ASTContext.cpp revision 5e301007e31e14c8ff647288e1b8bd8dbf8a5fe4
1ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com//===--- ASTContext.cpp - Context to hold long-lived AST nodes ------------===// 2ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com// 3ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com// The LLVM Compiler Infrastructure 4ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com// 5ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com// This file is distributed under the University of Illinois Open Source 6ac10a2d039c5d52eed66e27cbbc503ab523c1cd5reed@google.com// License. See LICENSE.TXT for details. 7ac10a2d039c5d52eed66e27cbbc503ab523c1cd5reed@google.com// 8ac10a2d039c5d52eed66e27cbbc503ab523c1cd5reed@google.com//===----------------------------------------------------------------------===// 9ac10a2d039c5d52eed66e27cbbc503ab523c1cd5reed@google.com// 10ac10a2d039c5d52eed66e27cbbc503ab523c1cd5reed@google.com// This file implements the ASTContext interface. 11ac10a2d039c5d52eed66e27cbbc503ab523c1cd5reed@google.com// 12ac10a2d039c5d52eed66e27cbbc503ab523c1cd5reed@google.com//===----------------------------------------------------------------------===// 13ac10a2d039c5d52eed66e27cbbc503ab523c1cd5reed@google.com 14b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon#include "clang/AST/ASTContext.h" 15b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon#include "clang/AST/DeclCXX.h" 16ded4f4b163f5aa19c22c871178c55ecb34623846bsalomon@google.com#include "clang/AST/DeclObjC.h" 17b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon#include "clang/AST/DeclTemplate.h" 18b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon#include "clang/AST/Expr.h" 19b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon#include "clang/AST/RecordLayout.h" 20ac10a2d039c5d52eed66e27cbbc503ab523c1cd5reed@google.com#include "clang/Basic/TargetInfo.h" 21641f8b19a6799b6d73ac17b9c2d2f8a5e6f5ad4drobertphillips@google.com#include "llvm/ADT/StringExtras.h" 22ded4f4b163f5aa19c22c871178c55ecb34623846bsalomon@google.com#include "llvm/Bitcode/Serialize.h" 23a0b40280a49a8a43af7929ead3b3489951c58501commit-bot@chromium.org#include "llvm/Bitcode/Deserialize.h" 24ded4f4b163f5aa19c22c871178c55ecb34623846bsalomon@google.com#include "llvm/Support/MathExtras.h" 25471d471dcd7422e5dd9c822c1092b2ba4721dcfebsalomon@google.com 261c13c9668a889e56a0c85b51b9f28139c25b76ffbsalomon@google.comusing namespace clang; 27471d471dcd7422e5dd9c822c1092b2ba4721dcfebsalomon@google.com 281c13c9668a889e56a0c85b51b9f28139c25b76ffbsalomon@google.comenum FloatingRank { 291c13c9668a889e56a0c85b51b9f28139c25b76ffbsalomon@google.com FloatRank, DoubleRank, LongDoubleRank 3055e4a2005eae1e4f677ec145c577c615a63cf05dbsalomon@google.com}; 3155e4a2005eae1e4f677ec145c577c615a63cf05dbsalomon@google.com 3255e4a2005eae1e4f677ec145c577c615a63cf05dbsalomon@google.comASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 3355e4a2005eae1e4f677ec145c577c615a63cf05dbsalomon@google.com TargetInfo &t, 3455e4a2005eae1e4f677ec145c577c615a63cf05dbsalomon@google.com IdentifierTable &idents, SelectorTable &sels, 3555e4a2005eae1e4f677ec145c577c615a63cf05dbsalomon@google.com bool FreeMem, unsigned size_reserve) : 3655e4a2005eae1e4f677ec145c577c615a63cf05dbsalomon@google.com CFConstantStringTypeDecl(0), ObjCFastEnumerationStateTypeDecl(0), 3755e4a2005eae1e4f677ec145c577c615a63cf05dbsalomon@google.com SourceMgr(SM), LangOpts(LOpts), FreeMemory(FreeMem), Target(t), 3807d3a6575b86845ded0d4bd785aec8f4c2cc99dcskia.committer@gmail.com Idents(idents), Selectors(sels) 39ac10a2d039c5d52eed66e27cbbc503ab523c1cd5reed@google.com{ 40ac10a2d039c5d52eed66e27cbbc503ab523c1cd5reed@google.com if (size_reserve > 0) Types.reserve(size_reserve); 41ac10a2d039c5d52eed66e27cbbc503ab523c1cd5reed@google.com InitBuiltinTypes(); 4286afc2ae27fec84c01eb0e81a32766bdaf67dca8bsalomon@google.com BuiltinInfo.InitializeBuiltins(idents, Target, LangOpts.Freestanding); 4386afc2ae27fec84c01eb0e81a32766bdaf67dca8bsalomon@google.com TUDecl = TranslationUnitDecl::Create(*this); 4486afc2ae27fec84c01eb0e81a32766bdaf67dca8bsalomon@google.com} 456e4e65066a7c0dbc9bfbfe4b8f5d49c3d8a79b59bsalomon@google.com 4686afc2ae27fec84c01eb0e81a32766bdaf67dca8bsalomon@google.comASTContext::~ASTContext() { 4786afc2ae27fec84c01eb0e81a32766bdaf67dca8bsalomon@google.com // Deallocate all the types. 4886afc2ae27fec84c01eb0e81a32766bdaf67dca8bsalomon@google.com while (!Types.empty()) { 4986afc2ae27fec84c01eb0e81a32766bdaf67dca8bsalomon@google.com Types.back()->Destroy(*this); 5086afc2ae27fec84c01eb0e81a32766bdaf67dca8bsalomon@google.com Types.pop_back(); 516e4e65066a7c0dbc9bfbfe4b8f5d49c3d8a79b59bsalomon@google.com } 52471d471dcd7422e5dd9c822c1092b2ba4721dcfebsalomon@google.com 531c13c9668a889e56a0c85b51b9f28139c25b76ffbsalomon@google.com { 54ac10a2d039c5d52eed66e27cbbc503ab523c1cd5reed@google.com llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 55ac10a2d039c5d52eed66e27cbbc503ab523c1cd5reed@google.com I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); 56ac10a2d039c5d52eed66e27cbbc503ab523c1cd5reed@google.com while (I != E) { 5786afc2ae27fec84c01eb0e81a32766bdaf67dca8bsalomon@google.com ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second); 5855e4a2005eae1e4f677ec145c577c615a63cf05dbsalomon@google.com delete R; 5955e4a2005eae1e4f677ec145c577c615a63cf05dbsalomon@google.com } 6086afc2ae27fec84c01eb0e81a32766bdaf67dca8bsalomon@google.com } 6186afc2ae27fec84c01eb0e81a32766bdaf67dca8bsalomon@google.com 6286afc2ae27fec84c01eb0e81a32766bdaf67dca8bsalomon@google.com { 6386afc2ae27fec84c01eb0e81a32766bdaf67dca8bsalomon@google.com llvm::DenseMap<const ObjCInterfaceDecl*, const ASTRecordLayout*>::iterator 646e4e65066a7c0dbc9bfbfe4b8f5d49c3d8a79b59bsalomon@google.com I = ASTObjCInterfaces.begin(), E = ASTObjCInterfaces.end(); 6555e4a2005eae1e4f677ec145c577c615a63cf05dbsalomon@google.com while (I != E) { 6655e4a2005eae1e4f677ec145c577c615a63cf05dbsalomon@google.com ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second); 6755e4a2005eae1e4f677ec145c577c615a63cf05dbsalomon@google.com delete R; 6886afc2ae27fec84c01eb0e81a32766bdaf67dca8bsalomon@google.com } 691267fbd95290f58443652ca8d947bde50b212618robertphillips@google.com } 7097805382d89b717de3355312a79a957ea4a864c9bsalomon@google.com 71a8916ffd90c04dc6cc1fb9ba94af2ff950284fadcommit-bot@chromium.org { 72a8916ffd90c04dc6cc1fb9ba94af2ff950284fadcommit-bot@chromium.org llvm::DenseMap<const ObjCInterfaceDecl*, const RecordDecl*>::iterator 73a8916ffd90c04dc6cc1fb9ba94af2ff950284fadcommit-bot@chromium.org I = ASTRecordForInterface.begin(), E = ASTRecordForInterface.end(); 7486afc2ae27fec84c01eb0e81a32766bdaf67dca8bsalomon@google.com while (I != E) { 75b75b0a0b8492e14c7728e0a0881f87dc64ce60f9jvanverth@google.com RecordDecl *R = const_cast<RecordDecl*>((I++)->second); 7697805382d89b717de3355312a79a957ea4a864c9bsalomon@google.com R->Destroy(*this); 77fd03d4a829efe2d77a712fd991927c55f59a2ffecommit-bot@chromium.org } 78c82a8b7aa4ec19fba508c394920a9e88d3e5bd12robertphillips@google.com } 7956ce48ade325f6f49acb0da31d6252806e4ed7efrobertphillips@google.com 8028361fad1054d59ed4e6a320c7a8b8782a1487c7commit-bot@chromium.org TUDecl->Destroy(*this); 8128361fad1054d59ed4e6a320c7a8b8782a1487c7commit-bot@chromium.org} 8228361fad1054d59ed4e6a320c7a8b8782a1487c7commit-bot@chromium.org 830b335c1ac100aeacf79a4c98a052286fd46661e7bsalomon@google.comvoid ASTContext::PrintStats() const { 84eb85117c05471e1a55ce387cbc38279f857a4584bsalomon@google.com fprintf(stderr, "*** AST Context Stats:\n"); 85eb85117c05471e1a55ce387cbc38279f857a4584bsalomon@google.com fprintf(stderr, " %d types total.\n", (int)Types.size()); 8697805382d89b717de3355312a79a957ea4a864c9bsalomon@google.com unsigned NumBuiltin = 0, NumPointer = 0, NumArray = 0, NumFunctionP = 0; 8702ddc8b85ace91b15feb329a6a1d5d62b2b846c6bsalomon@google.com unsigned NumVector = 0, NumComplex = 0, NumBlockPointer = 0; 8802ddc8b85ace91b15feb329a6a1d5d62b2b846c6bsalomon@google.com unsigned NumFunctionNP = 0, NumTypeName = 0, NumTagged = 0, NumReference = 0; 89ac10a2d039c5d52eed66e27cbbc503ab523c1cd5reed@google.com unsigned NumMemberPointer = 0; 90a4f6b10818819a16bc94738e2eda42dfec332c43bsalomon@google.com 91ded4f4b163f5aa19c22c871178c55ecb34623846bsalomon@google.com unsigned NumTagStruct = 0, NumTagUnion = 0, NumTagEnum = 0, NumTagClass = 0; 92ded4f4b163f5aa19c22c871178c55ecb34623846bsalomon@google.com unsigned NumObjCInterfaces = 0, NumObjCQualifiedInterfaces = 0; 93ded4f4b163f5aa19c22c871178c55ecb34623846bsalomon@google.com unsigned NumObjCQualifiedIds = 0; 94ded4f4b163f5aa19c22c871178c55ecb34623846bsalomon@google.com unsigned NumTypeOfTypes = 0, NumTypeOfExprTypes = 0; 95ded4f4b163f5aa19c22c871178c55ecb34623846bsalomon@google.com 96116ad84d3126b0db22b2312ca59ed70e5c56f6fcbsalomon@google.com for (unsigned i = 0, e = Types.size(); i != e; ++i) { 9732184d81629e39809bb9e915286d8fe971a8ed68commit-bot@chromium.org Type *T = Types[i]; 989b62aa156bcf1db6f11af9302bf8bb8ef2567142commit-bot@chromium.org if (isa<BuiltinType>(T)) 99a4f6b10818819a16bc94738e2eda42dfec332c43bsalomon@google.com ++NumBuiltin; 100a4f6b10818819a16bc94738e2eda42dfec332c43bsalomon@google.com else if (isa<PointerType>(T)) 101b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon ++NumPointer; 102d62e88e5af39347a8fc2a5abdf5feb67d7ea256dbsalomon@google.com else if (isa<BlockPointerType>(T)) 103b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon ++NumBlockPointer; 104b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon else if (isa<ReferenceType>(T)) 10545725db1d82615d43408ec488549aec6218f80e4bsalomon ++NumReference; 10645725db1d82615d43408ec488549aec6218f80e4bsalomon else if (isa<MemberPointerType>(T)) 107b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon ++NumMemberPointer; 108b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon else if (isa<ComplexType>(T)) 109b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon ++NumComplex; 110b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon else if (isa<ArrayType>(T)) 111b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon ++NumArray; 11245725db1d82615d43408ec488549aec6218f80e4bsalomon else if (isa<VectorType>(T)) 11345725db1d82615d43408ec488549aec6218f80e4bsalomon ++NumVector; 114ac10a2d039c5d52eed66e27cbbc503ab523c1cd5reed@google.com else if (isa<FunctionNoProtoType>(T)) 115ac10a2d039c5d52eed66e27cbbc503ab523c1cd5reed@google.com ++NumFunctionNP; 116a0b40280a49a8a43af7929ead3b3489951c58501commit-bot@chromium.org else if (isa<FunctionProtoType>(T)) 11745725db1d82615d43408ec488549aec6218f80e4bsalomon ++NumFunctionP; 118b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon else if (isa<TypedefType>(T)) 119b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon ++NumTypeName; 1205f74cf8c49701f514b69dc6f1a8b5c0ffd78af0asugoi@google.com else if (TagType *TT = dyn_cast<TagType>(T)) { 121b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon ++NumTagged; 122b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon switch (TT->getDecl()->getTagKind()) { 123b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon default: assert(0 && "Unknown tagged type!"); 12445725db1d82615d43408ec488549aec6218f80e4bsalomon case TagDecl::TK_struct: ++NumTagStruct; break; 125ded4f4b163f5aa19c22c871178c55ecb34623846bsalomon@google.com case TagDecl::TK_union: ++NumTagUnion; break; 126ded4f4b163f5aa19c22c871178c55ecb34623846bsalomon@google.com case TagDecl::TK_class: ++NumTagClass; break; 12732184d81629e39809bb9e915286d8fe971a8ed68commit-bot@chromium.org case TagDecl::TK_enum: ++NumTagEnum; break; 12845725db1d82615d43408ec488549aec6218f80e4bsalomon } 129b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon } else if (isa<ObjCInterfaceType>(T)) 130b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon ++NumObjCInterfaces; 131c4dc0ad8e252a7e30d19b47d3d0d9f2c69faf854commit-bot@chromium.org else if (isa<ObjCQualifiedInterfaceType>(T)) 132b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon ++NumObjCQualifiedInterfaces; 133b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon else if (isa<ObjCQualifiedIdType>(T)) 134b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon ++NumObjCQualifiedIds; 135b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon else if (isa<TypeOfType>(T)) 13645725db1d82615d43408ec488549aec6218f80e4bsalomon ++NumTypeOfTypes; 137c4dc0ad8e252a7e30d19b47d3d0d9f2c69faf854commit-bot@chromium.org else if (isa<TypeOfExprType>(T)) 138c4dc0ad8e252a7e30d19b47d3d0d9f2c69faf854commit-bot@chromium.org ++NumTypeOfExprTypes; 1399b62aa156bcf1db6f11af9302bf8bb8ef2567142commit-bot@chromium.org else { 140b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon QualType(T, 0).dump(); 14145725db1d82615d43408ec488549aec6218f80e4bsalomon assert(0 && "Unknown type!"); 142b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon } 143b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon } 144b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon 145b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon fprintf(stderr, " %d builtin types\n", NumBuiltin); 146b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon fprintf(stderr, " %d pointer types\n", NumPointer); 147b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon fprintf(stderr, " %d block pointer types\n", NumBlockPointer); 148b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon fprintf(stderr, " %d reference types\n", NumReference); 149b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon fprintf(stderr, " %d member pointer types\n", NumMemberPointer); 150b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon fprintf(stderr, " %d complex types\n", NumComplex); 151b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon fprintf(stderr, " %d array types\n", NumArray); 152b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon fprintf(stderr, " %d vector types\n", NumVector); 153b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon fprintf(stderr, " %d function types with proto\n", NumFunctionP); 154b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon fprintf(stderr, " %d function types with no proto\n", NumFunctionNP); 155b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon fprintf(stderr, " %d typename (typedef) types\n", NumTypeName); 156b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon fprintf(stderr, " %d tagged types\n", NumTagged); 157b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon fprintf(stderr, " %d struct types\n", NumTagStruct); 158b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon fprintf(stderr, " %d union types\n", NumTagUnion); 159b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon fprintf(stderr, " %d class types\n", NumTagClass); 160b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon fprintf(stderr, " %d enum types\n", NumTagEnum); 161b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon fprintf(stderr, " %d interface types\n", NumObjCInterfaces); 16245725db1d82615d43408ec488549aec6218f80e4bsalomon fprintf(stderr, " %d protocol qualified interface types\n", 1639b62aa156bcf1db6f11af9302bf8bb8ef2567142commit-bot@chromium.org NumObjCQualifiedInterfaces); 1649b62aa156bcf1db6f11af9302bf8bb8ef2567142commit-bot@chromium.org fprintf(stderr, " %d protocol qualified id types\n", 16528361fad1054d59ed4e6a320c7a8b8782a1487c7commit-bot@chromium.org NumObjCQualifiedIds); 166a0b40280a49a8a43af7929ead3b3489951c58501commit-bot@chromium.org fprintf(stderr, " %d typeof types\n", NumTypeOfTypes); 16745725db1d82615d43408ec488549aec6218f80e4bsalomon fprintf(stderr, " %d typeof exprs\n", NumTypeOfExprTypes); 168b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon 169b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon fprintf(stderr, "Total bytes = %d\n", int(NumBuiltin*sizeof(BuiltinType)+ 170b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon NumPointer*sizeof(PointerType)+NumArray*sizeof(ArrayType)+ 171b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon NumComplex*sizeof(ComplexType)+NumVector*sizeof(VectorType)+ 172b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon NumMemberPointer*sizeof(MemberPointerType)+ 173b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon NumFunctionP*sizeof(FunctionProtoType)+ 174c82a8b7aa4ec19fba508c394920a9e88d3e5bd12robertphillips@google.com NumFunctionNP*sizeof(FunctionNoProtoType)+ 175b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon NumTypeName*sizeof(TypedefType)+NumTagged*sizeof(TagType)+ 17645725db1d82615d43408ec488549aec6218f80e4bsalomon NumTypeOfTypes*sizeof(TypeOfType)+NumTypeOfExprTypes*sizeof(TypeOfExprType))); 1770b335c1ac100aeacf79a4c98a052286fd46661e7bsalomon@google.com} 1780b335c1ac100aeacf79a4c98a052286fd46661e7bsalomon@google.com 179a0b40280a49a8a43af7929ead3b3489951c58501commit-bot@chromium.org 18045725db1d82615d43408ec488549aec6218f80e4bsalomonvoid ASTContext::InitBuiltinType(QualType &R, BuiltinType::Kind K) { 181b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon Types.push_back((R = QualType(new (*this,8) BuiltinType(K),0)).getTypePtr()); 182b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon} 183b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon 184b3e3a955b6628acc540ef14854b57abb089e62dfbsalomonvoid ASTContext::InitBuiltinTypes() { 185b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon assert(VoidTy.isNull() && "Context reinitialized?"); 186b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon 187b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon // C99 6.2.5p19. 188b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon InitBuiltinType(VoidTy, BuiltinType::Void); 18945725db1d82615d43408ec488549aec6218f80e4bsalomon 19045725db1d82615d43408ec488549aec6218f80e4bsalomon // C99 6.2.5p2. 191116ad84d3126b0db22b2312ca59ed70e5c56f6fcbsalomon@google.com InitBuiltinType(BoolTy, BuiltinType::Bool); 192116ad84d3126b0db22b2312ca59ed70e5c56f6fcbsalomon@google.com // C99 6.2.5p3. 193f0480b1e697dcaee8b4004ca5b494917c939cde7bsalomon if (Target.isCharSigned()) 194f0480b1e697dcaee8b4004ca5b494917c939cde7bsalomon InitBuiltinType(CharTy, BuiltinType::Char_S); 195f0480b1e697dcaee8b4004ca5b494917c939cde7bsalomon else 196f0480b1e697dcaee8b4004ca5b494917c939cde7bsalomon InitBuiltinType(CharTy, BuiltinType::Char_U); 197f0480b1e697dcaee8b4004ca5b494917c939cde7bsalomon // C99 6.2.5p4. 19825fb21f5df904c6f111bbf8f07e6a6c339416d09bsalomon@google.com InitBuiltinType(SignedCharTy, BuiltinType::SChar); 19974749cd45c29b4f5300e2518f2c2c765ce8ae208bsalomon@google.com InitBuiltinType(ShortTy, BuiltinType::Short); 200fd03d4a829efe2d77a712fd991927c55f59a2ffecommit-bot@chromium.org InitBuiltinType(IntTy, BuiltinType::Int); 201fd03d4a829efe2d77a712fd991927c55f59a2ffecommit-bot@chromium.org InitBuiltinType(LongTy, BuiltinType::Long); 2020406b9e1faee06c6ecb2732a1bcf3b0e53104e07bsalomon@google.com InitBuiltinType(LongLongTy, BuiltinType::LongLong); 20332184d81629e39809bb9e915286d8fe971a8ed68commit-bot@chromium.org 20432184d81629e39809bb9e915286d8fe971a8ed68commit-bot@chromium.org // C99 6.2.5p6. 20532184d81629e39809bb9e915286d8fe971a8ed68commit-bot@chromium.org InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 206c4dc0ad8e252a7e30d19b47d3d0d9f2c69faf854commit-bot@chromium.org InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 207b85a0aab6905af8b329539b7573a7555b727d5e5cdalton InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 208b85a0aab6905af8b329539b7573a7555b727d5e5cdalton InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 209b85a0aab6905af8b329539b7573a7555b727d5e5cdalton InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 210b85a0aab6905af8b329539b7573a7555b727d5e5cdalton 21132184d81629e39809bb9e915286d8fe971a8ed68commit-bot@chromium.org // C99 6.2.5p10. 212a63389843dd18003382d61c2e4610af09ed07d38jvanverth@google.com InitBuiltinType(FloatTy, BuiltinType::Float); 21325fb21f5df904c6f111bbf8f07e6a6c339416d09bsalomon@google.com InitBuiltinType(DoubleTy, BuiltinType::Double); 21413f1b6f1569bb5c639ca762f6b153133173c6295bsalomon@google.com InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 21513f1b6f1569bb5c639ca762f6b153133173c6295bsalomon@google.com 21613f1b6f1569bb5c639ca762f6b153133173c6295bsalomon@google.com if (LangOpts.CPlusPlus) // C++ 3.9.1p5 21713f1b6f1569bb5c639ca762f6b153133173c6295bsalomon@google.com InitBuiltinType(WCharTy, BuiltinType::WChar); 21813f1b6f1569bb5c639ca762f6b153133173c6295bsalomon@google.com else // C99 219bcdbbe61e1a3f89545b2c1461164f0f8bf5f0797bsalomon@google.com WCharTy = getFromTargetType(Target.getWCharType()); 22013f1b6f1569bb5c639ca762f6b153133173c6295bsalomon@google.com 221bcdbbe61e1a3f89545b2c1461164f0f8bf5f0797bsalomon@google.com // Placeholder type for functions. 22213f1b6f1569bb5c639ca762f6b153133173c6295bsalomon@google.com InitBuiltinType(OverloadTy, BuiltinType::Overload); 22313f1b6f1569bb5c639ca762f6b153133173c6295bsalomon@google.com 22413f1b6f1569bb5c639ca762f6b153133173c6295bsalomon@google.com // Placeholder type for type-dependent expressions whose type is 22513f1b6f1569bb5c639ca762f6b153133173c6295bsalomon@google.com // completely unknown. No code should ever check a type against 22602ddc8b85ace91b15feb329a6a1d5d62b2b846c6bsalomon@google.com // DependentTy and users should never see it; however, it is here to 227b75b0a0b8492e14c7728e0a0881f87dc64ce60f9jvanverth@google.com // help diagnose failures to properly check for type-dependent 22802ddc8b85ace91b15feb329a6a1d5d62b2b846c6bsalomon@google.com // expressions. 229116ad84d3126b0db22b2312ca59ed70e5c56f6fcbsalomon@google.com InitBuiltinType(DependentTy, BuiltinType::Dependent); 230116ad84d3126b0db22b2312ca59ed70e5c56f6fcbsalomon@google.com 231116ad84d3126b0db22b2312ca59ed70e5c56f6fcbsalomon@google.com // C99 6.2.5p11. 232116ad84d3126b0db22b2312ca59ed70e5c56f6fcbsalomon@google.com FloatComplexTy = getComplexType(FloatTy); 233116ad84d3126b0db22b2312ca59ed70e5c56f6fcbsalomon@google.com DoubleComplexTy = getComplexType(DoubleTy); 234116ad84d3126b0db22b2312ca59ed70e5c56f6fcbsalomon@google.com LongDoubleComplexTy = getComplexType(LongDoubleTy); 235116ad84d3126b0db22b2312ca59ed70e5c56f6fcbsalomon@google.com 236116ad84d3126b0db22b2312ca59ed70e5c56f6fcbsalomon@google.com BuiltinVaListType = QualType(); 237116ad84d3126b0db22b2312ca59ed70e5c56f6fcbsalomon@google.com ObjCIdType = QualType(); 238d62e88e5af39347a8fc2a5abdf5feb67d7ea256dbsalomon@google.com IdStructType = 0; 23902ddc8b85ace91b15feb329a6a1d5d62b2b846c6bsalomon@google.com ObjCClassType = QualType(); 2402a05de0c049a8648942a55016126a1f92e1c14d6commit-bot@chromium.org ClassStructType = 0; 2412a05de0c049a8648942a55016126a1f92e1c14d6commit-bot@chromium.org 242a3baf3be0e2a3128fb73bd41d40d130f75a4dc86commit-bot@chromium.org ObjCConstantStringType = QualType(); 243d62e88e5af39347a8fc2a5abdf5feb67d7ea256dbsalomon@google.com 244d62e88e5af39347a8fc2a5abdf5feb67d7ea256dbsalomon@google.com // void * type 245d62e88e5af39347a8fc2a5abdf5feb67d7ea256dbsalomon@google.com VoidPtrTy = getPointerType(VoidTy); 2461c13c9668a889e56a0c85b51b9f28139c25b76ffbsalomon@google.com} 247838f62db0a77487f6732ed13a0972a1e646ae16absalomon 248838f62db0a77487f6732ed13a0972a1e646ae16absalomon//===----------------------------------------------------------------------===// 249838f62db0a77487f6732ed13a0972a1e646ae16absalomon// Type Sizing and Analysis 25086afc2ae27fec84c01eb0e81a32766bdaf67dca8bsalomon@google.com//===----------------------------------------------------------------------===// 251ac10a2d039c5d52eed66e27cbbc503ab523c1cd5reed@google.com 252a4f6b10818819a16bc94738e2eda42dfec332c43bsalomon@google.com/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 253ded4f4b163f5aa19c22c871178c55ecb34623846bsalomon@google.com/// scalar floating point type. 254ded4f4b163f5aa19c22c871178c55ecb34623846bsalomon@google.comconst llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 255b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon const BuiltinType *BT = T->getAsBuiltinType(); 256b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon assert(BT && "Not a floating point type!"); 257b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon switch (BT->getKind()) { 258b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon default: assert(0 && "Not a floating point type!"); 259b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon case BuiltinType::Float: return Target.getFloatFormat(); 260b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon case BuiltinType::Double: return Target.getDoubleFormat(); 261b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 262b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon } 263b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon} 264934c570297c1b1f99cb4ca8d012d468a7eddf73fbsalomon@google.com 265116ad84d3126b0db22b2312ca59ed70e5c56f6fcbsalomon@google.com/// getDeclAlign - Return a conservative estimate of the alignment of the 2664b90c62dfcda5866808ceedee46358b3d9792c93bsalomon@google.com/// specified decl. Note that bitfields do not have a valid alignment, so 267a4f6b10818819a16bc94738e2eda42dfec332c43bsalomon@google.com/// this method will assert on them. 268bce3d6dbb91c3e67f1010556c2b8aaf6d7a49267bsalomonunsigned ASTContext::getDeclAlignInBytes(const Decl *D) { 269ded4f4b163f5aa19c22c871178c55ecb34623846bsalomon@google.com unsigned Align = Target.getCharWidth(); 27032184d81629e39809bb9e915286d8fe971a8ed68commit-bot@chromium.org 2719b62aa156bcf1db6f11af9302bf8bb8ef2567142commit-bot@chromium.org if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 2724b90c62dfcda5866808ceedee46358b3d9792c93bsalomon@google.com Align = std::max(Align, AA->getAlignment()); 2734b90c62dfcda5866808ceedee46358b3d9792c93bsalomon@google.com 274bce3d6dbb91c3e67f1010556c2b8aaf6d7a49267bsalomon if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 2754b90c62dfcda5866808ceedee46358b3d9792c93bsalomon@google.com QualType T = VD->getType(); 276116ad84d3126b0db22b2312ca59ed70e5c56f6fcbsalomon@google.com // Incomplete or function types default to 1. 2774b90c62dfcda5866808ceedee46358b3d9792c93bsalomon@google.com if (!T->isIncompleteType() && !T->isFunctionType()) { 278ac10a2d039c5d52eed66e27cbbc503ab523c1cd5reed@google.com while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 279b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon T = cast<ArrayType>(T)->getElementType(); 280b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon 281b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 282b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon } 283b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon } 284b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon 285b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon return Align / Target.getCharWidth(); 286b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon} 287b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon 288b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon/// getTypeSize - Return the size of the specified type, in bits. This method 289b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon/// does not work on incomplete types. 290b3e3a955b6628acc540ef14854b57abb089e62dfbsalomonstd::pair<uint64_t, unsigned> 291b3e3a955b6628acc540ef14854b57abb089e62dfbsalomonASTContext::getTypeInfo(const Type *T) { 292b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon T = getCanonicalType(T); 293b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon uint64_t Width=0; 294b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon unsigned Align=8; 295b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon switch (T->getTypeClass()) { 296b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon#define TYPE(Class, Base) 297b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon#define ABSTRACT_TYPE(Class, Base) 298b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 299b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon#define DEPENDENT_TYPE(Class, Base) case Type::Class: 300b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon#include "clang/AST/TypeNodes.def" 30186afc2ae27fec84c01eb0e81a32766bdaf67dca8bsalomon@google.com assert(false && "Should not see non-canonical or dependent types"); 302d62e88e5af39347a8fc2a5abdf5feb67d7ea256dbsalomon@google.com break; 303d62e88e5af39347a8fc2a5abdf5feb67d7ea256dbsalomon@google.com 304d62e88e5af39347a8fc2a5abdf5feb67d7ea256dbsalomon@google.com case Type::FunctionNoProto: 305d62e88e5af39347a8fc2a5abdf5feb67d7ea256dbsalomon@google.com case Type::FunctionProto: 306d62e88e5af39347a8fc2a5abdf5feb67d7ea256dbsalomon@google.com case Type::IncompleteArray: 307934c570297c1b1f99cb4ca8d012d468a7eddf73fbsalomon@google.com assert(0 && "Incomplete types have no size!"); 308b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon case Type::VariableArray: 309b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon assert(0 && "VLAs not implemented yet!"); 310b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon case Type::ConstantArray: { 311b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 312934c570297c1b1f99cb4ca8d012d468a7eddf73fbsalomon@google.com 31325fb21f5df904c6f111bbf8f07e6a6c339416d09bsalomon@google.com std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 314b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon Width = EltInfo.first*CAT->getSize().getZExtValue(); 315b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon Align = EltInfo.second; 316b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon break; 317b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon } 31825fb21f5df904c6f111bbf8f07e6a6c339416d09bsalomon@google.com case Type::ExtVector: 31925fb21f5df904c6f111bbf8f07e6a6c339416d09bsalomon@google.com case Type::Vector: { 32025fb21f5df904c6f111bbf8f07e6a6c339416d09bsalomon@google.com std::pair<uint64_t, unsigned> EltInfo = 321b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon getTypeInfo(cast<VectorType>(T)->getElementType()); 322b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon Width = EltInfo.first*cast<VectorType>(T)->getNumElements(); 32325fb21f5df904c6f111bbf8f07e6a6c339416d09bsalomon@google.com Align = Width; 324a55847ba22ae4a673af022e7d88404e080195464bsalomon@google.com // If the alignment is not a power of 2, round up to the next power of 2. 325b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon // This happens for non-power-of-2 length vectors. 3262a05de0c049a8648942a55016126a1f92e1c14d6commit-bot@chromium.org // FIXME: this should probably be a target property. 327b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon Align = 1 << llvm::Log2_32_Ceil(Align); 328b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon break; 329b3e3a955b6628acc540ef14854b57abb089e62dfbsalomon } 330c82a8b7aa4ec19fba508c394920a9e88d3e5bd12robertphillips@google.com 33186afc2ae27fec84c01eb0e81a32766bdaf67dca8bsalomon@google.com case Type::Builtin: 332ac10a2d039c5d52eed66e27cbbc503ab523c1cd5reed@google.com switch (cast<BuiltinType>(T)->getKind()) { 333ac10a2d039c5d52eed66e27cbbc503ab523c1cd5reed@google.com default: assert(0 && "Unknown builtin type!"); 334ac10a2d039c5d52eed66e27cbbc503ab523c1cd5reed@google.com case BuiltinType::Void: 335 assert(0 && "Incomplete types have no size!"); 336 case BuiltinType::Bool: 337 Width = Target.getBoolWidth(); 338 Align = Target.getBoolAlign(); 339 break; 340 case BuiltinType::Char_S: 341 case BuiltinType::Char_U: 342 case BuiltinType::UChar: 343 case BuiltinType::SChar: 344 Width = Target.getCharWidth(); 345 Align = Target.getCharAlign(); 346 break; 347 case BuiltinType::WChar: 348 Width = Target.getWCharWidth(); 349 Align = Target.getWCharAlign(); 350 break; 351 case BuiltinType::UShort: 352 case BuiltinType::Short: 353 Width = Target.getShortWidth(); 354 Align = Target.getShortAlign(); 355 break; 356 case BuiltinType::UInt: 357 case BuiltinType::Int: 358 Width = Target.getIntWidth(); 359 Align = Target.getIntAlign(); 360 break; 361 case BuiltinType::ULong: 362 case BuiltinType::Long: 363 Width = Target.getLongWidth(); 364 Align = Target.getLongAlign(); 365 break; 366 case BuiltinType::ULongLong: 367 case BuiltinType::LongLong: 368 Width = Target.getLongLongWidth(); 369 Align = Target.getLongLongAlign(); 370 break; 371 case BuiltinType::Float: 372 Width = Target.getFloatWidth(); 373 Align = Target.getFloatAlign(); 374 break; 375 case BuiltinType::Double: 376 Width = Target.getDoubleWidth(); 377 Align = Target.getDoubleAlign(); 378 break; 379 case BuiltinType::LongDouble: 380 Width = Target.getLongDoubleWidth(); 381 Align = Target.getLongDoubleAlign(); 382 break; 383 } 384 break; 385 case Type::FixedWidthInt: 386 // FIXME: This isn't precisely correct; the width/alignment should depend 387 // on the available types for the target 388 Width = cast<FixedWidthIntType>(T)->getWidth(); 389 Width = std::max(llvm::NextPowerOf2(Width - 1), (uint64_t)8); 390 Align = Width; 391 break; 392 case Type::ExtQual: 393 // FIXME: Pointers into different addr spaces could have different sizes and 394 // alignment requirements: getPointerInfo should take an AddrSpace. 395 return getTypeInfo(QualType(cast<ExtQualType>(T)->getBaseType(), 0)); 396 case Type::ObjCQualifiedId: 397 case Type::ObjCQualifiedClass: 398 case Type::ObjCQualifiedInterface: 399 Width = Target.getPointerWidth(0); 400 Align = Target.getPointerAlign(0); 401 break; 402 case Type::BlockPointer: { 403 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 404 Width = Target.getPointerWidth(AS); 405 Align = Target.getPointerAlign(AS); 406 break; 407 } 408 case Type::Pointer: { 409 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 410 Width = Target.getPointerWidth(AS); 411 Align = Target.getPointerAlign(AS); 412 break; 413 } 414 case Type::Reference: 415 // "When applied to a reference or a reference type, the result is the size 416 // of the referenced type." C++98 5.3.3p2: expr.sizeof. 417 // FIXME: This is wrong for struct layout: a reference in a struct has 418 // pointer size. 419 return getTypeInfo(cast<ReferenceType>(T)->getPointeeType()); 420 case Type::MemberPointer: { 421 // FIXME: This is not only platform- but also ABI-dependent. We follow 422 // the GCC ABI, where pointers to data are one pointer large, pointers to 423 // functions two pointers. But if we want to support ABI compatibility with 424 // other compilers too, we need to delegate this completely to TargetInfo 425 // or some ABI abstraction layer. 426 QualType Pointee = cast<MemberPointerType>(T)->getPointeeType(); 427 unsigned AS = Pointee.getAddressSpace(); 428 Width = Target.getPointerWidth(AS); 429 if (Pointee->isFunctionType()) 430 Width *= 2; 431 Align = Target.getPointerAlign(AS); 432 // GCC aligns at single pointer width. 433 } 434 case Type::Complex: { 435 // Complex types have the same alignment as their elements, but twice the 436 // size. 437 std::pair<uint64_t, unsigned> EltInfo = 438 getTypeInfo(cast<ComplexType>(T)->getElementType()); 439 Width = EltInfo.first*2; 440 Align = EltInfo.second; 441 break; 442 } 443 case Type::ObjCInterface: { 444 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 445 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 446 Width = Layout.getSize(); 447 Align = Layout.getAlignment(); 448 break; 449 } 450 case Type::Record: 451 case Type::CXXRecord: 452 case Type::Enum: { 453 const TagType *TT = cast<TagType>(T); 454 455 if (TT->getDecl()->isInvalidDecl()) { 456 Width = 1; 457 Align = 1; 458 break; 459 } 460 461 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 462 return getTypeInfo(ET->getDecl()->getIntegerType()); 463 464 const RecordType *RT = cast<RecordType>(TT); 465 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 466 Width = Layout.getSize(); 467 Align = Layout.getAlignment(); 468 break; 469 } 470 } 471 472 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 473 return std::make_pair(Width, Align); 474} 475 476/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 477/// type for the current target in bits. This can be different than the ABI 478/// alignment in cases where it is beneficial for performance to overalign 479/// a data type. 480unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 481 unsigned ABIAlign = getTypeAlign(T); 482 483 // Doubles should be naturally aligned if possible. 484 if (T->isSpecificBuiltinType(BuiltinType::Double)) 485 return std::max(ABIAlign, 64U); 486 487 return ABIAlign; 488} 489 490 491/// LayoutField - Field layout. 492void ASTRecordLayout::LayoutField(const FieldDecl *FD, unsigned FieldNo, 493 bool IsUnion, unsigned StructPacking, 494 ASTContext &Context) { 495 unsigned FieldPacking = StructPacking; 496 uint64_t FieldOffset = IsUnion ? 0 : Size; 497 uint64_t FieldSize; 498 unsigned FieldAlign; 499 500 // FIXME: Should this override struct packing? Probably we want to 501 // take the minimum? 502 if (const PackedAttr *PA = FD->getAttr<PackedAttr>()) 503 FieldPacking = PA->getAlignment(); 504 505 if (const Expr *BitWidthExpr = FD->getBitWidth()) { 506 // TODO: Need to check this algorithm on other targets! 507 // (tested on Linux-X86) 508 FieldSize = 509 BitWidthExpr->getIntegerConstantExprValue(Context).getZExtValue(); 510 511 std::pair<uint64_t, unsigned> FieldInfo = 512 Context.getTypeInfo(FD->getType()); 513 uint64_t TypeSize = FieldInfo.first; 514 515 // Determine the alignment of this bitfield. The packing 516 // attributes define a maximum and the alignment attribute defines 517 // a minimum. 518 // FIXME: What is the right behavior when the specified alignment 519 // is smaller than the specified packing? 520 FieldAlign = FieldInfo.second; 521 if (FieldPacking) 522 FieldAlign = std::min(FieldAlign, FieldPacking); 523 if (const AlignedAttr *AA = FD->getAttr<AlignedAttr>()) 524 FieldAlign = std::max(FieldAlign, AA->getAlignment()); 525 526 // Check if we need to add padding to give the field the correct 527 // alignment. 528 if (FieldSize == 0 || (FieldOffset & (FieldAlign-1)) + FieldSize > TypeSize) 529 FieldOffset = (FieldOffset + (FieldAlign-1)) & ~(FieldAlign-1); 530 531 // Padding members don't affect overall alignment 532 if (!FD->getIdentifier()) 533 FieldAlign = 1; 534 } else { 535 if (FD->getType()->isIncompleteArrayType()) { 536 // This is a flexible array member; we can't directly 537 // query getTypeInfo about these, so we figure it out here. 538 // Flexible array members don't have any size, but they 539 // have to be aligned appropriately for their element type. 540 FieldSize = 0; 541 const ArrayType* ATy = Context.getAsArrayType(FD->getType()); 542 FieldAlign = Context.getTypeAlign(ATy->getElementType()); 543 } else { 544 std::pair<uint64_t, unsigned> FieldInfo = 545 Context.getTypeInfo(FD->getType()); 546 FieldSize = FieldInfo.first; 547 FieldAlign = FieldInfo.second; 548 } 549 550 // Determine the alignment of this bitfield. The packing 551 // attributes define a maximum and the alignment attribute defines 552 // a minimum. Additionally, the packing alignment must be at least 553 // a byte for non-bitfields. 554 // 555 // FIXME: What is the right behavior when the specified alignment 556 // is smaller than the specified packing? 557 if (FieldPacking) 558 FieldAlign = std::min(FieldAlign, std::max(8U, FieldPacking)); 559 if (const AlignedAttr *AA = FD->getAttr<AlignedAttr>()) 560 FieldAlign = std::max(FieldAlign, AA->getAlignment()); 561 562 // Round up the current record size to the field's alignment boundary. 563 FieldOffset = (FieldOffset + (FieldAlign-1)) & ~(FieldAlign-1); 564 } 565 566 // Place this field at the current location. 567 FieldOffsets[FieldNo] = FieldOffset; 568 569 // Reserve space for this field. 570 if (IsUnion) { 571 Size = std::max(Size, FieldSize); 572 } else { 573 Size = FieldOffset + FieldSize; 574 } 575 576 // Remember max struct/class alignment. 577 Alignment = std::max(Alignment, FieldAlign); 578} 579 580static void CollectObjCIvars(const ObjCInterfaceDecl *OI, 581 std::vector<FieldDecl*> &Fields) { 582 const ObjCInterfaceDecl *SuperClass = OI->getSuperClass(); 583 if (SuperClass) 584 CollectObjCIvars(SuperClass, Fields); 585 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 586 E = OI->ivar_end(); I != E; ++I) { 587 ObjCIvarDecl *IVDecl = (*I); 588 if (!IVDecl->isInvalidDecl()) 589 Fields.push_back(cast<FieldDecl>(IVDecl)); 590 } 591} 592 593/// addRecordToClass - produces record info. for the class for its 594/// ivars and all those inherited. 595/// 596const RecordDecl *ASTContext::addRecordToClass(const ObjCInterfaceDecl *D) 597{ 598 const RecordDecl *&RD = ASTRecordForInterface[D]; 599 if (RD) 600 return RD; 601 std::vector<FieldDecl*> RecFields; 602 CollectObjCIvars(D, RecFields); 603 RecordDecl *NewRD = RecordDecl::Create(*this, TagDecl::TK_struct, 0, 604 D->getLocation(), 605 D->getIdentifier()); 606 /// FIXME! Can do collection of ivars and adding to the record while 607 /// doing it. 608 for (unsigned int i = 0; i != RecFields.size(); i++) { 609 FieldDecl *Field = FieldDecl::Create(*this, NewRD, 610 RecFields[i]->getLocation(), 611 RecFields[i]->getIdentifier(), 612 RecFields[i]->getType(), 613 RecFields[i]->getBitWidth(), false); 614 NewRD->addDecl(Field); 615 } 616 NewRD->completeDefinition(*this); 617 RD = NewRD; 618 return RD; 619} 620 621/// setFieldDecl - maps a field for the given Ivar reference node. 622// 623void ASTContext::setFieldDecl(const ObjCInterfaceDecl *OI, 624 const ObjCIvarDecl *Ivar, 625 const ObjCIvarRefExpr *MRef) { 626 FieldDecl *FD = (const_cast<ObjCInterfaceDecl *>(OI))-> 627 lookupFieldDeclForIvar(*this, Ivar); 628 ASTFieldForIvarRef[MRef] = FD; 629} 630 631/// getASTObjcInterfaceLayout - Get or compute information about the layout of 632/// the specified Objective C, which indicates its size and ivar 633/// position information. 634const ASTRecordLayout & 635ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 636 // Look up this layout, if already laid out, return what we have. 637 const ASTRecordLayout *&Entry = ASTObjCInterfaces[D]; 638 if (Entry) return *Entry; 639 640 // Allocate and assign into ASTRecordLayouts here. The "Entry" reference can 641 // be invalidated (dangle) if the ASTRecordLayouts hashtable is inserted into. 642 ASTRecordLayout *NewEntry = NULL; 643 unsigned FieldCount = D->ivar_size(); 644 if (ObjCInterfaceDecl *SD = D->getSuperClass()) { 645 FieldCount++; 646 const ASTRecordLayout &SL = getASTObjCInterfaceLayout(SD); 647 unsigned Alignment = SL.getAlignment(); 648 uint64_t Size = SL.getSize(); 649 NewEntry = new ASTRecordLayout(Size, Alignment); 650 NewEntry->InitializeLayout(FieldCount); 651 // Super class is at the beginning of the layout. 652 NewEntry->SetFieldOffset(0, 0); 653 } else { 654 NewEntry = new ASTRecordLayout(); 655 NewEntry->InitializeLayout(FieldCount); 656 } 657 Entry = NewEntry; 658 659 unsigned StructPacking = 0; 660 if (const PackedAttr *PA = D->getAttr<PackedAttr>()) 661 StructPacking = PA->getAlignment(); 662 663 if (const AlignedAttr *AA = D->getAttr<AlignedAttr>()) 664 NewEntry->SetAlignment(std::max(NewEntry->getAlignment(), 665 AA->getAlignment())); 666 667 // Layout each ivar sequentially. 668 unsigned i = 0; 669 for (ObjCInterfaceDecl::ivar_iterator IVI = D->ivar_begin(), 670 IVE = D->ivar_end(); IVI != IVE; ++IVI) { 671 const ObjCIvarDecl* Ivar = (*IVI); 672 NewEntry->LayoutField(Ivar, i++, false, StructPacking, *this); 673 } 674 675 // Finally, round the size of the total struct up to the alignment of the 676 // struct itself. 677 NewEntry->FinalizeLayout(); 678 return *NewEntry; 679} 680 681/// getASTRecordLayout - Get or compute information about the layout of the 682/// specified record (struct/union/class), which indicates its size and field 683/// position information. 684const ASTRecordLayout &ASTContext::getASTRecordLayout(const RecordDecl *D) { 685 D = D->getDefinition(*this); 686 assert(D && "Cannot get layout of forward declarations!"); 687 688 // Look up this layout, if already laid out, return what we have. 689 const ASTRecordLayout *&Entry = ASTRecordLayouts[D]; 690 if (Entry) return *Entry; 691 692 // Allocate and assign into ASTRecordLayouts here. The "Entry" reference can 693 // be invalidated (dangle) if the ASTRecordLayouts hashtable is inserted into. 694 ASTRecordLayout *NewEntry = new ASTRecordLayout(); 695 Entry = NewEntry; 696 697 // FIXME: Avoid linear walk through the fields, if possible. 698 NewEntry->InitializeLayout(std::distance(D->field_begin(), D->field_end())); 699 bool IsUnion = D->isUnion(); 700 701 unsigned StructPacking = 0; 702 if (const PackedAttr *PA = D->getAttr<PackedAttr>()) 703 StructPacking = PA->getAlignment(); 704 705 if (const AlignedAttr *AA = D->getAttr<AlignedAttr>()) 706 NewEntry->SetAlignment(std::max(NewEntry->getAlignment(), 707 AA->getAlignment())); 708 709 // Layout each field, for now, just sequentially, respecting alignment. In 710 // the future, this will need to be tweakable by targets. 711 unsigned FieldIdx = 0; 712 for (RecordDecl::field_iterator Field = D->field_begin(), 713 FieldEnd = D->field_end(); 714 Field != FieldEnd; (void)++Field, ++FieldIdx) 715 NewEntry->LayoutField(*Field, FieldIdx, IsUnion, StructPacking, *this); 716 717 // Finally, round the size of the total struct up to the alignment of the 718 // struct itself. 719 NewEntry->FinalizeLayout(); 720 return *NewEntry; 721} 722 723//===----------------------------------------------------------------------===// 724// Type creation/memoization methods 725//===----------------------------------------------------------------------===// 726 727QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 728 QualType CanT = getCanonicalType(T); 729 if (CanT.getAddressSpace() == AddressSpace) 730 return T; 731 732 // If we are composing extended qualifiers together, merge together into one 733 // ExtQualType node. 734 unsigned CVRQuals = T.getCVRQualifiers(); 735 QualType::GCAttrTypes GCAttr = QualType::GCNone; 736 Type *TypeNode = T.getTypePtr(); 737 738 if (ExtQualType *EQT = dyn_cast<ExtQualType>(TypeNode)) { 739 // If this type already has an address space specified, it cannot get 740 // another one. 741 assert(EQT->getAddressSpace() == 0 && 742 "Type cannot be in multiple addr spaces!"); 743 GCAttr = EQT->getObjCGCAttr(); 744 TypeNode = EQT->getBaseType(); 745 } 746 747 // Check if we've already instantiated this type. 748 llvm::FoldingSetNodeID ID; 749 ExtQualType::Profile(ID, TypeNode, AddressSpace, GCAttr); 750 void *InsertPos = 0; 751 if (ExtQualType *EXTQy = ExtQualTypes.FindNodeOrInsertPos(ID, InsertPos)) 752 return QualType(EXTQy, CVRQuals); 753 754 // If the base type isn't canonical, this won't be a canonical type either, 755 // so fill in the canonical type field. 756 QualType Canonical; 757 if (!TypeNode->isCanonical()) { 758 Canonical = getAddrSpaceQualType(CanT, AddressSpace); 759 760 // Update InsertPos, the previous call could have invalidated it. 761 ExtQualType *NewIP = ExtQualTypes.FindNodeOrInsertPos(ID, InsertPos); 762 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 763 } 764 ExtQualType *New = 765 new (*this, 8) ExtQualType(TypeNode, Canonical, AddressSpace, GCAttr); 766 ExtQualTypes.InsertNode(New, InsertPos); 767 Types.push_back(New); 768 return QualType(New, CVRQuals); 769} 770 771QualType ASTContext::getObjCGCQualType(QualType T, 772 QualType::GCAttrTypes GCAttr) { 773 QualType CanT = getCanonicalType(T); 774 if (CanT.getObjCGCAttr() == GCAttr) 775 return T; 776 777 // If we are composing extended qualifiers together, merge together into one 778 // ExtQualType node. 779 unsigned CVRQuals = T.getCVRQualifiers(); 780 Type *TypeNode = T.getTypePtr(); 781 unsigned AddressSpace = 0; 782 783 if (ExtQualType *EQT = dyn_cast<ExtQualType>(TypeNode)) { 784 // If this type already has an address space specified, it cannot get 785 // another one. 786 assert(EQT->getObjCGCAttr() == QualType::GCNone && 787 "Type cannot be in multiple addr spaces!"); 788 AddressSpace = EQT->getAddressSpace(); 789 TypeNode = EQT->getBaseType(); 790 } 791 792 // Check if we've already instantiated an gc qual'd type of this type. 793 llvm::FoldingSetNodeID ID; 794 ExtQualType::Profile(ID, TypeNode, AddressSpace, GCAttr); 795 void *InsertPos = 0; 796 if (ExtQualType *EXTQy = ExtQualTypes.FindNodeOrInsertPos(ID, InsertPos)) 797 return QualType(EXTQy, CVRQuals); 798 799 // If the base type isn't canonical, this won't be a canonical type either, 800 // so fill in the canonical type field. 801 QualType Canonical; 802 if (!T->isCanonical()) { 803 Canonical = getObjCGCQualType(CanT, GCAttr); 804 805 // Update InsertPos, the previous call could have invalidated it. 806 ExtQualType *NewIP = ExtQualTypes.FindNodeOrInsertPos(ID, InsertPos); 807 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 808 } 809 ExtQualType *New = 810 new (*this, 8) ExtQualType(TypeNode, Canonical, AddressSpace, GCAttr); 811 ExtQualTypes.InsertNode(New, InsertPos); 812 Types.push_back(New); 813 return QualType(New, CVRQuals); 814} 815 816/// getComplexType - Return the uniqued reference to the type for a complex 817/// number with the specified element type. 818QualType ASTContext::getComplexType(QualType T) { 819 // Unique pointers, to guarantee there is only one pointer of a particular 820 // structure. 821 llvm::FoldingSetNodeID ID; 822 ComplexType::Profile(ID, T); 823 824 void *InsertPos = 0; 825 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 826 return QualType(CT, 0); 827 828 // If the pointee type isn't canonical, this won't be a canonical type either, 829 // so fill in the canonical type field. 830 QualType Canonical; 831 if (!T->isCanonical()) { 832 Canonical = getComplexType(getCanonicalType(T)); 833 834 // Get the new insert position for the node we care about. 835 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 836 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 837 } 838 ComplexType *New = new (*this,8) ComplexType(T, Canonical); 839 Types.push_back(New); 840 ComplexTypes.InsertNode(New, InsertPos); 841 return QualType(New, 0); 842} 843 844QualType ASTContext::getFixedWidthIntType(unsigned Width, bool Signed) { 845 llvm::DenseMap<unsigned, FixedWidthIntType*> &Map = Signed ? 846 SignedFixedWidthIntTypes : UnsignedFixedWidthIntTypes; 847 FixedWidthIntType *&Entry = Map[Width]; 848 if (!Entry) 849 Entry = new FixedWidthIntType(Width, Signed); 850 return QualType(Entry, 0); 851} 852 853/// getPointerType - Return the uniqued reference to the type for a pointer to 854/// the specified type. 855QualType ASTContext::getPointerType(QualType T) { 856 // Unique pointers, to guarantee there is only one pointer of a particular 857 // structure. 858 llvm::FoldingSetNodeID ID; 859 PointerType::Profile(ID, T); 860 861 void *InsertPos = 0; 862 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 863 return QualType(PT, 0); 864 865 // If the pointee type isn't canonical, this won't be a canonical type either, 866 // so fill in the canonical type field. 867 QualType Canonical; 868 if (!T->isCanonical()) { 869 Canonical = getPointerType(getCanonicalType(T)); 870 871 // Get the new insert position for the node we care about. 872 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 873 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 874 } 875 PointerType *New = new (*this,8) PointerType(T, Canonical); 876 Types.push_back(New); 877 PointerTypes.InsertNode(New, InsertPos); 878 return QualType(New, 0); 879} 880 881/// getBlockPointerType - Return the uniqued reference to the type for 882/// a pointer to the specified block. 883QualType ASTContext::getBlockPointerType(QualType T) { 884 assert(T->isFunctionType() && "block of function types only"); 885 // Unique pointers, to guarantee there is only one block of a particular 886 // structure. 887 llvm::FoldingSetNodeID ID; 888 BlockPointerType::Profile(ID, T); 889 890 void *InsertPos = 0; 891 if (BlockPointerType *PT = 892 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 893 return QualType(PT, 0); 894 895 // If the block pointee type isn't canonical, this won't be a canonical 896 // type either so fill in the canonical type field. 897 QualType Canonical; 898 if (!T->isCanonical()) { 899 Canonical = getBlockPointerType(getCanonicalType(T)); 900 901 // Get the new insert position for the node we care about. 902 BlockPointerType *NewIP = 903 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 904 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 905 } 906 BlockPointerType *New = new (*this,8) BlockPointerType(T, Canonical); 907 Types.push_back(New); 908 BlockPointerTypes.InsertNode(New, InsertPos); 909 return QualType(New, 0); 910} 911 912/// getReferenceType - Return the uniqued reference to the type for a reference 913/// to the specified type. 914QualType ASTContext::getReferenceType(QualType T) { 915 // Unique pointers, to guarantee there is only one pointer of a particular 916 // structure. 917 llvm::FoldingSetNodeID ID; 918 ReferenceType::Profile(ID, T); 919 920 void *InsertPos = 0; 921 if (ReferenceType *RT = ReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 922 return QualType(RT, 0); 923 924 // If the referencee type isn't canonical, this won't be a canonical type 925 // either, so fill in the canonical type field. 926 QualType Canonical; 927 if (!T->isCanonical()) { 928 Canonical = getReferenceType(getCanonicalType(T)); 929 930 // Get the new insert position for the node we care about. 931 ReferenceType *NewIP = ReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 932 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 933 } 934 935 ReferenceType *New = new (*this,8) ReferenceType(T, Canonical); 936 Types.push_back(New); 937 ReferenceTypes.InsertNode(New, InsertPos); 938 return QualType(New, 0); 939} 940 941/// getMemberPointerType - Return the uniqued reference to the type for a 942/// member pointer to the specified type, in the specified class. 943QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) 944{ 945 // Unique pointers, to guarantee there is only one pointer of a particular 946 // structure. 947 llvm::FoldingSetNodeID ID; 948 MemberPointerType::Profile(ID, T, Cls); 949 950 void *InsertPos = 0; 951 if (MemberPointerType *PT = 952 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 953 return QualType(PT, 0); 954 955 // If the pointee or class type isn't canonical, this won't be a canonical 956 // type either, so fill in the canonical type field. 957 QualType Canonical; 958 if (!T->isCanonical()) { 959 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 960 961 // Get the new insert position for the node we care about. 962 MemberPointerType *NewIP = 963 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 964 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 965 } 966 MemberPointerType *New = new (*this,8) MemberPointerType(T, Cls, Canonical); 967 Types.push_back(New); 968 MemberPointerTypes.InsertNode(New, InsertPos); 969 return QualType(New, 0); 970} 971 972/// getConstantArrayType - Return the unique reference to the type for an 973/// array of the specified element type. 974QualType ASTContext::getConstantArrayType(QualType EltTy, 975 const llvm::APInt &ArySize, 976 ArrayType::ArraySizeModifier ASM, 977 unsigned EltTypeQuals) { 978 llvm::FoldingSetNodeID ID; 979 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 980 981 void *InsertPos = 0; 982 if (ConstantArrayType *ATP = 983 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 984 return QualType(ATP, 0); 985 986 // If the element type isn't canonical, this won't be a canonical type either, 987 // so fill in the canonical type field. 988 QualType Canonical; 989 if (!EltTy->isCanonical()) { 990 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 991 ASM, EltTypeQuals); 992 // Get the new insert position for the node we care about. 993 ConstantArrayType *NewIP = 994 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 995 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 996 } 997 998 ConstantArrayType *New = 999 new(*this,8)ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1000 ConstantArrayTypes.InsertNode(New, InsertPos); 1001 Types.push_back(New); 1002 return QualType(New, 0); 1003} 1004 1005/// getVariableArrayType - Returns a non-unique reference to the type for a 1006/// variable array of the specified element type. 1007QualType ASTContext::getVariableArrayType(QualType EltTy, Expr *NumElts, 1008 ArrayType::ArraySizeModifier ASM, 1009 unsigned EltTypeQuals) { 1010 // Since we don't unique expressions, it isn't possible to unique VLA's 1011 // that have an expression provided for their size. 1012 1013 VariableArrayType *New = 1014 new(*this,8)VariableArrayType(EltTy,QualType(), NumElts, ASM, EltTypeQuals); 1015 1016 VariableArrayTypes.push_back(New); 1017 Types.push_back(New); 1018 return QualType(New, 0); 1019} 1020 1021/// getDependentSizedArrayType - Returns a non-unique reference to 1022/// the type for a dependently-sized array of the specified element 1023/// type. FIXME: We will need these to be uniqued, or at least 1024/// comparable, at some point. 1025QualType ASTContext::getDependentSizedArrayType(QualType EltTy, Expr *NumElts, 1026 ArrayType::ArraySizeModifier ASM, 1027 unsigned EltTypeQuals) { 1028 assert((NumElts->isTypeDependent() || NumElts->isValueDependent()) && 1029 "Size must be type- or value-dependent!"); 1030 1031 // Since we don't unique expressions, it isn't possible to unique 1032 // dependently-sized array types. 1033 1034 DependentSizedArrayType *New = 1035 new (*this,8) DependentSizedArrayType(EltTy, QualType(), NumElts, 1036 ASM, EltTypeQuals); 1037 1038 DependentSizedArrayTypes.push_back(New); 1039 Types.push_back(New); 1040 return QualType(New, 0); 1041} 1042 1043QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1044 ArrayType::ArraySizeModifier ASM, 1045 unsigned EltTypeQuals) { 1046 llvm::FoldingSetNodeID ID; 1047 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1048 1049 void *InsertPos = 0; 1050 if (IncompleteArrayType *ATP = 1051 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1052 return QualType(ATP, 0); 1053 1054 // If the element type isn't canonical, this won't be a canonical type 1055 // either, so fill in the canonical type field. 1056 QualType Canonical; 1057 1058 if (!EltTy->isCanonical()) { 1059 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1060 ASM, EltTypeQuals); 1061 1062 // Get the new insert position for the node we care about. 1063 IncompleteArrayType *NewIP = 1064 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1065 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1066 } 1067 1068 IncompleteArrayType *New = new (*this,8) IncompleteArrayType(EltTy, Canonical, 1069 ASM, EltTypeQuals); 1070 1071 IncompleteArrayTypes.InsertNode(New, InsertPos); 1072 Types.push_back(New); 1073 return QualType(New, 0); 1074} 1075 1076/// getVectorType - Return the unique reference to a vector type of 1077/// the specified element type and size. VectorType must be a built-in type. 1078QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts) { 1079 BuiltinType *baseType; 1080 1081 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1082 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1083 1084 // Check if we've already instantiated a vector of this type. 1085 llvm::FoldingSetNodeID ID; 1086 VectorType::Profile(ID, vecType, NumElts, Type::Vector); 1087 void *InsertPos = 0; 1088 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1089 return QualType(VTP, 0); 1090 1091 // If the element type isn't canonical, this won't be a canonical type either, 1092 // so fill in the canonical type field. 1093 QualType Canonical; 1094 if (!vecType->isCanonical()) { 1095 Canonical = getVectorType(getCanonicalType(vecType), NumElts); 1096 1097 // Get the new insert position for the node we care about. 1098 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1099 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1100 } 1101 VectorType *New = new (*this,8) VectorType(vecType, NumElts, Canonical); 1102 VectorTypes.InsertNode(New, InsertPos); 1103 Types.push_back(New); 1104 return QualType(New, 0); 1105} 1106 1107/// getExtVectorType - Return the unique reference to an extended vector type of 1108/// the specified element type and size. VectorType must be a built-in type. 1109QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1110 BuiltinType *baseType; 1111 1112 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1113 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1114 1115 // Check if we've already instantiated a vector of this type. 1116 llvm::FoldingSetNodeID ID; 1117 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector); 1118 void *InsertPos = 0; 1119 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1120 return QualType(VTP, 0); 1121 1122 // If the element type isn't canonical, this won't be a canonical type either, 1123 // so fill in the canonical type field. 1124 QualType Canonical; 1125 if (!vecType->isCanonical()) { 1126 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1127 1128 // Get the new insert position for the node we care about. 1129 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1130 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1131 } 1132 ExtVectorType *New = new (*this,8) ExtVectorType(vecType, NumElts, Canonical); 1133 VectorTypes.InsertNode(New, InsertPos); 1134 Types.push_back(New); 1135 return QualType(New, 0); 1136} 1137 1138/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1139/// 1140QualType ASTContext::getFunctionNoProtoType(QualType ResultTy) { 1141 // Unique functions, to guarantee there is only one function of a particular 1142 // structure. 1143 llvm::FoldingSetNodeID ID; 1144 FunctionNoProtoType::Profile(ID, ResultTy); 1145 1146 void *InsertPos = 0; 1147 if (FunctionNoProtoType *FT = 1148 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1149 return QualType(FT, 0); 1150 1151 QualType Canonical; 1152 if (!ResultTy->isCanonical()) { 1153 Canonical = getFunctionNoProtoType(getCanonicalType(ResultTy)); 1154 1155 // Get the new insert position for the node we care about. 1156 FunctionNoProtoType *NewIP = 1157 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1158 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1159 } 1160 1161 FunctionNoProtoType *New =new(*this,8)FunctionNoProtoType(ResultTy,Canonical); 1162 Types.push_back(New); 1163 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1164 return QualType(New, 0); 1165} 1166 1167/// getFunctionType - Return a normal function type with a typed argument 1168/// list. isVariadic indicates whether the argument list includes '...'. 1169QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1170 unsigned NumArgs, bool isVariadic, 1171 unsigned TypeQuals) { 1172 // Unique functions, to guarantee there is only one function of a particular 1173 // structure. 1174 llvm::FoldingSetNodeID ID; 1175 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1176 TypeQuals); 1177 1178 void *InsertPos = 0; 1179 if (FunctionProtoType *FTP = 1180 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1181 return QualType(FTP, 0); 1182 1183 // Determine whether the type being created is already canonical or not. 1184 bool isCanonical = ResultTy->isCanonical(); 1185 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1186 if (!ArgArray[i]->isCanonical()) 1187 isCanonical = false; 1188 1189 // If this type isn't canonical, get the canonical version of it. 1190 QualType Canonical; 1191 if (!isCanonical) { 1192 llvm::SmallVector<QualType, 16> CanonicalArgs; 1193 CanonicalArgs.reserve(NumArgs); 1194 for (unsigned i = 0; i != NumArgs; ++i) 1195 CanonicalArgs.push_back(getCanonicalType(ArgArray[i])); 1196 1197 Canonical = getFunctionType(getCanonicalType(ResultTy), 1198 &CanonicalArgs[0], NumArgs, 1199 isVariadic, TypeQuals); 1200 1201 // Get the new insert position for the node we care about. 1202 FunctionProtoType *NewIP = 1203 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1204 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1205 } 1206 1207 // FunctionProtoType objects are allocated with extra bytes after them 1208 // for a variable size array (for parameter types) at the end of them. 1209 FunctionProtoType *FTP = 1210 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1211 NumArgs*sizeof(QualType), 8); 1212 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1213 TypeQuals, Canonical); 1214 Types.push_back(FTP); 1215 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1216 return QualType(FTP, 0); 1217} 1218 1219/// getTypeDeclType - Return the unique reference to the type for the 1220/// specified type declaration. 1221QualType ASTContext::getTypeDeclType(TypeDecl *Decl, TypeDecl* PrevDecl) { 1222 assert(Decl && "Passed null for Decl param"); 1223 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1224 1225 if (TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1226 return getTypedefType(Typedef); 1227 else if (isa<TemplateTypeParmDecl>(Decl)) { 1228 assert(false && "Template type parameter types are always available."); 1229 } else if (ObjCInterfaceDecl *ObjCInterface = dyn_cast<ObjCInterfaceDecl>(Decl)) 1230 return getObjCInterfaceType(ObjCInterface); 1231 1232 if (CXXRecordDecl *CXXRecord = dyn_cast<CXXRecordDecl>(Decl)) { 1233 if (PrevDecl) 1234 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1235 else 1236 Decl->TypeForDecl = new (*this,8) CXXRecordType(CXXRecord); 1237 } 1238 else if (RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1239 if (PrevDecl) 1240 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1241 else 1242 Decl->TypeForDecl = new (*this,8) RecordType(Record); 1243 } 1244 else if (EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1245 if (PrevDecl) 1246 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1247 else 1248 Decl->TypeForDecl = new (*this,8) EnumType(Enum); 1249 } 1250 else 1251 assert(false && "TypeDecl without a type?"); 1252 1253 if (!PrevDecl) Types.push_back(Decl->TypeForDecl); 1254 return QualType(Decl->TypeForDecl, 0); 1255} 1256 1257/// getTypedefType - Return the unique reference to the type for the 1258/// specified typename decl. 1259QualType ASTContext::getTypedefType(TypedefDecl *Decl) { 1260 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1261 1262 QualType Canonical = getCanonicalType(Decl->getUnderlyingType()); 1263 Decl->TypeForDecl = new(*this,8) TypedefType(Type::Typedef, Decl, Canonical); 1264 Types.push_back(Decl->TypeForDecl); 1265 return QualType(Decl->TypeForDecl, 0); 1266} 1267 1268/// getObjCInterfaceType - Return the unique reference to the type for the 1269/// specified ObjC interface decl. 1270QualType ASTContext::getObjCInterfaceType(ObjCInterfaceDecl *Decl) { 1271 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1272 1273 Decl->TypeForDecl = new(*this,8) ObjCInterfaceType(Type::ObjCInterface, Decl); 1274 Types.push_back(Decl->TypeForDecl); 1275 return QualType(Decl->TypeForDecl, 0); 1276} 1277 1278/// buildObjCInterfaceType - Returns a new type for the interface 1279/// declaration, regardless. It also removes any previously built 1280/// record declaration so caller can rebuild it. 1281QualType ASTContext::buildObjCInterfaceType(ObjCInterfaceDecl *Decl) { 1282 const RecordDecl *&RD = ASTRecordForInterface[Decl]; 1283 if (RD) 1284 RD = 0; 1285 Decl->TypeForDecl = new(*this,8) ObjCInterfaceType(Type::ObjCInterface, Decl); 1286 Types.push_back(Decl->TypeForDecl); 1287 return QualType(Decl->TypeForDecl, 0); 1288} 1289 1290/// \brief Retrieve the template type parameter type for a template 1291/// parameter with the given depth, index, and (optionally) name. 1292QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1293 IdentifierInfo *Name) { 1294 llvm::FoldingSetNodeID ID; 1295 TemplateTypeParmType::Profile(ID, Depth, Index, Name); 1296 void *InsertPos = 0; 1297 TemplateTypeParmType *TypeParm 1298 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1299 1300 if (TypeParm) 1301 return QualType(TypeParm, 0); 1302 1303 if (Name) 1304 TypeParm = new (*this, 8) TemplateTypeParmType(Depth, Index, Name, 1305 getTemplateTypeParmType(Depth, Index)); 1306 else 1307 TypeParm = new (*this, 8) TemplateTypeParmType(Depth, Index); 1308 1309 Types.push_back(TypeParm); 1310 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1311 1312 return QualType(TypeParm, 0); 1313} 1314 1315QualType 1316ASTContext::getClassTemplateSpecializationType(TemplateDecl *Template, 1317 unsigned NumArgs, 1318 uintptr_t *Args, bool *ArgIsType, 1319 QualType Canon) { 1320 Canon = getCanonicalType(Canon); 1321 1322 llvm::FoldingSetNodeID ID; 1323 ClassTemplateSpecializationType::Profile(ID, Template, NumArgs, Args, 1324 ArgIsType); 1325 void *InsertPos = 0; 1326 ClassTemplateSpecializationType *Spec 1327 = ClassTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1328 1329 if (Spec) 1330 return QualType(Spec, 0); 1331 1332 void *Mem = Allocate(sizeof(ClassTemplateSpecializationType) + 1333 (sizeof(uintptr_t) * 1334 (ClassTemplateSpecializationType:: 1335 getNumPackedWords(NumArgs) + 1336 NumArgs)), 8); 1337 Spec = new (Mem) ClassTemplateSpecializationType(Template, NumArgs, Args, 1338 ArgIsType, Canon); 1339 Types.push_back(Spec); 1340 ClassTemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1341 1342 return QualType(Spec, 0); 1343} 1344 1345/// CmpProtocolNames - Comparison predicate for sorting protocols 1346/// alphabetically. 1347static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 1348 const ObjCProtocolDecl *RHS) { 1349 return LHS->getDeclName() < RHS->getDeclName(); 1350} 1351 1352static void SortAndUniqueProtocols(ObjCProtocolDecl **&Protocols, 1353 unsigned &NumProtocols) { 1354 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 1355 1356 // Sort protocols, keyed by name. 1357 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 1358 1359 // Remove duplicates. 1360 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 1361 NumProtocols = ProtocolsEnd-Protocols; 1362} 1363 1364 1365/// getObjCQualifiedInterfaceType - Return a ObjCQualifiedInterfaceType type for 1366/// the given interface decl and the conforming protocol list. 1367QualType ASTContext::getObjCQualifiedInterfaceType(ObjCInterfaceDecl *Decl, 1368 ObjCProtocolDecl **Protocols, unsigned NumProtocols) { 1369 // Sort the protocol list alphabetically to canonicalize it. 1370 SortAndUniqueProtocols(Protocols, NumProtocols); 1371 1372 llvm::FoldingSetNodeID ID; 1373 ObjCQualifiedInterfaceType::Profile(ID, Decl, Protocols, NumProtocols); 1374 1375 void *InsertPos = 0; 1376 if (ObjCQualifiedInterfaceType *QT = 1377 ObjCQualifiedInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1378 return QualType(QT, 0); 1379 1380 // No Match; 1381 ObjCQualifiedInterfaceType *QType = 1382 new (*this,8) ObjCQualifiedInterfaceType(Decl, Protocols, NumProtocols); 1383 1384 Types.push_back(QType); 1385 ObjCQualifiedInterfaceTypes.InsertNode(QType, InsertPos); 1386 return QualType(QType, 0); 1387} 1388 1389/// getObjCQualifiedIdType - Return an ObjCQualifiedIdType for the 'id' decl 1390/// and the conforming protocol list. 1391QualType ASTContext::getObjCQualifiedIdType(ObjCProtocolDecl **Protocols, 1392 unsigned NumProtocols) { 1393 // Sort the protocol list alphabetically to canonicalize it. 1394 SortAndUniqueProtocols(Protocols, NumProtocols); 1395 1396 llvm::FoldingSetNodeID ID; 1397 ObjCQualifiedIdType::Profile(ID, Protocols, NumProtocols); 1398 1399 void *InsertPos = 0; 1400 if (ObjCQualifiedIdType *QT = 1401 ObjCQualifiedIdTypes.FindNodeOrInsertPos(ID, InsertPos)) 1402 return QualType(QT, 0); 1403 1404 // No Match; 1405 ObjCQualifiedIdType *QType = 1406 new (*this,8) ObjCQualifiedIdType(Protocols, NumProtocols); 1407 Types.push_back(QType); 1408 ObjCQualifiedIdTypes.InsertNode(QType, InsertPos); 1409 return QualType(QType, 0); 1410} 1411 1412/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 1413/// TypeOfExprType AST's (since expression's are never shared). For example, 1414/// multiple declarations that refer to "typeof(x)" all contain different 1415/// DeclRefExpr's. This doesn't effect the type checker, since it operates 1416/// on canonical type's (which are always unique). 1417QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 1418 QualType Canonical = getCanonicalType(tofExpr->getType()); 1419 TypeOfExprType *toe = new (*this,8) TypeOfExprType(tofExpr, Canonical); 1420 Types.push_back(toe); 1421 return QualType(toe, 0); 1422} 1423 1424/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 1425/// TypeOfType AST's. The only motivation to unique these nodes would be 1426/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 1427/// an issue. This doesn't effect the type checker, since it operates 1428/// on canonical type's (which are always unique). 1429QualType ASTContext::getTypeOfType(QualType tofType) { 1430 QualType Canonical = getCanonicalType(tofType); 1431 TypeOfType *tot = new (*this,8) TypeOfType(tofType, Canonical); 1432 Types.push_back(tot); 1433 return QualType(tot, 0); 1434} 1435 1436/// getTagDeclType - Return the unique reference to the type for the 1437/// specified TagDecl (struct/union/class/enum) decl. 1438QualType ASTContext::getTagDeclType(TagDecl *Decl) { 1439 assert (Decl); 1440 return getTypeDeclType(Decl); 1441} 1442 1443/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 1444/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 1445/// needs to agree with the definition in <stddef.h>. 1446QualType ASTContext::getSizeType() const { 1447 return getFromTargetType(Target.getSizeType()); 1448} 1449 1450/// getSignedWCharType - Return the type of "signed wchar_t". 1451/// Used when in C++, as a GCC extension. 1452QualType ASTContext::getSignedWCharType() const { 1453 // FIXME: derive from "Target" ? 1454 return WCharTy; 1455} 1456 1457/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 1458/// Used when in C++, as a GCC extension. 1459QualType ASTContext::getUnsignedWCharType() const { 1460 // FIXME: derive from "Target" ? 1461 return UnsignedIntTy; 1462} 1463 1464/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 1465/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 1466QualType ASTContext::getPointerDiffType() const { 1467 return getFromTargetType(Target.getPtrDiffType(0)); 1468} 1469 1470//===----------------------------------------------------------------------===// 1471// Type Operators 1472//===----------------------------------------------------------------------===// 1473 1474/// getCanonicalType - Return the canonical (structural) type corresponding to 1475/// the specified potentially non-canonical type. The non-canonical version 1476/// of a type may have many "decorated" versions of types. Decorators can 1477/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 1478/// to be free of any of these, allowing two canonical types to be compared 1479/// for exact equality with a simple pointer comparison. 1480QualType ASTContext::getCanonicalType(QualType T) { 1481 QualType CanType = T.getTypePtr()->getCanonicalTypeInternal(); 1482 1483 // If the result has type qualifiers, make sure to canonicalize them as well. 1484 unsigned TypeQuals = T.getCVRQualifiers() | CanType.getCVRQualifiers(); 1485 if (TypeQuals == 0) return CanType; 1486 1487 // If the type qualifiers are on an array type, get the canonical type of the 1488 // array with the qualifiers applied to the element type. 1489 ArrayType *AT = dyn_cast<ArrayType>(CanType); 1490 if (!AT) 1491 return CanType.getQualifiedType(TypeQuals); 1492 1493 // Get the canonical version of the element with the extra qualifiers on it. 1494 // This can recursively sink qualifiers through multiple levels of arrays. 1495 QualType NewEltTy=AT->getElementType().getWithAdditionalQualifiers(TypeQuals); 1496 NewEltTy = getCanonicalType(NewEltTy); 1497 1498 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 1499 return getConstantArrayType(NewEltTy, CAT->getSize(),CAT->getSizeModifier(), 1500 CAT->getIndexTypeQualifier()); 1501 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 1502 return getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 1503 IAT->getIndexTypeQualifier()); 1504 1505 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 1506 return getDependentSizedArrayType(NewEltTy, DSAT->getSizeExpr(), 1507 DSAT->getSizeModifier(), 1508 DSAT->getIndexTypeQualifier()); 1509 1510 VariableArrayType *VAT = cast<VariableArrayType>(AT); 1511 return getVariableArrayType(NewEltTy, VAT->getSizeExpr(), 1512 VAT->getSizeModifier(), 1513 VAT->getIndexTypeQualifier()); 1514} 1515 1516 1517const ArrayType *ASTContext::getAsArrayType(QualType T) { 1518 // Handle the non-qualified case efficiently. 1519 if (T.getCVRQualifiers() == 0) { 1520 // Handle the common positive case fast. 1521 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 1522 return AT; 1523 } 1524 1525 // Handle the common negative case fast, ignoring CVR qualifiers. 1526 QualType CType = T->getCanonicalTypeInternal(); 1527 1528 // Make sure to look through type qualifiers (like ExtQuals) for the negative 1529 // test. 1530 if (!isa<ArrayType>(CType) && 1531 !isa<ArrayType>(CType.getUnqualifiedType())) 1532 return 0; 1533 1534 // Apply any CVR qualifiers from the array type to the element type. This 1535 // implements C99 6.7.3p8: "If the specification of an array type includes 1536 // any type qualifiers, the element type is so qualified, not the array type." 1537 1538 // If we get here, we either have type qualifiers on the type, or we have 1539 // sugar such as a typedef in the way. If we have type qualifiers on the type 1540 // we must propagate them down into the elemeng type. 1541 unsigned CVRQuals = T.getCVRQualifiers(); 1542 unsigned AddrSpace = 0; 1543 Type *Ty = T.getTypePtr(); 1544 1545 // Rip through ExtQualType's and typedefs to get to a concrete type. 1546 while (1) { 1547 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(Ty)) { 1548 AddrSpace = EXTQT->getAddressSpace(); 1549 Ty = EXTQT->getBaseType(); 1550 } else { 1551 T = Ty->getDesugaredType(); 1552 if (T.getTypePtr() == Ty && T.getCVRQualifiers() == 0) 1553 break; 1554 CVRQuals |= T.getCVRQualifiers(); 1555 Ty = T.getTypePtr(); 1556 } 1557 } 1558 1559 // If we have a simple case, just return now. 1560 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 1561 if (ATy == 0 || (AddrSpace == 0 && CVRQuals == 0)) 1562 return ATy; 1563 1564 // Otherwise, we have an array and we have qualifiers on it. Push the 1565 // qualifiers into the array element type and return a new array type. 1566 // Get the canonical version of the element with the extra qualifiers on it. 1567 // This can recursively sink qualifiers through multiple levels of arrays. 1568 QualType NewEltTy = ATy->getElementType(); 1569 if (AddrSpace) 1570 NewEltTy = getAddrSpaceQualType(NewEltTy, AddrSpace); 1571 NewEltTy = NewEltTy.getWithAdditionalQualifiers(CVRQuals); 1572 1573 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 1574 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 1575 CAT->getSizeModifier(), 1576 CAT->getIndexTypeQualifier())); 1577 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 1578 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 1579 IAT->getSizeModifier(), 1580 IAT->getIndexTypeQualifier())); 1581 1582 if (const DependentSizedArrayType *DSAT 1583 = dyn_cast<DependentSizedArrayType>(ATy)) 1584 return cast<ArrayType>( 1585 getDependentSizedArrayType(NewEltTy, 1586 DSAT->getSizeExpr(), 1587 DSAT->getSizeModifier(), 1588 DSAT->getIndexTypeQualifier())); 1589 1590 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 1591 return cast<ArrayType>(getVariableArrayType(NewEltTy, VAT->getSizeExpr(), 1592 VAT->getSizeModifier(), 1593 VAT->getIndexTypeQualifier())); 1594} 1595 1596 1597/// getArrayDecayedType - Return the properly qualified result of decaying the 1598/// specified array type to a pointer. This operation is non-trivial when 1599/// handling typedefs etc. The canonical type of "T" must be an array type, 1600/// this returns a pointer to a properly qualified element of the array. 1601/// 1602/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 1603QualType ASTContext::getArrayDecayedType(QualType Ty) { 1604 // Get the element type with 'getAsArrayType' so that we don't lose any 1605 // typedefs in the element type of the array. This also handles propagation 1606 // of type qualifiers from the array type into the element type if present 1607 // (C99 6.7.3p8). 1608 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 1609 assert(PrettyArrayType && "Not an array type!"); 1610 1611 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 1612 1613 // int x[restrict 4] -> int *restrict 1614 return PtrTy.getQualifiedType(PrettyArrayType->getIndexTypeQualifier()); 1615} 1616 1617QualType ASTContext::getBaseElementType(const VariableArrayType *VAT) { 1618 QualType ElemTy = VAT->getElementType(); 1619 1620 if (const VariableArrayType *VAT = getAsVariableArrayType(ElemTy)) 1621 return getBaseElementType(VAT); 1622 1623 return ElemTy; 1624} 1625 1626/// getFloatingRank - Return a relative rank for floating point types. 1627/// This routine will assert if passed a built-in type that isn't a float. 1628static FloatingRank getFloatingRank(QualType T) { 1629 if (const ComplexType *CT = T->getAsComplexType()) 1630 return getFloatingRank(CT->getElementType()); 1631 1632 assert(T->getAsBuiltinType() && "getFloatingRank(): not a floating type"); 1633 switch (T->getAsBuiltinType()->getKind()) { 1634 default: assert(0 && "getFloatingRank(): not a floating type"); 1635 case BuiltinType::Float: return FloatRank; 1636 case BuiltinType::Double: return DoubleRank; 1637 case BuiltinType::LongDouble: return LongDoubleRank; 1638 } 1639} 1640 1641/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 1642/// point or a complex type (based on typeDomain/typeSize). 1643/// 'typeDomain' is a real floating point or complex type. 1644/// 'typeSize' is a real floating point or complex type. 1645QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 1646 QualType Domain) const { 1647 FloatingRank EltRank = getFloatingRank(Size); 1648 if (Domain->isComplexType()) { 1649 switch (EltRank) { 1650 default: assert(0 && "getFloatingRank(): illegal value for rank"); 1651 case FloatRank: return FloatComplexTy; 1652 case DoubleRank: return DoubleComplexTy; 1653 case LongDoubleRank: return LongDoubleComplexTy; 1654 } 1655 } 1656 1657 assert(Domain->isRealFloatingType() && "Unknown domain!"); 1658 switch (EltRank) { 1659 default: assert(0 && "getFloatingRank(): illegal value for rank"); 1660 case FloatRank: return FloatTy; 1661 case DoubleRank: return DoubleTy; 1662 case LongDoubleRank: return LongDoubleTy; 1663 } 1664} 1665 1666/// getFloatingTypeOrder - Compare the rank of the two specified floating 1667/// point types, ignoring the domain of the type (i.e. 'double' == 1668/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 1669/// LHS < RHS, return -1. 1670int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 1671 FloatingRank LHSR = getFloatingRank(LHS); 1672 FloatingRank RHSR = getFloatingRank(RHS); 1673 1674 if (LHSR == RHSR) 1675 return 0; 1676 if (LHSR > RHSR) 1677 return 1; 1678 return -1; 1679} 1680 1681/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 1682/// routine will assert if passed a built-in type that isn't an integer or enum, 1683/// or if it is not canonicalized. 1684unsigned ASTContext::getIntegerRank(Type *T) { 1685 assert(T->isCanonical() && "T should be canonicalized"); 1686 if (EnumType* ET = dyn_cast<EnumType>(T)) 1687 T = ET->getDecl()->getIntegerType().getTypePtr(); 1688 1689 // There are two things which impact the integer rank: the width, and 1690 // the ordering of builtins. The builtin ordering is encoded in the 1691 // bottom three bits; the width is encoded in the bits above that. 1692 if (FixedWidthIntType* FWIT = dyn_cast<FixedWidthIntType>(T)) { 1693 return FWIT->getWidth() << 3; 1694 } 1695 1696 switch (cast<BuiltinType>(T)->getKind()) { 1697 default: assert(0 && "getIntegerRank(): not a built-in integer"); 1698 case BuiltinType::Bool: 1699 return 1 + (getIntWidth(BoolTy) << 3); 1700 case BuiltinType::Char_S: 1701 case BuiltinType::Char_U: 1702 case BuiltinType::SChar: 1703 case BuiltinType::UChar: 1704 return 2 + (getIntWidth(CharTy) << 3); 1705 case BuiltinType::Short: 1706 case BuiltinType::UShort: 1707 return 3 + (getIntWidth(ShortTy) << 3); 1708 case BuiltinType::Int: 1709 case BuiltinType::UInt: 1710 return 4 + (getIntWidth(IntTy) << 3); 1711 case BuiltinType::Long: 1712 case BuiltinType::ULong: 1713 return 5 + (getIntWidth(LongTy) << 3); 1714 case BuiltinType::LongLong: 1715 case BuiltinType::ULongLong: 1716 return 6 + (getIntWidth(LongLongTy) << 3); 1717 } 1718} 1719 1720/// getIntegerTypeOrder - Returns the highest ranked integer type: 1721/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 1722/// LHS < RHS, return -1. 1723int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 1724 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 1725 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 1726 if (LHSC == RHSC) return 0; 1727 1728 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 1729 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 1730 1731 unsigned LHSRank = getIntegerRank(LHSC); 1732 unsigned RHSRank = getIntegerRank(RHSC); 1733 1734 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 1735 if (LHSRank == RHSRank) return 0; 1736 return LHSRank > RHSRank ? 1 : -1; 1737 } 1738 1739 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 1740 if (LHSUnsigned) { 1741 // If the unsigned [LHS] type is larger, return it. 1742 if (LHSRank >= RHSRank) 1743 return 1; 1744 1745 // If the signed type can represent all values of the unsigned type, it 1746 // wins. Because we are dealing with 2's complement and types that are 1747 // powers of two larger than each other, this is always safe. 1748 return -1; 1749 } 1750 1751 // If the unsigned [RHS] type is larger, return it. 1752 if (RHSRank >= LHSRank) 1753 return -1; 1754 1755 // If the signed type can represent all values of the unsigned type, it 1756 // wins. Because we are dealing with 2's complement and types that are 1757 // powers of two larger than each other, this is always safe. 1758 return 1; 1759} 1760 1761// getCFConstantStringType - Return the type used for constant CFStrings. 1762QualType ASTContext::getCFConstantStringType() { 1763 if (!CFConstantStringTypeDecl) { 1764 CFConstantStringTypeDecl = 1765 RecordDecl::Create(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 1766 &Idents.get("NSConstantString")); 1767 QualType FieldTypes[4]; 1768 1769 // const int *isa; 1770 FieldTypes[0] = getPointerType(IntTy.getQualifiedType(QualType::Const)); 1771 // int flags; 1772 FieldTypes[1] = IntTy; 1773 // const char *str; 1774 FieldTypes[2] = getPointerType(CharTy.getQualifiedType(QualType::Const)); 1775 // long length; 1776 FieldTypes[3] = LongTy; 1777 1778 // Create fields 1779 for (unsigned i = 0; i < 4; ++i) { 1780 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 1781 SourceLocation(), 0, 1782 FieldTypes[i], /*BitWidth=*/0, 1783 /*Mutable=*/false); 1784 CFConstantStringTypeDecl->addDecl(Field); 1785 } 1786 1787 CFConstantStringTypeDecl->completeDefinition(*this); 1788 } 1789 1790 return getTagDeclType(CFConstantStringTypeDecl); 1791} 1792 1793QualType ASTContext::getObjCFastEnumerationStateType() 1794{ 1795 if (!ObjCFastEnumerationStateTypeDecl) { 1796 ObjCFastEnumerationStateTypeDecl = 1797 RecordDecl::Create(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 1798 &Idents.get("__objcFastEnumerationState")); 1799 1800 QualType FieldTypes[] = { 1801 UnsignedLongTy, 1802 getPointerType(ObjCIdType), 1803 getPointerType(UnsignedLongTy), 1804 getConstantArrayType(UnsignedLongTy, 1805 llvm::APInt(32, 5), ArrayType::Normal, 0) 1806 }; 1807 1808 for (size_t i = 0; i < 4; ++i) { 1809 FieldDecl *Field = FieldDecl::Create(*this, 1810 ObjCFastEnumerationStateTypeDecl, 1811 SourceLocation(), 0, 1812 FieldTypes[i], /*BitWidth=*/0, 1813 /*Mutable=*/false); 1814 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 1815 } 1816 1817 ObjCFastEnumerationStateTypeDecl->completeDefinition(*this); 1818 } 1819 1820 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 1821} 1822 1823// This returns true if a type has been typedefed to BOOL: 1824// typedef <type> BOOL; 1825static bool isTypeTypedefedAsBOOL(QualType T) { 1826 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 1827 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 1828 return II->isStr("BOOL"); 1829 1830 return false; 1831} 1832 1833/// getObjCEncodingTypeSize returns size of type for objective-c encoding 1834/// purpose. 1835int ASTContext::getObjCEncodingTypeSize(QualType type) { 1836 uint64_t sz = getTypeSize(type); 1837 1838 // Make all integer and enum types at least as large as an int 1839 if (sz > 0 && type->isIntegralType()) 1840 sz = std::max(sz, getTypeSize(IntTy)); 1841 // Treat arrays as pointers, since that's how they're passed in. 1842 else if (type->isArrayType()) 1843 sz = getTypeSize(VoidPtrTy); 1844 return sz / getTypeSize(CharTy); 1845} 1846 1847/// getObjCEncodingForMethodDecl - Return the encoded type for this method 1848/// declaration. 1849void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 1850 std::string& S) { 1851 // FIXME: This is not very efficient. 1852 // Encode type qualifer, 'in', 'inout', etc. for the return type. 1853 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 1854 // Encode result type. 1855 getObjCEncodingForType(Decl->getResultType(), S); 1856 // Compute size of all parameters. 1857 // Start with computing size of a pointer in number of bytes. 1858 // FIXME: There might(should) be a better way of doing this computation! 1859 SourceLocation Loc; 1860 int PtrSize = getTypeSize(VoidPtrTy) / getTypeSize(CharTy); 1861 // The first two arguments (self and _cmd) are pointers; account for 1862 // their size. 1863 int ParmOffset = 2 * PtrSize; 1864 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 1865 E = Decl->param_end(); PI != E; ++PI) { 1866 QualType PType = (*PI)->getType(); 1867 int sz = getObjCEncodingTypeSize(PType); 1868 assert (sz > 0 && "getObjCEncodingForMethodDecl - Incomplete param type"); 1869 ParmOffset += sz; 1870 } 1871 S += llvm::utostr(ParmOffset); 1872 S += "@0:"; 1873 S += llvm::utostr(PtrSize); 1874 1875 // Argument types. 1876 ParmOffset = 2 * PtrSize; 1877 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 1878 E = Decl->param_end(); PI != E; ++PI) { 1879 ParmVarDecl *PVDecl = *PI; 1880 QualType PType = PVDecl->getOriginalType(); 1881 if (const ArrayType *AT = 1882 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) 1883 // Use array's original type only if it has known number of 1884 // elements. 1885 if (!dyn_cast<ConstantArrayType>(AT)) 1886 PType = PVDecl->getType(); 1887 // Process argument qualifiers for user supplied arguments; such as, 1888 // 'in', 'inout', etc. 1889 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 1890 getObjCEncodingForType(PType, S); 1891 S += llvm::utostr(ParmOffset); 1892 ParmOffset += getObjCEncodingTypeSize(PType); 1893 } 1894} 1895 1896/// getObjCEncodingForPropertyDecl - Return the encoded type for this 1897/// property declaration. If non-NULL, Container must be either an 1898/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 1899/// NULL when getting encodings for protocol properties. 1900/// Property attributes are stored as a comma-delimited C string. The simple 1901/// attributes readonly and bycopy are encoded as single characters. The 1902/// parametrized attributes, getter=name, setter=name, and ivar=name, are 1903/// encoded as single characters, followed by an identifier. Property types 1904/// are also encoded as a parametrized attribute. The characters used to encode 1905/// these attributes are defined by the following enumeration: 1906/// @code 1907/// enum PropertyAttributes { 1908/// kPropertyReadOnly = 'R', // property is read-only. 1909/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 1910/// kPropertyByref = '&', // property is a reference to the value last assigned 1911/// kPropertyDynamic = 'D', // property is dynamic 1912/// kPropertyGetter = 'G', // followed by getter selector name 1913/// kPropertySetter = 'S', // followed by setter selector name 1914/// kPropertyInstanceVariable = 'V' // followed by instance variable name 1915/// kPropertyType = 't' // followed by old-style type encoding. 1916/// kPropertyWeak = 'W' // 'weak' property 1917/// kPropertyStrong = 'P' // property GC'able 1918/// kPropertyNonAtomic = 'N' // property non-atomic 1919/// }; 1920/// @endcode 1921void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 1922 const Decl *Container, 1923 std::string& S) { 1924 // Collect information from the property implementation decl(s). 1925 bool Dynamic = false; 1926 ObjCPropertyImplDecl *SynthesizePID = 0; 1927 1928 // FIXME: Duplicated code due to poor abstraction. 1929 if (Container) { 1930 if (const ObjCCategoryImplDecl *CID = 1931 dyn_cast<ObjCCategoryImplDecl>(Container)) { 1932 for (ObjCCategoryImplDecl::propimpl_iterator 1933 i = CID->propimpl_begin(), e = CID->propimpl_end(); i != e; ++i) { 1934 ObjCPropertyImplDecl *PID = *i; 1935 if (PID->getPropertyDecl() == PD) { 1936 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 1937 Dynamic = true; 1938 } else { 1939 SynthesizePID = PID; 1940 } 1941 } 1942 } 1943 } else { 1944 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 1945 for (ObjCCategoryImplDecl::propimpl_iterator 1946 i = OID->propimpl_begin(), e = OID->propimpl_end(); i != e; ++i) { 1947 ObjCPropertyImplDecl *PID = *i; 1948 if (PID->getPropertyDecl() == PD) { 1949 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 1950 Dynamic = true; 1951 } else { 1952 SynthesizePID = PID; 1953 } 1954 } 1955 } 1956 } 1957 } 1958 1959 // FIXME: This is not very efficient. 1960 S = "T"; 1961 1962 // Encode result type. 1963 // GCC has some special rules regarding encoding of properties which 1964 // closely resembles encoding of ivars. 1965 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, NULL, 1966 true /* outermost type */, 1967 true /* encoding for property */); 1968 1969 if (PD->isReadOnly()) { 1970 S += ",R"; 1971 } else { 1972 switch (PD->getSetterKind()) { 1973 case ObjCPropertyDecl::Assign: break; 1974 case ObjCPropertyDecl::Copy: S += ",C"; break; 1975 case ObjCPropertyDecl::Retain: S += ",&"; break; 1976 } 1977 } 1978 1979 // It really isn't clear at all what this means, since properties 1980 // are "dynamic by default". 1981 if (Dynamic) 1982 S += ",D"; 1983 1984 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 1985 S += ",N"; 1986 1987 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 1988 S += ",G"; 1989 S += PD->getGetterName().getAsString(); 1990 } 1991 1992 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 1993 S += ",S"; 1994 S += PD->getSetterName().getAsString(); 1995 } 1996 1997 if (SynthesizePID) { 1998 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 1999 S += ",V"; 2000 S += OID->getNameAsString(); 2001 } 2002 2003 // FIXME: OBJCGC: weak & strong 2004} 2005 2006/// getLegacyIntegralTypeEncoding - 2007/// Another legacy compatibility encoding: 32-bit longs are encoded as 2008/// 'l' or 'L' , but not always. For typedefs, we need to use 2009/// 'i' or 'I' instead if encoding a struct field, or a pointer! 2010/// 2011void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 2012 if (dyn_cast<TypedefType>(PointeeTy.getTypePtr())) { 2013 if (const BuiltinType *BT = PointeeTy->getAsBuiltinType()) { 2014 if (BT->getKind() == BuiltinType::ULong && 2015 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 2016 PointeeTy = UnsignedIntTy; 2017 else 2018 if (BT->getKind() == BuiltinType::Long && 2019 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 2020 PointeeTy = IntTy; 2021 } 2022 } 2023} 2024 2025void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 2026 FieldDecl *Field) const { 2027 // We follow the behavior of gcc, expanding structures which are 2028 // directly pointed to, and expanding embedded structures. Note that 2029 // these rules are sufficient to prevent recursive encoding of the 2030 // same type. 2031 getObjCEncodingForTypeImpl(T, S, true, true, Field, 2032 true /* outermost type */); 2033} 2034 2035static void EncodeBitField(const ASTContext *Context, std::string& S, 2036 FieldDecl *FD) { 2037 const Expr *E = FD->getBitWidth(); 2038 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 2039 ASTContext *Ctx = const_cast<ASTContext*>(Context); 2040 unsigned N = E->getIntegerConstantExprValue(*Ctx).getZExtValue(); 2041 S += 'b'; 2042 S += llvm::utostr(N); 2043} 2044 2045void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 2046 bool ExpandPointedToStructures, 2047 bool ExpandStructures, 2048 FieldDecl *FD, 2049 bool OutermostType, 2050 bool EncodingProperty) const { 2051 if (const BuiltinType *BT = T->getAsBuiltinType()) { 2052 if (FD && FD->isBitField()) { 2053 EncodeBitField(this, S, FD); 2054 } 2055 else { 2056 char encoding; 2057 switch (BT->getKind()) { 2058 default: assert(0 && "Unhandled builtin type kind"); 2059 case BuiltinType::Void: encoding = 'v'; break; 2060 case BuiltinType::Bool: encoding = 'B'; break; 2061 case BuiltinType::Char_U: 2062 case BuiltinType::UChar: encoding = 'C'; break; 2063 case BuiltinType::UShort: encoding = 'S'; break; 2064 case BuiltinType::UInt: encoding = 'I'; break; 2065 case BuiltinType::ULong: 2066 encoding = 2067 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'L' : 'Q'; 2068 break; 2069 case BuiltinType::ULongLong: encoding = 'Q'; break; 2070 case BuiltinType::Char_S: 2071 case BuiltinType::SChar: encoding = 'c'; break; 2072 case BuiltinType::Short: encoding = 's'; break; 2073 case BuiltinType::Int: encoding = 'i'; break; 2074 case BuiltinType::Long: 2075 encoding = 2076 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'l' : 'q'; 2077 break; 2078 case BuiltinType::LongLong: encoding = 'q'; break; 2079 case BuiltinType::Float: encoding = 'f'; break; 2080 case BuiltinType::Double: encoding = 'd'; break; 2081 case BuiltinType::LongDouble: encoding = 'd'; break; 2082 } 2083 2084 S += encoding; 2085 } 2086 } 2087 else if (T->isObjCQualifiedIdType()) { 2088 getObjCEncodingForTypeImpl(getObjCIdType(), S, 2089 ExpandPointedToStructures, 2090 ExpandStructures, FD); 2091 if (FD || EncodingProperty) { 2092 // Note that we do extended encoding of protocol qualifer list 2093 // Only when doing ivar or property encoding. 2094 const ObjCQualifiedIdType *QIDT = T->getAsObjCQualifiedIdType(); 2095 S += '"'; 2096 for (unsigned i =0; i < QIDT->getNumProtocols(); i++) { 2097 ObjCProtocolDecl *Proto = QIDT->getProtocols(i); 2098 S += '<'; 2099 S += Proto->getNameAsString(); 2100 S += '>'; 2101 } 2102 S += '"'; 2103 } 2104 return; 2105 } 2106 else if (const PointerType *PT = T->getAsPointerType()) { 2107 QualType PointeeTy = PT->getPointeeType(); 2108 bool isReadOnly = false; 2109 // For historical/compatibility reasons, the read-only qualifier of the 2110 // pointee gets emitted _before_ the '^'. The read-only qualifier of 2111 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 2112 // Also, do not emit the 'r' for anything but the outermost type! 2113 if (dyn_cast<TypedefType>(T.getTypePtr())) { 2114 if (OutermostType && T.isConstQualified()) { 2115 isReadOnly = true; 2116 S += 'r'; 2117 } 2118 } 2119 else if (OutermostType) { 2120 QualType P = PointeeTy; 2121 while (P->getAsPointerType()) 2122 P = P->getAsPointerType()->getPointeeType(); 2123 if (P.isConstQualified()) { 2124 isReadOnly = true; 2125 S += 'r'; 2126 } 2127 } 2128 if (isReadOnly) { 2129 // Another legacy compatibility encoding. Some ObjC qualifier and type 2130 // combinations need to be rearranged. 2131 // Rewrite "in const" from "nr" to "rn" 2132 const char * s = S.c_str(); 2133 int len = S.length(); 2134 if (len >= 2 && s[len-2] == 'n' && s[len-1] == 'r') { 2135 std::string replace = "rn"; 2136 S.replace(S.end()-2, S.end(), replace); 2137 } 2138 } 2139 if (isObjCIdStructType(PointeeTy)) { 2140 S += '@'; 2141 return; 2142 } 2143 else if (PointeeTy->isObjCInterfaceType()) { 2144 if (!EncodingProperty && 2145 isa<TypedefType>(PointeeTy.getTypePtr())) { 2146 // Another historical/compatibility reason. 2147 // We encode the underlying type which comes out as 2148 // {...}; 2149 S += '^'; 2150 getObjCEncodingForTypeImpl(PointeeTy, S, 2151 false, ExpandPointedToStructures, 2152 NULL); 2153 return; 2154 } 2155 S += '@'; 2156 if (FD || EncodingProperty) { 2157 const ObjCInterfaceType *OIT = 2158 PointeeTy.getUnqualifiedType()->getAsObjCInterfaceType(); 2159 ObjCInterfaceDecl *OI = OIT->getDecl(); 2160 S += '"'; 2161 S += OI->getNameAsCString(); 2162 for (unsigned i =0; i < OIT->getNumProtocols(); i++) { 2163 ObjCProtocolDecl *Proto = OIT->getProtocol(i); 2164 S += '<'; 2165 S += Proto->getNameAsString(); 2166 S += '>'; 2167 } 2168 S += '"'; 2169 } 2170 return; 2171 } else if (isObjCClassStructType(PointeeTy)) { 2172 S += '#'; 2173 return; 2174 } else if (isObjCSelType(PointeeTy)) { 2175 S += ':'; 2176 return; 2177 } 2178 2179 if (PointeeTy->isCharType()) { 2180 // char pointer types should be encoded as '*' unless it is a 2181 // type that has been typedef'd to 'BOOL'. 2182 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 2183 S += '*'; 2184 return; 2185 } 2186 } 2187 2188 S += '^'; 2189 getLegacyIntegralTypeEncoding(PointeeTy); 2190 2191 getObjCEncodingForTypeImpl(PointeeTy, S, 2192 false, ExpandPointedToStructures, 2193 NULL); 2194 } else if (const ArrayType *AT = 2195 // Ignore type qualifiers etc. 2196 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 2197 if (isa<IncompleteArrayType>(AT)) { 2198 // Incomplete arrays are encoded as a pointer to the array element. 2199 S += '^'; 2200 2201 getObjCEncodingForTypeImpl(AT->getElementType(), S, 2202 false, ExpandStructures, FD); 2203 } else { 2204 S += '['; 2205 2206 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2207 S += llvm::utostr(CAT->getSize().getZExtValue()); 2208 else { 2209 //Variable length arrays are encoded as a regular array with 0 elements. 2210 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 2211 S += '0'; 2212 } 2213 2214 getObjCEncodingForTypeImpl(AT->getElementType(), S, 2215 false, ExpandStructures, FD); 2216 S += ']'; 2217 } 2218 } else if (T->getAsFunctionType()) { 2219 S += '?'; 2220 } else if (const RecordType *RTy = T->getAsRecordType()) { 2221 RecordDecl *RDecl = RTy->getDecl(); 2222 S += RDecl->isUnion() ? '(' : '{'; 2223 // Anonymous structures print as '?' 2224 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 2225 S += II->getName(); 2226 } else { 2227 S += '?'; 2228 } 2229 if (ExpandStructures) { 2230 S += '='; 2231 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 2232 FieldEnd = RDecl->field_end(); 2233 Field != FieldEnd; ++Field) { 2234 if (FD) { 2235 S += '"'; 2236 S += Field->getNameAsString(); 2237 S += '"'; 2238 } 2239 2240 // Special case bit-fields. 2241 if (Field->isBitField()) { 2242 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 2243 (*Field)); 2244 } else { 2245 QualType qt = Field->getType(); 2246 getLegacyIntegralTypeEncoding(qt); 2247 getObjCEncodingForTypeImpl(qt, S, false, true, 2248 FD); 2249 } 2250 } 2251 } 2252 S += RDecl->isUnion() ? ')' : '}'; 2253 } else if (T->isEnumeralType()) { 2254 if (FD && FD->isBitField()) 2255 EncodeBitField(this, S, FD); 2256 else 2257 S += 'i'; 2258 } else if (T->isBlockPointerType()) { 2259 S += "@?"; // Unlike a pointer-to-function, which is "^?". 2260 } else if (T->isObjCInterfaceType()) { 2261 // @encode(class_name) 2262 ObjCInterfaceDecl *OI = T->getAsObjCInterfaceType()->getDecl(); 2263 S += '{'; 2264 const IdentifierInfo *II = OI->getIdentifier(); 2265 S += II->getName(); 2266 S += '='; 2267 std::vector<FieldDecl*> RecFields; 2268 CollectObjCIvars(OI, RecFields); 2269 for (unsigned int i = 0; i != RecFields.size(); i++) { 2270 if (RecFields[i]->isBitField()) 2271 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 2272 RecFields[i]); 2273 else 2274 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 2275 FD); 2276 } 2277 S += '}'; 2278 } 2279 else 2280 assert(0 && "@encode for type not implemented!"); 2281} 2282 2283void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 2284 std::string& S) const { 2285 if (QT & Decl::OBJC_TQ_In) 2286 S += 'n'; 2287 if (QT & Decl::OBJC_TQ_Inout) 2288 S += 'N'; 2289 if (QT & Decl::OBJC_TQ_Out) 2290 S += 'o'; 2291 if (QT & Decl::OBJC_TQ_Bycopy) 2292 S += 'O'; 2293 if (QT & Decl::OBJC_TQ_Byref) 2294 S += 'R'; 2295 if (QT & Decl::OBJC_TQ_Oneway) 2296 S += 'V'; 2297} 2298 2299void ASTContext::setBuiltinVaListType(QualType T) 2300{ 2301 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 2302 2303 BuiltinVaListType = T; 2304} 2305 2306void ASTContext::setObjCIdType(TypedefDecl *TD) 2307{ 2308 ObjCIdType = getTypedefType(TD); 2309 2310 // typedef struct objc_object *id; 2311 const PointerType *ptr = TD->getUnderlyingType()->getAsPointerType(); 2312 // User error - caller will issue diagnostics. 2313 if (!ptr) 2314 return; 2315 const RecordType *rec = ptr->getPointeeType()->getAsStructureType(); 2316 // User error - caller will issue diagnostics. 2317 if (!rec) 2318 return; 2319 IdStructType = rec; 2320} 2321 2322void ASTContext::setObjCSelType(TypedefDecl *TD) 2323{ 2324 ObjCSelType = getTypedefType(TD); 2325 2326 // typedef struct objc_selector *SEL; 2327 const PointerType *ptr = TD->getUnderlyingType()->getAsPointerType(); 2328 if (!ptr) 2329 return; 2330 const RecordType *rec = ptr->getPointeeType()->getAsStructureType(); 2331 if (!rec) 2332 return; 2333 SelStructType = rec; 2334} 2335 2336void ASTContext::setObjCProtoType(QualType QT) 2337{ 2338 ObjCProtoType = QT; 2339} 2340 2341void ASTContext::setObjCClassType(TypedefDecl *TD) 2342{ 2343 ObjCClassType = getTypedefType(TD); 2344 2345 // typedef struct objc_class *Class; 2346 const PointerType *ptr = TD->getUnderlyingType()->getAsPointerType(); 2347 assert(ptr && "'Class' incorrectly typed"); 2348 const RecordType *rec = ptr->getPointeeType()->getAsStructureType(); 2349 assert(rec && "'Class' incorrectly typed"); 2350 ClassStructType = rec; 2351} 2352 2353void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 2354 assert(ObjCConstantStringType.isNull() && 2355 "'NSConstantString' type already set!"); 2356 2357 ObjCConstantStringType = getObjCInterfaceType(Decl); 2358} 2359 2360/// getFromTargetType - Given one of the integer types provided by 2361/// TargetInfo, produce the corresponding type. The unsigned @p Type 2362/// is actually a value of type @c TargetInfo::IntType. 2363QualType ASTContext::getFromTargetType(unsigned Type) const { 2364 switch (Type) { 2365 case TargetInfo::NoInt: return QualType(); 2366 case TargetInfo::SignedShort: return ShortTy; 2367 case TargetInfo::UnsignedShort: return UnsignedShortTy; 2368 case TargetInfo::SignedInt: return IntTy; 2369 case TargetInfo::UnsignedInt: return UnsignedIntTy; 2370 case TargetInfo::SignedLong: return LongTy; 2371 case TargetInfo::UnsignedLong: return UnsignedLongTy; 2372 case TargetInfo::SignedLongLong: return LongLongTy; 2373 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 2374 } 2375 2376 assert(false && "Unhandled TargetInfo::IntType value"); 2377 return QualType(); 2378} 2379 2380//===----------------------------------------------------------------------===// 2381// Type Predicates. 2382//===----------------------------------------------------------------------===// 2383 2384/// isObjCNSObjectType - Return true if this is an NSObject object using 2385/// NSObject attribute on a c-style pointer type. 2386/// FIXME - Make it work directly on types. 2387/// 2388bool ASTContext::isObjCNSObjectType(QualType Ty) const { 2389 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 2390 if (TypedefDecl *TD = TDT->getDecl()) 2391 if (TD->getAttr<ObjCNSObjectAttr>()) 2392 return true; 2393 } 2394 return false; 2395} 2396 2397/// isObjCObjectPointerType - Returns true if type is an Objective-C pointer 2398/// to an object type. This includes "id" and "Class" (two 'special' pointers 2399/// to struct), Interface* (pointer to ObjCInterfaceType) and id<P> (qualified 2400/// ID type). 2401bool ASTContext::isObjCObjectPointerType(QualType Ty) const { 2402 if (Ty->isObjCQualifiedIdType()) 2403 return true; 2404 2405 // Blocks are objects. 2406 if (Ty->isBlockPointerType()) 2407 return true; 2408 2409 // All other object types are pointers. 2410 if (!Ty->isPointerType()) 2411 return false; 2412 2413 // Check to see if this is 'id' or 'Class', both of which are typedefs for 2414 // pointer types. This looks for the typedef specifically, not for the 2415 // underlying type. 2416 if (Ty == getObjCIdType() || Ty == getObjCClassType()) 2417 return true; 2418 2419 // If this a pointer to an interface (e.g. NSString*), it is ok. 2420 if (Ty->getAsPointerType()->getPointeeType()->isObjCInterfaceType()) 2421 return true; 2422 2423 // If is has NSObject attribute, OK as well. 2424 return isObjCNSObjectType(Ty); 2425} 2426 2427/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 2428/// garbage collection attribute. 2429/// 2430QualType::GCAttrTypes ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 2431 QualType::GCAttrTypes GCAttrs = QualType::GCNone; 2432 if (getLangOptions().ObjC1 && 2433 getLangOptions().getGCMode() != LangOptions::NonGC) { 2434 GCAttrs = Ty.getObjCGCAttr(); 2435 // Default behavious under objective-c's gc is for objective-c pointers 2436 // (or pointers to them) be treated as though they were declared 2437 // as __strong. 2438 if (GCAttrs == QualType::GCNone) { 2439 if (isObjCObjectPointerType(Ty)) 2440 GCAttrs = QualType::Strong; 2441 else if (Ty->isPointerType()) 2442 return getObjCGCAttrKind(Ty->getAsPointerType()->getPointeeType()); 2443 } 2444 } 2445 return GCAttrs; 2446} 2447 2448//===----------------------------------------------------------------------===// 2449// Type Compatibility Testing 2450//===----------------------------------------------------------------------===// 2451 2452/// typesAreBlockCompatible - This routine is called when comparing two 2453/// block types. Types must be strictly compatible here. For example, 2454/// C unfortunately doesn't produce an error for the following: 2455/// 2456/// int (*emptyArgFunc)(); 2457/// int (*intArgList)(int) = emptyArgFunc; 2458/// 2459/// For blocks, we will produce an error for the following (similar to C++): 2460/// 2461/// int (^emptyArgBlock)(); 2462/// int (^intArgBlock)(int) = emptyArgBlock; 2463/// 2464/// FIXME: When the dust settles on this integration, fold this into mergeTypes. 2465/// 2466bool ASTContext::typesAreBlockCompatible(QualType lhs, QualType rhs) { 2467 const FunctionType *lbase = lhs->getAsFunctionType(); 2468 const FunctionType *rbase = rhs->getAsFunctionType(); 2469 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 2470 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 2471 if (lproto && rproto) 2472 return !mergeTypes(lhs, rhs).isNull(); 2473 return false; 2474} 2475 2476/// areCompatVectorTypes - Return true if the two specified vector types are 2477/// compatible. 2478static bool areCompatVectorTypes(const VectorType *LHS, 2479 const VectorType *RHS) { 2480 assert(LHS->isCanonical() && RHS->isCanonical()); 2481 return LHS->getElementType() == RHS->getElementType() && 2482 LHS->getNumElements() == RHS->getNumElements(); 2483} 2484 2485/// canAssignObjCInterfaces - Return true if the two interface types are 2486/// compatible for assignment from RHS to LHS. This handles validation of any 2487/// protocol qualifiers on the LHS or RHS. 2488/// 2489bool ASTContext::canAssignObjCInterfaces(const ObjCInterfaceType *LHS, 2490 const ObjCInterfaceType *RHS) { 2491 // Verify that the base decls are compatible: the RHS must be a subclass of 2492 // the LHS. 2493 if (!LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 2494 return false; 2495 2496 // RHS must have a superset of the protocols in the LHS. If the LHS is not 2497 // protocol qualified at all, then we are good. 2498 if (!isa<ObjCQualifiedInterfaceType>(LHS)) 2499 return true; 2500 2501 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 2502 // isn't a superset. 2503 if (!isa<ObjCQualifiedInterfaceType>(RHS)) 2504 return true; // FIXME: should return false! 2505 2506 // Finally, we must have two protocol-qualified interfaces. 2507 const ObjCQualifiedInterfaceType *LHSP =cast<ObjCQualifiedInterfaceType>(LHS); 2508 const ObjCQualifiedInterfaceType *RHSP =cast<ObjCQualifiedInterfaceType>(RHS); 2509 ObjCQualifiedInterfaceType::qual_iterator LHSPI = LHSP->qual_begin(); 2510 ObjCQualifiedInterfaceType::qual_iterator LHSPE = LHSP->qual_end(); 2511 ObjCQualifiedInterfaceType::qual_iterator RHSPI = RHSP->qual_begin(); 2512 ObjCQualifiedInterfaceType::qual_iterator RHSPE = RHSP->qual_end(); 2513 2514 // All protocols in LHS must have a presence in RHS. Since the protocol lists 2515 // are both sorted alphabetically and have no duplicates, we can scan RHS and 2516 // LHS in a single parallel scan until we run out of elements in LHS. 2517 assert(LHSPI != LHSPE && "Empty LHS protocol list?"); 2518 ObjCProtocolDecl *LHSProto = *LHSPI; 2519 2520 while (RHSPI != RHSPE) { 2521 ObjCProtocolDecl *RHSProto = *RHSPI++; 2522 // If the RHS has a protocol that the LHS doesn't, ignore it. 2523 if (RHSProto != LHSProto) 2524 continue; 2525 2526 // Otherwise, the RHS does have this element. 2527 ++LHSPI; 2528 if (LHSPI == LHSPE) 2529 return true; // All protocols in LHS exist in RHS. 2530 2531 LHSProto = *LHSPI; 2532 } 2533 2534 // If we got here, we didn't find one of the LHS's protocols in the RHS list. 2535 return false; 2536} 2537 2538bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 2539 // get the "pointed to" types 2540 const PointerType *LHSPT = LHS->getAsPointerType(); 2541 const PointerType *RHSPT = RHS->getAsPointerType(); 2542 2543 if (!LHSPT || !RHSPT) 2544 return false; 2545 2546 QualType lhptee = LHSPT->getPointeeType(); 2547 QualType rhptee = RHSPT->getPointeeType(); 2548 const ObjCInterfaceType* LHSIface = lhptee->getAsObjCInterfaceType(); 2549 const ObjCInterfaceType* RHSIface = rhptee->getAsObjCInterfaceType(); 2550 // ID acts sort of like void* for ObjC interfaces 2551 if (LHSIface && isObjCIdStructType(rhptee)) 2552 return true; 2553 if (RHSIface && isObjCIdStructType(lhptee)) 2554 return true; 2555 if (!LHSIface || !RHSIface) 2556 return false; 2557 return canAssignObjCInterfaces(LHSIface, RHSIface) || 2558 canAssignObjCInterfaces(RHSIface, LHSIface); 2559} 2560 2561/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 2562/// both shall have the identically qualified version of a compatible type. 2563/// C99 6.2.7p1: Two types have compatible types if their types are the 2564/// same. See 6.7.[2,3,5] for additional rules. 2565bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 2566 return !mergeTypes(LHS, RHS).isNull(); 2567} 2568 2569QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs) { 2570 const FunctionType *lbase = lhs->getAsFunctionType(); 2571 const FunctionType *rbase = rhs->getAsFunctionType(); 2572 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 2573 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 2574 bool allLTypes = true; 2575 bool allRTypes = true; 2576 2577 // Check return type 2578 QualType retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 2579 if (retType.isNull()) return QualType(); 2580 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 2581 allLTypes = false; 2582 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 2583 allRTypes = false; 2584 2585 if (lproto && rproto) { // two C99 style function prototypes 2586 unsigned lproto_nargs = lproto->getNumArgs(); 2587 unsigned rproto_nargs = rproto->getNumArgs(); 2588 2589 // Compatible functions must have the same number of arguments 2590 if (lproto_nargs != rproto_nargs) 2591 return QualType(); 2592 2593 // Variadic and non-variadic functions aren't compatible 2594 if (lproto->isVariadic() != rproto->isVariadic()) 2595 return QualType(); 2596 2597 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 2598 return QualType(); 2599 2600 // Check argument compatibility 2601 llvm::SmallVector<QualType, 10> types; 2602 for (unsigned i = 0; i < lproto_nargs; i++) { 2603 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 2604 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 2605 QualType argtype = mergeTypes(largtype, rargtype); 2606 if (argtype.isNull()) return QualType(); 2607 types.push_back(argtype); 2608 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 2609 allLTypes = false; 2610 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 2611 allRTypes = false; 2612 } 2613 if (allLTypes) return lhs; 2614 if (allRTypes) return rhs; 2615 return getFunctionType(retType, types.begin(), types.size(), 2616 lproto->isVariadic(), lproto->getTypeQuals()); 2617 } 2618 2619 if (lproto) allRTypes = false; 2620 if (rproto) allLTypes = false; 2621 2622 const FunctionProtoType *proto = lproto ? lproto : rproto; 2623 if (proto) { 2624 if (proto->isVariadic()) return QualType(); 2625 // Check that the types are compatible with the types that 2626 // would result from default argument promotions (C99 6.7.5.3p15). 2627 // The only types actually affected are promotable integer 2628 // types and floats, which would be passed as a different 2629 // type depending on whether the prototype is visible. 2630 unsigned proto_nargs = proto->getNumArgs(); 2631 for (unsigned i = 0; i < proto_nargs; ++i) { 2632 QualType argTy = proto->getArgType(i); 2633 if (argTy->isPromotableIntegerType() || 2634 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 2635 return QualType(); 2636 } 2637 2638 if (allLTypes) return lhs; 2639 if (allRTypes) return rhs; 2640 return getFunctionType(retType, proto->arg_type_begin(), 2641 proto->getNumArgs(), lproto->isVariadic(), 2642 lproto->getTypeQuals()); 2643 } 2644 2645 if (allLTypes) return lhs; 2646 if (allRTypes) return rhs; 2647 return getFunctionNoProtoType(retType); 2648} 2649 2650QualType ASTContext::mergeTypes(QualType LHS, QualType RHS) { 2651 // C++ [expr]: If an expression initially has the type "reference to T", the 2652 // type is adjusted to "T" prior to any further analysis, the expression 2653 // designates the object or function denoted by the reference, and the 2654 // expression is an lvalue. 2655 // FIXME: C++ shouldn't be going through here! The rules are different 2656 // enough that they should be handled separately. 2657 if (const ReferenceType *RT = LHS->getAsReferenceType()) 2658 LHS = RT->getPointeeType(); 2659 if (const ReferenceType *RT = RHS->getAsReferenceType()) 2660 RHS = RT->getPointeeType(); 2661 2662 QualType LHSCan = getCanonicalType(LHS), 2663 RHSCan = getCanonicalType(RHS); 2664 2665 // If two types are identical, they are compatible. 2666 if (LHSCan == RHSCan) 2667 return LHS; 2668 2669 // If the qualifiers are different, the types aren't compatible 2670 if (LHSCan.getCVRQualifiers() != RHSCan.getCVRQualifiers() || 2671 LHSCan.getAddressSpace() != RHSCan.getAddressSpace()) 2672 return QualType(); 2673 2674 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 2675 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 2676 2677 // We want to consider the two function types to be the same for these 2678 // comparisons, just force one to the other. 2679 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 2680 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 2681 2682 // Same as above for arrays 2683 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 2684 LHSClass = Type::ConstantArray; 2685 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 2686 RHSClass = Type::ConstantArray; 2687 2688 // Canonicalize ExtVector -> Vector. 2689 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 2690 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 2691 2692 // Consider qualified interfaces and interfaces the same. 2693 if (LHSClass == Type::ObjCQualifiedInterface) LHSClass = Type::ObjCInterface; 2694 if (RHSClass == Type::ObjCQualifiedInterface) RHSClass = Type::ObjCInterface; 2695 2696 // If the canonical type classes don't match. 2697 if (LHSClass != RHSClass) { 2698 const ObjCInterfaceType* LHSIface = LHS->getAsObjCInterfaceType(); 2699 const ObjCInterfaceType* RHSIface = RHS->getAsObjCInterfaceType(); 2700 2701 // ID acts sort of like void* for ObjC interfaces 2702 if (LHSIface && isObjCIdStructType(RHS)) 2703 return LHS; 2704 if (RHSIface && isObjCIdStructType(LHS)) 2705 return RHS; 2706 2707 // ID is compatible with all qualified id types. 2708 if (LHS->isObjCQualifiedIdType()) { 2709 if (const PointerType *PT = RHS->getAsPointerType()) { 2710 QualType pType = PT->getPointeeType(); 2711 if (isObjCIdStructType(pType)) 2712 return LHS; 2713 // FIXME: need to use ObjCQualifiedIdTypesAreCompatible(LHS, RHS, true). 2714 // Unfortunately, this API is part of Sema (which we don't have access 2715 // to. Need to refactor. The following check is insufficient, since we 2716 // need to make sure the class implements the protocol. 2717 if (pType->isObjCInterfaceType()) 2718 return LHS; 2719 } 2720 } 2721 if (RHS->isObjCQualifiedIdType()) { 2722 if (const PointerType *PT = LHS->getAsPointerType()) { 2723 QualType pType = PT->getPointeeType(); 2724 if (isObjCIdStructType(pType)) 2725 return RHS; 2726 // FIXME: need to use ObjCQualifiedIdTypesAreCompatible(LHS, RHS, true). 2727 // Unfortunately, this API is part of Sema (which we don't have access 2728 // to. Need to refactor. The following check is insufficient, since we 2729 // need to make sure the class implements the protocol. 2730 if (pType->isObjCInterfaceType()) 2731 return RHS; 2732 } 2733 } 2734 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 2735 // a signed integer type, or an unsigned integer type. 2736 if (const EnumType* ETy = LHS->getAsEnumType()) { 2737 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 2738 return RHS; 2739 } 2740 if (const EnumType* ETy = RHS->getAsEnumType()) { 2741 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 2742 return LHS; 2743 } 2744 2745 return QualType(); 2746 } 2747 2748 // The canonical type classes match. 2749 switch (LHSClass) { 2750#define TYPE(Class, Base) 2751#define ABSTRACT_TYPE(Class, Base) 2752#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 2753#define DEPENDENT_TYPE(Class, Base) case Type::Class: 2754#include "clang/AST/TypeNodes.def" 2755 assert(false && "Non-canonical and dependent types shouldn't get here"); 2756 return QualType(); 2757 2758 case Type::Reference: 2759 case Type::MemberPointer: 2760 assert(false && "C++ should never be in mergeTypes"); 2761 return QualType(); 2762 2763 case Type::IncompleteArray: 2764 case Type::VariableArray: 2765 case Type::FunctionProto: 2766 case Type::ExtVector: 2767 case Type::ObjCQualifiedInterface: 2768 assert(false && "Types are eliminated above"); 2769 return QualType(); 2770 2771 case Type::Pointer: 2772 { 2773 // Merge two pointer types, while trying to preserve typedef info 2774 QualType LHSPointee = LHS->getAsPointerType()->getPointeeType(); 2775 QualType RHSPointee = RHS->getAsPointerType()->getPointeeType(); 2776 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 2777 if (ResultType.isNull()) return QualType(); 2778 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 2779 return LHS; 2780 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 2781 return RHS; 2782 return getPointerType(ResultType); 2783 } 2784 case Type::BlockPointer: 2785 { 2786 // Merge two block pointer types, while trying to preserve typedef info 2787 QualType LHSPointee = LHS->getAsBlockPointerType()->getPointeeType(); 2788 QualType RHSPointee = RHS->getAsBlockPointerType()->getPointeeType(); 2789 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 2790 if (ResultType.isNull()) return QualType(); 2791 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 2792 return LHS; 2793 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 2794 return RHS; 2795 return getBlockPointerType(ResultType); 2796 } 2797 case Type::ConstantArray: 2798 { 2799 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 2800 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 2801 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 2802 return QualType(); 2803 2804 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 2805 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 2806 QualType ResultType = mergeTypes(LHSElem, RHSElem); 2807 if (ResultType.isNull()) return QualType(); 2808 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 2809 return LHS; 2810 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 2811 return RHS; 2812 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 2813 ArrayType::ArraySizeModifier(), 0); 2814 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 2815 ArrayType::ArraySizeModifier(), 0); 2816 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 2817 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 2818 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 2819 return LHS; 2820 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 2821 return RHS; 2822 if (LVAT) { 2823 // FIXME: This isn't correct! But tricky to implement because 2824 // the array's size has to be the size of LHS, but the type 2825 // has to be different. 2826 return LHS; 2827 } 2828 if (RVAT) { 2829 // FIXME: This isn't correct! But tricky to implement because 2830 // the array's size has to be the size of RHS, but the type 2831 // has to be different. 2832 return RHS; 2833 } 2834 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 2835 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 2836 return getIncompleteArrayType(ResultType, ArrayType::ArraySizeModifier(),0); 2837 } 2838 case Type::FunctionNoProto: 2839 return mergeFunctionTypes(LHS, RHS); 2840 case Type::Record: 2841 case Type::CXXRecord: 2842 case Type::Enum: 2843 // FIXME: Why are these compatible? 2844 if (isObjCIdStructType(LHS) && isObjCClassStructType(RHS)) return LHS; 2845 if (isObjCClassStructType(LHS) && isObjCIdStructType(RHS)) return LHS; 2846 return QualType(); 2847 case Type::Builtin: 2848 // Only exactly equal builtin types are compatible, which is tested above. 2849 return QualType(); 2850 case Type::Complex: 2851 // Distinct complex types are incompatible. 2852 return QualType(); 2853 case Type::Vector: 2854 if (areCompatVectorTypes(LHS->getAsVectorType(), RHS->getAsVectorType())) 2855 return LHS; 2856 return QualType(); 2857 case Type::ObjCInterface: { 2858 // Check if the interfaces are assignment compatible. 2859 const ObjCInterfaceType* LHSIface = LHS->getAsObjCInterfaceType(); 2860 const ObjCInterfaceType* RHSIface = RHS->getAsObjCInterfaceType(); 2861 if (LHSIface && RHSIface && 2862 canAssignObjCInterfaces(LHSIface, RHSIface)) 2863 return LHS; 2864 2865 return QualType(); 2866 } 2867 case Type::ObjCQualifiedId: 2868 // Distinct qualified id's are not compatible. 2869 return QualType(); 2870 } 2871 2872 return QualType(); 2873} 2874 2875//===----------------------------------------------------------------------===// 2876// Integer Predicates 2877//===----------------------------------------------------------------------===// 2878 2879unsigned ASTContext::getIntWidth(QualType T) { 2880 if (T == BoolTy) 2881 return 1; 2882 if (FixedWidthIntType* FWIT = dyn_cast<FixedWidthIntType>(T)) { 2883 return FWIT->getWidth(); 2884 } 2885 // For builtin types, just use the standard type sizing method 2886 return (unsigned)getTypeSize(T); 2887} 2888 2889QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 2890 assert(T->isSignedIntegerType() && "Unexpected type"); 2891 if (const EnumType* ETy = T->getAsEnumType()) 2892 T = ETy->getDecl()->getIntegerType(); 2893 const BuiltinType* BTy = T->getAsBuiltinType(); 2894 assert (BTy && "Unexpected signed integer type"); 2895 switch (BTy->getKind()) { 2896 case BuiltinType::Char_S: 2897 case BuiltinType::SChar: 2898 return UnsignedCharTy; 2899 case BuiltinType::Short: 2900 return UnsignedShortTy; 2901 case BuiltinType::Int: 2902 return UnsignedIntTy; 2903 case BuiltinType::Long: 2904 return UnsignedLongTy; 2905 case BuiltinType::LongLong: 2906 return UnsignedLongLongTy; 2907 default: 2908 assert(0 && "Unexpected signed integer type"); 2909 return QualType(); 2910 } 2911} 2912 2913 2914//===----------------------------------------------------------------------===// 2915// Serialization Support 2916//===----------------------------------------------------------------------===// 2917 2918/// Emit - Serialize an ASTContext object to Bitcode. 2919void ASTContext::Emit(llvm::Serializer& S) const { 2920 S.Emit(LangOpts); 2921 S.EmitRef(SourceMgr); 2922 S.EmitRef(Target); 2923 S.EmitRef(Idents); 2924 S.EmitRef(Selectors); 2925 2926 // Emit the size of the type vector so that we can reserve that size 2927 // when we reconstitute the ASTContext object. 2928 S.EmitInt(Types.size()); 2929 2930 for (std::vector<Type*>::const_iterator I=Types.begin(), E=Types.end(); 2931 I!=E;++I) 2932 (*I)->Emit(S); 2933 2934 S.EmitOwnedPtr(TUDecl); 2935 2936 // FIXME: S.EmitOwnedPtr(CFConstantStringTypeDecl); 2937} 2938 2939ASTContext* ASTContext::Create(llvm::Deserializer& D) { 2940 2941 // Read the language options. 2942 LangOptions LOpts; 2943 LOpts.Read(D); 2944 2945 SourceManager &SM = D.ReadRef<SourceManager>(); 2946 TargetInfo &t = D.ReadRef<TargetInfo>(); 2947 IdentifierTable &idents = D.ReadRef<IdentifierTable>(); 2948 SelectorTable &sels = D.ReadRef<SelectorTable>(); 2949 2950 unsigned size_reserve = D.ReadInt(); 2951 2952 ASTContext* A = new ASTContext(LOpts, SM, t, idents, sels, 2953 size_reserve); 2954 2955 for (unsigned i = 0; i < size_reserve; ++i) 2956 Type::Create(*A,i,D); 2957 2958 A->TUDecl = cast<TranslationUnitDecl>(D.ReadOwnedPtr<Decl>(*A)); 2959 2960 // FIXME: A->CFConstantStringTypeDecl = D.ReadOwnedPtr<RecordDecl>(); 2961 2962 return A; 2963} 2964