ASTContext.cpp revision 7c3179cf463c3b3b8c21dbb955f933ba50b74f28
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 CallConv = Info.getCC(); 1866 // Unique functions, to guarantee there is only one function of a particular 1867 // structure. 1868 llvm::FoldingSetNodeID ID; 1869 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1870 1871 void *InsertPos = 0; 1872 if (FunctionNoProtoType *FT = 1873 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1874 return QualType(FT, 0); 1875 1876 QualType Canonical; 1877 if (!ResultTy.isCanonical() || 1878 getCanonicalCallConv(CallConv) != CallConv) { 1879 Canonical = 1880 getFunctionNoProtoType(getCanonicalType(ResultTy), 1881 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1882 1883 // Get the new insert position for the node we care about. 1884 FunctionNoProtoType *NewIP = 1885 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1886 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1887 } 1888 1889 FunctionNoProtoType *New = new (*this, TypeAlignment) 1890 FunctionNoProtoType(ResultTy, Canonical, Info); 1891 Types.push_back(New); 1892 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1893 return QualType(New, 0); 1894} 1895 1896/// getFunctionType - Return a normal function type with a typed argument 1897/// list. isVariadic indicates whether the argument list includes '...'. 1898QualType 1899ASTContext::getFunctionType(QualType ResultTy, 1900 const QualType *ArgArray, unsigned NumArgs, 1901 const FunctionProtoType::ExtProtoInfo &EPI) const { 1902 // Unique functions, to guarantee there is only one function of a particular 1903 // structure. 1904 llvm::FoldingSetNodeID ID; 1905 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, EPI); 1906 1907 void *InsertPos = 0; 1908 if (FunctionProtoType *FTP = 1909 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1910 return QualType(FTP, 0); 1911 1912 // Determine whether the type being created is already canonical or not. 1913 bool isCanonical = !EPI.HasExceptionSpec && ResultTy.isCanonical(); 1914 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1915 if (!ArgArray[i].isCanonicalAsParam()) 1916 isCanonical = false; 1917 1918 const CallingConv CallConv = EPI.ExtInfo.getCC(); 1919 1920 // If this type isn't canonical, get the canonical version of it. 1921 // The exception spec is not part of the canonical type. 1922 QualType Canonical; 1923 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1924 llvm::SmallVector<QualType, 16> CanonicalArgs; 1925 CanonicalArgs.reserve(NumArgs); 1926 for (unsigned i = 0; i != NumArgs; ++i) 1927 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1928 1929 FunctionProtoType::ExtProtoInfo CanonicalEPI = EPI; 1930 if (CanonicalEPI.HasExceptionSpec) { 1931 CanonicalEPI.HasExceptionSpec = false; 1932 CanonicalEPI.HasAnyExceptionSpec = false; 1933 CanonicalEPI.NumExceptions = 0; 1934 } 1935 CanonicalEPI.ExtInfo 1936 = CanonicalEPI.ExtInfo.withCallingConv(getCanonicalCallConv(CallConv)); 1937 1938 Canonical = getFunctionType(getCanonicalType(ResultTy), 1939 CanonicalArgs.data(), NumArgs, 1940 CanonicalEPI); 1941 1942 // Get the new insert position for the node we care about. 1943 FunctionProtoType *NewIP = 1944 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1945 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1946 } 1947 1948 // FunctionProtoType objects are allocated with extra bytes after them 1949 // for two variable size arrays (for parameter and exception types) at the 1950 // end of them. 1951 size_t Size = sizeof(FunctionProtoType) + 1952 NumArgs * sizeof(QualType) + 1953 EPI.NumExceptions * sizeof(QualType); 1954 FunctionProtoType *FTP = (FunctionProtoType*) Allocate(Size, TypeAlignment); 1955 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, Canonical, EPI); 1956 Types.push_back(FTP); 1957 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1958 return QualType(FTP, 0); 1959} 1960 1961#ifndef NDEBUG 1962static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1963 if (!isa<CXXRecordDecl>(D)) return false; 1964 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1965 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1966 return true; 1967 if (RD->getDescribedClassTemplate() && 1968 !isa<ClassTemplateSpecializationDecl>(RD)) 1969 return true; 1970 return false; 1971} 1972#endif 1973 1974/// getInjectedClassNameType - Return the unique reference to the 1975/// injected class name type for the specified templated declaration. 1976QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1977 QualType TST) const { 1978 assert(NeedsInjectedClassNameType(Decl)); 1979 if (Decl->TypeForDecl) { 1980 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1981 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDeclaration()) { 1982 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1983 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1984 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1985 } else { 1986 Type *newType = 1987 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 1988 Decl->TypeForDecl = newType; 1989 Types.push_back(newType); 1990 } 1991 return QualType(Decl->TypeForDecl, 0); 1992} 1993 1994/// getTypeDeclType - Return the unique reference to the type for the 1995/// specified type declaration. 1996QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) const { 1997 assert(Decl && "Passed null for Decl param"); 1998 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 1999 2000 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 2001 return getTypedefType(Typedef); 2002 2003 assert(!isa<TemplateTypeParmDecl>(Decl) && 2004 "Template type parameter types are always available."); 2005 2006 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 2007 assert(!Record->getPreviousDeclaration() && 2008 "struct/union has previous declaration"); 2009 assert(!NeedsInjectedClassNameType(Record)); 2010 return getRecordType(Record); 2011 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 2012 assert(!Enum->getPreviousDeclaration() && 2013 "enum has previous declaration"); 2014 return getEnumType(Enum); 2015 } else if (const UnresolvedUsingTypenameDecl *Using = 2016 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 2017 Type *newType = new (*this, TypeAlignment) UnresolvedUsingType(Using); 2018 Decl->TypeForDecl = newType; 2019 Types.push_back(newType); 2020 } else 2021 llvm_unreachable("TypeDecl without a type?"); 2022 2023 return QualType(Decl->TypeForDecl, 0); 2024} 2025 2026/// getTypedefType - Return the unique reference to the type for the 2027/// specified typename decl. 2028QualType 2029ASTContext::getTypedefType(const TypedefDecl *Decl, QualType Canonical) const { 2030 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2031 2032 if (Canonical.isNull()) 2033 Canonical = getCanonicalType(Decl->getUnderlyingType()); 2034 TypedefType *newType = new(*this, TypeAlignment) 2035 TypedefType(Type::Typedef, Decl, Canonical); 2036 Decl->TypeForDecl = newType; 2037 Types.push_back(newType); 2038 return QualType(newType, 0); 2039} 2040 2041QualType ASTContext::getRecordType(const RecordDecl *Decl) const { 2042 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2043 2044 if (const RecordDecl *PrevDecl = Decl->getPreviousDeclaration()) 2045 if (PrevDecl->TypeForDecl) 2046 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2047 2048 RecordType *newType = new (*this, TypeAlignment) RecordType(Decl); 2049 Decl->TypeForDecl = newType; 2050 Types.push_back(newType); 2051 return QualType(newType, 0); 2052} 2053 2054QualType ASTContext::getEnumType(const EnumDecl *Decl) const { 2055 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2056 2057 if (const EnumDecl *PrevDecl = Decl->getPreviousDeclaration()) 2058 if (PrevDecl->TypeForDecl) 2059 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2060 2061 EnumType *newType = new (*this, TypeAlignment) EnumType(Decl); 2062 Decl->TypeForDecl = newType; 2063 Types.push_back(newType); 2064 return QualType(newType, 0); 2065} 2066 2067QualType ASTContext::getAttributedType(AttributedType::Kind attrKind, 2068 QualType modifiedType, 2069 QualType equivalentType) { 2070 llvm::FoldingSetNodeID id; 2071 AttributedType::Profile(id, attrKind, modifiedType, equivalentType); 2072 2073 void *insertPos = 0; 2074 AttributedType *type = AttributedTypes.FindNodeOrInsertPos(id, insertPos); 2075 if (type) return QualType(type, 0); 2076 2077 QualType canon = getCanonicalType(equivalentType); 2078 type = new (*this, TypeAlignment) 2079 AttributedType(canon, attrKind, modifiedType, equivalentType); 2080 2081 Types.push_back(type); 2082 AttributedTypes.InsertNode(type, insertPos); 2083 2084 return QualType(type, 0); 2085} 2086 2087 2088/// \brief Retrieve a substitution-result type. 2089QualType 2090ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 2091 QualType Replacement) const { 2092 assert(Replacement.isCanonical() 2093 && "replacement types must always be canonical"); 2094 2095 llvm::FoldingSetNodeID ID; 2096 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 2097 void *InsertPos = 0; 2098 SubstTemplateTypeParmType *SubstParm 2099 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2100 2101 if (!SubstParm) { 2102 SubstParm = new (*this, TypeAlignment) 2103 SubstTemplateTypeParmType(Parm, Replacement); 2104 Types.push_back(SubstParm); 2105 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2106 } 2107 2108 return QualType(SubstParm, 0); 2109} 2110 2111/// \brief Retrieve a 2112QualType ASTContext::getSubstTemplateTypeParmPackType( 2113 const TemplateTypeParmType *Parm, 2114 const TemplateArgument &ArgPack) { 2115#ifndef NDEBUG 2116 for (TemplateArgument::pack_iterator P = ArgPack.pack_begin(), 2117 PEnd = ArgPack.pack_end(); 2118 P != PEnd; ++P) { 2119 assert(P->getKind() == TemplateArgument::Type &&"Pack contains a non-type"); 2120 assert(P->getAsType().isCanonical() && "Pack contains non-canonical type"); 2121 } 2122#endif 2123 2124 llvm::FoldingSetNodeID ID; 2125 SubstTemplateTypeParmPackType::Profile(ID, Parm, ArgPack); 2126 void *InsertPos = 0; 2127 if (SubstTemplateTypeParmPackType *SubstParm 2128 = SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos)) 2129 return QualType(SubstParm, 0); 2130 2131 QualType Canon; 2132 if (!Parm->isCanonicalUnqualified()) { 2133 Canon = getCanonicalType(QualType(Parm, 0)); 2134 Canon = getSubstTemplateTypeParmPackType(cast<TemplateTypeParmType>(Canon), 2135 ArgPack); 2136 SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos); 2137 } 2138 2139 SubstTemplateTypeParmPackType *SubstParm 2140 = new (*this, TypeAlignment) SubstTemplateTypeParmPackType(Parm, Canon, 2141 ArgPack); 2142 Types.push_back(SubstParm); 2143 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2144 return QualType(SubstParm, 0); 2145} 2146 2147/// \brief Retrieve the template type parameter type for a template 2148/// parameter or parameter pack with the given depth, index, and (optionally) 2149/// name. 2150QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 2151 bool ParameterPack, 2152 IdentifierInfo *Name) const { 2153 llvm::FoldingSetNodeID ID; 2154 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 2155 void *InsertPos = 0; 2156 TemplateTypeParmType *TypeParm 2157 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2158 2159 if (TypeParm) 2160 return QualType(TypeParm, 0); 2161 2162 if (Name) { 2163 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 2164 TypeParm = new (*this, TypeAlignment) 2165 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 2166 2167 TemplateTypeParmType *TypeCheck 2168 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2169 assert(!TypeCheck && "Template type parameter canonical type broken"); 2170 (void)TypeCheck; 2171 } else 2172 TypeParm = new (*this, TypeAlignment) 2173 TemplateTypeParmType(Depth, Index, ParameterPack); 2174 2175 Types.push_back(TypeParm); 2176 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 2177 2178 return QualType(TypeParm, 0); 2179} 2180 2181TypeSourceInfo * 2182ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 2183 SourceLocation NameLoc, 2184 const TemplateArgumentListInfo &Args, 2185 QualType CanonType) const { 2186 assert(!Name.getAsDependentTemplateName() && 2187 "No dependent template names here!"); 2188 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 2189 2190 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 2191 TemplateSpecializationTypeLoc TL 2192 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 2193 TL.setTemplateNameLoc(NameLoc); 2194 TL.setLAngleLoc(Args.getLAngleLoc()); 2195 TL.setRAngleLoc(Args.getRAngleLoc()); 2196 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 2197 TL.setArgLocInfo(i, Args[i].getLocInfo()); 2198 return DI; 2199} 2200 2201QualType 2202ASTContext::getTemplateSpecializationType(TemplateName Template, 2203 const TemplateArgumentListInfo &Args, 2204 QualType Canon) const { 2205 assert(!Template.getAsDependentTemplateName() && 2206 "No dependent template names here!"); 2207 2208 unsigned NumArgs = Args.size(); 2209 2210 llvm::SmallVector<TemplateArgument, 4> ArgVec; 2211 ArgVec.reserve(NumArgs); 2212 for (unsigned i = 0; i != NumArgs; ++i) 2213 ArgVec.push_back(Args[i].getArgument()); 2214 2215 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 2216 Canon); 2217} 2218 2219QualType 2220ASTContext::getTemplateSpecializationType(TemplateName Template, 2221 const TemplateArgument *Args, 2222 unsigned NumArgs, 2223 QualType Canon) const { 2224 assert(!Template.getAsDependentTemplateName() && 2225 "No dependent template names here!"); 2226 2227 if (!Canon.isNull()) 2228 Canon = getCanonicalType(Canon); 2229 else 2230 Canon = getCanonicalTemplateSpecializationType(Template, Args, NumArgs); 2231 2232 // Allocate the (non-canonical) template specialization type, but don't 2233 // try to unique it: these types typically have location information that 2234 // we don't unique and don't want to lose. 2235 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2236 sizeof(TemplateArgument) * NumArgs), 2237 TypeAlignment); 2238 TemplateSpecializationType *Spec 2239 = new (Mem) TemplateSpecializationType(Template, 2240 Args, NumArgs, 2241 Canon); 2242 2243 Types.push_back(Spec); 2244 return QualType(Spec, 0); 2245} 2246 2247QualType 2248ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template, 2249 const TemplateArgument *Args, 2250 unsigned NumArgs) const { 2251 assert(!Template.getAsDependentTemplateName() && 2252 "No dependent template names here!"); 2253 2254 // Build the canonical template specialization type. 2255 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 2256 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 2257 CanonArgs.reserve(NumArgs); 2258 for (unsigned I = 0; I != NumArgs; ++I) 2259 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 2260 2261 // Determine whether this canonical template specialization type already 2262 // exists. 2263 llvm::FoldingSetNodeID ID; 2264 TemplateSpecializationType::Profile(ID, CanonTemplate, 2265 CanonArgs.data(), NumArgs, *this); 2266 2267 void *InsertPos = 0; 2268 TemplateSpecializationType *Spec 2269 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2270 2271 if (!Spec) { 2272 // Allocate a new canonical template specialization type. 2273 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2274 sizeof(TemplateArgument) * NumArgs), 2275 TypeAlignment); 2276 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 2277 CanonArgs.data(), NumArgs, 2278 QualType()); 2279 Types.push_back(Spec); 2280 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 2281 } 2282 2283 assert(Spec->isDependentType() && 2284 "Non-dependent template-id type must have a canonical type"); 2285 return QualType(Spec, 0); 2286} 2287 2288QualType 2289ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 2290 NestedNameSpecifier *NNS, 2291 QualType NamedType) const { 2292 llvm::FoldingSetNodeID ID; 2293 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 2294 2295 void *InsertPos = 0; 2296 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2297 if (T) 2298 return QualType(T, 0); 2299 2300 QualType Canon = NamedType; 2301 if (!Canon.isCanonical()) { 2302 Canon = getCanonicalType(NamedType); 2303 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2304 assert(!CheckT && "Elaborated canonical type broken"); 2305 (void)CheckT; 2306 } 2307 2308 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 2309 Types.push_back(T); 2310 ElaboratedTypes.InsertNode(T, InsertPos); 2311 return QualType(T, 0); 2312} 2313 2314QualType 2315ASTContext::getParenType(QualType InnerType) const { 2316 llvm::FoldingSetNodeID ID; 2317 ParenType::Profile(ID, InnerType); 2318 2319 void *InsertPos = 0; 2320 ParenType *T = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2321 if (T) 2322 return QualType(T, 0); 2323 2324 QualType Canon = InnerType; 2325 if (!Canon.isCanonical()) { 2326 Canon = getCanonicalType(InnerType); 2327 ParenType *CheckT = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2328 assert(!CheckT && "Paren canonical type broken"); 2329 (void)CheckT; 2330 } 2331 2332 T = new (*this) ParenType(InnerType, Canon); 2333 Types.push_back(T); 2334 ParenTypes.InsertNode(T, InsertPos); 2335 return QualType(T, 0); 2336} 2337 2338QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 2339 NestedNameSpecifier *NNS, 2340 const IdentifierInfo *Name, 2341 QualType Canon) const { 2342 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2343 2344 if (Canon.isNull()) { 2345 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2346 ElaboratedTypeKeyword CanonKeyword = Keyword; 2347 if (Keyword == ETK_None) 2348 CanonKeyword = ETK_Typename; 2349 2350 if (CanonNNS != NNS || CanonKeyword != Keyword) 2351 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 2352 } 2353 2354 llvm::FoldingSetNodeID ID; 2355 DependentNameType::Profile(ID, Keyword, NNS, Name); 2356 2357 void *InsertPos = 0; 2358 DependentNameType *T 2359 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2360 if (T) 2361 return QualType(T, 0); 2362 2363 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 2364 Types.push_back(T); 2365 DependentNameTypes.InsertNode(T, InsertPos); 2366 return QualType(T, 0); 2367} 2368 2369QualType 2370ASTContext::getDependentTemplateSpecializationType( 2371 ElaboratedTypeKeyword Keyword, 2372 NestedNameSpecifier *NNS, 2373 const IdentifierInfo *Name, 2374 const TemplateArgumentListInfo &Args) const { 2375 // TODO: avoid this copy 2376 llvm::SmallVector<TemplateArgument, 16> ArgCopy; 2377 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2378 ArgCopy.push_back(Args[I].getArgument()); 2379 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2380 ArgCopy.size(), 2381 ArgCopy.data()); 2382} 2383 2384QualType 2385ASTContext::getDependentTemplateSpecializationType( 2386 ElaboratedTypeKeyword Keyword, 2387 NestedNameSpecifier *NNS, 2388 const IdentifierInfo *Name, 2389 unsigned NumArgs, 2390 const TemplateArgument *Args) const { 2391 assert((!NNS || NNS->isDependent()) && 2392 "nested-name-specifier must be dependent"); 2393 2394 llvm::FoldingSetNodeID ID; 2395 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2396 Name, NumArgs, Args); 2397 2398 void *InsertPos = 0; 2399 DependentTemplateSpecializationType *T 2400 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2401 if (T) 2402 return QualType(T, 0); 2403 2404 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2405 2406 ElaboratedTypeKeyword CanonKeyword = Keyword; 2407 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2408 2409 bool AnyNonCanonArgs = false; 2410 llvm::SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2411 for (unsigned I = 0; I != NumArgs; ++I) { 2412 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2413 if (!CanonArgs[I].structurallyEquals(Args[I])) 2414 AnyNonCanonArgs = true; 2415 } 2416 2417 QualType Canon; 2418 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2419 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2420 Name, NumArgs, 2421 CanonArgs.data()); 2422 2423 // Find the insert position again. 2424 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2425 } 2426 2427 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2428 sizeof(TemplateArgument) * NumArgs), 2429 TypeAlignment); 2430 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2431 Name, NumArgs, Args, Canon); 2432 Types.push_back(T); 2433 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2434 return QualType(T, 0); 2435} 2436 2437QualType ASTContext::getPackExpansionType(QualType Pattern, 2438 llvm::Optional<unsigned> NumExpansions) { 2439 llvm::FoldingSetNodeID ID; 2440 PackExpansionType::Profile(ID, Pattern, NumExpansions); 2441 2442 assert(Pattern->containsUnexpandedParameterPack() && 2443 "Pack expansions must expand one or more parameter packs"); 2444 void *InsertPos = 0; 2445 PackExpansionType *T 2446 = PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2447 if (T) 2448 return QualType(T, 0); 2449 2450 QualType Canon; 2451 if (!Pattern.isCanonical()) { 2452 Canon = getPackExpansionType(getCanonicalType(Pattern), NumExpansions); 2453 2454 // Find the insert position again. 2455 PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2456 } 2457 2458 T = new (*this) PackExpansionType(Pattern, Canon, NumExpansions); 2459 Types.push_back(T); 2460 PackExpansionTypes.InsertNode(T, InsertPos); 2461 return QualType(T, 0); 2462} 2463 2464/// CmpProtocolNames - Comparison predicate for sorting protocols 2465/// alphabetically. 2466static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2467 const ObjCProtocolDecl *RHS) { 2468 return LHS->getDeclName() < RHS->getDeclName(); 2469} 2470 2471static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2472 unsigned NumProtocols) { 2473 if (NumProtocols == 0) return true; 2474 2475 for (unsigned i = 1; i != NumProtocols; ++i) 2476 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2477 return false; 2478 return true; 2479} 2480 2481static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2482 unsigned &NumProtocols) { 2483 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2484 2485 // Sort protocols, keyed by name. 2486 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2487 2488 // Remove duplicates. 2489 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2490 NumProtocols = ProtocolsEnd-Protocols; 2491} 2492 2493QualType ASTContext::getObjCObjectType(QualType BaseType, 2494 ObjCProtocolDecl * const *Protocols, 2495 unsigned NumProtocols) const { 2496 // If the base type is an interface and there aren't any protocols 2497 // to add, then the interface type will do just fine. 2498 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2499 return BaseType; 2500 2501 // Look in the folding set for an existing type. 2502 llvm::FoldingSetNodeID ID; 2503 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2504 void *InsertPos = 0; 2505 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2506 return QualType(QT, 0); 2507 2508 // Build the canonical type, which has the canonical base type and 2509 // a sorted-and-uniqued list of protocols. 2510 QualType Canonical; 2511 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2512 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2513 if (!ProtocolsSorted) { 2514 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2515 Protocols + NumProtocols); 2516 unsigned UniqueCount = NumProtocols; 2517 2518 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2519 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2520 &Sorted[0], UniqueCount); 2521 } else { 2522 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2523 Protocols, NumProtocols); 2524 } 2525 2526 // Regenerate InsertPos. 2527 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2528 } 2529 2530 unsigned Size = sizeof(ObjCObjectTypeImpl); 2531 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2532 void *Mem = Allocate(Size, TypeAlignment); 2533 ObjCObjectTypeImpl *T = 2534 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2535 2536 Types.push_back(T); 2537 ObjCObjectTypes.InsertNode(T, InsertPos); 2538 return QualType(T, 0); 2539} 2540 2541/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2542/// the given object type. 2543QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) const { 2544 llvm::FoldingSetNodeID ID; 2545 ObjCObjectPointerType::Profile(ID, ObjectT); 2546 2547 void *InsertPos = 0; 2548 if (ObjCObjectPointerType *QT = 2549 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2550 return QualType(QT, 0); 2551 2552 // Find the canonical object type. 2553 QualType Canonical; 2554 if (!ObjectT.isCanonical()) { 2555 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2556 2557 // Regenerate InsertPos. 2558 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2559 } 2560 2561 // No match. 2562 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2563 ObjCObjectPointerType *QType = 2564 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2565 2566 Types.push_back(QType); 2567 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2568 return QualType(QType, 0); 2569} 2570 2571/// getObjCInterfaceType - Return the unique reference to the type for the 2572/// specified ObjC interface decl. The list of protocols is optional. 2573QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) const { 2574 if (Decl->TypeForDecl) 2575 return QualType(Decl->TypeForDecl, 0); 2576 2577 // FIXME: redeclarations? 2578 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2579 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2580 Decl->TypeForDecl = T; 2581 Types.push_back(T); 2582 return QualType(T, 0); 2583} 2584 2585/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2586/// TypeOfExprType AST's (since expression's are never shared). For example, 2587/// multiple declarations that refer to "typeof(x)" all contain different 2588/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2589/// on canonical type's (which are always unique). 2590QualType ASTContext::getTypeOfExprType(Expr *tofExpr) const { 2591 TypeOfExprType *toe; 2592 if (tofExpr->isTypeDependent()) { 2593 llvm::FoldingSetNodeID ID; 2594 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2595 2596 void *InsertPos = 0; 2597 DependentTypeOfExprType *Canon 2598 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2599 if (Canon) { 2600 // We already have a "canonical" version of an identical, dependent 2601 // typeof(expr) type. Use that as our canonical type. 2602 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2603 QualType((TypeOfExprType*)Canon, 0)); 2604 } 2605 else { 2606 // Build a new, canonical typeof(expr) type. 2607 Canon 2608 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2609 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2610 toe = Canon; 2611 } 2612 } else { 2613 QualType Canonical = getCanonicalType(tofExpr->getType()); 2614 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2615 } 2616 Types.push_back(toe); 2617 return QualType(toe, 0); 2618} 2619 2620/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2621/// TypeOfType AST's. The only motivation to unique these nodes would be 2622/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2623/// an issue. This doesn't effect the type checker, since it operates 2624/// on canonical type's (which are always unique). 2625QualType ASTContext::getTypeOfType(QualType tofType) const { 2626 QualType Canonical = getCanonicalType(tofType); 2627 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2628 Types.push_back(tot); 2629 return QualType(tot, 0); 2630} 2631 2632/// getDecltypeForExpr - Given an expr, will return the decltype for that 2633/// expression, according to the rules in C++0x [dcl.type.simple]p4 2634static QualType getDecltypeForExpr(const Expr *e, const ASTContext &Context) { 2635 if (e->isTypeDependent()) 2636 return Context.DependentTy; 2637 2638 // If e is an id expression or a class member access, decltype(e) is defined 2639 // as the type of the entity named by e. 2640 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2641 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2642 return VD->getType(); 2643 } 2644 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2645 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2646 return FD->getType(); 2647 } 2648 // If e is a function call or an invocation of an overloaded operator, 2649 // (parentheses around e are ignored), decltype(e) is defined as the 2650 // return type of that function. 2651 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2652 return CE->getCallReturnType(); 2653 2654 QualType T = e->getType(); 2655 2656 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2657 // defined as T&, otherwise decltype(e) is defined as T. 2658 if (e->isLValue()) 2659 T = Context.getLValueReferenceType(T); 2660 2661 return T; 2662} 2663 2664/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2665/// DecltypeType AST's. The only motivation to unique these nodes would be 2666/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2667/// an issue. This doesn't effect the type checker, since it operates 2668/// on canonical type's (which are always unique). 2669QualType ASTContext::getDecltypeType(Expr *e) const { 2670 DecltypeType *dt; 2671 if (e->isTypeDependent()) { 2672 llvm::FoldingSetNodeID ID; 2673 DependentDecltypeType::Profile(ID, *this, e); 2674 2675 void *InsertPos = 0; 2676 DependentDecltypeType *Canon 2677 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2678 if (Canon) { 2679 // We already have a "canonical" version of an equivalent, dependent 2680 // decltype type. Use that as our canonical type. 2681 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2682 QualType((DecltypeType*)Canon, 0)); 2683 } 2684 else { 2685 // Build a new, canonical typeof(expr) type. 2686 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2687 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2688 dt = Canon; 2689 } 2690 } else { 2691 QualType T = getDecltypeForExpr(e, *this); 2692 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2693 } 2694 Types.push_back(dt); 2695 return QualType(dt, 0); 2696} 2697 2698/// getAutoType - We only unique auto types after they've been deduced. 2699QualType ASTContext::getAutoType(QualType DeducedType) const { 2700 void *InsertPos = 0; 2701 if (!DeducedType.isNull()) { 2702 // Look in the folding set for an existing type. 2703 llvm::FoldingSetNodeID ID; 2704 AutoType::Profile(ID, DeducedType); 2705 if (AutoType *AT = AutoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2706 return QualType(AT, 0); 2707 } 2708 2709 AutoType *AT = new (*this, TypeAlignment) AutoType(DeducedType); 2710 Types.push_back(AT); 2711 if (InsertPos) 2712 AutoTypes.InsertNode(AT, InsertPos); 2713 return QualType(AT, 0); 2714} 2715 2716/// getTagDeclType - Return the unique reference to the type for the 2717/// specified TagDecl (struct/union/class/enum) decl. 2718QualType ASTContext::getTagDeclType(const TagDecl *Decl) const { 2719 assert (Decl); 2720 // FIXME: What is the design on getTagDeclType when it requires casting 2721 // away const? mutable? 2722 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2723} 2724 2725/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2726/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2727/// needs to agree with the definition in <stddef.h>. 2728CanQualType ASTContext::getSizeType() const { 2729 return getFromTargetType(Target.getSizeType()); 2730} 2731 2732/// getSignedWCharType - Return the type of "signed wchar_t". 2733/// Used when in C++, as a GCC extension. 2734QualType ASTContext::getSignedWCharType() const { 2735 // FIXME: derive from "Target" ? 2736 return WCharTy; 2737} 2738 2739/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2740/// Used when in C++, as a GCC extension. 2741QualType ASTContext::getUnsignedWCharType() const { 2742 // FIXME: derive from "Target" ? 2743 return UnsignedIntTy; 2744} 2745 2746/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2747/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2748QualType ASTContext::getPointerDiffType() const { 2749 return getFromTargetType(Target.getPtrDiffType(0)); 2750} 2751 2752//===----------------------------------------------------------------------===// 2753// Type Operators 2754//===----------------------------------------------------------------------===// 2755 2756CanQualType ASTContext::getCanonicalParamType(QualType T) const { 2757 // Push qualifiers into arrays, and then discard any remaining 2758 // qualifiers. 2759 T = getCanonicalType(T); 2760 T = getVariableArrayDecayedType(T); 2761 const Type *Ty = T.getTypePtr(); 2762 QualType Result; 2763 if (isa<ArrayType>(Ty)) { 2764 Result = getArrayDecayedType(QualType(Ty,0)); 2765 } else if (isa<FunctionType>(Ty)) { 2766 Result = getPointerType(QualType(Ty, 0)); 2767 } else { 2768 Result = QualType(Ty, 0); 2769 } 2770 2771 return CanQualType::CreateUnsafe(Result); 2772} 2773 2774 2775QualType ASTContext::getUnqualifiedArrayType(QualType type, 2776 Qualifiers &quals) { 2777 SplitQualType splitType = type.getSplitUnqualifiedType(); 2778 2779 // FIXME: getSplitUnqualifiedType() actually walks all the way to 2780 // the unqualified desugared type and then drops it on the floor. 2781 // We then have to strip that sugar back off with 2782 // getUnqualifiedDesugaredType(), which is silly. 2783 const ArrayType *AT = 2784 dyn_cast<ArrayType>(splitType.first->getUnqualifiedDesugaredType()); 2785 2786 // If we don't have an array, just use the results in splitType. 2787 if (!AT) { 2788 quals = splitType.second; 2789 return QualType(splitType.first, 0); 2790 } 2791 2792 // Otherwise, recurse on the array's element type. 2793 QualType elementType = AT->getElementType(); 2794 QualType unqualElementType = getUnqualifiedArrayType(elementType, quals); 2795 2796 // If that didn't change the element type, AT has no qualifiers, so we 2797 // can just use the results in splitType. 2798 if (elementType == unqualElementType) { 2799 assert(quals.empty()); // from the recursive call 2800 quals = splitType.second; 2801 return QualType(splitType.first, 0); 2802 } 2803 2804 // Otherwise, add in the qualifiers from the outermost type, then 2805 // build the type back up. 2806 quals.addConsistentQualifiers(splitType.second); 2807 2808 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 2809 return getConstantArrayType(unqualElementType, CAT->getSize(), 2810 CAT->getSizeModifier(), 0); 2811 } 2812 2813 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 2814 return getIncompleteArrayType(unqualElementType, IAT->getSizeModifier(), 0); 2815 } 2816 2817 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 2818 return getVariableArrayType(unqualElementType, 2819 VAT->getSizeExpr(), 2820 VAT->getSizeModifier(), 2821 VAT->getIndexTypeCVRQualifiers(), 2822 VAT->getBracketsRange()); 2823 } 2824 2825 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 2826 return getDependentSizedArrayType(unqualElementType, DSAT->getSizeExpr(), 2827 DSAT->getSizeModifier(), 0, 2828 SourceRange()); 2829} 2830 2831/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 2832/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 2833/// they point to and return true. If T1 and T2 aren't pointer types 2834/// or pointer-to-member types, or if they are not similar at this 2835/// level, returns false and leaves T1 and T2 unchanged. Top-level 2836/// qualifiers on T1 and T2 are ignored. This function will typically 2837/// be called in a loop that successively "unwraps" pointer and 2838/// pointer-to-member types to compare them at each level. 2839bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 2840 const PointerType *T1PtrType = T1->getAs<PointerType>(), 2841 *T2PtrType = T2->getAs<PointerType>(); 2842 if (T1PtrType && T2PtrType) { 2843 T1 = T1PtrType->getPointeeType(); 2844 T2 = T2PtrType->getPointeeType(); 2845 return true; 2846 } 2847 2848 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 2849 *T2MPType = T2->getAs<MemberPointerType>(); 2850 if (T1MPType && T2MPType && 2851 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 2852 QualType(T2MPType->getClass(), 0))) { 2853 T1 = T1MPType->getPointeeType(); 2854 T2 = T2MPType->getPointeeType(); 2855 return true; 2856 } 2857 2858 if (getLangOptions().ObjC1) { 2859 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 2860 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 2861 if (T1OPType && T2OPType) { 2862 T1 = T1OPType->getPointeeType(); 2863 T2 = T2OPType->getPointeeType(); 2864 return true; 2865 } 2866 } 2867 2868 // FIXME: Block pointers, too? 2869 2870 return false; 2871} 2872 2873DeclarationNameInfo 2874ASTContext::getNameForTemplate(TemplateName Name, 2875 SourceLocation NameLoc) const { 2876 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2877 // DNInfo work in progress: CHECKME: what about DNLoc? 2878 return DeclarationNameInfo(TD->getDeclName(), NameLoc); 2879 2880 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2881 DeclarationName DName; 2882 if (DTN->isIdentifier()) { 2883 DName = DeclarationNames.getIdentifier(DTN->getIdentifier()); 2884 return DeclarationNameInfo(DName, NameLoc); 2885 } else { 2886 DName = DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2887 // DNInfo work in progress: FIXME: source locations? 2888 DeclarationNameLoc DNLoc; 2889 DNLoc.CXXOperatorName.BeginOpNameLoc = SourceLocation().getRawEncoding(); 2890 DNLoc.CXXOperatorName.EndOpNameLoc = SourceLocation().getRawEncoding(); 2891 return DeclarationNameInfo(DName, NameLoc, DNLoc); 2892 } 2893 } 2894 2895 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2896 assert(Storage); 2897 // DNInfo work in progress: CHECKME: what about DNLoc? 2898 return DeclarationNameInfo((*Storage->begin())->getDeclName(), NameLoc); 2899} 2900 2901TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) const { 2902 if (TemplateDecl *Template = Name.getAsTemplateDecl()) { 2903 if (TemplateTemplateParmDecl *TTP 2904 = dyn_cast<TemplateTemplateParmDecl>(Template)) 2905 Template = getCanonicalTemplateTemplateParmDecl(TTP); 2906 2907 // The canonical template name is the canonical template declaration. 2908 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2909 } 2910 2911 if (SubstTemplateTemplateParmPackStorage *SubstPack 2912 = Name.getAsSubstTemplateTemplateParmPack()) { 2913 TemplateTemplateParmDecl *CanonParam 2914 = getCanonicalTemplateTemplateParmDecl(SubstPack->getParameterPack()); 2915 TemplateArgument CanonArgPack 2916 = getCanonicalTemplateArgument(SubstPack->getArgumentPack()); 2917 return getSubstTemplateTemplateParmPack(CanonParam, CanonArgPack); 2918 } 2919 2920 assert(!Name.getAsOverloadedTemplate()); 2921 2922 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2923 assert(DTN && "Non-dependent template names must refer to template decls."); 2924 return DTN->CanonicalTemplateName; 2925} 2926 2927bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2928 X = getCanonicalTemplateName(X); 2929 Y = getCanonicalTemplateName(Y); 2930 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2931} 2932 2933TemplateArgument 2934ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) const { 2935 switch (Arg.getKind()) { 2936 case TemplateArgument::Null: 2937 return Arg; 2938 2939 case TemplateArgument::Expression: 2940 return Arg; 2941 2942 case TemplateArgument::Declaration: 2943 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2944 2945 case TemplateArgument::Template: 2946 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2947 2948 case TemplateArgument::TemplateExpansion: 2949 return TemplateArgument(getCanonicalTemplateName( 2950 Arg.getAsTemplateOrTemplatePattern()), 2951 Arg.getNumTemplateExpansions()); 2952 2953 case TemplateArgument::Integral: 2954 return TemplateArgument(*Arg.getAsIntegral(), 2955 getCanonicalType(Arg.getIntegralType())); 2956 2957 case TemplateArgument::Type: 2958 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2959 2960 case TemplateArgument::Pack: { 2961 if (Arg.pack_size() == 0) 2962 return Arg; 2963 2964 TemplateArgument *CanonArgs 2965 = new (*this) TemplateArgument[Arg.pack_size()]; 2966 unsigned Idx = 0; 2967 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2968 AEnd = Arg.pack_end(); 2969 A != AEnd; (void)++A, ++Idx) 2970 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2971 2972 return TemplateArgument(CanonArgs, Arg.pack_size()); 2973 } 2974 } 2975 2976 // Silence GCC warning 2977 assert(false && "Unhandled template argument kind"); 2978 return TemplateArgument(); 2979} 2980 2981NestedNameSpecifier * 2982ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const { 2983 if (!NNS) 2984 return 0; 2985 2986 switch (NNS->getKind()) { 2987 case NestedNameSpecifier::Identifier: 2988 // Canonicalize the prefix but keep the identifier the same. 2989 return NestedNameSpecifier::Create(*this, 2990 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2991 NNS->getAsIdentifier()); 2992 2993 case NestedNameSpecifier::Namespace: 2994 // A namespace is canonical; build a nested-name-specifier with 2995 // this namespace and no prefix. 2996 return NestedNameSpecifier::Create(*this, 0, 2997 NNS->getAsNamespace()->getOriginalNamespace()); 2998 2999 case NestedNameSpecifier::NamespaceAlias: 3000 // A namespace is canonical; build a nested-name-specifier with 3001 // this namespace and no prefix. 3002 return NestedNameSpecifier::Create(*this, 0, 3003 NNS->getAsNamespaceAlias()->getNamespace() 3004 ->getOriginalNamespace()); 3005 3006 case NestedNameSpecifier::TypeSpec: 3007 case NestedNameSpecifier::TypeSpecWithTemplate: { 3008 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 3009 3010 // If we have some kind of dependent-named type (e.g., "typename T::type"), 3011 // break it apart into its prefix and identifier, then reconsititute those 3012 // as the canonical nested-name-specifier. This is required to canonicalize 3013 // a dependent nested-name-specifier involving typedefs of dependent-name 3014 // types, e.g., 3015 // typedef typename T::type T1; 3016 // typedef typename T1::type T2; 3017 if (const DependentNameType *DNT = T->getAs<DependentNameType>()) { 3018 NestedNameSpecifier *Prefix 3019 = getCanonicalNestedNameSpecifier(DNT->getQualifier()); 3020 return NestedNameSpecifier::Create(*this, Prefix, 3021 const_cast<IdentifierInfo *>(DNT->getIdentifier())); 3022 } 3023 3024 // Do the same thing as above, but with dependent-named specializations. 3025 if (const DependentTemplateSpecializationType *DTST 3026 = T->getAs<DependentTemplateSpecializationType>()) { 3027 NestedNameSpecifier *Prefix 3028 = getCanonicalNestedNameSpecifier(DTST->getQualifier()); 3029 3030 T = getDependentTemplateSpecializationType(DTST->getKeyword(), 3031 Prefix, DTST->getIdentifier(), 3032 DTST->getNumArgs(), 3033 DTST->getArgs()); 3034 T = getCanonicalType(T); 3035 } 3036 3037 return NestedNameSpecifier::Create(*this, 0, false, 3038 const_cast<Type*>(T.getTypePtr())); 3039 } 3040 3041 case NestedNameSpecifier::Global: 3042 // The global specifier is canonical and unique. 3043 return NNS; 3044 } 3045 3046 // Required to silence a GCC warning 3047 return 0; 3048} 3049 3050 3051const ArrayType *ASTContext::getAsArrayType(QualType T) const { 3052 // Handle the non-qualified case efficiently. 3053 if (!T.hasLocalQualifiers()) { 3054 // Handle the common positive case fast. 3055 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 3056 return AT; 3057 } 3058 3059 // Handle the common negative case fast. 3060 if (!isa<ArrayType>(T.getCanonicalType())) 3061 return 0; 3062 3063 // Apply any qualifiers from the array type to the element type. This 3064 // implements C99 6.7.3p8: "If the specification of an array type includes 3065 // any type qualifiers, the element type is so qualified, not the array type." 3066 3067 // If we get here, we either have type qualifiers on the type, or we have 3068 // sugar such as a typedef in the way. If we have type qualifiers on the type 3069 // we must propagate them down into the element type. 3070 3071 SplitQualType split = T.getSplitDesugaredType(); 3072 Qualifiers qs = split.second; 3073 3074 // If we have a simple case, just return now. 3075 const ArrayType *ATy = dyn_cast<ArrayType>(split.first); 3076 if (ATy == 0 || qs.empty()) 3077 return ATy; 3078 3079 // Otherwise, we have an array and we have qualifiers on it. Push the 3080 // qualifiers into the array element type and return a new array type. 3081 QualType NewEltTy = getQualifiedType(ATy->getElementType(), qs); 3082 3083 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 3084 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 3085 CAT->getSizeModifier(), 3086 CAT->getIndexTypeCVRQualifiers())); 3087 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 3088 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 3089 IAT->getSizeModifier(), 3090 IAT->getIndexTypeCVRQualifiers())); 3091 3092 if (const DependentSizedArrayType *DSAT 3093 = dyn_cast<DependentSizedArrayType>(ATy)) 3094 return cast<ArrayType>( 3095 getDependentSizedArrayType(NewEltTy, 3096 DSAT->getSizeExpr(), 3097 DSAT->getSizeModifier(), 3098 DSAT->getIndexTypeCVRQualifiers(), 3099 DSAT->getBracketsRange())); 3100 3101 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 3102 return cast<ArrayType>(getVariableArrayType(NewEltTy, 3103 VAT->getSizeExpr(), 3104 VAT->getSizeModifier(), 3105 VAT->getIndexTypeCVRQualifiers(), 3106 VAT->getBracketsRange())); 3107} 3108 3109/// getArrayDecayedType - Return the properly qualified result of decaying the 3110/// specified array type to a pointer. This operation is non-trivial when 3111/// handling typedefs etc. The canonical type of "T" must be an array type, 3112/// this returns a pointer to a properly qualified element of the array. 3113/// 3114/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 3115QualType ASTContext::getArrayDecayedType(QualType Ty) const { 3116 // Get the element type with 'getAsArrayType' so that we don't lose any 3117 // typedefs in the element type of the array. This also handles propagation 3118 // of type qualifiers from the array type into the element type if present 3119 // (C99 6.7.3p8). 3120 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 3121 assert(PrettyArrayType && "Not an array type!"); 3122 3123 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 3124 3125 // int x[restrict 4] -> int *restrict 3126 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 3127} 3128 3129QualType ASTContext::getBaseElementType(const ArrayType *array) const { 3130 return getBaseElementType(array->getElementType()); 3131} 3132 3133QualType ASTContext::getBaseElementType(QualType type) const { 3134 Qualifiers qs; 3135 while (true) { 3136 SplitQualType split = type.getSplitDesugaredType(); 3137 const ArrayType *array = split.first->getAsArrayTypeUnsafe(); 3138 if (!array) break; 3139 3140 type = array->getElementType(); 3141 qs.addConsistentQualifiers(split.second); 3142 } 3143 3144 return getQualifiedType(type, qs); 3145} 3146 3147/// getConstantArrayElementCount - Returns number of constant array elements. 3148uint64_t 3149ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 3150 uint64_t ElementCount = 1; 3151 do { 3152 ElementCount *= CA->getSize().getZExtValue(); 3153 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 3154 } while (CA); 3155 return ElementCount; 3156} 3157 3158/// getFloatingRank - Return a relative rank for floating point types. 3159/// This routine will assert if passed a built-in type that isn't a float. 3160static FloatingRank getFloatingRank(QualType T) { 3161 if (const ComplexType *CT = T->getAs<ComplexType>()) 3162 return getFloatingRank(CT->getElementType()); 3163 3164 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 3165 switch (T->getAs<BuiltinType>()->getKind()) { 3166 default: assert(0 && "getFloatingRank(): not a floating type"); 3167 case BuiltinType::Float: return FloatRank; 3168 case BuiltinType::Double: return DoubleRank; 3169 case BuiltinType::LongDouble: return LongDoubleRank; 3170 } 3171} 3172 3173/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 3174/// point or a complex type (based on typeDomain/typeSize). 3175/// 'typeDomain' is a real floating point or complex type. 3176/// 'typeSize' is a real floating point or complex type. 3177QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 3178 QualType Domain) const { 3179 FloatingRank EltRank = getFloatingRank(Size); 3180 if (Domain->isComplexType()) { 3181 switch (EltRank) { 3182 default: assert(0 && "getFloatingRank(): illegal value for rank"); 3183 case FloatRank: return FloatComplexTy; 3184 case DoubleRank: return DoubleComplexTy; 3185 case LongDoubleRank: return LongDoubleComplexTy; 3186 } 3187 } 3188 3189 assert(Domain->isRealFloatingType() && "Unknown domain!"); 3190 switch (EltRank) { 3191 default: assert(0 && "getFloatingRank(): illegal value for rank"); 3192 case FloatRank: return FloatTy; 3193 case DoubleRank: return DoubleTy; 3194 case LongDoubleRank: return LongDoubleTy; 3195 } 3196} 3197 3198/// getFloatingTypeOrder - Compare the rank of the two specified floating 3199/// point types, ignoring the domain of the type (i.e. 'double' == 3200/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 3201/// LHS < RHS, return -1. 3202int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) const { 3203 FloatingRank LHSR = getFloatingRank(LHS); 3204 FloatingRank RHSR = getFloatingRank(RHS); 3205 3206 if (LHSR == RHSR) 3207 return 0; 3208 if (LHSR > RHSR) 3209 return 1; 3210 return -1; 3211} 3212 3213/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 3214/// routine will assert if passed a built-in type that isn't an integer or enum, 3215/// or if it is not canonicalized. 3216unsigned ASTContext::getIntegerRank(const Type *T) const { 3217 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 3218 if (const EnumType* ET = dyn_cast<EnumType>(T)) 3219 T = ET->getDecl()->getPromotionType().getTypePtr(); 3220 3221 if (T->isSpecificBuiltinType(BuiltinType::WChar_S) || 3222 T->isSpecificBuiltinType(BuiltinType::WChar_U)) 3223 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 3224 3225 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 3226 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 3227 3228 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 3229 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 3230 3231 switch (cast<BuiltinType>(T)->getKind()) { 3232 default: assert(0 && "getIntegerRank(): not a built-in integer"); 3233 case BuiltinType::Bool: 3234 return 1 + (getIntWidth(BoolTy) << 3); 3235 case BuiltinType::Char_S: 3236 case BuiltinType::Char_U: 3237 case BuiltinType::SChar: 3238 case BuiltinType::UChar: 3239 return 2 + (getIntWidth(CharTy) << 3); 3240 case BuiltinType::Short: 3241 case BuiltinType::UShort: 3242 return 3 + (getIntWidth(ShortTy) << 3); 3243 case BuiltinType::Int: 3244 case BuiltinType::UInt: 3245 return 4 + (getIntWidth(IntTy) << 3); 3246 case BuiltinType::Long: 3247 case BuiltinType::ULong: 3248 return 5 + (getIntWidth(LongTy) << 3); 3249 case BuiltinType::LongLong: 3250 case BuiltinType::ULongLong: 3251 return 6 + (getIntWidth(LongLongTy) << 3); 3252 case BuiltinType::Int128: 3253 case BuiltinType::UInt128: 3254 return 7 + (getIntWidth(Int128Ty) << 3); 3255 } 3256} 3257 3258/// \brief Whether this is a promotable bitfield reference according 3259/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 3260/// 3261/// \returns the type this bit-field will promote to, or NULL if no 3262/// promotion occurs. 3263QualType ASTContext::isPromotableBitField(Expr *E) const { 3264 if (E->isTypeDependent() || E->isValueDependent()) 3265 return QualType(); 3266 3267 FieldDecl *Field = E->getBitField(); 3268 if (!Field) 3269 return QualType(); 3270 3271 QualType FT = Field->getType(); 3272 3273 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 3274 uint64_t BitWidth = BitWidthAP.getZExtValue(); 3275 uint64_t IntSize = getTypeSize(IntTy); 3276 // GCC extension compatibility: if the bit-field size is less than or equal 3277 // to the size of int, it gets promoted no matter what its type is. 3278 // For instance, unsigned long bf : 4 gets promoted to signed int. 3279 if (BitWidth < IntSize) 3280 return IntTy; 3281 3282 if (BitWidth == IntSize) 3283 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 3284 3285 // Types bigger than int are not subject to promotions, and therefore act 3286 // like the base type. 3287 // FIXME: This doesn't quite match what gcc does, but what gcc does here 3288 // is ridiculous. 3289 return QualType(); 3290} 3291 3292/// getPromotedIntegerType - Returns the type that Promotable will 3293/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 3294/// integer type. 3295QualType ASTContext::getPromotedIntegerType(QualType Promotable) const { 3296 assert(!Promotable.isNull()); 3297 assert(Promotable->isPromotableIntegerType()); 3298 if (const EnumType *ET = Promotable->getAs<EnumType>()) 3299 return ET->getDecl()->getPromotionType(); 3300 if (Promotable->isSignedIntegerType()) 3301 return IntTy; 3302 uint64_t PromotableSize = getTypeSize(Promotable); 3303 uint64_t IntSize = getTypeSize(IntTy); 3304 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 3305 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 3306} 3307 3308/// getIntegerTypeOrder - Returns the highest ranked integer type: 3309/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 3310/// LHS < RHS, return -1. 3311int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) const { 3312 const Type *LHSC = getCanonicalType(LHS).getTypePtr(); 3313 const Type *RHSC = getCanonicalType(RHS).getTypePtr(); 3314 if (LHSC == RHSC) return 0; 3315 3316 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 3317 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 3318 3319 unsigned LHSRank = getIntegerRank(LHSC); 3320 unsigned RHSRank = getIntegerRank(RHSC); 3321 3322 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 3323 if (LHSRank == RHSRank) return 0; 3324 return LHSRank > RHSRank ? 1 : -1; 3325 } 3326 3327 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 3328 if (LHSUnsigned) { 3329 // If the unsigned [LHS] type is larger, return it. 3330 if (LHSRank >= RHSRank) 3331 return 1; 3332 3333 // If the signed type can represent all values of the unsigned type, it 3334 // wins. Because we are dealing with 2's complement and types that are 3335 // powers of two larger than each other, this is always safe. 3336 return -1; 3337 } 3338 3339 // If the unsigned [RHS] type is larger, return it. 3340 if (RHSRank >= LHSRank) 3341 return -1; 3342 3343 // If the signed type can represent all values of the unsigned type, it 3344 // wins. Because we are dealing with 2's complement and types that are 3345 // powers of two larger than each other, this is always safe. 3346 return 1; 3347} 3348 3349static RecordDecl * 3350CreateRecordDecl(const ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 3351 SourceLocation L, IdentifierInfo *Id) { 3352 if (Ctx.getLangOptions().CPlusPlus) 3353 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 3354 else 3355 return RecordDecl::Create(Ctx, TK, DC, L, Id); 3356} 3357 3358// getCFConstantStringType - Return the type used for constant CFStrings. 3359QualType ASTContext::getCFConstantStringType() const { 3360 if (!CFConstantStringTypeDecl) { 3361 CFConstantStringTypeDecl = 3362 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3363 &Idents.get("NSConstantString")); 3364 CFConstantStringTypeDecl->startDefinition(); 3365 3366 QualType FieldTypes[4]; 3367 3368 // const int *isa; 3369 FieldTypes[0] = getPointerType(IntTy.withConst()); 3370 // int flags; 3371 FieldTypes[1] = IntTy; 3372 // const char *str; 3373 FieldTypes[2] = getPointerType(CharTy.withConst()); 3374 // long length; 3375 FieldTypes[3] = LongTy; 3376 3377 // Create fields 3378 for (unsigned i = 0; i < 4; ++i) { 3379 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 3380 SourceLocation(), 0, 3381 FieldTypes[i], /*TInfo=*/0, 3382 /*BitWidth=*/0, 3383 /*Mutable=*/false); 3384 Field->setAccess(AS_public); 3385 CFConstantStringTypeDecl->addDecl(Field); 3386 } 3387 3388 CFConstantStringTypeDecl->completeDefinition(); 3389 } 3390 3391 return getTagDeclType(CFConstantStringTypeDecl); 3392} 3393 3394void ASTContext::setCFConstantStringType(QualType T) { 3395 const RecordType *Rec = T->getAs<RecordType>(); 3396 assert(Rec && "Invalid CFConstantStringType"); 3397 CFConstantStringTypeDecl = Rec->getDecl(); 3398} 3399 3400// getNSConstantStringType - Return the type used for constant NSStrings. 3401QualType ASTContext::getNSConstantStringType() const { 3402 if (!NSConstantStringTypeDecl) { 3403 NSConstantStringTypeDecl = 3404 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3405 &Idents.get("__builtin_NSString")); 3406 NSConstantStringTypeDecl->startDefinition(); 3407 3408 QualType FieldTypes[3]; 3409 3410 // const int *isa; 3411 FieldTypes[0] = getPointerType(IntTy.withConst()); 3412 // const char *str; 3413 FieldTypes[1] = getPointerType(CharTy.withConst()); 3414 // unsigned int length; 3415 FieldTypes[2] = UnsignedIntTy; 3416 3417 // Create fields 3418 for (unsigned i = 0; i < 3; ++i) { 3419 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 3420 SourceLocation(), 0, 3421 FieldTypes[i], /*TInfo=*/0, 3422 /*BitWidth=*/0, 3423 /*Mutable=*/false); 3424 Field->setAccess(AS_public); 3425 NSConstantStringTypeDecl->addDecl(Field); 3426 } 3427 3428 NSConstantStringTypeDecl->completeDefinition(); 3429 } 3430 3431 return getTagDeclType(NSConstantStringTypeDecl); 3432} 3433 3434void ASTContext::setNSConstantStringType(QualType T) { 3435 const RecordType *Rec = T->getAs<RecordType>(); 3436 assert(Rec && "Invalid NSConstantStringType"); 3437 NSConstantStringTypeDecl = Rec->getDecl(); 3438} 3439 3440QualType ASTContext::getObjCFastEnumerationStateType() const { 3441 if (!ObjCFastEnumerationStateTypeDecl) { 3442 ObjCFastEnumerationStateTypeDecl = 3443 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3444 &Idents.get("__objcFastEnumerationState")); 3445 ObjCFastEnumerationStateTypeDecl->startDefinition(); 3446 3447 QualType FieldTypes[] = { 3448 UnsignedLongTy, 3449 getPointerType(ObjCIdTypedefType), 3450 getPointerType(UnsignedLongTy), 3451 getConstantArrayType(UnsignedLongTy, 3452 llvm::APInt(32, 5), ArrayType::Normal, 0) 3453 }; 3454 3455 for (size_t i = 0; i < 4; ++i) { 3456 FieldDecl *Field = FieldDecl::Create(*this, 3457 ObjCFastEnumerationStateTypeDecl, 3458 SourceLocation(), 0, 3459 FieldTypes[i], /*TInfo=*/0, 3460 /*BitWidth=*/0, 3461 /*Mutable=*/false); 3462 Field->setAccess(AS_public); 3463 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 3464 } 3465 3466 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 3467 } 3468 3469 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 3470} 3471 3472QualType ASTContext::getBlockDescriptorType() const { 3473 if (BlockDescriptorType) 3474 return getTagDeclType(BlockDescriptorType); 3475 3476 RecordDecl *T; 3477 // FIXME: Needs the FlagAppleBlock bit. 3478 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3479 &Idents.get("__block_descriptor")); 3480 T->startDefinition(); 3481 3482 QualType FieldTypes[] = { 3483 UnsignedLongTy, 3484 UnsignedLongTy, 3485 }; 3486 3487 const char *FieldNames[] = { 3488 "reserved", 3489 "Size" 3490 }; 3491 3492 for (size_t i = 0; i < 2; ++i) { 3493 FieldDecl *Field = FieldDecl::Create(*this, 3494 T, 3495 SourceLocation(), 3496 &Idents.get(FieldNames[i]), 3497 FieldTypes[i], /*TInfo=*/0, 3498 /*BitWidth=*/0, 3499 /*Mutable=*/false); 3500 Field->setAccess(AS_public); 3501 T->addDecl(Field); 3502 } 3503 3504 T->completeDefinition(); 3505 3506 BlockDescriptorType = T; 3507 3508 return getTagDeclType(BlockDescriptorType); 3509} 3510 3511void ASTContext::setBlockDescriptorType(QualType T) { 3512 const RecordType *Rec = T->getAs<RecordType>(); 3513 assert(Rec && "Invalid BlockDescriptorType"); 3514 BlockDescriptorType = Rec->getDecl(); 3515} 3516 3517QualType ASTContext::getBlockDescriptorExtendedType() const { 3518 if (BlockDescriptorExtendedType) 3519 return getTagDeclType(BlockDescriptorExtendedType); 3520 3521 RecordDecl *T; 3522 // FIXME: Needs the FlagAppleBlock bit. 3523 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3524 &Idents.get("__block_descriptor_withcopydispose")); 3525 T->startDefinition(); 3526 3527 QualType FieldTypes[] = { 3528 UnsignedLongTy, 3529 UnsignedLongTy, 3530 getPointerType(VoidPtrTy), 3531 getPointerType(VoidPtrTy) 3532 }; 3533 3534 const char *FieldNames[] = { 3535 "reserved", 3536 "Size", 3537 "CopyFuncPtr", 3538 "DestroyFuncPtr" 3539 }; 3540 3541 for (size_t i = 0; i < 4; ++i) { 3542 FieldDecl *Field = FieldDecl::Create(*this, 3543 T, 3544 SourceLocation(), 3545 &Idents.get(FieldNames[i]), 3546 FieldTypes[i], /*TInfo=*/0, 3547 /*BitWidth=*/0, 3548 /*Mutable=*/false); 3549 Field->setAccess(AS_public); 3550 T->addDecl(Field); 3551 } 3552 3553 T->completeDefinition(); 3554 3555 BlockDescriptorExtendedType = T; 3556 3557 return getTagDeclType(BlockDescriptorExtendedType); 3558} 3559 3560void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3561 const RecordType *Rec = T->getAs<RecordType>(); 3562 assert(Rec && "Invalid BlockDescriptorType"); 3563 BlockDescriptorExtendedType = Rec->getDecl(); 3564} 3565 3566bool ASTContext::BlockRequiresCopying(QualType Ty) const { 3567 if (Ty->isBlockPointerType()) 3568 return true; 3569 if (isObjCNSObjectType(Ty)) 3570 return true; 3571 if (Ty->isObjCObjectPointerType()) 3572 return true; 3573 if (getLangOptions().CPlusPlus) { 3574 if (const RecordType *RT = Ty->getAs<RecordType>()) { 3575 CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 3576 return RD->hasConstCopyConstructor(*this); 3577 3578 } 3579 } 3580 return false; 3581} 3582 3583QualType 3584ASTContext::BuildByRefType(llvm::StringRef DeclName, QualType Ty) const { 3585 // type = struct __Block_byref_1_X { 3586 // void *__isa; 3587 // struct __Block_byref_1_X *__forwarding; 3588 // unsigned int __flags; 3589 // unsigned int __size; 3590 // void *__copy_helper; // as needed 3591 // void *__destroy_help // as needed 3592 // int X; 3593 // } * 3594 3595 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3596 3597 // FIXME: Move up 3598 llvm::SmallString<36> Name; 3599 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3600 ++UniqueBlockByRefTypeID << '_' << DeclName; 3601 RecordDecl *T; 3602 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3603 &Idents.get(Name.str())); 3604 T->startDefinition(); 3605 QualType Int32Ty = IntTy; 3606 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3607 QualType FieldTypes[] = { 3608 getPointerType(VoidPtrTy), 3609 getPointerType(getTagDeclType(T)), 3610 Int32Ty, 3611 Int32Ty, 3612 getPointerType(VoidPtrTy), 3613 getPointerType(VoidPtrTy), 3614 Ty 3615 }; 3616 3617 llvm::StringRef FieldNames[] = { 3618 "__isa", 3619 "__forwarding", 3620 "__flags", 3621 "__size", 3622 "__copy_helper", 3623 "__destroy_helper", 3624 DeclName, 3625 }; 3626 3627 for (size_t i = 0; i < 7; ++i) { 3628 if (!HasCopyAndDispose && i >=4 && i <= 5) 3629 continue; 3630 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3631 &Idents.get(FieldNames[i]), 3632 FieldTypes[i], /*TInfo=*/0, 3633 /*BitWidth=*/0, /*Mutable=*/false); 3634 Field->setAccess(AS_public); 3635 T->addDecl(Field); 3636 } 3637 3638 T->completeDefinition(); 3639 3640 return getPointerType(getTagDeclType(T)); 3641} 3642 3643void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3644 const RecordType *Rec = T->getAs<RecordType>(); 3645 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3646 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3647} 3648 3649// This returns true if a type has been typedefed to BOOL: 3650// typedef <type> BOOL; 3651static bool isTypeTypedefedAsBOOL(QualType T) { 3652 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3653 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3654 return II->isStr("BOOL"); 3655 3656 return false; 3657} 3658 3659/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3660/// purpose. 3661CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) const { 3662 CharUnits sz = getTypeSizeInChars(type); 3663 3664 // Make all integer and enum types at least as large as an int 3665 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 3666 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3667 // Treat arrays as pointers, since that's how they're passed in. 3668 else if (type->isArrayType()) 3669 sz = getTypeSizeInChars(VoidPtrTy); 3670 return sz; 3671} 3672 3673static inline 3674std::string charUnitsToString(const CharUnits &CU) { 3675 return llvm::itostr(CU.getQuantity()); 3676} 3677 3678/// getObjCEncodingForBlock - Return the encoded type for this block 3679/// declaration. 3680std::string ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr) const { 3681 std::string S; 3682 3683 const BlockDecl *Decl = Expr->getBlockDecl(); 3684 QualType BlockTy = 3685 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3686 // Encode result type. 3687 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3688 // Compute size of all parameters. 3689 // Start with computing size of a pointer in number of bytes. 3690 // FIXME: There might(should) be a better way of doing this computation! 3691 SourceLocation Loc; 3692 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3693 CharUnits ParmOffset = PtrSize; 3694 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3695 E = Decl->param_end(); PI != E; ++PI) { 3696 QualType PType = (*PI)->getType(); 3697 CharUnits sz = getObjCEncodingTypeSize(PType); 3698 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3699 ParmOffset += sz; 3700 } 3701 // Size of the argument frame 3702 S += charUnitsToString(ParmOffset); 3703 // Block pointer and offset. 3704 S += "@?0"; 3705 ParmOffset = PtrSize; 3706 3707 // Argument types. 3708 ParmOffset = PtrSize; 3709 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3710 Decl->param_end(); PI != E; ++PI) { 3711 ParmVarDecl *PVDecl = *PI; 3712 QualType PType = PVDecl->getOriginalType(); 3713 if (const ArrayType *AT = 3714 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3715 // Use array's original type only if it has known number of 3716 // elements. 3717 if (!isa<ConstantArrayType>(AT)) 3718 PType = PVDecl->getType(); 3719 } else if (PType->isFunctionType()) 3720 PType = PVDecl->getType(); 3721 getObjCEncodingForType(PType, S); 3722 S += charUnitsToString(ParmOffset); 3723 ParmOffset += getObjCEncodingTypeSize(PType); 3724 } 3725 3726 return S; 3727} 3728 3729void ASTContext::getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, 3730 std::string& S) { 3731 // Encode result type. 3732 getObjCEncodingForType(Decl->getResultType(), S); 3733 CharUnits ParmOffset; 3734 // Compute size of all parameters. 3735 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 3736 E = Decl->param_end(); PI != E; ++PI) { 3737 QualType PType = (*PI)->getType(); 3738 CharUnits sz = getObjCEncodingTypeSize(PType); 3739 assert (sz.isPositive() && 3740 "getObjCEncodingForMethodDecl - Incomplete param type"); 3741 ParmOffset += sz; 3742 } 3743 S += charUnitsToString(ParmOffset); 3744 ParmOffset = CharUnits::Zero(); 3745 3746 // Argument types. 3747 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 3748 E = Decl->param_end(); PI != E; ++PI) { 3749 ParmVarDecl *PVDecl = *PI; 3750 QualType PType = PVDecl->getOriginalType(); 3751 if (const ArrayType *AT = 3752 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3753 // Use array's original type only if it has known number of 3754 // elements. 3755 if (!isa<ConstantArrayType>(AT)) 3756 PType = PVDecl->getType(); 3757 } else if (PType->isFunctionType()) 3758 PType = PVDecl->getType(); 3759 getObjCEncodingForType(PType, S); 3760 S += charUnitsToString(ParmOffset); 3761 ParmOffset += getObjCEncodingTypeSize(PType); 3762 } 3763} 3764 3765/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3766/// declaration. 3767void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3768 std::string& S) const { 3769 // FIXME: This is not very efficient. 3770 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3771 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3772 // Encode result type. 3773 getObjCEncodingForType(Decl->getResultType(), S); 3774 // Compute size of all parameters. 3775 // Start with computing size of a pointer in number of bytes. 3776 // FIXME: There might(should) be a better way of doing this computation! 3777 SourceLocation Loc; 3778 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3779 // The first two arguments (self and _cmd) are pointers; account for 3780 // their size. 3781 CharUnits ParmOffset = 2 * PtrSize; 3782 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3783 E = Decl->sel_param_end(); PI != E; ++PI) { 3784 QualType PType = (*PI)->getType(); 3785 CharUnits sz = getObjCEncodingTypeSize(PType); 3786 assert (sz.isPositive() && 3787 "getObjCEncodingForMethodDecl - Incomplete param type"); 3788 ParmOffset += sz; 3789 } 3790 S += charUnitsToString(ParmOffset); 3791 S += "@0:"; 3792 S += charUnitsToString(PtrSize); 3793 3794 // Argument types. 3795 ParmOffset = 2 * PtrSize; 3796 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3797 E = Decl->sel_param_end(); PI != E; ++PI) { 3798 ParmVarDecl *PVDecl = *PI; 3799 QualType PType = PVDecl->getOriginalType(); 3800 if (const ArrayType *AT = 3801 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3802 // Use array's original type only if it has known number of 3803 // elements. 3804 if (!isa<ConstantArrayType>(AT)) 3805 PType = PVDecl->getType(); 3806 } else if (PType->isFunctionType()) 3807 PType = PVDecl->getType(); 3808 // Process argument qualifiers for user supplied arguments; such as, 3809 // 'in', 'inout', etc. 3810 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3811 getObjCEncodingForType(PType, S); 3812 S += charUnitsToString(ParmOffset); 3813 ParmOffset += getObjCEncodingTypeSize(PType); 3814 } 3815} 3816 3817/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3818/// property declaration. If non-NULL, Container must be either an 3819/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3820/// NULL when getting encodings for protocol properties. 3821/// Property attributes are stored as a comma-delimited C string. The simple 3822/// attributes readonly and bycopy are encoded as single characters. The 3823/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3824/// encoded as single characters, followed by an identifier. Property types 3825/// are also encoded as a parametrized attribute. The characters used to encode 3826/// these attributes are defined by the following enumeration: 3827/// @code 3828/// enum PropertyAttributes { 3829/// kPropertyReadOnly = 'R', // property is read-only. 3830/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3831/// kPropertyByref = '&', // property is a reference to the value last assigned 3832/// kPropertyDynamic = 'D', // property is dynamic 3833/// kPropertyGetter = 'G', // followed by getter selector name 3834/// kPropertySetter = 'S', // followed by setter selector name 3835/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3836/// kPropertyType = 't' // followed by old-style type encoding. 3837/// kPropertyWeak = 'W' // 'weak' property 3838/// kPropertyStrong = 'P' // property GC'able 3839/// kPropertyNonAtomic = 'N' // property non-atomic 3840/// }; 3841/// @endcode 3842void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3843 const Decl *Container, 3844 std::string& S) const { 3845 // Collect information from the property implementation decl(s). 3846 bool Dynamic = false; 3847 ObjCPropertyImplDecl *SynthesizePID = 0; 3848 3849 // FIXME: Duplicated code due to poor abstraction. 3850 if (Container) { 3851 if (const ObjCCategoryImplDecl *CID = 3852 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3853 for (ObjCCategoryImplDecl::propimpl_iterator 3854 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3855 i != e; ++i) { 3856 ObjCPropertyImplDecl *PID = *i; 3857 if (PID->getPropertyDecl() == PD) { 3858 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3859 Dynamic = true; 3860 } else { 3861 SynthesizePID = PID; 3862 } 3863 } 3864 } 3865 } else { 3866 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3867 for (ObjCCategoryImplDecl::propimpl_iterator 3868 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3869 i != e; ++i) { 3870 ObjCPropertyImplDecl *PID = *i; 3871 if (PID->getPropertyDecl() == PD) { 3872 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3873 Dynamic = true; 3874 } else { 3875 SynthesizePID = PID; 3876 } 3877 } 3878 } 3879 } 3880 } 3881 3882 // FIXME: This is not very efficient. 3883 S = "T"; 3884 3885 // Encode result type. 3886 // GCC has some special rules regarding encoding of properties which 3887 // closely resembles encoding of ivars. 3888 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3889 true /* outermost type */, 3890 true /* encoding for property */); 3891 3892 if (PD->isReadOnly()) { 3893 S += ",R"; 3894 } else { 3895 switch (PD->getSetterKind()) { 3896 case ObjCPropertyDecl::Assign: break; 3897 case ObjCPropertyDecl::Copy: S += ",C"; break; 3898 case ObjCPropertyDecl::Retain: S += ",&"; break; 3899 } 3900 } 3901 3902 // It really isn't clear at all what this means, since properties 3903 // are "dynamic by default". 3904 if (Dynamic) 3905 S += ",D"; 3906 3907 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3908 S += ",N"; 3909 3910 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3911 S += ",G"; 3912 S += PD->getGetterName().getAsString(); 3913 } 3914 3915 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3916 S += ",S"; 3917 S += PD->getSetterName().getAsString(); 3918 } 3919 3920 if (SynthesizePID) { 3921 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3922 S += ",V"; 3923 S += OID->getNameAsString(); 3924 } 3925 3926 // FIXME: OBJCGC: weak & strong 3927} 3928 3929/// getLegacyIntegralTypeEncoding - 3930/// Another legacy compatibility encoding: 32-bit longs are encoded as 3931/// 'l' or 'L' , but not always. For typedefs, we need to use 3932/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3933/// 3934void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3935 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3936 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3937 if (BT->getKind() == BuiltinType::ULong && getIntWidth(PointeeTy) == 32) 3938 PointeeTy = UnsignedIntTy; 3939 else 3940 if (BT->getKind() == BuiltinType::Long && getIntWidth(PointeeTy) == 32) 3941 PointeeTy = IntTy; 3942 } 3943 } 3944} 3945 3946void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3947 const FieldDecl *Field) const { 3948 // We follow the behavior of gcc, expanding structures which are 3949 // directly pointed to, and expanding embedded structures. Note that 3950 // these rules are sufficient to prevent recursive encoding of the 3951 // same type. 3952 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3953 true /* outermost type */); 3954} 3955 3956static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 3957 switch (T->getAs<BuiltinType>()->getKind()) { 3958 default: assert(0 && "Unhandled builtin type kind"); 3959 case BuiltinType::Void: return 'v'; 3960 case BuiltinType::Bool: return 'B'; 3961 case BuiltinType::Char_U: 3962 case BuiltinType::UChar: return 'C'; 3963 case BuiltinType::UShort: return 'S'; 3964 case BuiltinType::UInt: return 'I'; 3965 case BuiltinType::ULong: 3966 return C->getIntWidth(T) == 32 ? 'L' : 'Q'; 3967 case BuiltinType::UInt128: return 'T'; 3968 case BuiltinType::ULongLong: return 'Q'; 3969 case BuiltinType::Char_S: 3970 case BuiltinType::SChar: return 'c'; 3971 case BuiltinType::Short: return 's'; 3972 case BuiltinType::WChar_S: 3973 case BuiltinType::WChar_U: 3974 case BuiltinType::Int: return 'i'; 3975 case BuiltinType::Long: 3976 return C->getIntWidth(T) == 32 ? 'l' : 'q'; 3977 case BuiltinType::LongLong: return 'q'; 3978 case BuiltinType::Int128: return 't'; 3979 case BuiltinType::Float: return 'f'; 3980 case BuiltinType::Double: return 'd'; 3981 case BuiltinType::LongDouble: return 'D'; 3982 } 3983} 3984 3985static void EncodeBitField(const ASTContext *Ctx, std::string& S, 3986 QualType T, const FieldDecl *FD) { 3987 const Expr *E = FD->getBitWidth(); 3988 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3989 S += 'b'; 3990 // The NeXT runtime encodes bit fields as b followed by the number of bits. 3991 // The GNU runtime requires more information; bitfields are encoded as b, 3992 // then the offset (in bits) of the first element, then the type of the 3993 // bitfield, then the size in bits. For example, in this structure: 3994 // 3995 // struct 3996 // { 3997 // int integer; 3998 // int flags:2; 3999 // }; 4000 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 4001 // runtime, but b32i2 for the GNU runtime. The reason for this extra 4002 // information is not especially sensible, but we're stuck with it for 4003 // compatibility with GCC, although providing it breaks anything that 4004 // actually uses runtime introspection and wants to work on both runtimes... 4005 if (!Ctx->getLangOptions().NeXTRuntime) { 4006 const RecordDecl *RD = FD->getParent(); 4007 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 4008 // FIXME: This same linear search is also used in ExprConstant - it might 4009 // be better if the FieldDecl stored its offset. We'd be increasing the 4010 // size of the object slightly, but saving some time every time it is used. 4011 unsigned i = 0; 4012 for (RecordDecl::field_iterator Field = RD->field_begin(), 4013 FieldEnd = RD->field_end(); 4014 Field != FieldEnd; (void)++Field, ++i) { 4015 if (*Field == FD) 4016 break; 4017 } 4018 S += llvm::utostr(RL.getFieldOffset(i)); 4019 if (T->isEnumeralType()) 4020 S += 'i'; 4021 else 4022 S += ObjCEncodingForPrimitiveKind(Ctx, T); 4023 } 4024 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 4025 S += llvm::utostr(N); 4026} 4027 4028// FIXME: Use SmallString for accumulating string. 4029void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 4030 bool ExpandPointedToStructures, 4031 bool ExpandStructures, 4032 const FieldDecl *FD, 4033 bool OutermostType, 4034 bool EncodingProperty) const { 4035 if (T->getAs<BuiltinType>()) { 4036 if (FD && FD->isBitField()) 4037 return EncodeBitField(this, S, T, FD); 4038 S += ObjCEncodingForPrimitiveKind(this, T); 4039 return; 4040 } 4041 4042 if (const ComplexType *CT = T->getAs<ComplexType>()) { 4043 S += 'j'; 4044 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 4045 false); 4046 return; 4047 } 4048 4049 // encoding for pointer or r3eference types. 4050 QualType PointeeTy; 4051 if (const PointerType *PT = T->getAs<PointerType>()) { 4052 if (PT->isObjCSelType()) { 4053 S += ':'; 4054 return; 4055 } 4056 PointeeTy = PT->getPointeeType(); 4057 } 4058 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 4059 PointeeTy = RT->getPointeeType(); 4060 if (!PointeeTy.isNull()) { 4061 bool isReadOnly = false; 4062 // For historical/compatibility reasons, the read-only qualifier of the 4063 // pointee gets emitted _before_ the '^'. The read-only qualifier of 4064 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 4065 // Also, do not emit the 'r' for anything but the outermost type! 4066 if (isa<TypedefType>(T.getTypePtr())) { 4067 if (OutermostType && T.isConstQualified()) { 4068 isReadOnly = true; 4069 S += 'r'; 4070 } 4071 } else if (OutermostType) { 4072 QualType P = PointeeTy; 4073 while (P->getAs<PointerType>()) 4074 P = P->getAs<PointerType>()->getPointeeType(); 4075 if (P.isConstQualified()) { 4076 isReadOnly = true; 4077 S += 'r'; 4078 } 4079 } 4080 if (isReadOnly) { 4081 // Another legacy compatibility encoding. Some ObjC qualifier and type 4082 // combinations need to be rearranged. 4083 // Rewrite "in const" from "nr" to "rn" 4084 if (llvm::StringRef(S).endswith("nr")) 4085 S.replace(S.end()-2, S.end(), "rn"); 4086 } 4087 4088 if (PointeeTy->isCharType()) { 4089 // char pointer types should be encoded as '*' unless it is a 4090 // type that has been typedef'd to 'BOOL'. 4091 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 4092 S += '*'; 4093 return; 4094 } 4095 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 4096 // GCC binary compat: Need to convert "struct objc_class *" to "#". 4097 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 4098 S += '#'; 4099 return; 4100 } 4101 // GCC binary compat: Need to convert "struct objc_object *" to "@". 4102 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 4103 S += '@'; 4104 return; 4105 } 4106 // fall through... 4107 } 4108 S += '^'; 4109 getLegacyIntegralTypeEncoding(PointeeTy); 4110 4111 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 4112 NULL); 4113 return; 4114 } 4115 4116 if (const ArrayType *AT = 4117 // Ignore type qualifiers etc. 4118 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 4119 if (isa<IncompleteArrayType>(AT)) { 4120 // Incomplete arrays are encoded as a pointer to the array element. 4121 S += '^'; 4122 4123 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4124 false, ExpandStructures, FD); 4125 } else { 4126 S += '['; 4127 4128 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 4129 S += llvm::utostr(CAT->getSize().getZExtValue()); 4130 else { 4131 //Variable length arrays are encoded as a regular array with 0 elements. 4132 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 4133 S += '0'; 4134 } 4135 4136 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4137 false, ExpandStructures, FD); 4138 S += ']'; 4139 } 4140 return; 4141 } 4142 4143 if (T->getAs<FunctionType>()) { 4144 S += '?'; 4145 return; 4146 } 4147 4148 if (const RecordType *RTy = T->getAs<RecordType>()) { 4149 RecordDecl *RDecl = RTy->getDecl(); 4150 S += RDecl->isUnion() ? '(' : '{'; 4151 // Anonymous structures print as '?' 4152 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 4153 S += II->getName(); 4154 if (ClassTemplateSpecializationDecl *Spec 4155 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 4156 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 4157 std::string TemplateArgsStr 4158 = TemplateSpecializationType::PrintTemplateArgumentList( 4159 TemplateArgs.data(), 4160 TemplateArgs.size(), 4161 (*this).PrintingPolicy); 4162 4163 S += TemplateArgsStr; 4164 } 4165 } else { 4166 S += '?'; 4167 } 4168 if (ExpandStructures) { 4169 S += '='; 4170 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4171 FieldEnd = RDecl->field_end(); 4172 Field != FieldEnd; ++Field) { 4173 if (FD) { 4174 S += '"'; 4175 S += Field->getNameAsString(); 4176 S += '"'; 4177 } 4178 4179 // Special case bit-fields. 4180 if (Field->isBitField()) { 4181 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 4182 (*Field)); 4183 } else { 4184 QualType qt = Field->getType(); 4185 getLegacyIntegralTypeEncoding(qt); 4186 getObjCEncodingForTypeImpl(qt, S, false, true, 4187 FD); 4188 } 4189 } 4190 } 4191 S += RDecl->isUnion() ? ')' : '}'; 4192 return; 4193 } 4194 4195 if (T->isEnumeralType()) { 4196 if (FD && FD->isBitField()) 4197 EncodeBitField(this, S, T, FD); 4198 else 4199 S += 'i'; 4200 return; 4201 } 4202 4203 if (T->isBlockPointerType()) { 4204 S += "@?"; // Unlike a pointer-to-function, which is "^?". 4205 return; 4206 } 4207 4208 // Ignore protocol qualifiers when mangling at this level. 4209 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 4210 T = OT->getBaseType(); 4211 4212 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 4213 // @encode(class_name) 4214 ObjCInterfaceDecl *OI = OIT->getDecl(); 4215 S += '{'; 4216 const IdentifierInfo *II = OI->getIdentifier(); 4217 S += II->getName(); 4218 S += '='; 4219 llvm::SmallVector<ObjCIvarDecl*, 32> Ivars; 4220 DeepCollectObjCIvars(OI, true, Ivars); 4221 for (unsigned i = 0, e = Ivars.size(); i != e; ++i) { 4222 FieldDecl *Field = cast<FieldDecl>(Ivars[i]); 4223 if (Field->isBitField()) 4224 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, Field); 4225 else 4226 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, FD); 4227 } 4228 S += '}'; 4229 return; 4230 } 4231 4232 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 4233 if (OPT->isObjCIdType()) { 4234 S += '@'; 4235 return; 4236 } 4237 4238 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 4239 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 4240 // Since this is a binary compatibility issue, need to consult with runtime 4241 // folks. Fortunately, this is a *very* obsure construct. 4242 S += '#'; 4243 return; 4244 } 4245 4246 if (OPT->isObjCQualifiedIdType()) { 4247 getObjCEncodingForTypeImpl(getObjCIdType(), S, 4248 ExpandPointedToStructures, 4249 ExpandStructures, FD); 4250 if (FD || EncodingProperty) { 4251 // Note that we do extended encoding of protocol qualifer list 4252 // Only when doing ivar or property encoding. 4253 S += '"'; 4254 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4255 E = OPT->qual_end(); I != E; ++I) { 4256 S += '<'; 4257 S += (*I)->getNameAsString(); 4258 S += '>'; 4259 } 4260 S += '"'; 4261 } 4262 return; 4263 } 4264 4265 QualType PointeeTy = OPT->getPointeeType(); 4266 if (!EncodingProperty && 4267 isa<TypedefType>(PointeeTy.getTypePtr())) { 4268 // Another historical/compatibility reason. 4269 // We encode the underlying type which comes out as 4270 // {...}; 4271 S += '^'; 4272 getObjCEncodingForTypeImpl(PointeeTy, S, 4273 false, ExpandPointedToStructures, 4274 NULL); 4275 return; 4276 } 4277 4278 S += '@'; 4279 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 4280 S += '"'; 4281 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 4282 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4283 E = OPT->qual_end(); I != E; ++I) { 4284 S += '<'; 4285 S += (*I)->getNameAsString(); 4286 S += '>'; 4287 } 4288 S += '"'; 4289 } 4290 return; 4291 } 4292 4293 // gcc just blithely ignores member pointers. 4294 // TODO: maybe there should be a mangling for these 4295 if (T->getAs<MemberPointerType>()) 4296 return; 4297 4298 if (T->isVectorType()) { 4299 // This matches gcc's encoding, even though technically it is 4300 // insufficient. 4301 // FIXME. We should do a better job than gcc. 4302 return; 4303 } 4304 4305 assert(0 && "@encode for type not implemented!"); 4306} 4307 4308void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 4309 std::string& S) const { 4310 if (QT & Decl::OBJC_TQ_In) 4311 S += 'n'; 4312 if (QT & Decl::OBJC_TQ_Inout) 4313 S += 'N'; 4314 if (QT & Decl::OBJC_TQ_Out) 4315 S += 'o'; 4316 if (QT & Decl::OBJC_TQ_Bycopy) 4317 S += 'O'; 4318 if (QT & Decl::OBJC_TQ_Byref) 4319 S += 'R'; 4320 if (QT & Decl::OBJC_TQ_Oneway) 4321 S += 'V'; 4322} 4323 4324void ASTContext::setBuiltinVaListType(QualType T) { 4325 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 4326 4327 BuiltinVaListType = T; 4328} 4329 4330void ASTContext::setObjCIdType(QualType T) { 4331 ObjCIdTypedefType = T; 4332} 4333 4334void ASTContext::setObjCSelType(QualType T) { 4335 ObjCSelTypedefType = T; 4336} 4337 4338void ASTContext::setObjCProtoType(QualType QT) { 4339 ObjCProtoType = QT; 4340} 4341 4342void ASTContext::setObjCClassType(QualType T) { 4343 ObjCClassTypedefType = T; 4344} 4345 4346void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 4347 assert(ObjCConstantStringType.isNull() && 4348 "'NSConstantString' type already set!"); 4349 4350 ObjCConstantStringType = getObjCInterfaceType(Decl); 4351} 4352 4353/// \brief Retrieve the template name that corresponds to a non-empty 4354/// lookup. 4355TemplateName 4356ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 4357 UnresolvedSetIterator End) const { 4358 unsigned size = End - Begin; 4359 assert(size > 1 && "set is not overloaded!"); 4360 4361 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 4362 size * sizeof(FunctionTemplateDecl*)); 4363 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 4364 4365 NamedDecl **Storage = OT->getStorage(); 4366 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 4367 NamedDecl *D = *I; 4368 assert(isa<FunctionTemplateDecl>(D) || 4369 (isa<UsingShadowDecl>(D) && 4370 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 4371 *Storage++ = D; 4372 } 4373 4374 return TemplateName(OT); 4375} 4376 4377/// \brief Retrieve the template name that represents a qualified 4378/// template name such as \c std::vector. 4379TemplateName 4380ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 4381 bool TemplateKeyword, 4382 TemplateDecl *Template) const { 4383 // FIXME: Canonicalization? 4384 llvm::FoldingSetNodeID ID; 4385 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 4386 4387 void *InsertPos = 0; 4388 QualifiedTemplateName *QTN = 4389 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4390 if (!QTN) { 4391 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 4392 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 4393 } 4394 4395 return TemplateName(QTN); 4396} 4397 4398/// \brief Retrieve the template name that represents a dependent 4399/// template name such as \c MetaFun::template apply. 4400TemplateName 4401ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4402 const IdentifierInfo *Name) const { 4403 assert((!NNS || NNS->isDependent()) && 4404 "Nested name specifier must be dependent"); 4405 4406 llvm::FoldingSetNodeID ID; 4407 DependentTemplateName::Profile(ID, NNS, Name); 4408 4409 void *InsertPos = 0; 4410 DependentTemplateName *QTN = 4411 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4412 4413 if (QTN) 4414 return TemplateName(QTN); 4415 4416 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4417 if (CanonNNS == NNS) { 4418 QTN = new (*this,4) DependentTemplateName(NNS, Name); 4419 } else { 4420 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 4421 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 4422 DependentTemplateName *CheckQTN = 4423 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4424 assert(!CheckQTN && "Dependent type name canonicalization broken"); 4425 (void)CheckQTN; 4426 } 4427 4428 DependentTemplateNames.InsertNode(QTN, InsertPos); 4429 return TemplateName(QTN); 4430} 4431 4432/// \brief Retrieve the template name that represents a dependent 4433/// template name such as \c MetaFun::template operator+. 4434TemplateName 4435ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4436 OverloadedOperatorKind Operator) const { 4437 assert((!NNS || NNS->isDependent()) && 4438 "Nested name specifier must be dependent"); 4439 4440 llvm::FoldingSetNodeID ID; 4441 DependentTemplateName::Profile(ID, NNS, Operator); 4442 4443 void *InsertPos = 0; 4444 DependentTemplateName *QTN 4445 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4446 4447 if (QTN) 4448 return TemplateName(QTN); 4449 4450 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4451 if (CanonNNS == NNS) { 4452 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 4453 } else { 4454 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 4455 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 4456 4457 DependentTemplateName *CheckQTN 4458 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4459 assert(!CheckQTN && "Dependent template name canonicalization broken"); 4460 (void)CheckQTN; 4461 } 4462 4463 DependentTemplateNames.InsertNode(QTN, InsertPos); 4464 return TemplateName(QTN); 4465} 4466 4467TemplateName 4468ASTContext::getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 4469 const TemplateArgument &ArgPack) const { 4470 ASTContext &Self = const_cast<ASTContext &>(*this); 4471 llvm::FoldingSetNodeID ID; 4472 SubstTemplateTemplateParmPackStorage::Profile(ID, Self, Param, ArgPack); 4473 4474 void *InsertPos = 0; 4475 SubstTemplateTemplateParmPackStorage *Subst 4476 = SubstTemplateTemplateParmPacks.FindNodeOrInsertPos(ID, InsertPos); 4477 4478 if (!Subst) { 4479 Subst = new (*this) SubstTemplateTemplateParmPackStorage(Self, Param, 4480 ArgPack.pack_size(), 4481 ArgPack.pack_begin()); 4482 SubstTemplateTemplateParmPacks.InsertNode(Subst, InsertPos); 4483 } 4484 4485 return TemplateName(Subst); 4486} 4487 4488/// getFromTargetType - Given one of the integer types provided by 4489/// TargetInfo, produce the corresponding type. The unsigned @p Type 4490/// is actually a value of type @c TargetInfo::IntType. 4491CanQualType ASTContext::getFromTargetType(unsigned Type) const { 4492 switch (Type) { 4493 case TargetInfo::NoInt: return CanQualType(); 4494 case TargetInfo::SignedShort: return ShortTy; 4495 case TargetInfo::UnsignedShort: return UnsignedShortTy; 4496 case TargetInfo::SignedInt: return IntTy; 4497 case TargetInfo::UnsignedInt: return UnsignedIntTy; 4498 case TargetInfo::SignedLong: return LongTy; 4499 case TargetInfo::UnsignedLong: return UnsignedLongTy; 4500 case TargetInfo::SignedLongLong: return LongLongTy; 4501 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 4502 } 4503 4504 assert(false && "Unhandled TargetInfo::IntType value"); 4505 return CanQualType(); 4506} 4507 4508//===----------------------------------------------------------------------===// 4509// Type Predicates. 4510//===----------------------------------------------------------------------===// 4511 4512/// isObjCNSObjectType - Return true if this is an NSObject object using 4513/// NSObject attribute on a c-style pointer type. 4514/// FIXME - Make it work directly on types. 4515/// FIXME: Move to Type. 4516/// 4517bool ASTContext::isObjCNSObjectType(QualType Ty) const { 4518 if (const TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 4519 if (TypedefDecl *TD = TDT->getDecl()) 4520 if (TD->getAttr<ObjCNSObjectAttr>()) 4521 return true; 4522 } 4523 return false; 4524} 4525 4526/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 4527/// garbage collection attribute. 4528/// 4529Qualifiers::GC ASTContext::getObjCGCAttrKind(QualType Ty) const { 4530 if (getLangOptions().getGCMode() == LangOptions::NonGC) 4531 return Qualifiers::GCNone; 4532 4533 assert(getLangOptions().ObjC1); 4534 Qualifiers::GC GCAttrs = Ty.getObjCGCAttr(); 4535 4536 // Default behaviour under objective-C's gc is for ObjC pointers 4537 // (or pointers to them) be treated as though they were declared 4538 // as __strong. 4539 if (GCAttrs == Qualifiers::GCNone) { 4540 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 4541 return Qualifiers::Strong; 4542 else if (Ty->isPointerType()) 4543 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 4544 } else { 4545 // It's not valid to set GC attributes on anything that isn't a 4546 // pointer. 4547#ifndef NDEBUG 4548 QualType CT = Ty->getCanonicalTypeInternal(); 4549 while (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 4550 CT = AT->getElementType(); 4551 assert(CT->isAnyPointerType() || CT->isBlockPointerType()); 4552#endif 4553 } 4554 return GCAttrs; 4555} 4556 4557//===----------------------------------------------------------------------===// 4558// Type Compatibility Testing 4559//===----------------------------------------------------------------------===// 4560 4561/// areCompatVectorTypes - Return true if the two specified vector types are 4562/// compatible. 4563static bool areCompatVectorTypes(const VectorType *LHS, 4564 const VectorType *RHS) { 4565 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 4566 return LHS->getElementType() == RHS->getElementType() && 4567 LHS->getNumElements() == RHS->getNumElements(); 4568} 4569 4570bool ASTContext::areCompatibleVectorTypes(QualType FirstVec, 4571 QualType SecondVec) { 4572 assert(FirstVec->isVectorType() && "FirstVec should be a vector type"); 4573 assert(SecondVec->isVectorType() && "SecondVec should be a vector type"); 4574 4575 if (hasSameUnqualifiedType(FirstVec, SecondVec)) 4576 return true; 4577 4578 // Treat Neon vector types and most AltiVec vector types as if they are the 4579 // equivalent GCC vector types. 4580 const VectorType *First = FirstVec->getAs<VectorType>(); 4581 const VectorType *Second = SecondVec->getAs<VectorType>(); 4582 if (First->getNumElements() == Second->getNumElements() && 4583 hasSameType(First->getElementType(), Second->getElementType()) && 4584 First->getVectorKind() != VectorType::AltiVecPixel && 4585 First->getVectorKind() != VectorType::AltiVecBool && 4586 Second->getVectorKind() != VectorType::AltiVecPixel && 4587 Second->getVectorKind() != VectorType::AltiVecBool) 4588 return true; 4589 4590 return false; 4591} 4592 4593//===----------------------------------------------------------------------===// 4594// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 4595//===----------------------------------------------------------------------===// 4596 4597/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 4598/// inheritance hierarchy of 'rProto'. 4599bool 4600ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 4601 ObjCProtocolDecl *rProto) const { 4602 if (lProto == rProto) 4603 return true; 4604 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 4605 E = rProto->protocol_end(); PI != E; ++PI) 4606 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 4607 return true; 4608 return false; 4609} 4610 4611/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 4612/// return true if lhs's protocols conform to rhs's protocol; false 4613/// otherwise. 4614bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 4615 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 4616 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 4617 return false; 4618} 4619 4620/// ObjCQualifiedClassTypesAreCompatible - compare Class<p,...> and 4621/// Class<p1, ...>. 4622bool ASTContext::ObjCQualifiedClassTypesAreCompatible(QualType lhs, 4623 QualType rhs) { 4624 const ObjCObjectPointerType *lhsQID = lhs->getAs<ObjCObjectPointerType>(); 4625 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4626 assert ((lhsQID && rhsOPT) && "ObjCQualifiedClassTypesAreCompatible"); 4627 4628 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4629 E = lhsQID->qual_end(); I != E; ++I) { 4630 bool match = false; 4631 ObjCProtocolDecl *lhsProto = *I; 4632 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4633 E = rhsOPT->qual_end(); J != E; ++J) { 4634 ObjCProtocolDecl *rhsProto = *J; 4635 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto)) { 4636 match = true; 4637 break; 4638 } 4639 } 4640 if (!match) 4641 return false; 4642 } 4643 return true; 4644} 4645 4646/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 4647/// ObjCQualifiedIDType. 4648bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4649 bool compare) { 4650 // Allow id<P..> and an 'id' or void* type in all cases. 4651 if (lhs->isVoidPointerType() || 4652 lhs->isObjCIdType() || lhs->isObjCClassType()) 4653 return true; 4654 else if (rhs->isVoidPointerType() || 4655 rhs->isObjCIdType() || rhs->isObjCClassType()) 4656 return true; 4657 4658 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4659 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4660 4661 if (!rhsOPT) return false; 4662 4663 if (rhsOPT->qual_empty()) { 4664 // If the RHS is a unqualified interface pointer "NSString*", 4665 // make sure we check the class hierarchy. 4666 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4667 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4668 E = lhsQID->qual_end(); I != E; ++I) { 4669 // when comparing an id<P> on lhs with a static type on rhs, 4670 // see if static class implements all of id's protocols, directly or 4671 // through its super class and categories. 4672 if (!rhsID->ClassImplementsProtocol(*I, true)) 4673 return false; 4674 } 4675 } 4676 // If there are no qualifiers and no interface, we have an 'id'. 4677 return true; 4678 } 4679 // Both the right and left sides have qualifiers. 4680 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4681 E = lhsQID->qual_end(); I != E; ++I) { 4682 ObjCProtocolDecl *lhsProto = *I; 4683 bool match = false; 4684 4685 // when comparing an id<P> on lhs with a static type on rhs, 4686 // see if static class implements all of id's protocols, directly or 4687 // through its super class and categories. 4688 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4689 E = rhsOPT->qual_end(); J != E; ++J) { 4690 ObjCProtocolDecl *rhsProto = *J; 4691 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4692 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4693 match = true; 4694 break; 4695 } 4696 } 4697 // If the RHS is a qualified interface pointer "NSString<P>*", 4698 // make sure we check the class hierarchy. 4699 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4700 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4701 E = lhsQID->qual_end(); I != E; ++I) { 4702 // when comparing an id<P> on lhs with a static type on rhs, 4703 // see if static class implements all of id's protocols, directly or 4704 // through its super class and categories. 4705 if (rhsID->ClassImplementsProtocol(*I, true)) { 4706 match = true; 4707 break; 4708 } 4709 } 4710 } 4711 if (!match) 4712 return false; 4713 } 4714 4715 return true; 4716 } 4717 4718 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4719 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4720 4721 if (const ObjCObjectPointerType *lhsOPT = 4722 lhs->getAsObjCInterfacePointerType()) { 4723 // If both the right and left sides have qualifiers. 4724 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4725 E = lhsOPT->qual_end(); I != E; ++I) { 4726 ObjCProtocolDecl *lhsProto = *I; 4727 bool match = false; 4728 4729 // when comparing an id<P> on rhs with a static type on lhs, 4730 // see if static class implements all of id's protocols, directly or 4731 // through its super class and categories. 4732 // First, lhs protocols in the qualifier list must be found, direct 4733 // or indirect in rhs's qualifier list or it is a mismatch. 4734 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4735 E = rhsQID->qual_end(); J != E; ++J) { 4736 ObjCProtocolDecl *rhsProto = *J; 4737 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4738 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4739 match = true; 4740 break; 4741 } 4742 } 4743 if (!match) 4744 return false; 4745 } 4746 4747 // Static class's protocols, or its super class or category protocols 4748 // must be found, direct or indirect in rhs's qualifier list or it is a mismatch. 4749 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4750 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4751 CollectInheritedProtocols(lhsID, LHSInheritedProtocols); 4752 // This is rather dubious but matches gcc's behavior. If lhs has 4753 // no type qualifier and its class has no static protocol(s) 4754 // assume that it is mismatch. 4755 if (LHSInheritedProtocols.empty() && lhsOPT->qual_empty()) 4756 return false; 4757 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4758 LHSInheritedProtocols.begin(), 4759 E = LHSInheritedProtocols.end(); I != E; ++I) { 4760 bool match = false; 4761 ObjCProtocolDecl *lhsProto = (*I); 4762 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4763 E = rhsQID->qual_end(); J != E; ++J) { 4764 ObjCProtocolDecl *rhsProto = *J; 4765 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4766 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4767 match = true; 4768 break; 4769 } 4770 } 4771 if (!match) 4772 return false; 4773 } 4774 } 4775 return true; 4776 } 4777 return false; 4778} 4779 4780/// canAssignObjCInterfaces - Return true if the two interface types are 4781/// compatible for assignment from RHS to LHS. This handles validation of any 4782/// protocol qualifiers on the LHS or RHS. 4783/// 4784bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4785 const ObjCObjectPointerType *RHSOPT) { 4786 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4787 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4788 4789 // If either type represents the built-in 'id' or 'Class' types, return true. 4790 if (LHS->isObjCUnqualifiedIdOrClass() || 4791 RHS->isObjCUnqualifiedIdOrClass()) 4792 return true; 4793 4794 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 4795 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4796 QualType(RHSOPT,0), 4797 false); 4798 4799 if (LHS->isObjCQualifiedClass() && RHS->isObjCQualifiedClass()) 4800 return ObjCQualifiedClassTypesAreCompatible(QualType(LHSOPT,0), 4801 QualType(RHSOPT,0)); 4802 4803 // If we have 2 user-defined types, fall into that path. 4804 if (LHS->getInterface() && RHS->getInterface()) 4805 return canAssignObjCInterfaces(LHS, RHS); 4806 4807 return false; 4808} 4809 4810/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4811/// for providing type-safty for objective-c pointers used to pass/return 4812/// arguments in block literals. When passed as arguments, passing 'A*' where 4813/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4814/// not OK. For the return type, the opposite is not OK. 4815bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4816 const ObjCObjectPointerType *LHSOPT, 4817 const ObjCObjectPointerType *RHSOPT) { 4818 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4819 return true; 4820 4821 if (LHSOPT->isObjCBuiltinType()) { 4822 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4823 } 4824 4825 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4826 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4827 QualType(RHSOPT,0), 4828 false); 4829 4830 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4831 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4832 if (LHS && RHS) { // We have 2 user-defined types. 4833 if (LHS != RHS) { 4834 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4835 return false; 4836 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4837 return true; 4838 } 4839 else 4840 return true; 4841 } 4842 return false; 4843} 4844 4845/// getIntersectionOfProtocols - This routine finds the intersection of set 4846/// of protocols inherited from two distinct objective-c pointer objects. 4847/// It is used to build composite qualifier list of the composite type of 4848/// the conditional expression involving two objective-c pointer objects. 4849static 4850void getIntersectionOfProtocols(ASTContext &Context, 4851 const ObjCObjectPointerType *LHSOPT, 4852 const ObjCObjectPointerType *RHSOPT, 4853 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4854 4855 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4856 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4857 assert(LHS->getInterface() && "LHS must have an interface base"); 4858 assert(RHS->getInterface() && "RHS must have an interface base"); 4859 4860 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4861 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4862 if (LHSNumProtocols > 0) 4863 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4864 else { 4865 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4866 Context.CollectInheritedProtocols(LHS->getInterface(), 4867 LHSInheritedProtocols); 4868 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4869 LHSInheritedProtocols.end()); 4870 } 4871 4872 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4873 if (RHSNumProtocols > 0) { 4874 ObjCProtocolDecl **RHSProtocols = 4875 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4876 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4877 if (InheritedProtocolSet.count(RHSProtocols[i])) 4878 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4879 } 4880 else { 4881 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4882 Context.CollectInheritedProtocols(RHS->getInterface(), 4883 RHSInheritedProtocols); 4884 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4885 RHSInheritedProtocols.begin(), 4886 E = RHSInheritedProtocols.end(); I != E; ++I) 4887 if (InheritedProtocolSet.count((*I))) 4888 IntersectionOfProtocols.push_back((*I)); 4889 } 4890} 4891 4892/// areCommonBaseCompatible - Returns common base class of the two classes if 4893/// one found. Note that this is O'2 algorithm. But it will be called as the 4894/// last type comparison in a ?-exp of ObjC pointer types before a 4895/// warning is issued. So, its invokation is extremely rare. 4896QualType ASTContext::areCommonBaseCompatible( 4897 const ObjCObjectPointerType *Lptr, 4898 const ObjCObjectPointerType *Rptr) { 4899 const ObjCObjectType *LHS = Lptr->getObjectType(); 4900 const ObjCObjectType *RHS = Rptr->getObjectType(); 4901 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 4902 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 4903 if (!LDecl || !RDecl) 4904 return QualType(); 4905 4906 while ((LDecl = LDecl->getSuperClass())) { 4907 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 4908 if (canAssignObjCInterfaces(LHS, RHS)) { 4909 llvm::SmallVector<ObjCProtocolDecl *, 8> Protocols; 4910 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 4911 4912 QualType Result = QualType(LHS, 0); 4913 if (!Protocols.empty()) 4914 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 4915 Result = getObjCObjectPointerType(Result); 4916 return Result; 4917 } 4918 } 4919 4920 return QualType(); 4921} 4922 4923bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 4924 const ObjCObjectType *RHS) { 4925 assert(LHS->getInterface() && "LHS is not an interface type"); 4926 assert(RHS->getInterface() && "RHS is not an interface type"); 4927 4928 // Verify that the base decls are compatible: the RHS must be a subclass of 4929 // the LHS. 4930 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 4931 return false; 4932 4933 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4934 // protocol qualified at all, then we are good. 4935 if (LHS->getNumProtocols() == 0) 4936 return true; 4937 4938 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4939 // isn't a superset. 4940 if (RHS->getNumProtocols() == 0) 4941 return true; // FIXME: should return false! 4942 4943 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 4944 LHSPE = LHS->qual_end(); 4945 LHSPI != LHSPE; LHSPI++) { 4946 bool RHSImplementsProtocol = false; 4947 4948 // If the RHS doesn't implement the protocol on the left, the types 4949 // are incompatible. 4950 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 4951 RHSPE = RHS->qual_end(); 4952 RHSPI != RHSPE; RHSPI++) { 4953 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4954 RHSImplementsProtocol = true; 4955 break; 4956 } 4957 } 4958 // FIXME: For better diagnostics, consider passing back the protocol name. 4959 if (!RHSImplementsProtocol) 4960 return false; 4961 } 4962 // The RHS implements all protocols listed on the LHS. 4963 return true; 4964} 4965 4966bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4967 // get the "pointed to" types 4968 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4969 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4970 4971 if (!LHSOPT || !RHSOPT) 4972 return false; 4973 4974 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4975 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4976} 4977 4978bool ASTContext::canBindObjCObjectType(QualType To, QualType From) { 4979 return canAssignObjCInterfaces( 4980 getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(), 4981 getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>()); 4982} 4983 4984/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4985/// both shall have the identically qualified version of a compatible type. 4986/// C99 6.2.7p1: Two types have compatible types if their types are the 4987/// same. See 6.7.[2,3,5] for additional rules. 4988bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS, 4989 bool CompareUnqualified) { 4990 if (getLangOptions().CPlusPlus) 4991 return hasSameType(LHS, RHS); 4992 4993 return !mergeTypes(LHS, RHS, false, CompareUnqualified).isNull(); 4994} 4995 4996bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 4997 return !mergeTypes(LHS, RHS, true).isNull(); 4998} 4999 5000/// mergeTransparentUnionType - if T is a transparent union type and a member 5001/// of T is compatible with SubType, return the merged type, else return 5002/// QualType() 5003QualType ASTContext::mergeTransparentUnionType(QualType T, QualType SubType, 5004 bool OfBlockPointer, 5005 bool Unqualified) { 5006 if (const RecordType *UT = T->getAsUnionType()) { 5007 RecordDecl *UD = UT->getDecl(); 5008 if (UD->hasAttr<TransparentUnionAttr>()) { 5009 for (RecordDecl::field_iterator it = UD->field_begin(), 5010 itend = UD->field_end(); it != itend; ++it) { 5011 QualType ET = it->getType().getUnqualifiedType(); 5012 QualType MT = mergeTypes(ET, SubType, OfBlockPointer, Unqualified); 5013 if (!MT.isNull()) 5014 return MT; 5015 } 5016 } 5017 } 5018 5019 return QualType(); 5020} 5021 5022/// mergeFunctionArgumentTypes - merge two types which appear as function 5023/// argument types 5024QualType ASTContext::mergeFunctionArgumentTypes(QualType lhs, QualType rhs, 5025 bool OfBlockPointer, 5026 bool Unqualified) { 5027 // GNU extension: two types are compatible if they appear as a function 5028 // argument, one of the types is a transparent union type and the other 5029 // type is compatible with a union member 5030 QualType lmerge = mergeTransparentUnionType(lhs, rhs, OfBlockPointer, 5031 Unqualified); 5032 if (!lmerge.isNull()) 5033 return lmerge; 5034 5035 QualType rmerge = mergeTransparentUnionType(rhs, lhs, OfBlockPointer, 5036 Unqualified); 5037 if (!rmerge.isNull()) 5038 return rmerge; 5039 5040 return mergeTypes(lhs, rhs, OfBlockPointer, Unqualified); 5041} 5042 5043QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 5044 bool OfBlockPointer, 5045 bool Unqualified) { 5046 const FunctionType *lbase = lhs->getAs<FunctionType>(); 5047 const FunctionType *rbase = rhs->getAs<FunctionType>(); 5048 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 5049 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 5050 bool allLTypes = true; 5051 bool allRTypes = true; 5052 5053 // Check return type 5054 QualType retType; 5055 if (OfBlockPointer) { 5056 QualType RHS = rbase->getResultType(); 5057 QualType LHS = lbase->getResultType(); 5058 bool UnqualifiedResult = Unqualified; 5059 if (!UnqualifiedResult) 5060 UnqualifiedResult = (!RHS.hasQualifiers() && LHS.hasQualifiers()); 5061 retType = mergeTypes(RHS, LHS, true, UnqualifiedResult); 5062 } 5063 else 5064 retType = mergeTypes(lbase->getResultType(), rbase->getResultType(), false, 5065 Unqualified); 5066 if (retType.isNull()) return QualType(); 5067 5068 if (Unqualified) 5069 retType = retType.getUnqualifiedType(); 5070 5071 CanQualType LRetType = getCanonicalType(lbase->getResultType()); 5072 CanQualType RRetType = getCanonicalType(rbase->getResultType()); 5073 if (Unqualified) { 5074 LRetType = LRetType.getUnqualifiedType(); 5075 RRetType = RRetType.getUnqualifiedType(); 5076 } 5077 5078 if (getCanonicalType(retType) != LRetType) 5079 allLTypes = false; 5080 if (getCanonicalType(retType) != RRetType) 5081 allRTypes = false; 5082 5083 // FIXME: double check this 5084 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 5085 // rbase->getRegParmAttr() != 0 && 5086 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 5087 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 5088 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 5089 5090 // Compatible functions must have compatible calling conventions 5091 if (!isSameCallConv(lbaseInfo.getCC(), rbaseInfo.getCC())) 5092 return QualType(); 5093 5094 // Regparm is part of the calling convention. 5095 if (lbaseInfo.getRegParm() != rbaseInfo.getRegParm()) 5096 return QualType(); 5097 5098 // It's noreturn if either type is. 5099 // FIXME: some uses, e.g. conditional exprs, really want this to be 'both'. 5100 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 5101 if (NoReturn != lbaseInfo.getNoReturn()) 5102 allLTypes = false; 5103 if (NoReturn != rbaseInfo.getNoReturn()) 5104 allRTypes = false; 5105 5106 FunctionType::ExtInfo einfo(NoReturn, 5107 lbaseInfo.getRegParm(), 5108 lbaseInfo.getCC()); 5109 5110 if (lproto && rproto) { // two C99 style function prototypes 5111 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 5112 "C++ shouldn't be here"); 5113 unsigned lproto_nargs = lproto->getNumArgs(); 5114 unsigned rproto_nargs = rproto->getNumArgs(); 5115 5116 // Compatible functions must have the same number of arguments 5117 if (lproto_nargs != rproto_nargs) 5118 return QualType(); 5119 5120 // Variadic and non-variadic functions aren't compatible 5121 if (lproto->isVariadic() != rproto->isVariadic()) 5122 return QualType(); 5123 5124 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 5125 return QualType(); 5126 5127 // Check argument compatibility 5128 llvm::SmallVector<QualType, 10> types; 5129 for (unsigned i = 0; i < lproto_nargs; i++) { 5130 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 5131 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 5132 QualType argtype = mergeFunctionArgumentTypes(largtype, rargtype, 5133 OfBlockPointer, 5134 Unqualified); 5135 if (argtype.isNull()) return QualType(); 5136 5137 if (Unqualified) 5138 argtype = argtype.getUnqualifiedType(); 5139 5140 types.push_back(argtype); 5141 if (Unqualified) { 5142 largtype = largtype.getUnqualifiedType(); 5143 rargtype = rargtype.getUnqualifiedType(); 5144 } 5145 5146 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 5147 allLTypes = false; 5148 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 5149 allRTypes = false; 5150 } 5151 if (allLTypes) return lhs; 5152 if (allRTypes) return rhs; 5153 5154 FunctionProtoType::ExtProtoInfo EPI = lproto->getExtProtoInfo(); 5155 EPI.ExtInfo = einfo; 5156 return getFunctionType(retType, types.begin(), types.size(), EPI); 5157 } 5158 5159 if (lproto) allRTypes = false; 5160 if (rproto) allLTypes = false; 5161 5162 const FunctionProtoType *proto = lproto ? lproto : rproto; 5163 if (proto) { 5164 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 5165 if (proto->isVariadic()) return QualType(); 5166 // Check that the types are compatible with the types that 5167 // would result from default argument promotions (C99 6.7.5.3p15). 5168 // The only types actually affected are promotable integer 5169 // types and floats, which would be passed as a different 5170 // type depending on whether the prototype is visible. 5171 unsigned proto_nargs = proto->getNumArgs(); 5172 for (unsigned i = 0; i < proto_nargs; ++i) { 5173 QualType argTy = proto->getArgType(i); 5174 5175 // Look at the promotion type of enum types, since that is the type used 5176 // to pass enum values. 5177 if (const EnumType *Enum = argTy->getAs<EnumType>()) 5178 argTy = Enum->getDecl()->getPromotionType(); 5179 5180 if (argTy->isPromotableIntegerType() || 5181 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 5182 return QualType(); 5183 } 5184 5185 if (allLTypes) return lhs; 5186 if (allRTypes) return rhs; 5187 5188 FunctionProtoType::ExtProtoInfo EPI = proto->getExtProtoInfo(); 5189 EPI.ExtInfo = einfo; 5190 return getFunctionType(retType, proto->arg_type_begin(), 5191 proto->getNumArgs(), EPI); 5192 } 5193 5194 if (allLTypes) return lhs; 5195 if (allRTypes) return rhs; 5196 return getFunctionNoProtoType(retType, einfo); 5197} 5198 5199QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 5200 bool OfBlockPointer, 5201 bool Unqualified) { 5202 // C++ [expr]: If an expression initially has the type "reference to T", the 5203 // type is adjusted to "T" prior to any further analysis, the expression 5204 // designates the object or function denoted by the reference, and the 5205 // expression is an lvalue unless the reference is an rvalue reference and 5206 // the expression is a function call (possibly inside parentheses). 5207 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 5208 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 5209 5210 if (Unqualified) { 5211 LHS = LHS.getUnqualifiedType(); 5212 RHS = RHS.getUnqualifiedType(); 5213 } 5214 5215 QualType LHSCan = getCanonicalType(LHS), 5216 RHSCan = getCanonicalType(RHS); 5217 5218 // If two types are identical, they are compatible. 5219 if (LHSCan == RHSCan) 5220 return LHS; 5221 5222 // If the qualifiers are different, the types aren't compatible... mostly. 5223 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5224 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5225 if (LQuals != RQuals) { 5226 // If any of these qualifiers are different, we have a type 5227 // mismatch. 5228 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5229 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5230 return QualType(); 5231 5232 // Exactly one GC qualifier difference is allowed: __strong is 5233 // okay if the other type has no GC qualifier but is an Objective 5234 // C object pointer (i.e. implicitly strong by default). We fix 5235 // this by pretending that the unqualified type was actually 5236 // qualified __strong. 5237 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5238 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5239 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5240 5241 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5242 return QualType(); 5243 5244 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 5245 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 5246 } 5247 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 5248 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 5249 } 5250 return QualType(); 5251 } 5252 5253 // Okay, qualifiers are equal. 5254 5255 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 5256 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 5257 5258 // We want to consider the two function types to be the same for these 5259 // comparisons, just force one to the other. 5260 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 5261 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 5262 5263 // Same as above for arrays 5264 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 5265 LHSClass = Type::ConstantArray; 5266 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 5267 RHSClass = Type::ConstantArray; 5268 5269 // ObjCInterfaces are just specialized ObjCObjects. 5270 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 5271 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 5272 5273 // Canonicalize ExtVector -> Vector. 5274 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 5275 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 5276 5277 // If the canonical type classes don't match. 5278 if (LHSClass != RHSClass) { 5279 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 5280 // a signed integer type, or an unsigned integer type. 5281 // Compatibility is based on the underlying type, not the promotion 5282 // type. 5283 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 5284 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 5285 return RHS; 5286 } 5287 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 5288 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 5289 return LHS; 5290 } 5291 5292 return QualType(); 5293 } 5294 5295 // The canonical type classes match. 5296 switch (LHSClass) { 5297#define TYPE(Class, Base) 5298#define ABSTRACT_TYPE(Class, Base) 5299#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 5300#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 5301#define DEPENDENT_TYPE(Class, Base) case Type::Class: 5302#include "clang/AST/TypeNodes.def" 5303 assert(false && "Non-canonical and dependent types shouldn't get here"); 5304 return QualType(); 5305 5306 case Type::LValueReference: 5307 case Type::RValueReference: 5308 case Type::MemberPointer: 5309 assert(false && "C++ should never be in mergeTypes"); 5310 return QualType(); 5311 5312 case Type::ObjCInterface: 5313 case Type::IncompleteArray: 5314 case Type::VariableArray: 5315 case Type::FunctionProto: 5316 case Type::ExtVector: 5317 assert(false && "Types are eliminated above"); 5318 return QualType(); 5319 5320 case Type::Pointer: 5321 { 5322 // Merge two pointer types, while trying to preserve typedef info 5323 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 5324 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 5325 if (Unqualified) { 5326 LHSPointee = LHSPointee.getUnqualifiedType(); 5327 RHSPointee = RHSPointee.getUnqualifiedType(); 5328 } 5329 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, false, 5330 Unqualified); 5331 if (ResultType.isNull()) return QualType(); 5332 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5333 return LHS; 5334 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5335 return RHS; 5336 return getPointerType(ResultType); 5337 } 5338 case Type::BlockPointer: 5339 { 5340 // Merge two block pointer types, while trying to preserve typedef info 5341 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 5342 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 5343 if (Unqualified) { 5344 LHSPointee = LHSPointee.getUnqualifiedType(); 5345 RHSPointee = RHSPointee.getUnqualifiedType(); 5346 } 5347 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer, 5348 Unqualified); 5349 if (ResultType.isNull()) return QualType(); 5350 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5351 return LHS; 5352 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5353 return RHS; 5354 return getBlockPointerType(ResultType); 5355 } 5356 case Type::ConstantArray: 5357 { 5358 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 5359 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 5360 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 5361 return QualType(); 5362 5363 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 5364 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 5365 if (Unqualified) { 5366 LHSElem = LHSElem.getUnqualifiedType(); 5367 RHSElem = RHSElem.getUnqualifiedType(); 5368 } 5369 5370 QualType ResultType = mergeTypes(LHSElem, RHSElem, false, Unqualified); 5371 if (ResultType.isNull()) return QualType(); 5372 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5373 return LHS; 5374 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5375 return RHS; 5376 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 5377 ArrayType::ArraySizeModifier(), 0); 5378 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 5379 ArrayType::ArraySizeModifier(), 0); 5380 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 5381 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 5382 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5383 return LHS; 5384 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5385 return RHS; 5386 if (LVAT) { 5387 // FIXME: This isn't correct! But tricky to implement because 5388 // the array's size has to be the size of LHS, but the type 5389 // has to be different. 5390 return LHS; 5391 } 5392 if (RVAT) { 5393 // FIXME: This isn't correct! But tricky to implement because 5394 // the array's size has to be the size of RHS, but the type 5395 // has to be different. 5396 return RHS; 5397 } 5398 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 5399 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 5400 return getIncompleteArrayType(ResultType, 5401 ArrayType::ArraySizeModifier(), 0); 5402 } 5403 case Type::FunctionNoProto: 5404 return mergeFunctionTypes(LHS, RHS, OfBlockPointer, Unqualified); 5405 case Type::Record: 5406 case Type::Enum: 5407 return QualType(); 5408 case Type::Builtin: 5409 // Only exactly equal builtin types are compatible, which is tested above. 5410 return QualType(); 5411 case Type::Complex: 5412 // Distinct complex types are incompatible. 5413 return QualType(); 5414 case Type::Vector: 5415 // FIXME: The merged type should be an ExtVector! 5416 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 5417 RHSCan->getAs<VectorType>())) 5418 return LHS; 5419 return QualType(); 5420 case Type::ObjCObject: { 5421 // Check if the types are assignment compatible. 5422 // FIXME: This should be type compatibility, e.g. whether 5423 // "LHS x; RHS x;" at global scope is legal. 5424 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 5425 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 5426 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 5427 return LHS; 5428 5429 return QualType(); 5430 } 5431 case Type::ObjCObjectPointer: { 5432 if (OfBlockPointer) { 5433 if (canAssignObjCInterfacesInBlockPointer( 5434 LHS->getAs<ObjCObjectPointerType>(), 5435 RHS->getAs<ObjCObjectPointerType>())) 5436 return LHS; 5437 return QualType(); 5438 } 5439 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 5440 RHS->getAs<ObjCObjectPointerType>())) 5441 return LHS; 5442 5443 return QualType(); 5444 } 5445 } 5446 5447 return QualType(); 5448} 5449 5450/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 5451/// 'RHS' attributes and returns the merged version; including for function 5452/// return types. 5453QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 5454 QualType LHSCan = getCanonicalType(LHS), 5455 RHSCan = getCanonicalType(RHS); 5456 // If two types are identical, they are compatible. 5457 if (LHSCan == RHSCan) 5458 return LHS; 5459 if (RHSCan->isFunctionType()) { 5460 if (!LHSCan->isFunctionType()) 5461 return QualType(); 5462 QualType OldReturnType = 5463 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 5464 QualType NewReturnType = 5465 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 5466 QualType ResReturnType = 5467 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 5468 if (ResReturnType.isNull()) 5469 return QualType(); 5470 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 5471 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 5472 // In either case, use OldReturnType to build the new function type. 5473 const FunctionType *F = LHS->getAs<FunctionType>(); 5474 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 5475 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 5476 EPI.ExtInfo = getFunctionExtInfo(LHS); 5477 QualType ResultType 5478 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 5479 FPT->getNumArgs(), EPI); 5480 return ResultType; 5481 } 5482 } 5483 return QualType(); 5484 } 5485 5486 // If the qualifiers are different, the types can still be merged. 5487 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5488 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5489 if (LQuals != RQuals) { 5490 // If any of these qualifiers are different, we have a type mismatch. 5491 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5492 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5493 return QualType(); 5494 5495 // Exactly one GC qualifier difference is allowed: __strong is 5496 // okay if the other type has no GC qualifier but is an Objective 5497 // C object pointer (i.e. implicitly strong by default). We fix 5498 // this by pretending that the unqualified type was actually 5499 // qualified __strong. 5500 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5501 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5502 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5503 5504 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5505 return QualType(); 5506 5507 if (GC_L == Qualifiers::Strong) 5508 return LHS; 5509 if (GC_R == Qualifiers::Strong) 5510 return RHS; 5511 return QualType(); 5512 } 5513 5514 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 5515 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5516 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5517 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 5518 if (ResQT == LHSBaseQT) 5519 return LHS; 5520 if (ResQT == RHSBaseQT) 5521 return RHS; 5522 } 5523 return QualType(); 5524} 5525 5526//===----------------------------------------------------------------------===// 5527// Integer Predicates 5528//===----------------------------------------------------------------------===// 5529 5530unsigned ASTContext::getIntWidth(QualType T) const { 5531 if (const EnumType *ET = dyn_cast<EnumType>(T)) 5532 T = ET->getDecl()->getIntegerType(); 5533 if (T->isBooleanType()) 5534 return 1; 5535 // For builtin types, just use the standard type sizing method 5536 return (unsigned)getTypeSize(T); 5537} 5538 5539QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 5540 assert(T->hasSignedIntegerRepresentation() && "Unexpected type"); 5541 5542 // Turn <4 x signed int> -> <4 x unsigned int> 5543 if (const VectorType *VTy = T->getAs<VectorType>()) 5544 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 5545 VTy->getNumElements(), VTy->getVectorKind()); 5546 5547 // For enums, we return the unsigned version of the base type. 5548 if (const EnumType *ETy = T->getAs<EnumType>()) 5549 T = ETy->getDecl()->getIntegerType(); 5550 5551 const BuiltinType *BTy = T->getAs<BuiltinType>(); 5552 assert(BTy && "Unexpected signed integer type"); 5553 switch (BTy->getKind()) { 5554 case BuiltinType::Char_S: 5555 case BuiltinType::SChar: 5556 return UnsignedCharTy; 5557 case BuiltinType::Short: 5558 return UnsignedShortTy; 5559 case BuiltinType::Int: 5560 return UnsignedIntTy; 5561 case BuiltinType::Long: 5562 return UnsignedLongTy; 5563 case BuiltinType::LongLong: 5564 return UnsignedLongLongTy; 5565 case BuiltinType::Int128: 5566 return UnsignedInt128Ty; 5567 default: 5568 assert(0 && "Unexpected signed integer type"); 5569 return QualType(); 5570 } 5571} 5572 5573ASTMutationListener::~ASTMutationListener() { } 5574 5575 5576//===----------------------------------------------------------------------===// 5577// Builtin Type Computation 5578//===----------------------------------------------------------------------===// 5579 5580/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 5581/// pointer over the consumed characters. This returns the resultant type. If 5582/// AllowTypeModifiers is false then modifier like * are not parsed, just basic 5583/// types. This allows "v2i*" to be parsed as a pointer to a v2i instead of 5584/// a vector of "i*". 5585/// 5586/// RequiresICE is filled in on return to indicate whether the value is required 5587/// to be an Integer Constant Expression. 5588static QualType DecodeTypeFromStr(const char *&Str, const ASTContext &Context, 5589 ASTContext::GetBuiltinTypeError &Error, 5590 bool &RequiresICE, 5591 bool AllowTypeModifiers) { 5592 // Modifiers. 5593 int HowLong = 0; 5594 bool Signed = false, Unsigned = false; 5595 RequiresICE = false; 5596 5597 // Read the prefixed modifiers first. 5598 bool Done = false; 5599 while (!Done) { 5600 switch (*Str++) { 5601 default: Done = true; --Str; break; 5602 case 'I': 5603 RequiresICE = true; 5604 break; 5605 case 'S': 5606 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 5607 assert(!Signed && "Can't use 'S' modifier multiple times!"); 5608 Signed = true; 5609 break; 5610 case 'U': 5611 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 5612 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 5613 Unsigned = true; 5614 break; 5615 case 'L': 5616 assert(HowLong <= 2 && "Can't have LLLL modifier"); 5617 ++HowLong; 5618 break; 5619 } 5620 } 5621 5622 QualType Type; 5623 5624 // Read the base type. 5625 switch (*Str++) { 5626 default: assert(0 && "Unknown builtin type letter!"); 5627 case 'v': 5628 assert(HowLong == 0 && !Signed && !Unsigned && 5629 "Bad modifiers used with 'v'!"); 5630 Type = Context.VoidTy; 5631 break; 5632 case 'f': 5633 assert(HowLong == 0 && !Signed && !Unsigned && 5634 "Bad modifiers used with 'f'!"); 5635 Type = Context.FloatTy; 5636 break; 5637 case 'd': 5638 assert(HowLong < 2 && !Signed && !Unsigned && 5639 "Bad modifiers used with 'd'!"); 5640 if (HowLong) 5641 Type = Context.LongDoubleTy; 5642 else 5643 Type = Context.DoubleTy; 5644 break; 5645 case 's': 5646 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 5647 if (Unsigned) 5648 Type = Context.UnsignedShortTy; 5649 else 5650 Type = Context.ShortTy; 5651 break; 5652 case 'i': 5653 if (HowLong == 3) 5654 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 5655 else if (HowLong == 2) 5656 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 5657 else if (HowLong == 1) 5658 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 5659 else 5660 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 5661 break; 5662 case 'c': 5663 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 5664 if (Signed) 5665 Type = Context.SignedCharTy; 5666 else if (Unsigned) 5667 Type = Context.UnsignedCharTy; 5668 else 5669 Type = Context.CharTy; 5670 break; 5671 case 'b': // boolean 5672 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 5673 Type = Context.BoolTy; 5674 break; 5675 case 'z': // size_t. 5676 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 5677 Type = Context.getSizeType(); 5678 break; 5679 case 'F': 5680 Type = Context.getCFConstantStringType(); 5681 break; 5682 case 'G': 5683 Type = Context.getObjCIdType(); 5684 break; 5685 case 'H': 5686 Type = Context.getObjCSelType(); 5687 break; 5688 case 'a': 5689 Type = Context.getBuiltinVaListType(); 5690 assert(!Type.isNull() && "builtin va list type not initialized!"); 5691 break; 5692 case 'A': 5693 // This is a "reference" to a va_list; however, what exactly 5694 // this means depends on how va_list is defined. There are two 5695 // different kinds of va_list: ones passed by value, and ones 5696 // passed by reference. An example of a by-value va_list is 5697 // x86, where va_list is a char*. An example of by-ref va_list 5698 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 5699 // we want this argument to be a char*&; for x86-64, we want 5700 // it to be a __va_list_tag*. 5701 Type = Context.getBuiltinVaListType(); 5702 assert(!Type.isNull() && "builtin va list type not initialized!"); 5703 if (Type->isArrayType()) 5704 Type = Context.getArrayDecayedType(Type); 5705 else 5706 Type = Context.getLValueReferenceType(Type); 5707 break; 5708 case 'V': { 5709 char *End; 5710 unsigned NumElements = strtoul(Str, &End, 10); 5711 assert(End != Str && "Missing vector size"); 5712 Str = End; 5713 5714 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, 5715 RequiresICE, false); 5716 assert(!RequiresICE && "Can't require vector ICE"); 5717 5718 // TODO: No way to make AltiVec vectors in builtins yet. 5719 Type = Context.getVectorType(ElementType, NumElements, 5720 VectorType::GenericVector); 5721 break; 5722 } 5723 case 'X': { 5724 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, RequiresICE, 5725 false); 5726 assert(!RequiresICE && "Can't require complex ICE"); 5727 Type = Context.getComplexType(ElementType); 5728 break; 5729 } 5730 case 'P': 5731 Type = Context.getFILEType(); 5732 if (Type.isNull()) { 5733 Error = ASTContext::GE_Missing_stdio; 5734 return QualType(); 5735 } 5736 break; 5737 case 'J': 5738 if (Signed) 5739 Type = Context.getsigjmp_bufType(); 5740 else 5741 Type = Context.getjmp_bufType(); 5742 5743 if (Type.isNull()) { 5744 Error = ASTContext::GE_Missing_setjmp; 5745 return QualType(); 5746 } 5747 break; 5748 } 5749 5750 // If there are modifiers and if we're allowed to parse them, go for it. 5751 Done = !AllowTypeModifiers; 5752 while (!Done) { 5753 switch (char c = *Str++) { 5754 default: Done = true; --Str; break; 5755 case '*': 5756 case '&': { 5757 // Both pointers and references can have their pointee types 5758 // qualified with an address space. 5759 char *End; 5760 unsigned AddrSpace = strtoul(Str, &End, 10); 5761 if (End != Str && AddrSpace != 0) { 5762 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 5763 Str = End; 5764 } 5765 if (c == '*') 5766 Type = Context.getPointerType(Type); 5767 else 5768 Type = Context.getLValueReferenceType(Type); 5769 break; 5770 } 5771 // FIXME: There's no way to have a built-in with an rvalue ref arg. 5772 case 'C': 5773 Type = Type.withConst(); 5774 break; 5775 case 'D': 5776 Type = Context.getVolatileType(Type); 5777 break; 5778 } 5779 } 5780 5781 assert((!RequiresICE || Type->isIntegralOrEnumerationType()) && 5782 "Integer constant 'I' type must be an integer"); 5783 5784 return Type; 5785} 5786 5787/// GetBuiltinType - Return the type for the specified builtin. 5788QualType ASTContext::GetBuiltinType(unsigned Id, 5789 GetBuiltinTypeError &Error, 5790 unsigned *IntegerConstantArgs) const { 5791 const char *TypeStr = BuiltinInfo.GetTypeString(Id); 5792 5793 llvm::SmallVector<QualType, 8> ArgTypes; 5794 5795 bool RequiresICE = false; 5796 Error = GE_None; 5797 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error, 5798 RequiresICE, true); 5799 if (Error != GE_None) 5800 return QualType(); 5801 5802 assert(!RequiresICE && "Result of intrinsic cannot be required to be an ICE"); 5803 5804 while (TypeStr[0] && TypeStr[0] != '.') { 5805 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error, RequiresICE, true); 5806 if (Error != GE_None) 5807 return QualType(); 5808 5809 // If this argument is required to be an IntegerConstantExpression and the 5810 // caller cares, fill in the bitmask we return. 5811 if (RequiresICE && IntegerConstantArgs) 5812 *IntegerConstantArgs |= 1 << ArgTypes.size(); 5813 5814 // Do array -> pointer decay. The builtin should use the decayed type. 5815 if (Ty->isArrayType()) 5816 Ty = getArrayDecayedType(Ty); 5817 5818 ArgTypes.push_back(Ty); 5819 } 5820 5821 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 5822 "'.' should only occur at end of builtin type list!"); 5823 5824 FunctionType::ExtInfo EI; 5825 if (BuiltinInfo.isNoReturn(Id)) EI = EI.withNoReturn(true); 5826 5827 bool Variadic = (TypeStr[0] == '.'); 5828 5829 // We really shouldn't be making a no-proto type here, especially in C++. 5830 if (ArgTypes.empty() && Variadic) 5831 return getFunctionNoProtoType(ResType, EI); 5832 5833 FunctionProtoType::ExtProtoInfo EPI; 5834 EPI.ExtInfo = EI; 5835 EPI.Variadic = Variadic; 5836 5837 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), EPI); 5838} 5839 5840GVALinkage ASTContext::GetGVALinkageForFunction(const FunctionDecl *FD) { 5841 GVALinkage External = GVA_StrongExternal; 5842 5843 Linkage L = FD->getLinkage(); 5844 switch (L) { 5845 case NoLinkage: 5846 case InternalLinkage: 5847 case UniqueExternalLinkage: 5848 return GVA_Internal; 5849 5850 case ExternalLinkage: 5851 switch (FD->getTemplateSpecializationKind()) { 5852 case TSK_Undeclared: 5853 case TSK_ExplicitSpecialization: 5854 External = GVA_StrongExternal; 5855 break; 5856 5857 case TSK_ExplicitInstantiationDefinition: 5858 return GVA_ExplicitTemplateInstantiation; 5859 5860 case TSK_ExplicitInstantiationDeclaration: 5861 case TSK_ImplicitInstantiation: 5862 External = GVA_TemplateInstantiation; 5863 break; 5864 } 5865 } 5866 5867 if (!FD->isInlined()) 5868 return External; 5869 5870 if (!getLangOptions().CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 5871 // GNU or C99 inline semantics. Determine whether this symbol should be 5872 // externally visible. 5873 if (FD->isInlineDefinitionExternallyVisible()) 5874 return External; 5875 5876 // C99 inline semantics, where the symbol is not externally visible. 5877 return GVA_C99Inline; 5878 } 5879 5880 // C++0x [temp.explicit]p9: 5881 // [ Note: The intent is that an inline function that is the subject of 5882 // an explicit instantiation declaration will still be implicitly 5883 // instantiated when used so that the body can be considered for 5884 // inlining, but that no out-of-line copy of the inline function would be 5885 // generated in the translation unit. -- end note ] 5886 if (FD->getTemplateSpecializationKind() 5887 == TSK_ExplicitInstantiationDeclaration) 5888 return GVA_C99Inline; 5889 5890 return GVA_CXXInline; 5891} 5892 5893GVALinkage ASTContext::GetGVALinkageForVariable(const VarDecl *VD) { 5894 // If this is a static data member, compute the kind of template 5895 // specialization. Otherwise, this variable is not part of a 5896 // template. 5897 TemplateSpecializationKind TSK = TSK_Undeclared; 5898 if (VD->isStaticDataMember()) 5899 TSK = VD->getTemplateSpecializationKind(); 5900 5901 Linkage L = VD->getLinkage(); 5902 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 5903 VD->getType()->getLinkage() == UniqueExternalLinkage) 5904 L = UniqueExternalLinkage; 5905 5906 switch (L) { 5907 case NoLinkage: 5908 case InternalLinkage: 5909 case UniqueExternalLinkage: 5910 return GVA_Internal; 5911 5912 case ExternalLinkage: 5913 switch (TSK) { 5914 case TSK_Undeclared: 5915 case TSK_ExplicitSpecialization: 5916 return GVA_StrongExternal; 5917 5918 case TSK_ExplicitInstantiationDeclaration: 5919 llvm_unreachable("Variable should not be instantiated"); 5920 // Fall through to treat this like any other instantiation. 5921 5922 case TSK_ExplicitInstantiationDefinition: 5923 return GVA_ExplicitTemplateInstantiation; 5924 5925 case TSK_ImplicitInstantiation: 5926 return GVA_TemplateInstantiation; 5927 } 5928 } 5929 5930 return GVA_StrongExternal; 5931} 5932 5933bool ASTContext::DeclMustBeEmitted(const Decl *D) { 5934 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 5935 if (!VD->isFileVarDecl()) 5936 return false; 5937 } else if (!isa<FunctionDecl>(D)) 5938 return false; 5939 5940 // Weak references don't produce any output by themselves. 5941 if (D->hasAttr<WeakRefAttr>()) 5942 return false; 5943 5944 // Aliases and used decls are required. 5945 if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>()) 5946 return true; 5947 5948 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 5949 // Forward declarations aren't required. 5950 if (!FD->isThisDeclarationADefinition()) 5951 return false; 5952 5953 // Constructors and destructors are required. 5954 if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>()) 5955 return true; 5956 5957 // The key function for a class is required. 5958 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 5959 const CXXRecordDecl *RD = MD->getParent(); 5960 if (MD->isOutOfLine() && RD->isDynamicClass()) { 5961 const CXXMethodDecl *KeyFunc = getKeyFunction(RD); 5962 if (KeyFunc && KeyFunc->getCanonicalDecl() == MD->getCanonicalDecl()) 5963 return true; 5964 } 5965 } 5966 5967 GVALinkage Linkage = GetGVALinkageForFunction(FD); 5968 5969 // static, static inline, always_inline, and extern inline functions can 5970 // always be deferred. Normal inline functions can be deferred in C99/C++. 5971 // Implicit template instantiations can also be deferred in C++. 5972 if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 5973 Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 5974 return false; 5975 return true; 5976 } 5977 5978 const VarDecl *VD = cast<VarDecl>(D); 5979 assert(VD->isFileVarDecl() && "Expected file scoped var"); 5980 5981 if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) 5982 return false; 5983 5984 // Structs that have non-trivial constructors or destructors are required. 5985 5986 // FIXME: Handle references. 5987 if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { 5988 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 5989 if (RD->hasDefinition() && 5990 (!RD->hasTrivialConstructor() || !RD->hasTrivialDestructor())) 5991 return true; 5992 } 5993 } 5994 5995 GVALinkage L = GetGVALinkageForVariable(VD); 5996 if (L == GVA_Internal || L == GVA_TemplateInstantiation) { 5997 if (!(VD->getInit() && VD->getInit()->HasSideEffects(*this))) 5998 return false; 5999 } 6000 6001 return true; 6002} 6003 6004CallingConv ASTContext::getDefaultMethodCallConv() { 6005 // Pass through to the C++ ABI object 6006 return ABI->getDefaultMethodCallConv(); 6007} 6008 6009bool ASTContext::isNearlyEmpty(const CXXRecordDecl *RD) const { 6010 // Pass through to the C++ ABI object 6011 return ABI->isNearlyEmpty(RD); 6012} 6013 6014MangleContext *ASTContext::createMangleContext() { 6015 switch (Target.getCXXABI()) { 6016 case CXXABI_ARM: 6017 case CXXABI_Itanium: 6018 return createItaniumMangleContext(*this, getDiagnostics()); 6019 case CXXABI_Microsoft: 6020 return createMicrosoftMangleContext(*this, getDiagnostics()); 6021 } 6022 assert(0 && "Unsupported ABI"); 6023 return 0; 6024} 6025 6026CXXABI::~CXXABI() {} 6027