ASTContext.cpp revision cfe9af250f466e7e38becea4428990448ae07737
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 35using namespace clang; 36 37unsigned ASTContext::NumImplicitDefaultConstructors; 38unsigned ASTContext::NumImplicitDefaultConstructorsDeclared; 39unsigned ASTContext::NumImplicitCopyConstructors; 40unsigned ASTContext::NumImplicitCopyConstructorsDeclared; 41unsigned ASTContext::NumImplicitCopyAssignmentOperators; 42unsigned ASTContext::NumImplicitCopyAssignmentOperatorsDeclared; 43unsigned ASTContext::NumImplicitDestructors; 44unsigned ASTContext::NumImplicitDestructorsDeclared; 45 46enum FloatingRank { 47 FloatRank, DoubleRank, LongDoubleRank 48}; 49 50void 51ASTContext::CanonicalTemplateTemplateParm::Profile(llvm::FoldingSetNodeID &ID, 52 TemplateTemplateParmDecl *Parm) { 53 ID.AddInteger(Parm->getDepth()); 54 ID.AddInteger(Parm->getPosition()); 55 ID.AddBoolean(Parm->isParameterPack()); 56 57 TemplateParameterList *Params = Parm->getTemplateParameters(); 58 ID.AddInteger(Params->size()); 59 for (TemplateParameterList::const_iterator P = Params->begin(), 60 PEnd = Params->end(); 61 P != PEnd; ++P) { 62 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) { 63 ID.AddInteger(0); 64 ID.AddBoolean(TTP->isParameterPack()); 65 continue; 66 } 67 68 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 69 ID.AddInteger(1); 70 ID.AddBoolean(NTTP->isParameterPack()); 71 ID.AddPointer(NTTP->getType().getAsOpaquePtr()); 72 if (NTTP->isExpandedParameterPack()) { 73 ID.AddBoolean(true); 74 ID.AddInteger(NTTP->getNumExpansionTypes()); 75 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) 76 ID.AddPointer(NTTP->getExpansionType(I).getAsOpaquePtr()); 77 } else 78 ID.AddBoolean(false); 79 continue; 80 } 81 82 TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P); 83 ID.AddInteger(2); 84 Profile(ID, TTP); 85 } 86} 87 88TemplateTemplateParmDecl * 89ASTContext::getCanonicalTemplateTemplateParmDecl( 90 TemplateTemplateParmDecl *TTP) const { 91 // Check if we already have a canonical template template parameter. 92 llvm::FoldingSetNodeID ID; 93 CanonicalTemplateTemplateParm::Profile(ID, TTP); 94 void *InsertPos = 0; 95 CanonicalTemplateTemplateParm *Canonical 96 = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 97 if (Canonical) 98 return Canonical->getParam(); 99 100 // Build a canonical template parameter list. 101 TemplateParameterList *Params = TTP->getTemplateParameters(); 102 llvm::SmallVector<NamedDecl *, 4> CanonParams; 103 CanonParams.reserve(Params->size()); 104 for (TemplateParameterList::const_iterator P = Params->begin(), 105 PEnd = Params->end(); 106 P != PEnd; ++P) { 107 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) 108 CanonParams.push_back( 109 TemplateTypeParmDecl::Create(*this, getTranslationUnitDecl(), 110 SourceLocation(), TTP->getDepth(), 111 TTP->getIndex(), 0, false, 112 TTP->isParameterPack())); 113 else if (NonTypeTemplateParmDecl *NTTP 114 = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 115 QualType T = getCanonicalType(NTTP->getType()); 116 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(T); 117 NonTypeTemplateParmDecl *Param; 118 if (NTTP->isExpandedParameterPack()) { 119 llvm::SmallVector<QualType, 2> ExpandedTypes; 120 llvm::SmallVector<TypeSourceInfo *, 2> ExpandedTInfos; 121 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) { 122 ExpandedTypes.push_back(getCanonicalType(NTTP->getExpansionType(I))); 123 ExpandedTInfos.push_back( 124 getTrivialTypeSourceInfo(ExpandedTypes.back())); 125 } 126 127 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 128 SourceLocation(), 129 NTTP->getDepth(), 130 NTTP->getPosition(), 0, 131 T, 132 TInfo, 133 ExpandedTypes.data(), 134 ExpandedTypes.size(), 135 ExpandedTInfos.data()); 136 } else { 137 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 138 SourceLocation(), 139 NTTP->getDepth(), 140 NTTP->getPosition(), 0, 141 T, 142 NTTP->isParameterPack(), 143 TInfo); 144 } 145 CanonParams.push_back(Param); 146 147 } else 148 CanonParams.push_back(getCanonicalTemplateTemplateParmDecl( 149 cast<TemplateTemplateParmDecl>(*P))); 150 } 151 152 TemplateTemplateParmDecl *CanonTTP 153 = TemplateTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 154 SourceLocation(), TTP->getDepth(), 155 TTP->getPosition(), 156 TTP->isParameterPack(), 157 0, 158 TemplateParameterList::Create(*this, SourceLocation(), 159 SourceLocation(), 160 CanonParams.data(), 161 CanonParams.size(), 162 SourceLocation())); 163 164 // Get the new insert position for the node we care about. 165 Canonical = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 166 assert(Canonical == 0 && "Shouldn't be in the map!"); 167 (void)Canonical; 168 169 // Create the canonical template template parameter entry. 170 Canonical = new (*this) CanonicalTemplateTemplateParm(CanonTTP); 171 CanonTemplateTemplateParms.InsertNode(Canonical, InsertPos); 172 return CanonTTP; 173} 174 175CXXABI *ASTContext::createCXXABI(const TargetInfo &T) { 176 if (!LangOpts.CPlusPlus) return 0; 177 178 switch (T.getCXXABI()) { 179 case CXXABI_ARM: 180 return CreateARMCXXABI(*this); 181 case CXXABI_Itanium: 182 return CreateItaniumCXXABI(*this); 183 case CXXABI_Microsoft: 184 return CreateMicrosoftCXXABI(*this); 185 } 186 return 0; 187} 188 189ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 190 const TargetInfo &t, 191 IdentifierTable &idents, SelectorTable &sels, 192 Builtin::Context &builtins, 193 unsigned size_reserve) : 194 TemplateSpecializationTypes(this_()), 195 DependentTemplateSpecializationTypes(this_()), 196 GlobalNestedNameSpecifier(0), IsInt128Installed(false), 197 CFConstantStringTypeDecl(0), NSConstantStringTypeDecl(0), 198 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 199 sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 200 cudaConfigureCallDecl(0), 201 NullTypeSourceInfo(QualType()), 202 SourceMgr(SM), LangOpts(LOpts), ABI(createCXXABI(t)), Target(t), 203 Idents(idents), Selectors(sels), 204 BuiltinInfo(builtins), 205 DeclarationNames(*this), 206 ExternalSource(0), Listener(0), PrintingPolicy(LOpts), 207 LastSDM(0, 0), 208 UniqueBlockByRefTypeID(0) { 209 ObjCIdRedefinitionType = QualType(); 210 ObjCClassRedefinitionType = QualType(); 211 ObjCSelRedefinitionType = QualType(); 212 if (size_reserve > 0) Types.reserve(size_reserve); 213 TUDecl = TranslationUnitDecl::Create(*this); 214 InitBuiltinTypes(); 215} 216 217ASTContext::~ASTContext() { 218 // Release the DenseMaps associated with DeclContext objects. 219 // FIXME: Is this the ideal solution? 220 ReleaseDeclContextMaps(); 221 222 // Call all of the deallocation functions. 223 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 224 Deallocations[I].first(Deallocations[I].second); 225 226 // Release all of the memory associated with overridden C++ methods. 227 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 228 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 229 OM != OMEnd; ++OM) 230 OM->second.Destroy(); 231 232 // ASTRecordLayout objects in ASTRecordLayouts must always be destroyed 233 // because they can contain DenseMaps. 234 for (llvm::DenseMap<const ObjCContainerDecl*, 235 const ASTRecordLayout*>::iterator 236 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) 237 // Increment in loop to prevent using deallocated memory. 238 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 239 R->Destroy(*this); 240 241 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 242 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 243 // Increment in loop to prevent using deallocated memory. 244 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 245 R->Destroy(*this); 246 } 247 248 for (llvm::DenseMap<const Decl*, AttrVec*>::iterator A = DeclAttrs.begin(), 249 AEnd = DeclAttrs.end(); 250 A != AEnd; ++A) 251 A->second->~AttrVec(); 252} 253 254void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 255 Deallocations.push_back(std::make_pair(Callback, Data)); 256} 257 258void 259ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 260 ExternalSource.reset(Source.take()); 261} 262 263void ASTContext::PrintStats() const { 264 fprintf(stderr, "*** AST Context Stats:\n"); 265 fprintf(stderr, " %d types total.\n", (int)Types.size()); 266 267 unsigned counts[] = { 268#define TYPE(Name, Parent) 0, 269#define ABSTRACT_TYPE(Name, Parent) 270#include "clang/AST/TypeNodes.def" 271 0 // Extra 272 }; 273 274 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 275 Type *T = Types[i]; 276 counts[(unsigned)T->getTypeClass()]++; 277 } 278 279 unsigned Idx = 0; 280 unsigned TotalBytes = 0; 281#define TYPE(Name, Parent) \ 282 if (counts[Idx]) \ 283 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 284 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 285 ++Idx; 286#define ABSTRACT_TYPE(Name, Parent) 287#include "clang/AST/TypeNodes.def" 288 289 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 290 291 // Implicit special member functions. 292 fprintf(stderr, " %u/%u implicit default constructors created\n", 293 NumImplicitDefaultConstructorsDeclared, 294 NumImplicitDefaultConstructors); 295 fprintf(stderr, " %u/%u implicit copy constructors created\n", 296 NumImplicitCopyConstructorsDeclared, 297 NumImplicitCopyConstructors); 298 fprintf(stderr, " %u/%u implicit copy assignment operators created\n", 299 NumImplicitCopyAssignmentOperatorsDeclared, 300 NumImplicitCopyAssignmentOperators); 301 fprintf(stderr, " %u/%u implicit destructors created\n", 302 NumImplicitDestructorsDeclared, NumImplicitDestructors); 303 304 if (ExternalSource.get()) { 305 fprintf(stderr, "\n"); 306 ExternalSource->PrintStats(); 307 } 308 309 BumpAlloc.PrintStats(); 310} 311 312 313void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 314 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 315 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 316 Types.push_back(Ty); 317} 318 319void ASTContext::InitBuiltinTypes() { 320 assert(VoidTy.isNull() && "Context reinitialized?"); 321 322 // C99 6.2.5p19. 323 InitBuiltinType(VoidTy, BuiltinType::Void); 324 325 // C99 6.2.5p2. 326 InitBuiltinType(BoolTy, BuiltinType::Bool); 327 // C99 6.2.5p3. 328 if (LangOpts.CharIsSigned) 329 InitBuiltinType(CharTy, BuiltinType::Char_S); 330 else 331 InitBuiltinType(CharTy, BuiltinType::Char_U); 332 // C99 6.2.5p4. 333 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 334 InitBuiltinType(ShortTy, BuiltinType::Short); 335 InitBuiltinType(IntTy, BuiltinType::Int); 336 InitBuiltinType(LongTy, BuiltinType::Long); 337 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 338 339 // C99 6.2.5p6. 340 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 341 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 342 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 343 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 344 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 345 346 // C99 6.2.5p10. 347 InitBuiltinType(FloatTy, BuiltinType::Float); 348 InitBuiltinType(DoubleTy, BuiltinType::Double); 349 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 350 351 // GNU extension, 128-bit integers. 352 InitBuiltinType(Int128Ty, BuiltinType::Int128); 353 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 354 355 if (LangOpts.CPlusPlus) { // C++ 3.9.1p5 356 if (!LangOpts.ShortWChar) 357 InitBuiltinType(WCharTy, BuiltinType::WChar_S); 358 else // -fshort-wchar makes wchar_t be unsigned. 359 InitBuiltinType(WCharTy, BuiltinType::WChar_U); 360 } else // C99 361 WCharTy = getFromTargetType(Target.getWCharType()); 362 363 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 364 InitBuiltinType(Char16Ty, BuiltinType::Char16); 365 else // C99 366 Char16Ty = getFromTargetType(Target.getChar16Type()); 367 368 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 369 InitBuiltinType(Char32Ty, BuiltinType::Char32); 370 else // C99 371 Char32Ty = getFromTargetType(Target.getChar32Type()); 372 373 // Placeholder type for type-dependent expressions whose type is 374 // completely unknown. No code should ever check a type against 375 // DependentTy and users should never see it; however, it is here to 376 // help diagnose failures to properly check for type-dependent 377 // expressions. 378 InitBuiltinType(DependentTy, BuiltinType::Dependent); 379 380 // Placeholder type for functions. 381 InitBuiltinType(OverloadTy, BuiltinType::Overload); 382 383 // C99 6.2.5p11. 384 FloatComplexTy = getComplexType(FloatTy); 385 DoubleComplexTy = getComplexType(DoubleTy); 386 LongDoubleComplexTy = getComplexType(LongDoubleTy); 387 388 BuiltinVaListType = QualType(); 389 390 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 391 ObjCIdTypedefType = QualType(); 392 ObjCClassTypedefType = QualType(); 393 ObjCSelTypedefType = QualType(); 394 395 // Builtin types for 'id', 'Class', and 'SEL'. 396 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 397 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 398 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 399 400 ObjCConstantStringType = QualType(); 401 402 // void * type 403 VoidPtrTy = getPointerType(VoidTy); 404 405 // nullptr type (C++0x 2.14.7) 406 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 407} 408 409Diagnostic &ASTContext::getDiagnostics() const { 410 return SourceMgr.getDiagnostics(); 411} 412 413AttrVec& ASTContext::getDeclAttrs(const Decl *D) { 414 AttrVec *&Result = DeclAttrs[D]; 415 if (!Result) { 416 void *Mem = Allocate(sizeof(AttrVec)); 417 Result = new (Mem) AttrVec; 418 } 419 420 return *Result; 421} 422 423/// \brief Erase the attributes corresponding to the given declaration. 424void ASTContext::eraseDeclAttrs(const Decl *D) { 425 llvm::DenseMap<const Decl*, AttrVec*>::iterator Pos = DeclAttrs.find(D); 426 if (Pos != DeclAttrs.end()) { 427 Pos->second->~AttrVec(); 428 DeclAttrs.erase(Pos); 429 } 430} 431 432 433MemberSpecializationInfo * 434ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 435 assert(Var->isStaticDataMember() && "Not a static data member"); 436 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 437 = InstantiatedFromStaticDataMember.find(Var); 438 if (Pos == InstantiatedFromStaticDataMember.end()) 439 return 0; 440 441 return Pos->second; 442} 443 444void 445ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 446 TemplateSpecializationKind TSK, 447 SourceLocation PointOfInstantiation) { 448 assert(Inst->isStaticDataMember() && "Not a static data member"); 449 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 450 assert(!InstantiatedFromStaticDataMember[Inst] && 451 "Already noted what static data member was instantiated from"); 452 InstantiatedFromStaticDataMember[Inst] 453 = new (*this) MemberSpecializationInfo(Tmpl, TSK, PointOfInstantiation); 454} 455 456NamedDecl * 457ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 458 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 459 = InstantiatedFromUsingDecl.find(UUD); 460 if (Pos == InstantiatedFromUsingDecl.end()) 461 return 0; 462 463 return Pos->second; 464} 465 466void 467ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 468 assert((isa<UsingDecl>(Pattern) || 469 isa<UnresolvedUsingValueDecl>(Pattern) || 470 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 471 "pattern decl is not a using decl"); 472 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 473 InstantiatedFromUsingDecl[Inst] = Pattern; 474} 475 476UsingShadowDecl * 477ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 478 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 479 = InstantiatedFromUsingShadowDecl.find(Inst); 480 if (Pos == InstantiatedFromUsingShadowDecl.end()) 481 return 0; 482 483 return Pos->second; 484} 485 486void 487ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 488 UsingShadowDecl *Pattern) { 489 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 490 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 491} 492 493FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 494 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 495 = InstantiatedFromUnnamedFieldDecl.find(Field); 496 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 497 return 0; 498 499 return Pos->second; 500} 501 502void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 503 FieldDecl *Tmpl) { 504 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 505 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 506 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 507 "Already noted what unnamed field was instantiated from"); 508 509 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 510} 511 512ASTContext::overridden_cxx_method_iterator 513ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 514 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 515 = OverriddenMethods.find(Method); 516 if (Pos == OverriddenMethods.end()) 517 return 0; 518 519 return Pos->second.begin(); 520} 521 522ASTContext::overridden_cxx_method_iterator 523ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 524 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 525 = OverriddenMethods.find(Method); 526 if (Pos == OverriddenMethods.end()) 527 return 0; 528 529 return Pos->second.end(); 530} 531 532unsigned 533ASTContext::overridden_methods_size(const CXXMethodDecl *Method) const { 534 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 535 = OverriddenMethods.find(Method); 536 if (Pos == OverriddenMethods.end()) 537 return 0; 538 539 return Pos->second.size(); 540} 541 542void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 543 const CXXMethodDecl *Overridden) { 544 OverriddenMethods[Method].push_back(Overridden); 545} 546 547//===----------------------------------------------------------------------===// 548// Type Sizing and Analysis 549//===----------------------------------------------------------------------===// 550 551/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 552/// scalar floating point type. 553const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 554 const BuiltinType *BT = T->getAs<BuiltinType>(); 555 assert(BT && "Not a floating point type!"); 556 switch (BT->getKind()) { 557 default: assert(0 && "Not a floating point type!"); 558 case BuiltinType::Float: return Target.getFloatFormat(); 559 case BuiltinType::Double: return Target.getDoubleFormat(); 560 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 561 } 562} 563 564/// getDeclAlign - Return a conservative estimate of the alignment of the 565/// specified decl. Note that bitfields do not have a valid alignment, so 566/// this method will assert on them. 567/// If @p RefAsPointee, references are treated like their underlying type 568/// (for alignof), else they're treated like pointers (for CodeGen). 569CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) const { 570 unsigned Align = Target.getCharWidth(); 571 572 bool UseAlignAttrOnly = false; 573 if (unsigned AlignFromAttr = D->getMaxAlignment()) { 574 Align = AlignFromAttr; 575 576 // __attribute__((aligned)) can increase or decrease alignment 577 // *except* on a struct or struct member, where it only increases 578 // alignment unless 'packed' is also specified. 579 // 580 // It is an error for [[align]] to decrease alignment, so we can 581 // ignore that possibility; Sema should diagnose it. 582 if (isa<FieldDecl>(D)) { 583 UseAlignAttrOnly = D->hasAttr<PackedAttr>() || 584 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 585 } else { 586 UseAlignAttrOnly = true; 587 } 588 } 589 590 // If we're using the align attribute only, just ignore everything 591 // else about the declaration and its type. 592 if (UseAlignAttrOnly) { 593 // do nothing 594 595 } else if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 596 QualType T = VD->getType(); 597 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 598 if (RefAsPointee) 599 T = RT->getPointeeType(); 600 else 601 T = getPointerType(RT->getPointeeType()); 602 } 603 if (!T->isIncompleteType() && !T->isFunctionType()) { 604 // Adjust alignments of declarations with array type by the 605 // large-array alignment on the target. 606 unsigned MinWidth = Target.getLargeArrayMinWidth(); 607 const ArrayType *arrayType; 608 if (MinWidth && (arrayType = getAsArrayType(T))) { 609 if (isa<VariableArrayType>(arrayType)) 610 Align = std::max(Align, Target.getLargeArrayAlign()); 611 else if (isa<ConstantArrayType>(arrayType) && 612 MinWidth <= getTypeSize(cast<ConstantArrayType>(arrayType))) 613 Align = std::max(Align, Target.getLargeArrayAlign()); 614 615 // Walk through any array types while we're at it. 616 T = getBaseElementType(arrayType); 617 } 618 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 619 } 620 621 // Fields can be subject to extra alignment constraints, like if 622 // the field is packed, the struct is packed, or the struct has a 623 // a max-field-alignment constraint (#pragma pack). So calculate 624 // the actual alignment of the field within the struct, and then 625 // (as we're expected to) constrain that by the alignment of the type. 626 if (const FieldDecl *field = dyn_cast<FieldDecl>(VD)) { 627 // So calculate the alignment of the field. 628 const ASTRecordLayout &layout = getASTRecordLayout(field->getParent()); 629 630 // Start with the record's overall alignment. 631 unsigned fieldAlign = toBits(layout.getAlignment()); 632 633 // Use the GCD of that and the offset within the record. 634 uint64_t offset = layout.getFieldOffset(field->getFieldIndex()); 635 if (offset > 0) { 636 // Alignment is always a power of 2, so the GCD will be a power of 2, 637 // which means we get to do this crazy thing instead of Euclid's. 638 uint64_t lowBitOfOffset = offset & (~offset + 1); 639 if (lowBitOfOffset < fieldAlign) 640 fieldAlign = static_cast<unsigned>(lowBitOfOffset); 641 } 642 643 Align = std::min(Align, fieldAlign); 644 } 645 } 646 647 return toCharUnitsFromBits(Align); 648} 649 650std::pair<CharUnits, CharUnits> 651ASTContext::getTypeInfoInChars(const Type *T) const { 652 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 653 return std::make_pair(toCharUnitsFromBits(Info.first), 654 toCharUnitsFromBits(Info.second)); 655} 656 657std::pair<CharUnits, CharUnits> 658ASTContext::getTypeInfoInChars(QualType T) const { 659 return getTypeInfoInChars(T.getTypePtr()); 660} 661 662/// getTypeSize - Return the size of the specified type, in bits. This method 663/// does not work on incomplete types. 664/// 665/// FIXME: Pointers into different addr spaces could have different sizes and 666/// alignment requirements: getPointerInfo should take an AddrSpace, this 667/// should take a QualType, &c. 668std::pair<uint64_t, unsigned> 669ASTContext::getTypeInfo(const Type *T) const { 670 uint64_t Width=0; 671 unsigned Align=8; 672 switch (T->getTypeClass()) { 673#define TYPE(Class, Base) 674#define ABSTRACT_TYPE(Class, Base) 675#define NON_CANONICAL_TYPE(Class, Base) 676#define DEPENDENT_TYPE(Class, Base) case Type::Class: 677#include "clang/AST/TypeNodes.def" 678 assert(false && "Should not see dependent types"); 679 break; 680 681 case Type::FunctionNoProto: 682 case Type::FunctionProto: 683 // GCC extension: alignof(function) = 32 bits 684 Width = 0; 685 Align = 32; 686 break; 687 688 case Type::IncompleteArray: 689 case Type::VariableArray: 690 Width = 0; 691 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 692 break; 693 694 case Type::ConstantArray: { 695 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 696 697 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 698 Width = EltInfo.first*CAT->getSize().getZExtValue(); 699 Align = EltInfo.second; 700 break; 701 } 702 case Type::ExtVector: 703 case Type::Vector: { 704 const VectorType *VT = cast<VectorType>(T); 705 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 706 Width = EltInfo.first*VT->getNumElements(); 707 Align = Width; 708 // If the alignment is not a power of 2, round up to the next power of 2. 709 // This happens for non-power-of-2 length vectors. 710 if (Align & (Align-1)) { 711 Align = llvm::NextPowerOf2(Align); 712 Width = llvm::RoundUpToAlignment(Width, Align); 713 } 714 break; 715 } 716 717 case Type::Builtin: 718 switch (cast<BuiltinType>(T)->getKind()) { 719 default: assert(0 && "Unknown builtin type!"); 720 case BuiltinType::Void: 721 // GCC extension: alignof(void) = 8 bits. 722 Width = 0; 723 Align = 8; 724 break; 725 726 case BuiltinType::Bool: 727 Width = Target.getBoolWidth(); 728 Align = Target.getBoolAlign(); 729 break; 730 case BuiltinType::Char_S: 731 case BuiltinType::Char_U: 732 case BuiltinType::UChar: 733 case BuiltinType::SChar: 734 Width = Target.getCharWidth(); 735 Align = Target.getCharAlign(); 736 break; 737 case BuiltinType::WChar_S: 738 case BuiltinType::WChar_U: 739 Width = Target.getWCharWidth(); 740 Align = Target.getWCharAlign(); 741 break; 742 case BuiltinType::Char16: 743 Width = Target.getChar16Width(); 744 Align = Target.getChar16Align(); 745 break; 746 case BuiltinType::Char32: 747 Width = Target.getChar32Width(); 748 Align = Target.getChar32Align(); 749 break; 750 case BuiltinType::UShort: 751 case BuiltinType::Short: 752 Width = Target.getShortWidth(); 753 Align = Target.getShortAlign(); 754 break; 755 case BuiltinType::UInt: 756 case BuiltinType::Int: 757 Width = Target.getIntWidth(); 758 Align = Target.getIntAlign(); 759 break; 760 case BuiltinType::ULong: 761 case BuiltinType::Long: 762 Width = Target.getLongWidth(); 763 Align = Target.getLongAlign(); 764 break; 765 case BuiltinType::ULongLong: 766 case BuiltinType::LongLong: 767 Width = Target.getLongLongWidth(); 768 Align = Target.getLongLongAlign(); 769 break; 770 case BuiltinType::Int128: 771 case BuiltinType::UInt128: 772 Width = 128; 773 Align = 128; // int128_t is 128-bit aligned on all targets. 774 break; 775 case BuiltinType::Float: 776 Width = Target.getFloatWidth(); 777 Align = Target.getFloatAlign(); 778 break; 779 case BuiltinType::Double: 780 Width = Target.getDoubleWidth(); 781 Align = Target.getDoubleAlign(); 782 break; 783 case BuiltinType::LongDouble: 784 Width = Target.getLongDoubleWidth(); 785 Align = Target.getLongDoubleAlign(); 786 break; 787 case BuiltinType::NullPtr: 788 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 789 Align = Target.getPointerAlign(0); // == sizeof(void*) 790 break; 791 case BuiltinType::ObjCId: 792 case BuiltinType::ObjCClass: 793 case BuiltinType::ObjCSel: 794 Width = Target.getPointerWidth(0); 795 Align = Target.getPointerAlign(0); 796 break; 797 } 798 break; 799 case Type::ObjCObjectPointer: 800 Width = Target.getPointerWidth(0); 801 Align = Target.getPointerAlign(0); 802 break; 803 case Type::BlockPointer: { 804 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 805 Width = Target.getPointerWidth(AS); 806 Align = Target.getPointerAlign(AS); 807 break; 808 } 809 case Type::LValueReference: 810 case Type::RValueReference: { 811 // alignof and sizeof should never enter this code path here, so we go 812 // the pointer route. 813 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 814 Width = Target.getPointerWidth(AS); 815 Align = Target.getPointerAlign(AS); 816 break; 817 } 818 case Type::Pointer: { 819 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 820 Width = Target.getPointerWidth(AS); 821 Align = Target.getPointerAlign(AS); 822 break; 823 } 824 case Type::MemberPointer: { 825 const MemberPointerType *MPT = cast<MemberPointerType>(T); 826 std::pair<uint64_t, unsigned> PtrDiffInfo = 827 getTypeInfo(getPointerDiffType()); 828 Width = PtrDiffInfo.first * ABI->getMemberPointerSize(MPT); 829 Align = PtrDiffInfo.second; 830 break; 831 } 832 case Type::Complex: { 833 // Complex types have the same alignment as their elements, but twice the 834 // size. 835 std::pair<uint64_t, unsigned> EltInfo = 836 getTypeInfo(cast<ComplexType>(T)->getElementType()); 837 Width = EltInfo.first*2; 838 Align = EltInfo.second; 839 break; 840 } 841 case Type::ObjCObject: 842 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 843 case Type::ObjCInterface: { 844 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 845 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 846 Width = toBits(Layout.getSize()); 847 Align = toBits(Layout.getAlignment()); 848 break; 849 } 850 case Type::Record: 851 case Type::Enum: { 852 const TagType *TT = cast<TagType>(T); 853 854 if (TT->getDecl()->isInvalidDecl()) { 855 Width = 1; 856 Align = 1; 857 break; 858 } 859 860 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 861 return getTypeInfo(ET->getDecl()->getIntegerType()); 862 863 const RecordType *RT = cast<RecordType>(TT); 864 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 865 Width = toBits(Layout.getSize()); 866 Align = toBits(Layout.getAlignment()); 867 break; 868 } 869 870 case Type::SubstTemplateTypeParm: 871 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 872 getReplacementType().getTypePtr()); 873 874 case Type::Auto: { 875 const AutoType *A = cast<AutoType>(T); 876 assert(A->isDeduced() && "Cannot request the size of a dependent type"); 877 return getTypeInfo(A->getDeducedType().getTypePtr()); 878 } 879 880 case Type::Paren: 881 return getTypeInfo(cast<ParenType>(T)->getInnerType().getTypePtr()); 882 883 case Type::Typedef: { 884 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 885 std::pair<uint64_t, unsigned> Info 886 = getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 887 // If the typedef has an aligned attribute on it, it overrides any computed 888 // alignment we have. This violates the GCC documentation (which says that 889 // attribute(aligned) can only round up) but matches its implementation. 890 if (unsigned AttrAlign = Typedef->getMaxAlignment()) 891 Align = AttrAlign; 892 else 893 Align = Info.second; 894 Width = Info.first; 895 break; 896 } 897 898 case Type::TypeOfExpr: 899 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 900 .getTypePtr()); 901 902 case Type::TypeOf: 903 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 904 905 case Type::Decltype: 906 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 907 .getTypePtr()); 908 909 case Type::Elaborated: 910 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 911 912 case Type::Attributed: 913 return getTypeInfo( 914 cast<AttributedType>(T)->getEquivalentType().getTypePtr()); 915 916 case Type::TemplateSpecialization: 917 assert(getCanonicalType(T) != T && 918 "Cannot request the size of a dependent type"); 919 // FIXME: this is likely to be wrong once we support template 920 // aliases, since a template alias could refer to a typedef that 921 // has an __aligned__ attribute on it. 922 return getTypeInfo(getCanonicalType(T)); 923 } 924 925 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 926 return std::make_pair(Width, Align); 927} 928 929/// toCharUnitsFromBits - Convert a size in bits to a size in characters. 930CharUnits ASTContext::toCharUnitsFromBits(int64_t BitSize) const { 931 return CharUnits::fromQuantity(BitSize / getCharWidth()); 932} 933 934/// toBits - Convert a size in characters to a size in characters. 935int64_t ASTContext::toBits(CharUnits CharSize) const { 936 return CharSize.getQuantity() * getCharWidth(); 937} 938 939/// getTypeSizeInChars - Return the size of the specified type, in characters. 940/// This method does not work on incomplete types. 941CharUnits ASTContext::getTypeSizeInChars(QualType T) const { 942 return toCharUnitsFromBits(getTypeSize(T)); 943} 944CharUnits ASTContext::getTypeSizeInChars(const Type *T) const { 945 return toCharUnitsFromBits(getTypeSize(T)); 946} 947 948/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 949/// characters. This method does not work on incomplete types. 950CharUnits ASTContext::getTypeAlignInChars(QualType T) const { 951 return toCharUnitsFromBits(getTypeAlign(T)); 952} 953CharUnits ASTContext::getTypeAlignInChars(const Type *T) const { 954 return toCharUnitsFromBits(getTypeAlign(T)); 955} 956 957/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 958/// type for the current target in bits. This can be different than the ABI 959/// alignment in cases where it is beneficial for performance to overalign 960/// a data type. 961unsigned ASTContext::getPreferredTypeAlign(const Type *T) const { 962 unsigned ABIAlign = getTypeAlign(T); 963 964 // Double and long long should be naturally aligned if possible. 965 if (const ComplexType* CT = T->getAs<ComplexType>()) 966 T = CT->getElementType().getTypePtr(); 967 if (T->isSpecificBuiltinType(BuiltinType::Double) || 968 T->isSpecificBuiltinType(BuiltinType::LongLong)) 969 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 970 971 return ABIAlign; 972} 973 974/// ShallowCollectObjCIvars - 975/// Collect all ivars, including those synthesized, in the current class. 976/// 977void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 978 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) const { 979 // FIXME. This need be removed but there are two many places which 980 // assume const-ness of ObjCInterfaceDecl 981 ObjCInterfaceDecl *IDecl = const_cast<ObjCInterfaceDecl *>(OI); 982 for (ObjCIvarDecl *Iv = IDecl->all_declared_ivar_begin(); Iv; 983 Iv= Iv->getNextIvar()) 984 Ivars.push_back(Iv); 985} 986 987/// DeepCollectObjCIvars - 988/// This routine first collects all declared, but not synthesized, ivars in 989/// super class and then collects all ivars, including those synthesized for 990/// current class. This routine is used for implementation of current class 991/// when all ivars, declared and synthesized are known. 992/// 993void ASTContext::DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, 994 bool leafClass, 995 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) const { 996 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 997 DeepCollectObjCIvars(SuperClass, false, Ivars); 998 if (!leafClass) { 999 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 1000 E = OI->ivar_end(); I != E; ++I) 1001 Ivars.push_back(*I); 1002 } 1003 else 1004 ShallowCollectObjCIvars(OI, Ivars); 1005} 1006 1007/// CollectInheritedProtocols - Collect all protocols in current class and 1008/// those inherited by it. 1009void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 1010 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 1011 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 1012 // We can use protocol_iterator here instead of 1013 // all_referenced_protocol_iterator since we are walking all categories. 1014 for (ObjCInterfaceDecl::all_protocol_iterator P = OI->all_referenced_protocol_begin(), 1015 PE = OI->all_referenced_protocol_end(); P != PE; ++P) { 1016 ObjCProtocolDecl *Proto = (*P); 1017 Protocols.insert(Proto); 1018 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1019 PE = Proto->protocol_end(); P != PE; ++P) { 1020 Protocols.insert(*P); 1021 CollectInheritedProtocols(*P, Protocols); 1022 } 1023 } 1024 1025 // Categories of this Interface. 1026 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 1027 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 1028 CollectInheritedProtocols(CDeclChain, Protocols); 1029 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 1030 while (SD) { 1031 CollectInheritedProtocols(SD, Protocols); 1032 SD = SD->getSuperClass(); 1033 } 1034 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 1035 for (ObjCCategoryDecl::protocol_iterator P = OC->protocol_begin(), 1036 PE = OC->protocol_end(); P != PE; ++P) { 1037 ObjCProtocolDecl *Proto = (*P); 1038 Protocols.insert(Proto); 1039 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1040 PE = Proto->protocol_end(); P != PE; ++P) 1041 CollectInheritedProtocols(*P, Protocols); 1042 } 1043 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 1044 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 1045 PE = OP->protocol_end(); P != PE; ++P) { 1046 ObjCProtocolDecl *Proto = (*P); 1047 Protocols.insert(Proto); 1048 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1049 PE = Proto->protocol_end(); P != PE; ++P) 1050 CollectInheritedProtocols(*P, Protocols); 1051 } 1052 } 1053} 1054 1055unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) const { 1056 unsigned count = 0; 1057 // Count ivars declared in class extension. 1058 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl; 1059 CDecl = CDecl->getNextClassExtension()) 1060 count += CDecl->ivar_size(); 1061 1062 // Count ivar defined in this class's implementation. This 1063 // includes synthesized ivars. 1064 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 1065 count += ImplDecl->ivar_size(); 1066 1067 return count; 1068} 1069 1070/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1071ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 1072 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1073 I = ObjCImpls.find(D); 1074 if (I != ObjCImpls.end()) 1075 return cast<ObjCImplementationDecl>(I->second); 1076 return 0; 1077} 1078/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1079ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 1080 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1081 I = ObjCImpls.find(D); 1082 if (I != ObjCImpls.end()) 1083 return cast<ObjCCategoryImplDecl>(I->second); 1084 return 0; 1085} 1086 1087/// \brief Set the implementation of ObjCInterfaceDecl. 1088void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1089 ObjCImplementationDecl *ImplD) { 1090 assert(IFaceD && ImplD && "Passed null params"); 1091 ObjCImpls[IFaceD] = ImplD; 1092} 1093/// \brief Set the implementation of ObjCCategoryDecl. 1094void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 1095 ObjCCategoryImplDecl *ImplD) { 1096 assert(CatD && ImplD && "Passed null params"); 1097 ObjCImpls[CatD] = ImplD; 1098} 1099 1100/// \brief Get the copy initialization expression of VarDecl,or NULL if 1101/// none exists. 1102Expr *ASTContext::getBlockVarCopyInits(const VarDecl*VD) { 1103 assert(VD && "Passed null params"); 1104 assert(VD->hasAttr<BlocksAttr>() && 1105 "getBlockVarCopyInits - not __block var"); 1106 llvm::DenseMap<const VarDecl*, Expr*>::iterator 1107 I = BlockVarCopyInits.find(VD); 1108 return (I != BlockVarCopyInits.end()) ? cast<Expr>(I->second) : 0; 1109} 1110 1111/// \brief Set the copy inialization expression of a block var decl. 1112void ASTContext::setBlockVarCopyInits(VarDecl*VD, Expr* Init) { 1113 assert(VD && Init && "Passed null params"); 1114 assert(VD->hasAttr<BlocksAttr>() && 1115 "setBlockVarCopyInits - not __block var"); 1116 BlockVarCopyInits[VD] = Init; 1117} 1118 1119/// \brief Allocate an uninitialized TypeSourceInfo. 1120/// 1121/// The caller should initialize the memory held by TypeSourceInfo using 1122/// the TypeLoc wrappers. 1123/// 1124/// \param T the type that will be the basis for type source info. This type 1125/// should refer to how the declarator was written in source code, not to 1126/// what type semantic analysis resolved the declarator to. 1127TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 1128 unsigned DataSize) const { 1129 if (!DataSize) 1130 DataSize = TypeLoc::getFullDataSizeForType(T); 1131 else 1132 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 1133 "incorrect data size provided to CreateTypeSourceInfo!"); 1134 1135 TypeSourceInfo *TInfo = 1136 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 1137 new (TInfo) TypeSourceInfo(T); 1138 return TInfo; 1139} 1140 1141TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1142 SourceLocation L) const { 1143 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1144 DI->getTypeLoc().initialize(const_cast<ASTContext &>(*this), L); 1145 return DI; 1146} 1147 1148const ASTRecordLayout & 1149ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) const { 1150 return getObjCLayout(D, 0); 1151} 1152 1153const ASTRecordLayout & 1154ASTContext::getASTObjCImplementationLayout( 1155 const ObjCImplementationDecl *D) const { 1156 return getObjCLayout(D->getClassInterface(), D); 1157} 1158 1159//===----------------------------------------------------------------------===// 1160// Type creation/memoization methods 1161//===----------------------------------------------------------------------===// 1162 1163QualType 1164ASTContext::getExtQualType(const Type *baseType, Qualifiers quals) const { 1165 unsigned fastQuals = quals.getFastQualifiers(); 1166 quals.removeFastQualifiers(); 1167 1168 // Check if we've already instantiated this type. 1169 llvm::FoldingSetNodeID ID; 1170 ExtQuals::Profile(ID, baseType, quals); 1171 void *insertPos = 0; 1172 if (ExtQuals *eq = ExtQualNodes.FindNodeOrInsertPos(ID, insertPos)) { 1173 assert(eq->getQualifiers() == quals); 1174 return QualType(eq, fastQuals); 1175 } 1176 1177 // If the base type is not canonical, make the appropriate canonical type. 1178 QualType canon; 1179 if (!baseType->isCanonicalUnqualified()) { 1180 SplitQualType canonSplit = baseType->getCanonicalTypeInternal().split(); 1181 canonSplit.second.addConsistentQualifiers(quals); 1182 canon = getExtQualType(canonSplit.first, canonSplit.second); 1183 1184 // Re-find the insert position. 1185 (void) ExtQualNodes.FindNodeOrInsertPos(ID, insertPos); 1186 } 1187 1188 ExtQuals *eq = new (*this, TypeAlignment) ExtQuals(baseType, canon, quals); 1189 ExtQualNodes.InsertNode(eq, insertPos); 1190 return QualType(eq, fastQuals); 1191} 1192 1193QualType 1194ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) const { 1195 QualType CanT = getCanonicalType(T); 1196 if (CanT.getAddressSpace() == AddressSpace) 1197 return T; 1198 1199 // If we are composing extended qualifiers together, merge together 1200 // into one ExtQuals node. 1201 QualifierCollector Quals; 1202 const Type *TypeNode = Quals.strip(T); 1203 1204 // If this type already has an address space specified, it cannot get 1205 // another one. 1206 assert(!Quals.hasAddressSpace() && 1207 "Type cannot be in multiple addr spaces!"); 1208 Quals.addAddressSpace(AddressSpace); 1209 1210 return getExtQualType(TypeNode, Quals); 1211} 1212 1213QualType ASTContext::getObjCGCQualType(QualType T, 1214 Qualifiers::GC GCAttr) const { 1215 QualType CanT = getCanonicalType(T); 1216 if (CanT.getObjCGCAttr() == GCAttr) 1217 return T; 1218 1219 if (const PointerType *ptr = T->getAs<PointerType>()) { 1220 QualType Pointee = ptr->getPointeeType(); 1221 if (Pointee->isAnyPointerType()) { 1222 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1223 return getPointerType(ResultType); 1224 } 1225 } 1226 1227 // If we are composing extended qualifiers together, merge together 1228 // into one ExtQuals node. 1229 QualifierCollector Quals; 1230 const Type *TypeNode = Quals.strip(T); 1231 1232 // If this type already has an ObjCGC specified, it cannot get 1233 // another one. 1234 assert(!Quals.hasObjCGCAttr() && 1235 "Type cannot have multiple ObjCGCs!"); 1236 Quals.addObjCGCAttr(GCAttr); 1237 1238 return getExtQualType(TypeNode, Quals); 1239} 1240 1241const FunctionType *ASTContext::adjustFunctionType(const FunctionType *T, 1242 FunctionType::ExtInfo Info) { 1243 if (T->getExtInfo() == Info) 1244 return T; 1245 1246 QualType Result; 1247 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(T)) { 1248 Result = getFunctionNoProtoType(FNPT->getResultType(), Info); 1249 } else { 1250 const FunctionProtoType *FPT = cast<FunctionProtoType>(T); 1251 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 1252 EPI.ExtInfo = Info; 1253 Result = getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1254 FPT->getNumArgs(), EPI); 1255 } 1256 1257 return cast<FunctionType>(Result.getTypePtr()); 1258} 1259 1260/// getComplexType - Return the uniqued reference to the type for a complex 1261/// number with the specified element type. 1262QualType ASTContext::getComplexType(QualType T) const { 1263 // Unique pointers, to guarantee there is only one pointer of a particular 1264 // structure. 1265 llvm::FoldingSetNodeID ID; 1266 ComplexType::Profile(ID, T); 1267 1268 void *InsertPos = 0; 1269 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1270 return QualType(CT, 0); 1271 1272 // If the pointee type isn't canonical, this won't be a canonical type either, 1273 // so fill in the canonical type field. 1274 QualType Canonical; 1275 if (!T.isCanonical()) { 1276 Canonical = getComplexType(getCanonicalType(T)); 1277 1278 // Get the new insert position for the node we care about. 1279 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1280 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1281 } 1282 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1283 Types.push_back(New); 1284 ComplexTypes.InsertNode(New, InsertPos); 1285 return QualType(New, 0); 1286} 1287 1288/// getPointerType - Return the uniqued reference to the type for a pointer to 1289/// the specified type. 1290QualType ASTContext::getPointerType(QualType T) const { 1291 // Unique pointers, to guarantee there is only one pointer of a particular 1292 // structure. 1293 llvm::FoldingSetNodeID ID; 1294 PointerType::Profile(ID, T); 1295 1296 void *InsertPos = 0; 1297 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1298 return QualType(PT, 0); 1299 1300 // If the pointee type isn't canonical, this won't be a canonical type either, 1301 // so fill in the canonical type field. 1302 QualType Canonical; 1303 if (!T.isCanonical()) { 1304 Canonical = getPointerType(getCanonicalType(T)); 1305 1306 // Get the new insert position for the node we care about. 1307 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1308 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1309 } 1310 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1311 Types.push_back(New); 1312 PointerTypes.InsertNode(New, InsertPos); 1313 return QualType(New, 0); 1314} 1315 1316/// getBlockPointerType - Return the uniqued reference to the type for 1317/// a pointer to the specified block. 1318QualType ASTContext::getBlockPointerType(QualType T) const { 1319 assert(T->isFunctionType() && "block of function types only"); 1320 // Unique pointers, to guarantee there is only one block of a particular 1321 // structure. 1322 llvm::FoldingSetNodeID ID; 1323 BlockPointerType::Profile(ID, T); 1324 1325 void *InsertPos = 0; 1326 if (BlockPointerType *PT = 1327 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1328 return QualType(PT, 0); 1329 1330 // If the block pointee type isn't canonical, this won't be a canonical 1331 // type either so fill in the canonical type field. 1332 QualType Canonical; 1333 if (!T.isCanonical()) { 1334 Canonical = getBlockPointerType(getCanonicalType(T)); 1335 1336 // Get the new insert position for the node we care about. 1337 BlockPointerType *NewIP = 1338 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1339 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1340 } 1341 BlockPointerType *New 1342 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1343 Types.push_back(New); 1344 BlockPointerTypes.InsertNode(New, InsertPos); 1345 return QualType(New, 0); 1346} 1347 1348/// getLValueReferenceType - Return the uniqued reference to the type for an 1349/// lvalue reference to the specified type. 1350QualType 1351ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) const { 1352 // Unique pointers, to guarantee there is only one pointer of a particular 1353 // structure. 1354 llvm::FoldingSetNodeID ID; 1355 ReferenceType::Profile(ID, T, SpelledAsLValue); 1356 1357 void *InsertPos = 0; 1358 if (LValueReferenceType *RT = 1359 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1360 return QualType(RT, 0); 1361 1362 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1363 1364 // If the referencee type isn't canonical, this won't be a canonical type 1365 // either, so fill in the canonical type field. 1366 QualType Canonical; 1367 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1368 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1369 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1370 1371 // Get the new insert position for the node we care about. 1372 LValueReferenceType *NewIP = 1373 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1374 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1375 } 1376 1377 LValueReferenceType *New 1378 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1379 SpelledAsLValue); 1380 Types.push_back(New); 1381 LValueReferenceTypes.InsertNode(New, InsertPos); 1382 1383 return QualType(New, 0); 1384} 1385 1386/// getRValueReferenceType - Return the uniqued reference to the type for an 1387/// rvalue reference to the specified type. 1388QualType ASTContext::getRValueReferenceType(QualType T) const { 1389 // Unique pointers, to guarantee there is only one pointer of a particular 1390 // structure. 1391 llvm::FoldingSetNodeID ID; 1392 ReferenceType::Profile(ID, T, false); 1393 1394 void *InsertPos = 0; 1395 if (RValueReferenceType *RT = 1396 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1397 return QualType(RT, 0); 1398 1399 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1400 1401 // If the referencee type isn't canonical, this won't be a canonical type 1402 // either, so fill in the canonical type field. 1403 QualType Canonical; 1404 if (InnerRef || !T.isCanonical()) { 1405 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1406 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1407 1408 // Get the new insert position for the node we care about. 1409 RValueReferenceType *NewIP = 1410 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1411 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1412 } 1413 1414 RValueReferenceType *New 1415 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1416 Types.push_back(New); 1417 RValueReferenceTypes.InsertNode(New, InsertPos); 1418 return QualType(New, 0); 1419} 1420 1421/// getMemberPointerType - Return the uniqued reference to the type for a 1422/// member pointer to the specified type, in the specified class. 1423QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) const { 1424 // Unique pointers, to guarantee there is only one pointer of a particular 1425 // structure. 1426 llvm::FoldingSetNodeID ID; 1427 MemberPointerType::Profile(ID, T, Cls); 1428 1429 void *InsertPos = 0; 1430 if (MemberPointerType *PT = 1431 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1432 return QualType(PT, 0); 1433 1434 // If the pointee or class type isn't canonical, this won't be a canonical 1435 // type either, so fill in the canonical type field. 1436 QualType Canonical; 1437 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1438 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1439 1440 // Get the new insert position for the node we care about. 1441 MemberPointerType *NewIP = 1442 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1443 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1444 } 1445 MemberPointerType *New 1446 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1447 Types.push_back(New); 1448 MemberPointerTypes.InsertNode(New, InsertPos); 1449 return QualType(New, 0); 1450} 1451 1452/// getConstantArrayType - Return the unique reference to the type for an 1453/// array of the specified element type. 1454QualType ASTContext::getConstantArrayType(QualType EltTy, 1455 const llvm::APInt &ArySizeIn, 1456 ArrayType::ArraySizeModifier ASM, 1457 unsigned IndexTypeQuals) const { 1458 assert((EltTy->isDependentType() || 1459 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1460 "Constant array of VLAs is illegal!"); 1461 1462 // Convert the array size into a canonical width matching the pointer size for 1463 // the target. 1464 llvm::APInt ArySize(ArySizeIn); 1465 ArySize = 1466 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1467 1468 llvm::FoldingSetNodeID ID; 1469 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, IndexTypeQuals); 1470 1471 void *InsertPos = 0; 1472 if (ConstantArrayType *ATP = 1473 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1474 return QualType(ATP, 0); 1475 1476 // If the element type isn't canonical or has qualifiers, this won't 1477 // be a canonical type either, so fill in the canonical type field. 1478 QualType Canon; 1479 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1480 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1481 Canon = getConstantArrayType(QualType(canonSplit.first, 0), ArySize, 1482 ASM, IndexTypeQuals); 1483 Canon = getQualifiedType(Canon, canonSplit.second); 1484 1485 // Get the new insert position for the node we care about. 1486 ConstantArrayType *NewIP = 1487 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1488 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1489 } 1490 1491 ConstantArrayType *New = new(*this,TypeAlignment) 1492 ConstantArrayType(EltTy, Canon, ArySize, ASM, IndexTypeQuals); 1493 ConstantArrayTypes.InsertNode(New, InsertPos); 1494 Types.push_back(New); 1495 return QualType(New, 0); 1496} 1497 1498/// getVariableArrayDecayedType - Turns the given type, which may be 1499/// variably-modified, into the corresponding type with all the known 1500/// sizes replaced with [*]. 1501QualType ASTContext::getVariableArrayDecayedType(QualType type) const { 1502 // Vastly most common case. 1503 if (!type->isVariablyModifiedType()) return type; 1504 1505 QualType result; 1506 1507 SplitQualType split = type.getSplitDesugaredType(); 1508 const Type *ty = split.first; 1509 switch (ty->getTypeClass()) { 1510#define TYPE(Class, Base) 1511#define ABSTRACT_TYPE(Class, Base) 1512#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 1513#include "clang/AST/TypeNodes.def" 1514 llvm_unreachable("didn't desugar past all non-canonical types?"); 1515 1516 // These types should never be variably-modified. 1517 case Type::Builtin: 1518 case Type::Complex: 1519 case Type::Vector: 1520 case Type::ExtVector: 1521 case Type::DependentSizedExtVector: 1522 case Type::ObjCObject: 1523 case Type::ObjCInterface: 1524 case Type::ObjCObjectPointer: 1525 case Type::Record: 1526 case Type::Enum: 1527 case Type::UnresolvedUsing: 1528 case Type::TypeOfExpr: 1529 case Type::TypeOf: 1530 case Type::Decltype: 1531 case Type::DependentName: 1532 case Type::InjectedClassName: 1533 case Type::TemplateSpecialization: 1534 case Type::DependentTemplateSpecialization: 1535 case Type::TemplateTypeParm: 1536 case Type::SubstTemplateTypeParmPack: 1537 case Type::Auto: 1538 case Type::PackExpansion: 1539 llvm_unreachable("type should never be variably-modified"); 1540 1541 // These types can be variably-modified but should never need to 1542 // further decay. 1543 case Type::FunctionNoProto: 1544 case Type::FunctionProto: 1545 case Type::BlockPointer: 1546 case Type::MemberPointer: 1547 return type; 1548 1549 // These types can be variably-modified. All these modifications 1550 // preserve structure except as noted by comments. 1551 // TODO: if we ever care about optimizing VLAs, there are no-op 1552 // optimizations available here. 1553 case Type::Pointer: 1554 result = getPointerType(getVariableArrayDecayedType( 1555 cast<PointerType>(ty)->getPointeeType())); 1556 break; 1557 1558 case Type::LValueReference: { 1559 const LValueReferenceType *lv = cast<LValueReferenceType>(ty); 1560 result = getLValueReferenceType( 1561 getVariableArrayDecayedType(lv->getPointeeType()), 1562 lv->isSpelledAsLValue()); 1563 break; 1564 } 1565 1566 case Type::RValueReference: { 1567 const RValueReferenceType *lv = cast<RValueReferenceType>(ty); 1568 result = getRValueReferenceType( 1569 getVariableArrayDecayedType(lv->getPointeeType())); 1570 break; 1571 } 1572 1573 case Type::ConstantArray: { 1574 const ConstantArrayType *cat = cast<ConstantArrayType>(ty); 1575 result = getConstantArrayType( 1576 getVariableArrayDecayedType(cat->getElementType()), 1577 cat->getSize(), 1578 cat->getSizeModifier(), 1579 cat->getIndexTypeCVRQualifiers()); 1580 break; 1581 } 1582 1583 case Type::DependentSizedArray: { 1584 const DependentSizedArrayType *dat = cast<DependentSizedArrayType>(ty); 1585 result = getDependentSizedArrayType( 1586 getVariableArrayDecayedType(dat->getElementType()), 1587 dat->getSizeExpr(), 1588 dat->getSizeModifier(), 1589 dat->getIndexTypeCVRQualifiers(), 1590 dat->getBracketsRange()); 1591 break; 1592 } 1593 1594 // Turn incomplete types into [*] types. 1595 case Type::IncompleteArray: { 1596 const IncompleteArrayType *iat = cast<IncompleteArrayType>(ty); 1597 result = getVariableArrayType( 1598 getVariableArrayDecayedType(iat->getElementType()), 1599 /*size*/ 0, 1600 ArrayType::Normal, 1601 iat->getIndexTypeCVRQualifiers(), 1602 SourceRange()); 1603 break; 1604 } 1605 1606 // Turn VLA types into [*] types. 1607 case Type::VariableArray: { 1608 const VariableArrayType *vat = cast<VariableArrayType>(ty); 1609 result = getVariableArrayType( 1610 getVariableArrayDecayedType(vat->getElementType()), 1611 /*size*/ 0, 1612 ArrayType::Star, 1613 vat->getIndexTypeCVRQualifiers(), 1614 vat->getBracketsRange()); 1615 break; 1616 } 1617 } 1618 1619 // Apply the top-level qualifiers from the original. 1620 return getQualifiedType(result, split.second); 1621} 1622 1623/// getVariableArrayType - Returns a non-unique reference to the type for a 1624/// variable array of the specified element type. 1625QualType ASTContext::getVariableArrayType(QualType EltTy, 1626 Expr *NumElts, 1627 ArrayType::ArraySizeModifier ASM, 1628 unsigned IndexTypeQuals, 1629 SourceRange Brackets) const { 1630 // Since we don't unique expressions, it isn't possible to unique VLA's 1631 // that have an expression provided for their size. 1632 QualType Canon; 1633 1634 // Be sure to pull qualifiers off the element type. 1635 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1636 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1637 Canon = getVariableArrayType(QualType(canonSplit.first, 0), NumElts, ASM, 1638 IndexTypeQuals, Brackets); 1639 Canon = getQualifiedType(Canon, canonSplit.second); 1640 } 1641 1642 VariableArrayType *New = new(*this, TypeAlignment) 1643 VariableArrayType(EltTy, Canon, NumElts, ASM, IndexTypeQuals, Brackets); 1644 1645 VariableArrayTypes.push_back(New); 1646 Types.push_back(New); 1647 return QualType(New, 0); 1648} 1649 1650/// getDependentSizedArrayType - Returns a non-unique reference to 1651/// the type for a dependently-sized array of the specified element 1652/// type. 1653QualType ASTContext::getDependentSizedArrayType(QualType elementType, 1654 Expr *numElements, 1655 ArrayType::ArraySizeModifier ASM, 1656 unsigned elementTypeQuals, 1657 SourceRange brackets) const { 1658 assert((!numElements || numElements->isTypeDependent() || 1659 numElements->isValueDependent()) && 1660 "Size must be type- or value-dependent!"); 1661 1662 // Dependently-sized array types that do not have a specified number 1663 // of elements will have their sizes deduced from a dependent 1664 // initializer. We do no canonicalization here at all, which is okay 1665 // because they can't be used in most locations. 1666 if (!numElements) { 1667 DependentSizedArrayType *newType 1668 = new (*this, TypeAlignment) 1669 DependentSizedArrayType(*this, elementType, QualType(), 1670 numElements, ASM, elementTypeQuals, 1671 brackets); 1672 Types.push_back(newType); 1673 return QualType(newType, 0); 1674 } 1675 1676 // Otherwise, we actually build a new type every time, but we 1677 // also build a canonical type. 1678 1679 SplitQualType canonElementType = getCanonicalType(elementType).split(); 1680 1681 void *insertPos = 0; 1682 llvm::FoldingSetNodeID ID; 1683 DependentSizedArrayType::Profile(ID, *this, 1684 QualType(canonElementType.first, 0), 1685 ASM, elementTypeQuals, numElements); 1686 1687 // Look for an existing type with these properties. 1688 DependentSizedArrayType *canonTy = 1689 DependentSizedArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1690 1691 // If we don't have one, build one. 1692 if (!canonTy) { 1693 canonTy = new (*this, TypeAlignment) 1694 DependentSizedArrayType(*this, QualType(canonElementType.first, 0), 1695 QualType(), numElements, ASM, elementTypeQuals, 1696 brackets); 1697 DependentSizedArrayTypes.InsertNode(canonTy, insertPos); 1698 Types.push_back(canonTy); 1699 } 1700 1701 // Apply qualifiers from the element type to the array. 1702 QualType canon = getQualifiedType(QualType(canonTy,0), 1703 canonElementType.second); 1704 1705 // If we didn't need extra canonicalization for the element type, 1706 // then just use that as our result. 1707 if (QualType(canonElementType.first, 0) == elementType) 1708 return canon; 1709 1710 // Otherwise, we need to build a type which follows the spelling 1711 // of the element type. 1712 DependentSizedArrayType *sugaredType 1713 = new (*this, TypeAlignment) 1714 DependentSizedArrayType(*this, elementType, canon, numElements, 1715 ASM, elementTypeQuals, brackets); 1716 Types.push_back(sugaredType); 1717 return QualType(sugaredType, 0); 1718} 1719 1720QualType ASTContext::getIncompleteArrayType(QualType elementType, 1721 ArrayType::ArraySizeModifier ASM, 1722 unsigned elementTypeQuals) const { 1723 llvm::FoldingSetNodeID ID; 1724 IncompleteArrayType::Profile(ID, elementType, ASM, elementTypeQuals); 1725 1726 void *insertPos = 0; 1727 if (IncompleteArrayType *iat = 1728 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos)) 1729 return QualType(iat, 0); 1730 1731 // If the element type isn't canonical, this won't be a canonical type 1732 // either, so fill in the canonical type field. We also have to pull 1733 // qualifiers off the element type. 1734 QualType canon; 1735 1736 if (!elementType.isCanonical() || elementType.hasLocalQualifiers()) { 1737 SplitQualType canonSplit = getCanonicalType(elementType).split(); 1738 canon = getIncompleteArrayType(QualType(canonSplit.first, 0), 1739 ASM, elementTypeQuals); 1740 canon = getQualifiedType(canon, canonSplit.second); 1741 1742 // Get the new insert position for the node we care about. 1743 IncompleteArrayType *existing = 1744 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1745 assert(!existing && "Shouldn't be in the map!"); (void) existing; 1746 } 1747 1748 IncompleteArrayType *newType = new (*this, TypeAlignment) 1749 IncompleteArrayType(elementType, canon, ASM, elementTypeQuals); 1750 1751 IncompleteArrayTypes.InsertNode(newType, insertPos); 1752 Types.push_back(newType); 1753 return QualType(newType, 0); 1754} 1755 1756/// getVectorType - Return the unique reference to a vector type of 1757/// the specified element type and size. VectorType must be a built-in type. 1758QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1759 VectorType::VectorKind VecKind) const { 1760 assert(vecType->isBuiltinType()); 1761 1762 // Check if we've already instantiated a vector of this type. 1763 llvm::FoldingSetNodeID ID; 1764 VectorType::Profile(ID, vecType, NumElts, Type::Vector, VecKind); 1765 1766 void *InsertPos = 0; 1767 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1768 return QualType(VTP, 0); 1769 1770 // If the element type isn't canonical, this won't be a canonical type either, 1771 // so fill in the canonical type field. 1772 QualType Canonical; 1773 if (!vecType.isCanonical()) { 1774 Canonical = getVectorType(getCanonicalType(vecType), NumElts, VecKind); 1775 1776 // Get the new insert position for the node we care about. 1777 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1778 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1779 } 1780 VectorType *New = new (*this, TypeAlignment) 1781 VectorType(vecType, NumElts, Canonical, VecKind); 1782 VectorTypes.InsertNode(New, InsertPos); 1783 Types.push_back(New); 1784 return QualType(New, 0); 1785} 1786 1787/// getExtVectorType - Return the unique reference to an extended vector type of 1788/// the specified element type and size. VectorType must be a built-in type. 1789QualType 1790ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) const { 1791 assert(vecType->isBuiltinType()); 1792 1793 // Check if we've already instantiated a vector of this type. 1794 llvm::FoldingSetNodeID ID; 1795 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, 1796 VectorType::GenericVector); 1797 void *InsertPos = 0; 1798 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1799 return QualType(VTP, 0); 1800 1801 // If the element type isn't canonical, this won't be a canonical type either, 1802 // so fill in the canonical type field. 1803 QualType Canonical; 1804 if (!vecType.isCanonical()) { 1805 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1806 1807 // Get the new insert position for the node we care about. 1808 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1809 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1810 } 1811 ExtVectorType *New = new (*this, TypeAlignment) 1812 ExtVectorType(vecType, NumElts, Canonical); 1813 VectorTypes.InsertNode(New, InsertPos); 1814 Types.push_back(New); 1815 return QualType(New, 0); 1816} 1817 1818QualType 1819ASTContext::getDependentSizedExtVectorType(QualType vecType, 1820 Expr *SizeExpr, 1821 SourceLocation AttrLoc) const { 1822 llvm::FoldingSetNodeID ID; 1823 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1824 SizeExpr); 1825 1826 void *InsertPos = 0; 1827 DependentSizedExtVectorType *Canon 1828 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1829 DependentSizedExtVectorType *New; 1830 if (Canon) { 1831 // We already have a canonical version of this array type; use it as 1832 // the canonical type for a newly-built type. 1833 New = new (*this, TypeAlignment) 1834 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1835 SizeExpr, AttrLoc); 1836 } else { 1837 QualType CanonVecTy = getCanonicalType(vecType); 1838 if (CanonVecTy == vecType) { 1839 New = new (*this, TypeAlignment) 1840 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1841 AttrLoc); 1842 1843 DependentSizedExtVectorType *CanonCheck 1844 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1845 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1846 (void)CanonCheck; 1847 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1848 } else { 1849 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1850 SourceLocation()); 1851 New = new (*this, TypeAlignment) 1852 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1853 } 1854 } 1855 1856 Types.push_back(New); 1857 return QualType(New, 0); 1858} 1859 1860/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1861/// 1862QualType 1863ASTContext::getFunctionNoProtoType(QualType ResultTy, 1864 const FunctionType::ExtInfo &Info) const { 1865 const CallingConv DefaultCC = Info.getCC(); 1866 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 1867 CC_X86StdCall : DefaultCC; 1868 // Unique functions, to guarantee there is only one function of a particular 1869 // structure. 1870 llvm::FoldingSetNodeID ID; 1871 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1872 1873 void *InsertPos = 0; 1874 if (FunctionNoProtoType *FT = 1875 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1876 return QualType(FT, 0); 1877 1878 QualType Canonical; 1879 if (!ResultTy.isCanonical() || 1880 getCanonicalCallConv(CallConv) != CallConv) { 1881 Canonical = 1882 getFunctionNoProtoType(getCanonicalType(ResultTy), 1883 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1884 1885 // Get the new insert position for the node we care about. 1886 FunctionNoProtoType *NewIP = 1887 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1888 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1889 } 1890 1891 FunctionProtoType::ExtInfo newInfo = Info.withCallingConv(CallConv); 1892 FunctionNoProtoType *New = new (*this, TypeAlignment) 1893 FunctionNoProtoType(ResultTy, Canonical, newInfo); 1894 Types.push_back(New); 1895 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1896 return QualType(New, 0); 1897} 1898 1899/// getFunctionType - Return a normal function type with a typed argument 1900/// list. isVariadic indicates whether the argument list includes '...'. 1901QualType 1902ASTContext::getFunctionType(QualType ResultTy, 1903 const QualType *ArgArray, unsigned NumArgs, 1904 const FunctionProtoType::ExtProtoInfo &EPI) const { 1905 // Unique functions, to guarantee there is only one function of a particular 1906 // structure. 1907 llvm::FoldingSetNodeID ID; 1908 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, EPI); 1909 1910 void *InsertPos = 0; 1911 if (FunctionProtoType *FTP = 1912 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1913 return QualType(FTP, 0); 1914 1915 // Determine whether the type being created is already canonical or not. 1916 bool isCanonical = !EPI.HasExceptionSpec && ResultTy.isCanonical(); 1917 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1918 if (!ArgArray[i].isCanonicalAsParam()) 1919 isCanonical = false; 1920 1921 const CallingConv DefaultCC = EPI.ExtInfo.getCC(); 1922 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 1923 CC_X86StdCall : DefaultCC; 1924 1925 // If this type isn't canonical, get the canonical version of it. 1926 // The exception spec is not part of the canonical type. 1927 QualType Canonical; 1928 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1929 llvm::SmallVector<QualType, 16> CanonicalArgs; 1930 CanonicalArgs.reserve(NumArgs); 1931 for (unsigned i = 0; i != NumArgs; ++i) 1932 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1933 1934 FunctionProtoType::ExtProtoInfo CanonicalEPI = EPI; 1935 if (CanonicalEPI.HasExceptionSpec) { 1936 CanonicalEPI.HasExceptionSpec = false; 1937 CanonicalEPI.HasAnyExceptionSpec = false; 1938 CanonicalEPI.NumExceptions = 0; 1939 } 1940 CanonicalEPI.ExtInfo 1941 = CanonicalEPI.ExtInfo.withCallingConv(getCanonicalCallConv(CallConv)); 1942 1943 Canonical = getFunctionType(getCanonicalType(ResultTy), 1944 CanonicalArgs.data(), NumArgs, 1945 CanonicalEPI); 1946 1947 // Get the new insert position for the node we care about. 1948 FunctionProtoType *NewIP = 1949 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1950 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1951 } 1952 1953 // FunctionProtoType objects are allocated with extra bytes after them 1954 // for two variable size arrays (for parameter and exception types) at the 1955 // end of them. 1956 size_t Size = sizeof(FunctionProtoType) + 1957 NumArgs * sizeof(QualType) + 1958 EPI.NumExceptions * sizeof(QualType); 1959 FunctionProtoType *FTP = (FunctionProtoType*) Allocate(Size, TypeAlignment); 1960 FunctionProtoType::ExtProtoInfo newEPI = EPI; 1961 newEPI.ExtInfo = EPI.ExtInfo.withCallingConv(CallConv); 1962 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, Canonical, newEPI); 1963 Types.push_back(FTP); 1964 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1965 return QualType(FTP, 0); 1966} 1967 1968#ifndef NDEBUG 1969static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1970 if (!isa<CXXRecordDecl>(D)) return false; 1971 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1972 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1973 return true; 1974 if (RD->getDescribedClassTemplate() && 1975 !isa<ClassTemplateSpecializationDecl>(RD)) 1976 return true; 1977 return false; 1978} 1979#endif 1980 1981/// getInjectedClassNameType - Return the unique reference to the 1982/// injected class name type for the specified templated declaration. 1983QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1984 QualType TST) const { 1985 assert(NeedsInjectedClassNameType(Decl)); 1986 if (Decl->TypeForDecl) { 1987 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1988 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDeclaration()) { 1989 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1990 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1991 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1992 } else { 1993 Type *newType = 1994 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 1995 Decl->TypeForDecl = newType; 1996 Types.push_back(newType); 1997 } 1998 return QualType(Decl->TypeForDecl, 0); 1999} 2000 2001/// getTypeDeclType - Return the unique reference to the type for the 2002/// specified type declaration. 2003QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) const { 2004 assert(Decl && "Passed null for Decl param"); 2005 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 2006 2007 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 2008 return getTypedefType(Typedef); 2009 2010 assert(!isa<TemplateTypeParmDecl>(Decl) && 2011 "Template type parameter types are always available."); 2012 2013 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 2014 assert(!Record->getPreviousDeclaration() && 2015 "struct/union has previous declaration"); 2016 assert(!NeedsInjectedClassNameType(Record)); 2017 return getRecordType(Record); 2018 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 2019 assert(!Enum->getPreviousDeclaration() && 2020 "enum has previous declaration"); 2021 return getEnumType(Enum); 2022 } else if (const UnresolvedUsingTypenameDecl *Using = 2023 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 2024 Type *newType = new (*this, TypeAlignment) UnresolvedUsingType(Using); 2025 Decl->TypeForDecl = newType; 2026 Types.push_back(newType); 2027 } else 2028 llvm_unreachable("TypeDecl without a type?"); 2029 2030 return QualType(Decl->TypeForDecl, 0); 2031} 2032 2033/// getTypedefType - Return the unique reference to the type for the 2034/// specified typename decl. 2035QualType 2036ASTContext::getTypedefType(const TypedefDecl *Decl, QualType Canonical) const { 2037 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2038 2039 if (Canonical.isNull()) 2040 Canonical = getCanonicalType(Decl->getUnderlyingType()); 2041 TypedefType *newType = new(*this, TypeAlignment) 2042 TypedefType(Type::Typedef, Decl, Canonical); 2043 Decl->TypeForDecl = newType; 2044 Types.push_back(newType); 2045 return QualType(newType, 0); 2046} 2047 2048QualType ASTContext::getRecordType(const RecordDecl *Decl) const { 2049 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2050 2051 if (const RecordDecl *PrevDecl = Decl->getPreviousDeclaration()) 2052 if (PrevDecl->TypeForDecl) 2053 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2054 2055 RecordType *newType = new (*this, TypeAlignment) RecordType(Decl); 2056 Decl->TypeForDecl = newType; 2057 Types.push_back(newType); 2058 return QualType(newType, 0); 2059} 2060 2061QualType ASTContext::getEnumType(const EnumDecl *Decl) const { 2062 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2063 2064 if (const EnumDecl *PrevDecl = Decl->getPreviousDeclaration()) 2065 if (PrevDecl->TypeForDecl) 2066 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2067 2068 EnumType *newType = new (*this, TypeAlignment) EnumType(Decl); 2069 Decl->TypeForDecl = newType; 2070 Types.push_back(newType); 2071 return QualType(newType, 0); 2072} 2073 2074QualType ASTContext::getAttributedType(AttributedType::Kind attrKind, 2075 QualType modifiedType, 2076 QualType equivalentType) { 2077 llvm::FoldingSetNodeID id; 2078 AttributedType::Profile(id, attrKind, modifiedType, equivalentType); 2079 2080 void *insertPos = 0; 2081 AttributedType *type = AttributedTypes.FindNodeOrInsertPos(id, insertPos); 2082 if (type) return QualType(type, 0); 2083 2084 QualType canon = getCanonicalType(equivalentType); 2085 type = new (*this, TypeAlignment) 2086 AttributedType(canon, attrKind, modifiedType, equivalentType); 2087 2088 Types.push_back(type); 2089 AttributedTypes.InsertNode(type, insertPos); 2090 2091 return QualType(type, 0); 2092} 2093 2094 2095/// \brief Retrieve a substitution-result type. 2096QualType 2097ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 2098 QualType Replacement) const { 2099 assert(Replacement.isCanonical() 2100 && "replacement types must always be canonical"); 2101 2102 llvm::FoldingSetNodeID ID; 2103 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 2104 void *InsertPos = 0; 2105 SubstTemplateTypeParmType *SubstParm 2106 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2107 2108 if (!SubstParm) { 2109 SubstParm = new (*this, TypeAlignment) 2110 SubstTemplateTypeParmType(Parm, Replacement); 2111 Types.push_back(SubstParm); 2112 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2113 } 2114 2115 return QualType(SubstParm, 0); 2116} 2117 2118/// \brief Retrieve a 2119QualType ASTContext::getSubstTemplateTypeParmPackType( 2120 const TemplateTypeParmType *Parm, 2121 const TemplateArgument &ArgPack) { 2122#ifndef NDEBUG 2123 for (TemplateArgument::pack_iterator P = ArgPack.pack_begin(), 2124 PEnd = ArgPack.pack_end(); 2125 P != PEnd; ++P) { 2126 assert(P->getKind() == TemplateArgument::Type &&"Pack contains a non-type"); 2127 assert(P->getAsType().isCanonical() && "Pack contains non-canonical type"); 2128 } 2129#endif 2130 2131 llvm::FoldingSetNodeID ID; 2132 SubstTemplateTypeParmPackType::Profile(ID, Parm, ArgPack); 2133 void *InsertPos = 0; 2134 if (SubstTemplateTypeParmPackType *SubstParm 2135 = SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos)) 2136 return QualType(SubstParm, 0); 2137 2138 QualType Canon; 2139 if (!Parm->isCanonicalUnqualified()) { 2140 Canon = getCanonicalType(QualType(Parm, 0)); 2141 Canon = getSubstTemplateTypeParmPackType(cast<TemplateTypeParmType>(Canon), 2142 ArgPack); 2143 SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos); 2144 } 2145 2146 SubstTemplateTypeParmPackType *SubstParm 2147 = new (*this, TypeAlignment) SubstTemplateTypeParmPackType(Parm, Canon, 2148 ArgPack); 2149 Types.push_back(SubstParm); 2150 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2151 return QualType(SubstParm, 0); 2152} 2153 2154/// \brief Retrieve the template type parameter type for a template 2155/// parameter or parameter pack with the given depth, index, and (optionally) 2156/// name. 2157QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 2158 bool ParameterPack, 2159 IdentifierInfo *Name) const { 2160 llvm::FoldingSetNodeID ID; 2161 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 2162 void *InsertPos = 0; 2163 TemplateTypeParmType *TypeParm 2164 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2165 2166 if (TypeParm) 2167 return QualType(TypeParm, 0); 2168 2169 if (Name) { 2170 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 2171 TypeParm = new (*this, TypeAlignment) 2172 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 2173 2174 TemplateTypeParmType *TypeCheck 2175 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2176 assert(!TypeCheck && "Template type parameter canonical type broken"); 2177 (void)TypeCheck; 2178 } else 2179 TypeParm = new (*this, TypeAlignment) 2180 TemplateTypeParmType(Depth, Index, ParameterPack); 2181 2182 Types.push_back(TypeParm); 2183 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 2184 2185 return QualType(TypeParm, 0); 2186} 2187 2188TypeSourceInfo * 2189ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 2190 SourceLocation NameLoc, 2191 const TemplateArgumentListInfo &Args, 2192 QualType CanonType) const { 2193 assert(!Name.getAsDependentTemplateName() && 2194 "No dependent template names here!"); 2195 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 2196 2197 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 2198 TemplateSpecializationTypeLoc TL 2199 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 2200 TL.setTemplateNameLoc(NameLoc); 2201 TL.setLAngleLoc(Args.getLAngleLoc()); 2202 TL.setRAngleLoc(Args.getRAngleLoc()); 2203 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 2204 TL.setArgLocInfo(i, Args[i].getLocInfo()); 2205 return DI; 2206} 2207 2208QualType 2209ASTContext::getTemplateSpecializationType(TemplateName Template, 2210 const TemplateArgumentListInfo &Args, 2211 QualType Canon) const { 2212 assert(!Template.getAsDependentTemplateName() && 2213 "No dependent template names here!"); 2214 2215 unsigned NumArgs = Args.size(); 2216 2217 llvm::SmallVector<TemplateArgument, 4> ArgVec; 2218 ArgVec.reserve(NumArgs); 2219 for (unsigned i = 0; i != NumArgs; ++i) 2220 ArgVec.push_back(Args[i].getArgument()); 2221 2222 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 2223 Canon); 2224} 2225 2226QualType 2227ASTContext::getTemplateSpecializationType(TemplateName Template, 2228 const TemplateArgument *Args, 2229 unsigned NumArgs, 2230 QualType Canon) const { 2231 assert(!Template.getAsDependentTemplateName() && 2232 "No dependent template names here!"); 2233 2234 if (!Canon.isNull()) 2235 Canon = getCanonicalType(Canon); 2236 else 2237 Canon = getCanonicalTemplateSpecializationType(Template, Args, NumArgs); 2238 2239 // Allocate the (non-canonical) template specialization type, but don't 2240 // try to unique it: these types typically have location information that 2241 // we don't unique and don't want to lose. 2242 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2243 sizeof(TemplateArgument) * NumArgs), 2244 TypeAlignment); 2245 TemplateSpecializationType *Spec 2246 = new (Mem) TemplateSpecializationType(Template, 2247 Args, NumArgs, 2248 Canon); 2249 2250 Types.push_back(Spec); 2251 return QualType(Spec, 0); 2252} 2253 2254QualType 2255ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template, 2256 const TemplateArgument *Args, 2257 unsigned NumArgs) const { 2258 assert(!Template.getAsDependentTemplateName() && 2259 "No dependent template names here!"); 2260 2261 // Build the canonical template specialization type. 2262 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 2263 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 2264 CanonArgs.reserve(NumArgs); 2265 for (unsigned I = 0; I != NumArgs; ++I) 2266 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 2267 2268 // Determine whether this canonical template specialization type already 2269 // exists. 2270 llvm::FoldingSetNodeID ID; 2271 TemplateSpecializationType::Profile(ID, CanonTemplate, 2272 CanonArgs.data(), NumArgs, *this); 2273 2274 void *InsertPos = 0; 2275 TemplateSpecializationType *Spec 2276 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2277 2278 if (!Spec) { 2279 // Allocate a new canonical template specialization type. 2280 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2281 sizeof(TemplateArgument) * NumArgs), 2282 TypeAlignment); 2283 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 2284 CanonArgs.data(), NumArgs, 2285 QualType()); 2286 Types.push_back(Spec); 2287 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 2288 } 2289 2290 assert(Spec->isDependentType() && 2291 "Non-dependent template-id type must have a canonical type"); 2292 return QualType(Spec, 0); 2293} 2294 2295QualType 2296ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 2297 NestedNameSpecifier *NNS, 2298 QualType NamedType) const { 2299 llvm::FoldingSetNodeID ID; 2300 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 2301 2302 void *InsertPos = 0; 2303 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2304 if (T) 2305 return QualType(T, 0); 2306 2307 QualType Canon = NamedType; 2308 if (!Canon.isCanonical()) { 2309 Canon = getCanonicalType(NamedType); 2310 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2311 assert(!CheckT && "Elaborated canonical type broken"); 2312 (void)CheckT; 2313 } 2314 2315 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 2316 Types.push_back(T); 2317 ElaboratedTypes.InsertNode(T, InsertPos); 2318 return QualType(T, 0); 2319} 2320 2321QualType 2322ASTContext::getParenType(QualType InnerType) const { 2323 llvm::FoldingSetNodeID ID; 2324 ParenType::Profile(ID, InnerType); 2325 2326 void *InsertPos = 0; 2327 ParenType *T = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2328 if (T) 2329 return QualType(T, 0); 2330 2331 QualType Canon = InnerType; 2332 if (!Canon.isCanonical()) { 2333 Canon = getCanonicalType(InnerType); 2334 ParenType *CheckT = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2335 assert(!CheckT && "Paren canonical type broken"); 2336 (void)CheckT; 2337 } 2338 2339 T = new (*this) ParenType(InnerType, Canon); 2340 Types.push_back(T); 2341 ParenTypes.InsertNode(T, InsertPos); 2342 return QualType(T, 0); 2343} 2344 2345QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 2346 NestedNameSpecifier *NNS, 2347 const IdentifierInfo *Name, 2348 QualType Canon) const { 2349 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2350 2351 if (Canon.isNull()) { 2352 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2353 ElaboratedTypeKeyword CanonKeyword = Keyword; 2354 if (Keyword == ETK_None) 2355 CanonKeyword = ETK_Typename; 2356 2357 if (CanonNNS != NNS || CanonKeyword != Keyword) 2358 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 2359 } 2360 2361 llvm::FoldingSetNodeID ID; 2362 DependentNameType::Profile(ID, Keyword, NNS, Name); 2363 2364 void *InsertPos = 0; 2365 DependentNameType *T 2366 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2367 if (T) 2368 return QualType(T, 0); 2369 2370 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 2371 Types.push_back(T); 2372 DependentNameTypes.InsertNode(T, InsertPos); 2373 return QualType(T, 0); 2374} 2375 2376QualType 2377ASTContext::getDependentTemplateSpecializationType( 2378 ElaboratedTypeKeyword Keyword, 2379 NestedNameSpecifier *NNS, 2380 const IdentifierInfo *Name, 2381 const TemplateArgumentListInfo &Args) const { 2382 // TODO: avoid this copy 2383 llvm::SmallVector<TemplateArgument, 16> ArgCopy; 2384 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2385 ArgCopy.push_back(Args[I].getArgument()); 2386 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2387 ArgCopy.size(), 2388 ArgCopy.data()); 2389} 2390 2391QualType 2392ASTContext::getDependentTemplateSpecializationType( 2393 ElaboratedTypeKeyword Keyword, 2394 NestedNameSpecifier *NNS, 2395 const IdentifierInfo *Name, 2396 unsigned NumArgs, 2397 const TemplateArgument *Args) const { 2398 assert((!NNS || NNS->isDependent()) && 2399 "nested-name-specifier must be dependent"); 2400 2401 llvm::FoldingSetNodeID ID; 2402 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2403 Name, NumArgs, Args); 2404 2405 void *InsertPos = 0; 2406 DependentTemplateSpecializationType *T 2407 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2408 if (T) 2409 return QualType(T, 0); 2410 2411 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2412 2413 ElaboratedTypeKeyword CanonKeyword = Keyword; 2414 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2415 2416 bool AnyNonCanonArgs = false; 2417 llvm::SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2418 for (unsigned I = 0; I != NumArgs; ++I) { 2419 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2420 if (!CanonArgs[I].structurallyEquals(Args[I])) 2421 AnyNonCanonArgs = true; 2422 } 2423 2424 QualType Canon; 2425 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2426 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2427 Name, NumArgs, 2428 CanonArgs.data()); 2429 2430 // Find the insert position again. 2431 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2432 } 2433 2434 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2435 sizeof(TemplateArgument) * NumArgs), 2436 TypeAlignment); 2437 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2438 Name, NumArgs, Args, Canon); 2439 Types.push_back(T); 2440 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2441 return QualType(T, 0); 2442} 2443 2444QualType ASTContext::getPackExpansionType(QualType Pattern, 2445 llvm::Optional<unsigned> NumExpansions) { 2446 llvm::FoldingSetNodeID ID; 2447 PackExpansionType::Profile(ID, Pattern, NumExpansions); 2448 2449 assert(Pattern->containsUnexpandedParameterPack() && 2450 "Pack expansions must expand one or more parameter packs"); 2451 void *InsertPos = 0; 2452 PackExpansionType *T 2453 = PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2454 if (T) 2455 return QualType(T, 0); 2456 2457 QualType Canon; 2458 if (!Pattern.isCanonical()) { 2459 Canon = getPackExpansionType(getCanonicalType(Pattern), NumExpansions); 2460 2461 // Find the insert position again. 2462 PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2463 } 2464 2465 T = new (*this) PackExpansionType(Pattern, Canon, NumExpansions); 2466 Types.push_back(T); 2467 PackExpansionTypes.InsertNode(T, InsertPos); 2468 return QualType(T, 0); 2469} 2470 2471/// CmpProtocolNames - Comparison predicate for sorting protocols 2472/// alphabetically. 2473static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2474 const ObjCProtocolDecl *RHS) { 2475 return LHS->getDeclName() < RHS->getDeclName(); 2476} 2477 2478static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2479 unsigned NumProtocols) { 2480 if (NumProtocols == 0) return true; 2481 2482 for (unsigned i = 1; i != NumProtocols; ++i) 2483 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2484 return false; 2485 return true; 2486} 2487 2488static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2489 unsigned &NumProtocols) { 2490 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2491 2492 // Sort protocols, keyed by name. 2493 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2494 2495 // Remove duplicates. 2496 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2497 NumProtocols = ProtocolsEnd-Protocols; 2498} 2499 2500QualType ASTContext::getObjCObjectType(QualType BaseType, 2501 ObjCProtocolDecl * const *Protocols, 2502 unsigned NumProtocols) const { 2503 // If the base type is an interface and there aren't any protocols 2504 // to add, then the interface type will do just fine. 2505 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2506 return BaseType; 2507 2508 // Look in the folding set for an existing type. 2509 llvm::FoldingSetNodeID ID; 2510 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2511 void *InsertPos = 0; 2512 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2513 return QualType(QT, 0); 2514 2515 // Build the canonical type, which has the canonical base type and 2516 // a sorted-and-uniqued list of protocols. 2517 QualType Canonical; 2518 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2519 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2520 if (!ProtocolsSorted) { 2521 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2522 Protocols + NumProtocols); 2523 unsigned UniqueCount = NumProtocols; 2524 2525 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2526 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2527 &Sorted[0], UniqueCount); 2528 } else { 2529 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2530 Protocols, NumProtocols); 2531 } 2532 2533 // Regenerate InsertPos. 2534 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2535 } 2536 2537 unsigned Size = sizeof(ObjCObjectTypeImpl); 2538 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2539 void *Mem = Allocate(Size, TypeAlignment); 2540 ObjCObjectTypeImpl *T = 2541 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2542 2543 Types.push_back(T); 2544 ObjCObjectTypes.InsertNode(T, InsertPos); 2545 return QualType(T, 0); 2546} 2547 2548/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2549/// the given object type. 2550QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) const { 2551 llvm::FoldingSetNodeID ID; 2552 ObjCObjectPointerType::Profile(ID, ObjectT); 2553 2554 void *InsertPos = 0; 2555 if (ObjCObjectPointerType *QT = 2556 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2557 return QualType(QT, 0); 2558 2559 // Find the canonical object type. 2560 QualType Canonical; 2561 if (!ObjectT.isCanonical()) { 2562 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2563 2564 // Regenerate InsertPos. 2565 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2566 } 2567 2568 // No match. 2569 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2570 ObjCObjectPointerType *QType = 2571 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2572 2573 Types.push_back(QType); 2574 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2575 return QualType(QType, 0); 2576} 2577 2578/// getObjCInterfaceType - Return the unique reference to the type for the 2579/// specified ObjC interface decl. The list of protocols is optional. 2580QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) const { 2581 if (Decl->TypeForDecl) 2582 return QualType(Decl->TypeForDecl, 0); 2583 2584 // FIXME: redeclarations? 2585 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2586 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2587 Decl->TypeForDecl = T; 2588 Types.push_back(T); 2589 return QualType(T, 0); 2590} 2591 2592/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2593/// TypeOfExprType AST's (since expression's are never shared). For example, 2594/// multiple declarations that refer to "typeof(x)" all contain different 2595/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2596/// on canonical type's (which are always unique). 2597QualType ASTContext::getTypeOfExprType(Expr *tofExpr) const { 2598 TypeOfExprType *toe; 2599 if (tofExpr->isTypeDependent()) { 2600 llvm::FoldingSetNodeID ID; 2601 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2602 2603 void *InsertPos = 0; 2604 DependentTypeOfExprType *Canon 2605 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2606 if (Canon) { 2607 // We already have a "canonical" version of an identical, dependent 2608 // typeof(expr) type. Use that as our canonical type. 2609 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2610 QualType((TypeOfExprType*)Canon, 0)); 2611 } 2612 else { 2613 // Build a new, canonical typeof(expr) type. 2614 Canon 2615 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2616 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2617 toe = Canon; 2618 } 2619 } else { 2620 QualType Canonical = getCanonicalType(tofExpr->getType()); 2621 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2622 } 2623 Types.push_back(toe); 2624 return QualType(toe, 0); 2625} 2626 2627/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2628/// TypeOfType AST's. The only motivation to unique these nodes would be 2629/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2630/// an issue. This doesn't effect the type checker, since it operates 2631/// on canonical type's (which are always unique). 2632QualType ASTContext::getTypeOfType(QualType tofType) const { 2633 QualType Canonical = getCanonicalType(tofType); 2634 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2635 Types.push_back(tot); 2636 return QualType(tot, 0); 2637} 2638 2639/// getDecltypeForExpr - Given an expr, will return the decltype for that 2640/// expression, according to the rules in C++0x [dcl.type.simple]p4 2641static QualType getDecltypeForExpr(const Expr *e, const ASTContext &Context) { 2642 if (e->isTypeDependent()) 2643 return Context.DependentTy; 2644 2645 // If e is an id expression or a class member access, decltype(e) is defined 2646 // as the type of the entity named by e. 2647 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2648 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2649 return VD->getType(); 2650 } 2651 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2652 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2653 return FD->getType(); 2654 } 2655 // If e is a function call or an invocation of an overloaded operator, 2656 // (parentheses around e are ignored), decltype(e) is defined as the 2657 // return type of that function. 2658 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2659 return CE->getCallReturnType(); 2660 2661 QualType T = e->getType(); 2662 2663 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2664 // defined as T&, otherwise decltype(e) is defined as T. 2665 if (e->isLValue()) 2666 T = Context.getLValueReferenceType(T); 2667 2668 return T; 2669} 2670 2671/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2672/// DecltypeType AST's. The only motivation to unique these nodes would be 2673/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2674/// an issue. This doesn't effect the type checker, since it operates 2675/// on canonical type's (which are always unique). 2676QualType ASTContext::getDecltypeType(Expr *e) const { 2677 DecltypeType *dt; 2678 if (e->isTypeDependent()) { 2679 llvm::FoldingSetNodeID ID; 2680 DependentDecltypeType::Profile(ID, *this, e); 2681 2682 void *InsertPos = 0; 2683 DependentDecltypeType *Canon 2684 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2685 if (Canon) { 2686 // We already have a "canonical" version of an equivalent, dependent 2687 // decltype type. Use that as our canonical type. 2688 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2689 QualType((DecltypeType*)Canon, 0)); 2690 } 2691 else { 2692 // Build a new, canonical typeof(expr) type. 2693 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2694 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2695 dt = Canon; 2696 } 2697 } else { 2698 QualType T = getDecltypeForExpr(e, *this); 2699 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2700 } 2701 Types.push_back(dt); 2702 return QualType(dt, 0); 2703} 2704 2705/// getAutoType - We only unique auto types after they've been deduced. 2706QualType ASTContext::getAutoType(QualType DeducedType) const { 2707 void *InsertPos = 0; 2708 if (!DeducedType.isNull()) { 2709 // Look in the folding set for an existing type. 2710 llvm::FoldingSetNodeID ID; 2711 AutoType::Profile(ID, DeducedType); 2712 if (AutoType *AT = AutoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2713 return QualType(AT, 0); 2714 } 2715 2716 AutoType *AT = new (*this, TypeAlignment) AutoType(DeducedType); 2717 Types.push_back(AT); 2718 if (InsertPos) 2719 AutoTypes.InsertNode(AT, InsertPos); 2720 return QualType(AT, 0); 2721} 2722 2723/// getTagDeclType - Return the unique reference to the type for the 2724/// specified TagDecl (struct/union/class/enum) decl. 2725QualType ASTContext::getTagDeclType(const TagDecl *Decl) const { 2726 assert (Decl); 2727 // FIXME: What is the design on getTagDeclType when it requires casting 2728 // away const? mutable? 2729 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2730} 2731 2732/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2733/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2734/// needs to agree with the definition in <stddef.h>. 2735CanQualType ASTContext::getSizeType() const { 2736 return getFromTargetType(Target.getSizeType()); 2737} 2738 2739/// getSignedWCharType - Return the type of "signed wchar_t". 2740/// Used when in C++, as a GCC extension. 2741QualType ASTContext::getSignedWCharType() const { 2742 // FIXME: derive from "Target" ? 2743 return WCharTy; 2744} 2745 2746/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2747/// Used when in C++, as a GCC extension. 2748QualType ASTContext::getUnsignedWCharType() const { 2749 // FIXME: derive from "Target" ? 2750 return UnsignedIntTy; 2751} 2752 2753/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2754/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2755QualType ASTContext::getPointerDiffType() const { 2756 return getFromTargetType(Target.getPtrDiffType(0)); 2757} 2758 2759//===----------------------------------------------------------------------===// 2760// Type Operators 2761//===----------------------------------------------------------------------===// 2762 2763CanQualType ASTContext::getCanonicalParamType(QualType T) const { 2764 // Push qualifiers into arrays, and then discard any remaining 2765 // qualifiers. 2766 T = getCanonicalType(T); 2767 T = getVariableArrayDecayedType(T); 2768 const Type *Ty = T.getTypePtr(); 2769 QualType Result; 2770 if (isa<ArrayType>(Ty)) { 2771 Result = getArrayDecayedType(QualType(Ty,0)); 2772 } else if (isa<FunctionType>(Ty)) { 2773 Result = getPointerType(QualType(Ty, 0)); 2774 } else { 2775 Result = QualType(Ty, 0); 2776 } 2777 2778 return CanQualType::CreateUnsafe(Result); 2779} 2780 2781 2782QualType ASTContext::getUnqualifiedArrayType(QualType type, 2783 Qualifiers &quals) { 2784 SplitQualType splitType = type.getSplitUnqualifiedType(); 2785 2786 // FIXME: getSplitUnqualifiedType() actually walks all the way to 2787 // the unqualified desugared type and then drops it on the floor. 2788 // We then have to strip that sugar back off with 2789 // getUnqualifiedDesugaredType(), which is silly. 2790 const ArrayType *AT = 2791 dyn_cast<ArrayType>(splitType.first->getUnqualifiedDesugaredType()); 2792 2793 // If we don't have an array, just use the results in splitType. 2794 if (!AT) { 2795 quals = splitType.second; 2796 return QualType(splitType.first, 0); 2797 } 2798 2799 // Otherwise, recurse on the array's element type. 2800 QualType elementType = AT->getElementType(); 2801 QualType unqualElementType = getUnqualifiedArrayType(elementType, quals); 2802 2803 // If that didn't change the element type, AT has no qualifiers, so we 2804 // can just use the results in splitType. 2805 if (elementType == unqualElementType) { 2806 assert(quals.empty()); // from the recursive call 2807 quals = splitType.second; 2808 return QualType(splitType.first, 0); 2809 } 2810 2811 // Otherwise, add in the qualifiers from the outermost type, then 2812 // build the type back up. 2813 quals.addConsistentQualifiers(splitType.second); 2814 2815 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 2816 return getConstantArrayType(unqualElementType, CAT->getSize(), 2817 CAT->getSizeModifier(), 0); 2818 } 2819 2820 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 2821 return getIncompleteArrayType(unqualElementType, IAT->getSizeModifier(), 0); 2822 } 2823 2824 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 2825 return getVariableArrayType(unqualElementType, 2826 VAT->getSizeExpr(), 2827 VAT->getSizeModifier(), 2828 VAT->getIndexTypeCVRQualifiers(), 2829 VAT->getBracketsRange()); 2830 } 2831 2832 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 2833 return getDependentSizedArrayType(unqualElementType, DSAT->getSizeExpr(), 2834 DSAT->getSizeModifier(), 0, 2835 SourceRange()); 2836} 2837 2838/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 2839/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 2840/// they point to and return true. If T1 and T2 aren't pointer types 2841/// or pointer-to-member types, or if they are not similar at this 2842/// level, returns false and leaves T1 and T2 unchanged. Top-level 2843/// qualifiers on T1 and T2 are ignored. This function will typically 2844/// be called in a loop that successively "unwraps" pointer and 2845/// pointer-to-member types to compare them at each level. 2846bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 2847 const PointerType *T1PtrType = T1->getAs<PointerType>(), 2848 *T2PtrType = T2->getAs<PointerType>(); 2849 if (T1PtrType && T2PtrType) { 2850 T1 = T1PtrType->getPointeeType(); 2851 T2 = T2PtrType->getPointeeType(); 2852 return true; 2853 } 2854 2855 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 2856 *T2MPType = T2->getAs<MemberPointerType>(); 2857 if (T1MPType && T2MPType && 2858 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 2859 QualType(T2MPType->getClass(), 0))) { 2860 T1 = T1MPType->getPointeeType(); 2861 T2 = T2MPType->getPointeeType(); 2862 return true; 2863 } 2864 2865 if (getLangOptions().ObjC1) { 2866 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 2867 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 2868 if (T1OPType && T2OPType) { 2869 T1 = T1OPType->getPointeeType(); 2870 T2 = T2OPType->getPointeeType(); 2871 return true; 2872 } 2873 } 2874 2875 // FIXME: Block pointers, too? 2876 2877 return false; 2878} 2879 2880DeclarationNameInfo 2881ASTContext::getNameForTemplate(TemplateName Name, 2882 SourceLocation NameLoc) const { 2883 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2884 // DNInfo work in progress: CHECKME: what about DNLoc? 2885 return DeclarationNameInfo(TD->getDeclName(), NameLoc); 2886 2887 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2888 DeclarationName DName; 2889 if (DTN->isIdentifier()) { 2890 DName = DeclarationNames.getIdentifier(DTN->getIdentifier()); 2891 return DeclarationNameInfo(DName, NameLoc); 2892 } else { 2893 DName = DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2894 // DNInfo work in progress: FIXME: source locations? 2895 DeclarationNameLoc DNLoc; 2896 DNLoc.CXXOperatorName.BeginOpNameLoc = SourceLocation().getRawEncoding(); 2897 DNLoc.CXXOperatorName.EndOpNameLoc = SourceLocation().getRawEncoding(); 2898 return DeclarationNameInfo(DName, NameLoc, DNLoc); 2899 } 2900 } 2901 2902 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2903 assert(Storage); 2904 // DNInfo work in progress: CHECKME: what about DNLoc? 2905 return DeclarationNameInfo((*Storage->begin())->getDeclName(), NameLoc); 2906} 2907 2908TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) const { 2909 if (TemplateDecl *Template = Name.getAsTemplateDecl()) { 2910 if (TemplateTemplateParmDecl *TTP 2911 = dyn_cast<TemplateTemplateParmDecl>(Template)) 2912 Template = getCanonicalTemplateTemplateParmDecl(TTP); 2913 2914 // The canonical template name is the canonical template declaration. 2915 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2916 } 2917 2918 if (SubstTemplateTemplateParmPackStorage *SubstPack 2919 = Name.getAsSubstTemplateTemplateParmPack()) { 2920 TemplateTemplateParmDecl *CanonParam 2921 = getCanonicalTemplateTemplateParmDecl(SubstPack->getParameterPack()); 2922 TemplateArgument CanonArgPack 2923 = getCanonicalTemplateArgument(SubstPack->getArgumentPack()); 2924 return getSubstTemplateTemplateParmPack(CanonParam, CanonArgPack); 2925 } 2926 2927 assert(!Name.getAsOverloadedTemplate()); 2928 2929 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2930 assert(DTN && "Non-dependent template names must refer to template decls."); 2931 return DTN->CanonicalTemplateName; 2932} 2933 2934bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2935 X = getCanonicalTemplateName(X); 2936 Y = getCanonicalTemplateName(Y); 2937 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2938} 2939 2940TemplateArgument 2941ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) const { 2942 switch (Arg.getKind()) { 2943 case TemplateArgument::Null: 2944 return Arg; 2945 2946 case TemplateArgument::Expression: 2947 return Arg; 2948 2949 case TemplateArgument::Declaration: 2950 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2951 2952 case TemplateArgument::Template: 2953 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2954 2955 case TemplateArgument::TemplateExpansion: 2956 return TemplateArgument(getCanonicalTemplateName( 2957 Arg.getAsTemplateOrTemplatePattern()), 2958 Arg.getNumTemplateExpansions()); 2959 2960 case TemplateArgument::Integral: 2961 return TemplateArgument(*Arg.getAsIntegral(), 2962 getCanonicalType(Arg.getIntegralType())); 2963 2964 case TemplateArgument::Type: 2965 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2966 2967 case TemplateArgument::Pack: { 2968 if (Arg.pack_size() == 0) 2969 return Arg; 2970 2971 TemplateArgument *CanonArgs 2972 = new (*this) TemplateArgument[Arg.pack_size()]; 2973 unsigned Idx = 0; 2974 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2975 AEnd = Arg.pack_end(); 2976 A != AEnd; (void)++A, ++Idx) 2977 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2978 2979 return TemplateArgument(CanonArgs, Arg.pack_size()); 2980 } 2981 } 2982 2983 // Silence GCC warning 2984 assert(false && "Unhandled template argument kind"); 2985 return TemplateArgument(); 2986} 2987 2988NestedNameSpecifier * 2989ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const { 2990 if (!NNS) 2991 return 0; 2992 2993 switch (NNS->getKind()) { 2994 case NestedNameSpecifier::Identifier: 2995 // Canonicalize the prefix but keep the identifier the same. 2996 return NestedNameSpecifier::Create(*this, 2997 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2998 NNS->getAsIdentifier()); 2999 3000 case NestedNameSpecifier::Namespace: 3001 // A namespace is canonical; build a nested-name-specifier with 3002 // this namespace and no prefix. 3003 return NestedNameSpecifier::Create(*this, 0, 3004 NNS->getAsNamespace()->getOriginalNamespace()); 3005 3006 case NestedNameSpecifier::NamespaceAlias: 3007 // A namespace is canonical; build a nested-name-specifier with 3008 // this namespace and no prefix. 3009 return NestedNameSpecifier::Create(*this, 0, 3010 NNS->getAsNamespaceAlias()->getNamespace() 3011 ->getOriginalNamespace()); 3012 3013 case NestedNameSpecifier::TypeSpec: 3014 case NestedNameSpecifier::TypeSpecWithTemplate: { 3015 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 3016 3017 // If we have some kind of dependent-named type (e.g., "typename T::type"), 3018 // break it apart into its prefix and identifier, then reconsititute those 3019 // as the canonical nested-name-specifier. This is required to canonicalize 3020 // a dependent nested-name-specifier involving typedefs of dependent-name 3021 // types, e.g., 3022 // typedef typename T::type T1; 3023 // typedef typename T1::type T2; 3024 if (const DependentNameType *DNT = T->getAs<DependentNameType>()) { 3025 NestedNameSpecifier *Prefix 3026 = getCanonicalNestedNameSpecifier(DNT->getQualifier()); 3027 return NestedNameSpecifier::Create(*this, Prefix, 3028 const_cast<IdentifierInfo *>(DNT->getIdentifier())); 3029 } 3030 3031 // Do the same thing as above, but with dependent-named specializations. 3032 if (const DependentTemplateSpecializationType *DTST 3033 = T->getAs<DependentTemplateSpecializationType>()) { 3034 NestedNameSpecifier *Prefix 3035 = getCanonicalNestedNameSpecifier(DTST->getQualifier()); 3036 3037 T = getDependentTemplateSpecializationType(DTST->getKeyword(), 3038 Prefix, DTST->getIdentifier(), 3039 DTST->getNumArgs(), 3040 DTST->getArgs()); 3041 T = getCanonicalType(T); 3042 } 3043 3044 return NestedNameSpecifier::Create(*this, 0, false, 3045 const_cast<Type*>(T.getTypePtr())); 3046 } 3047 3048 case NestedNameSpecifier::Global: 3049 // The global specifier is canonical and unique. 3050 return NNS; 3051 } 3052 3053 // Required to silence a GCC warning 3054 return 0; 3055} 3056 3057 3058const ArrayType *ASTContext::getAsArrayType(QualType T) const { 3059 // Handle the non-qualified case efficiently. 3060 if (!T.hasLocalQualifiers()) { 3061 // Handle the common positive case fast. 3062 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 3063 return AT; 3064 } 3065 3066 // Handle the common negative case fast. 3067 if (!isa<ArrayType>(T.getCanonicalType())) 3068 return 0; 3069 3070 // Apply any qualifiers from the array type to the element type. This 3071 // implements C99 6.7.3p8: "If the specification of an array type includes 3072 // any type qualifiers, the element type is so qualified, not the array type." 3073 3074 // If we get here, we either have type qualifiers on the type, or we have 3075 // sugar such as a typedef in the way. If we have type qualifiers on the type 3076 // we must propagate them down into the element type. 3077 3078 SplitQualType split = T.getSplitDesugaredType(); 3079 Qualifiers qs = split.second; 3080 3081 // If we have a simple case, just return now. 3082 const ArrayType *ATy = dyn_cast<ArrayType>(split.first); 3083 if (ATy == 0 || qs.empty()) 3084 return ATy; 3085 3086 // Otherwise, we have an array and we have qualifiers on it. Push the 3087 // qualifiers into the array element type and return a new array type. 3088 QualType NewEltTy = getQualifiedType(ATy->getElementType(), qs); 3089 3090 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 3091 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 3092 CAT->getSizeModifier(), 3093 CAT->getIndexTypeCVRQualifiers())); 3094 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 3095 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 3096 IAT->getSizeModifier(), 3097 IAT->getIndexTypeCVRQualifiers())); 3098 3099 if (const DependentSizedArrayType *DSAT 3100 = dyn_cast<DependentSizedArrayType>(ATy)) 3101 return cast<ArrayType>( 3102 getDependentSizedArrayType(NewEltTy, 3103 DSAT->getSizeExpr(), 3104 DSAT->getSizeModifier(), 3105 DSAT->getIndexTypeCVRQualifiers(), 3106 DSAT->getBracketsRange())); 3107 3108 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 3109 return cast<ArrayType>(getVariableArrayType(NewEltTy, 3110 VAT->getSizeExpr(), 3111 VAT->getSizeModifier(), 3112 VAT->getIndexTypeCVRQualifiers(), 3113 VAT->getBracketsRange())); 3114} 3115 3116/// getArrayDecayedType - Return the properly qualified result of decaying the 3117/// specified array type to a pointer. This operation is non-trivial when 3118/// handling typedefs etc. The canonical type of "T" must be an array type, 3119/// this returns a pointer to a properly qualified element of the array. 3120/// 3121/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 3122QualType ASTContext::getArrayDecayedType(QualType Ty) const { 3123 // Get the element type with 'getAsArrayType' so that we don't lose any 3124 // typedefs in the element type of the array. This also handles propagation 3125 // of type qualifiers from the array type into the element type if present 3126 // (C99 6.7.3p8). 3127 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 3128 assert(PrettyArrayType && "Not an array type!"); 3129 3130 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 3131 3132 // int x[restrict 4] -> int *restrict 3133 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 3134} 3135 3136QualType ASTContext::getBaseElementType(const ArrayType *array) const { 3137 return getBaseElementType(array->getElementType()); 3138} 3139 3140QualType ASTContext::getBaseElementType(QualType type) const { 3141 Qualifiers qs; 3142 while (true) { 3143 SplitQualType split = type.getSplitDesugaredType(); 3144 const ArrayType *array = split.first->getAsArrayTypeUnsafe(); 3145 if (!array) break; 3146 3147 type = array->getElementType(); 3148 qs.addConsistentQualifiers(split.second); 3149 } 3150 3151 return getQualifiedType(type, qs); 3152} 3153 3154/// getConstantArrayElementCount - Returns number of constant array elements. 3155uint64_t 3156ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 3157 uint64_t ElementCount = 1; 3158 do { 3159 ElementCount *= CA->getSize().getZExtValue(); 3160 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 3161 } while (CA); 3162 return ElementCount; 3163} 3164 3165/// getFloatingRank - Return a relative rank for floating point types. 3166/// This routine will assert if passed a built-in type that isn't a float. 3167static FloatingRank getFloatingRank(QualType T) { 3168 if (const ComplexType *CT = T->getAs<ComplexType>()) 3169 return getFloatingRank(CT->getElementType()); 3170 3171 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 3172 switch (T->getAs<BuiltinType>()->getKind()) { 3173 default: assert(0 && "getFloatingRank(): not a floating type"); 3174 case BuiltinType::Float: return FloatRank; 3175 case BuiltinType::Double: return DoubleRank; 3176 case BuiltinType::LongDouble: return LongDoubleRank; 3177 } 3178} 3179 3180/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 3181/// point or a complex type (based on typeDomain/typeSize). 3182/// 'typeDomain' is a real floating point or complex type. 3183/// 'typeSize' is a real floating point or complex type. 3184QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 3185 QualType Domain) const { 3186 FloatingRank EltRank = getFloatingRank(Size); 3187 if (Domain->isComplexType()) { 3188 switch (EltRank) { 3189 default: assert(0 && "getFloatingRank(): illegal value for rank"); 3190 case FloatRank: return FloatComplexTy; 3191 case DoubleRank: return DoubleComplexTy; 3192 case LongDoubleRank: return LongDoubleComplexTy; 3193 } 3194 } 3195 3196 assert(Domain->isRealFloatingType() && "Unknown domain!"); 3197 switch (EltRank) { 3198 default: assert(0 && "getFloatingRank(): illegal value for rank"); 3199 case FloatRank: return FloatTy; 3200 case DoubleRank: return DoubleTy; 3201 case LongDoubleRank: return LongDoubleTy; 3202 } 3203} 3204 3205/// getFloatingTypeOrder - Compare the rank of the two specified floating 3206/// point types, ignoring the domain of the type (i.e. 'double' == 3207/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 3208/// LHS < RHS, return -1. 3209int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) const { 3210 FloatingRank LHSR = getFloatingRank(LHS); 3211 FloatingRank RHSR = getFloatingRank(RHS); 3212 3213 if (LHSR == RHSR) 3214 return 0; 3215 if (LHSR > RHSR) 3216 return 1; 3217 return -1; 3218} 3219 3220/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 3221/// routine will assert if passed a built-in type that isn't an integer or enum, 3222/// or if it is not canonicalized. 3223unsigned ASTContext::getIntegerRank(const Type *T) const { 3224 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 3225 if (const EnumType* ET = dyn_cast<EnumType>(T)) 3226 T = ET->getDecl()->getPromotionType().getTypePtr(); 3227 3228 if (T->isSpecificBuiltinType(BuiltinType::WChar_S) || 3229 T->isSpecificBuiltinType(BuiltinType::WChar_U)) 3230 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 3231 3232 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 3233 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 3234 3235 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 3236 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 3237 3238 switch (cast<BuiltinType>(T)->getKind()) { 3239 default: assert(0 && "getIntegerRank(): not a built-in integer"); 3240 case BuiltinType::Bool: 3241 return 1 + (getIntWidth(BoolTy) << 3); 3242 case BuiltinType::Char_S: 3243 case BuiltinType::Char_U: 3244 case BuiltinType::SChar: 3245 case BuiltinType::UChar: 3246 return 2 + (getIntWidth(CharTy) << 3); 3247 case BuiltinType::Short: 3248 case BuiltinType::UShort: 3249 return 3 + (getIntWidth(ShortTy) << 3); 3250 case BuiltinType::Int: 3251 case BuiltinType::UInt: 3252 return 4 + (getIntWidth(IntTy) << 3); 3253 case BuiltinType::Long: 3254 case BuiltinType::ULong: 3255 return 5 + (getIntWidth(LongTy) << 3); 3256 case BuiltinType::LongLong: 3257 case BuiltinType::ULongLong: 3258 return 6 + (getIntWidth(LongLongTy) << 3); 3259 case BuiltinType::Int128: 3260 case BuiltinType::UInt128: 3261 return 7 + (getIntWidth(Int128Ty) << 3); 3262 } 3263} 3264 3265/// \brief Whether this is a promotable bitfield reference according 3266/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 3267/// 3268/// \returns the type this bit-field will promote to, or NULL if no 3269/// promotion occurs. 3270QualType ASTContext::isPromotableBitField(Expr *E) const { 3271 if (E->isTypeDependent() || E->isValueDependent()) 3272 return QualType(); 3273 3274 FieldDecl *Field = E->getBitField(); 3275 if (!Field) 3276 return QualType(); 3277 3278 QualType FT = Field->getType(); 3279 3280 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 3281 uint64_t BitWidth = BitWidthAP.getZExtValue(); 3282 uint64_t IntSize = getTypeSize(IntTy); 3283 // GCC extension compatibility: if the bit-field size is less than or equal 3284 // to the size of int, it gets promoted no matter what its type is. 3285 // For instance, unsigned long bf : 4 gets promoted to signed int. 3286 if (BitWidth < IntSize) 3287 return IntTy; 3288 3289 if (BitWidth == IntSize) 3290 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 3291 3292 // Types bigger than int are not subject to promotions, and therefore act 3293 // like the base type. 3294 // FIXME: This doesn't quite match what gcc does, but what gcc does here 3295 // is ridiculous. 3296 return QualType(); 3297} 3298 3299/// getPromotedIntegerType - Returns the type that Promotable will 3300/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 3301/// integer type. 3302QualType ASTContext::getPromotedIntegerType(QualType Promotable) const { 3303 assert(!Promotable.isNull()); 3304 assert(Promotable->isPromotableIntegerType()); 3305 if (const EnumType *ET = Promotable->getAs<EnumType>()) 3306 return ET->getDecl()->getPromotionType(); 3307 if (Promotable->isSignedIntegerType()) 3308 return IntTy; 3309 uint64_t PromotableSize = getTypeSize(Promotable); 3310 uint64_t IntSize = getTypeSize(IntTy); 3311 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 3312 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 3313} 3314 3315/// getIntegerTypeOrder - Returns the highest ranked integer type: 3316/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 3317/// LHS < RHS, return -1. 3318int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) const { 3319 const Type *LHSC = getCanonicalType(LHS).getTypePtr(); 3320 const Type *RHSC = getCanonicalType(RHS).getTypePtr(); 3321 if (LHSC == RHSC) return 0; 3322 3323 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 3324 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 3325 3326 unsigned LHSRank = getIntegerRank(LHSC); 3327 unsigned RHSRank = getIntegerRank(RHSC); 3328 3329 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 3330 if (LHSRank == RHSRank) return 0; 3331 return LHSRank > RHSRank ? 1 : -1; 3332 } 3333 3334 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 3335 if (LHSUnsigned) { 3336 // If the unsigned [LHS] type is larger, return it. 3337 if (LHSRank >= RHSRank) 3338 return 1; 3339 3340 // If the signed type can represent all values of the unsigned type, it 3341 // wins. Because we are dealing with 2's complement and types that are 3342 // powers of two larger than each other, this is always safe. 3343 return -1; 3344 } 3345 3346 // If the unsigned [RHS] type is larger, return it. 3347 if (RHSRank >= LHSRank) 3348 return -1; 3349 3350 // If the signed type can represent all values of the unsigned type, it 3351 // wins. Because we are dealing with 2's complement and types that are 3352 // powers of two larger than each other, this is always safe. 3353 return 1; 3354} 3355 3356static RecordDecl * 3357CreateRecordDecl(const ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 3358 SourceLocation L, IdentifierInfo *Id) { 3359 if (Ctx.getLangOptions().CPlusPlus) 3360 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 3361 else 3362 return RecordDecl::Create(Ctx, TK, DC, L, Id); 3363} 3364 3365// getCFConstantStringType - Return the type used for constant CFStrings. 3366QualType ASTContext::getCFConstantStringType() const { 3367 if (!CFConstantStringTypeDecl) { 3368 CFConstantStringTypeDecl = 3369 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3370 &Idents.get("NSConstantString")); 3371 CFConstantStringTypeDecl->startDefinition(); 3372 3373 QualType FieldTypes[4]; 3374 3375 // const int *isa; 3376 FieldTypes[0] = getPointerType(IntTy.withConst()); 3377 // int flags; 3378 FieldTypes[1] = IntTy; 3379 // const char *str; 3380 FieldTypes[2] = getPointerType(CharTy.withConst()); 3381 // long length; 3382 FieldTypes[3] = LongTy; 3383 3384 // Create fields 3385 for (unsigned i = 0; i < 4; ++i) { 3386 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 3387 SourceLocation(), 0, 3388 FieldTypes[i], /*TInfo=*/0, 3389 /*BitWidth=*/0, 3390 /*Mutable=*/false); 3391 Field->setAccess(AS_public); 3392 CFConstantStringTypeDecl->addDecl(Field); 3393 } 3394 3395 CFConstantStringTypeDecl->completeDefinition(); 3396 } 3397 3398 return getTagDeclType(CFConstantStringTypeDecl); 3399} 3400 3401void ASTContext::setCFConstantStringType(QualType T) { 3402 const RecordType *Rec = T->getAs<RecordType>(); 3403 assert(Rec && "Invalid CFConstantStringType"); 3404 CFConstantStringTypeDecl = Rec->getDecl(); 3405} 3406 3407// getNSConstantStringType - Return the type used for constant NSStrings. 3408QualType ASTContext::getNSConstantStringType() const { 3409 if (!NSConstantStringTypeDecl) { 3410 NSConstantStringTypeDecl = 3411 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3412 &Idents.get("__builtin_NSString")); 3413 NSConstantStringTypeDecl->startDefinition(); 3414 3415 QualType FieldTypes[3]; 3416 3417 // const int *isa; 3418 FieldTypes[0] = getPointerType(IntTy.withConst()); 3419 // const char *str; 3420 FieldTypes[1] = getPointerType(CharTy.withConst()); 3421 // unsigned int length; 3422 FieldTypes[2] = UnsignedIntTy; 3423 3424 // Create fields 3425 for (unsigned i = 0; i < 3; ++i) { 3426 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 3427 SourceLocation(), 0, 3428 FieldTypes[i], /*TInfo=*/0, 3429 /*BitWidth=*/0, 3430 /*Mutable=*/false); 3431 Field->setAccess(AS_public); 3432 NSConstantStringTypeDecl->addDecl(Field); 3433 } 3434 3435 NSConstantStringTypeDecl->completeDefinition(); 3436 } 3437 3438 return getTagDeclType(NSConstantStringTypeDecl); 3439} 3440 3441void ASTContext::setNSConstantStringType(QualType T) { 3442 const RecordType *Rec = T->getAs<RecordType>(); 3443 assert(Rec && "Invalid NSConstantStringType"); 3444 NSConstantStringTypeDecl = Rec->getDecl(); 3445} 3446 3447QualType ASTContext::getObjCFastEnumerationStateType() const { 3448 if (!ObjCFastEnumerationStateTypeDecl) { 3449 ObjCFastEnumerationStateTypeDecl = 3450 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3451 &Idents.get("__objcFastEnumerationState")); 3452 ObjCFastEnumerationStateTypeDecl->startDefinition(); 3453 3454 QualType FieldTypes[] = { 3455 UnsignedLongTy, 3456 getPointerType(ObjCIdTypedefType), 3457 getPointerType(UnsignedLongTy), 3458 getConstantArrayType(UnsignedLongTy, 3459 llvm::APInt(32, 5), ArrayType::Normal, 0) 3460 }; 3461 3462 for (size_t i = 0; i < 4; ++i) { 3463 FieldDecl *Field = FieldDecl::Create(*this, 3464 ObjCFastEnumerationStateTypeDecl, 3465 SourceLocation(), 0, 3466 FieldTypes[i], /*TInfo=*/0, 3467 /*BitWidth=*/0, 3468 /*Mutable=*/false); 3469 Field->setAccess(AS_public); 3470 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 3471 } 3472 3473 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 3474 } 3475 3476 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 3477} 3478 3479QualType ASTContext::getBlockDescriptorType() const { 3480 if (BlockDescriptorType) 3481 return getTagDeclType(BlockDescriptorType); 3482 3483 RecordDecl *T; 3484 // FIXME: Needs the FlagAppleBlock bit. 3485 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3486 &Idents.get("__block_descriptor")); 3487 T->startDefinition(); 3488 3489 QualType FieldTypes[] = { 3490 UnsignedLongTy, 3491 UnsignedLongTy, 3492 }; 3493 3494 const char *FieldNames[] = { 3495 "reserved", 3496 "Size" 3497 }; 3498 3499 for (size_t i = 0; i < 2; ++i) { 3500 FieldDecl *Field = FieldDecl::Create(*this, 3501 T, 3502 SourceLocation(), 3503 &Idents.get(FieldNames[i]), 3504 FieldTypes[i], /*TInfo=*/0, 3505 /*BitWidth=*/0, 3506 /*Mutable=*/false); 3507 Field->setAccess(AS_public); 3508 T->addDecl(Field); 3509 } 3510 3511 T->completeDefinition(); 3512 3513 BlockDescriptorType = T; 3514 3515 return getTagDeclType(BlockDescriptorType); 3516} 3517 3518void ASTContext::setBlockDescriptorType(QualType T) { 3519 const RecordType *Rec = T->getAs<RecordType>(); 3520 assert(Rec && "Invalid BlockDescriptorType"); 3521 BlockDescriptorType = Rec->getDecl(); 3522} 3523 3524QualType ASTContext::getBlockDescriptorExtendedType() const { 3525 if (BlockDescriptorExtendedType) 3526 return getTagDeclType(BlockDescriptorExtendedType); 3527 3528 RecordDecl *T; 3529 // FIXME: Needs the FlagAppleBlock bit. 3530 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3531 &Idents.get("__block_descriptor_withcopydispose")); 3532 T->startDefinition(); 3533 3534 QualType FieldTypes[] = { 3535 UnsignedLongTy, 3536 UnsignedLongTy, 3537 getPointerType(VoidPtrTy), 3538 getPointerType(VoidPtrTy) 3539 }; 3540 3541 const char *FieldNames[] = { 3542 "reserved", 3543 "Size", 3544 "CopyFuncPtr", 3545 "DestroyFuncPtr" 3546 }; 3547 3548 for (size_t i = 0; i < 4; ++i) { 3549 FieldDecl *Field = FieldDecl::Create(*this, 3550 T, 3551 SourceLocation(), 3552 &Idents.get(FieldNames[i]), 3553 FieldTypes[i], /*TInfo=*/0, 3554 /*BitWidth=*/0, 3555 /*Mutable=*/false); 3556 Field->setAccess(AS_public); 3557 T->addDecl(Field); 3558 } 3559 3560 T->completeDefinition(); 3561 3562 BlockDescriptorExtendedType = T; 3563 3564 return getTagDeclType(BlockDescriptorExtendedType); 3565} 3566 3567void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3568 const RecordType *Rec = T->getAs<RecordType>(); 3569 assert(Rec && "Invalid BlockDescriptorType"); 3570 BlockDescriptorExtendedType = Rec->getDecl(); 3571} 3572 3573bool ASTContext::BlockRequiresCopying(QualType Ty) const { 3574 if (Ty->isBlockPointerType()) 3575 return true; 3576 if (isObjCNSObjectType(Ty)) 3577 return true; 3578 if (Ty->isObjCObjectPointerType()) 3579 return true; 3580 if (getLangOptions().CPlusPlus) { 3581 if (const RecordType *RT = Ty->getAs<RecordType>()) { 3582 CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 3583 return RD->hasConstCopyConstructor(*this); 3584 3585 } 3586 } 3587 return false; 3588} 3589 3590QualType 3591ASTContext::BuildByRefType(llvm::StringRef DeclName, QualType Ty) const { 3592 // type = struct __Block_byref_1_X { 3593 // void *__isa; 3594 // struct __Block_byref_1_X *__forwarding; 3595 // unsigned int __flags; 3596 // unsigned int __size; 3597 // void *__copy_helper; // as needed 3598 // void *__destroy_help // as needed 3599 // int X; 3600 // } * 3601 3602 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3603 3604 // FIXME: Move up 3605 llvm::SmallString<36> Name; 3606 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3607 ++UniqueBlockByRefTypeID << '_' << DeclName; 3608 RecordDecl *T; 3609 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3610 &Idents.get(Name.str())); 3611 T->startDefinition(); 3612 QualType Int32Ty = IntTy; 3613 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3614 QualType FieldTypes[] = { 3615 getPointerType(VoidPtrTy), 3616 getPointerType(getTagDeclType(T)), 3617 Int32Ty, 3618 Int32Ty, 3619 getPointerType(VoidPtrTy), 3620 getPointerType(VoidPtrTy), 3621 Ty 3622 }; 3623 3624 llvm::StringRef FieldNames[] = { 3625 "__isa", 3626 "__forwarding", 3627 "__flags", 3628 "__size", 3629 "__copy_helper", 3630 "__destroy_helper", 3631 DeclName, 3632 }; 3633 3634 for (size_t i = 0; i < 7; ++i) { 3635 if (!HasCopyAndDispose && i >=4 && i <= 5) 3636 continue; 3637 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3638 &Idents.get(FieldNames[i]), 3639 FieldTypes[i], /*TInfo=*/0, 3640 /*BitWidth=*/0, /*Mutable=*/false); 3641 Field->setAccess(AS_public); 3642 T->addDecl(Field); 3643 } 3644 3645 T->completeDefinition(); 3646 3647 return getPointerType(getTagDeclType(T)); 3648} 3649 3650void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3651 const RecordType *Rec = T->getAs<RecordType>(); 3652 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3653 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3654} 3655 3656// This returns true if a type has been typedefed to BOOL: 3657// typedef <type> BOOL; 3658static bool isTypeTypedefedAsBOOL(QualType T) { 3659 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3660 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3661 return II->isStr("BOOL"); 3662 3663 return false; 3664} 3665 3666/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3667/// purpose. 3668CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) const { 3669 CharUnits sz = getTypeSizeInChars(type); 3670 3671 // Make all integer and enum types at least as large as an int 3672 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 3673 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3674 // Treat arrays as pointers, since that's how they're passed in. 3675 else if (type->isArrayType()) 3676 sz = getTypeSizeInChars(VoidPtrTy); 3677 return sz; 3678} 3679 3680static inline 3681std::string charUnitsToString(const CharUnits &CU) { 3682 return llvm::itostr(CU.getQuantity()); 3683} 3684 3685/// getObjCEncodingForBlock - Return the encoded type for this block 3686/// declaration. 3687std::string ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr) const { 3688 std::string S; 3689 3690 const BlockDecl *Decl = Expr->getBlockDecl(); 3691 QualType BlockTy = 3692 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3693 // Encode result type. 3694 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3695 // Compute size of all parameters. 3696 // Start with computing size of a pointer in number of bytes. 3697 // FIXME: There might(should) be a better way of doing this computation! 3698 SourceLocation Loc; 3699 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3700 CharUnits ParmOffset = PtrSize; 3701 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3702 E = Decl->param_end(); PI != E; ++PI) { 3703 QualType PType = (*PI)->getType(); 3704 CharUnits sz = getObjCEncodingTypeSize(PType); 3705 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3706 ParmOffset += sz; 3707 } 3708 // Size of the argument frame 3709 S += charUnitsToString(ParmOffset); 3710 // Block pointer and offset. 3711 S += "@?0"; 3712 ParmOffset = PtrSize; 3713 3714 // Argument types. 3715 ParmOffset = PtrSize; 3716 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3717 Decl->param_end(); PI != E; ++PI) { 3718 ParmVarDecl *PVDecl = *PI; 3719 QualType PType = PVDecl->getOriginalType(); 3720 if (const ArrayType *AT = 3721 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3722 // Use array's original type only if it has known number of 3723 // elements. 3724 if (!isa<ConstantArrayType>(AT)) 3725 PType = PVDecl->getType(); 3726 } else if (PType->isFunctionType()) 3727 PType = PVDecl->getType(); 3728 getObjCEncodingForType(PType, S); 3729 S += charUnitsToString(ParmOffset); 3730 ParmOffset += getObjCEncodingTypeSize(PType); 3731 } 3732 3733 return S; 3734} 3735 3736void ASTContext::getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, 3737 std::string& S) { 3738 // Encode result type. 3739 getObjCEncodingForType(Decl->getResultType(), S); 3740 CharUnits ParmOffset; 3741 // Compute size of all parameters. 3742 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 3743 E = Decl->param_end(); PI != E; ++PI) { 3744 QualType PType = (*PI)->getType(); 3745 CharUnits sz = getObjCEncodingTypeSize(PType); 3746 assert (sz.isPositive() && 3747 "getObjCEncodingForMethodDecl - Incomplete param type"); 3748 ParmOffset += sz; 3749 } 3750 S += charUnitsToString(ParmOffset); 3751 ParmOffset = CharUnits::Zero(); 3752 3753 // Argument types. 3754 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 3755 E = Decl->param_end(); PI != E; ++PI) { 3756 ParmVarDecl *PVDecl = *PI; 3757 QualType PType = PVDecl->getOriginalType(); 3758 if (const ArrayType *AT = 3759 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3760 // Use array's original type only if it has known number of 3761 // elements. 3762 if (!isa<ConstantArrayType>(AT)) 3763 PType = PVDecl->getType(); 3764 } else if (PType->isFunctionType()) 3765 PType = PVDecl->getType(); 3766 getObjCEncodingForType(PType, S); 3767 S += charUnitsToString(ParmOffset); 3768 ParmOffset += getObjCEncodingTypeSize(PType); 3769 } 3770} 3771 3772/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3773/// declaration. 3774void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3775 std::string& S) const { 3776 // FIXME: This is not very efficient. 3777 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3778 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3779 // Encode result type. 3780 getObjCEncodingForType(Decl->getResultType(), S); 3781 // Compute size of all parameters. 3782 // Start with computing size of a pointer in number of bytes. 3783 // FIXME: There might(should) be a better way of doing this computation! 3784 SourceLocation Loc; 3785 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3786 // The first two arguments (self and _cmd) are pointers; account for 3787 // their size. 3788 CharUnits ParmOffset = 2 * PtrSize; 3789 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3790 E = Decl->sel_param_end(); PI != E; ++PI) { 3791 QualType PType = (*PI)->getType(); 3792 CharUnits sz = getObjCEncodingTypeSize(PType); 3793 assert (sz.isPositive() && 3794 "getObjCEncodingForMethodDecl - Incomplete param type"); 3795 ParmOffset += sz; 3796 } 3797 S += charUnitsToString(ParmOffset); 3798 S += "@0:"; 3799 S += charUnitsToString(PtrSize); 3800 3801 // Argument types. 3802 ParmOffset = 2 * PtrSize; 3803 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3804 E = Decl->sel_param_end(); PI != E; ++PI) { 3805 ParmVarDecl *PVDecl = *PI; 3806 QualType PType = PVDecl->getOriginalType(); 3807 if (const ArrayType *AT = 3808 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3809 // Use array's original type only if it has known number of 3810 // elements. 3811 if (!isa<ConstantArrayType>(AT)) 3812 PType = PVDecl->getType(); 3813 } else if (PType->isFunctionType()) 3814 PType = PVDecl->getType(); 3815 // Process argument qualifiers for user supplied arguments; such as, 3816 // 'in', 'inout', etc. 3817 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3818 getObjCEncodingForType(PType, S); 3819 S += charUnitsToString(ParmOffset); 3820 ParmOffset += getObjCEncodingTypeSize(PType); 3821 } 3822} 3823 3824/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3825/// property declaration. If non-NULL, Container must be either an 3826/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3827/// NULL when getting encodings for protocol properties. 3828/// Property attributes are stored as a comma-delimited C string. The simple 3829/// attributes readonly and bycopy are encoded as single characters. The 3830/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3831/// encoded as single characters, followed by an identifier. Property types 3832/// are also encoded as a parametrized attribute. The characters used to encode 3833/// these attributes are defined by the following enumeration: 3834/// @code 3835/// enum PropertyAttributes { 3836/// kPropertyReadOnly = 'R', // property is read-only. 3837/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3838/// kPropertyByref = '&', // property is a reference to the value last assigned 3839/// kPropertyDynamic = 'D', // property is dynamic 3840/// kPropertyGetter = 'G', // followed by getter selector name 3841/// kPropertySetter = 'S', // followed by setter selector name 3842/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3843/// kPropertyType = 't' // followed by old-style type encoding. 3844/// kPropertyWeak = 'W' // 'weak' property 3845/// kPropertyStrong = 'P' // property GC'able 3846/// kPropertyNonAtomic = 'N' // property non-atomic 3847/// }; 3848/// @endcode 3849void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3850 const Decl *Container, 3851 std::string& S) const { 3852 // Collect information from the property implementation decl(s). 3853 bool Dynamic = false; 3854 ObjCPropertyImplDecl *SynthesizePID = 0; 3855 3856 // FIXME: Duplicated code due to poor abstraction. 3857 if (Container) { 3858 if (const ObjCCategoryImplDecl *CID = 3859 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3860 for (ObjCCategoryImplDecl::propimpl_iterator 3861 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3862 i != e; ++i) { 3863 ObjCPropertyImplDecl *PID = *i; 3864 if (PID->getPropertyDecl() == PD) { 3865 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3866 Dynamic = true; 3867 } else { 3868 SynthesizePID = PID; 3869 } 3870 } 3871 } 3872 } else { 3873 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3874 for (ObjCCategoryImplDecl::propimpl_iterator 3875 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3876 i != e; ++i) { 3877 ObjCPropertyImplDecl *PID = *i; 3878 if (PID->getPropertyDecl() == PD) { 3879 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3880 Dynamic = true; 3881 } else { 3882 SynthesizePID = PID; 3883 } 3884 } 3885 } 3886 } 3887 } 3888 3889 // FIXME: This is not very efficient. 3890 S = "T"; 3891 3892 // Encode result type. 3893 // GCC has some special rules regarding encoding of properties which 3894 // closely resembles encoding of ivars. 3895 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3896 true /* outermost type */, 3897 true /* encoding for property */); 3898 3899 if (PD->isReadOnly()) { 3900 S += ",R"; 3901 } else { 3902 switch (PD->getSetterKind()) { 3903 case ObjCPropertyDecl::Assign: break; 3904 case ObjCPropertyDecl::Copy: S += ",C"; break; 3905 case ObjCPropertyDecl::Retain: S += ",&"; break; 3906 } 3907 } 3908 3909 // It really isn't clear at all what this means, since properties 3910 // are "dynamic by default". 3911 if (Dynamic) 3912 S += ",D"; 3913 3914 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3915 S += ",N"; 3916 3917 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3918 S += ",G"; 3919 S += PD->getGetterName().getAsString(); 3920 } 3921 3922 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3923 S += ",S"; 3924 S += PD->getSetterName().getAsString(); 3925 } 3926 3927 if (SynthesizePID) { 3928 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3929 S += ",V"; 3930 S += OID->getNameAsString(); 3931 } 3932 3933 // FIXME: OBJCGC: weak & strong 3934} 3935 3936/// getLegacyIntegralTypeEncoding - 3937/// Another legacy compatibility encoding: 32-bit longs are encoded as 3938/// 'l' or 'L' , but not always. For typedefs, we need to use 3939/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3940/// 3941void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3942 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3943 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3944 if (BT->getKind() == BuiltinType::ULong && getIntWidth(PointeeTy) == 32) 3945 PointeeTy = UnsignedIntTy; 3946 else 3947 if (BT->getKind() == BuiltinType::Long && getIntWidth(PointeeTy) == 32) 3948 PointeeTy = IntTy; 3949 } 3950 } 3951} 3952 3953void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3954 const FieldDecl *Field) const { 3955 // We follow the behavior of gcc, expanding structures which are 3956 // directly pointed to, and expanding embedded structures. Note that 3957 // these rules are sufficient to prevent recursive encoding of the 3958 // same type. 3959 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3960 true /* outermost type */); 3961} 3962 3963static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 3964 switch (T->getAs<BuiltinType>()->getKind()) { 3965 default: assert(0 && "Unhandled builtin type kind"); 3966 case BuiltinType::Void: return 'v'; 3967 case BuiltinType::Bool: return 'B'; 3968 case BuiltinType::Char_U: 3969 case BuiltinType::UChar: return 'C'; 3970 case BuiltinType::UShort: return 'S'; 3971 case BuiltinType::UInt: return 'I'; 3972 case BuiltinType::ULong: 3973 return C->getIntWidth(T) == 32 ? 'L' : 'Q'; 3974 case BuiltinType::UInt128: return 'T'; 3975 case BuiltinType::ULongLong: return 'Q'; 3976 case BuiltinType::Char_S: 3977 case BuiltinType::SChar: return 'c'; 3978 case BuiltinType::Short: return 's'; 3979 case BuiltinType::WChar_S: 3980 case BuiltinType::WChar_U: 3981 case BuiltinType::Int: return 'i'; 3982 case BuiltinType::Long: 3983 return C->getIntWidth(T) == 32 ? 'l' : 'q'; 3984 case BuiltinType::LongLong: return 'q'; 3985 case BuiltinType::Int128: return 't'; 3986 case BuiltinType::Float: return 'f'; 3987 case BuiltinType::Double: return 'd'; 3988 case BuiltinType::LongDouble: return 'D'; 3989 } 3990} 3991 3992static void EncodeBitField(const ASTContext *Ctx, std::string& S, 3993 QualType T, const FieldDecl *FD) { 3994 const Expr *E = FD->getBitWidth(); 3995 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3996 S += 'b'; 3997 // The NeXT runtime encodes bit fields as b followed by the number of bits. 3998 // The GNU runtime requires more information; bitfields are encoded as b, 3999 // then the offset (in bits) of the first element, then the type of the 4000 // bitfield, then the size in bits. For example, in this structure: 4001 // 4002 // struct 4003 // { 4004 // int integer; 4005 // int flags:2; 4006 // }; 4007 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 4008 // runtime, but b32i2 for the GNU runtime. The reason for this extra 4009 // information is not especially sensible, but we're stuck with it for 4010 // compatibility with GCC, although providing it breaks anything that 4011 // actually uses runtime introspection and wants to work on both runtimes... 4012 if (!Ctx->getLangOptions().NeXTRuntime) { 4013 const RecordDecl *RD = FD->getParent(); 4014 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 4015 // FIXME: This same linear search is also used in ExprConstant - it might 4016 // be better if the FieldDecl stored its offset. We'd be increasing the 4017 // size of the object slightly, but saving some time every time it is used. 4018 unsigned i = 0; 4019 for (RecordDecl::field_iterator Field = RD->field_begin(), 4020 FieldEnd = RD->field_end(); 4021 Field != FieldEnd; (void)++Field, ++i) { 4022 if (*Field == FD) 4023 break; 4024 } 4025 S += llvm::utostr(RL.getFieldOffset(i)); 4026 if (T->isEnumeralType()) 4027 S += 'i'; 4028 else 4029 S += ObjCEncodingForPrimitiveKind(Ctx, T); 4030 } 4031 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 4032 S += llvm::utostr(N); 4033} 4034 4035// FIXME: Use SmallString for accumulating string. 4036void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 4037 bool ExpandPointedToStructures, 4038 bool ExpandStructures, 4039 const FieldDecl *FD, 4040 bool OutermostType, 4041 bool EncodingProperty) const { 4042 if (T->getAs<BuiltinType>()) { 4043 if (FD && FD->isBitField()) 4044 return EncodeBitField(this, S, T, FD); 4045 S += ObjCEncodingForPrimitiveKind(this, T); 4046 return; 4047 } 4048 4049 if (const ComplexType *CT = T->getAs<ComplexType>()) { 4050 S += 'j'; 4051 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 4052 false); 4053 return; 4054 } 4055 4056 // encoding for pointer or r3eference types. 4057 QualType PointeeTy; 4058 if (const PointerType *PT = T->getAs<PointerType>()) { 4059 if (PT->isObjCSelType()) { 4060 S += ':'; 4061 return; 4062 } 4063 PointeeTy = PT->getPointeeType(); 4064 } 4065 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 4066 PointeeTy = RT->getPointeeType(); 4067 if (!PointeeTy.isNull()) { 4068 bool isReadOnly = false; 4069 // For historical/compatibility reasons, the read-only qualifier of the 4070 // pointee gets emitted _before_ the '^'. The read-only qualifier of 4071 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 4072 // Also, do not emit the 'r' for anything but the outermost type! 4073 if (isa<TypedefType>(T.getTypePtr())) { 4074 if (OutermostType && T.isConstQualified()) { 4075 isReadOnly = true; 4076 S += 'r'; 4077 } 4078 } else if (OutermostType) { 4079 QualType P = PointeeTy; 4080 while (P->getAs<PointerType>()) 4081 P = P->getAs<PointerType>()->getPointeeType(); 4082 if (P.isConstQualified()) { 4083 isReadOnly = true; 4084 S += 'r'; 4085 } 4086 } 4087 if (isReadOnly) { 4088 // Another legacy compatibility encoding. Some ObjC qualifier and type 4089 // combinations need to be rearranged. 4090 // Rewrite "in const" from "nr" to "rn" 4091 if (llvm::StringRef(S).endswith("nr")) 4092 S.replace(S.end()-2, S.end(), "rn"); 4093 } 4094 4095 if (PointeeTy->isCharType()) { 4096 // char pointer types should be encoded as '*' unless it is a 4097 // type that has been typedef'd to 'BOOL'. 4098 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 4099 S += '*'; 4100 return; 4101 } 4102 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 4103 // GCC binary compat: Need to convert "struct objc_class *" to "#". 4104 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 4105 S += '#'; 4106 return; 4107 } 4108 // GCC binary compat: Need to convert "struct objc_object *" to "@". 4109 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 4110 S += '@'; 4111 return; 4112 } 4113 // fall through... 4114 } 4115 S += '^'; 4116 getLegacyIntegralTypeEncoding(PointeeTy); 4117 4118 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 4119 NULL); 4120 return; 4121 } 4122 4123 if (const ArrayType *AT = 4124 // Ignore type qualifiers etc. 4125 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 4126 if (isa<IncompleteArrayType>(AT)) { 4127 // Incomplete arrays are encoded as a pointer to the array element. 4128 S += '^'; 4129 4130 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4131 false, ExpandStructures, FD); 4132 } else { 4133 S += '['; 4134 4135 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 4136 S += llvm::utostr(CAT->getSize().getZExtValue()); 4137 else { 4138 //Variable length arrays are encoded as a regular array with 0 elements. 4139 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 4140 S += '0'; 4141 } 4142 4143 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4144 false, ExpandStructures, FD); 4145 S += ']'; 4146 } 4147 return; 4148 } 4149 4150 if (T->getAs<FunctionType>()) { 4151 S += '?'; 4152 return; 4153 } 4154 4155 if (const RecordType *RTy = T->getAs<RecordType>()) { 4156 RecordDecl *RDecl = RTy->getDecl(); 4157 S += RDecl->isUnion() ? '(' : '{'; 4158 // Anonymous structures print as '?' 4159 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 4160 S += II->getName(); 4161 if (ClassTemplateSpecializationDecl *Spec 4162 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 4163 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 4164 std::string TemplateArgsStr 4165 = TemplateSpecializationType::PrintTemplateArgumentList( 4166 TemplateArgs.data(), 4167 TemplateArgs.size(), 4168 (*this).PrintingPolicy); 4169 4170 S += TemplateArgsStr; 4171 } 4172 } else { 4173 S += '?'; 4174 } 4175 if (ExpandStructures) { 4176 S += '='; 4177 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4178 FieldEnd = RDecl->field_end(); 4179 Field != FieldEnd; ++Field) { 4180 if (FD) { 4181 S += '"'; 4182 S += Field->getNameAsString(); 4183 S += '"'; 4184 } 4185 4186 // Special case bit-fields. 4187 if (Field->isBitField()) { 4188 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 4189 (*Field)); 4190 } else { 4191 QualType qt = Field->getType(); 4192 getLegacyIntegralTypeEncoding(qt); 4193 getObjCEncodingForTypeImpl(qt, S, false, true, 4194 FD); 4195 } 4196 } 4197 } 4198 S += RDecl->isUnion() ? ')' : '}'; 4199 return; 4200 } 4201 4202 if (T->isEnumeralType()) { 4203 if (FD && FD->isBitField()) 4204 EncodeBitField(this, S, T, FD); 4205 else 4206 S += 'i'; 4207 return; 4208 } 4209 4210 if (T->isBlockPointerType()) { 4211 S += "@?"; // Unlike a pointer-to-function, which is "^?". 4212 return; 4213 } 4214 4215 // Ignore protocol qualifiers when mangling at this level. 4216 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 4217 T = OT->getBaseType(); 4218 4219 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 4220 // @encode(class_name) 4221 ObjCInterfaceDecl *OI = OIT->getDecl(); 4222 S += '{'; 4223 const IdentifierInfo *II = OI->getIdentifier(); 4224 S += II->getName(); 4225 S += '='; 4226 llvm::SmallVector<ObjCIvarDecl*, 32> Ivars; 4227 DeepCollectObjCIvars(OI, true, Ivars); 4228 for (unsigned i = 0, e = Ivars.size(); i != e; ++i) { 4229 FieldDecl *Field = cast<FieldDecl>(Ivars[i]); 4230 if (Field->isBitField()) 4231 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, Field); 4232 else 4233 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, FD); 4234 } 4235 S += '}'; 4236 return; 4237 } 4238 4239 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 4240 if (OPT->isObjCIdType()) { 4241 S += '@'; 4242 return; 4243 } 4244 4245 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 4246 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 4247 // Since this is a binary compatibility issue, need to consult with runtime 4248 // folks. Fortunately, this is a *very* obsure construct. 4249 S += '#'; 4250 return; 4251 } 4252 4253 if (OPT->isObjCQualifiedIdType()) { 4254 getObjCEncodingForTypeImpl(getObjCIdType(), S, 4255 ExpandPointedToStructures, 4256 ExpandStructures, FD); 4257 if (FD || EncodingProperty) { 4258 // Note that we do extended encoding of protocol qualifer list 4259 // Only when doing ivar or property encoding. 4260 S += '"'; 4261 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4262 E = OPT->qual_end(); I != E; ++I) { 4263 S += '<'; 4264 S += (*I)->getNameAsString(); 4265 S += '>'; 4266 } 4267 S += '"'; 4268 } 4269 return; 4270 } 4271 4272 QualType PointeeTy = OPT->getPointeeType(); 4273 if (!EncodingProperty && 4274 isa<TypedefType>(PointeeTy.getTypePtr())) { 4275 // Another historical/compatibility reason. 4276 // We encode the underlying type which comes out as 4277 // {...}; 4278 S += '^'; 4279 getObjCEncodingForTypeImpl(PointeeTy, S, 4280 false, ExpandPointedToStructures, 4281 NULL); 4282 return; 4283 } 4284 4285 S += '@'; 4286 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 4287 S += '"'; 4288 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 4289 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4290 E = OPT->qual_end(); I != E; ++I) { 4291 S += '<'; 4292 S += (*I)->getNameAsString(); 4293 S += '>'; 4294 } 4295 S += '"'; 4296 } 4297 return; 4298 } 4299 4300 // gcc just blithely ignores member pointers. 4301 // TODO: maybe there should be a mangling for these 4302 if (T->getAs<MemberPointerType>()) 4303 return; 4304 4305 if (T->isVectorType()) { 4306 // This matches gcc's encoding, even though technically it is 4307 // insufficient. 4308 // FIXME. We should do a better job than gcc. 4309 return; 4310 } 4311 4312 assert(0 && "@encode for type not implemented!"); 4313} 4314 4315void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 4316 std::string& S) const { 4317 if (QT & Decl::OBJC_TQ_In) 4318 S += 'n'; 4319 if (QT & Decl::OBJC_TQ_Inout) 4320 S += 'N'; 4321 if (QT & Decl::OBJC_TQ_Out) 4322 S += 'o'; 4323 if (QT & Decl::OBJC_TQ_Bycopy) 4324 S += 'O'; 4325 if (QT & Decl::OBJC_TQ_Byref) 4326 S += 'R'; 4327 if (QT & Decl::OBJC_TQ_Oneway) 4328 S += 'V'; 4329} 4330 4331void ASTContext::setBuiltinVaListType(QualType T) { 4332 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 4333 4334 BuiltinVaListType = T; 4335} 4336 4337void ASTContext::setObjCIdType(QualType T) { 4338 ObjCIdTypedefType = T; 4339} 4340 4341void ASTContext::setObjCSelType(QualType T) { 4342 ObjCSelTypedefType = T; 4343} 4344 4345void ASTContext::setObjCProtoType(QualType QT) { 4346 ObjCProtoType = QT; 4347} 4348 4349void ASTContext::setObjCClassType(QualType T) { 4350 ObjCClassTypedefType = T; 4351} 4352 4353void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 4354 assert(ObjCConstantStringType.isNull() && 4355 "'NSConstantString' type already set!"); 4356 4357 ObjCConstantStringType = getObjCInterfaceType(Decl); 4358} 4359 4360/// \brief Retrieve the template name that corresponds to a non-empty 4361/// lookup. 4362TemplateName 4363ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 4364 UnresolvedSetIterator End) const { 4365 unsigned size = End - Begin; 4366 assert(size > 1 && "set is not overloaded!"); 4367 4368 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 4369 size * sizeof(FunctionTemplateDecl*)); 4370 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 4371 4372 NamedDecl **Storage = OT->getStorage(); 4373 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 4374 NamedDecl *D = *I; 4375 assert(isa<FunctionTemplateDecl>(D) || 4376 (isa<UsingShadowDecl>(D) && 4377 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 4378 *Storage++ = D; 4379 } 4380 4381 return TemplateName(OT); 4382} 4383 4384/// \brief Retrieve the template name that represents a qualified 4385/// template name such as \c std::vector. 4386TemplateName 4387ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 4388 bool TemplateKeyword, 4389 TemplateDecl *Template) const { 4390 // FIXME: Canonicalization? 4391 llvm::FoldingSetNodeID ID; 4392 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 4393 4394 void *InsertPos = 0; 4395 QualifiedTemplateName *QTN = 4396 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4397 if (!QTN) { 4398 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 4399 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 4400 } 4401 4402 return TemplateName(QTN); 4403} 4404 4405/// \brief Retrieve the template name that represents a dependent 4406/// template name such as \c MetaFun::template apply. 4407TemplateName 4408ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4409 const IdentifierInfo *Name) const { 4410 assert((!NNS || NNS->isDependent()) && 4411 "Nested name specifier must be dependent"); 4412 4413 llvm::FoldingSetNodeID ID; 4414 DependentTemplateName::Profile(ID, NNS, Name); 4415 4416 void *InsertPos = 0; 4417 DependentTemplateName *QTN = 4418 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4419 4420 if (QTN) 4421 return TemplateName(QTN); 4422 4423 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4424 if (CanonNNS == NNS) { 4425 QTN = new (*this,4) DependentTemplateName(NNS, Name); 4426 } else { 4427 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 4428 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 4429 DependentTemplateName *CheckQTN = 4430 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4431 assert(!CheckQTN && "Dependent type name canonicalization broken"); 4432 (void)CheckQTN; 4433 } 4434 4435 DependentTemplateNames.InsertNode(QTN, InsertPos); 4436 return TemplateName(QTN); 4437} 4438 4439/// \brief Retrieve the template name that represents a dependent 4440/// template name such as \c MetaFun::template operator+. 4441TemplateName 4442ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4443 OverloadedOperatorKind Operator) const { 4444 assert((!NNS || NNS->isDependent()) && 4445 "Nested name specifier must be dependent"); 4446 4447 llvm::FoldingSetNodeID ID; 4448 DependentTemplateName::Profile(ID, NNS, Operator); 4449 4450 void *InsertPos = 0; 4451 DependentTemplateName *QTN 4452 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4453 4454 if (QTN) 4455 return TemplateName(QTN); 4456 4457 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4458 if (CanonNNS == NNS) { 4459 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 4460 } else { 4461 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 4462 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 4463 4464 DependentTemplateName *CheckQTN 4465 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4466 assert(!CheckQTN && "Dependent template name canonicalization broken"); 4467 (void)CheckQTN; 4468 } 4469 4470 DependentTemplateNames.InsertNode(QTN, InsertPos); 4471 return TemplateName(QTN); 4472} 4473 4474TemplateName 4475ASTContext::getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 4476 const TemplateArgument &ArgPack) const { 4477 ASTContext &Self = const_cast<ASTContext &>(*this); 4478 llvm::FoldingSetNodeID ID; 4479 SubstTemplateTemplateParmPackStorage::Profile(ID, Self, Param, ArgPack); 4480 4481 void *InsertPos = 0; 4482 SubstTemplateTemplateParmPackStorage *Subst 4483 = SubstTemplateTemplateParmPacks.FindNodeOrInsertPos(ID, InsertPos); 4484 4485 if (!Subst) { 4486 Subst = new (*this) SubstTemplateTemplateParmPackStorage(Self, Param, 4487 ArgPack.pack_size(), 4488 ArgPack.pack_begin()); 4489 SubstTemplateTemplateParmPacks.InsertNode(Subst, InsertPos); 4490 } 4491 4492 return TemplateName(Subst); 4493} 4494 4495/// getFromTargetType - Given one of the integer types provided by 4496/// TargetInfo, produce the corresponding type. The unsigned @p Type 4497/// is actually a value of type @c TargetInfo::IntType. 4498CanQualType ASTContext::getFromTargetType(unsigned Type) const { 4499 switch (Type) { 4500 case TargetInfo::NoInt: return CanQualType(); 4501 case TargetInfo::SignedShort: return ShortTy; 4502 case TargetInfo::UnsignedShort: return UnsignedShortTy; 4503 case TargetInfo::SignedInt: return IntTy; 4504 case TargetInfo::UnsignedInt: return UnsignedIntTy; 4505 case TargetInfo::SignedLong: return LongTy; 4506 case TargetInfo::UnsignedLong: return UnsignedLongTy; 4507 case TargetInfo::SignedLongLong: return LongLongTy; 4508 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 4509 } 4510 4511 assert(false && "Unhandled TargetInfo::IntType value"); 4512 return CanQualType(); 4513} 4514 4515//===----------------------------------------------------------------------===// 4516// Type Predicates. 4517//===----------------------------------------------------------------------===// 4518 4519/// isObjCNSObjectType - Return true if this is an NSObject object using 4520/// NSObject attribute on a c-style pointer type. 4521/// FIXME - Make it work directly on types. 4522/// FIXME: Move to Type. 4523/// 4524bool ASTContext::isObjCNSObjectType(QualType Ty) const { 4525 if (const TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 4526 if (TypedefDecl *TD = TDT->getDecl()) 4527 if (TD->getAttr<ObjCNSObjectAttr>()) 4528 return true; 4529 } 4530 return false; 4531} 4532 4533/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 4534/// garbage collection attribute. 4535/// 4536Qualifiers::GC ASTContext::getObjCGCAttrKind(QualType Ty) const { 4537 if (getLangOptions().getGCMode() == LangOptions::NonGC) 4538 return Qualifiers::GCNone; 4539 4540 assert(getLangOptions().ObjC1); 4541 Qualifiers::GC GCAttrs = Ty.getObjCGCAttr(); 4542 4543 // Default behaviour under objective-C's gc is for ObjC pointers 4544 // (or pointers to them) be treated as though they were declared 4545 // as __strong. 4546 if (GCAttrs == Qualifiers::GCNone) { 4547 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 4548 return Qualifiers::Strong; 4549 else if (Ty->isPointerType()) 4550 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 4551 } else { 4552 // It's not valid to set GC attributes on anything that isn't a 4553 // pointer. 4554#ifndef NDEBUG 4555 QualType CT = Ty->getCanonicalTypeInternal(); 4556 while (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 4557 CT = AT->getElementType(); 4558 assert(CT->isAnyPointerType() || CT->isBlockPointerType()); 4559#endif 4560 } 4561 return GCAttrs; 4562} 4563 4564//===----------------------------------------------------------------------===// 4565// Type Compatibility Testing 4566//===----------------------------------------------------------------------===// 4567 4568/// areCompatVectorTypes - Return true if the two specified vector types are 4569/// compatible. 4570static bool areCompatVectorTypes(const VectorType *LHS, 4571 const VectorType *RHS) { 4572 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 4573 return LHS->getElementType() == RHS->getElementType() && 4574 LHS->getNumElements() == RHS->getNumElements(); 4575} 4576 4577bool ASTContext::areCompatibleVectorTypes(QualType FirstVec, 4578 QualType SecondVec) { 4579 assert(FirstVec->isVectorType() && "FirstVec should be a vector type"); 4580 assert(SecondVec->isVectorType() && "SecondVec should be a vector type"); 4581 4582 if (hasSameUnqualifiedType(FirstVec, SecondVec)) 4583 return true; 4584 4585 // Treat Neon vector types and most AltiVec vector types as if they are the 4586 // equivalent GCC vector types. 4587 const VectorType *First = FirstVec->getAs<VectorType>(); 4588 const VectorType *Second = SecondVec->getAs<VectorType>(); 4589 if (First->getNumElements() == Second->getNumElements() && 4590 hasSameType(First->getElementType(), Second->getElementType()) && 4591 First->getVectorKind() != VectorType::AltiVecPixel && 4592 First->getVectorKind() != VectorType::AltiVecBool && 4593 Second->getVectorKind() != VectorType::AltiVecPixel && 4594 Second->getVectorKind() != VectorType::AltiVecBool) 4595 return true; 4596 4597 return false; 4598} 4599 4600//===----------------------------------------------------------------------===// 4601// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 4602//===----------------------------------------------------------------------===// 4603 4604/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 4605/// inheritance hierarchy of 'rProto'. 4606bool 4607ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 4608 ObjCProtocolDecl *rProto) const { 4609 if (lProto == rProto) 4610 return true; 4611 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 4612 E = rProto->protocol_end(); PI != E; ++PI) 4613 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 4614 return true; 4615 return false; 4616} 4617 4618/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 4619/// return true if lhs's protocols conform to rhs's protocol; false 4620/// otherwise. 4621bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 4622 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 4623 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 4624 return false; 4625} 4626 4627/// ObjCQualifiedClassTypesAreCompatible - compare Class<p,...> and 4628/// Class<p1, ...>. 4629bool ASTContext::ObjCQualifiedClassTypesAreCompatible(QualType lhs, 4630 QualType rhs) { 4631 const ObjCObjectPointerType *lhsQID = lhs->getAs<ObjCObjectPointerType>(); 4632 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4633 assert ((lhsQID && rhsOPT) && "ObjCQualifiedClassTypesAreCompatible"); 4634 4635 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4636 E = lhsQID->qual_end(); I != E; ++I) { 4637 bool match = false; 4638 ObjCProtocolDecl *lhsProto = *I; 4639 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4640 E = rhsOPT->qual_end(); J != E; ++J) { 4641 ObjCProtocolDecl *rhsProto = *J; 4642 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto)) { 4643 match = true; 4644 break; 4645 } 4646 } 4647 if (!match) 4648 return false; 4649 } 4650 return true; 4651} 4652 4653/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 4654/// ObjCQualifiedIDType. 4655bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4656 bool compare) { 4657 // Allow id<P..> and an 'id' or void* type in all cases. 4658 if (lhs->isVoidPointerType() || 4659 lhs->isObjCIdType() || lhs->isObjCClassType()) 4660 return true; 4661 else if (rhs->isVoidPointerType() || 4662 rhs->isObjCIdType() || rhs->isObjCClassType()) 4663 return true; 4664 4665 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4666 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4667 4668 if (!rhsOPT) return false; 4669 4670 if (rhsOPT->qual_empty()) { 4671 // If the RHS is a unqualified interface pointer "NSString*", 4672 // make sure we check the class hierarchy. 4673 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4674 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4675 E = lhsQID->qual_end(); I != E; ++I) { 4676 // when comparing an id<P> on lhs with a static type on rhs, 4677 // see if static class implements all of id's protocols, directly or 4678 // through its super class and categories. 4679 if (!rhsID->ClassImplementsProtocol(*I, true)) 4680 return false; 4681 } 4682 } 4683 // If there are no qualifiers and no interface, we have an 'id'. 4684 return true; 4685 } 4686 // Both the right and left sides have qualifiers. 4687 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4688 E = lhsQID->qual_end(); I != E; ++I) { 4689 ObjCProtocolDecl *lhsProto = *I; 4690 bool match = false; 4691 4692 // when comparing an id<P> on lhs with a static type on rhs, 4693 // see if static class implements all of id's protocols, directly or 4694 // through its super class and categories. 4695 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4696 E = rhsOPT->qual_end(); J != E; ++J) { 4697 ObjCProtocolDecl *rhsProto = *J; 4698 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4699 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4700 match = true; 4701 break; 4702 } 4703 } 4704 // If the RHS is a qualified interface pointer "NSString<P>*", 4705 // make sure we check the class hierarchy. 4706 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4707 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4708 E = lhsQID->qual_end(); I != E; ++I) { 4709 // when comparing an id<P> on lhs with a static type on rhs, 4710 // see if static class implements all of id's protocols, directly or 4711 // through its super class and categories. 4712 if (rhsID->ClassImplementsProtocol(*I, true)) { 4713 match = true; 4714 break; 4715 } 4716 } 4717 } 4718 if (!match) 4719 return false; 4720 } 4721 4722 return true; 4723 } 4724 4725 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4726 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4727 4728 if (const ObjCObjectPointerType *lhsOPT = 4729 lhs->getAsObjCInterfacePointerType()) { 4730 // If both the right and left sides have qualifiers. 4731 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4732 E = lhsOPT->qual_end(); I != E; ++I) { 4733 ObjCProtocolDecl *lhsProto = *I; 4734 bool match = false; 4735 4736 // when comparing an id<P> on rhs with a static type on lhs, 4737 // see if static class implements all of id's protocols, directly or 4738 // through its super class and categories. 4739 // First, lhs protocols in the qualifier list must be found, direct 4740 // or indirect in rhs's qualifier list or it is a mismatch. 4741 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4742 E = rhsQID->qual_end(); J != E; ++J) { 4743 ObjCProtocolDecl *rhsProto = *J; 4744 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4745 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4746 match = true; 4747 break; 4748 } 4749 } 4750 if (!match) 4751 return false; 4752 } 4753 4754 // Static class's protocols, or its super class or category protocols 4755 // must be found, direct or indirect in rhs's qualifier list or it is a mismatch. 4756 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4757 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4758 CollectInheritedProtocols(lhsID, LHSInheritedProtocols); 4759 // This is rather dubious but matches gcc's behavior. If lhs has 4760 // no type qualifier and its class has no static protocol(s) 4761 // assume that it is mismatch. 4762 if (LHSInheritedProtocols.empty() && lhsOPT->qual_empty()) 4763 return false; 4764 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4765 LHSInheritedProtocols.begin(), 4766 E = LHSInheritedProtocols.end(); I != E; ++I) { 4767 bool match = false; 4768 ObjCProtocolDecl *lhsProto = (*I); 4769 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4770 E = rhsQID->qual_end(); J != E; ++J) { 4771 ObjCProtocolDecl *rhsProto = *J; 4772 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4773 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4774 match = true; 4775 break; 4776 } 4777 } 4778 if (!match) 4779 return false; 4780 } 4781 } 4782 return true; 4783 } 4784 return false; 4785} 4786 4787/// canAssignObjCInterfaces - Return true if the two interface types are 4788/// compatible for assignment from RHS to LHS. This handles validation of any 4789/// protocol qualifiers on the LHS or RHS. 4790/// 4791bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4792 const ObjCObjectPointerType *RHSOPT) { 4793 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4794 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4795 4796 // If either type represents the built-in 'id' or 'Class' types, return true. 4797 if (LHS->isObjCUnqualifiedIdOrClass() || 4798 RHS->isObjCUnqualifiedIdOrClass()) 4799 return true; 4800 4801 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 4802 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4803 QualType(RHSOPT,0), 4804 false); 4805 4806 if (LHS->isObjCQualifiedClass() && RHS->isObjCQualifiedClass()) 4807 return ObjCQualifiedClassTypesAreCompatible(QualType(LHSOPT,0), 4808 QualType(RHSOPT,0)); 4809 4810 // If we have 2 user-defined types, fall into that path. 4811 if (LHS->getInterface() && RHS->getInterface()) 4812 return canAssignObjCInterfaces(LHS, RHS); 4813 4814 return false; 4815} 4816 4817/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4818/// for providing type-safty for objective-c pointers used to pass/return 4819/// arguments in block literals. When passed as arguments, passing 'A*' where 4820/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4821/// not OK. For the return type, the opposite is not OK. 4822bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4823 const ObjCObjectPointerType *LHSOPT, 4824 const ObjCObjectPointerType *RHSOPT) { 4825 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4826 return true; 4827 4828 if (LHSOPT->isObjCBuiltinType()) { 4829 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4830 } 4831 4832 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4833 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4834 QualType(RHSOPT,0), 4835 false); 4836 4837 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4838 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4839 if (LHS && RHS) { // We have 2 user-defined types. 4840 if (LHS != RHS) { 4841 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4842 return false; 4843 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4844 return true; 4845 } 4846 else 4847 return true; 4848 } 4849 return false; 4850} 4851 4852/// getIntersectionOfProtocols - This routine finds the intersection of set 4853/// of protocols inherited from two distinct objective-c pointer objects. 4854/// It is used to build composite qualifier list of the composite type of 4855/// the conditional expression involving two objective-c pointer objects. 4856static 4857void getIntersectionOfProtocols(ASTContext &Context, 4858 const ObjCObjectPointerType *LHSOPT, 4859 const ObjCObjectPointerType *RHSOPT, 4860 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4861 4862 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4863 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4864 assert(LHS->getInterface() && "LHS must have an interface base"); 4865 assert(RHS->getInterface() && "RHS must have an interface base"); 4866 4867 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4868 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4869 if (LHSNumProtocols > 0) 4870 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4871 else { 4872 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4873 Context.CollectInheritedProtocols(LHS->getInterface(), 4874 LHSInheritedProtocols); 4875 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4876 LHSInheritedProtocols.end()); 4877 } 4878 4879 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4880 if (RHSNumProtocols > 0) { 4881 ObjCProtocolDecl **RHSProtocols = 4882 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4883 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4884 if (InheritedProtocolSet.count(RHSProtocols[i])) 4885 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4886 } 4887 else { 4888 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4889 Context.CollectInheritedProtocols(RHS->getInterface(), 4890 RHSInheritedProtocols); 4891 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4892 RHSInheritedProtocols.begin(), 4893 E = RHSInheritedProtocols.end(); I != E; ++I) 4894 if (InheritedProtocolSet.count((*I))) 4895 IntersectionOfProtocols.push_back((*I)); 4896 } 4897} 4898 4899/// areCommonBaseCompatible - Returns common base class of the two classes if 4900/// one found. Note that this is O'2 algorithm. But it will be called as the 4901/// last type comparison in a ?-exp of ObjC pointer types before a 4902/// warning is issued. So, its invokation is extremely rare. 4903QualType ASTContext::areCommonBaseCompatible( 4904 const ObjCObjectPointerType *Lptr, 4905 const ObjCObjectPointerType *Rptr) { 4906 const ObjCObjectType *LHS = Lptr->getObjectType(); 4907 const ObjCObjectType *RHS = Rptr->getObjectType(); 4908 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 4909 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 4910 if (!LDecl || !RDecl) 4911 return QualType(); 4912 4913 while ((LDecl = LDecl->getSuperClass())) { 4914 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 4915 if (canAssignObjCInterfaces(LHS, RHS)) { 4916 llvm::SmallVector<ObjCProtocolDecl *, 8> Protocols; 4917 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 4918 4919 QualType Result = QualType(LHS, 0); 4920 if (!Protocols.empty()) 4921 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 4922 Result = getObjCObjectPointerType(Result); 4923 return Result; 4924 } 4925 } 4926 4927 return QualType(); 4928} 4929 4930bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 4931 const ObjCObjectType *RHS) { 4932 assert(LHS->getInterface() && "LHS is not an interface type"); 4933 assert(RHS->getInterface() && "RHS is not an interface type"); 4934 4935 // Verify that the base decls are compatible: the RHS must be a subclass of 4936 // the LHS. 4937 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 4938 return false; 4939 4940 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4941 // protocol qualified at all, then we are good. 4942 if (LHS->getNumProtocols() == 0) 4943 return true; 4944 4945 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4946 // isn't a superset. 4947 if (RHS->getNumProtocols() == 0) 4948 return true; // FIXME: should return false! 4949 4950 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 4951 LHSPE = LHS->qual_end(); 4952 LHSPI != LHSPE; LHSPI++) { 4953 bool RHSImplementsProtocol = false; 4954 4955 // If the RHS doesn't implement the protocol on the left, the types 4956 // are incompatible. 4957 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 4958 RHSPE = RHS->qual_end(); 4959 RHSPI != RHSPE; RHSPI++) { 4960 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4961 RHSImplementsProtocol = true; 4962 break; 4963 } 4964 } 4965 // FIXME: For better diagnostics, consider passing back the protocol name. 4966 if (!RHSImplementsProtocol) 4967 return false; 4968 } 4969 // The RHS implements all protocols listed on the LHS. 4970 return true; 4971} 4972 4973bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4974 // get the "pointed to" types 4975 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4976 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4977 4978 if (!LHSOPT || !RHSOPT) 4979 return false; 4980 4981 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4982 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4983} 4984 4985bool ASTContext::canBindObjCObjectType(QualType To, QualType From) { 4986 return canAssignObjCInterfaces( 4987 getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(), 4988 getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>()); 4989} 4990 4991/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4992/// both shall have the identically qualified version of a compatible type. 4993/// C99 6.2.7p1: Two types have compatible types if their types are the 4994/// same. See 6.7.[2,3,5] for additional rules. 4995bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS, 4996 bool CompareUnqualified) { 4997 if (getLangOptions().CPlusPlus) 4998 return hasSameType(LHS, RHS); 4999 5000 return !mergeTypes(LHS, RHS, false, CompareUnqualified).isNull(); 5001} 5002 5003bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 5004 return !mergeTypes(LHS, RHS, true).isNull(); 5005} 5006 5007/// mergeTransparentUnionType - if T is a transparent union type and a member 5008/// of T is compatible with SubType, return the merged type, else return 5009/// QualType() 5010QualType ASTContext::mergeTransparentUnionType(QualType T, QualType SubType, 5011 bool OfBlockPointer, 5012 bool Unqualified) { 5013 if (const RecordType *UT = T->getAsUnionType()) { 5014 RecordDecl *UD = UT->getDecl(); 5015 if (UD->hasAttr<TransparentUnionAttr>()) { 5016 for (RecordDecl::field_iterator it = UD->field_begin(), 5017 itend = UD->field_end(); it != itend; ++it) { 5018 QualType ET = it->getType().getUnqualifiedType(); 5019 QualType MT = mergeTypes(ET, SubType, OfBlockPointer, Unqualified); 5020 if (!MT.isNull()) 5021 return MT; 5022 } 5023 } 5024 } 5025 5026 return QualType(); 5027} 5028 5029/// mergeFunctionArgumentTypes - merge two types which appear as function 5030/// argument types 5031QualType ASTContext::mergeFunctionArgumentTypes(QualType lhs, QualType rhs, 5032 bool OfBlockPointer, 5033 bool Unqualified) { 5034 // GNU extension: two types are compatible if they appear as a function 5035 // argument, one of the types is a transparent union type and the other 5036 // type is compatible with a union member 5037 QualType lmerge = mergeTransparentUnionType(lhs, rhs, OfBlockPointer, 5038 Unqualified); 5039 if (!lmerge.isNull()) 5040 return lmerge; 5041 5042 QualType rmerge = mergeTransparentUnionType(rhs, lhs, OfBlockPointer, 5043 Unqualified); 5044 if (!rmerge.isNull()) 5045 return rmerge; 5046 5047 return mergeTypes(lhs, rhs, OfBlockPointer, Unqualified); 5048} 5049 5050QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 5051 bool OfBlockPointer, 5052 bool Unqualified) { 5053 const FunctionType *lbase = lhs->getAs<FunctionType>(); 5054 const FunctionType *rbase = rhs->getAs<FunctionType>(); 5055 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 5056 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 5057 bool allLTypes = true; 5058 bool allRTypes = true; 5059 5060 // Check return type 5061 QualType retType; 5062 if (OfBlockPointer) { 5063 QualType RHS = rbase->getResultType(); 5064 QualType LHS = lbase->getResultType(); 5065 bool UnqualifiedResult = Unqualified; 5066 if (!UnqualifiedResult) 5067 UnqualifiedResult = (!RHS.hasQualifiers() && LHS.hasQualifiers()); 5068 retType = mergeTypes(RHS, LHS, true, UnqualifiedResult); 5069 } 5070 else 5071 retType = mergeTypes(lbase->getResultType(), rbase->getResultType(), false, 5072 Unqualified); 5073 if (retType.isNull()) return QualType(); 5074 5075 if (Unqualified) 5076 retType = retType.getUnqualifiedType(); 5077 5078 CanQualType LRetType = getCanonicalType(lbase->getResultType()); 5079 CanQualType RRetType = getCanonicalType(rbase->getResultType()); 5080 if (Unqualified) { 5081 LRetType = LRetType.getUnqualifiedType(); 5082 RRetType = RRetType.getUnqualifiedType(); 5083 } 5084 5085 if (getCanonicalType(retType) != LRetType) 5086 allLTypes = false; 5087 if (getCanonicalType(retType) != RRetType) 5088 allRTypes = false; 5089 5090 // FIXME: double check this 5091 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 5092 // rbase->getRegParmAttr() != 0 && 5093 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 5094 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 5095 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 5096 5097 // Compatible functions must have compatible calling conventions 5098 if (!isSameCallConv(lbaseInfo.getCC(), rbaseInfo.getCC())) 5099 return QualType(); 5100 5101 // Regparm is part of the calling convention. 5102 if (lbaseInfo.getRegParm() != rbaseInfo.getRegParm()) 5103 return QualType(); 5104 5105 // It's noreturn if either type is. 5106 // FIXME: some uses, e.g. conditional exprs, really want this to be 'both'. 5107 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 5108 if (NoReturn != lbaseInfo.getNoReturn()) 5109 allLTypes = false; 5110 if (NoReturn != rbaseInfo.getNoReturn()) 5111 allRTypes = false; 5112 5113 FunctionType::ExtInfo einfo(NoReturn, 5114 lbaseInfo.getRegParm(), 5115 lbaseInfo.getCC()); 5116 5117 if (lproto && rproto) { // two C99 style function prototypes 5118 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 5119 "C++ shouldn't be here"); 5120 unsigned lproto_nargs = lproto->getNumArgs(); 5121 unsigned rproto_nargs = rproto->getNumArgs(); 5122 5123 // Compatible functions must have the same number of arguments 5124 if (lproto_nargs != rproto_nargs) 5125 return QualType(); 5126 5127 // Variadic and non-variadic functions aren't compatible 5128 if (lproto->isVariadic() != rproto->isVariadic()) 5129 return QualType(); 5130 5131 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 5132 return QualType(); 5133 5134 // Check argument compatibility 5135 llvm::SmallVector<QualType, 10> types; 5136 for (unsigned i = 0; i < lproto_nargs; i++) { 5137 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 5138 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 5139 QualType argtype = mergeFunctionArgumentTypes(largtype, rargtype, 5140 OfBlockPointer, 5141 Unqualified); 5142 if (argtype.isNull()) return QualType(); 5143 5144 if (Unqualified) 5145 argtype = argtype.getUnqualifiedType(); 5146 5147 types.push_back(argtype); 5148 if (Unqualified) { 5149 largtype = largtype.getUnqualifiedType(); 5150 rargtype = rargtype.getUnqualifiedType(); 5151 } 5152 5153 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 5154 allLTypes = false; 5155 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 5156 allRTypes = false; 5157 } 5158 if (allLTypes) return lhs; 5159 if (allRTypes) return rhs; 5160 5161 FunctionProtoType::ExtProtoInfo EPI = lproto->getExtProtoInfo(); 5162 EPI.ExtInfo = einfo; 5163 return getFunctionType(retType, types.begin(), types.size(), EPI); 5164 } 5165 5166 if (lproto) allRTypes = false; 5167 if (rproto) allLTypes = false; 5168 5169 const FunctionProtoType *proto = lproto ? lproto : rproto; 5170 if (proto) { 5171 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 5172 if (proto->isVariadic()) return QualType(); 5173 // Check that the types are compatible with the types that 5174 // would result from default argument promotions (C99 6.7.5.3p15). 5175 // The only types actually affected are promotable integer 5176 // types and floats, which would be passed as a different 5177 // type depending on whether the prototype is visible. 5178 unsigned proto_nargs = proto->getNumArgs(); 5179 for (unsigned i = 0; i < proto_nargs; ++i) { 5180 QualType argTy = proto->getArgType(i); 5181 5182 // Look at the promotion type of enum types, since that is the type used 5183 // to pass enum values. 5184 if (const EnumType *Enum = argTy->getAs<EnumType>()) 5185 argTy = Enum->getDecl()->getPromotionType(); 5186 5187 if (argTy->isPromotableIntegerType() || 5188 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 5189 return QualType(); 5190 } 5191 5192 if (allLTypes) return lhs; 5193 if (allRTypes) return rhs; 5194 5195 FunctionProtoType::ExtProtoInfo EPI = proto->getExtProtoInfo(); 5196 EPI.ExtInfo = einfo; 5197 return getFunctionType(retType, proto->arg_type_begin(), 5198 proto->getNumArgs(), EPI); 5199 } 5200 5201 if (allLTypes) return lhs; 5202 if (allRTypes) return rhs; 5203 return getFunctionNoProtoType(retType, einfo); 5204} 5205 5206QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 5207 bool OfBlockPointer, 5208 bool Unqualified) { 5209 // C++ [expr]: If an expression initially has the type "reference to T", the 5210 // type is adjusted to "T" prior to any further analysis, the expression 5211 // designates the object or function denoted by the reference, and the 5212 // expression is an lvalue unless the reference is an rvalue reference and 5213 // the expression is a function call (possibly inside parentheses). 5214 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 5215 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 5216 5217 if (Unqualified) { 5218 LHS = LHS.getUnqualifiedType(); 5219 RHS = RHS.getUnqualifiedType(); 5220 } 5221 5222 QualType LHSCan = getCanonicalType(LHS), 5223 RHSCan = getCanonicalType(RHS); 5224 5225 // If two types are identical, they are compatible. 5226 if (LHSCan == RHSCan) 5227 return LHS; 5228 5229 // If the qualifiers are different, the types aren't compatible... mostly. 5230 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5231 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5232 if (LQuals != RQuals) { 5233 // If any of these qualifiers are different, we have a type 5234 // mismatch. 5235 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5236 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5237 return QualType(); 5238 5239 // Exactly one GC qualifier difference is allowed: __strong is 5240 // okay if the other type has no GC qualifier but is an Objective 5241 // C object pointer (i.e. implicitly strong by default). We fix 5242 // this by pretending that the unqualified type was actually 5243 // qualified __strong. 5244 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5245 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5246 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5247 5248 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5249 return QualType(); 5250 5251 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 5252 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 5253 } 5254 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 5255 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 5256 } 5257 return QualType(); 5258 } 5259 5260 // Okay, qualifiers are equal. 5261 5262 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 5263 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 5264 5265 // We want to consider the two function types to be the same for these 5266 // comparisons, just force one to the other. 5267 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 5268 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 5269 5270 // Same as above for arrays 5271 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 5272 LHSClass = Type::ConstantArray; 5273 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 5274 RHSClass = Type::ConstantArray; 5275 5276 // ObjCInterfaces are just specialized ObjCObjects. 5277 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 5278 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 5279 5280 // Canonicalize ExtVector -> Vector. 5281 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 5282 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 5283 5284 // If the canonical type classes don't match. 5285 if (LHSClass != RHSClass) { 5286 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 5287 // a signed integer type, or an unsigned integer type. 5288 // Compatibility is based on the underlying type, not the promotion 5289 // type. 5290 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 5291 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 5292 return RHS; 5293 } 5294 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 5295 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 5296 return LHS; 5297 } 5298 5299 return QualType(); 5300 } 5301 5302 // The canonical type classes match. 5303 switch (LHSClass) { 5304#define TYPE(Class, Base) 5305#define ABSTRACT_TYPE(Class, Base) 5306#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 5307#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 5308#define DEPENDENT_TYPE(Class, Base) case Type::Class: 5309#include "clang/AST/TypeNodes.def" 5310 assert(false && "Non-canonical and dependent types shouldn't get here"); 5311 return QualType(); 5312 5313 case Type::LValueReference: 5314 case Type::RValueReference: 5315 case Type::MemberPointer: 5316 assert(false && "C++ should never be in mergeTypes"); 5317 return QualType(); 5318 5319 case Type::ObjCInterface: 5320 case Type::IncompleteArray: 5321 case Type::VariableArray: 5322 case Type::FunctionProto: 5323 case Type::ExtVector: 5324 assert(false && "Types are eliminated above"); 5325 return QualType(); 5326 5327 case Type::Pointer: 5328 { 5329 // Merge two pointer types, while trying to preserve typedef info 5330 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 5331 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 5332 if (Unqualified) { 5333 LHSPointee = LHSPointee.getUnqualifiedType(); 5334 RHSPointee = RHSPointee.getUnqualifiedType(); 5335 } 5336 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, false, 5337 Unqualified); 5338 if (ResultType.isNull()) return QualType(); 5339 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5340 return LHS; 5341 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5342 return RHS; 5343 return getPointerType(ResultType); 5344 } 5345 case Type::BlockPointer: 5346 { 5347 // Merge two block pointer types, while trying to preserve typedef info 5348 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 5349 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 5350 if (Unqualified) { 5351 LHSPointee = LHSPointee.getUnqualifiedType(); 5352 RHSPointee = RHSPointee.getUnqualifiedType(); 5353 } 5354 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer, 5355 Unqualified); 5356 if (ResultType.isNull()) return QualType(); 5357 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5358 return LHS; 5359 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5360 return RHS; 5361 return getBlockPointerType(ResultType); 5362 } 5363 case Type::ConstantArray: 5364 { 5365 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 5366 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 5367 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 5368 return QualType(); 5369 5370 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 5371 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 5372 if (Unqualified) { 5373 LHSElem = LHSElem.getUnqualifiedType(); 5374 RHSElem = RHSElem.getUnqualifiedType(); 5375 } 5376 5377 QualType ResultType = mergeTypes(LHSElem, RHSElem, false, Unqualified); 5378 if (ResultType.isNull()) return QualType(); 5379 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5380 return LHS; 5381 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5382 return RHS; 5383 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 5384 ArrayType::ArraySizeModifier(), 0); 5385 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 5386 ArrayType::ArraySizeModifier(), 0); 5387 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 5388 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 5389 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5390 return LHS; 5391 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5392 return RHS; 5393 if (LVAT) { 5394 // FIXME: This isn't correct! But tricky to implement because 5395 // the array's size has to be the size of LHS, but the type 5396 // has to be different. 5397 return LHS; 5398 } 5399 if (RVAT) { 5400 // FIXME: This isn't correct! But tricky to implement because 5401 // the array's size has to be the size of RHS, but the type 5402 // has to be different. 5403 return RHS; 5404 } 5405 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 5406 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 5407 return getIncompleteArrayType(ResultType, 5408 ArrayType::ArraySizeModifier(), 0); 5409 } 5410 case Type::FunctionNoProto: 5411 return mergeFunctionTypes(LHS, RHS, OfBlockPointer, Unqualified); 5412 case Type::Record: 5413 case Type::Enum: 5414 return QualType(); 5415 case Type::Builtin: 5416 // Only exactly equal builtin types are compatible, which is tested above. 5417 return QualType(); 5418 case Type::Complex: 5419 // Distinct complex types are incompatible. 5420 return QualType(); 5421 case Type::Vector: 5422 // FIXME: The merged type should be an ExtVector! 5423 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 5424 RHSCan->getAs<VectorType>())) 5425 return LHS; 5426 return QualType(); 5427 case Type::ObjCObject: { 5428 // Check if the types are assignment compatible. 5429 // FIXME: This should be type compatibility, e.g. whether 5430 // "LHS x; RHS x;" at global scope is legal. 5431 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 5432 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 5433 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 5434 return LHS; 5435 5436 return QualType(); 5437 } 5438 case Type::ObjCObjectPointer: { 5439 if (OfBlockPointer) { 5440 if (canAssignObjCInterfacesInBlockPointer( 5441 LHS->getAs<ObjCObjectPointerType>(), 5442 RHS->getAs<ObjCObjectPointerType>())) 5443 return LHS; 5444 return QualType(); 5445 } 5446 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 5447 RHS->getAs<ObjCObjectPointerType>())) 5448 return LHS; 5449 5450 return QualType(); 5451 } 5452 } 5453 5454 return QualType(); 5455} 5456 5457/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 5458/// 'RHS' attributes and returns the merged version; including for function 5459/// return types. 5460QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 5461 QualType LHSCan = getCanonicalType(LHS), 5462 RHSCan = getCanonicalType(RHS); 5463 // If two types are identical, they are compatible. 5464 if (LHSCan == RHSCan) 5465 return LHS; 5466 if (RHSCan->isFunctionType()) { 5467 if (!LHSCan->isFunctionType()) 5468 return QualType(); 5469 QualType OldReturnType = 5470 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 5471 QualType NewReturnType = 5472 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 5473 QualType ResReturnType = 5474 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 5475 if (ResReturnType.isNull()) 5476 return QualType(); 5477 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 5478 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 5479 // In either case, use OldReturnType to build the new function type. 5480 const FunctionType *F = LHS->getAs<FunctionType>(); 5481 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 5482 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 5483 EPI.ExtInfo = getFunctionExtInfo(LHS); 5484 QualType ResultType 5485 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 5486 FPT->getNumArgs(), EPI); 5487 return ResultType; 5488 } 5489 } 5490 return QualType(); 5491 } 5492 5493 // If the qualifiers are different, the types can still be merged. 5494 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5495 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5496 if (LQuals != RQuals) { 5497 // If any of these qualifiers are different, we have a type mismatch. 5498 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5499 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5500 return QualType(); 5501 5502 // Exactly one GC qualifier difference is allowed: __strong is 5503 // okay if the other type has no GC qualifier but is an Objective 5504 // C object pointer (i.e. implicitly strong by default). We fix 5505 // this by pretending that the unqualified type was actually 5506 // qualified __strong. 5507 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5508 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5509 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5510 5511 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5512 return QualType(); 5513 5514 if (GC_L == Qualifiers::Strong) 5515 return LHS; 5516 if (GC_R == Qualifiers::Strong) 5517 return RHS; 5518 return QualType(); 5519 } 5520 5521 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 5522 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5523 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5524 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 5525 if (ResQT == LHSBaseQT) 5526 return LHS; 5527 if (ResQT == RHSBaseQT) 5528 return RHS; 5529 } 5530 return QualType(); 5531} 5532 5533//===----------------------------------------------------------------------===// 5534// Integer Predicates 5535//===----------------------------------------------------------------------===// 5536 5537unsigned ASTContext::getIntWidth(QualType T) const { 5538 if (const EnumType *ET = dyn_cast<EnumType>(T)) 5539 T = ET->getDecl()->getIntegerType(); 5540 if (T->isBooleanType()) 5541 return 1; 5542 // For builtin types, just use the standard type sizing method 5543 return (unsigned)getTypeSize(T); 5544} 5545 5546QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 5547 assert(T->hasSignedIntegerRepresentation() && "Unexpected type"); 5548 5549 // Turn <4 x signed int> -> <4 x unsigned int> 5550 if (const VectorType *VTy = T->getAs<VectorType>()) 5551 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 5552 VTy->getNumElements(), VTy->getVectorKind()); 5553 5554 // For enums, we return the unsigned version of the base type. 5555 if (const EnumType *ETy = T->getAs<EnumType>()) 5556 T = ETy->getDecl()->getIntegerType(); 5557 5558 const BuiltinType *BTy = T->getAs<BuiltinType>(); 5559 assert(BTy && "Unexpected signed integer type"); 5560 switch (BTy->getKind()) { 5561 case BuiltinType::Char_S: 5562 case BuiltinType::SChar: 5563 return UnsignedCharTy; 5564 case BuiltinType::Short: 5565 return UnsignedShortTy; 5566 case BuiltinType::Int: 5567 return UnsignedIntTy; 5568 case BuiltinType::Long: 5569 return UnsignedLongTy; 5570 case BuiltinType::LongLong: 5571 return UnsignedLongLongTy; 5572 case BuiltinType::Int128: 5573 return UnsignedInt128Ty; 5574 default: 5575 assert(0 && "Unexpected signed integer type"); 5576 return QualType(); 5577 } 5578} 5579 5580ASTMutationListener::~ASTMutationListener() { } 5581 5582 5583//===----------------------------------------------------------------------===// 5584// Builtin Type Computation 5585//===----------------------------------------------------------------------===// 5586 5587/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 5588/// pointer over the consumed characters. This returns the resultant type. If 5589/// AllowTypeModifiers is false then modifier like * are not parsed, just basic 5590/// types. This allows "v2i*" to be parsed as a pointer to a v2i instead of 5591/// a vector of "i*". 5592/// 5593/// RequiresICE is filled in on return to indicate whether the value is required 5594/// to be an Integer Constant Expression. 5595static QualType DecodeTypeFromStr(const char *&Str, const ASTContext &Context, 5596 ASTContext::GetBuiltinTypeError &Error, 5597 bool &RequiresICE, 5598 bool AllowTypeModifiers) { 5599 // Modifiers. 5600 int HowLong = 0; 5601 bool Signed = false, Unsigned = false; 5602 RequiresICE = false; 5603 5604 // Read the prefixed modifiers first. 5605 bool Done = false; 5606 while (!Done) { 5607 switch (*Str++) { 5608 default: Done = true; --Str; break; 5609 case 'I': 5610 RequiresICE = true; 5611 break; 5612 case 'S': 5613 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 5614 assert(!Signed && "Can't use 'S' modifier multiple times!"); 5615 Signed = true; 5616 break; 5617 case 'U': 5618 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 5619 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 5620 Unsigned = true; 5621 break; 5622 case 'L': 5623 assert(HowLong <= 2 && "Can't have LLLL modifier"); 5624 ++HowLong; 5625 break; 5626 } 5627 } 5628 5629 QualType Type; 5630 5631 // Read the base type. 5632 switch (*Str++) { 5633 default: assert(0 && "Unknown builtin type letter!"); 5634 case 'v': 5635 assert(HowLong == 0 && !Signed && !Unsigned && 5636 "Bad modifiers used with 'v'!"); 5637 Type = Context.VoidTy; 5638 break; 5639 case 'f': 5640 assert(HowLong == 0 && !Signed && !Unsigned && 5641 "Bad modifiers used with 'f'!"); 5642 Type = Context.FloatTy; 5643 break; 5644 case 'd': 5645 assert(HowLong < 2 && !Signed && !Unsigned && 5646 "Bad modifiers used with 'd'!"); 5647 if (HowLong) 5648 Type = Context.LongDoubleTy; 5649 else 5650 Type = Context.DoubleTy; 5651 break; 5652 case 's': 5653 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 5654 if (Unsigned) 5655 Type = Context.UnsignedShortTy; 5656 else 5657 Type = Context.ShortTy; 5658 break; 5659 case 'i': 5660 if (HowLong == 3) 5661 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 5662 else if (HowLong == 2) 5663 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 5664 else if (HowLong == 1) 5665 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 5666 else 5667 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 5668 break; 5669 case 'c': 5670 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 5671 if (Signed) 5672 Type = Context.SignedCharTy; 5673 else if (Unsigned) 5674 Type = Context.UnsignedCharTy; 5675 else 5676 Type = Context.CharTy; 5677 break; 5678 case 'b': // boolean 5679 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 5680 Type = Context.BoolTy; 5681 break; 5682 case 'z': // size_t. 5683 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 5684 Type = Context.getSizeType(); 5685 break; 5686 case 'F': 5687 Type = Context.getCFConstantStringType(); 5688 break; 5689 case 'G': 5690 Type = Context.getObjCIdType(); 5691 break; 5692 case 'H': 5693 Type = Context.getObjCSelType(); 5694 break; 5695 case 'a': 5696 Type = Context.getBuiltinVaListType(); 5697 assert(!Type.isNull() && "builtin va list type not initialized!"); 5698 break; 5699 case 'A': 5700 // This is a "reference" to a va_list; however, what exactly 5701 // this means depends on how va_list is defined. There are two 5702 // different kinds of va_list: ones passed by value, and ones 5703 // passed by reference. An example of a by-value va_list is 5704 // x86, where va_list is a char*. An example of by-ref va_list 5705 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 5706 // we want this argument to be a char*&; for x86-64, we want 5707 // it to be a __va_list_tag*. 5708 Type = Context.getBuiltinVaListType(); 5709 assert(!Type.isNull() && "builtin va list type not initialized!"); 5710 if (Type->isArrayType()) 5711 Type = Context.getArrayDecayedType(Type); 5712 else 5713 Type = Context.getLValueReferenceType(Type); 5714 break; 5715 case 'V': { 5716 char *End; 5717 unsigned NumElements = strtoul(Str, &End, 10); 5718 assert(End != Str && "Missing vector size"); 5719 Str = End; 5720 5721 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, 5722 RequiresICE, false); 5723 assert(!RequiresICE && "Can't require vector ICE"); 5724 5725 // TODO: No way to make AltiVec vectors in builtins yet. 5726 Type = Context.getVectorType(ElementType, NumElements, 5727 VectorType::GenericVector); 5728 break; 5729 } 5730 case 'X': { 5731 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, RequiresICE, 5732 false); 5733 assert(!RequiresICE && "Can't require complex ICE"); 5734 Type = Context.getComplexType(ElementType); 5735 break; 5736 } 5737 case 'P': 5738 Type = Context.getFILEType(); 5739 if (Type.isNull()) { 5740 Error = ASTContext::GE_Missing_stdio; 5741 return QualType(); 5742 } 5743 break; 5744 case 'J': 5745 if (Signed) 5746 Type = Context.getsigjmp_bufType(); 5747 else 5748 Type = Context.getjmp_bufType(); 5749 5750 if (Type.isNull()) { 5751 Error = ASTContext::GE_Missing_setjmp; 5752 return QualType(); 5753 } 5754 break; 5755 } 5756 5757 // If there are modifiers and if we're allowed to parse them, go for it. 5758 Done = !AllowTypeModifiers; 5759 while (!Done) { 5760 switch (char c = *Str++) { 5761 default: Done = true; --Str; break; 5762 case '*': 5763 case '&': { 5764 // Both pointers and references can have their pointee types 5765 // qualified with an address space. 5766 char *End; 5767 unsigned AddrSpace = strtoul(Str, &End, 10); 5768 if (End != Str && AddrSpace != 0) { 5769 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 5770 Str = End; 5771 } 5772 if (c == '*') 5773 Type = Context.getPointerType(Type); 5774 else 5775 Type = Context.getLValueReferenceType(Type); 5776 break; 5777 } 5778 // FIXME: There's no way to have a built-in with an rvalue ref arg. 5779 case 'C': 5780 Type = Type.withConst(); 5781 break; 5782 case 'D': 5783 Type = Context.getVolatileType(Type); 5784 break; 5785 } 5786 } 5787 5788 assert((!RequiresICE || Type->isIntegralOrEnumerationType()) && 5789 "Integer constant 'I' type must be an integer"); 5790 5791 return Type; 5792} 5793 5794/// GetBuiltinType - Return the type for the specified builtin. 5795QualType ASTContext::GetBuiltinType(unsigned Id, 5796 GetBuiltinTypeError &Error, 5797 unsigned *IntegerConstantArgs) const { 5798 const char *TypeStr = BuiltinInfo.GetTypeString(Id); 5799 5800 llvm::SmallVector<QualType, 8> ArgTypes; 5801 5802 bool RequiresICE = false; 5803 Error = GE_None; 5804 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error, 5805 RequiresICE, true); 5806 if (Error != GE_None) 5807 return QualType(); 5808 5809 assert(!RequiresICE && "Result of intrinsic cannot be required to be an ICE"); 5810 5811 while (TypeStr[0] && TypeStr[0] != '.') { 5812 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error, RequiresICE, true); 5813 if (Error != GE_None) 5814 return QualType(); 5815 5816 // If this argument is required to be an IntegerConstantExpression and the 5817 // caller cares, fill in the bitmask we return. 5818 if (RequiresICE && IntegerConstantArgs) 5819 *IntegerConstantArgs |= 1 << ArgTypes.size(); 5820 5821 // Do array -> pointer decay. The builtin should use the decayed type. 5822 if (Ty->isArrayType()) 5823 Ty = getArrayDecayedType(Ty); 5824 5825 ArgTypes.push_back(Ty); 5826 } 5827 5828 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 5829 "'.' should only occur at end of builtin type list!"); 5830 5831 FunctionType::ExtInfo EI; 5832 if (BuiltinInfo.isNoReturn(Id)) EI = EI.withNoReturn(true); 5833 5834 bool Variadic = (TypeStr[0] == '.'); 5835 5836 // We really shouldn't be making a no-proto type here, especially in C++. 5837 if (ArgTypes.empty() && Variadic) 5838 return getFunctionNoProtoType(ResType, EI); 5839 5840 FunctionProtoType::ExtProtoInfo EPI; 5841 EPI.ExtInfo = EI; 5842 EPI.Variadic = Variadic; 5843 5844 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), EPI); 5845} 5846 5847GVALinkage ASTContext::GetGVALinkageForFunction(const FunctionDecl *FD) { 5848 GVALinkage External = GVA_StrongExternal; 5849 5850 Linkage L = FD->getLinkage(); 5851 switch (L) { 5852 case NoLinkage: 5853 case InternalLinkage: 5854 case UniqueExternalLinkage: 5855 return GVA_Internal; 5856 5857 case ExternalLinkage: 5858 switch (FD->getTemplateSpecializationKind()) { 5859 case TSK_Undeclared: 5860 case TSK_ExplicitSpecialization: 5861 External = GVA_StrongExternal; 5862 break; 5863 5864 case TSK_ExplicitInstantiationDefinition: 5865 return GVA_ExplicitTemplateInstantiation; 5866 5867 case TSK_ExplicitInstantiationDeclaration: 5868 case TSK_ImplicitInstantiation: 5869 External = GVA_TemplateInstantiation; 5870 break; 5871 } 5872 } 5873 5874 if (!FD->isInlined()) 5875 return External; 5876 5877 if (!getLangOptions().CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 5878 // GNU or C99 inline semantics. Determine whether this symbol should be 5879 // externally visible. 5880 if (FD->isInlineDefinitionExternallyVisible()) 5881 return External; 5882 5883 // C99 inline semantics, where the symbol is not externally visible. 5884 return GVA_C99Inline; 5885 } 5886 5887 // C++0x [temp.explicit]p9: 5888 // [ Note: The intent is that an inline function that is the subject of 5889 // an explicit instantiation declaration will still be implicitly 5890 // instantiated when used so that the body can be considered for 5891 // inlining, but that no out-of-line copy of the inline function would be 5892 // generated in the translation unit. -- end note ] 5893 if (FD->getTemplateSpecializationKind() 5894 == TSK_ExplicitInstantiationDeclaration) 5895 return GVA_C99Inline; 5896 5897 return GVA_CXXInline; 5898} 5899 5900GVALinkage ASTContext::GetGVALinkageForVariable(const VarDecl *VD) { 5901 // If this is a static data member, compute the kind of template 5902 // specialization. Otherwise, this variable is not part of a 5903 // template. 5904 TemplateSpecializationKind TSK = TSK_Undeclared; 5905 if (VD->isStaticDataMember()) 5906 TSK = VD->getTemplateSpecializationKind(); 5907 5908 Linkage L = VD->getLinkage(); 5909 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 5910 VD->getType()->getLinkage() == UniqueExternalLinkage) 5911 L = UniqueExternalLinkage; 5912 5913 switch (L) { 5914 case NoLinkage: 5915 case InternalLinkage: 5916 case UniqueExternalLinkage: 5917 return GVA_Internal; 5918 5919 case ExternalLinkage: 5920 switch (TSK) { 5921 case TSK_Undeclared: 5922 case TSK_ExplicitSpecialization: 5923 return GVA_StrongExternal; 5924 5925 case TSK_ExplicitInstantiationDeclaration: 5926 llvm_unreachable("Variable should not be instantiated"); 5927 // Fall through to treat this like any other instantiation. 5928 5929 case TSK_ExplicitInstantiationDefinition: 5930 return GVA_ExplicitTemplateInstantiation; 5931 5932 case TSK_ImplicitInstantiation: 5933 return GVA_TemplateInstantiation; 5934 } 5935 } 5936 5937 return GVA_StrongExternal; 5938} 5939 5940bool ASTContext::DeclMustBeEmitted(const Decl *D) { 5941 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 5942 if (!VD->isFileVarDecl()) 5943 return false; 5944 } else if (!isa<FunctionDecl>(D)) 5945 return false; 5946 5947 // Weak references don't produce any output by themselves. 5948 if (D->hasAttr<WeakRefAttr>()) 5949 return false; 5950 5951 // Aliases and used decls are required. 5952 if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>()) 5953 return true; 5954 5955 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 5956 // Forward declarations aren't required. 5957 if (!FD->isThisDeclarationADefinition()) 5958 return false; 5959 5960 // Constructors and destructors are required. 5961 if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>()) 5962 return true; 5963 5964 // The key function for a class is required. 5965 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 5966 const CXXRecordDecl *RD = MD->getParent(); 5967 if (MD->isOutOfLine() && RD->isDynamicClass()) { 5968 const CXXMethodDecl *KeyFunc = getKeyFunction(RD); 5969 if (KeyFunc && KeyFunc->getCanonicalDecl() == MD->getCanonicalDecl()) 5970 return true; 5971 } 5972 } 5973 5974 GVALinkage Linkage = GetGVALinkageForFunction(FD); 5975 5976 // static, static inline, always_inline, and extern inline functions can 5977 // always be deferred. Normal inline functions can be deferred in C99/C++. 5978 // Implicit template instantiations can also be deferred in C++. 5979 if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 5980 Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 5981 return false; 5982 return true; 5983 } 5984 5985 const VarDecl *VD = cast<VarDecl>(D); 5986 assert(VD->isFileVarDecl() && "Expected file scoped var"); 5987 5988 if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) 5989 return false; 5990 5991 // Structs that have non-trivial constructors or destructors are required. 5992 5993 // FIXME: Handle references. 5994 if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { 5995 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 5996 if (RD->hasDefinition() && 5997 (!RD->hasTrivialConstructor() || !RD->hasTrivialDestructor())) 5998 return true; 5999 } 6000 } 6001 6002 GVALinkage L = GetGVALinkageForVariable(VD); 6003 if (L == GVA_Internal || L == GVA_TemplateInstantiation) { 6004 if (!(VD->getInit() && VD->getInit()->HasSideEffects(*this))) 6005 return false; 6006 } 6007 6008 return true; 6009} 6010 6011CallingConv ASTContext::getDefaultMethodCallConv() { 6012 // Pass through to the C++ ABI object 6013 return ABI->getDefaultMethodCallConv(); 6014} 6015 6016bool ASTContext::isNearlyEmpty(const CXXRecordDecl *RD) const { 6017 // Pass through to the C++ ABI object 6018 return ABI->isNearlyEmpty(RD); 6019} 6020 6021MangleContext *ASTContext::createMangleContext() { 6022 switch (Target.getCXXABI()) { 6023 case CXXABI_ARM: 6024 case CXXABI_Itanium: 6025 return createItaniumMangleContext(*this, getDiagnostics()); 6026 case CXXABI_Microsoft: 6027 return createMicrosoftMangleContext(*this, getDiagnostics()); 6028 } 6029 assert(0 && "Unsupported ABI"); 6030 return 0; 6031} 6032 6033CXXABI::~CXXABI() {} 6034