ASTContext.cpp revision 7d10b7eb670b821741b4c96f6cf7afbc3bb39abe
1//===--- ASTContext.cpp - Context to hold long-lived AST nodes ------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements the ASTContext interface. 11// 12//===----------------------------------------------------------------------===// 13 14#include "clang/AST/ASTContext.h" 15#include "clang/AST/CharUnits.h" 16#include "clang/AST/DeclCXX.h" 17#include "clang/AST/DeclObjC.h" 18#include "clang/AST/DeclTemplate.h" 19#include "clang/AST/TypeLoc.h" 20#include "clang/AST/Expr.h" 21#include "clang/AST/ExternalASTSource.h" 22#include "clang/AST/RecordLayout.h" 23#include "clang/Basic/Builtins.h" 24#include "clang/Basic/SourceManager.h" 25#include "clang/Basic/TargetInfo.h" 26#include "llvm/ADT/SmallString.h" 27#include "llvm/ADT/StringExtras.h" 28#include "llvm/Support/MathExtras.h" 29#include "llvm/Support/raw_ostream.h" 30#include "RecordLayoutBuilder.h" 31 32using namespace clang; 33 34enum FloatingRank { 35 FloatRank, DoubleRank, LongDoubleRank 36}; 37 38ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 39 const TargetInfo &t, 40 IdentifierTable &idents, SelectorTable &sels, 41 Builtin::Context &builtins, 42 bool FreeMem, unsigned size_reserve) : 43 GlobalNestedNameSpecifier(0), CFConstantStringTypeDecl(0), 44 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 45 sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 46 SourceMgr(SM), LangOpts(LOpts), 47 LoadedExternalComments(false), FreeMemory(FreeMem), Target(t), 48 Idents(idents), Selectors(sels), 49 BuiltinInfo(builtins), ExternalSource(0), PrintingPolicy(LOpts) { 50 ObjCIdRedefinitionType = QualType(); 51 ObjCClassRedefinitionType = QualType(); 52 ObjCSelRedefinitionType = QualType(); 53 if (size_reserve > 0) Types.reserve(size_reserve); 54 TUDecl = TranslationUnitDecl::Create(*this); 55 InitBuiltinTypes(); 56} 57 58ASTContext::~ASTContext() { 59 // Release the DenseMaps associated with DeclContext objects. 60 // FIXME: Is this the ideal solution? 61 ReleaseDeclContextMaps(); 62 63 // Release all of the memory associated with overridden C++ methods. 64 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 65 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 66 OM != OMEnd; ++OM) 67 OM->second.Destroy(); 68 69 if (FreeMemory) { 70 // Deallocate all the types. 71 while (!Types.empty()) { 72 Types.back()->Destroy(*this); 73 Types.pop_back(); 74 } 75 76 for (llvm::FoldingSet<ExtQuals>::iterator 77 I = ExtQualNodes.begin(), E = ExtQualNodes.end(); I != E; ) { 78 // Increment in loop to prevent using deallocated memory. 79 Deallocate(&*I++); 80 } 81 } 82 83 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 84 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 85 // Increment in loop to prevent using deallocated memory. 86 ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second); 87 delete R; 88 } 89 90 for (llvm::DenseMap<const ObjCContainerDecl*, 91 const ASTRecordLayout*>::iterator 92 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) { 93 // Increment in loop to prevent using deallocated memory. 94 ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second); 95 delete R; 96 } 97 98 // Destroy nested-name-specifiers. 99 for (llvm::FoldingSet<NestedNameSpecifier>::iterator 100 NNS = NestedNameSpecifiers.begin(), 101 NNSEnd = NestedNameSpecifiers.end(); 102 NNS != NNSEnd; ) { 103 // Increment in loop to prevent using deallocated memory. 104 (*NNS++).Destroy(*this); 105 } 106 107 if (GlobalNestedNameSpecifier) 108 GlobalNestedNameSpecifier->Destroy(*this); 109 110 TUDecl->Destroy(*this); 111} 112 113void 114ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 115 ExternalSource.reset(Source.take()); 116} 117 118void ASTContext::PrintStats() const { 119 fprintf(stderr, "*** AST Context Stats:\n"); 120 fprintf(stderr, " %d types total.\n", (int)Types.size()); 121 122 unsigned counts[] = { 123#define TYPE(Name, Parent) 0, 124#define ABSTRACT_TYPE(Name, Parent) 125#include "clang/AST/TypeNodes.def" 126 0 // Extra 127 }; 128 129 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 130 Type *T = Types[i]; 131 counts[(unsigned)T->getTypeClass()]++; 132 } 133 134 unsigned Idx = 0; 135 unsigned TotalBytes = 0; 136#define TYPE(Name, Parent) \ 137 if (counts[Idx]) \ 138 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 139 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 140 ++Idx; 141#define ABSTRACT_TYPE(Name, Parent) 142#include "clang/AST/TypeNodes.def" 143 144 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 145 146 if (ExternalSource.get()) { 147 fprintf(stderr, "\n"); 148 ExternalSource->PrintStats(); 149 } 150} 151 152 153void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 154 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 155 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 156 Types.push_back(Ty); 157} 158 159void ASTContext::InitBuiltinTypes() { 160 assert(VoidTy.isNull() && "Context reinitialized?"); 161 162 // C99 6.2.5p19. 163 InitBuiltinType(VoidTy, BuiltinType::Void); 164 165 // C99 6.2.5p2. 166 InitBuiltinType(BoolTy, BuiltinType::Bool); 167 // C99 6.2.5p3. 168 if (LangOpts.CharIsSigned) 169 InitBuiltinType(CharTy, BuiltinType::Char_S); 170 else 171 InitBuiltinType(CharTy, BuiltinType::Char_U); 172 // C99 6.2.5p4. 173 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 174 InitBuiltinType(ShortTy, BuiltinType::Short); 175 InitBuiltinType(IntTy, BuiltinType::Int); 176 InitBuiltinType(LongTy, BuiltinType::Long); 177 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 178 179 // C99 6.2.5p6. 180 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 181 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 182 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 183 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 184 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 185 186 // C99 6.2.5p10. 187 InitBuiltinType(FloatTy, BuiltinType::Float); 188 InitBuiltinType(DoubleTy, BuiltinType::Double); 189 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 190 191 // GNU extension, 128-bit integers. 192 InitBuiltinType(Int128Ty, BuiltinType::Int128); 193 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 194 195 if (LangOpts.CPlusPlus) // C++ 3.9.1p5 196 InitBuiltinType(WCharTy, BuiltinType::WChar); 197 else // C99 198 WCharTy = getFromTargetType(Target.getWCharType()); 199 200 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 201 InitBuiltinType(Char16Ty, BuiltinType::Char16); 202 else // C99 203 Char16Ty = getFromTargetType(Target.getChar16Type()); 204 205 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 206 InitBuiltinType(Char32Ty, BuiltinType::Char32); 207 else // C99 208 Char32Ty = getFromTargetType(Target.getChar32Type()); 209 210 // Placeholder type for functions. 211 InitBuiltinType(OverloadTy, BuiltinType::Overload); 212 213 // Placeholder type for type-dependent expressions whose type is 214 // completely unknown. No code should ever check a type against 215 // DependentTy and users should never see it; however, it is here to 216 // help diagnose failures to properly check for type-dependent 217 // expressions. 218 InitBuiltinType(DependentTy, BuiltinType::Dependent); 219 220 // Placeholder type for C++0x auto declarations whose real type has 221 // not yet been deduced. 222 InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 223 224 // C99 6.2.5p11. 225 FloatComplexTy = getComplexType(FloatTy); 226 DoubleComplexTy = getComplexType(DoubleTy); 227 LongDoubleComplexTy = getComplexType(LongDoubleTy); 228 229 BuiltinVaListType = QualType(); 230 231 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 232 ObjCIdTypedefType = QualType(); 233 ObjCClassTypedefType = QualType(); 234 ObjCSelTypedefType = QualType(); 235 236 // Builtin types for 'id', 'Class', and 'SEL'. 237 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 238 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 239 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 240 241 ObjCConstantStringType = QualType(); 242 243 // void * type 244 VoidPtrTy = getPointerType(VoidTy); 245 246 // nullptr type (C++0x 2.14.7) 247 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 248} 249 250MemberSpecializationInfo * 251ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 252 assert(Var->isStaticDataMember() && "Not a static data member"); 253 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 254 = InstantiatedFromStaticDataMember.find(Var); 255 if (Pos == InstantiatedFromStaticDataMember.end()) 256 return 0; 257 258 return Pos->second; 259} 260 261void 262ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 263 TemplateSpecializationKind TSK) { 264 assert(Inst->isStaticDataMember() && "Not a static data member"); 265 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 266 assert(!InstantiatedFromStaticDataMember[Inst] && 267 "Already noted what static data member was instantiated from"); 268 InstantiatedFromStaticDataMember[Inst] 269 = new (*this) MemberSpecializationInfo(Tmpl, TSK); 270} 271 272NamedDecl * 273ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 274 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 275 = InstantiatedFromUsingDecl.find(UUD); 276 if (Pos == InstantiatedFromUsingDecl.end()) 277 return 0; 278 279 return Pos->second; 280} 281 282void 283ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 284 assert((isa<UsingDecl>(Pattern) || 285 isa<UnresolvedUsingValueDecl>(Pattern) || 286 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 287 "pattern decl is not a using decl"); 288 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 289 InstantiatedFromUsingDecl[Inst] = Pattern; 290} 291 292UsingShadowDecl * 293ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 294 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 295 = InstantiatedFromUsingShadowDecl.find(Inst); 296 if (Pos == InstantiatedFromUsingShadowDecl.end()) 297 return 0; 298 299 return Pos->second; 300} 301 302void 303ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 304 UsingShadowDecl *Pattern) { 305 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 306 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 307} 308 309FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 310 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 311 = InstantiatedFromUnnamedFieldDecl.find(Field); 312 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 313 return 0; 314 315 return Pos->second; 316} 317 318void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 319 FieldDecl *Tmpl) { 320 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 321 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 322 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 323 "Already noted what unnamed field was instantiated from"); 324 325 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 326} 327 328CXXMethodVector::iterator CXXMethodVector::begin() const { 329 if ((Storage & 0x01) == 0) 330 return reinterpret_cast<iterator>(&Storage); 331 332 vector_type *Vec = reinterpret_cast<vector_type *>(Storage & ~0x01); 333 return &Vec->front(); 334} 335 336CXXMethodVector::iterator CXXMethodVector::end() const { 337 if ((Storage & 0x01) == 0) { 338 if (Storage == 0) 339 return reinterpret_cast<iterator>(&Storage); 340 341 return reinterpret_cast<iterator>(&Storage) + 1; 342 } 343 344 vector_type *Vec = reinterpret_cast<vector_type *>(Storage & ~0x01); 345 return &Vec->front() + Vec->size(); 346} 347 348void CXXMethodVector::push_back(const CXXMethodDecl *Method) { 349 if (Storage == 0) { 350 // 0 -> 1 element. 351 Storage = reinterpret_cast<uintptr_t>(Method); 352 return; 353 } 354 355 vector_type *Vec; 356 if ((Storage & 0x01) == 0) { 357 // 1 -> 2 elements. Allocate a new vector and push the element into that 358 // vector. 359 Vec = new vector_type; 360 Vec->push_back(reinterpret_cast<const CXXMethodDecl *>(Storage)); 361 Storage = reinterpret_cast<uintptr_t>(Vec) | 0x01; 362 } else 363 Vec = reinterpret_cast<vector_type *>(Storage & ~0x01); 364 365 // Add the new method to the vector. 366 Vec->push_back(Method); 367} 368 369void CXXMethodVector::Destroy() { 370 if (Storage & 0x01) 371 delete reinterpret_cast<vector_type *>(Storage & ~0x01); 372 373 Storage = 0; 374} 375 376 377ASTContext::overridden_cxx_method_iterator 378ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 379 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 380 = OverriddenMethods.find(Method); 381 if (Pos == OverriddenMethods.end()) 382 return 0; 383 384 return Pos->second.begin(); 385} 386 387ASTContext::overridden_cxx_method_iterator 388ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 389 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 390 = OverriddenMethods.find(Method); 391 if (Pos == OverriddenMethods.end()) 392 return 0; 393 394 return Pos->second.end(); 395} 396 397void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 398 const CXXMethodDecl *Overridden) { 399 OverriddenMethods[Method].push_back(Overridden); 400} 401 402namespace { 403 class BeforeInTranslationUnit 404 : std::binary_function<SourceRange, SourceRange, bool> { 405 SourceManager *SourceMgr; 406 407 public: 408 explicit BeforeInTranslationUnit(SourceManager *SM) : SourceMgr(SM) { } 409 410 bool operator()(SourceRange X, SourceRange Y) { 411 return SourceMgr->isBeforeInTranslationUnit(X.getBegin(), Y.getBegin()); 412 } 413 }; 414} 415 416/// \brief Determine whether the given comment is a Doxygen-style comment. 417/// 418/// \param Start the start of the comment text. 419/// 420/// \param End the end of the comment text. 421/// 422/// \param Member whether we want to check whether this is a member comment 423/// (which requires a < after the Doxygen-comment delimiter). Otherwise, 424/// we only return true when we find a non-member comment. 425static bool 426isDoxygenComment(SourceManager &SourceMgr, SourceRange Comment, 427 bool Member = false) { 428 const char *BufferStart 429 = SourceMgr.getBufferData(SourceMgr.getFileID(Comment.getBegin())).first; 430 const char *Start = BufferStart + SourceMgr.getFileOffset(Comment.getBegin()); 431 const char* End = BufferStart + SourceMgr.getFileOffset(Comment.getEnd()); 432 433 if (End - Start < 4) 434 return false; 435 436 assert(Start[0] == '/' && "Not a comment?"); 437 if (Start[1] == '*' && !(Start[2] == '!' || Start[2] == '*')) 438 return false; 439 if (Start[1] == '/' && !(Start[2] == '!' || Start[2] == '/')) 440 return false; 441 442 return (Start[3] == '<') == Member; 443} 444 445/// \brief Retrieve the comment associated with the given declaration, if 446/// it has one. 447const char *ASTContext::getCommentForDecl(const Decl *D) { 448 if (!D) 449 return 0; 450 451 // Check whether we have cached a comment string for this declaration 452 // already. 453 llvm::DenseMap<const Decl *, std::string>::iterator Pos 454 = DeclComments.find(D); 455 if (Pos != DeclComments.end()) 456 return Pos->second.c_str(); 457 458 // If we have an external AST source and have not yet loaded comments from 459 // that source, do so now. 460 if (ExternalSource && !LoadedExternalComments) { 461 std::vector<SourceRange> LoadedComments; 462 ExternalSource->ReadComments(LoadedComments); 463 464 if (!LoadedComments.empty()) 465 Comments.insert(Comments.begin(), LoadedComments.begin(), 466 LoadedComments.end()); 467 468 LoadedExternalComments = true; 469 } 470 471 // If there are no comments anywhere, we won't find anything. 472 if (Comments.empty()) 473 return 0; 474 475 // If the declaration doesn't map directly to a location in a file, we 476 // can't find the comment. 477 SourceLocation DeclStartLoc = D->getLocStart(); 478 if (DeclStartLoc.isInvalid() || !DeclStartLoc.isFileID()) 479 return 0; 480 481 // Find the comment that occurs just before this declaration. 482 std::vector<SourceRange>::iterator LastComment 483 = std::lower_bound(Comments.begin(), Comments.end(), 484 SourceRange(DeclStartLoc), 485 BeforeInTranslationUnit(&SourceMgr)); 486 487 // Decompose the location for the start of the declaration and find the 488 // beginning of the file buffer. 489 std::pair<FileID, unsigned> DeclStartDecomp 490 = SourceMgr.getDecomposedLoc(DeclStartLoc); 491 const char *FileBufferStart 492 = SourceMgr.getBufferData(DeclStartDecomp.first).first; 493 494 // First check whether we have a comment for a member. 495 if (LastComment != Comments.end() && 496 !isa<TagDecl>(D) && !isa<NamespaceDecl>(D) && 497 isDoxygenComment(SourceMgr, *LastComment, true)) { 498 std::pair<FileID, unsigned> LastCommentEndDecomp 499 = SourceMgr.getDecomposedLoc(LastComment->getEnd()); 500 if (DeclStartDecomp.first == LastCommentEndDecomp.first && 501 SourceMgr.getLineNumber(DeclStartDecomp.first, DeclStartDecomp.second) 502 == SourceMgr.getLineNumber(LastCommentEndDecomp.first, 503 LastCommentEndDecomp.second)) { 504 // The Doxygen member comment comes after the declaration starts and 505 // is on the same line and in the same file as the declaration. This 506 // is the comment we want. 507 std::string &Result = DeclComments[D]; 508 Result.append(FileBufferStart + 509 SourceMgr.getFileOffset(LastComment->getBegin()), 510 FileBufferStart + LastCommentEndDecomp.second + 1); 511 return Result.c_str(); 512 } 513 } 514 515 if (LastComment == Comments.begin()) 516 return 0; 517 --LastComment; 518 519 // Decompose the end of the comment. 520 std::pair<FileID, unsigned> LastCommentEndDecomp 521 = SourceMgr.getDecomposedLoc(LastComment->getEnd()); 522 523 // If the comment and the declaration aren't in the same file, then they 524 // aren't related. 525 if (DeclStartDecomp.first != LastCommentEndDecomp.first) 526 return 0; 527 528 // Check that we actually have a Doxygen comment. 529 if (!isDoxygenComment(SourceMgr, *LastComment)) 530 return 0; 531 532 // Compute the starting line for the declaration and for the end of the 533 // comment (this is expensive). 534 unsigned DeclStartLine 535 = SourceMgr.getLineNumber(DeclStartDecomp.first, DeclStartDecomp.second); 536 unsigned CommentEndLine 537 = SourceMgr.getLineNumber(LastCommentEndDecomp.first, 538 LastCommentEndDecomp.second); 539 540 // If the comment does not end on the line prior to the declaration, then 541 // the comment is not associated with the declaration at all. 542 if (CommentEndLine + 1 != DeclStartLine) 543 return 0; 544 545 // We have a comment, but there may be more comments on the previous lines. 546 // Keep looking so long as the comments are still Doxygen comments and are 547 // still adjacent. 548 unsigned ExpectedLine 549 = SourceMgr.getSpellingLineNumber(LastComment->getBegin()) - 1; 550 std::vector<SourceRange>::iterator FirstComment = LastComment; 551 while (FirstComment != Comments.begin()) { 552 // Look at the previous comment 553 --FirstComment; 554 std::pair<FileID, unsigned> Decomp 555 = SourceMgr.getDecomposedLoc(FirstComment->getEnd()); 556 557 // If this previous comment is in a different file, we're done. 558 if (Decomp.first != DeclStartDecomp.first) { 559 ++FirstComment; 560 break; 561 } 562 563 // If this comment is not a Doxygen comment, we're done. 564 if (!isDoxygenComment(SourceMgr, *FirstComment)) { 565 ++FirstComment; 566 break; 567 } 568 569 // If the line number is not what we expected, we're done. 570 unsigned Line = SourceMgr.getLineNumber(Decomp.first, Decomp.second); 571 if (Line != ExpectedLine) { 572 ++FirstComment; 573 break; 574 } 575 576 // Set the next expected line number. 577 ExpectedLine 578 = SourceMgr.getSpellingLineNumber(FirstComment->getBegin()) - 1; 579 } 580 581 // The iterator range [FirstComment, LastComment] contains all of the 582 // BCPL comments that, together, are associated with this declaration. 583 // Form a single comment block string for this declaration that concatenates 584 // all of these comments. 585 std::string &Result = DeclComments[D]; 586 while (FirstComment != LastComment) { 587 std::pair<FileID, unsigned> DecompStart 588 = SourceMgr.getDecomposedLoc(FirstComment->getBegin()); 589 std::pair<FileID, unsigned> DecompEnd 590 = SourceMgr.getDecomposedLoc(FirstComment->getEnd()); 591 Result.append(FileBufferStart + DecompStart.second, 592 FileBufferStart + DecompEnd.second + 1); 593 ++FirstComment; 594 } 595 596 // Append the last comment line. 597 Result.append(FileBufferStart + 598 SourceMgr.getFileOffset(LastComment->getBegin()), 599 FileBufferStart + LastCommentEndDecomp.second + 1); 600 return Result.c_str(); 601} 602 603//===----------------------------------------------------------------------===// 604// Type Sizing and Analysis 605//===----------------------------------------------------------------------===// 606 607/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 608/// scalar floating point type. 609const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 610 const BuiltinType *BT = T->getAs<BuiltinType>(); 611 assert(BT && "Not a floating point type!"); 612 switch (BT->getKind()) { 613 default: assert(0 && "Not a floating point type!"); 614 case BuiltinType::Float: return Target.getFloatFormat(); 615 case BuiltinType::Double: return Target.getDoubleFormat(); 616 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 617 } 618} 619 620/// getDeclAlign - Return a conservative estimate of the alignment of the 621/// specified decl. Note that bitfields do not have a valid alignment, so 622/// this method will assert on them. 623/// If @p RefAsPointee, references are treated like their underlying type 624/// (for alignof), else they're treated like pointers (for CodeGen). 625CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) { 626 unsigned Align = Target.getCharWidth(); 627 628 if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 629 Align = std::max(Align, AA->getMaxAlignment()); 630 631 if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 632 QualType T = VD->getType(); 633 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 634 if (RefAsPointee) 635 T = RT->getPointeeType(); 636 else 637 T = getPointerType(RT->getPointeeType()); 638 } 639 if (!T->isIncompleteType() && !T->isFunctionType()) { 640 // Incomplete or function types default to 1. 641 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 642 T = cast<ArrayType>(T)->getElementType(); 643 644 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 645 } 646 if (const FieldDecl *FD = dyn_cast<FieldDecl>(VD)) { 647 // In the case of a field in a packed struct, we want the minimum 648 // of the alignment of the field and the alignment of the struct. 649 Align = std::min(Align, 650 getPreferredTypeAlign(FD->getParent()->getTypeForDecl())); 651 } 652 } 653 654 return CharUnits::fromQuantity(Align / Target.getCharWidth()); 655} 656 657/// getTypeSize - Return the size of the specified type, in bits. This method 658/// does not work on incomplete types. 659/// 660/// FIXME: Pointers into different addr spaces could have different sizes and 661/// alignment requirements: getPointerInfo should take an AddrSpace, this 662/// should take a QualType, &c. 663std::pair<uint64_t, unsigned> 664ASTContext::getTypeInfo(const Type *T) { 665 uint64_t Width=0; 666 unsigned Align=8; 667 switch (T->getTypeClass()) { 668#define TYPE(Class, Base) 669#define ABSTRACT_TYPE(Class, Base) 670#define NON_CANONICAL_TYPE(Class, Base) 671#define DEPENDENT_TYPE(Class, Base) case Type::Class: 672#include "clang/AST/TypeNodes.def" 673 assert(false && "Should not see dependent types"); 674 break; 675 676 case Type::FunctionNoProto: 677 case Type::FunctionProto: 678 // GCC extension: alignof(function) = 32 bits 679 Width = 0; 680 Align = 32; 681 break; 682 683 case Type::IncompleteArray: 684 case Type::VariableArray: 685 Width = 0; 686 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 687 break; 688 689 case Type::ConstantArray: { 690 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 691 692 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 693 Width = EltInfo.first*CAT->getSize().getZExtValue(); 694 Align = EltInfo.second; 695 break; 696 } 697 case Type::ExtVector: 698 case Type::Vector: { 699 const VectorType *VT = cast<VectorType>(T); 700 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 701 Width = EltInfo.first*VT->getNumElements(); 702 Align = Width; 703 // If the alignment is not a power of 2, round up to the next power of 2. 704 // This happens for non-power-of-2 length vectors. 705 if (VT->getNumElements() & (VT->getNumElements()-1)) { 706 Align = llvm::NextPowerOf2(Align); 707 Width = llvm::RoundUpToAlignment(Width, Align); 708 } 709 break; 710 } 711 712 case Type::Builtin: 713 switch (cast<BuiltinType>(T)->getKind()) { 714 default: assert(0 && "Unknown builtin type!"); 715 case BuiltinType::Void: 716 // GCC extension: alignof(void) = 8 bits. 717 Width = 0; 718 Align = 8; 719 break; 720 721 case BuiltinType::Bool: 722 Width = Target.getBoolWidth(); 723 Align = Target.getBoolAlign(); 724 break; 725 case BuiltinType::Char_S: 726 case BuiltinType::Char_U: 727 case BuiltinType::UChar: 728 case BuiltinType::SChar: 729 Width = Target.getCharWidth(); 730 Align = Target.getCharAlign(); 731 break; 732 case BuiltinType::WChar: 733 Width = Target.getWCharWidth(); 734 Align = Target.getWCharAlign(); 735 break; 736 case BuiltinType::Char16: 737 Width = Target.getChar16Width(); 738 Align = Target.getChar16Align(); 739 break; 740 case BuiltinType::Char32: 741 Width = Target.getChar32Width(); 742 Align = Target.getChar32Align(); 743 break; 744 case BuiltinType::UShort: 745 case BuiltinType::Short: 746 Width = Target.getShortWidth(); 747 Align = Target.getShortAlign(); 748 break; 749 case BuiltinType::UInt: 750 case BuiltinType::Int: 751 Width = Target.getIntWidth(); 752 Align = Target.getIntAlign(); 753 break; 754 case BuiltinType::ULong: 755 case BuiltinType::Long: 756 Width = Target.getLongWidth(); 757 Align = Target.getLongAlign(); 758 break; 759 case BuiltinType::ULongLong: 760 case BuiltinType::LongLong: 761 Width = Target.getLongLongWidth(); 762 Align = Target.getLongLongAlign(); 763 break; 764 case BuiltinType::Int128: 765 case BuiltinType::UInt128: 766 Width = 128; 767 Align = 128; // int128_t is 128-bit aligned on all targets. 768 break; 769 case BuiltinType::Float: 770 Width = Target.getFloatWidth(); 771 Align = Target.getFloatAlign(); 772 break; 773 case BuiltinType::Double: 774 Width = Target.getDoubleWidth(); 775 Align = Target.getDoubleAlign(); 776 break; 777 case BuiltinType::LongDouble: 778 Width = Target.getLongDoubleWidth(); 779 Align = Target.getLongDoubleAlign(); 780 break; 781 case BuiltinType::NullPtr: 782 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 783 Align = Target.getPointerAlign(0); // == sizeof(void*) 784 break; 785 } 786 break; 787 case Type::ObjCObjectPointer: 788 Width = Target.getPointerWidth(0); 789 Align = Target.getPointerAlign(0); 790 break; 791 case Type::BlockPointer: { 792 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 793 Width = Target.getPointerWidth(AS); 794 Align = Target.getPointerAlign(AS); 795 break; 796 } 797 case Type::LValueReference: 798 case Type::RValueReference: { 799 // alignof and sizeof should never enter this code path here, so we go 800 // the pointer route. 801 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 802 Width = Target.getPointerWidth(AS); 803 Align = Target.getPointerAlign(AS); 804 break; 805 } 806 case Type::Pointer: { 807 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 808 Width = Target.getPointerWidth(AS); 809 Align = Target.getPointerAlign(AS); 810 break; 811 } 812 case Type::MemberPointer: { 813 QualType Pointee = cast<MemberPointerType>(T)->getPointeeType(); 814 std::pair<uint64_t, unsigned> PtrDiffInfo = 815 getTypeInfo(getPointerDiffType()); 816 Width = PtrDiffInfo.first; 817 if (Pointee->isFunctionType()) 818 Width *= 2; 819 Align = PtrDiffInfo.second; 820 break; 821 } 822 case Type::Complex: { 823 // Complex types have the same alignment as their elements, but twice the 824 // size. 825 std::pair<uint64_t, unsigned> EltInfo = 826 getTypeInfo(cast<ComplexType>(T)->getElementType()); 827 Width = EltInfo.first*2; 828 Align = EltInfo.second; 829 break; 830 } 831 case Type::ObjCInterface: { 832 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 833 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 834 Width = Layout.getSize(); 835 Align = Layout.getAlignment(); 836 break; 837 } 838 case Type::Record: 839 case Type::Enum: { 840 const TagType *TT = cast<TagType>(T); 841 842 if (TT->getDecl()->isInvalidDecl()) { 843 Width = 1; 844 Align = 1; 845 break; 846 } 847 848 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 849 return getTypeInfo(ET->getDecl()->getIntegerType()); 850 851 const RecordType *RT = cast<RecordType>(TT); 852 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 853 Width = Layout.getSize(); 854 Align = Layout.getAlignment(); 855 break; 856 } 857 858 case Type::SubstTemplateTypeParm: 859 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 860 getReplacementType().getTypePtr()); 861 862 case Type::Elaborated: 863 return getTypeInfo(cast<ElaboratedType>(T)->getUnderlyingType() 864 .getTypePtr()); 865 866 case Type::Typedef: { 867 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 868 if (const AlignedAttr *Aligned = Typedef->getAttr<AlignedAttr>()) { 869 Align = std::max(Aligned->getMaxAlignment(), 870 getTypeAlign(Typedef->getUnderlyingType().getTypePtr())); 871 Width = getTypeSize(Typedef->getUnderlyingType().getTypePtr()); 872 } else 873 return getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 874 break; 875 } 876 877 case Type::TypeOfExpr: 878 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 879 .getTypePtr()); 880 881 case Type::TypeOf: 882 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 883 884 case Type::Decltype: 885 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 886 .getTypePtr()); 887 888 case Type::QualifiedName: 889 return getTypeInfo(cast<QualifiedNameType>(T)->getNamedType().getTypePtr()); 890 891 case Type::TemplateSpecialization: 892 assert(getCanonicalType(T) != T && 893 "Cannot request the size of a dependent type"); 894 // FIXME: this is likely to be wrong once we support template 895 // aliases, since a template alias could refer to a typedef that 896 // has an __aligned__ attribute on it. 897 return getTypeInfo(getCanonicalType(T)); 898 } 899 900 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 901 return std::make_pair(Width, Align); 902} 903 904/// getTypeSizeInChars - Return the size of the specified type, in characters. 905/// This method does not work on incomplete types. 906CharUnits ASTContext::getTypeSizeInChars(QualType T) { 907 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 908} 909CharUnits ASTContext::getTypeSizeInChars(const Type *T) { 910 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 911} 912 913/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 914/// characters. This method does not work on incomplete types. 915CharUnits ASTContext::getTypeAlignInChars(QualType T) { 916 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 917} 918CharUnits ASTContext::getTypeAlignInChars(const Type *T) { 919 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 920} 921 922/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 923/// type for the current target in bits. This can be different than the ABI 924/// alignment in cases where it is beneficial for performance to overalign 925/// a data type. 926unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 927 unsigned ABIAlign = getTypeAlign(T); 928 929 // Double and long long should be naturally aligned if possible. 930 if (const ComplexType* CT = T->getAs<ComplexType>()) 931 T = CT->getElementType().getTypePtr(); 932 if (T->isSpecificBuiltinType(BuiltinType::Double) || 933 T->isSpecificBuiltinType(BuiltinType::LongLong)) 934 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 935 936 return ABIAlign; 937} 938 939static void CollectLocalObjCIvars(ASTContext *Ctx, 940 const ObjCInterfaceDecl *OI, 941 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 942 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 943 E = OI->ivar_end(); I != E; ++I) { 944 ObjCIvarDecl *IVDecl = *I; 945 if (!IVDecl->isInvalidDecl()) 946 Fields.push_back(cast<FieldDecl>(IVDecl)); 947 } 948} 949 950void ASTContext::CollectObjCIvars(const ObjCInterfaceDecl *OI, 951 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 952 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 953 CollectObjCIvars(SuperClass, Fields); 954 CollectLocalObjCIvars(this, OI, Fields); 955} 956 957/// ShallowCollectObjCIvars - 958/// Collect all ivars, including those synthesized, in the current class. 959/// 960void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 961 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 962 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 963 E = OI->ivar_end(); I != E; ++I) { 964 Ivars.push_back(*I); 965 } 966 967 CollectNonClassIvars(OI, Ivars); 968} 969 970void ASTContext::CollectProtocolSynthesizedIvars(const ObjCProtocolDecl *PD, 971 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 972 for (ObjCContainerDecl::prop_iterator I = PD->prop_begin(), 973 E = PD->prop_end(); I != E; ++I) 974 if (ObjCIvarDecl *Ivar = (*I)->getPropertyIvarDecl()) 975 Ivars.push_back(Ivar); 976 977 // Also look into nested protocols. 978 for (ObjCProtocolDecl::protocol_iterator P = PD->protocol_begin(), 979 E = PD->protocol_end(); P != E; ++P) 980 CollectProtocolSynthesizedIvars(*P, Ivars); 981} 982 983/// CollectNonClassIvars - 984/// This routine collects all other ivars which are not declared in the class. 985/// This includes synthesized ivars and those in class's implementation. 986/// 987void ASTContext::CollectNonClassIvars(const ObjCInterfaceDecl *OI, 988 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 989 // Find ivars declared in class extension. 990 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) { 991 for (ObjCCategoryDecl::ivar_iterator I = CDecl->ivar_begin(), 992 E = CDecl->ivar_end(); I != E; ++I) { 993 Ivars.push_back(*I); 994 } 995 } 996 997 for (ObjCInterfaceDecl::prop_iterator I = OI->prop_begin(), 998 E = OI->prop_end(); I != E; ++I) { 999 if (ObjCIvarDecl *Ivar = (*I)->getPropertyIvarDecl()) 1000 Ivars.push_back(Ivar); 1001 } 1002 // Also look into interface's protocol list for properties declared 1003 // in the protocol and whose ivars are synthesized. 1004 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 1005 PE = OI->protocol_end(); P != PE; ++P) { 1006 ObjCProtocolDecl *PD = (*P); 1007 CollectProtocolSynthesizedIvars(PD, Ivars); 1008 } 1009 1010 // Also add any ivar defined in this class's implementation 1011 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) { 1012 for (ObjCImplementationDecl::ivar_iterator I = ImplDecl->ivar_begin(), 1013 E = ImplDecl->ivar_end(); I != E; ++I) 1014 Ivars.push_back(*I); 1015 } 1016} 1017 1018/// CollectInheritedProtocols - Collect all protocols in current class and 1019/// those inherited by it. 1020void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 1021 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 1022 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 1023 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 1024 PE = OI->protocol_end(); P != PE; ++P) { 1025 ObjCProtocolDecl *Proto = (*P); 1026 Protocols.insert(Proto); 1027 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1028 PE = Proto->protocol_end(); P != PE; ++P) { 1029 Protocols.insert(*P); 1030 CollectInheritedProtocols(*P, Protocols); 1031 } 1032 } 1033 1034 // Categories of this Interface. 1035 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 1036 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 1037 CollectInheritedProtocols(CDeclChain, Protocols); 1038 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 1039 while (SD) { 1040 CollectInheritedProtocols(SD, Protocols); 1041 SD = SD->getSuperClass(); 1042 } 1043 return; 1044 } 1045 if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 1046 for (ObjCInterfaceDecl::protocol_iterator P = OC->protocol_begin(), 1047 PE = OC->protocol_end(); P != PE; ++P) { 1048 ObjCProtocolDecl *Proto = (*P); 1049 Protocols.insert(Proto); 1050 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1051 PE = Proto->protocol_end(); P != PE; ++P) 1052 CollectInheritedProtocols(*P, Protocols); 1053 } 1054 return; 1055 } 1056 if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 1057 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 1058 PE = OP->protocol_end(); P != PE; ++P) { 1059 ObjCProtocolDecl *Proto = (*P); 1060 Protocols.insert(Proto); 1061 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1062 PE = Proto->protocol_end(); P != PE; ++P) 1063 CollectInheritedProtocols(*P, Protocols); 1064 } 1065 return; 1066 } 1067} 1068 1069unsigned ASTContext::CountProtocolSynthesizedIvars(const ObjCProtocolDecl *PD) { 1070 unsigned count = 0; 1071 for (ObjCContainerDecl::prop_iterator I = PD->prop_begin(), 1072 E = PD->prop_end(); I != E; ++I) 1073 if ((*I)->getPropertyIvarDecl()) 1074 ++count; 1075 1076 // Also look into nested protocols. 1077 for (ObjCProtocolDecl::protocol_iterator P = PD->protocol_begin(), 1078 E = PD->protocol_end(); P != E; ++P) 1079 count += CountProtocolSynthesizedIvars(*P); 1080 return count; 1081} 1082 1083unsigned ASTContext::CountSynthesizedIvars(const ObjCInterfaceDecl *OI) { 1084 unsigned count = 0; 1085 for (ObjCInterfaceDecl::prop_iterator I = OI->prop_begin(), 1086 E = OI->prop_end(); I != E; ++I) { 1087 if ((*I)->getPropertyIvarDecl()) 1088 ++count; 1089 } 1090 // Also look into interface's protocol list for properties declared 1091 // in the protocol and whose ivars are synthesized. 1092 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 1093 PE = OI->protocol_end(); P != PE; ++P) { 1094 ObjCProtocolDecl *PD = (*P); 1095 count += CountProtocolSynthesizedIvars(PD); 1096 } 1097 return count; 1098} 1099 1100/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1101ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 1102 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1103 I = ObjCImpls.find(D); 1104 if (I != ObjCImpls.end()) 1105 return cast<ObjCImplementationDecl>(I->second); 1106 return 0; 1107} 1108/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1109ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 1110 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1111 I = ObjCImpls.find(D); 1112 if (I != ObjCImpls.end()) 1113 return cast<ObjCCategoryImplDecl>(I->second); 1114 return 0; 1115} 1116 1117/// \brief Set the implementation of ObjCInterfaceDecl. 1118void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1119 ObjCImplementationDecl *ImplD) { 1120 assert(IFaceD && ImplD && "Passed null params"); 1121 ObjCImpls[IFaceD] = ImplD; 1122} 1123/// \brief Set the implementation of ObjCCategoryDecl. 1124void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 1125 ObjCCategoryImplDecl *ImplD) { 1126 assert(CatD && ImplD && "Passed null params"); 1127 ObjCImpls[CatD] = ImplD; 1128} 1129 1130/// \brief Allocate an uninitialized TypeSourceInfo. 1131/// 1132/// The caller should initialize the memory held by TypeSourceInfo using 1133/// the TypeLoc wrappers. 1134/// 1135/// \param T the type that will be the basis for type source info. This type 1136/// should refer to how the declarator was written in source code, not to 1137/// what type semantic analysis resolved the declarator to. 1138TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 1139 unsigned DataSize) { 1140 if (!DataSize) 1141 DataSize = TypeLoc::getFullDataSizeForType(T); 1142 else 1143 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 1144 "incorrect data size provided to CreateTypeSourceInfo!"); 1145 1146 TypeSourceInfo *TInfo = 1147 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 1148 new (TInfo) TypeSourceInfo(T); 1149 return TInfo; 1150} 1151 1152TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1153 SourceLocation L) { 1154 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1155 DI->getTypeLoc().initialize(L); 1156 return DI; 1157} 1158 1159/// getInterfaceLayoutImpl - Get or compute information about the 1160/// layout of the given interface. 1161/// 1162/// \param Impl - If given, also include the layout of the interface's 1163/// implementation. This may differ by including synthesized ivars. 1164const ASTRecordLayout & 1165ASTContext::getObjCLayout(const ObjCInterfaceDecl *D, 1166 const ObjCImplementationDecl *Impl) { 1167 assert(!D->isForwardDecl() && "Invalid interface decl!"); 1168 1169 // Look up this layout, if already laid out, return what we have. 1170 ObjCContainerDecl *Key = 1171 Impl ? (ObjCContainerDecl*) Impl : (ObjCContainerDecl*) D; 1172 if (const ASTRecordLayout *Entry = ObjCLayouts[Key]) 1173 return *Entry; 1174 1175 // Add in synthesized ivar count if laying out an implementation. 1176 if (Impl) { 1177 unsigned SynthCount = CountSynthesizedIvars(D); 1178 // If there aren't any sythesized ivars then reuse the interface 1179 // entry. Note we can't cache this because we simply free all 1180 // entries later; however we shouldn't look up implementations 1181 // frequently. 1182 if (SynthCount == 0) 1183 return getObjCLayout(D, 0); 1184 } 1185 1186 const ASTRecordLayout *NewEntry = 1187 ASTRecordLayoutBuilder::ComputeLayout(*this, D, Impl); 1188 ObjCLayouts[Key] = NewEntry; 1189 1190 return *NewEntry; 1191} 1192 1193const ASTRecordLayout & 1194ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 1195 return getObjCLayout(D, 0); 1196} 1197 1198const ASTRecordLayout & 1199ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 1200 return getObjCLayout(D->getClassInterface(), D); 1201} 1202 1203/// getASTRecordLayout - Get or compute information about the layout of the 1204/// specified record (struct/union/class), which indicates its size and field 1205/// position information. 1206const ASTRecordLayout &ASTContext::getASTRecordLayout(const RecordDecl *D) { 1207 D = D->getDefinition(); 1208 assert(D && "Cannot get layout of forward declarations!"); 1209 1210 // Look up this layout, if already laid out, return what we have. 1211 // Note that we can't save a reference to the entry because this function 1212 // is recursive. 1213 const ASTRecordLayout *Entry = ASTRecordLayouts[D]; 1214 if (Entry) return *Entry; 1215 1216 const ASTRecordLayout *NewEntry = 1217 ASTRecordLayoutBuilder::ComputeLayout(*this, D); 1218 ASTRecordLayouts[D] = NewEntry; 1219 1220 return *NewEntry; 1221} 1222 1223const CXXMethodDecl *ASTContext::getKeyFunction(const CXXRecordDecl *RD) { 1224 RD = cast<CXXRecordDecl>(RD->getDefinition()); 1225 assert(RD && "Cannot get key function for forward declarations!"); 1226 1227 const CXXMethodDecl *&Entry = KeyFunctions[RD]; 1228 if (!Entry) 1229 Entry = ASTRecordLayoutBuilder::ComputeKeyFunction(RD); 1230 else 1231 assert(Entry == ASTRecordLayoutBuilder::ComputeKeyFunction(RD) && 1232 "Key function changed!"); 1233 1234 return Entry; 1235} 1236 1237//===----------------------------------------------------------------------===// 1238// Type creation/memoization methods 1239//===----------------------------------------------------------------------===// 1240 1241QualType ASTContext::getExtQualType(const Type *TypeNode, Qualifiers Quals) { 1242 unsigned Fast = Quals.getFastQualifiers(); 1243 Quals.removeFastQualifiers(); 1244 1245 // Check if we've already instantiated this type. 1246 llvm::FoldingSetNodeID ID; 1247 ExtQuals::Profile(ID, TypeNode, Quals); 1248 void *InsertPos = 0; 1249 if (ExtQuals *EQ = ExtQualNodes.FindNodeOrInsertPos(ID, InsertPos)) { 1250 assert(EQ->getQualifiers() == Quals); 1251 QualType T = QualType(EQ, Fast); 1252 return T; 1253 } 1254 1255 ExtQuals *New = new (*this, TypeAlignment) ExtQuals(*this, TypeNode, Quals); 1256 ExtQualNodes.InsertNode(New, InsertPos); 1257 QualType T = QualType(New, Fast); 1258 return T; 1259} 1260 1261QualType ASTContext::getVolatileType(QualType T) { 1262 QualType CanT = getCanonicalType(T); 1263 if (CanT.isVolatileQualified()) return T; 1264 1265 QualifierCollector Quals; 1266 const Type *TypeNode = Quals.strip(T); 1267 Quals.addVolatile(); 1268 1269 return getExtQualType(TypeNode, Quals); 1270} 1271 1272QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 1273 QualType CanT = getCanonicalType(T); 1274 if (CanT.getAddressSpace() == AddressSpace) 1275 return T; 1276 1277 // If we are composing extended qualifiers together, merge together 1278 // into one ExtQuals node. 1279 QualifierCollector Quals; 1280 const Type *TypeNode = Quals.strip(T); 1281 1282 // If this type already has an address space specified, it cannot get 1283 // another one. 1284 assert(!Quals.hasAddressSpace() && 1285 "Type cannot be in multiple addr spaces!"); 1286 Quals.addAddressSpace(AddressSpace); 1287 1288 return getExtQualType(TypeNode, Quals); 1289} 1290 1291QualType ASTContext::getObjCGCQualType(QualType T, 1292 Qualifiers::GC GCAttr) { 1293 QualType CanT = getCanonicalType(T); 1294 if (CanT.getObjCGCAttr() == GCAttr) 1295 return T; 1296 1297 if (T->isPointerType()) { 1298 QualType Pointee = T->getAs<PointerType>()->getPointeeType(); 1299 if (Pointee->isAnyPointerType()) { 1300 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1301 return getPointerType(ResultType); 1302 } 1303 } 1304 1305 // If we are composing extended qualifiers together, merge together 1306 // into one ExtQuals node. 1307 QualifierCollector Quals; 1308 const Type *TypeNode = Quals.strip(T); 1309 1310 // If this type already has an ObjCGC specified, it cannot get 1311 // another one. 1312 assert(!Quals.hasObjCGCAttr() && 1313 "Type cannot have multiple ObjCGCs!"); 1314 Quals.addObjCGCAttr(GCAttr); 1315 1316 return getExtQualType(TypeNode, Quals); 1317} 1318 1319static QualType getNoReturnCallConvType(ASTContext& Context, QualType T, 1320 bool AddNoReturn, 1321 CallingConv CallConv) { 1322 QualType ResultType; 1323 if (const PointerType *Pointer = T->getAs<PointerType>()) { 1324 QualType Pointee = Pointer->getPointeeType(); 1325 ResultType = getNoReturnCallConvType(Context, Pointee, AddNoReturn, 1326 CallConv); 1327 if (ResultType == Pointee) 1328 return T; 1329 1330 ResultType = Context.getPointerType(ResultType); 1331 } else if (const BlockPointerType *BlockPointer 1332 = T->getAs<BlockPointerType>()) { 1333 QualType Pointee = BlockPointer->getPointeeType(); 1334 ResultType = getNoReturnCallConvType(Context, Pointee, AddNoReturn, 1335 CallConv); 1336 if (ResultType == Pointee) 1337 return T; 1338 1339 ResultType = Context.getBlockPointerType(ResultType); 1340 } else if (const FunctionType *F = T->getAs<FunctionType>()) { 1341 if (F->getNoReturnAttr() == AddNoReturn && F->getCallConv() == CallConv) 1342 return T; 1343 1344 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(F)) { 1345 ResultType = Context.getFunctionNoProtoType(FNPT->getResultType(), 1346 AddNoReturn, CallConv); 1347 } else { 1348 const FunctionProtoType *FPT = cast<FunctionProtoType>(F); 1349 ResultType 1350 = Context.getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1351 FPT->getNumArgs(), FPT->isVariadic(), 1352 FPT->getTypeQuals(), 1353 FPT->hasExceptionSpec(), 1354 FPT->hasAnyExceptionSpec(), 1355 FPT->getNumExceptions(), 1356 FPT->exception_begin(), 1357 AddNoReturn, CallConv); 1358 } 1359 } else 1360 return T; 1361 1362 return Context.getQualifiedType(ResultType, T.getLocalQualifiers()); 1363} 1364 1365QualType ASTContext::getNoReturnType(QualType T, bool AddNoReturn) { 1366 return getNoReturnCallConvType(*this, T, AddNoReturn, T.getCallConv()); 1367} 1368 1369QualType ASTContext::getCallConvType(QualType T, CallingConv CallConv) { 1370 return getNoReturnCallConvType(*this, T, T.getNoReturnAttr(), CallConv); 1371} 1372 1373/// getComplexType - Return the uniqued reference to the type for a complex 1374/// number with the specified element type. 1375QualType ASTContext::getComplexType(QualType T) { 1376 // Unique pointers, to guarantee there is only one pointer of a particular 1377 // structure. 1378 llvm::FoldingSetNodeID ID; 1379 ComplexType::Profile(ID, T); 1380 1381 void *InsertPos = 0; 1382 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1383 return QualType(CT, 0); 1384 1385 // If the pointee type isn't canonical, this won't be a canonical type either, 1386 // so fill in the canonical type field. 1387 QualType Canonical; 1388 if (!T.isCanonical()) { 1389 Canonical = getComplexType(getCanonicalType(T)); 1390 1391 // Get the new insert position for the node we care about. 1392 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1393 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1394 } 1395 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1396 Types.push_back(New); 1397 ComplexTypes.InsertNode(New, InsertPos); 1398 return QualType(New, 0); 1399} 1400 1401/// getPointerType - Return the uniqued reference to the type for a pointer to 1402/// the specified type. 1403QualType ASTContext::getPointerType(QualType T) { 1404 // Unique pointers, to guarantee there is only one pointer of a particular 1405 // structure. 1406 llvm::FoldingSetNodeID ID; 1407 PointerType::Profile(ID, T); 1408 1409 void *InsertPos = 0; 1410 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1411 return QualType(PT, 0); 1412 1413 // If the pointee type isn't canonical, this won't be a canonical type either, 1414 // so fill in the canonical type field. 1415 QualType Canonical; 1416 if (!T.isCanonical()) { 1417 Canonical = getPointerType(getCanonicalType(T)); 1418 1419 // Get the new insert position for the node we care about. 1420 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1421 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1422 } 1423 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1424 Types.push_back(New); 1425 PointerTypes.InsertNode(New, InsertPos); 1426 return QualType(New, 0); 1427} 1428 1429/// getBlockPointerType - Return the uniqued reference to the type for 1430/// a pointer to the specified block. 1431QualType ASTContext::getBlockPointerType(QualType T) { 1432 assert(T->isFunctionType() && "block of function types only"); 1433 // Unique pointers, to guarantee there is only one block of a particular 1434 // structure. 1435 llvm::FoldingSetNodeID ID; 1436 BlockPointerType::Profile(ID, T); 1437 1438 void *InsertPos = 0; 1439 if (BlockPointerType *PT = 1440 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1441 return QualType(PT, 0); 1442 1443 // If the block pointee type isn't canonical, this won't be a canonical 1444 // type either so fill in the canonical type field. 1445 QualType Canonical; 1446 if (!T.isCanonical()) { 1447 Canonical = getBlockPointerType(getCanonicalType(T)); 1448 1449 // Get the new insert position for the node we care about. 1450 BlockPointerType *NewIP = 1451 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1452 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1453 } 1454 BlockPointerType *New 1455 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1456 Types.push_back(New); 1457 BlockPointerTypes.InsertNode(New, InsertPos); 1458 return QualType(New, 0); 1459} 1460 1461/// getLValueReferenceType - Return the uniqued reference to the type for an 1462/// lvalue reference to the specified type. 1463QualType ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) { 1464 // Unique pointers, to guarantee there is only one pointer of a particular 1465 // structure. 1466 llvm::FoldingSetNodeID ID; 1467 ReferenceType::Profile(ID, T, SpelledAsLValue); 1468 1469 void *InsertPos = 0; 1470 if (LValueReferenceType *RT = 1471 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1472 return QualType(RT, 0); 1473 1474 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1475 1476 // If the referencee type isn't canonical, this won't be a canonical type 1477 // either, so fill in the canonical type field. 1478 QualType Canonical; 1479 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1480 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1481 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1482 1483 // Get the new insert position for the node we care about. 1484 LValueReferenceType *NewIP = 1485 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1486 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1487 } 1488 1489 LValueReferenceType *New 1490 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1491 SpelledAsLValue); 1492 Types.push_back(New); 1493 LValueReferenceTypes.InsertNode(New, InsertPos); 1494 1495 return QualType(New, 0); 1496} 1497 1498/// getRValueReferenceType - Return the uniqued reference to the type for an 1499/// rvalue reference to the specified type. 1500QualType ASTContext::getRValueReferenceType(QualType T) { 1501 // Unique pointers, to guarantee there is only one pointer of a particular 1502 // structure. 1503 llvm::FoldingSetNodeID ID; 1504 ReferenceType::Profile(ID, T, false); 1505 1506 void *InsertPos = 0; 1507 if (RValueReferenceType *RT = 1508 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1509 return QualType(RT, 0); 1510 1511 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1512 1513 // If the referencee type isn't canonical, this won't be a canonical type 1514 // either, so fill in the canonical type field. 1515 QualType Canonical; 1516 if (InnerRef || !T.isCanonical()) { 1517 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1518 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1519 1520 // Get the new insert position for the node we care about. 1521 RValueReferenceType *NewIP = 1522 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1523 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1524 } 1525 1526 RValueReferenceType *New 1527 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1528 Types.push_back(New); 1529 RValueReferenceTypes.InsertNode(New, InsertPos); 1530 return QualType(New, 0); 1531} 1532 1533/// getMemberPointerType - Return the uniqued reference to the type for a 1534/// member pointer to the specified type, in the specified class. 1535QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) { 1536 // Unique pointers, to guarantee there is only one pointer of a particular 1537 // structure. 1538 llvm::FoldingSetNodeID ID; 1539 MemberPointerType::Profile(ID, T, Cls); 1540 1541 void *InsertPos = 0; 1542 if (MemberPointerType *PT = 1543 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1544 return QualType(PT, 0); 1545 1546 // If the pointee or class type isn't canonical, this won't be a canonical 1547 // type either, so fill in the canonical type field. 1548 QualType Canonical; 1549 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1550 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1551 1552 // Get the new insert position for the node we care about. 1553 MemberPointerType *NewIP = 1554 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1555 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1556 } 1557 MemberPointerType *New 1558 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1559 Types.push_back(New); 1560 MemberPointerTypes.InsertNode(New, InsertPos); 1561 return QualType(New, 0); 1562} 1563 1564/// getConstantArrayType - Return the unique reference to the type for an 1565/// array of the specified element type. 1566QualType ASTContext::getConstantArrayType(QualType EltTy, 1567 const llvm::APInt &ArySizeIn, 1568 ArrayType::ArraySizeModifier ASM, 1569 unsigned EltTypeQuals) { 1570 assert((EltTy->isDependentType() || 1571 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1572 "Constant array of VLAs is illegal!"); 1573 1574 // Convert the array size into a canonical width matching the pointer size for 1575 // the target. 1576 llvm::APInt ArySize(ArySizeIn); 1577 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1578 1579 llvm::FoldingSetNodeID ID; 1580 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1581 1582 void *InsertPos = 0; 1583 if (ConstantArrayType *ATP = 1584 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1585 return QualType(ATP, 0); 1586 1587 // If the element type isn't canonical, this won't be a canonical type either, 1588 // so fill in the canonical type field. 1589 QualType Canonical; 1590 if (!EltTy.isCanonical()) { 1591 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1592 ASM, EltTypeQuals); 1593 // Get the new insert position for the node we care about. 1594 ConstantArrayType *NewIP = 1595 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1596 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1597 } 1598 1599 ConstantArrayType *New = new(*this,TypeAlignment) 1600 ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1601 ConstantArrayTypes.InsertNode(New, InsertPos); 1602 Types.push_back(New); 1603 return QualType(New, 0); 1604} 1605 1606/// getVariableArrayType - Returns a non-unique reference to the type for a 1607/// variable array of the specified element type. 1608QualType ASTContext::getVariableArrayType(QualType EltTy, 1609 Expr *NumElts, 1610 ArrayType::ArraySizeModifier ASM, 1611 unsigned EltTypeQuals, 1612 SourceRange Brackets) { 1613 // Since we don't unique expressions, it isn't possible to unique VLA's 1614 // that have an expression provided for their size. 1615 1616 VariableArrayType *New = new(*this, TypeAlignment) 1617 VariableArrayType(EltTy, QualType(), NumElts, ASM, EltTypeQuals, Brackets); 1618 1619 VariableArrayTypes.push_back(New); 1620 Types.push_back(New); 1621 return QualType(New, 0); 1622} 1623 1624/// getDependentSizedArrayType - Returns a non-unique reference to 1625/// the type for a dependently-sized array of the specified element 1626/// type. 1627QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1628 Expr *NumElts, 1629 ArrayType::ArraySizeModifier ASM, 1630 unsigned EltTypeQuals, 1631 SourceRange Brackets) { 1632 assert((!NumElts || NumElts->isTypeDependent() || 1633 NumElts->isValueDependent()) && 1634 "Size must be type- or value-dependent!"); 1635 1636 void *InsertPos = 0; 1637 DependentSizedArrayType *Canon = 0; 1638 llvm::FoldingSetNodeID ID; 1639 1640 if (NumElts) { 1641 // Dependently-sized array types that do not have a specified 1642 // number of elements will have their sizes deduced from an 1643 // initializer. 1644 DependentSizedArrayType::Profile(ID, *this, getCanonicalType(EltTy), ASM, 1645 EltTypeQuals, NumElts); 1646 1647 Canon = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1648 } 1649 1650 DependentSizedArrayType *New; 1651 if (Canon) { 1652 // We already have a canonical version of this array type; use it as 1653 // the canonical type for a newly-built type. 1654 New = new (*this, TypeAlignment) 1655 DependentSizedArrayType(*this, EltTy, QualType(Canon, 0), 1656 NumElts, ASM, EltTypeQuals, Brackets); 1657 } else { 1658 QualType CanonEltTy = getCanonicalType(EltTy); 1659 if (CanonEltTy == EltTy) { 1660 New = new (*this, TypeAlignment) 1661 DependentSizedArrayType(*this, EltTy, QualType(), 1662 NumElts, ASM, EltTypeQuals, Brackets); 1663 1664 if (NumElts) { 1665 DependentSizedArrayType *CanonCheck 1666 = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1667 assert(!CanonCheck && "Dependent-sized canonical array type broken"); 1668 (void)CanonCheck; 1669 DependentSizedArrayTypes.InsertNode(New, InsertPos); 1670 } 1671 } else { 1672 QualType Canon = getDependentSizedArrayType(CanonEltTy, NumElts, 1673 ASM, EltTypeQuals, 1674 SourceRange()); 1675 New = new (*this, TypeAlignment) 1676 DependentSizedArrayType(*this, EltTy, Canon, 1677 NumElts, ASM, EltTypeQuals, Brackets); 1678 } 1679 } 1680 1681 Types.push_back(New); 1682 return QualType(New, 0); 1683} 1684 1685QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1686 ArrayType::ArraySizeModifier ASM, 1687 unsigned EltTypeQuals) { 1688 llvm::FoldingSetNodeID ID; 1689 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1690 1691 void *InsertPos = 0; 1692 if (IncompleteArrayType *ATP = 1693 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1694 return QualType(ATP, 0); 1695 1696 // If the element type isn't canonical, this won't be a canonical type 1697 // either, so fill in the canonical type field. 1698 QualType Canonical; 1699 1700 if (!EltTy.isCanonical()) { 1701 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1702 ASM, EltTypeQuals); 1703 1704 // Get the new insert position for the node we care about. 1705 IncompleteArrayType *NewIP = 1706 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1707 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1708 } 1709 1710 IncompleteArrayType *New = new (*this, TypeAlignment) 1711 IncompleteArrayType(EltTy, Canonical, ASM, EltTypeQuals); 1712 1713 IncompleteArrayTypes.InsertNode(New, InsertPos); 1714 Types.push_back(New); 1715 return QualType(New, 0); 1716} 1717 1718/// getVectorType - Return the unique reference to a vector type of 1719/// the specified element type and size. VectorType must be a built-in type. 1720QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1721 bool IsAltiVec, bool IsPixel) { 1722 BuiltinType *baseType; 1723 1724 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1725 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1726 1727 // Check if we've already instantiated a vector of this type. 1728 llvm::FoldingSetNodeID ID; 1729 VectorType::Profile(ID, vecType, NumElts, Type::Vector, 1730 IsAltiVec, IsPixel); 1731 void *InsertPos = 0; 1732 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1733 return QualType(VTP, 0); 1734 1735 // If the element type isn't canonical, this won't be a canonical type either, 1736 // so fill in the canonical type field. 1737 QualType Canonical; 1738 if (!vecType.isCanonical() || IsAltiVec || IsPixel) { 1739 Canonical = getVectorType(getCanonicalType(vecType), 1740 NumElts, false, false); 1741 1742 // Get the new insert position for the node we care about. 1743 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1744 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1745 } 1746 VectorType *New = new (*this, TypeAlignment) 1747 VectorType(vecType, NumElts, Canonical, IsAltiVec, IsPixel); 1748 VectorTypes.InsertNode(New, InsertPos); 1749 Types.push_back(New); 1750 return QualType(New, 0); 1751} 1752 1753/// getExtVectorType - Return the unique reference to an extended vector type of 1754/// the specified element type and size. VectorType must be a built-in type. 1755QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1756 BuiltinType *baseType; 1757 1758 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1759 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1760 1761 // Check if we've already instantiated a vector of this type. 1762 llvm::FoldingSetNodeID ID; 1763 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, false, false); 1764 void *InsertPos = 0; 1765 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1766 return QualType(VTP, 0); 1767 1768 // If the element type isn't canonical, this won't be a canonical type either, 1769 // so fill in the canonical type field. 1770 QualType Canonical; 1771 if (!vecType.isCanonical()) { 1772 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1773 1774 // Get the new insert position for the node we care about. 1775 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1776 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1777 } 1778 ExtVectorType *New = new (*this, TypeAlignment) 1779 ExtVectorType(vecType, NumElts, Canonical); 1780 VectorTypes.InsertNode(New, InsertPos); 1781 Types.push_back(New); 1782 return QualType(New, 0); 1783} 1784 1785QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1786 Expr *SizeExpr, 1787 SourceLocation AttrLoc) { 1788 llvm::FoldingSetNodeID ID; 1789 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1790 SizeExpr); 1791 1792 void *InsertPos = 0; 1793 DependentSizedExtVectorType *Canon 1794 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1795 DependentSizedExtVectorType *New; 1796 if (Canon) { 1797 // We already have a canonical version of this array type; use it as 1798 // the canonical type for a newly-built type. 1799 New = new (*this, TypeAlignment) 1800 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1801 SizeExpr, AttrLoc); 1802 } else { 1803 QualType CanonVecTy = getCanonicalType(vecType); 1804 if (CanonVecTy == vecType) { 1805 New = new (*this, TypeAlignment) 1806 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1807 AttrLoc); 1808 1809 DependentSizedExtVectorType *CanonCheck 1810 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1811 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1812 (void)CanonCheck; 1813 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1814 } else { 1815 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1816 SourceLocation()); 1817 New = new (*this, TypeAlignment) 1818 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1819 } 1820 } 1821 1822 Types.push_back(New); 1823 return QualType(New, 0); 1824} 1825 1826/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1827/// 1828QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, bool NoReturn, 1829 CallingConv CallConv) { 1830 // Unique functions, to guarantee there is only one function of a particular 1831 // structure. 1832 llvm::FoldingSetNodeID ID; 1833 FunctionNoProtoType::Profile(ID, ResultTy, NoReturn, CallConv); 1834 1835 void *InsertPos = 0; 1836 if (FunctionNoProtoType *FT = 1837 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1838 return QualType(FT, 0); 1839 1840 QualType Canonical; 1841 if (!ResultTy.isCanonical() || 1842 getCanonicalCallConv(CallConv) != CallConv) { 1843 Canonical = getFunctionNoProtoType(getCanonicalType(ResultTy), NoReturn, 1844 getCanonicalCallConv(CallConv)); 1845 1846 // Get the new insert position for the node we care about. 1847 FunctionNoProtoType *NewIP = 1848 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1849 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1850 } 1851 1852 FunctionNoProtoType *New = new (*this, TypeAlignment) 1853 FunctionNoProtoType(ResultTy, Canonical, NoReturn, CallConv); 1854 Types.push_back(New); 1855 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1856 return QualType(New, 0); 1857} 1858 1859/// getFunctionType - Return a normal function type with a typed argument 1860/// list. isVariadic indicates whether the argument list includes '...'. 1861QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1862 unsigned NumArgs, bool isVariadic, 1863 unsigned TypeQuals, bool hasExceptionSpec, 1864 bool hasAnyExceptionSpec, unsigned NumExs, 1865 const QualType *ExArray, bool NoReturn, 1866 CallingConv CallConv) { 1867 // Unique functions, to guarantee there is only one function of a particular 1868 // structure. 1869 llvm::FoldingSetNodeID ID; 1870 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1871 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1872 NumExs, ExArray, NoReturn, CallConv); 1873 1874 void *InsertPos = 0; 1875 if (FunctionProtoType *FTP = 1876 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1877 return QualType(FTP, 0); 1878 1879 // Determine whether the type being created is already canonical or not. 1880 bool isCanonical = !hasExceptionSpec && ResultTy.isCanonical(); 1881 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1882 if (!ArgArray[i].isCanonicalAsParam()) 1883 isCanonical = false; 1884 1885 // If this type isn't canonical, get the canonical version of it. 1886 // The exception spec is not part of the canonical type. 1887 QualType Canonical; 1888 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1889 llvm::SmallVector<QualType, 16> CanonicalArgs; 1890 CanonicalArgs.reserve(NumArgs); 1891 for (unsigned i = 0; i != NumArgs; ++i) 1892 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1893 1894 Canonical = getFunctionType(getCanonicalType(ResultTy), 1895 CanonicalArgs.data(), NumArgs, 1896 isVariadic, TypeQuals, false, 1897 false, 0, 0, NoReturn, 1898 getCanonicalCallConv(CallConv)); 1899 1900 // Get the new insert position for the node we care about. 1901 FunctionProtoType *NewIP = 1902 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1903 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1904 } 1905 1906 // FunctionProtoType objects are allocated with extra bytes after them 1907 // for two variable size arrays (for parameter and exception types) at the 1908 // end of them. 1909 FunctionProtoType *FTP = 1910 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1911 NumArgs*sizeof(QualType) + 1912 NumExs*sizeof(QualType), TypeAlignment); 1913 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1914 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1915 ExArray, NumExs, Canonical, NoReturn, CallConv); 1916 Types.push_back(FTP); 1917 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1918 return QualType(FTP, 0); 1919} 1920 1921/// getTypeDeclType - Return the unique reference to the type for the 1922/// specified type declaration. 1923QualType ASTContext::getTypeDeclType(const TypeDecl *Decl, 1924 const TypeDecl* PrevDecl) { 1925 assert(Decl && "Passed null for Decl param"); 1926 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1927 1928 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1929 return getTypedefType(Typedef); 1930 else if (isa<TemplateTypeParmDecl>(Decl)) { 1931 assert(false && "Template type parameter types are always available."); 1932 } else if (const ObjCInterfaceDecl *ObjCInterface 1933 = dyn_cast<ObjCInterfaceDecl>(Decl)) 1934 return getObjCInterfaceType(ObjCInterface); 1935 1936 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1937 if (PrevDecl) 1938 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1939 else 1940 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Record); 1941 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1942 if (PrevDecl) 1943 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1944 else 1945 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Enum); 1946 } else if (const UnresolvedUsingTypenameDecl *Using = 1947 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1948 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1949 } else 1950 assert(false && "TypeDecl without a type?"); 1951 1952 if (!PrevDecl) Types.push_back(Decl->TypeForDecl); 1953 return QualType(Decl->TypeForDecl, 0); 1954} 1955 1956/// getTypedefType - Return the unique reference to the type for the 1957/// specified typename decl. 1958QualType ASTContext::getTypedefType(const TypedefDecl *Decl) { 1959 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1960 1961 QualType Canonical = getCanonicalType(Decl->getUnderlyingType()); 1962 Decl->TypeForDecl = new(*this, TypeAlignment) 1963 TypedefType(Type::Typedef, Decl, Canonical); 1964 Types.push_back(Decl->TypeForDecl); 1965 return QualType(Decl->TypeForDecl, 0); 1966} 1967 1968/// \brief Retrieve a substitution-result type. 1969QualType 1970ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1971 QualType Replacement) { 1972 assert(Replacement.isCanonical() 1973 && "replacement types must always be canonical"); 1974 1975 llvm::FoldingSetNodeID ID; 1976 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1977 void *InsertPos = 0; 1978 SubstTemplateTypeParmType *SubstParm 1979 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1980 1981 if (!SubstParm) { 1982 SubstParm = new (*this, TypeAlignment) 1983 SubstTemplateTypeParmType(Parm, Replacement); 1984 Types.push_back(SubstParm); 1985 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1986 } 1987 1988 return QualType(SubstParm, 0); 1989} 1990 1991/// \brief Retrieve the template type parameter type for a template 1992/// parameter or parameter pack with the given depth, index, and (optionally) 1993/// name. 1994QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1995 bool ParameterPack, 1996 IdentifierInfo *Name) { 1997 llvm::FoldingSetNodeID ID; 1998 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1999 void *InsertPos = 0; 2000 TemplateTypeParmType *TypeParm 2001 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2002 2003 if (TypeParm) 2004 return QualType(TypeParm, 0); 2005 2006 if (Name) { 2007 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 2008 TypeParm = new (*this, TypeAlignment) 2009 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 2010 2011 TemplateTypeParmType *TypeCheck 2012 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2013 assert(!TypeCheck && "Template type parameter canonical type broken"); 2014 (void)TypeCheck; 2015 } else 2016 TypeParm = new (*this, TypeAlignment) 2017 TemplateTypeParmType(Depth, Index, ParameterPack); 2018 2019 Types.push_back(TypeParm); 2020 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 2021 2022 return QualType(TypeParm, 0); 2023} 2024 2025QualType 2026ASTContext::getTemplateSpecializationType(TemplateName Template, 2027 const TemplateArgumentListInfo &Args, 2028 QualType Canon) { 2029 unsigned NumArgs = Args.size(); 2030 2031 llvm::SmallVector<TemplateArgument, 4> ArgVec; 2032 ArgVec.reserve(NumArgs); 2033 for (unsigned i = 0; i != NumArgs; ++i) 2034 ArgVec.push_back(Args[i].getArgument()); 2035 2036 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, Canon); 2037} 2038 2039QualType 2040ASTContext::getTemplateSpecializationType(TemplateName Template, 2041 const TemplateArgument *Args, 2042 unsigned NumArgs, 2043 QualType Canon) { 2044 if (!Canon.isNull()) 2045 Canon = getCanonicalType(Canon); 2046 else { 2047 // Build the canonical template specialization type. 2048 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 2049 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 2050 CanonArgs.reserve(NumArgs); 2051 for (unsigned I = 0; I != NumArgs; ++I) 2052 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 2053 2054 // Determine whether this canonical template specialization type already 2055 // exists. 2056 llvm::FoldingSetNodeID ID; 2057 TemplateSpecializationType::Profile(ID, CanonTemplate, 2058 CanonArgs.data(), NumArgs, *this); 2059 2060 void *InsertPos = 0; 2061 TemplateSpecializationType *Spec 2062 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2063 2064 if (!Spec) { 2065 // Allocate a new canonical template specialization type. 2066 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2067 sizeof(TemplateArgument) * NumArgs), 2068 TypeAlignment); 2069 Spec = new (Mem) TemplateSpecializationType(*this, CanonTemplate, 2070 CanonArgs.data(), NumArgs, 2071 Canon); 2072 Types.push_back(Spec); 2073 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 2074 } 2075 2076 if (Canon.isNull()) 2077 Canon = QualType(Spec, 0); 2078 assert(Canon->isDependentType() && 2079 "Non-dependent template-id type must have a canonical type"); 2080 } 2081 2082 // Allocate the (non-canonical) template specialization type, but don't 2083 // try to unique it: these types typically have location information that 2084 // we don't unique and don't want to lose. 2085 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2086 sizeof(TemplateArgument) * NumArgs), 2087 TypeAlignment); 2088 TemplateSpecializationType *Spec 2089 = new (Mem) TemplateSpecializationType(*this, Template, Args, NumArgs, 2090 Canon); 2091 2092 Types.push_back(Spec); 2093 return QualType(Spec, 0); 2094} 2095 2096QualType 2097ASTContext::getQualifiedNameType(NestedNameSpecifier *NNS, 2098 QualType NamedType) { 2099 llvm::FoldingSetNodeID ID; 2100 QualifiedNameType::Profile(ID, NNS, NamedType); 2101 2102 void *InsertPos = 0; 2103 QualifiedNameType *T 2104 = QualifiedNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2105 if (T) 2106 return QualType(T, 0); 2107 2108 QualType Canon = NamedType; 2109 if (!Canon.isCanonical()) { 2110 Canon = getCanonicalType(NamedType); 2111 QualifiedNameType *CheckT 2112 = QualifiedNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2113 assert(!CheckT && "Qualified name canonical type broken"); 2114 (void)CheckT; 2115 } 2116 2117 T = new (*this) QualifiedNameType(NNS, NamedType, Canon); 2118 Types.push_back(T); 2119 QualifiedNameTypes.InsertNode(T, InsertPos); 2120 return QualType(T, 0); 2121} 2122 2123QualType ASTContext::getTypenameType(NestedNameSpecifier *NNS, 2124 const IdentifierInfo *Name, 2125 QualType Canon) { 2126 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2127 2128 if (Canon.isNull()) { 2129 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2130 if (CanonNNS != NNS) 2131 Canon = getTypenameType(CanonNNS, Name); 2132 } 2133 2134 llvm::FoldingSetNodeID ID; 2135 TypenameType::Profile(ID, NNS, Name); 2136 2137 void *InsertPos = 0; 2138 TypenameType *T 2139 = TypenameTypes.FindNodeOrInsertPos(ID, InsertPos); 2140 if (T) 2141 return QualType(T, 0); 2142 2143 T = new (*this) TypenameType(NNS, Name, Canon); 2144 Types.push_back(T); 2145 TypenameTypes.InsertNode(T, InsertPos); 2146 return QualType(T, 0); 2147} 2148 2149QualType 2150ASTContext::getTypenameType(NestedNameSpecifier *NNS, 2151 const TemplateSpecializationType *TemplateId, 2152 QualType Canon) { 2153 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2154 2155 llvm::FoldingSetNodeID ID; 2156 TypenameType::Profile(ID, NNS, TemplateId); 2157 2158 void *InsertPos = 0; 2159 TypenameType *T 2160 = TypenameTypes.FindNodeOrInsertPos(ID, InsertPos); 2161 if (T) 2162 return QualType(T, 0); 2163 2164 if (Canon.isNull()) { 2165 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2166 QualType CanonType = getCanonicalType(QualType(TemplateId, 0)); 2167 if (CanonNNS != NNS || CanonType != QualType(TemplateId, 0)) { 2168 const TemplateSpecializationType *CanonTemplateId 2169 = CanonType->getAs<TemplateSpecializationType>(); 2170 assert(CanonTemplateId && 2171 "Canonical type must also be a template specialization type"); 2172 Canon = getTypenameType(CanonNNS, CanonTemplateId); 2173 } 2174 2175 TypenameType *CheckT 2176 = TypenameTypes.FindNodeOrInsertPos(ID, InsertPos); 2177 assert(!CheckT && "Typename canonical type is broken"); (void)CheckT; 2178 } 2179 2180 T = new (*this) TypenameType(NNS, TemplateId, Canon); 2181 Types.push_back(T); 2182 TypenameTypes.InsertNode(T, InsertPos); 2183 return QualType(T, 0); 2184} 2185 2186QualType 2187ASTContext::getElaboratedType(QualType UnderlyingType, 2188 ElaboratedType::TagKind Tag) { 2189 llvm::FoldingSetNodeID ID; 2190 ElaboratedType::Profile(ID, UnderlyingType, Tag); 2191 2192 void *InsertPos = 0; 2193 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2194 if (T) 2195 return QualType(T, 0); 2196 2197 QualType Canon = UnderlyingType; 2198 if (!Canon.isCanonical()) { 2199 Canon = getCanonicalType(Canon); 2200 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2201 assert(!CheckT && "Elaborated canonical type is broken"); (void)CheckT; 2202 } 2203 2204 T = new (*this) ElaboratedType(UnderlyingType, Tag, Canon); 2205 Types.push_back(T); 2206 ElaboratedTypes.InsertNode(T, InsertPos); 2207 return QualType(T, 0); 2208} 2209 2210/// CmpProtocolNames - Comparison predicate for sorting protocols 2211/// alphabetically. 2212static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2213 const ObjCProtocolDecl *RHS) { 2214 return LHS->getDeclName() < RHS->getDeclName(); 2215} 2216 2217static bool areSortedAndUniqued(ObjCProtocolDecl **Protocols, 2218 unsigned NumProtocols) { 2219 if (NumProtocols == 0) return true; 2220 2221 for (unsigned i = 1; i != NumProtocols; ++i) 2222 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2223 return false; 2224 return true; 2225} 2226 2227static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2228 unsigned &NumProtocols) { 2229 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2230 2231 // Sort protocols, keyed by name. 2232 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2233 2234 // Remove duplicates. 2235 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2236 NumProtocols = ProtocolsEnd-Protocols; 2237} 2238 2239/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2240/// the given interface decl and the conforming protocol list. 2241QualType ASTContext::getObjCObjectPointerType(QualType InterfaceT, 2242 ObjCProtocolDecl **Protocols, 2243 unsigned NumProtocols) { 2244 llvm::FoldingSetNodeID ID; 2245 ObjCObjectPointerType::Profile(ID, InterfaceT, Protocols, NumProtocols); 2246 2247 void *InsertPos = 0; 2248 if (ObjCObjectPointerType *QT = 2249 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2250 return QualType(QT, 0); 2251 2252 // Sort the protocol list alphabetically to canonicalize it. 2253 QualType Canonical; 2254 if (!InterfaceT.isCanonical() || 2255 !areSortedAndUniqued(Protocols, NumProtocols)) { 2256 if (!areSortedAndUniqued(Protocols, NumProtocols)) { 2257 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(NumProtocols); 2258 unsigned UniqueCount = NumProtocols; 2259 2260 std::copy(Protocols, Protocols + NumProtocols, Sorted.begin()); 2261 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2262 2263 Canonical = getObjCObjectPointerType(getCanonicalType(InterfaceT), 2264 &Sorted[0], UniqueCount); 2265 } else { 2266 Canonical = getObjCObjectPointerType(getCanonicalType(InterfaceT), 2267 Protocols, NumProtocols); 2268 } 2269 2270 // Regenerate InsertPos. 2271 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2272 } 2273 2274 // No match. 2275 unsigned Size = sizeof(ObjCObjectPointerType) 2276 + NumProtocols * sizeof(ObjCProtocolDecl *); 2277 void *Mem = Allocate(Size, TypeAlignment); 2278 ObjCObjectPointerType *QType = new (Mem) ObjCObjectPointerType(Canonical, 2279 InterfaceT, 2280 Protocols, 2281 NumProtocols); 2282 2283 Types.push_back(QType); 2284 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2285 return QualType(QType, 0); 2286} 2287 2288/// getObjCInterfaceType - Return the unique reference to the type for the 2289/// specified ObjC interface decl. The list of protocols is optional. 2290QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 2291 ObjCProtocolDecl **Protocols, unsigned NumProtocols) { 2292 llvm::FoldingSetNodeID ID; 2293 ObjCInterfaceType::Profile(ID, Decl, Protocols, NumProtocols); 2294 2295 void *InsertPos = 0; 2296 if (ObjCInterfaceType *QT = 2297 ObjCInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos)) 2298 return QualType(QT, 0); 2299 2300 // Sort the protocol list alphabetically to canonicalize it. 2301 QualType Canonical; 2302 if (NumProtocols && !areSortedAndUniqued(Protocols, NumProtocols)) { 2303 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(NumProtocols); 2304 std::copy(Protocols, Protocols + NumProtocols, Sorted.begin()); 2305 2306 unsigned UniqueCount = NumProtocols; 2307 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2308 2309 Canonical = getObjCInterfaceType(Decl, &Sorted[0], UniqueCount); 2310 2311 ObjCInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos); 2312 } 2313 2314 unsigned Size = sizeof(ObjCInterfaceType) 2315 + NumProtocols * sizeof(ObjCProtocolDecl *); 2316 void *Mem = Allocate(Size, TypeAlignment); 2317 ObjCInterfaceType *QType = new (Mem) ObjCInterfaceType(Canonical, 2318 const_cast<ObjCInterfaceDecl*>(Decl), 2319 Protocols, 2320 NumProtocols); 2321 2322 Types.push_back(QType); 2323 ObjCInterfaceTypes.InsertNode(QType, InsertPos); 2324 return QualType(QType, 0); 2325} 2326 2327/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2328/// TypeOfExprType AST's (since expression's are never shared). For example, 2329/// multiple declarations that refer to "typeof(x)" all contain different 2330/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2331/// on canonical type's (which are always unique). 2332QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2333 TypeOfExprType *toe; 2334 if (tofExpr->isTypeDependent()) { 2335 llvm::FoldingSetNodeID ID; 2336 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2337 2338 void *InsertPos = 0; 2339 DependentTypeOfExprType *Canon 2340 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2341 if (Canon) { 2342 // We already have a "canonical" version of an identical, dependent 2343 // typeof(expr) type. Use that as our canonical type. 2344 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2345 QualType((TypeOfExprType*)Canon, 0)); 2346 } 2347 else { 2348 // Build a new, canonical typeof(expr) type. 2349 Canon 2350 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2351 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2352 toe = Canon; 2353 } 2354 } else { 2355 QualType Canonical = getCanonicalType(tofExpr->getType()); 2356 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2357 } 2358 Types.push_back(toe); 2359 return QualType(toe, 0); 2360} 2361 2362/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2363/// TypeOfType AST's. The only motivation to unique these nodes would be 2364/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2365/// an issue. This doesn't effect the type checker, since it operates 2366/// on canonical type's (which are always unique). 2367QualType ASTContext::getTypeOfType(QualType tofType) { 2368 QualType Canonical = getCanonicalType(tofType); 2369 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2370 Types.push_back(tot); 2371 return QualType(tot, 0); 2372} 2373 2374/// getDecltypeForExpr - Given an expr, will return the decltype for that 2375/// expression, according to the rules in C++0x [dcl.type.simple]p4 2376static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2377 if (e->isTypeDependent()) 2378 return Context.DependentTy; 2379 2380 // If e is an id expression or a class member access, decltype(e) is defined 2381 // as the type of the entity named by e. 2382 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2383 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2384 return VD->getType(); 2385 } 2386 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2387 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2388 return FD->getType(); 2389 } 2390 // If e is a function call or an invocation of an overloaded operator, 2391 // (parentheses around e are ignored), decltype(e) is defined as the 2392 // return type of that function. 2393 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2394 return CE->getCallReturnType(); 2395 2396 QualType T = e->getType(); 2397 2398 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2399 // defined as T&, otherwise decltype(e) is defined as T. 2400 if (e->isLvalue(Context) == Expr::LV_Valid) 2401 T = Context.getLValueReferenceType(T); 2402 2403 return T; 2404} 2405 2406/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2407/// DecltypeType AST's. The only motivation to unique these nodes would be 2408/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2409/// an issue. This doesn't effect the type checker, since it operates 2410/// on canonical type's (which are always unique). 2411QualType ASTContext::getDecltypeType(Expr *e) { 2412 DecltypeType *dt; 2413 if (e->isTypeDependent()) { 2414 llvm::FoldingSetNodeID ID; 2415 DependentDecltypeType::Profile(ID, *this, e); 2416 2417 void *InsertPos = 0; 2418 DependentDecltypeType *Canon 2419 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2420 if (Canon) { 2421 // We already have a "canonical" version of an equivalent, dependent 2422 // decltype type. Use that as our canonical type. 2423 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2424 QualType((DecltypeType*)Canon, 0)); 2425 } 2426 else { 2427 // Build a new, canonical typeof(expr) type. 2428 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2429 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2430 dt = Canon; 2431 } 2432 } else { 2433 QualType T = getDecltypeForExpr(e, *this); 2434 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2435 } 2436 Types.push_back(dt); 2437 return QualType(dt, 0); 2438} 2439 2440/// getTagDeclType - Return the unique reference to the type for the 2441/// specified TagDecl (struct/union/class/enum) decl. 2442QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2443 assert (Decl); 2444 // FIXME: What is the design on getTagDeclType when it requires casting 2445 // away const? mutable? 2446 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2447} 2448 2449/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2450/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2451/// needs to agree with the definition in <stddef.h>. 2452CanQualType ASTContext::getSizeType() const { 2453 return getFromTargetType(Target.getSizeType()); 2454} 2455 2456/// getSignedWCharType - Return the type of "signed wchar_t". 2457/// Used when in C++, as a GCC extension. 2458QualType ASTContext::getSignedWCharType() const { 2459 // FIXME: derive from "Target" ? 2460 return WCharTy; 2461} 2462 2463/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2464/// Used when in C++, as a GCC extension. 2465QualType ASTContext::getUnsignedWCharType() const { 2466 // FIXME: derive from "Target" ? 2467 return UnsignedIntTy; 2468} 2469 2470/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2471/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2472QualType ASTContext::getPointerDiffType() const { 2473 return getFromTargetType(Target.getPtrDiffType(0)); 2474} 2475 2476//===----------------------------------------------------------------------===// 2477// Type Operators 2478//===----------------------------------------------------------------------===// 2479 2480CanQualType ASTContext::getCanonicalParamType(QualType T) { 2481 // Push qualifiers into arrays, and then discard any remaining 2482 // qualifiers. 2483 T = getCanonicalType(T); 2484 const Type *Ty = T.getTypePtr(); 2485 2486 QualType Result; 2487 if (isa<ArrayType>(Ty)) { 2488 Result = getArrayDecayedType(QualType(Ty,0)); 2489 } else if (isa<FunctionType>(Ty)) { 2490 Result = getPointerType(QualType(Ty, 0)); 2491 } else { 2492 Result = QualType(Ty, 0); 2493 } 2494 2495 return CanQualType::CreateUnsafe(Result); 2496} 2497 2498/// getCanonicalType - Return the canonical (structural) type corresponding to 2499/// the specified potentially non-canonical type. The non-canonical version 2500/// of a type may have many "decorated" versions of types. Decorators can 2501/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2502/// to be free of any of these, allowing two canonical types to be compared 2503/// for exact equality with a simple pointer comparison. 2504CanQualType ASTContext::getCanonicalType(QualType T) { 2505 QualifierCollector Quals; 2506 const Type *Ptr = Quals.strip(T); 2507 QualType CanType = Ptr->getCanonicalTypeInternal(); 2508 2509 // The canonical internal type will be the canonical type *except* 2510 // that we push type qualifiers down through array types. 2511 2512 // If there are no new qualifiers to push down, stop here. 2513 if (!Quals.hasQualifiers()) 2514 return CanQualType::CreateUnsafe(CanType); 2515 2516 // If the type qualifiers are on an array type, get the canonical 2517 // type of the array with the qualifiers applied to the element 2518 // type. 2519 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2520 if (!AT) 2521 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2522 2523 // Get the canonical version of the element with the extra qualifiers on it. 2524 // This can recursively sink qualifiers through multiple levels of arrays. 2525 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2526 NewEltTy = getCanonicalType(NewEltTy); 2527 2528 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2529 return CanQualType::CreateUnsafe( 2530 getConstantArrayType(NewEltTy, CAT->getSize(), 2531 CAT->getSizeModifier(), 2532 CAT->getIndexTypeCVRQualifiers())); 2533 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2534 return CanQualType::CreateUnsafe( 2535 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2536 IAT->getIndexTypeCVRQualifiers())); 2537 2538 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2539 return CanQualType::CreateUnsafe( 2540 getDependentSizedArrayType(NewEltTy, 2541 DSAT->getSizeExpr() ? 2542 DSAT->getSizeExpr()->Retain() : 0, 2543 DSAT->getSizeModifier(), 2544 DSAT->getIndexTypeCVRQualifiers(), 2545 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2546 2547 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2548 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2549 VAT->getSizeExpr() ? 2550 VAT->getSizeExpr()->Retain() : 0, 2551 VAT->getSizeModifier(), 2552 VAT->getIndexTypeCVRQualifiers(), 2553 VAT->getBracketsRange())); 2554} 2555 2556QualType ASTContext::getUnqualifiedArrayType(QualType T, 2557 Qualifiers &Quals) { 2558 Quals = T.getQualifiers(); 2559 if (!isa<ArrayType>(T)) { 2560 return T.getUnqualifiedType(); 2561 } 2562 2563 const ArrayType *AT = cast<ArrayType>(T); 2564 QualType Elt = AT->getElementType(); 2565 QualType UnqualElt = getUnqualifiedArrayType(Elt, Quals); 2566 if (Elt == UnqualElt) 2567 return T; 2568 2569 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(T)) { 2570 return getConstantArrayType(UnqualElt, CAT->getSize(), 2571 CAT->getSizeModifier(), 0); 2572 } 2573 2574 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(T)) { 2575 return getIncompleteArrayType(UnqualElt, IAT->getSizeModifier(), 0); 2576 } 2577 2578 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(T); 2579 return getDependentSizedArrayType(UnqualElt, DSAT->getSizeExpr()->Retain(), 2580 DSAT->getSizeModifier(), 0, 2581 SourceRange()); 2582} 2583 2584DeclarationName ASTContext::getNameForTemplate(TemplateName Name) { 2585 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2586 return TD->getDeclName(); 2587 2588 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2589 if (DTN->isIdentifier()) { 2590 return DeclarationNames.getIdentifier(DTN->getIdentifier()); 2591 } else { 2592 return DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2593 } 2594 } 2595 2596 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2597 assert(Storage); 2598 return (*Storage->begin())->getDeclName(); 2599} 2600 2601TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2602 // If this template name refers to a template, the canonical 2603 // template name merely stores the template itself. 2604 if (TemplateDecl *Template = Name.getAsTemplateDecl()) 2605 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2606 2607 assert(!Name.getAsOverloadedTemplate()); 2608 2609 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2610 assert(DTN && "Non-dependent template names must refer to template decls."); 2611 return DTN->CanonicalTemplateName; 2612} 2613 2614bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2615 X = getCanonicalTemplateName(X); 2616 Y = getCanonicalTemplateName(Y); 2617 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2618} 2619 2620TemplateArgument 2621ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2622 switch (Arg.getKind()) { 2623 case TemplateArgument::Null: 2624 return Arg; 2625 2626 case TemplateArgument::Expression: 2627 return Arg; 2628 2629 case TemplateArgument::Declaration: 2630 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2631 2632 case TemplateArgument::Template: 2633 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2634 2635 case TemplateArgument::Integral: 2636 return TemplateArgument(*Arg.getAsIntegral(), 2637 getCanonicalType(Arg.getIntegralType())); 2638 2639 case TemplateArgument::Type: 2640 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2641 2642 case TemplateArgument::Pack: { 2643 // FIXME: Allocate in ASTContext 2644 TemplateArgument *CanonArgs = new TemplateArgument[Arg.pack_size()]; 2645 unsigned Idx = 0; 2646 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2647 AEnd = Arg.pack_end(); 2648 A != AEnd; (void)++A, ++Idx) 2649 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2650 2651 TemplateArgument Result; 2652 Result.setArgumentPack(CanonArgs, Arg.pack_size(), false); 2653 return Result; 2654 } 2655 } 2656 2657 // Silence GCC warning 2658 assert(false && "Unhandled template argument kind"); 2659 return TemplateArgument(); 2660} 2661 2662NestedNameSpecifier * 2663ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2664 if (!NNS) 2665 return 0; 2666 2667 switch (NNS->getKind()) { 2668 case NestedNameSpecifier::Identifier: 2669 // Canonicalize the prefix but keep the identifier the same. 2670 return NestedNameSpecifier::Create(*this, 2671 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2672 NNS->getAsIdentifier()); 2673 2674 case NestedNameSpecifier::Namespace: 2675 // A namespace is canonical; build a nested-name-specifier with 2676 // this namespace and no prefix. 2677 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2678 2679 case NestedNameSpecifier::TypeSpec: 2680 case NestedNameSpecifier::TypeSpecWithTemplate: { 2681 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2682 return NestedNameSpecifier::Create(*this, 0, 2683 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2684 T.getTypePtr()); 2685 } 2686 2687 case NestedNameSpecifier::Global: 2688 // The global specifier is canonical and unique. 2689 return NNS; 2690 } 2691 2692 // Required to silence a GCC warning 2693 return 0; 2694} 2695 2696 2697const ArrayType *ASTContext::getAsArrayType(QualType T) { 2698 // Handle the non-qualified case efficiently. 2699 if (!T.hasLocalQualifiers()) { 2700 // Handle the common positive case fast. 2701 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2702 return AT; 2703 } 2704 2705 // Handle the common negative case fast. 2706 QualType CType = T->getCanonicalTypeInternal(); 2707 if (!isa<ArrayType>(CType)) 2708 return 0; 2709 2710 // Apply any qualifiers from the array type to the element type. This 2711 // implements C99 6.7.3p8: "If the specification of an array type includes 2712 // any type qualifiers, the element type is so qualified, not the array type." 2713 2714 // If we get here, we either have type qualifiers on the type, or we have 2715 // sugar such as a typedef in the way. If we have type qualifiers on the type 2716 // we must propagate them down into the element type. 2717 2718 QualifierCollector Qs; 2719 const Type *Ty = Qs.strip(T.getDesugaredType()); 2720 2721 // If we have a simple case, just return now. 2722 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2723 if (ATy == 0 || Qs.empty()) 2724 return ATy; 2725 2726 // Otherwise, we have an array and we have qualifiers on it. Push the 2727 // qualifiers into the array element type and return a new array type. 2728 // Get the canonical version of the element with the extra qualifiers on it. 2729 // This can recursively sink qualifiers through multiple levels of arrays. 2730 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2731 2732 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2733 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2734 CAT->getSizeModifier(), 2735 CAT->getIndexTypeCVRQualifiers())); 2736 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2737 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2738 IAT->getSizeModifier(), 2739 IAT->getIndexTypeCVRQualifiers())); 2740 2741 if (const DependentSizedArrayType *DSAT 2742 = dyn_cast<DependentSizedArrayType>(ATy)) 2743 return cast<ArrayType>( 2744 getDependentSizedArrayType(NewEltTy, 2745 DSAT->getSizeExpr() ? 2746 DSAT->getSizeExpr()->Retain() : 0, 2747 DSAT->getSizeModifier(), 2748 DSAT->getIndexTypeCVRQualifiers(), 2749 DSAT->getBracketsRange())); 2750 2751 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2752 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2753 VAT->getSizeExpr() ? 2754 VAT->getSizeExpr()->Retain() : 0, 2755 VAT->getSizeModifier(), 2756 VAT->getIndexTypeCVRQualifiers(), 2757 VAT->getBracketsRange())); 2758} 2759 2760 2761/// getArrayDecayedType - Return the properly qualified result of decaying the 2762/// specified array type to a pointer. This operation is non-trivial when 2763/// handling typedefs etc. The canonical type of "T" must be an array type, 2764/// this returns a pointer to a properly qualified element of the array. 2765/// 2766/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2767QualType ASTContext::getArrayDecayedType(QualType Ty) { 2768 // Get the element type with 'getAsArrayType' so that we don't lose any 2769 // typedefs in the element type of the array. This also handles propagation 2770 // of type qualifiers from the array type into the element type if present 2771 // (C99 6.7.3p8). 2772 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2773 assert(PrettyArrayType && "Not an array type!"); 2774 2775 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2776 2777 // int x[restrict 4] -> int *restrict 2778 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2779} 2780 2781QualType ASTContext::getBaseElementType(QualType QT) { 2782 QualifierCollector Qs; 2783 while (true) { 2784 const Type *UT = Qs.strip(QT); 2785 if (const ArrayType *AT = getAsArrayType(QualType(UT,0))) { 2786 QT = AT->getElementType(); 2787 } else { 2788 return Qs.apply(QT); 2789 } 2790 } 2791} 2792 2793QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2794 QualType ElemTy = AT->getElementType(); 2795 2796 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2797 return getBaseElementType(AT); 2798 2799 return ElemTy; 2800} 2801 2802/// getConstantArrayElementCount - Returns number of constant array elements. 2803uint64_t 2804ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2805 uint64_t ElementCount = 1; 2806 do { 2807 ElementCount *= CA->getSize().getZExtValue(); 2808 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2809 } while (CA); 2810 return ElementCount; 2811} 2812 2813/// getFloatingRank - Return a relative rank for floating point types. 2814/// This routine will assert if passed a built-in type that isn't a float. 2815static FloatingRank getFloatingRank(QualType T) { 2816 if (const ComplexType *CT = T->getAs<ComplexType>()) 2817 return getFloatingRank(CT->getElementType()); 2818 2819 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2820 switch (T->getAs<BuiltinType>()->getKind()) { 2821 default: assert(0 && "getFloatingRank(): not a floating type"); 2822 case BuiltinType::Float: return FloatRank; 2823 case BuiltinType::Double: return DoubleRank; 2824 case BuiltinType::LongDouble: return LongDoubleRank; 2825 } 2826} 2827 2828/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2829/// point or a complex type (based on typeDomain/typeSize). 2830/// 'typeDomain' is a real floating point or complex type. 2831/// 'typeSize' is a real floating point or complex type. 2832QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2833 QualType Domain) const { 2834 FloatingRank EltRank = getFloatingRank(Size); 2835 if (Domain->isComplexType()) { 2836 switch (EltRank) { 2837 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2838 case FloatRank: return FloatComplexTy; 2839 case DoubleRank: return DoubleComplexTy; 2840 case LongDoubleRank: return LongDoubleComplexTy; 2841 } 2842 } 2843 2844 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2845 switch (EltRank) { 2846 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2847 case FloatRank: return FloatTy; 2848 case DoubleRank: return DoubleTy; 2849 case LongDoubleRank: return LongDoubleTy; 2850 } 2851} 2852 2853/// getFloatingTypeOrder - Compare the rank of the two specified floating 2854/// point types, ignoring the domain of the type (i.e. 'double' == 2855/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2856/// LHS < RHS, return -1. 2857int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2858 FloatingRank LHSR = getFloatingRank(LHS); 2859 FloatingRank RHSR = getFloatingRank(RHS); 2860 2861 if (LHSR == RHSR) 2862 return 0; 2863 if (LHSR > RHSR) 2864 return 1; 2865 return -1; 2866} 2867 2868/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2869/// routine will assert if passed a built-in type that isn't an integer or enum, 2870/// or if it is not canonicalized. 2871unsigned ASTContext::getIntegerRank(Type *T) { 2872 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2873 if (EnumType* ET = dyn_cast<EnumType>(T)) 2874 T = ET->getDecl()->getPromotionType().getTypePtr(); 2875 2876 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2877 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2878 2879 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2880 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2881 2882 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2883 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2884 2885 switch (cast<BuiltinType>(T)->getKind()) { 2886 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2887 case BuiltinType::Bool: 2888 return 1 + (getIntWidth(BoolTy) << 3); 2889 case BuiltinType::Char_S: 2890 case BuiltinType::Char_U: 2891 case BuiltinType::SChar: 2892 case BuiltinType::UChar: 2893 return 2 + (getIntWidth(CharTy) << 3); 2894 case BuiltinType::Short: 2895 case BuiltinType::UShort: 2896 return 3 + (getIntWidth(ShortTy) << 3); 2897 case BuiltinType::Int: 2898 case BuiltinType::UInt: 2899 return 4 + (getIntWidth(IntTy) << 3); 2900 case BuiltinType::Long: 2901 case BuiltinType::ULong: 2902 return 5 + (getIntWidth(LongTy) << 3); 2903 case BuiltinType::LongLong: 2904 case BuiltinType::ULongLong: 2905 return 6 + (getIntWidth(LongLongTy) << 3); 2906 case BuiltinType::Int128: 2907 case BuiltinType::UInt128: 2908 return 7 + (getIntWidth(Int128Ty) << 3); 2909 } 2910} 2911 2912/// \brief Whether this is a promotable bitfield reference according 2913/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 2914/// 2915/// \returns the type this bit-field will promote to, or NULL if no 2916/// promotion occurs. 2917QualType ASTContext::isPromotableBitField(Expr *E) { 2918 FieldDecl *Field = E->getBitField(); 2919 if (!Field) 2920 return QualType(); 2921 2922 QualType FT = Field->getType(); 2923 2924 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 2925 uint64_t BitWidth = BitWidthAP.getZExtValue(); 2926 uint64_t IntSize = getTypeSize(IntTy); 2927 // GCC extension compatibility: if the bit-field size is less than or equal 2928 // to the size of int, it gets promoted no matter what its type is. 2929 // For instance, unsigned long bf : 4 gets promoted to signed int. 2930 if (BitWidth < IntSize) 2931 return IntTy; 2932 2933 if (BitWidth == IntSize) 2934 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 2935 2936 // Types bigger than int are not subject to promotions, and therefore act 2937 // like the base type. 2938 // FIXME: This doesn't quite match what gcc does, but what gcc does here 2939 // is ridiculous. 2940 return QualType(); 2941} 2942 2943/// getPromotedIntegerType - Returns the type that Promotable will 2944/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 2945/// integer type. 2946QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 2947 assert(!Promotable.isNull()); 2948 assert(Promotable->isPromotableIntegerType()); 2949 if (const EnumType *ET = Promotable->getAs<EnumType>()) 2950 return ET->getDecl()->getPromotionType(); 2951 if (Promotable->isSignedIntegerType()) 2952 return IntTy; 2953 uint64_t PromotableSize = getTypeSize(Promotable); 2954 uint64_t IntSize = getTypeSize(IntTy); 2955 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 2956 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 2957} 2958 2959/// getIntegerTypeOrder - Returns the highest ranked integer type: 2960/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2961/// LHS < RHS, return -1. 2962int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2963 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2964 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2965 if (LHSC == RHSC) return 0; 2966 2967 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2968 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2969 2970 unsigned LHSRank = getIntegerRank(LHSC); 2971 unsigned RHSRank = getIntegerRank(RHSC); 2972 2973 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2974 if (LHSRank == RHSRank) return 0; 2975 return LHSRank > RHSRank ? 1 : -1; 2976 } 2977 2978 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2979 if (LHSUnsigned) { 2980 // If the unsigned [LHS] type is larger, return it. 2981 if (LHSRank >= RHSRank) 2982 return 1; 2983 2984 // If the signed type can represent all values of the unsigned type, it 2985 // wins. Because we are dealing with 2's complement and types that are 2986 // powers of two larger than each other, this is always safe. 2987 return -1; 2988 } 2989 2990 // If the unsigned [RHS] type is larger, return it. 2991 if (RHSRank >= LHSRank) 2992 return -1; 2993 2994 // If the signed type can represent all values of the unsigned type, it 2995 // wins. Because we are dealing with 2's complement and types that are 2996 // powers of two larger than each other, this is always safe. 2997 return 1; 2998} 2999 3000static RecordDecl * 3001CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 3002 SourceLocation L, IdentifierInfo *Id) { 3003 if (Ctx.getLangOptions().CPlusPlus) 3004 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 3005 else 3006 return RecordDecl::Create(Ctx, TK, DC, L, Id); 3007} 3008 3009// getCFConstantStringType - Return the type used for constant CFStrings. 3010QualType ASTContext::getCFConstantStringType() { 3011 if (!CFConstantStringTypeDecl) { 3012 CFConstantStringTypeDecl = 3013 CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 3014 &Idents.get("NSConstantString")); 3015 CFConstantStringTypeDecl->startDefinition(); 3016 3017 QualType FieldTypes[4]; 3018 3019 // const int *isa; 3020 FieldTypes[0] = getPointerType(IntTy.withConst()); 3021 // int flags; 3022 FieldTypes[1] = IntTy; 3023 // const char *str; 3024 FieldTypes[2] = getPointerType(CharTy.withConst()); 3025 // long length; 3026 FieldTypes[3] = LongTy; 3027 3028 // Create fields 3029 for (unsigned i = 0; i < 4; ++i) { 3030 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 3031 SourceLocation(), 0, 3032 FieldTypes[i], /*TInfo=*/0, 3033 /*BitWidth=*/0, 3034 /*Mutable=*/false); 3035 CFConstantStringTypeDecl->addDecl(Field); 3036 } 3037 3038 CFConstantStringTypeDecl->completeDefinition(); 3039 } 3040 3041 return getTagDeclType(CFConstantStringTypeDecl); 3042} 3043 3044void ASTContext::setCFConstantStringType(QualType T) { 3045 const RecordType *Rec = T->getAs<RecordType>(); 3046 assert(Rec && "Invalid CFConstantStringType"); 3047 CFConstantStringTypeDecl = Rec->getDecl(); 3048} 3049 3050QualType ASTContext::getObjCFastEnumerationStateType() { 3051 if (!ObjCFastEnumerationStateTypeDecl) { 3052 ObjCFastEnumerationStateTypeDecl = 3053 CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 3054 &Idents.get("__objcFastEnumerationState")); 3055 ObjCFastEnumerationStateTypeDecl->startDefinition(); 3056 3057 QualType FieldTypes[] = { 3058 UnsignedLongTy, 3059 getPointerType(ObjCIdTypedefType), 3060 getPointerType(UnsignedLongTy), 3061 getConstantArrayType(UnsignedLongTy, 3062 llvm::APInt(32, 5), ArrayType::Normal, 0) 3063 }; 3064 3065 for (size_t i = 0; i < 4; ++i) { 3066 FieldDecl *Field = FieldDecl::Create(*this, 3067 ObjCFastEnumerationStateTypeDecl, 3068 SourceLocation(), 0, 3069 FieldTypes[i], /*TInfo=*/0, 3070 /*BitWidth=*/0, 3071 /*Mutable=*/false); 3072 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 3073 } 3074 3075 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 3076 } 3077 3078 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 3079} 3080 3081QualType ASTContext::getBlockDescriptorType() { 3082 if (BlockDescriptorType) 3083 return getTagDeclType(BlockDescriptorType); 3084 3085 RecordDecl *T; 3086 // FIXME: Needs the FlagAppleBlock bit. 3087 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 3088 &Idents.get("__block_descriptor")); 3089 T->startDefinition(); 3090 3091 QualType FieldTypes[] = { 3092 UnsignedLongTy, 3093 UnsignedLongTy, 3094 }; 3095 3096 const char *FieldNames[] = { 3097 "reserved", 3098 "Size" 3099 }; 3100 3101 for (size_t i = 0; i < 2; ++i) { 3102 FieldDecl *Field = FieldDecl::Create(*this, 3103 T, 3104 SourceLocation(), 3105 &Idents.get(FieldNames[i]), 3106 FieldTypes[i], /*TInfo=*/0, 3107 /*BitWidth=*/0, 3108 /*Mutable=*/false); 3109 T->addDecl(Field); 3110 } 3111 3112 T->completeDefinition(); 3113 3114 BlockDescriptorType = T; 3115 3116 return getTagDeclType(BlockDescriptorType); 3117} 3118 3119void ASTContext::setBlockDescriptorType(QualType T) { 3120 const RecordType *Rec = T->getAs<RecordType>(); 3121 assert(Rec && "Invalid BlockDescriptorType"); 3122 BlockDescriptorType = Rec->getDecl(); 3123} 3124 3125QualType ASTContext::getBlockDescriptorExtendedType() { 3126 if (BlockDescriptorExtendedType) 3127 return getTagDeclType(BlockDescriptorExtendedType); 3128 3129 RecordDecl *T; 3130 // FIXME: Needs the FlagAppleBlock bit. 3131 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 3132 &Idents.get("__block_descriptor_withcopydispose")); 3133 T->startDefinition(); 3134 3135 QualType FieldTypes[] = { 3136 UnsignedLongTy, 3137 UnsignedLongTy, 3138 getPointerType(VoidPtrTy), 3139 getPointerType(VoidPtrTy) 3140 }; 3141 3142 const char *FieldNames[] = { 3143 "reserved", 3144 "Size", 3145 "CopyFuncPtr", 3146 "DestroyFuncPtr" 3147 }; 3148 3149 for (size_t i = 0; i < 4; ++i) { 3150 FieldDecl *Field = FieldDecl::Create(*this, 3151 T, 3152 SourceLocation(), 3153 &Idents.get(FieldNames[i]), 3154 FieldTypes[i], /*TInfo=*/0, 3155 /*BitWidth=*/0, 3156 /*Mutable=*/false); 3157 T->addDecl(Field); 3158 } 3159 3160 T->completeDefinition(); 3161 3162 BlockDescriptorExtendedType = T; 3163 3164 return getTagDeclType(BlockDescriptorExtendedType); 3165} 3166 3167void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3168 const RecordType *Rec = T->getAs<RecordType>(); 3169 assert(Rec && "Invalid BlockDescriptorType"); 3170 BlockDescriptorExtendedType = Rec->getDecl(); 3171} 3172 3173bool ASTContext::BlockRequiresCopying(QualType Ty) { 3174 if (Ty->isBlockPointerType()) 3175 return true; 3176 if (isObjCNSObjectType(Ty)) 3177 return true; 3178 if (Ty->isObjCObjectPointerType()) 3179 return true; 3180 return false; 3181} 3182 3183QualType ASTContext::BuildByRefType(const char *DeclName, QualType Ty) { 3184 // type = struct __Block_byref_1_X { 3185 // void *__isa; 3186 // struct __Block_byref_1_X *__forwarding; 3187 // unsigned int __flags; 3188 // unsigned int __size; 3189 // void *__copy_helper; // as needed 3190 // void *__destroy_help // as needed 3191 // int X; 3192 // } * 3193 3194 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3195 3196 // FIXME: Move up 3197 static unsigned int UniqueBlockByRefTypeID = 0; 3198 llvm::SmallString<36> Name; 3199 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3200 ++UniqueBlockByRefTypeID << '_' << DeclName; 3201 RecordDecl *T; 3202 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 3203 &Idents.get(Name.str())); 3204 T->startDefinition(); 3205 QualType Int32Ty = IntTy; 3206 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3207 QualType FieldTypes[] = { 3208 getPointerType(VoidPtrTy), 3209 getPointerType(getTagDeclType(T)), 3210 Int32Ty, 3211 Int32Ty, 3212 getPointerType(VoidPtrTy), 3213 getPointerType(VoidPtrTy), 3214 Ty 3215 }; 3216 3217 const char *FieldNames[] = { 3218 "__isa", 3219 "__forwarding", 3220 "__flags", 3221 "__size", 3222 "__copy_helper", 3223 "__destroy_helper", 3224 DeclName, 3225 }; 3226 3227 for (size_t i = 0; i < 7; ++i) { 3228 if (!HasCopyAndDispose && i >=4 && i <= 5) 3229 continue; 3230 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3231 &Idents.get(FieldNames[i]), 3232 FieldTypes[i], /*TInfo=*/0, 3233 /*BitWidth=*/0, /*Mutable=*/false); 3234 T->addDecl(Field); 3235 } 3236 3237 T->completeDefinition(); 3238 3239 return getPointerType(getTagDeclType(T)); 3240} 3241 3242 3243QualType ASTContext::getBlockParmType( 3244 bool BlockHasCopyDispose, 3245 llvm::SmallVector<const Expr *, 8> &BlockDeclRefDecls) { 3246 // FIXME: Move up 3247 static unsigned int UniqueBlockParmTypeID = 0; 3248 llvm::SmallString<36> Name; 3249 llvm::raw_svector_ostream(Name) << "__block_literal_" 3250 << ++UniqueBlockParmTypeID; 3251 RecordDecl *T; 3252 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 3253 &Idents.get(Name.str())); 3254 T->startDefinition(); 3255 QualType FieldTypes[] = { 3256 getPointerType(VoidPtrTy), 3257 IntTy, 3258 IntTy, 3259 getPointerType(VoidPtrTy), 3260 (BlockHasCopyDispose ? 3261 getPointerType(getBlockDescriptorExtendedType()) : 3262 getPointerType(getBlockDescriptorType())) 3263 }; 3264 3265 const char *FieldNames[] = { 3266 "__isa", 3267 "__flags", 3268 "__reserved", 3269 "__FuncPtr", 3270 "__descriptor" 3271 }; 3272 3273 for (size_t i = 0; i < 5; ++i) { 3274 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3275 &Idents.get(FieldNames[i]), 3276 FieldTypes[i], /*TInfo=*/0, 3277 /*BitWidth=*/0, /*Mutable=*/false); 3278 T->addDecl(Field); 3279 } 3280 3281 for (size_t i = 0; i < BlockDeclRefDecls.size(); ++i) { 3282 const Expr *E = BlockDeclRefDecls[i]; 3283 const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E); 3284 clang::IdentifierInfo *Name = 0; 3285 if (BDRE) { 3286 const ValueDecl *D = BDRE->getDecl(); 3287 Name = &Idents.get(D->getName()); 3288 } 3289 QualType FieldType = E->getType(); 3290 3291 if (BDRE && BDRE->isByRef()) 3292 FieldType = BuildByRefType(BDRE->getDecl()->getNameAsCString(), 3293 FieldType); 3294 3295 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3296 Name, FieldType, /*TInfo=*/0, 3297 /*BitWidth=*/0, /*Mutable=*/false); 3298 T->addDecl(Field); 3299 } 3300 3301 T->completeDefinition(); 3302 3303 return getPointerType(getTagDeclType(T)); 3304} 3305 3306void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3307 const RecordType *Rec = T->getAs<RecordType>(); 3308 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3309 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3310} 3311 3312// This returns true if a type has been typedefed to BOOL: 3313// typedef <type> BOOL; 3314static bool isTypeTypedefedAsBOOL(QualType T) { 3315 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3316 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3317 return II->isStr("BOOL"); 3318 3319 return false; 3320} 3321 3322/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3323/// purpose. 3324CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) { 3325 CharUnits sz = getTypeSizeInChars(type); 3326 3327 // Make all integer and enum types at least as large as an int 3328 if (sz.isPositive() && type->isIntegralType()) 3329 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3330 // Treat arrays as pointers, since that's how they're passed in. 3331 else if (type->isArrayType()) 3332 sz = getTypeSizeInChars(VoidPtrTy); 3333 return sz; 3334} 3335 3336static inline 3337std::string charUnitsToString(const CharUnits &CU) { 3338 return llvm::itostr(CU.getQuantity()); 3339} 3340 3341/// getObjCEncodingForBlockDecl - Return the encoded type for this method 3342/// declaration. 3343void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3344 std::string& S) { 3345 const BlockDecl *Decl = Expr->getBlockDecl(); 3346 QualType BlockTy = 3347 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3348 // Encode result type. 3349 getObjCEncodingForType(cast<FunctionType>(BlockTy)->getResultType(), S); 3350 // Compute size of all parameters. 3351 // Start with computing size of a pointer in number of bytes. 3352 // FIXME: There might(should) be a better way of doing this computation! 3353 SourceLocation Loc; 3354 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3355 CharUnits ParmOffset = PtrSize; 3356 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3357 E = Decl->param_end(); PI != E; ++PI) { 3358 QualType PType = (*PI)->getType(); 3359 CharUnits sz = getObjCEncodingTypeSize(PType); 3360 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3361 ParmOffset += sz; 3362 } 3363 // Size of the argument frame 3364 S += charUnitsToString(ParmOffset); 3365 // Block pointer and offset. 3366 S += "@?0"; 3367 ParmOffset = PtrSize; 3368 3369 // Argument types. 3370 ParmOffset = PtrSize; 3371 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3372 Decl->param_end(); PI != E; ++PI) { 3373 ParmVarDecl *PVDecl = *PI; 3374 QualType PType = PVDecl->getOriginalType(); 3375 if (const ArrayType *AT = 3376 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3377 // Use array's original type only if it has known number of 3378 // elements. 3379 if (!isa<ConstantArrayType>(AT)) 3380 PType = PVDecl->getType(); 3381 } else if (PType->isFunctionType()) 3382 PType = PVDecl->getType(); 3383 getObjCEncodingForType(PType, S); 3384 S += charUnitsToString(ParmOffset); 3385 ParmOffset += getObjCEncodingTypeSize(PType); 3386 } 3387} 3388 3389/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3390/// declaration. 3391void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3392 std::string& S) { 3393 // FIXME: This is not very efficient. 3394 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3395 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3396 // Encode result type. 3397 getObjCEncodingForType(Decl->getResultType(), S); 3398 // Compute size of all parameters. 3399 // Start with computing size of a pointer in number of bytes. 3400 // FIXME: There might(should) be a better way of doing this computation! 3401 SourceLocation Loc; 3402 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3403 // The first two arguments (self and _cmd) are pointers; account for 3404 // their size. 3405 CharUnits ParmOffset = 2 * PtrSize; 3406 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3407 E = Decl->param_end(); PI != E; ++PI) { 3408 QualType PType = (*PI)->getType(); 3409 CharUnits sz = getObjCEncodingTypeSize(PType); 3410 assert (sz.isPositive() && 3411 "getObjCEncodingForMethodDecl - Incomplete param type"); 3412 ParmOffset += sz; 3413 } 3414 S += charUnitsToString(ParmOffset); 3415 S += "@0:"; 3416 S += charUnitsToString(PtrSize); 3417 3418 // Argument types. 3419 ParmOffset = 2 * PtrSize; 3420 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3421 E = Decl->param_end(); PI != E; ++PI) { 3422 ParmVarDecl *PVDecl = *PI; 3423 QualType PType = PVDecl->getOriginalType(); 3424 if (const ArrayType *AT = 3425 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3426 // Use array's original type only if it has known number of 3427 // elements. 3428 if (!isa<ConstantArrayType>(AT)) 3429 PType = PVDecl->getType(); 3430 } else if (PType->isFunctionType()) 3431 PType = PVDecl->getType(); 3432 // Process argument qualifiers for user supplied arguments; such as, 3433 // 'in', 'inout', etc. 3434 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3435 getObjCEncodingForType(PType, S); 3436 S += charUnitsToString(ParmOffset); 3437 ParmOffset += getObjCEncodingTypeSize(PType); 3438 } 3439} 3440 3441/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3442/// property declaration. If non-NULL, Container must be either an 3443/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3444/// NULL when getting encodings for protocol properties. 3445/// Property attributes are stored as a comma-delimited C string. The simple 3446/// attributes readonly and bycopy are encoded as single characters. The 3447/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3448/// encoded as single characters, followed by an identifier. Property types 3449/// are also encoded as a parametrized attribute. The characters used to encode 3450/// these attributes are defined by the following enumeration: 3451/// @code 3452/// enum PropertyAttributes { 3453/// kPropertyReadOnly = 'R', // property is read-only. 3454/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3455/// kPropertyByref = '&', // property is a reference to the value last assigned 3456/// kPropertyDynamic = 'D', // property is dynamic 3457/// kPropertyGetter = 'G', // followed by getter selector name 3458/// kPropertySetter = 'S', // followed by setter selector name 3459/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3460/// kPropertyType = 't' // followed by old-style type encoding. 3461/// kPropertyWeak = 'W' // 'weak' property 3462/// kPropertyStrong = 'P' // property GC'able 3463/// kPropertyNonAtomic = 'N' // property non-atomic 3464/// }; 3465/// @endcode 3466void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3467 const Decl *Container, 3468 std::string& S) { 3469 // Collect information from the property implementation decl(s). 3470 bool Dynamic = false; 3471 ObjCPropertyImplDecl *SynthesizePID = 0; 3472 3473 // FIXME: Duplicated code due to poor abstraction. 3474 if (Container) { 3475 if (const ObjCCategoryImplDecl *CID = 3476 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3477 for (ObjCCategoryImplDecl::propimpl_iterator 3478 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3479 i != e; ++i) { 3480 ObjCPropertyImplDecl *PID = *i; 3481 if (PID->getPropertyDecl() == PD) { 3482 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3483 Dynamic = true; 3484 } else { 3485 SynthesizePID = PID; 3486 } 3487 } 3488 } 3489 } else { 3490 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3491 for (ObjCCategoryImplDecl::propimpl_iterator 3492 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3493 i != e; ++i) { 3494 ObjCPropertyImplDecl *PID = *i; 3495 if (PID->getPropertyDecl() == PD) { 3496 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3497 Dynamic = true; 3498 } else { 3499 SynthesizePID = PID; 3500 } 3501 } 3502 } 3503 } 3504 } 3505 3506 // FIXME: This is not very efficient. 3507 S = "T"; 3508 3509 // Encode result type. 3510 // GCC has some special rules regarding encoding of properties which 3511 // closely resembles encoding of ivars. 3512 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3513 true /* outermost type */, 3514 true /* encoding for property */); 3515 3516 if (PD->isReadOnly()) { 3517 S += ",R"; 3518 } else { 3519 switch (PD->getSetterKind()) { 3520 case ObjCPropertyDecl::Assign: break; 3521 case ObjCPropertyDecl::Copy: S += ",C"; break; 3522 case ObjCPropertyDecl::Retain: S += ",&"; break; 3523 } 3524 } 3525 3526 // It really isn't clear at all what this means, since properties 3527 // are "dynamic by default". 3528 if (Dynamic) 3529 S += ",D"; 3530 3531 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3532 S += ",N"; 3533 3534 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3535 S += ",G"; 3536 S += PD->getGetterName().getAsString(); 3537 } 3538 3539 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3540 S += ",S"; 3541 S += PD->getSetterName().getAsString(); 3542 } 3543 3544 if (SynthesizePID) { 3545 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3546 S += ",V"; 3547 S += OID->getNameAsString(); 3548 } 3549 3550 // FIXME: OBJCGC: weak & strong 3551} 3552 3553/// getLegacyIntegralTypeEncoding - 3554/// Another legacy compatibility encoding: 32-bit longs are encoded as 3555/// 'l' or 'L' , but not always. For typedefs, we need to use 3556/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3557/// 3558void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3559 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3560 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3561 if (BT->getKind() == BuiltinType::ULong && 3562 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3563 PointeeTy = UnsignedIntTy; 3564 else 3565 if (BT->getKind() == BuiltinType::Long && 3566 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3567 PointeeTy = IntTy; 3568 } 3569 } 3570} 3571 3572void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3573 const FieldDecl *Field) { 3574 // We follow the behavior of gcc, expanding structures which are 3575 // directly pointed to, and expanding embedded structures. Note that 3576 // these rules are sufficient to prevent recursive encoding of the 3577 // same type. 3578 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3579 true /* outermost type */); 3580} 3581 3582static void EncodeBitField(const ASTContext *Context, std::string& S, 3583 const FieldDecl *FD) { 3584 const Expr *E = FD->getBitWidth(); 3585 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3586 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3587 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3588 S += 'b'; 3589 S += llvm::utostr(N); 3590} 3591 3592// FIXME: Use SmallString for accumulating string. 3593void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3594 bool ExpandPointedToStructures, 3595 bool ExpandStructures, 3596 const FieldDecl *FD, 3597 bool OutermostType, 3598 bool EncodingProperty) { 3599 if (const BuiltinType *BT = T->getAs<BuiltinType>()) { 3600 if (FD && FD->isBitField()) 3601 return EncodeBitField(this, S, FD); 3602 char encoding; 3603 switch (BT->getKind()) { 3604 default: assert(0 && "Unhandled builtin type kind"); 3605 case BuiltinType::Void: encoding = 'v'; break; 3606 case BuiltinType::Bool: encoding = 'B'; break; 3607 case BuiltinType::Char_U: 3608 case BuiltinType::UChar: encoding = 'C'; break; 3609 case BuiltinType::UShort: encoding = 'S'; break; 3610 case BuiltinType::UInt: encoding = 'I'; break; 3611 case BuiltinType::ULong: 3612 encoding = 3613 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3614 break; 3615 case BuiltinType::UInt128: encoding = 'T'; break; 3616 case BuiltinType::ULongLong: encoding = 'Q'; break; 3617 case BuiltinType::Char_S: 3618 case BuiltinType::SChar: encoding = 'c'; break; 3619 case BuiltinType::Short: encoding = 's'; break; 3620 case BuiltinType::Int: encoding = 'i'; break; 3621 case BuiltinType::Long: 3622 encoding = 3623 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'l' : 'q'; 3624 break; 3625 case BuiltinType::LongLong: encoding = 'q'; break; 3626 case BuiltinType::Int128: encoding = 't'; break; 3627 case BuiltinType::Float: encoding = 'f'; break; 3628 case BuiltinType::Double: encoding = 'd'; break; 3629 case BuiltinType::LongDouble: encoding = 'd'; break; 3630 } 3631 3632 S += encoding; 3633 return; 3634 } 3635 3636 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3637 S += 'j'; 3638 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3639 false); 3640 return; 3641 } 3642 3643 if (const PointerType *PT = T->getAs<PointerType>()) { 3644 if (PT->isObjCSelType()) { 3645 S += ':'; 3646 return; 3647 } 3648 QualType PointeeTy = PT->getPointeeType(); 3649 3650 bool isReadOnly = false; 3651 // For historical/compatibility reasons, the read-only qualifier of the 3652 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3653 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3654 // Also, do not emit the 'r' for anything but the outermost type! 3655 if (isa<TypedefType>(T.getTypePtr())) { 3656 if (OutermostType && T.isConstQualified()) { 3657 isReadOnly = true; 3658 S += 'r'; 3659 } 3660 } else if (OutermostType) { 3661 QualType P = PointeeTy; 3662 while (P->getAs<PointerType>()) 3663 P = P->getAs<PointerType>()->getPointeeType(); 3664 if (P.isConstQualified()) { 3665 isReadOnly = true; 3666 S += 'r'; 3667 } 3668 } 3669 if (isReadOnly) { 3670 // Another legacy compatibility encoding. Some ObjC qualifier and type 3671 // combinations need to be rearranged. 3672 // Rewrite "in const" from "nr" to "rn" 3673 const char * s = S.c_str(); 3674 int len = S.length(); 3675 if (len >= 2 && s[len-2] == 'n' && s[len-1] == 'r') { 3676 std::string replace = "rn"; 3677 S.replace(S.end()-2, S.end(), replace); 3678 } 3679 } 3680 3681 if (PointeeTy->isCharType()) { 3682 // char pointer types should be encoded as '*' unless it is a 3683 // type that has been typedef'd to 'BOOL'. 3684 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3685 S += '*'; 3686 return; 3687 } 3688 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3689 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3690 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3691 S += '#'; 3692 return; 3693 } 3694 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3695 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3696 S += '@'; 3697 return; 3698 } 3699 // fall through... 3700 } 3701 S += '^'; 3702 getLegacyIntegralTypeEncoding(PointeeTy); 3703 3704 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3705 NULL); 3706 return; 3707 } 3708 3709 if (const ArrayType *AT = 3710 // Ignore type qualifiers etc. 3711 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3712 if (isa<IncompleteArrayType>(AT)) { 3713 // Incomplete arrays are encoded as a pointer to the array element. 3714 S += '^'; 3715 3716 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3717 false, ExpandStructures, FD); 3718 } else { 3719 S += '['; 3720 3721 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3722 S += llvm::utostr(CAT->getSize().getZExtValue()); 3723 else { 3724 //Variable length arrays are encoded as a regular array with 0 elements. 3725 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3726 S += '0'; 3727 } 3728 3729 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3730 false, ExpandStructures, FD); 3731 S += ']'; 3732 } 3733 return; 3734 } 3735 3736 if (T->getAs<FunctionType>()) { 3737 S += '?'; 3738 return; 3739 } 3740 3741 if (const RecordType *RTy = T->getAs<RecordType>()) { 3742 RecordDecl *RDecl = RTy->getDecl(); 3743 S += RDecl->isUnion() ? '(' : '{'; 3744 // Anonymous structures print as '?' 3745 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3746 S += II->getName(); 3747 } else { 3748 S += '?'; 3749 } 3750 if (ExpandStructures) { 3751 S += '='; 3752 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3753 FieldEnd = RDecl->field_end(); 3754 Field != FieldEnd; ++Field) { 3755 if (FD) { 3756 S += '"'; 3757 S += Field->getNameAsString(); 3758 S += '"'; 3759 } 3760 3761 // Special case bit-fields. 3762 if (Field->isBitField()) { 3763 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3764 (*Field)); 3765 } else { 3766 QualType qt = Field->getType(); 3767 getLegacyIntegralTypeEncoding(qt); 3768 getObjCEncodingForTypeImpl(qt, S, false, true, 3769 FD); 3770 } 3771 } 3772 } 3773 S += RDecl->isUnion() ? ')' : '}'; 3774 return; 3775 } 3776 3777 if (T->isEnumeralType()) { 3778 if (FD && FD->isBitField()) 3779 EncodeBitField(this, S, FD); 3780 else 3781 S += 'i'; 3782 return; 3783 } 3784 3785 if (T->isBlockPointerType()) { 3786 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3787 return; 3788 } 3789 3790 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3791 // @encode(class_name) 3792 ObjCInterfaceDecl *OI = OIT->getDecl(); 3793 S += '{'; 3794 const IdentifierInfo *II = OI->getIdentifier(); 3795 S += II->getName(); 3796 S += '='; 3797 llvm::SmallVector<FieldDecl*, 32> RecFields; 3798 CollectObjCIvars(OI, RecFields); 3799 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 3800 if (RecFields[i]->isBitField()) 3801 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3802 RecFields[i]); 3803 else 3804 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3805 FD); 3806 } 3807 S += '}'; 3808 return; 3809 } 3810 3811 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 3812 if (OPT->isObjCIdType()) { 3813 S += '@'; 3814 return; 3815 } 3816 3817 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 3818 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 3819 // Since this is a binary compatibility issue, need to consult with runtime 3820 // folks. Fortunately, this is a *very* obsure construct. 3821 S += '#'; 3822 return; 3823 } 3824 3825 if (OPT->isObjCQualifiedIdType()) { 3826 getObjCEncodingForTypeImpl(getObjCIdType(), S, 3827 ExpandPointedToStructures, 3828 ExpandStructures, FD); 3829 if (FD || EncodingProperty) { 3830 // Note that we do extended encoding of protocol qualifer list 3831 // Only when doing ivar or property encoding. 3832 S += '"'; 3833 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3834 E = OPT->qual_end(); I != E; ++I) { 3835 S += '<'; 3836 S += (*I)->getNameAsString(); 3837 S += '>'; 3838 } 3839 S += '"'; 3840 } 3841 return; 3842 } 3843 3844 QualType PointeeTy = OPT->getPointeeType(); 3845 if (!EncodingProperty && 3846 isa<TypedefType>(PointeeTy.getTypePtr())) { 3847 // Another historical/compatibility reason. 3848 // We encode the underlying type which comes out as 3849 // {...}; 3850 S += '^'; 3851 getObjCEncodingForTypeImpl(PointeeTy, S, 3852 false, ExpandPointedToStructures, 3853 NULL); 3854 return; 3855 } 3856 3857 S += '@'; 3858 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 3859 S += '"'; 3860 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 3861 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3862 E = OPT->qual_end(); I != E; ++I) { 3863 S += '<'; 3864 S += (*I)->getNameAsString(); 3865 S += '>'; 3866 } 3867 S += '"'; 3868 } 3869 return; 3870 } 3871 3872 assert(0 && "@encode for type not implemented!"); 3873} 3874 3875void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 3876 std::string& S) const { 3877 if (QT & Decl::OBJC_TQ_In) 3878 S += 'n'; 3879 if (QT & Decl::OBJC_TQ_Inout) 3880 S += 'N'; 3881 if (QT & Decl::OBJC_TQ_Out) 3882 S += 'o'; 3883 if (QT & Decl::OBJC_TQ_Bycopy) 3884 S += 'O'; 3885 if (QT & Decl::OBJC_TQ_Byref) 3886 S += 'R'; 3887 if (QT & Decl::OBJC_TQ_Oneway) 3888 S += 'V'; 3889} 3890 3891void ASTContext::setBuiltinVaListType(QualType T) { 3892 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 3893 3894 BuiltinVaListType = T; 3895} 3896 3897void ASTContext::setObjCIdType(QualType T) { 3898 ObjCIdTypedefType = T; 3899} 3900 3901void ASTContext::setObjCSelType(QualType T) { 3902 ObjCSelTypedefType = T; 3903} 3904 3905void ASTContext::setObjCProtoType(QualType QT) { 3906 ObjCProtoType = QT; 3907} 3908 3909void ASTContext::setObjCClassType(QualType T) { 3910 ObjCClassTypedefType = T; 3911} 3912 3913void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 3914 assert(ObjCConstantStringType.isNull() && 3915 "'NSConstantString' type already set!"); 3916 3917 ObjCConstantStringType = getObjCInterfaceType(Decl); 3918} 3919 3920/// \brief Retrieve the template name that corresponds to a non-empty 3921/// lookup. 3922TemplateName ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 3923 UnresolvedSetIterator End) { 3924 unsigned size = End - Begin; 3925 assert(size > 1 && "set is not overloaded!"); 3926 3927 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 3928 size * sizeof(FunctionTemplateDecl*)); 3929 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 3930 3931 NamedDecl **Storage = OT->getStorage(); 3932 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 3933 NamedDecl *D = *I; 3934 assert(isa<FunctionTemplateDecl>(D) || 3935 (isa<UsingShadowDecl>(D) && 3936 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 3937 *Storage++ = D; 3938 } 3939 3940 return TemplateName(OT); 3941} 3942 3943/// \brief Retrieve the template name that represents a qualified 3944/// template name such as \c std::vector. 3945TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 3946 bool TemplateKeyword, 3947 TemplateDecl *Template) { 3948 // FIXME: Canonicalization? 3949 llvm::FoldingSetNodeID ID; 3950 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 3951 3952 void *InsertPos = 0; 3953 QualifiedTemplateName *QTN = 3954 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3955 if (!QTN) { 3956 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 3957 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 3958 } 3959 3960 return TemplateName(QTN); 3961} 3962 3963/// \brief Retrieve the template name that represents a dependent 3964/// template name such as \c MetaFun::template apply. 3965TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3966 const IdentifierInfo *Name) { 3967 assert((!NNS || NNS->isDependent()) && 3968 "Nested name specifier must be dependent"); 3969 3970 llvm::FoldingSetNodeID ID; 3971 DependentTemplateName::Profile(ID, NNS, Name); 3972 3973 void *InsertPos = 0; 3974 DependentTemplateName *QTN = 3975 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3976 3977 if (QTN) 3978 return TemplateName(QTN); 3979 3980 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3981 if (CanonNNS == NNS) { 3982 QTN = new (*this,4) DependentTemplateName(NNS, Name); 3983 } else { 3984 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 3985 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 3986 DependentTemplateName *CheckQTN = 3987 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3988 assert(!CheckQTN && "Dependent type name canonicalization broken"); 3989 (void)CheckQTN; 3990 } 3991 3992 DependentTemplateNames.InsertNode(QTN, InsertPos); 3993 return TemplateName(QTN); 3994} 3995 3996/// \brief Retrieve the template name that represents a dependent 3997/// template name such as \c MetaFun::template operator+. 3998TemplateName 3999ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4000 OverloadedOperatorKind Operator) { 4001 assert((!NNS || NNS->isDependent()) && 4002 "Nested name specifier must be dependent"); 4003 4004 llvm::FoldingSetNodeID ID; 4005 DependentTemplateName::Profile(ID, NNS, Operator); 4006 4007 void *InsertPos = 0; 4008 DependentTemplateName *QTN 4009 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4010 4011 if (QTN) 4012 return TemplateName(QTN); 4013 4014 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4015 if (CanonNNS == NNS) { 4016 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 4017 } else { 4018 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 4019 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 4020 4021 DependentTemplateName *CheckQTN 4022 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4023 assert(!CheckQTN && "Dependent template name canonicalization broken"); 4024 (void)CheckQTN; 4025 } 4026 4027 DependentTemplateNames.InsertNode(QTN, InsertPos); 4028 return TemplateName(QTN); 4029} 4030 4031/// getFromTargetType - Given one of the integer types provided by 4032/// TargetInfo, produce the corresponding type. The unsigned @p Type 4033/// is actually a value of type @c TargetInfo::IntType. 4034CanQualType ASTContext::getFromTargetType(unsigned Type) const { 4035 switch (Type) { 4036 case TargetInfo::NoInt: return CanQualType(); 4037 case TargetInfo::SignedShort: return ShortTy; 4038 case TargetInfo::UnsignedShort: return UnsignedShortTy; 4039 case TargetInfo::SignedInt: return IntTy; 4040 case TargetInfo::UnsignedInt: return UnsignedIntTy; 4041 case TargetInfo::SignedLong: return LongTy; 4042 case TargetInfo::UnsignedLong: return UnsignedLongTy; 4043 case TargetInfo::SignedLongLong: return LongLongTy; 4044 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 4045 } 4046 4047 assert(false && "Unhandled TargetInfo::IntType value"); 4048 return CanQualType(); 4049} 4050 4051//===----------------------------------------------------------------------===// 4052// Type Predicates. 4053//===----------------------------------------------------------------------===// 4054 4055/// isObjCNSObjectType - Return true if this is an NSObject object using 4056/// NSObject attribute on a c-style pointer type. 4057/// FIXME - Make it work directly on types. 4058/// FIXME: Move to Type. 4059/// 4060bool ASTContext::isObjCNSObjectType(QualType Ty) const { 4061 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 4062 if (TypedefDecl *TD = TDT->getDecl()) 4063 if (TD->getAttr<ObjCNSObjectAttr>()) 4064 return true; 4065 } 4066 return false; 4067} 4068 4069/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 4070/// garbage collection attribute. 4071/// 4072Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 4073 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 4074 if (getLangOptions().ObjC1 && 4075 getLangOptions().getGCMode() != LangOptions::NonGC) { 4076 GCAttrs = Ty.getObjCGCAttr(); 4077 // Default behavious under objective-c's gc is for objective-c pointers 4078 // (or pointers to them) be treated as though they were declared 4079 // as __strong. 4080 if (GCAttrs == Qualifiers::GCNone) { 4081 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 4082 GCAttrs = Qualifiers::Strong; 4083 else if (Ty->isPointerType()) 4084 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 4085 } 4086 // Non-pointers have none gc'able attribute regardless of the attribute 4087 // set on them. 4088 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 4089 return Qualifiers::GCNone; 4090 } 4091 return GCAttrs; 4092} 4093 4094//===----------------------------------------------------------------------===// 4095// Type Compatibility Testing 4096//===----------------------------------------------------------------------===// 4097 4098/// areCompatVectorTypes - Return true if the two specified vector types are 4099/// compatible. 4100static bool areCompatVectorTypes(const VectorType *LHS, 4101 const VectorType *RHS) { 4102 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 4103 return LHS->getElementType() == RHS->getElementType() && 4104 LHS->getNumElements() == RHS->getNumElements(); 4105} 4106 4107//===----------------------------------------------------------------------===// 4108// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 4109//===----------------------------------------------------------------------===// 4110 4111/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 4112/// inheritance hierarchy of 'rProto'. 4113bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 4114 ObjCProtocolDecl *rProto) { 4115 if (lProto == rProto) 4116 return true; 4117 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 4118 E = rProto->protocol_end(); PI != E; ++PI) 4119 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 4120 return true; 4121 return false; 4122} 4123 4124/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 4125/// return true if lhs's protocols conform to rhs's protocol; false 4126/// otherwise. 4127bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 4128 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 4129 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 4130 return false; 4131} 4132 4133/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 4134/// ObjCQualifiedIDType. 4135bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4136 bool compare) { 4137 // Allow id<P..> and an 'id' or void* type in all cases. 4138 if (lhs->isVoidPointerType() || 4139 lhs->isObjCIdType() || lhs->isObjCClassType()) 4140 return true; 4141 else if (rhs->isVoidPointerType() || 4142 rhs->isObjCIdType() || rhs->isObjCClassType()) 4143 return true; 4144 4145 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4146 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4147 4148 if (!rhsOPT) return false; 4149 4150 if (rhsOPT->qual_empty()) { 4151 // If the RHS is a unqualified interface pointer "NSString*", 4152 // make sure we check the class hierarchy. 4153 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4154 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4155 E = lhsQID->qual_end(); I != E; ++I) { 4156 // when comparing an id<P> on lhs with a static type on rhs, 4157 // see if static class implements all of id's protocols, directly or 4158 // through its super class and categories. 4159 if (!rhsID->ClassImplementsProtocol(*I, true)) 4160 return false; 4161 } 4162 } 4163 // If there are no qualifiers and no interface, we have an 'id'. 4164 return true; 4165 } 4166 // Both the right and left sides have qualifiers. 4167 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4168 E = lhsQID->qual_end(); I != E; ++I) { 4169 ObjCProtocolDecl *lhsProto = *I; 4170 bool match = false; 4171 4172 // when comparing an id<P> on lhs with a static type on rhs, 4173 // see if static class implements all of id's protocols, directly or 4174 // through its super class and categories. 4175 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4176 E = rhsOPT->qual_end(); J != E; ++J) { 4177 ObjCProtocolDecl *rhsProto = *J; 4178 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4179 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4180 match = true; 4181 break; 4182 } 4183 } 4184 // If the RHS is a qualified interface pointer "NSString<P>*", 4185 // make sure we check the class hierarchy. 4186 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4187 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4188 E = lhsQID->qual_end(); I != E; ++I) { 4189 // when comparing an id<P> on lhs with a static type on rhs, 4190 // see if static class implements all of id's protocols, directly or 4191 // through its super class and categories. 4192 if (rhsID->ClassImplementsProtocol(*I, true)) { 4193 match = true; 4194 break; 4195 } 4196 } 4197 } 4198 if (!match) 4199 return false; 4200 } 4201 4202 return true; 4203 } 4204 4205 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4206 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4207 4208 if (const ObjCObjectPointerType *lhsOPT = 4209 lhs->getAsObjCInterfacePointerType()) { 4210 if (lhsOPT->qual_empty()) { 4211 bool match = false; 4212 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4213 for (ObjCObjectPointerType::qual_iterator I = rhsQID->qual_begin(), 4214 E = rhsQID->qual_end(); I != E; ++I) { 4215 // when comparing an id<P> on lhs with a static type on rhs, 4216 // see if static class implements all of id's protocols, directly or 4217 // through its super class and categories. 4218 if (lhsID->ClassImplementsProtocol(*I, true)) { 4219 match = true; 4220 break; 4221 } 4222 } 4223 if (!match) 4224 return false; 4225 } 4226 return true; 4227 } 4228 // Both the right and left sides have qualifiers. 4229 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4230 E = lhsOPT->qual_end(); I != E; ++I) { 4231 ObjCProtocolDecl *lhsProto = *I; 4232 bool match = false; 4233 4234 // when comparing an id<P> on lhs with a static type on rhs, 4235 // see if static class implements all of id's protocols, directly or 4236 // through its super class and categories. 4237 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4238 E = rhsQID->qual_end(); J != E; ++J) { 4239 ObjCProtocolDecl *rhsProto = *J; 4240 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4241 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4242 match = true; 4243 break; 4244 } 4245 } 4246 if (!match) 4247 return false; 4248 } 4249 return true; 4250 } 4251 return false; 4252} 4253 4254/// canAssignObjCInterfaces - Return true if the two interface types are 4255/// compatible for assignment from RHS to LHS. This handles validation of any 4256/// protocol qualifiers on the LHS or RHS. 4257/// 4258bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4259 const ObjCObjectPointerType *RHSOPT) { 4260 // If either type represents the built-in 'id' or 'Class' types, return true. 4261 if (LHSOPT->isObjCBuiltinType() || RHSOPT->isObjCBuiltinType()) 4262 return true; 4263 4264 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4265 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4266 QualType(RHSOPT,0), 4267 false); 4268 4269 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4270 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4271 if (LHS && RHS) // We have 2 user-defined types. 4272 return canAssignObjCInterfaces(LHS, RHS); 4273 4274 return false; 4275} 4276 4277/// getIntersectionOfProtocols - This routine finds the intersection of set 4278/// of protocols inherited from two distinct objective-c pointer objects. 4279/// It is used to build composite qualifier list of the composite type of 4280/// the conditional expression involving two objective-c pointer objects. 4281static 4282void getIntersectionOfProtocols(ASTContext &Context, 4283 const ObjCObjectPointerType *LHSOPT, 4284 const ObjCObjectPointerType *RHSOPT, 4285 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4286 4287 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4288 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4289 4290 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4291 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4292 if (LHSNumProtocols > 0) 4293 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4294 else { 4295 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4296 Context.CollectInheritedProtocols(LHS->getDecl(), LHSInheritedProtocols); 4297 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4298 LHSInheritedProtocols.end()); 4299 } 4300 4301 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4302 if (RHSNumProtocols > 0) { 4303 ObjCProtocolDecl **RHSProtocols = (ObjCProtocolDecl **)RHS->qual_begin(); 4304 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4305 if (InheritedProtocolSet.count(RHSProtocols[i])) 4306 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4307 } 4308 else { 4309 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4310 Context.CollectInheritedProtocols(RHS->getDecl(), RHSInheritedProtocols); 4311 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4312 RHSInheritedProtocols.begin(), 4313 E = RHSInheritedProtocols.end(); I != E; ++I) 4314 if (InheritedProtocolSet.count((*I))) 4315 IntersectionOfProtocols.push_back((*I)); 4316 } 4317} 4318 4319/// areCommonBaseCompatible - Returns common base class of the two classes if 4320/// one found. Note that this is O'2 algorithm. But it will be called as the 4321/// last type comparison in a ?-exp of ObjC pointer types before a 4322/// warning is issued. So, its invokation is extremely rare. 4323QualType ASTContext::areCommonBaseCompatible( 4324 const ObjCObjectPointerType *LHSOPT, 4325 const ObjCObjectPointerType *RHSOPT) { 4326 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4327 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4328 if (!LHS || !RHS) 4329 return QualType(); 4330 4331 while (const ObjCInterfaceDecl *LHSIDecl = LHS->getDecl()->getSuperClass()) { 4332 QualType LHSTy = getObjCInterfaceType(LHSIDecl); 4333 LHS = LHSTy->getAs<ObjCInterfaceType>(); 4334 if (canAssignObjCInterfaces(LHS, RHS)) { 4335 llvm::SmallVector<ObjCProtocolDecl *, 8> IntersectionOfProtocols; 4336 getIntersectionOfProtocols(*this, 4337 LHSOPT, RHSOPT, IntersectionOfProtocols); 4338 if (IntersectionOfProtocols.empty()) 4339 LHSTy = getObjCObjectPointerType(LHSTy); 4340 else 4341 LHSTy = getObjCObjectPointerType(LHSTy, &IntersectionOfProtocols[0], 4342 IntersectionOfProtocols.size()); 4343 return LHSTy; 4344 } 4345 } 4346 4347 return QualType(); 4348} 4349 4350bool ASTContext::canAssignObjCInterfaces(const ObjCInterfaceType *LHS, 4351 const ObjCInterfaceType *RHS) { 4352 // Verify that the base decls are compatible: the RHS must be a subclass of 4353 // the LHS. 4354 if (!LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4355 return false; 4356 4357 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4358 // protocol qualified at all, then we are good. 4359 if (LHS->getNumProtocols() == 0) 4360 return true; 4361 4362 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4363 // isn't a superset. 4364 if (RHS->getNumProtocols() == 0) 4365 return true; // FIXME: should return false! 4366 4367 for (ObjCInterfaceType::qual_iterator LHSPI = LHS->qual_begin(), 4368 LHSPE = LHS->qual_end(); 4369 LHSPI != LHSPE; LHSPI++) { 4370 bool RHSImplementsProtocol = false; 4371 4372 // If the RHS doesn't implement the protocol on the left, the types 4373 // are incompatible. 4374 for (ObjCInterfaceType::qual_iterator RHSPI = RHS->qual_begin(), 4375 RHSPE = RHS->qual_end(); 4376 RHSPI != RHSPE; RHSPI++) { 4377 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4378 RHSImplementsProtocol = true; 4379 break; 4380 } 4381 } 4382 // FIXME: For better diagnostics, consider passing back the protocol name. 4383 if (!RHSImplementsProtocol) 4384 return false; 4385 } 4386 // The RHS implements all protocols listed on the LHS. 4387 return true; 4388} 4389 4390bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4391 // get the "pointed to" types 4392 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4393 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4394 4395 if (!LHSOPT || !RHSOPT) 4396 return false; 4397 4398 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4399 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4400} 4401 4402/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4403/// both shall have the identically qualified version of a compatible type. 4404/// C99 6.2.7p1: Two types have compatible types if their types are the 4405/// same. See 6.7.[2,3,5] for additional rules. 4406bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 4407 if (getLangOptions().CPlusPlus) 4408 return hasSameType(LHS, RHS); 4409 4410 return !mergeTypes(LHS, RHS).isNull(); 4411} 4412 4413QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs) { 4414 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4415 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4416 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4417 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4418 bool allLTypes = true; 4419 bool allRTypes = true; 4420 4421 // Check return type 4422 QualType retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 4423 if (retType.isNull()) return QualType(); 4424 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 4425 allLTypes = false; 4426 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 4427 allRTypes = false; 4428 // FIXME: double check this 4429 bool NoReturn = lbase->getNoReturnAttr() || rbase->getNoReturnAttr(); 4430 if (NoReturn != lbase->getNoReturnAttr()) 4431 allLTypes = false; 4432 if (NoReturn != rbase->getNoReturnAttr()) 4433 allRTypes = false; 4434 CallingConv lcc = lbase->getCallConv(); 4435 CallingConv rcc = rbase->getCallConv(); 4436 // Compatible functions must have compatible calling conventions 4437 if (!isSameCallConv(lcc, rcc)) 4438 return QualType(); 4439 4440 if (lproto && rproto) { // two C99 style function prototypes 4441 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4442 "C++ shouldn't be here"); 4443 unsigned lproto_nargs = lproto->getNumArgs(); 4444 unsigned rproto_nargs = rproto->getNumArgs(); 4445 4446 // Compatible functions must have the same number of arguments 4447 if (lproto_nargs != rproto_nargs) 4448 return QualType(); 4449 4450 // Variadic and non-variadic functions aren't compatible 4451 if (lproto->isVariadic() != rproto->isVariadic()) 4452 return QualType(); 4453 4454 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4455 return QualType(); 4456 4457 // Check argument compatibility 4458 llvm::SmallVector<QualType, 10> types; 4459 for (unsigned i = 0; i < lproto_nargs; i++) { 4460 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4461 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4462 QualType argtype = mergeTypes(largtype, rargtype); 4463 if (argtype.isNull()) return QualType(); 4464 types.push_back(argtype); 4465 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4466 allLTypes = false; 4467 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4468 allRTypes = false; 4469 } 4470 if (allLTypes) return lhs; 4471 if (allRTypes) return rhs; 4472 return getFunctionType(retType, types.begin(), types.size(), 4473 lproto->isVariadic(), lproto->getTypeQuals(), 4474 false, false, 0, 0, NoReturn, lcc); 4475 } 4476 4477 if (lproto) allRTypes = false; 4478 if (rproto) allLTypes = false; 4479 4480 const FunctionProtoType *proto = lproto ? lproto : rproto; 4481 if (proto) { 4482 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4483 if (proto->isVariadic()) return QualType(); 4484 // Check that the types are compatible with the types that 4485 // would result from default argument promotions (C99 6.7.5.3p15). 4486 // The only types actually affected are promotable integer 4487 // types and floats, which would be passed as a different 4488 // type depending on whether the prototype is visible. 4489 unsigned proto_nargs = proto->getNumArgs(); 4490 for (unsigned i = 0; i < proto_nargs; ++i) { 4491 QualType argTy = proto->getArgType(i); 4492 4493 // Look at the promotion type of enum types, since that is the type used 4494 // to pass enum values. 4495 if (const EnumType *Enum = argTy->getAs<EnumType>()) 4496 argTy = Enum->getDecl()->getPromotionType(); 4497 4498 if (argTy->isPromotableIntegerType() || 4499 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4500 return QualType(); 4501 } 4502 4503 if (allLTypes) return lhs; 4504 if (allRTypes) return rhs; 4505 return getFunctionType(retType, proto->arg_type_begin(), 4506 proto->getNumArgs(), proto->isVariadic(), 4507 proto->getTypeQuals(), 4508 false, false, 0, 0, NoReturn, lcc); 4509 } 4510 4511 if (allLTypes) return lhs; 4512 if (allRTypes) return rhs; 4513 return getFunctionNoProtoType(retType, NoReturn, lcc); 4514} 4515 4516QualType ASTContext::mergeTypes(QualType LHS, QualType RHS) { 4517 // C++ [expr]: If an expression initially has the type "reference to T", the 4518 // type is adjusted to "T" prior to any further analysis, the expression 4519 // designates the object or function denoted by the reference, and the 4520 // expression is an lvalue unless the reference is an rvalue reference and 4521 // the expression is a function call (possibly inside parentheses). 4522 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 4523 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 4524 4525 QualType LHSCan = getCanonicalType(LHS), 4526 RHSCan = getCanonicalType(RHS); 4527 4528 // If two types are identical, they are compatible. 4529 if (LHSCan == RHSCan) 4530 return LHS; 4531 4532 // If the qualifiers are different, the types aren't compatible... mostly. 4533 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4534 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4535 if (LQuals != RQuals) { 4536 // If any of these qualifiers are different, we have a type 4537 // mismatch. 4538 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4539 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4540 return QualType(); 4541 4542 // Exactly one GC qualifier difference is allowed: __strong is 4543 // okay if the other type has no GC qualifier but is an Objective 4544 // C object pointer (i.e. implicitly strong by default). We fix 4545 // this by pretending that the unqualified type was actually 4546 // qualified __strong. 4547 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4548 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4549 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4550 4551 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4552 return QualType(); 4553 4554 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4555 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4556 } 4557 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4558 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4559 } 4560 return QualType(); 4561 } 4562 4563 // Okay, qualifiers are equal. 4564 4565 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4566 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4567 4568 // We want to consider the two function types to be the same for these 4569 // comparisons, just force one to the other. 4570 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 4571 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 4572 4573 // Same as above for arrays 4574 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 4575 LHSClass = Type::ConstantArray; 4576 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 4577 RHSClass = Type::ConstantArray; 4578 4579 // Canonicalize ExtVector -> Vector. 4580 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 4581 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 4582 4583 // If the canonical type classes don't match. 4584 if (LHSClass != RHSClass) { 4585 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 4586 // a signed integer type, or an unsigned integer type. 4587 // Compatibility is based on the underlying type, not the promotion 4588 // type. 4589 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 4590 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 4591 return RHS; 4592 } 4593 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 4594 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 4595 return LHS; 4596 } 4597 4598 return QualType(); 4599 } 4600 4601 // The canonical type classes match. 4602 switch (LHSClass) { 4603#define TYPE(Class, Base) 4604#define ABSTRACT_TYPE(Class, Base) 4605#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 4606#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4607#define DEPENDENT_TYPE(Class, Base) case Type::Class: 4608#include "clang/AST/TypeNodes.def" 4609 assert(false && "Non-canonical and dependent types shouldn't get here"); 4610 return QualType(); 4611 4612 case Type::LValueReference: 4613 case Type::RValueReference: 4614 case Type::MemberPointer: 4615 assert(false && "C++ should never be in mergeTypes"); 4616 return QualType(); 4617 4618 case Type::IncompleteArray: 4619 case Type::VariableArray: 4620 case Type::FunctionProto: 4621 case Type::ExtVector: 4622 assert(false && "Types are eliminated above"); 4623 return QualType(); 4624 4625 case Type::Pointer: 4626 { 4627 // Merge two pointer types, while trying to preserve typedef info 4628 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 4629 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 4630 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 4631 if (ResultType.isNull()) return QualType(); 4632 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4633 return LHS; 4634 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4635 return RHS; 4636 return getPointerType(ResultType); 4637 } 4638 case Type::BlockPointer: 4639 { 4640 // Merge two block pointer types, while trying to preserve typedef info 4641 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 4642 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 4643 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 4644 if (ResultType.isNull()) return QualType(); 4645 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4646 return LHS; 4647 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4648 return RHS; 4649 return getBlockPointerType(ResultType); 4650 } 4651 case Type::ConstantArray: 4652 { 4653 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 4654 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 4655 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 4656 return QualType(); 4657 4658 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 4659 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 4660 QualType ResultType = mergeTypes(LHSElem, RHSElem); 4661 if (ResultType.isNull()) return QualType(); 4662 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4663 return LHS; 4664 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4665 return RHS; 4666 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 4667 ArrayType::ArraySizeModifier(), 0); 4668 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 4669 ArrayType::ArraySizeModifier(), 0); 4670 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 4671 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 4672 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4673 return LHS; 4674 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4675 return RHS; 4676 if (LVAT) { 4677 // FIXME: This isn't correct! But tricky to implement because 4678 // the array's size has to be the size of LHS, but the type 4679 // has to be different. 4680 return LHS; 4681 } 4682 if (RVAT) { 4683 // FIXME: This isn't correct! But tricky to implement because 4684 // the array's size has to be the size of RHS, but the type 4685 // has to be different. 4686 return RHS; 4687 } 4688 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 4689 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 4690 return getIncompleteArrayType(ResultType, 4691 ArrayType::ArraySizeModifier(), 0); 4692 } 4693 case Type::FunctionNoProto: 4694 return mergeFunctionTypes(LHS, RHS); 4695 case Type::Record: 4696 case Type::Enum: 4697 return QualType(); 4698 case Type::Builtin: 4699 // Only exactly equal builtin types are compatible, which is tested above. 4700 return QualType(); 4701 case Type::Complex: 4702 // Distinct complex types are incompatible. 4703 return QualType(); 4704 case Type::Vector: 4705 // FIXME: The merged type should be an ExtVector! 4706 if (areCompatVectorTypes(LHS->getAs<VectorType>(), RHS->getAs<VectorType>())) 4707 return LHS; 4708 return QualType(); 4709 case Type::ObjCInterface: { 4710 // Check if the interfaces are assignment compatible. 4711 // FIXME: This should be type compatibility, e.g. whether 4712 // "LHS x; RHS x;" at global scope is legal. 4713 const ObjCInterfaceType* LHSIface = LHS->getAs<ObjCInterfaceType>(); 4714 const ObjCInterfaceType* RHSIface = RHS->getAs<ObjCInterfaceType>(); 4715 if (LHSIface && RHSIface && 4716 canAssignObjCInterfaces(LHSIface, RHSIface)) 4717 return LHS; 4718 4719 return QualType(); 4720 } 4721 case Type::ObjCObjectPointer: { 4722 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 4723 RHS->getAs<ObjCObjectPointerType>())) 4724 return LHS; 4725 4726 return QualType(); 4727 } 4728 } 4729 4730 return QualType(); 4731} 4732 4733//===----------------------------------------------------------------------===// 4734// Integer Predicates 4735//===----------------------------------------------------------------------===// 4736 4737unsigned ASTContext::getIntWidth(QualType T) { 4738 if (T->isBooleanType()) 4739 return 1; 4740 if (EnumType *ET = dyn_cast<EnumType>(T)) 4741 T = ET->getDecl()->getIntegerType(); 4742 // For builtin types, just use the standard type sizing method 4743 return (unsigned)getTypeSize(T); 4744} 4745 4746QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 4747 assert(T->isSignedIntegerType() && "Unexpected type"); 4748 4749 // Turn <4 x signed int> -> <4 x unsigned int> 4750 if (const VectorType *VTy = T->getAs<VectorType>()) 4751 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 4752 VTy->getNumElements(), VTy->isAltiVec(), VTy->isPixel()); 4753 4754 // For enums, we return the unsigned version of the base type. 4755 if (const EnumType *ETy = T->getAs<EnumType>()) 4756 T = ETy->getDecl()->getIntegerType(); 4757 4758 const BuiltinType *BTy = T->getAs<BuiltinType>(); 4759 assert(BTy && "Unexpected signed integer type"); 4760 switch (BTy->getKind()) { 4761 case BuiltinType::Char_S: 4762 case BuiltinType::SChar: 4763 return UnsignedCharTy; 4764 case BuiltinType::Short: 4765 return UnsignedShortTy; 4766 case BuiltinType::Int: 4767 return UnsignedIntTy; 4768 case BuiltinType::Long: 4769 return UnsignedLongTy; 4770 case BuiltinType::LongLong: 4771 return UnsignedLongLongTy; 4772 case BuiltinType::Int128: 4773 return UnsignedInt128Ty; 4774 default: 4775 assert(0 && "Unexpected signed integer type"); 4776 return QualType(); 4777 } 4778} 4779 4780ExternalASTSource::~ExternalASTSource() { } 4781 4782void ExternalASTSource::PrintStats() { } 4783 4784 4785//===----------------------------------------------------------------------===// 4786// Builtin Type Computation 4787//===----------------------------------------------------------------------===// 4788 4789/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 4790/// pointer over the consumed characters. This returns the resultant type. 4791static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 4792 ASTContext::GetBuiltinTypeError &Error, 4793 bool AllowTypeModifiers = true) { 4794 // Modifiers. 4795 int HowLong = 0; 4796 bool Signed = false, Unsigned = false; 4797 4798 // Read the modifiers first. 4799 bool Done = false; 4800 while (!Done) { 4801 switch (*Str++) { 4802 default: Done = true; --Str; break; 4803 case 'S': 4804 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 4805 assert(!Signed && "Can't use 'S' modifier multiple times!"); 4806 Signed = true; 4807 break; 4808 case 'U': 4809 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 4810 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 4811 Unsigned = true; 4812 break; 4813 case 'L': 4814 assert(HowLong <= 2 && "Can't have LLLL modifier"); 4815 ++HowLong; 4816 break; 4817 } 4818 } 4819 4820 QualType Type; 4821 4822 // Read the base type. 4823 switch (*Str++) { 4824 default: assert(0 && "Unknown builtin type letter!"); 4825 case 'v': 4826 assert(HowLong == 0 && !Signed && !Unsigned && 4827 "Bad modifiers used with 'v'!"); 4828 Type = Context.VoidTy; 4829 break; 4830 case 'f': 4831 assert(HowLong == 0 && !Signed && !Unsigned && 4832 "Bad modifiers used with 'f'!"); 4833 Type = Context.FloatTy; 4834 break; 4835 case 'd': 4836 assert(HowLong < 2 && !Signed && !Unsigned && 4837 "Bad modifiers used with 'd'!"); 4838 if (HowLong) 4839 Type = Context.LongDoubleTy; 4840 else 4841 Type = Context.DoubleTy; 4842 break; 4843 case 's': 4844 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 4845 if (Unsigned) 4846 Type = Context.UnsignedShortTy; 4847 else 4848 Type = Context.ShortTy; 4849 break; 4850 case 'i': 4851 if (HowLong == 3) 4852 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 4853 else if (HowLong == 2) 4854 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 4855 else if (HowLong == 1) 4856 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 4857 else 4858 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 4859 break; 4860 case 'c': 4861 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 4862 if (Signed) 4863 Type = Context.SignedCharTy; 4864 else if (Unsigned) 4865 Type = Context.UnsignedCharTy; 4866 else 4867 Type = Context.CharTy; 4868 break; 4869 case 'b': // boolean 4870 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 4871 Type = Context.BoolTy; 4872 break; 4873 case 'z': // size_t. 4874 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 4875 Type = Context.getSizeType(); 4876 break; 4877 case 'F': 4878 Type = Context.getCFConstantStringType(); 4879 break; 4880 case 'a': 4881 Type = Context.getBuiltinVaListType(); 4882 assert(!Type.isNull() && "builtin va list type not initialized!"); 4883 break; 4884 case 'A': 4885 // This is a "reference" to a va_list; however, what exactly 4886 // this means depends on how va_list is defined. There are two 4887 // different kinds of va_list: ones passed by value, and ones 4888 // passed by reference. An example of a by-value va_list is 4889 // x86, where va_list is a char*. An example of by-ref va_list 4890 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 4891 // we want this argument to be a char*&; for x86-64, we want 4892 // it to be a __va_list_tag*. 4893 Type = Context.getBuiltinVaListType(); 4894 assert(!Type.isNull() && "builtin va list type not initialized!"); 4895 if (Type->isArrayType()) { 4896 Type = Context.getArrayDecayedType(Type); 4897 } else { 4898 Type = Context.getLValueReferenceType(Type); 4899 } 4900 break; 4901 case 'V': { 4902 char *End; 4903 unsigned NumElements = strtoul(Str, &End, 10); 4904 assert(End != Str && "Missing vector size"); 4905 4906 Str = End; 4907 4908 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4909 // FIXME: Don't know what to do about AltiVec. 4910 Type = Context.getVectorType(ElementType, NumElements, false, false); 4911 break; 4912 } 4913 case 'X': { 4914 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4915 Type = Context.getComplexType(ElementType); 4916 break; 4917 } 4918 case 'P': 4919 Type = Context.getFILEType(); 4920 if (Type.isNull()) { 4921 Error = ASTContext::GE_Missing_stdio; 4922 return QualType(); 4923 } 4924 break; 4925 case 'J': 4926 if (Signed) 4927 Type = Context.getsigjmp_bufType(); 4928 else 4929 Type = Context.getjmp_bufType(); 4930 4931 if (Type.isNull()) { 4932 Error = ASTContext::GE_Missing_setjmp; 4933 return QualType(); 4934 } 4935 break; 4936 } 4937 4938 if (!AllowTypeModifiers) 4939 return Type; 4940 4941 Done = false; 4942 while (!Done) { 4943 switch (*Str++) { 4944 default: Done = true; --Str; break; 4945 case '*': 4946 Type = Context.getPointerType(Type); 4947 break; 4948 case '&': 4949 Type = Context.getLValueReferenceType(Type); 4950 break; 4951 // FIXME: There's no way to have a built-in with an rvalue ref arg. 4952 case 'C': 4953 Type = Type.withConst(); 4954 break; 4955 case 'D': 4956 Type = Context.getVolatileType(Type); 4957 break; 4958 } 4959 } 4960 4961 return Type; 4962} 4963 4964/// GetBuiltinType - Return the type for the specified builtin. 4965QualType ASTContext::GetBuiltinType(unsigned id, 4966 GetBuiltinTypeError &Error) { 4967 const char *TypeStr = BuiltinInfo.GetTypeString(id); 4968 4969 llvm::SmallVector<QualType, 8> ArgTypes; 4970 4971 Error = GE_None; 4972 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 4973 if (Error != GE_None) 4974 return QualType(); 4975 while (TypeStr[0] && TypeStr[0] != '.') { 4976 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 4977 if (Error != GE_None) 4978 return QualType(); 4979 4980 // Do array -> pointer decay. The builtin should use the decayed type. 4981 if (Ty->isArrayType()) 4982 Ty = getArrayDecayedType(Ty); 4983 4984 ArgTypes.push_back(Ty); 4985 } 4986 4987 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 4988 "'.' should only occur at end of builtin type list!"); 4989 4990 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 4991 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 4992 return getFunctionNoProtoType(ResType); 4993 4994 // FIXME: Should we create noreturn types? 4995 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 4996 TypeStr[0] == '.', 0, false, false, 0, 0, 4997 false, CC_Default); 4998} 4999 5000QualType 5001ASTContext::UsualArithmeticConversionsType(QualType lhs, QualType rhs) { 5002 // Perform the usual unary conversions. We do this early so that 5003 // integral promotions to "int" can allow us to exit early, in the 5004 // lhs == rhs check. Also, for conversion purposes, we ignore any 5005 // qualifiers. For example, "const float" and "float" are 5006 // equivalent. 5007 if (lhs->isPromotableIntegerType()) 5008 lhs = getPromotedIntegerType(lhs); 5009 else 5010 lhs = lhs.getUnqualifiedType(); 5011 if (rhs->isPromotableIntegerType()) 5012 rhs = getPromotedIntegerType(rhs); 5013 else 5014 rhs = rhs.getUnqualifiedType(); 5015 5016 // If both types are identical, no conversion is needed. 5017 if (lhs == rhs) 5018 return lhs; 5019 5020 // If either side is a non-arithmetic type (e.g. a pointer), we are done. 5021 // The caller can deal with this (e.g. pointer + int). 5022 if (!lhs->isArithmeticType() || !rhs->isArithmeticType()) 5023 return lhs; 5024 5025 // At this point, we have two different arithmetic types. 5026 5027 // Handle complex types first (C99 6.3.1.8p1). 5028 if (lhs->isComplexType() || rhs->isComplexType()) { 5029 // if we have an integer operand, the result is the complex type. 5030 if (rhs->isIntegerType() || rhs->isComplexIntegerType()) { 5031 // convert the rhs to the lhs complex type. 5032 return lhs; 5033 } 5034 if (lhs->isIntegerType() || lhs->isComplexIntegerType()) { 5035 // convert the lhs to the rhs complex type. 5036 return rhs; 5037 } 5038 // This handles complex/complex, complex/float, or float/complex. 5039 // When both operands are complex, the shorter operand is converted to the 5040 // type of the longer, and that is the type of the result. This corresponds 5041 // to what is done when combining two real floating-point operands. 5042 // The fun begins when size promotion occur across type domains. 5043 // From H&S 6.3.4: When one operand is complex and the other is a real 5044 // floating-point type, the less precise type is converted, within it's 5045 // real or complex domain, to the precision of the other type. For example, 5046 // when combining a "long double" with a "double _Complex", the 5047 // "double _Complex" is promoted to "long double _Complex". 5048 int result = getFloatingTypeOrder(lhs, rhs); 5049 5050 if (result > 0) { // The left side is bigger, convert rhs. 5051 rhs = getFloatingTypeOfSizeWithinDomain(lhs, rhs); 5052 } else if (result < 0) { // The right side is bigger, convert lhs. 5053 lhs = getFloatingTypeOfSizeWithinDomain(rhs, lhs); 5054 } 5055 // At this point, lhs and rhs have the same rank/size. Now, make sure the 5056 // domains match. This is a requirement for our implementation, C99 5057 // does not require this promotion. 5058 if (lhs != rhs) { // Domains don't match, we have complex/float mix. 5059 if (lhs->isRealFloatingType()) { // handle "double, _Complex double". 5060 return rhs; 5061 } else { // handle "_Complex double, double". 5062 return lhs; 5063 } 5064 } 5065 return lhs; // The domain/size match exactly. 5066 } 5067 // Now handle "real" floating types (i.e. float, double, long double). 5068 if (lhs->isRealFloatingType() || rhs->isRealFloatingType()) { 5069 // if we have an integer operand, the result is the real floating type. 5070 if (rhs->isIntegerType()) { 5071 // convert rhs to the lhs floating point type. 5072 return lhs; 5073 } 5074 if (rhs->isComplexIntegerType()) { 5075 // convert rhs to the complex floating point type. 5076 return getComplexType(lhs); 5077 } 5078 if (lhs->isIntegerType()) { 5079 // convert lhs to the rhs floating point type. 5080 return rhs; 5081 } 5082 if (lhs->isComplexIntegerType()) { 5083 // convert lhs to the complex floating point type. 5084 return getComplexType(rhs); 5085 } 5086 // We have two real floating types, float/complex combos were handled above. 5087 // Convert the smaller operand to the bigger result. 5088 int result = getFloatingTypeOrder(lhs, rhs); 5089 if (result > 0) // convert the rhs 5090 return lhs; 5091 assert(result < 0 && "illegal float comparison"); 5092 return rhs; // convert the lhs 5093 } 5094 if (lhs->isComplexIntegerType() || rhs->isComplexIntegerType()) { 5095 // Handle GCC complex int extension. 5096 const ComplexType *lhsComplexInt = lhs->getAsComplexIntegerType(); 5097 const ComplexType *rhsComplexInt = rhs->getAsComplexIntegerType(); 5098 5099 if (lhsComplexInt && rhsComplexInt) { 5100 if (getIntegerTypeOrder(lhsComplexInt->getElementType(), 5101 rhsComplexInt->getElementType()) >= 0) 5102 return lhs; // convert the rhs 5103 return rhs; 5104 } else if (lhsComplexInt && rhs->isIntegerType()) { 5105 // convert the rhs to the lhs complex type. 5106 return lhs; 5107 } else if (rhsComplexInt && lhs->isIntegerType()) { 5108 // convert the lhs to the rhs complex type. 5109 return rhs; 5110 } 5111 } 5112 // Finally, we have two differing integer types. 5113 // The rules for this case are in C99 6.3.1.8 5114 int compare = getIntegerTypeOrder(lhs, rhs); 5115 bool lhsSigned = lhs->isSignedIntegerType(), 5116 rhsSigned = rhs->isSignedIntegerType(); 5117 QualType destType; 5118 if (lhsSigned == rhsSigned) { 5119 // Same signedness; use the higher-ranked type 5120 destType = compare >= 0 ? lhs : rhs; 5121 } else if (compare != (lhsSigned ? 1 : -1)) { 5122 // The unsigned type has greater than or equal rank to the 5123 // signed type, so use the unsigned type 5124 destType = lhsSigned ? rhs : lhs; 5125 } else if (getIntWidth(lhs) != getIntWidth(rhs)) { 5126 // The two types are different widths; if we are here, that 5127 // means the signed type is larger than the unsigned type, so 5128 // use the signed type. 5129 destType = lhsSigned ? lhs : rhs; 5130 } else { 5131 // The signed type is higher-ranked than the unsigned type, 5132 // but isn't actually any bigger (like unsigned int and long 5133 // on most 32-bit systems). Use the unsigned type corresponding 5134 // to the signed type. 5135 destType = getCorrespondingUnsignedType(lhsSigned ? lhs : rhs); 5136 } 5137 return destType; 5138} 5139