ASTContext.cpp revision f968d8374791c37bc464efd9168c2d33dd73605f
1//===--- ASTContext.cpp - Context to hold long-lived AST nodes ------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements the ASTContext interface. 11// 12//===----------------------------------------------------------------------===// 13 14#include "clang/AST/ASTContext.h" 15#include "clang/AST/CharUnits.h" 16#include "clang/AST/DeclCXX.h" 17#include "clang/AST/DeclObjC.h" 18#include "clang/AST/DeclTemplate.h" 19#include "clang/AST/TypeLoc.h" 20#include "clang/AST/Expr.h" 21#include "clang/AST/ExprCXX.h" 22#include "clang/AST/ExternalASTSource.h" 23#include "clang/AST/ASTMutationListener.h" 24#include "clang/AST/RecordLayout.h" 25#include "clang/AST/Mangle.h" 26#include "clang/Basic/Builtins.h" 27#include "clang/Basic/SourceManager.h" 28#include "clang/Basic/TargetInfo.h" 29#include "llvm/ADT/SmallString.h" 30#include "llvm/ADT/StringExtras.h" 31#include "llvm/Support/MathExtras.h" 32#include "llvm/Support/raw_ostream.h" 33#include "CXXABI.h" 34#include <map> 35 36using namespace clang; 37 38unsigned ASTContext::NumImplicitDefaultConstructors; 39unsigned ASTContext::NumImplicitDefaultConstructorsDeclared; 40unsigned ASTContext::NumImplicitCopyConstructors; 41unsigned ASTContext::NumImplicitCopyConstructorsDeclared; 42unsigned ASTContext::NumImplicitMoveConstructors; 43unsigned ASTContext::NumImplicitMoveConstructorsDeclared; 44unsigned ASTContext::NumImplicitCopyAssignmentOperators; 45unsigned ASTContext::NumImplicitCopyAssignmentOperatorsDeclared; 46unsigned ASTContext::NumImplicitMoveAssignmentOperators; 47unsigned ASTContext::NumImplicitMoveAssignmentOperatorsDeclared; 48unsigned ASTContext::NumImplicitDestructors; 49unsigned ASTContext::NumImplicitDestructorsDeclared; 50 51enum FloatingRank { 52 FloatRank, DoubleRank, LongDoubleRank 53}; 54 55void 56ASTContext::CanonicalTemplateTemplateParm::Profile(llvm::FoldingSetNodeID &ID, 57 TemplateTemplateParmDecl *Parm) { 58 ID.AddInteger(Parm->getDepth()); 59 ID.AddInteger(Parm->getPosition()); 60 ID.AddBoolean(Parm->isParameterPack()); 61 62 TemplateParameterList *Params = Parm->getTemplateParameters(); 63 ID.AddInteger(Params->size()); 64 for (TemplateParameterList::const_iterator P = Params->begin(), 65 PEnd = Params->end(); 66 P != PEnd; ++P) { 67 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) { 68 ID.AddInteger(0); 69 ID.AddBoolean(TTP->isParameterPack()); 70 continue; 71 } 72 73 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 74 ID.AddInteger(1); 75 ID.AddBoolean(NTTP->isParameterPack()); 76 ID.AddPointer(NTTP->getType().getAsOpaquePtr()); 77 if (NTTP->isExpandedParameterPack()) { 78 ID.AddBoolean(true); 79 ID.AddInteger(NTTP->getNumExpansionTypes()); 80 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) 81 ID.AddPointer(NTTP->getExpansionType(I).getAsOpaquePtr()); 82 } else 83 ID.AddBoolean(false); 84 continue; 85 } 86 87 TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P); 88 ID.AddInteger(2); 89 Profile(ID, TTP); 90 } 91} 92 93TemplateTemplateParmDecl * 94ASTContext::getCanonicalTemplateTemplateParmDecl( 95 TemplateTemplateParmDecl *TTP) const { 96 // Check if we already have a canonical template template parameter. 97 llvm::FoldingSetNodeID ID; 98 CanonicalTemplateTemplateParm::Profile(ID, TTP); 99 void *InsertPos = 0; 100 CanonicalTemplateTemplateParm *Canonical 101 = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 102 if (Canonical) 103 return Canonical->getParam(); 104 105 // Build a canonical template parameter list. 106 TemplateParameterList *Params = TTP->getTemplateParameters(); 107 llvm::SmallVector<NamedDecl *, 4> CanonParams; 108 CanonParams.reserve(Params->size()); 109 for (TemplateParameterList::const_iterator P = Params->begin(), 110 PEnd = Params->end(); 111 P != PEnd; ++P) { 112 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) 113 CanonParams.push_back( 114 TemplateTypeParmDecl::Create(*this, getTranslationUnitDecl(), 115 SourceLocation(), 116 SourceLocation(), 117 TTP->getDepth(), 118 TTP->getIndex(), 0, false, 119 TTP->isParameterPack())); 120 else if (NonTypeTemplateParmDecl *NTTP 121 = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 122 QualType T = getCanonicalType(NTTP->getType()); 123 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(T); 124 NonTypeTemplateParmDecl *Param; 125 if (NTTP->isExpandedParameterPack()) { 126 llvm::SmallVector<QualType, 2> ExpandedTypes; 127 llvm::SmallVector<TypeSourceInfo *, 2> ExpandedTInfos; 128 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) { 129 ExpandedTypes.push_back(getCanonicalType(NTTP->getExpansionType(I))); 130 ExpandedTInfos.push_back( 131 getTrivialTypeSourceInfo(ExpandedTypes.back())); 132 } 133 134 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 135 SourceLocation(), 136 SourceLocation(), 137 NTTP->getDepth(), 138 NTTP->getPosition(), 0, 139 T, 140 TInfo, 141 ExpandedTypes.data(), 142 ExpandedTypes.size(), 143 ExpandedTInfos.data()); 144 } else { 145 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 146 SourceLocation(), 147 SourceLocation(), 148 NTTP->getDepth(), 149 NTTP->getPosition(), 0, 150 T, 151 NTTP->isParameterPack(), 152 TInfo); 153 } 154 CanonParams.push_back(Param); 155 156 } else 157 CanonParams.push_back(getCanonicalTemplateTemplateParmDecl( 158 cast<TemplateTemplateParmDecl>(*P))); 159 } 160 161 TemplateTemplateParmDecl *CanonTTP 162 = TemplateTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 163 SourceLocation(), TTP->getDepth(), 164 TTP->getPosition(), 165 TTP->isParameterPack(), 166 0, 167 TemplateParameterList::Create(*this, SourceLocation(), 168 SourceLocation(), 169 CanonParams.data(), 170 CanonParams.size(), 171 SourceLocation())); 172 173 // Get the new insert position for the node we care about. 174 Canonical = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 175 assert(Canonical == 0 && "Shouldn't be in the map!"); 176 (void)Canonical; 177 178 // Create the canonical template template parameter entry. 179 Canonical = new (*this) CanonicalTemplateTemplateParm(CanonTTP); 180 CanonTemplateTemplateParms.InsertNode(Canonical, InsertPos); 181 return CanonTTP; 182} 183 184CXXABI *ASTContext::createCXXABI(const TargetInfo &T) { 185 if (!LangOpts.CPlusPlus) return 0; 186 187 switch (T.getCXXABI()) { 188 case CXXABI_ARM: 189 return CreateARMCXXABI(*this); 190 case CXXABI_Itanium: 191 return CreateItaniumCXXABI(*this); 192 case CXXABI_Microsoft: 193 return CreateMicrosoftCXXABI(*this); 194 } 195 return 0; 196} 197 198static const LangAS::Map &getAddressSpaceMap(const TargetInfo &T, 199 const LangOptions &LOpts) { 200 if (LOpts.FakeAddressSpaceMap) { 201 // The fake address space map must have a distinct entry for each 202 // language-specific address space. 203 static const unsigned FakeAddrSpaceMap[] = { 204 1, // opencl_global 205 2, // opencl_local 206 3 // opencl_constant 207 }; 208 return FakeAddrSpaceMap; 209 } else { 210 return T.getAddressSpaceMap(); 211 } 212} 213 214ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 215 const TargetInfo &t, 216 IdentifierTable &idents, SelectorTable &sels, 217 Builtin::Context &builtins, 218 unsigned size_reserve) : 219 FunctionProtoTypes(this_()), 220 TemplateSpecializationTypes(this_()), 221 DependentTemplateSpecializationTypes(this_()), 222 GlobalNestedNameSpecifier(0), IsInt128Installed(false), 223 CFConstantStringTypeDecl(0), NSConstantStringTypeDecl(0), 224 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 225 sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 226 cudaConfigureCallDecl(0), 227 NullTypeSourceInfo(QualType()), 228 SourceMgr(SM), LangOpts(LOpts), ABI(createCXXABI(t)), 229 AddrSpaceMap(getAddressSpaceMap(t, LOpts)), Target(t), 230 Idents(idents), Selectors(sels), 231 BuiltinInfo(builtins), 232 DeclarationNames(*this), 233 ExternalSource(0), Listener(0), PrintingPolicy(LOpts), 234 LastSDM(0, 0), 235 UniqueBlockByRefTypeID(0) { 236 ObjCIdRedefinitionType = QualType(); 237 ObjCClassRedefinitionType = QualType(); 238 ObjCSelRedefinitionType = QualType(); 239 if (size_reserve > 0) Types.reserve(size_reserve); 240 TUDecl = TranslationUnitDecl::Create(*this); 241 InitBuiltinTypes(); 242} 243 244ASTContext::~ASTContext() { 245 // Release the DenseMaps associated with DeclContext objects. 246 // FIXME: Is this the ideal solution? 247 ReleaseDeclContextMaps(); 248 249 // Call all of the deallocation functions. 250 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 251 Deallocations[I].first(Deallocations[I].second); 252 253 // Release all of the memory associated with overridden C++ methods. 254 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 255 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 256 OM != OMEnd; ++OM) 257 OM->second.Destroy(); 258 259 // ASTRecordLayout objects in ASTRecordLayouts must always be destroyed 260 // because they can contain DenseMaps. 261 for (llvm::DenseMap<const ObjCContainerDecl*, 262 const ASTRecordLayout*>::iterator 263 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) 264 // Increment in loop to prevent using deallocated memory. 265 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 266 R->Destroy(*this); 267 268 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 269 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 270 // Increment in loop to prevent using deallocated memory. 271 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 272 R->Destroy(*this); 273 } 274 275 for (llvm::DenseMap<const Decl*, AttrVec*>::iterator A = DeclAttrs.begin(), 276 AEnd = DeclAttrs.end(); 277 A != AEnd; ++A) 278 A->second->~AttrVec(); 279} 280 281void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 282 Deallocations.push_back(std::make_pair(Callback, Data)); 283} 284 285void 286ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 287 ExternalSource.reset(Source.take()); 288} 289 290void ASTContext::PrintStats() const { 291 fprintf(stderr, "*** AST Context Stats:\n"); 292 fprintf(stderr, " %d types total.\n", (int)Types.size()); 293 294 unsigned counts[] = { 295#define TYPE(Name, Parent) 0, 296#define ABSTRACT_TYPE(Name, Parent) 297#include "clang/AST/TypeNodes.def" 298 0 // Extra 299 }; 300 301 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 302 Type *T = Types[i]; 303 counts[(unsigned)T->getTypeClass()]++; 304 } 305 306 unsigned Idx = 0; 307 unsigned TotalBytes = 0; 308#define TYPE(Name, Parent) \ 309 if (counts[Idx]) \ 310 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 311 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 312 ++Idx; 313#define ABSTRACT_TYPE(Name, Parent) 314#include "clang/AST/TypeNodes.def" 315 316 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 317 318 // Implicit special member functions. 319 fprintf(stderr, " %u/%u implicit default constructors created\n", 320 NumImplicitDefaultConstructorsDeclared, 321 NumImplicitDefaultConstructors); 322 fprintf(stderr, " %u/%u implicit copy constructors created\n", 323 NumImplicitCopyConstructorsDeclared, 324 NumImplicitCopyConstructors); 325 if (getLangOptions().CPlusPlus) 326 fprintf(stderr, " %u/%u implicit move constructors created\n", 327 NumImplicitMoveConstructorsDeclared, 328 NumImplicitMoveConstructors); 329 fprintf(stderr, " %u/%u implicit copy assignment operators created\n", 330 NumImplicitCopyAssignmentOperatorsDeclared, 331 NumImplicitCopyAssignmentOperators); 332 if (getLangOptions().CPlusPlus) 333 fprintf(stderr, " %u/%u implicit move assignment operators created\n", 334 NumImplicitMoveAssignmentOperatorsDeclared, 335 NumImplicitMoveAssignmentOperators); 336 fprintf(stderr, " %u/%u implicit destructors created\n", 337 NumImplicitDestructorsDeclared, NumImplicitDestructors); 338 339 if (ExternalSource.get()) { 340 fprintf(stderr, "\n"); 341 ExternalSource->PrintStats(); 342 } 343 344 BumpAlloc.PrintStats(); 345} 346 347 348void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 349 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 350 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 351 Types.push_back(Ty); 352} 353 354void ASTContext::InitBuiltinTypes() { 355 assert(VoidTy.isNull() && "Context reinitialized?"); 356 357 // C99 6.2.5p19. 358 InitBuiltinType(VoidTy, BuiltinType::Void); 359 360 // C99 6.2.5p2. 361 InitBuiltinType(BoolTy, BuiltinType::Bool); 362 // C99 6.2.5p3. 363 if (LangOpts.CharIsSigned) 364 InitBuiltinType(CharTy, BuiltinType::Char_S); 365 else 366 InitBuiltinType(CharTy, BuiltinType::Char_U); 367 // C99 6.2.5p4. 368 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 369 InitBuiltinType(ShortTy, BuiltinType::Short); 370 InitBuiltinType(IntTy, BuiltinType::Int); 371 InitBuiltinType(LongTy, BuiltinType::Long); 372 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 373 374 // C99 6.2.5p6. 375 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 376 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 377 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 378 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 379 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 380 381 // C99 6.2.5p10. 382 InitBuiltinType(FloatTy, BuiltinType::Float); 383 InitBuiltinType(DoubleTy, BuiltinType::Double); 384 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 385 386 // GNU extension, 128-bit integers. 387 InitBuiltinType(Int128Ty, BuiltinType::Int128); 388 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 389 390 if (LangOpts.CPlusPlus) { // C++ 3.9.1p5 391 if (TargetInfo::isTypeSigned(Target.getWCharType())) 392 InitBuiltinType(WCharTy, BuiltinType::WChar_S); 393 else // -fshort-wchar makes wchar_t be unsigned. 394 InitBuiltinType(WCharTy, BuiltinType::WChar_U); 395 } else // C99 396 WCharTy = getFromTargetType(Target.getWCharType()); 397 398 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 399 InitBuiltinType(Char16Ty, BuiltinType::Char16); 400 else // C99 401 Char16Ty = getFromTargetType(Target.getChar16Type()); 402 403 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 404 InitBuiltinType(Char32Ty, BuiltinType::Char32); 405 else // C99 406 Char32Ty = getFromTargetType(Target.getChar32Type()); 407 408 // Placeholder type for type-dependent expressions whose type is 409 // completely unknown. No code should ever check a type against 410 // DependentTy and users should never see it; however, it is here to 411 // help diagnose failures to properly check for type-dependent 412 // expressions. 413 InitBuiltinType(DependentTy, BuiltinType::Dependent); 414 415 // Placeholder type for functions. 416 InitBuiltinType(OverloadTy, BuiltinType::Overload); 417 418 // Placeholder type for bound members. 419 InitBuiltinType(BoundMemberTy, BuiltinType::BoundMember); 420 421 // "any" type; useful for debugger-like clients. 422 InitBuiltinType(UnknownAnyTy, BuiltinType::UnknownAny); 423 424 // C99 6.2.5p11. 425 FloatComplexTy = getComplexType(FloatTy); 426 DoubleComplexTy = getComplexType(DoubleTy); 427 LongDoubleComplexTy = getComplexType(LongDoubleTy); 428 429 BuiltinVaListType = QualType(); 430 431 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 432 ObjCIdTypedefType = QualType(); 433 ObjCClassTypedefType = QualType(); 434 ObjCSelTypedefType = QualType(); 435 436 // Builtin types for 'id', 'Class', and 'SEL'. 437 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 438 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 439 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 440 441 ObjCConstantStringType = QualType(); 442 443 // void * type 444 VoidPtrTy = getPointerType(VoidTy); 445 446 // nullptr type (C++0x 2.14.7) 447 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 448} 449 450Diagnostic &ASTContext::getDiagnostics() const { 451 return SourceMgr.getDiagnostics(); 452} 453 454AttrVec& ASTContext::getDeclAttrs(const Decl *D) { 455 AttrVec *&Result = DeclAttrs[D]; 456 if (!Result) { 457 void *Mem = Allocate(sizeof(AttrVec)); 458 Result = new (Mem) AttrVec; 459 } 460 461 return *Result; 462} 463 464/// \brief Erase the attributes corresponding to the given declaration. 465void ASTContext::eraseDeclAttrs(const Decl *D) { 466 llvm::DenseMap<const Decl*, AttrVec*>::iterator Pos = DeclAttrs.find(D); 467 if (Pos != DeclAttrs.end()) { 468 Pos->second->~AttrVec(); 469 DeclAttrs.erase(Pos); 470 } 471} 472 473MemberSpecializationInfo * 474ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 475 assert(Var->isStaticDataMember() && "Not a static data member"); 476 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 477 = InstantiatedFromStaticDataMember.find(Var); 478 if (Pos == InstantiatedFromStaticDataMember.end()) 479 return 0; 480 481 return Pos->second; 482} 483 484void 485ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 486 TemplateSpecializationKind TSK, 487 SourceLocation PointOfInstantiation) { 488 assert(Inst->isStaticDataMember() && "Not a static data member"); 489 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 490 assert(!InstantiatedFromStaticDataMember[Inst] && 491 "Already noted what static data member was instantiated from"); 492 InstantiatedFromStaticDataMember[Inst] 493 = new (*this) MemberSpecializationInfo(Tmpl, TSK, PointOfInstantiation); 494} 495 496NamedDecl * 497ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 498 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 499 = InstantiatedFromUsingDecl.find(UUD); 500 if (Pos == InstantiatedFromUsingDecl.end()) 501 return 0; 502 503 return Pos->second; 504} 505 506void 507ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 508 assert((isa<UsingDecl>(Pattern) || 509 isa<UnresolvedUsingValueDecl>(Pattern) || 510 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 511 "pattern decl is not a using decl"); 512 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 513 InstantiatedFromUsingDecl[Inst] = Pattern; 514} 515 516UsingShadowDecl * 517ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 518 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 519 = InstantiatedFromUsingShadowDecl.find(Inst); 520 if (Pos == InstantiatedFromUsingShadowDecl.end()) 521 return 0; 522 523 return Pos->second; 524} 525 526void 527ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 528 UsingShadowDecl *Pattern) { 529 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 530 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 531} 532 533FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 534 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 535 = InstantiatedFromUnnamedFieldDecl.find(Field); 536 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 537 return 0; 538 539 return Pos->second; 540} 541 542void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 543 FieldDecl *Tmpl) { 544 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 545 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 546 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 547 "Already noted what unnamed field was instantiated from"); 548 549 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 550} 551 552bool ASTContext::ZeroBitfieldFollowsNonBitfield(const FieldDecl *FD, 553 const FieldDecl *LastFD) const { 554 return (FD->isBitField() && LastFD && !LastFD->isBitField() && 555 FD->getBitWidth()-> EvaluateAsInt(*this).getZExtValue() == 0); 556 557} 558 559bool ASTContext::ZeroBitfieldFollowsBitfield(const FieldDecl *FD, 560 const FieldDecl *LastFD) const { 561 return (FD->isBitField() && LastFD && LastFD->isBitField() && 562 FD->getBitWidth()-> EvaluateAsInt(*this).getZExtValue() == 0 && 563 LastFD->getBitWidth()-> EvaluateAsInt(*this).getZExtValue() != 0); 564 565} 566 567bool ASTContext::BitfieldFollowsBitfield(const FieldDecl *FD, 568 const FieldDecl *LastFD) const { 569 return (FD->isBitField() && LastFD && LastFD->isBitField() && 570 FD->getBitWidth()-> EvaluateAsInt(*this).getZExtValue() && 571 LastFD->getBitWidth()-> EvaluateAsInt(*this).getZExtValue()); 572} 573 574bool ASTContext::NoneBitfieldFollowsBitfield(const FieldDecl *FD, 575 const FieldDecl *LastFD) const { 576 return (!FD->isBitField() && LastFD && LastFD->isBitField() && 577 LastFD->getBitWidth()-> EvaluateAsInt(*this).getZExtValue()); 578} 579 580bool ASTContext::BitfieldFollowsNoneBitfield(const FieldDecl *FD, 581 const FieldDecl *LastFD) const { 582 return (FD->isBitField() && LastFD && !LastFD->isBitField() && 583 FD->getBitWidth()-> EvaluateAsInt(*this).getZExtValue()); 584} 585 586ASTContext::overridden_cxx_method_iterator 587ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 588 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 589 = OverriddenMethods.find(Method); 590 if (Pos == OverriddenMethods.end()) 591 return 0; 592 593 return Pos->second.begin(); 594} 595 596ASTContext::overridden_cxx_method_iterator 597ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 598 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 599 = OverriddenMethods.find(Method); 600 if (Pos == OverriddenMethods.end()) 601 return 0; 602 603 return Pos->second.end(); 604} 605 606unsigned 607ASTContext::overridden_methods_size(const CXXMethodDecl *Method) const { 608 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 609 = OverriddenMethods.find(Method); 610 if (Pos == OverriddenMethods.end()) 611 return 0; 612 613 return Pos->second.size(); 614} 615 616void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 617 const CXXMethodDecl *Overridden) { 618 OverriddenMethods[Method].push_back(Overridden); 619} 620 621//===----------------------------------------------------------------------===// 622// Type Sizing and Analysis 623//===----------------------------------------------------------------------===// 624 625/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 626/// scalar floating point type. 627const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 628 const BuiltinType *BT = T->getAs<BuiltinType>(); 629 assert(BT && "Not a floating point type!"); 630 switch (BT->getKind()) { 631 default: assert(0 && "Not a floating point type!"); 632 case BuiltinType::Float: return Target.getFloatFormat(); 633 case BuiltinType::Double: return Target.getDoubleFormat(); 634 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 635 } 636} 637 638/// getDeclAlign - Return a conservative estimate of the alignment of the 639/// specified decl. Note that bitfields do not have a valid alignment, so 640/// this method will assert on them. 641/// If @p RefAsPointee, references are treated like their underlying type 642/// (for alignof), else they're treated like pointers (for CodeGen). 643CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) const { 644 unsigned Align = Target.getCharWidth(); 645 646 bool UseAlignAttrOnly = false; 647 if (unsigned AlignFromAttr = D->getMaxAlignment()) { 648 Align = AlignFromAttr; 649 650 // __attribute__((aligned)) can increase or decrease alignment 651 // *except* on a struct or struct member, where it only increases 652 // alignment unless 'packed' is also specified. 653 // 654 // It is an error for [[align]] to decrease alignment, so we can 655 // ignore that possibility; Sema should diagnose it. 656 if (isa<FieldDecl>(D)) { 657 UseAlignAttrOnly = D->hasAttr<PackedAttr>() || 658 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 659 } else { 660 UseAlignAttrOnly = true; 661 } 662 } 663 else if (isa<FieldDecl>(D)) 664 UseAlignAttrOnly = 665 D->hasAttr<PackedAttr>() || 666 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 667 668 // If we're using the align attribute only, just ignore everything 669 // else about the declaration and its type. 670 if (UseAlignAttrOnly) { 671 // do nothing 672 673 } else if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 674 QualType T = VD->getType(); 675 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 676 if (RefAsPointee) 677 T = RT->getPointeeType(); 678 else 679 T = getPointerType(RT->getPointeeType()); 680 } 681 if (!T->isIncompleteType() && !T->isFunctionType()) { 682 // Adjust alignments of declarations with array type by the 683 // large-array alignment on the target. 684 unsigned MinWidth = Target.getLargeArrayMinWidth(); 685 const ArrayType *arrayType; 686 if (MinWidth && (arrayType = getAsArrayType(T))) { 687 if (isa<VariableArrayType>(arrayType)) 688 Align = std::max(Align, Target.getLargeArrayAlign()); 689 else if (isa<ConstantArrayType>(arrayType) && 690 MinWidth <= getTypeSize(cast<ConstantArrayType>(arrayType))) 691 Align = std::max(Align, Target.getLargeArrayAlign()); 692 693 // Walk through any array types while we're at it. 694 T = getBaseElementType(arrayType); 695 } 696 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 697 } 698 699 // Fields can be subject to extra alignment constraints, like if 700 // the field is packed, the struct is packed, or the struct has a 701 // a max-field-alignment constraint (#pragma pack). So calculate 702 // the actual alignment of the field within the struct, and then 703 // (as we're expected to) constrain that by the alignment of the type. 704 if (const FieldDecl *field = dyn_cast<FieldDecl>(VD)) { 705 // So calculate the alignment of the field. 706 const ASTRecordLayout &layout = getASTRecordLayout(field->getParent()); 707 708 // Start with the record's overall alignment. 709 unsigned fieldAlign = toBits(layout.getAlignment()); 710 711 // Use the GCD of that and the offset within the record. 712 uint64_t offset = layout.getFieldOffset(field->getFieldIndex()); 713 if (offset > 0) { 714 // Alignment is always a power of 2, so the GCD will be a power of 2, 715 // which means we get to do this crazy thing instead of Euclid's. 716 uint64_t lowBitOfOffset = offset & (~offset + 1); 717 if (lowBitOfOffset < fieldAlign) 718 fieldAlign = static_cast<unsigned>(lowBitOfOffset); 719 } 720 721 Align = std::min(Align, fieldAlign); 722 } 723 } 724 725 return toCharUnitsFromBits(Align); 726} 727 728std::pair<CharUnits, CharUnits> 729ASTContext::getTypeInfoInChars(const Type *T) const { 730 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 731 return std::make_pair(toCharUnitsFromBits(Info.first), 732 toCharUnitsFromBits(Info.second)); 733} 734 735std::pair<CharUnits, CharUnits> 736ASTContext::getTypeInfoInChars(QualType T) const { 737 return getTypeInfoInChars(T.getTypePtr()); 738} 739 740/// getTypeSize - Return the size of the specified type, in bits. This method 741/// does not work on incomplete types. 742/// 743/// FIXME: Pointers into different addr spaces could have different sizes and 744/// alignment requirements: getPointerInfo should take an AddrSpace, this 745/// should take a QualType, &c. 746std::pair<uint64_t, unsigned> 747ASTContext::getTypeInfo(const Type *T) const { 748 uint64_t Width=0; 749 unsigned Align=8; 750 switch (T->getTypeClass()) { 751#define TYPE(Class, Base) 752#define ABSTRACT_TYPE(Class, Base) 753#define NON_CANONICAL_TYPE(Class, Base) 754#define DEPENDENT_TYPE(Class, Base) case Type::Class: 755#include "clang/AST/TypeNodes.def" 756 assert(false && "Should not see dependent types"); 757 break; 758 759 case Type::FunctionNoProto: 760 case Type::FunctionProto: 761 // GCC extension: alignof(function) = 32 bits 762 Width = 0; 763 Align = 32; 764 break; 765 766 case Type::IncompleteArray: 767 case Type::VariableArray: 768 Width = 0; 769 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 770 break; 771 772 case Type::ConstantArray: { 773 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 774 775 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 776 Width = EltInfo.first*CAT->getSize().getZExtValue(); 777 Align = EltInfo.second; 778 Width = llvm::RoundUpToAlignment(Width, Align); 779 break; 780 } 781 case Type::ExtVector: 782 case Type::Vector: { 783 const VectorType *VT = cast<VectorType>(T); 784 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 785 Width = EltInfo.first*VT->getNumElements(); 786 Align = Width; 787 // If the alignment is not a power of 2, round up to the next power of 2. 788 // This happens for non-power-of-2 length vectors. 789 if (Align & (Align-1)) { 790 Align = llvm::NextPowerOf2(Align); 791 Width = llvm::RoundUpToAlignment(Width, Align); 792 } 793 break; 794 } 795 796 case Type::Builtin: 797 switch (cast<BuiltinType>(T)->getKind()) { 798 default: assert(0 && "Unknown builtin type!"); 799 case BuiltinType::Void: 800 // GCC extension: alignof(void) = 8 bits. 801 Width = 0; 802 Align = 8; 803 break; 804 805 case BuiltinType::Bool: 806 Width = Target.getBoolWidth(); 807 Align = Target.getBoolAlign(); 808 break; 809 case BuiltinType::Char_S: 810 case BuiltinType::Char_U: 811 case BuiltinType::UChar: 812 case BuiltinType::SChar: 813 Width = Target.getCharWidth(); 814 Align = Target.getCharAlign(); 815 break; 816 case BuiltinType::WChar_S: 817 case BuiltinType::WChar_U: 818 Width = Target.getWCharWidth(); 819 Align = Target.getWCharAlign(); 820 break; 821 case BuiltinType::Char16: 822 Width = Target.getChar16Width(); 823 Align = Target.getChar16Align(); 824 break; 825 case BuiltinType::Char32: 826 Width = Target.getChar32Width(); 827 Align = Target.getChar32Align(); 828 break; 829 case BuiltinType::UShort: 830 case BuiltinType::Short: 831 Width = Target.getShortWidth(); 832 Align = Target.getShortAlign(); 833 break; 834 case BuiltinType::UInt: 835 case BuiltinType::Int: 836 Width = Target.getIntWidth(); 837 Align = Target.getIntAlign(); 838 break; 839 case BuiltinType::ULong: 840 case BuiltinType::Long: 841 Width = Target.getLongWidth(); 842 Align = Target.getLongAlign(); 843 break; 844 case BuiltinType::ULongLong: 845 case BuiltinType::LongLong: 846 Width = Target.getLongLongWidth(); 847 Align = Target.getLongLongAlign(); 848 break; 849 case BuiltinType::Int128: 850 case BuiltinType::UInt128: 851 Width = 128; 852 Align = 128; // int128_t is 128-bit aligned on all targets. 853 break; 854 case BuiltinType::Float: 855 Width = Target.getFloatWidth(); 856 Align = Target.getFloatAlign(); 857 break; 858 case BuiltinType::Double: 859 Width = Target.getDoubleWidth(); 860 Align = Target.getDoubleAlign(); 861 break; 862 case BuiltinType::LongDouble: 863 Width = Target.getLongDoubleWidth(); 864 Align = Target.getLongDoubleAlign(); 865 break; 866 case BuiltinType::NullPtr: 867 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 868 Align = Target.getPointerAlign(0); // == sizeof(void*) 869 break; 870 case BuiltinType::ObjCId: 871 case BuiltinType::ObjCClass: 872 case BuiltinType::ObjCSel: 873 Width = Target.getPointerWidth(0); 874 Align = Target.getPointerAlign(0); 875 break; 876 } 877 break; 878 case Type::ObjCObjectPointer: 879 Width = Target.getPointerWidth(0); 880 Align = Target.getPointerAlign(0); 881 break; 882 case Type::BlockPointer: { 883 unsigned AS = getTargetAddressSpace( 884 cast<BlockPointerType>(T)->getPointeeType()); 885 Width = Target.getPointerWidth(AS); 886 Align = Target.getPointerAlign(AS); 887 break; 888 } 889 case Type::LValueReference: 890 case Type::RValueReference: { 891 // alignof and sizeof should never enter this code path here, so we go 892 // the pointer route. 893 unsigned AS = getTargetAddressSpace( 894 cast<ReferenceType>(T)->getPointeeType()); 895 Width = Target.getPointerWidth(AS); 896 Align = Target.getPointerAlign(AS); 897 break; 898 } 899 case Type::Pointer: { 900 unsigned AS = getTargetAddressSpace(cast<PointerType>(T)->getPointeeType()); 901 Width = Target.getPointerWidth(AS); 902 Align = Target.getPointerAlign(AS); 903 break; 904 } 905 case Type::MemberPointer: { 906 const MemberPointerType *MPT = cast<MemberPointerType>(T); 907 std::pair<uint64_t, unsigned> PtrDiffInfo = 908 getTypeInfo(getPointerDiffType()); 909 Width = PtrDiffInfo.first * ABI->getMemberPointerSize(MPT); 910 Align = PtrDiffInfo.second; 911 break; 912 } 913 case Type::Complex: { 914 // Complex types have the same alignment as their elements, but twice the 915 // size. 916 std::pair<uint64_t, unsigned> EltInfo = 917 getTypeInfo(cast<ComplexType>(T)->getElementType()); 918 Width = EltInfo.first*2; 919 Align = EltInfo.second; 920 break; 921 } 922 case Type::ObjCObject: 923 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 924 case Type::ObjCInterface: { 925 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 926 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 927 Width = toBits(Layout.getSize()); 928 Align = toBits(Layout.getAlignment()); 929 break; 930 } 931 case Type::Record: 932 case Type::Enum: { 933 const TagType *TT = cast<TagType>(T); 934 935 if (TT->getDecl()->isInvalidDecl()) { 936 Width = 8; 937 Align = 8; 938 break; 939 } 940 941 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 942 return getTypeInfo(ET->getDecl()->getIntegerType()); 943 944 const RecordType *RT = cast<RecordType>(TT); 945 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 946 Width = toBits(Layout.getSize()); 947 Align = toBits(Layout.getAlignment()); 948 break; 949 } 950 951 case Type::SubstTemplateTypeParm: 952 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 953 getReplacementType().getTypePtr()); 954 955 case Type::Auto: { 956 const AutoType *A = cast<AutoType>(T); 957 assert(A->isDeduced() && "Cannot request the size of a dependent type"); 958 return getTypeInfo(A->getDeducedType().getTypePtr()); 959 } 960 961 case Type::Paren: 962 return getTypeInfo(cast<ParenType>(T)->getInnerType().getTypePtr()); 963 964 case Type::Typedef: { 965 const TypedefNameDecl *Typedef = cast<TypedefType>(T)->getDecl(); 966 std::pair<uint64_t, unsigned> Info 967 = getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 968 // If the typedef has an aligned attribute on it, it overrides any computed 969 // alignment we have. This violates the GCC documentation (which says that 970 // attribute(aligned) can only round up) but matches its implementation. 971 if (unsigned AttrAlign = Typedef->getMaxAlignment()) 972 Align = AttrAlign; 973 else 974 Align = Info.second; 975 Width = Info.first; 976 break; 977 } 978 979 case Type::TypeOfExpr: 980 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 981 .getTypePtr()); 982 983 case Type::TypeOf: 984 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 985 986 case Type::Decltype: 987 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 988 .getTypePtr()); 989 990 case Type::UnaryTransform: 991 return getTypeInfo(cast<UnaryTransformType>(T)->getUnderlyingType()); 992 993 case Type::Elaborated: 994 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 995 996 case Type::Attributed: 997 return getTypeInfo( 998 cast<AttributedType>(T)->getEquivalentType().getTypePtr()); 999 1000 case Type::TemplateSpecialization: { 1001 assert(getCanonicalType(T) != T && 1002 "Cannot request the size of a dependent type"); 1003 const TemplateSpecializationType *TST = cast<TemplateSpecializationType>(T); 1004 // A type alias template specialization may refer to a typedef with the 1005 // aligned attribute on it. 1006 if (TST->isTypeAlias()) 1007 return getTypeInfo(TST->getAliasedType().getTypePtr()); 1008 else 1009 return getTypeInfo(getCanonicalType(T)); 1010 } 1011 1012 } 1013 1014 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 1015 return std::make_pair(Width, Align); 1016} 1017 1018/// toCharUnitsFromBits - Convert a size in bits to a size in characters. 1019CharUnits ASTContext::toCharUnitsFromBits(int64_t BitSize) const { 1020 return CharUnits::fromQuantity(BitSize / getCharWidth()); 1021} 1022 1023/// toBits - Convert a size in characters to a size in characters. 1024int64_t ASTContext::toBits(CharUnits CharSize) const { 1025 return CharSize.getQuantity() * getCharWidth(); 1026} 1027 1028/// getTypeSizeInChars - Return the size of the specified type, in characters. 1029/// This method does not work on incomplete types. 1030CharUnits ASTContext::getTypeSizeInChars(QualType T) const { 1031 return toCharUnitsFromBits(getTypeSize(T)); 1032} 1033CharUnits ASTContext::getTypeSizeInChars(const Type *T) const { 1034 return toCharUnitsFromBits(getTypeSize(T)); 1035} 1036 1037/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 1038/// characters. This method does not work on incomplete types. 1039CharUnits ASTContext::getTypeAlignInChars(QualType T) const { 1040 return toCharUnitsFromBits(getTypeAlign(T)); 1041} 1042CharUnits ASTContext::getTypeAlignInChars(const Type *T) const { 1043 return toCharUnitsFromBits(getTypeAlign(T)); 1044} 1045 1046/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 1047/// type for the current target in bits. This can be different than the ABI 1048/// alignment in cases where it is beneficial for performance to overalign 1049/// a data type. 1050unsigned ASTContext::getPreferredTypeAlign(const Type *T) const { 1051 unsigned ABIAlign = getTypeAlign(T); 1052 1053 // Double and long long should be naturally aligned if possible. 1054 if (const ComplexType* CT = T->getAs<ComplexType>()) 1055 T = CT->getElementType().getTypePtr(); 1056 if (T->isSpecificBuiltinType(BuiltinType::Double) || 1057 T->isSpecificBuiltinType(BuiltinType::LongLong)) 1058 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 1059 1060 return ABIAlign; 1061} 1062 1063/// ShallowCollectObjCIvars - 1064/// Collect all ivars, including those synthesized, in the current class. 1065/// 1066void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 1067 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) const { 1068 // FIXME. This need be removed but there are two many places which 1069 // assume const-ness of ObjCInterfaceDecl 1070 ObjCInterfaceDecl *IDecl = const_cast<ObjCInterfaceDecl *>(OI); 1071 for (ObjCIvarDecl *Iv = IDecl->all_declared_ivar_begin(); Iv; 1072 Iv= Iv->getNextIvar()) 1073 Ivars.push_back(Iv); 1074} 1075 1076/// DeepCollectObjCIvars - 1077/// This routine first collects all declared, but not synthesized, ivars in 1078/// super class and then collects all ivars, including those synthesized for 1079/// current class. This routine is used for implementation of current class 1080/// when all ivars, declared and synthesized are known. 1081/// 1082void ASTContext::DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, 1083 bool leafClass, 1084 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) const { 1085 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 1086 DeepCollectObjCIvars(SuperClass, false, Ivars); 1087 if (!leafClass) { 1088 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 1089 E = OI->ivar_end(); I != E; ++I) 1090 Ivars.push_back(*I); 1091 } 1092 else 1093 ShallowCollectObjCIvars(OI, Ivars); 1094} 1095 1096/// CollectInheritedProtocols - Collect all protocols in current class and 1097/// those inherited by it. 1098void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 1099 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 1100 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 1101 // We can use protocol_iterator here instead of 1102 // all_referenced_protocol_iterator since we are walking all categories. 1103 for (ObjCInterfaceDecl::all_protocol_iterator P = OI->all_referenced_protocol_begin(), 1104 PE = OI->all_referenced_protocol_end(); P != PE; ++P) { 1105 ObjCProtocolDecl *Proto = (*P); 1106 Protocols.insert(Proto); 1107 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1108 PE = Proto->protocol_end(); P != PE; ++P) { 1109 Protocols.insert(*P); 1110 CollectInheritedProtocols(*P, Protocols); 1111 } 1112 } 1113 1114 // Categories of this Interface. 1115 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 1116 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 1117 CollectInheritedProtocols(CDeclChain, Protocols); 1118 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 1119 while (SD) { 1120 CollectInheritedProtocols(SD, Protocols); 1121 SD = SD->getSuperClass(); 1122 } 1123 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 1124 for (ObjCCategoryDecl::protocol_iterator P = OC->protocol_begin(), 1125 PE = OC->protocol_end(); P != PE; ++P) { 1126 ObjCProtocolDecl *Proto = (*P); 1127 Protocols.insert(Proto); 1128 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1129 PE = Proto->protocol_end(); P != PE; ++P) 1130 CollectInheritedProtocols(*P, Protocols); 1131 } 1132 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 1133 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 1134 PE = OP->protocol_end(); P != PE; ++P) { 1135 ObjCProtocolDecl *Proto = (*P); 1136 Protocols.insert(Proto); 1137 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1138 PE = Proto->protocol_end(); P != PE; ++P) 1139 CollectInheritedProtocols(*P, Protocols); 1140 } 1141 } 1142} 1143 1144unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) const { 1145 unsigned count = 0; 1146 // Count ivars declared in class extension. 1147 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl; 1148 CDecl = CDecl->getNextClassExtension()) 1149 count += CDecl->ivar_size(); 1150 1151 // Count ivar defined in this class's implementation. This 1152 // includes synthesized ivars. 1153 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 1154 count += ImplDecl->ivar_size(); 1155 1156 return count; 1157} 1158 1159/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1160ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 1161 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1162 I = ObjCImpls.find(D); 1163 if (I != ObjCImpls.end()) 1164 return cast<ObjCImplementationDecl>(I->second); 1165 return 0; 1166} 1167/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1168ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 1169 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1170 I = ObjCImpls.find(D); 1171 if (I != ObjCImpls.end()) 1172 return cast<ObjCCategoryImplDecl>(I->second); 1173 return 0; 1174} 1175 1176/// \brief Set the implementation of ObjCInterfaceDecl. 1177void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1178 ObjCImplementationDecl *ImplD) { 1179 assert(IFaceD && ImplD && "Passed null params"); 1180 ObjCImpls[IFaceD] = ImplD; 1181} 1182/// \brief Set the implementation of ObjCCategoryDecl. 1183void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 1184 ObjCCategoryImplDecl *ImplD) { 1185 assert(CatD && ImplD && "Passed null params"); 1186 ObjCImpls[CatD] = ImplD; 1187} 1188 1189/// \brief Get the copy initialization expression of VarDecl,or NULL if 1190/// none exists. 1191Expr *ASTContext::getBlockVarCopyInits(const VarDecl*VD) { 1192 assert(VD && "Passed null params"); 1193 assert(VD->hasAttr<BlocksAttr>() && 1194 "getBlockVarCopyInits - not __block var"); 1195 llvm::DenseMap<const VarDecl*, Expr*>::iterator 1196 I = BlockVarCopyInits.find(VD); 1197 return (I != BlockVarCopyInits.end()) ? cast<Expr>(I->second) : 0; 1198} 1199 1200/// \brief Set the copy inialization expression of a block var decl. 1201void ASTContext::setBlockVarCopyInits(VarDecl*VD, Expr* Init) { 1202 assert(VD && Init && "Passed null params"); 1203 assert(VD->hasAttr<BlocksAttr>() && 1204 "setBlockVarCopyInits - not __block var"); 1205 BlockVarCopyInits[VD] = Init; 1206} 1207 1208/// \brief Allocate an uninitialized TypeSourceInfo. 1209/// 1210/// The caller should initialize the memory held by TypeSourceInfo using 1211/// the TypeLoc wrappers. 1212/// 1213/// \param T the type that will be the basis for type source info. This type 1214/// should refer to how the declarator was written in source code, not to 1215/// what type semantic analysis resolved the declarator to. 1216TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 1217 unsigned DataSize) const { 1218 if (!DataSize) 1219 DataSize = TypeLoc::getFullDataSizeForType(T); 1220 else 1221 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 1222 "incorrect data size provided to CreateTypeSourceInfo!"); 1223 1224 TypeSourceInfo *TInfo = 1225 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 1226 new (TInfo) TypeSourceInfo(T); 1227 return TInfo; 1228} 1229 1230TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1231 SourceLocation L) const { 1232 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1233 DI->getTypeLoc().initialize(const_cast<ASTContext &>(*this), L); 1234 return DI; 1235} 1236 1237const ASTRecordLayout & 1238ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) const { 1239 return getObjCLayout(D, 0); 1240} 1241 1242const ASTRecordLayout & 1243ASTContext::getASTObjCImplementationLayout( 1244 const ObjCImplementationDecl *D) const { 1245 return getObjCLayout(D->getClassInterface(), D); 1246} 1247 1248//===----------------------------------------------------------------------===// 1249// Type creation/memoization methods 1250//===----------------------------------------------------------------------===// 1251 1252QualType 1253ASTContext::getExtQualType(const Type *baseType, Qualifiers quals) const { 1254 unsigned fastQuals = quals.getFastQualifiers(); 1255 quals.removeFastQualifiers(); 1256 1257 // Check if we've already instantiated this type. 1258 llvm::FoldingSetNodeID ID; 1259 ExtQuals::Profile(ID, baseType, quals); 1260 void *insertPos = 0; 1261 if (ExtQuals *eq = ExtQualNodes.FindNodeOrInsertPos(ID, insertPos)) { 1262 assert(eq->getQualifiers() == quals); 1263 return QualType(eq, fastQuals); 1264 } 1265 1266 // If the base type is not canonical, make the appropriate canonical type. 1267 QualType canon; 1268 if (!baseType->isCanonicalUnqualified()) { 1269 SplitQualType canonSplit = baseType->getCanonicalTypeInternal().split(); 1270 canonSplit.second.addConsistentQualifiers(quals); 1271 canon = getExtQualType(canonSplit.first, canonSplit.second); 1272 1273 // Re-find the insert position. 1274 (void) ExtQualNodes.FindNodeOrInsertPos(ID, insertPos); 1275 } 1276 1277 ExtQuals *eq = new (*this, TypeAlignment) ExtQuals(baseType, canon, quals); 1278 ExtQualNodes.InsertNode(eq, insertPos); 1279 return QualType(eq, fastQuals); 1280} 1281 1282QualType 1283ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) const { 1284 QualType CanT = getCanonicalType(T); 1285 if (CanT.getAddressSpace() == AddressSpace) 1286 return T; 1287 1288 // If we are composing extended qualifiers together, merge together 1289 // into one ExtQuals node. 1290 QualifierCollector Quals; 1291 const Type *TypeNode = Quals.strip(T); 1292 1293 // If this type already has an address space specified, it cannot get 1294 // another one. 1295 assert(!Quals.hasAddressSpace() && 1296 "Type cannot be in multiple addr spaces!"); 1297 Quals.addAddressSpace(AddressSpace); 1298 1299 return getExtQualType(TypeNode, Quals); 1300} 1301 1302QualType ASTContext::getObjCGCQualType(QualType T, 1303 Qualifiers::GC GCAttr) const { 1304 QualType CanT = getCanonicalType(T); 1305 if (CanT.getObjCGCAttr() == GCAttr) 1306 return T; 1307 1308 if (const PointerType *ptr = T->getAs<PointerType>()) { 1309 QualType Pointee = ptr->getPointeeType(); 1310 if (Pointee->isAnyPointerType()) { 1311 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1312 return getPointerType(ResultType); 1313 } 1314 } 1315 1316 // If we are composing extended qualifiers together, merge together 1317 // into one ExtQuals node. 1318 QualifierCollector Quals; 1319 const Type *TypeNode = Quals.strip(T); 1320 1321 // If this type already has an ObjCGC specified, it cannot get 1322 // another one. 1323 assert(!Quals.hasObjCGCAttr() && 1324 "Type cannot have multiple ObjCGCs!"); 1325 Quals.addObjCGCAttr(GCAttr); 1326 1327 return getExtQualType(TypeNode, Quals); 1328} 1329 1330const FunctionType *ASTContext::adjustFunctionType(const FunctionType *T, 1331 FunctionType::ExtInfo Info) { 1332 if (T->getExtInfo() == Info) 1333 return T; 1334 1335 QualType Result; 1336 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(T)) { 1337 Result = getFunctionNoProtoType(FNPT->getResultType(), Info); 1338 } else { 1339 const FunctionProtoType *FPT = cast<FunctionProtoType>(T); 1340 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 1341 EPI.ExtInfo = Info; 1342 Result = getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1343 FPT->getNumArgs(), EPI); 1344 } 1345 1346 return cast<FunctionType>(Result.getTypePtr()); 1347} 1348 1349/// getComplexType - Return the uniqued reference to the type for a complex 1350/// number with the specified element type. 1351QualType ASTContext::getComplexType(QualType T) const { 1352 // Unique pointers, to guarantee there is only one pointer of a particular 1353 // structure. 1354 llvm::FoldingSetNodeID ID; 1355 ComplexType::Profile(ID, T); 1356 1357 void *InsertPos = 0; 1358 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1359 return QualType(CT, 0); 1360 1361 // If the pointee type isn't canonical, this won't be a canonical type either, 1362 // so fill in the canonical type field. 1363 QualType Canonical; 1364 if (!T.isCanonical()) { 1365 Canonical = getComplexType(getCanonicalType(T)); 1366 1367 // Get the new insert position for the node we care about. 1368 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1369 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1370 } 1371 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1372 Types.push_back(New); 1373 ComplexTypes.InsertNode(New, InsertPos); 1374 return QualType(New, 0); 1375} 1376 1377/// getPointerType - Return the uniqued reference to the type for a pointer to 1378/// the specified type. 1379QualType ASTContext::getPointerType(QualType T) const { 1380 // Unique pointers, to guarantee there is only one pointer of a particular 1381 // structure. 1382 llvm::FoldingSetNodeID ID; 1383 PointerType::Profile(ID, T); 1384 1385 void *InsertPos = 0; 1386 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1387 return QualType(PT, 0); 1388 1389 // If the pointee type isn't canonical, this won't be a canonical type either, 1390 // so fill in the canonical type field. 1391 QualType Canonical; 1392 if (!T.isCanonical()) { 1393 Canonical = getPointerType(getCanonicalType(T)); 1394 1395 // Get the new insert position for the node we care about. 1396 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1397 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1398 } 1399 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1400 Types.push_back(New); 1401 PointerTypes.InsertNode(New, InsertPos); 1402 return QualType(New, 0); 1403} 1404 1405/// getBlockPointerType - Return the uniqued reference to the type for 1406/// a pointer to the specified block. 1407QualType ASTContext::getBlockPointerType(QualType T) const { 1408 assert(T->isFunctionType() && "block of function types only"); 1409 // Unique pointers, to guarantee there is only one block of a particular 1410 // structure. 1411 llvm::FoldingSetNodeID ID; 1412 BlockPointerType::Profile(ID, T); 1413 1414 void *InsertPos = 0; 1415 if (BlockPointerType *PT = 1416 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1417 return QualType(PT, 0); 1418 1419 // If the block pointee type isn't canonical, this won't be a canonical 1420 // type either so fill in the canonical type field. 1421 QualType Canonical; 1422 if (!T.isCanonical()) { 1423 Canonical = getBlockPointerType(getCanonicalType(T)); 1424 1425 // Get the new insert position for the node we care about. 1426 BlockPointerType *NewIP = 1427 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1428 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1429 } 1430 BlockPointerType *New 1431 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1432 Types.push_back(New); 1433 BlockPointerTypes.InsertNode(New, InsertPos); 1434 return QualType(New, 0); 1435} 1436 1437/// getLValueReferenceType - Return the uniqued reference to the type for an 1438/// lvalue reference to the specified type. 1439QualType 1440ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) const { 1441 assert(getCanonicalType(T) != OverloadTy && 1442 "Unresolved overloaded function type"); 1443 1444 // Unique pointers, to guarantee there is only one pointer of a particular 1445 // structure. 1446 llvm::FoldingSetNodeID ID; 1447 ReferenceType::Profile(ID, T, SpelledAsLValue); 1448 1449 void *InsertPos = 0; 1450 if (LValueReferenceType *RT = 1451 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1452 return QualType(RT, 0); 1453 1454 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1455 1456 // If the referencee type isn't canonical, this won't be a canonical type 1457 // either, so fill in the canonical type field. 1458 QualType Canonical; 1459 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1460 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1461 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1462 1463 // Get the new insert position for the node we care about. 1464 LValueReferenceType *NewIP = 1465 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1466 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1467 } 1468 1469 LValueReferenceType *New 1470 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1471 SpelledAsLValue); 1472 Types.push_back(New); 1473 LValueReferenceTypes.InsertNode(New, InsertPos); 1474 1475 return QualType(New, 0); 1476} 1477 1478/// getRValueReferenceType - Return the uniqued reference to the type for an 1479/// rvalue reference to the specified type. 1480QualType ASTContext::getRValueReferenceType(QualType T) const { 1481 // Unique pointers, to guarantee there is only one pointer of a particular 1482 // structure. 1483 llvm::FoldingSetNodeID ID; 1484 ReferenceType::Profile(ID, T, false); 1485 1486 void *InsertPos = 0; 1487 if (RValueReferenceType *RT = 1488 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1489 return QualType(RT, 0); 1490 1491 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1492 1493 // If the referencee type isn't canonical, this won't be a canonical type 1494 // either, so fill in the canonical type field. 1495 QualType Canonical; 1496 if (InnerRef || !T.isCanonical()) { 1497 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1498 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1499 1500 // Get the new insert position for the node we care about. 1501 RValueReferenceType *NewIP = 1502 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1503 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1504 } 1505 1506 RValueReferenceType *New 1507 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1508 Types.push_back(New); 1509 RValueReferenceTypes.InsertNode(New, InsertPos); 1510 return QualType(New, 0); 1511} 1512 1513/// getMemberPointerType - Return the uniqued reference to the type for a 1514/// member pointer to the specified type, in the specified class. 1515QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) const { 1516 // Unique pointers, to guarantee there is only one pointer of a particular 1517 // structure. 1518 llvm::FoldingSetNodeID ID; 1519 MemberPointerType::Profile(ID, T, Cls); 1520 1521 void *InsertPos = 0; 1522 if (MemberPointerType *PT = 1523 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1524 return QualType(PT, 0); 1525 1526 // If the pointee or class type isn't canonical, this won't be a canonical 1527 // type either, so fill in the canonical type field. 1528 QualType Canonical; 1529 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1530 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1531 1532 // Get the new insert position for the node we care about. 1533 MemberPointerType *NewIP = 1534 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1535 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1536 } 1537 MemberPointerType *New 1538 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1539 Types.push_back(New); 1540 MemberPointerTypes.InsertNode(New, InsertPos); 1541 return QualType(New, 0); 1542} 1543 1544/// getConstantArrayType - Return the unique reference to the type for an 1545/// array of the specified element type. 1546QualType ASTContext::getConstantArrayType(QualType EltTy, 1547 const llvm::APInt &ArySizeIn, 1548 ArrayType::ArraySizeModifier ASM, 1549 unsigned IndexTypeQuals) const { 1550 assert((EltTy->isDependentType() || 1551 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1552 "Constant array of VLAs is illegal!"); 1553 1554 // Convert the array size into a canonical width matching the pointer size for 1555 // the target. 1556 llvm::APInt ArySize(ArySizeIn); 1557 ArySize = 1558 ArySize.zextOrTrunc(Target.getPointerWidth(getTargetAddressSpace(EltTy))); 1559 1560 llvm::FoldingSetNodeID ID; 1561 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, IndexTypeQuals); 1562 1563 void *InsertPos = 0; 1564 if (ConstantArrayType *ATP = 1565 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1566 return QualType(ATP, 0); 1567 1568 // If the element type isn't canonical or has qualifiers, this won't 1569 // be a canonical type either, so fill in the canonical type field. 1570 QualType Canon; 1571 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1572 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1573 Canon = getConstantArrayType(QualType(canonSplit.first, 0), ArySize, 1574 ASM, IndexTypeQuals); 1575 Canon = getQualifiedType(Canon, canonSplit.second); 1576 1577 // Get the new insert position for the node we care about. 1578 ConstantArrayType *NewIP = 1579 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1580 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1581 } 1582 1583 ConstantArrayType *New = new(*this,TypeAlignment) 1584 ConstantArrayType(EltTy, Canon, ArySize, ASM, IndexTypeQuals); 1585 ConstantArrayTypes.InsertNode(New, InsertPos); 1586 Types.push_back(New); 1587 return QualType(New, 0); 1588} 1589 1590/// getVariableArrayDecayedType - Turns the given type, which may be 1591/// variably-modified, into the corresponding type with all the known 1592/// sizes replaced with [*]. 1593QualType ASTContext::getVariableArrayDecayedType(QualType type) const { 1594 // Vastly most common case. 1595 if (!type->isVariablyModifiedType()) return type; 1596 1597 QualType result; 1598 1599 SplitQualType split = type.getSplitDesugaredType(); 1600 const Type *ty = split.first; 1601 switch (ty->getTypeClass()) { 1602#define TYPE(Class, Base) 1603#define ABSTRACT_TYPE(Class, Base) 1604#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 1605#include "clang/AST/TypeNodes.def" 1606 llvm_unreachable("didn't desugar past all non-canonical types?"); 1607 1608 // These types should never be variably-modified. 1609 case Type::Builtin: 1610 case Type::Complex: 1611 case Type::Vector: 1612 case Type::ExtVector: 1613 case Type::DependentSizedExtVector: 1614 case Type::ObjCObject: 1615 case Type::ObjCInterface: 1616 case Type::ObjCObjectPointer: 1617 case Type::Record: 1618 case Type::Enum: 1619 case Type::UnresolvedUsing: 1620 case Type::TypeOfExpr: 1621 case Type::TypeOf: 1622 case Type::Decltype: 1623 case Type::UnaryTransform: 1624 case Type::DependentName: 1625 case Type::InjectedClassName: 1626 case Type::TemplateSpecialization: 1627 case Type::DependentTemplateSpecialization: 1628 case Type::TemplateTypeParm: 1629 case Type::SubstTemplateTypeParmPack: 1630 case Type::Auto: 1631 case Type::PackExpansion: 1632 llvm_unreachable("type should never be variably-modified"); 1633 1634 // These types can be variably-modified but should never need to 1635 // further decay. 1636 case Type::FunctionNoProto: 1637 case Type::FunctionProto: 1638 case Type::BlockPointer: 1639 case Type::MemberPointer: 1640 return type; 1641 1642 // These types can be variably-modified. All these modifications 1643 // preserve structure except as noted by comments. 1644 // TODO: if we ever care about optimizing VLAs, there are no-op 1645 // optimizations available here. 1646 case Type::Pointer: 1647 result = getPointerType(getVariableArrayDecayedType( 1648 cast<PointerType>(ty)->getPointeeType())); 1649 break; 1650 1651 case Type::LValueReference: { 1652 const LValueReferenceType *lv = cast<LValueReferenceType>(ty); 1653 result = getLValueReferenceType( 1654 getVariableArrayDecayedType(lv->getPointeeType()), 1655 lv->isSpelledAsLValue()); 1656 break; 1657 } 1658 1659 case Type::RValueReference: { 1660 const RValueReferenceType *lv = cast<RValueReferenceType>(ty); 1661 result = getRValueReferenceType( 1662 getVariableArrayDecayedType(lv->getPointeeType())); 1663 break; 1664 } 1665 1666 case Type::ConstantArray: { 1667 const ConstantArrayType *cat = cast<ConstantArrayType>(ty); 1668 result = getConstantArrayType( 1669 getVariableArrayDecayedType(cat->getElementType()), 1670 cat->getSize(), 1671 cat->getSizeModifier(), 1672 cat->getIndexTypeCVRQualifiers()); 1673 break; 1674 } 1675 1676 case Type::DependentSizedArray: { 1677 const DependentSizedArrayType *dat = cast<DependentSizedArrayType>(ty); 1678 result = getDependentSizedArrayType( 1679 getVariableArrayDecayedType(dat->getElementType()), 1680 dat->getSizeExpr(), 1681 dat->getSizeModifier(), 1682 dat->getIndexTypeCVRQualifiers(), 1683 dat->getBracketsRange()); 1684 break; 1685 } 1686 1687 // Turn incomplete types into [*] types. 1688 case Type::IncompleteArray: { 1689 const IncompleteArrayType *iat = cast<IncompleteArrayType>(ty); 1690 result = getVariableArrayType( 1691 getVariableArrayDecayedType(iat->getElementType()), 1692 /*size*/ 0, 1693 ArrayType::Normal, 1694 iat->getIndexTypeCVRQualifiers(), 1695 SourceRange()); 1696 break; 1697 } 1698 1699 // Turn VLA types into [*] types. 1700 case Type::VariableArray: { 1701 const VariableArrayType *vat = cast<VariableArrayType>(ty); 1702 result = getVariableArrayType( 1703 getVariableArrayDecayedType(vat->getElementType()), 1704 /*size*/ 0, 1705 ArrayType::Star, 1706 vat->getIndexTypeCVRQualifiers(), 1707 vat->getBracketsRange()); 1708 break; 1709 } 1710 } 1711 1712 // Apply the top-level qualifiers from the original. 1713 return getQualifiedType(result, split.second); 1714} 1715 1716/// getVariableArrayType - Returns a non-unique reference to the type for a 1717/// variable array of the specified element type. 1718QualType ASTContext::getVariableArrayType(QualType EltTy, 1719 Expr *NumElts, 1720 ArrayType::ArraySizeModifier ASM, 1721 unsigned IndexTypeQuals, 1722 SourceRange Brackets) const { 1723 // Since we don't unique expressions, it isn't possible to unique VLA's 1724 // that have an expression provided for their size. 1725 QualType Canon; 1726 1727 // Be sure to pull qualifiers off the element type. 1728 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1729 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1730 Canon = getVariableArrayType(QualType(canonSplit.first, 0), NumElts, ASM, 1731 IndexTypeQuals, Brackets); 1732 Canon = getQualifiedType(Canon, canonSplit.second); 1733 } 1734 1735 VariableArrayType *New = new(*this, TypeAlignment) 1736 VariableArrayType(EltTy, Canon, NumElts, ASM, IndexTypeQuals, Brackets); 1737 1738 VariableArrayTypes.push_back(New); 1739 Types.push_back(New); 1740 return QualType(New, 0); 1741} 1742 1743/// getDependentSizedArrayType - Returns a non-unique reference to 1744/// the type for a dependently-sized array of the specified element 1745/// type. 1746QualType ASTContext::getDependentSizedArrayType(QualType elementType, 1747 Expr *numElements, 1748 ArrayType::ArraySizeModifier ASM, 1749 unsigned elementTypeQuals, 1750 SourceRange brackets) const { 1751 assert((!numElements || numElements->isTypeDependent() || 1752 numElements->isValueDependent()) && 1753 "Size must be type- or value-dependent!"); 1754 1755 // Dependently-sized array types that do not have a specified number 1756 // of elements will have their sizes deduced from a dependent 1757 // initializer. We do no canonicalization here at all, which is okay 1758 // because they can't be used in most locations. 1759 if (!numElements) { 1760 DependentSizedArrayType *newType 1761 = new (*this, TypeAlignment) 1762 DependentSizedArrayType(*this, elementType, QualType(), 1763 numElements, ASM, elementTypeQuals, 1764 brackets); 1765 Types.push_back(newType); 1766 return QualType(newType, 0); 1767 } 1768 1769 // Otherwise, we actually build a new type every time, but we 1770 // also build a canonical type. 1771 1772 SplitQualType canonElementType = getCanonicalType(elementType).split(); 1773 1774 void *insertPos = 0; 1775 llvm::FoldingSetNodeID ID; 1776 DependentSizedArrayType::Profile(ID, *this, 1777 QualType(canonElementType.first, 0), 1778 ASM, elementTypeQuals, numElements); 1779 1780 // Look for an existing type with these properties. 1781 DependentSizedArrayType *canonTy = 1782 DependentSizedArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1783 1784 // If we don't have one, build one. 1785 if (!canonTy) { 1786 canonTy = new (*this, TypeAlignment) 1787 DependentSizedArrayType(*this, QualType(canonElementType.first, 0), 1788 QualType(), numElements, ASM, elementTypeQuals, 1789 brackets); 1790 DependentSizedArrayTypes.InsertNode(canonTy, insertPos); 1791 Types.push_back(canonTy); 1792 } 1793 1794 // Apply qualifiers from the element type to the array. 1795 QualType canon = getQualifiedType(QualType(canonTy,0), 1796 canonElementType.second); 1797 1798 // If we didn't need extra canonicalization for the element type, 1799 // then just use that as our result. 1800 if (QualType(canonElementType.first, 0) == elementType) 1801 return canon; 1802 1803 // Otherwise, we need to build a type which follows the spelling 1804 // of the element type. 1805 DependentSizedArrayType *sugaredType 1806 = new (*this, TypeAlignment) 1807 DependentSizedArrayType(*this, elementType, canon, numElements, 1808 ASM, elementTypeQuals, brackets); 1809 Types.push_back(sugaredType); 1810 return QualType(sugaredType, 0); 1811} 1812 1813QualType ASTContext::getIncompleteArrayType(QualType elementType, 1814 ArrayType::ArraySizeModifier ASM, 1815 unsigned elementTypeQuals) const { 1816 llvm::FoldingSetNodeID ID; 1817 IncompleteArrayType::Profile(ID, elementType, ASM, elementTypeQuals); 1818 1819 void *insertPos = 0; 1820 if (IncompleteArrayType *iat = 1821 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos)) 1822 return QualType(iat, 0); 1823 1824 // If the element type isn't canonical, this won't be a canonical type 1825 // either, so fill in the canonical type field. We also have to pull 1826 // qualifiers off the element type. 1827 QualType canon; 1828 1829 if (!elementType.isCanonical() || elementType.hasLocalQualifiers()) { 1830 SplitQualType canonSplit = getCanonicalType(elementType).split(); 1831 canon = getIncompleteArrayType(QualType(canonSplit.first, 0), 1832 ASM, elementTypeQuals); 1833 canon = getQualifiedType(canon, canonSplit.second); 1834 1835 // Get the new insert position for the node we care about. 1836 IncompleteArrayType *existing = 1837 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1838 assert(!existing && "Shouldn't be in the map!"); (void) existing; 1839 } 1840 1841 IncompleteArrayType *newType = new (*this, TypeAlignment) 1842 IncompleteArrayType(elementType, canon, ASM, elementTypeQuals); 1843 1844 IncompleteArrayTypes.InsertNode(newType, insertPos); 1845 Types.push_back(newType); 1846 return QualType(newType, 0); 1847} 1848 1849/// getVectorType - Return the unique reference to a vector type of 1850/// the specified element type and size. VectorType must be a built-in type. 1851QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1852 VectorType::VectorKind VecKind) const { 1853 assert(vecType->isBuiltinType()); 1854 1855 // Check if we've already instantiated a vector of this type. 1856 llvm::FoldingSetNodeID ID; 1857 VectorType::Profile(ID, vecType, NumElts, Type::Vector, VecKind); 1858 1859 void *InsertPos = 0; 1860 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1861 return QualType(VTP, 0); 1862 1863 // If the element type isn't canonical, this won't be a canonical type either, 1864 // so fill in the canonical type field. 1865 QualType Canonical; 1866 if (!vecType.isCanonical()) { 1867 Canonical = getVectorType(getCanonicalType(vecType), NumElts, VecKind); 1868 1869 // Get the new insert position for the node we care about. 1870 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1871 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1872 } 1873 VectorType *New = new (*this, TypeAlignment) 1874 VectorType(vecType, NumElts, Canonical, VecKind); 1875 VectorTypes.InsertNode(New, InsertPos); 1876 Types.push_back(New); 1877 return QualType(New, 0); 1878} 1879 1880/// getExtVectorType - Return the unique reference to an extended vector type of 1881/// the specified element type and size. VectorType must be a built-in type. 1882QualType 1883ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) const { 1884 assert(vecType->isBuiltinType()); 1885 1886 // Check if we've already instantiated a vector of this type. 1887 llvm::FoldingSetNodeID ID; 1888 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, 1889 VectorType::GenericVector); 1890 void *InsertPos = 0; 1891 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1892 return QualType(VTP, 0); 1893 1894 // If the element type isn't canonical, this won't be a canonical type either, 1895 // so fill in the canonical type field. 1896 QualType Canonical; 1897 if (!vecType.isCanonical()) { 1898 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1899 1900 // Get the new insert position for the node we care about. 1901 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1902 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1903 } 1904 ExtVectorType *New = new (*this, TypeAlignment) 1905 ExtVectorType(vecType, NumElts, Canonical); 1906 VectorTypes.InsertNode(New, InsertPos); 1907 Types.push_back(New); 1908 return QualType(New, 0); 1909} 1910 1911QualType 1912ASTContext::getDependentSizedExtVectorType(QualType vecType, 1913 Expr *SizeExpr, 1914 SourceLocation AttrLoc) const { 1915 llvm::FoldingSetNodeID ID; 1916 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1917 SizeExpr); 1918 1919 void *InsertPos = 0; 1920 DependentSizedExtVectorType *Canon 1921 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1922 DependentSizedExtVectorType *New; 1923 if (Canon) { 1924 // We already have a canonical version of this array type; use it as 1925 // the canonical type for a newly-built type. 1926 New = new (*this, TypeAlignment) 1927 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1928 SizeExpr, AttrLoc); 1929 } else { 1930 QualType CanonVecTy = getCanonicalType(vecType); 1931 if (CanonVecTy == vecType) { 1932 New = new (*this, TypeAlignment) 1933 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1934 AttrLoc); 1935 1936 DependentSizedExtVectorType *CanonCheck 1937 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1938 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1939 (void)CanonCheck; 1940 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1941 } else { 1942 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1943 SourceLocation()); 1944 New = new (*this, TypeAlignment) 1945 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1946 } 1947 } 1948 1949 Types.push_back(New); 1950 return QualType(New, 0); 1951} 1952 1953/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1954/// 1955QualType 1956ASTContext::getFunctionNoProtoType(QualType ResultTy, 1957 const FunctionType::ExtInfo &Info) const { 1958 const CallingConv DefaultCC = Info.getCC(); 1959 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 1960 CC_X86StdCall : DefaultCC; 1961 // Unique functions, to guarantee there is only one function of a particular 1962 // structure. 1963 llvm::FoldingSetNodeID ID; 1964 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1965 1966 void *InsertPos = 0; 1967 if (FunctionNoProtoType *FT = 1968 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1969 return QualType(FT, 0); 1970 1971 QualType Canonical; 1972 if (!ResultTy.isCanonical() || 1973 getCanonicalCallConv(CallConv) != CallConv) { 1974 Canonical = 1975 getFunctionNoProtoType(getCanonicalType(ResultTy), 1976 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1977 1978 // Get the new insert position for the node we care about. 1979 FunctionNoProtoType *NewIP = 1980 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1981 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1982 } 1983 1984 FunctionProtoType::ExtInfo newInfo = Info.withCallingConv(CallConv); 1985 FunctionNoProtoType *New = new (*this, TypeAlignment) 1986 FunctionNoProtoType(ResultTy, Canonical, newInfo); 1987 Types.push_back(New); 1988 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1989 return QualType(New, 0); 1990} 1991 1992/// getFunctionType - Return a normal function type with a typed argument 1993/// list. isVariadic indicates whether the argument list includes '...'. 1994QualType 1995ASTContext::getFunctionType(QualType ResultTy, 1996 const QualType *ArgArray, unsigned NumArgs, 1997 const FunctionProtoType::ExtProtoInfo &EPI) const { 1998 // Unique functions, to guarantee there is only one function of a particular 1999 // structure. 2000 llvm::FoldingSetNodeID ID; 2001 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, EPI, *this); 2002 2003 void *InsertPos = 0; 2004 if (FunctionProtoType *FTP = 2005 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2006 return QualType(FTP, 0); 2007 2008 // Determine whether the type being created is already canonical or not. 2009 bool isCanonical= EPI.ExceptionSpecType == EST_None && ResultTy.isCanonical(); 2010 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 2011 if (!ArgArray[i].isCanonicalAsParam()) 2012 isCanonical = false; 2013 2014 const CallingConv DefaultCC = EPI.ExtInfo.getCC(); 2015 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 2016 CC_X86StdCall : DefaultCC; 2017 2018 // If this type isn't canonical, get the canonical version of it. 2019 // The exception spec is not part of the canonical type. 2020 QualType Canonical; 2021 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 2022 llvm::SmallVector<QualType, 16> CanonicalArgs; 2023 CanonicalArgs.reserve(NumArgs); 2024 for (unsigned i = 0; i != NumArgs; ++i) 2025 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 2026 2027 FunctionProtoType::ExtProtoInfo CanonicalEPI = EPI; 2028 CanonicalEPI.ExceptionSpecType = EST_None; 2029 CanonicalEPI.NumExceptions = 0; 2030 CanonicalEPI.ExtInfo 2031 = CanonicalEPI.ExtInfo.withCallingConv(getCanonicalCallConv(CallConv)); 2032 2033 Canonical = getFunctionType(getCanonicalType(ResultTy), 2034 CanonicalArgs.data(), NumArgs, 2035 CanonicalEPI); 2036 2037 // Get the new insert position for the node we care about. 2038 FunctionProtoType *NewIP = 2039 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 2040 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2041 } 2042 2043 // FunctionProtoType objects are allocated with extra bytes after them 2044 // for two variable size arrays (for parameter and exception types) at the 2045 // end of them. Instead of the exception types, there could be a noexcept 2046 // expression and a context pointer. 2047 size_t Size = sizeof(FunctionProtoType) + 2048 NumArgs * sizeof(QualType); 2049 if (EPI.ExceptionSpecType == EST_Dynamic) 2050 Size += EPI.NumExceptions * sizeof(QualType); 2051 else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2052 Size += sizeof(Expr*); 2053 } 2054 FunctionProtoType *FTP = (FunctionProtoType*) Allocate(Size, TypeAlignment); 2055 FunctionProtoType::ExtProtoInfo newEPI = EPI; 2056 newEPI.ExtInfo = EPI.ExtInfo.withCallingConv(CallConv); 2057 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, Canonical, newEPI); 2058 Types.push_back(FTP); 2059 FunctionProtoTypes.InsertNode(FTP, InsertPos); 2060 return QualType(FTP, 0); 2061} 2062 2063#ifndef NDEBUG 2064static bool NeedsInjectedClassNameType(const RecordDecl *D) { 2065 if (!isa<CXXRecordDecl>(D)) return false; 2066 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 2067 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 2068 return true; 2069 if (RD->getDescribedClassTemplate() && 2070 !isa<ClassTemplateSpecializationDecl>(RD)) 2071 return true; 2072 return false; 2073} 2074#endif 2075 2076/// getInjectedClassNameType - Return the unique reference to the 2077/// injected class name type for the specified templated declaration. 2078QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 2079 QualType TST) const { 2080 assert(NeedsInjectedClassNameType(Decl)); 2081 if (Decl->TypeForDecl) { 2082 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2083 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDeclaration()) { 2084 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 2085 Decl->TypeForDecl = PrevDecl->TypeForDecl; 2086 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2087 } else { 2088 Type *newType = 2089 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 2090 Decl->TypeForDecl = newType; 2091 Types.push_back(newType); 2092 } 2093 return QualType(Decl->TypeForDecl, 0); 2094} 2095 2096/// getTypeDeclType - Return the unique reference to the type for the 2097/// specified type declaration. 2098QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) const { 2099 assert(Decl && "Passed null for Decl param"); 2100 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 2101 2102 if (const TypedefNameDecl *Typedef = dyn_cast<TypedefNameDecl>(Decl)) 2103 return getTypedefType(Typedef); 2104 2105 assert(!isa<TemplateTypeParmDecl>(Decl) && 2106 "Template type parameter types are always available."); 2107 2108 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 2109 assert(!Record->getPreviousDeclaration() && 2110 "struct/union has previous declaration"); 2111 assert(!NeedsInjectedClassNameType(Record)); 2112 return getRecordType(Record); 2113 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 2114 assert(!Enum->getPreviousDeclaration() && 2115 "enum has previous declaration"); 2116 return getEnumType(Enum); 2117 } else if (const UnresolvedUsingTypenameDecl *Using = 2118 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 2119 Type *newType = new (*this, TypeAlignment) UnresolvedUsingType(Using); 2120 Decl->TypeForDecl = newType; 2121 Types.push_back(newType); 2122 } else 2123 llvm_unreachable("TypeDecl without a type?"); 2124 2125 return QualType(Decl->TypeForDecl, 0); 2126} 2127 2128/// getTypedefType - Return the unique reference to the type for the 2129/// specified typedef name decl. 2130QualType 2131ASTContext::getTypedefType(const TypedefNameDecl *Decl, 2132 QualType Canonical) const { 2133 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2134 2135 if (Canonical.isNull()) 2136 Canonical = getCanonicalType(Decl->getUnderlyingType()); 2137 TypedefType *newType = new(*this, TypeAlignment) 2138 TypedefType(Type::Typedef, Decl, Canonical); 2139 Decl->TypeForDecl = newType; 2140 Types.push_back(newType); 2141 return QualType(newType, 0); 2142} 2143 2144QualType ASTContext::getRecordType(const RecordDecl *Decl) const { 2145 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2146 2147 if (const RecordDecl *PrevDecl = Decl->getPreviousDeclaration()) 2148 if (PrevDecl->TypeForDecl) 2149 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2150 2151 RecordType *newType = new (*this, TypeAlignment) RecordType(Decl); 2152 Decl->TypeForDecl = newType; 2153 Types.push_back(newType); 2154 return QualType(newType, 0); 2155} 2156 2157QualType ASTContext::getEnumType(const EnumDecl *Decl) const { 2158 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2159 2160 if (const EnumDecl *PrevDecl = Decl->getPreviousDeclaration()) 2161 if (PrevDecl->TypeForDecl) 2162 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2163 2164 EnumType *newType = new (*this, TypeAlignment) EnumType(Decl); 2165 Decl->TypeForDecl = newType; 2166 Types.push_back(newType); 2167 return QualType(newType, 0); 2168} 2169 2170QualType ASTContext::getAttributedType(AttributedType::Kind attrKind, 2171 QualType modifiedType, 2172 QualType equivalentType) { 2173 llvm::FoldingSetNodeID id; 2174 AttributedType::Profile(id, attrKind, modifiedType, equivalentType); 2175 2176 void *insertPos = 0; 2177 AttributedType *type = AttributedTypes.FindNodeOrInsertPos(id, insertPos); 2178 if (type) return QualType(type, 0); 2179 2180 QualType canon = getCanonicalType(equivalentType); 2181 type = new (*this, TypeAlignment) 2182 AttributedType(canon, attrKind, modifiedType, equivalentType); 2183 2184 Types.push_back(type); 2185 AttributedTypes.InsertNode(type, insertPos); 2186 2187 return QualType(type, 0); 2188} 2189 2190 2191/// \brief Retrieve a substitution-result type. 2192QualType 2193ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 2194 QualType Replacement) const { 2195 assert(Replacement.isCanonical() 2196 && "replacement types must always be canonical"); 2197 2198 llvm::FoldingSetNodeID ID; 2199 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 2200 void *InsertPos = 0; 2201 SubstTemplateTypeParmType *SubstParm 2202 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2203 2204 if (!SubstParm) { 2205 SubstParm = new (*this, TypeAlignment) 2206 SubstTemplateTypeParmType(Parm, Replacement); 2207 Types.push_back(SubstParm); 2208 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2209 } 2210 2211 return QualType(SubstParm, 0); 2212} 2213 2214/// \brief Retrieve a 2215QualType ASTContext::getSubstTemplateTypeParmPackType( 2216 const TemplateTypeParmType *Parm, 2217 const TemplateArgument &ArgPack) { 2218#ifndef NDEBUG 2219 for (TemplateArgument::pack_iterator P = ArgPack.pack_begin(), 2220 PEnd = ArgPack.pack_end(); 2221 P != PEnd; ++P) { 2222 assert(P->getKind() == TemplateArgument::Type &&"Pack contains a non-type"); 2223 assert(P->getAsType().isCanonical() && "Pack contains non-canonical type"); 2224 } 2225#endif 2226 2227 llvm::FoldingSetNodeID ID; 2228 SubstTemplateTypeParmPackType::Profile(ID, Parm, ArgPack); 2229 void *InsertPos = 0; 2230 if (SubstTemplateTypeParmPackType *SubstParm 2231 = SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos)) 2232 return QualType(SubstParm, 0); 2233 2234 QualType Canon; 2235 if (!Parm->isCanonicalUnqualified()) { 2236 Canon = getCanonicalType(QualType(Parm, 0)); 2237 Canon = getSubstTemplateTypeParmPackType(cast<TemplateTypeParmType>(Canon), 2238 ArgPack); 2239 SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos); 2240 } 2241 2242 SubstTemplateTypeParmPackType *SubstParm 2243 = new (*this, TypeAlignment) SubstTemplateTypeParmPackType(Parm, Canon, 2244 ArgPack); 2245 Types.push_back(SubstParm); 2246 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2247 return QualType(SubstParm, 0); 2248} 2249 2250/// \brief Retrieve the template type parameter type for a template 2251/// parameter or parameter pack with the given depth, index, and (optionally) 2252/// name. 2253QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 2254 bool ParameterPack, 2255 TemplateTypeParmDecl *TTPDecl) const { 2256 llvm::FoldingSetNodeID ID; 2257 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, TTPDecl); 2258 void *InsertPos = 0; 2259 TemplateTypeParmType *TypeParm 2260 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2261 2262 if (TypeParm) 2263 return QualType(TypeParm, 0); 2264 2265 if (TTPDecl) { 2266 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 2267 TypeParm = new (*this, TypeAlignment) TemplateTypeParmType(TTPDecl, Canon); 2268 2269 TemplateTypeParmType *TypeCheck 2270 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2271 assert(!TypeCheck && "Template type parameter canonical type broken"); 2272 (void)TypeCheck; 2273 } else 2274 TypeParm = new (*this, TypeAlignment) 2275 TemplateTypeParmType(Depth, Index, ParameterPack); 2276 2277 Types.push_back(TypeParm); 2278 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 2279 2280 return QualType(TypeParm, 0); 2281} 2282 2283TypeSourceInfo * 2284ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 2285 SourceLocation NameLoc, 2286 const TemplateArgumentListInfo &Args, 2287 QualType Underlying) const { 2288 assert(!Name.getAsDependentTemplateName() && 2289 "No dependent template names here!"); 2290 QualType TST = getTemplateSpecializationType(Name, Args, Underlying); 2291 2292 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 2293 TemplateSpecializationTypeLoc TL 2294 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 2295 TL.setTemplateNameLoc(NameLoc); 2296 TL.setLAngleLoc(Args.getLAngleLoc()); 2297 TL.setRAngleLoc(Args.getRAngleLoc()); 2298 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 2299 TL.setArgLocInfo(i, Args[i].getLocInfo()); 2300 return DI; 2301} 2302 2303QualType 2304ASTContext::getTemplateSpecializationType(TemplateName Template, 2305 const TemplateArgumentListInfo &Args, 2306 QualType Underlying) const { 2307 assert(!Template.getAsDependentTemplateName() && 2308 "No dependent template names here!"); 2309 2310 unsigned NumArgs = Args.size(); 2311 2312 llvm::SmallVector<TemplateArgument, 4> ArgVec; 2313 ArgVec.reserve(NumArgs); 2314 for (unsigned i = 0; i != NumArgs; ++i) 2315 ArgVec.push_back(Args[i].getArgument()); 2316 2317 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 2318 Underlying); 2319} 2320 2321QualType 2322ASTContext::getTemplateSpecializationType(TemplateName Template, 2323 const TemplateArgument *Args, 2324 unsigned NumArgs, 2325 QualType Underlying) const { 2326 assert(!Template.getAsDependentTemplateName() && 2327 "No dependent template names here!"); 2328 // Look through qualified template names. 2329 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2330 Template = TemplateName(QTN->getTemplateDecl()); 2331 2332 bool isTypeAlias = 2333 Template.getAsTemplateDecl() && 2334 isa<TypeAliasTemplateDecl>(Template.getAsTemplateDecl()); 2335 2336 QualType CanonType; 2337 if (!Underlying.isNull()) 2338 CanonType = getCanonicalType(Underlying); 2339 else { 2340 assert(!isTypeAlias && 2341 "Underlying type for template alias must be computed by caller"); 2342 CanonType = getCanonicalTemplateSpecializationType(Template, Args, 2343 NumArgs); 2344 } 2345 2346 // Allocate the (non-canonical) template specialization type, but don't 2347 // try to unique it: these types typically have location information that 2348 // we don't unique and don't want to lose. 2349 void *Mem = Allocate(sizeof(TemplateSpecializationType) + 2350 sizeof(TemplateArgument) * NumArgs + 2351 (isTypeAlias ? sizeof(QualType) : 0), 2352 TypeAlignment); 2353 TemplateSpecializationType *Spec 2354 = new (Mem) TemplateSpecializationType(Template, 2355 Args, NumArgs, 2356 CanonType, 2357 isTypeAlias ? Underlying : QualType()); 2358 2359 Types.push_back(Spec); 2360 return QualType(Spec, 0); 2361} 2362 2363QualType 2364ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template, 2365 const TemplateArgument *Args, 2366 unsigned NumArgs) const { 2367 assert(!Template.getAsDependentTemplateName() && 2368 "No dependent template names here!"); 2369 assert((!Template.getAsTemplateDecl() || 2370 !isa<TypeAliasTemplateDecl>(Template.getAsTemplateDecl())) && 2371 "Underlying type for template alias must be computed by caller"); 2372 2373 // Look through qualified template names. 2374 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2375 Template = TemplateName(QTN->getTemplateDecl()); 2376 2377 // Build the canonical template specialization type. 2378 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 2379 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 2380 CanonArgs.reserve(NumArgs); 2381 for (unsigned I = 0; I != NumArgs; ++I) 2382 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 2383 2384 // Determine whether this canonical template specialization type already 2385 // exists. 2386 llvm::FoldingSetNodeID ID; 2387 TemplateSpecializationType::Profile(ID, CanonTemplate, 2388 CanonArgs.data(), NumArgs, *this); 2389 2390 void *InsertPos = 0; 2391 TemplateSpecializationType *Spec 2392 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2393 2394 if (!Spec) { 2395 // Allocate a new canonical template specialization type. 2396 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2397 sizeof(TemplateArgument) * NumArgs), 2398 TypeAlignment); 2399 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 2400 CanonArgs.data(), NumArgs, 2401 QualType(), QualType()); 2402 Types.push_back(Spec); 2403 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 2404 } 2405 2406 assert(Spec->isDependentType() && 2407 "Non-dependent template-id type must have a canonical type"); 2408 return QualType(Spec, 0); 2409} 2410 2411QualType 2412ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 2413 NestedNameSpecifier *NNS, 2414 QualType NamedType) const { 2415 llvm::FoldingSetNodeID ID; 2416 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 2417 2418 void *InsertPos = 0; 2419 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2420 if (T) 2421 return QualType(T, 0); 2422 2423 QualType Canon = NamedType; 2424 if (!Canon.isCanonical()) { 2425 Canon = getCanonicalType(NamedType); 2426 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2427 assert(!CheckT && "Elaborated canonical type broken"); 2428 (void)CheckT; 2429 } 2430 2431 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 2432 Types.push_back(T); 2433 ElaboratedTypes.InsertNode(T, InsertPos); 2434 return QualType(T, 0); 2435} 2436 2437QualType 2438ASTContext::getParenType(QualType InnerType) const { 2439 llvm::FoldingSetNodeID ID; 2440 ParenType::Profile(ID, InnerType); 2441 2442 void *InsertPos = 0; 2443 ParenType *T = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2444 if (T) 2445 return QualType(T, 0); 2446 2447 QualType Canon = InnerType; 2448 if (!Canon.isCanonical()) { 2449 Canon = getCanonicalType(InnerType); 2450 ParenType *CheckT = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2451 assert(!CheckT && "Paren canonical type broken"); 2452 (void)CheckT; 2453 } 2454 2455 T = new (*this) ParenType(InnerType, Canon); 2456 Types.push_back(T); 2457 ParenTypes.InsertNode(T, InsertPos); 2458 return QualType(T, 0); 2459} 2460 2461QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 2462 NestedNameSpecifier *NNS, 2463 const IdentifierInfo *Name, 2464 QualType Canon) const { 2465 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2466 2467 if (Canon.isNull()) { 2468 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2469 ElaboratedTypeKeyword CanonKeyword = Keyword; 2470 if (Keyword == ETK_None) 2471 CanonKeyword = ETK_Typename; 2472 2473 if (CanonNNS != NNS || CanonKeyword != Keyword) 2474 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 2475 } 2476 2477 llvm::FoldingSetNodeID ID; 2478 DependentNameType::Profile(ID, Keyword, NNS, Name); 2479 2480 void *InsertPos = 0; 2481 DependentNameType *T 2482 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2483 if (T) 2484 return QualType(T, 0); 2485 2486 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 2487 Types.push_back(T); 2488 DependentNameTypes.InsertNode(T, InsertPos); 2489 return QualType(T, 0); 2490} 2491 2492QualType 2493ASTContext::getDependentTemplateSpecializationType( 2494 ElaboratedTypeKeyword Keyword, 2495 NestedNameSpecifier *NNS, 2496 const IdentifierInfo *Name, 2497 const TemplateArgumentListInfo &Args) const { 2498 // TODO: avoid this copy 2499 llvm::SmallVector<TemplateArgument, 16> ArgCopy; 2500 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2501 ArgCopy.push_back(Args[I].getArgument()); 2502 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2503 ArgCopy.size(), 2504 ArgCopy.data()); 2505} 2506 2507QualType 2508ASTContext::getDependentTemplateSpecializationType( 2509 ElaboratedTypeKeyword Keyword, 2510 NestedNameSpecifier *NNS, 2511 const IdentifierInfo *Name, 2512 unsigned NumArgs, 2513 const TemplateArgument *Args) const { 2514 assert((!NNS || NNS->isDependent()) && 2515 "nested-name-specifier must be dependent"); 2516 2517 llvm::FoldingSetNodeID ID; 2518 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2519 Name, NumArgs, Args); 2520 2521 void *InsertPos = 0; 2522 DependentTemplateSpecializationType *T 2523 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2524 if (T) 2525 return QualType(T, 0); 2526 2527 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2528 2529 ElaboratedTypeKeyword CanonKeyword = Keyword; 2530 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2531 2532 bool AnyNonCanonArgs = false; 2533 llvm::SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2534 for (unsigned I = 0; I != NumArgs; ++I) { 2535 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2536 if (!CanonArgs[I].structurallyEquals(Args[I])) 2537 AnyNonCanonArgs = true; 2538 } 2539 2540 QualType Canon; 2541 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2542 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2543 Name, NumArgs, 2544 CanonArgs.data()); 2545 2546 // Find the insert position again. 2547 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2548 } 2549 2550 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2551 sizeof(TemplateArgument) * NumArgs), 2552 TypeAlignment); 2553 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2554 Name, NumArgs, Args, Canon); 2555 Types.push_back(T); 2556 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2557 return QualType(T, 0); 2558} 2559 2560QualType ASTContext::getPackExpansionType(QualType Pattern, 2561 llvm::Optional<unsigned> NumExpansions) { 2562 llvm::FoldingSetNodeID ID; 2563 PackExpansionType::Profile(ID, Pattern, NumExpansions); 2564 2565 assert(Pattern->containsUnexpandedParameterPack() && 2566 "Pack expansions must expand one or more parameter packs"); 2567 void *InsertPos = 0; 2568 PackExpansionType *T 2569 = PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2570 if (T) 2571 return QualType(T, 0); 2572 2573 QualType Canon; 2574 if (!Pattern.isCanonical()) { 2575 Canon = getPackExpansionType(getCanonicalType(Pattern), NumExpansions); 2576 2577 // Find the insert position again. 2578 PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2579 } 2580 2581 T = new (*this) PackExpansionType(Pattern, Canon, NumExpansions); 2582 Types.push_back(T); 2583 PackExpansionTypes.InsertNode(T, InsertPos); 2584 return QualType(T, 0); 2585} 2586 2587/// CmpProtocolNames - Comparison predicate for sorting protocols 2588/// alphabetically. 2589static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2590 const ObjCProtocolDecl *RHS) { 2591 return LHS->getDeclName() < RHS->getDeclName(); 2592} 2593 2594static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2595 unsigned NumProtocols) { 2596 if (NumProtocols == 0) return true; 2597 2598 for (unsigned i = 1; i != NumProtocols; ++i) 2599 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2600 return false; 2601 return true; 2602} 2603 2604static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2605 unsigned &NumProtocols) { 2606 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2607 2608 // Sort protocols, keyed by name. 2609 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2610 2611 // Remove duplicates. 2612 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2613 NumProtocols = ProtocolsEnd-Protocols; 2614} 2615 2616QualType ASTContext::getObjCObjectType(QualType BaseType, 2617 ObjCProtocolDecl * const *Protocols, 2618 unsigned NumProtocols) const { 2619 // If the base type is an interface and there aren't any protocols 2620 // to add, then the interface type will do just fine. 2621 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2622 return BaseType; 2623 2624 // Look in the folding set for an existing type. 2625 llvm::FoldingSetNodeID ID; 2626 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2627 void *InsertPos = 0; 2628 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2629 return QualType(QT, 0); 2630 2631 // Build the canonical type, which has the canonical base type and 2632 // a sorted-and-uniqued list of protocols. 2633 QualType Canonical; 2634 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2635 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2636 if (!ProtocolsSorted) { 2637 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2638 Protocols + NumProtocols); 2639 unsigned UniqueCount = NumProtocols; 2640 2641 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2642 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2643 &Sorted[0], UniqueCount); 2644 } else { 2645 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2646 Protocols, NumProtocols); 2647 } 2648 2649 // Regenerate InsertPos. 2650 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2651 } 2652 2653 unsigned Size = sizeof(ObjCObjectTypeImpl); 2654 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2655 void *Mem = Allocate(Size, TypeAlignment); 2656 ObjCObjectTypeImpl *T = 2657 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2658 2659 Types.push_back(T); 2660 ObjCObjectTypes.InsertNode(T, InsertPos); 2661 return QualType(T, 0); 2662} 2663 2664/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2665/// the given object type. 2666QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) const { 2667 llvm::FoldingSetNodeID ID; 2668 ObjCObjectPointerType::Profile(ID, ObjectT); 2669 2670 void *InsertPos = 0; 2671 if (ObjCObjectPointerType *QT = 2672 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2673 return QualType(QT, 0); 2674 2675 // Find the canonical object type. 2676 QualType Canonical; 2677 if (!ObjectT.isCanonical()) { 2678 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2679 2680 // Regenerate InsertPos. 2681 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2682 } 2683 2684 // No match. 2685 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2686 ObjCObjectPointerType *QType = 2687 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2688 2689 Types.push_back(QType); 2690 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2691 return QualType(QType, 0); 2692} 2693 2694/// getObjCInterfaceType - Return the unique reference to the type for the 2695/// specified ObjC interface decl. The list of protocols is optional. 2696QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) const { 2697 if (Decl->TypeForDecl) 2698 return QualType(Decl->TypeForDecl, 0); 2699 2700 // FIXME: redeclarations? 2701 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2702 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2703 Decl->TypeForDecl = T; 2704 Types.push_back(T); 2705 return QualType(T, 0); 2706} 2707 2708/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2709/// TypeOfExprType AST's (since expression's are never shared). For example, 2710/// multiple declarations that refer to "typeof(x)" all contain different 2711/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2712/// on canonical type's (which are always unique). 2713QualType ASTContext::getTypeOfExprType(Expr *tofExpr) const { 2714 TypeOfExprType *toe; 2715 if (tofExpr->isTypeDependent()) { 2716 llvm::FoldingSetNodeID ID; 2717 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2718 2719 void *InsertPos = 0; 2720 DependentTypeOfExprType *Canon 2721 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2722 if (Canon) { 2723 // We already have a "canonical" version of an identical, dependent 2724 // typeof(expr) type. Use that as our canonical type. 2725 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2726 QualType((TypeOfExprType*)Canon, 0)); 2727 } 2728 else { 2729 // Build a new, canonical typeof(expr) type. 2730 Canon 2731 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2732 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2733 toe = Canon; 2734 } 2735 } else { 2736 QualType Canonical = getCanonicalType(tofExpr->getType()); 2737 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2738 } 2739 Types.push_back(toe); 2740 return QualType(toe, 0); 2741} 2742 2743/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2744/// TypeOfType AST's. The only motivation to unique these nodes would be 2745/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2746/// an issue. This doesn't effect the type checker, since it operates 2747/// on canonical type's (which are always unique). 2748QualType ASTContext::getTypeOfType(QualType tofType) const { 2749 QualType Canonical = getCanonicalType(tofType); 2750 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2751 Types.push_back(tot); 2752 return QualType(tot, 0); 2753} 2754 2755/// getDecltypeForExpr - Given an expr, will return the decltype for that 2756/// expression, according to the rules in C++0x [dcl.type.simple]p4 2757static QualType getDecltypeForExpr(const Expr *e, const ASTContext &Context) { 2758 if (e->isTypeDependent()) 2759 return Context.DependentTy; 2760 2761 // If e is an id expression or a class member access, decltype(e) is defined 2762 // as the type of the entity named by e. 2763 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2764 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2765 return VD->getType(); 2766 } 2767 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2768 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2769 return FD->getType(); 2770 } 2771 // If e is a function call or an invocation of an overloaded operator, 2772 // (parentheses around e are ignored), decltype(e) is defined as the 2773 // return type of that function. 2774 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2775 return CE->getCallReturnType(); 2776 2777 QualType T = e->getType(); 2778 2779 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2780 // defined as T&, otherwise decltype(e) is defined as T. 2781 if (e->isLValue()) 2782 T = Context.getLValueReferenceType(T); 2783 2784 return T; 2785} 2786 2787/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2788/// DecltypeType AST's. The only motivation to unique these nodes would be 2789/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2790/// an issue. This doesn't effect the type checker, since it operates 2791/// on canonical type's (which are always unique). 2792QualType ASTContext::getDecltypeType(Expr *e) const { 2793 DecltypeType *dt; 2794 if (e->isTypeDependent()) { 2795 llvm::FoldingSetNodeID ID; 2796 DependentDecltypeType::Profile(ID, *this, e); 2797 2798 void *InsertPos = 0; 2799 DependentDecltypeType *Canon 2800 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2801 if (Canon) { 2802 // We already have a "canonical" version of an equivalent, dependent 2803 // decltype type. Use that as our canonical type. 2804 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2805 QualType((DecltypeType*)Canon, 0)); 2806 } 2807 else { 2808 // Build a new, canonical typeof(expr) type. 2809 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2810 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2811 dt = Canon; 2812 } 2813 } else { 2814 QualType T = getDecltypeForExpr(e, *this); 2815 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2816 } 2817 Types.push_back(dt); 2818 return QualType(dt, 0); 2819} 2820 2821/// getUnaryTransformationType - We don't unique these, since the memory 2822/// savings are minimal and these are rare. 2823QualType ASTContext::getUnaryTransformType(QualType BaseType, 2824 QualType UnderlyingType, 2825 UnaryTransformType::UTTKind Kind) 2826 const { 2827 UnaryTransformType *Ty = 2828 new (*this, TypeAlignment) UnaryTransformType (BaseType, UnderlyingType, 2829 Kind, 2830 UnderlyingType->isDependentType() ? 2831 QualType() : UnderlyingType); 2832 Types.push_back(Ty); 2833 return QualType(Ty, 0); 2834} 2835 2836/// getAutoType - We only unique auto types after they've been deduced. 2837QualType ASTContext::getAutoType(QualType DeducedType) const { 2838 void *InsertPos = 0; 2839 if (!DeducedType.isNull()) { 2840 // Look in the folding set for an existing type. 2841 llvm::FoldingSetNodeID ID; 2842 AutoType::Profile(ID, DeducedType); 2843 if (AutoType *AT = AutoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2844 return QualType(AT, 0); 2845 } 2846 2847 AutoType *AT = new (*this, TypeAlignment) AutoType(DeducedType); 2848 Types.push_back(AT); 2849 if (InsertPos) 2850 AutoTypes.InsertNode(AT, InsertPos); 2851 return QualType(AT, 0); 2852} 2853 2854/// getAutoDeductType - Get type pattern for deducing against 'auto'. 2855QualType ASTContext::getAutoDeductType() const { 2856 if (AutoDeductTy.isNull()) 2857 AutoDeductTy = getAutoType(QualType()); 2858 assert(!AutoDeductTy.isNull() && "can't build 'auto' pattern"); 2859 return AutoDeductTy; 2860} 2861 2862/// getAutoRRefDeductType - Get type pattern for deducing against 'auto &&'. 2863QualType ASTContext::getAutoRRefDeductType() const { 2864 if (AutoRRefDeductTy.isNull()) 2865 AutoRRefDeductTy = getRValueReferenceType(getAutoDeductType()); 2866 assert(!AutoRRefDeductTy.isNull() && "can't build 'auto &&' pattern"); 2867 return AutoRRefDeductTy; 2868} 2869 2870/// getTagDeclType - Return the unique reference to the type for the 2871/// specified TagDecl (struct/union/class/enum) decl. 2872QualType ASTContext::getTagDeclType(const TagDecl *Decl) const { 2873 assert (Decl); 2874 // FIXME: What is the design on getTagDeclType when it requires casting 2875 // away const? mutable? 2876 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2877} 2878 2879/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2880/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2881/// needs to agree with the definition in <stddef.h>. 2882CanQualType ASTContext::getSizeType() const { 2883 return getFromTargetType(Target.getSizeType()); 2884} 2885 2886/// getSignedWCharType - Return the type of "signed wchar_t". 2887/// Used when in C++, as a GCC extension. 2888QualType ASTContext::getSignedWCharType() const { 2889 // FIXME: derive from "Target" ? 2890 return WCharTy; 2891} 2892 2893/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2894/// Used when in C++, as a GCC extension. 2895QualType ASTContext::getUnsignedWCharType() const { 2896 // FIXME: derive from "Target" ? 2897 return UnsignedIntTy; 2898} 2899 2900/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2901/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2902QualType ASTContext::getPointerDiffType() const { 2903 return getFromTargetType(Target.getPtrDiffType(0)); 2904} 2905 2906//===----------------------------------------------------------------------===// 2907// Type Operators 2908//===----------------------------------------------------------------------===// 2909 2910CanQualType ASTContext::getCanonicalParamType(QualType T) const { 2911 // Push qualifiers into arrays, and then discard any remaining 2912 // qualifiers. 2913 T = getCanonicalType(T); 2914 T = getVariableArrayDecayedType(T); 2915 const Type *Ty = T.getTypePtr(); 2916 QualType Result; 2917 if (isa<ArrayType>(Ty)) { 2918 Result = getArrayDecayedType(QualType(Ty,0)); 2919 } else if (isa<FunctionType>(Ty)) { 2920 Result = getPointerType(QualType(Ty, 0)); 2921 } else { 2922 Result = QualType(Ty, 0); 2923 } 2924 2925 return CanQualType::CreateUnsafe(Result); 2926} 2927 2928 2929QualType ASTContext::getUnqualifiedArrayType(QualType type, 2930 Qualifiers &quals) { 2931 SplitQualType splitType = type.getSplitUnqualifiedType(); 2932 2933 // FIXME: getSplitUnqualifiedType() actually walks all the way to 2934 // the unqualified desugared type and then drops it on the floor. 2935 // We then have to strip that sugar back off with 2936 // getUnqualifiedDesugaredType(), which is silly. 2937 const ArrayType *AT = 2938 dyn_cast<ArrayType>(splitType.first->getUnqualifiedDesugaredType()); 2939 2940 // If we don't have an array, just use the results in splitType. 2941 if (!AT) { 2942 quals = splitType.second; 2943 return QualType(splitType.first, 0); 2944 } 2945 2946 // Otherwise, recurse on the array's element type. 2947 QualType elementType = AT->getElementType(); 2948 QualType unqualElementType = getUnqualifiedArrayType(elementType, quals); 2949 2950 // If that didn't change the element type, AT has no qualifiers, so we 2951 // can just use the results in splitType. 2952 if (elementType == unqualElementType) { 2953 assert(quals.empty()); // from the recursive call 2954 quals = splitType.second; 2955 return QualType(splitType.first, 0); 2956 } 2957 2958 // Otherwise, add in the qualifiers from the outermost type, then 2959 // build the type back up. 2960 quals.addConsistentQualifiers(splitType.second); 2961 2962 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 2963 return getConstantArrayType(unqualElementType, CAT->getSize(), 2964 CAT->getSizeModifier(), 0); 2965 } 2966 2967 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 2968 return getIncompleteArrayType(unqualElementType, IAT->getSizeModifier(), 0); 2969 } 2970 2971 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 2972 return getVariableArrayType(unqualElementType, 2973 VAT->getSizeExpr(), 2974 VAT->getSizeModifier(), 2975 VAT->getIndexTypeCVRQualifiers(), 2976 VAT->getBracketsRange()); 2977 } 2978 2979 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 2980 return getDependentSizedArrayType(unqualElementType, DSAT->getSizeExpr(), 2981 DSAT->getSizeModifier(), 0, 2982 SourceRange()); 2983} 2984 2985/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 2986/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 2987/// they point to and return true. If T1 and T2 aren't pointer types 2988/// or pointer-to-member types, or if they are not similar at this 2989/// level, returns false and leaves T1 and T2 unchanged. Top-level 2990/// qualifiers on T1 and T2 are ignored. This function will typically 2991/// be called in a loop that successively "unwraps" pointer and 2992/// pointer-to-member types to compare them at each level. 2993bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 2994 const PointerType *T1PtrType = T1->getAs<PointerType>(), 2995 *T2PtrType = T2->getAs<PointerType>(); 2996 if (T1PtrType && T2PtrType) { 2997 T1 = T1PtrType->getPointeeType(); 2998 T2 = T2PtrType->getPointeeType(); 2999 return true; 3000 } 3001 3002 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 3003 *T2MPType = T2->getAs<MemberPointerType>(); 3004 if (T1MPType && T2MPType && 3005 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 3006 QualType(T2MPType->getClass(), 0))) { 3007 T1 = T1MPType->getPointeeType(); 3008 T2 = T2MPType->getPointeeType(); 3009 return true; 3010 } 3011 3012 if (getLangOptions().ObjC1) { 3013 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 3014 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 3015 if (T1OPType && T2OPType) { 3016 T1 = T1OPType->getPointeeType(); 3017 T2 = T2OPType->getPointeeType(); 3018 return true; 3019 } 3020 } 3021 3022 // FIXME: Block pointers, too? 3023 3024 return false; 3025} 3026 3027DeclarationNameInfo 3028ASTContext::getNameForTemplate(TemplateName Name, 3029 SourceLocation NameLoc) const { 3030 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 3031 // DNInfo work in progress: CHECKME: what about DNLoc? 3032 return DeclarationNameInfo(TD->getDeclName(), NameLoc); 3033 3034 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 3035 DeclarationName DName; 3036 if (DTN->isIdentifier()) { 3037 DName = DeclarationNames.getIdentifier(DTN->getIdentifier()); 3038 return DeclarationNameInfo(DName, NameLoc); 3039 } else { 3040 DName = DeclarationNames.getCXXOperatorName(DTN->getOperator()); 3041 // DNInfo work in progress: FIXME: source locations? 3042 DeclarationNameLoc DNLoc; 3043 DNLoc.CXXOperatorName.BeginOpNameLoc = SourceLocation().getRawEncoding(); 3044 DNLoc.CXXOperatorName.EndOpNameLoc = SourceLocation().getRawEncoding(); 3045 return DeclarationNameInfo(DName, NameLoc, DNLoc); 3046 } 3047 } 3048 3049 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 3050 assert(Storage); 3051 // DNInfo work in progress: CHECKME: what about DNLoc? 3052 return DeclarationNameInfo((*Storage->begin())->getDeclName(), NameLoc); 3053} 3054 3055TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) const { 3056 if (TemplateDecl *Template = Name.getAsTemplateDecl()) { 3057 if (TemplateTemplateParmDecl *TTP 3058 = dyn_cast<TemplateTemplateParmDecl>(Template)) 3059 Template = getCanonicalTemplateTemplateParmDecl(TTP); 3060 3061 // The canonical template name is the canonical template declaration. 3062 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 3063 } 3064 3065 if (SubstTemplateTemplateParmPackStorage *SubstPack 3066 = Name.getAsSubstTemplateTemplateParmPack()) { 3067 TemplateTemplateParmDecl *CanonParam 3068 = getCanonicalTemplateTemplateParmDecl(SubstPack->getParameterPack()); 3069 TemplateArgument CanonArgPack 3070 = getCanonicalTemplateArgument(SubstPack->getArgumentPack()); 3071 return getSubstTemplateTemplateParmPack(CanonParam, CanonArgPack); 3072 } 3073 3074 assert(!Name.getAsOverloadedTemplate()); 3075 3076 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 3077 assert(DTN && "Non-dependent template names must refer to template decls."); 3078 return DTN->CanonicalTemplateName; 3079} 3080 3081bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 3082 X = getCanonicalTemplateName(X); 3083 Y = getCanonicalTemplateName(Y); 3084 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 3085} 3086 3087TemplateArgument 3088ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) const { 3089 switch (Arg.getKind()) { 3090 case TemplateArgument::Null: 3091 return Arg; 3092 3093 case TemplateArgument::Expression: 3094 return Arg; 3095 3096 case TemplateArgument::Declaration: 3097 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 3098 3099 case TemplateArgument::Template: 3100 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 3101 3102 case TemplateArgument::TemplateExpansion: 3103 return TemplateArgument(getCanonicalTemplateName( 3104 Arg.getAsTemplateOrTemplatePattern()), 3105 Arg.getNumTemplateExpansions()); 3106 3107 case TemplateArgument::Integral: 3108 return TemplateArgument(*Arg.getAsIntegral(), 3109 getCanonicalType(Arg.getIntegralType())); 3110 3111 case TemplateArgument::Type: 3112 return TemplateArgument(getCanonicalType(Arg.getAsType())); 3113 3114 case TemplateArgument::Pack: { 3115 if (Arg.pack_size() == 0) 3116 return Arg; 3117 3118 TemplateArgument *CanonArgs 3119 = new (*this) TemplateArgument[Arg.pack_size()]; 3120 unsigned Idx = 0; 3121 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 3122 AEnd = Arg.pack_end(); 3123 A != AEnd; (void)++A, ++Idx) 3124 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 3125 3126 return TemplateArgument(CanonArgs, Arg.pack_size()); 3127 } 3128 } 3129 3130 // Silence GCC warning 3131 assert(false && "Unhandled template argument kind"); 3132 return TemplateArgument(); 3133} 3134 3135NestedNameSpecifier * 3136ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const { 3137 if (!NNS) 3138 return 0; 3139 3140 switch (NNS->getKind()) { 3141 case NestedNameSpecifier::Identifier: 3142 // Canonicalize the prefix but keep the identifier the same. 3143 return NestedNameSpecifier::Create(*this, 3144 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 3145 NNS->getAsIdentifier()); 3146 3147 case NestedNameSpecifier::Namespace: 3148 // A namespace is canonical; build a nested-name-specifier with 3149 // this namespace and no prefix. 3150 return NestedNameSpecifier::Create(*this, 0, 3151 NNS->getAsNamespace()->getOriginalNamespace()); 3152 3153 case NestedNameSpecifier::NamespaceAlias: 3154 // A namespace is canonical; build a nested-name-specifier with 3155 // this namespace and no prefix. 3156 return NestedNameSpecifier::Create(*this, 0, 3157 NNS->getAsNamespaceAlias()->getNamespace() 3158 ->getOriginalNamespace()); 3159 3160 case NestedNameSpecifier::TypeSpec: 3161 case NestedNameSpecifier::TypeSpecWithTemplate: { 3162 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 3163 3164 // If we have some kind of dependent-named type (e.g., "typename T::type"), 3165 // break it apart into its prefix and identifier, then reconsititute those 3166 // as the canonical nested-name-specifier. This is required to canonicalize 3167 // a dependent nested-name-specifier involving typedefs of dependent-name 3168 // types, e.g., 3169 // typedef typename T::type T1; 3170 // typedef typename T1::type T2; 3171 if (const DependentNameType *DNT = T->getAs<DependentNameType>()) { 3172 NestedNameSpecifier *Prefix 3173 = getCanonicalNestedNameSpecifier(DNT->getQualifier()); 3174 return NestedNameSpecifier::Create(*this, Prefix, 3175 const_cast<IdentifierInfo *>(DNT->getIdentifier())); 3176 } 3177 3178 // Do the same thing as above, but with dependent-named specializations. 3179 if (const DependentTemplateSpecializationType *DTST 3180 = T->getAs<DependentTemplateSpecializationType>()) { 3181 NestedNameSpecifier *Prefix 3182 = getCanonicalNestedNameSpecifier(DTST->getQualifier()); 3183 3184 T = getDependentTemplateSpecializationType(DTST->getKeyword(), 3185 Prefix, DTST->getIdentifier(), 3186 DTST->getNumArgs(), 3187 DTST->getArgs()); 3188 T = getCanonicalType(T); 3189 } 3190 3191 return NestedNameSpecifier::Create(*this, 0, false, 3192 const_cast<Type*>(T.getTypePtr())); 3193 } 3194 3195 case NestedNameSpecifier::Global: 3196 // The global specifier is canonical and unique. 3197 return NNS; 3198 } 3199 3200 // Required to silence a GCC warning 3201 return 0; 3202} 3203 3204 3205const ArrayType *ASTContext::getAsArrayType(QualType T) const { 3206 // Handle the non-qualified case efficiently. 3207 if (!T.hasLocalQualifiers()) { 3208 // Handle the common positive case fast. 3209 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 3210 return AT; 3211 } 3212 3213 // Handle the common negative case fast. 3214 if (!isa<ArrayType>(T.getCanonicalType())) 3215 return 0; 3216 3217 // Apply any qualifiers from the array type to the element type. This 3218 // implements C99 6.7.3p8: "If the specification of an array type includes 3219 // any type qualifiers, the element type is so qualified, not the array type." 3220 3221 // If we get here, we either have type qualifiers on the type, or we have 3222 // sugar such as a typedef in the way. If we have type qualifiers on the type 3223 // we must propagate them down into the element type. 3224 3225 SplitQualType split = T.getSplitDesugaredType(); 3226 Qualifiers qs = split.second; 3227 3228 // If we have a simple case, just return now. 3229 const ArrayType *ATy = dyn_cast<ArrayType>(split.first); 3230 if (ATy == 0 || qs.empty()) 3231 return ATy; 3232 3233 // Otherwise, we have an array and we have qualifiers on it. Push the 3234 // qualifiers into the array element type and return a new array type. 3235 QualType NewEltTy = getQualifiedType(ATy->getElementType(), qs); 3236 3237 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 3238 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 3239 CAT->getSizeModifier(), 3240 CAT->getIndexTypeCVRQualifiers())); 3241 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 3242 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 3243 IAT->getSizeModifier(), 3244 IAT->getIndexTypeCVRQualifiers())); 3245 3246 if (const DependentSizedArrayType *DSAT 3247 = dyn_cast<DependentSizedArrayType>(ATy)) 3248 return cast<ArrayType>( 3249 getDependentSizedArrayType(NewEltTy, 3250 DSAT->getSizeExpr(), 3251 DSAT->getSizeModifier(), 3252 DSAT->getIndexTypeCVRQualifiers(), 3253 DSAT->getBracketsRange())); 3254 3255 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 3256 return cast<ArrayType>(getVariableArrayType(NewEltTy, 3257 VAT->getSizeExpr(), 3258 VAT->getSizeModifier(), 3259 VAT->getIndexTypeCVRQualifiers(), 3260 VAT->getBracketsRange())); 3261} 3262 3263/// getArrayDecayedType - Return the properly qualified result of decaying the 3264/// specified array type to a pointer. This operation is non-trivial when 3265/// handling typedefs etc. The canonical type of "T" must be an array type, 3266/// this returns a pointer to a properly qualified element of the array. 3267/// 3268/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 3269QualType ASTContext::getArrayDecayedType(QualType Ty) const { 3270 // Get the element type with 'getAsArrayType' so that we don't lose any 3271 // typedefs in the element type of the array. This also handles propagation 3272 // of type qualifiers from the array type into the element type if present 3273 // (C99 6.7.3p8). 3274 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 3275 assert(PrettyArrayType && "Not an array type!"); 3276 3277 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 3278 3279 // int x[restrict 4] -> int *restrict 3280 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 3281} 3282 3283QualType ASTContext::getBaseElementType(const ArrayType *array) const { 3284 return getBaseElementType(array->getElementType()); 3285} 3286 3287QualType ASTContext::getBaseElementType(QualType type) const { 3288 Qualifiers qs; 3289 while (true) { 3290 SplitQualType split = type.getSplitDesugaredType(); 3291 const ArrayType *array = split.first->getAsArrayTypeUnsafe(); 3292 if (!array) break; 3293 3294 type = array->getElementType(); 3295 qs.addConsistentQualifiers(split.second); 3296 } 3297 3298 return getQualifiedType(type, qs); 3299} 3300 3301/// getConstantArrayElementCount - Returns number of constant array elements. 3302uint64_t 3303ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 3304 uint64_t ElementCount = 1; 3305 do { 3306 ElementCount *= CA->getSize().getZExtValue(); 3307 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 3308 } while (CA); 3309 return ElementCount; 3310} 3311 3312/// getFloatingRank - Return a relative rank for floating point types. 3313/// This routine will assert if passed a built-in type that isn't a float. 3314static FloatingRank getFloatingRank(QualType T) { 3315 if (const ComplexType *CT = T->getAs<ComplexType>()) 3316 return getFloatingRank(CT->getElementType()); 3317 3318 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 3319 switch (T->getAs<BuiltinType>()->getKind()) { 3320 default: assert(0 && "getFloatingRank(): not a floating type"); 3321 case BuiltinType::Float: return FloatRank; 3322 case BuiltinType::Double: return DoubleRank; 3323 case BuiltinType::LongDouble: return LongDoubleRank; 3324 } 3325} 3326 3327/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 3328/// point or a complex type (based on typeDomain/typeSize). 3329/// 'typeDomain' is a real floating point or complex type. 3330/// 'typeSize' is a real floating point or complex type. 3331QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 3332 QualType Domain) const { 3333 FloatingRank EltRank = getFloatingRank(Size); 3334 if (Domain->isComplexType()) { 3335 switch (EltRank) { 3336 default: assert(0 && "getFloatingRank(): illegal value for rank"); 3337 case FloatRank: return FloatComplexTy; 3338 case DoubleRank: return DoubleComplexTy; 3339 case LongDoubleRank: return LongDoubleComplexTy; 3340 } 3341 } 3342 3343 assert(Domain->isRealFloatingType() && "Unknown domain!"); 3344 switch (EltRank) { 3345 default: assert(0 && "getFloatingRank(): illegal value for rank"); 3346 case FloatRank: return FloatTy; 3347 case DoubleRank: return DoubleTy; 3348 case LongDoubleRank: return LongDoubleTy; 3349 } 3350} 3351 3352/// getFloatingTypeOrder - Compare the rank of the two specified floating 3353/// point types, ignoring the domain of the type (i.e. 'double' == 3354/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 3355/// LHS < RHS, return -1. 3356int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) const { 3357 FloatingRank LHSR = getFloatingRank(LHS); 3358 FloatingRank RHSR = getFloatingRank(RHS); 3359 3360 if (LHSR == RHSR) 3361 return 0; 3362 if (LHSR > RHSR) 3363 return 1; 3364 return -1; 3365} 3366 3367/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 3368/// routine will assert if passed a built-in type that isn't an integer or enum, 3369/// or if it is not canonicalized. 3370unsigned ASTContext::getIntegerRank(const Type *T) const { 3371 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 3372 if (const EnumType* ET = dyn_cast<EnumType>(T)) 3373 T = ET->getDecl()->getPromotionType().getTypePtr(); 3374 3375 if (T->isSpecificBuiltinType(BuiltinType::WChar_S) || 3376 T->isSpecificBuiltinType(BuiltinType::WChar_U)) 3377 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 3378 3379 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 3380 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 3381 3382 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 3383 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 3384 3385 switch (cast<BuiltinType>(T)->getKind()) { 3386 default: assert(0 && "getIntegerRank(): not a built-in integer"); 3387 case BuiltinType::Bool: 3388 return 1 + (getIntWidth(BoolTy) << 3); 3389 case BuiltinType::Char_S: 3390 case BuiltinType::Char_U: 3391 case BuiltinType::SChar: 3392 case BuiltinType::UChar: 3393 return 2 + (getIntWidth(CharTy) << 3); 3394 case BuiltinType::Short: 3395 case BuiltinType::UShort: 3396 return 3 + (getIntWidth(ShortTy) << 3); 3397 case BuiltinType::Int: 3398 case BuiltinType::UInt: 3399 return 4 + (getIntWidth(IntTy) << 3); 3400 case BuiltinType::Long: 3401 case BuiltinType::ULong: 3402 return 5 + (getIntWidth(LongTy) << 3); 3403 case BuiltinType::LongLong: 3404 case BuiltinType::ULongLong: 3405 return 6 + (getIntWidth(LongLongTy) << 3); 3406 case BuiltinType::Int128: 3407 case BuiltinType::UInt128: 3408 return 7 + (getIntWidth(Int128Ty) << 3); 3409 } 3410} 3411 3412/// \brief Whether this is a promotable bitfield reference according 3413/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 3414/// 3415/// \returns the type this bit-field will promote to, or NULL if no 3416/// promotion occurs. 3417QualType ASTContext::isPromotableBitField(Expr *E) const { 3418 if (E->isTypeDependent() || E->isValueDependent()) 3419 return QualType(); 3420 3421 FieldDecl *Field = E->getBitField(); 3422 if (!Field) 3423 return QualType(); 3424 3425 QualType FT = Field->getType(); 3426 3427 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 3428 uint64_t BitWidth = BitWidthAP.getZExtValue(); 3429 uint64_t IntSize = getTypeSize(IntTy); 3430 // GCC extension compatibility: if the bit-field size is less than or equal 3431 // to the size of int, it gets promoted no matter what its type is. 3432 // For instance, unsigned long bf : 4 gets promoted to signed int. 3433 if (BitWidth < IntSize) 3434 return IntTy; 3435 3436 if (BitWidth == IntSize) 3437 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 3438 3439 // Types bigger than int are not subject to promotions, and therefore act 3440 // like the base type. 3441 // FIXME: This doesn't quite match what gcc does, but what gcc does here 3442 // is ridiculous. 3443 return QualType(); 3444} 3445 3446/// getPromotedIntegerType - Returns the type that Promotable will 3447/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 3448/// integer type. 3449QualType ASTContext::getPromotedIntegerType(QualType Promotable) const { 3450 assert(!Promotable.isNull()); 3451 assert(Promotable->isPromotableIntegerType()); 3452 if (const EnumType *ET = Promotable->getAs<EnumType>()) 3453 return ET->getDecl()->getPromotionType(); 3454 if (Promotable->isSignedIntegerType()) 3455 return IntTy; 3456 uint64_t PromotableSize = getTypeSize(Promotable); 3457 uint64_t IntSize = getTypeSize(IntTy); 3458 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 3459 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 3460} 3461 3462/// getIntegerTypeOrder - Returns the highest ranked integer type: 3463/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 3464/// LHS < RHS, return -1. 3465int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) const { 3466 const Type *LHSC = getCanonicalType(LHS).getTypePtr(); 3467 const Type *RHSC = getCanonicalType(RHS).getTypePtr(); 3468 if (LHSC == RHSC) return 0; 3469 3470 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 3471 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 3472 3473 unsigned LHSRank = getIntegerRank(LHSC); 3474 unsigned RHSRank = getIntegerRank(RHSC); 3475 3476 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 3477 if (LHSRank == RHSRank) return 0; 3478 return LHSRank > RHSRank ? 1 : -1; 3479 } 3480 3481 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 3482 if (LHSUnsigned) { 3483 // If the unsigned [LHS] type is larger, return it. 3484 if (LHSRank >= RHSRank) 3485 return 1; 3486 3487 // If the signed type can represent all values of the unsigned type, it 3488 // wins. Because we are dealing with 2's complement and types that are 3489 // powers of two larger than each other, this is always safe. 3490 return -1; 3491 } 3492 3493 // If the unsigned [RHS] type is larger, return it. 3494 if (RHSRank >= LHSRank) 3495 return -1; 3496 3497 // If the signed type can represent all values of the unsigned type, it 3498 // wins. Because we are dealing with 2's complement and types that are 3499 // powers of two larger than each other, this is always safe. 3500 return 1; 3501} 3502 3503static RecordDecl * 3504CreateRecordDecl(const ASTContext &Ctx, RecordDecl::TagKind TK, 3505 DeclContext *DC, IdentifierInfo *Id) { 3506 SourceLocation Loc; 3507 if (Ctx.getLangOptions().CPlusPlus) 3508 return CXXRecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 3509 else 3510 return RecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 3511} 3512 3513// getCFConstantStringType - Return the type used for constant CFStrings. 3514QualType ASTContext::getCFConstantStringType() const { 3515 if (!CFConstantStringTypeDecl) { 3516 CFConstantStringTypeDecl = 3517 CreateRecordDecl(*this, TTK_Struct, TUDecl, 3518 &Idents.get("NSConstantString")); 3519 CFConstantStringTypeDecl->startDefinition(); 3520 3521 QualType FieldTypes[4]; 3522 3523 // const int *isa; 3524 FieldTypes[0] = getPointerType(IntTy.withConst()); 3525 // int flags; 3526 FieldTypes[1] = IntTy; 3527 // const char *str; 3528 FieldTypes[2] = getPointerType(CharTy.withConst()); 3529 // long length; 3530 FieldTypes[3] = LongTy; 3531 3532 // Create fields 3533 for (unsigned i = 0; i < 4; ++i) { 3534 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 3535 SourceLocation(), 3536 SourceLocation(), 0, 3537 FieldTypes[i], /*TInfo=*/0, 3538 /*BitWidth=*/0, 3539 /*Mutable=*/false); 3540 Field->setAccess(AS_public); 3541 CFConstantStringTypeDecl->addDecl(Field); 3542 } 3543 3544 CFConstantStringTypeDecl->completeDefinition(); 3545 } 3546 3547 return getTagDeclType(CFConstantStringTypeDecl); 3548} 3549 3550void ASTContext::setCFConstantStringType(QualType T) { 3551 const RecordType *Rec = T->getAs<RecordType>(); 3552 assert(Rec && "Invalid CFConstantStringType"); 3553 CFConstantStringTypeDecl = Rec->getDecl(); 3554} 3555 3556// getNSConstantStringType - Return the type used for constant NSStrings. 3557QualType ASTContext::getNSConstantStringType() const { 3558 if (!NSConstantStringTypeDecl) { 3559 NSConstantStringTypeDecl = 3560 CreateRecordDecl(*this, TTK_Struct, TUDecl, 3561 &Idents.get("__builtin_NSString")); 3562 NSConstantStringTypeDecl->startDefinition(); 3563 3564 QualType FieldTypes[3]; 3565 3566 // const int *isa; 3567 FieldTypes[0] = getPointerType(IntTy.withConst()); 3568 // const char *str; 3569 FieldTypes[1] = getPointerType(CharTy.withConst()); 3570 // unsigned int length; 3571 FieldTypes[2] = UnsignedIntTy; 3572 3573 // Create fields 3574 for (unsigned i = 0; i < 3; ++i) { 3575 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 3576 SourceLocation(), 3577 SourceLocation(), 0, 3578 FieldTypes[i], /*TInfo=*/0, 3579 /*BitWidth=*/0, 3580 /*Mutable=*/false); 3581 Field->setAccess(AS_public); 3582 NSConstantStringTypeDecl->addDecl(Field); 3583 } 3584 3585 NSConstantStringTypeDecl->completeDefinition(); 3586 } 3587 3588 return getTagDeclType(NSConstantStringTypeDecl); 3589} 3590 3591void ASTContext::setNSConstantStringType(QualType T) { 3592 const RecordType *Rec = T->getAs<RecordType>(); 3593 assert(Rec && "Invalid NSConstantStringType"); 3594 NSConstantStringTypeDecl = Rec->getDecl(); 3595} 3596 3597QualType ASTContext::getObjCFastEnumerationStateType() const { 3598 if (!ObjCFastEnumerationStateTypeDecl) { 3599 ObjCFastEnumerationStateTypeDecl = 3600 CreateRecordDecl(*this, TTK_Struct, TUDecl, 3601 &Idents.get("__objcFastEnumerationState")); 3602 ObjCFastEnumerationStateTypeDecl->startDefinition(); 3603 3604 QualType FieldTypes[] = { 3605 UnsignedLongTy, 3606 getPointerType(ObjCIdTypedefType), 3607 getPointerType(UnsignedLongTy), 3608 getConstantArrayType(UnsignedLongTy, 3609 llvm::APInt(32, 5), ArrayType::Normal, 0) 3610 }; 3611 3612 for (size_t i = 0; i < 4; ++i) { 3613 FieldDecl *Field = FieldDecl::Create(*this, 3614 ObjCFastEnumerationStateTypeDecl, 3615 SourceLocation(), 3616 SourceLocation(), 0, 3617 FieldTypes[i], /*TInfo=*/0, 3618 /*BitWidth=*/0, 3619 /*Mutable=*/false); 3620 Field->setAccess(AS_public); 3621 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 3622 } 3623 3624 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 3625 } 3626 3627 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 3628} 3629 3630QualType ASTContext::getBlockDescriptorType() const { 3631 if (BlockDescriptorType) 3632 return getTagDeclType(BlockDescriptorType); 3633 3634 RecordDecl *T; 3635 // FIXME: Needs the FlagAppleBlock bit. 3636 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 3637 &Idents.get("__block_descriptor")); 3638 T->startDefinition(); 3639 3640 QualType FieldTypes[] = { 3641 UnsignedLongTy, 3642 UnsignedLongTy, 3643 }; 3644 3645 const char *FieldNames[] = { 3646 "reserved", 3647 "Size" 3648 }; 3649 3650 for (size_t i = 0; i < 2; ++i) { 3651 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3652 SourceLocation(), 3653 &Idents.get(FieldNames[i]), 3654 FieldTypes[i], /*TInfo=*/0, 3655 /*BitWidth=*/0, 3656 /*Mutable=*/false); 3657 Field->setAccess(AS_public); 3658 T->addDecl(Field); 3659 } 3660 3661 T->completeDefinition(); 3662 3663 BlockDescriptorType = T; 3664 3665 return getTagDeclType(BlockDescriptorType); 3666} 3667 3668void ASTContext::setBlockDescriptorType(QualType T) { 3669 const RecordType *Rec = T->getAs<RecordType>(); 3670 assert(Rec && "Invalid BlockDescriptorType"); 3671 BlockDescriptorType = Rec->getDecl(); 3672} 3673 3674QualType ASTContext::getBlockDescriptorExtendedType() const { 3675 if (BlockDescriptorExtendedType) 3676 return getTagDeclType(BlockDescriptorExtendedType); 3677 3678 RecordDecl *T; 3679 // FIXME: Needs the FlagAppleBlock bit. 3680 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 3681 &Idents.get("__block_descriptor_withcopydispose")); 3682 T->startDefinition(); 3683 3684 QualType FieldTypes[] = { 3685 UnsignedLongTy, 3686 UnsignedLongTy, 3687 getPointerType(VoidPtrTy), 3688 getPointerType(VoidPtrTy) 3689 }; 3690 3691 const char *FieldNames[] = { 3692 "reserved", 3693 "Size", 3694 "CopyFuncPtr", 3695 "DestroyFuncPtr" 3696 }; 3697 3698 for (size_t i = 0; i < 4; ++i) { 3699 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3700 SourceLocation(), 3701 &Idents.get(FieldNames[i]), 3702 FieldTypes[i], /*TInfo=*/0, 3703 /*BitWidth=*/0, 3704 /*Mutable=*/false); 3705 Field->setAccess(AS_public); 3706 T->addDecl(Field); 3707 } 3708 3709 T->completeDefinition(); 3710 3711 BlockDescriptorExtendedType = T; 3712 3713 return getTagDeclType(BlockDescriptorExtendedType); 3714} 3715 3716void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3717 const RecordType *Rec = T->getAs<RecordType>(); 3718 assert(Rec && "Invalid BlockDescriptorType"); 3719 BlockDescriptorExtendedType = Rec->getDecl(); 3720} 3721 3722bool ASTContext::BlockRequiresCopying(QualType Ty) const { 3723 if (Ty->isBlockPointerType()) 3724 return true; 3725 if (isObjCNSObjectType(Ty)) 3726 return true; 3727 if (Ty->isObjCObjectPointerType()) 3728 return true; 3729 if (getLangOptions().CPlusPlus) { 3730 if (const RecordType *RT = Ty->getAs<RecordType>()) { 3731 CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 3732 return RD->hasConstCopyConstructor(); 3733 3734 } 3735 } 3736 return false; 3737} 3738 3739QualType 3740ASTContext::BuildByRefType(llvm::StringRef DeclName, QualType Ty) const { 3741 // type = struct __Block_byref_1_X { 3742 // void *__isa; 3743 // struct __Block_byref_1_X *__forwarding; 3744 // unsigned int __flags; 3745 // unsigned int __size; 3746 // void *__copy_helper; // as needed 3747 // void *__destroy_help // as needed 3748 // int X; 3749 // } * 3750 3751 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3752 3753 // FIXME: Move up 3754 llvm::SmallString<36> Name; 3755 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3756 ++UniqueBlockByRefTypeID << '_' << DeclName; 3757 RecordDecl *T; 3758 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, &Idents.get(Name.str())); 3759 T->startDefinition(); 3760 QualType Int32Ty = IntTy; 3761 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3762 QualType FieldTypes[] = { 3763 getPointerType(VoidPtrTy), 3764 getPointerType(getTagDeclType(T)), 3765 Int32Ty, 3766 Int32Ty, 3767 getPointerType(VoidPtrTy), 3768 getPointerType(VoidPtrTy), 3769 Ty 3770 }; 3771 3772 llvm::StringRef FieldNames[] = { 3773 "__isa", 3774 "__forwarding", 3775 "__flags", 3776 "__size", 3777 "__copy_helper", 3778 "__destroy_helper", 3779 DeclName, 3780 }; 3781 3782 for (size_t i = 0; i < 7; ++i) { 3783 if (!HasCopyAndDispose && i >=4 && i <= 5) 3784 continue; 3785 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3786 SourceLocation(), 3787 &Idents.get(FieldNames[i]), 3788 FieldTypes[i], /*TInfo=*/0, 3789 /*BitWidth=*/0, /*Mutable=*/false); 3790 Field->setAccess(AS_public); 3791 T->addDecl(Field); 3792 } 3793 3794 T->completeDefinition(); 3795 3796 return getPointerType(getTagDeclType(T)); 3797} 3798 3799void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3800 const RecordType *Rec = T->getAs<RecordType>(); 3801 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3802 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3803} 3804 3805// This returns true if a type has been typedefed to BOOL: 3806// typedef <type> BOOL; 3807static bool isTypeTypedefedAsBOOL(QualType T) { 3808 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3809 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3810 return II->isStr("BOOL"); 3811 3812 return false; 3813} 3814 3815/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3816/// purpose. 3817CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) const { 3818 if (!type->isIncompleteArrayType() && type->isIncompleteType()) 3819 return CharUnits::Zero(); 3820 3821 CharUnits sz = getTypeSizeInChars(type); 3822 3823 // Make all integer and enum types at least as large as an int 3824 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 3825 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3826 // Treat arrays as pointers, since that's how they're passed in. 3827 else if (type->isArrayType()) 3828 sz = getTypeSizeInChars(VoidPtrTy); 3829 return sz; 3830} 3831 3832static inline 3833std::string charUnitsToString(const CharUnits &CU) { 3834 return llvm::itostr(CU.getQuantity()); 3835} 3836 3837/// getObjCEncodingForBlock - Return the encoded type for this block 3838/// declaration. 3839std::string ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr) const { 3840 std::string S; 3841 3842 const BlockDecl *Decl = Expr->getBlockDecl(); 3843 QualType BlockTy = 3844 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3845 // Encode result type. 3846 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3847 // Compute size of all parameters. 3848 // Start with computing size of a pointer in number of bytes. 3849 // FIXME: There might(should) be a better way of doing this computation! 3850 SourceLocation Loc; 3851 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3852 CharUnits ParmOffset = PtrSize; 3853 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3854 E = Decl->param_end(); PI != E; ++PI) { 3855 QualType PType = (*PI)->getType(); 3856 CharUnits sz = getObjCEncodingTypeSize(PType); 3857 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3858 ParmOffset += sz; 3859 } 3860 // Size of the argument frame 3861 S += charUnitsToString(ParmOffset); 3862 // Block pointer and offset. 3863 S += "@?0"; 3864 ParmOffset = PtrSize; 3865 3866 // Argument types. 3867 ParmOffset = PtrSize; 3868 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3869 Decl->param_end(); PI != E; ++PI) { 3870 ParmVarDecl *PVDecl = *PI; 3871 QualType PType = PVDecl->getOriginalType(); 3872 if (const ArrayType *AT = 3873 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3874 // Use array's original type only if it has known number of 3875 // elements. 3876 if (!isa<ConstantArrayType>(AT)) 3877 PType = PVDecl->getType(); 3878 } else if (PType->isFunctionType()) 3879 PType = PVDecl->getType(); 3880 getObjCEncodingForType(PType, S); 3881 S += charUnitsToString(ParmOffset); 3882 ParmOffset += getObjCEncodingTypeSize(PType); 3883 } 3884 3885 return S; 3886} 3887 3888bool ASTContext::getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, 3889 std::string& S) { 3890 // Encode result type. 3891 getObjCEncodingForType(Decl->getResultType(), S); 3892 CharUnits ParmOffset; 3893 // Compute size of all parameters. 3894 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 3895 E = Decl->param_end(); PI != E; ++PI) { 3896 QualType PType = (*PI)->getType(); 3897 CharUnits sz = getObjCEncodingTypeSize(PType); 3898 if (sz.isZero()) 3899 return true; 3900 3901 assert (sz.isPositive() && 3902 "getObjCEncodingForFunctionDecl - Incomplete param type"); 3903 ParmOffset += sz; 3904 } 3905 S += charUnitsToString(ParmOffset); 3906 ParmOffset = CharUnits::Zero(); 3907 3908 // Argument types. 3909 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 3910 E = Decl->param_end(); PI != E; ++PI) { 3911 ParmVarDecl *PVDecl = *PI; 3912 QualType PType = PVDecl->getOriginalType(); 3913 if (const ArrayType *AT = 3914 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3915 // Use array's original type only if it has known number of 3916 // elements. 3917 if (!isa<ConstantArrayType>(AT)) 3918 PType = PVDecl->getType(); 3919 } else if (PType->isFunctionType()) 3920 PType = PVDecl->getType(); 3921 getObjCEncodingForType(PType, S); 3922 S += charUnitsToString(ParmOffset); 3923 ParmOffset += getObjCEncodingTypeSize(PType); 3924 } 3925 3926 return false; 3927} 3928 3929/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3930/// declaration. 3931bool ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3932 std::string& S) const { 3933 // FIXME: This is not very efficient. 3934 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3935 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3936 // Encode result type. 3937 getObjCEncodingForType(Decl->getResultType(), S); 3938 // Compute size of all parameters. 3939 // Start with computing size of a pointer in number of bytes. 3940 // FIXME: There might(should) be a better way of doing this computation! 3941 SourceLocation Loc; 3942 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3943 // The first two arguments (self and _cmd) are pointers; account for 3944 // their size. 3945 CharUnits ParmOffset = 2 * PtrSize; 3946 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3947 E = Decl->sel_param_end(); PI != E; ++PI) { 3948 QualType PType = (*PI)->getType(); 3949 CharUnits sz = getObjCEncodingTypeSize(PType); 3950 if (sz.isZero()) 3951 return true; 3952 3953 assert (sz.isPositive() && 3954 "getObjCEncodingForMethodDecl - Incomplete param type"); 3955 ParmOffset += sz; 3956 } 3957 S += charUnitsToString(ParmOffset); 3958 S += "@0:"; 3959 S += charUnitsToString(PtrSize); 3960 3961 // Argument types. 3962 ParmOffset = 2 * PtrSize; 3963 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3964 E = Decl->sel_param_end(); PI != E; ++PI) { 3965 ParmVarDecl *PVDecl = *PI; 3966 QualType PType = PVDecl->getOriginalType(); 3967 if (const ArrayType *AT = 3968 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3969 // Use array's original type only if it has known number of 3970 // elements. 3971 if (!isa<ConstantArrayType>(AT)) 3972 PType = PVDecl->getType(); 3973 } else if (PType->isFunctionType()) 3974 PType = PVDecl->getType(); 3975 // Process argument qualifiers for user supplied arguments; such as, 3976 // 'in', 'inout', etc. 3977 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3978 getObjCEncodingForType(PType, S); 3979 S += charUnitsToString(ParmOffset); 3980 ParmOffset += getObjCEncodingTypeSize(PType); 3981 } 3982 3983 return false; 3984} 3985 3986/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3987/// property declaration. If non-NULL, Container must be either an 3988/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3989/// NULL when getting encodings for protocol properties. 3990/// Property attributes are stored as a comma-delimited C string. The simple 3991/// attributes readonly and bycopy are encoded as single characters. The 3992/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3993/// encoded as single characters, followed by an identifier. Property types 3994/// are also encoded as a parametrized attribute. The characters used to encode 3995/// these attributes are defined by the following enumeration: 3996/// @code 3997/// enum PropertyAttributes { 3998/// kPropertyReadOnly = 'R', // property is read-only. 3999/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 4000/// kPropertyByref = '&', // property is a reference to the value last assigned 4001/// kPropertyDynamic = 'D', // property is dynamic 4002/// kPropertyGetter = 'G', // followed by getter selector name 4003/// kPropertySetter = 'S', // followed by setter selector name 4004/// kPropertyInstanceVariable = 'V' // followed by instance variable name 4005/// kPropertyType = 't' // followed by old-style type encoding. 4006/// kPropertyWeak = 'W' // 'weak' property 4007/// kPropertyStrong = 'P' // property GC'able 4008/// kPropertyNonAtomic = 'N' // property non-atomic 4009/// }; 4010/// @endcode 4011void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 4012 const Decl *Container, 4013 std::string& S) const { 4014 // Collect information from the property implementation decl(s). 4015 bool Dynamic = false; 4016 ObjCPropertyImplDecl *SynthesizePID = 0; 4017 4018 // FIXME: Duplicated code due to poor abstraction. 4019 if (Container) { 4020 if (const ObjCCategoryImplDecl *CID = 4021 dyn_cast<ObjCCategoryImplDecl>(Container)) { 4022 for (ObjCCategoryImplDecl::propimpl_iterator 4023 i = CID->propimpl_begin(), e = CID->propimpl_end(); 4024 i != e; ++i) { 4025 ObjCPropertyImplDecl *PID = *i; 4026 if (PID->getPropertyDecl() == PD) { 4027 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 4028 Dynamic = true; 4029 } else { 4030 SynthesizePID = PID; 4031 } 4032 } 4033 } 4034 } else { 4035 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 4036 for (ObjCCategoryImplDecl::propimpl_iterator 4037 i = OID->propimpl_begin(), e = OID->propimpl_end(); 4038 i != e; ++i) { 4039 ObjCPropertyImplDecl *PID = *i; 4040 if (PID->getPropertyDecl() == PD) { 4041 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 4042 Dynamic = true; 4043 } else { 4044 SynthesizePID = PID; 4045 } 4046 } 4047 } 4048 } 4049 } 4050 4051 // FIXME: This is not very efficient. 4052 S = "T"; 4053 4054 // Encode result type. 4055 // GCC has some special rules regarding encoding of properties which 4056 // closely resembles encoding of ivars. 4057 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 4058 true /* outermost type */, 4059 true /* encoding for property */); 4060 4061 if (PD->isReadOnly()) { 4062 S += ",R"; 4063 } else { 4064 switch (PD->getSetterKind()) { 4065 case ObjCPropertyDecl::Assign: break; 4066 case ObjCPropertyDecl::Copy: S += ",C"; break; 4067 case ObjCPropertyDecl::Retain: S += ",&"; break; 4068 } 4069 } 4070 4071 // It really isn't clear at all what this means, since properties 4072 // are "dynamic by default". 4073 if (Dynamic) 4074 S += ",D"; 4075 4076 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 4077 S += ",N"; 4078 4079 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 4080 S += ",G"; 4081 S += PD->getGetterName().getAsString(); 4082 } 4083 4084 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 4085 S += ",S"; 4086 S += PD->getSetterName().getAsString(); 4087 } 4088 4089 if (SynthesizePID) { 4090 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 4091 S += ",V"; 4092 S += OID->getNameAsString(); 4093 } 4094 4095 // FIXME: OBJCGC: weak & strong 4096} 4097 4098/// getLegacyIntegralTypeEncoding - 4099/// Another legacy compatibility encoding: 32-bit longs are encoded as 4100/// 'l' or 'L' , but not always. For typedefs, we need to use 4101/// 'i' or 'I' instead if encoding a struct field, or a pointer! 4102/// 4103void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 4104 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 4105 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 4106 if (BT->getKind() == BuiltinType::ULong && getIntWidth(PointeeTy) == 32) 4107 PointeeTy = UnsignedIntTy; 4108 else 4109 if (BT->getKind() == BuiltinType::Long && getIntWidth(PointeeTy) == 32) 4110 PointeeTy = IntTy; 4111 } 4112 } 4113} 4114 4115void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 4116 const FieldDecl *Field) const { 4117 // We follow the behavior of gcc, expanding structures which are 4118 // directly pointed to, and expanding embedded structures. Note that 4119 // these rules are sufficient to prevent recursive encoding of the 4120 // same type. 4121 getObjCEncodingForTypeImpl(T, S, true, true, Field, 4122 true /* outermost type */); 4123} 4124 4125static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 4126 switch (T->getAs<BuiltinType>()->getKind()) { 4127 default: assert(0 && "Unhandled builtin type kind"); 4128 case BuiltinType::Void: return 'v'; 4129 case BuiltinType::Bool: return 'B'; 4130 case BuiltinType::Char_U: 4131 case BuiltinType::UChar: return 'C'; 4132 case BuiltinType::UShort: return 'S'; 4133 case BuiltinType::UInt: return 'I'; 4134 case BuiltinType::ULong: 4135 return C->getIntWidth(T) == 32 ? 'L' : 'Q'; 4136 case BuiltinType::UInt128: return 'T'; 4137 case BuiltinType::ULongLong: return 'Q'; 4138 case BuiltinType::Char_S: 4139 case BuiltinType::SChar: return 'c'; 4140 case BuiltinType::Short: return 's'; 4141 case BuiltinType::WChar_S: 4142 case BuiltinType::WChar_U: 4143 case BuiltinType::Int: return 'i'; 4144 case BuiltinType::Long: 4145 return C->getIntWidth(T) == 32 ? 'l' : 'q'; 4146 case BuiltinType::LongLong: return 'q'; 4147 case BuiltinType::Int128: return 't'; 4148 case BuiltinType::Float: return 'f'; 4149 case BuiltinType::Double: return 'd'; 4150 case BuiltinType::LongDouble: return 'D'; 4151 } 4152} 4153 4154static void EncodeBitField(const ASTContext *Ctx, std::string& S, 4155 QualType T, const FieldDecl *FD) { 4156 const Expr *E = FD->getBitWidth(); 4157 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 4158 S += 'b'; 4159 // The NeXT runtime encodes bit fields as b followed by the number of bits. 4160 // The GNU runtime requires more information; bitfields are encoded as b, 4161 // then the offset (in bits) of the first element, then the type of the 4162 // bitfield, then the size in bits. For example, in this structure: 4163 // 4164 // struct 4165 // { 4166 // int integer; 4167 // int flags:2; 4168 // }; 4169 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 4170 // runtime, but b32i2 for the GNU runtime. The reason for this extra 4171 // information is not especially sensible, but we're stuck with it for 4172 // compatibility with GCC, although providing it breaks anything that 4173 // actually uses runtime introspection and wants to work on both runtimes... 4174 if (!Ctx->getLangOptions().NeXTRuntime) { 4175 const RecordDecl *RD = FD->getParent(); 4176 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 4177 // FIXME: This same linear search is also used in ExprConstant - it might 4178 // be better if the FieldDecl stored its offset. We'd be increasing the 4179 // size of the object slightly, but saving some time every time it is used. 4180 unsigned i = 0; 4181 for (RecordDecl::field_iterator Field = RD->field_begin(), 4182 FieldEnd = RD->field_end(); 4183 Field != FieldEnd; (void)++Field, ++i) { 4184 if (*Field == FD) 4185 break; 4186 } 4187 S += llvm::utostr(RL.getFieldOffset(i)); 4188 if (T->isEnumeralType()) 4189 S += 'i'; 4190 else 4191 S += ObjCEncodingForPrimitiveKind(Ctx, T); 4192 } 4193 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 4194 S += llvm::utostr(N); 4195} 4196 4197// FIXME: Use SmallString for accumulating string. 4198void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 4199 bool ExpandPointedToStructures, 4200 bool ExpandStructures, 4201 const FieldDecl *FD, 4202 bool OutermostType, 4203 bool EncodingProperty, 4204 bool StructField) const { 4205 if (T->getAs<BuiltinType>()) { 4206 if (FD && FD->isBitField()) 4207 return EncodeBitField(this, S, T, FD); 4208 S += ObjCEncodingForPrimitiveKind(this, T); 4209 return; 4210 } 4211 4212 if (const ComplexType *CT = T->getAs<ComplexType>()) { 4213 S += 'j'; 4214 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 4215 false); 4216 return; 4217 } 4218 4219 // encoding for pointer or r3eference types. 4220 QualType PointeeTy; 4221 if (const PointerType *PT = T->getAs<PointerType>()) { 4222 if (PT->isObjCSelType()) { 4223 S += ':'; 4224 return; 4225 } 4226 PointeeTy = PT->getPointeeType(); 4227 } 4228 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 4229 PointeeTy = RT->getPointeeType(); 4230 if (!PointeeTy.isNull()) { 4231 bool isReadOnly = false; 4232 // For historical/compatibility reasons, the read-only qualifier of the 4233 // pointee gets emitted _before_ the '^'. The read-only qualifier of 4234 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 4235 // Also, do not emit the 'r' for anything but the outermost type! 4236 if (isa<TypedefType>(T.getTypePtr())) { 4237 if (OutermostType && T.isConstQualified()) { 4238 isReadOnly = true; 4239 S += 'r'; 4240 } 4241 } else if (OutermostType) { 4242 QualType P = PointeeTy; 4243 while (P->getAs<PointerType>()) 4244 P = P->getAs<PointerType>()->getPointeeType(); 4245 if (P.isConstQualified()) { 4246 isReadOnly = true; 4247 S += 'r'; 4248 } 4249 } 4250 if (isReadOnly) { 4251 // Another legacy compatibility encoding. Some ObjC qualifier and type 4252 // combinations need to be rearranged. 4253 // Rewrite "in const" from "nr" to "rn" 4254 if (llvm::StringRef(S).endswith("nr")) 4255 S.replace(S.end()-2, S.end(), "rn"); 4256 } 4257 4258 if (PointeeTy->isCharType()) { 4259 // char pointer types should be encoded as '*' unless it is a 4260 // type that has been typedef'd to 'BOOL'. 4261 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 4262 S += '*'; 4263 return; 4264 } 4265 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 4266 // GCC binary compat: Need to convert "struct objc_class *" to "#". 4267 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 4268 S += '#'; 4269 return; 4270 } 4271 // GCC binary compat: Need to convert "struct objc_object *" to "@". 4272 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 4273 S += '@'; 4274 return; 4275 } 4276 // fall through... 4277 } 4278 S += '^'; 4279 getLegacyIntegralTypeEncoding(PointeeTy); 4280 4281 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 4282 NULL); 4283 return; 4284 } 4285 4286 if (const ArrayType *AT = 4287 // Ignore type qualifiers etc. 4288 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 4289 if (isa<IncompleteArrayType>(AT) && !StructField) { 4290 // Incomplete arrays are encoded as a pointer to the array element. 4291 S += '^'; 4292 4293 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4294 false, ExpandStructures, FD); 4295 } else { 4296 S += '['; 4297 4298 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 4299 if (getTypeSize(CAT->getElementType()) == 0) 4300 S += '0'; 4301 else 4302 S += llvm::utostr(CAT->getSize().getZExtValue()); 4303 } else { 4304 //Variable length arrays are encoded as a regular array with 0 elements. 4305 assert((isa<VariableArrayType>(AT) || isa<IncompleteArrayType>(AT)) && 4306 "Unknown array type!"); 4307 S += '0'; 4308 } 4309 4310 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4311 false, ExpandStructures, FD); 4312 S += ']'; 4313 } 4314 return; 4315 } 4316 4317 if (T->getAs<FunctionType>()) { 4318 S += '?'; 4319 return; 4320 } 4321 4322 if (const RecordType *RTy = T->getAs<RecordType>()) { 4323 RecordDecl *RDecl = RTy->getDecl(); 4324 S += RDecl->isUnion() ? '(' : '{'; 4325 // Anonymous structures print as '?' 4326 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 4327 S += II->getName(); 4328 if (ClassTemplateSpecializationDecl *Spec 4329 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 4330 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 4331 std::string TemplateArgsStr 4332 = TemplateSpecializationType::PrintTemplateArgumentList( 4333 TemplateArgs.data(), 4334 TemplateArgs.size(), 4335 (*this).PrintingPolicy); 4336 4337 S += TemplateArgsStr; 4338 } 4339 } else { 4340 S += '?'; 4341 } 4342 if (ExpandStructures) { 4343 S += '='; 4344 if (!RDecl->isUnion()) { 4345 getObjCEncodingForStructureImpl(RDecl, S, FD); 4346 } else { 4347 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4348 FieldEnd = RDecl->field_end(); 4349 Field != FieldEnd; ++Field) { 4350 if (FD) { 4351 S += '"'; 4352 S += Field->getNameAsString(); 4353 S += '"'; 4354 } 4355 4356 // Special case bit-fields. 4357 if (Field->isBitField()) { 4358 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 4359 (*Field)); 4360 } else { 4361 QualType qt = Field->getType(); 4362 getLegacyIntegralTypeEncoding(qt); 4363 getObjCEncodingForTypeImpl(qt, S, false, true, 4364 FD, /*OutermostType*/false, 4365 /*EncodingProperty*/false, 4366 /*StructField*/true); 4367 } 4368 } 4369 } 4370 } 4371 S += RDecl->isUnion() ? ')' : '}'; 4372 return; 4373 } 4374 4375 if (T->isEnumeralType()) { 4376 if (FD && FD->isBitField()) 4377 EncodeBitField(this, S, T, FD); 4378 else 4379 S += 'i'; 4380 return; 4381 } 4382 4383 if (T->isBlockPointerType()) { 4384 S += "@?"; // Unlike a pointer-to-function, which is "^?". 4385 return; 4386 } 4387 4388 // Ignore protocol qualifiers when mangling at this level. 4389 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 4390 T = OT->getBaseType(); 4391 4392 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 4393 // @encode(class_name) 4394 ObjCInterfaceDecl *OI = OIT->getDecl(); 4395 S += '{'; 4396 const IdentifierInfo *II = OI->getIdentifier(); 4397 S += II->getName(); 4398 S += '='; 4399 llvm::SmallVector<ObjCIvarDecl*, 32> Ivars; 4400 DeepCollectObjCIvars(OI, true, Ivars); 4401 for (unsigned i = 0, e = Ivars.size(); i != e; ++i) { 4402 FieldDecl *Field = cast<FieldDecl>(Ivars[i]); 4403 if (Field->isBitField()) 4404 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, Field); 4405 else 4406 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, FD); 4407 } 4408 S += '}'; 4409 return; 4410 } 4411 4412 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 4413 if (OPT->isObjCIdType()) { 4414 S += '@'; 4415 return; 4416 } 4417 4418 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 4419 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 4420 // Since this is a binary compatibility issue, need to consult with runtime 4421 // folks. Fortunately, this is a *very* obsure construct. 4422 S += '#'; 4423 return; 4424 } 4425 4426 if (OPT->isObjCQualifiedIdType()) { 4427 getObjCEncodingForTypeImpl(getObjCIdType(), S, 4428 ExpandPointedToStructures, 4429 ExpandStructures, FD); 4430 if (FD || EncodingProperty) { 4431 // Note that we do extended encoding of protocol qualifer list 4432 // Only when doing ivar or property encoding. 4433 S += '"'; 4434 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4435 E = OPT->qual_end(); I != E; ++I) { 4436 S += '<'; 4437 S += (*I)->getNameAsString(); 4438 S += '>'; 4439 } 4440 S += '"'; 4441 } 4442 return; 4443 } 4444 4445 QualType PointeeTy = OPT->getPointeeType(); 4446 if (!EncodingProperty && 4447 isa<TypedefType>(PointeeTy.getTypePtr())) { 4448 // Another historical/compatibility reason. 4449 // We encode the underlying type which comes out as 4450 // {...}; 4451 S += '^'; 4452 getObjCEncodingForTypeImpl(PointeeTy, S, 4453 false, ExpandPointedToStructures, 4454 NULL); 4455 return; 4456 } 4457 4458 S += '@'; 4459 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 4460 S += '"'; 4461 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 4462 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4463 E = OPT->qual_end(); I != E; ++I) { 4464 S += '<'; 4465 S += (*I)->getNameAsString(); 4466 S += '>'; 4467 } 4468 S += '"'; 4469 } 4470 return; 4471 } 4472 4473 // gcc just blithely ignores member pointers. 4474 // TODO: maybe there should be a mangling for these 4475 if (T->getAs<MemberPointerType>()) 4476 return; 4477 4478 if (T->isVectorType()) { 4479 // This matches gcc's encoding, even though technically it is 4480 // insufficient. 4481 // FIXME. We should do a better job than gcc. 4482 return; 4483 } 4484 4485 assert(0 && "@encode for type not implemented!"); 4486} 4487 4488void ASTContext::getObjCEncodingForStructureImpl(RecordDecl *RDecl, 4489 std::string &S, 4490 const FieldDecl *FD, 4491 bool includeVBases) const { 4492 assert(RDecl && "Expected non-null RecordDecl"); 4493 assert(!RDecl->isUnion() && "Should not be called for unions"); 4494 if (!RDecl->getDefinition()) 4495 return; 4496 4497 CXXRecordDecl *CXXRec = dyn_cast<CXXRecordDecl>(RDecl); 4498 std::multimap<uint64_t, NamedDecl *> FieldOrBaseOffsets; 4499 const ASTRecordLayout &layout = getASTRecordLayout(RDecl); 4500 4501 if (CXXRec) { 4502 for (CXXRecordDecl::base_class_iterator 4503 BI = CXXRec->bases_begin(), 4504 BE = CXXRec->bases_end(); BI != BE; ++BI) { 4505 if (!BI->isVirtual()) { 4506 CXXRecordDecl *base = BI->getType()->getAsCXXRecordDecl(); 4507 uint64_t offs = layout.getBaseClassOffsetInBits(base); 4508 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4509 std::make_pair(offs, base)); 4510 } 4511 } 4512 } 4513 4514 unsigned i = 0; 4515 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4516 FieldEnd = RDecl->field_end(); 4517 Field != FieldEnd; ++Field, ++i) { 4518 uint64_t offs = layout.getFieldOffset(i); 4519 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4520 std::make_pair(offs, *Field)); 4521 } 4522 4523 if (CXXRec && includeVBases) { 4524 for (CXXRecordDecl::base_class_iterator 4525 BI = CXXRec->vbases_begin(), 4526 BE = CXXRec->vbases_end(); BI != BE; ++BI) { 4527 CXXRecordDecl *base = BI->getType()->getAsCXXRecordDecl(); 4528 uint64_t offs = layout.getVBaseClassOffsetInBits(base); 4529 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4530 std::make_pair(offs, base)); 4531 } 4532 } 4533 4534 CharUnits size; 4535 if (CXXRec) { 4536 size = includeVBases ? layout.getSize() : layout.getNonVirtualSize(); 4537 } else { 4538 size = layout.getSize(); 4539 } 4540 4541 uint64_t CurOffs = 0; 4542 std::multimap<uint64_t, NamedDecl *>::iterator 4543 CurLayObj = FieldOrBaseOffsets.begin(); 4544 4545 if (CurLayObj != FieldOrBaseOffsets.end() && CurLayObj->first != 0) { 4546 assert(CXXRec && CXXRec->isDynamicClass() && 4547 "Offset 0 was empty but no VTable ?"); 4548 if (FD) { 4549 S += "\"_vptr$"; 4550 std::string recname = CXXRec->getNameAsString(); 4551 if (recname.empty()) recname = "?"; 4552 S += recname; 4553 S += '"'; 4554 } 4555 S += "^^?"; 4556 CurOffs += getTypeSize(VoidPtrTy); 4557 } 4558 4559 if (!RDecl->hasFlexibleArrayMember()) { 4560 // Mark the end of the structure. 4561 uint64_t offs = toBits(size); 4562 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4563 std::make_pair(offs, (NamedDecl*)0)); 4564 } 4565 4566 for (; CurLayObj != FieldOrBaseOffsets.end(); ++CurLayObj) { 4567 assert(CurOffs <= CurLayObj->first); 4568 4569 if (CurOffs < CurLayObj->first) { 4570 uint64_t padding = CurLayObj->first - CurOffs; 4571 // FIXME: There doesn't seem to be a way to indicate in the encoding that 4572 // packing/alignment of members is different that normal, in which case 4573 // the encoding will be out-of-sync with the real layout. 4574 // If the runtime switches to just consider the size of types without 4575 // taking into account alignment, we could make padding explicit in the 4576 // encoding (e.g. using arrays of chars). The encoding strings would be 4577 // longer then though. 4578 CurOffs += padding; 4579 } 4580 4581 NamedDecl *dcl = CurLayObj->second; 4582 if (dcl == 0) 4583 break; // reached end of structure. 4584 4585 if (CXXRecordDecl *base = dyn_cast<CXXRecordDecl>(dcl)) { 4586 // We expand the bases without their virtual bases since those are going 4587 // in the initial structure. Note that this differs from gcc which 4588 // expands virtual bases each time one is encountered in the hierarchy, 4589 // making the encoding type bigger than it really is. 4590 getObjCEncodingForStructureImpl(base, S, FD, /*includeVBases*/false); 4591 if (!base->isEmpty()) 4592 CurOffs += toBits(getASTRecordLayout(base).getNonVirtualSize()); 4593 } else { 4594 FieldDecl *field = cast<FieldDecl>(dcl); 4595 if (FD) { 4596 S += '"'; 4597 S += field->getNameAsString(); 4598 S += '"'; 4599 } 4600 4601 if (field->isBitField()) { 4602 EncodeBitField(this, S, field->getType(), field); 4603 CurOffs += field->getBitWidth()->EvaluateAsInt(*this).getZExtValue(); 4604 } else { 4605 QualType qt = field->getType(); 4606 getLegacyIntegralTypeEncoding(qt); 4607 getObjCEncodingForTypeImpl(qt, S, false, true, FD, 4608 /*OutermostType*/false, 4609 /*EncodingProperty*/false, 4610 /*StructField*/true); 4611 CurOffs += getTypeSize(field->getType()); 4612 } 4613 } 4614 } 4615} 4616 4617void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 4618 std::string& S) const { 4619 if (QT & Decl::OBJC_TQ_In) 4620 S += 'n'; 4621 if (QT & Decl::OBJC_TQ_Inout) 4622 S += 'N'; 4623 if (QT & Decl::OBJC_TQ_Out) 4624 S += 'o'; 4625 if (QT & Decl::OBJC_TQ_Bycopy) 4626 S += 'O'; 4627 if (QT & Decl::OBJC_TQ_Byref) 4628 S += 'R'; 4629 if (QT & Decl::OBJC_TQ_Oneway) 4630 S += 'V'; 4631} 4632 4633void ASTContext::setBuiltinVaListType(QualType T) { 4634 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 4635 4636 BuiltinVaListType = T; 4637} 4638 4639void ASTContext::setObjCIdType(QualType T) { 4640 ObjCIdTypedefType = T; 4641} 4642 4643void ASTContext::setObjCSelType(QualType T) { 4644 ObjCSelTypedefType = T; 4645} 4646 4647void ASTContext::setObjCProtoType(QualType QT) { 4648 ObjCProtoType = QT; 4649} 4650 4651void ASTContext::setObjCClassType(QualType T) { 4652 ObjCClassTypedefType = T; 4653} 4654 4655void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 4656 assert(ObjCConstantStringType.isNull() && 4657 "'NSConstantString' type already set!"); 4658 4659 ObjCConstantStringType = getObjCInterfaceType(Decl); 4660} 4661 4662/// \brief Retrieve the template name that corresponds to a non-empty 4663/// lookup. 4664TemplateName 4665ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 4666 UnresolvedSetIterator End) const { 4667 unsigned size = End - Begin; 4668 assert(size > 1 && "set is not overloaded!"); 4669 4670 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 4671 size * sizeof(FunctionTemplateDecl*)); 4672 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 4673 4674 NamedDecl **Storage = OT->getStorage(); 4675 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 4676 NamedDecl *D = *I; 4677 assert(isa<FunctionTemplateDecl>(D) || 4678 (isa<UsingShadowDecl>(D) && 4679 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 4680 *Storage++ = D; 4681 } 4682 4683 return TemplateName(OT); 4684} 4685 4686/// \brief Retrieve the template name that represents a qualified 4687/// template name such as \c std::vector. 4688TemplateName 4689ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 4690 bool TemplateKeyword, 4691 TemplateDecl *Template) const { 4692 assert(NNS && "Missing nested-name-specifier in qualified template name"); 4693 4694 // FIXME: Canonicalization? 4695 llvm::FoldingSetNodeID ID; 4696 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 4697 4698 void *InsertPos = 0; 4699 QualifiedTemplateName *QTN = 4700 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4701 if (!QTN) { 4702 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 4703 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 4704 } 4705 4706 return TemplateName(QTN); 4707} 4708 4709/// \brief Retrieve the template name that represents a dependent 4710/// template name such as \c MetaFun::template apply. 4711TemplateName 4712ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4713 const IdentifierInfo *Name) const { 4714 assert((!NNS || NNS->isDependent()) && 4715 "Nested name specifier must be dependent"); 4716 4717 llvm::FoldingSetNodeID ID; 4718 DependentTemplateName::Profile(ID, NNS, Name); 4719 4720 void *InsertPos = 0; 4721 DependentTemplateName *QTN = 4722 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4723 4724 if (QTN) 4725 return TemplateName(QTN); 4726 4727 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4728 if (CanonNNS == NNS) { 4729 QTN = new (*this,4) DependentTemplateName(NNS, Name); 4730 } else { 4731 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 4732 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 4733 DependentTemplateName *CheckQTN = 4734 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4735 assert(!CheckQTN && "Dependent type name canonicalization broken"); 4736 (void)CheckQTN; 4737 } 4738 4739 DependentTemplateNames.InsertNode(QTN, InsertPos); 4740 return TemplateName(QTN); 4741} 4742 4743/// \brief Retrieve the template name that represents a dependent 4744/// template name such as \c MetaFun::template operator+. 4745TemplateName 4746ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4747 OverloadedOperatorKind Operator) const { 4748 assert((!NNS || NNS->isDependent()) && 4749 "Nested name specifier must be dependent"); 4750 4751 llvm::FoldingSetNodeID ID; 4752 DependentTemplateName::Profile(ID, NNS, Operator); 4753 4754 void *InsertPos = 0; 4755 DependentTemplateName *QTN 4756 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4757 4758 if (QTN) 4759 return TemplateName(QTN); 4760 4761 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4762 if (CanonNNS == NNS) { 4763 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 4764 } else { 4765 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 4766 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 4767 4768 DependentTemplateName *CheckQTN 4769 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4770 assert(!CheckQTN && "Dependent template name canonicalization broken"); 4771 (void)CheckQTN; 4772 } 4773 4774 DependentTemplateNames.InsertNode(QTN, InsertPos); 4775 return TemplateName(QTN); 4776} 4777 4778TemplateName 4779ASTContext::getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 4780 const TemplateArgument &ArgPack) const { 4781 ASTContext &Self = const_cast<ASTContext &>(*this); 4782 llvm::FoldingSetNodeID ID; 4783 SubstTemplateTemplateParmPackStorage::Profile(ID, Self, Param, ArgPack); 4784 4785 void *InsertPos = 0; 4786 SubstTemplateTemplateParmPackStorage *Subst 4787 = SubstTemplateTemplateParmPacks.FindNodeOrInsertPos(ID, InsertPos); 4788 4789 if (!Subst) { 4790 Subst = new (*this) SubstTemplateTemplateParmPackStorage(Self, Param, 4791 ArgPack.pack_size(), 4792 ArgPack.pack_begin()); 4793 SubstTemplateTemplateParmPacks.InsertNode(Subst, InsertPos); 4794 } 4795 4796 return TemplateName(Subst); 4797} 4798 4799/// getFromTargetType - Given one of the integer types provided by 4800/// TargetInfo, produce the corresponding type. The unsigned @p Type 4801/// is actually a value of type @c TargetInfo::IntType. 4802CanQualType ASTContext::getFromTargetType(unsigned Type) const { 4803 switch (Type) { 4804 case TargetInfo::NoInt: return CanQualType(); 4805 case TargetInfo::SignedShort: return ShortTy; 4806 case TargetInfo::UnsignedShort: return UnsignedShortTy; 4807 case TargetInfo::SignedInt: return IntTy; 4808 case TargetInfo::UnsignedInt: return UnsignedIntTy; 4809 case TargetInfo::SignedLong: return LongTy; 4810 case TargetInfo::UnsignedLong: return UnsignedLongTy; 4811 case TargetInfo::SignedLongLong: return LongLongTy; 4812 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 4813 } 4814 4815 assert(false && "Unhandled TargetInfo::IntType value"); 4816 return CanQualType(); 4817} 4818 4819//===----------------------------------------------------------------------===// 4820// Type Predicates. 4821//===----------------------------------------------------------------------===// 4822 4823/// isObjCNSObjectType - Return true if this is an NSObject object using 4824/// NSObject attribute on a c-style pointer type. 4825/// FIXME - Make it work directly on types. 4826/// FIXME: Move to Type. 4827/// 4828bool ASTContext::isObjCNSObjectType(QualType Ty) const { 4829 if (const TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 4830 if (TypedefNameDecl *TD = TDT->getDecl()) 4831 if (TD->getAttr<ObjCNSObjectAttr>()) 4832 return true; 4833 } 4834 return false; 4835} 4836 4837/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 4838/// garbage collection attribute. 4839/// 4840Qualifiers::GC ASTContext::getObjCGCAttrKind(QualType Ty) const { 4841 if (getLangOptions().getGCMode() == LangOptions::NonGC) 4842 return Qualifiers::GCNone; 4843 4844 assert(getLangOptions().ObjC1); 4845 Qualifiers::GC GCAttrs = Ty.getObjCGCAttr(); 4846 4847 // Default behaviour under objective-C's gc is for ObjC pointers 4848 // (or pointers to them) be treated as though they were declared 4849 // as __strong. 4850 if (GCAttrs == Qualifiers::GCNone) { 4851 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 4852 return Qualifiers::Strong; 4853 else if (Ty->isPointerType()) 4854 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 4855 } else { 4856 // It's not valid to set GC attributes on anything that isn't a 4857 // pointer. 4858#ifndef NDEBUG 4859 QualType CT = Ty->getCanonicalTypeInternal(); 4860 while (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 4861 CT = AT->getElementType(); 4862 assert(CT->isAnyPointerType() || CT->isBlockPointerType()); 4863#endif 4864 } 4865 return GCAttrs; 4866} 4867 4868//===----------------------------------------------------------------------===// 4869// Type Compatibility Testing 4870//===----------------------------------------------------------------------===// 4871 4872/// areCompatVectorTypes - Return true if the two specified vector types are 4873/// compatible. 4874static bool areCompatVectorTypes(const VectorType *LHS, 4875 const VectorType *RHS) { 4876 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 4877 return LHS->getElementType() == RHS->getElementType() && 4878 LHS->getNumElements() == RHS->getNumElements(); 4879} 4880 4881bool ASTContext::areCompatibleVectorTypes(QualType FirstVec, 4882 QualType SecondVec) { 4883 assert(FirstVec->isVectorType() && "FirstVec should be a vector type"); 4884 assert(SecondVec->isVectorType() && "SecondVec should be a vector type"); 4885 4886 if (hasSameUnqualifiedType(FirstVec, SecondVec)) 4887 return true; 4888 4889 // Treat Neon vector types and most AltiVec vector types as if they are the 4890 // equivalent GCC vector types. 4891 const VectorType *First = FirstVec->getAs<VectorType>(); 4892 const VectorType *Second = SecondVec->getAs<VectorType>(); 4893 if (First->getNumElements() == Second->getNumElements() && 4894 hasSameType(First->getElementType(), Second->getElementType()) && 4895 First->getVectorKind() != VectorType::AltiVecPixel && 4896 First->getVectorKind() != VectorType::AltiVecBool && 4897 Second->getVectorKind() != VectorType::AltiVecPixel && 4898 Second->getVectorKind() != VectorType::AltiVecBool) 4899 return true; 4900 4901 return false; 4902} 4903 4904//===----------------------------------------------------------------------===// 4905// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 4906//===----------------------------------------------------------------------===// 4907 4908/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 4909/// inheritance hierarchy of 'rProto'. 4910bool 4911ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 4912 ObjCProtocolDecl *rProto) const { 4913 if (lProto == rProto) 4914 return true; 4915 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 4916 E = rProto->protocol_end(); PI != E; ++PI) 4917 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 4918 return true; 4919 return false; 4920} 4921 4922/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 4923/// return true if lhs's protocols conform to rhs's protocol; false 4924/// otherwise. 4925bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 4926 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 4927 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 4928 return false; 4929} 4930 4931/// ObjCQualifiedClassTypesAreCompatible - compare Class<p,...> and 4932/// Class<p1, ...>. 4933bool ASTContext::ObjCQualifiedClassTypesAreCompatible(QualType lhs, 4934 QualType rhs) { 4935 const ObjCObjectPointerType *lhsQID = lhs->getAs<ObjCObjectPointerType>(); 4936 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4937 assert ((lhsQID && rhsOPT) && "ObjCQualifiedClassTypesAreCompatible"); 4938 4939 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4940 E = lhsQID->qual_end(); I != E; ++I) { 4941 bool match = false; 4942 ObjCProtocolDecl *lhsProto = *I; 4943 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4944 E = rhsOPT->qual_end(); J != E; ++J) { 4945 ObjCProtocolDecl *rhsProto = *J; 4946 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto)) { 4947 match = true; 4948 break; 4949 } 4950 } 4951 if (!match) 4952 return false; 4953 } 4954 return true; 4955} 4956 4957/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 4958/// ObjCQualifiedIDType. 4959bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4960 bool compare) { 4961 // Allow id<P..> and an 'id' or void* type in all cases. 4962 if (lhs->isVoidPointerType() || 4963 lhs->isObjCIdType() || lhs->isObjCClassType()) 4964 return true; 4965 else if (rhs->isVoidPointerType() || 4966 rhs->isObjCIdType() || rhs->isObjCClassType()) 4967 return true; 4968 4969 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4970 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4971 4972 if (!rhsOPT) return false; 4973 4974 if (rhsOPT->qual_empty()) { 4975 // If the RHS is a unqualified interface pointer "NSString*", 4976 // make sure we check the class hierarchy. 4977 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4978 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4979 E = lhsQID->qual_end(); I != E; ++I) { 4980 // when comparing an id<P> on lhs with a static type on rhs, 4981 // see if static class implements all of id's protocols, directly or 4982 // through its super class and categories. 4983 if (!rhsID->ClassImplementsProtocol(*I, true)) 4984 return false; 4985 } 4986 } 4987 // If there are no qualifiers and no interface, we have an 'id'. 4988 return true; 4989 } 4990 // Both the right and left sides have qualifiers. 4991 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4992 E = lhsQID->qual_end(); I != E; ++I) { 4993 ObjCProtocolDecl *lhsProto = *I; 4994 bool match = false; 4995 4996 // when comparing an id<P> on lhs with a static type on rhs, 4997 // see if static class implements all of id's protocols, directly or 4998 // through its super class and categories. 4999 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 5000 E = rhsOPT->qual_end(); J != E; ++J) { 5001 ObjCProtocolDecl *rhsProto = *J; 5002 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5003 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5004 match = true; 5005 break; 5006 } 5007 } 5008 // If the RHS is a qualified interface pointer "NSString<P>*", 5009 // make sure we check the class hierarchy. 5010 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 5011 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5012 E = lhsQID->qual_end(); I != E; ++I) { 5013 // when comparing an id<P> on lhs with a static type on rhs, 5014 // see if static class implements all of id's protocols, directly or 5015 // through its super class and categories. 5016 if (rhsID->ClassImplementsProtocol(*I, true)) { 5017 match = true; 5018 break; 5019 } 5020 } 5021 } 5022 if (!match) 5023 return false; 5024 } 5025 5026 return true; 5027 } 5028 5029 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 5030 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 5031 5032 if (const ObjCObjectPointerType *lhsOPT = 5033 lhs->getAsObjCInterfacePointerType()) { 5034 // If both the right and left sides have qualifiers. 5035 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 5036 E = lhsOPT->qual_end(); I != E; ++I) { 5037 ObjCProtocolDecl *lhsProto = *I; 5038 bool match = false; 5039 5040 // when comparing an id<P> on rhs with a static type on lhs, 5041 // see if static class implements all of id's protocols, directly or 5042 // through its super class and categories. 5043 // First, lhs protocols in the qualifier list must be found, direct 5044 // or indirect in rhs's qualifier list or it is a mismatch. 5045 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 5046 E = rhsQID->qual_end(); J != E; ++J) { 5047 ObjCProtocolDecl *rhsProto = *J; 5048 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5049 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5050 match = true; 5051 break; 5052 } 5053 } 5054 if (!match) 5055 return false; 5056 } 5057 5058 // Static class's protocols, or its super class or category protocols 5059 // must be found, direct or indirect in rhs's qualifier list or it is a mismatch. 5060 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 5061 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 5062 CollectInheritedProtocols(lhsID, LHSInheritedProtocols); 5063 // This is rather dubious but matches gcc's behavior. If lhs has 5064 // no type qualifier and its class has no static protocol(s) 5065 // assume that it is mismatch. 5066 if (LHSInheritedProtocols.empty() && lhsOPT->qual_empty()) 5067 return false; 5068 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5069 LHSInheritedProtocols.begin(), 5070 E = LHSInheritedProtocols.end(); I != E; ++I) { 5071 bool match = false; 5072 ObjCProtocolDecl *lhsProto = (*I); 5073 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 5074 E = rhsQID->qual_end(); J != E; ++J) { 5075 ObjCProtocolDecl *rhsProto = *J; 5076 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5077 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5078 match = true; 5079 break; 5080 } 5081 } 5082 if (!match) 5083 return false; 5084 } 5085 } 5086 return true; 5087 } 5088 return false; 5089} 5090 5091/// canAssignObjCInterfaces - Return true if the two interface types are 5092/// compatible for assignment from RHS to LHS. This handles validation of any 5093/// protocol qualifiers on the LHS or RHS. 5094/// 5095bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 5096 const ObjCObjectPointerType *RHSOPT) { 5097 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 5098 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 5099 5100 // If either type represents the built-in 'id' or 'Class' types, return true. 5101 if (LHS->isObjCUnqualifiedIdOrClass() || 5102 RHS->isObjCUnqualifiedIdOrClass()) 5103 return true; 5104 5105 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 5106 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 5107 QualType(RHSOPT,0), 5108 false); 5109 5110 if (LHS->isObjCQualifiedClass() && RHS->isObjCQualifiedClass()) 5111 return ObjCQualifiedClassTypesAreCompatible(QualType(LHSOPT,0), 5112 QualType(RHSOPT,0)); 5113 5114 // If we have 2 user-defined types, fall into that path. 5115 if (LHS->getInterface() && RHS->getInterface()) 5116 return canAssignObjCInterfaces(LHS, RHS); 5117 5118 return false; 5119} 5120 5121/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 5122/// for providing type-safety for objective-c pointers used to pass/return 5123/// arguments in block literals. When passed as arguments, passing 'A*' where 5124/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 5125/// not OK. For the return type, the opposite is not OK. 5126bool ASTContext::canAssignObjCInterfacesInBlockPointer( 5127 const ObjCObjectPointerType *LHSOPT, 5128 const ObjCObjectPointerType *RHSOPT, 5129 bool BlockReturnType) { 5130 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 5131 return true; 5132 5133 if (LHSOPT->isObjCBuiltinType()) { 5134 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 5135 } 5136 5137 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 5138 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 5139 QualType(RHSOPT,0), 5140 false); 5141 5142 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 5143 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 5144 if (LHS && RHS) { // We have 2 user-defined types. 5145 if (LHS != RHS) { 5146 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 5147 return BlockReturnType; 5148 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 5149 return !BlockReturnType; 5150 } 5151 else 5152 return true; 5153 } 5154 return false; 5155} 5156 5157/// getIntersectionOfProtocols - This routine finds the intersection of set 5158/// of protocols inherited from two distinct objective-c pointer objects. 5159/// It is used to build composite qualifier list of the composite type of 5160/// the conditional expression involving two objective-c pointer objects. 5161static 5162void getIntersectionOfProtocols(ASTContext &Context, 5163 const ObjCObjectPointerType *LHSOPT, 5164 const ObjCObjectPointerType *RHSOPT, 5165 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 5166 5167 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 5168 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 5169 assert(LHS->getInterface() && "LHS must have an interface base"); 5170 assert(RHS->getInterface() && "RHS must have an interface base"); 5171 5172 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 5173 unsigned LHSNumProtocols = LHS->getNumProtocols(); 5174 if (LHSNumProtocols > 0) 5175 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 5176 else { 5177 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 5178 Context.CollectInheritedProtocols(LHS->getInterface(), 5179 LHSInheritedProtocols); 5180 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 5181 LHSInheritedProtocols.end()); 5182 } 5183 5184 unsigned RHSNumProtocols = RHS->getNumProtocols(); 5185 if (RHSNumProtocols > 0) { 5186 ObjCProtocolDecl **RHSProtocols = 5187 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 5188 for (unsigned i = 0; i < RHSNumProtocols; ++i) 5189 if (InheritedProtocolSet.count(RHSProtocols[i])) 5190 IntersectionOfProtocols.push_back(RHSProtocols[i]); 5191 } 5192 else { 5193 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 5194 Context.CollectInheritedProtocols(RHS->getInterface(), 5195 RHSInheritedProtocols); 5196 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5197 RHSInheritedProtocols.begin(), 5198 E = RHSInheritedProtocols.end(); I != E; ++I) 5199 if (InheritedProtocolSet.count((*I))) 5200 IntersectionOfProtocols.push_back((*I)); 5201 } 5202} 5203 5204/// areCommonBaseCompatible - Returns common base class of the two classes if 5205/// one found. Note that this is O'2 algorithm. But it will be called as the 5206/// last type comparison in a ?-exp of ObjC pointer types before a 5207/// warning is issued. So, its invokation is extremely rare. 5208QualType ASTContext::areCommonBaseCompatible( 5209 const ObjCObjectPointerType *Lptr, 5210 const ObjCObjectPointerType *Rptr) { 5211 const ObjCObjectType *LHS = Lptr->getObjectType(); 5212 const ObjCObjectType *RHS = Rptr->getObjectType(); 5213 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 5214 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 5215 if (!LDecl || !RDecl || (LDecl == RDecl)) 5216 return QualType(); 5217 5218 do { 5219 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 5220 if (canAssignObjCInterfaces(LHS, RHS)) { 5221 llvm::SmallVector<ObjCProtocolDecl *, 8> Protocols; 5222 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 5223 5224 QualType Result = QualType(LHS, 0); 5225 if (!Protocols.empty()) 5226 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 5227 Result = getObjCObjectPointerType(Result); 5228 return Result; 5229 } 5230 } while ((LDecl = LDecl->getSuperClass())); 5231 5232 return QualType(); 5233} 5234 5235bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 5236 const ObjCObjectType *RHS) { 5237 assert(LHS->getInterface() && "LHS is not an interface type"); 5238 assert(RHS->getInterface() && "RHS is not an interface type"); 5239 5240 // Verify that the base decls are compatible: the RHS must be a subclass of 5241 // the LHS. 5242 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 5243 return false; 5244 5245 // RHS must have a superset of the protocols in the LHS. If the LHS is not 5246 // protocol qualified at all, then we are good. 5247 if (LHS->getNumProtocols() == 0) 5248 return true; 5249 5250 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, 5251 // more detailed analysis is required. 5252 if (RHS->getNumProtocols() == 0) { 5253 // OK, if LHS is a superclass of RHS *and* 5254 // this superclass is assignment compatible with LHS. 5255 // false otherwise. 5256 bool IsSuperClass = 5257 LHS->getInterface()->isSuperClassOf(RHS->getInterface()); 5258 if (IsSuperClass) { 5259 // OK if conversion of LHS to SuperClass results in narrowing of types 5260 // ; i.e., SuperClass may implement at least one of the protocols 5261 // in LHS's protocol list. Example, SuperObj<P1> = lhs<P1,P2> is ok. 5262 // But not SuperObj<P1,P2,P3> = lhs<P1,P2>. 5263 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> SuperClassInheritedProtocols; 5264 CollectInheritedProtocols(RHS->getInterface(), SuperClassInheritedProtocols); 5265 // If super class has no protocols, it is not a match. 5266 if (SuperClassInheritedProtocols.empty()) 5267 return false; 5268 5269 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 5270 LHSPE = LHS->qual_end(); 5271 LHSPI != LHSPE; LHSPI++) { 5272 bool SuperImplementsProtocol = false; 5273 ObjCProtocolDecl *LHSProto = (*LHSPI); 5274 5275 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5276 SuperClassInheritedProtocols.begin(), 5277 E = SuperClassInheritedProtocols.end(); I != E; ++I) { 5278 ObjCProtocolDecl *SuperClassProto = (*I); 5279 if (SuperClassProto->lookupProtocolNamed(LHSProto->getIdentifier())) { 5280 SuperImplementsProtocol = true; 5281 break; 5282 } 5283 } 5284 if (!SuperImplementsProtocol) 5285 return false; 5286 } 5287 return true; 5288 } 5289 return false; 5290 } 5291 5292 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 5293 LHSPE = LHS->qual_end(); 5294 LHSPI != LHSPE; LHSPI++) { 5295 bool RHSImplementsProtocol = false; 5296 5297 // If the RHS doesn't implement the protocol on the left, the types 5298 // are incompatible. 5299 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 5300 RHSPE = RHS->qual_end(); 5301 RHSPI != RHSPE; RHSPI++) { 5302 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 5303 RHSImplementsProtocol = true; 5304 break; 5305 } 5306 } 5307 // FIXME: For better diagnostics, consider passing back the protocol name. 5308 if (!RHSImplementsProtocol) 5309 return false; 5310 } 5311 // The RHS implements all protocols listed on the LHS. 5312 return true; 5313} 5314 5315bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 5316 // get the "pointed to" types 5317 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 5318 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 5319 5320 if (!LHSOPT || !RHSOPT) 5321 return false; 5322 5323 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 5324 canAssignObjCInterfaces(RHSOPT, LHSOPT); 5325} 5326 5327bool ASTContext::canBindObjCObjectType(QualType To, QualType From) { 5328 return canAssignObjCInterfaces( 5329 getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(), 5330 getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>()); 5331} 5332 5333/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 5334/// both shall have the identically qualified version of a compatible type. 5335/// C99 6.2.7p1: Two types have compatible types if their types are the 5336/// same. See 6.7.[2,3,5] for additional rules. 5337bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS, 5338 bool CompareUnqualified) { 5339 if (getLangOptions().CPlusPlus) 5340 return hasSameType(LHS, RHS); 5341 5342 return !mergeTypes(LHS, RHS, false, CompareUnqualified).isNull(); 5343} 5344 5345bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 5346 return !mergeTypes(LHS, RHS, true).isNull(); 5347} 5348 5349/// mergeTransparentUnionType - if T is a transparent union type and a member 5350/// of T is compatible with SubType, return the merged type, else return 5351/// QualType() 5352QualType ASTContext::mergeTransparentUnionType(QualType T, QualType SubType, 5353 bool OfBlockPointer, 5354 bool Unqualified) { 5355 if (const RecordType *UT = T->getAsUnionType()) { 5356 RecordDecl *UD = UT->getDecl(); 5357 if (UD->hasAttr<TransparentUnionAttr>()) { 5358 for (RecordDecl::field_iterator it = UD->field_begin(), 5359 itend = UD->field_end(); it != itend; ++it) { 5360 QualType ET = it->getType().getUnqualifiedType(); 5361 QualType MT = mergeTypes(ET, SubType, OfBlockPointer, Unqualified); 5362 if (!MT.isNull()) 5363 return MT; 5364 } 5365 } 5366 } 5367 5368 return QualType(); 5369} 5370 5371/// mergeFunctionArgumentTypes - merge two types which appear as function 5372/// argument types 5373QualType ASTContext::mergeFunctionArgumentTypes(QualType lhs, QualType rhs, 5374 bool OfBlockPointer, 5375 bool Unqualified) { 5376 // GNU extension: two types are compatible if they appear as a function 5377 // argument, one of the types is a transparent union type and the other 5378 // type is compatible with a union member 5379 QualType lmerge = mergeTransparentUnionType(lhs, rhs, OfBlockPointer, 5380 Unqualified); 5381 if (!lmerge.isNull()) 5382 return lmerge; 5383 5384 QualType rmerge = mergeTransparentUnionType(rhs, lhs, OfBlockPointer, 5385 Unqualified); 5386 if (!rmerge.isNull()) 5387 return rmerge; 5388 5389 return mergeTypes(lhs, rhs, OfBlockPointer, Unqualified); 5390} 5391 5392QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 5393 bool OfBlockPointer, 5394 bool Unqualified) { 5395 const FunctionType *lbase = lhs->getAs<FunctionType>(); 5396 const FunctionType *rbase = rhs->getAs<FunctionType>(); 5397 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 5398 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 5399 bool allLTypes = true; 5400 bool allRTypes = true; 5401 5402 // Check return type 5403 QualType retType; 5404 if (OfBlockPointer) { 5405 QualType RHS = rbase->getResultType(); 5406 QualType LHS = lbase->getResultType(); 5407 bool UnqualifiedResult = Unqualified; 5408 if (!UnqualifiedResult) 5409 UnqualifiedResult = (!RHS.hasQualifiers() && LHS.hasQualifiers()); 5410 retType = mergeTypes(LHS, RHS, true, UnqualifiedResult, true); 5411 } 5412 else 5413 retType = mergeTypes(lbase->getResultType(), rbase->getResultType(), false, 5414 Unqualified); 5415 if (retType.isNull()) return QualType(); 5416 5417 if (Unqualified) 5418 retType = retType.getUnqualifiedType(); 5419 5420 CanQualType LRetType = getCanonicalType(lbase->getResultType()); 5421 CanQualType RRetType = getCanonicalType(rbase->getResultType()); 5422 if (Unqualified) { 5423 LRetType = LRetType.getUnqualifiedType(); 5424 RRetType = RRetType.getUnqualifiedType(); 5425 } 5426 5427 if (getCanonicalType(retType) != LRetType) 5428 allLTypes = false; 5429 if (getCanonicalType(retType) != RRetType) 5430 allRTypes = false; 5431 5432 // FIXME: double check this 5433 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 5434 // rbase->getRegParmAttr() != 0 && 5435 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 5436 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 5437 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 5438 5439 // Compatible functions must have compatible calling conventions 5440 if (!isSameCallConv(lbaseInfo.getCC(), rbaseInfo.getCC())) 5441 return QualType(); 5442 5443 // Regparm is part of the calling convention. 5444 if (lbaseInfo.getHasRegParm() != rbaseInfo.getHasRegParm()) 5445 return QualType(); 5446 if (lbaseInfo.getRegParm() != rbaseInfo.getRegParm()) 5447 return QualType(); 5448 5449 // It's noreturn if either type is. 5450 // FIXME: some uses, e.g. conditional exprs, really want this to be 'both'. 5451 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 5452 if (NoReturn != lbaseInfo.getNoReturn()) 5453 allLTypes = false; 5454 if (NoReturn != rbaseInfo.getNoReturn()) 5455 allRTypes = false; 5456 5457 FunctionType::ExtInfo einfo(NoReturn, 5458 lbaseInfo.getHasRegParm(), 5459 lbaseInfo.getRegParm(), 5460 lbaseInfo.getCC()); 5461 5462 if (lproto && rproto) { // two C99 style function prototypes 5463 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 5464 "C++ shouldn't be here"); 5465 unsigned lproto_nargs = lproto->getNumArgs(); 5466 unsigned rproto_nargs = rproto->getNumArgs(); 5467 5468 // Compatible functions must have the same number of arguments 5469 if (lproto_nargs != rproto_nargs) 5470 return QualType(); 5471 5472 // Variadic and non-variadic functions aren't compatible 5473 if (lproto->isVariadic() != rproto->isVariadic()) 5474 return QualType(); 5475 5476 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 5477 return QualType(); 5478 5479 // Check argument compatibility 5480 llvm::SmallVector<QualType, 10> types; 5481 for (unsigned i = 0; i < lproto_nargs; i++) { 5482 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 5483 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 5484 QualType argtype = mergeFunctionArgumentTypes(largtype, rargtype, 5485 OfBlockPointer, 5486 Unqualified); 5487 if (argtype.isNull()) return QualType(); 5488 5489 if (Unqualified) 5490 argtype = argtype.getUnqualifiedType(); 5491 5492 types.push_back(argtype); 5493 if (Unqualified) { 5494 largtype = largtype.getUnqualifiedType(); 5495 rargtype = rargtype.getUnqualifiedType(); 5496 } 5497 5498 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 5499 allLTypes = false; 5500 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 5501 allRTypes = false; 5502 } 5503 if (allLTypes) return lhs; 5504 if (allRTypes) return rhs; 5505 5506 FunctionProtoType::ExtProtoInfo EPI = lproto->getExtProtoInfo(); 5507 EPI.ExtInfo = einfo; 5508 return getFunctionType(retType, types.begin(), types.size(), EPI); 5509 } 5510 5511 if (lproto) allRTypes = false; 5512 if (rproto) allLTypes = false; 5513 5514 const FunctionProtoType *proto = lproto ? lproto : rproto; 5515 if (proto) { 5516 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 5517 if (proto->isVariadic()) return QualType(); 5518 // Check that the types are compatible with the types that 5519 // would result from default argument promotions (C99 6.7.5.3p15). 5520 // The only types actually affected are promotable integer 5521 // types and floats, which would be passed as a different 5522 // type depending on whether the prototype is visible. 5523 unsigned proto_nargs = proto->getNumArgs(); 5524 for (unsigned i = 0; i < proto_nargs; ++i) { 5525 QualType argTy = proto->getArgType(i); 5526 5527 // Look at the promotion type of enum types, since that is the type used 5528 // to pass enum values. 5529 if (const EnumType *Enum = argTy->getAs<EnumType>()) 5530 argTy = Enum->getDecl()->getPromotionType(); 5531 5532 if (argTy->isPromotableIntegerType() || 5533 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 5534 return QualType(); 5535 } 5536 5537 if (allLTypes) return lhs; 5538 if (allRTypes) return rhs; 5539 5540 FunctionProtoType::ExtProtoInfo EPI = proto->getExtProtoInfo(); 5541 EPI.ExtInfo = einfo; 5542 return getFunctionType(retType, proto->arg_type_begin(), 5543 proto->getNumArgs(), EPI); 5544 } 5545 5546 if (allLTypes) return lhs; 5547 if (allRTypes) return rhs; 5548 return getFunctionNoProtoType(retType, einfo); 5549} 5550 5551QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 5552 bool OfBlockPointer, 5553 bool Unqualified, bool BlockReturnType) { 5554 // C++ [expr]: If an expression initially has the type "reference to T", the 5555 // type is adjusted to "T" prior to any further analysis, the expression 5556 // designates the object or function denoted by the reference, and the 5557 // expression is an lvalue unless the reference is an rvalue reference and 5558 // the expression is a function call (possibly inside parentheses). 5559 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 5560 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 5561 5562 if (Unqualified) { 5563 LHS = LHS.getUnqualifiedType(); 5564 RHS = RHS.getUnqualifiedType(); 5565 } 5566 5567 QualType LHSCan = getCanonicalType(LHS), 5568 RHSCan = getCanonicalType(RHS); 5569 5570 // If two types are identical, they are compatible. 5571 if (LHSCan == RHSCan) 5572 return LHS; 5573 5574 // If the qualifiers are different, the types aren't compatible... mostly. 5575 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5576 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5577 if (LQuals != RQuals) { 5578 // If any of these qualifiers are different, we have a type 5579 // mismatch. 5580 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5581 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5582 return QualType(); 5583 5584 // Exactly one GC qualifier difference is allowed: __strong is 5585 // okay if the other type has no GC qualifier but is an Objective 5586 // C object pointer (i.e. implicitly strong by default). We fix 5587 // this by pretending that the unqualified type was actually 5588 // qualified __strong. 5589 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5590 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5591 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5592 5593 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5594 return QualType(); 5595 5596 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 5597 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 5598 } 5599 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 5600 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 5601 } 5602 return QualType(); 5603 } 5604 5605 // Okay, qualifiers are equal. 5606 5607 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 5608 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 5609 5610 // We want to consider the two function types to be the same for these 5611 // comparisons, just force one to the other. 5612 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 5613 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 5614 5615 // Same as above for arrays 5616 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 5617 LHSClass = Type::ConstantArray; 5618 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 5619 RHSClass = Type::ConstantArray; 5620 5621 // ObjCInterfaces are just specialized ObjCObjects. 5622 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 5623 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 5624 5625 // Canonicalize ExtVector -> Vector. 5626 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 5627 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 5628 5629 // If the canonical type classes don't match. 5630 if (LHSClass != RHSClass) { 5631 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 5632 // a signed integer type, or an unsigned integer type. 5633 // Compatibility is based on the underlying type, not the promotion 5634 // type. 5635 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 5636 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 5637 return RHS; 5638 } 5639 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 5640 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 5641 return LHS; 5642 } 5643 5644 return QualType(); 5645 } 5646 5647 // The canonical type classes match. 5648 switch (LHSClass) { 5649#define TYPE(Class, Base) 5650#define ABSTRACT_TYPE(Class, Base) 5651#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 5652#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 5653#define DEPENDENT_TYPE(Class, Base) case Type::Class: 5654#include "clang/AST/TypeNodes.def" 5655 assert(false && "Non-canonical and dependent types shouldn't get here"); 5656 return QualType(); 5657 5658 case Type::LValueReference: 5659 case Type::RValueReference: 5660 case Type::MemberPointer: 5661 assert(false && "C++ should never be in mergeTypes"); 5662 return QualType(); 5663 5664 case Type::ObjCInterface: 5665 case Type::IncompleteArray: 5666 case Type::VariableArray: 5667 case Type::FunctionProto: 5668 case Type::ExtVector: 5669 assert(false && "Types are eliminated above"); 5670 return QualType(); 5671 5672 case Type::Pointer: 5673 { 5674 // Merge two pointer types, while trying to preserve typedef info 5675 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 5676 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 5677 if (Unqualified) { 5678 LHSPointee = LHSPointee.getUnqualifiedType(); 5679 RHSPointee = RHSPointee.getUnqualifiedType(); 5680 } 5681 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, false, 5682 Unqualified); 5683 if (ResultType.isNull()) return QualType(); 5684 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5685 return LHS; 5686 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5687 return RHS; 5688 return getPointerType(ResultType); 5689 } 5690 case Type::BlockPointer: 5691 { 5692 // Merge two block pointer types, while trying to preserve typedef info 5693 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 5694 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 5695 if (Unqualified) { 5696 LHSPointee = LHSPointee.getUnqualifiedType(); 5697 RHSPointee = RHSPointee.getUnqualifiedType(); 5698 } 5699 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer, 5700 Unqualified); 5701 if (ResultType.isNull()) return QualType(); 5702 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5703 return LHS; 5704 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5705 return RHS; 5706 return getBlockPointerType(ResultType); 5707 } 5708 case Type::ConstantArray: 5709 { 5710 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 5711 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 5712 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 5713 return QualType(); 5714 5715 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 5716 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 5717 if (Unqualified) { 5718 LHSElem = LHSElem.getUnqualifiedType(); 5719 RHSElem = RHSElem.getUnqualifiedType(); 5720 } 5721 5722 QualType ResultType = mergeTypes(LHSElem, RHSElem, false, Unqualified); 5723 if (ResultType.isNull()) return QualType(); 5724 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5725 return LHS; 5726 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5727 return RHS; 5728 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 5729 ArrayType::ArraySizeModifier(), 0); 5730 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 5731 ArrayType::ArraySizeModifier(), 0); 5732 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 5733 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 5734 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5735 return LHS; 5736 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5737 return RHS; 5738 if (LVAT) { 5739 // FIXME: This isn't correct! But tricky to implement because 5740 // the array's size has to be the size of LHS, but the type 5741 // has to be different. 5742 return LHS; 5743 } 5744 if (RVAT) { 5745 // FIXME: This isn't correct! But tricky to implement because 5746 // the array's size has to be the size of RHS, but the type 5747 // has to be different. 5748 return RHS; 5749 } 5750 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 5751 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 5752 return getIncompleteArrayType(ResultType, 5753 ArrayType::ArraySizeModifier(), 0); 5754 } 5755 case Type::FunctionNoProto: 5756 return mergeFunctionTypes(LHS, RHS, OfBlockPointer, Unqualified); 5757 case Type::Record: 5758 case Type::Enum: 5759 return QualType(); 5760 case Type::Builtin: 5761 // Only exactly equal builtin types are compatible, which is tested above. 5762 return QualType(); 5763 case Type::Complex: 5764 // Distinct complex types are incompatible. 5765 return QualType(); 5766 case Type::Vector: 5767 // FIXME: The merged type should be an ExtVector! 5768 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 5769 RHSCan->getAs<VectorType>())) 5770 return LHS; 5771 return QualType(); 5772 case Type::ObjCObject: { 5773 // Check if the types are assignment compatible. 5774 // FIXME: This should be type compatibility, e.g. whether 5775 // "LHS x; RHS x;" at global scope is legal. 5776 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 5777 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 5778 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 5779 return LHS; 5780 5781 return QualType(); 5782 } 5783 case Type::ObjCObjectPointer: { 5784 if (OfBlockPointer) { 5785 if (canAssignObjCInterfacesInBlockPointer( 5786 LHS->getAs<ObjCObjectPointerType>(), 5787 RHS->getAs<ObjCObjectPointerType>(), 5788 BlockReturnType)) 5789 return LHS; 5790 return QualType(); 5791 } 5792 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 5793 RHS->getAs<ObjCObjectPointerType>())) 5794 return LHS; 5795 5796 return QualType(); 5797 } 5798 } 5799 5800 return QualType(); 5801} 5802 5803/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 5804/// 'RHS' attributes and returns the merged version; including for function 5805/// return types. 5806QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 5807 QualType LHSCan = getCanonicalType(LHS), 5808 RHSCan = getCanonicalType(RHS); 5809 // If two types are identical, they are compatible. 5810 if (LHSCan == RHSCan) 5811 return LHS; 5812 if (RHSCan->isFunctionType()) { 5813 if (!LHSCan->isFunctionType()) 5814 return QualType(); 5815 QualType OldReturnType = 5816 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 5817 QualType NewReturnType = 5818 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 5819 QualType ResReturnType = 5820 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 5821 if (ResReturnType.isNull()) 5822 return QualType(); 5823 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 5824 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 5825 // In either case, use OldReturnType to build the new function type. 5826 const FunctionType *F = LHS->getAs<FunctionType>(); 5827 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 5828 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 5829 EPI.ExtInfo = getFunctionExtInfo(LHS); 5830 QualType ResultType 5831 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 5832 FPT->getNumArgs(), EPI); 5833 return ResultType; 5834 } 5835 } 5836 return QualType(); 5837 } 5838 5839 // If the qualifiers are different, the types can still be merged. 5840 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5841 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5842 if (LQuals != RQuals) { 5843 // If any of these qualifiers are different, we have a type mismatch. 5844 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5845 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5846 return QualType(); 5847 5848 // Exactly one GC qualifier difference is allowed: __strong is 5849 // okay if the other type has no GC qualifier but is an Objective 5850 // C object pointer (i.e. implicitly strong by default). We fix 5851 // this by pretending that the unqualified type was actually 5852 // qualified __strong. 5853 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5854 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5855 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5856 5857 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5858 return QualType(); 5859 5860 if (GC_L == Qualifiers::Strong) 5861 return LHS; 5862 if (GC_R == Qualifiers::Strong) 5863 return RHS; 5864 return QualType(); 5865 } 5866 5867 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 5868 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5869 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5870 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 5871 if (ResQT == LHSBaseQT) 5872 return LHS; 5873 if (ResQT == RHSBaseQT) 5874 return RHS; 5875 } 5876 return QualType(); 5877} 5878 5879//===----------------------------------------------------------------------===// 5880// Integer Predicates 5881//===----------------------------------------------------------------------===// 5882 5883unsigned ASTContext::getIntWidth(QualType T) const { 5884 if (const EnumType *ET = dyn_cast<EnumType>(T)) 5885 T = ET->getDecl()->getIntegerType(); 5886 if (T->isBooleanType()) 5887 return 1; 5888 // For builtin types, just use the standard type sizing method 5889 return (unsigned)getTypeSize(T); 5890} 5891 5892QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 5893 assert(T->hasSignedIntegerRepresentation() && "Unexpected type"); 5894 5895 // Turn <4 x signed int> -> <4 x unsigned int> 5896 if (const VectorType *VTy = T->getAs<VectorType>()) 5897 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 5898 VTy->getNumElements(), VTy->getVectorKind()); 5899 5900 // For enums, we return the unsigned version of the base type. 5901 if (const EnumType *ETy = T->getAs<EnumType>()) 5902 T = ETy->getDecl()->getIntegerType(); 5903 5904 const BuiltinType *BTy = T->getAs<BuiltinType>(); 5905 assert(BTy && "Unexpected signed integer type"); 5906 switch (BTy->getKind()) { 5907 case BuiltinType::Char_S: 5908 case BuiltinType::SChar: 5909 return UnsignedCharTy; 5910 case BuiltinType::Short: 5911 return UnsignedShortTy; 5912 case BuiltinType::Int: 5913 return UnsignedIntTy; 5914 case BuiltinType::Long: 5915 return UnsignedLongTy; 5916 case BuiltinType::LongLong: 5917 return UnsignedLongLongTy; 5918 case BuiltinType::Int128: 5919 return UnsignedInt128Ty; 5920 default: 5921 assert(0 && "Unexpected signed integer type"); 5922 return QualType(); 5923 } 5924} 5925 5926ASTMutationListener::~ASTMutationListener() { } 5927 5928 5929//===----------------------------------------------------------------------===// 5930// Builtin Type Computation 5931//===----------------------------------------------------------------------===// 5932 5933/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 5934/// pointer over the consumed characters. This returns the resultant type. If 5935/// AllowTypeModifiers is false then modifier like * are not parsed, just basic 5936/// types. This allows "v2i*" to be parsed as a pointer to a v2i instead of 5937/// a vector of "i*". 5938/// 5939/// RequiresICE is filled in on return to indicate whether the value is required 5940/// to be an Integer Constant Expression. 5941static QualType DecodeTypeFromStr(const char *&Str, const ASTContext &Context, 5942 ASTContext::GetBuiltinTypeError &Error, 5943 bool &RequiresICE, 5944 bool AllowTypeModifiers) { 5945 // Modifiers. 5946 int HowLong = 0; 5947 bool Signed = false, Unsigned = false; 5948 RequiresICE = false; 5949 5950 // Read the prefixed modifiers first. 5951 bool Done = false; 5952 while (!Done) { 5953 switch (*Str++) { 5954 default: Done = true; --Str; break; 5955 case 'I': 5956 RequiresICE = true; 5957 break; 5958 case 'S': 5959 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 5960 assert(!Signed && "Can't use 'S' modifier multiple times!"); 5961 Signed = true; 5962 break; 5963 case 'U': 5964 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 5965 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 5966 Unsigned = true; 5967 break; 5968 case 'L': 5969 assert(HowLong <= 2 && "Can't have LLLL modifier"); 5970 ++HowLong; 5971 break; 5972 } 5973 } 5974 5975 QualType Type; 5976 5977 // Read the base type. 5978 switch (*Str++) { 5979 default: assert(0 && "Unknown builtin type letter!"); 5980 case 'v': 5981 assert(HowLong == 0 && !Signed && !Unsigned && 5982 "Bad modifiers used with 'v'!"); 5983 Type = Context.VoidTy; 5984 break; 5985 case 'f': 5986 assert(HowLong == 0 && !Signed && !Unsigned && 5987 "Bad modifiers used with 'f'!"); 5988 Type = Context.FloatTy; 5989 break; 5990 case 'd': 5991 assert(HowLong < 2 && !Signed && !Unsigned && 5992 "Bad modifiers used with 'd'!"); 5993 if (HowLong) 5994 Type = Context.LongDoubleTy; 5995 else 5996 Type = Context.DoubleTy; 5997 break; 5998 case 's': 5999 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 6000 if (Unsigned) 6001 Type = Context.UnsignedShortTy; 6002 else 6003 Type = Context.ShortTy; 6004 break; 6005 case 'i': 6006 if (HowLong == 3) 6007 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 6008 else if (HowLong == 2) 6009 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 6010 else if (HowLong == 1) 6011 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 6012 else 6013 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 6014 break; 6015 case 'c': 6016 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 6017 if (Signed) 6018 Type = Context.SignedCharTy; 6019 else if (Unsigned) 6020 Type = Context.UnsignedCharTy; 6021 else 6022 Type = Context.CharTy; 6023 break; 6024 case 'b': // boolean 6025 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 6026 Type = Context.BoolTy; 6027 break; 6028 case 'z': // size_t. 6029 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 6030 Type = Context.getSizeType(); 6031 break; 6032 case 'F': 6033 Type = Context.getCFConstantStringType(); 6034 break; 6035 case 'G': 6036 Type = Context.getObjCIdType(); 6037 break; 6038 case 'H': 6039 Type = Context.getObjCSelType(); 6040 break; 6041 case 'a': 6042 Type = Context.getBuiltinVaListType(); 6043 assert(!Type.isNull() && "builtin va list type not initialized!"); 6044 break; 6045 case 'A': 6046 // This is a "reference" to a va_list; however, what exactly 6047 // this means depends on how va_list is defined. There are two 6048 // different kinds of va_list: ones passed by value, and ones 6049 // passed by reference. An example of a by-value va_list is 6050 // x86, where va_list is a char*. An example of by-ref va_list 6051 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 6052 // we want this argument to be a char*&; for x86-64, we want 6053 // it to be a __va_list_tag*. 6054 Type = Context.getBuiltinVaListType(); 6055 assert(!Type.isNull() && "builtin va list type not initialized!"); 6056 if (Type->isArrayType()) 6057 Type = Context.getArrayDecayedType(Type); 6058 else 6059 Type = Context.getLValueReferenceType(Type); 6060 break; 6061 case 'V': { 6062 char *End; 6063 unsigned NumElements = strtoul(Str, &End, 10); 6064 assert(End != Str && "Missing vector size"); 6065 Str = End; 6066 6067 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, 6068 RequiresICE, false); 6069 assert(!RequiresICE && "Can't require vector ICE"); 6070 6071 // TODO: No way to make AltiVec vectors in builtins yet. 6072 Type = Context.getVectorType(ElementType, NumElements, 6073 VectorType::GenericVector); 6074 break; 6075 } 6076 case 'X': { 6077 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, RequiresICE, 6078 false); 6079 assert(!RequiresICE && "Can't require complex ICE"); 6080 Type = Context.getComplexType(ElementType); 6081 break; 6082 } 6083 case 'P': 6084 Type = Context.getFILEType(); 6085 if (Type.isNull()) { 6086 Error = ASTContext::GE_Missing_stdio; 6087 return QualType(); 6088 } 6089 break; 6090 case 'J': 6091 if (Signed) 6092 Type = Context.getsigjmp_bufType(); 6093 else 6094 Type = Context.getjmp_bufType(); 6095 6096 if (Type.isNull()) { 6097 Error = ASTContext::GE_Missing_setjmp; 6098 return QualType(); 6099 } 6100 break; 6101 } 6102 6103 // If there are modifiers and if we're allowed to parse them, go for it. 6104 Done = !AllowTypeModifiers; 6105 while (!Done) { 6106 switch (char c = *Str++) { 6107 default: Done = true; --Str; break; 6108 case '*': 6109 case '&': { 6110 // Both pointers and references can have their pointee types 6111 // qualified with an address space. 6112 char *End; 6113 unsigned AddrSpace = strtoul(Str, &End, 10); 6114 if (End != Str && AddrSpace != 0) { 6115 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 6116 Str = End; 6117 } 6118 if (c == '*') 6119 Type = Context.getPointerType(Type); 6120 else 6121 Type = Context.getLValueReferenceType(Type); 6122 break; 6123 } 6124 // FIXME: There's no way to have a built-in with an rvalue ref arg. 6125 case 'C': 6126 Type = Type.withConst(); 6127 break; 6128 case 'D': 6129 Type = Context.getVolatileType(Type); 6130 break; 6131 } 6132 } 6133 6134 assert((!RequiresICE || Type->isIntegralOrEnumerationType()) && 6135 "Integer constant 'I' type must be an integer"); 6136 6137 return Type; 6138} 6139 6140/// GetBuiltinType - Return the type for the specified builtin. 6141QualType ASTContext::GetBuiltinType(unsigned Id, 6142 GetBuiltinTypeError &Error, 6143 unsigned *IntegerConstantArgs) const { 6144 const char *TypeStr = BuiltinInfo.GetTypeString(Id); 6145 6146 llvm::SmallVector<QualType, 8> ArgTypes; 6147 6148 bool RequiresICE = false; 6149 Error = GE_None; 6150 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error, 6151 RequiresICE, true); 6152 if (Error != GE_None) 6153 return QualType(); 6154 6155 assert(!RequiresICE && "Result of intrinsic cannot be required to be an ICE"); 6156 6157 while (TypeStr[0] && TypeStr[0] != '.') { 6158 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error, RequiresICE, true); 6159 if (Error != GE_None) 6160 return QualType(); 6161 6162 // If this argument is required to be an IntegerConstantExpression and the 6163 // caller cares, fill in the bitmask we return. 6164 if (RequiresICE && IntegerConstantArgs) 6165 *IntegerConstantArgs |= 1 << ArgTypes.size(); 6166 6167 // Do array -> pointer decay. The builtin should use the decayed type. 6168 if (Ty->isArrayType()) 6169 Ty = getArrayDecayedType(Ty); 6170 6171 ArgTypes.push_back(Ty); 6172 } 6173 6174 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 6175 "'.' should only occur at end of builtin type list!"); 6176 6177 FunctionType::ExtInfo EI; 6178 if (BuiltinInfo.isNoReturn(Id)) EI = EI.withNoReturn(true); 6179 6180 bool Variadic = (TypeStr[0] == '.'); 6181 6182 // We really shouldn't be making a no-proto type here, especially in C++. 6183 if (ArgTypes.empty() && Variadic) 6184 return getFunctionNoProtoType(ResType, EI); 6185 6186 FunctionProtoType::ExtProtoInfo EPI; 6187 EPI.ExtInfo = EI; 6188 EPI.Variadic = Variadic; 6189 6190 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), EPI); 6191} 6192 6193GVALinkage ASTContext::GetGVALinkageForFunction(const FunctionDecl *FD) { 6194 GVALinkage External = GVA_StrongExternal; 6195 6196 Linkage L = FD->getLinkage(); 6197 switch (L) { 6198 case NoLinkage: 6199 case InternalLinkage: 6200 case UniqueExternalLinkage: 6201 return GVA_Internal; 6202 6203 case ExternalLinkage: 6204 switch (FD->getTemplateSpecializationKind()) { 6205 case TSK_Undeclared: 6206 case TSK_ExplicitSpecialization: 6207 External = GVA_StrongExternal; 6208 break; 6209 6210 case TSK_ExplicitInstantiationDefinition: 6211 return GVA_ExplicitTemplateInstantiation; 6212 6213 case TSK_ExplicitInstantiationDeclaration: 6214 case TSK_ImplicitInstantiation: 6215 External = GVA_TemplateInstantiation; 6216 break; 6217 } 6218 } 6219 6220 if (!FD->isInlined()) 6221 return External; 6222 6223 if (!getLangOptions().CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 6224 // GNU or C99 inline semantics. Determine whether this symbol should be 6225 // externally visible. 6226 if (FD->isInlineDefinitionExternallyVisible()) 6227 return External; 6228 6229 // C99 inline semantics, where the symbol is not externally visible. 6230 return GVA_C99Inline; 6231 } 6232 6233 // C++0x [temp.explicit]p9: 6234 // [ Note: The intent is that an inline function that is the subject of 6235 // an explicit instantiation declaration will still be implicitly 6236 // instantiated when used so that the body can be considered for 6237 // inlining, but that no out-of-line copy of the inline function would be 6238 // generated in the translation unit. -- end note ] 6239 if (FD->getTemplateSpecializationKind() 6240 == TSK_ExplicitInstantiationDeclaration) 6241 return GVA_C99Inline; 6242 6243 return GVA_CXXInline; 6244} 6245 6246GVALinkage ASTContext::GetGVALinkageForVariable(const VarDecl *VD) { 6247 // If this is a static data member, compute the kind of template 6248 // specialization. Otherwise, this variable is not part of a 6249 // template. 6250 TemplateSpecializationKind TSK = TSK_Undeclared; 6251 if (VD->isStaticDataMember()) 6252 TSK = VD->getTemplateSpecializationKind(); 6253 6254 Linkage L = VD->getLinkage(); 6255 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 6256 VD->getType()->getLinkage() == UniqueExternalLinkage) 6257 L = UniqueExternalLinkage; 6258 6259 switch (L) { 6260 case NoLinkage: 6261 case InternalLinkage: 6262 case UniqueExternalLinkage: 6263 return GVA_Internal; 6264 6265 case ExternalLinkage: 6266 switch (TSK) { 6267 case TSK_Undeclared: 6268 case TSK_ExplicitSpecialization: 6269 return GVA_StrongExternal; 6270 6271 case TSK_ExplicitInstantiationDeclaration: 6272 llvm_unreachable("Variable should not be instantiated"); 6273 // Fall through to treat this like any other instantiation. 6274 6275 case TSK_ExplicitInstantiationDefinition: 6276 return GVA_ExplicitTemplateInstantiation; 6277 6278 case TSK_ImplicitInstantiation: 6279 return GVA_TemplateInstantiation; 6280 } 6281 } 6282 6283 return GVA_StrongExternal; 6284} 6285 6286bool ASTContext::DeclMustBeEmitted(const Decl *D) { 6287 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 6288 if (!VD->isFileVarDecl()) 6289 return false; 6290 } else if (!isa<FunctionDecl>(D)) 6291 return false; 6292 6293 // Weak references don't produce any output by themselves. 6294 if (D->hasAttr<WeakRefAttr>()) 6295 return false; 6296 6297 // Aliases and used decls are required. 6298 if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>()) 6299 return true; 6300 6301 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 6302 // Forward declarations aren't required. 6303 if (!FD->doesThisDeclarationHaveABody()) 6304 return false; 6305 6306 // Constructors and destructors are required. 6307 if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>()) 6308 return true; 6309 6310 // The key function for a class is required. 6311 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 6312 const CXXRecordDecl *RD = MD->getParent(); 6313 if (MD->isOutOfLine() && RD->isDynamicClass()) { 6314 const CXXMethodDecl *KeyFunc = getKeyFunction(RD); 6315 if (KeyFunc && KeyFunc->getCanonicalDecl() == MD->getCanonicalDecl()) 6316 return true; 6317 } 6318 } 6319 6320 GVALinkage Linkage = GetGVALinkageForFunction(FD); 6321 6322 // static, static inline, always_inline, and extern inline functions can 6323 // always be deferred. Normal inline functions can be deferred in C99/C++. 6324 // Implicit template instantiations can also be deferred in C++. 6325 if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 6326 Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 6327 return false; 6328 return true; 6329 } 6330 6331 const VarDecl *VD = cast<VarDecl>(D); 6332 assert(VD->isFileVarDecl() && "Expected file scoped var"); 6333 6334 if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) 6335 return false; 6336 6337 // Structs that have non-trivial constructors or destructors are required. 6338 6339 // FIXME: Handle references. 6340 // FIXME: Be more selective about which constructors we care about. 6341 if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { 6342 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 6343 if (RD->hasDefinition() && !(RD->hasTrivialDefaultConstructor() && 6344 RD->hasTrivialCopyConstructor() && 6345 RD->hasTrivialMoveConstructor() && 6346 RD->hasTrivialDestructor())) 6347 return true; 6348 } 6349 } 6350 6351 GVALinkage L = GetGVALinkageForVariable(VD); 6352 if (L == GVA_Internal || L == GVA_TemplateInstantiation) { 6353 if (!(VD->getInit() && VD->getInit()->HasSideEffects(*this))) 6354 return false; 6355 } 6356 6357 return true; 6358} 6359 6360CallingConv ASTContext::getDefaultMethodCallConv() { 6361 // Pass through to the C++ ABI object 6362 return ABI->getDefaultMethodCallConv(); 6363} 6364 6365bool ASTContext::isNearlyEmpty(const CXXRecordDecl *RD) const { 6366 // Pass through to the C++ ABI object 6367 return ABI->isNearlyEmpty(RD); 6368} 6369 6370MangleContext *ASTContext::createMangleContext() { 6371 switch (Target.getCXXABI()) { 6372 case CXXABI_ARM: 6373 case CXXABI_Itanium: 6374 return createItaniumMangleContext(*this, getDiagnostics()); 6375 case CXXABI_Microsoft: 6376 return createMicrosoftMangleContext(*this, getDiagnostics()); 6377 } 6378 assert(0 && "Unsupported ABI"); 6379 return 0; 6380} 6381 6382CXXABI::~CXXABI() {} 6383 6384size_t ASTContext::getSideTableAllocatedMemory() const { 6385 size_t bytes = 0; 6386 bytes += ASTRecordLayouts.getMemorySize(); 6387 bytes += ObjCLayouts.getMemorySize(); 6388 bytes += KeyFunctions.getMemorySize(); 6389 bytes += ObjCImpls.getMemorySize(); 6390 bytes += BlockVarCopyInits.getMemorySize(); 6391 bytes += DeclAttrs.getMemorySize(); 6392 bytes += InstantiatedFromStaticDataMember.getMemorySize(); 6393 bytes += InstantiatedFromUsingDecl.getMemorySize(); 6394 bytes += InstantiatedFromUsingShadowDecl.getMemorySize(); 6395 bytes += InstantiatedFromUnnamedFieldDecl.getMemorySize(); 6396 return bytes; 6397} 6398 6399