTypeOfType(QualType tofType) { 2147 QualType Canonical = getCanonicalType(tofType); 2148 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2149 Types.push_back(tot); 2150 return QualType(tot, 0); 2151} 2152 2153/// getDecltypeForExpr - Given an expr, will return the decltype for that 2154/// expression, according to the rules in C++0x [dcl.type.simple]p4 2155static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2156 if (e->isTypeDependent()) 2157 return Context.DependentTy; 2158 2159 // If e is an id expression or a class member access, decltype(e) is defined 2160 // as the type of the entity named by e. 2161 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2162 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2163 return VD->getType(); 2164 } 2165 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2166 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2167 return FD->getType(); 2168 } 2169 // If e is a function call or an invocation of an overloaded operator, 2170 // (parentheses around e are ignored), decltype(e) is defined as the 2171 // return type of that function. 2172 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2173 return CE->getCallReturnType(); 2174 2175 QualType T = e->getType(); 2176 2177 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2178 // defined as T&, otherwise decltype(e) is defined as T. 2179 if (e->isLvalue(Context) == Expr::LV_Valid) 2180 T = Context.getLValueReferenceType(T); 2181 2182 return T; 2183} 2184 2185/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2186/// DecltypeType AST's. The only motivation to unique these nodes would be 2187/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2188/// an issue. This doesn't effect the type checker, since it operates 2189/// on canonical type's (which are always unique). 2190QualType ASTContext::getDecltypeType(Expr *e) { 2191 DecltypeType *dt; 2192 if (e->isTypeDependent()) { 2193 llvm::FoldingSetNodeID ID; 2194 DependentDecltypeType::Profile(ID, *this, e); 2195 2196 void *InsertPos = 0; 2197 DependentDecltypeType *Canon 2198 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2199 if (Canon) { 2200 // We already have a "canonical" version of an equivalent, dependent 2201 // decltype type. Use that as our canonical type. 2202 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2203 QualType((DecltypeType*)Canon, 0)); 2204 } 2205 else { 2206 // Build a new, canonical typeof(expr) type. 2207 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2208 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2209 dt = Canon; 2210 } 2211 } else { 2212 QualType T = getDecltypeForExpr(e, *this); 2213 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2214 } 2215 Types.push_back(dt); 2216 return QualType(dt, 0); 2217} 2218 2219/// getTagDeclType - Return the unique reference to the type for the 2220/// specified TagDecl (struct/union/class/enum) decl. 2221QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2222 assert (Decl); 2223 // FIXME: What is the design on getTagDeclType when it requires casting 2224 // away const? mutable? 2225 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2226} 2227 2228/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2229/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2230/// needs to agree with the definition in <stddef.h>. 2231CanQualType ASTContext::getSizeType() const { 2232 return getFromTargetType(Target.getSizeType()); 2233} 2234 2235/// getSignedWCharType - Return the type of "signed wchar_t". 2236/// Used when in C++, as a GCC extension. 2237QualType ASTContext::getSignedWCharType() const { 2238 // FIXME: derive from "Target" ? 2239 return WCharTy; 2240} 2241 2242/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2243/// Used when in C++, as a GCC extension. 2244QualType ASTContext::getUnsignedWCharType() const { 2245 // FIXME: derive from "Target" ? 2246 return UnsignedIntTy; 2247} 2248 2249/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2250/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2251QualType ASTContext::getPointerDiffType() const { 2252 return getFromTargetType(Target.getPtrDiffType(0)); 2253} 2254 2255//===----------------------------------------------------------------------===// 2256// Type Operators 2257//===----------------------------------------------------------------------===// 2258 2259CanQualType ASTContext::getCanonicalParamType(QualType T) { 2260 // Push qualifiers into arrays, and then discard any remaining 2261 // qualifiers. 2262 T = getCanonicalType(T); 2263 const Type *Ty = T.getTypePtr(); 2264 2265 QualType Result; 2266 if (isa<ArrayType>(Ty)) { 2267 Result = getArrayDecayedType(QualType(Ty,0)); 2268 } else if (isa<FunctionType>(Ty)) { 2269 Result = getPointerType(QualType(Ty, 0)); 2270 } else { 2271 Result = QualType(Ty, 0); 2272 } 2273 2274 return CanQualType::CreateUnsafe(Result); 2275} 2276 2277/// getCanonicalType - Return the canonical (structural) type corresponding to 2278/// the specified potentially non-canonical type. The non-canonical version 2279/// of a type may have many "decorated" versions of types. Decorators can 2280/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2281/// to be free of any of these, allowing two canonical types to be compared 2282/// for exact equality with a simple pointer comparison. 2283CanQualType ASTContext::getCanonicalType(QualType T) { 2284 QualifierCollector Quals; 2285 const Type *Ptr = Quals.strip(T); 2286 QualType CanType = Ptr->getCanonicalTypeInternal(); 2287 2288 // The canonical internal type will be the canonical type *except* 2289 // that we push type qualifiers down through array types. 2290 2291 // If there are no new qualifiers to push down, stop here. 2292 if (!Quals.hasQualifiers()) 2293 return CanQualType::CreateUnsafe(CanType); 2294 2295 // If the type qualifiers are on an array type, get the canonical 2296 // type of the array with the qualifiers applied to the element 2297 // type. 2298 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2299 if (!AT) 2300 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2301 2302 // Get the canonical version of the element with the extra qualifiers on it. 2303 // This can recursively sink qualifiers through multiple levels of arrays. 2304 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2305 NewEltTy = getCanonicalType(NewEltTy); 2306 2307 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2308 return CanQualType::CreateUnsafe( 2309 getConstantArrayType(NewEltTy, CAT->getSize(), 2310 CAT->getSizeModifier(), 2311 CAT->getIndexTypeCVRQualifiers())); 2312 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2313 return CanQualType::CreateUnsafe( 2314 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2315 IAT->getIndexTypeCVRQualifiers())); 2316 2317 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2318 return CanQualType::CreateUnsafe( 2319 getDependentSizedArrayType(NewEltTy, 2320 DSAT->getSizeExpr() ? 2321 DSAT->getSizeExpr()->Retain() : 0, 2322 DSAT->getSizeModifier(), 2323 DSAT->getIndexTypeCVRQualifiers(), 2324 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2325 2326 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2327 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2328 VAT->getSizeExpr() ? 2329 VAT->getSizeExpr()->Retain() : 0, 2330 VAT->getSizeModifier(), 2331 VAT->getIndexTypeCVRQualifiers(), 2332 VAT->getBracketsRange())); 2333} 2334 2335QualType ASTContext::getUnqualifiedArrayType(QualType T, 2336 Qualifiers &Quals) { 2337 Quals = T.getQualifiers(); 2338 if (!isa<ArrayType>(T)) { 2339 return T.getUnqualifiedType(); 2340 } 2341 2342 const ArrayType *AT = cast<ArrayType>(T); 2343 QualType Elt = AT->getElementType(); 2344 QualType UnqualElt = getUnqualifiedArrayType(Elt, Quals); 2345 if (Elt == UnqualElt) 2346 return T; 2347 2348 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(T)) { 2349 return getConstantArrayType(UnqualElt, CAT->getSize(), 2350 CAT->getSizeModifier(), 0); 2351 } 2352 2353 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(T)) { 2354 return getIncompleteArrayType(UnqualElt, IAT->getSizeModifier(), 0); 2355 } 2356 2357 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(T); 2358 return getDependentSizedArrayType(UnqualElt, DSAT->getSizeExpr()->Retain(), 2359 DSAT->getSizeModifier(), 0, 2360 SourceRange()); 2361} 2362 2363DeclarationName ASTContext::getNameForTemplate(TemplateName Name) { 2364 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2365 return TD->getDeclName(); 2366 2367 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2368 if (DTN->isIdentifier()) { 2369 return DeclarationNames.getIdentifier(DTN->getIdentifier()); 2370 } else { 2371 return DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2372 } 2373 } 2374 2375 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2376 assert(Storage); 2377 return (*Storage->begin())->getDeclName(); 2378} 2379 2380TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2381 // If this template name refers to a template, the canonical 2382 // template name merely stores the template itself. 2383 if (TemplateDecl *Template = Name.getAsTemplateDecl()) 2384 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2385 2386 assert(!Name.getAsOverloadedTemplate()); 2387 2388 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2389 assert(DTN && "Non-dependent template names must refer to template decls."); 2390 return DTN->CanonicalTemplateName; 2391} 2392 2393bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2394 X = getCanonicalTemplateName(X); 2395 Y = getCanonicalTemplateName(Y); 2396 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2397} 2398 2399TemplateArgument 2400ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2401 switch (Arg.getKind()) { 2402 case TemplateArgument::Null: 2403 return Arg; 2404 2405 case TemplateArgument::Expression: 2406 return Arg; 2407 2408 case TemplateArgument::Declaration: 2409 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2410 2411 case TemplateArgument::Template: 2412 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2413 2414 case TemplateArgument::Integral: 2415 return TemplateArgument(*Arg.getAsIntegral(), 2416 getCanonicalType(Arg.getIntegralType())); 2417 2418 case TemplateArgument::Type: 2419 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2420 2421 case TemplateArgument::Pack: { 2422 // FIXME: Allocate in ASTContext 2423 TemplateArgument *CanonArgs = new TemplateArgument[Arg.pack_size()]; 2424 unsigned Idx = 0; 2425 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2426 AEnd = Arg.pack_end(); 2427 A != AEnd; (void)++A, ++Idx) 2428 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2429 2430 TemplateArgument Result; 2431 Result.setArgumentPack(CanonArgs, Arg.pack_size(), false); 2432 return Result; 2433 } 2434 } 2435 2436 // Silence GCC warning 2437 assert(false && "Unhandled template argument kind"); 2438 return TemplateArgument(); 2439} 2440 2441NestedNameSpecifier * 2442ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2443 if (!NNS) 2444 return 0; 2445 2446 switch (NNS->getKind()) { 2447 case NestedNameSpecifier::Identifier: 2448 // Canonicalize the prefix but keep the identifier the same. 2449 return NestedNameSpecifier::Create(*this, 2450 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2451 NNS->getAsIdentifier()); 2452 2453 case NestedNameSpecifier::Namespace: 2454 // A namespace is canonical; build a nested-name-specifier with 2455 // this namespace and no prefix. 2456 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2457 2458 case NestedNameSpecifier::TypeSpec: 2459 case NestedNameSpecifier::TypeSpecWithTemplate: { 2460 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2461 return NestedNameSpecifier::Create(*this, 0, 2462 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2463 T.getTypePtr()); 2464 } 2465 2466 case NestedNameSpecifier::Global: 2467 // The global specifier is canonical and unique. 2468 return NNS; 2469 } 2470 2471 // Required to silence a GCC warning 2472 return 0; 2473} 2474 2475 2476const ArrayType *ASTContext::getAsArrayType(QualType T) { 2477 // Handle the non-qualified case efficiently. 2478 if (!T.hasLocalQualifiers()) { 2479 // Handle the common positive case fast. 2480 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2481 return AT; 2482 } 2483 2484 // Handle the common negative case fast. 2485 QualType CType = T->getCanonicalTypeInternal(); 2486 if (!isa<ArrayType>(CType)) 2487 return 0; 2488 2489 // Apply any qualifiers from the array type to the element type. This 2490 // implements C99 6.7.3p8: "If the specification of an array type includes 2491 // any type qualifiers, the element type is so qualified, not the array type." 2492 2493 // If we get here, we either have type qualifiers on the type, or we have 2494 // sugar such as a typedef in the way. If we have type qualifiers on the type 2495 // we must propagate them down into the element type. 2496 2497 QualifierCollector Qs; 2498 const Type *Ty = Qs.strip(T.getDesugaredType()); 2499 2500 // If we have a simple case, just return now. 2501 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2502 if (ATy == 0 || Qs.empty()) 2503 return ATy; 2504 2505 // Otherwise, we have an array and we have qualifiers on it. Push the 2506 // qualifiers into the array element type and return a new array type. 2507 // Get the canonical version of the element with the extra qualifiers on it. 2508 // This can recursively sink qualifiers through multiple levels of arrays. 2509 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2510 2511 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2512 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2513 CAT->getSizeModifier(), 2514 CAT->getIndexTypeCVRQualifiers())); 2515 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2516 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2517 IAT->getSizeModifier(), 2518 IAT->getIndexTypeCVRQualifiers())); 2519 2520 if (const DependentSizedArrayType *DSAT 2521 = dyn_cast<DependentSizedArrayType>(ATy)) 2522 return cast<ArrayType>( 2523 getDependentSizedArrayType(NewEltTy, 2524 DSAT->getSizeExpr() ? 2525 DSAT->getSizeExpr()->Retain() : 0, 2526 DSAT->getSizeModifier(), 2527 DSAT->getIndexTypeCVRQualifiers(), 2528 DSAT->getBracketsRange())); 2529 2530 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2531 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2532 VAT->getSizeExpr() ? 2533 VAT->getSizeExpr()->Retain() : 0, 2534 VAT->getSizeModifier(), 2535 VAT->getIndexTypeCVRQualifiers(), 2536 VAT->getBracketsRange())); 2537} 2538 2539 2540/// getArrayDecayedType - Return the properly qualified result of decaying the 2541/// specified array type to a pointer. This operation is non-trivial when 2542/// handling typedefs etc. The canonical type of "T" must be an array type, 2543/// this returns a pointer to a properly qualified element of the array. 2544/// 2545/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2546QualType ASTContext::getArrayDecayedType(QualType Ty) { 2547 // Get the element type with 'getAsArrayType' so that we don't lose any 2548 // typedefs in the element type of the array. This also handles propagation 2549 // of type qualifiers from the array type into the element type if present 2550 // (C99 6.7.3p8). 2551 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2552 assert(PrettyArrayType && "Not an array type!"); 2553 2554 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2555 2556 // int x[restrict 4] -> int *restrict 2557 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2558} 2559 2560QualType ASTContext::getBaseElementType(QualType QT) { 2561 QualifierCollector Qs; 2562 while (const ArrayType *AT = getAsArrayType(QualType(Qs.strip(QT), 0))) 2563 QT = AT->getElementType(); 2564 return Qs.apply(QT); 2565} 2566 2567QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2568 QualType ElemTy = AT->getElementType(); 2569 2570 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2571 return getBaseElementType(AT); 2572 2573 return ElemTy; 2574} 2575 2576/// getConstantArrayElementCount - Returns number of constant array elements. 2577uint64_t 2578ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2579 uint64_t ElementCount = 1; 2580 do { 2581 ElementCount *= CA->getSize().getZExtValue(); 2582 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2583 } while (CA); 2584 return ElementCount; 2585} 2586 2587/// getFloatingRank - Return a relative rank for floating point types. 2588/// This routine will assert if passed a built-in type that isn't a float. 2589static FloatingRank getFloatingRank(QualType T) { 2590 if (const ComplexType *CT = T->getAs<ComplexType>()) 2591 return getFloatingRank(CT->getElementType()); 2592 2593 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2594 switch (T->getAs<BuiltinType>()->getKind()) { 2595 default: assert(0 && "getFloatingRank(): not a floating type"); 2596 case BuiltinType::Float: return FloatRank; 2597 case BuiltinType::Double: return DoubleRank; 2598 case BuiltinType::LongDouble: return LongDoubleRank; 2599 } 2600} 2601 2602/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2603/// point or a complex type (based on typeDomain/typeSize). 2604/// 'typeDomain' is a real floating point or complex type. 2605/// 'typeSize' is a real floating point or complex type. 2606QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2607 QualType Domain) const { 2608 FloatingRank EltRank = getFloatingRank(Size); 2609 if (Domain->isComplexType()) { 2610 switch (EltRank) { 2611 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2612 case FloatRank: return FloatComplexTy; 2613 case DoubleRank: return DoubleComplexTy; 2614 case LongDoubleRank: return LongDoubleComplexTy; 2615 } 2616 } 2617 2618 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2619 switch (EltRank) { 2620 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2621 case FloatRank: return FloatTy; 2622 case DoubleRank: return DoubleTy; 2623 case LongDoubleRank: return LongDoubleTy; 2624 } 2625} 2626 2627/// getFloatingTypeOrder - Compare the rank of the two specified floating 2628/// point types, ignoring the domain of the type (i.e. 'double' == 2629/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2630/// LHS < RHS, return -1. 2631int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2632 FloatingRank LHSR = getFloatingRank(LHS); 2633 FloatingRank RHSR = getFloatingRank(RHS); 2634 2635 if (LHSR == RHSR) 2636 return 0; 2637 if (LHSR > RHSR) 2638 return 1; 2639 return -1; 2640} 2641 2642/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2643/// routine will assert if passed a built-in type that isn't an integer or enum, 2644/// or if it is not canonicalized. 2645unsigned ASTContext::getIntegerRank(Type *T) { 2646 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2647 if (EnumType* ET = dyn_cast<EnumType>(T)) 2648 T = ET->getDecl()->getPromotionType().getTypePtr(); 2649 2650 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2651 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2652 2653 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2654 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2655 2656 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2657 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2658 2659 switch (cast<BuiltinType>(T)->getKind()) { 2660 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2661 case BuiltinType::Bool: 2662 return 1 + (getIntWidth(BoolTy) << 3); 2663 case BuiltinType::Char_S: 2664 case BuiltinType::Char_U: 2665 case BuiltinType::SChar: 2666 case BuiltinType::UChar: 2667 return 2 + (getIntWidth(CharTy) << 3); 2668 case BuiltinType::Short: 2669 case BuiltinType::UShort: 2670 return 3 + (getIntWidth(ShortTy) << 3); 2671 case BuiltinType::Int: 2672 case BuiltinType::UInt: 2673 return 4 + (getIntWidth(IntTy) << 3); 2674 case BuiltinType::Long: 2675 case BuiltinType::ULong: 2676 return 5 + (getIntWidth(LongTy) << 3); 2677 case BuiltinType::LongLong: 2678 case BuiltinType::ULongLong: 2679 return 6 + (getIntWidth(LongLongTy) << 3); 2680 case BuiltinType::Int128: 2681 case BuiltinType::UInt128: 2682 return 7 + (getIntWidth(Int128Ty) << 3); 2683 } 2684} 2685 2686/// \brief Whether this is a promotable bitfield reference according 2687/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 2688/// 2689/// \returns the type this bit-field will promote to, or NULL if no 2690/// promotion occurs. 2691QualType ASTContext::isPromotableBitField(Expr *E) { 2692 FieldDecl *Field = E->getBitField(); 2693 if (!Field) 2694 return QualType(); 2695 2696 QualType FT = Field->getType(); 2697 2698 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 2699 uint64_t BitWidth = BitWidthAP.getZExtValue(); 2700 uint64_t IntSize = getTypeSize(IntTy); 2701 // GCC extension compatibility: if the bit-field size is less than or equal 2702 // to the size of int, it gets promoted no matter what its type is. 2703 // For instance, unsigned long bf : 4 gets promoted to signed int. 2704 if (BitWidth < IntSize) 2705 return IntTy; 2706 2707 if (BitWidth == IntSize) 2708 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 2709 2710 // Types bigger than int are not subject to promotions, and therefore act 2711 // like the base type. 2712 // FIXME: This doesn't quite match what gcc does, but what gcc does here 2713 // is ridiculous. 2714 return QualType(); 2715} 2716 2717/// getPromotedIntegerType - Returns the type that Promotable will 2718/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 2719/// integer type. 2720QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 2721 assert(!Promotable.isNull()); 2722 assert(Promotable->isPromotableIntegerType()); 2723 if (const EnumType *ET = Promotable->getAs<EnumType>()) 2724 return ET->getDecl()->getPromotionType(); 2725 if (Promotable->isSignedIntegerType()) 2726 return IntTy; 2727 uint64_t PromotableSize = getTypeSize(Promotable); 2728 uint64_t IntSize = getTypeSize(IntTy); 2729 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 2730 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 2731} 2732 2733/// getIntegerTypeOrder - Returns the highest ranked integer type: 2734/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2735/// LHS < RHS, return -1. 2736int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2737 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2738 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2739 if (LHSC == RHSC) return 0; 2740 2741 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2742 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2743 2744 unsigned LHSRank = getIntegerRank(LHSC); 2745 unsigned RHSRank = getIntegerRank(RHSC); 2746 2747 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2748 if (LHSRank == RHSRank) return 0; 2749 return LHSRank > RHSRank ? 1 : -1; 2750 } 2751 2752 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2753 if (LHSUnsigned) { 2754 // If the unsigned [LHS] type is larger, return it. 2755 if (LHSRank >= RHSRank) 2756 return 1; 2757 2758 // If the signed type can represent all values of the unsigned type, it 2759 // wins. Because we are dealing with 2's complement and types that are 2760 // powers of two larger than each other, this is always safe. 2761 return -1; 2762 } 2763 2764 // If the unsigned [RHS] type is larger, return it. 2765 if (RHSRank >= LHSRank) 2766 return -1; 2767 2768 // If the signed type can represent all values of the unsigned type, it 2769 // wins. Because we are dealing with 2's complement and types that are 2770 // powers of two larger than each other, this is always safe. 2771 return 1; 2772} 2773 2774static RecordDecl * 2775CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 2776 SourceLocation L, IdentifierInfo *Id) { 2777 if (Ctx.getLangOptions().CPlusPlus) 2778 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 2779 else 2780 return RecordDecl::Create(Ctx, TK, DC, L, Id); 2781} 2782 2783// getCFConstantStringType - Return the type used for constant CFStrings. 2784QualType ASTContext::getCFConstantStringType() { 2785 if (!CFConstantStringTypeDecl) { 2786 CFConstantStringTypeDecl = 2787 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2788 &Idents.get("NSConstantString")); 2789 CFConstantStringTypeDecl->startDefinition(); 2790 2791 QualType FieldTypes[4]; 2792 2793 // const int *isa; 2794 FieldTypes[0] = getPointerType(IntTy.withConst()); 2795 // int flags; 2796 FieldTypes[1] = IntTy; 2797 // const char *str; 2798 FieldTypes[2] = getPointerType(CharTy.withConst()); 2799 // long length; 2800 FieldTypes[3] = LongTy; 2801 2802 // Create fields 2803 for (unsigned i = 0; i < 4; ++i) { 2804 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2805 SourceLocation(), 0, 2806 FieldTypes[i], /*TInfo=*/0, 2807 /*BitWidth=*/0, 2808 /*Mutable=*/false); 2809 Field->setAccess(AS_public); 2810 CFConstantStringTypeDecl->addDecl(Field); 2811 } 2812 2813 CFConstantStringTypeDecl->completeDefinition(); 2814 } 2815 2816 return getTagDeclType(CFConstantStringTypeDecl); 2817} 2818 2819void ASTContext::setCFConstantStringType(QualType T) { 2820 const RecordType *Rec = T->getAs<RecordType>(); 2821 assert(Rec && "Invalid CFConstantStringType"); 2822 CFConstantStringTypeDecl = Rec->getDecl(); 2823} 2824 2825// getNSConstantStringType - Return the type used for constant NSStrings. 2826QualType ASTContext::getNSConstantStringType() { 2827 if (!NSConstantStringTypeDecl) { 2828 NSConstantStringTypeDecl = 2829 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2830 &Idents.get("__builtin_NSString")); 2831 NSConstantStringTypeDecl->startDefinition(); 2832 2833 QualType FieldTypes[3]; 2834 2835 // const int *isa; 2836 FieldTypes[0] = getPointerType(IntTy.withConst()); 2837 // const char *str; 2838 FieldTypes[1] = getPointerType(CharTy.withConst()); 2839 // unsigned int length; 2840 FieldTypes[2] = UnsignedIntTy; 2841 2842 // Create fields 2843 for (unsigned i = 0; i < 3; ++i) { 2844 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 2845 SourceLocation(), 0, 2846 FieldTypes[i], /*TInfo=*/0, 2847 /*BitWidth=*/0, 2848 /*Mutable=*/false); 2849 Field->setAccess(AS_public); 2850 NSConstantStringTypeDecl->addDecl(Field); 2851 } 2852 2853 NSConstantStringTypeDecl->completeDefinition(); 2854 } 2855 2856 return getTagDeclType(NSConstantStringTypeDecl); 2857} 2858 2859void ASTContext::setNSConstantStringType(QualType T) { 2860 const RecordType *Rec = T->getAs<RecordType>(); 2861 assert(Rec && "Invalid NSConstantStringType"); 2862 NSConstantStringTypeDecl = Rec->getDecl(); 2863} 2864 2865QualType ASTContext::getObjCFastEnumerationStateType() { 2866 if (!ObjCFastEnumerationStateTypeDecl) { 2867 ObjCFastEnumerationStateTypeDecl = 2868 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2869 &Idents.get("__objcFastEnumerationState")); 2870 ObjCFastEnumerationStateTypeDecl->startDefinition(); 2871 2872 QualType FieldTypes[] = { 2873 UnsignedLongTy, 2874 getPointerType(ObjCIdTypedefType), 2875 getPointerType(UnsignedLongTy), 2876 getConstantArrayType(UnsignedLongTy, 2877 llvm::APInt(32, 5), ArrayType::Normal, 0) 2878 }; 2879 2880 for (size_t i = 0; i < 4; ++i) { 2881 FieldDecl *Field = FieldDecl::Create(*this, 2882 ObjCFastEnumerationStateTypeDecl, 2883 SourceLocation(), 0, 2884 FieldTypes[i], /*TInfo=*/0, 2885 /*BitWidth=*/0, 2886 /*Mutable=*/false); 2887 Field->setAccess(AS_public); 2888 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 2889 } 2890 2891 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 2892 } 2893 2894 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 2895} 2896 2897QualType ASTContext::getBlockDescriptorType() { 2898 if (BlockDescriptorType) 2899 return getTagDeclType(BlockDescriptorType); 2900 2901 RecordDecl *T; 2902 // FIXME: Needs the FlagAppleBlock bit. 2903 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2904 &Idents.get("__block_descriptor")); 2905 T->startDefinition(); 2906 2907 QualType FieldTypes[] = { 2908 UnsignedLongTy, 2909 UnsignedLongTy, 2910 }; 2911 2912 const char *FieldNames[] = { 2913 "reserved", 2914 "Size" 2915 }; 2916 2917 for (size_t i = 0; i < 2; ++i) { 2918 FieldDecl *Field = FieldDecl::Create(*this, 2919 T, 2920 SourceLocation(), 2921 &Idents.get(FieldNames[i]), 2922 FieldTypes[i], /*TInfo=*/0, 2923 /*BitWidth=*/0, 2924 /*Mutable=*/false); 2925 Field->setAccess(AS_public); 2926 T->addDecl(Field); 2927 } 2928 2929 T->completeDefinition(); 2930 2931 BlockDescriptorType = T; 2932 2933 return getTagDeclType(BlockDescriptorType); 2934} 2935 2936void ASTContext::setBlockDescriptorType(QualType T) { 2937 const RecordType *Rec = T->getAs<RecordType>(); 2938 assert(Rec && "Invalid BlockDescriptorType"); 2939 BlockDescriptorType = Rec->getDecl(); 2940} 2941 2942QualType ASTContext::getBlockDescriptorExtendedType() { 2943 if (BlockDescriptorExtendedType) 2944 return getTagDeclType(BlockDescriptorExtendedType); 2945 2946 RecordDecl *T; 2947 // FIXME: Needs the FlagAppleBlock bit. 2948 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2949 &Idents.get("__block_descriptor_withcopydispose")); 2950 T->startDefinition(); 2951 2952 QualType FieldTypes[] = { 2953 UnsignedLongTy, 2954 UnsignedLongTy, 2955 getPointerType(VoidPtrTy), 2956 getPointerType(VoidPtrTy) 2957 }; 2958 2959 const char *FieldNames[] = { 2960 "reserved", 2961 "Size", 2962 "CopyFuncPtr", 2963 "DestroyFuncPtr" 2964 }; 2965 2966 for (size_t i = 0; i < 4; ++i) { 2967 FieldDecl *Field = FieldDecl::Create(*this, 2968 T, 2969 SourceLocation(), 2970 &Idents.get(FieldNames[i]), 2971 FieldTypes[i], /*TInfo=*/0, 2972 /*BitWidth=*/0, 2973 /*Mutable=*/false); 2974 Field->setAccess(AS_public); 2975 T->addDecl(Field); 2976 } 2977 2978 T->completeDefinition(); 2979 2980 BlockDescriptorExtendedType = T; 2981 2982 return getTagDeclType(BlockDescriptorExtendedType); 2983} 2984 2985void ASTContext::setBlockDescriptorExtendedType(QualType T) { 2986 const RecordType *Rec = T->getAs<RecordType>(); 2987 assert(Rec && "Invalid BlockDescriptorType"); 2988 BlockDescriptorExtendedType = Rec->getDecl(); 2989} 2990 2991bool ASTContext::BlockRequiresCopying(QualType Ty) { 2992 if (Ty->isBlockPointerType()) 2993 return true; 2994 if (isObjCNSObjectType(Ty)) 2995 return true; 2996 if (Ty->isObjCObjectPointerType()) 2997 return true; 2998 return false; 2999} 3000 3001QualType ASTContext::BuildByRefType(const char *DeclName, QualType Ty) { 3002 // type = struct __Block_byref_1_X { 3003 // void *__isa; 3004 // struct __Block_byref_1_X *__forwarding; 3005 // unsigned int __flags; 3006 // unsigned int __size; 3007 // void *__copy_helper; // as needed 3008 // void *__destroy_help // as needed 3009 // int X; 3010 // } * 3011 3012 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3013 3014 // FIXME: Move up 3015 static unsigned int UniqueBlockByRefTypeID = 0; 3016 llvm::SmallString<36> Name; 3017 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3018 ++UniqueBlockByRefTypeID << '_' << DeclName; 3019 RecordDecl *T; 3020 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3021 &Idents.get(Name.str())); 3022 T->startDefinition(); 3023 QualType Int32Ty = IntTy; 3024 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3025 QualType FieldTypes[] = { 3026 getPointerType(VoidPtrTy), 3027 getPointerType(getTagDeclType(T)), 3028 Int32Ty, 3029 Int32Ty, 3030 getPointerType(VoidPtrTy), 3031 getPointerType(VoidPtrTy), 3032 Ty 3033 }; 3034 3035 const char *FieldNames[] = { 3036 "__isa", 3037 "__forwarding", 3038 "__flags", 3039 "__size", 3040 "__copy_helper", 3041 "__destroy_helper", 3042 DeclName, 3043 }; 3044 3045 for (size_t i = 0; i < 7; ++i) { 3046 if (!HasCopyAndDispose && i >=4 && i <= 5) 3047 continue; 3048 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3049 &Idents.get(FieldNames[i]), 3050 FieldTypes[i], /*TInfo=*/0, 3051 /*BitWidth=*/0, /*Mutable=*/false); 3052 Field->setAccess(AS_public); 3053 T->addDecl(Field); 3054 } 3055 3056 T->completeDefinition(); 3057 3058 return getPointerType(getTagDeclType(T)); 3059} 3060 3061 3062QualType ASTContext::getBlockParmType( 3063 bool BlockHasCopyDispose, 3064 llvm::SmallVector<const Expr *, 8> &BlockDeclRefDecls) { 3065 // FIXME: Move up 3066 static unsigned int UniqueBlockParmTypeID = 0; 3067 llvm::SmallString<36> Name; 3068 llvm::raw_svector_ostream(Name) << "__block_literal_" 3069 << ++UniqueBlockParmTypeID; 3070 RecordDecl *T; 3071 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3072 &Idents.get(Name.str())); 3073 T->startDefinition(); 3074 QualType FieldTypes[] = { 3075 getPointerType(VoidPtrTy), 3076 IntTy, 3077 IntTy, 3078 getPointerType(VoidPtrTy), 3079 (BlockHasCopyDispose ? 3080 getPointerType(getBlockDescriptorExtendedType()) : 3081 getPointerType(getBlockDescriptorType())) 3082 }; 3083 3084 const char *FieldNames[] = { 3085 "__isa", 3086 "__flags", 3087 "__reserved", 3088 "__FuncPtr", 3089 "__descriptor" 3090 }; 3091 3092 for (size_t i = 0; i < 5; ++i) { 3093 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3094 &Idents.get(FieldNames[i]), 3095 FieldTypes[i], /*TInfo=*/0, 3096 /*BitWidth=*/0, /*Mutable=*/false); 3097 Field->setAccess(AS_public); 3098 T->addDecl(Field); 3099 } 3100 3101 for (size_t i = 0; i < BlockDeclRefDecls.size(); ++i) { 3102 const Expr *E = BlockDeclRefDecls[i]; 3103 const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E); 3104 clang::IdentifierInfo *Name = 0; 3105 if (BDRE) { 3106 const ValueDecl *D = BDRE->getDecl(); 3107 Name = &Idents.get(D->getName()); 3108 } 3109 QualType FieldType = E->getType(); 3110 3111 if (BDRE && BDRE->isByRef()) 3112 FieldType = BuildByRefType(BDRE->getDecl()->getNameAsCString(), 3113 FieldType); 3114 3115 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3116 Name, FieldType, /*TInfo=*/0, 3117 /*BitWidth=*/0, /*Mutable=*/false); 3118 Field->setAccess(AS_public); 3119 T->addDecl(Field); 3120 } 3121 3122 T->completeDefinition(); 3123 3124 return getPointerType(getTagDeclType(T)); 3125} 3126 3127void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3128 const RecordType *Rec = T->getAs<RecordType>(); 3129 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3130 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3131} 3132 3133// This returns true if a type has been typedefed to BOOL: 3134// typedef <type> BOOL; 3135static bool isTypeTypedefedAsBOOL(QualType T) { 3136 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3137 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3138 return II->isStr("BOOL"); 3139 3140 return false; 3141} 3142 3143/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3144/// purpose. 3145CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) { 3146 CharUnits sz = getTypeSizeInChars(type); 3147 3148 // Make all integer and enum types at least as large as an int 3149 if (sz.isPositive() && type->isIntegralType()) 3150 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3151 // Treat arrays as pointers, since that's how they're passed in. 3152 else if (type->isArrayType()) 3153 sz = getTypeSizeInChars(VoidPtrTy); 3154 return sz; 3155} 3156 3157static inline 3158std::string charUnitsToString(const CharUnits &CU) { 3159 return llvm::itostr(CU.getQuantity()); 3160} 3161 3162/// getObjCEncodingForBlockDecl - Return the encoded type for this block 3163/// declaration. 3164void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3165 std::string& S) { 3166 const BlockDecl *Decl = Expr->getBlockDecl(); 3167 QualType BlockTy = 3168 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3169 // Encode result type. 3170 getObjCEncodingForType(cast<FunctionType>(BlockTy)->getResultType(), S); 3171 // Compute size of all parameters. 3172 // Start with computing size of a pointer in number of bytes. 3173 // FIXME: There might(should) be a better way of doing this computation! 3174 SourceLocation Loc; 3175 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3176 CharUnits ParmOffset = PtrSize; 3177 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3178 E = Decl->param_end(); PI != E; ++PI) { 3179 QualType PType = (*PI)->getType(); 3180 CharUnits sz = getObjCEncodingTypeSize(PType); 3181 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3182 ParmOffset += sz; 3183 } 3184 // Size of the argument frame 3185 S += charUnitsToString(ParmOffset); 3186 // Block pointer and offset. 3187 S += "@?0"; 3188 ParmOffset = PtrSize; 3189 3190 // Argument types. 3191 ParmOffset = PtrSize; 3192 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3193 Decl->param_end(); PI != E; ++PI) { 3194 ParmVarDecl *PVDecl = *PI; 3195 QualType PType = PVDecl->getOriginalType(); 3196 if (const ArrayType *AT = 3197 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3198 // Use array's original type only if it has known number of 3199 // elements. 3200 if (!isa<ConstantArrayType>(AT)) 3201 PType = PVDecl->getType(); 3202 } else if (PType->isFunctionType()) 3203 PType = PVDecl->getType(); 3204 getObjCEncodingForType(PType, S); 3205 S += charUnitsToString(ParmOffset); 3206 ParmOffset += getObjCEncodingTypeSize(PType); 3207 } 3208} 3209 3210/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3211/// declaration. 3212void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3213 std::string& S) { 3214 // FIXME: This is not very efficient. 3215 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3216 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3217 // Encode result type. 3218 getObjCEncodingForType(Decl->getResultType(), S); 3219 // Compute size of all parameters. 3220 // Start with computing size of a pointer in number of bytes. 3221 // FIXME: There might(should) be a better way of doing this computation! 3222 SourceLocation Loc; 3223 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3224 // The first two arguments (self and _cmd) are pointers; account for 3225 // their size. 3226 CharUnits ParmOffset = 2 * PtrSize; 3227 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3228 E = Decl->sel_param_end(); PI != E; ++PI) { 3229 QualType PType = (*PI)->getType(); 3230 CharUnits sz = getObjCEncodingTypeSize(PType); 3231 assert (sz.isPositive() && 3232 "getObjCEncodingForMethodDecl - Incomplete param type"); 3233 ParmOffset += sz; 3234 } 3235 S += charUnitsToString(ParmOffset); 3236 S += "@0:"; 3237 S += charUnitsToString(PtrSize); 3238 3239 // Argument types. 3240 ParmOffset = 2 * PtrSize; 3241 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3242 E = Decl->sel_param_end(); PI != E; ++PI) { 3243 ParmVarDecl *PVDecl = *PI; 3244 QualType PType = PVDecl->getOriginalType(); 3245 if (const ArrayType *AT = 3246 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3247 // Use array's original type only if it has known number of 3248 // elements. 3249 if (!isa<ConstantArrayType>(AT)) 3250 PType = PVDecl->getType(); 3251 } else if (PType->isFunctionType()) 3252 PType = PVDecl->getType(); 3253 // Process argument qualifiers for user supplied arguments; such as, 3254 // 'in', 'inout', etc. 3255 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3256 getObjCEncodingForType(PType, S); 3257 S += charUnitsToString(ParmOffset); 3258 ParmOffset += getObjCEncodingTypeSize(PType); 3259 } 3260} 3261 3262/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3263/// property declaration. If non-NULL, Container must be either an 3264/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3265/// NULL when getting encodings for protocol properties. 3266/// Property attributes are stored as a comma-delimited C string. The simple 3267/// attributes readonly and bycopy are encoded as single characters. The 3268/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3269/// encoded as single characters, followed by an identifier. Property types 3270/// are also encoded as a parametrized attribute. The characters used to encode 3271/// these attributes are defined by the following enumeration: 3272/// @code 3273/// enum PropertyAttributes { 3274/// kPropertyReadOnly = 'R', // property is read-only. 3275/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3276/// kPropertyByref = '&', // property is a reference to the value last assigned 3277/// kPropertyDynamic = 'D', // property is dynamic 3278/// kPropertyGetter = 'G', // followed by getter selector name 3279/// kPropertySetter = 'S', // followed by setter selector name 3280/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3281/// kPropertyType = 't' // followed by old-style type encoding. 3282/// kPropertyWeak = 'W' // 'weak' property 3283/// kPropertyStrong = 'P' // property GC'able 3284/// kPropertyNonAtomic = 'N' // property non-atomic 3285/// }; 3286/// @endcode 3287void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3288 const Decl *Container, 3289 std::string& S) { 3290 // Collect information from the property implementation decl(s). 3291 bool Dynamic = false; 3292 ObjCPropertyImplDecl *SynthesizePID = 0; 3293 3294 // FIXME: Duplicated code due to poor abstraction. 3295 if (Container) { 3296 if (const ObjCCategoryImplDecl *CID = 3297 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3298 for (ObjCCategoryImplDecl::propimpl_iterator 3299 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3300 i != e; ++i) { 3301 ObjCPropertyImplDecl *PID = *i; 3302 if (PID->getPropertyDecl() == PD) { 3303 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3304 Dynamic = true; 3305 } else { 3306 SynthesizePID = PID; 3307 } 3308 } 3309 } 3310 } else { 3311 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3312 for (ObjCCategoryImplDecl::propimpl_iterator 3313 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3314 i != e; ++i) { 3315 ObjCPropertyImplDecl *PID = *i; 3316 if (PID->getPropertyDecl() == PD) { 3317 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3318 Dynamic = true; 3319 } else { 3320 SynthesizePID = PID; 3321 } 3322 } 3323 } 3324 } 3325 } 3326 3327 // FIXME: This is not very efficient. 3328 S = "T"; 3329 3330 // Encode result type. 3331 // GCC has some special rules regarding encoding of properties which 3332 // closely resembles encoding of ivars. 3333 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3334 true /* outermost type */, 3335 true /* encoding for property */); 3336 3337 if (PD->isReadOnly()) { 3338 S += ",R"; 3339 } else { 3340 switch (PD->getSetterKind()) { 3341 case ObjCPropertyDecl::Assign: break; 3342 case ObjCPropertyDecl::Copy: S += ",C"; break; 3343 case ObjCPropertyDecl::Retain: S += ",&"; break; 3344 } 3345 } 3346 3347 // It really isn't clear at all what this means, since properties 3348 // are "dynamic by default". 3349 if (Dynamic) 3350 S += ",D"; 3351 3352 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3353 S += ",N"; 3354 3355 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3356 S += ",G"; 3357 S += PD->getGetterName().getAsString(); 3358 } 3359 3360 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3361 S += ",S"; 3362 S += PD->getSetterName().getAsString(); 3363 } 3364 3365 if (SynthesizePID) { 3366 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3367 S += ",V"; 3368 S += OID->getNameAsString(); 3369 } 3370 3371 // FIXME: OBJCGC: weak & strong 3372} 3373 3374/// getLegacyIntegralTypeEncoding - 3375/// Another legacy compatibility encoding: 32-bit longs are encoded as 3376/// 'l' or 'L' , but not always. For typedefs, we need to use 3377/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3378/// 3379void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3380 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3381 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3382 if (BT->getKind() == BuiltinType::ULong && 3383 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3384 PointeeTy = UnsignedIntTy; 3385 else 3386 if (BT->getKind() == BuiltinType::Long && 3387 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3388 PointeeTy = IntTy; 3389 } 3390 } 3391} 3392 3393void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3394 const FieldDecl *Field) { 3395 // We follow the behavior of gcc, expanding structures which are 3396 // directly pointed to, and expanding embedded structures. Note that 3397 // these rules are sufficient to prevent recursive encoding of the 3398 // same type. 3399 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3400 true /* outermost type */); 3401} 3402 3403static void EncodeBitField(const ASTContext *Context, std::string& S, 3404 const FieldDecl *FD) { 3405 const Expr *E = FD->getBitWidth(); 3406 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3407 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3408 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3409 S += 'b'; 3410 S += llvm::utostr(N); 3411} 3412 3413// FIXME: Use SmallString for accumulating string. 3414void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3415 bool ExpandPointedToStructures, 3416 bool ExpandStructures, 3417 const FieldDecl *FD, 3418 bool OutermostType, 3419 bool EncodingProperty) { 3420 if (const BuiltinType *BT = T->getAs<BuiltinType>()) { 3421 if (FD && FD->isBitField()) 3422 return EncodeBitField(this, S, FD); 3423 char encoding; 3424 switch (BT->getKind()) { 3425 default: assert(0 && "Unhandled builtin type kind"); 3426 case BuiltinType::Void: encoding = 'v'; break; 3427 case BuiltinType::Bool: encoding = 'B'; break; 3428 case BuiltinType::Char_U: 3429 case BuiltinType::UChar: encoding = 'C'; break; 3430 case BuiltinType::UShort: encoding = 'S'; break; 3431 case BuiltinType::UInt: encoding = 'I'; break; 3432 case BuiltinType::ULong: 3433 encoding = 3434 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3435 break; 3436 case BuiltinType::UInt128: encoding = 'T'; break; 3437 case BuiltinType::ULongLong: encoding = 'Q'; break; 3438 case BuiltinType::Char_S: 3439 case BuiltinType::SChar: encoding = 'c'; break; 3440 case BuiltinType::Short: encoding = 's'; break; 3441 case BuiltinType::Int: encoding = 'i'; break; 3442 case BuiltinType::Long: 3443 encoding = 3444 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'l' : 'q'; 3445 break; 3446 case BuiltinType::LongLong: encoding = 'q'; break; 3447 case BuiltinType::Int128: encoding = 't'; break; 3448 case BuiltinType::Float: encoding = 'f'; break; 3449 case BuiltinType::Double: encoding = 'd'; break; 3450 case BuiltinType::LongDouble: encoding = 'd'; break; 3451 } 3452 3453 S += encoding; 3454 return; 3455 } 3456 3457 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3458 S += 'j'; 3459 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3460 false); 3461 return; 3462 } 3463 3464 // encoding for pointer or r3eference types. 3465 QualType PointeeTy; 3466 if (const PointerType *PT = T->getAs<PointerType>()) { 3467 if (PT->isObjCSelType()) { 3468 S += ':'; 3469 return; 3470 } 3471 PointeeTy = PT->getPointeeType(); 3472 } 3473 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3474 PointeeTy = RT->getPointeeType(); 3475 if (!PointeeTy.isNull()) { 3476 bool isReadOnly = false; 3477 // For historical/compatibility reasons, the read-only qualifier of the 3478 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3479 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3480 // Also, do not emit the 'r' for anything but the outermost type! 3481 if (isa<TypedefType>(T.getTypePtr())) { 3482 if (OutermostType && T.isConstQualified()) { 3483 isReadOnly = true; 3484 S += 'r'; 3485 } 3486 } else if (OutermostType) { 3487 QualType P = PointeeTy; 3488 while (P->getAs<PointerType>()) 3489 P = P->getAs<PointerType>()->getPointeeType(); 3490 if (P.isConstQualified()) { 3491 isReadOnly = true; 3492 S += 'r'; 3493 } 3494 } 3495 if (isReadOnly) { 3496 // Another legacy compatibility encoding. Some ObjC qualifier and type 3497 // combinations need to be rearranged. 3498 // Rewrite "in const" from "nr" to "rn" 3499 if (llvm::StringRef(S).endswith("nr")) 3500 S.replace(S.end()-2, S.end(), "rn"); 3501 } 3502 3503 if (PointeeTy->isCharType()) { 3504 // char pointer types should be encoded as '*' unless it is a 3505 // type that has been typedef'd to 'BOOL'. 3506 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3507 S += '*'; 3508 return; 3509 } 3510 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3511 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3512 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3513 S += '#'; 3514 return; 3515 } 3516 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3517 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3518 S += '@'; 3519 return; 3520 } 3521 // fall through... 3522 } 3523 S += '^'; 3524 getLegacyIntegralTypeEncoding(PointeeTy); 3525 3526 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3527 NULL); 3528 return; 3529 } 3530 3531 if (const ArrayType *AT = 3532 // Ignore type qualifiers etc. 3533 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3534 if (isa<IncompleteArrayType>(AT)) { 3535 // Incomplete arrays are encoded as a pointer to the array element. 3536 S += '^'; 3537 3538 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3539 false, ExpandStructures, FD); 3540 } else { 3541 S += '['; 3542 3543 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3544 S += llvm::utostr(CAT->getSize().getZExtValue()); 3545 else { 3546 //Variable length arrays are encoded as a regular array with 0 elements. 3547 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3548 S += '0'; 3549 } 3550 3551 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3552 false, ExpandStructures, FD); 3553 S += ']'; 3554 } 3555 return; 3556 } 3557 3558 if (T->getAs<FunctionType>()) { 3559 S += '?'; 3560 return; 3561 } 3562 3563 if (const RecordType *RTy = T->getAs<RecordType>()) { 3564 RecordDecl *RDecl = RTy->getDecl(); 3565 S += RDecl->isUnion() ? '(' : '{'; 3566 // Anonymous structures print as '?' 3567 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3568 S += II->getName(); 3569 if (ClassTemplateSpecializationDecl *Spec 3570 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 3571 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 3572 std::string TemplateArgsStr 3573 = TemplateSpecializationType::PrintTemplateArgumentList( 3574 TemplateArgs.getFlatArgumentList(), 3575 TemplateArgs.flat_size(), 3576 (*this).PrintingPolicy); 3577 3578 S += TemplateArgsStr; 3579 } 3580 } else { 3581 S += '?'; 3582 } 3583 if (ExpandStructures) { 3584 S += '='; 3585 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3586 FieldEnd = RDecl->field_end(); 3587 Field != FieldEnd; ++Field) { 3588 if (FD) { 3589 S += '"'; 3590 S += Field->getNameAsString(); 3591 S += '"'; 3592 } 3593 3594 // Special case bit-fields. 3595 if (Field->isBitField()) { 3596 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3597 (*Field)); 3598 } else { 3599 QualType qt = Field->getType(); 3600 getLegacyIntegralTypeEncoding(qt); 3601 getObjCEncodingForTypeImpl(qt, S, false, true, 3602 FD); 3603 } 3604 } 3605 } 3606 S += RDecl->isUnion() ? ')' : '}'; 3607 return; 3608 } 3609 3610 if (T->isEnumeralType()) { 3611 if (FD && FD->isBitField()) 3612 EncodeBitField(this, S, FD); 3613 else 3614 S += 'i'; 3615 return; 3616 } 3617 3618 if (T->isBlockPointerType()) { 3619 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3620 return; 3621 } 3622 3623 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3624 // @encode(class_name) 3625 ObjCInterfaceDecl *OI = OIT->getDecl(); 3626 S += '{'; 3627 const IdentifierInfo *II = OI->getIdentifier(); 3628 S += II->getName(); 3629 S += '='; 3630 llvm::SmallVector<FieldDecl*, 32> RecFields; 3631 CollectObjCIvars(OI, RecFields); 3632 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 3633 if (RecFields[i]->isBitField()) 3634 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3635 RecFields[i]); 3636 else 3637 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3638 FD); 3639 } 3640 S += '}'; 3641 return; 3642 } 3643 3644 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 3645 if (OPT->isObjCIdType()) { 3646 S += '@'; 3647 return; 3648 } 3649 3650 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 3651 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 3652 // Since this is a binary compatibility issue, need to consult with runtime 3653 // folks. Fortunately, this is a *very* obsure construct. 3654 S += '#'; 3655 return; 3656 } 3657 3658 if (OPT->isObjCQualifiedIdType()) { 3659 getObjCEncodingForTypeImpl(getObjCIdType(), S, 3660 ExpandPointedToStructures, 3661 ExpandStructures, FD); 3662 if (FD || EncodingProperty) { 3663 // Note that we do extended encoding of protocol qualifer list 3664 // Only when doing ivar or property encoding. 3665 S += '"'; 3666 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3667 E = OPT->qual_end(); I != E; ++I) { 3668 S += '<'; 3669 S += (*I)->getNameAsString(); 3670 S += '>'; 3671 } 3672 S += '"'; 3673 } 3674 return; 3675 } 3676 3677 QualType PointeeTy = OPT->getPointeeType(); 3678 if (!EncodingProperty && 3679 isa<TypedefType>(PointeeTy.getTypePtr())) { 3680 // Another historical/compatibility reason. 3681 // We encode the underlying type which comes out as 3682 // {...}; 3683 S += '^'; 3684 getObjCEncodingForTypeImpl(PointeeTy, S, 3685 false, ExpandPointedToStructures, 3686 NULL); 3687 return; 3688 } 3689 3690 S += '@'; 3691 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 3692 S += '"'; 3693 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 3694 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3695 E = OPT->qual_end(); I != E; ++I) { 3696 S += '<'; 3697 S += (*I)->getNameAsString(); 3698 S += '>'; 3699 } 3700 S += '"'; 3701 } 3702 return; 3703 } 3704 3705 assert(0 && "@encode for type not implemented!"); 3706} 3707 3708void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 3709 std::string& S) const { 3710 if (QT & Decl::OBJC_TQ_In) 3711 S += 'n'; 3712 if (QT & Decl::OBJC_TQ_Inout) 3713 S += 'N'; 3714 if (QT & Decl::OBJC_TQ_Out) 3715 S += 'o'; 3716 if (QT & Decl::OBJC_TQ_Bycopy) 3717 S += 'O'; 3718 if (QT & Decl::OBJC_TQ_Byref) 3719 S += 'R'; 3720 if (QT & Decl::OBJC_TQ_Oneway) 3721 S += 'V'; 3722} 3723 3724void ASTContext::setBuiltinVaListType(QualType T) { 3725 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 3726 3727 BuiltinVaListType = T; 3728} 3729 3730void ASTContext::setObjCIdType(QualType T) { 3731 ObjCIdTypedefType = T; 3732} 3733 3734void ASTContext::setObjCSelType(QualType T) { 3735 ObjCSelTypedefType = T; 3736} 3737 3738void ASTContext::setObjCProtoType(QualType QT) { 3739 ObjCProtoType = QT; 3740} 3741 3742void ASTContext::setObjCClassType(QualType T) { 3743 ObjCClassTypedefType = T; 3744} 3745 3746void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 3747 assert(ObjCConstantStringType.isNull() && 3748 "'NSConstantString' type already set!"); 3749 3750 ObjCConstantStringType = getObjCInterfaceType(Decl); 3751} 3752 3753/// \brief Retrieve the template name that corresponds to a non-empty 3754/// lookup. 3755TemplateName ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 3756 UnresolvedSetIterator End) { 3757 unsigned size = End - Begin; 3758 assert(size > 1 && "set is not overloaded!"); 3759 3760 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 3761 size * sizeof(FunctionTemplateDecl*)); 3762 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 3763 3764 NamedDecl **Storage = OT->getStorage(); 3765 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 3766 NamedDecl *D = *I; 3767 assert(isa<FunctionTemplateDecl>(D) || 3768 (isa<UsingShadowDecl>(D) && 3769 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 3770 *Storage++ = D; 3771 } 3772 3773 return TemplateName(OT); 3774} 3775 3776/// \brief Retrieve the template name that represents a qualified 3777/// template name such as \c std::vector. 3778TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 3779 bool TemplateKeyword, 3780 TemplateDecl *Template) { 3781 // FIXME: Canonicalization? 3782 llvm::FoldingSetNodeID ID; 3783 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 3784 3785 void *InsertPos = 0; 3786 QualifiedTemplateName *QTN = 3787 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3788 if (!QTN) { 3789 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 3790 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 3791 } 3792 3793 return TemplateName(QTN); 3794} 3795 3796/// \brief Retrieve the template name that represents a dependent 3797/// template name such as \c MetaFun::template apply. 3798TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3799 const IdentifierInfo *Name) { 3800 assert((!NNS || NNS->isDependent()) && 3801 "Nested name specifier must be dependent"); 3802 3803 llvm::FoldingSetNodeID ID; 3804 DependentTemplateName::Profile(ID, NNS, Name); 3805 3806 void *InsertPos = 0; 3807 DependentTemplateName *QTN = 3808 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3809 3810 if (QTN) 3811 return TemplateName(QTN); 3812 3813 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3814 if (CanonNNS == NNS) { 3815 QTN = new (*this,4) DependentTemplateName(NNS, Name); 3816 } else { 3817 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 3818 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 3819 DependentTemplateName *CheckQTN = 3820 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3821 assert(!CheckQTN && "Dependent type name canonicalization broken"); 3822 (void)CheckQTN; 3823 } 3824 3825 DependentTemplateNames.InsertNode(QTN, InsertPos); 3826 return TemplateName(QTN); 3827} 3828 3829/// \brief Retrieve the template name that represents a dependent 3830/// template name such as \c MetaFun::template operator+. 3831TemplateName 3832ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3833 OverloadedOperatorKind Operator) { 3834 assert((!NNS || NNS->isDependent()) && 3835 "Nested name specifier must be dependent"); 3836 3837 llvm::FoldingSetNodeID ID; 3838 DependentTemplateName::Profile(ID, NNS, Operator); 3839 3840 void *InsertPos = 0; 3841 DependentTemplateName *QTN 3842 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3843 3844 if (QTN) 3845 return TemplateName(QTN); 3846 3847 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3848 if (CanonNNS == NNS) { 3849 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 3850 } else { 3851 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 3852 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 3853 3854 DependentTemplateName *CheckQTN 3855 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3856 assert(!CheckQTN && "Dependent template name canonicalization broken"); 3857 (void)CheckQTN; 3858 } 3859 3860 DependentTemplateNames.InsertNode(QTN, InsertPos); 3861 return TemplateName(QTN); 3862} 3863 3864/// getFromTargetType - Given one of the integer types provided by 3865/// TargetInfo, produce the corresponding type. The unsigned @p Type 3866/// is actually a value of type @c TargetInfo::IntType. 3867CanQualType ASTContext::getFromTargetType(unsigned Type) const { 3868 switch (Type) { 3869 case TargetInfo::NoInt: return CanQualType(); 3870 case TargetInfo::SignedShort: return ShortTy; 3871 case TargetInfo::UnsignedShort: return UnsignedShortTy; 3872 case TargetInfo::SignedInt: return IntTy; 3873 case TargetInfo::UnsignedInt: return UnsignedIntTy; 3874 case TargetInfo::SignedLong: return LongTy; 3875 case TargetInfo::UnsignedLong: return UnsignedLongTy; 3876 case TargetInfo::SignedLongLong: return LongLongTy; 3877 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 3878 } 3879 3880 assert(false && "Unhandled TargetInfo::IntType value"); 3881 return CanQualType(); 3882} 3883 3884//===----------------------------------------------------------------------===// 3885// Type Predicates. 3886//===----------------------------------------------------------------------===// 3887 3888/// isObjCNSObjectType - Return true if this is an NSObject object using 3889/// NSObject attribute on a c-style pointer type. 3890/// FIXME - Make it work directly on types. 3891/// FIXME: Move to Type. 3892/// 3893bool ASTContext::isObjCNSObjectType(QualType Ty) const { 3894 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 3895 if (TypedefDecl *TD = TDT->getDecl()) 3896 if (TD->getAttr<ObjCNSObjectAttr>()) 3897 return true; 3898 } 3899 return false; 3900} 3901 3902/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 3903/// garbage collection attribute. 3904/// 3905Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 3906 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 3907 if (getLangOptions().ObjC1 && 3908 getLangOptions().getGCMode() != LangOptions::NonGC) { 3909 GCAttrs = Ty.getObjCGCAttr(); 3910 // Default behavious under objective-c's gc is for objective-c pointers 3911 // (or pointers to them) be treated as though they were declared 3912 // as __strong. 3913 if (GCAttrs == Qualifiers::GCNone) { 3914 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 3915 GCAttrs = Qualifiers::Strong; 3916 else if (Ty->isPointerType()) 3917 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 3918 } 3919 // Non-pointers have none gc'able attribute regardless of the attribute 3920 // set on them. 3921 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 3922 return Qualifiers::GCNone; 3923 } 3924 return GCAttrs; 3925} 3926 3927//===----------------------------------------------------------------------===// 3928// Type Compatibility Testing 3929//===----------------------------------------------------------------------===// 3930 3931/// areCompatVectorTypes - Return true if the two specified vector types are 3932/// compatible. 3933static bool areCompatVectorTypes(const VectorType *LHS, 3934 const VectorType *RHS) { 3935 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 3936 return LHS->getElementType() == RHS->getElementType() && 3937 LHS->getNumElements() == RHS->getNumElements(); 3938} 3939 3940//===----------------------------------------------------------------------===// 3941// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 3942//===----------------------------------------------------------------------===// 3943 3944/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 3945/// inheritance hierarchy of 'rProto'. 3946bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 3947 ObjCProtocolDecl *rProto) { 3948 if (lProto == rProto) 3949 return true; 3950 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 3951 E = rProto->protocol_end(); PI != E; ++PI) 3952 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 3953 return true; 3954 return false; 3955} 3956 3957/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 3958/// return true if lhs's protocols conform to rhs's protocol; false 3959/// otherwise. 3960bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 3961 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 3962 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 3963 return false; 3964} 3965 3966/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 3967/// ObjCQualifiedIDType. 3968bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 3969 bool compare) { 3970 // Allow id<P..> and an 'id' or void* type in all cases. 3971 if (lhs->isVoidPointerType() || 3972 lhs->isObjCIdType() || lhs->isObjCClassType()) 3973 return true; 3974 else if (rhs->isVoidPointerType() || 3975 rhs->isObjCIdType() || rhs->isObjCClassType()) 3976 return true; 3977 3978 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 3979 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 3980 3981 if (!rhsOPT) return false; 3982 3983 if (rhsOPT->qual_empty()) { 3984 // If the RHS is a unqualified interface pointer "NSString*", 3985 // make sure we check the class hierarchy. 3986 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 3987 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 3988 E = lhsQID->qual_end(); I != E; ++I) { 3989 // when comparing an id<P> on lhs with a static type on rhs, 3990 // see if static class implements all of id's protocols, directly or 3991 // through its super class and categories. 3992 if (!rhsID->ClassImplementsProtocol(*I, true)) 3993 return false; 3994 } 3995 } 3996 // If there are no qualifiers and no interface, we have an 'id'. 3997 return true; 3998 } 3999 // Both the right and left sides have qualifiers. 4000 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4001 E = lhsQID->qual_end(); I != E; ++I) { 4002 ObjCProtocolDecl *lhsProto = *I; 4003 bool match = false; 4004 4005 // when comparing an id<P> on lhs with a static type on rhs, 4006 // see if static class implements all of id's protocols, directly or 4007 // through its super class and categories. 4008 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4009 E = rhsOPT->qual_end(); J != E; ++J) { 4010 ObjCProtocolDecl *rhsProto = *J; 4011 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4012 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4013 match = true; 4014 break; 4015 } 4016 } 4017 // If the RHS is a qualified interface pointer "NSString<P>*", 4018 // make sure we check the class hierarchy. 4019 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4020 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4021 E = lhsQID->qual_end(); I != E; ++I) { 4022 // when comparing an id<P> on lhs with a static type on rhs, 4023 // see if static class implements all of id's protocols, directly or 4024 // through its super class and categories. 4025 if (rhsID->ClassImplementsProtocol(*I, true)) { 4026 match = true; 4027 break; 4028 } 4029 } 4030 } 4031 if (!match) 4032 return false; 4033 } 4034 4035 return true; 4036 } 4037 4038 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4039 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4040 4041 if (const ObjCObjectPointerType *lhsOPT = 4042 lhs->getAsObjCInterfacePointerType()) { 4043 if (lhsOPT->qual_empty()) { 4044 bool match = false; 4045 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4046 for (ObjCObjectPointerType::qual_iterator I = rhsQID->qual_begin(), 4047 E = rhsQID->qual_end(); I != E; ++I) { 4048 // when comparing an id<P> on lhs with a static type on rhs, 4049 // see if static class implements all of id's protocols, directly or 4050 // through its super class and categories. 4051 if (lhsID->ClassImplementsProtocol(*I, true)) { 4052 match = true; 4053 break; 4054 } 4055 } 4056 if (!match) 4057 return false; 4058 } 4059 return true; 4060 } 4061 // Both the right and left sides have qualifiers. 4062 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4063 E = lhsOPT->qual_end(); I != E; ++I) { 4064 ObjCProtocolDecl *lhsProto = *I; 4065 bool match = false; 4066 4067 // when comparing an id<P> on lhs with a static type on rhs, 4068 // see if static class implements all of id's protocols, directly or 4069 // through its super class and categories. 4070 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4071 E = rhsQID->qual_end(); J != E; ++J) { 4072 ObjCProtocolDecl *rhsProto = *J; 4073 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4074 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4075 match = true; 4076 break; 4077 } 4078 } 4079 if (!match) 4080 return false; 4081 } 4082 return true; 4083 } 4084 return false; 4085} 4086 4087/// canAssignObjCInterfaces - Return true if the two interface types are 4088/// compatible for assignment from RHS to LHS. This handles validation of any 4089/// protocol qualifiers on the LHS or RHS. 4090/// 4091bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4092 const ObjCObjectPointerType *RHSOPT) { 4093 // If either type represents the built-in 'id' or 'Class' types, return true. 4094 if (LHSOPT->isObjCBuiltinType() || RHSOPT->isObjCBuiltinType()) 4095 return true; 4096 4097 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4098 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4099 QualType(RHSOPT,0), 4100 false); 4101 4102 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4103 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4104 if (LHS && RHS) // We have 2 user-defined types. 4105 return canAssignObjCInterfaces(LHS, RHS); 4106 4107 return false; 4108} 4109 4110/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4111/// for providing type-safty for objective-c pointers used to pass/return 4112/// arguments in block literals. When passed as arguments, passing 'A*' where 4113/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4114/// not OK. For the return type, the opposite is not OK. 4115bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4116 const ObjCObjectPointerType *LHSOPT, 4117 const ObjCObjectPointerType *RHSOPT) { 4118 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4119 return true; 4120 4121 if (LHSOPT->isObjCBuiltinType()) { 4122 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4123 } 4124 4125 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4126 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4127 QualType(RHSOPT,0), 4128 false); 4129 4130 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4131 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4132 if (LHS && RHS) { // We have 2 user-defined types. 4133 if (LHS != RHS) { 4134 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4135 return false; 4136 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4137 return true; 4138 } 4139 else 4140 return true; 4141 } 4142 return false; 4143} 4144 4145/// getIntersectionOfProtocols - This routine finds the intersection of set 4146/// of protocols inherited from two distinct objective-c pointer objects. 4147/// It is used to build composite qualifier list of the composite type of 4148/// the conditional expression involving two objective-c pointer objects. 4149static 4150void getIntersectionOfProtocols(ASTContext &Context, 4151 const ObjCObjectPointerType *LHSOPT, 4152 const ObjCObjectPointerType *RHSOPT, 4153 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4154 4155 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4156 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4157 4158 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4159 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4160 if (LHSNumProtocols > 0) 4161 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4162 else { 4163 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4164 Context.CollectInheritedProtocols(LHS->getDecl(), LHSInheritedProtocols); 4165 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4166 LHSInheritedProtocols.end()); 4167 } 4168 4169 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4170 if (RHSNumProtocols > 0) { 4171 ObjCProtocolDecl **RHSProtocols = 4172 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4173 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4174 if (InheritedProtocolSet.count(RHSProtocols[i])) 4175 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4176 } 4177 else { 4178 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4179 Context.CollectInheritedProtocols(RHS->getDecl(), RHSInheritedProtocols); 4180 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4181 RHSInheritedProtocols.begin(), 4182 E = RHSInheritedProtocols.end(); I != E; ++I) 4183 if (InheritedProtocolSet.count((*I))) 4184 IntersectionOfProtocols.push_back((*I)); 4185 } 4186} 4187 4188/// areCommonBaseCompatible - Returns common base class of the two classes if 4189/// one found. Note that this is O'2 algorithm. But it will be called as the 4190/// last type comparison in a ?-exp of ObjC pointer types before a 4191/// warning is issued. So, its invokation is extremely rare. 4192QualType ASTContext::areCommonBaseCompatible( 4193 const ObjCObjectPointerType *LHSOPT, 4194 const ObjCObjectPointerType *RHSOPT) { 4195 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4196 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4197 if (!LHS || !RHS) 4198 return QualType(); 4199 4200 while (const ObjCInterfaceDecl *LHSIDecl = LHS->getDecl()->getSuperClass()) { 4201 QualType LHSTy = getObjCInterfaceType(LHSIDecl); 4202 LHS = LHSTy->getAs<ObjCInterfaceType>(); 4203 if (canAssignObjCInterfaces(LHS, RHS)) { 4204 llvm::SmallVector<ObjCProtocolDecl *, 8> IntersectionOfProtocols; 4205 getIntersectionOfProtocols(*this, 4206 LHSOPT, RHSOPT, IntersectionOfProtocols); 4207 if (IntersectionOfProtocols.empty()) 4208 LHSTy = getObjCObjectPointerType(LHSTy); 4209 else 4210 LHSTy = getObjCObjectPointerType(LHSTy, &IntersectionOfProtocols[0], 4211 IntersectionOfProtocols.size()); 4212 return LHSTy; 4213 } 4214 } 4215 4216 return QualType(); 4217} 4218 4219bool ASTContext::canAssignObjCInterfaces(const ObjCInterfaceType *LHS, 4220 const ObjCInterfaceType *RHS) { 4221 // Verify that the base decls are compatible: the RHS must be a subclass of 4222 // the LHS. 4223 if (!LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4224 return false; 4225 4226 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4227 // protocol qualified at all, then we are good. 4228 if (LHS->getNumProtocols() == 0) 4229 return true; 4230 4231 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4232 // isn't a superset. 4233 if (RHS->getNumProtocols() == 0) 4234 return true; // FIXME: should return false! 4235 4236 for (ObjCInterfaceType::qual_iterator LHSPI = LHS->qual_begin(), 4237 LHSPE = LHS->qual_end(); 4238 LHSPI != LHSPE; LHSPI++) { 4239 bool RHSImplementsProtocol = false; 4240 4241 // If the RHS doesn't implement the protocol on the left, the types 4242 // are incompatible. 4243 for (ObjCInterfaceType::qual_iterator RHSPI = RHS->qual_begin(), 4244 RHSPE = RHS->qual_end(); 4245 RHSPI != RHSPE; RHSPI++) { 4246 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4247 RHSImplementsProtocol = true; 4248 break; 4249 } 4250 } 4251 // FIXME: For better diagnostics, consider passing back the protocol name. 4252 if (!RHSImplementsProtocol) 4253 return false; 4254 } 4255 // The RHS implements all protocols listed on the LHS. 4256 return true; 4257} 4258 4259bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4260 // get the "pointed to" types 4261 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4262 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4263 4264 if (!LHSOPT || !RHSOPT) 4265 return false; 4266 4267 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4268 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4269} 4270 4271/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4272/// both shall have the identically qualified version of a compatible type. 4273/// C99 6.2.7p1: Two types have compatible types if their types are the 4274/// same. See 6.7.[2,3,5] for additional rules. 4275bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 4276 if (getLangOptions().CPlusPlus) 4277 return hasSameType(LHS, RHS); 4278 4279 return !mergeTypes(LHS, RHS).isNull(); 4280} 4281 4282bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 4283 return !mergeTypes(LHS, RHS, true).isNull(); 4284} 4285 4286QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 4287 bool OfBlockPointer) { 4288 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4289 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4290 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4291 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4292 bool allLTypes = true; 4293 bool allRTypes = true; 4294 4295 // Check return type 4296 QualType retType; 4297 if (OfBlockPointer) 4298 retType = mergeTypes(rbase->getResultType(), lbase->getResultType(), true); 4299 else 4300 retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 4301 if (retType.isNull()) return QualType(); 4302 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 4303 allLTypes = false; 4304 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 4305 allRTypes = false; 4306 // FIXME: double check this 4307 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 4308 // rbase->getRegParmAttr() != 0 && 4309 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 4310 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 4311 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 4312 unsigned RegParm = lbaseInfo.getRegParm() == 0 ? rbaseInfo.getRegParm() : 4313 lbaseInfo.getRegParm(); 4314 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 4315 if (NoReturn != lbaseInfo.getNoReturn() || 4316 RegParm != lbaseInfo.getRegParm()) 4317 allLTypes = false; 4318 if (NoReturn != rbaseInfo.getNoReturn() || 4319 RegParm != rbaseInfo.getRegParm()) 4320 allRTypes = false; 4321 CallingConv lcc = lbaseInfo.getCC(); 4322 CallingConv rcc = rbaseInfo.getCC(); 4323 // Compatible functions must have compatible calling conventions 4324 if (!isSameCallConv(lcc, rcc)) 4325 return QualType(); 4326 4327 if (lproto && rproto) { // two C99 style function prototypes 4328 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4329 "C++ shouldn't be here"); 4330 unsigned lproto_nargs = lproto->getNumArgs(); 4331 unsigned rproto_nargs = rproto->getNumArgs(); 4332 4333 // Compatible functions must have the same number of arguments 4334 if (lproto_nargs != rproto_nargs) 4335 return QualType(); 4336 4337 // Variadic and non-variadic functions aren't compatible 4338 if (lproto->isVariadic() != rproto->isVariadic()) 4339 return QualType(); 4340 4341 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4342 return QualType(); 4343 4344 // Check argument compatibility 4345 llvm::SmallVector<QualType, 10> types; 4346 for (unsigned i = 0; i < lproto_nargs; i++) { 4347 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4348 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4349 QualType argtype = mergeTypes(largtype, rargtype, OfBlockPointer); 4350 if (argtype.isNull()) return QualType(); 4351 types.push_back(argtype); 4352 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4353 allLTypes = false; 4354 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4355 allRTypes = false; 4356 } 4357 if (allLTypes) return lhs; 4358 if (allRTypes) return rhs; 4359 return getFunctionType(retType, types.begin(), types.size(), 4360 lproto->isVariadic(), lproto->getTypeQuals(), 4361 false, false, 0, 0, 4362 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4363 } 4364 4365 if (lproto) allRTypes = false; 4366 if (rproto) allLTypes = false; 4367 4368 const FunctionProtoType *proto = lproto ? lproto : rproto; 4369 if (proto) { 4370 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4371 if (proto->isVariadic()) return QualType(); 4372 // Check that the types are compatible with the types that 4373 // would result from default argument promotions (C99 6.7.5.3p15). 4374 // The only types actually affected are promotable integer 4375 // types and floats, which would be passed as a different 4376 // type depending on whether the prototype is visible. 4377 unsigned proto_nargs = proto->getNumArgs(); 4378 for (unsigned i = 0; i < proto_nargs; ++i) { 4379 QualType argTy = proto->getArgType(i); 4380 4381 // Look at the promotion type of enum types, since that is the type used 4382 // to pass enum values. 4383 if (const EnumType *Enum = argTy->getAs<EnumType>()) 4384 argTy = Enum->getDecl()->getPromotionType(); 4385 4386 if (argTy->isPromotableIntegerType() || 4387 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4388 return QualType(); 4389 } 4390 4391 if (allLTypes) return lhs; 4392 if (allRTypes) return rhs; 4393 return getFunctionType(retType, proto->arg_type_begin(), 4394 proto->getNumArgs(), proto->isVariadic(), 4395 proto->getTypeQuals(), 4396 false, false, 0, 0, 4397 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4398 } 4399 4400 if (allLTypes) return lhs; 4401 if (allRTypes) return rhs; 4402 FunctionType::ExtInfo Info(NoReturn, RegParm, lcc); 4403 return getFunctionNoProtoType(retType, Info); 4404} 4405 4406QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 4407 bool OfBlockPointer) { 4408 // C++ [expr]: If an expression initially has the type "reference to T", the 4409 // type is adjusted to "T" prior to any further analysis, the expression 4410 // designates the object or function denoted by the reference, and the 4411 // expression is an lvalue unless the reference is an rvalue reference and 4412 // the expression is a function call (possibly inside parentheses). 4413 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 4414 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 4415 4416 QualType LHSCan = getCanonicalType(LHS), 4417 RHSCan = getCanonicalType(RHS); 4418 4419 // If two types are identical, they are compatible. 4420 if (LHSCan == RHSCan) 4421 return LHS; 4422 4423 // If the qualifiers are different, the types aren't compatible... mostly. 4424 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4425 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4426 if (LQuals != RQuals) { 4427 // If any of these qualifiers are different, we have a type 4428 // mismatch. 4429 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4430 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4431 return QualType(); 4432 4433 // Exactly one GC qualifier difference is allowed: __strong is 4434 // okay if the other type has no GC qualifier but is an Objective 4435 // C object pointer (i.e. implicitly strong by default). We fix 4436 // this by pretending that the unqualified type was actually 4437 // qualified __strong. 4438 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4439 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4440 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4441 4442 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4443 return QualType(); 4444 4445 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4446 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4447 } 4448 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4449 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4450 } 4451 return QualType(); 4452 } 4453 4454 // Okay, qualifiers are equal. 4455 4456 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4457 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4458 4459 // We want to consider the two function types to be the same for these 4460 // comparisons, just force one to the other. 4461 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 4462 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 4463 4464 // Same as above for arrays 4465 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 4466 LHSClass = Type::ConstantArray; 4467 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 4468 RHSClass = Type::ConstantArray; 4469 4470 // Canonicalize ExtVector -> Vector. 4471 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 4472 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 4473 4474 // If the canonical type classes don't match. 4475 if (LHSClass != RHSClass) { 4476 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 4477 // a signed integer type, or an unsigned integer type. 4478 // Compatibility is based on the underlying type, not the promotion 4479 // type. 4480 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 4481 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 4482 return RHS; 4483 } 4484 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 4485 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 4486 return LHS; 4487 } 4488 4489 return QualType(); 4490 } 4491 4492 // The canonical type classes match. 4493 switch (LHSClass) { 4494#define TYPE(Class, Base) 4495#define ABSTRACT_TYPE(Class, Base) 4496#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 4497#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4498#define DEPENDENT_TYPE(Class, Base) case Type::Class: 4499#include "clang/AST/TypeNodes.def" 4500 assert(false && "Non-canonical and dependent types shouldn't get here"); 4501 return QualType(); 4502 4503 case Type::LValueReference: 4504 case Type::RValueReference: 4505 case Type::MemberPointer: 4506 assert(false && "C++ should never be in mergeTypes"); 4507 return QualType(); 4508 4509 case Type::IncompleteArray: 4510 case Type::VariableArray: 4511 case Type::FunctionProto: 4512 case Type::ExtVector: 4513 assert(false && "Types are eliminated above"); 4514 return QualType(); 4515 4516 case Type::Pointer: 4517 { 4518 // Merge two pointer types, while trying to preserve typedef info 4519 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 4520 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 4521 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 4522 if (ResultType.isNull()) return QualType(); 4523 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4524 return LHS; 4525 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4526 return RHS; 4527 return getPointerType(ResultType); 4528 } 4529 case Type::BlockPointer: 4530 { 4531 // Merge two block pointer types, while trying to preserve typedef info 4532 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 4533 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 4534 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer); 4535 if (ResultType.isNull()) return QualType(); 4536 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4537 return LHS; 4538 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4539 return RHS; 4540 return getBlockPointerType(ResultType); 4541 } 4542 case Type::ConstantArray: 4543 { 4544 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 4545 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 4546 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 4547 return QualType(); 4548 4549 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 4550 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 4551 QualType ResultType = mergeTypes(LHSElem, RHSElem); 4552 if (ResultType.isNull()) return QualType(); 4553 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4554 return LHS; 4555 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4556 return RHS; 4557 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 4558 ArrayType::ArraySizeModifier(), 0); 4559 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 4560 ArrayType::ArraySizeModifier(), 0); 4561 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 4562 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 4563 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4564 return LHS; 4565 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4566 return RHS; 4567 if (LVAT) { 4568 // FIXME: This isn't correct! But tricky to implement because 4569 // the array's size has to be the size of LHS, but the type 4570 // has to be different. 4571 return LHS; 4572 } 4573 if (RVAT) { 4574 // FIXME: This isn't correct! But tricky to implement because 4575 // the array's size has to be the size of RHS, but the type 4576 // has to be different. 4577 return RHS; 4578 } 4579 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 4580 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 4581 return getIncompleteArrayType(ResultType, 4582 ArrayType::ArraySizeModifier(), 0); 4583 } 4584 case Type::FunctionNoProto: 4585 return mergeFunctionTypes(LHS, RHS, OfBlockPointer); 4586 case Type::Record: 4587 case Type::Enum: 4588 return QualType(); 4589 case Type::Builtin: 4590 // Only exactly equal builtin types are compatible, which is tested above. 4591 return QualType(); 4592 case Type::Complex: 4593 // Distinct complex types are incompatible. 4594 return QualType(); 4595 case Type::Vector: 4596 // FIXME: The merged type should be an ExtVector! 4597 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 4598 RHSCan->getAs<VectorType>())) 4599 return LHS; 4600 return QualType(); 4601 case Type::ObjCInterface: { 4602 // Check if the interfaces are assignment compatible. 4603 // FIXME: This should be type compatibility, e.g. whether 4604 // "LHS x; RHS x;" at global scope is legal. 4605 const ObjCInterfaceType* LHSIface = LHS->getAs<ObjCInterfaceType>(); 4606 const ObjCInterfaceType* RHSIface = RHS->getAs<ObjCInterfaceType>(); 4607 if (LHSIface && RHSIface && 4608 canAssignObjCInterfaces(LHSIface, RHSIface)) 4609 return LHS; 4610 4611 return QualType(); 4612 } 4613 case Type::ObjCObjectPointer: { 4614 if (OfBlockPointer) { 4615 if (canAssignObjCInterfacesInBlockPointer( 4616 LHS->getAs<ObjCObjectPointerType>(), 4617 RHS->getAs<ObjCObjectPointerType>())) 4618 return LHS; 4619 return QualType(); 4620 } 4621 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 4622 RHS->getAs<ObjCObjectPointerType>())) 4623 return LHS; 4624 4625 return QualType(); 4626 } 4627 } 4628 4629 return QualType(); 4630} 4631 4632//===----------------------------------------------------------------------===// 4633// Integer Predicates 4634//===----------------------------------------------------------------------===// 4635 4636unsigned ASTContext::getIntWidth(QualType T) { 4637 if (T->isBooleanType()) 4638 return 1; 4639 if (EnumType *ET = dyn_cast<EnumType>(T)) 4640 T = ET->getDecl()->getIntegerType(); 4641 // For builtin types, just use the standard type sizing method 4642 return (unsigned)getTypeSize(T); 4643} 4644 4645QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 4646 assert(T->isSignedIntegerType() && "Unexpected type"); 4647 4648 // Turn <4 x signed int> -> <4 x unsigned int> 4649 if (const VectorType *VTy = T->getAs<VectorType>()) 4650 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 4651 VTy->getNumElements(), VTy->isAltiVec(), VTy->isPixel()); 4652 4653 // For enums, we return the unsigned version of the base type. 4654 if (const EnumType *ETy = T->getAs<EnumType>()) 4655 T = ETy->getDecl()->getIntegerType(); 4656 4657 const BuiltinType *BTy = T->getAs<BuiltinType>(); 4658 assert(BTy && "Unexpected signed integer type"); 4659 switch (BTy->getKind()) { 4660 case BuiltinType::Char_S: 4661 case BuiltinType::SChar: 4662 return UnsignedCharTy; 4663 case BuiltinType::Short: 4664 return UnsignedShortTy; 4665 case BuiltinType::Int: 4666 return UnsignedIntTy; 4667 case BuiltinType::Long: 4668 return UnsignedLongTy; 4669 case BuiltinType::LongLong: 4670 return UnsignedLongLongTy; 4671 case BuiltinType::Int128: 4672 return UnsignedInt128Ty; 4673 default: 4674 assert(0 && "Unexpected signed integer type"); 4675 return QualType(); 4676 } 4677} 4678 4679ExternalASTSource::~ExternalASTSource() { } 4680 4681void ExternalASTSource::PrintStats() { } 4682 4683 4684//===----------------------------------------------------------------------===// 4685// Builtin Type Computation 4686//===----------------------------------------------------------------------===// 4687 4688/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 4689/// pointer over the consumed characters. This returns the resultant type. 4690static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 4691 ASTContext::GetBuiltinTypeError &Error, 4692 bool AllowTypeModifiers = true) { 4693 // Modifiers. 4694 int HowLong = 0; 4695 bool Signed = false, Unsigned = false; 4696 4697 // Read the modifiers first. 4698 bool Done = false; 4699 while (!Done) { 4700 switch (*Str++) { 4701 default: Done = true; --Str; break; 4702 case 'S': 4703 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 4704 assert(!Signed && "Can't use 'S' modifier multiple times!"); 4705 Signed = true; 4706 break; 4707 case 'U': 4708 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 4709 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 4710 Unsigned = true; 4711 break; 4712 case 'L': 4713 assert(HowLong <= 2 && "Can't have LLLL modifier"); 4714 ++HowLong; 4715 break; 4716 } 4717 } 4718 4719 QualType Type; 4720 4721 // Read the base type. 4722 switch (*Str++) { 4723 default: assert(0 && "Unknown builtin type letter!"); 4724 case 'v': 4725 assert(HowLong == 0 && !Signed && !Unsigned && 4726 "Bad modifiers used with 'v'!"); 4727 Type = Context.VoidTy; 4728 break; 4729 case 'f': 4730 assert(HowLong == 0 && !Signed && !Unsigned && 4731 "Bad modifiers used with 'f'!"); 4732 Type = Context.FloatTy; 4733 break; 4734 case 'd': 4735 assert(HowLong < 2 && !Signed && !Unsigned && 4736 "Bad modifiers used with 'd'!"); 4737 if (HowLong) 4738 Type = Context.LongDoubleTy; 4739 else 4740 Type = Context.DoubleTy; 4741 break; 4742 case 's': 4743 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 4744 if (Unsigned) 4745 Type = Context.UnsignedShortTy; 4746 else 4747 Type = Context.ShortTy; 4748 break; 4749 case 'i': 4750 if (HowLong == 3) 4751 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 4752 else if (HowLong == 2) 4753 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 4754 else if (HowLong == 1) 4755 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 4756 else 4757 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 4758 break; 4759 case 'c': 4760 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 4761 if (Signed) 4762 Type = Context.SignedCharTy; 4763 else if (Unsigned) 4764 Type = Context.UnsignedCharTy; 4765 else 4766 Type = Context.CharTy; 4767 break; 4768 case 'b': // boolean 4769 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 4770 Type = Context.BoolTy; 4771 break; 4772 case 'z': // size_t. 4773 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 4774 Type = Context.getSizeType(); 4775 break; 4776 case 'F': 4777 Type = Context.getCFConstantStringType(); 4778 break; 4779 case 'a': 4780 Type = Context.getBuiltinVaListType(); 4781 assert(!Type.isNull() && "builtin va list type not initialized!"); 4782 break; 4783 case 'A': 4784 // This is a "reference" to a va_list; however, what exactly 4785 // this means depends on how va_list is defined. There are two 4786 // different kinds of va_list: ones passed by value, and ones 4787 // passed by reference. An example of a by-value va_list is 4788 // x86, where va_list is a char*. An example of by-ref va_list 4789 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 4790 // we want this argument to be a char*&; for x86-64, we want 4791 // it to be a __va_list_tag*. 4792 Type = Context.getBuiltinVaListType(); 4793 assert(!Type.isNull() && "builtin va list type not initialized!"); 4794 if (Type->isArrayType()) { 4795 Type = Context.getArrayDecayedType(Type); 4796 } else { 4797 Type = Context.getLValueReferenceType(Type); 4798 } 4799 break; 4800 case 'V': { 4801 char *End; 4802 unsigned NumElements = strtoul(Str, &End, 10); 4803 assert(End != Str && "Missing vector size"); 4804 4805 Str = End; 4806 4807 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4808 // FIXME: Don't know what to do about AltiVec. 4809 Type = Context.getVectorType(ElementType, NumElements, false, false); 4810 break; 4811 } 4812 case 'X': { 4813 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4814 Type = Context.getComplexType(ElementType); 4815 break; 4816 } 4817 case 'P': 4818 Type = Context.getFILEType(); 4819 if (Type.isNull()) { 4820 Error = ASTContext::GE_Missing_stdio; 4821 return QualType(); 4822 } 4823 break; 4824 case 'J': 4825 if (Signed) 4826 Type = Context.getsigjmp_bufType(); 4827 else 4828 Type = Context.getjmp_bufType(); 4829 4830 if (Type.isNull()) { 4831 Error = ASTContext::GE_Missing_setjmp; 4832 return QualType(); 4833 } 4834 break; 4835 } 4836 4837 if (!AllowTypeModifiers) 4838 return Type; 4839 4840 Done = false; 4841 while (!Done) { 4842 switch (char c = *Str++) { 4843 default: Done = true; --Str; break; 4844 case '*': 4845 case '&': 4846 { 4847 // Both pointers and references can have their pointee types 4848 // qualified with an address space. 4849 char *End; 4850 unsigned AddrSpace = strtoul(Str, &End, 10); 4851 if (End != Str && AddrSpace != 0) { 4852 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 4853 Str = End; 4854 } 4855 } 4856 if (c == '*') 4857 Type = Context.getPointerType(Type); 4858 else 4859 Type = Context.getLValueReferenceType(Type); 4860 break; 4861 // FIXME: There's no way to have a built-in with an rvalue ref arg. 4862 case 'C': 4863 Type = Type.withConst(); 4864 break; 4865 case 'D': 4866 Type = Context.getVolatileType(Type); 4867 break; 4868 } 4869 } 4870 4871 return Type; 4872} 4873 4874/// GetBuiltinType - Return the type for the specified builtin. 4875QualType ASTContext::GetBuiltinType(unsigned id, 4876 GetBuiltinTypeError &Error) { 4877 const char *TypeStr = BuiltinInfo.GetTypeString(id); 4878 4879 llvm::SmallVector<QualType, 8> ArgTypes; 4880 4881 Error = GE_None; 4882 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 4883 if (Error != GE_None) 4884 return QualType(); 4885 while (TypeStr[0] && TypeStr[0] != '.') { 4886 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 4887 if (Error != GE_None) 4888 return QualType(); 4889 4890 // Do array -> pointer decay. The builtin should use the decayed type. 4891 if (Ty->isArrayType()) 4892 Ty = getArrayDecayedType(Ty); 4893 4894 ArgTypes.push_back(Ty); 4895 } 4896 4897 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 4898 "'.' should only occur at end of builtin type list!"); 4899 4900 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 4901 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 4902 return getFunctionNoProtoType(ResType); 4903 4904 // FIXME: Should we create noreturn types? 4905 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 4906 TypeStr[0] == '.', 0, false, false, 0, 0, 4907 FunctionType::ExtInfo()); 4908} 4909 4910QualType 4911ASTContext::UsualArithmeticConversionsType(QualType lhs, QualType rhs) { 4912 // Perform the usual unary conversions. We do this early so that 4913 // integral promotions to "int" can allow us to exit early, in the 4914 // lhs == rhs check. Also, for conversion purposes, we ignore any 4915 // qualifiers. For example, "const float" and "float" are 4916 // equivalent. 4917 if (lhs->isPromotableIntegerType()) 4918 lhs = getPromotedIntegerType(lhs); 4919 else 4920 lhs = lhs.getUnqualifiedType(); 4921 if (rhs->isPromotableIntegerType()) 4922 rhs = getPromotedIntegerType(rhs); 4923 else 4924 rhs = rhs.getUnqualifiedType(); 4925 4926 // If both types are identical, no conversion is needed. 4927 if (lhs == rhs) 4928 return lhs; 4929 4930 // If either side is a non-arithmetic type (e.g. a pointer), we are done. 4931 // The caller can deal with this (e.g. pointer + int). 4932 if (!lhs->isArithmeticType() || !rhs->isArithmeticType()) 4933 return lhs; 4934 4935 // At this point, we have two different arithmetic types. 4936 4937 // Handle complex types first (C99 6.3.1.8p1). 4938 if (lhs->isComplexType() || rhs->isComplexType()) { 4939 // if we have an integer operand, the result is the complex type. 4940 if (rhs->isIntegerType() || rhs->isComplexIntegerType()) { 4941 // convert the rhs to the lhs complex type. 4942 return lhs; 4943 } 4944 if (lhs->isIntegerType() || lhs->isComplexIntegerType()) { 4945 // convert the lhs to the rhs complex type. 4946 return rhs; 4947 } 4948 // This handles complex/complex, complex/float, or float/complex. 4949 // When both operands are complex, the shorter operand is converted to the 4950 // type of the longer, and that is the type of the result. This corresponds 4951 // to what is done when combining two real floating-point operands. 4952 // The fun begins when size promotion occur across type domains. 4953 // From H&S 6.3.4: When one operand is complex and the other is a real 4954 // floating-point type, the less precise type is converted, within it's 4955 // real or complex domain, to the precision of the other type. For example, 4956 // when combining a "long double" with a "double _Complex", the 4957 // "double _Complex" is promoted to "long double _Complex". 4958 int result = getFloatingTypeOrder(lhs, rhs); 4959 4960 if (result > 0) { // The left side is bigger, convert rhs. 4961 rhs = getFloatingTypeOfSizeWithinDomain(lhs, rhs); 4962 } else if (result < 0) { // The right side is bigger, convert lhs. 4963 lhs = getFloatingTypeOfSizeWithinDomain(rhs, lhs); 4964 } 4965 // At this point, lhs and rhs have the same rank/size. Now, make sure the 4966 // domains match. This is a requirement for our implementation, C99 4967 // does not require this promotion. 4968 if (lhs != rhs) { // Domains don't match, we have complex/float mix. 4969 if (lhs->isRealFloatingType()) { // handle "double, _Complex double". 4970 return rhs; 4971 } else { // handle "_Complex double, double". 4972 return lhs; 4973 } 4974 } 4975 return lhs; // The domain/size match exactly. 4976 } 4977 // Now handle "real" floating types (i.e. float, double, long double). 4978 if (lhs->isRealFloatingType() || rhs->isRealFloatingType()) { 4979 // if we have an integer operand, the result is the real floating type. 4980 if (rhs->isIntegerType()) { 4981 // convert rhs to the lhs floating point type. 4982 return lhs; 4983 } 4984 if (rhs->isComplexIntegerType()) { 4985 // convert rhs to the complex floating point type. 4986 return getComplexType(lhs); 4987 } 4988 if (lhs->isIntegerType()) { 4989 // convert lhs to the rhs floating point type. 4990 return rhs; 4991 } 4992 if (lhs->isComplexIntegerType()) { 4993 // convert lhs to the complex floating point type. 4994 return getComplexType(rhs); 4995 } 4996 // We have two real floating types, float/complex combos were handled above. 4997 // Convert the smaller operand to the bigger result. 4998 int result = getFloatingTypeOrder(lhs, rhs); 4999 if (result > 0) // convert the rhs 5000 return lhs; 5001 assert(result < 0 && "illegal float comparison"); 5002 return rhs; // convert the lhs 5003 } 5004 if (lhs->isComplexIntegerType() || rhs->isComplexIntegerType()) { 5005 // Handle GCC complex int extension. 5006 const ComplexType *lhsComplexInt = lhs->getAsComplexIntegerType(); 5007 const ComplexType *rhsComplexInt = rhs->getAsComplexIntegerType(); 5008 5009 if (lhsComplexInt && rhsComplexInt) { 5010 if (getIntegerTypeOrder(lhsComplexInt->getElementType(), 5011 rhsComplexInt->getElementType()) >= 0) 5012 return lhs; // convert the rhs 5013 return rhs; 5014 } else if (lhsComplexInt && rhs->isIntegerType()) { 5015 // convert the rhs to the lhs complex type. 5016 return lhs; 5017 } else if (rhsComplexInt && lhs->isIntegerType()) { 5018 // convert the lhs to the rhs complex type. 5019 return rhs; 5020 } 5021 } 5022 // Finally, we have two differing integer types. 5023 // The rules for this case are in C99 6.3.1.8 5024 int compare = getIntegerTypeOrder(lhs, rhs); 5025 bool lhsSigned = lhs->isSignedIntegerType(), 5026 rhsSigned = rhs->isSignedIntegerType(); 5027 QualType destType; 5028 if (lhsSigned == rhsSigned) { 5029 // Same signedness; use the higher-ranked type 5030 destType = compare >= 0 ? lhs : rhs; 5031 } else if (compare != (lhsSigned ? 1 : -1)) { 5032 // The unsigned type has greater than or equal rank to the 5033 // signed type, so use the unsigned type 5034 destType = lhsSigned ? rhs : lhs; 5035 } else if (getIntWidth(lhs) != getIntWidth(rhs)) { 5036 // The two types are different widths; if we are here, that 5037 // means the signed type is larger than the unsigned type, so 5038 // use the signed type. 5039 destType = lhsSigned ? lhs : rhs; 5040 } else { 5041 // The signed type is higher-ranked than the unsigned type, 5042 // but isn't actually any bigger (like unsigned int and long 5043 // on most 32-bit systems). Use the unsigned type corresponding 5044 // to the signed type. 5045 destType = getCorrespondingUnsignedType(lhsSigned ? lhs : rhs); 5046 } 5047 return destType; 5048} 5049