ASTContext.cpp revision ac9590effa90406767a544005ed1de52e258306b
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 // Deallocate the memory associated with the DeclarationNameTable. 114 DeclarationNames.DoDestroy(*this); 115 116 TUDecl->Destroy(*this); 117} 118 119void 120ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 121 ExternalSource.reset(Source.take()); 122} 123 124void ASTContext::PrintStats() const { 125 fprintf(stderr, "*** AST Context Stats:\n"); 126 fprintf(stderr, " %d types total.\n", (int)Types.size()); 127 128 unsigned counts[] = { 129#define TYPE(Name, Parent) 0, 130#define ABSTRACT_TYPE(Name, Parent) 131#include "clang/AST/TypeNodes.def" 132 0 // Extra 133 }; 134 135 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 136 Type *T = Types[i]; 137 counts[(unsigned)T->getTypeClass()]++; 138 } 139 140 unsigned Idx = 0; 141 unsigned TotalBytes = 0; 142#define TYPE(Name, Parent) \ 143 if (counts[Idx]) \ 144 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 145 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 146 ++Idx; 147#define ABSTRACT_TYPE(Name, Parent) 148#include "clang/AST/TypeNodes.def" 149 150 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 151 152 if (ExternalSource.get()) { 153 fprintf(stderr, "\n"); 154 ExternalSource->PrintStats(); 155 } 156} 157 158 159void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 160 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 161 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 162 Types.push_back(Ty); 163} 164 165void ASTContext::InitBuiltinTypes() { 166 assert(VoidTy.isNull() && "Context reinitialized?"); 167 168 // C99 6.2.5p19. 169 InitBuiltinType(VoidTy, BuiltinType::Void); 170 171 // C99 6.2.5p2. 172 InitBuiltinType(BoolTy, BuiltinType::Bool); 173 // C99 6.2.5p3. 174 if (LangOpts.CharIsSigned) 175 InitBuiltinType(CharTy, BuiltinType::Char_S); 176 else 177 InitBuiltinType(CharTy, BuiltinType::Char_U); 178 // C99 6.2.5p4. 179 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 180 InitBuiltinType(ShortTy, BuiltinType::Short); 181 InitBuiltinType(IntTy, BuiltinType::Int); 182 InitBuiltinType(LongTy, BuiltinType::Long); 183 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 184 185 // C99 6.2.5p6. 186 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 187 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 188 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 189 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 190 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 191 192 // C99 6.2.5p10. 193 InitBuiltinType(FloatTy, BuiltinType::Float); 194 InitBuiltinType(DoubleTy, BuiltinType::Double); 195 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 196 197 // GNU extension, 128-bit integers. 198 InitBuiltinType(Int128Ty, BuiltinType::Int128); 199 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 200 201 if (LangOpts.CPlusPlus) // C++ 3.9.1p5 202 InitBuiltinType(WCharTy, BuiltinType::WChar); 203 else // C99 204 WCharTy = getFromTargetType(Target.getWCharType()); 205 206 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 207 InitBuiltinType(Char16Ty, BuiltinType::Char16); 208 else // C99 209 Char16Ty = getFromTargetType(Target.getChar16Type()); 210 211 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 212 InitBuiltinType(Char32Ty, BuiltinType::Char32); 213 else // C99 214 Char32Ty = getFromTargetType(Target.getChar32Type()); 215 216 // Placeholder type for functions. 217 InitBuiltinType(OverloadTy, BuiltinType::Overload); 218 219 // Placeholder type for type-dependent expressions whose type is 220 // completely unknown. No code should ever check a type against 221 // DependentTy and users should never see it; however, it is here to 222 // help diagnose failures to properly check for type-dependent 223 // expressions. 224 InitBuiltinType(DependentTy, BuiltinType::Dependent); 225 226 // Placeholder type for C++0x auto declarations whose real type has 227 // not yet been deduced. 228 InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 229 230 // C99 6.2.5p11. 231 FloatComplexTy = getComplexType(FloatTy); 232 DoubleComplexTy = getComplexType(DoubleTy); 233 LongDoubleComplexTy = getComplexType(LongDoubleTy); 234 235 BuiltinVaListType = QualType(); 236 237 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 238 ObjCIdTypedefType = QualType(); 239 ObjCClassTypedefType = QualType(); 240 ObjCSelTypedefType = QualType(); 241 242 // Builtin types for 'id', 'Class', and 'SEL'. 243 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 244 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 245 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 246 247 ObjCConstantStringType = QualType(); 248 249 // void * type 250 VoidPtrTy = getPointerType(VoidTy); 251 252 // nullptr type (C++0x 2.14.7) 253 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 254} 255 256MemberSpecializationInfo * 257ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 258 assert(Var->isStaticDataMember() && "Not a static data member"); 259 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 260 = InstantiatedFromStaticDataMember.find(Var); 261 if (Pos == InstantiatedFromStaticDataMember.end()) 262 return 0; 263 264 return Pos->second; 265} 266 267void 268ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 269 TemplateSpecializationKind TSK) { 270 assert(Inst->isStaticDataMember() && "Not a static data member"); 271 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 272 assert(!InstantiatedFromStaticDataMember[Inst] && 273 "Already noted what static data member was instantiated from"); 274 InstantiatedFromStaticDataMember[Inst] 275 = new (*this) MemberSpecializationInfo(Tmpl, TSK); 276} 277 278NamedDecl * 279ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 280 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 281 = InstantiatedFromUsingDecl.find(UUD); 282 if (Pos == InstantiatedFromUsingDecl.end()) 283 return 0; 284 285 return Pos->second; 286} 287 288void 289ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 290 assert((isa<UsingDecl>(Pattern) || 291 isa<UnresolvedUsingValueDecl>(Pattern) || 292 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 293 "pattern decl is not a using decl"); 294 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 295 InstantiatedFromUsingDecl[Inst] = Pattern; 296} 297 298UsingShadowDecl * 299ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 300 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 301 = InstantiatedFromUsingShadowDecl.find(Inst); 302 if (Pos == InstantiatedFromUsingShadowDecl.end()) 303 return 0; 304 305 return Pos->second; 306} 307 308void 309ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 310 UsingShadowDecl *Pattern) { 311 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 312 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 313} 314 315FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 316 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 317 = InstantiatedFromUnnamedFieldDecl.find(Field); 318 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 319 return 0; 320 321 return Pos->second; 322} 323 324void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 325 FieldDecl *Tmpl) { 326 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 327 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 328 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 329 "Already noted what unnamed field was instantiated from"); 330 331 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 332} 333 334ASTContext::overridden_cxx_method_iterator 335ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 336 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 337 = OverriddenMethods.find(Method); 338 if (Pos == OverriddenMethods.end()) 339 return 0; 340 341 return Pos->second.begin(); 342} 343 344ASTContext::overridden_cxx_method_iterator 345ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 346 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 347 = OverriddenMethods.find(Method); 348 if (Pos == OverriddenMethods.end()) 349 return 0; 350 351 return Pos->second.end(); 352} 353 354void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 355 const CXXMethodDecl *Overridden) { 356 OverriddenMethods[Method].push_back(Overridden); 357} 358 359namespace { 360 class BeforeInTranslationUnit 361 : std::binary_function<SourceRange, SourceRange, bool> { 362 SourceManager *SourceMgr; 363 364 public: 365 explicit BeforeInTranslationUnit(SourceManager *SM) : SourceMgr(SM) { } 366 367 bool operator()(SourceRange X, SourceRange Y) { 368 return SourceMgr->isBeforeInTranslationUnit(X.getBegin(), Y.getBegin()); 369 } 370 }; 371} 372 373//===----------------------------------------------------------------------===// 374// Type Sizing and Analysis 375//===----------------------------------------------------------------------===// 376 377/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 378/// scalar floating point type. 379const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 380 const BuiltinType *BT = T->getAs<BuiltinType>(); 381 assert(BT && "Not a floating point type!"); 382 switch (BT->getKind()) { 383 default: assert(0 && "Not a floating point type!"); 384 case BuiltinType::Float: return Target.getFloatFormat(); 385 case BuiltinType::Double: return Target.getDoubleFormat(); 386 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 387 } 388} 389 390/// getDeclAlign - Return a conservative estimate of the alignment of the 391/// specified decl. Note that bitfields do not have a valid alignment, so 392/// this method will assert on them. 393/// If @p RefAsPointee, references are treated like their underlying type 394/// (for alignof), else they're treated like pointers (for CodeGen). 395CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) { 396 unsigned Align = Target.getCharWidth(); 397 398 if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 399 Align = std::max(Align, AA->getMaxAlignment()); 400 401 if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 402 QualType T = VD->getType(); 403 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 404 if (RefAsPointee) 405 T = RT->getPointeeType(); 406 else 407 T = getPointerType(RT->getPointeeType()); 408 } 409 if (!T->isIncompleteType() && !T->isFunctionType()) { 410 // Incomplete or function types default to 1. 411 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 412 T = cast<ArrayType>(T)->getElementType(); 413 414 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 415 } 416 if (const FieldDecl *FD = dyn_cast<FieldDecl>(VD)) { 417 // In the case of a field in a packed struct, we want the minimum 418 // of the alignment of the field and the alignment of the struct. 419 Align = std::min(Align, 420 getPreferredTypeAlign(FD->getParent()->getTypeForDecl())); 421 } 422 } 423 424 return CharUnits::fromQuantity(Align / Target.getCharWidth()); 425} 426 427/// getTypeSize - Return the size of the specified type, in bits. This method 428/// does not work on incomplete types. 429/// 430/// FIXME: Pointers into different addr spaces could have different sizes and 431/// alignment requirements: getPointerInfo should take an AddrSpace, this 432/// should take a QualType, &c. 433std::pair<uint64_t, unsigned> 434ASTContext::getTypeInfo(const Type *T) { 435 uint64_t Width=0; 436 unsigned Align=8; 437 switch (T->getTypeClass()) { 438#define TYPE(Class, Base) 439#define ABSTRACT_TYPE(Class, Base) 440#define NON_CANONICAL_TYPE(Class, Base) 441#define DEPENDENT_TYPE(Class, Base) case Type::Class: 442#include "clang/AST/TypeNodes.def" 443 assert(false && "Should not see dependent types"); 444 break; 445 446 case Type::FunctionNoProto: 447 case Type::FunctionProto: 448 // GCC extension: alignof(function) = 32 bits 449 Width = 0; 450 Align = 32; 451 break; 452 453 case Type::IncompleteArray: 454 case Type::VariableArray: 455 Width = 0; 456 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 457 break; 458 459 case Type::ConstantArray: { 460 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 461 462 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 463 Width = EltInfo.first*CAT->getSize().getZExtValue(); 464 Align = EltInfo.second; 465 break; 466 } 467 case Type::ExtVector: 468 case Type::Vector: { 469 const VectorType *VT = cast<VectorType>(T); 470 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 471 Width = EltInfo.first*VT->getNumElements(); 472 Align = Width; 473 // If the alignment is not a power of 2, round up to the next power of 2. 474 // This happens for non-power-of-2 length vectors. 475 if (Align & (Align-1)) { 476 Align = llvm::NextPowerOf2(Align); 477 Width = llvm::RoundUpToAlignment(Width, Align); 478 } 479 break; 480 } 481 482 case Type::Builtin: 483 switch (cast<BuiltinType>(T)->getKind()) { 484 default: assert(0 && "Unknown builtin type!"); 485 case BuiltinType::Void: 486 // GCC extension: alignof(void) = 8 bits. 487 Width = 0; 488 Align = 8; 489 break; 490 491 case BuiltinType::Bool: 492 Width = Target.getBoolWidth(); 493 Align = Target.getBoolAlign(); 494 break; 495 case BuiltinType::Char_S: 496 case BuiltinType::Char_U: 497 case BuiltinType::UChar: 498 case BuiltinType::SChar: 499 Width = Target.getCharWidth(); 500 Align = Target.getCharAlign(); 501 break; 502 case BuiltinType::WChar: 503 Width = Target.getWCharWidth(); 504 Align = Target.getWCharAlign(); 505 break; 506 case BuiltinType::Char16: 507 Width = Target.getChar16Width(); 508 Align = Target.getChar16Align(); 509 break; 510 case BuiltinType::Char32: 511 Width = Target.getChar32Width(); 512 Align = Target.getChar32Align(); 513 break; 514 case BuiltinType::UShort: 515 case BuiltinType::Short: 516 Width = Target.getShortWidth(); 517 Align = Target.getShortAlign(); 518 break; 519 case BuiltinType::UInt: 520 case BuiltinType::Int: 521 Width = Target.getIntWidth(); 522 Align = Target.getIntAlign(); 523 break; 524 case BuiltinType::ULong: 525 case BuiltinType::Long: 526 Width = Target.getLongWidth(); 527 Align = Target.getLongAlign(); 528 break; 529 case BuiltinType::ULongLong: 530 case BuiltinType::LongLong: 531 Width = Target.getLongLongWidth(); 532 Align = Target.getLongLongAlign(); 533 break; 534 case BuiltinType::Int128: 535 case BuiltinType::UInt128: 536 Width = 128; 537 Align = 128; // int128_t is 128-bit aligned on all targets. 538 break; 539 case BuiltinType::Float: 540 Width = Target.getFloatWidth(); 541 Align = Target.getFloatAlign(); 542 break; 543 case BuiltinType::Double: 544 Width = Target.getDoubleWidth(); 545 Align = Target.getDoubleAlign(); 546 break; 547 case BuiltinType::LongDouble: 548 Width = Target.getLongDoubleWidth(); 549 Align = Target.getLongDoubleAlign(); 550 break; 551 case BuiltinType::NullPtr: 552 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 553 Align = Target.getPointerAlign(0); // == sizeof(void*) 554 break; 555 } 556 break; 557 case Type::ObjCObjectPointer: 558 Width = Target.getPointerWidth(0); 559 Align = Target.getPointerAlign(0); 560 break; 561 case Type::BlockPointer: { 562 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 563 Width = Target.getPointerWidth(AS); 564 Align = Target.getPointerAlign(AS); 565 break; 566 } 567 case Type::LValueReference: 568 case Type::RValueReference: { 569 // alignof and sizeof should never enter this code path here, so we go 570 // the pointer route. 571 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 572 Width = Target.getPointerWidth(AS); 573 Align = Target.getPointerAlign(AS); 574 break; 575 } 576 case Type::Pointer: { 577 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 578 Width = Target.getPointerWidth(AS); 579 Align = Target.getPointerAlign(AS); 580 break; 581 } 582 case Type::MemberPointer: { 583 QualType Pointee = cast<MemberPointerType>(T)->getPointeeType(); 584 std::pair<uint64_t, unsigned> PtrDiffInfo = 585 getTypeInfo(getPointerDiffType()); 586 Width = PtrDiffInfo.first; 587 if (Pointee->isFunctionType()) 588 Width *= 2; 589 Align = PtrDiffInfo.second; 590 break; 591 } 592 case Type::Complex: { 593 // Complex types have the same alignment as their elements, but twice the 594 // size. 595 std::pair<uint64_t, unsigned> EltInfo = 596 getTypeInfo(cast<ComplexType>(T)->getElementType()); 597 Width = EltInfo.first*2; 598 Align = EltInfo.second; 599 break; 600 } 601 case Type::ObjCInterface: { 602 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 603 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 604 Width = Layout.getSize(); 605 Align = Layout.getAlignment(); 606 break; 607 } 608 case Type::Record: 609 case Type::Enum: { 610 const TagType *TT = cast<TagType>(T); 611 612 if (TT->getDecl()->isInvalidDecl()) { 613 Width = 1; 614 Align = 1; 615 break; 616 } 617 618 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 619 return getTypeInfo(ET->getDecl()->getIntegerType()); 620 621 const RecordType *RT = cast<RecordType>(TT); 622 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 623 Width = Layout.getSize(); 624 Align = Layout.getAlignment(); 625 break; 626 } 627 628 case Type::SubstTemplateTypeParm: 629 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 630 getReplacementType().getTypePtr()); 631 632 case Type::Elaborated: 633 return getTypeInfo(cast<ElaboratedType>(T)->getUnderlyingType() 634 .getTypePtr()); 635 636 case Type::Typedef: { 637 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 638 if (const AlignedAttr *Aligned = Typedef->getAttr<AlignedAttr>()) { 639 Align = std::max(Aligned->getMaxAlignment(), 640 getTypeAlign(Typedef->getUnderlyingType().getTypePtr())); 641 Width = getTypeSize(Typedef->getUnderlyingType().getTypePtr()); 642 } else 643 return getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 644 break; 645 } 646 647 case Type::TypeOfExpr: 648 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 649 .getTypePtr()); 650 651 case Type::TypeOf: 652 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 653 654 case Type::Decltype: 655 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 656 .getTypePtr()); 657 658 case Type::QualifiedName: 659 return getTypeInfo(cast<QualifiedNameType>(T)->getNamedType().getTypePtr()); 660 661 case Type::TemplateSpecialization: 662 assert(getCanonicalType(T) != T && 663 "Cannot request the size of a dependent type"); 664 // FIXME: this is likely to be wrong once we support template 665 // aliases, since a template alias could refer to a typedef that 666 // has an __aligned__ attribute on it. 667 return getTypeInfo(getCanonicalType(T)); 668 } 669 670 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 671 return std::make_pair(Width, Align); 672} 673 674/// getTypeSizeInChars - Return the size of the specified type, in characters. 675/// This method does not work on incomplete types. 676CharUnits ASTContext::getTypeSizeInChars(QualType T) { 677 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 678} 679CharUnits ASTContext::getTypeSizeInChars(const Type *T) { 680 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 681} 682 683/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 684/// characters. This method does not work on incomplete types. 685CharUnits ASTContext::getTypeAlignInChars(QualType T) { 686 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 687} 688CharUnits ASTContext::getTypeAlignInChars(const Type *T) { 689 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 690} 691 692/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 693/// type for the current target in bits. This can be different than the ABI 694/// alignment in cases where it is beneficial for performance to overalign 695/// a data type. 696unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 697 unsigned ABIAlign = getTypeAlign(T); 698 699 // Double and long long should be naturally aligned if possible. 700 if (const ComplexType* CT = T->getAs<ComplexType>()) 701 T = CT->getElementType().getTypePtr(); 702 if (T->isSpecificBuiltinType(BuiltinType::Double) || 703 T->isSpecificBuiltinType(BuiltinType::LongLong)) 704 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 705 706 return ABIAlign; 707} 708 709static void CollectLocalObjCIvars(ASTContext *Ctx, 710 const ObjCInterfaceDecl *OI, 711 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 712 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 713 E = OI->ivar_end(); I != E; ++I) { 714 ObjCIvarDecl *IVDecl = *I; 715 if (!IVDecl->isInvalidDecl()) 716 Fields.push_back(cast<FieldDecl>(IVDecl)); 717 } 718} 719 720void ASTContext::CollectObjCIvars(const ObjCInterfaceDecl *OI, 721 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 722 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 723 CollectObjCIvars(SuperClass, Fields); 724 CollectLocalObjCIvars(this, OI, Fields); 725} 726 727/// ShallowCollectObjCIvars - 728/// Collect all ivars, including those synthesized, in the current class. 729/// 730void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 731 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 732 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 733 E = OI->ivar_end(); I != E; ++I) { 734 Ivars.push_back(*I); 735 } 736 737 CollectNonClassIvars(OI, Ivars); 738} 739 740/// CollectNonClassIvars - 741/// This routine collects all other ivars which are not declared in the class. 742/// This includes synthesized ivars (via @synthesize) and those in 743// class's @implementation. 744/// 745void ASTContext::CollectNonClassIvars(const ObjCInterfaceDecl *OI, 746 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 747 // Find ivars declared in class extension. 748 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) { 749 for (ObjCCategoryDecl::ivar_iterator I = CDecl->ivar_begin(), 750 E = CDecl->ivar_end(); I != E; ++I) { 751 Ivars.push_back(*I); 752 } 753 } 754 755 // Also add any ivar defined in this class's implementation. This 756 // includes synthesized ivars. 757 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) { 758 for (ObjCImplementationDecl::ivar_iterator I = ImplDecl->ivar_begin(), 759 E = ImplDecl->ivar_end(); I != E; ++I) 760 Ivars.push_back(*I); 761 } 762} 763 764/// CollectInheritedProtocols - Collect all protocols in current class and 765/// those inherited by it. 766void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 767 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 768 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 769 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 770 PE = OI->protocol_end(); P != PE; ++P) { 771 ObjCProtocolDecl *Proto = (*P); 772 Protocols.insert(Proto); 773 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 774 PE = Proto->protocol_end(); P != PE; ++P) { 775 Protocols.insert(*P); 776 CollectInheritedProtocols(*P, Protocols); 777 } 778 } 779 780 // Categories of this Interface. 781 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 782 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 783 CollectInheritedProtocols(CDeclChain, Protocols); 784 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 785 while (SD) { 786 CollectInheritedProtocols(SD, Protocols); 787 SD = SD->getSuperClass(); 788 } 789 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 790 for (ObjCInterfaceDecl::protocol_iterator P = OC->protocol_begin(), 791 PE = OC->protocol_end(); P != PE; ++P) { 792 ObjCProtocolDecl *Proto = (*P); 793 Protocols.insert(Proto); 794 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 795 PE = Proto->protocol_end(); P != PE; ++P) 796 CollectInheritedProtocols(*P, Protocols); 797 } 798 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 799 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 800 PE = OP->protocol_end(); P != PE; ++P) { 801 ObjCProtocolDecl *Proto = (*P); 802 Protocols.insert(Proto); 803 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 804 PE = Proto->protocol_end(); P != PE; ++P) 805 CollectInheritedProtocols(*P, Protocols); 806 } 807 } 808} 809 810unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) { 811 unsigned count = 0; 812 // Count ivars declared in class extension. 813 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) 814 count += CDecl->ivar_size(); 815 816 // Count ivar defined in this class's implementation. This 817 // includes synthesized ivars. 818 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 819 count += ImplDecl->ivar_size(); 820 821 return count; 822} 823 824/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 825ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 826 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 827 I = ObjCImpls.find(D); 828 if (I != ObjCImpls.end()) 829 return cast<ObjCImplementationDecl>(I->second); 830 return 0; 831} 832/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 833ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 834 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 835 I = ObjCImpls.find(D); 836 if (I != ObjCImpls.end()) 837 return cast<ObjCCategoryImplDecl>(I->second); 838 return 0; 839} 840 841/// \brief Set the implementation of ObjCInterfaceDecl. 842void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 843 ObjCImplementationDecl *ImplD) { 844 assert(IFaceD && ImplD && "Passed null params"); 845 ObjCImpls[IFaceD] = ImplD; 846} 847/// \brief Set the implementation of ObjCCategoryDecl. 848void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 849 ObjCCategoryImplDecl *ImplD) { 850 assert(CatD && ImplD && "Passed null params"); 851 ObjCImpls[CatD] = ImplD; 852} 853 854/// \brief Allocate an uninitialized TypeSourceInfo. 855/// 856/// The caller should initialize the memory held by TypeSourceInfo using 857/// the TypeLoc wrappers. 858/// 859/// \param T the type that will be the basis for type source info. This type 860/// should refer to how the declarator was written in source code, not to 861/// what type semantic analysis resolved the declarator to. 862TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 863 unsigned DataSize) { 864 if (!DataSize) 865 DataSize = TypeLoc::getFullDataSizeForType(T); 866 else 867 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 868 "incorrect data size provided to CreateTypeSourceInfo!"); 869 870 TypeSourceInfo *TInfo = 871 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 872 new (TInfo) TypeSourceInfo(T); 873 return TInfo; 874} 875 876TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 877 SourceLocation L) { 878 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 879 DI->getTypeLoc().initialize(L); 880 return DI; 881} 882 883/// getInterfaceLayoutImpl - Get or compute information about the 884/// layout of the given interface. 885/// 886/// \param Impl - If given, also include the layout of the interface's 887/// implementation. This may differ by including synthesized ivars. 888const ASTRecordLayout & 889ASTContext::getObjCLayout(const ObjCInterfaceDecl *D, 890 const ObjCImplementationDecl *Impl) { 891 assert(!D->isForwardDecl() && "Invalid interface decl!"); 892 893 // Look up this layout, if already laid out, return what we have. 894 ObjCContainerDecl *Key = 895 Impl ? (ObjCContainerDecl*) Impl : (ObjCContainerDecl*) D; 896 if (const ASTRecordLayout *Entry = ObjCLayouts[Key]) 897 return *Entry; 898 899 // Add in synthesized ivar count if laying out an implementation. 900 if (Impl) { 901 unsigned SynthCount = CountNonClassIvars(D); 902 // If there aren't any sythesized ivars then reuse the interface 903 // entry. Note we can't cache this because we simply free all 904 // entries later; however we shouldn't look up implementations 905 // frequently. 906 if (SynthCount == 0) 907 return getObjCLayout(D, 0); 908 } 909 910 const ASTRecordLayout *NewEntry = 911 ASTRecordLayoutBuilder::ComputeLayout(*this, D, Impl); 912 ObjCLayouts[Key] = NewEntry; 913 914 return *NewEntry; 915} 916 917const ASTRecordLayout & 918ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 919 return getObjCLayout(D, 0); 920} 921 922const ASTRecordLayout & 923ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 924 return getObjCLayout(D->getClassInterface(), D); 925} 926 927/// getASTRecordLayout - Get or compute information about the layout of the 928/// specified record (struct/union/class), which indicates its size and field 929/// position information. 930const ASTRecordLayout &ASTContext::getASTRecordLayout(const RecordDecl *D) { 931 D = D->getDefinition(); 932 assert(D && "Cannot get layout of forward declarations!"); 933 934 // Look up this layout, if already laid out, return what we have. 935 // Note that we can't save a reference to the entry because this function 936 // is recursive. 937 const ASTRecordLayout *Entry = ASTRecordLayouts[D]; 938 if (Entry) return *Entry; 939 940 const ASTRecordLayout *NewEntry = 941 ASTRecordLayoutBuilder::ComputeLayout(*this, D); 942 ASTRecordLayouts[D] = NewEntry; 943 944 if (getLangOptions().DumpRecordLayouts) { 945 llvm::errs() << "\n*** Dumping AST Record Layout\n"; 946 DumpRecordLayout(D, llvm::errs()); 947 } 948 949 return *NewEntry; 950} 951 952const CXXMethodDecl *ASTContext::getKeyFunction(const CXXRecordDecl *RD) { 953 RD = cast<CXXRecordDecl>(RD->getDefinition()); 954 assert(RD && "Cannot get key function for forward declarations!"); 955 956 const CXXMethodDecl *&Entry = KeyFunctions[RD]; 957 if (!Entry) 958 Entry = ASTRecordLayoutBuilder::ComputeKeyFunction(RD); 959 else 960 assert(Entry == ASTRecordLayoutBuilder::ComputeKeyFunction(RD) && 961 "Key function changed!"); 962 963 return Entry; 964} 965 966//===----------------------------------------------------------------------===// 967// Type creation/memoization methods 968//===----------------------------------------------------------------------===// 969 970QualType ASTContext::getExtQualType(const Type *TypeNode, Qualifiers Quals) { 971 unsigned Fast = Quals.getFastQualifiers(); 972 Quals.removeFastQualifiers(); 973 974 // Check if we've already instantiated this type. 975 llvm::FoldingSetNodeID ID; 976 ExtQuals::Profile(ID, TypeNode, Quals); 977 void *InsertPos = 0; 978 if (ExtQuals *EQ = ExtQualNodes.FindNodeOrInsertPos(ID, InsertPos)) { 979 assert(EQ->getQualifiers() == Quals); 980 QualType T = QualType(EQ, Fast); 981 return T; 982 } 983 984 ExtQuals *New = new (*this, TypeAlignment) ExtQuals(*this, TypeNode, Quals); 985 ExtQualNodes.InsertNode(New, InsertPos); 986 QualType T = QualType(New, Fast); 987 return T; 988} 989 990QualType ASTContext::getVolatileType(QualType T) { 991 QualType CanT = getCanonicalType(T); 992 if (CanT.isVolatileQualified()) return T; 993 994 QualifierCollector Quals; 995 const Type *TypeNode = Quals.strip(T); 996 Quals.addVolatile(); 997 998 return getExtQualType(TypeNode, Quals); 999} 1000 1001QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 1002 QualType CanT = getCanonicalType(T); 1003 if (CanT.getAddressSpace() == AddressSpace) 1004 return T; 1005 1006 // If we are composing extended qualifiers together, merge together 1007 // into one ExtQuals node. 1008 QualifierCollector Quals; 1009 const Type *TypeNode = Quals.strip(T); 1010 1011 // If this type already has an address space specified, it cannot get 1012 // another one. 1013 assert(!Quals.hasAddressSpace() && 1014 "Type cannot be in multiple addr spaces!"); 1015 Quals.addAddressSpace(AddressSpace); 1016 1017 return getExtQualType(TypeNode, Quals); 1018} 1019 1020QualType ASTContext::getObjCGCQualType(QualType T, 1021 Qualifiers::GC GCAttr) { 1022 QualType CanT = getCanonicalType(T); 1023 if (CanT.getObjCGCAttr() == GCAttr) 1024 return T; 1025 1026 if (T->isPointerType()) { 1027 QualType Pointee = T->getAs<PointerType>()->getPointeeType(); 1028 if (Pointee->isAnyPointerType()) { 1029 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1030 return getPointerType(ResultType); 1031 } 1032 } 1033 1034 // If we are composing extended qualifiers together, merge together 1035 // into one ExtQuals node. 1036 QualifierCollector Quals; 1037 const Type *TypeNode = Quals.strip(T); 1038 1039 // If this type already has an ObjCGC specified, it cannot get 1040 // another one. 1041 assert(!Quals.hasObjCGCAttr() && 1042 "Type cannot have multiple ObjCGCs!"); 1043 Quals.addObjCGCAttr(GCAttr); 1044 1045 return getExtQualType(TypeNode, Quals); 1046} 1047 1048static QualType getExtFunctionType(ASTContext& Context, QualType T, 1049 const FunctionType::ExtInfo &Info) { 1050 QualType ResultType; 1051 if (const PointerType *Pointer = T->getAs<PointerType>()) { 1052 QualType Pointee = Pointer->getPointeeType(); 1053 ResultType = getExtFunctionType(Context, Pointee, Info); 1054 if (ResultType == Pointee) 1055 return T; 1056 1057 ResultType = Context.getPointerType(ResultType); 1058 } else if (const BlockPointerType *BlockPointer 1059 = T->getAs<BlockPointerType>()) { 1060 QualType Pointee = BlockPointer->getPointeeType(); 1061 ResultType = getExtFunctionType(Context, Pointee, Info); 1062 if (ResultType == Pointee) 1063 return T; 1064 1065 ResultType = Context.getBlockPointerType(ResultType); 1066 } else if (const FunctionType *F = T->getAs<FunctionType>()) { 1067 if (F->getExtInfo() == Info) 1068 return T; 1069 1070 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(F)) { 1071 ResultType = Context.getFunctionNoProtoType(FNPT->getResultType(), 1072 Info); 1073 } else { 1074 const FunctionProtoType *FPT = cast<FunctionProtoType>(F); 1075 ResultType 1076 = Context.getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1077 FPT->getNumArgs(), FPT->isVariadic(), 1078 FPT->getTypeQuals(), 1079 FPT->hasExceptionSpec(), 1080 FPT->hasAnyExceptionSpec(), 1081 FPT->getNumExceptions(), 1082 FPT->exception_begin(), 1083 Info); 1084 } 1085 } else 1086 return T; 1087 1088 return Context.getQualifiedType(ResultType, T.getLocalQualifiers()); 1089} 1090 1091QualType ASTContext::getNoReturnType(QualType T, bool AddNoReturn) { 1092 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1093 return getExtFunctionType(*this, T, 1094 Info.withNoReturn(AddNoReturn)); 1095} 1096 1097QualType ASTContext::getCallConvType(QualType T, CallingConv CallConv) { 1098 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1099 return getExtFunctionType(*this, T, 1100 Info.withCallingConv(CallConv)); 1101} 1102 1103QualType ASTContext::getRegParmType(QualType T, unsigned RegParm) { 1104 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1105 return getExtFunctionType(*this, T, 1106 Info.withRegParm(RegParm)); 1107} 1108 1109/// getComplexType - Return the uniqued reference to the type for a complex 1110/// number with the specified element type. 1111QualType ASTContext::getComplexType(QualType T) { 1112 // Unique pointers, to guarantee there is only one pointer of a particular 1113 // structure. 1114 llvm::FoldingSetNodeID ID; 1115 ComplexType::Profile(ID, T); 1116 1117 void *InsertPos = 0; 1118 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1119 return QualType(CT, 0); 1120 1121 // If the pointee type isn't canonical, this won't be a canonical type either, 1122 // so fill in the canonical type field. 1123 QualType Canonical; 1124 if (!T.isCanonical()) { 1125 Canonical = getComplexType(getCanonicalType(T)); 1126 1127 // Get the new insert position for the node we care about. 1128 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1129 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1130 } 1131 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1132 Types.push_back(New); 1133 ComplexTypes.InsertNode(New, InsertPos); 1134 return QualType(New, 0); 1135} 1136 1137/// getPointerType - Return the uniqued reference to the type for a pointer to 1138/// the specified type. 1139QualType ASTContext::getPointerType(QualType T) { 1140 // Unique pointers, to guarantee there is only one pointer of a particular 1141 // structure. 1142 llvm::FoldingSetNodeID ID; 1143 PointerType::Profile(ID, T); 1144 1145 void *InsertPos = 0; 1146 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1147 return QualType(PT, 0); 1148 1149 // If the pointee type isn't canonical, this won't be a canonical type either, 1150 // so fill in the canonical type field. 1151 QualType Canonical; 1152 if (!T.isCanonical()) { 1153 Canonical = getPointerType(getCanonicalType(T)); 1154 1155 // Get the new insert position for the node we care about. 1156 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1157 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1158 } 1159 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1160 Types.push_back(New); 1161 PointerTypes.InsertNode(New, InsertPos); 1162 return QualType(New, 0); 1163} 1164 1165/// getBlockPointerType - Return the uniqued reference to the type for 1166/// a pointer to the specified block. 1167QualType ASTContext::getBlockPointerType(QualType T) { 1168 assert(T->isFunctionType() && "block of function types only"); 1169 // Unique pointers, to guarantee there is only one block of a particular 1170 // structure. 1171 llvm::FoldingSetNodeID ID; 1172 BlockPointerType::Profile(ID, T); 1173 1174 void *InsertPos = 0; 1175 if (BlockPointerType *PT = 1176 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1177 return QualType(PT, 0); 1178 1179 // If the block pointee type isn't canonical, this won't be a canonical 1180 // type either so fill in the canonical type field. 1181 QualType Canonical; 1182 if (!T.isCanonical()) { 1183 Canonical = getBlockPointerType(getCanonicalType(T)); 1184 1185 // Get the new insert position for the node we care about. 1186 BlockPointerType *NewIP = 1187 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1188 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1189 } 1190 BlockPointerType *New 1191 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1192 Types.push_back(New); 1193 BlockPointerTypes.InsertNode(New, InsertPos); 1194 return QualType(New, 0); 1195} 1196 1197/// getLValueReferenceType - Return the uniqued reference to the type for an 1198/// lvalue reference to the specified type. 1199QualType ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) { 1200 // Unique pointers, to guarantee there is only one pointer of a particular 1201 // structure. 1202 llvm::FoldingSetNodeID ID; 1203 ReferenceType::Profile(ID, T, SpelledAsLValue); 1204 1205 void *InsertPos = 0; 1206 if (LValueReferenceType *RT = 1207 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1208 return QualType(RT, 0); 1209 1210 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1211 1212 // If the referencee type isn't canonical, this won't be a canonical type 1213 // either, so fill in the canonical type field. 1214 QualType Canonical; 1215 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1216 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1217 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1218 1219 // Get the new insert position for the node we care about. 1220 LValueReferenceType *NewIP = 1221 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1222 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1223 } 1224 1225 LValueReferenceType *New 1226 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1227 SpelledAsLValue); 1228 Types.push_back(New); 1229 LValueReferenceTypes.InsertNode(New, InsertPos); 1230 1231 return QualType(New, 0); 1232} 1233 1234/// getRValueReferenceType - Return the uniqued reference to the type for an 1235/// rvalue reference to the specified type. 1236QualType ASTContext::getRValueReferenceType(QualType T) { 1237 // Unique pointers, to guarantee there is only one pointer of a particular 1238 // structure. 1239 llvm::FoldingSetNodeID ID; 1240 ReferenceType::Profile(ID, T, false); 1241 1242 void *InsertPos = 0; 1243 if (RValueReferenceType *RT = 1244 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1245 return QualType(RT, 0); 1246 1247 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1248 1249 // If the referencee type isn't canonical, this won't be a canonical type 1250 // either, so fill in the canonical type field. 1251 QualType Canonical; 1252 if (InnerRef || !T.isCanonical()) { 1253 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1254 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1255 1256 // Get the new insert position for the node we care about. 1257 RValueReferenceType *NewIP = 1258 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1259 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1260 } 1261 1262 RValueReferenceType *New 1263 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1264 Types.push_back(New); 1265 RValueReferenceTypes.InsertNode(New, InsertPos); 1266 return QualType(New, 0); 1267} 1268 1269/// getMemberPointerType - Return the uniqued reference to the type for a 1270/// member pointer to the specified type, in the specified class. 1271QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) { 1272 // Unique pointers, to guarantee there is only one pointer of a particular 1273 // structure. 1274 llvm::FoldingSetNodeID ID; 1275 MemberPointerType::Profile(ID, T, Cls); 1276 1277 void *InsertPos = 0; 1278 if (MemberPointerType *PT = 1279 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1280 return QualType(PT, 0); 1281 1282 // If the pointee or class type isn't canonical, this won't be a canonical 1283 // type either, so fill in the canonical type field. 1284 QualType Canonical; 1285 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1286 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1287 1288 // Get the new insert position for the node we care about. 1289 MemberPointerType *NewIP = 1290 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1291 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1292 } 1293 MemberPointerType *New 1294 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1295 Types.push_back(New); 1296 MemberPointerTypes.InsertNode(New, InsertPos); 1297 return QualType(New, 0); 1298} 1299 1300/// getConstantArrayType - Return the unique reference to the type for an 1301/// array of the specified element type. 1302QualType ASTContext::getConstantArrayType(QualType EltTy, 1303 const llvm::APInt &ArySizeIn, 1304 ArrayType::ArraySizeModifier ASM, 1305 unsigned EltTypeQuals) { 1306 assert((EltTy->isDependentType() || 1307 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1308 "Constant array of VLAs is illegal!"); 1309 1310 // Convert the array size into a canonical width matching the pointer size for 1311 // the target. 1312 llvm::APInt ArySize(ArySizeIn); 1313 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1314 1315 llvm::FoldingSetNodeID ID; 1316 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1317 1318 void *InsertPos = 0; 1319 if (ConstantArrayType *ATP = 1320 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1321 return QualType(ATP, 0); 1322 1323 // If the element type isn't canonical, this won't be a canonical type either, 1324 // so fill in the canonical type field. 1325 QualType Canonical; 1326 if (!EltTy.isCanonical()) { 1327 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1328 ASM, EltTypeQuals); 1329 // Get the new insert position for the node we care about. 1330 ConstantArrayType *NewIP = 1331 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1332 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1333 } 1334 1335 ConstantArrayType *New = new(*this,TypeAlignment) 1336 ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1337 ConstantArrayTypes.InsertNode(New, InsertPos); 1338 Types.push_back(New); 1339 return QualType(New, 0); 1340} 1341 1342/// getVariableArrayType - Returns a non-unique reference to the type for a 1343/// variable array of the specified element type. 1344QualType ASTContext::getVariableArrayType(QualType EltTy, 1345 Expr *NumElts, 1346 ArrayType::ArraySizeModifier ASM, 1347 unsigned EltTypeQuals, 1348 SourceRange Brackets) { 1349 // Since we don't unique expressions, it isn't possible to unique VLA's 1350 // that have an expression provided for their size. 1351 1352 VariableArrayType *New = new(*this, TypeAlignment) 1353 VariableArrayType(EltTy, QualType(), NumElts, ASM, EltTypeQuals, Brackets); 1354 1355 VariableArrayTypes.push_back(New); 1356 Types.push_back(New); 1357 return QualType(New, 0); 1358} 1359 1360/// getDependentSizedArrayType - Returns a non-unique reference to 1361/// the type for a dependently-sized array of the specified element 1362/// type. 1363QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1364 Expr *NumElts, 1365 ArrayType::ArraySizeModifier ASM, 1366 unsigned EltTypeQuals, 1367 SourceRange Brackets) { 1368 assert((!NumElts || NumElts->isTypeDependent() || 1369 NumElts->isValueDependent()) && 1370 "Size must be type- or value-dependent!"); 1371 1372 void *InsertPos = 0; 1373 DependentSizedArrayType *Canon = 0; 1374 llvm::FoldingSetNodeID ID; 1375 1376 if (NumElts) { 1377 // Dependently-sized array types that do not have a specified 1378 // number of elements will have their sizes deduced from an 1379 // initializer. 1380 DependentSizedArrayType::Profile(ID, *this, getCanonicalType(EltTy), ASM, 1381 EltTypeQuals, NumElts); 1382 1383 Canon = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1384 } 1385 1386 DependentSizedArrayType *New; 1387 if (Canon) { 1388 // We already have a canonical version of this array type; use it as 1389 // the canonical type for a newly-built type. 1390 New = new (*this, TypeAlignment) 1391 DependentSizedArrayType(*this, EltTy, QualType(Canon, 0), 1392 NumElts, ASM, EltTypeQuals, Brackets); 1393 } else { 1394 QualType CanonEltTy = getCanonicalType(EltTy); 1395 if (CanonEltTy == EltTy) { 1396 New = new (*this, TypeAlignment) 1397 DependentSizedArrayType(*this, EltTy, QualType(), 1398 NumElts, ASM, EltTypeQuals, Brackets); 1399 1400 if (NumElts) { 1401 DependentSizedArrayType *CanonCheck 1402 = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1403 assert(!CanonCheck && "Dependent-sized canonical array type broken"); 1404 (void)CanonCheck; 1405 DependentSizedArrayTypes.InsertNode(New, InsertPos); 1406 } 1407 } else { 1408 QualType Canon = getDependentSizedArrayType(CanonEltTy, NumElts, 1409 ASM, EltTypeQuals, 1410 SourceRange()); 1411 New = new (*this, TypeAlignment) 1412 DependentSizedArrayType(*this, EltTy, Canon, 1413 NumElts, ASM, EltTypeQuals, Brackets); 1414 } 1415 } 1416 1417 Types.push_back(New); 1418 return QualType(New, 0); 1419} 1420 1421QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1422 ArrayType::ArraySizeModifier ASM, 1423 unsigned EltTypeQuals) { 1424 llvm::FoldingSetNodeID ID; 1425 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1426 1427 void *InsertPos = 0; 1428 if (IncompleteArrayType *ATP = 1429 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1430 return QualType(ATP, 0); 1431 1432 // If the element type isn't canonical, this won't be a canonical type 1433 // either, so fill in the canonical type field. 1434 QualType Canonical; 1435 1436 if (!EltTy.isCanonical()) { 1437 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1438 ASM, EltTypeQuals); 1439 1440 // Get the new insert position for the node we care about. 1441 IncompleteArrayType *NewIP = 1442 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1443 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1444 } 1445 1446 IncompleteArrayType *New = new (*this, TypeAlignment) 1447 IncompleteArrayType(EltTy, Canonical, ASM, EltTypeQuals); 1448 1449 IncompleteArrayTypes.InsertNode(New, InsertPos); 1450 Types.push_back(New); 1451 return QualType(New, 0); 1452} 1453 1454/// getVectorType - Return the unique reference to a vector type of 1455/// the specified element type and size. VectorType must be a built-in type. 1456QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1457 bool IsAltiVec, bool IsPixel) { 1458 BuiltinType *baseType; 1459 1460 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1461 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1462 1463 // Check if we've already instantiated a vector of this type. 1464 llvm::FoldingSetNodeID ID; 1465 VectorType::Profile(ID, vecType, NumElts, Type::Vector, 1466 IsAltiVec, IsPixel); 1467 void *InsertPos = 0; 1468 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1469 return QualType(VTP, 0); 1470 1471 // If the element type isn't canonical, this won't be a canonical type either, 1472 // so fill in the canonical type field. 1473 QualType Canonical; 1474 if (!vecType.isCanonical() || IsAltiVec || IsPixel) { 1475 Canonical = getVectorType(getCanonicalType(vecType), 1476 NumElts, false, false); 1477 1478 // Get the new insert position for the node we care about. 1479 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1480 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1481 } 1482 VectorType *New = new (*this, TypeAlignment) 1483 VectorType(vecType, NumElts, Canonical, IsAltiVec, IsPixel); 1484 VectorTypes.InsertNode(New, InsertPos); 1485 Types.push_back(New); 1486 return QualType(New, 0); 1487} 1488 1489/// getExtVectorType - Return the unique reference to an extended vector type of 1490/// the specified element type and size. VectorType must be a built-in type. 1491QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1492 BuiltinType *baseType; 1493 1494 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1495 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1496 1497 // Check if we've already instantiated a vector of this type. 1498 llvm::FoldingSetNodeID ID; 1499 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, false, false); 1500 void *InsertPos = 0; 1501 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1502 return QualType(VTP, 0); 1503 1504 // If the element type isn't canonical, this won't be a canonical type either, 1505 // so fill in the canonical type field. 1506 QualType Canonical; 1507 if (!vecType.isCanonical()) { 1508 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1509 1510 // Get the new insert position for the node we care about. 1511 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1512 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1513 } 1514 ExtVectorType *New = new (*this, TypeAlignment) 1515 ExtVectorType(vecType, NumElts, Canonical); 1516 VectorTypes.InsertNode(New, InsertPos); 1517 Types.push_back(New); 1518 return QualType(New, 0); 1519} 1520 1521QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1522 Expr *SizeExpr, 1523 SourceLocation AttrLoc) { 1524 llvm::FoldingSetNodeID ID; 1525 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1526 SizeExpr); 1527 1528 void *InsertPos = 0; 1529 DependentSizedExtVectorType *Canon 1530 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1531 DependentSizedExtVectorType *New; 1532 if (Canon) { 1533 // We already have a canonical version of this array type; use it as 1534 // the canonical type for a newly-built type. 1535 New = new (*this, TypeAlignment) 1536 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1537 SizeExpr, AttrLoc); 1538 } else { 1539 QualType CanonVecTy = getCanonicalType(vecType); 1540 if (CanonVecTy == vecType) { 1541 New = new (*this, TypeAlignment) 1542 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1543 AttrLoc); 1544 1545 DependentSizedExtVectorType *CanonCheck 1546 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1547 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1548 (void)CanonCheck; 1549 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1550 } else { 1551 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1552 SourceLocation()); 1553 New = new (*this, TypeAlignment) 1554 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1555 } 1556 } 1557 1558 Types.push_back(New); 1559 return QualType(New, 0); 1560} 1561 1562/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1563/// 1564QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, 1565 const FunctionType::ExtInfo &Info) { 1566 const CallingConv CallConv = Info.getCC(); 1567 // Unique functions, to guarantee there is only one function of a particular 1568 // structure. 1569 llvm::FoldingSetNodeID ID; 1570 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1571 1572 void *InsertPos = 0; 1573 if (FunctionNoProtoType *FT = 1574 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1575 return QualType(FT, 0); 1576 1577 QualType Canonical; 1578 if (!ResultTy.isCanonical() || 1579 getCanonicalCallConv(CallConv) != CallConv) { 1580 Canonical = 1581 getFunctionNoProtoType(getCanonicalType(ResultTy), 1582 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1583 1584 // Get the new insert position for the node we care about. 1585 FunctionNoProtoType *NewIP = 1586 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1587 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1588 } 1589 1590 FunctionNoProtoType *New = new (*this, TypeAlignment) 1591 FunctionNoProtoType(ResultTy, Canonical, Info); 1592 Types.push_back(New); 1593 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1594 return QualType(New, 0); 1595} 1596 1597/// getFunctionType - Return a normal function type with a typed argument 1598/// list. isVariadic indicates whether the argument list includes '...'. 1599QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1600 unsigned NumArgs, bool isVariadic, 1601 unsigned TypeQuals, bool hasExceptionSpec, 1602 bool hasAnyExceptionSpec, unsigned NumExs, 1603 const QualType *ExArray, 1604 const FunctionType::ExtInfo &Info) { 1605 const CallingConv CallConv= Info.getCC(); 1606 // Unique functions, to guarantee there is only one function of a particular 1607 // structure. 1608 llvm::FoldingSetNodeID ID; 1609 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1610 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1611 NumExs, ExArray, Info); 1612 1613 void *InsertPos = 0; 1614 if (FunctionProtoType *FTP = 1615 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1616 return QualType(FTP, 0); 1617 1618 // Determine whether the type being created is already canonical or not. 1619 bool isCanonical = !hasExceptionSpec && ResultTy.isCanonical(); 1620 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1621 if (!ArgArray[i].isCanonicalAsParam()) 1622 isCanonical = false; 1623 1624 // If this type isn't canonical, get the canonical version of it. 1625 // The exception spec is not part of the canonical type. 1626 QualType Canonical; 1627 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1628 llvm::SmallVector<QualType, 16> CanonicalArgs; 1629 CanonicalArgs.reserve(NumArgs); 1630 for (unsigned i = 0; i != NumArgs; ++i) 1631 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1632 1633 Canonical = getFunctionType(getCanonicalType(ResultTy), 1634 CanonicalArgs.data(), NumArgs, 1635 isVariadic, TypeQuals, false, 1636 false, 0, 0, 1637 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1638 1639 // Get the new insert position for the node we care about. 1640 FunctionProtoType *NewIP = 1641 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1642 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1643 } 1644 1645 // FunctionProtoType objects are allocated with extra bytes after them 1646 // for two variable size arrays (for parameter and exception types) at the 1647 // end of them. 1648 FunctionProtoType *FTP = 1649 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1650 NumArgs*sizeof(QualType) + 1651 NumExs*sizeof(QualType), TypeAlignment); 1652 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1653 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1654 ExArray, NumExs, Canonical, Info); 1655 Types.push_back(FTP); 1656 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1657 return QualType(FTP, 0); 1658} 1659 1660#ifndef NDEBUG 1661static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1662 if (!isa<CXXRecordDecl>(D)) return false; 1663 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1664 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1665 return true; 1666 if (RD->getDescribedClassTemplate() && 1667 !isa<ClassTemplateSpecializationDecl>(RD)) 1668 return true; 1669 return false; 1670} 1671#endif 1672 1673/// getInjectedClassNameType - Return the unique reference to the 1674/// injected class name type for the specified templated declaration. 1675QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1676 QualType TST) { 1677 assert(NeedsInjectedClassNameType(Decl)); 1678 if (Decl->TypeForDecl) { 1679 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1680 } else if (CXXRecordDecl *PrevDecl 1681 = cast_or_null<CXXRecordDecl>(Decl->getPreviousDeclaration())) { 1682 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1683 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1684 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1685 } else { 1686 Decl->TypeForDecl = 1687 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 1688 Types.push_back(Decl->TypeForDecl); 1689 } 1690 return QualType(Decl->TypeForDecl, 0); 1691} 1692 1693/// getTypeDeclType - Return the unique reference to the type for the 1694/// specified type declaration. 1695QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) { 1696 assert(Decl && "Passed null for Decl param"); 1697 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 1698 1699 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1700 return getTypedefType(Typedef); 1701 1702 if (const ObjCInterfaceDecl *ObjCInterface 1703 = dyn_cast<ObjCInterfaceDecl>(Decl)) 1704 return getObjCInterfaceType(ObjCInterface); 1705 1706 assert(!isa<TemplateTypeParmDecl>(Decl) && 1707 "Template type parameter types are always available."); 1708 1709 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1710 assert(!Record->getPreviousDeclaration() && 1711 "struct/union has previous declaration"); 1712 assert(!NeedsInjectedClassNameType(Record)); 1713 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Record); 1714 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1715 assert(!Enum->getPreviousDeclaration() && 1716 "enum has previous declaration"); 1717 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Enum); 1718 } else if (const UnresolvedUsingTypenameDecl *Using = 1719 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1720 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1721 } else 1722 llvm_unreachable("TypeDecl without a type?"); 1723 1724 Types.push_back(Decl->TypeForDecl); 1725 return QualType(Decl->TypeForDecl, 0); 1726} 1727 1728/// getTypedefType - Return the unique reference to the type for the 1729/// specified typename decl. 1730QualType ASTContext::getTypedefType(const TypedefDecl *Decl) { 1731 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1732 1733 QualType Canonical = getCanonicalType(Decl->getUnderlyingType()); 1734 Decl->TypeForDecl = new(*this, TypeAlignment) 1735 TypedefType(Type::Typedef, Decl, Canonical); 1736 Types.push_back(Decl->TypeForDecl); 1737 return QualType(Decl->TypeForDecl, 0); 1738} 1739 1740/// \brief Retrieve a substitution-result type. 1741QualType 1742ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1743 QualType Replacement) { 1744 assert(Replacement.isCanonical() 1745 && "replacement types must always be canonical"); 1746 1747 llvm::FoldingSetNodeID ID; 1748 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1749 void *InsertPos = 0; 1750 SubstTemplateTypeParmType *SubstParm 1751 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1752 1753 if (!SubstParm) { 1754 SubstParm = new (*this, TypeAlignment) 1755 SubstTemplateTypeParmType(Parm, Replacement); 1756 Types.push_back(SubstParm); 1757 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1758 } 1759 1760 return QualType(SubstParm, 0); 1761} 1762 1763/// \brief Retrieve the template type parameter type for a template 1764/// parameter or parameter pack with the given depth, index, and (optionally) 1765/// name. 1766QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1767 bool ParameterPack, 1768 IdentifierInfo *Name) { 1769 llvm::FoldingSetNodeID ID; 1770 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1771 void *InsertPos = 0; 1772 TemplateTypeParmType *TypeParm 1773 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1774 1775 if (TypeParm) 1776 return QualType(TypeParm, 0); 1777 1778 if (Name) { 1779 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1780 TypeParm = new (*this, TypeAlignment) 1781 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 1782 1783 TemplateTypeParmType *TypeCheck 1784 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1785 assert(!TypeCheck && "Template type parameter canonical type broken"); 1786 (void)TypeCheck; 1787 } else 1788 TypeParm = new (*this, TypeAlignment) 1789 TemplateTypeParmType(Depth, Index, ParameterPack); 1790 1791 Types.push_back(TypeParm); 1792 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1793 1794 return QualType(TypeParm, 0); 1795} 1796 1797TypeSourceInfo * 1798ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 1799 SourceLocation NameLoc, 1800 const TemplateArgumentListInfo &Args, 1801 QualType CanonType) { 1802 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 1803 1804 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 1805 TemplateSpecializationTypeLoc TL 1806 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 1807 TL.setTemplateNameLoc(NameLoc); 1808 TL.setLAngleLoc(Args.getLAngleLoc()); 1809 TL.setRAngleLoc(Args.getRAngleLoc()); 1810 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 1811 TL.setArgLocInfo(i, Args[i].getLocInfo()); 1812 return DI; 1813} 1814 1815QualType 1816ASTContext::getTemplateSpecializationType(TemplateName Template, 1817 const TemplateArgumentListInfo &Args, 1818 QualType Canon, 1819 bool IsCurrentInstantiation) { 1820 unsigned NumArgs = Args.size(); 1821 1822 llvm::SmallVector<TemplateArgument, 4> ArgVec; 1823 ArgVec.reserve(NumArgs); 1824 for (unsigned i = 0; i != NumArgs; ++i) 1825 ArgVec.push_back(Args[i].getArgument()); 1826 1827 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 1828 Canon, IsCurrentInstantiation); 1829} 1830 1831QualType 1832ASTContext::getTemplateSpecializationType(TemplateName Template, 1833 const TemplateArgument *Args, 1834 unsigned NumArgs, 1835 QualType Canon, 1836 bool IsCurrentInstantiation) { 1837 if (!Canon.isNull()) 1838 Canon = getCanonicalType(Canon); 1839 else { 1840 assert(!IsCurrentInstantiation && 1841 "current-instantiation specializations should always " 1842 "have a canonical type"); 1843 1844 // Build the canonical template specialization type. 1845 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 1846 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 1847 CanonArgs.reserve(NumArgs); 1848 for (unsigned I = 0; I != NumArgs; ++I) 1849 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 1850 1851 // Determine whether this canonical template specialization type already 1852 // exists. 1853 llvm::FoldingSetNodeID ID; 1854 TemplateSpecializationType::Profile(ID, CanonTemplate, false, 1855 CanonArgs.data(), NumArgs, *this); 1856 1857 void *InsertPos = 0; 1858 TemplateSpecializationType *Spec 1859 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1860 1861 if (!Spec) { 1862 // Allocate a new canonical template specialization type. 1863 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1864 sizeof(TemplateArgument) * NumArgs), 1865 TypeAlignment); 1866 Spec = new (Mem) TemplateSpecializationType(*this, CanonTemplate, false, 1867 CanonArgs.data(), NumArgs, 1868 Canon); 1869 Types.push_back(Spec); 1870 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1871 } 1872 1873 if (Canon.isNull()) 1874 Canon = QualType(Spec, 0); 1875 assert(Canon->isDependentType() && 1876 "Non-dependent template-id type must have a canonical type"); 1877 } 1878 1879 // Allocate the (non-canonical) template specialization type, but don't 1880 // try to unique it: these types typically have location information that 1881 // we don't unique and don't want to lose. 1882 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1883 sizeof(TemplateArgument) * NumArgs), 1884 TypeAlignment); 1885 TemplateSpecializationType *Spec 1886 = new (Mem) TemplateSpecializationType(*this, Template, 1887 IsCurrentInstantiation, 1888 Args, NumArgs, 1889 Canon); 1890 1891 Types.push_back(Spec); 1892 return QualType(Spec, 0); 1893} 1894 1895QualType 1896ASTContext::getQualifiedNameType(NestedNameSpecifier *NNS, 1897 QualType NamedType) { 1898 llvm::FoldingSetNodeID ID; 1899 QualifiedNameType::Profile(ID, NNS, NamedType); 1900 1901 void *InsertPos = 0; 1902 QualifiedNameType *T 1903 = QualifiedNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1904 if (T) 1905 return QualType(T, 0); 1906 1907 QualType Canon = NamedType; 1908 if (!Canon.isCanonical()) { 1909 Canon = getCanonicalType(NamedType); 1910 QualifiedNameType *CheckT 1911 = QualifiedNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1912 assert(!CheckT && "Qualified name canonical type broken"); 1913 (void)CheckT; 1914 } 1915 1916 T = new (*this) QualifiedNameType(NNS, NamedType, Canon); 1917 Types.push_back(T); 1918 QualifiedNameTypes.InsertNode(T, InsertPos); 1919 return QualType(T, 0); 1920} 1921 1922QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 1923 NestedNameSpecifier *NNS, 1924 const IdentifierInfo *Name, 1925 QualType Canon) { 1926 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1927 1928 if (Canon.isNull()) { 1929 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1930 ElaboratedTypeKeyword CanonKeyword = Keyword; 1931 if (Keyword == ETK_None) 1932 CanonKeyword = ETK_Typename; 1933 1934 if (CanonNNS != NNS || CanonKeyword != Keyword) 1935 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 1936 } 1937 1938 llvm::FoldingSetNodeID ID; 1939 DependentNameType::Profile(ID, Keyword, NNS, Name); 1940 1941 void *InsertPos = 0; 1942 DependentNameType *T 1943 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1944 if (T) 1945 return QualType(T, 0); 1946 1947 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 1948 Types.push_back(T); 1949 DependentNameTypes.InsertNode(T, InsertPos); 1950 return QualType(T, 0); 1951} 1952 1953QualType 1954ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 1955 NestedNameSpecifier *NNS, 1956 const TemplateSpecializationType *TemplateId, 1957 QualType Canon) { 1958 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1959 1960 llvm::FoldingSetNodeID ID; 1961 DependentNameType::Profile(ID, Keyword, NNS, TemplateId); 1962 1963 void *InsertPos = 0; 1964 DependentNameType *T 1965 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1966 if (T) 1967 return QualType(T, 0); 1968 1969 if (Canon.isNull()) { 1970 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1971 QualType CanonType = getCanonicalType(QualType(TemplateId, 0)); 1972 ElaboratedTypeKeyword CanonKeyword = Keyword; 1973 if (Keyword == ETK_None) 1974 CanonKeyword = ETK_Typename; 1975 if (CanonNNS != NNS || CanonKeyword != Keyword || 1976 CanonType != QualType(TemplateId, 0)) { 1977 const TemplateSpecializationType *CanonTemplateId 1978 = CanonType->getAs<TemplateSpecializationType>(); 1979 assert(CanonTemplateId && 1980 "Canonical type must also be a template specialization type"); 1981 Canon = getDependentNameType(CanonKeyword, CanonNNS, CanonTemplateId); 1982 } 1983 1984 DependentNameType *CheckT 1985 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1986 assert(!CheckT && "Typename canonical type is broken"); (void)CheckT; 1987 } 1988 1989 T = new (*this) DependentNameType(Keyword, NNS, TemplateId, Canon); 1990 Types.push_back(T); 1991 DependentNameTypes.InsertNode(T, InsertPos); 1992 return QualType(T, 0); 1993} 1994 1995QualType 1996ASTContext::getElaboratedType(QualType UnderlyingType, 1997 ElaboratedType::TagKind Tag) { 1998 llvm::FoldingSetNodeID ID; 1999 ElaboratedType::Profile(ID, UnderlyingType, Tag); 2000 2001 void *InsertPos = 0; 2002 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2003 if (T) 2004 return QualType(T, 0); 2005 2006 QualType Canon = UnderlyingType; 2007 if (!Canon.isCanonical()) { 2008 Canon = getCanonicalType(Canon); 2009 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2010 assert(!CheckT && "Elaborated canonical type is broken"); (void)CheckT; 2011 } 2012 2013 T = new (*this) ElaboratedType(UnderlyingType, Tag, Canon); 2014 Types.push_back(T); 2015 ElaboratedTypes.InsertNode(T, InsertPos); 2016 return QualType(T, 0); 2017} 2018 2019/// CmpProtocolNames - Comparison predicate for sorting protocols 2020/// alphabetically. 2021static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2022 const ObjCProtocolDecl *RHS) { 2023 return LHS->getDeclName() < RHS->getDeclName(); 2024} 2025 2026static bool areSortedAndUniqued(ObjCProtocolDecl **Protocols, 2027 unsigned NumProtocols) { 2028 if (NumProtocols == 0) return true; 2029 2030 for (unsigned i = 1; i != NumProtocols; ++i) 2031 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2032 return false; 2033 return true; 2034} 2035 2036static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2037 unsigned &NumProtocols) { 2038 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2039 2040 // Sort protocols, keyed by name. 2041 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2042 2043 // Remove duplicates. 2044 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2045 NumProtocols = ProtocolsEnd-Protocols; 2046} 2047 2048/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2049/// the given interface decl and the conforming protocol list. 2050QualType ASTContext::getObjCObjectPointerType(QualType InterfaceT, 2051 ObjCProtocolDecl **Protocols, 2052 unsigned NumProtocols, 2053 unsigned Quals) { 2054 llvm::FoldingSetNodeID ID; 2055 ObjCObjectPointerType::Profile(ID, InterfaceT, Protocols, NumProtocols); 2056 Qualifiers Qs = Qualifiers::fromCVRMask(Quals); 2057 2058 void *InsertPos = 0; 2059 if (ObjCObjectPointerType *QT = 2060 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2061 return getQualifiedType(QualType(QT, 0), Qs); 2062 2063 // Sort the protocol list alphabetically to canonicalize it. 2064 QualType Canonical; 2065 if (!InterfaceT.isCanonical() || 2066 !areSortedAndUniqued(Protocols, NumProtocols)) { 2067 if (!areSortedAndUniqued(Protocols, NumProtocols)) { 2068 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2069 Protocols + NumProtocols); 2070 unsigned UniqueCount = NumProtocols; 2071 2072 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2073 2074 Canonical = getObjCObjectPointerType(getCanonicalType(InterfaceT), 2075 &Sorted[0], UniqueCount); 2076 } else { 2077 Canonical = getObjCObjectPointerType(getCanonicalType(InterfaceT), 2078 Protocols, NumProtocols); 2079 } 2080 2081 // Regenerate InsertPos. 2082 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2083 } 2084 2085 // No match. 2086 unsigned Size = sizeof(ObjCObjectPointerType) 2087 + NumProtocols * sizeof(ObjCProtocolDecl *); 2088 void *Mem = Allocate(Size, TypeAlignment); 2089 ObjCObjectPointerType *QType = new (Mem) ObjCObjectPointerType(Canonical, 2090 InterfaceT, 2091 Protocols, 2092 NumProtocols); 2093 2094 Types.push_back(QType); 2095 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2096 return getQualifiedType(QualType(QType, 0), Qs); 2097} 2098 2099/// getObjCInterfaceType - Return the unique reference to the type for the 2100/// specified ObjC interface decl. The list of protocols is optional. 2101QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 2102 ObjCProtocolDecl **Protocols, unsigned NumProtocols) { 2103 llvm::FoldingSetNodeID ID; 2104 ObjCInterfaceType::Profile(ID, Decl, Protocols, NumProtocols); 2105 2106 void *InsertPos = 0; 2107 if (ObjCInterfaceType *QT = 2108 ObjCInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos)) 2109 return QualType(QT, 0); 2110 2111 // Sort the protocol list alphabetically to canonicalize it. 2112 QualType Canonical; 2113 if (NumProtocols && !areSortedAndUniqued(Protocols, NumProtocols)) { 2114 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2115 Protocols + NumProtocols); 2116 2117 unsigned UniqueCount = NumProtocols; 2118 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2119 2120 Canonical = getObjCInterfaceType(Decl, &Sorted[0], UniqueCount); 2121 2122 ObjCInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos); 2123 } 2124 2125 unsigned Size = sizeof(ObjCInterfaceType) 2126 + NumProtocols * sizeof(ObjCProtocolDecl *); 2127 void *Mem = Allocate(Size, TypeAlignment); 2128 ObjCInterfaceType *QType = new (Mem) ObjCInterfaceType(Canonical, 2129 const_cast<ObjCInterfaceDecl*>(Decl), 2130 Protocols, 2131 NumProtocols); 2132 2133 Types.push_back(QType); 2134 ObjCInterfaceTypes.InsertNode(QType, InsertPos); 2135 return QualType(QType, 0); 2136} 2137 2138/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2139/// TypeOfExprType AST's (since expression's are never shared). For example, 2140/// multiple declarations that refer to "typeof(x)" all contain different 2141/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2142/// on canonical type's (which are always unique). 2143QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2144 TypeOfExprType *toe; 2145 if (tofExpr->isTypeDependent()) { 2146 llvm::FoldingSetNodeID ID; 2147 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2148 2149 void *InsertPos = 0; 2150 DependentTypeOfExprType *Canon 2151 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2152 if (Canon) { 2153 // We already have a "canonical" version of an identical, dependent 2154 // typeof(expr) type. Use that as our canonical type. 2155 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2156 QualType((TypeOfExprType*)Canon, 0)); 2157 } 2158 else { 2159 // Build a new, canonical typeof(expr) type. 2160 Canon 2161 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2162 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2163 toe = Canon; 2164 } 2165 } else { 2166 QualType Canonical = getCanonicalType(tofExpr->getType()); 2167 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2168 } 2169 Types.push_back(toe); 2170 return QualType(toe, 0); 2171} 2172 2173/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2174/// TypeOfType AST's. The only motivation to unique these nodes would be 2175/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2176/// an issue. This doesn't effect the type checker, since it operates 2177/// on canonical type's (which are always unique). 2178QualType ASTContext::getTypeOfType(QualType tofType) { 2179 QualType Canonical = getCanonicalType(tofType); 2180 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2181 Types.push_back(tot); 2182 return QualType(tot, 0); 2183} 2184 2185/// getDecltypeForExpr - Given an expr, will return the decltype for that 2186/// expression, according to the rules in C++0x [dcl.type.simple]p4 2187static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2188 if (e->isTypeDependent()) 2189 return Context.DependentTy; 2190 2191 // If e is an id expression or a class member access, decltype(e) is defined 2192 // as the type of the entity named by e. 2193 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2194 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2195 return VD->getType(); 2196 } 2197 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2198 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2199 return FD->getType(); 2200 } 2201 // If e is a function call or an invocation of an overloaded operator, 2202 // (parentheses around e are ignored), decltype(e) is defined as the 2203 // return type of that function. 2204 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2205 return CE->getCallReturnType(); 2206 2207 QualType T = e->getType(); 2208 2209 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2210 // defined as T&, otherwise decltype(e) is defined as T. 2211 if (e->isLvalue(Context) == Expr::LV_Valid) 2212 T = Context.getLValueReferenceType(T); 2213 2214 return T; 2215} 2216 2217/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2218/// DecltypeType AST's. The only motivation to unique these nodes would be 2219/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2220/// an issue. This doesn't effect the type checker, since it operates 2221/// on canonical type's (which are always unique). 2222QualType ASTContext::getDecltypeType(Expr *e) { 2223 DecltypeType *dt; 2224 if (e->isTypeDependent()) { 2225 llvm::FoldingSetNodeID ID; 2226 DependentDecltypeType::Profile(ID, *this, e); 2227 2228 void *InsertPos = 0; 2229 DependentDecltypeType *Canon 2230 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2231 if (Canon) { 2232 // We already have a "canonical" version of an equivalent, dependent 2233 // decltype type. Use that as our canonical type. 2234 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2235 QualType((DecltypeType*)Canon, 0)); 2236 } 2237 else { 2238 // Build a new, canonical typeof(expr) type. 2239 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2240 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2241 dt = Canon; 2242 } 2243 } else { 2244 QualType T = getDecltypeForExpr(e, *this); 2245 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2246 } 2247 Types.push_back(dt); 2248 return QualType(dt, 0); 2249} 2250 2251/// getTagDeclType - Return the unique reference to the type for the 2252/// specified TagDecl (struct/union/class/enum) decl. 2253QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2254 assert (Decl); 2255 // FIXME: What is the design on getTagDeclType when it requires casting 2256 // away const? mutable? 2257 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2258} 2259 2260/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2261/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2262/// needs to agree with the definition in <stddef.h>. 2263CanQualType ASTContext::getSizeType() const { 2264 return getFromTargetType(Target.getSizeType()); 2265} 2266 2267/// getSignedWCharType - Return the type of "signed wchar_t". 2268/// Used when in C++, as a GCC extension. 2269QualType ASTContext::getSignedWCharType() const { 2270 // FIXME: derive from "Target" ? 2271 return WCharTy; 2272} 2273 2274/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2275/// Used when in C++, as a GCC extension. 2276QualType ASTContext::getUnsignedWCharType() const { 2277 // FIXME: derive from "Target" ? 2278 return UnsignedIntTy; 2279} 2280 2281/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2282/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2283QualType ASTContext::getPointerDiffType() const { 2284 return getFromTargetType(Target.getPtrDiffType(0)); 2285} 2286 2287//===----------------------------------------------------------------------===// 2288// Type Operators 2289//===----------------------------------------------------------------------===// 2290 2291CanQualType ASTContext::getCanonicalParamType(QualType T) { 2292 // Push qualifiers into arrays, and then discard any remaining 2293 // qualifiers. 2294 T = getCanonicalType(T); 2295 const Type *Ty = T.getTypePtr(); 2296 2297 QualType Result; 2298 if (isa<ArrayType>(Ty)) { 2299 Result = getArrayDecayedType(QualType(Ty,0)); 2300 } else if (isa<FunctionType>(Ty)) { 2301 Result = getPointerType(QualType(Ty, 0)); 2302 } else { 2303 Result = QualType(Ty, 0); 2304 } 2305 2306 return CanQualType::CreateUnsafe(Result); 2307} 2308 2309/// getCanonicalType - Return the canonical (structural) type corresponding to 2310/// the specified potentially non-canonical type. The non-canonical version 2311/// of a type may have many "decorated" versions of types. Decorators can 2312/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2313/// to be free of any of these, allowing two canonical types to be compared 2314/// for exact equality with a simple pointer comparison. 2315CanQualType ASTContext::getCanonicalType(QualType T) { 2316 QualifierCollector Quals; 2317 const Type *Ptr = Quals.strip(T); 2318 QualType CanType = Ptr->getCanonicalTypeInternal(); 2319 2320 // The canonical internal type will be the canonical type *except* 2321 // that we push type qualifiers down through array types. 2322 2323 // If there are no new qualifiers to push down, stop here. 2324 if (!Quals.hasQualifiers()) 2325 return CanQualType::CreateUnsafe(CanType); 2326 2327 // If the type qualifiers are on an array type, get the canonical 2328 // type of the array with the qualifiers applied to the element 2329 // type. 2330 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2331 if (!AT) 2332 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2333 2334 // Get the canonical version of the element with the extra qualifiers on it. 2335 // This can recursively sink qualifiers through multiple levels of arrays. 2336 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2337 NewEltTy = getCanonicalType(NewEltTy); 2338 2339 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2340 return CanQualType::CreateUnsafe( 2341 getConstantArrayType(NewEltTy, CAT->getSize(), 2342 CAT->getSizeModifier(), 2343 CAT->getIndexTypeCVRQualifiers())); 2344 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2345 return CanQualType::CreateUnsafe( 2346 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2347 IAT->getIndexTypeCVRQualifiers())); 2348 2349 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2350 return CanQualType::CreateUnsafe( 2351 getDependentSizedArrayType(NewEltTy, 2352 DSAT->getSizeExpr() ? 2353 DSAT->getSizeExpr()->Retain() : 0, 2354 DSAT->getSizeModifier(), 2355 DSAT->getIndexTypeCVRQualifiers(), 2356 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2357 2358 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2359 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2360 VAT->getSizeExpr() ? 2361 VAT->getSizeExpr()->Retain() : 0, 2362 VAT->getSizeModifier(), 2363 VAT->getIndexTypeCVRQualifiers(), 2364 VAT->getBracketsRange())); 2365} 2366 2367QualType ASTContext::getUnqualifiedArrayType(QualType T, 2368 Qualifiers &Quals) { 2369 Quals = T.getQualifiers(); 2370 if (!isa<ArrayType>(T)) { 2371 return T.getUnqualifiedType(); 2372 } 2373 2374 const ArrayType *AT = cast<ArrayType>(T); 2375 QualType Elt = AT->getElementType(); 2376 QualType UnqualElt = getUnqualifiedArrayType(Elt, Quals); 2377 if (Elt == UnqualElt) 2378 return T; 2379 2380 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(T)) { 2381 return getConstantArrayType(UnqualElt, CAT->getSize(), 2382 CAT->getSizeModifier(), 0); 2383 } 2384 2385 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(T)) { 2386 return getIncompleteArrayType(UnqualElt, IAT->getSizeModifier(), 0); 2387 } 2388 2389 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(T); 2390 return getDependentSizedArrayType(UnqualElt, DSAT->getSizeExpr()->Retain(), 2391 DSAT->getSizeModifier(), 0, 2392 SourceRange()); 2393} 2394 2395DeclarationName ASTContext::getNameForTemplate(TemplateName Name) { 2396 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2397 return TD->getDeclName(); 2398 2399 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2400 if (DTN->isIdentifier()) { 2401 return DeclarationNames.getIdentifier(DTN->getIdentifier()); 2402 } else { 2403 return DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2404 } 2405 } 2406 2407 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2408 assert(Storage); 2409 return (*Storage->begin())->getDeclName(); 2410} 2411 2412TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2413 // If this template name refers to a template, the canonical 2414 // template name merely stores the template itself. 2415 if (TemplateDecl *Template = Name.getAsTemplateDecl()) 2416 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2417 2418 assert(!Name.getAsOverloadedTemplate()); 2419 2420 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2421 assert(DTN && "Non-dependent template names must refer to template decls."); 2422 return DTN->CanonicalTemplateName; 2423} 2424 2425bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2426 X = getCanonicalTemplateName(X); 2427 Y = getCanonicalTemplateName(Y); 2428 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2429} 2430 2431TemplateArgument 2432ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2433 switch (Arg.getKind()) { 2434 case TemplateArgument::Null: 2435 return Arg; 2436 2437 case TemplateArgument::Expression: 2438 return Arg; 2439 2440 case TemplateArgument::Declaration: 2441 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2442 2443 case TemplateArgument::Template: 2444 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2445 2446 case TemplateArgument::Integral: 2447 return TemplateArgument(*Arg.getAsIntegral(), 2448 getCanonicalType(Arg.getIntegralType())); 2449 2450 case TemplateArgument::Type: 2451 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2452 2453 case TemplateArgument::Pack: { 2454 // FIXME: Allocate in ASTContext 2455 TemplateArgument *CanonArgs = new TemplateArgument[Arg.pack_size()]; 2456 unsigned Idx = 0; 2457 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2458 AEnd = Arg.pack_end(); 2459 A != AEnd; (void)++A, ++Idx) 2460 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2461 2462 TemplateArgument Result; 2463 Result.setArgumentPack(CanonArgs, Arg.pack_size(), false); 2464 return Result; 2465 } 2466 } 2467 2468 // Silence GCC warning 2469 assert(false && "Unhandled template argument kind"); 2470 return TemplateArgument(); 2471} 2472 2473NestedNameSpecifier * 2474ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2475 if (!NNS) 2476 return 0; 2477 2478 switch (NNS->getKind()) { 2479 case NestedNameSpecifier::Identifier: 2480 // Canonicalize the prefix but keep the identifier the same. 2481 return NestedNameSpecifier::Create(*this, 2482 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2483 NNS->getAsIdentifier()); 2484 2485 case NestedNameSpecifier::Namespace: 2486 // A namespace is canonical; build a nested-name-specifier with 2487 // this namespace and no prefix. 2488 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2489 2490 case NestedNameSpecifier::TypeSpec: 2491 case NestedNameSpecifier::TypeSpecWithTemplate: { 2492 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2493 return NestedNameSpecifier::Create(*this, 0, 2494 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2495 T.getTypePtr()); 2496 } 2497 2498 case NestedNameSpecifier::Global: 2499 // The global specifier is canonical and unique. 2500 return NNS; 2501 } 2502 2503 // Required to silence a GCC warning 2504 return 0; 2505} 2506 2507 2508const ArrayType *ASTContext::getAsArrayType(QualType T) { 2509 // Handle the non-qualified case efficiently. 2510 if (!T.hasLocalQualifiers()) { 2511 // Handle the common positive case fast. 2512 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2513 return AT; 2514 } 2515 2516 // Handle the common negative case fast. 2517 QualType CType = T->getCanonicalTypeInternal(); 2518 if (!isa<ArrayType>(CType)) 2519 return 0; 2520 2521 // Apply any qualifiers from the array type to the element type. This 2522 // implements C99 6.7.3p8: "If the specification of an array type includes 2523 // any type qualifiers, the element type is so qualified, not the array type." 2524 2525 // If we get here, we either have type qualifiers on the type, or we have 2526 // sugar such as a typedef in the way. If we have type qualifiers on the type 2527 // we must propagate them down into the element type. 2528 2529 QualifierCollector Qs; 2530 const Type *Ty = Qs.strip(T.getDesugaredType()); 2531 2532 // If we have a simple case, just return now. 2533 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2534 if (ATy == 0 || Qs.empty()) 2535 return ATy; 2536 2537 // Otherwise, we have an array and we have qualifiers on it. Push the 2538 // qualifiers into the array element type and return a new array type. 2539 // Get the canonical version of the element with the extra qualifiers on it. 2540 // This can recursively sink qualifiers through multiple levels of arrays. 2541 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2542 2543 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2544 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2545 CAT->getSizeModifier(), 2546 CAT->getIndexTypeCVRQualifiers())); 2547 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2548 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2549 IAT->getSizeModifier(), 2550 IAT->getIndexTypeCVRQualifiers())); 2551 2552 if (const DependentSizedArrayType *DSAT 2553 = dyn_cast<DependentSizedArrayType>(ATy)) 2554 return cast<ArrayType>( 2555 getDependentSizedArrayType(NewEltTy, 2556 DSAT->getSizeExpr() ? 2557 DSAT->getSizeExpr()->Retain() : 0, 2558 DSAT->getSizeModifier(), 2559 DSAT->getIndexTypeCVRQualifiers(), 2560 DSAT->getBracketsRange())); 2561 2562 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2563 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2564 VAT->getSizeExpr() ? 2565 VAT->getSizeExpr()->Retain() : 0, 2566 VAT->getSizeModifier(), 2567 VAT->getIndexTypeCVRQualifiers(), 2568 VAT->getBracketsRange())); 2569} 2570 2571 2572/// getArrayDecayedType - Return the properly qualified result of decaying the 2573/// specified array type to a pointer. This operation is non-trivial when 2574/// handling typedefs etc. The canonical type of "T" must be an array type, 2575/// this returns a pointer to a properly qualified element of the array. 2576/// 2577/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2578QualType ASTContext::getArrayDecayedType(QualType Ty) { 2579 // Get the element type with 'getAsArrayType' so that we don't lose any 2580 // typedefs in the element type of the array. This also handles propagation 2581 // of type qualifiers from the array type into the element type if present 2582 // (C99 6.7.3p8). 2583 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2584 assert(PrettyArrayType && "Not an array type!"); 2585 2586 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2587 2588 // int x[restrict 4] -> int *restrict 2589 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2590} 2591 2592QualType ASTContext::getBaseElementType(QualType QT) { 2593 QualifierCollector Qs; 2594 while (const ArrayType *AT = getAsArrayType(QualType(Qs.strip(QT), 0))) 2595 QT = AT->getElementType(); 2596 return Qs.apply(QT); 2597} 2598 2599QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2600 QualType ElemTy = AT->getElementType(); 2601 2602 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2603 return getBaseElementType(AT); 2604 2605 return ElemTy; 2606} 2607 2608/// getConstantArrayElementCount - Returns number of constant array elements. 2609uint64_t 2610ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2611 uint64_t ElementCount = 1; 2612 do { 2613 ElementCount *= CA->getSize().getZExtValue(); 2614 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2615 } while (CA); 2616 return ElementCount; 2617} 2618 2619/// getFloatingRank - Return a relative rank for floating point types. 2620/// This routine will assert if passed a built-in type that isn't a float. 2621static FloatingRank getFloatingRank(QualType T) { 2622 if (const ComplexType *CT = T->getAs<ComplexType>()) 2623 return getFloatingRank(CT->getElementType()); 2624 2625 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2626 switch (T->getAs<BuiltinType>()->getKind()) { 2627 default: assert(0 && "getFloatingRank(): not a floating type"); 2628 case BuiltinType::Float: return FloatRank; 2629 case BuiltinType::Double: return DoubleRank; 2630 case BuiltinType::LongDouble: return LongDoubleRank; 2631 } 2632} 2633 2634/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2635/// point or a complex type (based on typeDomain/typeSize). 2636/// 'typeDomain' is a real floating point or complex type. 2637/// 'typeSize' is a real floating point or complex type. 2638QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2639 QualType Domain) const { 2640 FloatingRank EltRank = getFloatingRank(Size); 2641 if (Domain->isComplexType()) { 2642 switch (EltRank) { 2643 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2644 case FloatRank: return FloatComplexTy; 2645 case DoubleRank: return DoubleComplexTy; 2646 case LongDoubleRank: return LongDoubleComplexTy; 2647 } 2648 } 2649 2650 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2651 switch (EltRank) { 2652 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2653 case FloatRank: return FloatTy; 2654 case DoubleRank: return DoubleTy; 2655 case LongDoubleRank: return LongDoubleTy; 2656 } 2657} 2658 2659/// getFloatingTypeOrder - Compare the rank of the two specified floating 2660/// point types, ignoring the domain of the type (i.e. 'double' == 2661/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2662/// LHS < RHS, return -1. 2663int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2664 FloatingRank LHSR = getFloatingRank(LHS); 2665 FloatingRank RHSR = getFloatingRank(RHS); 2666 2667 if (LHSR == RHSR) 2668 return 0; 2669 if (LHSR > RHSR) 2670 return 1; 2671 return -1; 2672} 2673 2674/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2675/// routine will assert if passed a built-in type that isn't an integer or enum, 2676/// or if it is not canonicalized. 2677unsigned ASTContext::getIntegerRank(Type *T) { 2678 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2679 if (EnumType* ET = dyn_cast<EnumType>(T)) 2680 T = ET->getDecl()->getPromotionType().getTypePtr(); 2681 2682 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2683 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2684 2685 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2686 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2687 2688 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2689 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2690 2691 switch (cast<BuiltinType>(T)->getKind()) { 2692 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2693 case BuiltinType::Bool: 2694 return 1 + (getIntWidth(BoolTy) << 3); 2695 case BuiltinType::Char_S: 2696 case BuiltinType::Char_U: 2697 case BuiltinType::SChar: 2698 case BuiltinType::UChar: 2699 return 2 + (getIntWidth(CharTy) << 3); 2700 case BuiltinType::Short: 2701 case BuiltinType::UShort: 2702 return 3 + (getIntWidth(ShortTy) << 3); 2703 case BuiltinType::Int: 2704 case BuiltinType::UInt: 2705 return 4 + (getIntWidth(IntTy) << 3); 2706 case BuiltinType::Long: 2707 case BuiltinType::ULong: 2708 return 5 + (getIntWidth(LongTy) << 3); 2709 case BuiltinType::LongLong: 2710 case BuiltinType::ULongLong: 2711 return 6 + (getIntWidth(LongLongTy) << 3); 2712 case BuiltinType::Int128: 2713 case BuiltinType::UInt128: 2714 return 7 + (getIntWidth(Int128Ty) << 3); 2715 } 2716} 2717 2718/// \brief Whether this is a promotable bitfield reference according 2719/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 2720/// 2721/// \returns the type this bit-field will promote to, or NULL if no 2722/// promotion occurs. 2723QualType ASTContext::isPromotableBitField(Expr *E) { 2724 FieldDecl *Field = E->getBitField(); 2725 if (!Field) 2726 return QualType(); 2727 2728 QualType FT = Field->getType(); 2729 2730 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 2731 uint64_t BitWidth = BitWidthAP.getZExtValue(); 2732 uint64_t IntSize = getTypeSize(IntTy); 2733 // GCC extension compatibility: if the bit-field size is less than or equal 2734 // to the size of int, it gets promoted no matter what its type is. 2735 // For instance, unsigned long bf : 4 gets promoted to signed int. 2736 if (BitWidth < IntSize) 2737 return IntTy; 2738 2739 if (BitWidth == IntSize) 2740 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 2741 2742 // Types bigger than int are not subject to promotions, and therefore act 2743 // like the base type. 2744 // FIXME: This doesn't quite match what gcc does, but what gcc does here 2745 // is ridiculous. 2746 return QualType(); 2747} 2748 2749/// getPromotedIntegerType - Returns the type that Promotable will 2750/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 2751/// integer type. 2752QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 2753 assert(!Promotable.isNull()); 2754 assert(Promotable->isPromotableIntegerType()); 2755 if (const EnumType *ET = Promotable->getAs<EnumType>()) 2756 return ET->getDecl()->getPromotionType(); 2757 if (Promotable->isSignedIntegerType()) 2758 return IntTy; 2759 uint64_t PromotableSize = getTypeSize(Promotable); 2760 uint64_t IntSize = getTypeSize(IntTy); 2761 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 2762 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 2763} 2764 2765/// getIntegerTypeOrder - Returns the highest ranked integer type: 2766/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2767/// LHS < RHS, return -1. 2768int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2769 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2770 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2771 if (LHSC == RHSC) return 0; 2772 2773 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2774 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2775 2776 unsigned LHSRank = getIntegerRank(LHSC); 2777 unsigned RHSRank = getIntegerRank(RHSC); 2778 2779 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2780 if (LHSRank == RHSRank) return 0; 2781 return LHSRank > RHSRank ? 1 : -1; 2782 } 2783 2784 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2785 if (LHSUnsigned) { 2786 // If the unsigned [LHS] type is larger, return it. 2787 if (LHSRank >= RHSRank) 2788 return 1; 2789 2790 // If the signed type can represent all values of the unsigned type, it 2791 // wins. Because we are dealing with 2's complement and types that are 2792 // powers of two larger than each other, this is always safe. 2793 return -1; 2794 } 2795 2796 // If the unsigned [RHS] type is larger, return it. 2797 if (RHSRank >= LHSRank) 2798 return -1; 2799 2800 // If the signed type can represent all values of the unsigned type, it 2801 // wins. Because we are dealing with 2's complement and types that are 2802 // powers of two larger than each other, this is always safe. 2803 return 1; 2804} 2805 2806static RecordDecl * 2807CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 2808 SourceLocation L, IdentifierInfo *Id) { 2809 if (Ctx.getLangOptions().CPlusPlus) 2810 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 2811 else 2812 return RecordDecl::Create(Ctx, TK, DC, L, Id); 2813} 2814 2815// getCFConstantStringType - Return the type used for constant CFStrings. 2816QualType ASTContext::getCFConstantStringType() { 2817 if (!CFConstantStringTypeDecl) { 2818 CFConstantStringTypeDecl = 2819 CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2820 &Idents.get("NSConstantString")); 2821 CFConstantStringTypeDecl->startDefinition(); 2822 2823 QualType FieldTypes[4]; 2824 2825 // const int *isa; 2826 FieldTypes[0] = getPointerType(IntTy.withConst()); 2827 // int flags; 2828 FieldTypes[1] = IntTy; 2829 // const char *str; 2830 FieldTypes[2] = getPointerType(CharTy.withConst()); 2831 // long length; 2832 FieldTypes[3] = LongTy; 2833 2834 // Create fields 2835 for (unsigned i = 0; i < 4; ++i) { 2836 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2837 SourceLocation(), 0, 2838 FieldTypes[i], /*TInfo=*/0, 2839 /*BitWidth=*/0, 2840 /*Mutable=*/false); 2841 Field->setAccess(AS_public); 2842 CFConstantStringTypeDecl->addDecl(Field); 2843 } 2844 2845 CFConstantStringTypeDecl->completeDefinition(); 2846 } 2847 2848 return getTagDeclType(CFConstantStringTypeDecl); 2849} 2850 2851void ASTContext::setCFConstantStringType(QualType T) { 2852 const RecordType *Rec = T->getAs<RecordType>(); 2853 assert(Rec && "Invalid CFConstantStringType"); 2854 CFConstantStringTypeDecl = Rec->getDecl(); 2855} 2856 2857// getNSConstantStringType - Return the type used for constant NSStrings. 2858QualType ASTContext::getNSConstantStringType() { 2859 if (!NSConstantStringTypeDecl) { 2860 NSConstantStringTypeDecl = 2861 CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2862 &Idents.get("__builtin_NSString")); 2863 NSConstantStringTypeDecl->startDefinition(); 2864 2865 QualType FieldTypes[3]; 2866 2867 // const int *isa; 2868 FieldTypes[0] = getPointerType(IntTy.withConst()); 2869 // const char *str; 2870 FieldTypes[1] = getPointerType(CharTy.withConst()); 2871 // unsigned int length; 2872 FieldTypes[2] = UnsignedIntTy; 2873 2874 // Create fields 2875 for (unsigned i = 0; i < 3; ++i) { 2876 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 2877 SourceLocation(), 0, 2878 FieldTypes[i], /*TInfo=*/0, 2879 /*BitWidth=*/0, 2880 /*Mutable=*/false); 2881 Field->setAccess(AS_public); 2882 NSConstantStringTypeDecl->addDecl(Field); 2883 } 2884 2885 NSConstantStringTypeDecl->completeDefinition(); 2886 } 2887 2888 return getTagDeclType(NSConstantStringTypeDecl); 2889} 2890 2891void ASTContext::setNSConstantStringType(QualType T) { 2892 const RecordType *Rec = T->getAs<RecordType>(); 2893 assert(Rec && "Invalid NSConstantStringType"); 2894 NSConstantStringTypeDecl = Rec->getDecl(); 2895} 2896 2897QualType ASTContext::getObjCFastEnumerationStateType() { 2898 if (!ObjCFastEnumerationStateTypeDecl) { 2899 ObjCFastEnumerationStateTypeDecl = 2900 CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2901 &Idents.get("__objcFastEnumerationState")); 2902 ObjCFastEnumerationStateTypeDecl->startDefinition(); 2903 2904 QualType FieldTypes[] = { 2905 UnsignedLongTy, 2906 getPointerType(ObjCIdTypedefType), 2907 getPointerType(UnsignedLongTy), 2908 getConstantArrayType(UnsignedLongTy, 2909 llvm::APInt(32, 5), ArrayType::Normal, 0) 2910 }; 2911 2912 for (size_t i = 0; i < 4; ++i) { 2913 FieldDecl *Field = FieldDecl::Create(*this, 2914 ObjCFastEnumerationStateTypeDecl, 2915 SourceLocation(), 0, 2916 FieldTypes[i], /*TInfo=*/0, 2917 /*BitWidth=*/0, 2918 /*Mutable=*/false); 2919 Field->setAccess(AS_public); 2920 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 2921 } 2922 2923 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 2924 } 2925 2926 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 2927} 2928 2929QualType ASTContext::getBlockDescriptorType() { 2930 if (BlockDescriptorType) 2931 return getTagDeclType(BlockDescriptorType); 2932 2933 RecordDecl *T; 2934 // FIXME: Needs the FlagAppleBlock bit. 2935 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2936 &Idents.get("__block_descriptor")); 2937 T->startDefinition(); 2938 2939 QualType FieldTypes[] = { 2940 UnsignedLongTy, 2941 UnsignedLongTy, 2942 }; 2943 2944 const char *FieldNames[] = { 2945 "reserved", 2946 "Size" 2947 }; 2948 2949 for (size_t i = 0; i < 2; ++i) { 2950 FieldDecl *Field = FieldDecl::Create(*this, 2951 T, 2952 SourceLocation(), 2953 &Idents.get(FieldNames[i]), 2954 FieldTypes[i], /*TInfo=*/0, 2955 /*BitWidth=*/0, 2956 /*Mutable=*/false); 2957 Field->setAccess(AS_public); 2958 T->addDecl(Field); 2959 } 2960 2961 T->completeDefinition(); 2962 2963 BlockDescriptorType = T; 2964 2965 return getTagDeclType(BlockDescriptorType); 2966} 2967 2968void ASTContext::setBlockDescriptorType(QualType T) { 2969 const RecordType *Rec = T->getAs<RecordType>(); 2970 assert(Rec && "Invalid BlockDescriptorType"); 2971 BlockDescriptorType = Rec->getDecl(); 2972} 2973 2974QualType ASTContext::getBlockDescriptorExtendedType() { 2975 if (BlockDescriptorExtendedType) 2976 return getTagDeclType(BlockDescriptorExtendedType); 2977 2978 RecordDecl *T; 2979 // FIXME: Needs the FlagAppleBlock bit. 2980 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2981 &Idents.get("__block_descriptor_withcopydispose")); 2982 T->startDefinition(); 2983 2984 QualType FieldTypes[] = { 2985 UnsignedLongTy, 2986 UnsignedLongTy, 2987 getPointerType(VoidPtrTy), 2988 getPointerType(VoidPtrTy) 2989 }; 2990 2991 const char *FieldNames[] = { 2992 "reserved", 2993 "Size", 2994 "CopyFuncPtr", 2995 "DestroyFuncPtr" 2996 }; 2997 2998 for (size_t i = 0; i < 4; ++i) { 2999 FieldDecl *Field = FieldDecl::Create(*this, 3000 T, 3001 SourceLocation(), 3002 &Idents.get(FieldNames[i]), 3003 FieldTypes[i], /*TInfo=*/0, 3004 /*BitWidth=*/0, 3005 /*Mutable=*/false); 3006 Field->setAccess(AS_public); 3007 T->addDecl(Field); 3008 } 3009 3010 T->completeDefinition(); 3011 3012 BlockDescriptorExtendedType = T; 3013 3014 return getTagDeclType(BlockDescriptorExtendedType); 3015} 3016 3017void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3018 const RecordType *Rec = T->getAs<RecordType>(); 3019 assert(Rec && "Invalid BlockDescriptorType"); 3020 BlockDescriptorExtendedType = Rec->getDecl(); 3021} 3022 3023bool ASTContext::BlockRequiresCopying(QualType Ty) { 3024 if (Ty->isBlockPointerType()) 3025 return true; 3026 if (isObjCNSObjectType(Ty)) 3027 return true; 3028 if (Ty->isObjCObjectPointerType()) 3029 return true; 3030 return false; 3031} 3032 3033QualType ASTContext::BuildByRefType(const char *DeclName, QualType Ty) { 3034 // type = struct __Block_byref_1_X { 3035 // void *__isa; 3036 // struct __Block_byref_1_X *__forwarding; 3037 // unsigned int __flags; 3038 // unsigned int __size; 3039 // void *__copy_helper; // as needed 3040 // void *__destroy_help // as needed 3041 // int X; 3042 // } * 3043 3044 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3045 3046 // FIXME: Move up 3047 static unsigned int UniqueBlockByRefTypeID = 0; 3048 llvm::SmallString<36> Name; 3049 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3050 ++UniqueBlockByRefTypeID << '_' << DeclName; 3051 RecordDecl *T; 3052 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 3053 &Idents.get(Name.str())); 3054 T->startDefinition(); 3055 QualType Int32Ty = IntTy; 3056 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3057 QualType FieldTypes[] = { 3058 getPointerType(VoidPtrTy), 3059 getPointerType(getTagDeclType(T)), 3060 Int32Ty, 3061 Int32Ty, 3062 getPointerType(VoidPtrTy), 3063 getPointerType(VoidPtrTy), 3064 Ty 3065 }; 3066 3067 const char *FieldNames[] = { 3068 "__isa", 3069 "__forwarding", 3070 "__flags", 3071 "__size", 3072 "__copy_helper", 3073 "__destroy_helper", 3074 DeclName, 3075 }; 3076 3077 for (size_t i = 0; i < 7; ++i) { 3078 if (!HasCopyAndDispose && i >=4 && i <= 5) 3079 continue; 3080 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3081 &Idents.get(FieldNames[i]), 3082 FieldTypes[i], /*TInfo=*/0, 3083 /*BitWidth=*/0, /*Mutable=*/false); 3084 Field->setAccess(AS_public); 3085 T->addDecl(Field); 3086 } 3087 3088 T->completeDefinition(); 3089 3090 return getPointerType(getTagDeclType(T)); 3091} 3092 3093 3094QualType ASTContext::getBlockParmType( 3095 bool BlockHasCopyDispose, 3096 llvm::SmallVector<const Expr *, 8> &BlockDeclRefDecls) { 3097 // FIXME: Move up 3098 static unsigned int UniqueBlockParmTypeID = 0; 3099 llvm::SmallString<36> Name; 3100 llvm::raw_svector_ostream(Name) << "__block_literal_" 3101 << ++UniqueBlockParmTypeID; 3102 RecordDecl *T; 3103 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 3104 &Idents.get(Name.str())); 3105 T->startDefinition(); 3106 QualType FieldTypes[] = { 3107 getPointerType(VoidPtrTy), 3108 IntTy, 3109 IntTy, 3110 getPointerType(VoidPtrTy), 3111 (BlockHasCopyDispose ? 3112 getPointerType(getBlockDescriptorExtendedType()) : 3113 getPointerType(getBlockDescriptorType())) 3114 }; 3115 3116 const char *FieldNames[] = { 3117 "__isa", 3118 "__flags", 3119 "__reserved", 3120 "__FuncPtr", 3121 "__descriptor" 3122 }; 3123 3124 for (size_t i = 0; i < 5; ++i) { 3125 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3126 &Idents.get(FieldNames[i]), 3127 FieldTypes[i], /*TInfo=*/0, 3128 /*BitWidth=*/0, /*Mutable=*/false); 3129 Field->setAccess(AS_public); 3130 T->addDecl(Field); 3131 } 3132 3133 for (size_t i = 0; i < BlockDeclRefDecls.size(); ++i) { 3134 const Expr *E = BlockDeclRefDecls[i]; 3135 const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E); 3136 clang::IdentifierInfo *Name = 0; 3137 if (BDRE) { 3138 const ValueDecl *D = BDRE->getDecl(); 3139 Name = &Idents.get(D->getName()); 3140 } 3141 QualType FieldType = E->getType(); 3142 3143 if (BDRE && BDRE->isByRef()) 3144 FieldType = BuildByRefType(BDRE->getDecl()->getNameAsCString(), 3145 FieldType); 3146 3147 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3148 Name, FieldType, /*TInfo=*/0, 3149 /*BitWidth=*/0, /*Mutable=*/false); 3150 Field->setAccess(AS_public); 3151 T->addDecl(Field); 3152 } 3153 3154 T->completeDefinition(); 3155 3156 return getPointerType(getTagDeclType(T)); 3157} 3158 3159void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3160 const RecordType *Rec = T->getAs<RecordType>(); 3161 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3162 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3163} 3164 3165// This returns true if a type has been typedefed to BOOL: 3166// typedef <type> BOOL; 3167static bool isTypeTypedefedAsBOOL(QualType T) { 3168 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3169 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3170 return II->isStr("BOOL"); 3171 3172 return false; 3173} 3174 3175/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3176/// purpose. 3177CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) { 3178 CharUnits sz = getTypeSizeInChars(type); 3179 3180 // Make all integer and enum types at least as large as an int 3181 if (sz.isPositive() && type->isIntegralType()) 3182 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3183 // Treat arrays as pointers, since that's how they're passed in. 3184 else if (type->isArrayType()) 3185 sz = getTypeSizeInChars(VoidPtrTy); 3186 return sz; 3187} 3188 3189static inline 3190std::string charUnitsToString(const CharUnits &CU) { 3191 return llvm::itostr(CU.getQuantity()); 3192} 3193 3194/// getObjCEncodingForBlockDecl - Return the encoded type for this block 3195/// declaration. 3196void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3197 std::string& S) { 3198 const BlockDecl *Decl = Expr->getBlockDecl(); 3199 QualType BlockTy = 3200 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3201 // Encode result type. 3202 getObjCEncodingForType(cast<FunctionType>(BlockTy)->getResultType(), S); 3203 // Compute size of all parameters. 3204 // Start with computing size of a pointer in number of bytes. 3205 // FIXME: There might(should) be a better way of doing this computation! 3206 SourceLocation Loc; 3207 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3208 CharUnits ParmOffset = PtrSize; 3209 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3210 E = Decl->param_end(); PI != E; ++PI) { 3211 QualType PType = (*PI)->getType(); 3212 CharUnits sz = getObjCEncodingTypeSize(PType); 3213 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3214 ParmOffset += sz; 3215 } 3216 // Size of the argument frame 3217 S += charUnitsToString(ParmOffset); 3218 // Block pointer and offset. 3219 S += "@?0"; 3220 ParmOffset = PtrSize; 3221 3222 // Argument types. 3223 ParmOffset = PtrSize; 3224 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3225 Decl->param_end(); PI != E; ++PI) { 3226 ParmVarDecl *PVDecl = *PI; 3227 QualType PType = PVDecl->getOriginalType(); 3228 if (const ArrayType *AT = 3229 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3230 // Use array's original type only if it has known number of 3231 // elements. 3232 if (!isa<ConstantArrayType>(AT)) 3233 PType = PVDecl->getType(); 3234 } else if (PType->isFunctionType()) 3235 PType = PVDecl->getType(); 3236 getObjCEncodingForType(PType, S); 3237 S += charUnitsToString(ParmOffset); 3238 ParmOffset += getObjCEncodingTypeSize(PType); 3239 } 3240} 3241 3242/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3243/// declaration. 3244void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3245 std::string& S) { 3246 // FIXME: This is not very efficient. 3247 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3248 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3249 // Encode result type. 3250 getObjCEncodingForType(Decl->getResultType(), S); 3251 // Compute size of all parameters. 3252 // Start with computing size of a pointer in number of bytes. 3253 // FIXME: There might(should) be a better way of doing this computation! 3254 SourceLocation Loc; 3255 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3256 // The first two arguments (self and _cmd) are pointers; account for 3257 // their size. 3258 CharUnits ParmOffset = 2 * PtrSize; 3259 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3260 E = Decl->sel_param_end(); PI != E; ++PI) { 3261 QualType PType = (*PI)->getType(); 3262 CharUnits sz = getObjCEncodingTypeSize(PType); 3263 assert (sz.isPositive() && 3264 "getObjCEncodingForMethodDecl - Incomplete param type"); 3265 ParmOffset += sz; 3266 } 3267 S += charUnitsToString(ParmOffset); 3268 S += "@0:"; 3269 S += charUnitsToString(PtrSize); 3270 3271 // Argument types. 3272 ParmOffset = 2 * PtrSize; 3273 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3274 E = Decl->sel_param_end(); PI != E; ++PI) { 3275 ParmVarDecl *PVDecl = *PI; 3276 QualType PType = PVDecl->getOriginalType(); 3277 if (const ArrayType *AT = 3278 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3279 // Use array's original type only if it has known number of 3280 // elements. 3281 if (!isa<ConstantArrayType>(AT)) 3282 PType = PVDecl->getType(); 3283 } else if (PType->isFunctionType()) 3284 PType = PVDecl->getType(); 3285 // Process argument qualifiers for user supplied arguments; such as, 3286 // 'in', 'inout', etc. 3287 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3288 getObjCEncodingForType(PType, S); 3289 S += charUnitsToString(ParmOffset); 3290 ParmOffset += getObjCEncodingTypeSize(PType); 3291 } 3292} 3293 3294/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3295/// property declaration. If non-NULL, Container must be either an 3296/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3297/// NULL when getting encodings for protocol properties. 3298/// Property attributes are stored as a comma-delimited C string. The simple 3299/// attributes readonly and bycopy are encoded as single characters. The 3300/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3301/// encoded as single characters, followed by an identifier. Property types 3302/// are also encoded as a parametrized attribute. The characters used to encode 3303/// these attributes are defined by the following enumeration: 3304/// @code 3305/// enum PropertyAttributes { 3306/// kPropertyReadOnly = 'R', // property is read-only. 3307/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3308/// kPropertyByref = '&', // property is a reference to the value last assigned 3309/// kPropertyDynamic = 'D', // property is dynamic 3310/// kPropertyGetter = 'G', // followed by getter selector name 3311/// kPropertySetter = 'S', // followed by setter selector name 3312/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3313/// kPropertyType = 't' // followed by old-style type encoding. 3314/// kPropertyWeak = 'W' // 'weak' property 3315/// kPropertyStrong = 'P' // property GC'able 3316/// kPropertyNonAtomic = 'N' // property non-atomic 3317/// }; 3318/// @endcode 3319void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3320 const Decl *Container, 3321 std::string& S) { 3322 // Collect information from the property implementation decl(s). 3323 bool Dynamic = false; 3324 ObjCPropertyImplDecl *SynthesizePID = 0; 3325 3326 // FIXME: Duplicated code due to poor abstraction. 3327 if (Container) { 3328 if (const ObjCCategoryImplDecl *CID = 3329 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3330 for (ObjCCategoryImplDecl::propimpl_iterator 3331 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3332 i != e; ++i) { 3333 ObjCPropertyImplDecl *PID = *i; 3334 if (PID->getPropertyDecl() == PD) { 3335 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3336 Dynamic = true; 3337 } else { 3338 SynthesizePID = PID; 3339 } 3340 } 3341 } 3342 } else { 3343 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3344 for (ObjCCategoryImplDecl::propimpl_iterator 3345 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3346 i != e; ++i) { 3347 ObjCPropertyImplDecl *PID = *i; 3348 if (PID->getPropertyDecl() == PD) { 3349 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3350 Dynamic = true; 3351 } else { 3352 SynthesizePID = PID; 3353 } 3354 } 3355 } 3356 } 3357 } 3358 3359 // FIXME: This is not very efficient. 3360 S = "T"; 3361 3362 // Encode result type. 3363 // GCC has some special rules regarding encoding of properties which 3364 // closely resembles encoding of ivars. 3365 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3366 true /* outermost type */, 3367 true /* encoding for property */); 3368 3369 if (PD->isReadOnly()) { 3370 S += ",R"; 3371 } else { 3372 switch (PD->getSetterKind()) { 3373 case ObjCPropertyDecl::Assign: break; 3374 case ObjCPropertyDecl::Copy: S += ",C"; break; 3375 case ObjCPropertyDecl::Retain: S += ",&"; break; 3376 } 3377 } 3378 3379 // It really isn't clear at all what this means, since properties 3380 // are "dynamic by default". 3381 if (Dynamic) 3382 S += ",D"; 3383 3384 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3385 S += ",N"; 3386 3387 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3388 S += ",G"; 3389 S += PD->getGetterName().getAsString(); 3390 } 3391 3392 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3393 S += ",S"; 3394 S += PD->getSetterName().getAsString(); 3395 } 3396 3397 if (SynthesizePID) { 3398 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3399 S += ",V"; 3400 S += OID->getNameAsString(); 3401 } 3402 3403 // FIXME: OBJCGC: weak & strong 3404} 3405 3406/// getLegacyIntegralTypeEncoding - 3407/// Another legacy compatibility encoding: 32-bit longs are encoded as 3408/// 'l' or 'L' , but not always. For typedefs, we need to use 3409/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3410/// 3411void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3412 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3413 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3414 if (BT->getKind() == BuiltinType::ULong && 3415 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3416 PointeeTy = UnsignedIntTy; 3417 else 3418 if (BT->getKind() == BuiltinType::Long && 3419 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3420 PointeeTy = IntTy; 3421 } 3422 } 3423} 3424 3425void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3426 const FieldDecl *Field) { 3427 // We follow the behavior of gcc, expanding structures which are 3428 // directly pointed to, and expanding embedded structures. Note that 3429 // these rules are sufficient to prevent recursive encoding of the 3430 // same type. 3431 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3432 true /* outermost type */); 3433} 3434 3435static void EncodeBitField(const ASTContext *Context, std::string& S, 3436 const FieldDecl *FD) { 3437 const Expr *E = FD->getBitWidth(); 3438 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3439 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3440 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3441 S += 'b'; 3442 S += llvm::utostr(N); 3443} 3444 3445// FIXME: Use SmallString for accumulating string. 3446void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3447 bool ExpandPointedToStructures, 3448 bool ExpandStructures, 3449 const FieldDecl *FD, 3450 bool OutermostType, 3451 bool EncodingProperty) { 3452 if (const BuiltinType *BT = T->getAs<BuiltinType>()) { 3453 if (FD && FD->isBitField()) 3454 return EncodeBitField(this, S, FD); 3455 char encoding; 3456 switch (BT->getKind()) { 3457 default: assert(0 && "Unhandled builtin type kind"); 3458 case BuiltinType::Void: encoding = 'v'; break; 3459 case BuiltinType::Bool: encoding = 'B'; break; 3460 case BuiltinType::Char_U: 3461 case BuiltinType::UChar: encoding = 'C'; break; 3462 case BuiltinType::UShort: encoding = 'S'; break; 3463 case BuiltinType::UInt: encoding = 'I'; break; 3464 case BuiltinType::ULong: 3465 encoding = 3466 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3467 break; 3468 case BuiltinType::UInt128: encoding = 'T'; break; 3469 case BuiltinType::ULongLong: encoding = 'Q'; break; 3470 case BuiltinType::Char_S: 3471 case BuiltinType::SChar: encoding = 'c'; break; 3472 case BuiltinType::Short: encoding = 's'; break; 3473 case BuiltinType::Int: encoding = 'i'; break; 3474 case BuiltinType::Long: 3475 encoding = 3476 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'l' : 'q'; 3477 break; 3478 case BuiltinType::LongLong: encoding = 'q'; break; 3479 case BuiltinType::Int128: encoding = 't'; break; 3480 case BuiltinType::Float: encoding = 'f'; break; 3481 case BuiltinType::Double: encoding = 'd'; break; 3482 case BuiltinType::LongDouble: encoding = 'd'; break; 3483 } 3484 3485 S += encoding; 3486 return; 3487 } 3488 3489 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3490 S += 'j'; 3491 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3492 false); 3493 return; 3494 } 3495 3496 // encoding for pointer or r3eference types. 3497 QualType PointeeTy; 3498 if (const PointerType *PT = T->getAs<PointerType>()) { 3499 if (PT->isObjCSelType()) { 3500 S += ':'; 3501 return; 3502 } 3503 PointeeTy = PT->getPointeeType(); 3504 } 3505 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3506 PointeeTy = RT->getPointeeType(); 3507 if (!PointeeTy.isNull()) { 3508 bool isReadOnly = false; 3509 // For historical/compatibility reasons, the read-only qualifier of the 3510 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3511 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3512 // Also, do not emit the 'r' for anything but the outermost type! 3513 if (isa<TypedefType>(T.getTypePtr())) { 3514 if (OutermostType && T.isConstQualified()) { 3515 isReadOnly = true; 3516 S += 'r'; 3517 } 3518 } else if (OutermostType) { 3519 QualType P = PointeeTy; 3520 while (P->getAs<PointerType>()) 3521 P = P->getAs<PointerType>()->getPointeeType(); 3522 if (P.isConstQualified()) { 3523 isReadOnly = true; 3524 S += 'r'; 3525 } 3526 } 3527 if (isReadOnly) { 3528 // Another legacy compatibility encoding. Some ObjC qualifier and type 3529 // combinations need to be rearranged. 3530 // Rewrite "in const" from "nr" to "rn" 3531 if (llvm::StringRef(S).endswith("nr")) 3532 S.replace(S.end()-2, S.end(), "rn"); 3533 } 3534 3535 if (PointeeTy->isCharType()) { 3536 // char pointer types should be encoded as '*' unless it is a 3537 // type that has been typedef'd to 'BOOL'. 3538 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3539 S += '*'; 3540 return; 3541 } 3542 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3543 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3544 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3545 S += '#'; 3546 return; 3547 } 3548 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3549 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3550 S += '@'; 3551 return; 3552 } 3553 // fall through... 3554 } 3555 S += '^'; 3556 getLegacyIntegralTypeEncoding(PointeeTy); 3557 3558 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3559 NULL); 3560 return; 3561 } 3562 3563 if (const ArrayType *AT = 3564 // Ignore type qualifiers etc. 3565 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3566 if (isa<IncompleteArrayType>(AT)) { 3567 // Incomplete arrays are encoded as a pointer to the array element. 3568 S += '^'; 3569 3570 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3571 false, ExpandStructures, FD); 3572 } else { 3573 S += '['; 3574 3575 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3576 S += llvm::utostr(CAT->getSize().getZExtValue()); 3577 else { 3578 //Variable length arrays are encoded as a regular array with 0 elements. 3579 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3580 S += '0'; 3581 } 3582 3583 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3584 false, ExpandStructures, FD); 3585 S += ']'; 3586 } 3587 return; 3588 } 3589 3590 if (T->getAs<FunctionType>()) { 3591 S += '?'; 3592 return; 3593 } 3594 3595 if (const RecordType *RTy = T->getAs<RecordType>()) { 3596 RecordDecl *RDecl = RTy->getDecl(); 3597 S += RDecl->isUnion() ? '(' : '{'; 3598 // Anonymous structures print as '?' 3599 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3600 S += II->getName(); 3601 if (ClassTemplateSpecializationDecl *Spec 3602 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 3603 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 3604 std::string TemplateArgsStr 3605 = TemplateSpecializationType::PrintTemplateArgumentList( 3606 TemplateArgs.getFlatArgumentList(), 3607 TemplateArgs.flat_size(), 3608 (*this).PrintingPolicy); 3609 3610 S += TemplateArgsStr; 3611 } 3612 } else { 3613 S += '?'; 3614 } 3615 if (ExpandStructures) { 3616 S += '='; 3617 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3618 FieldEnd = RDecl->field_end(); 3619 Field != FieldEnd; ++Field) { 3620 if (FD) { 3621 S += '"'; 3622 S += Field->getNameAsString(); 3623 S += '"'; 3624 } 3625 3626 // Special case bit-fields. 3627 if (Field->isBitField()) { 3628 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3629 (*Field)); 3630 } else { 3631 QualType qt = Field->getType(); 3632 getLegacyIntegralTypeEncoding(qt); 3633 getObjCEncodingForTypeImpl(qt, S, false, true, 3634 FD); 3635 } 3636 } 3637 } 3638 S += RDecl->isUnion() ? ')' : '}'; 3639 return; 3640 } 3641 3642 if (T->isEnumeralType()) { 3643 if (FD && FD->isBitField()) 3644 EncodeBitField(this, S, FD); 3645 else 3646 S += 'i'; 3647 return; 3648 } 3649 3650 if (T->isBlockPointerType()) { 3651 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3652 return; 3653 } 3654 3655 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3656 // @encode(class_name) 3657 ObjCInterfaceDecl *OI = OIT->getDecl(); 3658 S += '{'; 3659 const IdentifierInfo *II = OI->getIdentifier(); 3660 S += II->getName(); 3661 S += '='; 3662 llvm::SmallVector<FieldDecl*, 32> RecFields; 3663 CollectObjCIvars(OI, RecFields); 3664 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 3665 if (RecFields[i]->isBitField()) 3666 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3667 RecFields[i]); 3668 else 3669 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3670 FD); 3671 } 3672 S += '}'; 3673 return; 3674 } 3675 3676 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 3677 if (OPT->isObjCIdType()) { 3678 S += '@'; 3679 return; 3680 } 3681 3682 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 3683 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 3684 // Since this is a binary compatibility issue, need to consult with runtime 3685 // folks. Fortunately, this is a *very* obsure construct. 3686 S += '#'; 3687 return; 3688 } 3689 3690 if (OPT->isObjCQualifiedIdType()) { 3691 getObjCEncodingForTypeImpl(getObjCIdType(), S, 3692 ExpandPointedToStructures, 3693 ExpandStructures, FD); 3694 if (FD || EncodingProperty) { 3695 // Note that we do extended encoding of protocol qualifer list 3696 // Only when doing ivar or property encoding. 3697 S += '"'; 3698 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3699 E = OPT->qual_end(); I != E; ++I) { 3700 S += '<'; 3701 S += (*I)->getNameAsString(); 3702 S += '>'; 3703 } 3704 S += '"'; 3705 } 3706 return; 3707 } 3708 3709 QualType PointeeTy = OPT->getPointeeType(); 3710 if (!EncodingProperty && 3711 isa<TypedefType>(PointeeTy.getTypePtr())) { 3712 // Another historical/compatibility reason. 3713 // We encode the underlying type which comes out as 3714 // {...}; 3715 S += '^'; 3716 getObjCEncodingForTypeImpl(PointeeTy, S, 3717 false, ExpandPointedToStructures, 3718 NULL); 3719 return; 3720 } 3721 3722 S += '@'; 3723 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 3724 S += '"'; 3725 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 3726 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3727 E = OPT->qual_end(); I != E; ++I) { 3728 S += '<'; 3729 S += (*I)->getNameAsString(); 3730 S += '>'; 3731 } 3732 S += '"'; 3733 } 3734 return; 3735 } 3736 3737 assert(0 && "@encode for type not implemented!"); 3738} 3739 3740void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 3741 std::string& S) const { 3742 if (QT & Decl::OBJC_TQ_In) 3743 S += 'n'; 3744 if (QT & Decl::OBJC_TQ_Inout) 3745 S += 'N'; 3746 if (QT & Decl::OBJC_TQ_Out) 3747 S += 'o'; 3748 if (QT & Decl::OBJC_TQ_Bycopy) 3749 S += 'O'; 3750 if (QT & Decl::OBJC_TQ_Byref) 3751 S += 'R'; 3752 if (QT & Decl::OBJC_TQ_Oneway) 3753 S += 'V'; 3754} 3755 3756void ASTContext::setBuiltinVaListType(QualType T) { 3757 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 3758 3759 BuiltinVaListType = T; 3760} 3761 3762void ASTContext::setObjCIdType(QualType T) { 3763 ObjCIdTypedefType = T; 3764} 3765 3766void ASTContext::setObjCSelType(QualType T) { 3767 ObjCSelTypedefType = T; 3768} 3769 3770void ASTContext::setObjCProtoType(QualType QT) { 3771 ObjCProtoType = QT; 3772} 3773 3774void ASTContext::setObjCClassType(QualType T) { 3775 ObjCClassTypedefType = T; 3776} 3777 3778void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 3779 assert(ObjCConstantStringType.isNull() && 3780 "'NSConstantString' type already set!"); 3781 3782 ObjCConstantStringType = getObjCInterfaceType(Decl); 3783} 3784 3785/// \brief Retrieve the template name that corresponds to a non-empty 3786/// lookup. 3787TemplateName ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 3788 UnresolvedSetIterator End) { 3789 unsigned size = End - Begin; 3790 assert(size > 1 && "set is not overloaded!"); 3791 3792 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 3793 size * sizeof(FunctionTemplateDecl*)); 3794 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 3795 3796 NamedDecl **Storage = OT->getStorage(); 3797 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 3798 NamedDecl *D = *I; 3799 assert(isa<FunctionTemplateDecl>(D) || 3800 (isa<UsingShadowDecl>(D) && 3801 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 3802 *Storage++ = D; 3803 } 3804 3805 return TemplateName(OT); 3806} 3807 3808/// \brief Retrieve the template name that represents a qualified 3809/// template name such as \c std::vector. 3810TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 3811 bool TemplateKeyword, 3812 TemplateDecl *Template) { 3813 // FIXME: Canonicalization? 3814 llvm::FoldingSetNodeID ID; 3815 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 3816 3817 void *InsertPos = 0; 3818 QualifiedTemplateName *QTN = 3819 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3820 if (!QTN) { 3821 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 3822 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 3823 } 3824 3825 return TemplateName(QTN); 3826} 3827 3828/// \brief Retrieve the template name that represents a dependent 3829/// template name such as \c MetaFun::template apply. 3830TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3831 const IdentifierInfo *Name) { 3832 assert((!NNS || NNS->isDependent()) && 3833 "Nested name specifier must be dependent"); 3834 3835 llvm::FoldingSetNodeID ID; 3836 DependentTemplateName::Profile(ID, NNS, Name); 3837 3838 void *InsertPos = 0; 3839 DependentTemplateName *QTN = 3840 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3841 3842 if (QTN) 3843 return TemplateName(QTN); 3844 3845 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3846 if (CanonNNS == NNS) { 3847 QTN = new (*this,4) DependentTemplateName(NNS, Name); 3848 } else { 3849 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 3850 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 3851 DependentTemplateName *CheckQTN = 3852 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3853 assert(!CheckQTN && "Dependent type name canonicalization broken"); 3854 (void)CheckQTN; 3855 } 3856 3857 DependentTemplateNames.InsertNode(QTN, InsertPos); 3858 return TemplateName(QTN); 3859} 3860 3861/// \brief Retrieve the template name that represents a dependent 3862/// template name such as \c MetaFun::template operator+. 3863TemplateName 3864ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3865 OverloadedOperatorKind Operator) { 3866 assert((!NNS || NNS->isDependent()) && 3867 "Nested name specifier must be dependent"); 3868 3869 llvm::FoldingSetNodeID ID; 3870 DependentTemplateName::Profile(ID, NNS, Operator); 3871 3872 void *InsertPos = 0; 3873 DependentTemplateName *QTN 3874 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3875 3876 if (QTN) 3877 return TemplateName(QTN); 3878 3879 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3880 if (CanonNNS == NNS) { 3881 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 3882 } else { 3883 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 3884 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 3885 3886 DependentTemplateName *CheckQTN 3887 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3888 assert(!CheckQTN && "Dependent template name canonicalization broken"); 3889 (void)CheckQTN; 3890 } 3891 3892 DependentTemplateNames.InsertNode(QTN, InsertPos); 3893 return TemplateName(QTN); 3894} 3895 3896/// getFromTargetType - Given one of the integer types provided by 3897/// TargetInfo, produce the corresponding type. The unsigned @p Type 3898/// is actually a value of type @c TargetInfo::IntType. 3899CanQualType ASTContext::getFromTargetType(unsigned Type) const { 3900 switch (Type) { 3901 case TargetInfo::NoInt: return CanQualType(); 3902 case TargetInfo::SignedShort: return ShortTy; 3903 case TargetInfo::UnsignedShort: return UnsignedShortTy; 3904 case TargetInfo::SignedInt: return IntTy; 3905 case TargetInfo::UnsignedInt: return UnsignedIntTy; 3906 case TargetInfo::SignedLong: return LongTy; 3907 case TargetInfo::UnsignedLong: return UnsignedLongTy; 3908 case TargetInfo::SignedLongLong: return LongLongTy; 3909 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 3910 } 3911 3912 assert(false && "Unhandled TargetInfo::IntType value"); 3913 return CanQualType(); 3914} 3915 3916//===----------------------------------------------------------------------===// 3917// Type Predicates. 3918//===----------------------------------------------------------------------===// 3919 3920/// isObjCNSObjectType - Return true if this is an NSObject object using 3921/// NSObject attribute on a c-style pointer type. 3922/// FIXME - Make it work directly on types. 3923/// FIXME: Move to Type. 3924/// 3925bool ASTContext::isObjCNSObjectType(QualType Ty) const { 3926 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 3927 if (TypedefDecl *TD = TDT->getDecl()) 3928 if (TD->getAttr<ObjCNSObjectAttr>()) 3929 return true; 3930 } 3931 return false; 3932} 3933 3934/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 3935/// garbage collection attribute. 3936/// 3937Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 3938 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 3939 if (getLangOptions().ObjC1 && 3940 getLangOptions().getGCMode() != LangOptions::NonGC) { 3941 GCAttrs = Ty.getObjCGCAttr(); 3942 // Default behavious under objective-c's gc is for objective-c pointers 3943 // (or pointers to them) be treated as though they were declared 3944 // as __strong. 3945 if (GCAttrs == Qualifiers::GCNone) { 3946 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 3947 GCAttrs = Qualifiers::Strong; 3948 else if (Ty->isPointerType()) 3949 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 3950 } 3951 // Non-pointers have none gc'able attribute regardless of the attribute 3952 // set on them. 3953 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 3954 return Qualifiers::GCNone; 3955 } 3956 return GCAttrs; 3957} 3958 3959//===----------------------------------------------------------------------===// 3960// Type Compatibility Testing 3961//===----------------------------------------------------------------------===// 3962 3963/// areCompatVectorTypes - Return true if the two specified vector types are 3964/// compatible. 3965static bool areCompatVectorTypes(const VectorType *LHS, 3966 const VectorType *RHS) { 3967 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 3968 return LHS->getElementType() == RHS->getElementType() && 3969 LHS->getNumElements() == RHS->getNumElements(); 3970} 3971 3972//===----------------------------------------------------------------------===// 3973// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 3974//===----------------------------------------------------------------------===// 3975 3976/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 3977/// inheritance hierarchy of 'rProto'. 3978bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 3979 ObjCProtocolDecl *rProto) { 3980 if (lProto == rProto) 3981 return true; 3982 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 3983 E = rProto->protocol_end(); PI != E; ++PI) 3984 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 3985 return true; 3986 return false; 3987} 3988 3989/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 3990/// return true if lhs's protocols conform to rhs's protocol; false 3991/// otherwise. 3992bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 3993 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 3994 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 3995 return false; 3996} 3997 3998/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 3999/// ObjCQualifiedIDType. 4000bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4001 bool compare) { 4002 // Allow id<P..> and an 'id' or void* type in all cases. 4003 if (lhs->isVoidPointerType() || 4004 lhs->isObjCIdType() || lhs->isObjCClassType()) 4005 return true; 4006 else if (rhs->isVoidPointerType() || 4007 rhs->isObjCIdType() || rhs->isObjCClassType()) 4008 return true; 4009 4010 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4011 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4012 4013 if (!rhsOPT) return false; 4014 4015 if (rhsOPT->qual_empty()) { 4016 // If the RHS is a unqualified interface pointer "NSString*", 4017 // make sure we check the class hierarchy. 4018 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4019 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4020 E = lhsQID->qual_end(); I != E; ++I) { 4021 // when comparing an id<P> on lhs with a static type on rhs, 4022 // see if static class implements all of id's protocols, directly or 4023 // through its super class and categories. 4024 if (!rhsID->ClassImplementsProtocol(*I, true)) 4025 return false; 4026 } 4027 } 4028 // If there are no qualifiers and no interface, we have an 'id'. 4029 return true; 4030 } 4031 // Both the right and left sides have qualifiers. 4032 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4033 E = lhsQID->qual_end(); I != E; ++I) { 4034 ObjCProtocolDecl *lhsProto = *I; 4035 bool match = false; 4036 4037 // when comparing an id<P> on lhs with a static type on rhs, 4038 // see if static class implements all of id's protocols, directly or 4039 // through its super class and categories. 4040 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4041 E = rhsOPT->qual_end(); J != E; ++J) { 4042 ObjCProtocolDecl *rhsProto = *J; 4043 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4044 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4045 match = true; 4046 break; 4047 } 4048 } 4049 // If the RHS is a qualified interface pointer "NSString<P>*", 4050 // make sure we check the class hierarchy. 4051 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4052 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4053 E = lhsQID->qual_end(); I != E; ++I) { 4054 // when comparing an id<P> on lhs with a static type on rhs, 4055 // see if static class implements all of id's protocols, directly or 4056 // through its super class and categories. 4057 if (rhsID->ClassImplementsProtocol(*I, true)) { 4058 match = true; 4059 break; 4060 } 4061 } 4062 } 4063 if (!match) 4064 return false; 4065 } 4066 4067 return true; 4068 } 4069 4070 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4071 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4072 4073 if (const ObjCObjectPointerType *lhsOPT = 4074 lhs->getAsObjCInterfacePointerType()) { 4075 if (lhsOPT->qual_empty()) { 4076 bool match = false; 4077 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4078 for (ObjCObjectPointerType::qual_iterator I = rhsQID->qual_begin(), 4079 E = rhsQID->qual_end(); I != E; ++I) { 4080 // when comparing an id<P> on lhs with a static type on rhs, 4081 // see if static class implements all of id's protocols, directly or 4082 // through its super class and categories. 4083 if (lhsID->ClassImplementsProtocol(*I, true)) { 4084 match = true; 4085 break; 4086 } 4087 } 4088 if (!match) 4089 return false; 4090 } 4091 return true; 4092 } 4093 // Both the right and left sides have qualifiers. 4094 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4095 E = lhsOPT->qual_end(); I != E; ++I) { 4096 ObjCProtocolDecl *lhsProto = *I; 4097 bool match = false; 4098 4099 // when comparing an id<P> on lhs with a static type on rhs, 4100 // see if static class implements all of id's protocols, directly or 4101 // through its super class and categories. 4102 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4103 E = rhsQID->qual_end(); J != E; ++J) { 4104 ObjCProtocolDecl *rhsProto = *J; 4105 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4106 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4107 match = true; 4108 break; 4109 } 4110 } 4111 if (!match) 4112 return false; 4113 } 4114 return true; 4115 } 4116 return false; 4117} 4118 4119/// canAssignObjCInterfaces - Return true if the two interface types are 4120/// compatible for assignment from RHS to LHS. This handles validation of any 4121/// protocol qualifiers on the LHS or RHS. 4122/// 4123bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4124 const ObjCObjectPointerType *RHSOPT) { 4125 // If either type represents the built-in 'id' or 'Class' types, return true. 4126 if (LHSOPT->isObjCBuiltinType() || RHSOPT->isObjCBuiltinType()) 4127 return true; 4128 4129 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4130 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4131 QualType(RHSOPT,0), 4132 false); 4133 4134 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4135 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4136 if (LHS && RHS) // We have 2 user-defined types. 4137 return canAssignObjCInterfaces(LHS, RHS); 4138 4139 return false; 4140} 4141 4142/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4143/// for providing type-safty for objective-c pointers used to pass/return 4144/// arguments in block literals. When passed as arguments, passing 'A*' where 4145/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4146/// not OK. For the return type, the opposite is not OK. 4147bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4148 const ObjCObjectPointerType *LHSOPT, 4149 const ObjCObjectPointerType *RHSOPT) { 4150 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4151 return true; 4152 4153 if (LHSOPT->isObjCBuiltinType()) { 4154 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4155 } 4156 4157 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4158 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4159 QualType(RHSOPT,0), 4160 false); 4161 4162 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4163 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4164 if (LHS && RHS) { // We have 2 user-defined types. 4165 if (LHS != RHS) { 4166 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4167 return false; 4168 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4169 return true; 4170 } 4171 else 4172 return true; 4173 } 4174 return false; 4175} 4176 4177/// getIntersectionOfProtocols - This routine finds the intersection of set 4178/// of protocols inherited from two distinct objective-c pointer objects. 4179/// It is used to build composite qualifier list of the composite type of 4180/// the conditional expression involving two objective-c pointer objects. 4181static 4182void getIntersectionOfProtocols(ASTContext &Context, 4183 const ObjCObjectPointerType *LHSOPT, 4184 const ObjCObjectPointerType *RHSOPT, 4185 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4186 4187 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4188 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4189 4190 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4191 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4192 if (LHSNumProtocols > 0) 4193 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4194 else { 4195 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4196 Context.CollectInheritedProtocols(LHS->getDecl(), LHSInheritedProtocols); 4197 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4198 LHSInheritedProtocols.end()); 4199 } 4200 4201 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4202 if (RHSNumProtocols > 0) { 4203 ObjCProtocolDecl **RHSProtocols = 4204 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4205 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4206 if (InheritedProtocolSet.count(RHSProtocols[i])) 4207 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4208 } 4209 else { 4210 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4211 Context.CollectInheritedProtocols(RHS->getDecl(), RHSInheritedProtocols); 4212 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4213 RHSInheritedProtocols.begin(), 4214 E = RHSInheritedProtocols.end(); I != E; ++I) 4215 if (InheritedProtocolSet.count((*I))) 4216 IntersectionOfProtocols.push_back((*I)); 4217 } 4218} 4219 4220/// areCommonBaseCompatible - Returns common base class of the two classes if 4221/// one found. Note that this is O'2 algorithm. But it will be called as the 4222/// last type comparison in a ?-exp of ObjC pointer types before a 4223/// warning is issued. So, its invokation is extremely rare. 4224QualType ASTContext::areCommonBaseCompatible( 4225 const ObjCObjectPointerType *LHSOPT, 4226 const ObjCObjectPointerType *RHSOPT) { 4227 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4228 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4229 if (!LHS || !RHS) 4230 return QualType(); 4231 4232 while (const ObjCInterfaceDecl *LHSIDecl = LHS->getDecl()->getSuperClass()) { 4233 QualType LHSTy = getObjCInterfaceType(LHSIDecl); 4234 LHS = LHSTy->getAs<ObjCInterfaceType>(); 4235 if (canAssignObjCInterfaces(LHS, RHS)) { 4236 llvm::SmallVector<ObjCProtocolDecl *, 8> IntersectionOfProtocols; 4237 getIntersectionOfProtocols(*this, 4238 LHSOPT, RHSOPT, IntersectionOfProtocols); 4239 if (IntersectionOfProtocols.empty()) 4240 LHSTy = getObjCObjectPointerType(LHSTy); 4241 else 4242 LHSTy = getObjCObjectPointerType(LHSTy, &IntersectionOfProtocols[0], 4243 IntersectionOfProtocols.size()); 4244 return LHSTy; 4245 } 4246 } 4247 4248 return QualType(); 4249} 4250 4251bool ASTContext::canAssignObjCInterfaces(const ObjCInterfaceType *LHS, 4252 const ObjCInterfaceType *RHS) { 4253 // Verify that the base decls are compatible: the RHS must be a subclass of 4254 // the LHS. 4255 if (!LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4256 return false; 4257 4258 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4259 // protocol qualified at all, then we are good. 4260 if (LHS->getNumProtocols() == 0) 4261 return true; 4262 4263 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4264 // isn't a superset. 4265 if (RHS->getNumProtocols() == 0) 4266 return true; // FIXME: should return false! 4267 4268 for (ObjCInterfaceType::qual_iterator LHSPI = LHS->qual_begin(), 4269 LHSPE = LHS->qual_end(); 4270 LHSPI != LHSPE; LHSPI++) { 4271 bool RHSImplementsProtocol = false; 4272 4273 // If the RHS doesn't implement the protocol on the left, the types 4274 // are incompatible. 4275 for (ObjCInterfaceType::qual_iterator RHSPI = RHS->qual_begin(), 4276 RHSPE = RHS->qual_end(); 4277 RHSPI != RHSPE; RHSPI++) { 4278 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4279 RHSImplementsProtocol = true; 4280 break; 4281 } 4282 } 4283 // FIXME: For better diagnostics, consider passing back the protocol name. 4284 if (!RHSImplementsProtocol) 4285 return false; 4286 } 4287 // The RHS implements all protocols listed on the LHS. 4288 return true; 4289} 4290 4291bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4292 // get the "pointed to" types 4293 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4294 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4295 4296 if (!LHSOPT || !RHSOPT) 4297 return false; 4298 4299 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4300 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4301} 4302 4303/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4304/// both shall have the identically qualified version of a compatible type. 4305/// C99 6.2.7p1: Two types have compatible types if their types are the 4306/// same. See 6.7.[2,3,5] for additional rules. 4307bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 4308 if (getLangOptions().CPlusPlus) 4309 return hasSameType(LHS, RHS); 4310 4311 return !mergeTypes(LHS, RHS).isNull(); 4312} 4313 4314bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 4315 return !mergeTypes(LHS, RHS, true).isNull(); 4316} 4317 4318QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 4319 bool OfBlockPointer) { 4320 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4321 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4322 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4323 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4324 bool allLTypes = true; 4325 bool allRTypes = true; 4326 4327 // Check return type 4328 QualType retType; 4329 if (OfBlockPointer) 4330 retType = mergeTypes(rbase->getResultType(), lbase->getResultType(), true); 4331 else 4332 retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 4333 if (retType.isNull()) return QualType(); 4334 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 4335 allLTypes = false; 4336 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 4337 allRTypes = false; 4338 // FIXME: double check this 4339 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 4340 // rbase->getRegParmAttr() != 0 && 4341 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 4342 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 4343 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 4344 unsigned RegParm = lbaseInfo.getRegParm() == 0 ? rbaseInfo.getRegParm() : 4345 lbaseInfo.getRegParm(); 4346 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 4347 if (NoReturn != lbaseInfo.getNoReturn() || 4348 RegParm != lbaseInfo.getRegParm()) 4349 allLTypes = false; 4350 if (NoReturn != rbaseInfo.getNoReturn() || 4351 RegParm != rbaseInfo.getRegParm()) 4352 allRTypes = false; 4353 CallingConv lcc = lbaseInfo.getCC(); 4354 CallingConv rcc = rbaseInfo.getCC(); 4355 // Compatible functions must have compatible calling conventions 4356 if (!isSameCallConv(lcc, rcc)) 4357 return QualType(); 4358 4359 if (lproto && rproto) { // two C99 style function prototypes 4360 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4361 "C++ shouldn't be here"); 4362 unsigned lproto_nargs = lproto->getNumArgs(); 4363 unsigned rproto_nargs = rproto->getNumArgs(); 4364 4365 // Compatible functions must have the same number of arguments 4366 if (lproto_nargs != rproto_nargs) 4367 return QualType(); 4368 4369 // Variadic and non-variadic functions aren't compatible 4370 if (lproto->isVariadic() != rproto->isVariadic()) 4371 return QualType(); 4372 4373 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4374 return QualType(); 4375 4376 // Check argument compatibility 4377 llvm::SmallVector<QualType, 10> types; 4378 for (unsigned i = 0; i < lproto_nargs; i++) { 4379 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4380 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4381 QualType argtype = mergeTypes(largtype, rargtype, OfBlockPointer); 4382 if (argtype.isNull()) return QualType(); 4383 types.push_back(argtype); 4384 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4385 allLTypes = false; 4386 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4387 allRTypes = false; 4388 } 4389 if (allLTypes) return lhs; 4390 if (allRTypes) return rhs; 4391 return getFunctionType(retType, types.begin(), types.size(), 4392 lproto->isVariadic(), lproto->getTypeQuals(), 4393 false, false, 0, 0, 4394 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4395 } 4396 4397 if (lproto) allRTypes = false; 4398 if (rproto) allLTypes = false; 4399 4400 const FunctionProtoType *proto = lproto ? lproto : rproto; 4401 if (proto) { 4402 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4403 if (proto->isVariadic()) return QualType(); 4404 // Check that the types are compatible with the types that 4405 // would result from default argument promotions (C99 6.7.5.3p15). 4406 // The only types actually affected are promotable integer 4407 // types and floats, which would be passed as a different 4408 // type depending on whether the prototype is visible. 4409 unsigned proto_nargs = proto->getNumArgs(); 4410 for (unsigned i = 0; i < proto_nargs; ++i) { 4411 QualType argTy = proto->getArgType(i); 4412 4413 // Look at the promotion type of enum types, since that is the type used 4414 // to pass enum values. 4415 if (const EnumType *Enum = argTy->getAs<EnumType>()) 4416 argTy = Enum->getDecl()->getPromotionType(); 4417 4418 if (argTy->isPromotableIntegerType() || 4419 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4420 return QualType(); 4421 } 4422 4423 if (allLTypes) return lhs; 4424 if (allRTypes) return rhs; 4425 return getFunctionType(retType, proto->arg_type_begin(), 4426 proto->getNumArgs(), proto->isVariadic(), 4427 proto->getTypeQuals(), 4428 false, false, 0, 0, 4429 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4430 } 4431 4432 if (allLTypes) return lhs; 4433 if (allRTypes) return rhs; 4434 FunctionType::ExtInfo Info(NoReturn, RegParm, lcc); 4435 return getFunctionNoProtoType(retType, Info); 4436} 4437 4438QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 4439 bool OfBlockPointer) { 4440 // C++ [expr]: If an expression initially has the type "reference to T", the 4441 // type is adjusted to "T" prior to any further analysis, the expression 4442 // designates the object or function denoted by the reference, and the 4443 // expression is an lvalue unless the reference is an rvalue reference and 4444 // the expression is a function call (possibly inside parentheses). 4445 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 4446 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 4447 4448 QualType LHSCan = getCanonicalType(LHS), 4449 RHSCan = getCanonicalType(RHS); 4450 4451 // If two types are identical, they are compatible. 4452 if (LHSCan == RHSCan) 4453 return LHS; 4454 4455 // If the qualifiers are different, the types aren't compatible... mostly. 4456 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4457 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4458 if (LQuals != RQuals) { 4459 // If any of these qualifiers are different, we have a type 4460 // mismatch. 4461 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4462 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4463 return QualType(); 4464 4465 // Exactly one GC qualifier difference is allowed: __strong is 4466 // okay if the other type has no GC qualifier but is an Objective 4467 // C object pointer (i.e. implicitly strong by default). We fix 4468 // this by pretending that the unqualified type was actually 4469 // qualified __strong. 4470 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4471 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4472 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4473 4474 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4475 return QualType(); 4476 4477 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4478 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4479 } 4480 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4481 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4482 } 4483 return QualType(); 4484 } 4485 4486 // Okay, qualifiers are equal. 4487 4488 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4489 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4490 4491 // We want to consider the two function types to be the same for these 4492 // comparisons, just force one to the other. 4493 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 4494 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 4495 4496 // Same as above for arrays 4497 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 4498 LHSClass = Type::ConstantArray; 4499 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 4500 RHSClass = Type::ConstantArray; 4501 4502 // Canonicalize ExtVector -> Vector. 4503 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 4504 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 4505 4506 // If the canonical type classes don't match. 4507 if (LHSClass != RHSClass) { 4508 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 4509 // a signed integer type, or an unsigned integer type. 4510 // Compatibility is based on the underlying type, not the promotion 4511 // type. 4512 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 4513 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 4514 return RHS; 4515 } 4516 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 4517 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 4518 return LHS; 4519 } 4520 4521 return QualType(); 4522 } 4523 4524 // The canonical type classes match. 4525 switch (LHSClass) { 4526#define TYPE(Class, Base) 4527#define ABSTRACT_TYPE(Class, Base) 4528#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 4529#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4530#define DEPENDENT_TYPE(Class, Base) case Type::Class: 4531#include "clang/AST/TypeNodes.def" 4532 assert(false && "Non-canonical and dependent types shouldn't get here"); 4533 return QualType(); 4534 4535 case Type::LValueReference: 4536 case Type::RValueReference: 4537 case Type::MemberPointer: 4538 assert(false && "C++ should never be in mergeTypes"); 4539 return QualType(); 4540 4541 case Type::IncompleteArray: 4542 case Type::VariableArray: 4543 case Type::FunctionProto: 4544 case Type::ExtVector: 4545 assert(false && "Types are eliminated above"); 4546 return QualType(); 4547 4548 case Type::Pointer: 4549 { 4550 // Merge two pointer types, while trying to preserve typedef info 4551 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 4552 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 4553 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 4554 if (ResultType.isNull()) return QualType(); 4555 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4556 return LHS; 4557 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4558 return RHS; 4559 return getPointerType(ResultType); 4560 } 4561 case Type::BlockPointer: 4562 { 4563 // Merge two block pointer types, while trying to preserve typedef info 4564 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 4565 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 4566 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer); 4567 if (ResultType.isNull()) return QualType(); 4568 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4569 return LHS; 4570 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4571 return RHS; 4572 return getBlockPointerType(ResultType); 4573 } 4574 case Type::ConstantArray: 4575 { 4576 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 4577 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 4578 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 4579 return QualType(); 4580 4581 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 4582 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 4583 QualType ResultType = mergeTypes(LHSElem, RHSElem); 4584 if (ResultType.isNull()) return QualType(); 4585 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4586 return LHS; 4587 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4588 return RHS; 4589 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 4590 ArrayType::ArraySizeModifier(), 0); 4591 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 4592 ArrayType::ArraySizeModifier(), 0); 4593 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 4594 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 4595 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4596 return LHS; 4597 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4598 return RHS; 4599 if (LVAT) { 4600 // FIXME: This isn't correct! But tricky to implement because 4601 // the array's size has to be the size of LHS, but the type 4602 // has to be different. 4603 return LHS; 4604 } 4605 if (RVAT) { 4606 // FIXME: This isn't correct! But tricky to implement because 4607 // the array's size has to be the size of RHS, but the type 4608 // has to be different. 4609 return RHS; 4610 } 4611 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 4612 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 4613 return getIncompleteArrayType(ResultType, 4614 ArrayType::ArraySizeModifier(), 0); 4615 } 4616 case Type::FunctionNoProto: 4617 return mergeFunctionTypes(LHS, RHS, OfBlockPointer); 4618 case Type::Record: 4619 case Type::Enum: 4620 return QualType(); 4621 case Type::Builtin: 4622 // Only exactly equal builtin types are compatible, which is tested above. 4623 return QualType(); 4624 case Type::Complex: 4625 // Distinct complex types are incompatible. 4626 return QualType(); 4627 case Type::Vector: 4628 // FIXME: The merged type should be an ExtVector! 4629 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 4630 RHSCan->getAs<VectorType>())) 4631 return LHS; 4632 return QualType(); 4633 case Type::ObjCInterface: { 4634 // Check if the interfaces are assignment compatible. 4635 // FIXME: This should be type compatibility, e.g. whether 4636 // "LHS x; RHS x;" at global scope is legal. 4637 const ObjCInterfaceType* LHSIface = LHS->getAs<ObjCInterfaceType>(); 4638 const ObjCInterfaceType* RHSIface = RHS->getAs<ObjCInterfaceType>(); 4639 if (LHSIface && RHSIface && 4640 canAssignObjCInterfaces(LHSIface, RHSIface)) 4641 return LHS; 4642 4643 return QualType(); 4644 } 4645 case Type::ObjCObjectPointer: { 4646 if (OfBlockPointer) { 4647 if (canAssignObjCInterfacesInBlockPointer( 4648 LHS->getAs<ObjCObjectPointerType>(), 4649 RHS->getAs<ObjCObjectPointerType>())) 4650 return LHS; 4651 return QualType(); 4652 } 4653 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 4654 RHS->getAs<ObjCObjectPointerType>())) 4655 return LHS; 4656 4657 return QualType(); 4658 } 4659 } 4660 4661 return QualType(); 4662} 4663 4664//===----------------------------------------------------------------------===// 4665// Integer Predicates 4666//===----------------------------------------------------------------------===// 4667 4668unsigned ASTContext::getIntWidth(QualType T) { 4669 if (T->isBooleanType()) 4670 return 1; 4671 if (EnumType *ET = dyn_cast<EnumType>(T)) 4672 T = ET->getDecl()->getIntegerType(); 4673 // For builtin types, just use the standard type sizing method 4674 return (unsigned)getTypeSize(T); 4675} 4676 4677QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 4678 assert(T->isSignedIntegerType() && "Unexpected type"); 4679 4680 // Turn <4 x signed int> -> <4 x unsigned int> 4681 if (const VectorType *VTy = T->getAs<VectorType>()) 4682 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 4683 VTy->getNumElements(), VTy->isAltiVec(), VTy->isPixel()); 4684 4685 // For enums, we return the unsigned version of the base type. 4686 if (const EnumType *ETy = T->getAs<EnumType>()) 4687 T = ETy->getDecl()->getIntegerType(); 4688 4689 const BuiltinType *BTy = T->getAs<BuiltinType>(); 4690 assert(BTy && "Unexpected signed integer type"); 4691 switch (BTy->getKind()) { 4692 case BuiltinType::Char_S: 4693 case BuiltinType::SChar: 4694 return UnsignedCharTy; 4695 case BuiltinType::Short: 4696 return UnsignedShortTy; 4697 case BuiltinType::Int: 4698 return UnsignedIntTy; 4699 case BuiltinType::Long: 4700 return UnsignedLongTy; 4701 case BuiltinType::LongLong: 4702 return UnsignedLongLongTy; 4703 case BuiltinType::Int128: 4704 return UnsignedInt128Ty; 4705 default: 4706 assert(0 && "Unexpected signed integer type"); 4707 return QualType(); 4708 } 4709} 4710 4711ExternalASTSource::~ExternalASTSource() { } 4712 4713void ExternalASTSource::PrintStats() { } 4714 4715 4716//===----------------------------------------------------------------------===// 4717// Builtin Type Computation 4718//===----------------------------------------------------------------------===// 4719 4720/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 4721/// pointer over the consumed characters. This returns the resultant type. 4722static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 4723 ASTContext::GetBuiltinTypeError &Error, 4724 bool AllowTypeModifiers = true) { 4725 // Modifiers. 4726 int HowLong = 0; 4727 bool Signed = false, Unsigned = false; 4728 4729 // Read the modifiers first. 4730 bool Done = false; 4731 while (!Done) { 4732 switch (*Str++) { 4733 default: Done = true; --Str; break; 4734 case 'S': 4735 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 4736 assert(!Signed && "Can't use 'S' modifier multiple times!"); 4737 Signed = true; 4738 break; 4739 case 'U': 4740 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 4741 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 4742 Unsigned = true; 4743 break; 4744 case 'L': 4745 assert(HowLong <= 2 && "Can't have LLLL modifier"); 4746 ++HowLong; 4747 break; 4748 } 4749 } 4750 4751 QualType Type; 4752 4753 // Read the base type. 4754 switch (*Str++) { 4755 default: assert(0 && "Unknown builtin type letter!"); 4756 case 'v': 4757 assert(HowLong == 0 && !Signed && !Unsigned && 4758 "Bad modifiers used with 'v'!"); 4759 Type = Context.VoidTy; 4760 break; 4761 case 'f': 4762 assert(HowLong == 0 && !Signed && !Unsigned && 4763 "Bad modifiers used with 'f'!"); 4764 Type = Context.FloatTy; 4765 break; 4766 case 'd': 4767 assert(HowLong < 2 && !Signed && !Unsigned && 4768 "Bad modifiers used with 'd'!"); 4769 if (HowLong) 4770 Type = Context.LongDoubleTy; 4771 else 4772 Type = Context.DoubleTy; 4773 break; 4774 case 's': 4775 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 4776 if (Unsigned) 4777 Type = Context.UnsignedShortTy; 4778 else 4779 Type = Context.ShortTy; 4780 break; 4781 case 'i': 4782 if (HowLong == 3) 4783 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 4784 else if (HowLong == 2) 4785 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 4786 else if (HowLong == 1) 4787 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 4788 else 4789 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 4790 break; 4791 case 'c': 4792 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 4793 if (Signed) 4794 Type = Context.SignedCharTy; 4795 else if (Unsigned) 4796 Type = Context.UnsignedCharTy; 4797 else 4798 Type = Context.CharTy; 4799 break; 4800 case 'b': // boolean 4801 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 4802 Type = Context.BoolTy; 4803 break; 4804 case 'z': // size_t. 4805 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 4806 Type = Context.getSizeType(); 4807 break; 4808 case 'F': 4809 Type = Context.getCFConstantStringType(); 4810 break; 4811 case 'a': 4812 Type = Context.getBuiltinVaListType(); 4813 assert(!Type.isNull() && "builtin va list type not initialized!"); 4814 break; 4815 case 'A': 4816 // This is a "reference" to a va_list; however, what exactly 4817 // this means depends on how va_list is defined. There are two 4818 // different kinds of va_list: ones passed by value, and ones 4819 // passed by reference. An example of a by-value va_list is 4820 // x86, where va_list is a char*. An example of by-ref va_list 4821 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 4822 // we want this argument to be a char*&; for x86-64, we want 4823 // it to be a __va_list_tag*. 4824 Type = Context.getBuiltinVaListType(); 4825 assert(!Type.isNull() && "builtin va list type not initialized!"); 4826 if (Type->isArrayType()) { 4827 Type = Context.getArrayDecayedType(Type); 4828 } else { 4829 Type = Context.getLValueReferenceType(Type); 4830 } 4831 break; 4832 case 'V': { 4833 char *End; 4834 unsigned NumElements = strtoul(Str, &End, 10); 4835 assert(End != Str && "Missing vector size"); 4836 4837 Str = End; 4838 4839 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4840 // FIXME: Don't know what to do about AltiVec. 4841 Type = Context.getVectorType(ElementType, NumElements, false, false); 4842 break; 4843 } 4844 case 'X': { 4845 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4846 Type = Context.getComplexType(ElementType); 4847 break; 4848 } 4849 case 'P': 4850 Type = Context.getFILEType(); 4851 if (Type.isNull()) { 4852 Error = ASTContext::GE_Missing_stdio; 4853 return QualType(); 4854 } 4855 break; 4856 case 'J': 4857 if (Signed) 4858 Type = Context.getsigjmp_bufType(); 4859 else 4860 Type = Context.getjmp_bufType(); 4861 4862 if (Type.isNull()) { 4863 Error = ASTContext::GE_Missing_setjmp; 4864 return QualType(); 4865 } 4866 break; 4867 } 4868 4869 if (!AllowTypeModifiers) 4870 return Type; 4871 4872 Done = false; 4873 while (!Done) { 4874 switch (char c = *Str++) { 4875 default: Done = true; --Str; break; 4876 case '*': 4877 case '&': 4878 { 4879 // Both pointers and references can have their pointee types 4880 // qualified with an address space. 4881 char *End; 4882 unsigned AddrSpace = strtoul(Str, &End, 10); 4883 if (End != Str && AddrSpace != 0) { 4884 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 4885 Str = End; 4886 } 4887 } 4888 if (c == '*') 4889 Type = Context.getPointerType(Type); 4890 else 4891 Type = Context.getLValueReferenceType(Type); 4892 break; 4893 // FIXME: There's no way to have a built-in with an rvalue ref arg. 4894 case 'C': 4895 Type = Type.withConst(); 4896 break; 4897 case 'D': 4898 Type = Context.getVolatileType(Type); 4899 break; 4900 } 4901 } 4902 4903 return Type; 4904} 4905 4906/// GetBuiltinType - Return the type for the specified builtin. 4907QualType ASTContext::GetBuiltinType(unsigned id, 4908 GetBuiltinTypeError &Error) { 4909 const char *TypeStr = BuiltinInfo.GetTypeString(id); 4910 4911 llvm::SmallVector<QualType, 8> ArgTypes; 4912 4913 Error = GE_None; 4914 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 4915 if (Error != GE_None) 4916 return QualType(); 4917 while (TypeStr[0] && TypeStr[0] != '.') { 4918 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 4919 if (Error != GE_None) 4920 return QualType(); 4921 4922 // Do array -> pointer decay. The builtin should use the decayed type. 4923 if (Ty->isArrayType()) 4924 Ty = getArrayDecayedType(Ty); 4925 4926 ArgTypes.push_back(Ty); 4927 } 4928 4929 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 4930 "'.' should only occur at end of builtin type list!"); 4931 4932 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 4933 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 4934 return getFunctionNoProtoType(ResType); 4935 4936 // FIXME: Should we create noreturn types? 4937 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 4938 TypeStr[0] == '.', 0, false, false, 0, 0, 4939 FunctionType::ExtInfo()); 4940} 4941 4942QualType 4943ASTContext::UsualArithmeticConversionsType(QualType lhs, QualType rhs) { 4944 // Perform the usual unary conversions. We do this early so that 4945 // integral promotions to "int" can allow us to exit early, in the 4946 // lhs == rhs check. Also, for conversion purposes, we ignore any 4947 // qualifiers. For example, "const float" and "float" are 4948 // equivalent. 4949 if (lhs->isPromotableIntegerType()) 4950 lhs = getPromotedIntegerType(lhs); 4951 else 4952 lhs = lhs.getUnqualifiedType(); 4953 if (rhs->isPromotableIntegerType()) 4954 rhs = getPromotedIntegerType(rhs); 4955 else 4956 rhs = rhs.getUnqualifiedType(); 4957 4958 // If both types are identical, no conversion is needed. 4959 if (lhs == rhs) 4960 return lhs; 4961 4962 // If either side is a non-arithmetic type (e.g. a pointer), we are done. 4963 // The caller can deal with this (e.g. pointer + int). 4964 if (!lhs->isArithmeticType() || !rhs->isArithmeticType()) 4965 return lhs; 4966 4967 // At this point, we have two different arithmetic types. 4968 4969 // Handle complex types first (C99 6.3.1.8p1). 4970 if (lhs->isComplexType() || rhs->isComplexType()) { 4971 // if we have an integer operand, the result is the complex type. 4972 if (rhs->isIntegerType() || rhs->isComplexIntegerType()) { 4973 // convert the rhs to the lhs complex type. 4974 return lhs; 4975 } 4976 if (lhs->isIntegerType() || lhs->isComplexIntegerType()) { 4977 // convert the lhs to the rhs complex type. 4978 return rhs; 4979 } 4980 // This handles complex/complex, complex/float, or float/complex. 4981 // When both operands are complex, the shorter operand is converted to the 4982 // type of the longer, and that is the type of the result. This corresponds 4983 // to what is done when combining two real floating-point operands. 4984 // The fun begins when size promotion occur across type domains. 4985 // From H&S 6.3.4: When one operand is complex and the other is a real 4986 // floating-point type, the less precise type is converted, within it's 4987 // real or complex domain, to the precision of the other type. For example, 4988 // when combining a "long double" with a "double _Complex", the 4989 // "double _Complex" is promoted to "long double _Complex". 4990 int result = getFloatingTypeOrder(lhs, rhs); 4991 4992 if (result > 0) { // The left side is bigger, convert rhs. 4993 rhs = getFloatingTypeOfSizeWithinDomain(lhs, rhs); 4994 } else if (result < 0) { // The right side is bigger, convert lhs. 4995 lhs = getFloatingTypeOfSizeWithinDomain(rhs, lhs); 4996 } 4997 // At this point, lhs and rhs have the same rank/size. Now, make sure the 4998 // domains match. This is a requirement for our implementation, C99 4999 // does not require this promotion. 5000 if (lhs != rhs) { // Domains don't match, we have complex/float mix. 5001 if (lhs->isRealFloatingType()) { // handle "double, _Complex double". 5002 return rhs; 5003 } else { // handle "_Complex double, double". 5004 return lhs; 5005 } 5006 } 5007 return lhs; // The domain/size match exactly. 5008 } 5009 // Now handle "real" floating types (i.e. float, double, long double). 5010 if (lhs->isRealFloatingType() || rhs->isRealFloatingType()) { 5011 // if we have an integer operand, the result is the real floating type. 5012 if (rhs->isIntegerType()) { 5013 // convert rhs to the lhs floating point type. 5014 return lhs; 5015 } 5016 if (rhs->isComplexIntegerType()) { 5017 // convert rhs to the complex floating point type. 5018 return getComplexType(lhs); 5019 } 5020 if (lhs->isIntegerType()) { 5021 // convert lhs to the rhs floating point type. 5022 return rhs; 5023 } 5024 if (lhs->isComplexIntegerType()) { 5025 // convert lhs to the complex floating point type. 5026 return getComplexType(rhs); 5027 } 5028 // We have two real floating types, float/complex combos were handled above. 5029 // Convert the smaller operand to the bigger result. 5030 int result = getFloatingTypeOrder(lhs, rhs); 5031 if (result > 0) // convert the rhs 5032 return lhs; 5033 assert(result < 0 && "illegal float comparison"); 5034 return rhs; // convert the lhs 5035 } 5036 if (lhs->isComplexIntegerType() || rhs->isComplexIntegerType()) { 5037 // Handle GCC complex int extension. 5038 const ComplexType *lhsComplexInt = lhs->getAsComplexIntegerType(); 5039 const ComplexType *rhsComplexInt = rhs->getAsComplexIntegerType(); 5040 5041 if (lhsComplexInt && rhsComplexInt) { 5042 if (getIntegerTypeOrder(lhsComplexInt->getElementType(), 5043 rhsComplexInt->getElementType()) >= 0) 5044 return lhs; // convert the rhs 5045 return rhs; 5046 } else if (lhsComplexInt && rhs->isIntegerType()) { 5047 // convert the rhs to the lhs complex type. 5048 return lhs; 5049 } else if (rhsComplexInt && lhs->isIntegerType()) { 5050 // convert the lhs to the rhs complex type. 5051 return rhs; 5052 } 5053 } 5054 // Finally, we have two differing integer types. 5055 // The rules for this case are in C99 6.3.1.8 5056 int compare = getIntegerTypeOrder(lhs, rhs); 5057 bool lhsSigned = lhs->isSignedIntegerType(), 5058 rhsSigned = rhs->isSignedIntegerType(); 5059 QualType destType; 5060 if (lhsSigned == rhsSigned) { 5061 // Same signedness; use the higher-ranked type 5062 destType = compare >= 0 ? lhs : rhs; 5063 } else if (compare != (lhsSigned ? 1 : -1)) { 5064 // The unsigned type has greater than or equal rank to the 5065 // signed type, so use the unsigned type 5066 destType = lhsSigned ? rhs : lhs; 5067 } else if (getIntWidth(lhs) != getIntWidth(rhs)) { 5068 // The two types are different widths; if we are here, that 5069 // means the signed type is larger than the unsigned type, so 5070 // use the signed type. 5071 destType = lhsSigned ? lhs : rhs; 5072 } else { 5073 // The signed type is higher-ranked than the unsigned type, 5074 // but isn't actually any bigger (like unsigned int and long 5075 // on most 32-bit systems). Use the unsigned type corresponding 5076 // to the signed type. 5077 destType = getCorrespondingUnsignedType(lhsSigned ? lhs : rhs); 5078 } 5079 return destType; 5080} 5081