ASTContext.cpp revision 465226e23a3008bd68973513dda1f9e3cd27dbdd
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/DeclCXX.h" 16#include "clang/AST/DeclObjC.h" 17#include "clang/AST/DeclTemplate.h" 18#include "clang/AST/Expr.h" 19#include "clang/AST/ExternalASTSource.h" 20#include "clang/AST/RecordLayout.h" 21#include "clang/Basic/SourceManager.h" 22#include "clang/Basic/TargetInfo.h" 23#include "llvm/ADT/StringExtras.h" 24#include "llvm/Support/MathExtras.h" 25#include "llvm/Support/MemoryBuffer.h" 26using namespace clang; 27 28enum FloatingRank { 29 FloatRank, DoubleRank, LongDoubleRank 30}; 31 32ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 33 TargetInfo &t, 34 IdentifierTable &idents, SelectorTable &sels, 35 bool FreeMem, unsigned size_reserve, 36 bool InitializeBuiltins) : 37 GlobalNestedNameSpecifier(0), CFConstantStringTypeDecl(0), 38 ObjCFastEnumerationStateTypeDecl(0), SourceMgr(SM), LangOpts(LOpts), 39 FreeMemory(FreeMem), Target(t), Idents(idents), Selectors(sels), 40 ExternalSource(0) { 41 if (size_reserve > 0) Types.reserve(size_reserve); 42 InitBuiltinTypes(); 43 TUDecl = TranslationUnitDecl::Create(*this); 44 BuiltinInfo.InitializeTargetBuiltins(Target); 45 if (InitializeBuiltins) 46 this->InitializeBuiltins(idents); 47} 48 49ASTContext::~ASTContext() { 50 // Deallocate all the types. 51 while (!Types.empty()) { 52 Types.back()->Destroy(*this); 53 Types.pop_back(); 54 } 55 56 { 57 llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 58 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); 59 while (I != E) { 60 ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second); 61 delete R; 62 } 63 } 64 65 { 66 llvm::DenseMap<const ObjCContainerDecl*, const ASTRecordLayout*>::iterator 67 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); 68 while (I != E) { 69 ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second); 70 delete R; 71 } 72 } 73 74 // Destroy nested-name-specifiers. 75 for (llvm::FoldingSet<NestedNameSpecifier>::iterator 76 NNS = NestedNameSpecifiers.begin(), 77 NNSEnd = NestedNameSpecifiers.end(); 78 NNS != NNSEnd; 79 /* Increment in loop */) 80 (*NNS++).Destroy(*this); 81 82 if (GlobalNestedNameSpecifier) 83 GlobalNestedNameSpecifier->Destroy(*this); 84 85 TUDecl->Destroy(*this); 86} 87 88void ASTContext::InitializeBuiltins(IdentifierTable &idents) { 89 BuiltinInfo.InitializeBuiltins(idents, LangOpts.NoBuiltin); 90} 91 92void 93ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 94 ExternalSource.reset(Source.take()); 95} 96 97void ASTContext::PrintStats() const { 98 fprintf(stderr, "*** AST Context Stats:\n"); 99 fprintf(stderr, " %d types total.\n", (int)Types.size()); 100 101 unsigned counts[] = { 102#define TYPE(Name, Parent) 0, 103#define ABSTRACT_TYPE(Name, Parent) 104#include "clang/AST/TypeNodes.def" 105 0 // Extra 106 }; 107 108 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 109 Type *T = Types[i]; 110 counts[(unsigned)T->getTypeClass()]++; 111 } 112 113 unsigned Idx = 0; 114 unsigned TotalBytes = 0; 115#define TYPE(Name, Parent) \ 116 if (counts[Idx]) \ 117 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 118 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 119 ++Idx; 120#define ABSTRACT_TYPE(Name, Parent) 121#include "clang/AST/TypeNodes.def" 122 123 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 124 125 if (ExternalSource.get()) { 126 fprintf(stderr, "\n"); 127 ExternalSource->PrintStats(); 128 } 129} 130 131 132void ASTContext::InitBuiltinType(QualType &R, BuiltinType::Kind K) { 133 Types.push_back((R = QualType(new (*this,8) BuiltinType(K),0)).getTypePtr()); 134} 135 136void ASTContext::InitBuiltinTypes() { 137 assert(VoidTy.isNull() && "Context reinitialized?"); 138 139 // C99 6.2.5p19. 140 InitBuiltinType(VoidTy, BuiltinType::Void); 141 142 // C99 6.2.5p2. 143 InitBuiltinType(BoolTy, BuiltinType::Bool); 144 // C99 6.2.5p3. 145 if (Target.isCharSigned()) 146 InitBuiltinType(CharTy, BuiltinType::Char_S); 147 else 148 InitBuiltinType(CharTy, BuiltinType::Char_U); 149 // C99 6.2.5p4. 150 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 151 InitBuiltinType(ShortTy, BuiltinType::Short); 152 InitBuiltinType(IntTy, BuiltinType::Int); 153 InitBuiltinType(LongTy, BuiltinType::Long); 154 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 155 156 // C99 6.2.5p6. 157 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 158 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 159 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 160 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 161 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 162 163 // C99 6.2.5p10. 164 InitBuiltinType(FloatTy, BuiltinType::Float); 165 InitBuiltinType(DoubleTy, BuiltinType::Double); 166 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 167 168 // GNU extension, 128-bit integers. 169 InitBuiltinType(Int128Ty, BuiltinType::Int128); 170 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 171 172 if (LangOpts.CPlusPlus) // C++ 3.9.1p5 173 InitBuiltinType(WCharTy, BuiltinType::WChar); 174 else // C99 175 WCharTy = getFromTargetType(Target.getWCharType()); 176 177 // Placeholder type for functions. 178 InitBuiltinType(OverloadTy, BuiltinType::Overload); 179 180 // Placeholder type for type-dependent expressions whose type is 181 // completely unknown. No code should ever check a type against 182 // DependentTy and users should never see it; however, it is here to 183 // help diagnose failures to properly check for type-dependent 184 // expressions. 185 InitBuiltinType(DependentTy, BuiltinType::Dependent); 186 187 // C99 6.2.5p11. 188 FloatComplexTy = getComplexType(FloatTy); 189 DoubleComplexTy = getComplexType(DoubleTy); 190 LongDoubleComplexTy = getComplexType(LongDoubleTy); 191 192 BuiltinVaListType = QualType(); 193 ObjCIdType = QualType(); 194 IdStructType = 0; 195 ObjCClassType = QualType(); 196 ClassStructType = 0; 197 198 ObjCConstantStringType = QualType(); 199 200 // void * type 201 VoidPtrTy = getPointerType(VoidTy); 202 203 // nullptr type (C++0x 2.14.7) 204 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 205} 206 207//===----------------------------------------------------------------------===// 208// Type Sizing and Analysis 209//===----------------------------------------------------------------------===// 210 211/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 212/// scalar floating point type. 213const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 214 const BuiltinType *BT = T->getAsBuiltinType(); 215 assert(BT && "Not a floating point type!"); 216 switch (BT->getKind()) { 217 default: assert(0 && "Not a floating point type!"); 218 case BuiltinType::Float: return Target.getFloatFormat(); 219 case BuiltinType::Double: return Target.getDoubleFormat(); 220 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 221 } 222} 223 224/// getDeclAlign - Return a conservative estimate of the alignment of the 225/// specified decl. Note that bitfields do not have a valid alignment, so 226/// this method will assert on them. 227unsigned ASTContext::getDeclAlignInBytes(const Decl *D) { 228 unsigned Align = Target.getCharWidth(); 229 230 if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 231 Align = std::max(Align, AA->getAlignment()); 232 233 if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 234 QualType T = VD->getType(); 235 if (const ReferenceType* RT = T->getAsReferenceType()) { 236 unsigned AS = RT->getPointeeType().getAddressSpace(); 237 Align = Target.getPointerAlign(AS); 238 } else if (!T->isIncompleteType() && !T->isFunctionType()) { 239 // Incomplete or function types default to 1. 240 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 241 T = cast<ArrayType>(T)->getElementType(); 242 243 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 244 } 245 } 246 247 return Align / Target.getCharWidth(); 248} 249 250/// getTypeSize - Return the size of the specified type, in bits. This method 251/// does not work on incomplete types. 252std::pair<uint64_t, unsigned> 253ASTContext::getTypeInfo(const Type *T) { 254 uint64_t Width=0; 255 unsigned Align=8; 256 switch (T->getTypeClass()) { 257#define TYPE(Class, Base) 258#define ABSTRACT_TYPE(Class, Base) 259#define NON_CANONICAL_TYPE(Class, Base) 260#define DEPENDENT_TYPE(Class, Base) case Type::Class: 261#include "clang/AST/TypeNodes.def" 262 assert(false && "Should not see dependent types"); 263 break; 264 265 case Type::FunctionNoProto: 266 case Type::FunctionProto: 267 // GCC extension: alignof(function) = 32 bits 268 Width = 0; 269 Align = 32; 270 break; 271 272 case Type::IncompleteArray: 273 case Type::VariableArray: 274 Width = 0; 275 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 276 break; 277 278 case Type::ConstantArray: { 279 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 280 281 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 282 Width = EltInfo.first*CAT->getSize().getZExtValue(); 283 Align = EltInfo.second; 284 break; 285 } 286 case Type::ExtVector: 287 case Type::Vector: { 288 std::pair<uint64_t, unsigned> EltInfo = 289 getTypeInfo(cast<VectorType>(T)->getElementType()); 290 Width = EltInfo.first*cast<VectorType>(T)->getNumElements(); 291 Align = Width; 292 // If the alignment is not a power of 2, round up to the next power of 2. 293 // This happens for non-power-of-2 length vectors. 294 // FIXME: this should probably be a target property. 295 Align = 1 << llvm::Log2_32_Ceil(Align); 296 break; 297 } 298 299 case Type::Builtin: 300 switch (cast<BuiltinType>(T)->getKind()) { 301 default: assert(0 && "Unknown builtin type!"); 302 case BuiltinType::Void: 303 // GCC extension: alignof(void) = 8 bits. 304 Width = 0; 305 Align = 8; 306 break; 307 308 case BuiltinType::Bool: 309 Width = Target.getBoolWidth(); 310 Align = Target.getBoolAlign(); 311 break; 312 case BuiltinType::Char_S: 313 case BuiltinType::Char_U: 314 case BuiltinType::UChar: 315 case BuiltinType::SChar: 316 Width = Target.getCharWidth(); 317 Align = Target.getCharAlign(); 318 break; 319 case BuiltinType::WChar: 320 Width = Target.getWCharWidth(); 321 Align = Target.getWCharAlign(); 322 break; 323 case BuiltinType::UShort: 324 case BuiltinType::Short: 325 Width = Target.getShortWidth(); 326 Align = Target.getShortAlign(); 327 break; 328 case BuiltinType::UInt: 329 case BuiltinType::Int: 330 Width = Target.getIntWidth(); 331 Align = Target.getIntAlign(); 332 break; 333 case BuiltinType::ULong: 334 case BuiltinType::Long: 335 Width = Target.getLongWidth(); 336 Align = Target.getLongAlign(); 337 break; 338 case BuiltinType::ULongLong: 339 case BuiltinType::LongLong: 340 Width = Target.getLongLongWidth(); 341 Align = Target.getLongLongAlign(); 342 break; 343 case BuiltinType::Int128: 344 case BuiltinType::UInt128: 345 Width = 128; 346 Align = 128; // int128_t is 128-bit aligned on all targets. 347 break; 348 case BuiltinType::Float: 349 Width = Target.getFloatWidth(); 350 Align = Target.getFloatAlign(); 351 break; 352 case BuiltinType::Double: 353 Width = Target.getDoubleWidth(); 354 Align = Target.getDoubleAlign(); 355 break; 356 case BuiltinType::LongDouble: 357 Width = Target.getLongDoubleWidth(); 358 Align = Target.getLongDoubleAlign(); 359 break; 360 case BuiltinType::NullPtr: 361 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 362 Align = Target.getPointerAlign(0); // == sizeof(void*) 363 break; 364 } 365 break; 366 case Type::FixedWidthInt: 367 // FIXME: This isn't precisely correct; the width/alignment should depend 368 // on the available types for the target 369 Width = cast<FixedWidthIntType>(T)->getWidth(); 370 Width = std::max(llvm::NextPowerOf2(Width - 1), (uint64_t)8); 371 Align = Width; 372 break; 373 case Type::ExtQual: 374 // FIXME: Pointers into different addr spaces could have different sizes and 375 // alignment requirements: getPointerInfo should take an AddrSpace. 376 return getTypeInfo(QualType(cast<ExtQualType>(T)->getBaseType(), 0)); 377 case Type::ObjCQualifiedId: 378 case Type::ObjCQualifiedInterface: 379 Width = Target.getPointerWidth(0); 380 Align = Target.getPointerAlign(0); 381 break; 382 case Type::BlockPointer: { 383 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 384 Width = Target.getPointerWidth(AS); 385 Align = Target.getPointerAlign(AS); 386 break; 387 } 388 case Type::Pointer: { 389 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 390 Width = Target.getPointerWidth(AS); 391 Align = Target.getPointerAlign(AS); 392 break; 393 } 394 case Type::LValueReference: 395 case Type::RValueReference: 396 // "When applied to a reference or a reference type, the result is the size 397 // of the referenced type." C++98 5.3.3p2: expr.sizeof. 398 // FIXME: This is wrong for struct layout: a reference in a struct has 399 // pointer size. 400 return getTypeInfo(cast<ReferenceType>(T)->getPointeeType()); 401 case Type::MemberPointer: { 402 // FIXME: This is ABI dependent. We use the Itanium C++ ABI. 403 // http://www.codesourcery.com/public/cxx-abi/abi.html#member-pointers 404 // If we ever want to support other ABIs this needs to be abstracted. 405 406 QualType Pointee = cast<MemberPointerType>(T)->getPointeeType(); 407 std::pair<uint64_t, unsigned> PtrDiffInfo = 408 getTypeInfo(getPointerDiffType()); 409 Width = PtrDiffInfo.first; 410 if (Pointee->isFunctionType()) 411 Width *= 2; 412 Align = PtrDiffInfo.second; 413 break; 414 } 415 case Type::Complex: { 416 // Complex types have the same alignment as their elements, but twice the 417 // size. 418 std::pair<uint64_t, unsigned> EltInfo = 419 getTypeInfo(cast<ComplexType>(T)->getElementType()); 420 Width = EltInfo.first*2; 421 Align = EltInfo.second; 422 break; 423 } 424 case Type::ObjCInterface: { 425 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 426 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 427 Width = Layout.getSize(); 428 Align = Layout.getAlignment(); 429 break; 430 } 431 case Type::Record: 432 case Type::Enum: { 433 const TagType *TT = cast<TagType>(T); 434 435 if (TT->getDecl()->isInvalidDecl()) { 436 Width = 1; 437 Align = 1; 438 break; 439 } 440 441 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 442 return getTypeInfo(ET->getDecl()->getIntegerType()); 443 444 const RecordType *RT = cast<RecordType>(TT); 445 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 446 Width = Layout.getSize(); 447 Align = Layout.getAlignment(); 448 break; 449 } 450 451 case Type::Typedef: { 452 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 453 if (const AlignedAttr *Aligned = Typedef->getAttr<AlignedAttr>()) { 454 Align = Aligned->getAlignment(); 455 Width = getTypeSize(Typedef->getUnderlyingType().getTypePtr()); 456 } else 457 return getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 458 break; 459 } 460 461 case Type::TypeOfExpr: 462 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 463 .getTypePtr()); 464 465 case Type::TypeOf: 466 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 467 468 case Type::QualifiedName: 469 return getTypeInfo(cast<QualifiedNameType>(T)->getNamedType().getTypePtr()); 470 471 case Type::TemplateSpecialization: 472 assert(getCanonicalType(T) != T && 473 "Cannot request the size of a dependent type"); 474 // FIXME: this is likely to be wrong once we support template 475 // aliases, since a template alias could refer to a typedef that 476 // has an __aligned__ attribute on it. 477 return getTypeInfo(getCanonicalType(T)); 478 } 479 480 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 481 return std::make_pair(Width, Align); 482} 483 484/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 485/// type for the current target in bits. This can be different than the ABI 486/// alignment in cases where it is beneficial for performance to overalign 487/// a data type. 488unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 489 unsigned ABIAlign = getTypeAlign(T); 490 491 // Double and long long should be naturally aligned if possible. 492 if (const ComplexType* CT = T->getAsComplexType()) 493 T = CT->getElementType().getTypePtr(); 494 if (T->isSpecificBuiltinType(BuiltinType::Double) || 495 T->isSpecificBuiltinType(BuiltinType::LongLong)) 496 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 497 498 return ABIAlign; 499} 500 501 502/// LayoutField - Field layout. 503void ASTRecordLayout::LayoutField(const FieldDecl *FD, unsigned FieldNo, 504 bool IsUnion, unsigned StructPacking, 505 ASTContext &Context) { 506 unsigned FieldPacking = StructPacking; 507 uint64_t FieldOffset = IsUnion ? 0 : Size; 508 uint64_t FieldSize; 509 unsigned FieldAlign; 510 511 // FIXME: Should this override struct packing? Probably we want to 512 // take the minimum? 513 if (const PackedAttr *PA = FD->getAttr<PackedAttr>()) 514 FieldPacking = PA->getAlignment(); 515 516 if (const Expr *BitWidthExpr = FD->getBitWidth()) { 517 // TODO: Need to check this algorithm on other targets! 518 // (tested on Linux-X86) 519 FieldSize = BitWidthExpr->EvaluateAsInt(Context).getZExtValue(); 520 521 std::pair<uint64_t, unsigned> FieldInfo = 522 Context.getTypeInfo(FD->getType()); 523 uint64_t TypeSize = FieldInfo.first; 524 525 // Determine the alignment of this bitfield. The packing 526 // attributes define a maximum and the alignment attribute defines 527 // a minimum. 528 // FIXME: What is the right behavior when the specified alignment 529 // is smaller than the specified packing? 530 FieldAlign = FieldInfo.second; 531 if (FieldPacking) 532 FieldAlign = std::min(FieldAlign, FieldPacking); 533 if (const AlignedAttr *AA = FD->getAttr<AlignedAttr>()) 534 FieldAlign = std::max(FieldAlign, AA->getAlignment()); 535 536 // Check if we need to add padding to give the field the correct 537 // alignment. 538 if (FieldSize == 0 || (FieldOffset & (FieldAlign-1)) + FieldSize > TypeSize) 539 FieldOffset = (FieldOffset + (FieldAlign-1)) & ~(FieldAlign-1); 540 541 // Padding members don't affect overall alignment 542 if (!FD->getIdentifier()) 543 FieldAlign = 1; 544 } else { 545 if (FD->getType()->isIncompleteArrayType()) { 546 // This is a flexible array member; we can't directly 547 // query getTypeInfo about these, so we figure it out here. 548 // Flexible array members don't have any size, but they 549 // have to be aligned appropriately for their element type. 550 FieldSize = 0; 551 const ArrayType* ATy = Context.getAsArrayType(FD->getType()); 552 FieldAlign = Context.getTypeAlign(ATy->getElementType()); 553 } else if (const ReferenceType *RT = FD->getType()->getAsReferenceType()) { 554 unsigned AS = RT->getPointeeType().getAddressSpace(); 555 FieldSize = Context.Target.getPointerWidth(AS); 556 FieldAlign = Context.Target.getPointerAlign(AS); 557 } else { 558 std::pair<uint64_t, unsigned> FieldInfo = 559 Context.getTypeInfo(FD->getType()); 560 FieldSize = FieldInfo.first; 561 FieldAlign = FieldInfo.second; 562 } 563 564 // Determine the alignment of this bitfield. The packing 565 // attributes define a maximum and the alignment attribute defines 566 // a minimum. Additionally, the packing alignment must be at least 567 // a byte for non-bitfields. 568 // 569 // FIXME: What is the right behavior when the specified alignment 570 // is smaller than the specified packing? 571 if (FieldPacking) 572 FieldAlign = std::min(FieldAlign, std::max(8U, FieldPacking)); 573 if (const AlignedAttr *AA = FD->getAttr<AlignedAttr>()) 574 FieldAlign = std::max(FieldAlign, AA->getAlignment()); 575 576 // Round up the current record size to the field's alignment boundary. 577 FieldOffset = (FieldOffset + (FieldAlign-1)) & ~(FieldAlign-1); 578 } 579 580 // Place this field at the current location. 581 FieldOffsets[FieldNo] = FieldOffset; 582 583 // Reserve space for this field. 584 if (IsUnion) { 585 Size = std::max(Size, FieldSize); 586 } else { 587 Size = FieldOffset + FieldSize; 588 } 589 590 // Remember the next available offset. 591 NextOffset = Size; 592 593 // Remember max struct/class alignment. 594 Alignment = std::max(Alignment, FieldAlign); 595} 596 597static void CollectLocalObjCIvars(ASTContext *Ctx, 598 const ObjCInterfaceDecl *OI, 599 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 600 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 601 E = OI->ivar_end(); I != E; ++I) { 602 ObjCIvarDecl *IVDecl = *I; 603 if (!IVDecl->isInvalidDecl()) 604 Fields.push_back(cast<FieldDecl>(IVDecl)); 605 } 606} 607 608void ASTContext::CollectObjCIvars(const ObjCInterfaceDecl *OI, 609 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 610 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 611 CollectObjCIvars(SuperClass, Fields); 612 CollectLocalObjCIvars(this, OI, Fields); 613} 614 615void ASTContext::CollectProtocolSynthesizedIvars(const ObjCProtocolDecl *PD, 616 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 617 for (ObjCContainerDecl::prop_iterator I = PD->prop_begin(*this), 618 E = PD->prop_end(*this); I != E; ++I) 619 if (ObjCIvarDecl *Ivar = (*I)->getPropertyIvarDecl()) 620 Ivars.push_back(Ivar); 621 622 // Also look into nested protocols. 623 for (ObjCProtocolDecl::protocol_iterator P = PD->protocol_begin(), 624 E = PD->protocol_end(); P != E; ++P) 625 CollectProtocolSynthesizedIvars(*P, Ivars); 626} 627 628/// CollectSynthesizedIvars - 629/// This routine collect synthesized ivars for the designated class. 630/// 631void ASTContext::CollectSynthesizedIvars(const ObjCInterfaceDecl *OI, 632 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 633 for (ObjCInterfaceDecl::prop_iterator I = OI->prop_begin(*this), 634 E = OI->prop_end(*this); I != E; ++I) { 635 if (ObjCIvarDecl *Ivar = (*I)->getPropertyIvarDecl()) 636 Ivars.push_back(Ivar); 637 } 638 // Also look into interface's protocol list for properties declared 639 // in the protocol and whose ivars are synthesized. 640 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 641 PE = OI->protocol_end(); P != PE; ++P) { 642 ObjCProtocolDecl *PD = (*P); 643 CollectProtocolSynthesizedIvars(PD, Ivars); 644 } 645} 646 647/// getInterfaceLayoutImpl - Get or compute information about the 648/// layout of the given interface. 649/// 650/// \param Impl - If given, also include the layout of the interface's 651/// implementation. This may differ by including synthesized ivars. 652const ASTRecordLayout & 653ASTContext::getObjCLayout(const ObjCInterfaceDecl *D, 654 const ObjCImplementationDecl *Impl) { 655 assert(!D->isForwardDecl() && "Invalid interface decl!"); 656 657 // Look up this layout, if already laid out, return what we have. 658 ObjCContainerDecl *Key = 659 Impl ? (ObjCContainerDecl*) Impl : (ObjCContainerDecl*) D; 660 if (const ASTRecordLayout *Entry = ObjCLayouts[Key]) 661 return *Entry; 662 663 unsigned FieldCount = D->ivar_size(); 664 // Add in synthesized ivar count if laying out an implementation. 665 if (Impl) { 666 llvm::SmallVector<ObjCIvarDecl*, 16> Ivars; 667 CollectSynthesizedIvars(D, Ivars); 668 FieldCount += Ivars.size(); 669 // If there aren't any sythesized ivars then reuse the interface 670 // entry. Note we can't cache this because we simply free all 671 // entries later; however we shouldn't look up implementations 672 // frequently. 673 if (FieldCount == D->ivar_size()) 674 return getObjCLayout(D, 0); 675 } 676 677 ASTRecordLayout *NewEntry = NULL; 678 if (ObjCInterfaceDecl *SD = D->getSuperClass()) { 679 const ASTRecordLayout &SL = getASTObjCInterfaceLayout(SD); 680 unsigned Alignment = SL.getAlignment(); 681 682 // We start laying out ivars not at the end of the superclass 683 // structure, but at the next byte following the last field. 684 uint64_t Size = llvm::RoundUpToAlignment(SL.NextOffset, 8); 685 686 ObjCLayouts[Key] = NewEntry = new ASTRecordLayout(Size, Alignment); 687 NewEntry->InitializeLayout(FieldCount); 688 } else { 689 ObjCLayouts[Key] = NewEntry = new ASTRecordLayout(); 690 NewEntry->InitializeLayout(FieldCount); 691 } 692 693 unsigned StructPacking = 0; 694 if (const PackedAttr *PA = D->getAttr<PackedAttr>()) 695 StructPacking = PA->getAlignment(); 696 697 if (const AlignedAttr *AA = D->getAttr<AlignedAttr>()) 698 NewEntry->SetAlignment(std::max(NewEntry->getAlignment(), 699 AA->getAlignment())); 700 701 // Layout each ivar sequentially. 702 unsigned i = 0; 703 for (ObjCInterfaceDecl::ivar_iterator IVI = D->ivar_begin(), 704 IVE = D->ivar_end(); IVI != IVE; ++IVI) { 705 const ObjCIvarDecl* Ivar = (*IVI); 706 NewEntry->LayoutField(Ivar, i++, false, StructPacking, *this); 707 } 708 // And synthesized ivars, if this is an implementation. 709 if (Impl) { 710 // FIXME. Do we need to colltect twice? 711 llvm::SmallVector<ObjCIvarDecl*, 16> Ivars; 712 CollectSynthesizedIvars(D, Ivars); 713 for (unsigned k = 0, e = Ivars.size(); k != e; ++k) 714 NewEntry->LayoutField(Ivars[k], i++, false, StructPacking, *this); 715 } 716 717 // Finally, round the size of the total struct up to the alignment of the 718 // struct itself. 719 NewEntry->FinalizeLayout(); 720 return *NewEntry; 721} 722 723const ASTRecordLayout & 724ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 725 return getObjCLayout(D, 0); 726} 727 728const ASTRecordLayout & 729ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 730 return getObjCLayout(D->getClassInterface(), D); 731} 732 733/// getASTRecordLayout - Get or compute information about the layout of the 734/// specified record (struct/union/class), which indicates its size and field 735/// position information. 736const ASTRecordLayout &ASTContext::getASTRecordLayout(const RecordDecl *D) { 737 D = D->getDefinition(*this); 738 assert(D && "Cannot get layout of forward declarations!"); 739 740 // Look up this layout, if already laid out, return what we have. 741 const ASTRecordLayout *&Entry = ASTRecordLayouts[D]; 742 if (Entry) return *Entry; 743 744 // Allocate and assign into ASTRecordLayouts here. The "Entry" reference can 745 // be invalidated (dangle) if the ASTRecordLayouts hashtable is inserted into. 746 ASTRecordLayout *NewEntry = new ASTRecordLayout(); 747 Entry = NewEntry; 748 749 // FIXME: Avoid linear walk through the fields, if possible. 750 NewEntry->InitializeLayout(std::distance(D->field_begin(*this), 751 D->field_end(*this))); 752 bool IsUnion = D->isUnion(); 753 754 unsigned StructPacking = 0; 755 if (const PackedAttr *PA = D->getAttr<PackedAttr>()) 756 StructPacking = PA->getAlignment(); 757 758 if (const AlignedAttr *AA = D->getAttr<AlignedAttr>()) 759 NewEntry->SetAlignment(std::max(NewEntry->getAlignment(), 760 AA->getAlignment())); 761 762 // Layout each field, for now, just sequentially, respecting alignment. In 763 // the future, this will need to be tweakable by targets. 764 unsigned FieldIdx = 0; 765 for (RecordDecl::field_iterator Field = D->field_begin(*this), 766 FieldEnd = D->field_end(*this); 767 Field != FieldEnd; (void)++Field, ++FieldIdx) 768 NewEntry->LayoutField(*Field, FieldIdx, IsUnion, StructPacking, *this); 769 770 // Finally, round the size of the total struct up to the alignment of the 771 // struct itself. 772 NewEntry->FinalizeLayout(getLangOptions().CPlusPlus); 773 return *NewEntry; 774} 775 776//===----------------------------------------------------------------------===// 777// Type creation/memoization methods 778//===----------------------------------------------------------------------===// 779 780QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 781 QualType CanT = getCanonicalType(T); 782 if (CanT.getAddressSpace() == AddressSpace) 783 return T; 784 785 // If we are composing extended qualifiers together, merge together into one 786 // ExtQualType node. 787 unsigned CVRQuals = T.getCVRQualifiers(); 788 QualType::GCAttrTypes GCAttr = QualType::GCNone; 789 Type *TypeNode = T.getTypePtr(); 790 791 if (ExtQualType *EQT = dyn_cast<ExtQualType>(TypeNode)) { 792 // If this type already has an address space specified, it cannot get 793 // another one. 794 assert(EQT->getAddressSpace() == 0 && 795 "Type cannot be in multiple addr spaces!"); 796 GCAttr = EQT->getObjCGCAttr(); 797 TypeNode = EQT->getBaseType(); 798 } 799 800 // Check if we've already instantiated this type. 801 llvm::FoldingSetNodeID ID; 802 ExtQualType::Profile(ID, TypeNode, AddressSpace, GCAttr); 803 void *InsertPos = 0; 804 if (ExtQualType *EXTQy = ExtQualTypes.FindNodeOrInsertPos(ID, InsertPos)) 805 return QualType(EXTQy, CVRQuals); 806 807 // If the base type isn't canonical, this won't be a canonical type either, 808 // so fill in the canonical type field. 809 QualType Canonical; 810 if (!TypeNode->isCanonical()) { 811 Canonical = getAddrSpaceQualType(CanT, AddressSpace); 812 813 // Update InsertPos, the previous call could have invalidated it. 814 ExtQualType *NewIP = ExtQualTypes.FindNodeOrInsertPos(ID, InsertPos); 815 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 816 } 817 ExtQualType *New = 818 new (*this, 8) ExtQualType(TypeNode, Canonical, AddressSpace, GCAttr); 819 ExtQualTypes.InsertNode(New, InsertPos); 820 Types.push_back(New); 821 return QualType(New, CVRQuals); 822} 823 824QualType ASTContext::getObjCGCQualType(QualType T, 825 QualType::GCAttrTypes GCAttr) { 826 QualType CanT = getCanonicalType(T); 827 if (CanT.getObjCGCAttr() == GCAttr) 828 return T; 829 830 // If we are composing extended qualifiers together, merge together into one 831 // ExtQualType node. 832 unsigned CVRQuals = T.getCVRQualifiers(); 833 Type *TypeNode = T.getTypePtr(); 834 unsigned AddressSpace = 0; 835 836 if (ExtQualType *EQT = dyn_cast<ExtQualType>(TypeNode)) { 837 // If this type already has an address space specified, it cannot get 838 // another one. 839 assert(EQT->getObjCGCAttr() == QualType::GCNone && 840 "Type cannot be in multiple addr spaces!"); 841 AddressSpace = EQT->getAddressSpace(); 842 TypeNode = EQT->getBaseType(); 843 } 844 845 // Check if we've already instantiated an gc qual'd type of this type. 846 llvm::FoldingSetNodeID ID; 847 ExtQualType::Profile(ID, TypeNode, AddressSpace, GCAttr); 848 void *InsertPos = 0; 849 if (ExtQualType *EXTQy = ExtQualTypes.FindNodeOrInsertPos(ID, InsertPos)) 850 return QualType(EXTQy, CVRQuals); 851 852 // If the base type isn't canonical, this won't be a canonical type either, 853 // so fill in the canonical type field. 854 // FIXME: Isn't this also not canonical if the base type is a array 855 // or pointer type? I can't find any documentation for objc_gc, though... 856 QualType Canonical; 857 if (!T->isCanonical()) { 858 Canonical = getObjCGCQualType(CanT, GCAttr); 859 860 // Update InsertPos, the previous call could have invalidated it. 861 ExtQualType *NewIP = ExtQualTypes.FindNodeOrInsertPos(ID, InsertPos); 862 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 863 } 864 ExtQualType *New = 865 new (*this, 8) ExtQualType(TypeNode, Canonical, AddressSpace, GCAttr); 866 ExtQualTypes.InsertNode(New, InsertPos); 867 Types.push_back(New); 868 return QualType(New, CVRQuals); 869} 870 871/// getComplexType - Return the uniqued reference to the type for a complex 872/// number with the specified element type. 873QualType ASTContext::getComplexType(QualType T) { 874 // Unique pointers, to guarantee there is only one pointer of a particular 875 // structure. 876 llvm::FoldingSetNodeID ID; 877 ComplexType::Profile(ID, T); 878 879 void *InsertPos = 0; 880 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 881 return QualType(CT, 0); 882 883 // If the pointee type isn't canonical, this won't be a canonical type either, 884 // so fill in the canonical type field. 885 QualType Canonical; 886 if (!T->isCanonical()) { 887 Canonical = getComplexType(getCanonicalType(T)); 888 889 // Get the new insert position for the node we care about. 890 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 891 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 892 } 893 ComplexType *New = new (*this,8) ComplexType(T, Canonical); 894 Types.push_back(New); 895 ComplexTypes.InsertNode(New, InsertPos); 896 return QualType(New, 0); 897} 898 899QualType ASTContext::getFixedWidthIntType(unsigned Width, bool Signed) { 900 llvm::DenseMap<unsigned, FixedWidthIntType*> &Map = Signed ? 901 SignedFixedWidthIntTypes : UnsignedFixedWidthIntTypes; 902 FixedWidthIntType *&Entry = Map[Width]; 903 if (!Entry) 904 Entry = new FixedWidthIntType(Width, Signed); 905 return QualType(Entry, 0); 906} 907 908/// getPointerType - Return the uniqued reference to the type for a pointer to 909/// the specified type. 910QualType ASTContext::getPointerType(QualType T) { 911 // Unique pointers, to guarantee there is only one pointer of a particular 912 // structure. 913 llvm::FoldingSetNodeID ID; 914 PointerType::Profile(ID, T); 915 916 void *InsertPos = 0; 917 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 918 return QualType(PT, 0); 919 920 // If the pointee type isn't canonical, this won't be a canonical type either, 921 // so fill in the canonical type field. 922 QualType Canonical; 923 if (!T->isCanonical()) { 924 Canonical = getPointerType(getCanonicalType(T)); 925 926 // Get the new insert position for the node we care about. 927 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 928 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 929 } 930 PointerType *New = new (*this,8) PointerType(T, Canonical); 931 Types.push_back(New); 932 PointerTypes.InsertNode(New, InsertPos); 933 return QualType(New, 0); 934} 935 936/// getBlockPointerType - Return the uniqued reference to the type for 937/// a pointer to the specified block. 938QualType ASTContext::getBlockPointerType(QualType T) { 939 assert(T->isFunctionType() && "block of function types only"); 940 // Unique pointers, to guarantee there is only one block of a particular 941 // structure. 942 llvm::FoldingSetNodeID ID; 943 BlockPointerType::Profile(ID, T); 944 945 void *InsertPos = 0; 946 if (BlockPointerType *PT = 947 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 948 return QualType(PT, 0); 949 950 // If the block pointee type isn't canonical, this won't be a canonical 951 // type either so fill in the canonical type field. 952 QualType Canonical; 953 if (!T->isCanonical()) { 954 Canonical = getBlockPointerType(getCanonicalType(T)); 955 956 // Get the new insert position for the node we care about. 957 BlockPointerType *NewIP = 958 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 959 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 960 } 961 BlockPointerType *New = new (*this,8) BlockPointerType(T, Canonical); 962 Types.push_back(New); 963 BlockPointerTypes.InsertNode(New, InsertPos); 964 return QualType(New, 0); 965} 966 967/// getLValueReferenceType - Return the uniqued reference to the type for an 968/// lvalue reference to the specified type. 969QualType ASTContext::getLValueReferenceType(QualType T) { 970 // Unique pointers, to guarantee there is only one pointer of a particular 971 // structure. 972 llvm::FoldingSetNodeID ID; 973 ReferenceType::Profile(ID, T); 974 975 void *InsertPos = 0; 976 if (LValueReferenceType *RT = 977 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 978 return QualType(RT, 0); 979 980 // If the referencee type isn't canonical, this won't be a canonical type 981 // either, so fill in the canonical type field. 982 QualType Canonical; 983 if (!T->isCanonical()) { 984 Canonical = getLValueReferenceType(getCanonicalType(T)); 985 986 // Get the new insert position for the node we care about. 987 LValueReferenceType *NewIP = 988 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 989 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 990 } 991 992 LValueReferenceType *New = new (*this,8) LValueReferenceType(T, Canonical); 993 Types.push_back(New); 994 LValueReferenceTypes.InsertNode(New, InsertPos); 995 return QualType(New, 0); 996} 997 998/// getRValueReferenceType - Return the uniqued reference to the type for an 999/// rvalue reference to the specified type. 1000QualType ASTContext::getRValueReferenceType(QualType T) { 1001 // Unique pointers, to guarantee there is only one pointer of a particular 1002 // structure. 1003 llvm::FoldingSetNodeID ID; 1004 ReferenceType::Profile(ID, T); 1005 1006 void *InsertPos = 0; 1007 if (RValueReferenceType *RT = 1008 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1009 return QualType(RT, 0); 1010 1011 // If the referencee type isn't canonical, this won't be a canonical type 1012 // either, so fill in the canonical type field. 1013 QualType Canonical; 1014 if (!T->isCanonical()) { 1015 Canonical = getRValueReferenceType(getCanonicalType(T)); 1016 1017 // Get the new insert position for the node we care about. 1018 RValueReferenceType *NewIP = 1019 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1020 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1021 } 1022 1023 RValueReferenceType *New = new (*this,8) RValueReferenceType(T, Canonical); 1024 Types.push_back(New); 1025 RValueReferenceTypes.InsertNode(New, InsertPos); 1026 return QualType(New, 0); 1027} 1028 1029/// getMemberPointerType - Return the uniqued reference to the type for a 1030/// member pointer to the specified type, in the specified class. 1031QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) 1032{ 1033 // Unique pointers, to guarantee there is only one pointer of a particular 1034 // structure. 1035 llvm::FoldingSetNodeID ID; 1036 MemberPointerType::Profile(ID, T, Cls); 1037 1038 void *InsertPos = 0; 1039 if (MemberPointerType *PT = 1040 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1041 return QualType(PT, 0); 1042 1043 // If the pointee or class type isn't canonical, this won't be a canonical 1044 // type either, so fill in the canonical type field. 1045 QualType Canonical; 1046 if (!T->isCanonical()) { 1047 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1048 1049 // Get the new insert position for the node we care about. 1050 MemberPointerType *NewIP = 1051 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1052 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1053 } 1054 MemberPointerType *New = new (*this,8) MemberPointerType(T, Cls, Canonical); 1055 Types.push_back(New); 1056 MemberPointerTypes.InsertNode(New, InsertPos); 1057 return QualType(New, 0); 1058} 1059 1060/// getConstantArrayType - Return the unique reference to the type for an 1061/// array of the specified element type. 1062QualType ASTContext::getConstantArrayType(QualType EltTy, 1063 const llvm::APInt &ArySizeIn, 1064 ArrayType::ArraySizeModifier ASM, 1065 unsigned EltTypeQuals) { 1066 // Convert the array size into a canonical width matching the pointer size for 1067 // the target. 1068 llvm::APInt ArySize(ArySizeIn); 1069 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1070 1071 llvm::FoldingSetNodeID ID; 1072 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1073 1074 void *InsertPos = 0; 1075 if (ConstantArrayType *ATP = 1076 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1077 return QualType(ATP, 0); 1078 1079 // If the element type isn't canonical, this won't be a canonical type either, 1080 // so fill in the canonical type field. 1081 QualType Canonical; 1082 if (!EltTy->isCanonical()) { 1083 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1084 ASM, EltTypeQuals); 1085 // Get the new insert position for the node we care about. 1086 ConstantArrayType *NewIP = 1087 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1088 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1089 } 1090 1091 ConstantArrayType *New = 1092 new(*this,8)ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1093 ConstantArrayTypes.InsertNode(New, InsertPos); 1094 Types.push_back(New); 1095 return QualType(New, 0); 1096} 1097 1098/// getVariableArrayType - Returns a non-unique reference to the type for a 1099/// variable array of the specified element type. 1100QualType ASTContext::getVariableArrayType(QualType EltTy, Expr *NumElts, 1101 ArrayType::ArraySizeModifier ASM, 1102 unsigned EltTypeQuals) { 1103 // Since we don't unique expressions, it isn't possible to unique VLA's 1104 // that have an expression provided for their size. 1105 1106 VariableArrayType *New = 1107 new(*this,8)VariableArrayType(EltTy,QualType(), NumElts, ASM, EltTypeQuals); 1108 1109 VariableArrayTypes.push_back(New); 1110 Types.push_back(New); 1111 return QualType(New, 0); 1112} 1113 1114/// getDependentSizedArrayType - Returns a non-unique reference to 1115/// the type for a dependently-sized array of the specified element 1116/// type. FIXME: We will need these to be uniqued, or at least 1117/// comparable, at some point. 1118QualType ASTContext::getDependentSizedArrayType(QualType EltTy, Expr *NumElts, 1119 ArrayType::ArraySizeModifier ASM, 1120 unsigned EltTypeQuals) { 1121 assert((NumElts->isTypeDependent() || NumElts->isValueDependent()) && 1122 "Size must be type- or value-dependent!"); 1123 1124 // Since we don't unique expressions, it isn't possible to unique 1125 // dependently-sized array types. 1126 1127 DependentSizedArrayType *New = 1128 new (*this,8) DependentSizedArrayType(EltTy, QualType(), NumElts, 1129 ASM, EltTypeQuals); 1130 1131 DependentSizedArrayTypes.push_back(New); 1132 Types.push_back(New); 1133 return QualType(New, 0); 1134} 1135 1136QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1137 ArrayType::ArraySizeModifier ASM, 1138 unsigned EltTypeQuals) { 1139 llvm::FoldingSetNodeID ID; 1140 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1141 1142 void *InsertPos = 0; 1143 if (IncompleteArrayType *ATP = 1144 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1145 return QualType(ATP, 0); 1146 1147 // If the element type isn't canonical, this won't be a canonical type 1148 // either, so fill in the canonical type field. 1149 QualType Canonical; 1150 1151 if (!EltTy->isCanonical()) { 1152 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1153 ASM, EltTypeQuals); 1154 1155 // Get the new insert position for the node we care about. 1156 IncompleteArrayType *NewIP = 1157 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1158 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1159 } 1160 1161 IncompleteArrayType *New = new (*this,8) IncompleteArrayType(EltTy, Canonical, 1162 ASM, EltTypeQuals); 1163 1164 IncompleteArrayTypes.InsertNode(New, InsertPos); 1165 Types.push_back(New); 1166 return QualType(New, 0); 1167} 1168 1169/// getVectorType - Return the unique reference to a vector type of 1170/// the specified element type and size. VectorType must be a built-in type. 1171QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts) { 1172 BuiltinType *baseType; 1173 1174 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1175 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1176 1177 // Check if we've already instantiated a vector of this type. 1178 llvm::FoldingSetNodeID ID; 1179 VectorType::Profile(ID, vecType, NumElts, Type::Vector); 1180 void *InsertPos = 0; 1181 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1182 return QualType(VTP, 0); 1183 1184 // If the element type isn't canonical, this won't be a canonical type either, 1185 // so fill in the canonical type field. 1186 QualType Canonical; 1187 if (!vecType->isCanonical()) { 1188 Canonical = getVectorType(getCanonicalType(vecType), NumElts); 1189 1190 // Get the new insert position for the node we care about. 1191 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1192 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1193 } 1194 VectorType *New = new (*this,8) VectorType(vecType, NumElts, Canonical); 1195 VectorTypes.InsertNode(New, InsertPos); 1196 Types.push_back(New); 1197 return QualType(New, 0); 1198} 1199 1200/// getExtVectorType - Return the unique reference to an extended vector type of 1201/// the specified element type and size. VectorType must be a built-in type. 1202QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1203 BuiltinType *baseType; 1204 1205 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1206 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1207 1208 // Check if we've already instantiated a vector of this type. 1209 llvm::FoldingSetNodeID ID; 1210 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector); 1211 void *InsertPos = 0; 1212 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1213 return QualType(VTP, 0); 1214 1215 // If the element type isn't canonical, this won't be a canonical type either, 1216 // so fill in the canonical type field. 1217 QualType Canonical; 1218 if (!vecType->isCanonical()) { 1219 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1220 1221 // Get the new insert position for the node we care about. 1222 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1223 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1224 } 1225 ExtVectorType *New = new (*this,8) ExtVectorType(vecType, NumElts, Canonical); 1226 VectorTypes.InsertNode(New, InsertPos); 1227 Types.push_back(New); 1228 return QualType(New, 0); 1229} 1230 1231/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1232/// 1233QualType ASTContext::getFunctionNoProtoType(QualType ResultTy) { 1234 // Unique functions, to guarantee there is only one function of a particular 1235 // structure. 1236 llvm::FoldingSetNodeID ID; 1237 FunctionNoProtoType::Profile(ID, ResultTy); 1238 1239 void *InsertPos = 0; 1240 if (FunctionNoProtoType *FT = 1241 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1242 return QualType(FT, 0); 1243 1244 QualType Canonical; 1245 if (!ResultTy->isCanonical()) { 1246 Canonical = getFunctionNoProtoType(getCanonicalType(ResultTy)); 1247 1248 // Get the new insert position for the node we care about. 1249 FunctionNoProtoType *NewIP = 1250 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1251 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1252 } 1253 1254 FunctionNoProtoType *New =new(*this,8)FunctionNoProtoType(ResultTy,Canonical); 1255 Types.push_back(New); 1256 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1257 return QualType(New, 0); 1258} 1259 1260/// getFunctionType - Return a normal function type with a typed argument 1261/// list. isVariadic indicates whether the argument list includes '...'. 1262QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1263 unsigned NumArgs, bool isVariadic, 1264 unsigned TypeQuals, bool hasExceptionSpec, 1265 bool hasAnyExceptionSpec, unsigned NumExs, 1266 const QualType *ExArray) { 1267 // Unique functions, to guarantee there is only one function of a particular 1268 // structure. 1269 llvm::FoldingSetNodeID ID; 1270 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1271 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1272 NumExs, ExArray); 1273 1274 void *InsertPos = 0; 1275 if (FunctionProtoType *FTP = 1276 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1277 return QualType(FTP, 0); 1278 1279 // Determine whether the type being created is already canonical or not. 1280 bool isCanonical = ResultTy->isCanonical(); 1281 if (hasExceptionSpec) 1282 isCanonical = false; 1283 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1284 if (!ArgArray[i]->isCanonical()) 1285 isCanonical = false; 1286 1287 // If this type isn't canonical, get the canonical version of it. 1288 // The exception spec is not part of the canonical type. 1289 QualType Canonical; 1290 if (!isCanonical) { 1291 llvm::SmallVector<QualType, 16> CanonicalArgs; 1292 CanonicalArgs.reserve(NumArgs); 1293 for (unsigned i = 0; i != NumArgs; ++i) 1294 CanonicalArgs.push_back(getCanonicalType(ArgArray[i])); 1295 1296 Canonical = getFunctionType(getCanonicalType(ResultTy), 1297 CanonicalArgs.data(), NumArgs, 1298 isVariadic, TypeQuals); 1299 1300 // Get the new insert position for the node we care about. 1301 FunctionProtoType *NewIP = 1302 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1303 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1304 } 1305 1306 // FunctionProtoType objects are allocated with extra bytes after them 1307 // for two variable size arrays (for parameter and exception types) at the 1308 // end of them. 1309 FunctionProtoType *FTP = 1310 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1311 NumArgs*sizeof(QualType) + 1312 NumExs*sizeof(QualType), 8); 1313 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1314 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1315 ExArray, NumExs, Canonical); 1316 Types.push_back(FTP); 1317 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1318 return QualType(FTP, 0); 1319} 1320 1321/// getTypeDeclType - Return the unique reference to the type for the 1322/// specified type declaration. 1323QualType ASTContext::getTypeDeclType(TypeDecl *Decl, TypeDecl* PrevDecl) { 1324 assert(Decl && "Passed null for Decl param"); 1325 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1326 1327 if (TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1328 return getTypedefType(Typedef); 1329 else if (isa<TemplateTypeParmDecl>(Decl)) { 1330 assert(false && "Template type parameter types are always available."); 1331 } else if (ObjCInterfaceDecl *ObjCInterface = dyn_cast<ObjCInterfaceDecl>(Decl)) 1332 return getObjCInterfaceType(ObjCInterface); 1333 1334 if (RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1335 if (PrevDecl) 1336 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1337 else 1338 Decl->TypeForDecl = new (*this,8) RecordType(Record); 1339 } 1340 else if (EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1341 if (PrevDecl) 1342 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1343 else 1344 Decl->TypeForDecl = new (*this,8) EnumType(Enum); 1345 } 1346 else 1347 assert(false && "TypeDecl without a type?"); 1348 1349 if (!PrevDecl) Types.push_back(Decl->TypeForDecl); 1350 return QualType(Decl->TypeForDecl, 0); 1351} 1352 1353/// getTypedefType - Return the unique reference to the type for the 1354/// specified typename decl. 1355QualType ASTContext::getTypedefType(TypedefDecl *Decl) { 1356 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1357 1358 QualType Canonical = getCanonicalType(Decl->getUnderlyingType()); 1359 Decl->TypeForDecl = new(*this,8) TypedefType(Type::Typedef, Decl, Canonical); 1360 Types.push_back(Decl->TypeForDecl); 1361 return QualType(Decl->TypeForDecl, 0); 1362} 1363 1364/// getObjCInterfaceType - Return the unique reference to the type for the 1365/// specified ObjC interface decl. 1366QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) { 1367 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1368 1369 ObjCInterfaceDecl *OID = const_cast<ObjCInterfaceDecl*>(Decl); 1370 Decl->TypeForDecl = new(*this,8) ObjCInterfaceType(Type::ObjCInterface, OID); 1371 Types.push_back(Decl->TypeForDecl); 1372 return QualType(Decl->TypeForDecl, 0); 1373} 1374 1375/// \brief Retrieve the template type parameter type for a template 1376/// parameter with the given depth, index, and (optionally) name. 1377QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1378 IdentifierInfo *Name) { 1379 llvm::FoldingSetNodeID ID; 1380 TemplateTypeParmType::Profile(ID, Depth, Index, Name); 1381 void *InsertPos = 0; 1382 TemplateTypeParmType *TypeParm 1383 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1384 1385 if (TypeParm) 1386 return QualType(TypeParm, 0); 1387 1388 if (Name) 1389 TypeParm = new (*this, 8) TemplateTypeParmType(Depth, Index, Name, 1390 getTemplateTypeParmType(Depth, Index)); 1391 else 1392 TypeParm = new (*this, 8) TemplateTypeParmType(Depth, Index); 1393 1394 Types.push_back(TypeParm); 1395 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1396 1397 return QualType(TypeParm, 0); 1398} 1399 1400QualType 1401ASTContext::getTemplateSpecializationType(TemplateName Template, 1402 const TemplateArgument *Args, 1403 unsigned NumArgs, 1404 QualType Canon) { 1405 if (!Canon.isNull()) 1406 Canon = getCanonicalType(Canon); 1407 1408 llvm::FoldingSetNodeID ID; 1409 TemplateSpecializationType::Profile(ID, Template, Args, NumArgs); 1410 1411 void *InsertPos = 0; 1412 TemplateSpecializationType *Spec 1413 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1414 1415 if (Spec) 1416 return QualType(Spec, 0); 1417 1418 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1419 sizeof(TemplateArgument) * NumArgs), 1420 8); 1421 Spec = new (Mem) TemplateSpecializationType(Template, Args, NumArgs, Canon); 1422 Types.push_back(Spec); 1423 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1424 1425 return QualType(Spec, 0); 1426} 1427 1428QualType 1429ASTContext::getQualifiedNameType(NestedNameSpecifier *NNS, 1430 QualType NamedType) { 1431 llvm::FoldingSetNodeID ID; 1432 QualifiedNameType::Profile(ID, NNS, NamedType); 1433 1434 void *InsertPos = 0; 1435 QualifiedNameType *T 1436 = QualifiedNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1437 if (T) 1438 return QualType(T, 0); 1439 1440 T = new (*this) QualifiedNameType(NNS, NamedType, 1441 getCanonicalType(NamedType)); 1442 Types.push_back(T); 1443 QualifiedNameTypes.InsertNode(T, InsertPos); 1444 return QualType(T, 0); 1445} 1446 1447QualType ASTContext::getTypenameType(NestedNameSpecifier *NNS, 1448 const IdentifierInfo *Name, 1449 QualType Canon) { 1450 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1451 1452 if (Canon.isNull()) { 1453 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1454 if (CanonNNS != NNS) 1455 Canon = getTypenameType(CanonNNS, Name); 1456 } 1457 1458 llvm::FoldingSetNodeID ID; 1459 TypenameType::Profile(ID, NNS, Name); 1460 1461 void *InsertPos = 0; 1462 TypenameType *T 1463 = TypenameTypes.FindNodeOrInsertPos(ID, InsertPos); 1464 if (T) 1465 return QualType(T, 0); 1466 1467 T = new (*this) TypenameType(NNS, Name, Canon); 1468 Types.push_back(T); 1469 TypenameTypes.InsertNode(T, InsertPos); 1470 return QualType(T, 0); 1471} 1472 1473QualType 1474ASTContext::getTypenameType(NestedNameSpecifier *NNS, 1475 const TemplateSpecializationType *TemplateId, 1476 QualType Canon) { 1477 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1478 1479 if (Canon.isNull()) { 1480 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1481 QualType CanonType = getCanonicalType(QualType(TemplateId, 0)); 1482 if (CanonNNS != NNS || CanonType != QualType(TemplateId, 0)) { 1483 const TemplateSpecializationType *CanonTemplateId 1484 = CanonType->getAsTemplateSpecializationType(); 1485 assert(CanonTemplateId && 1486 "Canonical type must also be a template specialization type"); 1487 Canon = getTypenameType(CanonNNS, CanonTemplateId); 1488 } 1489 } 1490 1491 llvm::FoldingSetNodeID ID; 1492 TypenameType::Profile(ID, NNS, TemplateId); 1493 1494 void *InsertPos = 0; 1495 TypenameType *T 1496 = TypenameTypes.FindNodeOrInsertPos(ID, InsertPos); 1497 if (T) 1498 return QualType(T, 0); 1499 1500 T = new (*this) TypenameType(NNS, TemplateId, Canon); 1501 Types.push_back(T); 1502 TypenameTypes.InsertNode(T, InsertPos); 1503 return QualType(T, 0); 1504} 1505 1506/// CmpProtocolNames - Comparison predicate for sorting protocols 1507/// alphabetically. 1508static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 1509 const ObjCProtocolDecl *RHS) { 1510 return LHS->getDeclName() < RHS->getDeclName(); 1511} 1512 1513static void SortAndUniqueProtocols(ObjCProtocolDecl **&Protocols, 1514 unsigned &NumProtocols) { 1515 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 1516 1517 // Sort protocols, keyed by name. 1518 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 1519 1520 // Remove duplicates. 1521 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 1522 NumProtocols = ProtocolsEnd-Protocols; 1523} 1524 1525 1526/// getObjCQualifiedInterfaceType - Return a ObjCQualifiedInterfaceType type for 1527/// the given interface decl and the conforming protocol list. 1528QualType ASTContext::getObjCQualifiedInterfaceType(ObjCInterfaceDecl *Decl, 1529 ObjCProtocolDecl **Protocols, unsigned NumProtocols) { 1530 // Sort the protocol list alphabetically to canonicalize it. 1531 SortAndUniqueProtocols(Protocols, NumProtocols); 1532 1533 llvm::FoldingSetNodeID ID; 1534 ObjCQualifiedInterfaceType::Profile(ID, Decl, Protocols, NumProtocols); 1535 1536 void *InsertPos = 0; 1537 if (ObjCQualifiedInterfaceType *QT = 1538 ObjCQualifiedInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1539 return QualType(QT, 0); 1540 1541 // No Match; 1542 ObjCQualifiedInterfaceType *QType = 1543 new (*this,8) ObjCQualifiedInterfaceType(Decl, Protocols, NumProtocols); 1544 1545 Types.push_back(QType); 1546 ObjCQualifiedInterfaceTypes.InsertNode(QType, InsertPos); 1547 return QualType(QType, 0); 1548} 1549 1550/// getObjCQualifiedIdType - Return an ObjCQualifiedIdType for the 'id' decl 1551/// and the conforming protocol list. 1552QualType ASTContext::getObjCQualifiedIdType(ObjCProtocolDecl **Protocols, 1553 unsigned NumProtocols) { 1554 // Sort the protocol list alphabetically to canonicalize it. 1555 SortAndUniqueProtocols(Protocols, NumProtocols); 1556 1557 llvm::FoldingSetNodeID ID; 1558 ObjCQualifiedIdType::Profile(ID, Protocols, NumProtocols); 1559 1560 void *InsertPos = 0; 1561 if (ObjCQualifiedIdType *QT = 1562 ObjCQualifiedIdTypes.FindNodeOrInsertPos(ID, InsertPos)) 1563 return QualType(QT, 0); 1564 1565 // No Match; 1566 ObjCQualifiedIdType *QType = 1567 new (*this,8) ObjCQualifiedIdType(Protocols, NumProtocols); 1568 Types.push_back(QType); 1569 ObjCQualifiedIdTypes.InsertNode(QType, InsertPos); 1570 return QualType(QType, 0); 1571} 1572 1573/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 1574/// TypeOfExprType AST's (since expression's are never shared). For example, 1575/// multiple declarations that refer to "typeof(x)" all contain different 1576/// DeclRefExpr's. This doesn't effect the type checker, since it operates 1577/// on canonical type's (which are always unique). 1578QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 1579 QualType Canonical = getCanonicalType(tofExpr->getType()); 1580 TypeOfExprType *toe = new (*this,8) TypeOfExprType(tofExpr, Canonical); 1581 Types.push_back(toe); 1582 return QualType(toe, 0); 1583} 1584 1585/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 1586/// TypeOfType AST's. The only motivation to unique these nodes would be 1587/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 1588/// an issue. This doesn't effect the type checker, since it operates 1589/// on canonical type's (which are always unique). 1590QualType ASTContext::getTypeOfType(QualType tofType) { 1591 QualType Canonical = getCanonicalType(tofType); 1592 TypeOfType *tot = new (*this,8) TypeOfType(tofType, Canonical); 1593 Types.push_back(tot); 1594 return QualType(tot, 0); 1595} 1596 1597/// getTagDeclType - Return the unique reference to the type for the 1598/// specified TagDecl (struct/union/class/enum) decl. 1599QualType ASTContext::getTagDeclType(TagDecl *Decl) { 1600 assert (Decl); 1601 return getTypeDeclType(Decl); 1602} 1603 1604/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 1605/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 1606/// needs to agree with the definition in <stddef.h>. 1607QualType ASTContext::getSizeType() const { 1608 return getFromTargetType(Target.getSizeType()); 1609} 1610 1611/// getSignedWCharType - Return the type of "signed wchar_t". 1612/// Used when in C++, as a GCC extension. 1613QualType ASTContext::getSignedWCharType() const { 1614 // FIXME: derive from "Target" ? 1615 return WCharTy; 1616} 1617 1618/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 1619/// Used when in C++, as a GCC extension. 1620QualType ASTContext::getUnsignedWCharType() const { 1621 // FIXME: derive from "Target" ? 1622 return UnsignedIntTy; 1623} 1624 1625/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 1626/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 1627QualType ASTContext::getPointerDiffType() const { 1628 return getFromTargetType(Target.getPtrDiffType(0)); 1629} 1630 1631//===----------------------------------------------------------------------===// 1632// Type Operators 1633//===----------------------------------------------------------------------===// 1634 1635/// getCanonicalType - Return the canonical (structural) type corresponding to 1636/// the specified potentially non-canonical type. The non-canonical version 1637/// of a type may have many "decorated" versions of types. Decorators can 1638/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 1639/// to be free of any of these, allowing two canonical types to be compared 1640/// for exact equality with a simple pointer comparison. 1641QualType ASTContext::getCanonicalType(QualType T) { 1642 QualType CanType = T.getTypePtr()->getCanonicalTypeInternal(); 1643 1644 // If the result has type qualifiers, make sure to canonicalize them as well. 1645 unsigned TypeQuals = T.getCVRQualifiers() | CanType.getCVRQualifiers(); 1646 if (TypeQuals == 0) return CanType; 1647 1648 // If the type qualifiers are on an array type, get the canonical type of the 1649 // array with the qualifiers applied to the element type. 1650 ArrayType *AT = dyn_cast<ArrayType>(CanType); 1651 if (!AT) 1652 return CanType.getQualifiedType(TypeQuals); 1653 1654 // Get the canonical version of the element with the extra qualifiers on it. 1655 // This can recursively sink qualifiers through multiple levels of arrays. 1656 QualType NewEltTy=AT->getElementType().getWithAdditionalQualifiers(TypeQuals); 1657 NewEltTy = getCanonicalType(NewEltTy); 1658 1659 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 1660 return getConstantArrayType(NewEltTy, CAT->getSize(),CAT->getSizeModifier(), 1661 CAT->getIndexTypeQualifier()); 1662 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 1663 return getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 1664 IAT->getIndexTypeQualifier()); 1665 1666 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 1667 return getDependentSizedArrayType(NewEltTy, DSAT->getSizeExpr(), 1668 DSAT->getSizeModifier(), 1669 DSAT->getIndexTypeQualifier()); 1670 1671 VariableArrayType *VAT = cast<VariableArrayType>(AT); 1672 return getVariableArrayType(NewEltTy, VAT->getSizeExpr(), 1673 VAT->getSizeModifier(), 1674 VAT->getIndexTypeQualifier()); 1675} 1676 1677Decl *ASTContext::getCanonicalDecl(Decl *D) { 1678 if (!D) 1679 return 0; 1680 1681 if (TagDecl *Tag = dyn_cast<TagDecl>(D)) { 1682 QualType T = getTagDeclType(Tag); 1683 return cast<TagDecl>(cast<TagType>(T.getTypePtr()->CanonicalType) 1684 ->getDecl()); 1685 } 1686 1687 if (ClassTemplateDecl *Template = dyn_cast<ClassTemplateDecl>(D)) { 1688 while (Template->getPreviousDeclaration()) 1689 Template = Template->getPreviousDeclaration(); 1690 return Template; 1691 } 1692 1693 if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) { 1694 while (Function->getPreviousDeclaration()) 1695 Function = Function->getPreviousDeclaration(); 1696 return const_cast<FunctionDecl *>(Function); 1697 } 1698 1699 if (const VarDecl *Var = dyn_cast<VarDecl>(D)) { 1700 while (Var->getPreviousDeclaration()) 1701 Var = Var->getPreviousDeclaration(); 1702 return const_cast<VarDecl *>(Var); 1703 } 1704 1705 return D; 1706} 1707 1708TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 1709 // If this template name refers to a template, the canonical 1710 // template name merely stores the template itself. 1711 if (TemplateDecl *Template = Name.getAsTemplateDecl()) 1712 return TemplateName(cast<TemplateDecl>(getCanonicalDecl(Template))); 1713 1714 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 1715 assert(DTN && "Non-dependent template names must refer to template decls."); 1716 return DTN->CanonicalTemplateName; 1717} 1718 1719NestedNameSpecifier * 1720ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 1721 if (!NNS) 1722 return 0; 1723 1724 switch (NNS->getKind()) { 1725 case NestedNameSpecifier::Identifier: 1726 // Canonicalize the prefix but keep the identifier the same. 1727 return NestedNameSpecifier::Create(*this, 1728 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 1729 NNS->getAsIdentifier()); 1730 1731 case NestedNameSpecifier::Namespace: 1732 // A namespace is canonical; build a nested-name-specifier with 1733 // this namespace and no prefix. 1734 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 1735 1736 case NestedNameSpecifier::TypeSpec: 1737 case NestedNameSpecifier::TypeSpecWithTemplate: { 1738 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 1739 NestedNameSpecifier *Prefix = 0; 1740 1741 // FIXME: This isn't the right check! 1742 if (T->isDependentType()) 1743 Prefix = getCanonicalNestedNameSpecifier(NNS->getPrefix()); 1744 1745 return NestedNameSpecifier::Create(*this, Prefix, 1746 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 1747 T.getTypePtr()); 1748 } 1749 1750 case NestedNameSpecifier::Global: 1751 // The global specifier is canonical and unique. 1752 return NNS; 1753 } 1754 1755 // Required to silence a GCC warning 1756 return 0; 1757} 1758 1759 1760const ArrayType *ASTContext::getAsArrayType(QualType T) { 1761 // Handle the non-qualified case efficiently. 1762 if (T.getCVRQualifiers() == 0) { 1763 // Handle the common positive case fast. 1764 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 1765 return AT; 1766 } 1767 1768 // Handle the common negative case fast, ignoring CVR qualifiers. 1769 QualType CType = T->getCanonicalTypeInternal(); 1770 1771 // Make sure to look through type qualifiers (like ExtQuals) for the negative 1772 // test. 1773 if (!isa<ArrayType>(CType) && 1774 !isa<ArrayType>(CType.getUnqualifiedType())) 1775 return 0; 1776 1777 // Apply any CVR qualifiers from the array type to the element type. This 1778 // implements C99 6.7.3p8: "If the specification of an array type includes 1779 // any type qualifiers, the element type is so qualified, not the array type." 1780 1781 // If we get here, we either have type qualifiers on the type, or we have 1782 // sugar such as a typedef in the way. If we have type qualifiers on the type 1783 // we must propagate them down into the elemeng type. 1784 unsigned CVRQuals = T.getCVRQualifiers(); 1785 unsigned AddrSpace = 0; 1786 Type *Ty = T.getTypePtr(); 1787 1788 // Rip through ExtQualType's and typedefs to get to a concrete type. 1789 while (1) { 1790 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(Ty)) { 1791 AddrSpace = EXTQT->getAddressSpace(); 1792 Ty = EXTQT->getBaseType(); 1793 } else { 1794 T = Ty->getDesugaredType(); 1795 if (T.getTypePtr() == Ty && T.getCVRQualifiers() == 0) 1796 break; 1797 CVRQuals |= T.getCVRQualifiers(); 1798 Ty = T.getTypePtr(); 1799 } 1800 } 1801 1802 // If we have a simple case, just return now. 1803 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 1804 if (ATy == 0 || (AddrSpace == 0 && CVRQuals == 0)) 1805 return ATy; 1806 1807 // Otherwise, we have an array and we have qualifiers on it. Push the 1808 // qualifiers into the array element type and return a new array type. 1809 // Get the canonical version of the element with the extra qualifiers on it. 1810 // This can recursively sink qualifiers through multiple levels of arrays. 1811 QualType NewEltTy = ATy->getElementType(); 1812 if (AddrSpace) 1813 NewEltTy = getAddrSpaceQualType(NewEltTy, AddrSpace); 1814 NewEltTy = NewEltTy.getWithAdditionalQualifiers(CVRQuals); 1815 1816 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 1817 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 1818 CAT->getSizeModifier(), 1819 CAT->getIndexTypeQualifier())); 1820 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 1821 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 1822 IAT->getSizeModifier(), 1823 IAT->getIndexTypeQualifier())); 1824 1825 if (const DependentSizedArrayType *DSAT 1826 = dyn_cast<DependentSizedArrayType>(ATy)) 1827 return cast<ArrayType>( 1828 getDependentSizedArrayType(NewEltTy, 1829 DSAT->getSizeExpr(), 1830 DSAT->getSizeModifier(), 1831 DSAT->getIndexTypeQualifier())); 1832 1833 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 1834 return cast<ArrayType>(getVariableArrayType(NewEltTy, VAT->getSizeExpr(), 1835 VAT->getSizeModifier(), 1836 VAT->getIndexTypeQualifier())); 1837} 1838 1839 1840/// getArrayDecayedType - Return the properly qualified result of decaying the 1841/// specified array type to a pointer. This operation is non-trivial when 1842/// handling typedefs etc. The canonical type of "T" must be an array type, 1843/// this returns a pointer to a properly qualified element of the array. 1844/// 1845/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 1846QualType ASTContext::getArrayDecayedType(QualType Ty) { 1847 // Get the element type with 'getAsArrayType' so that we don't lose any 1848 // typedefs in the element type of the array. This also handles propagation 1849 // of type qualifiers from the array type into the element type if present 1850 // (C99 6.7.3p8). 1851 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 1852 assert(PrettyArrayType && "Not an array type!"); 1853 1854 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 1855 1856 // int x[restrict 4] -> int *restrict 1857 return PtrTy.getQualifiedType(PrettyArrayType->getIndexTypeQualifier()); 1858} 1859 1860QualType ASTContext::getBaseElementType(const VariableArrayType *VAT) { 1861 QualType ElemTy = VAT->getElementType(); 1862 1863 if (const VariableArrayType *VAT = getAsVariableArrayType(ElemTy)) 1864 return getBaseElementType(VAT); 1865 1866 return ElemTy; 1867} 1868 1869/// getFloatingRank - Return a relative rank for floating point types. 1870/// This routine will assert if passed a built-in type that isn't a float. 1871static FloatingRank getFloatingRank(QualType T) { 1872 if (const ComplexType *CT = T->getAsComplexType()) 1873 return getFloatingRank(CT->getElementType()); 1874 1875 assert(T->getAsBuiltinType() && "getFloatingRank(): not a floating type"); 1876 switch (T->getAsBuiltinType()->getKind()) { 1877 default: assert(0 && "getFloatingRank(): not a floating type"); 1878 case BuiltinType::Float: return FloatRank; 1879 case BuiltinType::Double: return DoubleRank; 1880 case BuiltinType::LongDouble: return LongDoubleRank; 1881 } 1882} 1883 1884/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 1885/// point or a complex type (based on typeDomain/typeSize). 1886/// 'typeDomain' is a real floating point or complex type. 1887/// 'typeSize' is a real floating point or complex type. 1888QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 1889 QualType Domain) const { 1890 FloatingRank EltRank = getFloatingRank(Size); 1891 if (Domain->isComplexType()) { 1892 switch (EltRank) { 1893 default: assert(0 && "getFloatingRank(): illegal value for rank"); 1894 case FloatRank: return FloatComplexTy; 1895 case DoubleRank: return DoubleComplexTy; 1896 case LongDoubleRank: return LongDoubleComplexTy; 1897 } 1898 } 1899 1900 assert(Domain->isRealFloatingType() && "Unknown domain!"); 1901 switch (EltRank) { 1902 default: assert(0 && "getFloatingRank(): illegal value for rank"); 1903 case FloatRank: return FloatTy; 1904 case DoubleRank: return DoubleTy; 1905 case LongDoubleRank: return LongDoubleTy; 1906 } 1907} 1908 1909/// getFloatingTypeOrder - Compare the rank of the two specified floating 1910/// point types, ignoring the domain of the type (i.e. 'double' == 1911/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 1912/// LHS < RHS, return -1. 1913int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 1914 FloatingRank LHSR = getFloatingRank(LHS); 1915 FloatingRank RHSR = getFloatingRank(RHS); 1916 1917 if (LHSR == RHSR) 1918 return 0; 1919 if (LHSR > RHSR) 1920 return 1; 1921 return -1; 1922} 1923 1924/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 1925/// routine will assert if passed a built-in type that isn't an integer or enum, 1926/// or if it is not canonicalized. 1927unsigned ASTContext::getIntegerRank(Type *T) { 1928 assert(T->isCanonical() && "T should be canonicalized"); 1929 if (EnumType* ET = dyn_cast<EnumType>(T)) 1930 T = ET->getDecl()->getIntegerType().getTypePtr(); 1931 1932 // There are two things which impact the integer rank: the width, and 1933 // the ordering of builtins. The builtin ordering is encoded in the 1934 // bottom three bits; the width is encoded in the bits above that. 1935 if (FixedWidthIntType* FWIT = dyn_cast<FixedWidthIntType>(T)) { 1936 return FWIT->getWidth() << 3; 1937 } 1938 1939 switch (cast<BuiltinType>(T)->getKind()) { 1940 default: assert(0 && "getIntegerRank(): not a built-in integer"); 1941 case BuiltinType::Bool: 1942 return 1 + (getIntWidth(BoolTy) << 3); 1943 case BuiltinType::Char_S: 1944 case BuiltinType::Char_U: 1945 case BuiltinType::SChar: 1946 case BuiltinType::UChar: 1947 return 2 + (getIntWidth(CharTy) << 3); 1948 case BuiltinType::Short: 1949 case BuiltinType::UShort: 1950 return 3 + (getIntWidth(ShortTy) << 3); 1951 case BuiltinType::Int: 1952 case BuiltinType::UInt: 1953 return 4 + (getIntWidth(IntTy) << 3); 1954 case BuiltinType::Long: 1955 case BuiltinType::ULong: 1956 return 5 + (getIntWidth(LongTy) << 3); 1957 case BuiltinType::LongLong: 1958 case BuiltinType::ULongLong: 1959 return 6 + (getIntWidth(LongLongTy) << 3); 1960 case BuiltinType::Int128: 1961 case BuiltinType::UInt128: 1962 return 7 + (getIntWidth(Int128Ty) << 3); 1963 } 1964} 1965 1966/// getIntegerTypeOrder - Returns the highest ranked integer type: 1967/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 1968/// LHS < RHS, return -1. 1969int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 1970 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 1971 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 1972 if (LHSC == RHSC) return 0; 1973 1974 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 1975 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 1976 1977 unsigned LHSRank = getIntegerRank(LHSC); 1978 unsigned RHSRank = getIntegerRank(RHSC); 1979 1980 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 1981 if (LHSRank == RHSRank) return 0; 1982 return LHSRank > RHSRank ? 1 : -1; 1983 } 1984 1985 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 1986 if (LHSUnsigned) { 1987 // If the unsigned [LHS] type is larger, return it. 1988 if (LHSRank >= RHSRank) 1989 return 1; 1990 1991 // If the signed type can represent all values of the unsigned type, it 1992 // wins. Because we are dealing with 2's complement and types that are 1993 // powers of two larger than each other, this is always safe. 1994 return -1; 1995 } 1996 1997 // If the unsigned [RHS] type is larger, return it. 1998 if (RHSRank >= LHSRank) 1999 return -1; 2000 2001 // If the signed type can represent all values of the unsigned type, it 2002 // wins. Because we are dealing with 2's complement and types that are 2003 // powers of two larger than each other, this is always safe. 2004 return 1; 2005} 2006 2007// getCFConstantStringType - Return the type used for constant CFStrings. 2008QualType ASTContext::getCFConstantStringType() { 2009 if (!CFConstantStringTypeDecl) { 2010 CFConstantStringTypeDecl = 2011 RecordDecl::Create(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2012 &Idents.get("NSConstantString")); 2013 QualType FieldTypes[4]; 2014 2015 // const int *isa; 2016 FieldTypes[0] = getPointerType(IntTy.getQualifiedType(QualType::Const)); 2017 // int flags; 2018 FieldTypes[1] = IntTy; 2019 // const char *str; 2020 FieldTypes[2] = getPointerType(CharTy.getQualifiedType(QualType::Const)); 2021 // long length; 2022 FieldTypes[3] = LongTy; 2023 2024 // Create fields 2025 for (unsigned i = 0; i < 4; ++i) { 2026 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2027 SourceLocation(), 0, 2028 FieldTypes[i], /*BitWidth=*/0, 2029 /*Mutable=*/false); 2030 CFConstantStringTypeDecl->addDecl(*this, Field); 2031 } 2032 2033 CFConstantStringTypeDecl->completeDefinition(*this); 2034 } 2035 2036 return getTagDeclType(CFConstantStringTypeDecl); 2037} 2038 2039void ASTContext::setCFConstantStringType(QualType T) { 2040 const RecordType *Rec = T->getAsRecordType(); 2041 assert(Rec && "Invalid CFConstantStringType"); 2042 CFConstantStringTypeDecl = Rec->getDecl(); 2043} 2044 2045QualType ASTContext::getObjCFastEnumerationStateType() 2046{ 2047 if (!ObjCFastEnumerationStateTypeDecl) { 2048 ObjCFastEnumerationStateTypeDecl = 2049 RecordDecl::Create(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2050 &Idents.get("__objcFastEnumerationState")); 2051 2052 QualType FieldTypes[] = { 2053 UnsignedLongTy, 2054 getPointerType(ObjCIdType), 2055 getPointerType(UnsignedLongTy), 2056 getConstantArrayType(UnsignedLongTy, 2057 llvm::APInt(32, 5), ArrayType::Normal, 0) 2058 }; 2059 2060 for (size_t i = 0; i < 4; ++i) { 2061 FieldDecl *Field = FieldDecl::Create(*this, 2062 ObjCFastEnumerationStateTypeDecl, 2063 SourceLocation(), 0, 2064 FieldTypes[i], /*BitWidth=*/0, 2065 /*Mutable=*/false); 2066 ObjCFastEnumerationStateTypeDecl->addDecl(*this, Field); 2067 } 2068 2069 ObjCFastEnumerationStateTypeDecl->completeDefinition(*this); 2070 } 2071 2072 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 2073} 2074 2075void ASTContext::setObjCFastEnumerationStateType(QualType T) { 2076 const RecordType *Rec = T->getAsRecordType(); 2077 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 2078 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 2079} 2080 2081// This returns true if a type has been typedefed to BOOL: 2082// typedef <type> BOOL; 2083static bool isTypeTypedefedAsBOOL(QualType T) { 2084 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 2085 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 2086 return II->isStr("BOOL"); 2087 2088 return false; 2089} 2090 2091/// getObjCEncodingTypeSize returns size of type for objective-c encoding 2092/// purpose. 2093int ASTContext::getObjCEncodingTypeSize(QualType type) { 2094 uint64_t sz = getTypeSize(type); 2095 2096 // Make all integer and enum types at least as large as an int 2097 if (sz > 0 && type->isIntegralType()) 2098 sz = std::max(sz, getTypeSize(IntTy)); 2099 // Treat arrays as pointers, since that's how they're passed in. 2100 else if (type->isArrayType()) 2101 sz = getTypeSize(VoidPtrTy); 2102 return sz / getTypeSize(CharTy); 2103} 2104 2105/// getObjCEncodingForMethodDecl - Return the encoded type for this method 2106/// declaration. 2107void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 2108 std::string& S) { 2109 // FIXME: This is not very efficient. 2110 // Encode type qualifer, 'in', 'inout', etc. for the return type. 2111 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 2112 // Encode result type. 2113 getObjCEncodingForType(Decl->getResultType(), S); 2114 // Compute size of all parameters. 2115 // Start with computing size of a pointer in number of bytes. 2116 // FIXME: There might(should) be a better way of doing this computation! 2117 SourceLocation Loc; 2118 int PtrSize = getTypeSize(VoidPtrTy) / getTypeSize(CharTy); 2119 // The first two arguments (self and _cmd) are pointers; account for 2120 // their size. 2121 int ParmOffset = 2 * PtrSize; 2122 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 2123 E = Decl->param_end(); PI != E; ++PI) { 2124 QualType PType = (*PI)->getType(); 2125 int sz = getObjCEncodingTypeSize(PType); 2126 assert (sz > 0 && "getObjCEncodingForMethodDecl - Incomplete param type"); 2127 ParmOffset += sz; 2128 } 2129 S += llvm::utostr(ParmOffset); 2130 S += "@0:"; 2131 S += llvm::utostr(PtrSize); 2132 2133 // Argument types. 2134 ParmOffset = 2 * PtrSize; 2135 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 2136 E = Decl->param_end(); PI != E; ++PI) { 2137 ParmVarDecl *PVDecl = *PI; 2138 QualType PType = PVDecl->getOriginalType(); 2139 if (const ArrayType *AT = 2140 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 2141 // Use array's original type only if it has known number of 2142 // elements. 2143 if (!isa<ConstantArrayType>(AT)) 2144 PType = PVDecl->getType(); 2145 } else if (PType->isFunctionType()) 2146 PType = PVDecl->getType(); 2147 // Process argument qualifiers for user supplied arguments; such as, 2148 // 'in', 'inout', etc. 2149 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 2150 getObjCEncodingForType(PType, S); 2151 S += llvm::utostr(ParmOffset); 2152 ParmOffset += getObjCEncodingTypeSize(PType); 2153 } 2154} 2155 2156/// getObjCEncodingForPropertyDecl - Return the encoded type for this 2157/// property declaration. If non-NULL, Container must be either an 2158/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 2159/// NULL when getting encodings for protocol properties. 2160/// Property attributes are stored as a comma-delimited C string. The simple 2161/// attributes readonly and bycopy are encoded as single characters. The 2162/// parametrized attributes, getter=name, setter=name, and ivar=name, are 2163/// encoded as single characters, followed by an identifier. Property types 2164/// are also encoded as a parametrized attribute. The characters used to encode 2165/// these attributes are defined by the following enumeration: 2166/// @code 2167/// enum PropertyAttributes { 2168/// kPropertyReadOnly = 'R', // property is read-only. 2169/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 2170/// kPropertyByref = '&', // property is a reference to the value last assigned 2171/// kPropertyDynamic = 'D', // property is dynamic 2172/// kPropertyGetter = 'G', // followed by getter selector name 2173/// kPropertySetter = 'S', // followed by setter selector name 2174/// kPropertyInstanceVariable = 'V' // followed by instance variable name 2175/// kPropertyType = 't' // followed by old-style type encoding. 2176/// kPropertyWeak = 'W' // 'weak' property 2177/// kPropertyStrong = 'P' // property GC'able 2178/// kPropertyNonAtomic = 'N' // property non-atomic 2179/// }; 2180/// @endcode 2181void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 2182 const Decl *Container, 2183 std::string& S) { 2184 // Collect information from the property implementation decl(s). 2185 bool Dynamic = false; 2186 ObjCPropertyImplDecl *SynthesizePID = 0; 2187 2188 // FIXME: Duplicated code due to poor abstraction. 2189 if (Container) { 2190 if (const ObjCCategoryImplDecl *CID = 2191 dyn_cast<ObjCCategoryImplDecl>(Container)) { 2192 for (ObjCCategoryImplDecl::propimpl_iterator 2193 i = CID->propimpl_begin(*this), e = CID->propimpl_end(*this); 2194 i != e; ++i) { 2195 ObjCPropertyImplDecl *PID = *i; 2196 if (PID->getPropertyDecl() == PD) { 2197 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 2198 Dynamic = true; 2199 } else { 2200 SynthesizePID = PID; 2201 } 2202 } 2203 } 2204 } else { 2205 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 2206 for (ObjCCategoryImplDecl::propimpl_iterator 2207 i = OID->propimpl_begin(*this), e = OID->propimpl_end(*this); 2208 i != e; ++i) { 2209 ObjCPropertyImplDecl *PID = *i; 2210 if (PID->getPropertyDecl() == PD) { 2211 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 2212 Dynamic = true; 2213 } else { 2214 SynthesizePID = PID; 2215 } 2216 } 2217 } 2218 } 2219 } 2220 2221 // FIXME: This is not very efficient. 2222 S = "T"; 2223 2224 // Encode result type. 2225 // GCC has some special rules regarding encoding of properties which 2226 // closely resembles encoding of ivars. 2227 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 2228 true /* outermost type */, 2229 true /* encoding for property */); 2230 2231 if (PD->isReadOnly()) { 2232 S += ",R"; 2233 } else { 2234 switch (PD->getSetterKind()) { 2235 case ObjCPropertyDecl::Assign: break; 2236 case ObjCPropertyDecl::Copy: S += ",C"; break; 2237 case ObjCPropertyDecl::Retain: S += ",&"; break; 2238 } 2239 } 2240 2241 // It really isn't clear at all what this means, since properties 2242 // are "dynamic by default". 2243 if (Dynamic) 2244 S += ",D"; 2245 2246 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 2247 S += ",N"; 2248 2249 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 2250 S += ",G"; 2251 S += PD->getGetterName().getAsString(); 2252 } 2253 2254 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 2255 S += ",S"; 2256 S += PD->getSetterName().getAsString(); 2257 } 2258 2259 if (SynthesizePID) { 2260 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 2261 S += ",V"; 2262 S += OID->getNameAsString(); 2263 } 2264 2265 // FIXME: OBJCGC: weak & strong 2266} 2267 2268/// getLegacyIntegralTypeEncoding - 2269/// Another legacy compatibility encoding: 32-bit longs are encoded as 2270/// 'l' or 'L' , but not always. For typedefs, we need to use 2271/// 'i' or 'I' instead if encoding a struct field, or a pointer! 2272/// 2273void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 2274 if (dyn_cast<TypedefType>(PointeeTy.getTypePtr())) { 2275 if (const BuiltinType *BT = PointeeTy->getAsBuiltinType()) { 2276 if (BT->getKind() == BuiltinType::ULong && 2277 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 2278 PointeeTy = UnsignedIntTy; 2279 else 2280 if (BT->getKind() == BuiltinType::Long && 2281 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 2282 PointeeTy = IntTy; 2283 } 2284 } 2285} 2286 2287void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 2288 const FieldDecl *Field) { 2289 // We follow the behavior of gcc, expanding structures which are 2290 // directly pointed to, and expanding embedded structures. Note that 2291 // these rules are sufficient to prevent recursive encoding of the 2292 // same type. 2293 getObjCEncodingForTypeImpl(T, S, true, true, Field, 2294 true /* outermost type */); 2295} 2296 2297static void EncodeBitField(const ASTContext *Context, std::string& S, 2298 const FieldDecl *FD) { 2299 const Expr *E = FD->getBitWidth(); 2300 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 2301 ASTContext *Ctx = const_cast<ASTContext*>(Context); 2302 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 2303 S += 'b'; 2304 S += llvm::utostr(N); 2305} 2306 2307void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 2308 bool ExpandPointedToStructures, 2309 bool ExpandStructures, 2310 const FieldDecl *FD, 2311 bool OutermostType, 2312 bool EncodingProperty) { 2313 if (const BuiltinType *BT = T->getAsBuiltinType()) { 2314 if (FD && FD->isBitField()) { 2315 EncodeBitField(this, S, FD); 2316 } 2317 else { 2318 char encoding; 2319 switch (BT->getKind()) { 2320 default: assert(0 && "Unhandled builtin type kind"); 2321 case BuiltinType::Void: encoding = 'v'; break; 2322 case BuiltinType::Bool: encoding = 'B'; break; 2323 case BuiltinType::Char_U: 2324 case BuiltinType::UChar: encoding = 'C'; break; 2325 case BuiltinType::UShort: encoding = 'S'; break; 2326 case BuiltinType::UInt: encoding = 'I'; break; 2327 case BuiltinType::ULong: 2328 encoding = 2329 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'L' : 'Q'; 2330 break; 2331 case BuiltinType::UInt128: encoding = 'T'; break; 2332 case BuiltinType::ULongLong: encoding = 'Q'; break; 2333 case BuiltinType::Char_S: 2334 case BuiltinType::SChar: encoding = 'c'; break; 2335 case BuiltinType::Short: encoding = 's'; break; 2336 case BuiltinType::Int: encoding = 'i'; break; 2337 case BuiltinType::Long: 2338 encoding = 2339 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'l' : 'q'; 2340 break; 2341 case BuiltinType::LongLong: encoding = 'q'; break; 2342 case BuiltinType::Int128: encoding = 't'; break; 2343 case BuiltinType::Float: encoding = 'f'; break; 2344 case BuiltinType::Double: encoding = 'd'; break; 2345 case BuiltinType::LongDouble: encoding = 'd'; break; 2346 } 2347 2348 S += encoding; 2349 } 2350 } else if (const ComplexType *CT = T->getAsComplexType()) { 2351 S += 'j'; 2352 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 2353 false); 2354 } else if (T->isObjCQualifiedIdType()) { 2355 getObjCEncodingForTypeImpl(getObjCIdType(), S, 2356 ExpandPointedToStructures, 2357 ExpandStructures, FD); 2358 if (FD || EncodingProperty) { 2359 // Note that we do extended encoding of protocol qualifer list 2360 // Only when doing ivar or property encoding. 2361 const ObjCQualifiedIdType *QIDT = T->getAsObjCQualifiedIdType(); 2362 S += '"'; 2363 for (ObjCQualifiedIdType::qual_iterator I = QIDT->qual_begin(), 2364 E = QIDT->qual_end(); I != E; ++I) { 2365 S += '<'; 2366 S += (*I)->getNameAsString(); 2367 S += '>'; 2368 } 2369 S += '"'; 2370 } 2371 return; 2372 } 2373 else if (const PointerType *PT = T->getAsPointerType()) { 2374 QualType PointeeTy = PT->getPointeeType(); 2375 bool isReadOnly = false; 2376 // For historical/compatibility reasons, the read-only qualifier of the 2377 // pointee gets emitted _before_ the '^'. The read-only qualifier of 2378 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 2379 // Also, do not emit the 'r' for anything but the outermost type! 2380 if (dyn_cast<TypedefType>(T.getTypePtr())) { 2381 if (OutermostType && T.isConstQualified()) { 2382 isReadOnly = true; 2383 S += 'r'; 2384 } 2385 } 2386 else if (OutermostType) { 2387 QualType P = PointeeTy; 2388 while (P->getAsPointerType()) 2389 P = P->getAsPointerType()->getPointeeType(); 2390 if (P.isConstQualified()) { 2391 isReadOnly = true; 2392 S += 'r'; 2393 } 2394 } 2395 if (isReadOnly) { 2396 // Another legacy compatibility encoding. Some ObjC qualifier and type 2397 // combinations need to be rearranged. 2398 // Rewrite "in const" from "nr" to "rn" 2399 const char * s = S.c_str(); 2400 int len = S.length(); 2401 if (len >= 2 && s[len-2] == 'n' && s[len-1] == 'r') { 2402 std::string replace = "rn"; 2403 S.replace(S.end()-2, S.end(), replace); 2404 } 2405 } 2406 if (isObjCIdStructType(PointeeTy)) { 2407 S += '@'; 2408 return; 2409 } 2410 else if (PointeeTy->isObjCInterfaceType()) { 2411 if (!EncodingProperty && 2412 isa<TypedefType>(PointeeTy.getTypePtr())) { 2413 // Another historical/compatibility reason. 2414 // We encode the underlying type which comes out as 2415 // {...}; 2416 S += '^'; 2417 getObjCEncodingForTypeImpl(PointeeTy, S, 2418 false, ExpandPointedToStructures, 2419 NULL); 2420 return; 2421 } 2422 S += '@'; 2423 if (FD || EncodingProperty) { 2424 const ObjCInterfaceType *OIT = 2425 PointeeTy.getUnqualifiedType()->getAsObjCInterfaceType(); 2426 ObjCInterfaceDecl *OI = OIT->getDecl(); 2427 S += '"'; 2428 S += OI->getNameAsCString(); 2429 for (ObjCInterfaceType::qual_iterator I = OIT->qual_begin(), 2430 E = OIT->qual_end(); I != E; ++I) { 2431 S += '<'; 2432 S += (*I)->getNameAsString(); 2433 S += '>'; 2434 } 2435 S += '"'; 2436 } 2437 return; 2438 } else if (isObjCClassStructType(PointeeTy)) { 2439 S += '#'; 2440 return; 2441 } else if (isObjCSelType(PointeeTy)) { 2442 S += ':'; 2443 return; 2444 } 2445 2446 if (PointeeTy->isCharType()) { 2447 // char pointer types should be encoded as '*' unless it is a 2448 // type that has been typedef'd to 'BOOL'. 2449 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 2450 S += '*'; 2451 return; 2452 } 2453 } 2454 2455 S += '^'; 2456 getLegacyIntegralTypeEncoding(PointeeTy); 2457 2458 getObjCEncodingForTypeImpl(PointeeTy, S, 2459 false, ExpandPointedToStructures, 2460 NULL); 2461 } else if (const ArrayType *AT = 2462 // Ignore type qualifiers etc. 2463 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 2464 if (isa<IncompleteArrayType>(AT)) { 2465 // Incomplete arrays are encoded as a pointer to the array element. 2466 S += '^'; 2467 2468 getObjCEncodingForTypeImpl(AT->getElementType(), S, 2469 false, ExpandStructures, FD); 2470 } else { 2471 S += '['; 2472 2473 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2474 S += llvm::utostr(CAT->getSize().getZExtValue()); 2475 else { 2476 //Variable length arrays are encoded as a regular array with 0 elements. 2477 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 2478 S += '0'; 2479 } 2480 2481 getObjCEncodingForTypeImpl(AT->getElementType(), S, 2482 false, ExpandStructures, FD); 2483 S += ']'; 2484 } 2485 } else if (T->getAsFunctionType()) { 2486 S += '?'; 2487 } else if (const RecordType *RTy = T->getAsRecordType()) { 2488 RecordDecl *RDecl = RTy->getDecl(); 2489 S += RDecl->isUnion() ? '(' : '{'; 2490 // Anonymous structures print as '?' 2491 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 2492 S += II->getName(); 2493 } else { 2494 S += '?'; 2495 } 2496 if (ExpandStructures) { 2497 S += '='; 2498 for (RecordDecl::field_iterator Field = RDecl->field_begin(*this), 2499 FieldEnd = RDecl->field_end(*this); 2500 Field != FieldEnd; ++Field) { 2501 if (FD) { 2502 S += '"'; 2503 S += Field->getNameAsString(); 2504 S += '"'; 2505 } 2506 2507 // Special case bit-fields. 2508 if (Field->isBitField()) { 2509 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 2510 (*Field)); 2511 } else { 2512 QualType qt = Field->getType(); 2513 getLegacyIntegralTypeEncoding(qt); 2514 getObjCEncodingForTypeImpl(qt, S, false, true, 2515 FD); 2516 } 2517 } 2518 } 2519 S += RDecl->isUnion() ? ')' : '}'; 2520 } else if (T->isEnumeralType()) { 2521 if (FD && FD->isBitField()) 2522 EncodeBitField(this, S, FD); 2523 else 2524 S += 'i'; 2525 } else if (T->isBlockPointerType()) { 2526 S += "@?"; // Unlike a pointer-to-function, which is "^?". 2527 } else if (T->isObjCInterfaceType()) { 2528 // @encode(class_name) 2529 ObjCInterfaceDecl *OI = T->getAsObjCInterfaceType()->getDecl(); 2530 S += '{'; 2531 const IdentifierInfo *II = OI->getIdentifier(); 2532 S += II->getName(); 2533 S += '='; 2534 llvm::SmallVector<FieldDecl*, 32> RecFields; 2535 CollectObjCIvars(OI, RecFields); 2536 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 2537 if (RecFields[i]->isBitField()) 2538 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 2539 RecFields[i]); 2540 else 2541 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 2542 FD); 2543 } 2544 S += '}'; 2545 } 2546 else 2547 assert(0 && "@encode for type not implemented!"); 2548} 2549 2550void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 2551 std::string& S) const { 2552 if (QT & Decl::OBJC_TQ_In) 2553 S += 'n'; 2554 if (QT & Decl::OBJC_TQ_Inout) 2555 S += 'N'; 2556 if (QT & Decl::OBJC_TQ_Out) 2557 S += 'o'; 2558 if (QT & Decl::OBJC_TQ_Bycopy) 2559 S += 'O'; 2560 if (QT & Decl::OBJC_TQ_Byref) 2561 S += 'R'; 2562 if (QT & Decl::OBJC_TQ_Oneway) 2563 S += 'V'; 2564} 2565 2566void ASTContext::setBuiltinVaListType(QualType T) 2567{ 2568 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 2569 2570 BuiltinVaListType = T; 2571} 2572 2573void ASTContext::setObjCIdType(QualType T) 2574{ 2575 ObjCIdType = T; 2576 2577 const TypedefType *TT = T->getAsTypedefType(); 2578 if (!TT) 2579 return; 2580 2581 TypedefDecl *TD = TT->getDecl(); 2582 2583 // typedef struct objc_object *id; 2584 const PointerType *ptr = TD->getUnderlyingType()->getAsPointerType(); 2585 // User error - caller will issue diagnostics. 2586 if (!ptr) 2587 return; 2588 const RecordType *rec = ptr->getPointeeType()->getAsStructureType(); 2589 // User error - caller will issue diagnostics. 2590 if (!rec) 2591 return; 2592 IdStructType = rec; 2593} 2594 2595void ASTContext::setObjCSelType(QualType T) 2596{ 2597 ObjCSelType = T; 2598 2599 const TypedefType *TT = T->getAsTypedefType(); 2600 if (!TT) 2601 return; 2602 TypedefDecl *TD = TT->getDecl(); 2603 2604 // typedef struct objc_selector *SEL; 2605 const PointerType *ptr = TD->getUnderlyingType()->getAsPointerType(); 2606 if (!ptr) 2607 return; 2608 const RecordType *rec = ptr->getPointeeType()->getAsStructureType(); 2609 if (!rec) 2610 return; 2611 SelStructType = rec; 2612} 2613 2614void ASTContext::setObjCProtoType(QualType QT) 2615{ 2616 ObjCProtoType = QT; 2617} 2618 2619void ASTContext::setObjCClassType(QualType T) 2620{ 2621 ObjCClassType = T; 2622 2623 const TypedefType *TT = T->getAsTypedefType(); 2624 if (!TT) 2625 return; 2626 TypedefDecl *TD = TT->getDecl(); 2627 2628 // typedef struct objc_class *Class; 2629 const PointerType *ptr = TD->getUnderlyingType()->getAsPointerType(); 2630 assert(ptr && "'Class' incorrectly typed"); 2631 const RecordType *rec = ptr->getPointeeType()->getAsStructureType(); 2632 assert(rec && "'Class' incorrectly typed"); 2633 ClassStructType = rec; 2634} 2635 2636void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 2637 assert(ObjCConstantStringType.isNull() && 2638 "'NSConstantString' type already set!"); 2639 2640 ObjCConstantStringType = getObjCInterfaceType(Decl); 2641} 2642 2643/// \brief Retrieve the template name that represents a qualified 2644/// template name such as \c std::vector. 2645TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 2646 bool TemplateKeyword, 2647 TemplateDecl *Template) { 2648 llvm::FoldingSetNodeID ID; 2649 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 2650 2651 void *InsertPos = 0; 2652 QualifiedTemplateName *QTN = 2653 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 2654 if (!QTN) { 2655 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 2656 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 2657 } 2658 2659 return TemplateName(QTN); 2660} 2661 2662/// \brief Retrieve the template name that represents a dependent 2663/// template name such as \c MetaFun::template apply. 2664TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 2665 const IdentifierInfo *Name) { 2666 assert(NNS->isDependent() && "Nested name specifier must be dependent"); 2667 2668 llvm::FoldingSetNodeID ID; 2669 DependentTemplateName::Profile(ID, NNS, Name); 2670 2671 void *InsertPos = 0; 2672 DependentTemplateName *QTN = 2673 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 2674 2675 if (QTN) 2676 return TemplateName(QTN); 2677 2678 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2679 if (CanonNNS == NNS) { 2680 QTN = new (*this,4) DependentTemplateName(NNS, Name); 2681 } else { 2682 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 2683 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 2684 } 2685 2686 DependentTemplateNames.InsertNode(QTN, InsertPos); 2687 return TemplateName(QTN); 2688} 2689 2690/// getFromTargetType - Given one of the integer types provided by 2691/// TargetInfo, produce the corresponding type. The unsigned @p Type 2692/// is actually a value of type @c TargetInfo::IntType. 2693QualType ASTContext::getFromTargetType(unsigned Type) const { 2694 switch (Type) { 2695 case TargetInfo::NoInt: return QualType(); 2696 case TargetInfo::SignedShort: return ShortTy; 2697 case TargetInfo::UnsignedShort: return UnsignedShortTy; 2698 case TargetInfo::SignedInt: return IntTy; 2699 case TargetInfo::UnsignedInt: return UnsignedIntTy; 2700 case TargetInfo::SignedLong: return LongTy; 2701 case TargetInfo::UnsignedLong: return UnsignedLongTy; 2702 case TargetInfo::SignedLongLong: return LongLongTy; 2703 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 2704 } 2705 2706 assert(false && "Unhandled TargetInfo::IntType value"); 2707 return QualType(); 2708} 2709 2710//===----------------------------------------------------------------------===// 2711// Type Predicates. 2712//===----------------------------------------------------------------------===// 2713 2714/// isObjCNSObjectType - Return true if this is an NSObject object using 2715/// NSObject attribute on a c-style pointer type. 2716/// FIXME - Make it work directly on types. 2717/// 2718bool ASTContext::isObjCNSObjectType(QualType Ty) const { 2719 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 2720 if (TypedefDecl *TD = TDT->getDecl()) 2721 if (TD->getAttr<ObjCNSObjectAttr>()) 2722 return true; 2723 } 2724 return false; 2725} 2726 2727/// isObjCObjectPointerType - Returns true if type is an Objective-C pointer 2728/// to an object type. This includes "id" and "Class" (two 'special' pointers 2729/// to struct), Interface* (pointer to ObjCInterfaceType) and id<P> (qualified 2730/// ID type). 2731bool ASTContext::isObjCObjectPointerType(QualType Ty) const { 2732 if (Ty->isObjCQualifiedIdType()) 2733 return true; 2734 2735 // Blocks are objects. 2736 if (Ty->isBlockPointerType()) 2737 return true; 2738 2739 // All other object types are pointers. 2740 const PointerType *PT = Ty->getAsPointerType(); 2741 if (PT == 0) 2742 return false; 2743 2744 // If this a pointer to an interface (e.g. NSString*), it is ok. 2745 if (PT->getPointeeType()->isObjCInterfaceType() || 2746 // If is has NSObject attribute, OK as well. 2747 isObjCNSObjectType(Ty)) 2748 return true; 2749 2750 // Check to see if this is 'id' or 'Class', both of which are typedefs for 2751 // pointer types. This looks for the typedef specifically, not for the 2752 // underlying type. Iteratively strip off typedefs so that we can handle 2753 // typedefs of typedefs. 2754 while (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 2755 if (Ty.getUnqualifiedType() == getObjCIdType() || 2756 Ty.getUnqualifiedType() == getObjCClassType()) 2757 return true; 2758 2759 Ty = TDT->getDecl()->getUnderlyingType(); 2760 } 2761 2762 return false; 2763} 2764 2765/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 2766/// garbage collection attribute. 2767/// 2768QualType::GCAttrTypes ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 2769 QualType::GCAttrTypes GCAttrs = QualType::GCNone; 2770 if (getLangOptions().ObjC1 && 2771 getLangOptions().getGCMode() != LangOptions::NonGC) { 2772 GCAttrs = Ty.getObjCGCAttr(); 2773 // Default behavious under objective-c's gc is for objective-c pointers 2774 // (or pointers to them) be treated as though they were declared 2775 // as __strong. 2776 if (GCAttrs == QualType::GCNone) { 2777 if (isObjCObjectPointerType(Ty)) 2778 GCAttrs = QualType::Strong; 2779 else if (Ty->isPointerType()) 2780 return getObjCGCAttrKind(Ty->getAsPointerType()->getPointeeType()); 2781 } 2782 // Non-pointers have none gc'able attribute regardless of the attribute 2783 // set on them. 2784 else if (!isObjCObjectPointerType(Ty) && !Ty->isPointerType()) 2785 return QualType::GCNone; 2786 } 2787 return GCAttrs; 2788} 2789 2790//===----------------------------------------------------------------------===// 2791// Type Compatibility Testing 2792//===----------------------------------------------------------------------===// 2793 2794/// typesAreBlockCompatible - This routine is called when comparing two 2795/// block types. Types must be strictly compatible here. For example, 2796/// C unfortunately doesn't produce an error for the following: 2797/// 2798/// int (*emptyArgFunc)(); 2799/// int (*intArgList)(int) = emptyArgFunc; 2800/// 2801/// For blocks, we will produce an error for the following (similar to C++): 2802/// 2803/// int (^emptyArgBlock)(); 2804/// int (^intArgBlock)(int) = emptyArgBlock; 2805/// 2806/// FIXME: When the dust settles on this integration, fold this into mergeTypes. 2807/// 2808bool ASTContext::typesAreBlockCompatible(QualType lhs, QualType rhs) { 2809 const FunctionType *lbase = lhs->getAsFunctionType(); 2810 const FunctionType *rbase = rhs->getAsFunctionType(); 2811 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 2812 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 2813 if (lproto && rproto == 0) 2814 return false; 2815 return !mergeTypes(lhs, rhs).isNull(); 2816} 2817 2818/// areCompatVectorTypes - Return true if the two specified vector types are 2819/// compatible. 2820static bool areCompatVectorTypes(const VectorType *LHS, 2821 const VectorType *RHS) { 2822 assert(LHS->isCanonical() && RHS->isCanonical()); 2823 return LHS->getElementType() == RHS->getElementType() && 2824 LHS->getNumElements() == RHS->getNumElements(); 2825} 2826 2827/// canAssignObjCInterfaces - Return true if the two interface types are 2828/// compatible for assignment from RHS to LHS. This handles validation of any 2829/// protocol qualifiers on the LHS or RHS. 2830/// 2831bool ASTContext::canAssignObjCInterfaces(const ObjCInterfaceType *LHS, 2832 const ObjCInterfaceType *RHS) { 2833 // Verify that the base decls are compatible: the RHS must be a subclass of 2834 // the LHS. 2835 if (!LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 2836 return false; 2837 2838 // RHS must have a superset of the protocols in the LHS. If the LHS is not 2839 // protocol qualified at all, then we are good. 2840 if (!isa<ObjCQualifiedInterfaceType>(LHS)) 2841 return true; 2842 2843 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 2844 // isn't a superset. 2845 if (!isa<ObjCQualifiedInterfaceType>(RHS)) 2846 return true; // FIXME: should return false! 2847 2848 // Finally, we must have two protocol-qualified interfaces. 2849 const ObjCQualifiedInterfaceType *LHSP =cast<ObjCQualifiedInterfaceType>(LHS); 2850 const ObjCQualifiedInterfaceType *RHSP =cast<ObjCQualifiedInterfaceType>(RHS); 2851 2852 // All LHS protocols must have a presence on the RHS. 2853 assert(LHSP->qual_begin() != LHSP->qual_end() && "Empty LHS protocol list?"); 2854 2855 for (ObjCQualifiedInterfaceType::qual_iterator LHSPI = LHSP->qual_begin(), 2856 LHSPE = LHSP->qual_end(); 2857 LHSPI != LHSPE; LHSPI++) { 2858 bool RHSImplementsProtocol = false; 2859 2860 // If the RHS doesn't implement the protocol on the left, the types 2861 // are incompatible. 2862 for (ObjCQualifiedInterfaceType::qual_iterator RHSPI = RHSP->qual_begin(), 2863 RHSPE = RHSP->qual_end(); 2864 !RHSImplementsProtocol && (RHSPI != RHSPE); RHSPI++) { 2865 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) 2866 RHSImplementsProtocol = true; 2867 } 2868 // FIXME: For better diagnostics, consider passing back the protocol name. 2869 if (!RHSImplementsProtocol) 2870 return false; 2871 } 2872 // The RHS implements all protocols listed on the LHS. 2873 return true; 2874} 2875 2876bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 2877 // get the "pointed to" types 2878 const PointerType *LHSPT = LHS->getAsPointerType(); 2879 const PointerType *RHSPT = RHS->getAsPointerType(); 2880 2881 if (!LHSPT || !RHSPT) 2882 return false; 2883 2884 QualType lhptee = LHSPT->getPointeeType(); 2885 QualType rhptee = RHSPT->getPointeeType(); 2886 const ObjCInterfaceType* LHSIface = lhptee->getAsObjCInterfaceType(); 2887 const ObjCInterfaceType* RHSIface = rhptee->getAsObjCInterfaceType(); 2888 // ID acts sort of like void* for ObjC interfaces 2889 if (LHSIface && isObjCIdStructType(rhptee)) 2890 return true; 2891 if (RHSIface && isObjCIdStructType(lhptee)) 2892 return true; 2893 if (!LHSIface || !RHSIface) 2894 return false; 2895 return canAssignObjCInterfaces(LHSIface, RHSIface) || 2896 canAssignObjCInterfaces(RHSIface, LHSIface); 2897} 2898 2899/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 2900/// both shall have the identically qualified version of a compatible type. 2901/// C99 6.2.7p1: Two types have compatible types if their types are the 2902/// same. See 6.7.[2,3,5] for additional rules. 2903bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 2904 return !mergeTypes(LHS, RHS).isNull(); 2905} 2906 2907QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs) { 2908 const FunctionType *lbase = lhs->getAsFunctionType(); 2909 const FunctionType *rbase = rhs->getAsFunctionType(); 2910 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 2911 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 2912 bool allLTypes = true; 2913 bool allRTypes = true; 2914 2915 // Check return type 2916 QualType retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 2917 if (retType.isNull()) return QualType(); 2918 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 2919 allLTypes = false; 2920 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 2921 allRTypes = false; 2922 2923 if (lproto && rproto) { // two C99 style function prototypes 2924 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 2925 "C++ shouldn't be here"); 2926 unsigned lproto_nargs = lproto->getNumArgs(); 2927 unsigned rproto_nargs = rproto->getNumArgs(); 2928 2929 // Compatible functions must have the same number of arguments 2930 if (lproto_nargs != rproto_nargs) 2931 return QualType(); 2932 2933 // Variadic and non-variadic functions aren't compatible 2934 if (lproto->isVariadic() != rproto->isVariadic()) 2935 return QualType(); 2936 2937 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 2938 return QualType(); 2939 2940 // Check argument compatibility 2941 llvm::SmallVector<QualType, 10> types; 2942 for (unsigned i = 0; i < lproto_nargs; i++) { 2943 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 2944 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 2945 QualType argtype = mergeTypes(largtype, rargtype); 2946 if (argtype.isNull()) return QualType(); 2947 types.push_back(argtype); 2948 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 2949 allLTypes = false; 2950 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 2951 allRTypes = false; 2952 } 2953 if (allLTypes) return lhs; 2954 if (allRTypes) return rhs; 2955 return getFunctionType(retType, types.begin(), types.size(), 2956 lproto->isVariadic(), lproto->getTypeQuals()); 2957 } 2958 2959 if (lproto) allRTypes = false; 2960 if (rproto) allLTypes = false; 2961 2962 const FunctionProtoType *proto = lproto ? lproto : rproto; 2963 if (proto) { 2964 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 2965 if (proto->isVariadic()) return QualType(); 2966 // Check that the types are compatible with the types that 2967 // would result from default argument promotions (C99 6.7.5.3p15). 2968 // The only types actually affected are promotable integer 2969 // types and floats, which would be passed as a different 2970 // type depending on whether the prototype is visible. 2971 unsigned proto_nargs = proto->getNumArgs(); 2972 for (unsigned i = 0; i < proto_nargs; ++i) { 2973 QualType argTy = proto->getArgType(i); 2974 if (argTy->isPromotableIntegerType() || 2975 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 2976 return QualType(); 2977 } 2978 2979 if (allLTypes) return lhs; 2980 if (allRTypes) return rhs; 2981 return getFunctionType(retType, proto->arg_type_begin(), 2982 proto->getNumArgs(), lproto->isVariadic(), 2983 lproto->getTypeQuals()); 2984 } 2985 2986 if (allLTypes) return lhs; 2987 if (allRTypes) return rhs; 2988 return getFunctionNoProtoType(retType); 2989} 2990 2991QualType ASTContext::mergeTypes(QualType LHS, QualType RHS) { 2992 // C++ [expr]: If an expression initially has the type "reference to T", the 2993 // type is adjusted to "T" prior to any further analysis, the expression 2994 // designates the object or function denoted by the reference, and the 2995 // expression is an lvalue unless the reference is an rvalue reference and 2996 // the expression is a function call (possibly inside parentheses). 2997 // FIXME: C++ shouldn't be going through here! The rules are different 2998 // enough that they should be handled separately. 2999 // FIXME: Merging of lvalue and rvalue references is incorrect. C++ *really* 3000 // shouldn't be going through here! 3001 if (const ReferenceType *RT = LHS->getAsReferenceType()) 3002 LHS = RT->getPointeeType(); 3003 if (const ReferenceType *RT = RHS->getAsReferenceType()) 3004 RHS = RT->getPointeeType(); 3005 3006 QualType LHSCan = getCanonicalType(LHS), 3007 RHSCan = getCanonicalType(RHS); 3008 3009 // If two types are identical, they are compatible. 3010 if (LHSCan == RHSCan) 3011 return LHS; 3012 3013 // If the qualifiers are different, the types aren't compatible 3014 // Note that we handle extended qualifiers later, in the 3015 // case for ExtQualType. 3016 if (LHSCan.getCVRQualifiers() != RHSCan.getCVRQualifiers()) 3017 return QualType(); 3018 3019 Type::TypeClass LHSClass = LHSCan.getUnqualifiedType()->getTypeClass(); 3020 Type::TypeClass RHSClass = RHSCan.getUnqualifiedType()->getTypeClass(); 3021 3022 // We want to consider the two function types to be the same for these 3023 // comparisons, just force one to the other. 3024 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 3025 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 3026 3027 // Same as above for arrays 3028 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 3029 LHSClass = Type::ConstantArray; 3030 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 3031 RHSClass = Type::ConstantArray; 3032 3033 // Canonicalize ExtVector -> Vector. 3034 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 3035 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 3036 3037 // Consider qualified interfaces and interfaces the same. 3038 if (LHSClass == Type::ObjCQualifiedInterface) LHSClass = Type::ObjCInterface; 3039 if (RHSClass == Type::ObjCQualifiedInterface) RHSClass = Type::ObjCInterface; 3040 3041 // If the canonical type classes don't match. 3042 if (LHSClass != RHSClass) { 3043 const ObjCInterfaceType* LHSIface = LHS->getAsObjCInterfaceType(); 3044 const ObjCInterfaceType* RHSIface = RHS->getAsObjCInterfaceType(); 3045 3046 // 'id' and 'Class' act sort of like void* for ObjC interfaces 3047 if (LHSIface && (isObjCIdStructType(RHS) || isObjCClassStructType(RHS))) 3048 return LHS; 3049 if (RHSIface && (isObjCIdStructType(LHS) || isObjCClassStructType(LHS))) 3050 return RHS; 3051 3052 // ID is compatible with all qualified id types. 3053 if (LHS->isObjCQualifiedIdType()) { 3054 if (const PointerType *PT = RHS->getAsPointerType()) { 3055 QualType pType = PT->getPointeeType(); 3056 if (isObjCIdStructType(pType) || isObjCClassStructType(pType)) 3057 return LHS; 3058 // FIXME: need to use ObjCQualifiedIdTypesAreCompatible(LHS, RHS, true). 3059 // Unfortunately, this API is part of Sema (which we don't have access 3060 // to. Need to refactor. The following check is insufficient, since we 3061 // need to make sure the class implements the protocol. 3062 if (pType->isObjCInterfaceType()) 3063 return LHS; 3064 } 3065 } 3066 if (RHS->isObjCQualifiedIdType()) { 3067 if (const PointerType *PT = LHS->getAsPointerType()) { 3068 QualType pType = PT->getPointeeType(); 3069 if (isObjCIdStructType(pType) || isObjCClassStructType(pType)) 3070 return RHS; 3071 // FIXME: need to use ObjCQualifiedIdTypesAreCompatible(LHS, RHS, true). 3072 // Unfortunately, this API is part of Sema (which we don't have access 3073 // to. Need to refactor. The following check is insufficient, since we 3074 // need to make sure the class implements the protocol. 3075 if (pType->isObjCInterfaceType()) 3076 return RHS; 3077 } 3078 } 3079 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 3080 // a signed integer type, or an unsigned integer type. 3081 if (const EnumType* ETy = LHS->getAsEnumType()) { 3082 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 3083 return RHS; 3084 } 3085 if (const EnumType* ETy = RHS->getAsEnumType()) { 3086 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 3087 return LHS; 3088 } 3089 3090 return QualType(); 3091 } 3092 3093 // The canonical type classes match. 3094 switch (LHSClass) { 3095#define TYPE(Class, Base) 3096#define ABSTRACT_TYPE(Class, Base) 3097#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 3098#define DEPENDENT_TYPE(Class, Base) case Type::Class: 3099#include "clang/AST/TypeNodes.def" 3100 assert(false && "Non-canonical and dependent types shouldn't get here"); 3101 return QualType(); 3102 3103 case Type::LValueReference: 3104 case Type::RValueReference: 3105 case Type::MemberPointer: 3106 assert(false && "C++ should never be in mergeTypes"); 3107 return QualType(); 3108 3109 case Type::IncompleteArray: 3110 case Type::VariableArray: 3111 case Type::FunctionProto: 3112 case Type::ExtVector: 3113 case Type::ObjCQualifiedInterface: 3114 assert(false && "Types are eliminated above"); 3115 return QualType(); 3116 3117 case Type::Pointer: 3118 { 3119 // Merge two pointer types, while trying to preserve typedef info 3120 QualType LHSPointee = LHS->getAsPointerType()->getPointeeType(); 3121 QualType RHSPointee = RHS->getAsPointerType()->getPointeeType(); 3122 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 3123 if (ResultType.isNull()) return QualType(); 3124 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 3125 return LHS; 3126 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 3127 return RHS; 3128 return getPointerType(ResultType); 3129 } 3130 case Type::BlockPointer: 3131 { 3132 // Merge two block pointer types, while trying to preserve typedef info 3133 QualType LHSPointee = LHS->getAsBlockPointerType()->getPointeeType(); 3134 QualType RHSPointee = RHS->getAsBlockPointerType()->getPointeeType(); 3135 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 3136 if (ResultType.isNull()) return QualType(); 3137 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 3138 return LHS; 3139 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 3140 return RHS; 3141 return getBlockPointerType(ResultType); 3142 } 3143 case Type::ConstantArray: 3144 { 3145 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 3146 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 3147 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 3148 return QualType(); 3149 3150 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 3151 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 3152 QualType ResultType = mergeTypes(LHSElem, RHSElem); 3153 if (ResultType.isNull()) return QualType(); 3154 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 3155 return LHS; 3156 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 3157 return RHS; 3158 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 3159 ArrayType::ArraySizeModifier(), 0); 3160 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 3161 ArrayType::ArraySizeModifier(), 0); 3162 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 3163 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 3164 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 3165 return LHS; 3166 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 3167 return RHS; 3168 if (LVAT) { 3169 // FIXME: This isn't correct! But tricky to implement because 3170 // the array's size has to be the size of LHS, but the type 3171 // has to be different. 3172 return LHS; 3173 } 3174 if (RVAT) { 3175 // FIXME: This isn't correct! But tricky to implement because 3176 // the array's size has to be the size of RHS, but the type 3177 // has to be different. 3178 return RHS; 3179 } 3180 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 3181 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 3182 return getIncompleteArrayType(ResultType, ArrayType::ArraySizeModifier(),0); 3183 } 3184 case Type::FunctionNoProto: 3185 return mergeFunctionTypes(LHS, RHS); 3186 case Type::Record: 3187 case Type::Enum: 3188 // FIXME: Why are these compatible? 3189 if (isObjCIdStructType(LHS) && isObjCClassStructType(RHS)) return LHS; 3190 if (isObjCClassStructType(LHS) && isObjCIdStructType(RHS)) return LHS; 3191 return QualType(); 3192 case Type::Builtin: 3193 // Only exactly equal builtin types are compatible, which is tested above. 3194 return QualType(); 3195 case Type::Complex: 3196 // Distinct complex types are incompatible. 3197 return QualType(); 3198 case Type::Vector: 3199 // FIXME: The merged type should be an ExtVector! 3200 if (areCompatVectorTypes(LHS->getAsVectorType(), RHS->getAsVectorType())) 3201 return LHS; 3202 return QualType(); 3203 case Type::ObjCInterface: { 3204 // Check if the interfaces are assignment compatible. 3205 // FIXME: This should be type compatibility, e.g. whether 3206 // "LHS x; RHS x;" at global scope is legal. 3207 const ObjCInterfaceType* LHSIface = LHS->getAsObjCInterfaceType(); 3208 const ObjCInterfaceType* RHSIface = RHS->getAsObjCInterfaceType(); 3209 if (LHSIface && RHSIface && 3210 canAssignObjCInterfaces(LHSIface, RHSIface)) 3211 return LHS; 3212 3213 return QualType(); 3214 } 3215 case Type::ObjCQualifiedId: 3216 // Distinct qualified id's are not compatible. 3217 return QualType(); 3218 case Type::FixedWidthInt: 3219 // Distinct fixed-width integers are not compatible. 3220 return QualType(); 3221 case Type::ExtQual: 3222 // FIXME: ExtQual types can be compatible even if they're not 3223 // identical! 3224 return QualType(); 3225 // First attempt at an implementation, but I'm not really sure it's 3226 // right... 3227#if 0 3228 ExtQualType* LQual = cast<ExtQualType>(LHSCan); 3229 ExtQualType* RQual = cast<ExtQualType>(RHSCan); 3230 if (LQual->getAddressSpace() != RQual->getAddressSpace() || 3231 LQual->getObjCGCAttr() != RQual->getObjCGCAttr()) 3232 return QualType(); 3233 QualType LHSBase, RHSBase, ResultType, ResCanUnqual; 3234 LHSBase = QualType(LQual->getBaseType(), 0); 3235 RHSBase = QualType(RQual->getBaseType(), 0); 3236 ResultType = mergeTypes(LHSBase, RHSBase); 3237 if (ResultType.isNull()) return QualType(); 3238 ResCanUnqual = getCanonicalType(ResultType).getUnqualifiedType(); 3239 if (LHSCan.getUnqualifiedType() == ResCanUnqual) 3240 return LHS; 3241 if (RHSCan.getUnqualifiedType() == ResCanUnqual) 3242 return RHS; 3243 ResultType = getAddrSpaceQualType(ResultType, LQual->getAddressSpace()); 3244 ResultType = getObjCGCQualType(ResultType, LQual->getObjCGCAttr()); 3245 ResultType.setCVRQualifiers(LHSCan.getCVRQualifiers()); 3246 return ResultType; 3247#endif 3248 3249 case Type::TemplateSpecialization: 3250 assert(false && "Dependent types have no size"); 3251 break; 3252 } 3253 3254 return QualType(); 3255} 3256 3257//===----------------------------------------------------------------------===// 3258// Integer Predicates 3259//===----------------------------------------------------------------------===// 3260 3261unsigned ASTContext::getIntWidth(QualType T) { 3262 if (T == BoolTy) 3263 return 1; 3264 if (FixedWidthIntType* FWIT = dyn_cast<FixedWidthIntType>(T)) { 3265 return FWIT->getWidth(); 3266 } 3267 // For builtin types, just use the standard type sizing method 3268 return (unsigned)getTypeSize(T); 3269} 3270 3271QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 3272 assert(T->isSignedIntegerType() && "Unexpected type"); 3273 if (const EnumType* ETy = T->getAsEnumType()) 3274 T = ETy->getDecl()->getIntegerType(); 3275 const BuiltinType* BTy = T->getAsBuiltinType(); 3276 assert (BTy && "Unexpected signed integer type"); 3277 switch (BTy->getKind()) { 3278 case BuiltinType::Char_S: 3279 case BuiltinType::SChar: 3280 return UnsignedCharTy; 3281 case BuiltinType::Short: 3282 return UnsignedShortTy; 3283 case BuiltinType::Int: 3284 return UnsignedIntTy; 3285 case BuiltinType::Long: 3286 return UnsignedLongTy; 3287 case BuiltinType::LongLong: 3288 return UnsignedLongLongTy; 3289 case BuiltinType::Int128: 3290 return UnsignedInt128Ty; 3291 default: 3292 assert(0 && "Unexpected signed integer type"); 3293 return QualType(); 3294 } 3295} 3296 3297ExternalASTSource::~ExternalASTSource() { } 3298 3299void ExternalASTSource::PrintStats() { } 3300