ASTContext.cpp revision 8eefcd353c1d06a10104f69e5079ebab3183f9a3
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 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 45 sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 46 SourceMgr(SM), LangOpts(LOpts), FreeMemory(FreeMem), Target(t), 47 Idents(idents), Selectors(sels), 48 BuiltinInfo(builtins), ExternalSource(0), PrintingPolicy(LOpts), 49 LastSDM(0, 0) { 50 ObjCIdRedefinitionType = QualType(); 51 ObjCClassRedefinitionType = QualType(); 52 ObjCSelRedefinitionType = QualType(); 53 if (size_reserve > 0) Types.reserve(size_reserve); 54 TUDecl = TranslationUnitDecl::Create(*this); 55 InitBuiltinTypes(); 56} 57 58ASTContext::~ASTContext() { 59 // Release the DenseMaps associated with DeclContext objects. 60 // FIXME: Is this the ideal solution? 61 ReleaseDeclContextMaps(); 62 63 // Release all of the memory associated with overridden C++ methods. 64 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 65 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 66 OM != OMEnd; ++OM) 67 OM->second.Destroy(); 68 69 if (FreeMemory) { 70 // Deallocate all the types. 71 while (!Types.empty()) { 72 Types.back()->Destroy(*this); 73 Types.pop_back(); 74 } 75 76 for (llvm::FoldingSet<ExtQuals>::iterator 77 I = ExtQualNodes.begin(), E = ExtQualNodes.end(); I != E; ) { 78 // Increment in loop to prevent using deallocated memory. 79 Deallocate(&*I++); 80 } 81 82 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 83 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 84 // Increment in loop to prevent using deallocated memory. 85 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 86 R->Destroy(*this); 87 } 88 89 for (llvm::DenseMap<const ObjCContainerDecl*, 90 const ASTRecordLayout*>::iterator 91 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) { 92 // Increment in loop to prevent using deallocated memory. 93 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 94 R->Destroy(*this); 95 } 96 } 97 98 // Destroy nested-name-specifiers. 99 for (llvm::FoldingSet<NestedNameSpecifier>::iterator 100 NNS = NestedNameSpecifiers.begin(), 101 NNSEnd = NestedNameSpecifiers.end(); 102 NNS != NNSEnd; ) { 103 // Increment in loop to prevent using deallocated memory. 104 (*NNS++).Destroy(*this); 105 } 106 107 if (GlobalNestedNameSpecifier) 108 GlobalNestedNameSpecifier->Destroy(*this); 109 110 TUDecl->Destroy(*this); 111} 112 113void 114ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 115 ExternalSource.reset(Source.take()); 116} 117 118void ASTContext::PrintStats() const { 119 fprintf(stderr, "*** AST Context Stats:\n"); 120 fprintf(stderr, " %d types total.\n", (int)Types.size()); 121 122 unsigned counts[] = { 123#define TYPE(Name, Parent) 0, 124#define ABSTRACT_TYPE(Name, Parent) 125#include "clang/AST/TypeNodes.def" 126 0 // Extra 127 }; 128 129 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 130 Type *T = Types[i]; 131 counts[(unsigned)T->getTypeClass()]++; 132 } 133 134 unsigned Idx = 0; 135 unsigned TotalBytes = 0; 136#define TYPE(Name, Parent) \ 137 if (counts[Idx]) \ 138 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 139 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 140 ++Idx; 141#define ABSTRACT_TYPE(Name, Parent) 142#include "clang/AST/TypeNodes.def" 143 144 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 145 146 if (ExternalSource.get()) { 147 fprintf(stderr, "\n"); 148 ExternalSource->PrintStats(); 149 } 150} 151 152 153void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 154 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 155 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 156 Types.push_back(Ty); 157} 158 159void ASTContext::InitBuiltinTypes() { 160 assert(VoidTy.isNull() && "Context reinitialized?"); 161 162 // C99 6.2.5p19. 163 InitBuiltinType(VoidTy, BuiltinType::Void); 164 165 // C99 6.2.5p2. 166 InitBuiltinType(BoolTy, BuiltinType::Bool); 167 // C99 6.2.5p3. 168 if (LangOpts.CharIsSigned) 169 InitBuiltinType(CharTy, BuiltinType::Char_S); 170 else 171 InitBuiltinType(CharTy, BuiltinType::Char_U); 172 // C99 6.2.5p4. 173 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 174 InitBuiltinType(ShortTy, BuiltinType::Short); 175 InitBuiltinType(IntTy, BuiltinType::Int); 176 InitBuiltinType(LongTy, BuiltinType::Long); 177 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 178 179 // C99 6.2.5p6. 180 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 181 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 182 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 183 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 184 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 185 186 // C99 6.2.5p10. 187 InitBuiltinType(FloatTy, BuiltinType::Float); 188 InitBuiltinType(DoubleTy, BuiltinType::Double); 189 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 190 191 // GNU extension, 128-bit integers. 192 InitBuiltinType(Int128Ty, BuiltinType::Int128); 193 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 194 195 if (LangOpts.CPlusPlus) // C++ 3.9.1p5 196 InitBuiltinType(WCharTy, BuiltinType::WChar); 197 else // C99 198 WCharTy = getFromTargetType(Target.getWCharType()); 199 200 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 201 InitBuiltinType(Char16Ty, BuiltinType::Char16); 202 else // C99 203 Char16Ty = getFromTargetType(Target.getChar16Type()); 204 205 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 206 InitBuiltinType(Char32Ty, BuiltinType::Char32); 207 else // C99 208 Char32Ty = getFromTargetType(Target.getChar32Type()); 209 210 // Placeholder type for functions. 211 InitBuiltinType(OverloadTy, BuiltinType::Overload); 212 213 // Placeholder type for type-dependent expressions whose type is 214 // completely unknown. No code should ever check a type against 215 // DependentTy and users should never see it; however, it is here to 216 // help diagnose failures to properly check for type-dependent 217 // expressions. 218 InitBuiltinType(DependentTy, BuiltinType::Dependent); 219 220 // Placeholder type for C++0x auto declarations whose real type has 221 // not yet been deduced. 222 InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 223 224 // C99 6.2.5p11. 225 FloatComplexTy = getComplexType(FloatTy); 226 DoubleComplexTy = getComplexType(DoubleTy); 227 LongDoubleComplexTy = getComplexType(LongDoubleTy); 228 229 BuiltinVaListType = QualType(); 230 231 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 232 ObjCIdTypedefType = QualType(); 233 ObjCClassTypedefType = QualType(); 234 ObjCSelTypedefType = QualType(); 235 236 // Builtin types for 'id', 'Class', and 'SEL'. 237 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 238 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 239 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 240 241 ObjCConstantStringType = QualType(); 242 243 // void * type 244 VoidPtrTy = getPointerType(VoidTy); 245 246 // nullptr type (C++0x 2.14.7) 247 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 248} 249 250MemberSpecializationInfo * 251ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 252 assert(Var->isStaticDataMember() && "Not a static data member"); 253 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 254 = InstantiatedFromStaticDataMember.find(Var); 255 if (Pos == InstantiatedFromStaticDataMember.end()) 256 return 0; 257 258 return Pos->second; 259} 260 261void 262ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 263 TemplateSpecializationKind TSK) { 264 assert(Inst->isStaticDataMember() && "Not a static data member"); 265 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 266 assert(!InstantiatedFromStaticDataMember[Inst] && 267 "Already noted what static data member was instantiated from"); 268 InstantiatedFromStaticDataMember[Inst] 269 = new (*this) MemberSpecializationInfo(Tmpl, TSK); 270} 271 272NamedDecl * 273ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 274 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 275 = InstantiatedFromUsingDecl.find(UUD); 276 if (Pos == InstantiatedFromUsingDecl.end()) 277 return 0; 278 279 return Pos->second; 280} 281 282void 283ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 284 assert((isa<UsingDecl>(Pattern) || 285 isa<UnresolvedUsingValueDecl>(Pattern) || 286 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 287 "pattern decl is not a using decl"); 288 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 289 InstantiatedFromUsingDecl[Inst] = Pattern; 290} 291 292UsingShadowDecl * 293ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 294 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 295 = InstantiatedFromUsingShadowDecl.find(Inst); 296 if (Pos == InstantiatedFromUsingShadowDecl.end()) 297 return 0; 298 299 return Pos->second; 300} 301 302void 303ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 304 UsingShadowDecl *Pattern) { 305 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 306 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 307} 308 309FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 310 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 311 = InstantiatedFromUnnamedFieldDecl.find(Field); 312 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 313 return 0; 314 315 return Pos->second; 316} 317 318void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 319 FieldDecl *Tmpl) { 320 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 321 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 322 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 323 "Already noted what unnamed field was instantiated from"); 324 325 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 326} 327 328CXXMethodVector::iterator CXXMethodVector::begin() const { 329 if ((Storage & 0x01) == 0) 330 return reinterpret_cast<iterator>(&Storage); 331 332 vector_type *Vec = reinterpret_cast<vector_type *>(Storage & ~0x01); 333 return &Vec->front(); 334} 335 336CXXMethodVector::iterator CXXMethodVector::end() const { 337 if ((Storage & 0x01) == 0) { 338 if (Storage == 0) 339 return reinterpret_cast<iterator>(&Storage); 340 341 return reinterpret_cast<iterator>(&Storage) + 1; 342 } 343 344 vector_type *Vec = reinterpret_cast<vector_type *>(Storage & ~0x01); 345 return &Vec->front() + Vec->size(); 346} 347 348void CXXMethodVector::push_back(const CXXMethodDecl *Method) { 349 if (Storage == 0) { 350 // 0 -> 1 element. 351 Storage = reinterpret_cast<uintptr_t>(Method); 352 return; 353 } 354 355 vector_type *Vec; 356 if ((Storage & 0x01) == 0) { 357 // 1 -> 2 elements. Allocate a new vector and push the element into that 358 // vector. 359 Vec = new vector_type; 360 Vec->push_back(reinterpret_cast<const CXXMethodDecl *>(Storage)); 361 Storage = reinterpret_cast<uintptr_t>(Vec) | 0x01; 362 } else 363 Vec = reinterpret_cast<vector_type *>(Storage & ~0x01); 364 365 // Add the new method to the vector. 366 Vec->push_back(Method); 367} 368 369void CXXMethodVector::Destroy() { 370 if (Storage & 0x01) 371 delete reinterpret_cast<vector_type *>(Storage & ~0x01); 372 373 Storage = 0; 374} 375 376 377ASTContext::overridden_cxx_method_iterator 378ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 379 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 380 = OverriddenMethods.find(Method); 381 if (Pos == OverriddenMethods.end()) 382 return 0; 383 384 return Pos->second.begin(); 385} 386 387ASTContext::overridden_cxx_method_iterator 388ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 389 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 390 = OverriddenMethods.find(Method); 391 if (Pos == OverriddenMethods.end()) 392 return 0; 393 394 return Pos->second.end(); 395} 396 397void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 398 const CXXMethodDecl *Overridden) { 399 OverriddenMethods[Method].push_back(Overridden); 400} 401 402namespace { 403 class BeforeInTranslationUnit 404 : std::binary_function<SourceRange, SourceRange, bool> { 405 SourceManager *SourceMgr; 406 407 public: 408 explicit BeforeInTranslationUnit(SourceManager *SM) : SourceMgr(SM) { } 409 410 bool operator()(SourceRange X, SourceRange Y) { 411 return SourceMgr->isBeforeInTranslationUnit(X.getBegin(), Y.getBegin()); 412 } 413 }; 414} 415 416//===----------------------------------------------------------------------===// 417// Type Sizing and Analysis 418//===----------------------------------------------------------------------===// 419 420/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 421/// scalar floating point type. 422const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 423 const BuiltinType *BT = T->getAs<BuiltinType>(); 424 assert(BT && "Not a floating point type!"); 425 switch (BT->getKind()) { 426 default: assert(0 && "Not a floating point type!"); 427 case BuiltinType::Float: return Target.getFloatFormat(); 428 case BuiltinType::Double: return Target.getDoubleFormat(); 429 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 430 } 431} 432 433/// getDeclAlign - Return a conservative estimate of the alignment of the 434/// specified decl. Note that bitfields do not have a valid alignment, so 435/// this method will assert on them. 436/// If @p RefAsPointee, references are treated like their underlying type 437/// (for alignof), else they're treated like pointers (for CodeGen). 438CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) { 439 unsigned Align = Target.getCharWidth(); 440 441 if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 442 Align = std::max(Align, AA->getMaxAlignment()); 443 444 if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 445 QualType T = VD->getType(); 446 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 447 if (RefAsPointee) 448 T = RT->getPointeeType(); 449 else 450 T = getPointerType(RT->getPointeeType()); 451 } 452 if (!T->isIncompleteType() && !T->isFunctionType()) { 453 // Incomplete or function types default to 1. 454 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 455 T = cast<ArrayType>(T)->getElementType(); 456 457 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 458 } 459 if (const FieldDecl *FD = dyn_cast<FieldDecl>(VD)) { 460 // In the case of a field in a packed struct, we want the minimum 461 // of the alignment of the field and the alignment of the struct. 462 Align = std::min(Align, 463 getPreferredTypeAlign(FD->getParent()->getTypeForDecl())); 464 } 465 } 466 467 return CharUnits::fromQuantity(Align / Target.getCharWidth()); 468} 469 470/// getTypeSize - Return the size of the specified type, in bits. This method 471/// does not work on incomplete types. 472/// 473/// FIXME: Pointers into different addr spaces could have different sizes and 474/// alignment requirements: getPointerInfo should take an AddrSpace, this 475/// should take a QualType, &c. 476std::pair<uint64_t, unsigned> 477ASTContext::getTypeInfo(const Type *T) { 478 uint64_t Width=0; 479 unsigned Align=8; 480 switch (T->getTypeClass()) { 481#define TYPE(Class, Base) 482#define ABSTRACT_TYPE(Class, Base) 483#define NON_CANONICAL_TYPE(Class, Base) 484#define DEPENDENT_TYPE(Class, Base) case Type::Class: 485#include "clang/AST/TypeNodes.def" 486 assert(false && "Should not see dependent types"); 487 break; 488 489 case Type::FunctionNoProto: 490 case Type::FunctionProto: 491 // GCC extension: alignof(function) = 32 bits 492 Width = 0; 493 Align = 32; 494 break; 495 496 case Type::IncompleteArray: 497 case Type::VariableArray: 498 Width = 0; 499 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 500 break; 501 502 case Type::ConstantArray: { 503 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 504 505 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 506 Width = EltInfo.first*CAT->getSize().getZExtValue(); 507 Align = EltInfo.second; 508 break; 509 } 510 case Type::ExtVector: 511 case Type::Vector: { 512 const VectorType *VT = cast<VectorType>(T); 513 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 514 Width = EltInfo.first*VT->getNumElements(); 515 Align = Width; 516 // If the alignment is not a power of 2, round up to the next power of 2. 517 // This happens for non-power-of-2 length vectors. 518 if (Align & (Align-1)) { 519 Align = llvm::NextPowerOf2(Align); 520 Width = llvm::RoundUpToAlignment(Width, Align); 521 } 522 break; 523 } 524 525 case Type::Builtin: 526 switch (cast<BuiltinType>(T)->getKind()) { 527 default: assert(0 && "Unknown builtin type!"); 528 case BuiltinType::Void: 529 // GCC extension: alignof(void) = 8 bits. 530 Width = 0; 531 Align = 8; 532 break; 533 534 case BuiltinType::Bool: 535 Width = Target.getBoolWidth(); 536 Align = Target.getBoolAlign(); 537 break; 538 case BuiltinType::Char_S: 539 case BuiltinType::Char_U: 540 case BuiltinType::UChar: 541 case BuiltinType::SChar: 542 Width = Target.getCharWidth(); 543 Align = Target.getCharAlign(); 544 break; 545 case BuiltinType::WChar: 546 Width = Target.getWCharWidth(); 547 Align = Target.getWCharAlign(); 548 break; 549 case BuiltinType::Char16: 550 Width = Target.getChar16Width(); 551 Align = Target.getChar16Align(); 552 break; 553 case BuiltinType::Char32: 554 Width = Target.getChar32Width(); 555 Align = Target.getChar32Align(); 556 break; 557 case BuiltinType::UShort: 558 case BuiltinType::Short: 559 Width = Target.getShortWidth(); 560 Align = Target.getShortAlign(); 561 break; 562 case BuiltinType::UInt: 563 case BuiltinType::Int: 564 Width = Target.getIntWidth(); 565 Align = Target.getIntAlign(); 566 break; 567 case BuiltinType::ULong: 568 case BuiltinType::Long: 569 Width = Target.getLongWidth(); 570 Align = Target.getLongAlign(); 571 break; 572 case BuiltinType::ULongLong: 573 case BuiltinType::LongLong: 574 Width = Target.getLongLongWidth(); 575 Align = Target.getLongLongAlign(); 576 break; 577 case BuiltinType::Int128: 578 case BuiltinType::UInt128: 579 Width = 128; 580 Align = 128; // int128_t is 128-bit aligned on all targets. 581 break; 582 case BuiltinType::Float: 583 Width = Target.getFloatWidth(); 584 Align = Target.getFloatAlign(); 585 break; 586 case BuiltinType::Double: 587 Width = Target.getDoubleWidth(); 588 Align = Target.getDoubleAlign(); 589 break; 590 case BuiltinType::LongDouble: 591 Width = Target.getLongDoubleWidth(); 592 Align = Target.getLongDoubleAlign(); 593 break; 594 case BuiltinType::NullPtr: 595 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 596 Align = Target.getPointerAlign(0); // == sizeof(void*) 597 break; 598 } 599 break; 600 case Type::ObjCObjectPointer: 601 Width = Target.getPointerWidth(0); 602 Align = Target.getPointerAlign(0); 603 break; 604 case Type::BlockPointer: { 605 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 606 Width = Target.getPointerWidth(AS); 607 Align = Target.getPointerAlign(AS); 608 break; 609 } 610 case Type::LValueReference: 611 case Type::RValueReference: { 612 // alignof and sizeof should never enter this code path here, so we go 613 // the pointer route. 614 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 615 Width = Target.getPointerWidth(AS); 616 Align = Target.getPointerAlign(AS); 617 break; 618 } 619 case Type::Pointer: { 620 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 621 Width = Target.getPointerWidth(AS); 622 Align = Target.getPointerAlign(AS); 623 break; 624 } 625 case Type::MemberPointer: { 626 QualType Pointee = cast<MemberPointerType>(T)->getPointeeType(); 627 std::pair<uint64_t, unsigned> PtrDiffInfo = 628 getTypeInfo(getPointerDiffType()); 629 Width = PtrDiffInfo.first; 630 if (Pointee->isFunctionType()) 631 Width *= 2; 632 Align = PtrDiffInfo.second; 633 break; 634 } 635 case Type::Complex: { 636 // Complex types have the same alignment as their elements, but twice the 637 // size. 638 std::pair<uint64_t, unsigned> EltInfo = 639 getTypeInfo(cast<ComplexType>(T)->getElementType()); 640 Width = EltInfo.first*2; 641 Align = EltInfo.second; 642 break; 643 } 644 case Type::ObjCInterface: { 645 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 646 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 647 Width = Layout.getSize(); 648 Align = Layout.getAlignment(); 649 break; 650 } 651 case Type::Record: 652 case Type::Enum: { 653 const TagType *TT = cast<TagType>(T); 654 655 if (TT->getDecl()->isInvalidDecl()) { 656 Width = 1; 657 Align = 1; 658 break; 659 } 660 661 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 662 return getTypeInfo(ET->getDecl()->getIntegerType()); 663 664 const RecordType *RT = cast<RecordType>(TT); 665 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 666 Width = Layout.getSize(); 667 Align = Layout.getAlignment(); 668 break; 669 } 670 671 case Type::SubstTemplateTypeParm: 672 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 673 getReplacementType().getTypePtr()); 674 675 case Type::Elaborated: 676 return getTypeInfo(cast<ElaboratedType>(T)->getUnderlyingType() 677 .getTypePtr()); 678 679 case Type::Typedef: { 680 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 681 if (const AlignedAttr *Aligned = Typedef->getAttr<AlignedAttr>()) { 682 Align = std::max(Aligned->getMaxAlignment(), 683 getTypeAlign(Typedef->getUnderlyingType().getTypePtr())); 684 Width = getTypeSize(Typedef->getUnderlyingType().getTypePtr()); 685 } else 686 return getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 687 break; 688 } 689 690 case Type::TypeOfExpr: 691 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 692 .getTypePtr()); 693 694 case Type::TypeOf: 695 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 696 697 case Type::Decltype: 698 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 699 .getTypePtr()); 700 701 case Type::QualifiedName: 702 return getTypeInfo(cast<QualifiedNameType>(T)->getNamedType().getTypePtr()); 703 704 case Type::InjectedClassName: 705 return getTypeInfo(cast<InjectedClassNameType>(T) 706 ->getUnderlyingType().getTypePtr()); 707 708 case Type::TemplateSpecialization: 709 assert(getCanonicalType(T) != T && 710 "Cannot request the size of a dependent type"); 711 // FIXME: this is likely to be wrong once we support template 712 // aliases, since a template alias could refer to a typedef that 713 // has an __aligned__ attribute on it. 714 return getTypeInfo(getCanonicalType(T)); 715 } 716 717 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 718 return std::make_pair(Width, Align); 719} 720 721/// getTypeSizeInChars - Return the size of the specified type, in characters. 722/// This method does not work on incomplete types. 723CharUnits ASTContext::getTypeSizeInChars(QualType T) { 724 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 725} 726CharUnits ASTContext::getTypeSizeInChars(const Type *T) { 727 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 728} 729 730/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 731/// characters. This method does not work on incomplete types. 732CharUnits ASTContext::getTypeAlignInChars(QualType T) { 733 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 734} 735CharUnits ASTContext::getTypeAlignInChars(const Type *T) { 736 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 737} 738 739/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 740/// type for the current target in bits. This can be different than the ABI 741/// alignment in cases where it is beneficial for performance to overalign 742/// a data type. 743unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 744 unsigned ABIAlign = getTypeAlign(T); 745 746 // Double and long long should be naturally aligned if possible. 747 if (const ComplexType* CT = T->getAs<ComplexType>()) 748 T = CT->getElementType().getTypePtr(); 749 if (T->isSpecificBuiltinType(BuiltinType::Double) || 750 T->isSpecificBuiltinType(BuiltinType::LongLong)) 751 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 752 753 return ABIAlign; 754} 755 756static void CollectLocalObjCIvars(ASTContext *Ctx, 757 const ObjCInterfaceDecl *OI, 758 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 759 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 760 E = OI->ivar_end(); I != E; ++I) { 761 ObjCIvarDecl *IVDecl = *I; 762 if (!IVDecl->isInvalidDecl()) 763 Fields.push_back(cast<FieldDecl>(IVDecl)); 764 } 765} 766 767void ASTContext::CollectObjCIvars(const ObjCInterfaceDecl *OI, 768 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 769 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 770 CollectObjCIvars(SuperClass, Fields); 771 CollectLocalObjCIvars(this, OI, Fields); 772} 773 774/// ShallowCollectObjCIvars - 775/// Collect all ivars, including those synthesized, in the current class. 776/// 777void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 778 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 779 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 780 E = OI->ivar_end(); I != E; ++I) { 781 Ivars.push_back(*I); 782 } 783 784 CollectNonClassIvars(OI, Ivars); 785} 786 787/// CollectNonClassIvars - 788/// This routine collects all other ivars which are not declared in the class. 789/// This includes synthesized ivars (via @synthesize) and those in 790// class's @implementation. 791/// 792void ASTContext::CollectNonClassIvars(const ObjCInterfaceDecl *OI, 793 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 794 // Find ivars declared in class extension. 795 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) { 796 for (ObjCCategoryDecl::ivar_iterator I = CDecl->ivar_begin(), 797 E = CDecl->ivar_end(); I != E; ++I) { 798 Ivars.push_back(*I); 799 } 800 } 801 802 // Also add any ivar defined in this class's implementation. This 803 // includes synthesized ivars. 804 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) { 805 for (ObjCImplementationDecl::ivar_iterator I = ImplDecl->ivar_begin(), 806 E = ImplDecl->ivar_end(); I != E; ++I) 807 Ivars.push_back(*I); 808 } 809} 810 811/// CollectInheritedProtocols - Collect all protocols in current class and 812/// those inherited by it. 813void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 814 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 815 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 816 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 817 PE = OI->protocol_end(); P != PE; ++P) { 818 ObjCProtocolDecl *Proto = (*P); 819 Protocols.insert(Proto); 820 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 821 PE = Proto->protocol_end(); P != PE; ++P) { 822 Protocols.insert(*P); 823 CollectInheritedProtocols(*P, Protocols); 824 } 825 } 826 827 // Categories of this Interface. 828 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 829 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 830 CollectInheritedProtocols(CDeclChain, Protocols); 831 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 832 while (SD) { 833 CollectInheritedProtocols(SD, Protocols); 834 SD = SD->getSuperClass(); 835 } 836 return; 837 } 838 if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 839 for (ObjCInterfaceDecl::protocol_iterator P = OC->protocol_begin(), 840 PE = OC->protocol_end(); P != PE; ++P) { 841 ObjCProtocolDecl *Proto = (*P); 842 Protocols.insert(Proto); 843 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 844 PE = Proto->protocol_end(); P != PE; ++P) 845 CollectInheritedProtocols(*P, Protocols); 846 } 847 return; 848 } 849 if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 850 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 851 PE = OP->protocol_end(); P != PE; ++P) { 852 ObjCProtocolDecl *Proto = (*P); 853 Protocols.insert(Proto); 854 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 855 PE = Proto->protocol_end(); P != PE; ++P) 856 CollectInheritedProtocols(*P, Protocols); 857 } 858 return; 859 } 860} 861 862unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) { 863 unsigned count = 0; 864 // Count ivars declared in class extension. 865 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) { 866 for (ObjCCategoryDecl::ivar_iterator I = CDecl->ivar_begin(), 867 E = CDecl->ivar_end(); I != E; ++I) { 868 ++count; 869 } 870 } 871 872 // Count ivar defined in this class's implementation. This 873 // includes synthesized ivars. 874 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 875 for (ObjCImplementationDecl::ivar_iterator I = ImplDecl->ivar_begin(), 876 E = ImplDecl->ivar_end(); I != E; ++I) 877 ++count; 878 return count; 879} 880 881/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 882ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 883 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 884 I = ObjCImpls.find(D); 885 if (I != ObjCImpls.end()) 886 return cast<ObjCImplementationDecl>(I->second); 887 return 0; 888} 889/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 890ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 891 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 892 I = ObjCImpls.find(D); 893 if (I != ObjCImpls.end()) 894 return cast<ObjCCategoryImplDecl>(I->second); 895 return 0; 896} 897 898/// \brief Set the implementation of ObjCInterfaceDecl. 899void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 900 ObjCImplementationDecl *ImplD) { 901 assert(IFaceD && ImplD && "Passed null params"); 902 ObjCImpls[IFaceD] = ImplD; 903} 904/// \brief Set the implementation of ObjCCategoryDecl. 905void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 906 ObjCCategoryImplDecl *ImplD) { 907 assert(CatD && ImplD && "Passed null params"); 908 ObjCImpls[CatD] = ImplD; 909} 910 911/// \brief Allocate an uninitialized TypeSourceInfo. 912/// 913/// The caller should initialize the memory held by TypeSourceInfo using 914/// the TypeLoc wrappers. 915/// 916/// \param T the type that will be the basis for type source info. This type 917/// should refer to how the declarator was written in source code, not to 918/// what type semantic analysis resolved the declarator to. 919TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 920 unsigned DataSize) { 921 if (!DataSize) 922 DataSize = TypeLoc::getFullDataSizeForType(T); 923 else 924 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 925 "incorrect data size provided to CreateTypeSourceInfo!"); 926 927 TypeSourceInfo *TInfo = 928 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 929 new (TInfo) TypeSourceInfo(T); 930 return TInfo; 931} 932 933TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 934 SourceLocation L) { 935 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 936 DI->getTypeLoc().initialize(L); 937 return DI; 938} 939 940/// getInterfaceLayoutImpl - Get or compute information about the 941/// layout of the given interface. 942/// 943/// \param Impl - If given, also include the layout of the interface's 944/// implementation. This may differ by including synthesized ivars. 945const ASTRecordLayout & 946ASTContext::getObjCLayout(const ObjCInterfaceDecl *D, 947 const ObjCImplementationDecl *Impl) { 948 assert(!D->isForwardDecl() && "Invalid interface decl!"); 949 950 // Look up this layout, if already laid out, return what we have. 951 ObjCContainerDecl *Key = 952 Impl ? (ObjCContainerDecl*) Impl : (ObjCContainerDecl*) D; 953 if (const ASTRecordLayout *Entry = ObjCLayouts[Key]) 954 return *Entry; 955 956 // Add in synthesized ivar count if laying out an implementation. 957 if (Impl) { 958 unsigned SynthCount = CountNonClassIvars(D); 959 // If there aren't any sythesized ivars then reuse the interface 960 // entry. Note we can't cache this because we simply free all 961 // entries later; however we shouldn't look up implementations 962 // frequently. 963 if (SynthCount == 0) 964 return getObjCLayout(D, 0); 965 } 966 967 const ASTRecordLayout *NewEntry = 968 ASTRecordLayoutBuilder::ComputeLayout(*this, D, Impl); 969 ObjCLayouts[Key] = NewEntry; 970 971 return *NewEntry; 972} 973 974const ASTRecordLayout & 975ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 976 return getObjCLayout(D, 0); 977} 978 979const ASTRecordLayout & 980ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 981 return getObjCLayout(D->getClassInterface(), D); 982} 983 984/// getASTRecordLayout - Get or compute information about the layout of the 985/// specified record (struct/union/class), which indicates its size and field 986/// position information. 987const ASTRecordLayout &ASTContext::getASTRecordLayout(const RecordDecl *D) { 988 D = D->getDefinition(); 989 assert(D && "Cannot get layout of forward declarations!"); 990 991 // Look up this layout, if already laid out, return what we have. 992 // Note that we can't save a reference to the entry because this function 993 // is recursive. 994 const ASTRecordLayout *Entry = ASTRecordLayouts[D]; 995 if (Entry) return *Entry; 996 997 const ASTRecordLayout *NewEntry = 998 ASTRecordLayoutBuilder::ComputeLayout(*this, D); 999 ASTRecordLayouts[D] = NewEntry; 1000 1001 if (getLangOptions().DumpRecordLayouts) { 1002 llvm::errs() << "\n*** Dumping AST Record Layout\n"; 1003 DumpRecordLayout(D, llvm::errs()); 1004 } 1005 1006 return *NewEntry; 1007} 1008 1009const CXXMethodDecl *ASTContext::getKeyFunction(const CXXRecordDecl *RD) { 1010 RD = cast<CXXRecordDecl>(RD->getDefinition()); 1011 assert(RD && "Cannot get key function for forward declarations!"); 1012 1013 const CXXMethodDecl *&Entry = KeyFunctions[RD]; 1014 if (!Entry) 1015 Entry = ASTRecordLayoutBuilder::ComputeKeyFunction(RD); 1016 else 1017 assert(Entry == ASTRecordLayoutBuilder::ComputeKeyFunction(RD) && 1018 "Key function changed!"); 1019 1020 return Entry; 1021} 1022 1023//===----------------------------------------------------------------------===// 1024// Type creation/memoization methods 1025//===----------------------------------------------------------------------===// 1026 1027QualType ASTContext::getExtQualType(const Type *TypeNode, Qualifiers Quals) { 1028 unsigned Fast = Quals.getFastQualifiers(); 1029 Quals.removeFastQualifiers(); 1030 1031 // Check if we've already instantiated this type. 1032 llvm::FoldingSetNodeID ID; 1033 ExtQuals::Profile(ID, TypeNode, Quals); 1034 void *InsertPos = 0; 1035 if (ExtQuals *EQ = ExtQualNodes.FindNodeOrInsertPos(ID, InsertPos)) { 1036 assert(EQ->getQualifiers() == Quals); 1037 QualType T = QualType(EQ, Fast); 1038 return T; 1039 } 1040 1041 ExtQuals *New = new (*this, TypeAlignment) ExtQuals(*this, TypeNode, Quals); 1042 ExtQualNodes.InsertNode(New, InsertPos); 1043 QualType T = QualType(New, Fast); 1044 return T; 1045} 1046 1047QualType ASTContext::getVolatileType(QualType T) { 1048 QualType CanT = getCanonicalType(T); 1049 if (CanT.isVolatileQualified()) return T; 1050 1051 QualifierCollector Quals; 1052 const Type *TypeNode = Quals.strip(T); 1053 Quals.addVolatile(); 1054 1055 return getExtQualType(TypeNode, Quals); 1056} 1057 1058QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 1059 QualType CanT = getCanonicalType(T); 1060 if (CanT.getAddressSpace() == AddressSpace) 1061 return T; 1062 1063 // If we are composing extended qualifiers together, merge together 1064 // into one ExtQuals node. 1065 QualifierCollector Quals; 1066 const Type *TypeNode = Quals.strip(T); 1067 1068 // If this type already has an address space specified, it cannot get 1069 // another one. 1070 assert(!Quals.hasAddressSpace() && 1071 "Type cannot be in multiple addr spaces!"); 1072 Quals.addAddressSpace(AddressSpace); 1073 1074 return getExtQualType(TypeNode, Quals); 1075} 1076 1077QualType ASTContext::getObjCGCQualType(QualType T, 1078 Qualifiers::GC GCAttr) { 1079 QualType CanT = getCanonicalType(T); 1080 if (CanT.getObjCGCAttr() == GCAttr) 1081 return T; 1082 1083 if (T->isPointerType()) { 1084 QualType Pointee = T->getAs<PointerType>()->getPointeeType(); 1085 if (Pointee->isAnyPointerType()) { 1086 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1087 return getPointerType(ResultType); 1088 } 1089 } 1090 1091 // If we are composing extended qualifiers together, merge together 1092 // into one ExtQuals node. 1093 QualifierCollector Quals; 1094 const Type *TypeNode = Quals.strip(T); 1095 1096 // If this type already has an ObjCGC specified, it cannot get 1097 // another one. 1098 assert(!Quals.hasObjCGCAttr() && 1099 "Type cannot have multiple ObjCGCs!"); 1100 Quals.addObjCGCAttr(GCAttr); 1101 1102 return getExtQualType(TypeNode, Quals); 1103} 1104 1105static QualType getExtFunctionType(ASTContext& Context, QualType T, 1106 const FunctionType::ExtInfo &Info) { 1107 QualType ResultType; 1108 if (const PointerType *Pointer = T->getAs<PointerType>()) { 1109 QualType Pointee = Pointer->getPointeeType(); 1110 ResultType = getExtFunctionType(Context, Pointee, Info); 1111 if (ResultType == Pointee) 1112 return T; 1113 1114 ResultType = Context.getPointerType(ResultType); 1115 } else if (const BlockPointerType *BlockPointer 1116 = T->getAs<BlockPointerType>()) { 1117 QualType Pointee = BlockPointer->getPointeeType(); 1118 ResultType = getExtFunctionType(Context, Pointee, Info); 1119 if (ResultType == Pointee) 1120 return T; 1121 1122 ResultType = Context.getBlockPointerType(ResultType); 1123 } else if (const FunctionType *F = T->getAs<FunctionType>()) { 1124 if (F->getExtInfo() == Info) 1125 return T; 1126 1127 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(F)) { 1128 ResultType = Context.getFunctionNoProtoType(FNPT->getResultType(), 1129 Info); 1130 } else { 1131 const FunctionProtoType *FPT = cast<FunctionProtoType>(F); 1132 ResultType 1133 = Context.getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1134 FPT->getNumArgs(), FPT->isVariadic(), 1135 FPT->getTypeQuals(), 1136 FPT->hasExceptionSpec(), 1137 FPT->hasAnyExceptionSpec(), 1138 FPT->getNumExceptions(), 1139 FPT->exception_begin(), 1140 Info); 1141 } 1142 } else 1143 return T; 1144 1145 return Context.getQualifiedType(ResultType, T.getLocalQualifiers()); 1146} 1147 1148QualType ASTContext::getNoReturnType(QualType T, bool AddNoReturn) { 1149 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1150 return getExtFunctionType(*this, T, 1151 Info.withNoReturn(AddNoReturn)); 1152} 1153 1154QualType ASTContext::getCallConvType(QualType T, CallingConv CallConv) { 1155 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1156 return getExtFunctionType(*this, T, 1157 Info.withCallingConv(CallConv)); 1158} 1159 1160QualType ASTContext::getRegParmType(QualType T, unsigned RegParm) { 1161 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1162 return getExtFunctionType(*this, T, 1163 Info.withRegParm(RegParm)); 1164} 1165 1166/// getComplexType - Return the uniqued reference to the type for a complex 1167/// number with the specified element type. 1168QualType ASTContext::getComplexType(QualType T) { 1169 // Unique pointers, to guarantee there is only one pointer of a particular 1170 // structure. 1171 llvm::FoldingSetNodeID ID; 1172 ComplexType::Profile(ID, T); 1173 1174 void *InsertPos = 0; 1175 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1176 return QualType(CT, 0); 1177 1178 // If the pointee type isn't canonical, this won't be a canonical type either, 1179 // so fill in the canonical type field. 1180 QualType Canonical; 1181 if (!T.isCanonical()) { 1182 Canonical = getComplexType(getCanonicalType(T)); 1183 1184 // Get the new insert position for the node we care about. 1185 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1186 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1187 } 1188 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1189 Types.push_back(New); 1190 ComplexTypes.InsertNode(New, InsertPos); 1191 return QualType(New, 0); 1192} 1193 1194/// getPointerType - Return the uniqued reference to the type for a pointer to 1195/// the specified type. 1196QualType ASTContext::getPointerType(QualType T) { 1197 // Unique pointers, to guarantee there is only one pointer of a particular 1198 // structure. 1199 llvm::FoldingSetNodeID ID; 1200 PointerType::Profile(ID, T); 1201 1202 void *InsertPos = 0; 1203 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1204 return QualType(PT, 0); 1205 1206 // If the pointee type isn't canonical, this won't be a canonical type either, 1207 // so fill in the canonical type field. 1208 QualType Canonical; 1209 if (!T.isCanonical()) { 1210 Canonical = getPointerType(getCanonicalType(T)); 1211 1212 // Get the new insert position for the node we care about. 1213 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1214 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1215 } 1216 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1217 Types.push_back(New); 1218 PointerTypes.InsertNode(New, InsertPos); 1219 return QualType(New, 0); 1220} 1221 1222/// getBlockPointerType - Return the uniqued reference to the type for 1223/// a pointer to the specified block. 1224QualType ASTContext::getBlockPointerType(QualType T) { 1225 assert(T->isFunctionType() && "block of function types only"); 1226 // Unique pointers, to guarantee there is only one block of a particular 1227 // structure. 1228 llvm::FoldingSetNodeID ID; 1229 BlockPointerType::Profile(ID, T); 1230 1231 void *InsertPos = 0; 1232 if (BlockPointerType *PT = 1233 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1234 return QualType(PT, 0); 1235 1236 // If the block pointee type isn't canonical, this won't be a canonical 1237 // type either so fill in the canonical type field. 1238 QualType Canonical; 1239 if (!T.isCanonical()) { 1240 Canonical = getBlockPointerType(getCanonicalType(T)); 1241 1242 // Get the new insert position for the node we care about. 1243 BlockPointerType *NewIP = 1244 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1245 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1246 } 1247 BlockPointerType *New 1248 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1249 Types.push_back(New); 1250 BlockPointerTypes.InsertNode(New, InsertPos); 1251 return QualType(New, 0); 1252} 1253 1254/// getLValueReferenceType - Return the uniqued reference to the type for an 1255/// lvalue reference to the specified type. 1256QualType ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) { 1257 // Unique pointers, to guarantee there is only one pointer of a particular 1258 // structure. 1259 llvm::FoldingSetNodeID ID; 1260 ReferenceType::Profile(ID, T, SpelledAsLValue); 1261 1262 void *InsertPos = 0; 1263 if (LValueReferenceType *RT = 1264 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1265 return QualType(RT, 0); 1266 1267 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1268 1269 // If the referencee type isn't canonical, this won't be a canonical type 1270 // either, so fill in the canonical type field. 1271 QualType Canonical; 1272 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1273 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1274 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1275 1276 // Get the new insert position for the node we care about. 1277 LValueReferenceType *NewIP = 1278 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1279 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1280 } 1281 1282 LValueReferenceType *New 1283 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1284 SpelledAsLValue); 1285 Types.push_back(New); 1286 LValueReferenceTypes.InsertNode(New, InsertPos); 1287 1288 return QualType(New, 0); 1289} 1290 1291/// getRValueReferenceType - Return the uniqued reference to the type for an 1292/// rvalue reference to the specified type. 1293QualType ASTContext::getRValueReferenceType(QualType T) { 1294 // Unique pointers, to guarantee there is only one pointer of a particular 1295 // structure. 1296 llvm::FoldingSetNodeID ID; 1297 ReferenceType::Profile(ID, T, false); 1298 1299 void *InsertPos = 0; 1300 if (RValueReferenceType *RT = 1301 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1302 return QualType(RT, 0); 1303 1304 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1305 1306 // If the referencee type isn't canonical, this won't be a canonical type 1307 // either, so fill in the canonical type field. 1308 QualType Canonical; 1309 if (InnerRef || !T.isCanonical()) { 1310 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1311 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1312 1313 // Get the new insert position for the node we care about. 1314 RValueReferenceType *NewIP = 1315 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1316 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1317 } 1318 1319 RValueReferenceType *New 1320 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1321 Types.push_back(New); 1322 RValueReferenceTypes.InsertNode(New, InsertPos); 1323 return QualType(New, 0); 1324} 1325 1326/// getMemberPointerType - Return the uniqued reference to the type for a 1327/// member pointer to the specified type, in the specified class. 1328QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) { 1329 // Unique pointers, to guarantee there is only one pointer of a particular 1330 // structure. 1331 llvm::FoldingSetNodeID ID; 1332 MemberPointerType::Profile(ID, T, Cls); 1333 1334 void *InsertPos = 0; 1335 if (MemberPointerType *PT = 1336 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1337 return QualType(PT, 0); 1338 1339 // If the pointee or class type isn't canonical, this won't be a canonical 1340 // type either, so fill in the canonical type field. 1341 QualType Canonical; 1342 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1343 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1344 1345 // Get the new insert position for the node we care about. 1346 MemberPointerType *NewIP = 1347 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1348 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1349 } 1350 MemberPointerType *New 1351 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1352 Types.push_back(New); 1353 MemberPointerTypes.InsertNode(New, InsertPos); 1354 return QualType(New, 0); 1355} 1356 1357/// getConstantArrayType - Return the unique reference to the type for an 1358/// array of the specified element type. 1359QualType ASTContext::getConstantArrayType(QualType EltTy, 1360 const llvm::APInt &ArySizeIn, 1361 ArrayType::ArraySizeModifier ASM, 1362 unsigned EltTypeQuals) { 1363 assert((EltTy->isDependentType() || 1364 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1365 "Constant array of VLAs is illegal!"); 1366 1367 // Convert the array size into a canonical width matching the pointer size for 1368 // the target. 1369 llvm::APInt ArySize(ArySizeIn); 1370 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1371 1372 llvm::FoldingSetNodeID ID; 1373 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1374 1375 void *InsertPos = 0; 1376 if (ConstantArrayType *ATP = 1377 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1378 return QualType(ATP, 0); 1379 1380 // If the element type isn't canonical, this won't be a canonical type either, 1381 // so fill in the canonical type field. 1382 QualType Canonical; 1383 if (!EltTy.isCanonical()) { 1384 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1385 ASM, EltTypeQuals); 1386 // Get the new insert position for the node we care about. 1387 ConstantArrayType *NewIP = 1388 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1389 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1390 } 1391 1392 ConstantArrayType *New = new(*this,TypeAlignment) 1393 ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1394 ConstantArrayTypes.InsertNode(New, InsertPos); 1395 Types.push_back(New); 1396 return QualType(New, 0); 1397} 1398 1399/// getVariableArrayType - Returns a non-unique reference to the type for a 1400/// variable array of the specified element type. 1401QualType ASTContext::getVariableArrayType(QualType EltTy, 1402 Expr *NumElts, 1403 ArrayType::ArraySizeModifier ASM, 1404 unsigned EltTypeQuals, 1405 SourceRange Brackets) { 1406 // Since we don't unique expressions, it isn't possible to unique VLA's 1407 // that have an expression provided for their size. 1408 1409 VariableArrayType *New = new(*this, TypeAlignment) 1410 VariableArrayType(EltTy, QualType(), NumElts, ASM, EltTypeQuals, Brackets); 1411 1412 VariableArrayTypes.push_back(New); 1413 Types.push_back(New); 1414 return QualType(New, 0); 1415} 1416 1417/// getDependentSizedArrayType - Returns a non-unique reference to 1418/// the type for a dependently-sized array of the specified element 1419/// type. 1420QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1421 Expr *NumElts, 1422 ArrayType::ArraySizeModifier ASM, 1423 unsigned EltTypeQuals, 1424 SourceRange Brackets) { 1425 assert((!NumElts || NumElts->isTypeDependent() || 1426 NumElts->isValueDependent()) && 1427 "Size must be type- or value-dependent!"); 1428 1429 void *InsertPos = 0; 1430 DependentSizedArrayType *Canon = 0; 1431 llvm::FoldingSetNodeID ID; 1432 1433 if (NumElts) { 1434 // Dependently-sized array types that do not have a specified 1435 // number of elements will have their sizes deduced from an 1436 // initializer. 1437 DependentSizedArrayType::Profile(ID, *this, getCanonicalType(EltTy), ASM, 1438 EltTypeQuals, NumElts); 1439 1440 Canon = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1441 } 1442 1443 DependentSizedArrayType *New; 1444 if (Canon) { 1445 // We already have a canonical version of this array type; use it as 1446 // the canonical type for a newly-built type. 1447 New = new (*this, TypeAlignment) 1448 DependentSizedArrayType(*this, EltTy, QualType(Canon, 0), 1449 NumElts, ASM, EltTypeQuals, Brackets); 1450 } else { 1451 QualType CanonEltTy = getCanonicalType(EltTy); 1452 if (CanonEltTy == EltTy) { 1453 New = new (*this, TypeAlignment) 1454 DependentSizedArrayType(*this, EltTy, QualType(), 1455 NumElts, ASM, EltTypeQuals, Brackets); 1456 1457 if (NumElts) { 1458 DependentSizedArrayType *CanonCheck 1459 = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1460 assert(!CanonCheck && "Dependent-sized canonical array type broken"); 1461 (void)CanonCheck; 1462 DependentSizedArrayTypes.InsertNode(New, InsertPos); 1463 } 1464 } else { 1465 QualType Canon = getDependentSizedArrayType(CanonEltTy, NumElts, 1466 ASM, EltTypeQuals, 1467 SourceRange()); 1468 New = new (*this, TypeAlignment) 1469 DependentSizedArrayType(*this, EltTy, Canon, 1470 NumElts, ASM, EltTypeQuals, Brackets); 1471 } 1472 } 1473 1474 Types.push_back(New); 1475 return QualType(New, 0); 1476} 1477 1478QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1479 ArrayType::ArraySizeModifier ASM, 1480 unsigned EltTypeQuals) { 1481 llvm::FoldingSetNodeID ID; 1482 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1483 1484 void *InsertPos = 0; 1485 if (IncompleteArrayType *ATP = 1486 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1487 return QualType(ATP, 0); 1488 1489 // If the element type isn't canonical, this won't be a canonical type 1490 // either, so fill in the canonical type field. 1491 QualType Canonical; 1492 1493 if (!EltTy.isCanonical()) { 1494 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1495 ASM, EltTypeQuals); 1496 1497 // Get the new insert position for the node we care about. 1498 IncompleteArrayType *NewIP = 1499 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1500 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1501 } 1502 1503 IncompleteArrayType *New = new (*this, TypeAlignment) 1504 IncompleteArrayType(EltTy, Canonical, ASM, EltTypeQuals); 1505 1506 IncompleteArrayTypes.InsertNode(New, InsertPos); 1507 Types.push_back(New); 1508 return QualType(New, 0); 1509} 1510 1511/// getVectorType - Return the unique reference to a vector type of 1512/// the specified element type and size. VectorType must be a built-in type. 1513QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1514 bool IsAltiVec, bool IsPixel) { 1515 BuiltinType *baseType; 1516 1517 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1518 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1519 1520 // Check if we've already instantiated a vector of this type. 1521 llvm::FoldingSetNodeID ID; 1522 VectorType::Profile(ID, vecType, NumElts, Type::Vector, 1523 IsAltiVec, IsPixel); 1524 void *InsertPos = 0; 1525 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1526 return QualType(VTP, 0); 1527 1528 // If the element type isn't canonical, this won't be a canonical type either, 1529 // so fill in the canonical type field. 1530 QualType Canonical; 1531 if (!vecType.isCanonical() || IsAltiVec || IsPixel) { 1532 Canonical = getVectorType(getCanonicalType(vecType), 1533 NumElts, false, false); 1534 1535 // Get the new insert position for the node we care about. 1536 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1537 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1538 } 1539 VectorType *New = new (*this, TypeAlignment) 1540 VectorType(vecType, NumElts, Canonical, IsAltiVec, IsPixel); 1541 VectorTypes.InsertNode(New, InsertPos); 1542 Types.push_back(New); 1543 return QualType(New, 0); 1544} 1545 1546/// getExtVectorType - Return the unique reference to an extended vector type of 1547/// the specified element type and size. VectorType must be a built-in type. 1548QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1549 BuiltinType *baseType; 1550 1551 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1552 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1553 1554 // Check if we've already instantiated a vector of this type. 1555 llvm::FoldingSetNodeID ID; 1556 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, false, false); 1557 void *InsertPos = 0; 1558 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1559 return QualType(VTP, 0); 1560 1561 // If the element type isn't canonical, this won't be a canonical type either, 1562 // so fill in the canonical type field. 1563 QualType Canonical; 1564 if (!vecType.isCanonical()) { 1565 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1566 1567 // Get the new insert position for the node we care about. 1568 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1569 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1570 } 1571 ExtVectorType *New = new (*this, TypeAlignment) 1572 ExtVectorType(vecType, NumElts, Canonical); 1573 VectorTypes.InsertNode(New, InsertPos); 1574 Types.push_back(New); 1575 return QualType(New, 0); 1576} 1577 1578QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1579 Expr *SizeExpr, 1580 SourceLocation AttrLoc) { 1581 llvm::FoldingSetNodeID ID; 1582 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1583 SizeExpr); 1584 1585 void *InsertPos = 0; 1586 DependentSizedExtVectorType *Canon 1587 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1588 DependentSizedExtVectorType *New; 1589 if (Canon) { 1590 // We already have a canonical version of this array type; use it as 1591 // the canonical type for a newly-built type. 1592 New = new (*this, TypeAlignment) 1593 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1594 SizeExpr, AttrLoc); 1595 } else { 1596 QualType CanonVecTy = getCanonicalType(vecType); 1597 if (CanonVecTy == vecType) { 1598 New = new (*this, TypeAlignment) 1599 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1600 AttrLoc); 1601 1602 DependentSizedExtVectorType *CanonCheck 1603 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1604 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1605 (void)CanonCheck; 1606 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1607 } else { 1608 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1609 SourceLocation()); 1610 New = new (*this, TypeAlignment) 1611 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1612 } 1613 } 1614 1615 Types.push_back(New); 1616 return QualType(New, 0); 1617} 1618 1619/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1620/// 1621QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, 1622 const FunctionType::ExtInfo &Info) { 1623 const CallingConv CallConv = Info.getCC(); 1624 // Unique functions, to guarantee there is only one function of a particular 1625 // structure. 1626 llvm::FoldingSetNodeID ID; 1627 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1628 1629 void *InsertPos = 0; 1630 if (FunctionNoProtoType *FT = 1631 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1632 return QualType(FT, 0); 1633 1634 QualType Canonical; 1635 if (!ResultTy.isCanonical() || 1636 getCanonicalCallConv(CallConv) != CallConv) { 1637 Canonical = 1638 getFunctionNoProtoType(getCanonicalType(ResultTy), 1639 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1640 1641 // Get the new insert position for the node we care about. 1642 FunctionNoProtoType *NewIP = 1643 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1644 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1645 } 1646 1647 FunctionNoProtoType *New = new (*this, TypeAlignment) 1648 FunctionNoProtoType(ResultTy, Canonical, Info); 1649 Types.push_back(New); 1650 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1651 return QualType(New, 0); 1652} 1653 1654/// getFunctionType - Return a normal function type with a typed argument 1655/// list. isVariadic indicates whether the argument list includes '...'. 1656QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1657 unsigned NumArgs, bool isVariadic, 1658 unsigned TypeQuals, bool hasExceptionSpec, 1659 bool hasAnyExceptionSpec, unsigned NumExs, 1660 const QualType *ExArray, 1661 const FunctionType::ExtInfo &Info) { 1662 const CallingConv CallConv= Info.getCC(); 1663 // Unique functions, to guarantee there is only one function of a particular 1664 // structure. 1665 llvm::FoldingSetNodeID ID; 1666 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1667 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1668 NumExs, ExArray, Info); 1669 1670 void *InsertPos = 0; 1671 if (FunctionProtoType *FTP = 1672 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1673 return QualType(FTP, 0); 1674 1675 // Determine whether the type being created is already canonical or not. 1676 bool isCanonical = !hasExceptionSpec && ResultTy.isCanonical(); 1677 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1678 if (!ArgArray[i].isCanonicalAsParam()) 1679 isCanonical = false; 1680 1681 // If this type isn't canonical, get the canonical version of it. 1682 // The exception spec is not part of the canonical type. 1683 QualType Canonical; 1684 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1685 llvm::SmallVector<QualType, 16> CanonicalArgs; 1686 CanonicalArgs.reserve(NumArgs); 1687 for (unsigned i = 0; i != NumArgs; ++i) 1688 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1689 1690 Canonical = getFunctionType(getCanonicalType(ResultTy), 1691 CanonicalArgs.data(), NumArgs, 1692 isVariadic, TypeQuals, false, 1693 false, 0, 0, 1694 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1695 1696 // Get the new insert position for the node we care about. 1697 FunctionProtoType *NewIP = 1698 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1699 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1700 } 1701 1702 // FunctionProtoType objects are allocated with extra bytes after them 1703 // for two variable size arrays (for parameter and exception types) at the 1704 // end of them. 1705 FunctionProtoType *FTP = 1706 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1707 NumArgs*sizeof(QualType) + 1708 NumExs*sizeof(QualType), TypeAlignment); 1709 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1710 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1711 ExArray, NumExs, Canonical, Info); 1712 Types.push_back(FTP); 1713 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1714 return QualType(FTP, 0); 1715} 1716 1717#ifndef NDEBUG 1718static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1719 if (!isa<CXXRecordDecl>(D)) return false; 1720 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1721 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1722 return true; 1723 if (RD->getDescribedClassTemplate() && 1724 !isa<ClassTemplateSpecializationDecl>(RD)) 1725 return true; 1726 return false; 1727} 1728#endif 1729 1730/// getInjectedClassNameType - Return the unique reference to the 1731/// injected class name type for the specified templated declaration. 1732QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1733 QualType TST) { 1734 assert(NeedsInjectedClassNameType(Decl)); 1735 if (Decl->TypeForDecl) { 1736 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1737 } else if (CXXRecordDecl *PrevDecl 1738 = cast_or_null<CXXRecordDecl>(Decl->getPreviousDeclaration())) { 1739 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1740 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1741 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1742 } else { 1743 Decl->TypeForDecl = new (*this, TypeAlignment) 1744 InjectedClassNameType(Decl, TST, TST->getCanonicalTypeInternal()); 1745 Types.push_back(Decl->TypeForDecl); 1746 } 1747 return QualType(Decl->TypeForDecl, 0); 1748} 1749 1750/// getTypeDeclType - Return the unique reference to the type for the 1751/// specified type declaration. 1752QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) { 1753 assert(Decl && "Passed null for Decl param"); 1754 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 1755 1756 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1757 return getTypedefType(Typedef); 1758 1759 if (const ObjCInterfaceDecl *ObjCInterface 1760 = dyn_cast<ObjCInterfaceDecl>(Decl)) 1761 return getObjCInterfaceType(ObjCInterface); 1762 1763 assert(!isa<TemplateTypeParmDecl>(Decl) && 1764 "Template type parameter types are always available."); 1765 1766 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1767 assert(!Record->getPreviousDeclaration() && 1768 "struct/union has previous declaration"); 1769 assert(!NeedsInjectedClassNameType(Record)); 1770 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Record); 1771 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1772 assert(!Enum->getPreviousDeclaration() && 1773 "enum has previous declaration"); 1774 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Enum); 1775 } else if (const UnresolvedUsingTypenameDecl *Using = 1776 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1777 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1778 } else 1779 llvm_unreachable("TypeDecl without a type?"); 1780 1781 Types.push_back(Decl->TypeForDecl); 1782 return QualType(Decl->TypeForDecl, 0); 1783} 1784 1785/// getTypedefType - Return the unique reference to the type for the 1786/// specified typename decl. 1787QualType ASTContext::getTypedefType(const TypedefDecl *Decl) { 1788 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1789 1790 QualType Canonical = getCanonicalType(Decl->getUnderlyingType()); 1791 Decl->TypeForDecl = new(*this, TypeAlignment) 1792 TypedefType(Type::Typedef, Decl, Canonical); 1793 Types.push_back(Decl->TypeForDecl); 1794 return QualType(Decl->TypeForDecl, 0); 1795} 1796 1797/// \brief Retrieve a substitution-result type. 1798QualType 1799ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1800 QualType Replacement) { 1801 assert(Replacement.isCanonical() 1802 && "replacement types must always be canonical"); 1803 1804 llvm::FoldingSetNodeID ID; 1805 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1806 void *InsertPos = 0; 1807 SubstTemplateTypeParmType *SubstParm 1808 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1809 1810 if (!SubstParm) { 1811 SubstParm = new (*this, TypeAlignment) 1812 SubstTemplateTypeParmType(Parm, Replacement); 1813 Types.push_back(SubstParm); 1814 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1815 } 1816 1817 return QualType(SubstParm, 0); 1818} 1819 1820/// \brief Retrieve the template type parameter type for a template 1821/// parameter or parameter pack with the given depth, index, and (optionally) 1822/// name. 1823QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1824 bool ParameterPack, 1825 IdentifierInfo *Name) { 1826 llvm::FoldingSetNodeID ID; 1827 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1828 void *InsertPos = 0; 1829 TemplateTypeParmType *TypeParm 1830 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1831 1832 if (TypeParm) 1833 return QualType(TypeParm, 0); 1834 1835 if (Name) { 1836 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1837 TypeParm = new (*this, TypeAlignment) 1838 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 1839 1840 TemplateTypeParmType *TypeCheck 1841 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1842 assert(!TypeCheck && "Template type parameter canonical type broken"); 1843 (void)TypeCheck; 1844 } else 1845 TypeParm = new (*this, TypeAlignment) 1846 TemplateTypeParmType(Depth, Index, ParameterPack); 1847 1848 Types.push_back(TypeParm); 1849 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1850 1851 return QualType(TypeParm, 0); 1852} 1853 1854TypeSourceInfo * 1855ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 1856 SourceLocation NameLoc, 1857 const TemplateArgumentListInfo &Args, 1858 QualType CanonType) { 1859 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 1860 1861 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 1862 TemplateSpecializationTypeLoc TL 1863 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 1864 TL.setTemplateNameLoc(NameLoc); 1865 TL.setLAngleLoc(Args.getLAngleLoc()); 1866 TL.setRAngleLoc(Args.getRAngleLoc()); 1867 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 1868 TL.setArgLocInfo(i, Args[i].getLocInfo()); 1869 return DI; 1870} 1871 1872QualType 1873ASTContext::getTemplateSpecializationType(TemplateName Template, 1874 const TemplateArgumentListInfo &Args, 1875 QualType Canon) { 1876 unsigned NumArgs = Args.size(); 1877 1878 llvm::SmallVector<TemplateArgument, 4> ArgVec; 1879 ArgVec.reserve(NumArgs); 1880 for (unsigned i = 0; i != NumArgs; ++i) 1881 ArgVec.push_back(Args[i].getArgument()); 1882 1883 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, Canon); 1884} 1885 1886QualType 1887ASTContext::getTemplateSpecializationType(TemplateName Template, 1888 const TemplateArgument *Args, 1889 unsigned NumArgs, 1890 QualType Canon) { 1891 if (!Canon.isNull()) 1892 Canon = getCanonicalType(Canon); 1893 else { 1894 // Build the canonical template specialization type. 1895 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 1896 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 1897 CanonArgs.reserve(NumArgs); 1898 for (unsigned I = 0; I != NumArgs; ++I) 1899 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 1900 1901 // Determine whether this canonical template specialization type already 1902 // exists. 1903 llvm::FoldingSetNodeID ID; 1904 TemplateSpecializationType::Profile(ID, CanonTemplate, 1905 CanonArgs.data(), NumArgs, *this); 1906 1907 void *InsertPos = 0; 1908 TemplateSpecializationType *Spec 1909 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1910 1911 if (!Spec) { 1912 // Allocate a new canonical template specialization type. 1913 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1914 sizeof(TemplateArgument) * NumArgs), 1915 TypeAlignment); 1916 Spec = new (Mem) TemplateSpecializationType(*this, CanonTemplate, 1917 CanonArgs.data(), NumArgs, 1918 Canon); 1919 Types.push_back(Spec); 1920 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1921 } 1922 1923 if (Canon.isNull()) 1924 Canon = QualType(Spec, 0); 1925 assert(Canon->isDependentType() && 1926 "Non-dependent template-id type must have a canonical type"); 1927 } 1928 1929 // Allocate the (non-canonical) template specialization type, but don't 1930 // try to unique it: these types typically have location information that 1931 // we don't unique and don't want to lose. 1932 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1933 sizeof(TemplateArgument) * NumArgs), 1934 TypeAlignment); 1935 TemplateSpecializationType *Spec 1936 = new (Mem) TemplateSpecializationType(*this, Template, Args, NumArgs, 1937 Canon); 1938 1939 Types.push_back(Spec); 1940 return QualType(Spec, 0); 1941} 1942 1943QualType 1944ASTContext::getQualifiedNameType(NestedNameSpecifier *NNS, 1945 QualType NamedType) { 1946 llvm::FoldingSetNodeID ID; 1947 QualifiedNameType::Profile(ID, NNS, NamedType); 1948 1949 void *InsertPos = 0; 1950 QualifiedNameType *T 1951 = QualifiedNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1952 if (T) 1953 return QualType(T, 0); 1954 1955 QualType Canon = NamedType; 1956 if (!Canon.isCanonical()) { 1957 Canon = getCanonicalType(NamedType); 1958 QualifiedNameType *CheckT 1959 = QualifiedNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1960 assert(!CheckT && "Qualified name canonical type broken"); 1961 (void)CheckT; 1962 } 1963 1964 T = new (*this) QualifiedNameType(NNS, NamedType, Canon); 1965 Types.push_back(T); 1966 QualifiedNameTypes.InsertNode(T, InsertPos); 1967 return QualType(T, 0); 1968} 1969 1970QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 1971 NestedNameSpecifier *NNS, 1972 const IdentifierInfo *Name, 1973 QualType Canon) { 1974 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1975 1976 if (Canon.isNull()) { 1977 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1978 ElaboratedTypeKeyword CanonKeyword = Keyword; 1979 if (Keyword == ETK_None) 1980 CanonKeyword = ETK_Typename; 1981 1982 if (CanonNNS != NNS || CanonKeyword != Keyword) 1983 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 1984 } 1985 1986 llvm::FoldingSetNodeID ID; 1987 DependentNameType::Profile(ID, Keyword, NNS, Name); 1988 1989 void *InsertPos = 0; 1990 DependentNameType *T 1991 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1992 if (T) 1993 return QualType(T, 0); 1994 1995 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 1996 Types.push_back(T); 1997 DependentNameTypes.InsertNode(T, InsertPos); 1998 return QualType(T, 0); 1999} 2000 2001QualType 2002ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 2003 NestedNameSpecifier *NNS, 2004 const TemplateSpecializationType *TemplateId, 2005 QualType Canon) { 2006 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2007 2008 llvm::FoldingSetNodeID ID; 2009 DependentNameType::Profile(ID, Keyword, NNS, TemplateId); 2010 2011 void *InsertPos = 0; 2012 DependentNameType *T 2013 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2014 if (T) 2015 return QualType(T, 0); 2016 2017 if (Canon.isNull()) { 2018 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2019 QualType CanonType = getCanonicalType(QualType(TemplateId, 0)); 2020 ElaboratedTypeKeyword CanonKeyword = Keyword; 2021 if (Keyword == ETK_None) 2022 CanonKeyword = ETK_Typename; 2023 if (CanonNNS != NNS || CanonKeyword != Keyword || 2024 CanonType != QualType(TemplateId, 0)) { 2025 const TemplateSpecializationType *CanonTemplateId 2026 = CanonType->getAs<TemplateSpecializationType>(); 2027 assert(CanonTemplateId && 2028 "Canonical type must also be a template specialization type"); 2029 Canon = getDependentNameType(CanonKeyword, CanonNNS, CanonTemplateId); 2030 } 2031 2032 DependentNameType *CheckT 2033 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2034 assert(!CheckT && "Typename canonical type is broken"); (void)CheckT; 2035 } 2036 2037 T = new (*this) DependentNameType(Keyword, NNS, TemplateId, Canon); 2038 Types.push_back(T); 2039 DependentNameTypes.InsertNode(T, InsertPos); 2040 return QualType(T, 0); 2041} 2042 2043QualType 2044ASTContext::getElaboratedType(QualType UnderlyingType, 2045 ElaboratedType::TagKind Tag) { 2046 llvm::FoldingSetNodeID ID; 2047 ElaboratedType::Profile(ID, UnderlyingType, Tag); 2048 2049 void *InsertPos = 0; 2050 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2051 if (T) 2052 return QualType(T, 0); 2053 2054 QualType Canon = UnderlyingType; 2055 if (!Canon.isCanonical()) { 2056 Canon = getCanonicalType(Canon); 2057 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2058 assert(!CheckT && "Elaborated canonical type is broken"); (void)CheckT; 2059 } 2060 2061 T = new (*this) ElaboratedType(UnderlyingType, Tag, Canon); 2062 Types.push_back(T); 2063 ElaboratedTypes.InsertNode(T, InsertPos); 2064 return QualType(T, 0); 2065} 2066 2067/// CmpProtocolNames - Comparison predicate for sorting protocols 2068/// alphabetically. 2069static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2070 const ObjCProtocolDecl *RHS) { 2071 return LHS->getDeclName() < RHS->getDeclName(); 2072} 2073 2074static bool areSortedAndUniqued(ObjCProtocolDecl **Protocols, 2075 unsigned NumProtocols) { 2076 if (NumProtocols == 0) return true; 2077 2078 for (unsigned i = 1; i != NumProtocols; ++i) 2079 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2080 return false; 2081 return true; 2082} 2083 2084static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2085 unsigned &NumProtocols) { 2086 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2087 2088 // Sort protocols, keyed by name. 2089 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2090 2091 // Remove duplicates. 2092 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2093 NumProtocols = ProtocolsEnd-Protocols; 2094} 2095 2096/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2097/// the given interface decl and the conforming protocol list. 2098QualType ASTContext::getObjCObjectPointerType(QualType InterfaceT, 2099 ObjCProtocolDecl **Protocols, 2100 unsigned NumProtocols, 2101 unsigned Quals) { 2102 llvm::FoldingSetNodeID ID; 2103 ObjCObjectPointerType::Profile(ID, InterfaceT, Protocols, NumProtocols); 2104 Qualifiers Qs = Qualifiers::fromCVRMask(Quals); 2105 2106 void *InsertPos = 0; 2107 if (ObjCObjectPointerType *QT = 2108 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2109 return getQualifiedType(QualType(QT, 0), Qs); 2110 2111 // Sort the protocol list alphabetically to canonicalize it. 2112 QualType Canonical; 2113 if (!InterfaceT.isCanonical() || 2114 !areSortedAndUniqued(Protocols, NumProtocols)) { 2115 if (!areSortedAndUniqued(Protocols, NumProtocols)) { 2116 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(NumProtocols); 2117 unsigned UniqueCount = NumProtocols; 2118 2119 std::copy(Protocols, Protocols + NumProtocols, Sorted.begin()); 2120 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2121 2122 Canonical = getObjCObjectPointerType(getCanonicalType(InterfaceT), 2123 &Sorted[0], UniqueCount); 2124 } else { 2125 Canonical = getObjCObjectPointerType(getCanonicalType(InterfaceT), 2126 Protocols, NumProtocols); 2127 } 2128 2129 // Regenerate InsertPos. 2130 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2131 } 2132 2133 // No match. 2134 unsigned Size = sizeof(ObjCObjectPointerType) 2135 + NumProtocols * sizeof(ObjCProtocolDecl *); 2136 void *Mem = Allocate(Size, TypeAlignment); 2137 ObjCObjectPointerType *QType = new (Mem) ObjCObjectPointerType(Canonical, 2138 InterfaceT, 2139 Protocols, 2140 NumProtocols); 2141 2142 Types.push_back(QType); 2143 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2144 return getQualifiedType(QualType(QType, 0), Qs); 2145} 2146 2147/// getObjCInterfaceType - Return the unique reference to the type for the 2148/// specified ObjC interface decl. The list of protocols is optional. 2149QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 2150 ObjCProtocolDecl **Protocols, unsigned NumProtocols) { 2151 llvm::FoldingSetNodeID ID; 2152 ObjCInterfaceType::Profile(ID, Decl, Protocols, NumProtocols); 2153 2154 void *InsertPos = 0; 2155 if (ObjCInterfaceType *QT = 2156 ObjCInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos)) 2157 return QualType(QT, 0); 2158 2159 // Sort the protocol list alphabetically to canonicalize it. 2160 QualType Canonical; 2161 if (NumProtocols && !areSortedAndUniqued(Protocols, NumProtocols)) { 2162 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(NumProtocols); 2163 std::copy(Protocols, Protocols + NumProtocols, Sorted.begin()); 2164 2165 unsigned UniqueCount = NumProtocols; 2166 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2167 2168 Canonical = getObjCInterfaceType(Decl, &Sorted[0], UniqueCount); 2169 2170 ObjCInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos); 2171 } 2172 2173 unsigned Size = sizeof(ObjCInterfaceType) 2174 + NumProtocols * sizeof(ObjCProtocolDecl *); 2175 void *Mem = Allocate(Size, TypeAlignment); 2176 ObjCInterfaceType *QType = new (Mem) ObjCInterfaceType(Canonical, 2177 const_cast<ObjCInterfaceDecl*>(Decl), 2178 Protocols, 2179 NumProtocols); 2180 2181 Types.push_back(QType); 2182 ObjCInterfaceTypes.InsertNode(QType, InsertPos); 2183 return QualType(QType, 0); 2184} 2185 2186/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2187/// TypeOfExprType AST's (since expression's are never shared). For example, 2188/// multiple declarations that refer to "typeof(x)" all contain different 2189/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2190/// on canonical type's (which are always unique). 2191QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2192 TypeOfExprType *toe; 2193 if (tofExpr->isTypeDependent()) { 2194 llvm::FoldingSetNodeID ID; 2195 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2196 2197 void *InsertPos = 0; 2198 DependentTypeOfExprType *Canon 2199 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2200 if (Canon) { 2201 // We already have a "canonical" version of an identical, dependent 2202 // typeof(expr) type. Use that as our canonical type. 2203 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2204 QualType((TypeOfExprType*)Canon, 0)); 2205 } 2206 else { 2207 // Build a new, canonical typeof(expr) type. 2208 Canon 2209 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2210 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2211 toe = Canon; 2212 } 2213 } else { 2214 QualType Canonical = getCanonicalType(tofExpr->getType()); 2215 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2216 } 2217 Types.push_back(toe); 2218 return QualType(toe, 0); 2219} 2220 2221/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2222/// TypeOfType AST's. The only motivation to unique these nodes would be 2223/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2224/// an issue. This doesn't effect the type checker, since it operates 2225/// on canonical type's (which are always unique). 2226QualType ASTContext::getTypeOfType(QualType tofType) { 2227 QualType Canonical = getCanonicalType(tofType); 2228 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2229 Types.push_back(tot); 2230 return QualType(tot, 0); 2231} 2232 2233/// getDecltypeForExpr - Given an expr, will return the decltype for that 2234/// expression, according to the rules in C++0x [dcl.type.simple]p4 2235static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2236 if (e->isTypeDependent()) 2237 return Context.DependentTy; 2238 2239 // If e is an id expression or a class member access, decltype(e) is defined 2240 // as the type of the entity named by e. 2241 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2242 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2243 return VD->getType(); 2244 } 2245 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2246 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2247 return FD->getType(); 2248 } 2249 // If e is a function call or an invocation of an overloaded operator, 2250 // (parentheses around e are ignored), decltype(e) is defined as the 2251 // return type of that function. 2252 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2253 return CE->getCallReturnType(); 2254 2255 QualType T = e->getType(); 2256 2257 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2258 // defined as T&, otherwise decltype(e) is defined as T. 2259 if (e->isLvalue(Context) == Expr::LV_Valid) 2260 T = Context.getLValueReferenceType(T); 2261 2262 return T; 2263} 2264 2265/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2266/// DecltypeType AST's. The only motivation to unique these nodes would be 2267/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2268/// an issue. This doesn't effect the type checker, since it operates 2269/// on canonical type's (which are always unique). 2270QualType ASTContext::getDecltypeType(Expr *e) { 2271 DecltypeType *dt; 2272 if (e->isTypeDependent()) { 2273 llvm::FoldingSetNodeID ID; 2274 DependentDecltypeType::Profile(ID, *this, e); 2275 2276 void *InsertPos = 0; 2277 DependentDecltypeType *Canon 2278 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2279 if (Canon) { 2280 // We already have a "canonical" version of an equivalent, dependent 2281 // decltype type. Use that as our canonical type. 2282 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2283 QualType((DecltypeType*)Canon, 0)); 2284 } 2285 else { 2286 // Build a new, canonical typeof(expr) type. 2287 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2288 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2289 dt = Canon; 2290 } 2291 } else { 2292 QualType T = getDecltypeForExpr(e, *this); 2293 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2294 } 2295 Types.push_back(dt); 2296 return QualType(dt, 0); 2297} 2298 2299/// getTagDeclType - Return the unique reference to the type for the 2300/// specified TagDecl (struct/union/class/enum) decl. 2301QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2302 assert (Decl); 2303 // FIXME: What is the design on getTagDeclType when it requires casting 2304 // away const? mutable? 2305 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2306} 2307 2308/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2309/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2310/// needs to agree with the definition in <stddef.h>. 2311CanQualType ASTContext::getSizeType() const { 2312 return getFromTargetType(Target.getSizeType()); 2313} 2314 2315/// getSignedWCharType - Return the type of "signed wchar_t". 2316/// Used when in C++, as a GCC extension. 2317QualType ASTContext::getSignedWCharType() const { 2318 // FIXME: derive from "Target" ? 2319 return WCharTy; 2320} 2321 2322/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2323/// Used when in C++, as a GCC extension. 2324QualType ASTContext::getUnsignedWCharType() const { 2325 // FIXME: derive from "Target" ? 2326 return UnsignedIntTy; 2327} 2328 2329/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2330/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2331QualType ASTContext::getPointerDiffType() const { 2332 return getFromTargetType(Target.getPtrDiffType(0)); 2333} 2334 2335//===----------------------------------------------------------------------===// 2336// Type Operators 2337//===----------------------------------------------------------------------===// 2338 2339CanQualType ASTContext::getCanonicalParamType(QualType T) { 2340 // Push qualifiers into arrays, and then discard any remaining 2341 // qualifiers. 2342 T = getCanonicalType(T); 2343 const Type *Ty = T.getTypePtr(); 2344 2345 QualType Result; 2346 if (isa<ArrayType>(Ty)) { 2347 Result = getArrayDecayedType(QualType(Ty,0)); 2348 } else if (isa<FunctionType>(Ty)) { 2349 Result = getPointerType(QualType(Ty, 0)); 2350 } else { 2351 Result = QualType(Ty, 0); 2352 } 2353 2354 return CanQualType::CreateUnsafe(Result); 2355} 2356 2357/// getCanonicalType - Return the canonical (structural) type corresponding to 2358/// the specified potentially non-canonical type. The non-canonical version 2359/// of a type may have many "decorated" versions of types. Decorators can 2360/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2361/// to be free of any of these, allowing two canonical types to be compared 2362/// for exact equality with a simple pointer comparison. 2363CanQualType ASTContext::getCanonicalType(QualType T) { 2364 QualifierCollector Quals; 2365 const Type *Ptr = Quals.strip(T); 2366 QualType CanType = Ptr->getCanonicalTypeInternal(); 2367 2368 // The canonical internal type will be the canonical type *except* 2369 // that we push type qualifiers down through array types. 2370 2371 // If there are no new qualifiers to push down, stop here. 2372 if (!Quals.hasQualifiers()) 2373 return CanQualType::CreateUnsafe(CanType); 2374 2375 // If the type qualifiers are on an array type, get the canonical 2376 // type of the array with the qualifiers applied to the element 2377 // type. 2378 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2379 if (!AT) 2380 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2381 2382 // Get the canonical version of the element with the extra qualifiers on it. 2383 // This can recursively sink qualifiers through multiple levels of arrays. 2384 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2385 NewEltTy = getCanonicalType(NewEltTy); 2386 2387 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2388 return CanQualType::CreateUnsafe( 2389 getConstantArrayType(NewEltTy, CAT->getSize(), 2390 CAT->getSizeModifier(), 2391 CAT->getIndexTypeCVRQualifiers())); 2392 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2393 return CanQualType::CreateUnsafe( 2394 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2395 IAT->getIndexTypeCVRQualifiers())); 2396 2397 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2398 return CanQualType::CreateUnsafe( 2399 getDependentSizedArrayType(NewEltTy, 2400 DSAT->getSizeExpr() ? 2401 DSAT->getSizeExpr()->Retain() : 0, 2402 DSAT->getSizeModifier(), 2403 DSAT->getIndexTypeCVRQualifiers(), 2404 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2405 2406 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2407 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2408 VAT->getSizeExpr() ? 2409 VAT->getSizeExpr()->Retain() : 0, 2410 VAT->getSizeModifier(), 2411 VAT->getIndexTypeCVRQualifiers(), 2412 VAT->getBracketsRange())); 2413} 2414 2415QualType ASTContext::getUnqualifiedArrayType(QualType T, 2416 Qualifiers &Quals) { 2417 Quals = T.getQualifiers(); 2418 if (!isa<ArrayType>(T)) { 2419 return T.getUnqualifiedType(); 2420 } 2421 2422 const ArrayType *AT = cast<ArrayType>(T); 2423 QualType Elt = AT->getElementType(); 2424 QualType UnqualElt = getUnqualifiedArrayType(Elt, Quals); 2425 if (Elt == UnqualElt) 2426 return T; 2427 2428 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(T)) { 2429 return getConstantArrayType(UnqualElt, CAT->getSize(), 2430 CAT->getSizeModifier(), 0); 2431 } 2432 2433 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(T)) { 2434 return getIncompleteArrayType(UnqualElt, IAT->getSizeModifier(), 0); 2435 } 2436 2437 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(T); 2438 return getDependentSizedArrayType(UnqualElt, DSAT->getSizeExpr()->Retain(), 2439 DSAT->getSizeModifier(), 0, 2440 SourceRange()); 2441} 2442 2443DeclarationName ASTContext::getNameForTemplate(TemplateName Name) { 2444 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2445 return TD->getDeclName(); 2446 2447 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2448 if (DTN->isIdentifier()) { 2449 return DeclarationNames.getIdentifier(DTN->getIdentifier()); 2450 } else { 2451 return DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2452 } 2453 } 2454 2455 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2456 assert(Storage); 2457 return (*Storage->begin())->getDeclName(); 2458} 2459 2460TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2461 // If this template name refers to a template, the canonical 2462 // template name merely stores the template itself. 2463 if (TemplateDecl *Template = Name.getAsTemplateDecl()) 2464 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2465 2466 assert(!Name.getAsOverloadedTemplate()); 2467 2468 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2469 assert(DTN && "Non-dependent template names must refer to template decls."); 2470 return DTN->CanonicalTemplateName; 2471} 2472 2473bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2474 X = getCanonicalTemplateName(X); 2475 Y = getCanonicalTemplateName(Y); 2476 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2477} 2478 2479TemplateArgument 2480ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2481 switch (Arg.getKind()) { 2482 case TemplateArgument::Null: 2483 return Arg; 2484 2485 case TemplateArgument::Expression: 2486 return Arg; 2487 2488 case TemplateArgument::Declaration: 2489 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2490 2491 case TemplateArgument::Template: 2492 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2493 2494 case TemplateArgument::Integral: 2495 return TemplateArgument(*Arg.getAsIntegral(), 2496 getCanonicalType(Arg.getIntegralType())); 2497 2498 case TemplateArgument::Type: 2499 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2500 2501 case TemplateArgument::Pack: { 2502 // FIXME: Allocate in ASTContext 2503 TemplateArgument *CanonArgs = new TemplateArgument[Arg.pack_size()]; 2504 unsigned Idx = 0; 2505 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2506 AEnd = Arg.pack_end(); 2507 A != AEnd; (void)++A, ++Idx) 2508 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2509 2510 TemplateArgument Result; 2511 Result.setArgumentPack(CanonArgs, Arg.pack_size(), false); 2512 return Result; 2513 } 2514 } 2515 2516 // Silence GCC warning 2517 assert(false && "Unhandled template argument kind"); 2518 return TemplateArgument(); 2519} 2520 2521NestedNameSpecifier * 2522ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2523 if (!NNS) 2524 return 0; 2525 2526 switch (NNS->getKind()) { 2527 case NestedNameSpecifier::Identifier: 2528 // Canonicalize the prefix but keep the identifier the same. 2529 return NestedNameSpecifier::Create(*this, 2530 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2531 NNS->getAsIdentifier()); 2532 2533 case NestedNameSpecifier::Namespace: 2534 // A namespace is canonical; build a nested-name-specifier with 2535 // this namespace and no prefix. 2536 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2537 2538 case NestedNameSpecifier::TypeSpec: 2539 case NestedNameSpecifier::TypeSpecWithTemplate: { 2540 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2541 return NestedNameSpecifier::Create(*this, 0, 2542 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2543 T.getTypePtr()); 2544 } 2545 2546 case NestedNameSpecifier::Global: 2547 // The global specifier is canonical and unique. 2548 return NNS; 2549 } 2550 2551 // Required to silence a GCC warning 2552 return 0; 2553} 2554 2555 2556const ArrayType *ASTContext::getAsArrayType(QualType T) { 2557 // Handle the non-qualified case efficiently. 2558 if (!T.hasLocalQualifiers()) { 2559 // Handle the common positive case fast. 2560 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2561 return AT; 2562 } 2563 2564 // Handle the common negative case fast. 2565 QualType CType = T->getCanonicalTypeInternal(); 2566 if (!isa<ArrayType>(CType)) 2567 return 0; 2568 2569 // Apply any qualifiers from the array type to the element type. This 2570 // implements C99 6.7.3p8: "If the specification of an array type includes 2571 // any type qualifiers, the element type is so qualified, not the array type." 2572 2573 // If we get here, we either have type qualifiers on the type, or we have 2574 // sugar such as a typedef in the way. If we have type qualifiers on the type 2575 // we must propagate them down into the element type. 2576 2577 QualifierCollector Qs; 2578 const Type *Ty = Qs.strip(T.getDesugaredType()); 2579 2580 // If we have a simple case, just return now. 2581 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2582 if (ATy == 0 || Qs.empty()) 2583 return ATy; 2584 2585 // Otherwise, we have an array and we have qualifiers on it. Push the 2586 // qualifiers into the array element type and return a new array type. 2587 // Get the canonical version of the element with the extra qualifiers on it. 2588 // This can recursively sink qualifiers through multiple levels of arrays. 2589 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2590 2591 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2592 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2593 CAT->getSizeModifier(), 2594 CAT->getIndexTypeCVRQualifiers())); 2595 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2596 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2597 IAT->getSizeModifier(), 2598 IAT->getIndexTypeCVRQualifiers())); 2599 2600 if (const DependentSizedArrayType *DSAT 2601 = dyn_cast<DependentSizedArrayType>(ATy)) 2602 return cast<ArrayType>( 2603 getDependentSizedArrayType(NewEltTy, 2604 DSAT->getSizeExpr() ? 2605 DSAT->getSizeExpr()->Retain() : 0, 2606 DSAT->getSizeModifier(), 2607 DSAT->getIndexTypeCVRQualifiers(), 2608 DSAT->getBracketsRange())); 2609 2610 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2611 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2612 VAT->getSizeExpr() ? 2613 VAT->getSizeExpr()->Retain() : 0, 2614 VAT->getSizeModifier(), 2615 VAT->getIndexTypeCVRQualifiers(), 2616 VAT->getBracketsRange())); 2617} 2618 2619 2620/// getArrayDecayedType - Return the properly qualified result of decaying the 2621/// specified array type to a pointer. This operation is non-trivial when 2622/// handling typedefs etc. The canonical type of "T" must be an array type, 2623/// this returns a pointer to a properly qualified element of the array. 2624/// 2625/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2626QualType ASTContext::getArrayDecayedType(QualType Ty) { 2627 // Get the element type with 'getAsArrayType' so that we don't lose any 2628 // typedefs in the element type of the array. This also handles propagation 2629 // of type qualifiers from the array type into the element type if present 2630 // (C99 6.7.3p8). 2631 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2632 assert(PrettyArrayType && "Not an array type!"); 2633 2634 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2635 2636 // int x[restrict 4] -> int *restrict 2637 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2638} 2639 2640QualType ASTContext::getBaseElementType(QualType QT) { 2641 QualifierCollector Qs; 2642 while (true) { 2643 const Type *UT = Qs.strip(QT); 2644 if (const ArrayType *AT = getAsArrayType(QualType(UT,0))) { 2645 QT = AT->getElementType(); 2646 } else { 2647 return Qs.apply(QT); 2648 } 2649 } 2650} 2651 2652QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2653 QualType ElemTy = AT->getElementType(); 2654 2655 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2656 return getBaseElementType(AT); 2657 2658 return ElemTy; 2659} 2660 2661/// getConstantArrayElementCount - Returns number of constant array elements. 2662uint64_t 2663ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2664 uint64_t ElementCount = 1; 2665 do { 2666 ElementCount *= CA->getSize().getZExtValue(); 2667 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2668 } while (CA); 2669 return ElementCount; 2670} 2671 2672/// getFloatingRank - Return a relative rank for floating point types. 2673/// This routine will assert if passed a built-in type that isn't a float. 2674static FloatingRank getFloatingRank(QualType T) { 2675 if (const ComplexType *CT = T->getAs<ComplexType>()) 2676 return getFloatingRank(CT->getElementType()); 2677 2678 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2679 switch (T->getAs<BuiltinType>()->getKind()) { 2680 default: assert(0 && "getFloatingRank(): not a floating type"); 2681 case BuiltinType::Float: return FloatRank; 2682 case BuiltinType::Double: return DoubleRank; 2683 case BuiltinType::LongDouble: return LongDoubleRank; 2684 } 2685} 2686 2687/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2688/// point or a complex type (based on typeDomain/typeSize). 2689/// 'typeDomain' is a real floating point or complex type. 2690/// 'typeSize' is a real floating point or complex type. 2691QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2692 QualType Domain) const { 2693 FloatingRank EltRank = getFloatingRank(Size); 2694 if (Domain->isComplexType()) { 2695 switch (EltRank) { 2696 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2697 case FloatRank: return FloatComplexTy; 2698 case DoubleRank: return DoubleComplexTy; 2699 case LongDoubleRank: return LongDoubleComplexTy; 2700 } 2701 } 2702 2703 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2704 switch (EltRank) { 2705 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2706 case FloatRank: return FloatTy; 2707 case DoubleRank: return DoubleTy; 2708 case LongDoubleRank: return LongDoubleTy; 2709 } 2710} 2711 2712/// getFloatingTypeOrder - Compare the rank of the two specified floating 2713/// point types, ignoring the domain of the type (i.e. 'double' == 2714/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2715/// LHS < RHS, return -1. 2716int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2717 FloatingRank LHSR = getFloatingRank(LHS); 2718 FloatingRank RHSR = getFloatingRank(RHS); 2719 2720 if (LHSR == RHSR) 2721 return 0; 2722 if (LHSR > RHSR) 2723 return 1; 2724 return -1; 2725} 2726 2727/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2728/// routine will assert if passed a built-in type that isn't an integer or enum, 2729/// or if it is not canonicalized. 2730unsigned ASTContext::getIntegerRank(Type *T) { 2731 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2732 if (EnumType* ET = dyn_cast<EnumType>(T)) 2733 T = ET->getDecl()->getPromotionType().getTypePtr(); 2734 2735 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2736 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2737 2738 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2739 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2740 2741 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2742 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2743 2744 switch (cast<BuiltinType>(T)->getKind()) { 2745 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2746 case BuiltinType::Bool: 2747 return 1 + (getIntWidth(BoolTy) << 3); 2748 case BuiltinType::Char_S: 2749 case BuiltinType::Char_U: 2750 case BuiltinType::SChar: 2751 case BuiltinType::UChar: 2752 return 2 + (getIntWidth(CharTy) << 3); 2753 case BuiltinType::Short: 2754 case BuiltinType::UShort: 2755 return 3 + (getIntWidth(ShortTy) << 3); 2756 case BuiltinType::Int: 2757 case BuiltinType::UInt: 2758 return 4 + (getIntWidth(IntTy) << 3); 2759 case BuiltinType::Long: 2760 case BuiltinType::ULong: 2761 return 5 + (getIntWidth(LongTy) << 3); 2762 case BuiltinType::LongLong: 2763 case BuiltinType::ULongLong: 2764 return 6 + (getIntWidth(LongLongTy) << 3); 2765 case BuiltinType::Int128: 2766 case BuiltinType::UInt128: 2767 return 7 + (getIntWidth(Int128Ty) << 3); 2768 } 2769} 2770 2771/// \brief Whether this is a promotable bitfield reference according 2772/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 2773/// 2774/// \returns the type this bit-field will promote to, or NULL if no 2775/// promotion occurs. 2776QualType ASTContext::isPromotableBitField(Expr *E) { 2777 FieldDecl *Field = E->getBitField(); 2778 if (!Field) 2779 return QualType(); 2780 2781 QualType FT = Field->getType(); 2782 2783 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 2784 uint64_t BitWidth = BitWidthAP.getZExtValue(); 2785 uint64_t IntSize = getTypeSize(IntTy); 2786 // GCC extension compatibility: if the bit-field size is less than or equal 2787 // to the size of int, it gets promoted no matter what its type is. 2788 // For instance, unsigned long bf : 4 gets promoted to signed int. 2789 if (BitWidth < IntSize) 2790 return IntTy; 2791 2792 if (BitWidth == IntSize) 2793 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 2794 2795 // Types bigger than int are not subject to promotions, and therefore act 2796 // like the base type. 2797 // FIXME: This doesn't quite match what gcc does, but what gcc does here 2798 // is ridiculous. 2799 return QualType(); 2800} 2801 2802/// getPromotedIntegerType - Returns the type that Promotable will 2803/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 2804/// integer type. 2805QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 2806 assert(!Promotable.isNull()); 2807 assert(Promotable->isPromotableIntegerType()); 2808 if (const EnumType *ET = Promotable->getAs<EnumType>()) 2809 return ET->getDecl()->getPromotionType(); 2810 if (Promotable->isSignedIntegerType()) 2811 return IntTy; 2812 uint64_t PromotableSize = getTypeSize(Promotable); 2813 uint64_t IntSize = getTypeSize(IntTy); 2814 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 2815 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 2816} 2817 2818/// getIntegerTypeOrder - Returns the highest ranked integer type: 2819/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2820/// LHS < RHS, return -1. 2821int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2822 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2823 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2824 if (LHSC == RHSC) return 0; 2825 2826 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2827 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2828 2829 unsigned LHSRank = getIntegerRank(LHSC); 2830 unsigned RHSRank = getIntegerRank(RHSC); 2831 2832 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2833 if (LHSRank == RHSRank) return 0; 2834 return LHSRank > RHSRank ? 1 : -1; 2835 } 2836 2837 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2838 if (LHSUnsigned) { 2839 // If the unsigned [LHS] type is larger, return it. 2840 if (LHSRank >= RHSRank) 2841 return 1; 2842 2843 // If the signed type can represent all values of the unsigned type, it 2844 // wins. Because we are dealing with 2's complement and types that are 2845 // powers of two larger than each other, this is always safe. 2846 return -1; 2847 } 2848 2849 // If the unsigned [RHS] type is larger, return it. 2850 if (RHSRank >= LHSRank) 2851 return -1; 2852 2853 // If the signed type can represent all values of the unsigned type, it 2854 // wins. Because we are dealing with 2's complement and types that are 2855 // powers of two larger than each other, this is always safe. 2856 return 1; 2857} 2858 2859static RecordDecl * 2860CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 2861 SourceLocation L, IdentifierInfo *Id) { 2862 if (Ctx.getLangOptions().CPlusPlus) 2863 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 2864 else 2865 return RecordDecl::Create(Ctx, TK, DC, L, Id); 2866} 2867 2868// getCFConstantStringType - Return the type used for constant CFStrings. 2869QualType ASTContext::getCFConstantStringType() { 2870 if (!CFConstantStringTypeDecl) { 2871 CFConstantStringTypeDecl = 2872 CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2873 &Idents.get("NSConstantString")); 2874 CFConstantStringTypeDecl->startDefinition(); 2875 2876 QualType FieldTypes[4]; 2877 2878 // const int *isa; 2879 FieldTypes[0] = getPointerType(IntTy.withConst()); 2880 // int flags; 2881 FieldTypes[1] = IntTy; 2882 // const char *str; 2883 FieldTypes[2] = getPointerType(CharTy.withConst()); 2884 // long length; 2885 FieldTypes[3] = LongTy; 2886 2887 // Create fields 2888 for (unsigned i = 0; i < 4; ++i) { 2889 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2890 SourceLocation(), 0, 2891 FieldTypes[i], /*TInfo=*/0, 2892 /*BitWidth=*/0, 2893 /*Mutable=*/false); 2894 CFConstantStringTypeDecl->addDecl(Field); 2895 } 2896 2897 CFConstantStringTypeDecl->completeDefinition(); 2898 } 2899 2900 return getTagDeclType(CFConstantStringTypeDecl); 2901} 2902 2903void ASTContext::setCFConstantStringType(QualType T) { 2904 const RecordType *Rec = T->getAs<RecordType>(); 2905 assert(Rec && "Invalid CFConstantStringType"); 2906 CFConstantStringTypeDecl = Rec->getDecl(); 2907} 2908 2909QualType ASTContext::getObjCFastEnumerationStateType() { 2910 if (!ObjCFastEnumerationStateTypeDecl) { 2911 ObjCFastEnumerationStateTypeDecl = 2912 CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2913 &Idents.get("__objcFastEnumerationState")); 2914 ObjCFastEnumerationStateTypeDecl->startDefinition(); 2915 2916 QualType FieldTypes[] = { 2917 UnsignedLongTy, 2918 getPointerType(ObjCIdTypedefType), 2919 getPointerType(UnsignedLongTy), 2920 getConstantArrayType(UnsignedLongTy, 2921 llvm::APInt(32, 5), ArrayType::Normal, 0) 2922 }; 2923 2924 for (size_t i = 0; i < 4; ++i) { 2925 FieldDecl *Field = FieldDecl::Create(*this, 2926 ObjCFastEnumerationStateTypeDecl, 2927 SourceLocation(), 0, 2928 FieldTypes[i], /*TInfo=*/0, 2929 /*BitWidth=*/0, 2930 /*Mutable=*/false); 2931 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 2932 } 2933 2934 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 2935 } 2936 2937 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 2938} 2939 2940QualType ASTContext::getBlockDescriptorType() { 2941 if (BlockDescriptorType) 2942 return getTagDeclType(BlockDescriptorType); 2943 2944 RecordDecl *T; 2945 // FIXME: Needs the FlagAppleBlock bit. 2946 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2947 &Idents.get("__block_descriptor")); 2948 T->startDefinition(); 2949 2950 QualType FieldTypes[] = { 2951 UnsignedLongTy, 2952 UnsignedLongTy, 2953 }; 2954 2955 const char *FieldNames[] = { 2956 "reserved", 2957 "Size" 2958 }; 2959 2960 for (size_t i = 0; i < 2; ++i) { 2961 FieldDecl *Field = FieldDecl::Create(*this, 2962 T, 2963 SourceLocation(), 2964 &Idents.get(FieldNames[i]), 2965 FieldTypes[i], /*TInfo=*/0, 2966 /*BitWidth=*/0, 2967 /*Mutable=*/false); 2968 T->addDecl(Field); 2969 } 2970 2971 T->completeDefinition(); 2972 2973 BlockDescriptorType = T; 2974 2975 return getTagDeclType(BlockDescriptorType); 2976} 2977 2978void ASTContext::setBlockDescriptorType(QualType T) { 2979 const RecordType *Rec = T->getAs<RecordType>(); 2980 assert(Rec && "Invalid BlockDescriptorType"); 2981 BlockDescriptorType = Rec->getDecl(); 2982} 2983 2984QualType ASTContext::getBlockDescriptorExtendedType() { 2985 if (BlockDescriptorExtendedType) 2986 return getTagDeclType(BlockDescriptorExtendedType); 2987 2988 RecordDecl *T; 2989 // FIXME: Needs the FlagAppleBlock bit. 2990 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2991 &Idents.get("__block_descriptor_withcopydispose")); 2992 T->startDefinition(); 2993 2994 QualType FieldTypes[] = { 2995 UnsignedLongTy, 2996 UnsignedLongTy, 2997 getPointerType(VoidPtrTy), 2998 getPointerType(VoidPtrTy) 2999 }; 3000 3001 const char *FieldNames[] = { 3002 "reserved", 3003 "Size", 3004 "CopyFuncPtr", 3005 "DestroyFuncPtr" 3006 }; 3007 3008 for (size_t i = 0; i < 4; ++i) { 3009 FieldDecl *Field = FieldDecl::Create(*this, 3010 T, 3011 SourceLocation(), 3012 &Idents.get(FieldNames[i]), 3013 FieldTypes[i], /*TInfo=*/0, 3014 /*BitWidth=*/0, 3015 /*Mutable=*/false); 3016 T->addDecl(Field); 3017 } 3018 3019 T->completeDefinition(); 3020 3021 BlockDescriptorExtendedType = T; 3022 3023 return getTagDeclType(BlockDescriptorExtendedType); 3024} 3025 3026void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3027 const RecordType *Rec = T->getAs<RecordType>(); 3028 assert(Rec && "Invalid BlockDescriptorType"); 3029 BlockDescriptorExtendedType = Rec->getDecl(); 3030} 3031 3032bool ASTContext::BlockRequiresCopying(QualType Ty) { 3033 if (Ty->isBlockPointerType()) 3034 return true; 3035 if (isObjCNSObjectType(Ty)) 3036 return true; 3037 if (Ty->isObjCObjectPointerType()) 3038 return true; 3039 return false; 3040} 3041 3042QualType ASTContext::BuildByRefType(const char *DeclName, QualType Ty) { 3043 // type = struct __Block_byref_1_X { 3044 // void *__isa; 3045 // struct __Block_byref_1_X *__forwarding; 3046 // unsigned int __flags; 3047 // unsigned int __size; 3048 // void *__copy_helper; // as needed 3049 // void *__destroy_help // as needed 3050 // int X; 3051 // } * 3052 3053 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3054 3055 // FIXME: Move up 3056 static unsigned int UniqueBlockByRefTypeID = 0; 3057 llvm::SmallString<36> Name; 3058 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3059 ++UniqueBlockByRefTypeID << '_' << DeclName; 3060 RecordDecl *T; 3061 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 3062 &Idents.get(Name.str())); 3063 T->startDefinition(); 3064 QualType Int32Ty = IntTy; 3065 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3066 QualType FieldTypes[] = { 3067 getPointerType(VoidPtrTy), 3068 getPointerType(getTagDeclType(T)), 3069 Int32Ty, 3070 Int32Ty, 3071 getPointerType(VoidPtrTy), 3072 getPointerType(VoidPtrTy), 3073 Ty 3074 }; 3075 3076 const char *FieldNames[] = { 3077 "__isa", 3078 "__forwarding", 3079 "__flags", 3080 "__size", 3081 "__copy_helper", 3082 "__destroy_helper", 3083 DeclName, 3084 }; 3085 3086 for (size_t i = 0; i < 7; ++i) { 3087 if (!HasCopyAndDispose && i >=4 && i <= 5) 3088 continue; 3089 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3090 &Idents.get(FieldNames[i]), 3091 FieldTypes[i], /*TInfo=*/0, 3092 /*BitWidth=*/0, /*Mutable=*/false); 3093 T->addDecl(Field); 3094 } 3095 3096 T->completeDefinition(); 3097 3098 return getPointerType(getTagDeclType(T)); 3099} 3100 3101 3102QualType ASTContext::getBlockParmType( 3103 bool BlockHasCopyDispose, 3104 llvm::SmallVector<const Expr *, 8> &BlockDeclRefDecls) { 3105 // FIXME: Move up 3106 static unsigned int UniqueBlockParmTypeID = 0; 3107 llvm::SmallString<36> Name; 3108 llvm::raw_svector_ostream(Name) << "__block_literal_" 3109 << ++UniqueBlockParmTypeID; 3110 RecordDecl *T; 3111 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 3112 &Idents.get(Name.str())); 3113 T->startDefinition(); 3114 QualType FieldTypes[] = { 3115 getPointerType(VoidPtrTy), 3116 IntTy, 3117 IntTy, 3118 getPointerType(VoidPtrTy), 3119 (BlockHasCopyDispose ? 3120 getPointerType(getBlockDescriptorExtendedType()) : 3121 getPointerType(getBlockDescriptorType())) 3122 }; 3123 3124 const char *FieldNames[] = { 3125 "__isa", 3126 "__flags", 3127 "__reserved", 3128 "__FuncPtr", 3129 "__descriptor" 3130 }; 3131 3132 for (size_t i = 0; i < 5; ++i) { 3133 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3134 &Idents.get(FieldNames[i]), 3135 FieldTypes[i], /*TInfo=*/0, 3136 /*BitWidth=*/0, /*Mutable=*/false); 3137 T->addDecl(Field); 3138 } 3139 3140 for (size_t i = 0; i < BlockDeclRefDecls.size(); ++i) { 3141 const Expr *E = BlockDeclRefDecls[i]; 3142 const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E); 3143 clang::IdentifierInfo *Name = 0; 3144 if (BDRE) { 3145 const ValueDecl *D = BDRE->getDecl(); 3146 Name = &Idents.get(D->getName()); 3147 } 3148 QualType FieldType = E->getType(); 3149 3150 if (BDRE && BDRE->isByRef()) 3151 FieldType = BuildByRefType(BDRE->getDecl()->getNameAsCString(), 3152 FieldType); 3153 3154 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3155 Name, FieldType, /*TInfo=*/0, 3156 /*BitWidth=*/0, /*Mutable=*/false); 3157 T->addDecl(Field); 3158 } 3159 3160 T->completeDefinition(); 3161 3162 return getPointerType(getTagDeclType(T)); 3163} 3164 3165void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3166 const RecordType *Rec = T->getAs<RecordType>(); 3167 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3168 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3169} 3170 3171// This returns true if a type has been typedefed to BOOL: 3172// typedef <type> BOOL; 3173static bool isTypeTypedefedAsBOOL(QualType T) { 3174 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3175 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3176 return II->isStr("BOOL"); 3177 3178 return false; 3179} 3180 3181/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3182/// purpose. 3183CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) { 3184 CharUnits sz = getTypeSizeInChars(type); 3185 3186 // Make all integer and enum types at least as large as an int 3187 if (sz.isPositive() && type->isIntegralType()) 3188 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3189 // Treat arrays as pointers, since that's how they're passed in. 3190 else if (type->isArrayType()) 3191 sz = getTypeSizeInChars(VoidPtrTy); 3192 return sz; 3193} 3194 3195static inline 3196std::string charUnitsToString(const CharUnits &CU) { 3197 return llvm::itostr(CU.getQuantity()); 3198} 3199 3200/// getObjCEncodingForBlockDecl - Return the encoded type for this block 3201/// declaration. 3202void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3203 std::string& S) { 3204 const BlockDecl *Decl = Expr->getBlockDecl(); 3205 QualType BlockTy = 3206 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3207 // Encode result type. 3208 getObjCEncodingForType(cast<FunctionType>(BlockTy)->getResultType(), S); 3209 // Compute size of all parameters. 3210 // Start with computing size of a pointer in number of bytes. 3211 // FIXME: There might(should) be a better way of doing this computation! 3212 SourceLocation Loc; 3213 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3214 CharUnits ParmOffset = PtrSize; 3215 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3216 E = Decl->param_end(); PI != E; ++PI) { 3217 QualType PType = (*PI)->getType(); 3218 CharUnits sz = getObjCEncodingTypeSize(PType); 3219 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3220 ParmOffset += sz; 3221 } 3222 // Size of the argument frame 3223 S += charUnitsToString(ParmOffset); 3224 // Block pointer and offset. 3225 S += "@?0"; 3226 ParmOffset = PtrSize; 3227 3228 // Argument types. 3229 ParmOffset = PtrSize; 3230 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3231 Decl->param_end(); PI != E; ++PI) { 3232 ParmVarDecl *PVDecl = *PI; 3233 QualType PType = PVDecl->getOriginalType(); 3234 if (const ArrayType *AT = 3235 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3236 // Use array's original type only if it has known number of 3237 // elements. 3238 if (!isa<ConstantArrayType>(AT)) 3239 PType = PVDecl->getType(); 3240 } else if (PType->isFunctionType()) 3241 PType = PVDecl->getType(); 3242 getObjCEncodingForType(PType, S); 3243 S += charUnitsToString(ParmOffset); 3244 ParmOffset += getObjCEncodingTypeSize(PType); 3245 } 3246} 3247 3248/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3249/// declaration. 3250void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3251 std::string& S) { 3252 // FIXME: This is not very efficient. 3253 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3254 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3255 // Encode result type. 3256 getObjCEncodingForType(Decl->getResultType(), S); 3257 // Compute size of all parameters. 3258 // Start with computing size of a pointer in number of bytes. 3259 // FIXME: There might(should) be a better way of doing this computation! 3260 SourceLocation Loc; 3261 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3262 // The first two arguments (self and _cmd) are pointers; account for 3263 // their size. 3264 CharUnits ParmOffset = 2 * PtrSize; 3265 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3266 E = Decl->sel_param_end(); PI != E; ++PI) { 3267 QualType PType = (*PI)->getType(); 3268 CharUnits sz = getObjCEncodingTypeSize(PType); 3269 assert (sz.isPositive() && 3270 "getObjCEncodingForMethodDecl - Incomplete param type"); 3271 ParmOffset += sz; 3272 } 3273 S += charUnitsToString(ParmOffset); 3274 S += "@0:"; 3275 S += charUnitsToString(PtrSize); 3276 3277 // Argument types. 3278 ParmOffset = 2 * PtrSize; 3279 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3280 E = Decl->sel_param_end(); PI != E; ++PI) { 3281 ParmVarDecl *PVDecl = *PI; 3282 QualType PType = PVDecl->getOriginalType(); 3283 if (const ArrayType *AT = 3284 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3285 // Use array's original type only if it has known number of 3286 // elements. 3287 if (!isa<ConstantArrayType>(AT)) 3288 PType = PVDecl->getType(); 3289 } else if (PType->isFunctionType()) 3290 PType = PVDecl->getType(); 3291 // Process argument qualifiers for user supplied arguments; such as, 3292 // 'in', 'inout', etc. 3293 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3294 getObjCEncodingForType(PType, S); 3295 S += charUnitsToString(ParmOffset); 3296 ParmOffset += getObjCEncodingTypeSize(PType); 3297 } 3298} 3299 3300/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3301/// property declaration. If non-NULL, Container must be either an 3302/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3303/// NULL when getting encodings for protocol properties. 3304/// Property attributes are stored as a comma-delimited C string. The simple 3305/// attributes readonly and bycopy are encoded as single characters. The 3306/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3307/// encoded as single characters, followed by an identifier. Property types 3308/// are also encoded as a parametrized attribute. The characters used to encode 3309/// these attributes are defined by the following enumeration: 3310/// @code 3311/// enum PropertyAttributes { 3312/// kPropertyReadOnly = 'R', // property is read-only. 3313/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3314/// kPropertyByref = '&', // property is a reference to the value last assigned 3315/// kPropertyDynamic = 'D', // property is dynamic 3316/// kPropertyGetter = 'G', // followed by getter selector name 3317/// kPropertySetter = 'S', // followed by setter selector name 3318/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3319/// kPropertyType = 't' // followed by old-style type encoding. 3320/// kPropertyWeak = 'W' // 'weak' property 3321/// kPropertyStrong = 'P' // property GC'able 3322/// kPropertyNonAtomic = 'N' // property non-atomic 3323/// }; 3324/// @endcode 3325void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3326 const Decl *Container, 3327 std::string& S) { 3328 // Collect information from the property implementation decl(s). 3329 bool Dynamic = false; 3330 ObjCPropertyImplDecl *SynthesizePID = 0; 3331 3332 // FIXME: Duplicated code due to poor abstraction. 3333 if (Container) { 3334 if (const ObjCCategoryImplDecl *CID = 3335 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3336 for (ObjCCategoryImplDecl::propimpl_iterator 3337 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3338 i != e; ++i) { 3339 ObjCPropertyImplDecl *PID = *i; 3340 if (PID->getPropertyDecl() == PD) { 3341 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3342 Dynamic = true; 3343 } else { 3344 SynthesizePID = PID; 3345 } 3346 } 3347 } 3348 } else { 3349 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3350 for (ObjCCategoryImplDecl::propimpl_iterator 3351 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3352 i != e; ++i) { 3353 ObjCPropertyImplDecl *PID = *i; 3354 if (PID->getPropertyDecl() == PD) { 3355 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3356 Dynamic = true; 3357 } else { 3358 SynthesizePID = PID; 3359 } 3360 } 3361 } 3362 } 3363 } 3364 3365 // FIXME: This is not very efficient. 3366 S = "T"; 3367 3368 // Encode result type. 3369 // GCC has some special rules regarding encoding of properties which 3370 // closely resembles encoding of ivars. 3371 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3372 true /* outermost type */, 3373 true /* encoding for property */); 3374 3375 if (PD->isReadOnly()) { 3376 S += ",R"; 3377 } else { 3378 switch (PD->getSetterKind()) { 3379 case ObjCPropertyDecl::Assign: break; 3380 case ObjCPropertyDecl::Copy: S += ",C"; break; 3381 case ObjCPropertyDecl::Retain: S += ",&"; break; 3382 } 3383 } 3384 3385 // It really isn't clear at all what this means, since properties 3386 // are "dynamic by default". 3387 if (Dynamic) 3388 S += ",D"; 3389 3390 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3391 S += ",N"; 3392 3393 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3394 S += ",G"; 3395 S += PD->getGetterName().getAsString(); 3396 } 3397 3398 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3399 S += ",S"; 3400 S += PD->getSetterName().getAsString(); 3401 } 3402 3403 if (SynthesizePID) { 3404 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3405 S += ",V"; 3406 S += OID->getNameAsString(); 3407 } 3408 3409 // FIXME: OBJCGC: weak & strong 3410} 3411 3412/// getLegacyIntegralTypeEncoding - 3413/// Another legacy compatibility encoding: 32-bit longs are encoded as 3414/// 'l' or 'L' , but not always. For typedefs, we need to use 3415/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3416/// 3417void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3418 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3419 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3420 if (BT->getKind() == BuiltinType::ULong && 3421 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3422 PointeeTy = UnsignedIntTy; 3423 else 3424 if (BT->getKind() == BuiltinType::Long && 3425 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3426 PointeeTy = IntTy; 3427 } 3428 } 3429} 3430 3431void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3432 const FieldDecl *Field) { 3433 // We follow the behavior of gcc, expanding structures which are 3434 // directly pointed to, and expanding embedded structures. Note that 3435 // these rules are sufficient to prevent recursive encoding of the 3436 // same type. 3437 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3438 true /* outermost type */); 3439} 3440 3441static void EncodeBitField(const ASTContext *Context, std::string& S, 3442 const FieldDecl *FD) { 3443 const Expr *E = FD->getBitWidth(); 3444 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3445 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3446 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3447 S += 'b'; 3448 S += llvm::utostr(N); 3449} 3450 3451// FIXME: Use SmallString for accumulating string. 3452void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3453 bool ExpandPointedToStructures, 3454 bool ExpandStructures, 3455 const FieldDecl *FD, 3456 bool OutermostType, 3457 bool EncodingProperty) { 3458 if (const BuiltinType *BT = T->getAs<BuiltinType>()) { 3459 if (FD && FD->isBitField()) 3460 return EncodeBitField(this, S, FD); 3461 char encoding; 3462 switch (BT->getKind()) { 3463 default: assert(0 && "Unhandled builtin type kind"); 3464 case BuiltinType::Void: encoding = 'v'; break; 3465 case BuiltinType::Bool: encoding = 'B'; break; 3466 case BuiltinType::Char_U: 3467 case BuiltinType::UChar: encoding = 'C'; break; 3468 case BuiltinType::UShort: encoding = 'S'; break; 3469 case BuiltinType::UInt: encoding = 'I'; break; 3470 case BuiltinType::ULong: 3471 encoding = 3472 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3473 break; 3474 case BuiltinType::UInt128: encoding = 'T'; break; 3475 case BuiltinType::ULongLong: encoding = 'Q'; break; 3476 case BuiltinType::Char_S: 3477 case BuiltinType::SChar: encoding = 'c'; break; 3478 case BuiltinType::Short: encoding = 's'; break; 3479 case BuiltinType::Int: encoding = 'i'; break; 3480 case BuiltinType::Long: 3481 encoding = 3482 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'l' : 'q'; 3483 break; 3484 case BuiltinType::LongLong: encoding = 'q'; break; 3485 case BuiltinType::Int128: encoding = 't'; break; 3486 case BuiltinType::Float: encoding = 'f'; break; 3487 case BuiltinType::Double: encoding = 'd'; break; 3488 case BuiltinType::LongDouble: encoding = 'd'; break; 3489 } 3490 3491 S += encoding; 3492 return; 3493 } 3494 3495 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3496 S += 'j'; 3497 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3498 false); 3499 return; 3500 } 3501 3502 // encoding for pointer or r3eference types. 3503 QualType PointeeTy; 3504 if (const PointerType *PT = T->getAs<PointerType>()) { 3505 if (PT->isObjCSelType()) { 3506 S += ':'; 3507 return; 3508 } 3509 PointeeTy = PT->getPointeeType(); 3510 } 3511 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3512 PointeeTy = RT->getPointeeType(); 3513 if (!PointeeTy.isNull()) { 3514 bool isReadOnly = false; 3515 // For historical/compatibility reasons, the read-only qualifier of the 3516 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3517 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3518 // Also, do not emit the 'r' for anything but the outermost type! 3519 if (isa<TypedefType>(T.getTypePtr())) { 3520 if (OutermostType && T.isConstQualified()) { 3521 isReadOnly = true; 3522 S += 'r'; 3523 } 3524 } else if (OutermostType) { 3525 QualType P = PointeeTy; 3526 while (P->getAs<PointerType>()) 3527 P = P->getAs<PointerType>()->getPointeeType(); 3528 if (P.isConstQualified()) { 3529 isReadOnly = true; 3530 S += 'r'; 3531 } 3532 } 3533 if (isReadOnly) { 3534 // Another legacy compatibility encoding. Some ObjC qualifier and type 3535 // combinations need to be rearranged. 3536 // Rewrite "in const" from "nr" to "rn" 3537 const char * s = S.c_str(); 3538 int len = S.length(); 3539 if (len >= 2 && s[len-2] == 'n' && s[len-1] == 'r') { 3540 std::string replace = "rn"; 3541 S.replace(S.end()-2, S.end(), replace); 3542 } 3543 } 3544 3545 if (PointeeTy->isCharType()) { 3546 // char pointer types should be encoded as '*' unless it is a 3547 // type that has been typedef'd to 'BOOL'. 3548 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3549 S += '*'; 3550 return; 3551 } 3552 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3553 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3554 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3555 S += '#'; 3556 return; 3557 } 3558 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3559 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3560 S += '@'; 3561 return; 3562 } 3563 // fall through... 3564 } 3565 S += '^'; 3566 getLegacyIntegralTypeEncoding(PointeeTy); 3567 3568 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3569 NULL); 3570 return; 3571 } 3572 3573 if (const ArrayType *AT = 3574 // Ignore type qualifiers etc. 3575 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3576 if (isa<IncompleteArrayType>(AT)) { 3577 // Incomplete arrays are encoded as a pointer to the array element. 3578 S += '^'; 3579 3580 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3581 false, ExpandStructures, FD); 3582 } else { 3583 S += '['; 3584 3585 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3586 S += llvm::utostr(CAT->getSize().getZExtValue()); 3587 else { 3588 //Variable length arrays are encoded as a regular array with 0 elements. 3589 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3590 S += '0'; 3591 } 3592 3593 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3594 false, ExpandStructures, FD); 3595 S += ']'; 3596 } 3597 return; 3598 } 3599 3600 if (T->getAs<FunctionType>()) { 3601 S += '?'; 3602 return; 3603 } 3604 3605 if (const RecordType *RTy = T->getAs<RecordType>()) { 3606 RecordDecl *RDecl = RTy->getDecl(); 3607 S += RDecl->isUnion() ? '(' : '{'; 3608 // Anonymous structures print as '?' 3609 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3610 S += II->getName(); 3611 } else { 3612 S += '?'; 3613 } 3614 if (ExpandStructures) { 3615 S += '='; 3616 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3617 FieldEnd = RDecl->field_end(); 3618 Field != FieldEnd; ++Field) { 3619 if (FD) { 3620 S += '"'; 3621 S += Field->getNameAsString(); 3622 S += '"'; 3623 } 3624 3625 // Special case bit-fields. 3626 if (Field->isBitField()) { 3627 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3628 (*Field)); 3629 } else { 3630 QualType qt = Field->getType(); 3631 getLegacyIntegralTypeEncoding(qt); 3632 getObjCEncodingForTypeImpl(qt, S, false, true, 3633 FD); 3634 } 3635 } 3636 } 3637 S += RDecl->isUnion() ? ')' : '}'; 3638 return; 3639 } 3640 3641 if (T->isEnumeralType()) { 3642 if (FD && FD->isBitField()) 3643 EncodeBitField(this, S, FD); 3644 else 3645 S += 'i'; 3646 return; 3647 } 3648 3649 if (T->isBlockPointerType()) { 3650 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3651 return; 3652 } 3653 3654 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3655 // @encode(class_name) 3656 ObjCInterfaceDecl *OI = OIT->getDecl(); 3657 S += '{'; 3658 const IdentifierInfo *II = OI->getIdentifier(); 3659 S += II->getName(); 3660 S += '='; 3661 llvm::SmallVector<FieldDecl*, 32> RecFields; 3662 CollectObjCIvars(OI, RecFields); 3663 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 3664 if (RecFields[i]->isBitField()) 3665 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3666 RecFields[i]); 3667 else 3668 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3669 FD); 3670 } 3671 S += '}'; 3672 return; 3673 } 3674 3675 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 3676 if (OPT->isObjCIdType()) { 3677 S += '@'; 3678 return; 3679 } 3680 3681 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 3682 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 3683 // Since this is a binary compatibility issue, need to consult with runtime 3684 // folks. Fortunately, this is a *very* obsure construct. 3685 S += '#'; 3686 return; 3687 } 3688 3689 if (OPT->isObjCQualifiedIdType()) { 3690 getObjCEncodingForTypeImpl(getObjCIdType(), S, 3691 ExpandPointedToStructures, 3692 ExpandStructures, FD); 3693 if (FD || EncodingProperty) { 3694 // Note that we do extended encoding of protocol qualifer list 3695 // Only when doing ivar or property encoding. 3696 S += '"'; 3697 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3698 E = OPT->qual_end(); I != E; ++I) { 3699 S += '<'; 3700 S += (*I)->getNameAsString(); 3701 S += '>'; 3702 } 3703 S += '"'; 3704 } 3705 return; 3706 } 3707 3708 QualType PointeeTy = OPT->getPointeeType(); 3709 if (!EncodingProperty && 3710 isa<TypedefType>(PointeeTy.getTypePtr())) { 3711 // Another historical/compatibility reason. 3712 // We encode the underlying type which comes out as 3713 // {...}; 3714 S += '^'; 3715 getObjCEncodingForTypeImpl(PointeeTy, S, 3716 false, ExpandPointedToStructures, 3717 NULL); 3718 return; 3719 } 3720 3721 S += '@'; 3722 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 3723 S += '"'; 3724 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 3725 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3726 E = OPT->qual_end(); I != E; ++I) { 3727 S += '<'; 3728 S += (*I)->getNameAsString(); 3729 S += '>'; 3730 } 3731 S += '"'; 3732 } 3733 return; 3734 } 3735 3736 assert(0 && "@encode for type not implemented!"); 3737} 3738 3739void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 3740 std::string& S) const { 3741 if (QT & Decl::OBJC_TQ_In) 3742 S += 'n'; 3743 if (QT & Decl::OBJC_TQ_Inout) 3744 S += 'N'; 3745 if (QT & Decl::OBJC_TQ_Out) 3746 S += 'o'; 3747 if (QT & Decl::OBJC_TQ_Bycopy) 3748 S += 'O'; 3749 if (QT & Decl::OBJC_TQ_Byref) 3750 S += 'R'; 3751 if (QT & Decl::OBJC_TQ_Oneway) 3752 S += 'V'; 3753} 3754 3755void ASTContext::setBuiltinVaListType(QualType T) { 3756 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 3757 3758 BuiltinVaListType = T; 3759} 3760 3761void ASTContext::setObjCIdType(QualType T) { 3762 ObjCIdTypedefType = T; 3763} 3764 3765void ASTContext::setObjCSelType(QualType T) { 3766 ObjCSelTypedefType = T; 3767} 3768 3769void ASTContext::setObjCProtoType(QualType QT) { 3770 ObjCProtoType = QT; 3771} 3772 3773void ASTContext::setObjCClassType(QualType T) { 3774 ObjCClassTypedefType = T; 3775} 3776 3777void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 3778 assert(ObjCConstantStringType.isNull() && 3779 "'NSConstantString' type already set!"); 3780 3781 ObjCConstantStringType = getObjCInterfaceType(Decl); 3782} 3783 3784/// \brief Retrieve the template name that corresponds to a non-empty 3785/// lookup. 3786TemplateName ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 3787 UnresolvedSetIterator End) { 3788 unsigned size = End - Begin; 3789 assert(size > 1 && "set is not overloaded!"); 3790 3791 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 3792 size * sizeof(FunctionTemplateDecl*)); 3793 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 3794 3795 NamedDecl **Storage = OT->getStorage(); 3796 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 3797 NamedDecl *D = *I; 3798 assert(isa<FunctionTemplateDecl>(D) || 3799 (isa<UsingShadowDecl>(D) && 3800 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 3801 *Storage++ = D; 3802 } 3803 3804 return TemplateName(OT); 3805} 3806 3807/// \brief Retrieve the template name that represents a qualified 3808/// template name such as \c std::vector. 3809TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 3810 bool TemplateKeyword, 3811 TemplateDecl *Template) { 3812 // FIXME: Canonicalization? 3813 llvm::FoldingSetNodeID ID; 3814 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 3815 3816 void *InsertPos = 0; 3817 QualifiedTemplateName *QTN = 3818 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3819 if (!QTN) { 3820 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 3821 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 3822 } 3823 3824 return TemplateName(QTN); 3825} 3826 3827/// \brief Retrieve the template name that represents a dependent 3828/// template name such as \c MetaFun::template apply. 3829TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3830 const IdentifierInfo *Name) { 3831 assert((!NNS || NNS->isDependent()) && 3832 "Nested name specifier must be dependent"); 3833 3834 llvm::FoldingSetNodeID ID; 3835 DependentTemplateName::Profile(ID, NNS, Name); 3836 3837 void *InsertPos = 0; 3838 DependentTemplateName *QTN = 3839 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3840 3841 if (QTN) 3842 return TemplateName(QTN); 3843 3844 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3845 if (CanonNNS == NNS) { 3846 QTN = new (*this,4) DependentTemplateName(NNS, Name); 3847 } else { 3848 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 3849 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 3850 DependentTemplateName *CheckQTN = 3851 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3852 assert(!CheckQTN && "Dependent type name canonicalization broken"); 3853 (void)CheckQTN; 3854 } 3855 3856 DependentTemplateNames.InsertNode(QTN, InsertPos); 3857 return TemplateName(QTN); 3858} 3859 3860/// \brief Retrieve the template name that represents a dependent 3861/// template name such as \c MetaFun::template operator+. 3862TemplateName 3863ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3864 OverloadedOperatorKind Operator) { 3865 assert((!NNS || NNS->isDependent()) && 3866 "Nested name specifier must be dependent"); 3867 3868 llvm::FoldingSetNodeID ID; 3869 DependentTemplateName::Profile(ID, NNS, Operator); 3870 3871 void *InsertPos = 0; 3872 DependentTemplateName *QTN 3873 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3874 3875 if (QTN) 3876 return TemplateName(QTN); 3877 3878 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3879 if (CanonNNS == NNS) { 3880 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 3881 } else { 3882 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 3883 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 3884 3885 DependentTemplateName *CheckQTN 3886 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3887 assert(!CheckQTN && "Dependent template name canonicalization broken"); 3888 (void)CheckQTN; 3889 } 3890 3891 DependentTemplateNames.InsertNode(QTN, InsertPos); 3892 return TemplateName(QTN); 3893} 3894 3895/// getFromTargetType - Given one of the integer types provided by 3896/// TargetInfo, produce the corresponding type. The unsigned @p Type 3897/// is actually a value of type @c TargetInfo::IntType. 3898CanQualType ASTContext::getFromTargetType(unsigned Type) const { 3899 switch (Type) { 3900 case TargetInfo::NoInt: return CanQualType(); 3901 case TargetInfo::SignedShort: return ShortTy; 3902 case TargetInfo::UnsignedShort: return UnsignedShortTy; 3903 case TargetInfo::SignedInt: return IntTy; 3904 case TargetInfo::UnsignedInt: return UnsignedIntTy; 3905 case TargetInfo::SignedLong: return LongTy; 3906 case TargetInfo::UnsignedLong: return UnsignedLongTy; 3907 case TargetInfo::SignedLongLong: return LongLongTy; 3908 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 3909 } 3910 3911 assert(false && "Unhandled TargetInfo::IntType value"); 3912 return CanQualType(); 3913} 3914 3915//===----------------------------------------------------------------------===// 3916// Type Predicates. 3917//===----------------------------------------------------------------------===// 3918 3919/// isObjCNSObjectType - Return true if this is an NSObject object using 3920/// NSObject attribute on a c-style pointer type. 3921/// FIXME - Make it work directly on types. 3922/// FIXME: Move to Type. 3923/// 3924bool ASTContext::isObjCNSObjectType(QualType Ty) const { 3925 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 3926 if (TypedefDecl *TD = TDT->getDecl()) 3927 if (TD->getAttr<ObjCNSObjectAttr>()) 3928 return true; 3929 } 3930 return false; 3931} 3932 3933/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 3934/// garbage collection attribute. 3935/// 3936Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 3937 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 3938 if (getLangOptions().ObjC1 && 3939 getLangOptions().getGCMode() != LangOptions::NonGC) { 3940 GCAttrs = Ty.getObjCGCAttr(); 3941 // Default behavious under objective-c's gc is for objective-c pointers 3942 // (or pointers to them) be treated as though they were declared 3943 // as __strong. 3944 if (GCAttrs == Qualifiers::GCNone) { 3945 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 3946 GCAttrs = Qualifiers::Strong; 3947 else if (Ty->isPointerType()) 3948 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 3949 } 3950 // Non-pointers have none gc'able attribute regardless of the attribute 3951 // set on them. 3952 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 3953 return Qualifiers::GCNone; 3954 } 3955 return GCAttrs; 3956} 3957 3958//===----------------------------------------------------------------------===// 3959// Type Compatibility Testing 3960//===----------------------------------------------------------------------===// 3961 3962/// areCompatVectorTypes - Return true if the two specified vector types are 3963/// compatible. 3964static bool areCompatVectorTypes(const VectorType *LHS, 3965 const VectorType *RHS) { 3966 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 3967 return LHS->getElementType() == RHS->getElementType() && 3968 LHS->getNumElements() == RHS->getNumElements(); 3969} 3970 3971//===----------------------------------------------------------------------===// 3972// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 3973//===----------------------------------------------------------------------===// 3974 3975/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 3976/// inheritance hierarchy of 'rProto'. 3977bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 3978 ObjCProtocolDecl *rProto) { 3979 if (lProto == rProto) 3980 return true; 3981 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 3982 E = rProto->protocol_end(); PI != E; ++PI) 3983 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 3984 return true; 3985 return false; 3986} 3987 3988/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 3989/// return true if lhs's protocols conform to rhs's protocol; false 3990/// otherwise. 3991bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 3992 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 3993 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 3994 return false; 3995} 3996 3997/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 3998/// ObjCQualifiedIDType. 3999bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4000 bool compare) { 4001 // Allow id<P..> and an 'id' or void* type in all cases. 4002 if (lhs->isVoidPointerType() || 4003 lhs->isObjCIdType() || lhs->isObjCClassType()) 4004 return true; 4005 else if (rhs->isVoidPointerType() || 4006 rhs->isObjCIdType() || rhs->isObjCClassType()) 4007 return true; 4008 4009 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4010 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4011 4012 if (!rhsOPT) return false; 4013 4014 if (rhsOPT->qual_empty()) { 4015 // If the RHS is a unqualified interface pointer "NSString*", 4016 // make sure we check the class hierarchy. 4017 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4018 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4019 E = lhsQID->qual_end(); I != E; ++I) { 4020 // when comparing an id<P> on lhs with a static type on rhs, 4021 // see if static class implements all of id's protocols, directly or 4022 // through its super class and categories. 4023 if (!rhsID->ClassImplementsProtocol(*I, true)) 4024 return false; 4025 } 4026 } 4027 // If there are no qualifiers and no interface, we have an 'id'. 4028 return true; 4029 } 4030 // Both the right and left sides have qualifiers. 4031 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4032 E = lhsQID->qual_end(); I != E; ++I) { 4033 ObjCProtocolDecl *lhsProto = *I; 4034 bool match = false; 4035 4036 // when comparing an id<P> on lhs with a static type on rhs, 4037 // see if static class implements all of id's protocols, directly or 4038 // through its super class and categories. 4039 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4040 E = rhsOPT->qual_end(); J != E; ++J) { 4041 ObjCProtocolDecl *rhsProto = *J; 4042 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4043 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4044 match = true; 4045 break; 4046 } 4047 } 4048 // If the RHS is a qualified interface pointer "NSString<P>*", 4049 // make sure we check the class hierarchy. 4050 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4051 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4052 E = lhsQID->qual_end(); I != E; ++I) { 4053 // when comparing an id<P> on lhs with a static type on rhs, 4054 // see if static class implements all of id's protocols, directly or 4055 // through its super class and categories. 4056 if (rhsID->ClassImplementsProtocol(*I, true)) { 4057 match = true; 4058 break; 4059 } 4060 } 4061 } 4062 if (!match) 4063 return false; 4064 } 4065 4066 return true; 4067 } 4068 4069 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4070 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4071 4072 if (const ObjCObjectPointerType *lhsOPT = 4073 lhs->getAsObjCInterfacePointerType()) { 4074 if (lhsOPT->qual_empty()) { 4075 bool match = false; 4076 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4077 for (ObjCObjectPointerType::qual_iterator I = rhsQID->qual_begin(), 4078 E = rhsQID->qual_end(); I != E; ++I) { 4079 // when comparing an id<P> on lhs with a static type on rhs, 4080 // see if static class implements all of id's protocols, directly or 4081 // through its super class and categories. 4082 if (lhsID->ClassImplementsProtocol(*I, true)) { 4083 match = true; 4084 break; 4085 } 4086 } 4087 if (!match) 4088 return false; 4089 } 4090 return true; 4091 } 4092 // Both the right and left sides have qualifiers. 4093 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4094 E = lhsOPT->qual_end(); I != E; ++I) { 4095 ObjCProtocolDecl *lhsProto = *I; 4096 bool match = false; 4097 4098 // when comparing an id<P> on lhs with a static type on rhs, 4099 // see if static class implements all of id's protocols, directly or 4100 // through its super class and categories. 4101 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4102 E = rhsQID->qual_end(); J != E; ++J) { 4103 ObjCProtocolDecl *rhsProto = *J; 4104 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4105 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4106 match = true; 4107 break; 4108 } 4109 } 4110 if (!match) 4111 return false; 4112 } 4113 return true; 4114 } 4115 return false; 4116} 4117 4118/// canAssignObjCInterfaces - Return true if the two interface types are 4119/// compatible for assignment from RHS to LHS. This handles validation of any 4120/// protocol qualifiers on the LHS or RHS. 4121/// 4122bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4123 const ObjCObjectPointerType *RHSOPT) { 4124 // If either type represents the built-in 'id' or 'Class' types, return true. 4125 if (LHSOPT->isObjCBuiltinType() || RHSOPT->isObjCBuiltinType()) 4126 return true; 4127 4128 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4129 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4130 QualType(RHSOPT,0), 4131 false); 4132 4133 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4134 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4135 if (LHS && RHS) // We have 2 user-defined types. 4136 return canAssignObjCInterfaces(LHS, RHS); 4137 4138 return false; 4139} 4140 4141/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4142/// for providing type-safty for objective-c pointers used to pass/return 4143/// arguments in block literals. When passed as arguments, passing 'A*' where 4144/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4145/// not OK. For the return type, the opposite is not OK. 4146bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4147 const ObjCObjectPointerType *LHSOPT, 4148 const ObjCObjectPointerType *RHSOPT) { 4149 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4150 return true; 4151 4152 if (LHSOPT->isObjCBuiltinType()) { 4153 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4154 } 4155 4156 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4157 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4158 QualType(RHSOPT,0), 4159 false); 4160 4161 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4162 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4163 if (LHS && RHS) { // We have 2 user-defined types. 4164 if (LHS != RHS) { 4165 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4166 return false; 4167 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4168 return true; 4169 } 4170 else 4171 return true; 4172 } 4173 return false; 4174} 4175 4176/// getIntersectionOfProtocols - This routine finds the intersection of set 4177/// of protocols inherited from two distinct objective-c pointer objects. 4178/// It is used to build composite qualifier list of the composite type of 4179/// the conditional expression involving two objective-c pointer objects. 4180static 4181void getIntersectionOfProtocols(ASTContext &Context, 4182 const ObjCObjectPointerType *LHSOPT, 4183 const ObjCObjectPointerType *RHSOPT, 4184 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4185 4186 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4187 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4188 4189 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4190 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4191 if (LHSNumProtocols > 0) 4192 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4193 else { 4194 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4195 Context.CollectInheritedProtocols(LHS->getDecl(), LHSInheritedProtocols); 4196 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4197 LHSInheritedProtocols.end()); 4198 } 4199 4200 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4201 if (RHSNumProtocols > 0) { 4202 ObjCProtocolDecl **RHSProtocols = 4203 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4204 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4205 if (InheritedProtocolSet.count(RHSProtocols[i])) 4206 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4207 } 4208 else { 4209 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4210 Context.CollectInheritedProtocols(RHS->getDecl(), RHSInheritedProtocols); 4211 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4212 RHSInheritedProtocols.begin(), 4213 E = RHSInheritedProtocols.end(); I != E; ++I) 4214 if (InheritedProtocolSet.count((*I))) 4215 IntersectionOfProtocols.push_back((*I)); 4216 } 4217} 4218 4219/// areCommonBaseCompatible - Returns common base class of the two classes if 4220/// one found. Note that this is O'2 algorithm. But it will be called as the 4221/// last type comparison in a ?-exp of ObjC pointer types before a 4222/// warning is issued. So, its invokation is extremely rare. 4223QualType ASTContext::areCommonBaseCompatible( 4224 const ObjCObjectPointerType *LHSOPT, 4225 const ObjCObjectPointerType *RHSOPT) { 4226 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4227 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4228 if (!LHS || !RHS) 4229 return QualType(); 4230 4231 while (const ObjCInterfaceDecl *LHSIDecl = LHS->getDecl()->getSuperClass()) { 4232 QualType LHSTy = getObjCInterfaceType(LHSIDecl); 4233 LHS = LHSTy->getAs<ObjCInterfaceType>(); 4234 if (canAssignObjCInterfaces(LHS, RHS)) { 4235 llvm::SmallVector<ObjCProtocolDecl *, 8> IntersectionOfProtocols; 4236 getIntersectionOfProtocols(*this, 4237 LHSOPT, RHSOPT, IntersectionOfProtocols); 4238 if (IntersectionOfProtocols.empty()) 4239 LHSTy = getObjCObjectPointerType(LHSTy); 4240 else 4241 LHSTy = getObjCObjectPointerType(LHSTy, &IntersectionOfProtocols[0], 4242 IntersectionOfProtocols.size()); 4243 return LHSTy; 4244 } 4245 } 4246 4247 return QualType(); 4248} 4249 4250bool ASTContext::canAssignObjCInterfaces(const ObjCInterfaceType *LHS, 4251 const ObjCInterfaceType *RHS) { 4252 // Verify that the base decls are compatible: the RHS must be a subclass of 4253 // the LHS. 4254 if (!LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4255 return false; 4256 4257 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4258 // protocol qualified at all, then we are good. 4259 if (LHS->getNumProtocols() == 0) 4260 return true; 4261 4262 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4263 // isn't a superset. 4264 if (RHS->getNumProtocols() == 0) 4265 return true; // FIXME: should return false! 4266 4267 for (ObjCInterfaceType::qual_iterator LHSPI = LHS->qual_begin(), 4268 LHSPE = LHS->qual_end(); 4269 LHSPI != LHSPE; LHSPI++) { 4270 bool RHSImplementsProtocol = false; 4271 4272 // If the RHS doesn't implement the protocol on the left, the types 4273 // are incompatible. 4274 for (ObjCInterfaceType::qual_iterator RHSPI = RHS->qual_begin(), 4275 RHSPE = RHS->qual_end(); 4276 RHSPI != RHSPE; RHSPI++) { 4277 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4278 RHSImplementsProtocol = true; 4279 break; 4280 } 4281 } 4282 // FIXME: For better diagnostics, consider passing back the protocol name. 4283 if (!RHSImplementsProtocol) 4284 return false; 4285 } 4286 // The RHS implements all protocols listed on the LHS. 4287 return true; 4288} 4289 4290bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4291 // get the "pointed to" types 4292 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4293 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4294 4295 if (!LHSOPT || !RHSOPT) 4296 return false; 4297 4298 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4299 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4300} 4301 4302/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4303/// both shall have the identically qualified version of a compatible type. 4304/// C99 6.2.7p1: Two types have compatible types if their types are the 4305/// same. See 6.7.[2,3,5] for additional rules. 4306bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 4307 if (getLangOptions().CPlusPlus) 4308 return hasSameType(LHS, RHS); 4309 4310 return !mergeTypes(LHS, RHS).isNull(); 4311} 4312 4313bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 4314 return !mergeTypes(LHS, RHS, true).isNull(); 4315} 4316 4317QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 4318 bool OfBlockPointer) { 4319 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4320 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4321 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4322 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4323 bool allLTypes = true; 4324 bool allRTypes = true; 4325 4326 // Check return type 4327 QualType retType; 4328 if (OfBlockPointer) 4329 retType = mergeTypes(rbase->getResultType(), lbase->getResultType(), true); 4330 else 4331 retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 4332 if (retType.isNull()) return QualType(); 4333 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 4334 allLTypes = false; 4335 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 4336 allRTypes = false; 4337 // FIXME: double check this 4338 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 4339 // rbase->getRegParmAttr() != 0 && 4340 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 4341 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 4342 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 4343 unsigned RegParm = lbaseInfo.getRegParm() == 0 ? rbaseInfo.getRegParm() : 4344 lbaseInfo.getRegParm(); 4345 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 4346 if (NoReturn != lbaseInfo.getNoReturn() || 4347 RegParm != lbaseInfo.getRegParm()) 4348 allLTypes = false; 4349 if (NoReturn != rbaseInfo.getNoReturn() || 4350 RegParm != rbaseInfo.getRegParm()) 4351 allRTypes = false; 4352 CallingConv lcc = lbaseInfo.getCC(); 4353 CallingConv rcc = rbaseInfo.getCC(); 4354 // Compatible functions must have compatible calling conventions 4355 if (!isSameCallConv(lcc, rcc)) 4356 return QualType(); 4357 4358 if (lproto && rproto) { // two C99 style function prototypes 4359 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4360 "C++ shouldn't be here"); 4361 unsigned lproto_nargs = lproto->getNumArgs(); 4362 unsigned rproto_nargs = rproto->getNumArgs(); 4363 4364 // Compatible functions must have the same number of arguments 4365 if (lproto_nargs != rproto_nargs) 4366 return QualType(); 4367 4368 // Variadic and non-variadic functions aren't compatible 4369 if (lproto->isVariadic() != rproto->isVariadic()) 4370 return QualType(); 4371 4372 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4373 return QualType(); 4374 4375 // Check argument compatibility 4376 llvm::SmallVector<QualType, 10> types; 4377 for (unsigned i = 0; i < lproto_nargs; i++) { 4378 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4379 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4380 QualType argtype = mergeTypes(largtype, rargtype, OfBlockPointer); 4381 if (argtype.isNull()) return QualType(); 4382 types.push_back(argtype); 4383 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4384 allLTypes = false; 4385 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4386 allRTypes = false; 4387 } 4388 if (allLTypes) return lhs; 4389 if (allRTypes) return rhs; 4390 return getFunctionType(retType, types.begin(), types.size(), 4391 lproto->isVariadic(), lproto->getTypeQuals(), 4392 false, false, 0, 0, 4393 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4394 } 4395 4396 if (lproto) allRTypes = false; 4397 if (rproto) allLTypes = false; 4398 4399 const FunctionProtoType *proto = lproto ? lproto : rproto; 4400 if (proto) { 4401 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4402 if (proto->isVariadic()) return QualType(); 4403 // Check that the types are compatible with the types that 4404 // would result from default argument promotions (C99 6.7.5.3p15). 4405 // The only types actually affected are promotable integer 4406 // types and floats, which would be passed as a different 4407 // type depending on whether the prototype is visible. 4408 unsigned proto_nargs = proto->getNumArgs(); 4409 for (unsigned i = 0; i < proto_nargs; ++i) { 4410 QualType argTy = proto->getArgType(i); 4411 4412 // Look at the promotion type of enum types, since that is the type used 4413 // to pass enum values. 4414 if (const EnumType *Enum = argTy->getAs<EnumType>()) 4415 argTy = Enum->getDecl()->getPromotionType(); 4416 4417 if (argTy->isPromotableIntegerType() || 4418 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4419 return QualType(); 4420 } 4421 4422 if (allLTypes) return lhs; 4423 if (allRTypes) return rhs; 4424 return getFunctionType(retType, proto->arg_type_begin(), 4425 proto->getNumArgs(), proto->isVariadic(), 4426 proto->getTypeQuals(), 4427 false, false, 0, 0, 4428 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4429 } 4430 4431 if (allLTypes) return lhs; 4432 if (allRTypes) return rhs; 4433 FunctionType::ExtInfo Info(NoReturn, RegParm, lcc); 4434 return getFunctionNoProtoType(retType, Info); 4435} 4436 4437QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 4438 bool OfBlockPointer) { 4439 // C++ [expr]: If an expression initially has the type "reference to T", the 4440 // type is adjusted to "T" prior to any further analysis, the expression 4441 // designates the object or function denoted by the reference, and the 4442 // expression is an lvalue unless the reference is an rvalue reference and 4443 // the expression is a function call (possibly inside parentheses). 4444 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 4445 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 4446 4447 QualType LHSCan = getCanonicalType(LHS), 4448 RHSCan = getCanonicalType(RHS); 4449 4450 // If two types are identical, they are compatible. 4451 if (LHSCan == RHSCan) 4452 return LHS; 4453 4454 // If the qualifiers are different, the types aren't compatible... mostly. 4455 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4456 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4457 if (LQuals != RQuals) { 4458 // If any of these qualifiers are different, we have a type 4459 // mismatch. 4460 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4461 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4462 return QualType(); 4463 4464 // Exactly one GC qualifier difference is allowed: __strong is 4465 // okay if the other type has no GC qualifier but is an Objective 4466 // C object pointer (i.e. implicitly strong by default). We fix 4467 // this by pretending that the unqualified type was actually 4468 // qualified __strong. 4469 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4470 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4471 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4472 4473 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4474 return QualType(); 4475 4476 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4477 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4478 } 4479 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4480 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4481 } 4482 return QualType(); 4483 } 4484 4485 // Okay, qualifiers are equal. 4486 4487 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4488 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4489 4490 // We want to consider the two function types to be the same for these 4491 // comparisons, just force one to the other. 4492 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 4493 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 4494 4495 // Same as above for arrays 4496 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 4497 LHSClass = Type::ConstantArray; 4498 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 4499 RHSClass = Type::ConstantArray; 4500 4501 // Canonicalize ExtVector -> Vector. 4502 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 4503 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 4504 4505 // If the canonical type classes don't match. 4506 if (LHSClass != RHSClass) { 4507 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 4508 // a signed integer type, or an unsigned integer type. 4509 // Compatibility is based on the underlying type, not the promotion 4510 // type. 4511 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 4512 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 4513 return RHS; 4514 } 4515 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 4516 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 4517 return LHS; 4518 } 4519 4520 return QualType(); 4521 } 4522 4523 // The canonical type classes match. 4524 switch (LHSClass) { 4525#define TYPE(Class, Base) 4526#define ABSTRACT_TYPE(Class, Base) 4527#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 4528#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4529#define DEPENDENT_TYPE(Class, Base) case Type::Class: 4530#include "clang/AST/TypeNodes.def" 4531 assert(false && "Non-canonical and dependent types shouldn't get here"); 4532 return QualType(); 4533 4534 case Type::LValueReference: 4535 case Type::RValueReference: 4536 case Type::MemberPointer: 4537 assert(false && "C++ should never be in mergeTypes"); 4538 return QualType(); 4539 4540 case Type::IncompleteArray: 4541 case Type::VariableArray: 4542 case Type::FunctionProto: 4543 case Type::ExtVector: 4544 assert(false && "Types are eliminated above"); 4545 return QualType(); 4546 4547 case Type::Pointer: 4548 { 4549 // Merge two pointer types, while trying to preserve typedef info 4550 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 4551 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 4552 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 4553 if (ResultType.isNull()) return QualType(); 4554 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4555 return LHS; 4556 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4557 return RHS; 4558 return getPointerType(ResultType); 4559 } 4560 case Type::BlockPointer: 4561 { 4562 // Merge two block pointer types, while trying to preserve typedef info 4563 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 4564 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 4565 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer); 4566 if (ResultType.isNull()) return QualType(); 4567 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4568 return LHS; 4569 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4570 return RHS; 4571 return getBlockPointerType(ResultType); 4572 } 4573 case Type::ConstantArray: 4574 { 4575 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 4576 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 4577 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 4578 return QualType(); 4579 4580 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 4581 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 4582 QualType ResultType = mergeTypes(LHSElem, RHSElem); 4583 if (ResultType.isNull()) return QualType(); 4584 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4585 return LHS; 4586 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4587 return RHS; 4588 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 4589 ArrayType::ArraySizeModifier(), 0); 4590 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 4591 ArrayType::ArraySizeModifier(), 0); 4592 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 4593 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 4594 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4595 return LHS; 4596 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4597 return RHS; 4598 if (LVAT) { 4599 // FIXME: This isn't correct! But tricky to implement because 4600 // the array's size has to be the size of LHS, but the type 4601 // has to be different. 4602 return LHS; 4603 } 4604 if (RVAT) { 4605 // FIXME: This isn't correct! But tricky to implement because 4606 // the array's size has to be the size of RHS, but the type 4607 // has to be different. 4608 return RHS; 4609 } 4610 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 4611 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 4612 return getIncompleteArrayType(ResultType, 4613 ArrayType::ArraySizeModifier(), 0); 4614 } 4615 case Type::FunctionNoProto: 4616 return mergeFunctionTypes(LHS, RHS, OfBlockPointer); 4617 case Type::Record: 4618 case Type::Enum: 4619 return QualType(); 4620 case Type::Builtin: 4621 // Only exactly equal builtin types are compatible, which is tested above. 4622 return QualType(); 4623 case Type::Complex: 4624 // Distinct complex types are incompatible. 4625 return QualType(); 4626 case Type::Vector: 4627 // FIXME: The merged type should be an ExtVector! 4628 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 4629 RHSCan->getAs<VectorType>())) 4630 return LHS; 4631 return QualType(); 4632 case Type::ObjCInterface: { 4633 // Check if the interfaces are assignment compatible. 4634 // FIXME: This should be type compatibility, e.g. whether 4635 // "LHS x; RHS x;" at global scope is legal. 4636 const ObjCInterfaceType* LHSIface = LHS->getAs<ObjCInterfaceType>(); 4637 const ObjCInterfaceType* RHSIface = RHS->getAs<ObjCInterfaceType>(); 4638 if (LHSIface && RHSIface && 4639 canAssignObjCInterfaces(LHSIface, RHSIface)) 4640 return LHS; 4641 4642 return QualType(); 4643 } 4644 case Type::ObjCObjectPointer: { 4645 if (OfBlockPointer) { 4646 if (canAssignObjCInterfacesInBlockPointer( 4647 LHS->getAs<ObjCObjectPointerType>(), 4648 RHS->getAs<ObjCObjectPointerType>())) 4649 return LHS; 4650 return QualType(); 4651 } 4652 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 4653 RHS->getAs<ObjCObjectPointerType>())) 4654 return LHS; 4655 4656 return QualType(); 4657 } 4658 } 4659 4660 return QualType(); 4661} 4662 4663//===----------------------------------------------------------------------===// 4664// Integer Predicates 4665//===----------------------------------------------------------------------===// 4666 4667unsigned ASTContext::getIntWidth(QualType T) { 4668 if (T->isBooleanType()) 4669 return 1; 4670 if (EnumType *ET = dyn_cast<EnumType>(T)) 4671 T = ET->getDecl()->getIntegerType(); 4672 // For builtin types, just use the standard type sizing method 4673 return (unsigned)getTypeSize(T); 4674} 4675 4676QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 4677 assert(T->isSignedIntegerType() && "Unexpected type"); 4678 4679 // Turn <4 x signed int> -> <4 x unsigned int> 4680 if (const VectorType *VTy = T->getAs<VectorType>()) 4681 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 4682 VTy->getNumElements(), VTy->isAltiVec(), VTy->isPixel()); 4683 4684 // For enums, we return the unsigned version of the base type. 4685 if (const EnumType *ETy = T->getAs<EnumType>()) 4686 T = ETy->getDecl()->getIntegerType(); 4687 4688 const BuiltinType *BTy = T->getAs<BuiltinType>(); 4689 assert(BTy && "Unexpected signed integer type"); 4690 switch (BTy->getKind()) { 4691 case BuiltinType::Char_S: 4692 case BuiltinType::SChar: 4693 return UnsignedCharTy; 4694 case BuiltinType::Short: 4695 return UnsignedShortTy; 4696 case BuiltinType::Int: 4697 return UnsignedIntTy; 4698 case BuiltinType::Long: 4699 return UnsignedLongTy; 4700 case BuiltinType::LongLong: 4701 return UnsignedLongLongTy; 4702 case BuiltinType::Int128: 4703 return UnsignedInt128Ty; 4704 default: 4705 assert(0 && "Unexpected signed integer type"); 4706 return QualType(); 4707 } 4708} 4709 4710ExternalASTSource::~ExternalASTSource() { } 4711 4712void ExternalASTSource::PrintStats() { } 4713 4714 4715//===----------------------------------------------------------------------===// 4716// Builtin Type Computation 4717//===----------------------------------------------------------------------===// 4718 4719/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 4720/// pointer over the consumed characters. This returns the resultant type. 4721static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 4722 ASTContext::GetBuiltinTypeError &Error, 4723 bool AllowTypeModifiers = true) { 4724 // Modifiers. 4725 int HowLong = 0; 4726 bool Signed = false, Unsigned = false; 4727 4728 // Read the modifiers first. 4729 bool Done = false; 4730 while (!Done) { 4731 switch (*Str++) { 4732 default: Done = true; --Str; break; 4733 case 'S': 4734 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 4735 assert(!Signed && "Can't use 'S' modifier multiple times!"); 4736 Signed = true; 4737 break; 4738 case 'U': 4739 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 4740 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 4741 Unsigned = true; 4742 break; 4743 case 'L': 4744 assert(HowLong <= 2 && "Can't have LLLL modifier"); 4745 ++HowLong; 4746 break; 4747 } 4748 } 4749 4750 QualType Type; 4751 4752 // Read the base type. 4753 switch (*Str++) { 4754 default: assert(0 && "Unknown builtin type letter!"); 4755 case 'v': 4756 assert(HowLong == 0 && !Signed && !Unsigned && 4757 "Bad modifiers used with 'v'!"); 4758 Type = Context.VoidTy; 4759 break; 4760 case 'f': 4761 assert(HowLong == 0 && !Signed && !Unsigned && 4762 "Bad modifiers used with 'f'!"); 4763 Type = Context.FloatTy; 4764 break; 4765 case 'd': 4766 assert(HowLong < 2 && !Signed && !Unsigned && 4767 "Bad modifiers used with 'd'!"); 4768 if (HowLong) 4769 Type = Context.LongDoubleTy; 4770 else 4771 Type = Context.DoubleTy; 4772 break; 4773 case 's': 4774 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 4775 if (Unsigned) 4776 Type = Context.UnsignedShortTy; 4777 else 4778 Type = Context.ShortTy; 4779 break; 4780 case 'i': 4781 if (HowLong == 3) 4782 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 4783 else if (HowLong == 2) 4784 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 4785 else if (HowLong == 1) 4786 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 4787 else 4788 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 4789 break; 4790 case 'c': 4791 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 4792 if (Signed) 4793 Type = Context.SignedCharTy; 4794 else if (Unsigned) 4795 Type = Context.UnsignedCharTy; 4796 else 4797 Type = Context.CharTy; 4798 break; 4799 case 'b': // boolean 4800 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 4801 Type = Context.BoolTy; 4802 break; 4803 case 'z': // size_t. 4804 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 4805 Type = Context.getSizeType(); 4806 break; 4807 case 'F': 4808 Type = Context.getCFConstantStringType(); 4809 break; 4810 case 'a': 4811 Type = Context.getBuiltinVaListType(); 4812 assert(!Type.isNull() && "builtin va list type not initialized!"); 4813 break; 4814 case 'A': 4815 // This is a "reference" to a va_list; however, what exactly 4816 // this means depends on how va_list is defined. There are two 4817 // different kinds of va_list: ones passed by value, and ones 4818 // passed by reference. An example of a by-value va_list is 4819 // x86, where va_list is a char*. An example of by-ref va_list 4820 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 4821 // we want this argument to be a char*&; for x86-64, we want 4822 // it to be a __va_list_tag*. 4823 Type = Context.getBuiltinVaListType(); 4824 assert(!Type.isNull() && "builtin va list type not initialized!"); 4825 if (Type->isArrayType()) { 4826 Type = Context.getArrayDecayedType(Type); 4827 } else { 4828 Type = Context.getLValueReferenceType(Type); 4829 } 4830 break; 4831 case 'V': { 4832 char *End; 4833 unsigned NumElements = strtoul(Str, &End, 10); 4834 assert(End != Str && "Missing vector size"); 4835 4836 Str = End; 4837 4838 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4839 // FIXME: Don't know what to do about AltiVec. 4840 Type = Context.getVectorType(ElementType, NumElements, false, false); 4841 break; 4842 } 4843 case 'X': { 4844 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4845 Type = Context.getComplexType(ElementType); 4846 break; 4847 } 4848 case 'P': 4849 Type = Context.getFILEType(); 4850 if (Type.isNull()) { 4851 Error = ASTContext::GE_Missing_stdio; 4852 return QualType(); 4853 } 4854 break; 4855 case 'J': 4856 if (Signed) 4857 Type = Context.getsigjmp_bufType(); 4858 else 4859 Type = Context.getjmp_bufType(); 4860 4861 if (Type.isNull()) { 4862 Error = ASTContext::GE_Missing_setjmp; 4863 return QualType(); 4864 } 4865 break; 4866 } 4867 4868 if (!AllowTypeModifiers) 4869 return Type; 4870 4871 Done = false; 4872 while (!Done) { 4873 switch (char c = *Str++) { 4874 default: Done = true; --Str; break; 4875 case '*': 4876 case '&': 4877 { 4878 // Both pointers and references can have their pointee types 4879 // qualified with an address space. 4880 char *End; 4881 unsigned AddrSpace = strtoul(Str, &End, 10); 4882 if (End != Str && AddrSpace != 0) { 4883 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 4884 Str = End; 4885 } 4886 } 4887 if (c == '*') 4888 Type = Context.getPointerType(Type); 4889 else 4890 Type = Context.getLValueReferenceType(Type); 4891 break; 4892 // FIXME: There's no way to have a built-in with an rvalue ref arg. 4893 case 'C': 4894 Type = Type.withConst(); 4895 break; 4896 case 'D': 4897 Type = Context.getVolatileType(Type); 4898 break; 4899 } 4900 } 4901 4902 return Type; 4903} 4904 4905/// GetBuiltinType - Return the type for the specified builtin. 4906QualType ASTContext::GetBuiltinType(unsigned id, 4907 GetBuiltinTypeError &Error) { 4908 const char *TypeStr = BuiltinInfo.GetTypeString(id); 4909 4910 llvm::SmallVector<QualType, 8> ArgTypes; 4911 4912 Error = GE_None; 4913 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 4914 if (Error != GE_None) 4915 return QualType(); 4916 while (TypeStr[0] && TypeStr[0] != '.') { 4917 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 4918 if (Error != GE_None) 4919 return QualType(); 4920 4921 // Do array -> pointer decay. The builtin should use the decayed type. 4922 if (Ty->isArrayType()) 4923 Ty = getArrayDecayedType(Ty); 4924 4925 ArgTypes.push_back(Ty); 4926 } 4927 4928 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 4929 "'.' should only occur at end of builtin type list!"); 4930 4931 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 4932 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 4933 return getFunctionNoProtoType(ResType); 4934 4935 // FIXME: Should we create noreturn types? 4936 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 4937 TypeStr[0] == '.', 0, false, false, 0, 0, 4938 FunctionType::ExtInfo()); 4939} 4940 4941QualType 4942ASTContext::UsualArithmeticConversionsType(QualType lhs, QualType rhs) { 4943 // Perform the usual unary conversions. We do this early so that 4944 // integral promotions to "int" can allow us to exit early, in the 4945 // lhs == rhs check. Also, for conversion purposes, we ignore any 4946 // qualifiers. For example, "const float" and "float" are 4947 // equivalent. 4948 if (lhs->isPromotableIntegerType()) 4949 lhs = getPromotedIntegerType(lhs); 4950 else 4951 lhs = lhs.getUnqualifiedType(); 4952 if (rhs->isPromotableIntegerType()) 4953 rhs = getPromotedIntegerType(rhs); 4954 else 4955 rhs = rhs.getUnqualifiedType(); 4956 4957 // If both types are identical, no conversion is needed. 4958 if (lhs == rhs) 4959 return lhs; 4960 4961 // If either side is a non-arithmetic type (e.g. a pointer), we are done. 4962 // The caller can deal with this (e.g. pointer + int). 4963 if (!lhs->isArithmeticType() || !rhs->isArithmeticType()) 4964 return lhs; 4965 4966 // At this point, we have two different arithmetic types. 4967 4968 // Handle complex types first (C99 6.3.1.8p1). 4969 if (lhs->isComplexType() || rhs->isComplexType()) { 4970 // if we have an integer operand, the result is the complex type. 4971 if (rhs->isIntegerType() || rhs->isComplexIntegerType()) { 4972 // convert the rhs to the lhs complex type. 4973 return lhs; 4974 } 4975 if (lhs->isIntegerType() || lhs->isComplexIntegerType()) { 4976 // convert the lhs to the rhs complex type. 4977 return rhs; 4978 } 4979 // This handles complex/complex, complex/float, or float/complex. 4980 // When both operands are complex, the shorter operand is converted to the 4981 // type of the longer, and that is the type of the result. This corresponds 4982 // to what is done when combining two real floating-point operands. 4983 // The fun begins when size promotion occur across type domains. 4984 // From H&S 6.3.4: When one operand is complex and the other is a real 4985 // floating-point type, the less precise type is converted, within it's 4986 // real or complex domain, to the precision of the other type. For example, 4987 // when combining a "long double" with a "double _Complex", the 4988 // "double _Complex" is promoted to "long double _Complex". 4989 int result = getFloatingTypeOrder(lhs, rhs); 4990 4991 if (result > 0) { // The left side is bigger, convert rhs. 4992 rhs = getFloatingTypeOfSizeWithinDomain(lhs, rhs); 4993 } else if (result < 0) { // The right side is bigger, convert lhs. 4994 lhs = getFloatingTypeOfSizeWithinDomain(rhs, lhs); 4995 } 4996 // At this point, lhs and rhs have the same rank/size. Now, make sure the 4997 // domains match. This is a requirement for our implementation, C99 4998 // does not require this promotion. 4999 if (lhs != rhs) { // Domains don't match, we have complex/float mix. 5000 if (lhs->isRealFloatingType()) { // handle "double, _Complex double". 5001 return rhs; 5002 } else { // handle "_Complex double, double". 5003 return lhs; 5004 } 5005 } 5006 return lhs; // The domain/size match exactly. 5007 } 5008 // Now handle "real" floating types (i.e. float, double, long double). 5009 if (lhs->isRealFloatingType() || rhs->isRealFloatingType()) { 5010 // if we have an integer operand, the result is the real floating type. 5011 if (rhs->isIntegerType()) { 5012 // convert rhs to the lhs floating point type. 5013 return lhs; 5014 } 5015 if (rhs->isComplexIntegerType()) { 5016 // convert rhs to the complex floating point type. 5017 return getComplexType(lhs); 5018 } 5019 if (lhs->isIntegerType()) { 5020 // convert lhs to the rhs floating point type. 5021 return rhs; 5022 } 5023 if (lhs->isComplexIntegerType()) { 5024 // convert lhs to the complex floating point type. 5025 return getComplexType(rhs); 5026 } 5027 // We have two real floating types, float/complex combos were handled above. 5028 // Convert the smaller operand to the bigger result. 5029 int result = getFloatingTypeOrder(lhs, rhs); 5030 if (result > 0) // convert the rhs 5031 return lhs; 5032 assert(result < 0 && "illegal float comparison"); 5033 return rhs; // convert the lhs 5034 } 5035 if (lhs->isComplexIntegerType() || rhs->isComplexIntegerType()) { 5036 // Handle GCC complex int extension. 5037 const ComplexType *lhsComplexInt = lhs->getAsComplexIntegerType(); 5038 const ComplexType *rhsComplexInt = rhs->getAsComplexIntegerType(); 5039 5040 if (lhsComplexInt && rhsComplexInt) { 5041 if (getIntegerTypeOrder(lhsComplexInt->getElementType(), 5042 rhsComplexInt->getElementType()) >= 0) 5043 return lhs; // convert the rhs 5044 return rhs; 5045 } else if (lhsComplexInt && rhs->isIntegerType()) { 5046 // convert the rhs to the lhs complex type. 5047 return lhs; 5048 } else if (rhsComplexInt && lhs->isIntegerType()) { 5049 // convert the lhs to the rhs complex type. 5050 return rhs; 5051 } 5052 } 5053 // Finally, we have two differing integer types. 5054 // The rules for this case are in C99 6.3.1.8 5055 int compare = getIntegerTypeOrder(lhs, rhs); 5056 bool lhsSigned = lhs->isSignedIntegerType(), 5057 rhsSigned = rhs->isSignedIntegerType(); 5058 QualType destType; 5059 if (lhsSigned == rhsSigned) { 5060 // Same signedness; use the higher-ranked type 5061 destType = compare >= 0 ? lhs : rhs; 5062 } else if (compare != (lhsSigned ? 1 : -1)) { 5063 // The unsigned type has greater than or equal rank to the 5064 // signed type, so use the unsigned type 5065 destType = lhsSigned ? rhs : lhs; 5066 } else if (getIntWidth(lhs) != getIntWidth(rhs)) { 5067 // The two types are different widths; if we are here, that 5068 // means the signed type is larger than the unsigned type, so 5069 // use the signed type. 5070 destType = lhsSigned ? lhs : rhs; 5071 } else { 5072 // The signed type is higher-ranked than the unsigned type, 5073 // but isn't actually any bigger (like unsigned int and long 5074 // on most 32-bit systems). Use the unsigned type corresponding 5075 // to the signed type. 5076 destType = getCorrespondingUnsignedType(lhsSigned ? lhs : rhs); 5077 } 5078 return destType; 5079} 5080