ASTContext.cpp revision c71a4915ca216847599d03cab4ed1c5086b0eb43
1bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org//===--- ASTContext.cpp - Context to hold long-lived AST nodes ------------===// 23484964a86451e86dcf04be9bd8c0d76ee04f081rossberg@chromium.org// 33484964a86451e86dcf04be9bd8c0d76ee04f081rossberg@chromium.org// The LLVM Compiler Infrastructure 4bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org// 5196eb601290dc49c3754da728dc58700dff2de1bmachenbach@chromium.org// This file is distributed under the University of Illinois Open Source 6bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org// License. See LICENSE.TXT for details. 7bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org// 8bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org//===----------------------------------------------------------------------===// 9bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org// 1069f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org// This file implements the ASTContext interface. 11bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org// 12bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org//===----------------------------------------------------------------------===// 13bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 14bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#include "clang/AST/ASTContext.h" 15bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#include "clang/AST/CharUnits.h" 16bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#include "clang/AST/DeclCXX.h" 17bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#include "clang/AST/DeclObjC.h" 18bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#include "clang/AST/DeclTemplate.h" 19bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#include "clang/AST/TypeLoc.h" 20bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#include "clang/AST/Expr.h" 21bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#include "clang/AST/ExprCXX.h" 22bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#include "clang/AST/ExternalASTSource.h" 23bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#include "clang/AST/RecordLayout.h" 24bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#include "clang/Basic/Builtins.h" 25bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#include "clang/Basic/SourceManager.h" 26bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#include "clang/Basic/TargetInfo.h" 27bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#include "llvm/ADT/SmallString.h" 28bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#include "llvm/ADT/StringExtras.h" 29bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#include "llvm/Support/MathExtras.h" 30bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#include "llvm/Support/raw_ostream.h" 31bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 32bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.orgusing namespace clang; 33bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 34bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.orgenum FloatingRank { 35bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org FloatRank, DoubleRank, LongDoubleRank 36bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org}; 37bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 38bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.orgASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 39bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org const TargetInfo &t, 40bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org IdentifierTable &idents, SelectorTable &sels, 41bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org Builtin::Context &builtins, 42bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org bool FreeMem, unsigned size_reserve) : 43bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org GlobalNestedNameSpecifier(0), CFConstantStringTypeDecl(0), 44bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org NSConstantStringTypeDecl(0), 45bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 46bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 47bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org SourceMgr(SM), LangOpts(LOpts), FreeMemory(FreeMem), Target(t), 48bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org Idents(idents), Selectors(sels), 49bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org BuiltinInfo(builtins), 50afb6326f5a59f22f94255389bf72fa7a9381742dbmeurer@chromium.org DeclarationNames(*this), 51bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org ExternalSource(0), PrintingPolicy(LOpts), 52bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org LastSDM(0, 0) { 53bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org ObjCIdRedefinitionType = QualType(); 5438de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org ObjCClassRedefinitionType = QualType(); 5538de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org ObjCSelRedefinitionType = QualType(); 5638de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org if (size_reserve > 0) Types.reserve(size_reserve); 57bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org TUDecl = TranslationUnitDecl::Create(*this); 58bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org InitBuiltinTypes(); 59bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org} 60bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 61bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.orgASTContext::~ASTContext() { 62bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org // Release the DenseMaps associated with DeclContext objects. 63bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org // FIXME: Is this the ideal solution? 64bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org ReleaseDeclContextMaps(); 65bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 66bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org if (!FreeMemory) { 67bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org // Call all of the deallocation functions. 68bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 69bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org Deallocations[I].first(Deallocations[I].second); 70bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org } 71bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 72fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org // Release all of the memory associated with overridden C++ methods. 73fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 74bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 75bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org OM != OMEnd; ++OM) 76bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org OM->second.Destroy(); 77bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 78bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org if (FreeMemory) { 79bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org // Deallocate all the types. 80bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org while (!Types.empty()) { 81bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org Types.back()->Destroy(*this); 82bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org Types.pop_back(); 83bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org } 84bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 85bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org for (llvm::FoldingSet<ExtQuals>::iterator 86bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org I = ExtQualNodes.begin(), E = ExtQualNodes.end(); I != E; ) { 87bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org // Increment in loop to prevent using deallocated memory. 88bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org Deallocate(&*I++); 89bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org } 90bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 91bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 92bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 93bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org // Increment in loop to prevent using deallocated memory. 94bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 95bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org R->Destroy(*this); 96bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org } 97bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 98bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org for (llvm::DenseMap<const ObjCContainerDecl*, 99bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org const ASTRecordLayout*>::iterator 100bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) { 101bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org // Increment in loop to prevent using deallocated memory. 102bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 103bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org R->Destroy(*this); 104bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org } 105bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org } 106bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 107bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org // Destroy nested-name-specifiers. 108bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org for (llvm::FoldingSet<NestedNameSpecifier>::iterator 109bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org NNS = NestedNameSpecifiers.begin(), 110bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org NNSEnd = NestedNameSpecifiers.end(); 111bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org NNS != NNSEnd; ) { 112bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org // Increment in loop to prevent using deallocated memory. 1136b6df382019a622ba20133e47bbe2e6f323b013bdslomov@chromium.org (*NNS++).Destroy(*this); 1146b6df382019a622ba20133e47bbe2e6f323b013bdslomov@chromium.org } 1156b6df382019a622ba20133e47bbe2e6f323b013bdslomov@chromium.org 116e3c177a423baa3c30225c4e422b6f6c76d38b951machenbach@chromium.org if (GlobalNestedNameSpecifier) 1176b6df382019a622ba20133e47bbe2e6f323b013bdslomov@chromium.org GlobalNestedNameSpecifier->Destroy(*this); 1186b6df382019a622ba20133e47bbe2e6f323b013bdslomov@chromium.org 1196b6df382019a622ba20133e47bbe2e6f323b013bdslomov@chromium.org TUDecl->Destroy(*this); 1206b6df382019a622ba20133e47bbe2e6f323b013bdslomov@chromium.org} 1216b6df382019a622ba20133e47bbe2e6f323b013bdslomov@chromium.org 1226b6df382019a622ba20133e47bbe2e6f323b013bdslomov@chromium.orgvoid ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 1236b6df382019a622ba20133e47bbe2e6f323b013bdslomov@chromium.org Deallocations.push_back(std::make_pair(Callback, Data)); 1246b6df382019a622ba20133e47bbe2e6f323b013bdslomov@chromium.org} 125e3c177a423baa3c30225c4e422b6f6c76d38b951machenbach@chromium.org 1266b6df382019a622ba20133e47bbe2e6f323b013bdslomov@chromium.orgvoid 1276b6df382019a622ba20133e47bbe2e6f323b013bdslomov@chromium.orgASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 1286b6df382019a622ba20133e47bbe2e6f323b013bdslomov@chromium.org ExternalSource.reset(Source.take()); 1296b6df382019a622ba20133e47bbe2e6f323b013bdslomov@chromium.org} 1306b6df382019a622ba20133e47bbe2e6f323b013bdslomov@chromium.org 131bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.orgvoid ASTContext::PrintStats() const { 132bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org fprintf(stderr, "*** AST Context Stats:\n"); 133bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org fprintf(stderr, " %d types total.\n", (int)Types.size()); 134bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 135bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org unsigned counts[] = { 136bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#define TYPE(Name, Parent) 0, 137bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#define ABSTRACT_TYPE(Name, Parent) 138bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#include "clang/AST/TypeNodes.def" 139bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 0 // Extra 140bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org }; 141bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 142bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org for (unsigned i = 0, e = Types.size(); i != e; ++i) { 143fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org Type *T = Types[i]; 144bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org counts[(unsigned)T->getTypeClass()]++; 145e3c177a423baa3c30225c4e422b6f6c76d38b951machenbach@chromium.org } 146bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 147bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org unsigned Idx = 0; 148bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org unsigned TotalBytes = 0; 149bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#define TYPE(Name, Parent) \ 150bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org if (counts[Idx]) \ 151bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 152bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org TotalBytes += counts[Idx] * sizeof(Name##Type); \ 153bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org ++Idx; 15469f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org#define ABSTRACT_TYPE(Name, Parent) 1556b6df382019a622ba20133e47bbe2e6f323b013bdslomov@chromium.org#include "clang/AST/TypeNodes.def" 156bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 157bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 158bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 159bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org if (ExternalSource.get()) { 160bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org fprintf(stderr, "\n"); 161bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org ExternalSource->PrintStats(); 162bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org } 16369f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org} 1642904d1a42292be3056c2dd3f98822f8e1470fa72machenbach@chromium.org 165bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 166bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.orgvoid ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 167fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 168fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 169bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org Types.push_back(Ty); 170bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org} 171bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 17269f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.orgvoid ASTContext::InitBuiltinTypes() { 1735de0074a922429f5e0ec2cf140c2d2989bf88140yangguo@chromium.org assert(VoidTy.isNull() && "Context reinitialized?"); 1745de0074a922429f5e0ec2cf140c2d2989bf88140yangguo@chromium.org 17569f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org // C99 6.2.5p19. 176fb732b17922ea75830be4db6b80534c4827d8a55jkummerow@chromium.org InitBuiltinType(VoidTy, BuiltinType::Void); 177fb732b17922ea75830be4db6b80534c4827d8a55jkummerow@chromium.org 178bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org // C99 6.2.5p2. 179fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org InitBuiltinType(BoolTy, BuiltinType::Bool); 180fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org // C99 6.2.5p3. 181fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org if (LangOpts.CharIsSigned) 18269f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org InitBuiltinType(CharTy, BuiltinType::Char_S); 1835de0074a922429f5e0ec2cf140c2d2989bf88140yangguo@chromium.org else 1845de0074a922429f5e0ec2cf140c2d2989bf88140yangguo@chromium.org InitBuiltinType(CharTy, BuiltinType::Char_U); 18569f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org // C99 6.2.5p4. 186fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org InitBuiltinType(SignedCharTy, BuiltinType::SChar); 187e3c177a423baa3c30225c4e422b6f6c76d38b951machenbach@chromium.org InitBuiltinType(ShortTy, BuiltinType::Short); 188fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org InitBuiltinType(IntTy, BuiltinType::Int); 189fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org InitBuiltinType(LongTy, BuiltinType::Long); 190fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org InitBuiltinType(LongLongTy, BuiltinType::LongLong); 191fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org 192bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org // C99 6.2.5p6. 193bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 194bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 195bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 196bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 197bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 198bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 199bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org // C99 6.2.5p10. 200bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org InitBuiltinType(FloatTy, BuiltinType::Float); 201bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org InitBuiltinType(DoubleTy, BuiltinType::Double); 202bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 203fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org 204fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org // GNU extension, 128-bit integers. 205fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org InitBuiltinType(Int128Ty, BuiltinType::Int128); 206fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 207fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org 208fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org if (LangOpts.CPlusPlus) // C++ 3.9.1p5 209fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org InitBuiltinType(WCharTy, BuiltinType::WChar); 210fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org else // C99 211bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org WCharTy = getFromTargetType(Target.getWCharType()); 212bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 213bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 214bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org InitBuiltinType(Char16Ty, BuiltinType::Char16); 215bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org else // C99 216bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org Char16Ty = getFromTargetType(Target.getChar16Type()); 217bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 218bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 219bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org InitBuiltinType(Char32Ty, BuiltinType::Char32); 220bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org else // C99 221bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org Char32Ty = getFromTargetType(Target.getChar32Type()); 222fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org 223fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org // Placeholder type for functions. 224fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org InitBuiltinType(OverloadTy, BuiltinType::Overload); 22538de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org 22638de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org // Placeholder type for type-dependent expressions whose type is 22738de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org // completely unknown. No code should ever check a type against 22838de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org // DependentTy and users should never see it; however, it is here to 22938de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org // help diagnose failures to properly check for type-dependent 23038de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org // expressions. 23138de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org InitBuiltinType(DependentTy, BuiltinType::Dependent); 23238de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org 23338de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org // Placeholder type for C++0x auto declarations whose real type has 23438de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org // not yet been deduced. 23538de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 23638de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org 23738de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org // C99 6.2.5p11. 23838de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org FloatComplexTy = getComplexType(FloatTy); 23938de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org DoubleComplexTy = getComplexType(DoubleTy); 24038de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org LongDoubleComplexTy = getComplexType(LongDoubleTy); 24138de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org 24238de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org BuiltinVaListType = QualType(); 24338de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org 24438de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 24538de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org ObjCIdTypedefType = QualType(); 24638de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org ObjCClassTypedefType = QualType(); 24738de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org ObjCSelTypedefType = QualType(); 24838de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org 24938de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org // Builtin types for 'id', 'Class', and 'SEL'. 25038de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 25138de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 25238de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 25338de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org 25438de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org ObjCConstantStringType = QualType(); 25538de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org 25638de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org // void * type 25738de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org VoidPtrTy = getPointerType(VoidTy); 25838de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org 25938de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org // nullptr type (C++0x 2.14.7) 26038de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 26138de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org} 26238de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org 26338de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.orgMemberSpecializationInfo * 26438de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.orgASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 26538de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org assert(Var->isStaticDataMember() && "Not a static data member"); 26638de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 26738de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org = InstantiatedFromStaticDataMember.find(Var); 26838de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org if (Pos == InstantiatedFromStaticDataMember.end()) 26938de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org return 0; 27038de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org 27138de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org return Pos->second; 27238de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org} 27338de99aae2d4efc5796aa6935c1648447ec32fc8machenbach@chromium.org 274fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.orgvoid 275bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.orgASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 276bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org TemplateSpecializationKind TSK) { 277bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org assert(Inst->isStaticDataMember() && "Not a static data member"); 278fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org assert(Tmpl->isStaticDataMember() && "Not a static data member"); 27969f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org assert(!InstantiatedFromStaticDataMember[Inst] && 28069f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org "Already noted what static data member was instantiated from"); 281e3c177a423baa3c30225c4e422b6f6c76d38b951machenbach@chromium.org InstantiatedFromStaticDataMember[Inst] 282fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org = new (*this) MemberSpecializationInfo(Tmpl, TSK); 283fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org} 284fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org 28569f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.orgNamedDecl * 2865de0074a922429f5e0ec2cf140c2d2989bf88140yangguo@chromium.orgASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 2875de0074a922429f5e0ec2cf140c2d2989bf88140yangguo@chromium.org llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 28869f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org = InstantiatedFromUsingDecl.find(UUD); 289bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org if (Pos == InstantiatedFromUsingDecl.end()) 290bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org return 0; 291bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 292bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org return Pos->second; 293bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org} 294bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 295bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.orgvoid 296bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.orgASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 297bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org assert((isa<UsingDecl>(Pattern) || 298bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org isa<UnresolvedUsingValueDecl>(Pattern) || 299bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org isa<UnresolvedUsingTypenameDecl>(Pattern)) && 300bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org "pattern decl is not a using decl"); 301bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 302bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org InstantiatedFromUsingDecl[Inst] = Pattern; 303bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org} 304bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 305bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.orgUsingShadowDecl * 306bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.orgASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 307bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 308bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org = InstantiatedFromUsingShadowDecl.find(Inst); 309bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org if (Pos == InstantiatedFromUsingShadowDecl.end()) 310bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org return 0; 311bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 312bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org return Pos->second; 313bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org} 314bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 315bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.orgvoid 316bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.orgASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 317bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org UsingShadowDecl *Pattern) { 318bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 319bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org InstantiatedFromUsingShadowDecl[Inst] = Pattern; 320bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org} 321bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 322bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.orgFieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 323bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 324bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org = InstantiatedFromUnnamedFieldDecl.find(Field); 325bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 326528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org return 0; 327528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org 328528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org return Pos->second; 329528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org} 330528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org 331528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.orgvoid ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 332528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org FieldDecl *Tmpl) { 333528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 334bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 335bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 336bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org "Already noted what unnamed field was instantiated from"); 337bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 338bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 339bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org} 340528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org 341528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.orgASTContext::overridden_cxx_method_iterator 342528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.orgASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 343528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 344528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org = OverriddenMethods.find(Method); 345528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org if (Pos == OverriddenMethods.end()) 346528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org return 0; 347528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org 348528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org return Pos->second.begin(); 349528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org} 350528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org 351528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.orgASTContext::overridden_cxx_method_iterator 352528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.orgASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 353528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 354528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org = OverriddenMethods.find(Method); 355528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org if (Pos == OverriddenMethods.end()) 356528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org return 0; 357528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org 358528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org return Pos->second.end(); 359528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org} 360528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org 361528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.orgvoid ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 362528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org const CXXMethodDecl *Overridden) { 363528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org OverriddenMethods[Method].push_back(Overridden); 364528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org} 365528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org 366528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.orgnamespace { 367528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org class BeforeInTranslationUnit 368528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org : std::binary_function<SourceRange, SourceRange, bool> { 369528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org SourceManager *SourceMgr; 370528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org 371528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org public: 372528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org explicit BeforeInTranslationUnit(SourceManager *SM) : SourceMgr(SM) { } 373528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org 374bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org bool operator()(SourceRange X, SourceRange Y) { 375bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org return SourceMgr->isBeforeInTranslationUnit(X.getBegin(), Y.getBegin()); 376bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org } 377bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org }; 378bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org} 379bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 380bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org//===----------------------------------------------------------------------===// 381bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org// Type Sizing and Analysis 382bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org//===----------------------------------------------------------------------===// 383bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 384bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 385bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org/// scalar floating point type. 386bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.orgconst llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 387bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org const BuiltinType *BT = T->getAs<BuiltinType>(); 388bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org assert(BT && "Not a floating point type!"); 389bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org switch (BT->getKind()) { 390bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org default: assert(0 && "Not a floating point type!"); 391bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org case BuiltinType::Float: return Target.getFloatFormat(); 392bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org case BuiltinType::Double: return Target.getDoubleFormat(); 393bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 394bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org } 395bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org} 396bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 397bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org/// getDeclAlign - Return a conservative estimate of the alignment of the 39869f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org/// specified decl. Note that bitfields do not have a valid alignment, so 3995de0074a922429f5e0ec2cf140c2d2989bf88140yangguo@chromium.org/// this method will assert on them. 4005de0074a922429f5e0ec2cf140c2d2989bf88140yangguo@chromium.org/// If @p RefAsPointee, references are treated like their underlying type 40169f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org/// (for alignof), else they're treated like pointers (for CodeGen). 402bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.orgCharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) { 403fb732b17922ea75830be4db6b80534c4827d8a55jkummerow@chromium.org unsigned Align = Target.getCharWidth(); 404fb732b17922ea75830be4db6b80534c4827d8a55jkummerow@chromium.org 40569f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 4065de0074a922429f5e0ec2cf140c2d2989bf88140yangguo@chromium.org Align = std::max(Align, AA->getMaxAlignment()); 4075de0074a922429f5e0ec2cf140c2d2989bf88140yangguo@chromium.org 40869f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 409bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org QualType T = VD->getType(); 410fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 41169f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org if (RefAsPointee) 41269f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org T = RT->getPointeeType(); 41369f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org else 41469f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org T = getPointerType(RT->getPointeeType()); 41569f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org } 41669f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org if (!T->isIncompleteType() && !T->isFunctionType()) { 41769f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org // Incomplete or function types default to 1. 41869f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 41969f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org T = cast<ArrayType>(T)->getElementType(); 42069f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org 42169f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 42269f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org } 42369f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org if (const FieldDecl *FD = dyn_cast<FieldDecl>(VD)) { 424fb79f8683208e62002112b4406ec9dadda54dec2machenbach@chromium.org // In the case of a field in a packed struct, we want the minimum 4250f6d2bb71d05a2a2fa33acccf8a0ef762e57148fhpayer@chromium.org // of the alignment of the field and the alignment of the struct. 4260f6d2bb71d05a2a2fa33acccf8a0ef762e57148fhpayer@chromium.org Align = std::min(Align, 427bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org getPreferredTypeAlign(FD->getParent()->getTypeForDecl())); 428bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org } 429bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org } 430bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 431bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org return CharUnits::fromQuantity(Align / Target.getCharWidth()); 432bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org} 433bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 434bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.orgstd::pair<CharUnits, CharUnits> 435bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.orgASTContext::getTypeInfoInChars(const Type *T) { 436bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 437bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org return std::make_pair(CharUnits::fromQuantity(Info.first / getCharWidth()), 438bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org CharUnits::fromQuantity(Info.second / getCharWidth())); 439bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org} 440bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 44169f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.orgstd::pair<CharUnits, CharUnits> 4425de0074a922429f5e0ec2cf140c2d2989bf88140yangguo@chromium.orgASTContext::getTypeInfoInChars(QualType T) { 4435de0074a922429f5e0ec2cf140c2d2989bf88140yangguo@chromium.org return getTypeInfoInChars(T.getTypePtr()); 44469f64b1a8bfa6f5418b7c1f71d4e0833f76e93edmachenbach@chromium.org} 445bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 446bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org/// getTypeSize - Return the size of the specified type, in bits. This method 447bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org/// does not work on incomplete types. 448bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org/// 449528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org/// FIXME: Pointers into different addr spaces could have different sizes and 450528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org/// alignment requirements: getPointerInfo should take an AddrSpace, this 451528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org/// should take a QualType, &c. 452bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.orgstd::pair<uint64_t, unsigned> 453528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.orgASTContext::getTypeInfo(const Type *T) { 454528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org uint64_t Width=0; 455528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org unsigned Align=8; 456bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org switch (T->getTypeClass()) { 457bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#define TYPE(Class, Base) 458bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#define ABSTRACT_TYPE(Class, Base) 459bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#define NON_CANONICAL_TYPE(Class, Base) 460bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org#define DEPENDENT_TYPE(Class, Base) case Type::Class: 461528ce02b8680a3ab6d75c7079f180a4016c69b7amachenbach@chromium.org#include "clang/AST/TypeNodes.def" 462bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org assert(false && "Should not see dependent types"); 463bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org break; 464bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org 465bee51999422c0eeaae85ed99b5c0bd4126510ff1danno@chromium.org case Type::FunctionNoProto: 466 case Type::FunctionProto: 467 // GCC extension: alignof(function) = 32 bits 468 Width = 0; 469 Align = 32; 470 break; 471 472 case Type::IncompleteArray: 473 case Type::VariableArray: 474 Width = 0; 475 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 476 break; 477 478 case Type::ConstantArray: { 479 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 480 481 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 482 Width = EltInfo.first*CAT->getSize().getZExtValue(); 483 Align = EltInfo.second; 484 break; 485 } 486 case Type::ExtVector: 487 case Type::Vector: { 488 const VectorType *VT = cast<VectorType>(T); 489 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 490 Width = EltInfo.first*VT->getNumElements(); 491 Align = Width; 492 // If the alignment is not a power of 2, round up to the next power of 2. 493 // This happens for non-power-of-2 length vectors. 494 if (Align & (Align-1)) { 495 Align = llvm::NextPowerOf2(Align); 496 Width = llvm::RoundUpToAlignment(Width, Align); 497 } 498 break; 499 } 500 501 case Type::Builtin: 502 switch (cast<BuiltinType>(T)->getKind()) { 503 default: assert(0 && "Unknown builtin type!"); 504 case BuiltinType::Void: 505 // GCC extension: alignof(void) = 8 bits. 506 Width = 0; 507 Align = 8; 508 break; 509 510 case BuiltinType::Bool: 511 Width = Target.getBoolWidth(); 512 Align = Target.getBoolAlign(); 513 break; 514 case BuiltinType::Char_S: 515 case BuiltinType::Char_U: 516 case BuiltinType::UChar: 517 case BuiltinType::SChar: 518 Width = Target.getCharWidth(); 519 Align = Target.getCharAlign(); 520 break; 521 case BuiltinType::WChar: 522 Width = Target.getWCharWidth(); 523 Align = Target.getWCharAlign(); 524 break; 525 case BuiltinType::Char16: 526 Width = Target.getChar16Width(); 527 Align = Target.getChar16Align(); 528 break; 529 case BuiltinType::Char32: 530 Width = Target.getChar32Width(); 531 Align = Target.getChar32Align(); 532 break; 533 case BuiltinType::UShort: 534 case BuiltinType::Short: 535 Width = Target.getShortWidth(); 536 Align = Target.getShortAlign(); 537 break; 538 case BuiltinType::UInt: 539 case BuiltinType::Int: 540 Width = Target.getIntWidth(); 541 Align = Target.getIntAlign(); 542 break; 543 case BuiltinType::ULong: 544 case BuiltinType::Long: 545 Width = Target.getLongWidth(); 546 Align = Target.getLongAlign(); 547 break; 548 case BuiltinType::ULongLong: 549 case BuiltinType::LongLong: 550 Width = Target.getLongLongWidth(); 551 Align = Target.getLongLongAlign(); 552 break; 553 case BuiltinType::Int128: 554 case BuiltinType::UInt128: 555 Width = 128; 556 Align = 128; // int128_t is 128-bit aligned on all targets. 557 break; 558 case BuiltinType::Float: 559 Width = Target.getFloatWidth(); 560 Align = Target.getFloatAlign(); 561 break; 562 case BuiltinType::Double: 563 Width = Target.getDoubleWidth(); 564 Align = Target.getDoubleAlign(); 565 break; 566 case BuiltinType::LongDouble: 567 Width = Target.getLongDoubleWidth(); 568 Align = Target.getLongDoubleAlign(); 569 break; 570 case BuiltinType::NullPtr: 571 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 572 Align = Target.getPointerAlign(0); // == sizeof(void*) 573 break; 574 } 575 break; 576 case Type::ObjCObjectPointer: 577 Width = Target.getPointerWidth(0); 578 Align = Target.getPointerAlign(0); 579 break; 580 case Type::BlockPointer: { 581 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 582 Width = Target.getPointerWidth(AS); 583 Align = Target.getPointerAlign(AS); 584 break; 585 } 586 case Type::LValueReference: 587 case Type::RValueReference: { 588 // alignof and sizeof should never enter this code path here, so we go 589 // the pointer route. 590 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 591 Width = Target.getPointerWidth(AS); 592 Align = Target.getPointerAlign(AS); 593 break; 594 } 595 case Type::Pointer: { 596 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 597 Width = Target.getPointerWidth(AS); 598 Align = Target.getPointerAlign(AS); 599 break; 600 } 601 case Type::MemberPointer: { 602 QualType Pointee = cast<MemberPointerType>(T)->getPointeeType(); 603 std::pair<uint64_t, unsigned> PtrDiffInfo = 604 getTypeInfo(getPointerDiffType()); 605 Width = PtrDiffInfo.first; 606 if (Pointee->isFunctionType()) 607 Width *= 2; 608 Align = PtrDiffInfo.second; 609 break; 610 } 611 case Type::Complex: { 612 // Complex types have the same alignment as their elements, but twice the 613 // size. 614 std::pair<uint64_t, unsigned> EltInfo = 615 getTypeInfo(cast<ComplexType>(T)->getElementType()); 616 Width = EltInfo.first*2; 617 Align = EltInfo.second; 618 break; 619 } 620 case Type::ObjCObject: 621 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 622 case Type::ObjCInterface: { 623 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 624 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 625 Width = Layout.getSize(); 626 Align = Layout.getAlignment(); 627 break; 628 } 629 case Type::Record: 630 case Type::Enum: { 631 const TagType *TT = cast<TagType>(T); 632 633 if (TT->getDecl()->isInvalidDecl()) { 634 Width = 1; 635 Align = 1; 636 break; 637 } 638 639 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 640 return getTypeInfo(ET->getDecl()->getIntegerType()); 641 642 const RecordType *RT = cast<RecordType>(TT); 643 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 644 Width = Layout.getSize(); 645 Align = Layout.getAlignment(); 646 break; 647 } 648 649 case Type::SubstTemplateTypeParm: 650 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 651 getReplacementType().getTypePtr()); 652 653 case Type::Typedef: { 654 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 655 if (const AlignedAttr *Aligned = Typedef->getAttr<AlignedAttr>()) { 656 Align = std::max(Aligned->getMaxAlignment(), 657 getTypeAlign(Typedef->getUnderlyingType().getTypePtr())); 658 Width = getTypeSize(Typedef->getUnderlyingType().getTypePtr()); 659 } else 660 return getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 661 break; 662 } 663 664 case Type::TypeOfExpr: 665 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 666 .getTypePtr()); 667 668 case Type::TypeOf: 669 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 670 671 case Type::Decltype: 672 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 673 .getTypePtr()); 674 675 case Type::Elaborated: 676 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 677 678 case Type::TemplateSpecialization: 679 assert(getCanonicalType(T) != T && 680 "Cannot request the size of a dependent type"); 681 // FIXME: this is likely to be wrong once we support template 682 // aliases, since a template alias could refer to a typedef that 683 // has an __aligned__ attribute on it. 684 return getTypeInfo(getCanonicalType(T)); 685 } 686 687 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 688 return std::make_pair(Width, Align); 689} 690 691/// getTypeSizeInChars - Return the size of the specified type, in characters. 692/// This method does not work on incomplete types. 693CharUnits ASTContext::getTypeSizeInChars(QualType T) { 694 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 695} 696CharUnits ASTContext::getTypeSizeInChars(const Type *T) { 697 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 698} 699 700/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 701/// characters. This method does not work on incomplete types. 702CharUnits ASTContext::getTypeAlignInChars(QualType T) { 703 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 704} 705CharUnits ASTContext::getTypeAlignInChars(const Type *T) { 706 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 707} 708 709/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 710/// type for the current target in bits. This can be different than the ABI 711/// alignment in cases where it is beneficial for performance to overalign 712/// a data type. 713unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 714 unsigned ABIAlign = getTypeAlign(T); 715 716 // Double and long long should be naturally aligned if possible. 717 if (const ComplexType* CT = T->getAs<ComplexType>()) 718 T = CT->getElementType().getTypePtr(); 719 if (T->isSpecificBuiltinType(BuiltinType::Double) || 720 T->isSpecificBuiltinType(BuiltinType::LongLong)) 721 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 722 723 return ABIAlign; 724} 725 726static void CollectLocalObjCIvars(ASTContext *Ctx, 727 const ObjCInterfaceDecl *OI, 728 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 729 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 730 E = OI->ivar_end(); I != E; ++I) { 731 ObjCIvarDecl *IVDecl = *I; 732 if (!IVDecl->isInvalidDecl()) 733 Fields.push_back(cast<FieldDecl>(IVDecl)); 734 } 735} 736 737void ASTContext::CollectObjCIvars(const ObjCInterfaceDecl *OI, 738 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 739 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 740 CollectObjCIvars(SuperClass, Fields); 741 CollectLocalObjCIvars(this, OI, Fields); 742} 743 744/// ShallowCollectObjCIvars - 745/// Collect all ivars, including those synthesized, in the current class. 746/// 747void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 748 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 749 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 750 E = OI->ivar_end(); I != E; ++I) { 751 Ivars.push_back(*I); 752 } 753 754 CollectNonClassIvars(OI, Ivars); 755} 756 757/// CollectNonClassIvars - 758/// This routine collects all other ivars which are not declared in the class. 759/// This includes synthesized ivars (via @synthesize) and those in 760// class's @implementation. 761/// 762void ASTContext::CollectNonClassIvars(const ObjCInterfaceDecl *OI, 763 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 764 // Find ivars declared in class extension. 765 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) { 766 for (ObjCCategoryDecl::ivar_iterator I = CDecl->ivar_begin(), 767 E = CDecl->ivar_end(); I != E; ++I) { 768 Ivars.push_back(*I); 769 } 770 } 771 772 // Also add any ivar defined in this class's implementation. This 773 // includes synthesized ivars. 774 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) { 775 for (ObjCImplementationDecl::ivar_iterator I = ImplDecl->ivar_begin(), 776 E = ImplDecl->ivar_end(); I != E; ++I) 777 Ivars.push_back(*I); 778 } 779} 780 781/// CollectInheritedProtocols - Collect all protocols in current class and 782/// those inherited by it. 783void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 784 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 785 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 786 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 787 PE = OI->protocol_end(); P != PE; ++P) { 788 ObjCProtocolDecl *Proto = (*P); 789 Protocols.insert(Proto); 790 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 791 PE = Proto->protocol_end(); P != PE; ++P) { 792 Protocols.insert(*P); 793 CollectInheritedProtocols(*P, Protocols); 794 } 795 } 796 797 // Categories of this Interface. 798 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 799 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 800 CollectInheritedProtocols(CDeclChain, Protocols); 801 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 802 while (SD) { 803 CollectInheritedProtocols(SD, Protocols); 804 SD = SD->getSuperClass(); 805 } 806 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 807 for (ObjCInterfaceDecl::protocol_iterator P = OC->protocol_begin(), 808 PE = OC->protocol_end(); P != PE; ++P) { 809 ObjCProtocolDecl *Proto = (*P); 810 Protocols.insert(Proto); 811 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 812 PE = Proto->protocol_end(); P != PE; ++P) 813 CollectInheritedProtocols(*P, Protocols); 814 } 815 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 816 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 817 PE = OP->protocol_end(); P != PE; ++P) { 818 ObjCProtocolDecl *Proto = (*P); 819 Protocols.insert(Proto); 820 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 821 PE = Proto->protocol_end(); P != PE; ++P) 822 CollectInheritedProtocols(*P, Protocols); 823 } 824 } 825} 826 827unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) { 828 unsigned count = 0; 829 // Count ivars declared in class extension. 830 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) 831 count += CDecl->ivar_size(); 832 833 // Count ivar defined in this class's implementation. This 834 // includes synthesized ivars. 835 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 836 count += ImplDecl->ivar_size(); 837 838 return count; 839} 840 841/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 842ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 843 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 844 I = ObjCImpls.find(D); 845 if (I != ObjCImpls.end()) 846 return cast<ObjCImplementationDecl>(I->second); 847 return 0; 848} 849/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 850ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 851 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 852 I = ObjCImpls.find(D); 853 if (I != ObjCImpls.end()) 854 return cast<ObjCCategoryImplDecl>(I->second); 855 return 0; 856} 857 858/// \brief Set the implementation of ObjCInterfaceDecl. 859void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 860 ObjCImplementationDecl *ImplD) { 861 assert(IFaceD && ImplD && "Passed null params"); 862 ObjCImpls[IFaceD] = ImplD; 863} 864/// \brief Set the implementation of ObjCCategoryDecl. 865void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 866 ObjCCategoryImplDecl *ImplD) { 867 assert(CatD && ImplD && "Passed null params"); 868 ObjCImpls[CatD] = ImplD; 869} 870 871/// \brief Allocate an uninitialized TypeSourceInfo. 872/// 873/// The caller should initialize the memory held by TypeSourceInfo using 874/// the TypeLoc wrappers. 875/// 876/// \param T the type that will be the basis for type source info. This type 877/// should refer to how the declarator was written in source code, not to 878/// what type semantic analysis resolved the declarator to. 879TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 880 unsigned DataSize) { 881 if (!DataSize) 882 DataSize = TypeLoc::getFullDataSizeForType(T); 883 else 884 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 885 "incorrect data size provided to CreateTypeSourceInfo!"); 886 887 TypeSourceInfo *TInfo = 888 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 889 new (TInfo) TypeSourceInfo(T); 890 return TInfo; 891} 892 893TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 894 SourceLocation L) { 895 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 896 DI->getTypeLoc().initialize(L); 897 return DI; 898} 899 900const ASTRecordLayout & 901ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 902 return getObjCLayout(D, 0); 903} 904 905const ASTRecordLayout & 906ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 907 return getObjCLayout(D->getClassInterface(), D); 908} 909 910//===----------------------------------------------------------------------===// 911// Type creation/memoization methods 912//===----------------------------------------------------------------------===// 913 914QualType ASTContext::getExtQualType(const Type *TypeNode, Qualifiers Quals) { 915 unsigned Fast = Quals.getFastQualifiers(); 916 Quals.removeFastQualifiers(); 917 918 // Check if we've already instantiated this type. 919 llvm::FoldingSetNodeID ID; 920 ExtQuals::Profile(ID, TypeNode, Quals); 921 void *InsertPos = 0; 922 if (ExtQuals *EQ = ExtQualNodes.FindNodeOrInsertPos(ID, InsertPos)) { 923 assert(EQ->getQualifiers() == Quals); 924 QualType T = QualType(EQ, Fast); 925 return T; 926 } 927 928 ExtQuals *New = new (*this, TypeAlignment) ExtQuals(*this, TypeNode, Quals); 929 ExtQualNodes.InsertNode(New, InsertPos); 930 QualType T = QualType(New, Fast); 931 return T; 932} 933 934QualType ASTContext::getVolatileType(QualType T) { 935 QualType CanT = getCanonicalType(T); 936 if (CanT.isVolatileQualified()) return T; 937 938 QualifierCollector Quals; 939 const Type *TypeNode = Quals.strip(T); 940 Quals.addVolatile(); 941 942 return getExtQualType(TypeNode, Quals); 943} 944 945QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 946 QualType CanT = getCanonicalType(T); 947 if (CanT.getAddressSpace() == AddressSpace) 948 return T; 949 950 // If we are composing extended qualifiers together, merge together 951 // into one ExtQuals node. 952 QualifierCollector Quals; 953 const Type *TypeNode = Quals.strip(T); 954 955 // If this type already has an address space specified, it cannot get 956 // another one. 957 assert(!Quals.hasAddressSpace() && 958 "Type cannot be in multiple addr spaces!"); 959 Quals.addAddressSpace(AddressSpace); 960 961 return getExtQualType(TypeNode, Quals); 962} 963 964QualType ASTContext::getObjCGCQualType(QualType T, 965 Qualifiers::GC GCAttr) { 966 QualType CanT = getCanonicalType(T); 967 if (CanT.getObjCGCAttr() == GCAttr) 968 return T; 969 970 if (T->isPointerType()) { 971 QualType Pointee = T->getAs<PointerType>()->getPointeeType(); 972 if (Pointee->isAnyPointerType()) { 973 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 974 return getPointerType(ResultType); 975 } 976 } 977 978 // If we are composing extended qualifiers together, merge together 979 // into one ExtQuals node. 980 QualifierCollector Quals; 981 const Type *TypeNode = Quals.strip(T); 982 983 // If this type already has an ObjCGC specified, it cannot get 984 // another one. 985 assert(!Quals.hasObjCGCAttr() && 986 "Type cannot have multiple ObjCGCs!"); 987 Quals.addObjCGCAttr(GCAttr); 988 989 return getExtQualType(TypeNode, Quals); 990} 991 992static QualType getExtFunctionType(ASTContext& Context, QualType T, 993 const FunctionType::ExtInfo &Info) { 994 QualType ResultType; 995 if (const PointerType *Pointer = T->getAs<PointerType>()) { 996 QualType Pointee = Pointer->getPointeeType(); 997 ResultType = getExtFunctionType(Context, Pointee, Info); 998 if (ResultType == Pointee) 999 return T; 1000 1001 ResultType = Context.getPointerType(ResultType); 1002 } else if (const BlockPointerType *BlockPointer 1003 = T->getAs<BlockPointerType>()) { 1004 QualType Pointee = BlockPointer->getPointeeType(); 1005 ResultType = getExtFunctionType(Context, Pointee, Info); 1006 if (ResultType == Pointee) 1007 return T; 1008 1009 ResultType = Context.getBlockPointerType(ResultType); 1010 } else if (const FunctionType *F = T->getAs<FunctionType>()) { 1011 if (F->getExtInfo() == Info) 1012 return T; 1013 1014 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(F)) { 1015 ResultType = Context.getFunctionNoProtoType(FNPT->getResultType(), 1016 Info); 1017 } else { 1018 const FunctionProtoType *FPT = cast<FunctionProtoType>(F); 1019 ResultType 1020 = Context.getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1021 FPT->getNumArgs(), FPT->isVariadic(), 1022 FPT->getTypeQuals(), 1023 FPT->hasExceptionSpec(), 1024 FPT->hasAnyExceptionSpec(), 1025 FPT->getNumExceptions(), 1026 FPT->exception_begin(), 1027 Info); 1028 } 1029 } else 1030 return T; 1031 1032 return Context.getQualifiedType(ResultType, T.getLocalQualifiers()); 1033} 1034 1035QualType ASTContext::getNoReturnType(QualType T, bool AddNoReturn) { 1036 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1037 return getExtFunctionType(*this, T, 1038 Info.withNoReturn(AddNoReturn)); 1039} 1040 1041QualType ASTContext::getCallConvType(QualType T, CallingConv CallConv) { 1042 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1043 return getExtFunctionType(*this, T, 1044 Info.withCallingConv(CallConv)); 1045} 1046 1047QualType ASTContext::getRegParmType(QualType T, unsigned RegParm) { 1048 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1049 return getExtFunctionType(*this, T, 1050 Info.withRegParm(RegParm)); 1051} 1052 1053/// getComplexType - Return the uniqued reference to the type for a complex 1054/// number with the specified element type. 1055QualType ASTContext::getComplexType(QualType T) { 1056 // Unique pointers, to guarantee there is only one pointer of a particular 1057 // structure. 1058 llvm::FoldingSetNodeID ID; 1059 ComplexType::Profile(ID, T); 1060 1061 void *InsertPos = 0; 1062 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1063 return QualType(CT, 0); 1064 1065 // If the pointee type isn't canonical, this won't be a canonical type either, 1066 // so fill in the canonical type field. 1067 QualType Canonical; 1068 if (!T.isCanonical()) { 1069 Canonical = getComplexType(getCanonicalType(T)); 1070 1071 // Get the new insert position for the node we care about. 1072 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1073 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1074 } 1075 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1076 Types.push_back(New); 1077 ComplexTypes.InsertNode(New, InsertPos); 1078 return QualType(New, 0); 1079} 1080 1081/// getPointerType - Return the uniqued reference to the type for a pointer to 1082/// the specified type. 1083QualType ASTContext::getPointerType(QualType T) { 1084 // Unique pointers, to guarantee there is only one pointer of a particular 1085 // structure. 1086 llvm::FoldingSetNodeID ID; 1087 PointerType::Profile(ID, T); 1088 1089 void *InsertPos = 0; 1090 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1091 return QualType(PT, 0); 1092 1093 // If the pointee type isn't canonical, this won't be a canonical type either, 1094 // so fill in the canonical type field. 1095 QualType Canonical; 1096 if (!T.isCanonical()) { 1097 Canonical = getPointerType(getCanonicalType(T)); 1098 1099 // Get the new insert position for the node we care about. 1100 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1101 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1102 } 1103 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1104 Types.push_back(New); 1105 PointerTypes.InsertNode(New, InsertPos); 1106 return QualType(New, 0); 1107} 1108 1109/// getBlockPointerType - Return the uniqued reference to the type for 1110/// a pointer to the specified block. 1111QualType ASTContext::getBlockPointerType(QualType T) { 1112 assert(T->isFunctionType() && "block of function types only"); 1113 // Unique pointers, to guarantee there is only one block of a particular 1114 // structure. 1115 llvm::FoldingSetNodeID ID; 1116 BlockPointerType::Profile(ID, T); 1117 1118 void *InsertPos = 0; 1119 if (BlockPointerType *PT = 1120 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1121 return QualType(PT, 0); 1122 1123 // If the block pointee type isn't canonical, this won't be a canonical 1124 // type either so fill in the canonical type field. 1125 QualType Canonical; 1126 if (!T.isCanonical()) { 1127 Canonical = getBlockPointerType(getCanonicalType(T)); 1128 1129 // Get the new insert position for the node we care about. 1130 BlockPointerType *NewIP = 1131 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1132 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1133 } 1134 BlockPointerType *New 1135 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1136 Types.push_back(New); 1137 BlockPointerTypes.InsertNode(New, InsertPos); 1138 return QualType(New, 0); 1139} 1140 1141/// getLValueReferenceType - Return the uniqued reference to the type for an 1142/// lvalue reference to the specified type. 1143QualType ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) { 1144 // Unique pointers, to guarantee there is only one pointer of a particular 1145 // structure. 1146 llvm::FoldingSetNodeID ID; 1147 ReferenceType::Profile(ID, T, SpelledAsLValue); 1148 1149 void *InsertPos = 0; 1150 if (LValueReferenceType *RT = 1151 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1152 return QualType(RT, 0); 1153 1154 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1155 1156 // If the referencee type isn't canonical, this won't be a canonical type 1157 // either, so fill in the canonical type field. 1158 QualType Canonical; 1159 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1160 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1161 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1162 1163 // Get the new insert position for the node we care about. 1164 LValueReferenceType *NewIP = 1165 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1166 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1167 } 1168 1169 LValueReferenceType *New 1170 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1171 SpelledAsLValue); 1172 Types.push_back(New); 1173 LValueReferenceTypes.InsertNode(New, InsertPos); 1174 1175 return QualType(New, 0); 1176} 1177 1178/// getRValueReferenceType - Return the uniqued reference to the type for an 1179/// rvalue reference to the specified type. 1180QualType ASTContext::getRValueReferenceType(QualType T) { 1181 // Unique pointers, to guarantee there is only one pointer of a particular 1182 // structure. 1183 llvm::FoldingSetNodeID ID; 1184 ReferenceType::Profile(ID, T, false); 1185 1186 void *InsertPos = 0; 1187 if (RValueReferenceType *RT = 1188 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1189 return QualType(RT, 0); 1190 1191 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1192 1193 // If the referencee type isn't canonical, this won't be a canonical type 1194 // either, so fill in the canonical type field. 1195 QualType Canonical; 1196 if (InnerRef || !T.isCanonical()) { 1197 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1198 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1199 1200 // Get the new insert position for the node we care about. 1201 RValueReferenceType *NewIP = 1202 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1203 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1204 } 1205 1206 RValueReferenceType *New 1207 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1208 Types.push_back(New); 1209 RValueReferenceTypes.InsertNode(New, InsertPos); 1210 return QualType(New, 0); 1211} 1212 1213/// getMemberPointerType - Return the uniqued reference to the type for a 1214/// member pointer to the specified type, in the specified class. 1215QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) { 1216 // Unique pointers, to guarantee there is only one pointer of a particular 1217 // structure. 1218 llvm::FoldingSetNodeID ID; 1219 MemberPointerType::Profile(ID, T, Cls); 1220 1221 void *InsertPos = 0; 1222 if (MemberPointerType *PT = 1223 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1224 return QualType(PT, 0); 1225 1226 // If the pointee or class type isn't canonical, this won't be a canonical 1227 // type either, so fill in the canonical type field. 1228 QualType Canonical; 1229 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1230 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1231 1232 // Get the new insert position for the node we care about. 1233 MemberPointerType *NewIP = 1234 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1235 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1236 } 1237 MemberPointerType *New 1238 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1239 Types.push_back(New); 1240 MemberPointerTypes.InsertNode(New, InsertPos); 1241 return QualType(New, 0); 1242} 1243 1244/// getConstantArrayType - Return the unique reference to the type for an 1245/// array of the specified element type. 1246QualType ASTContext::getConstantArrayType(QualType EltTy, 1247 const llvm::APInt &ArySizeIn, 1248 ArrayType::ArraySizeModifier ASM, 1249 unsigned EltTypeQuals) { 1250 assert((EltTy->isDependentType() || 1251 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1252 "Constant array of VLAs is illegal!"); 1253 1254 // Convert the array size into a canonical width matching the pointer size for 1255 // the target. 1256 llvm::APInt ArySize(ArySizeIn); 1257 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1258 1259 llvm::FoldingSetNodeID ID; 1260 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1261 1262 void *InsertPos = 0; 1263 if (ConstantArrayType *ATP = 1264 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1265 return QualType(ATP, 0); 1266 1267 // If the element type isn't canonical, this won't be a canonical type either, 1268 // so fill in the canonical type field. 1269 QualType Canonical; 1270 if (!EltTy.isCanonical()) { 1271 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1272 ASM, EltTypeQuals); 1273 // Get the new insert position for the node we care about. 1274 ConstantArrayType *NewIP = 1275 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1276 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1277 } 1278 1279 ConstantArrayType *New = new(*this,TypeAlignment) 1280 ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1281 ConstantArrayTypes.InsertNode(New, InsertPos); 1282 Types.push_back(New); 1283 return QualType(New, 0); 1284} 1285 1286/// getVariableArrayType - Returns a non-unique reference to the type for a 1287/// variable array of the specified element type. 1288QualType ASTContext::getVariableArrayType(QualType EltTy, 1289 Expr *NumElts, 1290 ArrayType::ArraySizeModifier ASM, 1291 unsigned EltTypeQuals, 1292 SourceRange Brackets) { 1293 // Since we don't unique expressions, it isn't possible to unique VLA's 1294 // that have an expression provided for their size. 1295 QualType CanonType; 1296 1297 if (!EltTy.isCanonical()) { 1298 if (NumElts) 1299 NumElts->Retain(); 1300 CanonType = getVariableArrayType(getCanonicalType(EltTy), NumElts, ASM, 1301 EltTypeQuals, Brackets); 1302 } 1303 1304 VariableArrayType *New = new(*this, TypeAlignment) 1305 VariableArrayType(EltTy, CanonType, NumElts, ASM, EltTypeQuals, Brackets); 1306 1307 VariableArrayTypes.push_back(New); 1308 Types.push_back(New); 1309 return QualType(New, 0); 1310} 1311 1312/// getDependentSizedArrayType - Returns a non-unique reference to 1313/// the type for a dependently-sized array of the specified element 1314/// type. 1315QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1316 Expr *NumElts, 1317 ArrayType::ArraySizeModifier ASM, 1318 unsigned EltTypeQuals, 1319 SourceRange Brackets) { 1320 assert((!NumElts || NumElts->isTypeDependent() || 1321 NumElts->isValueDependent()) && 1322 "Size must be type- or value-dependent!"); 1323 1324 void *InsertPos = 0; 1325 DependentSizedArrayType *Canon = 0; 1326 llvm::FoldingSetNodeID ID; 1327 1328 if (NumElts) { 1329 // Dependently-sized array types that do not have a specified 1330 // number of elements will have their sizes deduced from an 1331 // initializer. 1332 DependentSizedArrayType::Profile(ID, *this, getCanonicalType(EltTy), ASM, 1333 EltTypeQuals, NumElts); 1334 1335 Canon = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1336 } 1337 1338 DependentSizedArrayType *New; 1339 if (Canon) { 1340 // We already have a canonical version of this array type; use it as 1341 // the canonical type for a newly-built type. 1342 New = new (*this, TypeAlignment) 1343 DependentSizedArrayType(*this, EltTy, QualType(Canon, 0), 1344 NumElts, ASM, EltTypeQuals, Brackets); 1345 } else { 1346 QualType CanonEltTy = getCanonicalType(EltTy); 1347 if (CanonEltTy == EltTy) { 1348 New = new (*this, TypeAlignment) 1349 DependentSizedArrayType(*this, EltTy, QualType(), 1350 NumElts, ASM, EltTypeQuals, Brackets); 1351 1352 if (NumElts) { 1353 DependentSizedArrayType *CanonCheck 1354 = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1355 assert(!CanonCheck && "Dependent-sized canonical array type broken"); 1356 (void)CanonCheck; 1357 DependentSizedArrayTypes.InsertNode(New, InsertPos); 1358 } 1359 } else { 1360 QualType Canon = getDependentSizedArrayType(CanonEltTy, NumElts, 1361 ASM, EltTypeQuals, 1362 SourceRange()); 1363 New = new (*this, TypeAlignment) 1364 DependentSizedArrayType(*this, EltTy, Canon, 1365 NumElts, ASM, EltTypeQuals, Brackets); 1366 } 1367 } 1368 1369 Types.push_back(New); 1370 return QualType(New, 0); 1371} 1372 1373QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1374 ArrayType::ArraySizeModifier ASM, 1375 unsigned EltTypeQuals) { 1376 llvm::FoldingSetNodeID ID; 1377 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1378 1379 void *InsertPos = 0; 1380 if (IncompleteArrayType *ATP = 1381 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1382 return QualType(ATP, 0); 1383 1384 // If the element type isn't canonical, this won't be a canonical type 1385 // either, so fill in the canonical type field. 1386 QualType Canonical; 1387 1388 if (!EltTy.isCanonical()) { 1389 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1390 ASM, EltTypeQuals); 1391 1392 // Get the new insert position for the node we care about. 1393 IncompleteArrayType *NewIP = 1394 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1395 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1396 } 1397 1398 IncompleteArrayType *New = new (*this, TypeAlignment) 1399 IncompleteArrayType(EltTy, Canonical, ASM, EltTypeQuals); 1400 1401 IncompleteArrayTypes.InsertNode(New, InsertPos); 1402 Types.push_back(New); 1403 return QualType(New, 0); 1404} 1405 1406/// getVectorType - Return the unique reference to a vector type of 1407/// the specified element type and size. VectorType must be a built-in type. 1408QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1409 bool IsAltiVec, bool IsPixel) { 1410 BuiltinType *baseType; 1411 1412 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1413 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1414 1415 // Check if we've already instantiated a vector of this type. 1416 llvm::FoldingSetNodeID ID; 1417 VectorType::Profile(ID, vecType, NumElts, Type::Vector, 1418 IsAltiVec, IsPixel); 1419 void *InsertPos = 0; 1420 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1421 return QualType(VTP, 0); 1422 1423 // If the element type isn't canonical, this won't be a canonical type either, 1424 // so fill in the canonical type field. 1425 QualType Canonical; 1426 if (!vecType.isCanonical() || IsAltiVec || IsPixel) { 1427 Canonical = getVectorType(getCanonicalType(vecType), 1428 NumElts, false, false); 1429 1430 // Get the new insert position for the node we care about. 1431 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1432 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1433 } 1434 VectorType *New = new (*this, TypeAlignment) 1435 VectorType(vecType, NumElts, Canonical, IsAltiVec, IsPixel); 1436 VectorTypes.InsertNode(New, InsertPos); 1437 Types.push_back(New); 1438 return QualType(New, 0); 1439} 1440 1441/// getExtVectorType - Return the unique reference to an extended vector type of 1442/// the specified element type and size. VectorType must be a built-in type. 1443QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1444 BuiltinType *baseType; 1445 1446 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1447 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1448 1449 // Check if we've already instantiated a vector of this type. 1450 llvm::FoldingSetNodeID ID; 1451 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, false, false); 1452 void *InsertPos = 0; 1453 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1454 return QualType(VTP, 0); 1455 1456 // If the element type isn't canonical, this won't be a canonical type either, 1457 // so fill in the canonical type field. 1458 QualType Canonical; 1459 if (!vecType.isCanonical()) { 1460 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1461 1462 // Get the new insert position for the node we care about. 1463 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1464 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1465 } 1466 ExtVectorType *New = new (*this, TypeAlignment) 1467 ExtVectorType(vecType, NumElts, Canonical); 1468 VectorTypes.InsertNode(New, InsertPos); 1469 Types.push_back(New); 1470 return QualType(New, 0); 1471} 1472 1473QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1474 Expr *SizeExpr, 1475 SourceLocation AttrLoc) { 1476 llvm::FoldingSetNodeID ID; 1477 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1478 SizeExpr); 1479 1480 void *InsertPos = 0; 1481 DependentSizedExtVectorType *Canon 1482 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1483 DependentSizedExtVectorType *New; 1484 if (Canon) { 1485 // We already have a canonical version of this array type; use it as 1486 // the canonical type for a newly-built type. 1487 New = new (*this, TypeAlignment) 1488 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1489 SizeExpr, AttrLoc); 1490 } else { 1491 QualType CanonVecTy = getCanonicalType(vecType); 1492 if (CanonVecTy == vecType) { 1493 New = new (*this, TypeAlignment) 1494 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1495 AttrLoc); 1496 1497 DependentSizedExtVectorType *CanonCheck 1498 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1499 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1500 (void)CanonCheck; 1501 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1502 } else { 1503 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1504 SourceLocation()); 1505 New = new (*this, TypeAlignment) 1506 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1507 } 1508 } 1509 1510 Types.push_back(New); 1511 return QualType(New, 0); 1512} 1513 1514/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1515/// 1516QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, 1517 const FunctionType::ExtInfo &Info) { 1518 const CallingConv CallConv = Info.getCC(); 1519 // Unique functions, to guarantee there is only one function of a particular 1520 // structure. 1521 llvm::FoldingSetNodeID ID; 1522 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1523 1524 void *InsertPos = 0; 1525 if (FunctionNoProtoType *FT = 1526 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1527 return QualType(FT, 0); 1528 1529 QualType Canonical; 1530 if (!ResultTy.isCanonical() || 1531 getCanonicalCallConv(CallConv) != CallConv) { 1532 Canonical = 1533 getFunctionNoProtoType(getCanonicalType(ResultTy), 1534 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1535 1536 // Get the new insert position for the node we care about. 1537 FunctionNoProtoType *NewIP = 1538 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1539 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1540 } 1541 1542 FunctionNoProtoType *New = new (*this, TypeAlignment) 1543 FunctionNoProtoType(ResultTy, Canonical, Info); 1544 Types.push_back(New); 1545 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1546 return QualType(New, 0); 1547} 1548 1549/// getFunctionType - Return a normal function type with a typed argument 1550/// list. isVariadic indicates whether the argument list includes '...'. 1551QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1552 unsigned NumArgs, bool isVariadic, 1553 unsigned TypeQuals, bool hasExceptionSpec, 1554 bool hasAnyExceptionSpec, unsigned NumExs, 1555 const QualType *ExArray, 1556 const FunctionType::ExtInfo &Info) { 1557 const CallingConv CallConv= Info.getCC(); 1558 // Unique functions, to guarantee there is only one function of a particular 1559 // structure. 1560 llvm::FoldingSetNodeID ID; 1561 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1562 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1563 NumExs, ExArray, Info); 1564 1565 void *InsertPos = 0; 1566 if (FunctionProtoType *FTP = 1567 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1568 return QualType(FTP, 0); 1569 1570 // Determine whether the type being created is already canonical or not. 1571 bool isCanonical = !hasExceptionSpec && ResultTy.isCanonical(); 1572 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1573 if (!ArgArray[i].isCanonicalAsParam()) 1574 isCanonical = false; 1575 1576 // If this type isn't canonical, get the canonical version of it. 1577 // The exception spec is not part of the canonical type. 1578 QualType Canonical; 1579 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1580 llvm::SmallVector<QualType, 16> CanonicalArgs; 1581 CanonicalArgs.reserve(NumArgs); 1582 for (unsigned i = 0; i != NumArgs; ++i) 1583 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1584 1585 Canonical = getFunctionType(getCanonicalType(ResultTy), 1586 CanonicalArgs.data(), NumArgs, 1587 isVariadic, TypeQuals, false, 1588 false, 0, 0, 1589 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1590 1591 // Get the new insert position for the node we care about. 1592 FunctionProtoType *NewIP = 1593 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1594 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1595 } 1596 1597 // FunctionProtoType objects are allocated with extra bytes after them 1598 // for two variable size arrays (for parameter and exception types) at the 1599 // end of them. 1600 FunctionProtoType *FTP = 1601 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1602 NumArgs*sizeof(QualType) + 1603 NumExs*sizeof(QualType), TypeAlignment); 1604 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1605 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1606 ExArray, NumExs, Canonical, Info); 1607 Types.push_back(FTP); 1608 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1609 return QualType(FTP, 0); 1610} 1611 1612#ifndef NDEBUG 1613static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1614 if (!isa<CXXRecordDecl>(D)) return false; 1615 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1616 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1617 return true; 1618 if (RD->getDescribedClassTemplate() && 1619 !isa<ClassTemplateSpecializationDecl>(RD)) 1620 return true; 1621 return false; 1622} 1623#endif 1624 1625/// getInjectedClassNameType - Return the unique reference to the 1626/// injected class name type for the specified templated declaration. 1627QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1628 QualType TST) { 1629 assert(NeedsInjectedClassNameType(Decl)); 1630 if (Decl->TypeForDecl) { 1631 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1632 } else if (CXXRecordDecl *PrevDecl 1633 = cast_or_null<CXXRecordDecl>(Decl->getPreviousDeclaration())) { 1634 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1635 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1636 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1637 } else { 1638 Decl->TypeForDecl = 1639 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 1640 Types.push_back(Decl->TypeForDecl); 1641 } 1642 return QualType(Decl->TypeForDecl, 0); 1643} 1644 1645/// getTypeDeclType - Return the unique reference to the type for the 1646/// specified type declaration. 1647QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) { 1648 assert(Decl && "Passed null for Decl param"); 1649 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 1650 1651 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1652 return getTypedefType(Typedef); 1653 1654 assert(!isa<TemplateTypeParmDecl>(Decl) && 1655 "Template type parameter types are always available."); 1656 1657 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1658 assert(!Record->getPreviousDeclaration() && 1659 "struct/union has previous declaration"); 1660 assert(!NeedsInjectedClassNameType(Record)); 1661 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Record); 1662 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1663 assert(!Enum->getPreviousDeclaration() && 1664 "enum has previous declaration"); 1665 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Enum); 1666 } else if (const UnresolvedUsingTypenameDecl *Using = 1667 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1668 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1669 } else 1670 llvm_unreachable("TypeDecl without a type?"); 1671 1672 Types.push_back(Decl->TypeForDecl); 1673 return QualType(Decl->TypeForDecl, 0); 1674} 1675 1676/// getTypedefType - Return the unique reference to the type for the 1677/// specified typename decl. 1678QualType ASTContext::getTypedefType(const TypedefDecl *Decl) { 1679 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1680 1681 QualType Canonical = getCanonicalType(Decl->getUnderlyingType()); 1682 Decl->TypeForDecl = new(*this, TypeAlignment) 1683 TypedefType(Type::Typedef, Decl, Canonical); 1684 Types.push_back(Decl->TypeForDecl); 1685 return QualType(Decl->TypeForDecl, 0); 1686} 1687 1688/// \brief Retrieve a substitution-result type. 1689QualType 1690ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1691 QualType Replacement) { 1692 assert(Replacement.isCanonical() 1693 && "replacement types must always be canonical"); 1694 1695 llvm::FoldingSetNodeID ID; 1696 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1697 void *InsertPos = 0; 1698 SubstTemplateTypeParmType *SubstParm 1699 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1700 1701 if (!SubstParm) { 1702 SubstParm = new (*this, TypeAlignment) 1703 SubstTemplateTypeParmType(Parm, Replacement); 1704 Types.push_back(SubstParm); 1705 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1706 } 1707 1708 return QualType(SubstParm, 0); 1709} 1710 1711/// \brief Retrieve the template type parameter type for a template 1712/// parameter or parameter pack with the given depth, index, and (optionally) 1713/// name. 1714QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1715 bool ParameterPack, 1716 IdentifierInfo *Name) { 1717 llvm::FoldingSetNodeID ID; 1718 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1719 void *InsertPos = 0; 1720 TemplateTypeParmType *TypeParm 1721 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1722 1723 if (TypeParm) 1724 return QualType(TypeParm, 0); 1725 1726 if (Name) { 1727 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1728 TypeParm = new (*this, TypeAlignment) 1729 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 1730 1731 TemplateTypeParmType *TypeCheck 1732 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1733 assert(!TypeCheck && "Template type parameter canonical type broken"); 1734 (void)TypeCheck; 1735 } else 1736 TypeParm = new (*this, TypeAlignment) 1737 TemplateTypeParmType(Depth, Index, ParameterPack); 1738 1739 Types.push_back(TypeParm); 1740 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1741 1742 return QualType(TypeParm, 0); 1743} 1744 1745TypeSourceInfo * 1746ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 1747 SourceLocation NameLoc, 1748 const TemplateArgumentListInfo &Args, 1749 QualType CanonType) { 1750 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 1751 1752 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 1753 TemplateSpecializationTypeLoc TL 1754 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 1755 TL.setTemplateNameLoc(NameLoc); 1756 TL.setLAngleLoc(Args.getLAngleLoc()); 1757 TL.setRAngleLoc(Args.getRAngleLoc()); 1758 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 1759 TL.setArgLocInfo(i, Args[i].getLocInfo()); 1760 return DI; 1761} 1762 1763QualType 1764ASTContext::getTemplateSpecializationType(TemplateName Template, 1765 const TemplateArgumentListInfo &Args, 1766 QualType Canon, 1767 bool IsCurrentInstantiation) { 1768 unsigned NumArgs = Args.size(); 1769 1770 llvm::SmallVector<TemplateArgument, 4> ArgVec; 1771 ArgVec.reserve(NumArgs); 1772 for (unsigned i = 0; i != NumArgs; ++i) 1773 ArgVec.push_back(Args[i].getArgument()); 1774 1775 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 1776 Canon, IsCurrentInstantiation); 1777} 1778 1779QualType 1780ASTContext::getTemplateSpecializationType(TemplateName Template, 1781 const TemplateArgument *Args, 1782 unsigned NumArgs, 1783 QualType Canon, 1784 bool IsCurrentInstantiation) { 1785 if (!Canon.isNull()) 1786 Canon = getCanonicalType(Canon); 1787 else { 1788 assert(!IsCurrentInstantiation && 1789 "current-instantiation specializations should always " 1790 "have a canonical type"); 1791 1792 // Build the canonical template specialization type. 1793 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 1794 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 1795 CanonArgs.reserve(NumArgs); 1796 for (unsigned I = 0; I != NumArgs; ++I) 1797 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 1798 1799 // Determine whether this canonical template specialization type already 1800 // exists. 1801 llvm::FoldingSetNodeID ID; 1802 TemplateSpecializationType::Profile(ID, CanonTemplate, false, 1803 CanonArgs.data(), NumArgs, *this); 1804 1805 void *InsertPos = 0; 1806 TemplateSpecializationType *Spec 1807 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1808 1809 if (!Spec) { 1810 // Allocate a new canonical template specialization type. 1811 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1812 sizeof(TemplateArgument) * NumArgs), 1813 TypeAlignment); 1814 Spec = new (Mem) TemplateSpecializationType(*this, CanonTemplate, false, 1815 CanonArgs.data(), NumArgs, 1816 Canon); 1817 Types.push_back(Spec); 1818 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1819 } 1820 1821 if (Canon.isNull()) 1822 Canon = QualType(Spec, 0); 1823 assert(Canon->isDependentType() && 1824 "Non-dependent template-id type must have a canonical type"); 1825 } 1826 1827 // Allocate the (non-canonical) template specialization type, but don't 1828 // try to unique it: these types typically have location information that 1829 // we don't unique and don't want to lose. 1830 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1831 sizeof(TemplateArgument) * NumArgs), 1832 TypeAlignment); 1833 TemplateSpecializationType *Spec 1834 = new (Mem) TemplateSpecializationType(*this, Template, 1835 IsCurrentInstantiation, 1836 Args, NumArgs, 1837 Canon); 1838 1839 Types.push_back(Spec); 1840 return QualType(Spec, 0); 1841} 1842 1843QualType 1844ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 1845 NestedNameSpecifier *NNS, 1846 QualType NamedType) { 1847 llvm::FoldingSetNodeID ID; 1848 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 1849 1850 void *InsertPos = 0; 1851 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1852 if (T) 1853 return QualType(T, 0); 1854 1855 QualType Canon = NamedType; 1856 if (!Canon.isCanonical()) { 1857 Canon = getCanonicalType(NamedType); 1858 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1859 assert(!CheckT && "Elaborated canonical type broken"); 1860 (void)CheckT; 1861 } 1862 1863 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 1864 Types.push_back(T); 1865 ElaboratedTypes.InsertNode(T, InsertPos); 1866 return QualType(T, 0); 1867} 1868 1869QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 1870 NestedNameSpecifier *NNS, 1871 const IdentifierInfo *Name, 1872 QualType Canon) { 1873 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1874 1875 if (Canon.isNull()) { 1876 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1877 ElaboratedTypeKeyword CanonKeyword = Keyword; 1878 if (Keyword == ETK_None) 1879 CanonKeyword = ETK_Typename; 1880 1881 if (CanonNNS != NNS || CanonKeyword != Keyword) 1882 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 1883 } 1884 1885 llvm::FoldingSetNodeID ID; 1886 DependentNameType::Profile(ID, Keyword, NNS, Name); 1887 1888 void *InsertPos = 0; 1889 DependentNameType *T 1890 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1891 if (T) 1892 return QualType(T, 0); 1893 1894 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 1895 Types.push_back(T); 1896 DependentNameTypes.InsertNode(T, InsertPos); 1897 return QualType(T, 0); 1898} 1899 1900QualType 1901ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 1902 NestedNameSpecifier *NNS, 1903 const TemplateSpecializationType *TemplateId, 1904 QualType Canon) { 1905 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1906 1907 llvm::FoldingSetNodeID ID; 1908 DependentNameType::Profile(ID, Keyword, NNS, TemplateId); 1909 1910 void *InsertPos = 0; 1911 DependentNameType *T 1912 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1913 if (T) 1914 return QualType(T, 0); 1915 1916 if (Canon.isNull()) { 1917 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1918 QualType CanonType = getCanonicalType(QualType(TemplateId, 0)); 1919 ElaboratedTypeKeyword CanonKeyword = Keyword; 1920 if (Keyword == ETK_None) 1921 CanonKeyword = ETK_Typename; 1922 if (CanonNNS != NNS || CanonKeyword != Keyword || 1923 CanonType != QualType(TemplateId, 0)) { 1924 const TemplateSpecializationType *CanonTemplateId 1925 = CanonType->getAs<TemplateSpecializationType>(); 1926 assert(CanonTemplateId && 1927 "Canonical type must also be a template specialization type"); 1928 Canon = getDependentNameType(CanonKeyword, CanonNNS, CanonTemplateId); 1929 } 1930 1931 DependentNameType *CheckT 1932 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1933 assert(!CheckT && "Typename canonical type is broken"); (void)CheckT; 1934 } 1935 1936 T = new (*this) DependentNameType(Keyword, NNS, TemplateId, Canon); 1937 Types.push_back(T); 1938 DependentNameTypes.InsertNode(T, InsertPos); 1939 return QualType(T, 0); 1940} 1941 1942/// CmpProtocolNames - Comparison predicate for sorting protocols 1943/// alphabetically. 1944static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 1945 const ObjCProtocolDecl *RHS) { 1946 return LHS->getDeclName() < RHS->getDeclName(); 1947} 1948 1949static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 1950 unsigned NumProtocols) { 1951 if (NumProtocols == 0) return true; 1952 1953 for (unsigned i = 1; i != NumProtocols; ++i) 1954 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 1955 return false; 1956 return true; 1957} 1958 1959static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 1960 unsigned &NumProtocols) { 1961 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 1962 1963 // Sort protocols, keyed by name. 1964 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 1965 1966 // Remove duplicates. 1967 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 1968 NumProtocols = ProtocolsEnd-Protocols; 1969} 1970 1971QualType ASTContext::getObjCObjectType(QualType BaseType, 1972 ObjCProtocolDecl * const *Protocols, 1973 unsigned NumProtocols) { 1974 // If the base type is an interface and there aren't any protocols 1975 // to add, then the interface type will do just fine. 1976 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 1977 return BaseType; 1978 1979 // Look in the folding set for an existing type. 1980 llvm::FoldingSetNodeID ID; 1981 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 1982 void *InsertPos = 0; 1983 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 1984 return QualType(QT, 0); 1985 1986 // Build the canonical type, which has the canonical base type and 1987 // a sorted-and-uniqued list of protocols. 1988 QualType Canonical; 1989 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 1990 if (!ProtocolsSorted || !BaseType.isCanonical()) { 1991 if (!ProtocolsSorted) { 1992 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 1993 Protocols + NumProtocols); 1994 unsigned UniqueCount = NumProtocols; 1995 1996 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 1997 Canonical = getObjCObjectType(getCanonicalType(BaseType), 1998 &Sorted[0], UniqueCount); 1999 } else { 2000 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2001 Protocols, NumProtocols); 2002 } 2003 2004 // Regenerate InsertPos. 2005 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2006 } 2007 2008 unsigned Size = sizeof(ObjCObjectTypeImpl); 2009 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2010 void *Mem = Allocate(Size, TypeAlignment); 2011 ObjCObjectTypeImpl *T = 2012 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2013 2014 Types.push_back(T); 2015 ObjCObjectTypes.InsertNode(T, InsertPos); 2016 return QualType(T, 0); 2017} 2018 2019/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2020/// the given object type. 2021QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) { 2022 llvm::FoldingSetNodeID ID; 2023 ObjCObjectPointerType::Profile(ID, ObjectT); 2024 2025 void *InsertPos = 0; 2026 if (ObjCObjectPointerType *QT = 2027 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2028 return QualType(QT, 0); 2029 2030 // Find the canonical object type. 2031 QualType Canonical; 2032 if (!ObjectT.isCanonical()) { 2033 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2034 2035 // Regenerate InsertPos. 2036 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2037 } 2038 2039 // No match. 2040 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2041 ObjCObjectPointerType *QType = 2042 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2043 2044 Types.push_back(QType); 2045 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2046 return QualType(QType, 0); 2047} 2048 2049/// getObjCInterfaceType - Return the unique reference to the type for the 2050/// specified ObjC interface decl. The list of protocols is optional. 2051QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) { 2052 if (Decl->TypeForDecl) 2053 return QualType(Decl->TypeForDecl, 0); 2054 2055 // FIXME: redeclarations? 2056 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2057 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2058 Decl->TypeForDecl = T; 2059 Types.push_back(T); 2060 return QualType(T, 0); 2061} 2062 2063/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2064/// TypeOfExprType AST's (since expression's are never shared). For example, 2065/// multiple declarations that refer to "typeof(x)" all contain different 2066/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2067/// on canonical type's (which are always unique). 2068QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2069 TypeOfExprType *toe; 2070 if (tofExpr->isTypeDependent()) { 2071 llvm::FoldingSetNodeID ID; 2072 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2073 2074 void *InsertPos = 0; 2075 DependentTypeOfExprType *Canon 2076 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2077 if (Canon) { 2078 // We already have a "canonical" version of an identical, dependent 2079 // typeof(expr) type. Use that as our canonical type. 2080 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2081 QualType((TypeOfExprType*)Canon, 0)); 2082 } 2083 else { 2084 // Build a new, canonical typeof(expr) type. 2085 Canon 2086 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2087 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2088 toe = Canon; 2089 } 2090 } else { 2091 QualType Canonical = getCanonicalType(tofExpr->getType()); 2092 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2093 } 2094 Types.push_back(toe); 2095 return QualType(toe, 0); 2096} 2097 2098/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2099/// TypeOfType AST's. The only motivation to unique these nodes would be 2100/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2101/// an issue. This doesn't effect the type checker, since it operates 2102/// on canonical type's (which are always unique). 2103QualType ASTContext::getTypeOfType(QualType tofType) { 2104 QualType Canonical = getCanonicalType(tofType); 2105 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2106 Types.push_back(tot); 2107 return QualType(tot, 0); 2108} 2109 2110/// getDecltypeForExpr - Given an expr, will return the decltype for that 2111/// expression, according to the rules in C++0x [dcl.type.simple]p4 2112static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2113 if (e->isTypeDependent()) 2114 return Context.DependentTy; 2115 2116 // If e is an id expression or a class member access, decltype(e) is defined 2117 // as the type of the entity named by e. 2118 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2119 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2120 return VD->getType(); 2121 } 2122 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2123 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2124 return FD->getType(); 2125 } 2126 // If e is a function call or an invocation of an overloaded operator, 2127 // (parentheses around e are ignored), decltype(e) is defined as the 2128 // return type of that function. 2129 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2130 return CE->getCallReturnType(); 2131 2132 QualType T = e->getType(); 2133 2134 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2135 // defined as T&, otherwise decltype(e) is defined as T. 2136 if (e->isLvalue(Context) == Expr::LV_Valid) 2137 T = Context.getLValueReferenceType(T); 2138 2139 return T; 2140} 2141 2142/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2143/// DecltypeType AST's. The only motivation to unique these nodes would be 2144/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2145/// an issue. This doesn't effect the type checker, since it operates 2146/// on canonical type's (which are always unique). 2147QualType ASTContext::getDecltypeType(Expr *e) { 2148 DecltypeType *dt; 2149 if (e->isTypeDependent()) { 2150 llvm::FoldingSetNodeID ID; 2151 DependentDecltypeType::Profile(ID, *this, e); 2152 2153 void *InsertPos = 0; 2154 DependentDecltypeType *Canon 2155 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2156 if (Canon) { 2157 // We already have a "canonical" version of an equivalent, dependent 2158 // decltype type. Use that as our canonical type. 2159 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2160 QualType((DecltypeType*)Canon, 0)); 2161 } 2162 else { 2163 // Build a new, canonical typeof(expr) type. 2164 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2165 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2166 dt = Canon; 2167 } 2168 } else { 2169 QualType T = getDecltypeForExpr(e, *this); 2170 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2171 } 2172 Types.push_back(dt); 2173 return QualType(dt, 0); 2174} 2175 2176/// getTagDeclType - Return the unique reference to the type for the 2177/// specified TagDecl (struct/union/class/enum) decl. 2178QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2179 assert (Decl); 2180 // FIXME: What is the design on getTagDeclType when it requires casting 2181 // away const? mutable? 2182 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2183} 2184 2185/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2186/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2187/// needs to agree with the definition in <stddef.h>. 2188CanQualType ASTContext::getSizeType() const { 2189 return getFromTargetType(Target.getSizeType()); 2190} 2191 2192/// getSignedWCharType - Return the type of "signed wchar_t". 2193/// Used when in C++, as a GCC extension. 2194QualType ASTContext::getSignedWCharType() const { 2195 // FIXME: derive from "Target" ? 2196 return WCharTy; 2197} 2198 2199/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2200/// Used when in C++, as a GCC extension. 2201QualType ASTContext::getUnsignedWCharType() const { 2202 // FIXME: derive from "Target" ? 2203 return UnsignedIntTy; 2204} 2205 2206/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2207/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2208QualType ASTContext::getPointerDiffType() const { 2209 return getFromTargetType(Target.getPtrDiffType(0)); 2210} 2211 2212//===----------------------------------------------------------------------===// 2213// Type Operators 2214//===----------------------------------------------------------------------===// 2215 2216CanQualType ASTContext::getCanonicalParamType(QualType T) { 2217 // Push qualifiers into arrays, and then discard any remaining 2218 // qualifiers. 2219 T = getCanonicalType(T); 2220 const Type *Ty = T.getTypePtr(); 2221 2222 QualType Result; 2223 if (isa<ArrayType>(Ty)) { 2224 Result = getArrayDecayedType(QualType(Ty,0)); 2225 } else if (isa<FunctionType>(Ty)) { 2226 Result = getPointerType(QualType(Ty, 0)); 2227 } else { 2228 Result = QualType(Ty, 0); 2229 } 2230 2231 return CanQualType::CreateUnsafe(Result); 2232} 2233 2234/// getCanonicalType - Return the canonical (structural) type corresponding to 2235/// the specified potentially non-canonical type. The non-canonical version 2236/// of a type may have many "decorated" versions of types. Decorators can 2237/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2238/// to be free of any of these, allowing two canonical types to be compared 2239/// for exact equality with a simple pointer comparison. 2240CanQualType ASTContext::getCanonicalType(QualType T) { 2241 QualifierCollector Quals; 2242 const Type *Ptr = Quals.strip(T); 2243 QualType CanType = Ptr->getCanonicalTypeInternal(); 2244 2245 // The canonical internal type will be the canonical type *except* 2246 // that we push type qualifiers down through array types. 2247 2248 // If there are no new qualifiers to push down, stop here. 2249 if (!Quals.hasQualifiers()) 2250 return CanQualType::CreateUnsafe(CanType); 2251 2252 // If the type qualifiers are on an array type, get the canonical 2253 // type of the array with the qualifiers applied to the element 2254 // type. 2255 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2256 if (!AT) 2257 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2258 2259 // Get the canonical version of the element with the extra qualifiers on it. 2260 // This can recursively sink qualifiers through multiple levels of arrays. 2261 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2262 NewEltTy = getCanonicalType(NewEltTy); 2263 2264 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2265 return CanQualType::CreateUnsafe( 2266 getConstantArrayType(NewEltTy, CAT->getSize(), 2267 CAT->getSizeModifier(), 2268 CAT->getIndexTypeCVRQualifiers())); 2269 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2270 return CanQualType::CreateUnsafe( 2271 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2272 IAT->getIndexTypeCVRQualifiers())); 2273 2274 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2275 return CanQualType::CreateUnsafe( 2276 getDependentSizedArrayType(NewEltTy, 2277 DSAT->getSizeExpr() ? 2278 DSAT->getSizeExpr()->Retain() : 0, 2279 DSAT->getSizeModifier(), 2280 DSAT->getIndexTypeCVRQualifiers(), 2281 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2282 2283 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2284 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2285 VAT->getSizeExpr() ? 2286 VAT->getSizeExpr()->Retain() : 0, 2287 VAT->getSizeModifier(), 2288 VAT->getIndexTypeCVRQualifiers(), 2289 VAT->getBracketsRange())); 2290} 2291 2292QualType ASTContext::getUnqualifiedArrayType(QualType T, 2293 Qualifiers &Quals) { 2294 Quals = T.getQualifiers(); 2295 const ArrayType *AT = getAsArrayType(T); 2296 if (!AT) { 2297 return T.getUnqualifiedType(); 2298 } 2299 2300 QualType Elt = AT->getElementType(); 2301 QualType UnqualElt = getUnqualifiedArrayType(Elt, Quals); 2302 if (Elt == UnqualElt) 2303 return T; 2304 2305 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 2306 return getConstantArrayType(UnqualElt, CAT->getSize(), 2307 CAT->getSizeModifier(), 0); 2308 } 2309 2310 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 2311 return getIncompleteArrayType(UnqualElt, IAT->getSizeModifier(), 0); 2312 } 2313 2314 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 2315 return getVariableArrayType(UnqualElt, 2316 VAT->getSizeExpr() ? 2317 VAT->getSizeExpr()->Retain() : 0, 2318 VAT->getSizeModifier(), 2319 VAT->getIndexTypeCVRQualifiers(), 2320 VAT->getBracketsRange()); 2321 } 2322 2323 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 2324 return getDependentSizedArrayType(UnqualElt, DSAT->getSizeExpr()->Retain(), 2325 DSAT->getSizeModifier(), 0, 2326 SourceRange()); 2327} 2328 2329DeclarationName ASTContext::getNameForTemplate(TemplateName Name) { 2330 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2331 return TD->getDeclName(); 2332 2333 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2334 if (DTN->isIdentifier()) { 2335 return DeclarationNames.getIdentifier(DTN->getIdentifier()); 2336 } else { 2337 return DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2338 } 2339 } 2340 2341 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2342 assert(Storage); 2343 return (*Storage->begin())->getDeclName(); 2344} 2345 2346TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2347 // If this template name refers to a template, the canonical 2348 // template name merely stores the template itself. 2349 if (TemplateDecl *Template = Name.getAsTemplateDecl()) 2350 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2351 2352 assert(!Name.getAsOverloadedTemplate()); 2353 2354 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2355 assert(DTN && "Non-dependent template names must refer to template decls."); 2356 return DTN->CanonicalTemplateName; 2357} 2358 2359bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2360 X = getCanonicalTemplateName(X); 2361 Y = getCanonicalTemplateName(Y); 2362 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2363} 2364 2365TemplateArgument 2366ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2367 switch (Arg.getKind()) { 2368 case TemplateArgument::Null: 2369 return Arg; 2370 2371 case TemplateArgument::Expression: 2372 return Arg; 2373 2374 case TemplateArgument::Declaration: 2375 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2376 2377 case TemplateArgument::Template: 2378 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2379 2380 case TemplateArgument::Integral: 2381 return TemplateArgument(*Arg.getAsIntegral(), 2382 getCanonicalType(Arg.getIntegralType())); 2383 2384 case TemplateArgument::Type: 2385 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2386 2387 case TemplateArgument::Pack: { 2388 // FIXME: Allocate in ASTContext 2389 TemplateArgument *CanonArgs = new TemplateArgument[Arg.pack_size()]; 2390 unsigned Idx = 0; 2391 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2392 AEnd = Arg.pack_end(); 2393 A != AEnd; (void)++A, ++Idx) 2394 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2395 2396 TemplateArgument Result; 2397 Result.setArgumentPack(CanonArgs, Arg.pack_size(), false); 2398 return Result; 2399 } 2400 } 2401 2402 // Silence GCC warning 2403 assert(false && "Unhandled template argument kind"); 2404 return TemplateArgument(); 2405} 2406 2407NestedNameSpecifier * 2408ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2409 if (!NNS) 2410 return 0; 2411 2412 switch (NNS->getKind()) { 2413 case NestedNameSpecifier::Identifier: 2414 // Canonicalize the prefix but keep the identifier the same. 2415 return NestedNameSpecifier::Create(*this, 2416 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2417 NNS->getAsIdentifier()); 2418 2419 case NestedNameSpecifier::Namespace: 2420 // A namespace is canonical; build a nested-name-specifier with 2421 // this namespace and no prefix. 2422 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2423 2424 case NestedNameSpecifier::TypeSpec: 2425 case NestedNameSpecifier::TypeSpecWithTemplate: { 2426 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2427 return NestedNameSpecifier::Create(*this, 0, 2428 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2429 T.getTypePtr()); 2430 } 2431 2432 case NestedNameSpecifier::Global: 2433 // The global specifier is canonical and unique. 2434 return NNS; 2435 } 2436 2437 // Required to silence a GCC warning 2438 return 0; 2439} 2440 2441 2442const ArrayType *ASTContext::getAsArrayType(QualType T) { 2443 // Handle the non-qualified case efficiently. 2444 if (!T.hasLocalQualifiers()) { 2445 // Handle the common positive case fast. 2446 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2447 return AT; 2448 } 2449 2450 // Handle the common negative case fast. 2451 QualType CType = T->getCanonicalTypeInternal(); 2452 if (!isa<ArrayType>(CType)) 2453 return 0; 2454 2455 // Apply any qualifiers from the array type to the element type. This 2456 // implements C99 6.7.3p8: "If the specification of an array type includes 2457 // any type qualifiers, the element type is so qualified, not the array type." 2458 2459 // If we get here, we either have type qualifiers on the type, or we have 2460 // sugar such as a typedef in the way. If we have type qualifiers on the type 2461 // we must propagate them down into the element type. 2462 2463 QualifierCollector Qs; 2464 const Type *Ty = Qs.strip(T.getDesugaredType()); 2465 2466 // If we have a simple case, just return now. 2467 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2468 if (ATy == 0 || Qs.empty()) 2469 return ATy; 2470 2471 // Otherwise, we have an array and we have qualifiers on it. Push the 2472 // qualifiers into the array element type and return a new array type. 2473 // Get the canonical version of the element with the extra qualifiers on it. 2474 // This can recursively sink qualifiers through multiple levels of arrays. 2475 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2476 2477 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2478 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2479 CAT->getSizeModifier(), 2480 CAT->getIndexTypeCVRQualifiers())); 2481 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2482 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2483 IAT->getSizeModifier(), 2484 IAT->getIndexTypeCVRQualifiers())); 2485 2486 if (const DependentSizedArrayType *DSAT 2487 = dyn_cast<DependentSizedArrayType>(ATy)) 2488 return cast<ArrayType>( 2489 getDependentSizedArrayType(NewEltTy, 2490 DSAT->getSizeExpr() ? 2491 DSAT->getSizeExpr()->Retain() : 0, 2492 DSAT->getSizeModifier(), 2493 DSAT->getIndexTypeCVRQualifiers(), 2494 DSAT->getBracketsRange())); 2495 2496 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2497 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2498 VAT->getSizeExpr() ? 2499 VAT->getSizeExpr()->Retain() : 0, 2500 VAT->getSizeModifier(), 2501 VAT->getIndexTypeCVRQualifiers(), 2502 VAT->getBracketsRange())); 2503} 2504 2505 2506/// getArrayDecayedType - Return the properly qualified result of decaying the 2507/// specified array type to a pointer. This operation is non-trivial when 2508/// handling typedefs etc. The canonical type of "T" must be an array type, 2509/// this returns a pointer to a properly qualified element of the array. 2510/// 2511/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2512QualType ASTContext::getArrayDecayedType(QualType Ty) { 2513 // Get the element type with 'getAsArrayType' so that we don't lose any 2514 // typedefs in the element type of the array. This also handles propagation 2515 // of type qualifiers from the array type into the element type if present 2516 // (C99 6.7.3p8). 2517 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2518 assert(PrettyArrayType && "Not an array type!"); 2519 2520 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2521 2522 // int x[restrict 4] -> int *restrict 2523 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2524} 2525 2526QualType ASTContext::getBaseElementType(QualType QT) { 2527 QualifierCollector Qs; 2528 while (const ArrayType *AT = getAsArrayType(QualType(Qs.strip(QT), 0))) 2529 QT = AT->getElementType(); 2530 return Qs.apply(QT); 2531} 2532 2533QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2534 QualType ElemTy = AT->getElementType(); 2535 2536 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2537 return getBaseElementType(AT); 2538 2539 return ElemTy; 2540} 2541 2542/// getConstantArrayElementCount - Returns number of constant array elements. 2543uint64_t 2544ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2545 uint64_t ElementCount = 1; 2546 do { 2547 ElementCount *= CA->getSize().getZExtValue(); 2548 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2549 } while (CA); 2550 return ElementCount; 2551} 2552 2553/// getFloatingRank - Return a relative rank for floating point types. 2554/// This routine will assert if passed a built-in type that isn't a float. 2555static FloatingRank getFloatingRank(QualType T) { 2556 if (const ComplexType *CT = T->getAs<ComplexType>()) 2557 return getFloatingRank(CT->getElementType()); 2558 2559 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2560 switch (T->getAs<BuiltinType>()->getKind()) { 2561 default: assert(0 && "getFloatingRank(): not a floating type"); 2562 case BuiltinType::Float: return FloatRank; 2563 case BuiltinType::Double: return DoubleRank; 2564 case BuiltinType::LongDouble: return LongDoubleRank; 2565 } 2566} 2567 2568/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2569/// point or a complex type (based on typeDomain/typeSize). 2570/// 'typeDomain' is a real floating point or complex type. 2571/// 'typeSize' is a real floating point or complex type. 2572QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2573 QualType Domain) const { 2574 FloatingRank EltRank = getFloatingRank(Size); 2575 if (Domain->isComplexType()) { 2576 switch (EltRank) { 2577 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2578 case FloatRank: return FloatComplexTy; 2579 case DoubleRank: return DoubleComplexTy; 2580 case LongDoubleRank: return LongDoubleComplexTy; 2581 } 2582 } 2583 2584 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2585 switch (EltRank) { 2586 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2587 case FloatRank: return FloatTy; 2588 case DoubleRank: return DoubleTy; 2589 case LongDoubleRank: return LongDoubleTy; 2590 } 2591} 2592 2593/// getFloatingTypeOrder - Compare the rank of the two specified floating 2594/// point types, ignoring the domain of the type (i.e. 'double' == 2595/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2596/// LHS < RHS, return -1. 2597int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2598 FloatingRank LHSR = getFloatingRank(LHS); 2599 FloatingRank RHSR = getFloatingRank(RHS); 2600 2601 if (LHSR == RHSR) 2602 return 0; 2603 if (LHSR > RHSR) 2604 return 1; 2605 return -1; 2606} 2607 2608/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2609/// routine will assert if passed a built-in type that isn't an integer or enum, 2610/// or if it is not canonicalized. 2611unsigned ASTContext::getIntegerRank(Type *T) { 2612 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2613 if (EnumType* ET = dyn_cast<EnumType>(T)) 2614 T = ET->getDecl()->getPromotionType().getTypePtr(); 2615 2616 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2617 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2618 2619 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2620 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2621 2622 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2623 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2624 2625 switch (cast<BuiltinType>(T)->getKind()) { 2626 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2627 case BuiltinType::Bool: 2628 return 1 + (getIntWidth(BoolTy) << 3); 2629 case BuiltinType::Char_S: 2630 case BuiltinType::Char_U: 2631 case BuiltinType::SChar: 2632 case BuiltinType::UChar: 2633 return 2 + (getIntWidth(CharTy) << 3); 2634 case BuiltinType::Short: 2635 case BuiltinType::UShort: 2636 return 3 + (getIntWidth(ShortTy) << 3); 2637 case BuiltinType::Int: 2638 case BuiltinType::UInt: 2639 return 4 + (getIntWidth(IntTy) << 3); 2640 case BuiltinType::Long: 2641 case BuiltinType::ULong: 2642 return 5 + (getIntWidth(LongTy) << 3); 2643 case BuiltinType::LongLong: 2644 case BuiltinType::ULongLong: 2645 return 6 + (getIntWidth(LongLongTy) << 3); 2646 case BuiltinType::Int128: 2647 case BuiltinType::UInt128: 2648 return 7 + (getIntWidth(Int128Ty) << 3); 2649 } 2650} 2651 2652/// \brief Whether this is a promotable bitfield reference according 2653/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 2654/// 2655/// \returns the type this bit-field will promote to, or NULL if no 2656/// promotion occurs. 2657QualType ASTContext::isPromotableBitField(Expr *E) { 2658 if (E->isTypeDependent() || E->isValueDependent()) 2659 return QualType(); 2660 2661 FieldDecl *Field = E->getBitField(); 2662 if (!Field) 2663 return QualType(); 2664 2665 QualType FT = Field->getType(); 2666 2667 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 2668 uint64_t BitWidth = BitWidthAP.getZExtValue(); 2669 uint64_t IntSize = getTypeSize(IntTy); 2670 // GCC extension compatibility: if the bit-field size is less than or equal 2671 // to the size of int, it gets promoted no matter what its type is. 2672 // For instance, unsigned long bf : 4 gets promoted to signed int. 2673 if (BitWidth < IntSize) 2674 return IntTy; 2675 2676 if (BitWidth == IntSize) 2677 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 2678 2679 // Types bigger than int are not subject to promotions, and therefore act 2680 // like the base type. 2681 // FIXME: This doesn't quite match what gcc does, but what gcc does here 2682 // is ridiculous. 2683 return QualType(); 2684} 2685 2686/// getPromotedIntegerType - Returns the type that Promotable will 2687/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 2688/// integer type. 2689QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 2690 assert(!Promotable.isNull()); 2691 assert(Promotable->isPromotableIntegerType()); 2692 if (const EnumType *ET = Promotable->getAs<EnumType>()) 2693 return ET->getDecl()->getPromotionType(); 2694 if (Promotable->isSignedIntegerType()) 2695 return IntTy; 2696 uint64_t PromotableSize = getTypeSize(Promotable); 2697 uint64_t IntSize = getTypeSize(IntTy); 2698 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 2699 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 2700} 2701 2702/// getIntegerTypeOrder - Returns the highest ranked integer type: 2703/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2704/// LHS < RHS, return -1. 2705int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2706 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2707 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2708 if (LHSC == RHSC) return 0; 2709 2710 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2711 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2712 2713 unsigned LHSRank = getIntegerRank(LHSC); 2714 unsigned RHSRank = getIntegerRank(RHSC); 2715 2716 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2717 if (LHSRank == RHSRank) return 0; 2718 return LHSRank > RHSRank ? 1 : -1; 2719 } 2720 2721 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2722 if (LHSUnsigned) { 2723 // If the unsigned [LHS] type is larger, return it. 2724 if (LHSRank >= RHSRank) 2725 return 1; 2726 2727 // If the signed type can represent all values of the unsigned type, it 2728 // wins. Because we are dealing with 2's complement and types that are 2729 // powers of two larger than each other, this is always safe. 2730 return -1; 2731 } 2732 2733 // If the unsigned [RHS] type is larger, return it. 2734 if (RHSRank >= LHSRank) 2735 return -1; 2736 2737 // If the signed type can represent all values of the unsigned type, it 2738 // wins. Because we are dealing with 2's complement and types that are 2739 // powers of two larger than each other, this is always safe. 2740 return 1; 2741} 2742 2743static RecordDecl * 2744CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 2745 SourceLocation L, IdentifierInfo *Id) { 2746 if (Ctx.getLangOptions().CPlusPlus) 2747 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 2748 else 2749 return RecordDecl::Create(Ctx, TK, DC, L, Id); 2750} 2751 2752// getCFConstantStringType - Return the type used for constant CFStrings. 2753QualType ASTContext::getCFConstantStringType() { 2754 if (!CFConstantStringTypeDecl) { 2755 CFConstantStringTypeDecl = 2756 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2757 &Idents.get("NSConstantString")); 2758 CFConstantStringTypeDecl->startDefinition(); 2759 2760 QualType FieldTypes[4]; 2761 2762 // const int *isa; 2763 FieldTypes[0] = getPointerType(IntTy.withConst()); 2764 // int flags; 2765 FieldTypes[1] = IntTy; 2766 // const char *str; 2767 FieldTypes[2] = getPointerType(CharTy.withConst()); 2768 // long length; 2769 FieldTypes[3] = LongTy; 2770 2771 // Create fields 2772 for (unsigned i = 0; i < 4; ++i) { 2773 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2774 SourceLocation(), 0, 2775 FieldTypes[i], /*TInfo=*/0, 2776 /*BitWidth=*/0, 2777 /*Mutable=*/false); 2778 Field->setAccess(AS_public); 2779 CFConstantStringTypeDecl->addDecl(Field); 2780 } 2781 2782 CFConstantStringTypeDecl->completeDefinition(); 2783 } 2784 2785 return getTagDeclType(CFConstantStringTypeDecl); 2786} 2787 2788void ASTContext::setCFConstantStringType(QualType T) { 2789 const RecordType *Rec = T->getAs<RecordType>(); 2790 assert(Rec && "Invalid CFConstantStringType"); 2791 CFConstantStringTypeDecl = Rec->getDecl(); 2792} 2793 2794// getNSConstantStringType - Return the type used for constant NSStrings. 2795QualType ASTContext::getNSConstantStringType() { 2796 if (!NSConstantStringTypeDecl) { 2797 NSConstantStringTypeDecl = 2798 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2799 &Idents.get("__builtin_NSString")); 2800 NSConstantStringTypeDecl->startDefinition(); 2801 2802 QualType FieldTypes[3]; 2803 2804 // const int *isa; 2805 FieldTypes[0] = getPointerType(IntTy.withConst()); 2806 // const char *str; 2807 FieldTypes[1] = getPointerType(CharTy.withConst()); 2808 // unsigned int length; 2809 FieldTypes[2] = UnsignedIntTy; 2810 2811 // Create fields 2812 for (unsigned i = 0; i < 3; ++i) { 2813 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 2814 SourceLocation(), 0, 2815 FieldTypes[i], /*TInfo=*/0, 2816 /*BitWidth=*/0, 2817 /*Mutable=*/false); 2818 Field->setAccess(AS_public); 2819 NSConstantStringTypeDecl->addDecl(Field); 2820 } 2821 2822 NSConstantStringTypeDecl->completeDefinition(); 2823 } 2824 2825 return getTagDeclType(NSConstantStringTypeDecl); 2826} 2827 2828void ASTContext::setNSConstantStringType(QualType T) { 2829 const RecordType *Rec = T->getAs<RecordType>(); 2830 assert(Rec && "Invalid NSConstantStringType"); 2831 NSConstantStringTypeDecl = Rec->getDecl(); 2832} 2833 2834QualType ASTContext::getObjCFastEnumerationStateType() { 2835 if (!ObjCFastEnumerationStateTypeDecl) { 2836 ObjCFastEnumerationStateTypeDecl = 2837 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2838 &Idents.get("__objcFastEnumerationState")); 2839 ObjCFastEnumerationStateTypeDecl->startDefinition(); 2840 2841 QualType FieldTypes[] = { 2842 UnsignedLongTy, 2843 getPointerType(ObjCIdTypedefType), 2844 getPointerType(UnsignedLongTy), 2845 getConstantArrayType(UnsignedLongTy, 2846 llvm::APInt(32, 5), ArrayType::Normal, 0) 2847 }; 2848 2849 for (size_t i = 0; i < 4; ++i) { 2850 FieldDecl *Field = FieldDecl::Create(*this, 2851 ObjCFastEnumerationStateTypeDecl, 2852 SourceLocation(), 0, 2853 FieldTypes[i], /*TInfo=*/0, 2854 /*BitWidth=*/0, 2855 /*Mutable=*/false); 2856 Field->setAccess(AS_public); 2857 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 2858 } 2859 if (getLangOptions().CPlusPlus) 2860 if (CXXRecordDecl *CXXRD = 2861 dyn_cast<CXXRecordDecl>(ObjCFastEnumerationStateTypeDecl)) 2862 CXXRD->setEmpty(false); 2863 2864 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 2865 } 2866 2867 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 2868} 2869 2870QualType ASTContext::getBlockDescriptorType() { 2871 if (BlockDescriptorType) 2872 return getTagDeclType(BlockDescriptorType); 2873 2874 RecordDecl *T; 2875 // FIXME: Needs the FlagAppleBlock bit. 2876 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2877 &Idents.get("__block_descriptor")); 2878 T->startDefinition(); 2879 2880 QualType FieldTypes[] = { 2881 UnsignedLongTy, 2882 UnsignedLongTy, 2883 }; 2884 2885 const char *FieldNames[] = { 2886 "reserved", 2887 "Size" 2888 }; 2889 2890 for (size_t i = 0; i < 2; ++i) { 2891 FieldDecl *Field = FieldDecl::Create(*this, 2892 T, 2893 SourceLocation(), 2894 &Idents.get(FieldNames[i]), 2895 FieldTypes[i], /*TInfo=*/0, 2896 /*BitWidth=*/0, 2897 /*Mutable=*/false); 2898 Field->setAccess(AS_public); 2899 T->addDecl(Field); 2900 } 2901 2902 T->completeDefinition(); 2903 2904 BlockDescriptorType = T; 2905 2906 return getTagDeclType(BlockDescriptorType); 2907} 2908 2909void ASTContext::setBlockDescriptorType(QualType T) { 2910 const RecordType *Rec = T->getAs<RecordType>(); 2911 assert(Rec && "Invalid BlockDescriptorType"); 2912 BlockDescriptorType = Rec->getDecl(); 2913} 2914 2915QualType ASTContext::getBlockDescriptorExtendedType() { 2916 if (BlockDescriptorExtendedType) 2917 return getTagDeclType(BlockDescriptorExtendedType); 2918 2919 RecordDecl *T; 2920 // FIXME: Needs the FlagAppleBlock bit. 2921 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2922 &Idents.get("__block_descriptor_withcopydispose")); 2923 T->startDefinition(); 2924 2925 QualType FieldTypes[] = { 2926 UnsignedLongTy, 2927 UnsignedLongTy, 2928 getPointerType(VoidPtrTy), 2929 getPointerType(VoidPtrTy) 2930 }; 2931 2932 const char *FieldNames[] = { 2933 "reserved", 2934 "Size", 2935 "CopyFuncPtr", 2936 "DestroyFuncPtr" 2937 }; 2938 2939 for (size_t i = 0; i < 4; ++i) { 2940 FieldDecl *Field = FieldDecl::Create(*this, 2941 T, 2942 SourceLocation(), 2943 &Idents.get(FieldNames[i]), 2944 FieldTypes[i], /*TInfo=*/0, 2945 /*BitWidth=*/0, 2946 /*Mutable=*/false); 2947 Field->setAccess(AS_public); 2948 T->addDecl(Field); 2949 } 2950 2951 T->completeDefinition(); 2952 2953 BlockDescriptorExtendedType = T; 2954 2955 return getTagDeclType(BlockDescriptorExtendedType); 2956} 2957 2958void ASTContext::setBlockDescriptorExtendedType(QualType T) { 2959 const RecordType *Rec = T->getAs<RecordType>(); 2960 assert(Rec && "Invalid BlockDescriptorType"); 2961 BlockDescriptorExtendedType = Rec->getDecl(); 2962} 2963 2964bool ASTContext::BlockRequiresCopying(QualType Ty) { 2965 if (Ty->isBlockPointerType()) 2966 return true; 2967 if (isObjCNSObjectType(Ty)) 2968 return true; 2969 if (Ty->isObjCObjectPointerType()) 2970 return true; 2971 return false; 2972} 2973 2974QualType ASTContext::BuildByRefType(const char *DeclName, QualType Ty) { 2975 // type = struct __Block_byref_1_X { 2976 // void *__isa; 2977 // struct __Block_byref_1_X *__forwarding; 2978 // unsigned int __flags; 2979 // unsigned int __size; 2980 // void *__copy_helper; // as needed 2981 // void *__destroy_help // as needed 2982 // int X; 2983 // } * 2984 2985 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 2986 2987 // FIXME: Move up 2988 static unsigned int UniqueBlockByRefTypeID = 0; 2989 llvm::SmallString<36> Name; 2990 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 2991 ++UniqueBlockByRefTypeID << '_' << DeclName; 2992 RecordDecl *T; 2993 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2994 &Idents.get(Name.str())); 2995 T->startDefinition(); 2996 QualType Int32Ty = IntTy; 2997 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 2998 QualType FieldTypes[] = { 2999 getPointerType(VoidPtrTy), 3000 getPointerType(getTagDeclType(T)), 3001 Int32Ty, 3002 Int32Ty, 3003 getPointerType(VoidPtrTy), 3004 getPointerType(VoidPtrTy), 3005 Ty 3006 }; 3007 3008 const char *FieldNames[] = { 3009 "__isa", 3010 "__forwarding", 3011 "__flags", 3012 "__size", 3013 "__copy_helper", 3014 "__destroy_helper", 3015 DeclName, 3016 }; 3017 3018 for (size_t i = 0; i < 7; ++i) { 3019 if (!HasCopyAndDispose && i >=4 && i <= 5) 3020 continue; 3021 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3022 &Idents.get(FieldNames[i]), 3023 FieldTypes[i], /*TInfo=*/0, 3024 /*BitWidth=*/0, /*Mutable=*/false); 3025 Field->setAccess(AS_public); 3026 T->addDecl(Field); 3027 } 3028 3029 T->completeDefinition(); 3030 3031 return getPointerType(getTagDeclType(T)); 3032} 3033 3034 3035QualType ASTContext::getBlockParmType( 3036 bool BlockHasCopyDispose, 3037 llvm::SmallVectorImpl<const Expr *> &Layout) { 3038 3039 // FIXME: Move up 3040 static unsigned int UniqueBlockParmTypeID = 0; 3041 llvm::SmallString<36> Name; 3042 llvm::raw_svector_ostream(Name) << "__block_literal_" 3043 << ++UniqueBlockParmTypeID; 3044 RecordDecl *T; 3045 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3046 &Idents.get(Name.str())); 3047 T->startDefinition(); 3048 QualType FieldTypes[] = { 3049 getPointerType(VoidPtrTy), 3050 IntTy, 3051 IntTy, 3052 getPointerType(VoidPtrTy), 3053 (BlockHasCopyDispose ? 3054 getPointerType(getBlockDescriptorExtendedType()) : 3055 getPointerType(getBlockDescriptorType())) 3056 }; 3057 3058 const char *FieldNames[] = { 3059 "__isa", 3060 "__flags", 3061 "__reserved", 3062 "__FuncPtr", 3063 "__descriptor" 3064 }; 3065 3066 for (size_t i = 0; i < 5; ++i) { 3067 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3068 &Idents.get(FieldNames[i]), 3069 FieldTypes[i], /*TInfo=*/0, 3070 /*BitWidth=*/0, /*Mutable=*/false); 3071 Field->setAccess(AS_public); 3072 T->addDecl(Field); 3073 } 3074 3075 for (unsigned i = 0; i < Layout.size(); ++i) { 3076 const Expr *E = Layout[i]; 3077 3078 QualType FieldType = E->getType(); 3079 IdentifierInfo *FieldName = 0; 3080 if (isa<CXXThisExpr>(E)) { 3081 FieldName = &Idents.get("this"); 3082 } else if (const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E)) { 3083 const ValueDecl *D = BDRE->getDecl(); 3084 FieldName = D->getIdentifier(); 3085 if (BDRE->isByRef()) 3086 FieldType = BuildByRefType(D->getNameAsCString(), FieldType); 3087 } else { 3088 // Padding. 3089 assert(isa<ConstantArrayType>(FieldType) && 3090 isa<DeclRefExpr>(E) && 3091 !cast<DeclRefExpr>(E)->getDecl()->getDeclName() && 3092 "doesn't match characteristics of padding decl"); 3093 } 3094 3095 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3096 FieldName, FieldType, /*TInfo=*/0, 3097 /*BitWidth=*/0, /*Mutable=*/false); 3098 Field->setAccess(AS_public); 3099 T->addDecl(Field); 3100 } 3101 3102 T->completeDefinition(); 3103 3104 return getPointerType(getTagDeclType(T)); 3105} 3106 3107void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3108 const RecordType *Rec = T->getAs<RecordType>(); 3109 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3110 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3111} 3112 3113// This returns true if a type has been typedefed to BOOL: 3114// typedef <type> BOOL; 3115static bool isTypeTypedefedAsBOOL(QualType T) { 3116 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3117 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3118 return II->isStr("BOOL"); 3119 3120 return false; 3121} 3122 3123/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3124/// purpose. 3125CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) { 3126 CharUnits sz = getTypeSizeInChars(type); 3127 3128 // Make all integer and enum types at least as large as an int 3129 if (sz.isPositive() && type->isIntegralType()) 3130 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3131 // Treat arrays as pointers, since that's how they're passed in. 3132 else if (type->isArrayType()) 3133 sz = getTypeSizeInChars(VoidPtrTy); 3134 return sz; 3135} 3136 3137static inline 3138std::string charUnitsToString(const CharUnits &CU) { 3139 return llvm::itostr(CU.getQuantity()); 3140} 3141 3142/// getObjCEncodingForBlockDecl - Return the encoded type for this block 3143/// declaration. 3144void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3145 std::string& S) { 3146 const BlockDecl *Decl = Expr->getBlockDecl(); 3147 QualType BlockTy = 3148 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3149 // Encode result type. 3150 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3151 // Compute size of all parameters. 3152 // Start with computing size of a pointer in number of bytes. 3153 // FIXME: There might(should) be a better way of doing this computation! 3154 SourceLocation Loc; 3155 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3156 CharUnits ParmOffset = PtrSize; 3157 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3158 E = Decl->param_end(); PI != E; ++PI) { 3159 QualType PType = (*PI)->getType(); 3160 CharUnits sz = getObjCEncodingTypeSize(PType); 3161 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3162 ParmOffset += sz; 3163 } 3164 // Size of the argument frame 3165 S += charUnitsToString(ParmOffset); 3166 // Block pointer and offset. 3167 S += "@?0"; 3168 ParmOffset = PtrSize; 3169 3170 // Argument types. 3171 ParmOffset = PtrSize; 3172 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3173 Decl->param_end(); PI != E; ++PI) { 3174 ParmVarDecl *PVDecl = *PI; 3175 QualType PType = PVDecl->getOriginalType(); 3176 if (const ArrayType *AT = 3177 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3178 // Use array's original type only if it has known number of 3179 // elements. 3180 if (!isa<ConstantArrayType>(AT)) 3181 PType = PVDecl->getType(); 3182 } else if (PType->isFunctionType()) 3183 PType = PVDecl->getType(); 3184 getObjCEncodingForType(PType, S); 3185 S += charUnitsToString(ParmOffset); 3186 ParmOffset += getObjCEncodingTypeSize(PType); 3187 } 3188} 3189 3190/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3191/// declaration. 3192void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3193 std::string& S) { 3194 // FIXME: This is not very efficient. 3195 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3196 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3197 // Encode result type. 3198 getObjCEncodingForType(Decl->getResultType(), S); 3199 // Compute size of all parameters. 3200 // Start with computing size of a pointer in number of bytes. 3201 // FIXME: There might(should) be a better way of doing this computation! 3202 SourceLocation Loc; 3203 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3204 // The first two arguments (self and _cmd) are pointers; account for 3205 // their size. 3206 CharUnits ParmOffset = 2 * PtrSize; 3207 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3208 E = Decl->sel_param_end(); PI != E; ++PI) { 3209 QualType PType = (*PI)->getType(); 3210 CharUnits sz = getObjCEncodingTypeSize(PType); 3211 assert (sz.isPositive() && 3212 "getObjCEncodingForMethodDecl - Incomplete param type"); 3213 ParmOffset += sz; 3214 } 3215 S += charUnitsToString(ParmOffset); 3216 S += "@0:"; 3217 S += charUnitsToString(PtrSize); 3218 3219 // Argument types. 3220 ParmOffset = 2 * PtrSize; 3221 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3222 E = Decl->sel_param_end(); PI != E; ++PI) { 3223 ParmVarDecl *PVDecl = *PI; 3224 QualType PType = PVDecl->getOriginalType(); 3225 if (const ArrayType *AT = 3226 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3227 // Use array's original type only if it has known number of 3228 // elements. 3229 if (!isa<ConstantArrayType>(AT)) 3230 PType = PVDecl->getType(); 3231 } else if (PType->isFunctionType()) 3232 PType = PVDecl->getType(); 3233 // Process argument qualifiers for user supplied arguments; such as, 3234 // 'in', 'inout', etc. 3235 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3236 getObjCEncodingForType(PType, S); 3237 S += charUnitsToString(ParmOffset); 3238 ParmOffset += getObjCEncodingTypeSize(PType); 3239 } 3240} 3241 3242/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3243/// property declaration. If non-NULL, Container must be either an 3244/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3245/// NULL when getting encodings for protocol properties. 3246/// Property attributes are stored as a comma-delimited C string. The simple 3247/// attributes readonly and bycopy are encoded as single characters. The 3248/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3249/// encoded as single characters, followed by an identifier. Property types 3250/// are also encoded as a parametrized attribute. The characters used to encode 3251/// these attributes are defined by the following enumeration: 3252/// @code 3253/// enum PropertyAttributes { 3254/// kPropertyReadOnly = 'R', // property is read-only. 3255/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3256/// kPropertyByref = '&', // property is a reference to the value last assigned 3257/// kPropertyDynamic = 'D', // property is dynamic 3258/// kPropertyGetter = 'G', // followed by getter selector name 3259/// kPropertySetter = 'S', // followed by setter selector name 3260/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3261/// kPropertyType = 't' // followed by old-style type encoding. 3262/// kPropertyWeak = 'W' // 'weak' property 3263/// kPropertyStrong = 'P' // property GC'able 3264/// kPropertyNonAtomic = 'N' // property non-atomic 3265/// }; 3266/// @endcode 3267void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3268 const Decl *Container, 3269 std::string& S) { 3270 // Collect information from the property implementation decl(s). 3271 bool Dynamic = false; 3272 ObjCPropertyImplDecl *SynthesizePID = 0; 3273 3274 // FIXME: Duplicated code due to poor abstraction. 3275 if (Container) { 3276 if (const ObjCCategoryImplDecl *CID = 3277 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3278 for (ObjCCategoryImplDecl::propimpl_iterator 3279 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3280 i != e; ++i) { 3281 ObjCPropertyImplDecl *PID = *i; 3282 if (PID->getPropertyDecl() == PD) { 3283 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3284 Dynamic = true; 3285 } else { 3286 SynthesizePID = PID; 3287 } 3288 } 3289 } 3290 } else { 3291 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3292 for (ObjCCategoryImplDecl::propimpl_iterator 3293 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3294 i != e; ++i) { 3295 ObjCPropertyImplDecl *PID = *i; 3296 if (PID->getPropertyDecl() == PD) { 3297 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3298 Dynamic = true; 3299 } else { 3300 SynthesizePID = PID; 3301 } 3302 } 3303 } 3304 } 3305 } 3306 3307 // FIXME: This is not very efficient. 3308 S = "T"; 3309 3310 // Encode result type. 3311 // GCC has some special rules regarding encoding of properties which 3312 // closely resembles encoding of ivars. 3313 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3314 true /* outermost type */, 3315 true /* encoding for property */); 3316 3317 if (PD->isReadOnly()) { 3318 S += ",R"; 3319 } else { 3320 switch (PD->getSetterKind()) { 3321 case ObjCPropertyDecl::Assign: break; 3322 case ObjCPropertyDecl::Copy: S += ",C"; break; 3323 case ObjCPropertyDecl::Retain: S += ",&"; break; 3324 } 3325 } 3326 3327 // It really isn't clear at all what this means, since properties 3328 // are "dynamic by default". 3329 if (Dynamic) 3330 S += ",D"; 3331 3332 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3333 S += ",N"; 3334 3335 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3336 S += ",G"; 3337 S += PD->getGetterName().getAsString(); 3338 } 3339 3340 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3341 S += ",S"; 3342 S += PD->getSetterName().getAsString(); 3343 } 3344 3345 if (SynthesizePID) { 3346 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3347 S += ",V"; 3348 S += OID->getNameAsString(); 3349 } 3350 3351 // FIXME: OBJCGC: weak & strong 3352} 3353 3354/// getLegacyIntegralTypeEncoding - 3355/// Another legacy compatibility encoding: 32-bit longs are encoded as 3356/// 'l' or 'L' , but not always. For typedefs, we need to use 3357/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3358/// 3359void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3360 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3361 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3362 if (BT->getKind() == BuiltinType::ULong && 3363 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3364 PointeeTy = UnsignedIntTy; 3365 else 3366 if (BT->getKind() == BuiltinType::Long && 3367 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3368 PointeeTy = IntTy; 3369 } 3370 } 3371} 3372 3373void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3374 const FieldDecl *Field) { 3375 // We follow the behavior of gcc, expanding structures which are 3376 // directly pointed to, and expanding embedded structures. Note that 3377 // these rules are sufficient to prevent recursive encoding of the 3378 // same type. 3379 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3380 true /* outermost type */); 3381} 3382 3383static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 3384 switch (T->getAs<BuiltinType>()->getKind()) { 3385 default: assert(0 && "Unhandled builtin type kind"); 3386 case BuiltinType::Void: return 'v'; 3387 case BuiltinType::Bool: return 'B'; 3388 case BuiltinType::Char_U: 3389 case BuiltinType::UChar: return 'C'; 3390 case BuiltinType::UShort: return 'S'; 3391 case BuiltinType::UInt: return 'I'; 3392 case BuiltinType::ULong: 3393 return 3394 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3395 case BuiltinType::UInt128: return 'T'; 3396 case BuiltinType::ULongLong: return 'Q'; 3397 case BuiltinType::Char_S: 3398 case BuiltinType::SChar: return 'c'; 3399 case BuiltinType::Short: return 's'; 3400 case BuiltinType::Int: return 'i'; 3401 case BuiltinType::Long: 3402 return 3403 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'l' : 'q'; 3404 case BuiltinType::LongLong: return 'q'; 3405 case BuiltinType::Int128: return 't'; 3406 case BuiltinType::Float: return 'f'; 3407 case BuiltinType::Double: return 'd'; 3408 case BuiltinType::LongDouble: return 'd'; 3409 } 3410} 3411 3412static void EncodeBitField(const ASTContext *Context, std::string& S, 3413 QualType T, const FieldDecl *FD) { 3414 const Expr *E = FD->getBitWidth(); 3415 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3416 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3417 S += 'b'; 3418 // The NeXT runtime encodes bit fields as b followed by the number of bits. 3419 // The GNU runtime requires more information; bitfields are encoded as b, 3420 // then the offset (in bits) of the first element, then the type of the 3421 // bitfield, then the size in bits. For example, in this structure: 3422 // 3423 // struct 3424 // { 3425 // int integer; 3426 // int flags:2; 3427 // }; 3428 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 3429 // runtime, but b32i2 for the GNU runtime. The reason for this extra 3430 // information is not especially sensible, but we're stuck with it for 3431 // compatibility with GCC, although providing it breaks anything that 3432 // actually uses runtime introspection and wants to work on both runtimes... 3433 if (!Ctx->getLangOptions().NeXTRuntime) { 3434 const RecordDecl *RD = FD->getParent(); 3435 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 3436 // FIXME: This same linear search is also used in ExprConstant - it might 3437 // be better if the FieldDecl stored its offset. We'd be increasing the 3438 // size of the object slightly, but saving some time every time it is used. 3439 unsigned i = 0; 3440 for (RecordDecl::field_iterator Field = RD->field_begin(), 3441 FieldEnd = RD->field_end(); 3442 Field != FieldEnd; (void)++Field, ++i) { 3443 if (*Field == FD) 3444 break; 3445 } 3446 S += llvm::utostr(RL.getFieldOffset(i)); 3447 S += ObjCEncodingForPrimitiveKind(Context, T); 3448 } 3449 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3450 S += llvm::utostr(N); 3451} 3452 3453// FIXME: Use SmallString for accumulating string. 3454void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3455 bool ExpandPointedToStructures, 3456 bool ExpandStructures, 3457 const FieldDecl *FD, 3458 bool OutermostType, 3459 bool EncodingProperty) { 3460 if (T->getAs<BuiltinType>()) { 3461 if (FD && FD->isBitField()) 3462 return EncodeBitField(this, S, T, FD); 3463 S += ObjCEncodingForPrimitiveKind(this, T); 3464 return; 3465 } 3466 3467 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3468 S += 'j'; 3469 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3470 false); 3471 return; 3472 } 3473 3474 // encoding for pointer or r3eference types. 3475 QualType PointeeTy; 3476 if (const PointerType *PT = T->getAs<PointerType>()) { 3477 if (PT->isObjCSelType()) { 3478 S += ':'; 3479 return; 3480 } 3481 PointeeTy = PT->getPointeeType(); 3482 } 3483 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3484 PointeeTy = RT->getPointeeType(); 3485 if (!PointeeTy.isNull()) { 3486 bool isReadOnly = false; 3487 // For historical/compatibility reasons, the read-only qualifier of the 3488 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3489 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3490 // Also, do not emit the 'r' for anything but the outermost type! 3491 if (isa<TypedefType>(T.getTypePtr())) { 3492 if (OutermostType && T.isConstQualified()) { 3493 isReadOnly = true; 3494 S += 'r'; 3495 } 3496 } else if (OutermostType) { 3497 QualType P = PointeeTy; 3498 while (P->getAs<PointerType>()) 3499 P = P->getAs<PointerType>()->getPointeeType(); 3500 if (P.isConstQualified()) { 3501 isReadOnly = true; 3502 S += 'r'; 3503 } 3504 } 3505 if (isReadOnly) { 3506 // Another legacy compatibility encoding. Some ObjC qualifier and type 3507 // combinations need to be rearranged. 3508 // Rewrite "in const" from "nr" to "rn" 3509 if (llvm::StringRef(S).endswith("nr")) 3510 S.replace(S.end()-2, S.end(), "rn"); 3511 } 3512 3513 if (PointeeTy->isCharType()) { 3514 // char pointer types should be encoded as '*' unless it is a 3515 // type that has been typedef'd to 'BOOL'. 3516 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3517 S += '*'; 3518 return; 3519 } 3520 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3521 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3522 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3523 S += '#'; 3524 return; 3525 } 3526 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3527 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3528 S += '@'; 3529 return; 3530 } 3531 // fall through... 3532 } 3533 S += '^'; 3534 getLegacyIntegralTypeEncoding(PointeeTy); 3535 3536 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3537 NULL); 3538 return; 3539 } 3540 3541 if (const ArrayType *AT = 3542 // Ignore type qualifiers etc. 3543 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3544 if (isa<IncompleteArrayType>(AT)) { 3545 // Incomplete arrays are encoded as a pointer to the array element. 3546 S += '^'; 3547 3548 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3549 false, ExpandStructures, FD); 3550 } else { 3551 S += '['; 3552 3553 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3554 S += llvm::utostr(CAT->getSize().getZExtValue()); 3555 else { 3556 //Variable length arrays are encoded as a regular array with 0 elements. 3557 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3558 S += '0'; 3559 } 3560 3561 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3562 false, ExpandStructures, FD); 3563 S += ']'; 3564 } 3565 return; 3566 } 3567 3568 if (T->getAs<FunctionType>()) { 3569 S += '?'; 3570 return; 3571 } 3572 3573 if (const RecordType *RTy = T->getAs<RecordType>()) { 3574 RecordDecl *RDecl = RTy->getDecl(); 3575 S += RDecl->isUnion() ? '(' : '{'; 3576 // Anonymous structures print as '?' 3577 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3578 S += II->getName(); 3579 if (ClassTemplateSpecializationDecl *Spec 3580 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 3581 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 3582 std::string TemplateArgsStr 3583 = TemplateSpecializationType::PrintTemplateArgumentList( 3584 TemplateArgs.getFlatArgumentList(), 3585 TemplateArgs.flat_size(), 3586 (*this).PrintingPolicy); 3587 3588 S += TemplateArgsStr; 3589 } 3590 } else { 3591 S += '?'; 3592 } 3593 if (ExpandStructures) { 3594 S += '='; 3595 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3596 FieldEnd = RDecl->field_end(); 3597 Field != FieldEnd; ++Field) { 3598 if (FD) { 3599 S += '"'; 3600 S += Field->getNameAsString(); 3601 S += '"'; 3602 } 3603 3604 // Special case bit-fields. 3605 if (Field->isBitField()) { 3606 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3607 (*Field)); 3608 } else { 3609 QualType qt = Field->getType(); 3610 getLegacyIntegralTypeEncoding(qt); 3611 getObjCEncodingForTypeImpl(qt, S, false, true, 3612 FD); 3613 } 3614 } 3615 } 3616 S += RDecl->isUnion() ? ')' : '}'; 3617 return; 3618 } 3619 3620 if (T->isEnumeralType()) { 3621 if (FD && FD->isBitField()) 3622 EncodeBitField(this, S, T, FD); 3623 else 3624 S += 'i'; 3625 return; 3626 } 3627 3628 if (T->isBlockPointerType()) { 3629 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3630 return; 3631 } 3632 3633 // Ignore protocol qualifiers when mangling at this level. 3634 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 3635 T = OT->getBaseType(); 3636 3637 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3638 // @encode(class_name) 3639 ObjCInterfaceDecl *OI = OIT->getDecl(); 3640 S += '{'; 3641 const IdentifierInfo *II = OI->getIdentifier(); 3642 S += II->getName(); 3643 S += '='; 3644 llvm::SmallVector<FieldDecl*, 32> RecFields; 3645 CollectObjCIvars(OI, RecFields); 3646 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 3647 if (RecFields[i]->isBitField()) 3648 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3649 RecFields[i]); 3650 else 3651 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3652 FD); 3653 } 3654 S += '}'; 3655 return; 3656 } 3657 3658 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 3659 if (OPT->isObjCIdType()) { 3660 S += '@'; 3661 return; 3662 } 3663 3664 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 3665 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 3666 // Since this is a binary compatibility issue, need to consult with runtime 3667 // folks. Fortunately, this is a *very* obsure construct. 3668 S += '#'; 3669 return; 3670 } 3671 3672 if (OPT->isObjCQualifiedIdType()) { 3673 getObjCEncodingForTypeImpl(getObjCIdType(), S, 3674 ExpandPointedToStructures, 3675 ExpandStructures, FD); 3676 if (FD || EncodingProperty) { 3677 // Note that we do extended encoding of protocol qualifer list 3678 // Only when doing ivar or property encoding. 3679 S += '"'; 3680 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3681 E = OPT->qual_end(); I != E; ++I) { 3682 S += '<'; 3683 S += (*I)->getNameAsString(); 3684 S += '>'; 3685 } 3686 S += '"'; 3687 } 3688 return; 3689 } 3690 3691 QualType PointeeTy = OPT->getPointeeType(); 3692 if (!EncodingProperty && 3693 isa<TypedefType>(PointeeTy.getTypePtr())) { 3694 // Another historical/compatibility reason. 3695 // We encode the underlying type which comes out as 3696 // {...}; 3697 S += '^'; 3698 getObjCEncodingForTypeImpl(PointeeTy, S, 3699 false, ExpandPointedToStructures, 3700 NULL); 3701 return; 3702 } 3703 3704 S += '@'; 3705 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 3706 S += '"'; 3707 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 3708 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3709 E = OPT->qual_end(); I != E; ++I) { 3710 S += '<'; 3711 S += (*I)->getNameAsString(); 3712 S += '>'; 3713 } 3714 S += '"'; 3715 } 3716 return; 3717 } 3718 3719 // gcc just blithely ignores member pointers. 3720 // TODO: maybe there should be a mangling for these 3721 if (T->getAs<MemberPointerType>()) 3722 return; 3723 3724 assert(0 && "@encode for type not implemented!"); 3725} 3726 3727void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 3728 std::string& S) const { 3729 if (QT & Decl::OBJC_TQ_In) 3730 S += 'n'; 3731 if (QT & Decl::OBJC_TQ_Inout) 3732 S += 'N'; 3733 if (QT & Decl::OBJC_TQ_Out) 3734 S += 'o'; 3735 if (QT & Decl::OBJC_TQ_Bycopy) 3736 S += 'O'; 3737 if (QT & Decl::OBJC_TQ_Byref) 3738 S += 'R'; 3739 if (QT & Decl::OBJC_TQ_Oneway) 3740 S += 'V'; 3741} 3742 3743void ASTContext::setBuiltinVaListType(QualType T) { 3744 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 3745 3746 BuiltinVaListType = T; 3747} 3748 3749void ASTContext::setObjCIdType(QualType T) { 3750 ObjCIdTypedefType = T; 3751} 3752 3753void ASTContext::setObjCSelType(QualType T) { 3754 ObjCSelTypedefType = T; 3755} 3756 3757void ASTContext::setObjCProtoType(QualType QT) { 3758 ObjCProtoType = QT; 3759} 3760 3761void ASTContext::setObjCClassType(QualType T) { 3762 ObjCClassTypedefType = T; 3763} 3764 3765void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 3766 assert(ObjCConstantStringType.isNull() && 3767 "'NSConstantString' type already set!"); 3768 3769 ObjCConstantStringType = getObjCInterfaceType(Decl); 3770} 3771 3772/// \brief Retrieve the template name that corresponds to a non-empty 3773/// lookup. 3774TemplateName ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 3775 UnresolvedSetIterator End) { 3776 unsigned size = End - Begin; 3777 assert(size > 1 && "set is not overloaded!"); 3778 3779 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 3780 size * sizeof(FunctionTemplateDecl*)); 3781 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 3782 3783 NamedDecl **Storage = OT->getStorage(); 3784 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 3785 NamedDecl *D = *I; 3786 assert(isa<FunctionTemplateDecl>(D) || 3787 (isa<UsingShadowDecl>(D) && 3788 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 3789 *Storage++ = D; 3790 } 3791 3792 return TemplateName(OT); 3793} 3794 3795/// \brief Retrieve the template name that represents a qualified 3796/// template name such as \c std::vector. 3797TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 3798 bool TemplateKeyword, 3799 TemplateDecl *Template) { 3800 // FIXME: Canonicalization? 3801 llvm::FoldingSetNodeID ID; 3802 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 3803 3804 void *InsertPos = 0; 3805 QualifiedTemplateName *QTN = 3806 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3807 if (!QTN) { 3808 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 3809 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 3810 } 3811 3812 return TemplateName(QTN); 3813} 3814 3815/// \brief Retrieve the template name that represents a dependent 3816/// template name such as \c MetaFun::template apply. 3817TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3818 const IdentifierInfo *Name) { 3819 assert((!NNS || NNS->isDependent()) && 3820 "Nested name specifier must be dependent"); 3821 3822 llvm::FoldingSetNodeID ID; 3823 DependentTemplateName::Profile(ID, NNS, Name); 3824 3825 void *InsertPos = 0; 3826 DependentTemplateName *QTN = 3827 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3828 3829 if (QTN) 3830 return TemplateName(QTN); 3831 3832 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3833 if (CanonNNS == NNS) { 3834 QTN = new (*this,4) DependentTemplateName(NNS, Name); 3835 } else { 3836 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 3837 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 3838 DependentTemplateName *CheckQTN = 3839 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3840 assert(!CheckQTN && "Dependent type name canonicalization broken"); 3841 (void)CheckQTN; 3842 } 3843 3844 DependentTemplateNames.InsertNode(QTN, InsertPos); 3845 return TemplateName(QTN); 3846} 3847 3848/// \brief Retrieve the template name that represents a dependent 3849/// template name such as \c MetaFun::template operator+. 3850TemplateName 3851ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3852 OverloadedOperatorKind Operator) { 3853 assert((!NNS || NNS->isDependent()) && 3854 "Nested name specifier must be dependent"); 3855 3856 llvm::FoldingSetNodeID ID; 3857 DependentTemplateName::Profile(ID, NNS, Operator); 3858 3859 void *InsertPos = 0; 3860 DependentTemplateName *QTN 3861 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3862 3863 if (QTN) 3864 return TemplateName(QTN); 3865 3866 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3867 if (CanonNNS == NNS) { 3868 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 3869 } else { 3870 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 3871 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 3872 3873 DependentTemplateName *CheckQTN 3874 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3875 assert(!CheckQTN && "Dependent template name canonicalization broken"); 3876 (void)CheckQTN; 3877 } 3878 3879 DependentTemplateNames.InsertNode(QTN, InsertPos); 3880 return TemplateName(QTN); 3881} 3882 3883/// getFromTargetType - Given one of the integer types provided by 3884/// TargetInfo, produce the corresponding type. The unsigned @p Type 3885/// is actually a value of type @c TargetInfo::IntType. 3886CanQualType ASTContext::getFromTargetType(unsigned Type) const { 3887 switch (Type) { 3888 case TargetInfo::NoInt: return CanQualType(); 3889 case TargetInfo::SignedShort: return ShortTy; 3890 case TargetInfo::UnsignedShort: return UnsignedShortTy; 3891 case TargetInfo::SignedInt: return IntTy; 3892 case TargetInfo::UnsignedInt: return UnsignedIntTy; 3893 case TargetInfo::SignedLong: return LongTy; 3894 case TargetInfo::UnsignedLong: return UnsignedLongTy; 3895 case TargetInfo::SignedLongLong: return LongLongTy; 3896 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 3897 } 3898 3899 assert(false && "Unhandled TargetInfo::IntType value"); 3900 return CanQualType(); 3901} 3902 3903//===----------------------------------------------------------------------===// 3904// Type Predicates. 3905//===----------------------------------------------------------------------===// 3906 3907/// isObjCNSObjectType - Return true if this is an NSObject object using 3908/// NSObject attribute on a c-style pointer type. 3909/// FIXME - Make it work directly on types. 3910/// FIXME: Move to Type. 3911/// 3912bool ASTContext::isObjCNSObjectType(QualType Ty) const { 3913 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 3914 if (TypedefDecl *TD = TDT->getDecl()) 3915 if (TD->getAttr<ObjCNSObjectAttr>()) 3916 return true; 3917 } 3918 return false; 3919} 3920 3921/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 3922/// garbage collection attribute. 3923/// 3924Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 3925 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 3926 if (getLangOptions().ObjC1 && 3927 getLangOptions().getGCMode() != LangOptions::NonGC) { 3928 GCAttrs = Ty.getObjCGCAttr(); 3929 // Default behavious under objective-c's gc is for objective-c pointers 3930 // (or pointers to them) be treated as though they were declared 3931 // as __strong. 3932 if (GCAttrs == Qualifiers::GCNone) { 3933 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 3934 GCAttrs = Qualifiers::Strong; 3935 else if (Ty->isPointerType()) 3936 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 3937 } 3938 // Non-pointers have none gc'able attribute regardless of the attribute 3939 // set on them. 3940 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 3941 return Qualifiers::GCNone; 3942 } 3943 return GCAttrs; 3944} 3945 3946//===----------------------------------------------------------------------===// 3947// Type Compatibility Testing 3948//===----------------------------------------------------------------------===// 3949 3950/// areCompatVectorTypes - Return true if the two specified vector types are 3951/// compatible. 3952static bool areCompatVectorTypes(const VectorType *LHS, 3953 const VectorType *RHS) { 3954 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 3955 return LHS->getElementType() == RHS->getElementType() && 3956 LHS->getNumElements() == RHS->getNumElements(); 3957} 3958 3959//===----------------------------------------------------------------------===// 3960// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 3961//===----------------------------------------------------------------------===// 3962 3963/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 3964/// inheritance hierarchy of 'rProto'. 3965bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 3966 ObjCProtocolDecl *rProto) { 3967 if (lProto == rProto) 3968 return true; 3969 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 3970 E = rProto->protocol_end(); PI != E; ++PI) 3971 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 3972 return true; 3973 return false; 3974} 3975 3976/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 3977/// return true if lhs's protocols conform to rhs's protocol; false 3978/// otherwise. 3979bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 3980 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 3981 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 3982 return false; 3983} 3984 3985/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 3986/// ObjCQualifiedIDType. 3987bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 3988 bool compare) { 3989 // Allow id<P..> and an 'id' or void* type in all cases. 3990 if (lhs->isVoidPointerType() || 3991 lhs->isObjCIdType() || lhs->isObjCClassType()) 3992 return true; 3993 else if (rhs->isVoidPointerType() || 3994 rhs->isObjCIdType() || rhs->isObjCClassType()) 3995 return true; 3996 3997 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 3998 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 3999 4000 if (!rhsOPT) return false; 4001 4002 if (rhsOPT->qual_empty()) { 4003 // If the RHS is a unqualified interface pointer "NSString*", 4004 // make sure we check the class hierarchy. 4005 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4006 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4007 E = lhsQID->qual_end(); I != E; ++I) { 4008 // when comparing an id<P> on lhs with a static type on rhs, 4009 // see if static class implements all of id's protocols, directly or 4010 // through its super class and categories. 4011 if (!rhsID->ClassImplementsProtocol(*I, true)) 4012 return false; 4013 } 4014 } 4015 // If there are no qualifiers and no interface, we have an 'id'. 4016 return true; 4017 } 4018 // Both the right and left sides have qualifiers. 4019 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4020 E = lhsQID->qual_end(); I != E; ++I) { 4021 ObjCProtocolDecl *lhsProto = *I; 4022 bool match = false; 4023 4024 // when comparing an id<P> on lhs with a static type on rhs, 4025 // see if static class implements all of id's protocols, directly or 4026 // through its super class and categories. 4027 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4028 E = rhsOPT->qual_end(); J != E; ++J) { 4029 ObjCProtocolDecl *rhsProto = *J; 4030 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4031 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4032 match = true; 4033 break; 4034 } 4035 } 4036 // If the RHS is a qualified interface pointer "NSString<P>*", 4037 // make sure we check the class hierarchy. 4038 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4039 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4040 E = lhsQID->qual_end(); I != E; ++I) { 4041 // when comparing an id<P> on lhs with a static type on rhs, 4042 // see if static class implements all of id's protocols, directly or 4043 // through its super class and categories. 4044 if (rhsID->ClassImplementsProtocol(*I, true)) { 4045 match = true; 4046 break; 4047 } 4048 } 4049 } 4050 if (!match) 4051 return false; 4052 } 4053 4054 return true; 4055 } 4056 4057 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4058 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4059 4060 if (const ObjCObjectPointerType *lhsOPT = 4061 lhs->getAsObjCInterfacePointerType()) { 4062 if (lhsOPT->qual_empty()) { 4063 bool match = false; 4064 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4065 for (ObjCObjectPointerType::qual_iterator I = rhsQID->qual_begin(), 4066 E = rhsQID->qual_end(); I != E; ++I) { 4067 // when comparing an id<P> on lhs with a static type on rhs, 4068 // see if static class implements all of id's protocols, directly or 4069 // through its super class and categories. 4070 if (lhsID->ClassImplementsProtocol(*I, true)) { 4071 match = true; 4072 break; 4073 } 4074 } 4075 if (!match) 4076 return false; 4077 } 4078 return true; 4079 } 4080 // Both the right and left sides have qualifiers. 4081 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4082 E = lhsOPT->qual_end(); I != E; ++I) { 4083 ObjCProtocolDecl *lhsProto = *I; 4084 bool match = false; 4085 4086 // when comparing an id<P> on lhs with a static type on rhs, 4087 // see if static class implements all of id's protocols, directly or 4088 // through its super class and categories. 4089 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4090 E = rhsQID->qual_end(); J != E; ++J) { 4091 ObjCProtocolDecl *rhsProto = *J; 4092 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4093 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4094 match = true; 4095 break; 4096 } 4097 } 4098 if (!match) 4099 return false; 4100 } 4101 return true; 4102 } 4103 return false; 4104} 4105 4106/// canAssignObjCInterfaces - Return true if the two interface types are 4107/// compatible for assignment from RHS to LHS. This handles validation of any 4108/// protocol qualifiers on the LHS or RHS. 4109/// 4110bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4111 const ObjCObjectPointerType *RHSOPT) { 4112 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4113 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4114 4115 // If either type represents the built-in 'id' or 'Class' types, return true. 4116 if (LHS->isObjCUnqualifiedIdOrClass() || 4117 RHS->isObjCUnqualifiedIdOrClass()) 4118 return true; 4119 4120 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 4121 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4122 QualType(RHSOPT,0), 4123 false); 4124 4125 // If we have 2 user-defined types, fall into that path. 4126 if (LHS->getInterface() && RHS->getInterface()) 4127 return canAssignObjCInterfaces(LHS, RHS); 4128 4129 return false; 4130} 4131 4132/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4133/// for providing type-safty for objective-c pointers used to pass/return 4134/// arguments in block literals. When passed as arguments, passing 'A*' where 4135/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4136/// not OK. For the return type, the opposite is not OK. 4137bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4138 const ObjCObjectPointerType *LHSOPT, 4139 const ObjCObjectPointerType *RHSOPT) { 4140 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4141 return true; 4142 4143 if (LHSOPT->isObjCBuiltinType()) { 4144 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4145 } 4146 4147 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4148 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4149 QualType(RHSOPT,0), 4150 false); 4151 4152 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4153 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4154 if (LHS && RHS) { // We have 2 user-defined types. 4155 if (LHS != RHS) { 4156 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4157 return false; 4158 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4159 return true; 4160 } 4161 else 4162 return true; 4163 } 4164 return false; 4165} 4166 4167/// getIntersectionOfProtocols - This routine finds the intersection of set 4168/// of protocols inherited from two distinct objective-c pointer objects. 4169/// It is used to build composite qualifier list of the composite type of 4170/// the conditional expression involving two objective-c pointer objects. 4171static 4172void getIntersectionOfProtocols(ASTContext &Context, 4173 const ObjCObjectPointerType *LHSOPT, 4174 const ObjCObjectPointerType *RHSOPT, 4175 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4176 4177 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4178 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4179 assert(LHS->getInterface() && "LHS must have an interface base"); 4180 assert(RHS->getInterface() && "RHS must have an interface base"); 4181 4182 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4183 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4184 if (LHSNumProtocols > 0) 4185 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4186 else { 4187 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4188 Context.CollectInheritedProtocols(LHS->getInterface(), 4189 LHSInheritedProtocols); 4190 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4191 LHSInheritedProtocols.end()); 4192 } 4193 4194 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4195 if (RHSNumProtocols > 0) { 4196 ObjCProtocolDecl **RHSProtocols = 4197 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4198 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4199 if (InheritedProtocolSet.count(RHSProtocols[i])) 4200 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4201 } 4202 else { 4203 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4204 Context.CollectInheritedProtocols(RHS->getInterface(), 4205 RHSInheritedProtocols); 4206 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4207 RHSInheritedProtocols.begin(), 4208 E = RHSInheritedProtocols.end(); I != E; ++I) 4209 if (InheritedProtocolSet.count((*I))) 4210 IntersectionOfProtocols.push_back((*I)); 4211 } 4212} 4213 4214/// areCommonBaseCompatible - Returns common base class of the two classes if 4215/// one found. Note that this is O'2 algorithm. But it will be called as the 4216/// last type comparison in a ?-exp of ObjC pointer types before a 4217/// warning is issued. So, its invokation is extremely rare. 4218QualType ASTContext::areCommonBaseCompatible( 4219 const ObjCObjectPointerType *Lptr, 4220 const ObjCObjectPointerType *Rptr) { 4221 const ObjCObjectType *LHS = Lptr->getObjectType(); 4222 const ObjCObjectType *RHS = Rptr->getObjectType(); 4223 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 4224 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 4225 if (!LDecl || !RDecl) 4226 return QualType(); 4227 4228 while ((LDecl = LDecl->getSuperClass())) { 4229 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 4230 if (canAssignObjCInterfaces(LHS, RHS)) { 4231 llvm::SmallVector<ObjCProtocolDecl *, 8> Protocols; 4232 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 4233 4234 QualType Result = QualType(LHS, 0); 4235 if (!Protocols.empty()) 4236 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 4237 Result = getObjCObjectPointerType(Result); 4238 return Result; 4239 } 4240 } 4241 4242 return QualType(); 4243} 4244 4245bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 4246 const ObjCObjectType *RHS) { 4247 assert(LHS->getInterface() && "LHS is not an interface type"); 4248 assert(RHS->getInterface() && "RHS is not an interface type"); 4249 4250 // Verify that the base decls are compatible: the RHS must be a subclass of 4251 // the LHS. 4252 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 4253 return false; 4254 4255 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4256 // protocol qualified at all, then we are good. 4257 if (LHS->getNumProtocols() == 0) 4258 return true; 4259 4260 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4261 // isn't a superset. 4262 if (RHS->getNumProtocols() == 0) 4263 return true; // FIXME: should return false! 4264 4265 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 4266 LHSPE = LHS->qual_end(); 4267 LHSPI != LHSPE; LHSPI++) { 4268 bool RHSImplementsProtocol = false; 4269 4270 // If the RHS doesn't implement the protocol on the left, the types 4271 // are incompatible. 4272 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 4273 RHSPE = RHS->qual_end(); 4274 RHSPI != RHSPE; RHSPI++) { 4275 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4276 RHSImplementsProtocol = true; 4277 break; 4278 } 4279 } 4280 // FIXME: For better diagnostics, consider passing back the protocol name. 4281 if (!RHSImplementsProtocol) 4282 return false; 4283 } 4284 // The RHS implements all protocols listed on the LHS. 4285 return true; 4286} 4287 4288bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4289 // get the "pointed to" types 4290 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4291 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4292 4293 if (!LHSOPT || !RHSOPT) 4294 return false; 4295 4296 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4297 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4298} 4299 4300/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4301/// both shall have the identically qualified version of a compatible type. 4302/// C99 6.2.7p1: Two types have compatible types if their types are the 4303/// same. See 6.7.[2,3,5] for additional rules. 4304bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 4305 if (getLangOptions().CPlusPlus) 4306 return hasSameType(LHS, RHS); 4307 4308 return !mergeTypes(LHS, RHS).isNull(); 4309} 4310 4311bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 4312 return !mergeTypes(LHS, RHS, true).isNull(); 4313} 4314 4315QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 4316 bool OfBlockPointer) { 4317 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4318 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4319 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4320 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4321 bool allLTypes = true; 4322 bool allRTypes = true; 4323 4324 // Check return type 4325 QualType retType; 4326 if (OfBlockPointer) 4327 retType = mergeTypes(rbase->getResultType(), lbase->getResultType(), true); 4328 else 4329 retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 4330 if (retType.isNull()) return QualType(); 4331 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 4332 allLTypes = false; 4333 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 4334 allRTypes = false; 4335 // FIXME: double check this 4336 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 4337 // rbase->getRegParmAttr() != 0 && 4338 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 4339 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 4340 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 4341 unsigned RegParm = lbaseInfo.getRegParm() == 0 ? rbaseInfo.getRegParm() : 4342 lbaseInfo.getRegParm(); 4343 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 4344 if (NoReturn != lbaseInfo.getNoReturn() || 4345 RegParm != lbaseInfo.getRegParm()) 4346 allLTypes = false; 4347 if (NoReturn != rbaseInfo.getNoReturn() || 4348 RegParm != rbaseInfo.getRegParm()) 4349 allRTypes = false; 4350 CallingConv lcc = lbaseInfo.getCC(); 4351 CallingConv rcc = rbaseInfo.getCC(); 4352 // Compatible functions must have compatible calling conventions 4353 if (!isSameCallConv(lcc, rcc)) 4354 return QualType(); 4355 4356 if (lproto && rproto) { // two C99 style function prototypes 4357 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4358 "C++ shouldn't be here"); 4359 unsigned lproto_nargs = lproto->getNumArgs(); 4360 unsigned rproto_nargs = rproto->getNumArgs(); 4361 4362 // Compatible functions must have the same number of arguments 4363 if (lproto_nargs != rproto_nargs) 4364 return QualType(); 4365 4366 // Variadic and non-variadic functions aren't compatible 4367 if (lproto->isVariadic() != rproto->isVariadic()) 4368 return QualType(); 4369 4370 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4371 return QualType(); 4372 4373 // Check argument compatibility 4374 llvm::SmallVector<QualType, 10> types; 4375 for (unsigned i = 0; i < lproto_nargs; i++) { 4376 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4377 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4378 QualType argtype = mergeTypes(largtype, rargtype, OfBlockPointer); 4379 if (argtype.isNull()) return QualType(); 4380 types.push_back(argtype); 4381 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4382 allLTypes = false; 4383 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4384 allRTypes = false; 4385 } 4386 if (allLTypes) return lhs; 4387 if (allRTypes) return rhs; 4388 return getFunctionType(retType, types.begin(), types.size(), 4389 lproto->isVariadic(), lproto->getTypeQuals(), 4390 false, false, 0, 0, 4391 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4392 } 4393 4394 if (lproto) allRTypes = false; 4395 if (rproto) allLTypes = false; 4396 4397 const FunctionProtoType *proto = lproto ? lproto : rproto; 4398 if (proto) { 4399 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4400 if (proto->isVariadic()) return QualType(); 4401 // Check that the types are compatible with the types that 4402 // would result from default argument promotions (C99 6.7.5.3p15). 4403 // The only types actually affected are promotable integer 4404 // types and floats, which would be passed as a different 4405 // type depending on whether the prototype is visible. 4406 unsigned proto_nargs = proto->getNumArgs(); 4407 for (unsigned i = 0; i < proto_nargs; ++i) { 4408 QualType argTy = proto->getArgType(i); 4409 4410 // Look at the promotion type of enum types, since that is the type used 4411 // to pass enum values. 4412 if (const EnumType *Enum = argTy->getAs<EnumType>()) 4413 argTy = Enum->getDecl()->getPromotionType(); 4414 4415 if (argTy->isPromotableIntegerType() || 4416 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4417 return QualType(); 4418 } 4419 4420 if (allLTypes) return lhs; 4421 if (allRTypes) return rhs; 4422 return getFunctionType(retType, proto->arg_type_begin(), 4423 proto->getNumArgs(), proto->isVariadic(), 4424 proto->getTypeQuals(), 4425 false, false, 0, 0, 4426 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4427 } 4428 4429 if (allLTypes) return lhs; 4430 if (allRTypes) return rhs; 4431 FunctionType::ExtInfo Info(NoReturn, RegParm, lcc); 4432 return getFunctionNoProtoType(retType, Info); 4433} 4434 4435QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 4436 bool OfBlockPointer) { 4437 // C++ [expr]: If an expression initially has the type "reference to T", the 4438 // type is adjusted to "T" prior to any further analysis, the expression 4439 // designates the object or function denoted by the reference, and the 4440 // expression is an lvalue unless the reference is an rvalue reference and 4441 // the expression is a function call (possibly inside parentheses). 4442 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 4443 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 4444 4445 QualType LHSCan = getCanonicalType(LHS), 4446 RHSCan = getCanonicalType(RHS); 4447 4448 // If two types are identical, they are compatible. 4449 if (LHSCan == RHSCan) 4450 return LHS; 4451 4452 // If the qualifiers are different, the types aren't compatible... mostly. 4453 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4454 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4455 if (LQuals != RQuals) { 4456 // If any of these qualifiers are different, we have a type 4457 // mismatch. 4458 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4459 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4460 return QualType(); 4461 4462 // Exactly one GC qualifier difference is allowed: __strong is 4463 // okay if the other type has no GC qualifier but is an Objective 4464 // C object pointer (i.e. implicitly strong by default). We fix 4465 // this by pretending that the unqualified type was actually 4466 // qualified __strong. 4467 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4468 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4469 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4470 4471 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4472 return QualType(); 4473 4474 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4475 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4476 } 4477 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4478 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4479 } 4480 return QualType(); 4481 } 4482 4483 // Okay, qualifiers are equal. 4484 4485 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4486 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4487 4488 // We want to consider the two function types to be the same for these 4489 // comparisons, just force one to the other. 4490 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 4491 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 4492 4493 // Same as above for arrays 4494 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 4495 LHSClass = Type::ConstantArray; 4496 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 4497 RHSClass = Type::ConstantArray; 4498 4499 // ObjCInterfaces are just specialized ObjCObjects. 4500 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 4501 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 4502 4503 // Canonicalize ExtVector -> Vector. 4504 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 4505 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 4506 4507 // If the canonical type classes don't match. 4508 if (LHSClass != RHSClass) { 4509 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 4510 // a signed integer type, or an unsigned integer type. 4511 // Compatibility is based on the underlying type, not the promotion 4512 // type. 4513 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 4514 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 4515 return RHS; 4516 } 4517 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 4518 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 4519 return LHS; 4520 } 4521 4522 return QualType(); 4523 } 4524 4525 // The canonical type classes match. 4526 switch (LHSClass) { 4527#define TYPE(Class, Base) 4528#define ABSTRACT_TYPE(Class, Base) 4529#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 4530#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4531#define DEPENDENT_TYPE(Class, Base) case Type::Class: 4532#include "clang/AST/TypeNodes.def" 4533 assert(false && "Non-canonical and dependent types shouldn't get here"); 4534 return QualType(); 4535 4536 case Type::LValueReference: 4537 case Type::RValueReference: 4538 case Type::MemberPointer: 4539 assert(false && "C++ should never be in mergeTypes"); 4540 return QualType(); 4541 4542 case Type::ObjCInterface: 4543 case Type::IncompleteArray: 4544 case Type::VariableArray: 4545 case Type::FunctionProto: 4546 case Type::ExtVector: 4547 assert(false && "Types are eliminated above"); 4548 return QualType(); 4549 4550 case Type::Pointer: 4551 { 4552 // Merge two pointer types, while trying to preserve typedef info 4553 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 4554 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 4555 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 4556 if (ResultType.isNull()) return QualType(); 4557 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4558 return LHS; 4559 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4560 return RHS; 4561 return getPointerType(ResultType); 4562 } 4563 case Type::BlockPointer: 4564 { 4565 // Merge two block pointer types, while trying to preserve typedef info 4566 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 4567 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 4568 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer); 4569 if (ResultType.isNull()) return QualType(); 4570 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4571 return LHS; 4572 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4573 return RHS; 4574 return getBlockPointerType(ResultType); 4575 } 4576 case Type::ConstantArray: 4577 { 4578 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 4579 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 4580 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 4581 return QualType(); 4582 4583 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 4584 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 4585 QualType ResultType = mergeTypes(LHSElem, RHSElem); 4586 if (ResultType.isNull()) return QualType(); 4587 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4588 return LHS; 4589 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4590 return RHS; 4591 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 4592 ArrayType::ArraySizeModifier(), 0); 4593 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 4594 ArrayType::ArraySizeModifier(), 0); 4595 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 4596 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 4597 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4598 return LHS; 4599 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4600 return RHS; 4601 if (LVAT) { 4602 // FIXME: This isn't correct! But tricky to implement because 4603 // the array's size has to be the size of LHS, but the type 4604 // has to be different. 4605 return LHS; 4606 } 4607 if (RVAT) { 4608 // FIXME: This isn't correct! But tricky to implement because 4609 // the array's size has to be the size of RHS, but the type 4610 // has to be different. 4611 return RHS; 4612 } 4613 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 4614 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 4615 return getIncompleteArrayType(ResultType, 4616 ArrayType::ArraySizeModifier(), 0); 4617 } 4618 case Type::FunctionNoProto: 4619 return mergeFunctionTypes(LHS, RHS, OfBlockPointer); 4620 case Type::Record: 4621 case Type::Enum: 4622 return QualType(); 4623 case Type::Builtin: 4624 // Only exactly equal builtin types are compatible, which is tested above. 4625 return QualType(); 4626 case Type::Complex: 4627 // Distinct complex types are incompatible. 4628 return QualType(); 4629 case Type::Vector: 4630 // FIXME: The merged type should be an ExtVector! 4631 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 4632 RHSCan->getAs<VectorType>())) 4633 return LHS; 4634 return QualType(); 4635 case Type::ObjCObject: { 4636 // Check if the types are assignment compatible. 4637 // FIXME: This should be type compatibility, e.g. whether 4638 // "LHS x; RHS x;" at global scope is legal. 4639 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 4640 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 4641 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 4642 return LHS; 4643 4644 return QualType(); 4645 } 4646 case Type::ObjCObjectPointer: { 4647 if (OfBlockPointer) { 4648 if (canAssignObjCInterfacesInBlockPointer( 4649 LHS->getAs<ObjCObjectPointerType>(), 4650 RHS->getAs<ObjCObjectPointerType>())) 4651 return LHS; 4652 return QualType(); 4653 } 4654 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 4655 RHS->getAs<ObjCObjectPointerType>())) 4656 return LHS; 4657 4658 return QualType(); 4659 } 4660 } 4661 4662 return QualType(); 4663} 4664 4665/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 4666/// 'RHS' attributes and returns the merged version; including for function 4667/// return types. 4668QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 4669 QualType LHSCan = getCanonicalType(LHS), 4670 RHSCan = getCanonicalType(RHS); 4671 // If two types are identical, they are compatible. 4672 if (LHSCan == RHSCan) 4673 return LHS; 4674 if (RHSCan->isFunctionType()) { 4675 if (!LHSCan->isFunctionType()) 4676 return QualType(); 4677 QualType OldReturnType = 4678 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 4679 QualType NewReturnType = 4680 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 4681 QualType ResReturnType = 4682 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 4683 if (ResReturnType.isNull()) 4684 return QualType(); 4685 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 4686 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 4687 // In either case, use OldReturnType to build the new function type. 4688 const FunctionType *F = LHS->getAs<FunctionType>(); 4689 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 4690 FunctionType::ExtInfo Info = getFunctionExtInfo(LHS); 4691 QualType ResultType 4692 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 4693 FPT->getNumArgs(), FPT->isVariadic(), 4694 FPT->getTypeQuals(), 4695 FPT->hasExceptionSpec(), 4696 FPT->hasAnyExceptionSpec(), 4697 FPT->getNumExceptions(), 4698 FPT->exception_begin(), 4699 Info); 4700 return ResultType; 4701 } 4702 } 4703 return QualType(); 4704 } 4705 4706 // If the qualifiers are different, the types can still be merged. 4707 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4708 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4709 if (LQuals != RQuals) { 4710 // If any of these qualifiers are different, we have a type mismatch. 4711 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4712 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4713 return QualType(); 4714 4715 // Exactly one GC qualifier difference is allowed: __strong is 4716 // okay if the other type has no GC qualifier but is an Objective 4717 // C object pointer (i.e. implicitly strong by default). We fix 4718 // this by pretending that the unqualified type was actually 4719 // qualified __strong. 4720 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4721 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4722 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4723 4724 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4725 return QualType(); 4726 4727 if (GC_L == Qualifiers::Strong) 4728 return LHS; 4729 if (GC_R == Qualifiers::Strong) 4730 return RHS; 4731 return QualType(); 4732 } 4733 4734 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 4735 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 4736 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 4737 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 4738 if (ResQT == LHSBaseQT) 4739 return LHS; 4740 if (ResQT == RHSBaseQT) 4741 return RHS; 4742 } 4743 return QualType(); 4744} 4745 4746//===----------------------------------------------------------------------===// 4747// Integer Predicates 4748//===----------------------------------------------------------------------===// 4749 4750unsigned ASTContext::getIntWidth(QualType T) { 4751 if (T->isBooleanType()) 4752 return 1; 4753 if (EnumType *ET = dyn_cast<EnumType>(T)) 4754 T = ET->getDecl()->getIntegerType(); 4755 // For builtin types, just use the standard type sizing method 4756 return (unsigned)getTypeSize(T); 4757} 4758 4759QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 4760 assert(T->isSignedIntegerType() && "Unexpected type"); 4761 4762 // Turn <4 x signed int> -> <4 x unsigned int> 4763 if (const VectorType *VTy = T->getAs<VectorType>()) 4764 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 4765 VTy->getNumElements(), VTy->isAltiVec(), VTy->isPixel()); 4766 4767 // For enums, we return the unsigned version of the base type. 4768 if (const EnumType *ETy = T->getAs<EnumType>()) 4769 T = ETy->getDecl()->getIntegerType(); 4770 4771 const BuiltinType *BTy = T->getAs<BuiltinType>(); 4772 assert(BTy && "Unexpected signed integer type"); 4773 switch (BTy->getKind()) { 4774 case BuiltinType::Char_S: 4775 case BuiltinType::SChar: 4776 return UnsignedCharTy; 4777 case BuiltinType::Short: 4778 return UnsignedShortTy; 4779 case BuiltinType::Int: 4780 return UnsignedIntTy; 4781 case BuiltinType::Long: 4782 return UnsignedLongTy; 4783 case BuiltinType::LongLong: 4784 return UnsignedLongLongTy; 4785 case BuiltinType::Int128: 4786 return UnsignedInt128Ty; 4787 default: 4788 assert(0 && "Unexpected signed integer type"); 4789 return QualType(); 4790 } 4791} 4792 4793ExternalASTSource::~ExternalASTSource() { } 4794 4795void ExternalASTSource::PrintStats() { } 4796 4797 4798//===----------------------------------------------------------------------===// 4799// Builtin Type Computation 4800//===----------------------------------------------------------------------===// 4801 4802/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 4803/// pointer over the consumed characters. This returns the resultant type. 4804static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 4805 ASTContext::GetBuiltinTypeError &Error, 4806 bool AllowTypeModifiers = true) { 4807 // Modifiers. 4808 int HowLong = 0; 4809 bool Signed = false, Unsigned = false; 4810 4811 // Read the modifiers first. 4812 bool Done = false; 4813 while (!Done) { 4814 switch (*Str++) { 4815 default: Done = true; --Str; break; 4816 case 'S': 4817 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 4818 assert(!Signed && "Can't use 'S' modifier multiple times!"); 4819 Signed = true; 4820 break; 4821 case 'U': 4822 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 4823 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 4824 Unsigned = true; 4825 break; 4826 case 'L': 4827 assert(HowLong <= 2 && "Can't have LLLL modifier"); 4828 ++HowLong; 4829 break; 4830 } 4831 } 4832 4833 QualType Type; 4834 4835 // Read the base type. 4836 switch (*Str++) { 4837 default: assert(0 && "Unknown builtin type letter!"); 4838 case 'v': 4839 assert(HowLong == 0 && !Signed && !Unsigned && 4840 "Bad modifiers used with 'v'!"); 4841 Type = Context.VoidTy; 4842 break; 4843 case 'f': 4844 assert(HowLong == 0 && !Signed && !Unsigned && 4845 "Bad modifiers used with 'f'!"); 4846 Type = Context.FloatTy; 4847 break; 4848 case 'd': 4849 assert(HowLong < 2 && !Signed && !Unsigned && 4850 "Bad modifiers used with 'd'!"); 4851 if (HowLong) 4852 Type = Context.LongDoubleTy; 4853 else 4854 Type = Context.DoubleTy; 4855 break; 4856 case 's': 4857 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 4858 if (Unsigned) 4859 Type = Context.UnsignedShortTy; 4860 else 4861 Type = Context.ShortTy; 4862 break; 4863 case 'i': 4864 if (HowLong == 3) 4865 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 4866 else if (HowLong == 2) 4867 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 4868 else if (HowLong == 1) 4869 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 4870 else 4871 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 4872 break; 4873 case 'c': 4874 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 4875 if (Signed) 4876 Type = Context.SignedCharTy; 4877 else if (Unsigned) 4878 Type = Context.UnsignedCharTy; 4879 else 4880 Type = Context.CharTy; 4881 break; 4882 case 'b': // boolean 4883 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 4884 Type = Context.BoolTy; 4885 break; 4886 case 'z': // size_t. 4887 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 4888 Type = Context.getSizeType(); 4889 break; 4890 case 'F': 4891 Type = Context.getCFConstantStringType(); 4892 break; 4893 case 'a': 4894 Type = Context.getBuiltinVaListType(); 4895 assert(!Type.isNull() && "builtin va list type not initialized!"); 4896 break; 4897 case 'A': 4898 // This is a "reference" to a va_list; however, what exactly 4899 // this means depends on how va_list is defined. There are two 4900 // different kinds of va_list: ones passed by value, and ones 4901 // passed by reference. An example of a by-value va_list is 4902 // x86, where va_list is a char*. An example of by-ref va_list 4903 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 4904 // we want this argument to be a char*&; for x86-64, we want 4905 // it to be a __va_list_tag*. 4906 Type = Context.getBuiltinVaListType(); 4907 assert(!Type.isNull() && "builtin va list type not initialized!"); 4908 if (Type->isArrayType()) { 4909 Type = Context.getArrayDecayedType(Type); 4910 } else { 4911 Type = Context.getLValueReferenceType(Type); 4912 } 4913 break; 4914 case 'V': { 4915 char *End; 4916 unsigned NumElements = strtoul(Str, &End, 10); 4917 assert(End != Str && "Missing vector size"); 4918 4919 Str = End; 4920 4921 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4922 // FIXME: Don't know what to do about AltiVec. 4923 Type = Context.getVectorType(ElementType, NumElements, false, false); 4924 break; 4925 } 4926 case 'X': { 4927 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4928 Type = Context.getComplexType(ElementType); 4929 break; 4930 } 4931 case 'P': 4932 Type = Context.getFILEType(); 4933 if (Type.isNull()) { 4934 Error = ASTContext::GE_Missing_stdio; 4935 return QualType(); 4936 } 4937 break; 4938 case 'J': 4939 if (Signed) 4940 Type = Context.getsigjmp_bufType(); 4941 else 4942 Type = Context.getjmp_bufType(); 4943 4944 if (Type.isNull()) { 4945 Error = ASTContext::GE_Missing_setjmp; 4946 return QualType(); 4947 } 4948 break; 4949 } 4950 4951 if (!AllowTypeModifiers) 4952 return Type; 4953 4954 Done = false; 4955 while (!Done) { 4956 switch (char c = *Str++) { 4957 default: Done = true; --Str; break; 4958 case '*': 4959 case '&': 4960 { 4961 // Both pointers and references can have their pointee types 4962 // qualified with an address space. 4963 char *End; 4964 unsigned AddrSpace = strtoul(Str, &End, 10); 4965 if (End != Str && AddrSpace != 0) { 4966 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 4967 Str = End; 4968 } 4969 } 4970 if (c == '*') 4971 Type = Context.getPointerType(Type); 4972 else 4973 Type = Context.getLValueReferenceType(Type); 4974 break; 4975 // FIXME: There's no way to have a built-in with an rvalue ref arg. 4976 case 'C': 4977 Type = Type.withConst(); 4978 break; 4979 case 'D': 4980 Type = Context.getVolatileType(Type); 4981 break; 4982 } 4983 } 4984 4985 return Type; 4986} 4987 4988/// GetBuiltinType - Return the type for the specified builtin. 4989QualType ASTContext::GetBuiltinType(unsigned id, 4990 GetBuiltinTypeError &Error) { 4991 const char *TypeStr = BuiltinInfo.GetTypeString(id); 4992 4993 llvm::SmallVector<QualType, 8> ArgTypes; 4994 4995 Error = GE_None; 4996 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 4997 if (Error != GE_None) 4998 return QualType(); 4999 while (TypeStr[0] && TypeStr[0] != '.') { 5000 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 5001 if (Error != GE_None) 5002 return QualType(); 5003 5004 // Do array -> pointer decay. The builtin should use the decayed type. 5005 if (Ty->isArrayType()) 5006 Ty = getArrayDecayedType(Ty); 5007 5008 ArgTypes.push_back(Ty); 5009 } 5010 5011 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 5012 "'.' should only occur at end of builtin type list!"); 5013 5014 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 5015 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 5016 return getFunctionNoProtoType(ResType); 5017 5018 // FIXME: Should we create noreturn types? 5019 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 5020 TypeStr[0] == '.', 0, false, false, 0, 0, 5021 FunctionType::ExtInfo()); 5022} 5023 5024QualType 5025ASTContext::UsualArithmeticConversionsType(QualType lhs, QualType rhs) { 5026 // Perform the usual unary conversions. We do this early so that 5027 // integral promotions to "int" can allow us to exit early, in the 5028 // lhs == rhs check. Also, for conversion purposes, we ignore any 5029 // qualifiers. For example, "const float" and "float" are 5030 // equivalent. 5031 if (lhs->isPromotableIntegerType()) 5032 lhs = getPromotedIntegerType(lhs); 5033 else 5034 lhs = lhs.getUnqualifiedType(); 5035 if (rhs->isPromotableIntegerType()) 5036 rhs = getPromotedIntegerType(rhs); 5037 else 5038 rhs = rhs.getUnqualifiedType(); 5039 5040 // If both types are identical, no conversion is needed. 5041 if (lhs == rhs) 5042 return lhs; 5043 5044 // If either side is a non-arithmetic type (e.g. a pointer), we are done. 5045 // The caller can deal with this (e.g. pointer + int). 5046 if (!lhs->isArithmeticType() || !rhs->isArithmeticType()) 5047 return lhs; 5048 5049 // At this point, we have two different arithmetic types. 5050 5051 // Handle complex types first (C99 6.3.1.8p1). 5052 if (lhs->isComplexType() || rhs->isComplexType()) { 5053 // if we have an integer operand, the result is the complex type. 5054 if (rhs->isIntegerType() || rhs->isComplexIntegerType()) { 5055 // convert the rhs to the lhs complex type. 5056 return lhs; 5057 } 5058 if (lhs->isIntegerType() || lhs->isComplexIntegerType()) { 5059 // convert the lhs to the rhs complex type. 5060 return rhs; 5061 } 5062 // This handles complex/complex, complex/float, or float/complex. 5063 // When both operands are complex, the shorter operand is converted to the 5064 // type of the longer, and that is the type of the result. This corresponds 5065 // to what is done when combining two real floating-point operands. 5066 // The fun begins when size promotion occur across type domains. 5067 // From H&S 6.3.4: When one operand is complex and the other is a real 5068 // floating-point type, the less precise type is converted, within it's 5069 // real or complex domain, to the precision of the other type. For example, 5070 // when combining a "long double" with a "double _Complex", the 5071 // "double _Complex" is promoted to "long double _Complex". 5072 int result = getFloatingTypeOrder(lhs, rhs); 5073 5074 if (result > 0) { // The left side is bigger, convert rhs. 5075 rhs = getFloatingTypeOfSizeWithinDomain(lhs, rhs); 5076 } else if (result < 0) { // The right side is bigger, convert lhs. 5077 lhs = getFloatingTypeOfSizeWithinDomain(rhs, lhs); 5078 } 5079 // At this point, lhs and rhs have the same rank/size. Now, make sure the 5080 // domains match. This is a requirement for our implementation, C99 5081 // does not require this promotion. 5082 if (lhs != rhs) { // Domains don't match, we have complex/float mix. 5083 if (lhs->isRealFloatingType()) { // handle "double, _Complex double". 5084 return rhs; 5085 } else { // handle "_Complex double, double". 5086 return lhs; 5087 } 5088 } 5089 return lhs; // The domain/size match exactly. 5090 } 5091 // Now handle "real" floating types (i.e. float, double, long double). 5092 if (lhs->isRealFloatingType() || rhs->isRealFloatingType()) { 5093 // if we have an integer operand, the result is the real floating type. 5094 if (rhs->isIntegerType()) { 5095 // convert rhs to the lhs floating point type. 5096 return lhs; 5097 } 5098 if (rhs->isComplexIntegerType()) { 5099 // convert rhs to the complex floating point type. 5100 return getComplexType(lhs); 5101 } 5102 if (lhs->isIntegerType()) { 5103 // convert lhs to the rhs floating point type. 5104 return rhs; 5105 } 5106 if (lhs->isComplexIntegerType()) { 5107 // convert lhs to the complex floating point type. 5108 return getComplexType(rhs); 5109 } 5110 // We have two real floating types, float/complex combos were handled above. 5111 // Convert the smaller operand to the bigger result. 5112 int result = getFloatingTypeOrder(lhs, rhs); 5113 if (result > 0) // convert the rhs 5114 return lhs; 5115 assert(result < 0 && "illegal float comparison"); 5116 return rhs; // convert the lhs 5117 } 5118 if (lhs->isComplexIntegerType() || rhs->isComplexIntegerType()) { 5119 // Handle GCC complex int extension. 5120 const ComplexType *lhsComplexInt = lhs->getAsComplexIntegerType(); 5121 const ComplexType *rhsComplexInt = rhs->getAsComplexIntegerType(); 5122 5123 if (lhsComplexInt && rhsComplexInt) { 5124 if (getIntegerTypeOrder(lhsComplexInt->getElementType(), 5125 rhsComplexInt->getElementType()) >= 0) 5126 return lhs; // convert the rhs 5127 return rhs; 5128 } else if (lhsComplexInt && rhs->isIntegerType()) { 5129 // convert the rhs to the lhs complex type. 5130 return lhs; 5131 } else if (rhsComplexInt && lhs->isIntegerType()) { 5132 // convert the lhs to the rhs complex type. 5133 return rhs; 5134 } 5135 } 5136 // Finally, we have two differing integer types. 5137 // The rules for this case are in C99 6.3.1.8 5138 int compare = getIntegerTypeOrder(lhs, rhs); 5139 bool lhsSigned = lhs->isSignedIntegerType(), 5140 rhsSigned = rhs->isSignedIntegerType(); 5141 QualType destType; 5142 if (lhsSigned == rhsSigned) { 5143 // Same signedness; use the higher-ranked type 5144 destType = compare >= 0 ? lhs : rhs; 5145 } else if (compare != (lhsSigned ? 1 : -1)) { 5146 // The unsigned type has greater than or equal rank to the 5147 // signed type, so use the unsigned type 5148 destType = lhsSigned ? rhs : lhs; 5149 } else if (getIntWidth(lhs) != getIntWidth(rhs)) { 5150 // The two types are different widths; if we are here, that 5151 // means the signed type is larger than the unsigned type, so 5152 // use the signed type. 5153 destType = lhsSigned ? lhs : rhs; 5154 } else { 5155 // The signed type is higher-ranked than the unsigned type, 5156 // but isn't actually any bigger (like unsigned int and long 5157 // on most 32-bit systems). Use the unsigned type corresponding 5158 // to the signed type. 5159 destType = getCorrespondingUnsignedType(lhsSigned ? lhs : rhs); 5160 } 5161 return destType; 5162} 5163