1 //===--- Expr.cpp - Expression AST Node Implementation --------------------===// 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 Expr class and subclasses. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "clang/AST/APValue.h" 15 #include "clang/AST/ASTContext.h" 16 #include "clang/AST/Attr.h" 17 #include "clang/AST/DeclCXX.h" 18 #include "clang/AST/DeclObjC.h" 19 #include "clang/AST/DeclTemplate.h" 20 #include "clang/AST/EvaluatedExprVisitor.h" 21 #include "clang/AST/Expr.h" 22 #include "clang/AST/ExprCXX.h" 23 #include "clang/AST/RecordLayout.h" 24 #include "clang/AST/StmtVisitor.h" 25 #include "clang/Basic/Builtins.h" 26 #include "clang/Basic/CharInfo.h" 27 #include "clang/Basic/SourceManager.h" 28 #include "clang/Basic/TargetInfo.h" 29 #include "clang/Lex/Lexer.h" 30 #include "clang/Lex/LiteralSupport.h" 31 #include "clang/Sema/SemaDiagnostic.h" 32 #include "llvm/Support/ErrorHandling.h" 33 #include "llvm/Support/raw_ostream.h" 34 #include <algorithm> 35 #include <cstring> 36 using namespace clang; 37 38 const CXXRecordDecl *Expr::getBestDynamicClassType() const { 39 const Expr *E = ignoreParenBaseCasts(); 40 41 QualType DerivedType = E->getType(); 42 if (const PointerType *PTy = DerivedType->getAs<PointerType>()) 43 DerivedType = PTy->getPointeeType(); 44 45 if (DerivedType->isDependentType()) 46 return NULL; 47 48 const RecordType *Ty = DerivedType->castAs<RecordType>(); 49 Decl *D = Ty->getDecl(); 50 return cast<CXXRecordDecl>(D); 51 } 52 53 const Expr * 54 Expr::skipRValueSubobjectAdjustments( 55 SmallVectorImpl<SubobjectAdjustment> &Adjustments) const { 56 const Expr *E = this; 57 while (true) { 58 E = E->IgnoreParens(); 59 60 if (const CastExpr *CE = dyn_cast<CastExpr>(E)) { 61 if ((CE->getCastKind() == CK_DerivedToBase || 62 CE->getCastKind() == CK_UncheckedDerivedToBase) && 63 E->getType()->isRecordType()) { 64 E = CE->getSubExpr(); 65 CXXRecordDecl *Derived 66 = cast<CXXRecordDecl>(E->getType()->getAs<RecordType>()->getDecl()); 67 Adjustments.push_back(SubobjectAdjustment(CE, Derived)); 68 continue; 69 } 70 71 if (CE->getCastKind() == CK_NoOp) { 72 E = CE->getSubExpr(); 73 continue; 74 } 75 } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) { 76 if (!ME->isArrow() && ME->getBase()->isRValue()) { 77 assert(ME->getBase()->getType()->isRecordType()); 78 if (FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl())) { 79 E = ME->getBase(); 80 Adjustments.push_back(SubobjectAdjustment(Field)); 81 continue; 82 } 83 } 84 } else if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) { 85 if (BO->isPtrMemOp()) { 86 assert(BO->getRHS()->isRValue()); 87 E = BO->getLHS(); 88 const MemberPointerType *MPT = 89 BO->getRHS()->getType()->getAs<MemberPointerType>(); 90 Adjustments.push_back(SubobjectAdjustment(MPT, BO->getRHS())); 91 } 92 } 93 94 // Nothing changed. 95 break; 96 } 97 return E; 98 } 99 100 const Expr * 101 Expr::findMaterializedTemporary(const MaterializeTemporaryExpr *&MTE) const { 102 const Expr *E = this; 103 // Look through single-element init lists that claim to be lvalues. They're 104 // just syntactic wrappers in this case. 105 if (const InitListExpr *ILE = dyn_cast<InitListExpr>(E)) { 106 if (ILE->getNumInits() == 1 && ILE->isGLValue()) 107 E = ILE->getInit(0); 108 } 109 110 // Look through expressions for materialized temporaries (for now). 111 if (const MaterializeTemporaryExpr *M 112 = dyn_cast<MaterializeTemporaryExpr>(E)) { 113 MTE = M; 114 E = M->GetTemporaryExpr(); 115 } 116 117 if (const CXXDefaultArgExpr *DAE = dyn_cast<CXXDefaultArgExpr>(E)) 118 E = DAE->getExpr(); 119 return E; 120 } 121 122 /// isKnownToHaveBooleanValue - Return true if this is an integer expression 123 /// that is known to return 0 or 1. This happens for _Bool/bool expressions 124 /// but also int expressions which are produced by things like comparisons in 125 /// C. 126 bool Expr::isKnownToHaveBooleanValue() const { 127 const Expr *E = IgnoreParens(); 128 129 // If this value has _Bool type, it is obvious 0/1. 130 if (E->getType()->isBooleanType()) return true; 131 // If this is a non-scalar-integer type, we don't care enough to try. 132 if (!E->getType()->isIntegralOrEnumerationType()) return false; 133 134 if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) { 135 switch (UO->getOpcode()) { 136 case UO_Plus: 137 return UO->getSubExpr()->isKnownToHaveBooleanValue(); 138 default: 139 return false; 140 } 141 } 142 143 // Only look through implicit casts. If the user writes 144 // '(int) (a && b)' treat it as an arbitrary int. 145 if (const ImplicitCastExpr *CE = dyn_cast<ImplicitCastExpr>(E)) 146 return CE->getSubExpr()->isKnownToHaveBooleanValue(); 147 148 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) { 149 switch (BO->getOpcode()) { 150 default: return false; 151 case BO_LT: // Relational operators. 152 case BO_GT: 153 case BO_LE: 154 case BO_GE: 155 case BO_EQ: // Equality operators. 156 case BO_NE: 157 case BO_LAnd: // AND operator. 158 case BO_LOr: // Logical OR operator. 159 return true; 160 161 case BO_And: // Bitwise AND operator. 162 case BO_Xor: // Bitwise XOR operator. 163 case BO_Or: // Bitwise OR operator. 164 // Handle things like (x==2)|(y==12). 165 return BO->getLHS()->isKnownToHaveBooleanValue() && 166 BO->getRHS()->isKnownToHaveBooleanValue(); 167 168 case BO_Comma: 169 case BO_Assign: 170 return BO->getRHS()->isKnownToHaveBooleanValue(); 171 } 172 } 173 174 if (const ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E)) 175 return CO->getTrueExpr()->isKnownToHaveBooleanValue() && 176 CO->getFalseExpr()->isKnownToHaveBooleanValue(); 177 178 return false; 179 } 180 181 // Amusing macro metaprogramming hack: check whether a class provides 182 // a more specific implementation of getExprLoc(). 183 // 184 // See also Stmt.cpp:{getLocStart(),getLocEnd()}. 185 namespace { 186 /// This implementation is used when a class provides a custom 187 /// implementation of getExprLoc. 188 template <class E, class T> 189 SourceLocation getExprLocImpl(const Expr *expr, 190 SourceLocation (T::*v)() const) { 191 return static_cast<const E*>(expr)->getExprLoc(); 192 } 193 194 /// This implementation is used when a class doesn't provide 195 /// a custom implementation of getExprLoc. Overload resolution 196 /// should pick it over the implementation above because it's 197 /// more specialized according to function template partial ordering. 198 template <class E> 199 SourceLocation getExprLocImpl(const Expr *expr, 200 SourceLocation (Expr::*v)() const) { 201 return static_cast<const E*>(expr)->getLocStart(); 202 } 203 } 204 205 SourceLocation Expr::getExprLoc() const { 206 switch (getStmtClass()) { 207 case Stmt::NoStmtClass: llvm_unreachable("statement without class"); 208 #define ABSTRACT_STMT(type) 209 #define STMT(type, base) \ 210 case Stmt::type##Class: llvm_unreachable(#type " is not an Expr"); break; 211 #define EXPR(type, base) \ 212 case Stmt::type##Class: return getExprLocImpl<type>(this, &type::getExprLoc); 213 #include "clang/AST/StmtNodes.inc" 214 } 215 llvm_unreachable("unknown statement kind"); 216 } 217 218 //===----------------------------------------------------------------------===// 219 // Primary Expressions. 220 //===----------------------------------------------------------------------===// 221 222 /// \brief Compute the type-, value-, and instantiation-dependence of a 223 /// declaration reference 224 /// based on the declaration being referenced. 225 static void computeDeclRefDependence(ASTContext &Ctx, NamedDecl *D, QualType T, 226 bool &TypeDependent, 227 bool &ValueDependent, 228 bool &InstantiationDependent) { 229 TypeDependent = false; 230 ValueDependent = false; 231 InstantiationDependent = false; 232 233 // (TD) C++ [temp.dep.expr]p3: 234 // An id-expression is type-dependent if it contains: 235 // 236 // and 237 // 238 // (VD) C++ [temp.dep.constexpr]p2: 239 // An identifier is value-dependent if it is: 240 241 // (TD) - an identifier that was declared with dependent type 242 // (VD) - a name declared with a dependent type, 243 if (T->isDependentType()) { 244 TypeDependent = true; 245 ValueDependent = true; 246 InstantiationDependent = true; 247 return; 248 } else if (T->isInstantiationDependentType()) { 249 InstantiationDependent = true; 250 } 251 252 // (TD) - a conversion-function-id that specifies a dependent type 253 if (D->getDeclName().getNameKind() 254 == DeclarationName::CXXConversionFunctionName) { 255 QualType T = D->getDeclName().getCXXNameType(); 256 if (T->isDependentType()) { 257 TypeDependent = true; 258 ValueDependent = true; 259 InstantiationDependent = true; 260 return; 261 } 262 263 if (T->isInstantiationDependentType()) 264 InstantiationDependent = true; 265 } 266 267 // (VD) - the name of a non-type template parameter, 268 if (isa<NonTypeTemplateParmDecl>(D)) { 269 ValueDependent = true; 270 InstantiationDependent = true; 271 return; 272 } 273 274 // (VD) - a constant with integral or enumeration type and is 275 // initialized with an expression that is value-dependent. 276 // (VD) - a constant with literal type and is initialized with an 277 // expression that is value-dependent [C++11]. 278 // (VD) - FIXME: Missing from the standard: 279 // - an entity with reference type and is initialized with an 280 // expression that is value-dependent [C++11] 281 if (VarDecl *Var = dyn_cast<VarDecl>(D)) { 282 if ((Ctx.getLangOpts().CPlusPlus11 ? 283 Var->getType()->isLiteralType() : 284 Var->getType()->isIntegralOrEnumerationType()) && 285 (Var->getType().isConstQualified() || 286 Var->getType()->isReferenceType())) { 287 if (const Expr *Init = Var->getAnyInitializer()) 288 if (Init->isValueDependent()) { 289 ValueDependent = true; 290 InstantiationDependent = true; 291 } 292 } 293 294 // (VD) - FIXME: Missing from the standard: 295 // - a member function or a static data member of the current 296 // instantiation 297 if (Var->isStaticDataMember() && 298 Var->getDeclContext()->isDependentContext()) { 299 ValueDependent = true; 300 InstantiationDependent = true; 301 } 302 303 return; 304 } 305 306 // (VD) - FIXME: Missing from the standard: 307 // - a member function or a static data member of the current 308 // instantiation 309 if (isa<CXXMethodDecl>(D) && D->getDeclContext()->isDependentContext()) { 310 ValueDependent = true; 311 InstantiationDependent = true; 312 } 313 } 314 315 void DeclRefExpr::computeDependence(ASTContext &Ctx) { 316 bool TypeDependent = false; 317 bool ValueDependent = false; 318 bool InstantiationDependent = false; 319 computeDeclRefDependence(Ctx, getDecl(), getType(), TypeDependent, 320 ValueDependent, InstantiationDependent); 321 322 // (TD) C++ [temp.dep.expr]p3: 323 // An id-expression is type-dependent if it contains: 324 // 325 // and 326 // 327 // (VD) C++ [temp.dep.constexpr]p2: 328 // An identifier is value-dependent if it is: 329 if (!TypeDependent && !ValueDependent && 330 hasExplicitTemplateArgs() && 331 TemplateSpecializationType::anyDependentTemplateArguments( 332 getTemplateArgs(), 333 getNumTemplateArgs(), 334 InstantiationDependent)) { 335 TypeDependent = true; 336 ValueDependent = true; 337 InstantiationDependent = true; 338 } 339 340 ExprBits.TypeDependent = TypeDependent; 341 ExprBits.ValueDependent = ValueDependent; 342 ExprBits.InstantiationDependent = InstantiationDependent; 343 344 // Is the declaration a parameter pack? 345 if (getDecl()->isParameterPack()) 346 ExprBits.ContainsUnexpandedParameterPack = true; 347 } 348 349 DeclRefExpr::DeclRefExpr(ASTContext &Ctx, 350 NestedNameSpecifierLoc QualifierLoc, 351 SourceLocation TemplateKWLoc, 352 ValueDecl *D, bool RefersToEnclosingLocal, 353 const DeclarationNameInfo &NameInfo, 354 NamedDecl *FoundD, 355 const TemplateArgumentListInfo *TemplateArgs, 356 QualType T, ExprValueKind VK) 357 : Expr(DeclRefExprClass, T, VK, OK_Ordinary, false, false, false, false), 358 D(D), Loc(NameInfo.getLoc()), DNLoc(NameInfo.getInfo()) { 359 DeclRefExprBits.HasQualifier = QualifierLoc ? 1 : 0; 360 if (QualifierLoc) 361 getInternalQualifierLoc() = QualifierLoc; 362 DeclRefExprBits.HasFoundDecl = FoundD ? 1 : 0; 363 if (FoundD) 364 getInternalFoundDecl() = FoundD; 365 DeclRefExprBits.HasTemplateKWAndArgsInfo 366 = (TemplateArgs || TemplateKWLoc.isValid()) ? 1 : 0; 367 DeclRefExprBits.RefersToEnclosingLocal = RefersToEnclosingLocal; 368 if (TemplateArgs) { 369 bool Dependent = false; 370 bool InstantiationDependent = false; 371 bool ContainsUnexpandedParameterPack = false; 372 getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc, *TemplateArgs, 373 Dependent, 374 InstantiationDependent, 375 ContainsUnexpandedParameterPack); 376 if (InstantiationDependent) 377 setInstantiationDependent(true); 378 } else if (TemplateKWLoc.isValid()) { 379 getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc); 380 } 381 DeclRefExprBits.HadMultipleCandidates = 0; 382 383 computeDependence(Ctx); 384 } 385 386 DeclRefExpr *DeclRefExpr::Create(ASTContext &Context, 387 NestedNameSpecifierLoc QualifierLoc, 388 SourceLocation TemplateKWLoc, 389 ValueDecl *D, 390 bool RefersToEnclosingLocal, 391 SourceLocation NameLoc, 392 QualType T, 393 ExprValueKind VK, 394 NamedDecl *FoundD, 395 const TemplateArgumentListInfo *TemplateArgs) { 396 return Create(Context, QualifierLoc, TemplateKWLoc, D, 397 RefersToEnclosingLocal, 398 DeclarationNameInfo(D->getDeclName(), NameLoc), 399 T, VK, FoundD, TemplateArgs); 400 } 401 402 DeclRefExpr *DeclRefExpr::Create(ASTContext &Context, 403 NestedNameSpecifierLoc QualifierLoc, 404 SourceLocation TemplateKWLoc, 405 ValueDecl *D, 406 bool RefersToEnclosingLocal, 407 const DeclarationNameInfo &NameInfo, 408 QualType T, 409 ExprValueKind VK, 410 NamedDecl *FoundD, 411 const TemplateArgumentListInfo *TemplateArgs) { 412 // Filter out cases where the found Decl is the same as the value refenenced. 413 if (D == FoundD) 414 FoundD = 0; 415 416 std::size_t Size = sizeof(DeclRefExpr); 417 if (QualifierLoc != 0) 418 Size += sizeof(NestedNameSpecifierLoc); 419 if (FoundD) 420 Size += sizeof(NamedDecl *); 421 if (TemplateArgs) 422 Size += ASTTemplateKWAndArgsInfo::sizeFor(TemplateArgs->size()); 423 else if (TemplateKWLoc.isValid()) 424 Size += ASTTemplateKWAndArgsInfo::sizeFor(0); 425 426 void *Mem = Context.Allocate(Size, llvm::alignOf<DeclRefExpr>()); 427 return new (Mem) DeclRefExpr(Context, QualifierLoc, TemplateKWLoc, D, 428 RefersToEnclosingLocal, 429 NameInfo, FoundD, TemplateArgs, T, VK); 430 } 431 432 DeclRefExpr *DeclRefExpr::CreateEmpty(ASTContext &Context, 433 bool HasQualifier, 434 bool HasFoundDecl, 435 bool HasTemplateKWAndArgsInfo, 436 unsigned NumTemplateArgs) { 437 std::size_t Size = sizeof(DeclRefExpr); 438 if (HasQualifier) 439 Size += sizeof(NestedNameSpecifierLoc); 440 if (HasFoundDecl) 441 Size += sizeof(NamedDecl *); 442 if (HasTemplateKWAndArgsInfo) 443 Size += ASTTemplateKWAndArgsInfo::sizeFor(NumTemplateArgs); 444 445 void *Mem = Context.Allocate(Size, llvm::alignOf<DeclRefExpr>()); 446 return new (Mem) DeclRefExpr(EmptyShell()); 447 } 448 449 SourceLocation DeclRefExpr::getLocStart() const { 450 if (hasQualifier()) 451 return getQualifierLoc().getBeginLoc(); 452 return getNameInfo().getLocStart(); 453 } 454 SourceLocation DeclRefExpr::getLocEnd() const { 455 if (hasExplicitTemplateArgs()) 456 return getRAngleLoc(); 457 return getNameInfo().getLocEnd(); 458 } 459 460 // FIXME: Maybe this should use DeclPrinter with a special "print predefined 461 // expr" policy instead. 462 std::string PredefinedExpr::ComputeName(IdentType IT, const Decl *CurrentDecl) { 463 ASTContext &Context = CurrentDecl->getASTContext(); 464 465 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(CurrentDecl)) { 466 if (IT != PrettyFunction && IT != PrettyFunctionNoVirtual) 467 return FD->getNameAsString(); 468 469 SmallString<256> Name; 470 llvm::raw_svector_ostream Out(Name); 471 472 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 473 if (MD->isVirtual() && IT != PrettyFunctionNoVirtual) 474 Out << "virtual "; 475 if (MD->isStatic()) 476 Out << "static "; 477 } 478 479 PrintingPolicy Policy(Context.getLangOpts()); 480 std::string Proto; 481 llvm::raw_string_ostream POut(Proto); 482 FD->printQualifiedName(POut, Policy); 483 484 const FunctionDecl *Decl = FD; 485 if (const FunctionDecl* Pattern = FD->getTemplateInstantiationPattern()) 486 Decl = Pattern; 487 const FunctionType *AFT = Decl->getType()->getAs<FunctionType>(); 488 const FunctionProtoType *FT = 0; 489 if (FD->hasWrittenPrototype()) 490 FT = dyn_cast<FunctionProtoType>(AFT); 491 492 POut << "("; 493 if (FT) { 494 for (unsigned i = 0, e = Decl->getNumParams(); i != e; ++i) { 495 if (i) POut << ", "; 496 POut << Decl->getParamDecl(i)->getType().stream(Policy); 497 } 498 499 if (FT->isVariadic()) { 500 if (FD->getNumParams()) POut << ", "; 501 POut << "..."; 502 } 503 } 504 POut << ")"; 505 506 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 507 const FunctionType *FT = MD->getType()->castAs<FunctionType>(); 508 if (FT->isConst()) 509 POut << " const"; 510 if (FT->isVolatile()) 511 POut << " volatile"; 512 RefQualifierKind Ref = MD->getRefQualifier(); 513 if (Ref == RQ_LValue) 514 POut << " &"; 515 else if (Ref == RQ_RValue) 516 POut << " &&"; 517 } 518 519 typedef SmallVector<const ClassTemplateSpecializationDecl *, 8> SpecsTy; 520 SpecsTy Specs; 521 const DeclContext *Ctx = FD->getDeclContext(); 522 while (Ctx && isa<NamedDecl>(Ctx)) { 523 const ClassTemplateSpecializationDecl *Spec 524 = dyn_cast<ClassTemplateSpecializationDecl>(Ctx); 525 if (Spec && !Spec->isExplicitSpecialization()) 526 Specs.push_back(Spec); 527 Ctx = Ctx->getParent(); 528 } 529 530 std::string TemplateParams; 531 llvm::raw_string_ostream TOut(TemplateParams); 532 for (SpecsTy::reverse_iterator I = Specs.rbegin(), E = Specs.rend(); 533 I != E; ++I) { 534 const TemplateParameterList *Params 535 = (*I)->getSpecializedTemplate()->getTemplateParameters(); 536 const TemplateArgumentList &Args = (*I)->getTemplateArgs(); 537 assert(Params->size() == Args.size()); 538 for (unsigned i = 0, numParams = Params->size(); i != numParams; ++i) { 539 StringRef Param = Params->getParam(i)->getName(); 540 if (Param.empty()) continue; 541 TOut << Param << " = "; 542 Args.get(i).print(Policy, TOut); 543 TOut << ", "; 544 } 545 } 546 547 FunctionTemplateSpecializationInfo *FSI 548 = FD->getTemplateSpecializationInfo(); 549 if (FSI && !FSI->isExplicitSpecialization()) { 550 const TemplateParameterList* Params 551 = FSI->getTemplate()->getTemplateParameters(); 552 const TemplateArgumentList* Args = FSI->TemplateArguments; 553 assert(Params->size() == Args->size()); 554 for (unsigned i = 0, e = Params->size(); i != e; ++i) { 555 StringRef Param = Params->getParam(i)->getName(); 556 if (Param.empty()) continue; 557 TOut << Param << " = "; 558 Args->get(i).print(Policy, TOut); 559 TOut << ", "; 560 } 561 } 562 563 TOut.flush(); 564 if (!TemplateParams.empty()) { 565 // remove the trailing comma and space 566 TemplateParams.resize(TemplateParams.size() - 2); 567 POut << " [" << TemplateParams << "]"; 568 } 569 570 POut.flush(); 571 572 if (!isa<CXXConstructorDecl>(FD) && !isa<CXXDestructorDecl>(FD)) 573 AFT->getResultType().getAsStringInternal(Proto, Policy); 574 575 Out << Proto; 576 577 Out.flush(); 578 return Name.str().str(); 579 } 580 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(CurrentDecl)) { 581 SmallString<256> Name; 582 llvm::raw_svector_ostream Out(Name); 583 Out << (MD->isInstanceMethod() ? '-' : '+'); 584 Out << '['; 585 586 // For incorrect code, there might not be an ObjCInterfaceDecl. Do 587 // a null check to avoid a crash. 588 if (const ObjCInterfaceDecl *ID = MD->getClassInterface()) 589 Out << *ID; 590 591 if (const ObjCCategoryImplDecl *CID = 592 dyn_cast<ObjCCategoryImplDecl>(MD->getDeclContext())) 593 Out << '(' << *CID << ')'; 594 595 Out << ' '; 596 Out << MD->getSelector().getAsString(); 597 Out << ']'; 598 599 Out.flush(); 600 return Name.str().str(); 601 } 602 if (isa<TranslationUnitDecl>(CurrentDecl) && IT == PrettyFunction) { 603 // __PRETTY_FUNCTION__ -> "top level", the others produce an empty string. 604 return "top level"; 605 } 606 return ""; 607 } 608 609 void APNumericStorage::setIntValue(ASTContext &C, const llvm::APInt &Val) { 610 if (hasAllocation()) 611 C.Deallocate(pVal); 612 613 BitWidth = Val.getBitWidth(); 614 unsigned NumWords = Val.getNumWords(); 615 const uint64_t* Words = Val.getRawData(); 616 if (NumWords > 1) { 617 pVal = new (C) uint64_t[NumWords]; 618 std::copy(Words, Words + NumWords, pVal); 619 } else if (NumWords == 1) 620 VAL = Words[0]; 621 else 622 VAL = 0; 623 } 624 625 IntegerLiteral::IntegerLiteral(ASTContext &C, const llvm::APInt &V, 626 QualType type, SourceLocation l) 627 : Expr(IntegerLiteralClass, type, VK_RValue, OK_Ordinary, false, false, 628 false, false), 629 Loc(l) { 630 assert(type->isIntegerType() && "Illegal type in IntegerLiteral"); 631 assert(V.getBitWidth() == C.getIntWidth(type) && 632 "Integer type is not the correct size for constant."); 633 setValue(C, V); 634 } 635 636 IntegerLiteral * 637 IntegerLiteral::Create(ASTContext &C, const llvm::APInt &V, 638 QualType type, SourceLocation l) { 639 return new (C) IntegerLiteral(C, V, type, l); 640 } 641 642 IntegerLiteral * 643 IntegerLiteral::Create(ASTContext &C, EmptyShell Empty) { 644 return new (C) IntegerLiteral(Empty); 645 } 646 647 FloatingLiteral::FloatingLiteral(ASTContext &C, const llvm::APFloat &V, 648 bool isexact, QualType Type, SourceLocation L) 649 : Expr(FloatingLiteralClass, Type, VK_RValue, OK_Ordinary, false, false, 650 false, false), Loc(L) { 651 setSemantics(V.getSemantics()); 652 FloatingLiteralBits.IsExact = isexact; 653 setValue(C, V); 654 } 655 656 FloatingLiteral::FloatingLiteral(ASTContext &C, EmptyShell Empty) 657 : Expr(FloatingLiteralClass, Empty) { 658 setRawSemantics(IEEEhalf); 659 FloatingLiteralBits.IsExact = false; 660 } 661 662 FloatingLiteral * 663 FloatingLiteral::Create(ASTContext &C, const llvm::APFloat &V, 664 bool isexact, QualType Type, SourceLocation L) { 665 return new (C) FloatingLiteral(C, V, isexact, Type, L); 666 } 667 668 FloatingLiteral * 669 FloatingLiteral::Create(ASTContext &C, EmptyShell Empty) { 670 return new (C) FloatingLiteral(C, Empty); 671 } 672 673 const llvm::fltSemantics &FloatingLiteral::getSemantics() const { 674 switch(FloatingLiteralBits.Semantics) { 675 case IEEEhalf: 676 return llvm::APFloat::IEEEhalf; 677 case IEEEsingle: 678 return llvm::APFloat::IEEEsingle; 679 case IEEEdouble: 680 return llvm::APFloat::IEEEdouble; 681 case x87DoubleExtended: 682 return llvm::APFloat::x87DoubleExtended; 683 case IEEEquad: 684 return llvm::APFloat::IEEEquad; 685 case PPCDoubleDouble: 686 return llvm::APFloat::PPCDoubleDouble; 687 } 688 llvm_unreachable("Unrecognised floating semantics"); 689 } 690 691 void FloatingLiteral::setSemantics(const llvm::fltSemantics &Sem) { 692 if (&Sem == &llvm::APFloat::IEEEhalf) 693 FloatingLiteralBits.Semantics = IEEEhalf; 694 else if (&Sem == &llvm::APFloat::IEEEsingle) 695 FloatingLiteralBits.Semantics = IEEEsingle; 696 else if (&Sem == &llvm::APFloat::IEEEdouble) 697 FloatingLiteralBits.Semantics = IEEEdouble; 698 else if (&Sem == &llvm::APFloat::x87DoubleExtended) 699 FloatingLiteralBits.Semantics = x87DoubleExtended; 700 else if (&Sem == &llvm::APFloat::IEEEquad) 701 FloatingLiteralBits.Semantics = IEEEquad; 702 else if (&Sem == &llvm::APFloat::PPCDoubleDouble) 703 FloatingLiteralBits.Semantics = PPCDoubleDouble; 704 else 705 llvm_unreachable("Unknown floating semantics"); 706 } 707 708 /// getValueAsApproximateDouble - This returns the value as an inaccurate 709 /// double. Note that this may cause loss of precision, but is useful for 710 /// debugging dumps, etc. 711 double FloatingLiteral::getValueAsApproximateDouble() const { 712 llvm::APFloat V = getValue(); 713 bool ignored; 714 V.convert(llvm::APFloat::IEEEdouble, llvm::APFloat::rmNearestTiesToEven, 715 &ignored); 716 return V.convertToDouble(); 717 } 718 719 int StringLiteral::mapCharByteWidth(TargetInfo const &target,StringKind k) { 720 int CharByteWidth = 0; 721 switch(k) { 722 case Ascii: 723 case UTF8: 724 CharByteWidth = target.getCharWidth(); 725 break; 726 case Wide: 727 CharByteWidth = target.getWCharWidth(); 728 break; 729 case UTF16: 730 CharByteWidth = target.getChar16Width(); 731 break; 732 case UTF32: 733 CharByteWidth = target.getChar32Width(); 734 break; 735 } 736 assert((CharByteWidth & 7) == 0 && "Assumes character size is byte multiple"); 737 CharByteWidth /= 8; 738 assert((CharByteWidth==1 || CharByteWidth==2 || CharByteWidth==4) 739 && "character byte widths supported are 1, 2, and 4 only"); 740 return CharByteWidth; 741 } 742 743 StringLiteral *StringLiteral::Create(ASTContext &C, StringRef Str, 744 StringKind Kind, bool Pascal, QualType Ty, 745 const SourceLocation *Loc, 746 unsigned NumStrs) { 747 // Allocate enough space for the StringLiteral plus an array of locations for 748 // any concatenated string tokens. 749 void *Mem = C.Allocate(sizeof(StringLiteral)+ 750 sizeof(SourceLocation)*(NumStrs-1), 751 llvm::alignOf<StringLiteral>()); 752 StringLiteral *SL = new (Mem) StringLiteral(Ty); 753 754 // OPTIMIZE: could allocate this appended to the StringLiteral. 755 SL->setString(C,Str,Kind,Pascal); 756 757 SL->TokLocs[0] = Loc[0]; 758 SL->NumConcatenated = NumStrs; 759 760 if (NumStrs != 1) 761 memcpy(&SL->TokLocs[1], Loc+1, sizeof(SourceLocation)*(NumStrs-1)); 762 return SL; 763 } 764 765 StringLiteral *StringLiteral::CreateEmpty(ASTContext &C, unsigned NumStrs) { 766 void *Mem = C.Allocate(sizeof(StringLiteral)+ 767 sizeof(SourceLocation)*(NumStrs-1), 768 llvm::alignOf<StringLiteral>()); 769 StringLiteral *SL = new (Mem) StringLiteral(QualType()); 770 SL->CharByteWidth = 0; 771 SL->Length = 0; 772 SL->NumConcatenated = NumStrs; 773 return SL; 774 } 775 776 void StringLiteral::outputString(raw_ostream &OS) const { 777 switch (getKind()) { 778 case Ascii: break; // no prefix. 779 case Wide: OS << 'L'; break; 780 case UTF8: OS << "u8"; break; 781 case UTF16: OS << 'u'; break; 782 case UTF32: OS << 'U'; break; 783 } 784 OS << '"'; 785 static const char Hex[] = "0123456789ABCDEF"; 786 787 unsigned LastSlashX = getLength(); 788 for (unsigned I = 0, N = getLength(); I != N; ++I) { 789 switch (uint32_t Char = getCodeUnit(I)) { 790 default: 791 // FIXME: Convert UTF-8 back to codepoints before rendering. 792 793 // Convert UTF-16 surrogate pairs back to codepoints before rendering. 794 // Leave invalid surrogates alone; we'll use \x for those. 795 if (getKind() == UTF16 && I != N - 1 && Char >= 0xd800 && 796 Char <= 0xdbff) { 797 uint32_t Trail = getCodeUnit(I + 1); 798 if (Trail >= 0xdc00 && Trail <= 0xdfff) { 799 Char = 0x10000 + ((Char - 0xd800) << 10) + (Trail - 0xdc00); 800 ++I; 801 } 802 } 803 804 if (Char > 0xff) { 805 // If this is a wide string, output characters over 0xff using \x 806 // escapes. Otherwise, this is a UTF-16 or UTF-32 string, and Char is a 807 // codepoint: use \x escapes for invalid codepoints. 808 if (getKind() == Wide || 809 (Char >= 0xd800 && Char <= 0xdfff) || Char >= 0x110000) { 810 // FIXME: Is this the best way to print wchar_t? 811 OS << "\\x"; 812 int Shift = 28; 813 while ((Char >> Shift) == 0) 814 Shift -= 4; 815 for (/**/; Shift >= 0; Shift -= 4) 816 OS << Hex[(Char >> Shift) & 15]; 817 LastSlashX = I; 818 break; 819 } 820 821 if (Char > 0xffff) 822 OS << "\\U00" 823 << Hex[(Char >> 20) & 15] 824 << Hex[(Char >> 16) & 15]; 825 else 826 OS << "\\u"; 827 OS << Hex[(Char >> 12) & 15] 828 << Hex[(Char >> 8) & 15] 829 << Hex[(Char >> 4) & 15] 830 << Hex[(Char >> 0) & 15]; 831 break; 832 } 833 834 // If we used \x... for the previous character, and this character is a 835 // hexadecimal digit, prevent it being slurped as part of the \x. 836 if (LastSlashX + 1 == I) { 837 switch (Char) { 838 case '0': case '1': case '2': case '3': case '4': 839 case '5': case '6': case '7': case '8': case '9': 840 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': 841 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': 842 OS << "\"\""; 843 } 844 } 845 846 assert(Char <= 0xff && 847 "Characters above 0xff should already have been handled."); 848 849 if (isPrintable(Char)) 850 OS << (char)Char; 851 else // Output anything hard as an octal escape. 852 OS << '\\' 853 << (char)('0' + ((Char >> 6) & 7)) 854 << (char)('0' + ((Char >> 3) & 7)) 855 << (char)('0' + ((Char >> 0) & 7)); 856 break; 857 // Handle some common non-printable cases to make dumps prettier. 858 case '\\': OS << "\\\\"; break; 859 case '"': OS << "\\\""; break; 860 case '\n': OS << "\\n"; break; 861 case '\t': OS << "\\t"; break; 862 case '\a': OS << "\\a"; break; 863 case '\b': OS << "\\b"; break; 864 } 865 } 866 OS << '"'; 867 } 868 869 void StringLiteral::setString(ASTContext &C, StringRef Str, 870 StringKind Kind, bool IsPascal) { 871 //FIXME: we assume that the string data comes from a target that uses the same 872 // code unit size and endianess for the type of string. 873 this->Kind = Kind; 874 this->IsPascal = IsPascal; 875 876 CharByteWidth = mapCharByteWidth(C.getTargetInfo(),Kind); 877 assert((Str.size()%CharByteWidth == 0) 878 && "size of data must be multiple of CharByteWidth"); 879 Length = Str.size()/CharByteWidth; 880 881 switch(CharByteWidth) { 882 case 1: { 883 char *AStrData = new (C) char[Length]; 884 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData)); 885 StrData.asChar = AStrData; 886 break; 887 } 888 case 2: { 889 uint16_t *AStrData = new (C) uint16_t[Length]; 890 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData)); 891 StrData.asUInt16 = AStrData; 892 break; 893 } 894 case 4: { 895 uint32_t *AStrData = new (C) uint32_t[Length]; 896 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData)); 897 StrData.asUInt32 = AStrData; 898 break; 899 } 900 default: 901 assert(false && "unsupported CharByteWidth"); 902 } 903 } 904 905 /// getLocationOfByte - Return a source location that points to the specified 906 /// byte of this string literal. 907 /// 908 /// Strings are amazingly complex. They can be formed from multiple tokens and 909 /// can have escape sequences in them in addition to the usual trigraph and 910 /// escaped newline business. This routine handles this complexity. 911 /// 912 SourceLocation StringLiteral:: 913 getLocationOfByte(unsigned ByteNo, const SourceManager &SM, 914 const LangOptions &Features, const TargetInfo &Target) const { 915 assert((Kind == StringLiteral::Ascii || Kind == StringLiteral::UTF8) && 916 "Only narrow string literals are currently supported"); 917 918 // Loop over all of the tokens in this string until we find the one that 919 // contains the byte we're looking for. 920 unsigned TokNo = 0; 921 while (1) { 922 assert(TokNo < getNumConcatenated() && "Invalid byte number!"); 923 SourceLocation StrTokLoc = getStrTokenLoc(TokNo); 924 925 // Get the spelling of the string so that we can get the data that makes up 926 // the string literal, not the identifier for the macro it is potentially 927 // expanded through. 928 SourceLocation StrTokSpellingLoc = SM.getSpellingLoc(StrTokLoc); 929 930 // Re-lex the token to get its length and original spelling. 931 std::pair<FileID, unsigned> LocInfo =SM.getDecomposedLoc(StrTokSpellingLoc); 932 bool Invalid = false; 933 StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid); 934 if (Invalid) 935 return StrTokSpellingLoc; 936 937 const char *StrData = Buffer.data()+LocInfo.second; 938 939 // Create a lexer starting at the beginning of this token. 940 Lexer TheLexer(SM.getLocForStartOfFile(LocInfo.first), Features, 941 Buffer.begin(), StrData, Buffer.end()); 942 Token TheTok; 943 TheLexer.LexFromRawLexer(TheTok); 944 945 // Use the StringLiteralParser to compute the length of the string in bytes. 946 StringLiteralParser SLP(&TheTok, 1, SM, Features, Target); 947 unsigned TokNumBytes = SLP.GetStringLength(); 948 949 // If the byte is in this token, return the location of the byte. 950 if (ByteNo < TokNumBytes || 951 (ByteNo == TokNumBytes && TokNo == getNumConcatenated() - 1)) { 952 unsigned Offset = SLP.getOffsetOfStringByte(TheTok, ByteNo); 953 954 // Now that we know the offset of the token in the spelling, use the 955 // preprocessor to get the offset in the original source. 956 return Lexer::AdvanceToTokenCharacter(StrTokLoc, Offset, SM, Features); 957 } 958 959 // Move to the next string token. 960 ++TokNo; 961 ByteNo -= TokNumBytes; 962 } 963 } 964 965 966 967 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 968 /// corresponds to, e.g. "sizeof" or "[pre]++". 969 StringRef UnaryOperator::getOpcodeStr(Opcode Op) { 970 switch (Op) { 971 case UO_PostInc: return "++"; 972 case UO_PostDec: return "--"; 973 case UO_PreInc: return "++"; 974 case UO_PreDec: return "--"; 975 case UO_AddrOf: return "&"; 976 case UO_Deref: return "*"; 977 case UO_Plus: return "+"; 978 case UO_Minus: return "-"; 979 case UO_Not: return "~"; 980 case UO_LNot: return "!"; 981 case UO_Real: return "__real"; 982 case UO_Imag: return "__imag"; 983 case UO_Extension: return "__extension__"; 984 } 985 llvm_unreachable("Unknown unary operator"); 986 } 987 988 UnaryOperatorKind 989 UnaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix) { 990 switch (OO) { 991 default: llvm_unreachable("No unary operator for overloaded function"); 992 case OO_PlusPlus: return Postfix ? UO_PostInc : UO_PreInc; 993 case OO_MinusMinus: return Postfix ? UO_PostDec : UO_PreDec; 994 case OO_Amp: return UO_AddrOf; 995 case OO_Star: return UO_Deref; 996 case OO_Plus: return UO_Plus; 997 case OO_Minus: return UO_Minus; 998 case OO_Tilde: return UO_Not; 999 case OO_Exclaim: return UO_LNot; 1000 } 1001 } 1002 1003 OverloadedOperatorKind UnaryOperator::getOverloadedOperator(Opcode Opc) { 1004 switch (Opc) { 1005 case UO_PostInc: case UO_PreInc: return OO_PlusPlus; 1006 case UO_PostDec: case UO_PreDec: return OO_MinusMinus; 1007 case UO_AddrOf: return OO_Amp; 1008 case UO_Deref: return OO_Star; 1009 case UO_Plus: return OO_Plus; 1010 case UO_Minus: return OO_Minus; 1011 case UO_Not: return OO_Tilde; 1012 case UO_LNot: return OO_Exclaim; 1013 default: return OO_None; 1014 } 1015 } 1016 1017 1018 //===----------------------------------------------------------------------===// 1019 // Postfix Operators. 1020 //===----------------------------------------------------------------------===// 1021 1022 CallExpr::CallExpr(ASTContext& C, StmtClass SC, Expr *fn, unsigned NumPreArgs, 1023 ArrayRef<Expr*> args, QualType t, ExprValueKind VK, 1024 SourceLocation rparenloc) 1025 : Expr(SC, t, VK, OK_Ordinary, 1026 fn->isTypeDependent(), 1027 fn->isValueDependent(), 1028 fn->isInstantiationDependent(), 1029 fn->containsUnexpandedParameterPack()), 1030 NumArgs(args.size()) { 1031 1032 SubExprs = new (C) Stmt*[args.size()+PREARGS_START+NumPreArgs]; 1033 SubExprs[FN] = fn; 1034 for (unsigned i = 0; i != args.size(); ++i) { 1035 if (args[i]->isTypeDependent()) 1036 ExprBits.TypeDependent = true; 1037 if (args[i]->isValueDependent()) 1038 ExprBits.ValueDependent = true; 1039 if (args[i]->isInstantiationDependent()) 1040 ExprBits.InstantiationDependent = true; 1041 if (args[i]->containsUnexpandedParameterPack()) 1042 ExprBits.ContainsUnexpandedParameterPack = true; 1043 1044 SubExprs[i+PREARGS_START+NumPreArgs] = args[i]; 1045 } 1046 1047 CallExprBits.NumPreArgs = NumPreArgs; 1048 RParenLoc = rparenloc; 1049 } 1050 1051 CallExpr::CallExpr(ASTContext& C, Expr *fn, ArrayRef<Expr*> args, 1052 QualType t, ExprValueKind VK, SourceLocation rparenloc) 1053 : Expr(CallExprClass, t, VK, OK_Ordinary, 1054 fn->isTypeDependent(), 1055 fn->isValueDependent(), 1056 fn->isInstantiationDependent(), 1057 fn->containsUnexpandedParameterPack()), 1058 NumArgs(args.size()) { 1059 1060 SubExprs = new (C) Stmt*[args.size()+PREARGS_START]; 1061 SubExprs[FN] = fn; 1062 for (unsigned i = 0; i != args.size(); ++i) { 1063 if (args[i]->isTypeDependent()) 1064 ExprBits.TypeDependent = true; 1065 if (args[i]->isValueDependent()) 1066 ExprBits.ValueDependent = true; 1067 if (args[i]->isInstantiationDependent()) 1068 ExprBits.InstantiationDependent = true; 1069 if (args[i]->containsUnexpandedParameterPack()) 1070 ExprBits.ContainsUnexpandedParameterPack = true; 1071 1072 SubExprs[i+PREARGS_START] = args[i]; 1073 } 1074 1075 CallExprBits.NumPreArgs = 0; 1076 RParenLoc = rparenloc; 1077 } 1078 1079 CallExpr::CallExpr(ASTContext &C, StmtClass SC, EmptyShell Empty) 1080 : Expr(SC, Empty), SubExprs(0), NumArgs(0) { 1081 // FIXME: Why do we allocate this? 1082 SubExprs = new (C) Stmt*[PREARGS_START]; 1083 CallExprBits.NumPreArgs = 0; 1084 } 1085 1086 CallExpr::CallExpr(ASTContext &C, StmtClass SC, unsigned NumPreArgs, 1087 EmptyShell Empty) 1088 : Expr(SC, Empty), SubExprs(0), NumArgs(0) { 1089 // FIXME: Why do we allocate this? 1090 SubExprs = new (C) Stmt*[PREARGS_START+NumPreArgs]; 1091 CallExprBits.NumPreArgs = NumPreArgs; 1092 } 1093 1094 Decl *CallExpr::getCalleeDecl() { 1095 Expr *CEE = getCallee()->IgnoreParenImpCasts(); 1096 1097 while (SubstNonTypeTemplateParmExpr *NTTP 1098 = dyn_cast<SubstNonTypeTemplateParmExpr>(CEE)) { 1099 CEE = NTTP->getReplacement()->IgnoreParenCasts(); 1100 } 1101 1102 // If we're calling a dereference, look at the pointer instead. 1103 if (BinaryOperator *BO = dyn_cast<BinaryOperator>(CEE)) { 1104 if (BO->isPtrMemOp()) 1105 CEE = BO->getRHS()->IgnoreParenCasts(); 1106 } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(CEE)) { 1107 if (UO->getOpcode() == UO_Deref) 1108 CEE = UO->getSubExpr()->IgnoreParenCasts(); 1109 } 1110 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE)) 1111 return DRE->getDecl(); 1112 if (MemberExpr *ME = dyn_cast<MemberExpr>(CEE)) 1113 return ME->getMemberDecl(); 1114 1115 return 0; 1116 } 1117 1118 FunctionDecl *CallExpr::getDirectCallee() { 1119 return dyn_cast_or_null<FunctionDecl>(getCalleeDecl()); 1120 } 1121 1122 /// setNumArgs - This changes the number of arguments present in this call. 1123 /// Any orphaned expressions are deleted by this, and any new operands are set 1124 /// to null. 1125 void CallExpr::setNumArgs(ASTContext& C, unsigned NumArgs) { 1126 // No change, just return. 1127 if (NumArgs == getNumArgs()) return; 1128 1129 // If shrinking # arguments, just delete the extras and forgot them. 1130 if (NumArgs < getNumArgs()) { 1131 this->NumArgs = NumArgs; 1132 return; 1133 } 1134 1135 // Otherwise, we are growing the # arguments. New an bigger argument array. 1136 unsigned NumPreArgs = getNumPreArgs(); 1137 Stmt **NewSubExprs = new (C) Stmt*[NumArgs+PREARGS_START+NumPreArgs]; 1138 // Copy over args. 1139 for (unsigned i = 0; i != getNumArgs()+PREARGS_START+NumPreArgs; ++i) 1140 NewSubExprs[i] = SubExprs[i]; 1141 // Null out new args. 1142 for (unsigned i = getNumArgs()+PREARGS_START+NumPreArgs; 1143 i != NumArgs+PREARGS_START+NumPreArgs; ++i) 1144 NewSubExprs[i] = 0; 1145 1146 if (SubExprs) C.Deallocate(SubExprs); 1147 SubExprs = NewSubExprs; 1148 this->NumArgs = NumArgs; 1149 } 1150 1151 /// isBuiltinCall - If this is a call to a builtin, return the builtin ID. If 1152 /// not, return 0. 1153 unsigned CallExpr::isBuiltinCall() const { 1154 // All simple function calls (e.g. func()) are implicitly cast to pointer to 1155 // function. As a result, we try and obtain the DeclRefExpr from the 1156 // ImplicitCastExpr. 1157 const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee()); 1158 if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()). 1159 return 0; 1160 1161 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr()); 1162 if (!DRE) 1163 return 0; 1164 1165 const FunctionDecl *FDecl = dyn_cast<FunctionDecl>(DRE->getDecl()); 1166 if (!FDecl) 1167 return 0; 1168 1169 if (!FDecl->getIdentifier()) 1170 return 0; 1171 1172 return FDecl->getBuiltinID(); 1173 } 1174 1175 bool CallExpr::isUnevaluatedBuiltinCall(ASTContext &Ctx) const { 1176 if (unsigned BI = isBuiltinCall()) 1177 return Ctx.BuiltinInfo.isUnevaluated(BI); 1178 return false; 1179 } 1180 1181 QualType CallExpr::getCallReturnType() const { 1182 QualType CalleeType = getCallee()->getType(); 1183 if (const PointerType *FnTypePtr = CalleeType->getAs<PointerType>()) 1184 CalleeType = FnTypePtr->getPointeeType(); 1185 else if (const BlockPointerType *BPT = CalleeType->getAs<BlockPointerType>()) 1186 CalleeType = BPT->getPointeeType(); 1187 else if (CalleeType->isSpecificPlaceholderType(BuiltinType::BoundMember)) 1188 // This should never be overloaded and so should never return null. 1189 CalleeType = Expr::findBoundMemberType(getCallee()); 1190 1191 const FunctionType *FnType = CalleeType->castAs<FunctionType>(); 1192 return FnType->getResultType(); 1193 } 1194 1195 SourceLocation CallExpr::getLocStart() const { 1196 if (isa<CXXOperatorCallExpr>(this)) 1197 return cast<CXXOperatorCallExpr>(this)->getLocStart(); 1198 1199 SourceLocation begin = getCallee()->getLocStart(); 1200 if (begin.isInvalid() && getNumArgs() > 0) 1201 begin = getArg(0)->getLocStart(); 1202 return begin; 1203 } 1204 SourceLocation CallExpr::getLocEnd() const { 1205 if (isa<CXXOperatorCallExpr>(this)) 1206 return cast<CXXOperatorCallExpr>(this)->getLocEnd(); 1207 1208 SourceLocation end = getRParenLoc(); 1209 if (end.isInvalid() && getNumArgs() > 0) 1210 end = getArg(getNumArgs() - 1)->getLocEnd(); 1211 return end; 1212 } 1213 1214 OffsetOfExpr *OffsetOfExpr::Create(ASTContext &C, QualType type, 1215 SourceLocation OperatorLoc, 1216 TypeSourceInfo *tsi, 1217 ArrayRef<OffsetOfNode> comps, 1218 ArrayRef<Expr*> exprs, 1219 SourceLocation RParenLoc) { 1220 void *Mem = C.Allocate(sizeof(OffsetOfExpr) + 1221 sizeof(OffsetOfNode) * comps.size() + 1222 sizeof(Expr*) * exprs.size()); 1223 1224 return new (Mem) OffsetOfExpr(C, type, OperatorLoc, tsi, comps, exprs, 1225 RParenLoc); 1226 } 1227 1228 OffsetOfExpr *OffsetOfExpr::CreateEmpty(ASTContext &C, 1229 unsigned numComps, unsigned numExprs) { 1230 void *Mem = C.Allocate(sizeof(OffsetOfExpr) + 1231 sizeof(OffsetOfNode) * numComps + 1232 sizeof(Expr*) * numExprs); 1233 return new (Mem) OffsetOfExpr(numComps, numExprs); 1234 } 1235 1236 OffsetOfExpr::OffsetOfExpr(ASTContext &C, QualType type, 1237 SourceLocation OperatorLoc, TypeSourceInfo *tsi, 1238 ArrayRef<OffsetOfNode> comps, ArrayRef<Expr*> exprs, 1239 SourceLocation RParenLoc) 1240 : Expr(OffsetOfExprClass, type, VK_RValue, OK_Ordinary, 1241 /*TypeDependent=*/false, 1242 /*ValueDependent=*/tsi->getType()->isDependentType(), 1243 tsi->getType()->isInstantiationDependentType(), 1244 tsi->getType()->containsUnexpandedParameterPack()), 1245 OperatorLoc(OperatorLoc), RParenLoc(RParenLoc), TSInfo(tsi), 1246 NumComps(comps.size()), NumExprs(exprs.size()) 1247 { 1248 for (unsigned i = 0; i != comps.size(); ++i) { 1249 setComponent(i, comps[i]); 1250 } 1251 1252 for (unsigned i = 0; i != exprs.size(); ++i) { 1253 if (exprs[i]->isTypeDependent() || exprs[i]->isValueDependent()) 1254 ExprBits.ValueDependent = true; 1255 if (exprs[i]->containsUnexpandedParameterPack()) 1256 ExprBits.ContainsUnexpandedParameterPack = true; 1257 1258 setIndexExpr(i, exprs[i]); 1259 } 1260 } 1261 1262 IdentifierInfo *OffsetOfExpr::OffsetOfNode::getFieldName() const { 1263 assert(getKind() == Field || getKind() == Identifier); 1264 if (getKind() == Field) 1265 return getField()->getIdentifier(); 1266 1267 return reinterpret_cast<IdentifierInfo *> (Data & ~(uintptr_t)Mask); 1268 } 1269 1270 MemberExpr *MemberExpr::Create(ASTContext &C, Expr *base, bool isarrow, 1271 NestedNameSpecifierLoc QualifierLoc, 1272 SourceLocation TemplateKWLoc, 1273 ValueDecl *memberdecl, 1274 DeclAccessPair founddecl, 1275 DeclarationNameInfo nameinfo, 1276 const TemplateArgumentListInfo *targs, 1277 QualType ty, 1278 ExprValueKind vk, 1279 ExprObjectKind ok) { 1280 std::size_t Size = sizeof(MemberExpr); 1281 1282 bool hasQualOrFound = (QualifierLoc || 1283 founddecl.getDecl() != memberdecl || 1284 founddecl.getAccess() != memberdecl->getAccess()); 1285 if (hasQualOrFound) 1286 Size += sizeof(MemberNameQualifier); 1287 1288 if (targs) 1289 Size += ASTTemplateKWAndArgsInfo::sizeFor(targs->size()); 1290 else if (TemplateKWLoc.isValid()) 1291 Size += ASTTemplateKWAndArgsInfo::sizeFor(0); 1292 1293 void *Mem = C.Allocate(Size, llvm::alignOf<MemberExpr>()); 1294 MemberExpr *E = new (Mem) MemberExpr(base, isarrow, memberdecl, nameinfo, 1295 ty, vk, ok); 1296 1297 if (hasQualOrFound) { 1298 // FIXME: Wrong. We should be looking at the member declaration we found. 1299 if (QualifierLoc && QualifierLoc.getNestedNameSpecifier()->isDependent()) { 1300 E->setValueDependent(true); 1301 E->setTypeDependent(true); 1302 E->setInstantiationDependent(true); 1303 } 1304 else if (QualifierLoc && 1305 QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent()) 1306 E->setInstantiationDependent(true); 1307 1308 E->HasQualifierOrFoundDecl = true; 1309 1310 MemberNameQualifier *NQ = E->getMemberQualifier(); 1311 NQ->QualifierLoc = QualifierLoc; 1312 NQ->FoundDecl = founddecl; 1313 } 1314 1315 E->HasTemplateKWAndArgsInfo = (targs || TemplateKWLoc.isValid()); 1316 1317 if (targs) { 1318 bool Dependent = false; 1319 bool InstantiationDependent = false; 1320 bool ContainsUnexpandedParameterPack = false; 1321 E->getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc, *targs, 1322 Dependent, 1323 InstantiationDependent, 1324 ContainsUnexpandedParameterPack); 1325 if (InstantiationDependent) 1326 E->setInstantiationDependent(true); 1327 } else if (TemplateKWLoc.isValid()) { 1328 E->getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc); 1329 } 1330 1331 return E; 1332 } 1333 1334 SourceLocation MemberExpr::getLocStart() const { 1335 if (isImplicitAccess()) { 1336 if (hasQualifier()) 1337 return getQualifierLoc().getBeginLoc(); 1338 return MemberLoc; 1339 } 1340 1341 // FIXME: We don't want this to happen. Rather, we should be able to 1342 // detect all kinds of implicit accesses more cleanly. 1343 SourceLocation BaseStartLoc = getBase()->getLocStart(); 1344 if (BaseStartLoc.isValid()) 1345 return BaseStartLoc; 1346 return MemberLoc; 1347 } 1348 SourceLocation MemberExpr::getLocEnd() const { 1349 SourceLocation EndLoc = getMemberNameInfo().getEndLoc(); 1350 if (hasExplicitTemplateArgs()) 1351 EndLoc = getRAngleLoc(); 1352 else if (EndLoc.isInvalid()) 1353 EndLoc = getBase()->getLocEnd(); 1354 return EndLoc; 1355 } 1356 1357 void CastExpr::CheckCastConsistency() const { 1358 switch (getCastKind()) { 1359 case CK_DerivedToBase: 1360 case CK_UncheckedDerivedToBase: 1361 case CK_DerivedToBaseMemberPointer: 1362 case CK_BaseToDerived: 1363 case CK_BaseToDerivedMemberPointer: 1364 assert(!path_empty() && "Cast kind should have a base path!"); 1365 break; 1366 1367 case CK_CPointerToObjCPointerCast: 1368 assert(getType()->isObjCObjectPointerType()); 1369 assert(getSubExpr()->getType()->isPointerType()); 1370 goto CheckNoBasePath; 1371 1372 case CK_BlockPointerToObjCPointerCast: 1373 assert(getType()->isObjCObjectPointerType()); 1374 assert(getSubExpr()->getType()->isBlockPointerType()); 1375 goto CheckNoBasePath; 1376 1377 case CK_ReinterpretMemberPointer: 1378 assert(getType()->isMemberPointerType()); 1379 assert(getSubExpr()->getType()->isMemberPointerType()); 1380 goto CheckNoBasePath; 1381 1382 case CK_BitCast: 1383 // Arbitrary casts to C pointer types count as bitcasts. 1384 // Otherwise, we should only have block and ObjC pointer casts 1385 // here if they stay within the type kind. 1386 if (!getType()->isPointerType()) { 1387 assert(getType()->isObjCObjectPointerType() == 1388 getSubExpr()->getType()->isObjCObjectPointerType()); 1389 assert(getType()->isBlockPointerType() == 1390 getSubExpr()->getType()->isBlockPointerType()); 1391 } 1392 goto CheckNoBasePath; 1393 1394 case CK_AnyPointerToBlockPointerCast: 1395 assert(getType()->isBlockPointerType()); 1396 assert(getSubExpr()->getType()->isAnyPointerType() && 1397 !getSubExpr()->getType()->isBlockPointerType()); 1398 goto CheckNoBasePath; 1399 1400 case CK_CopyAndAutoreleaseBlockObject: 1401 assert(getType()->isBlockPointerType()); 1402 assert(getSubExpr()->getType()->isBlockPointerType()); 1403 goto CheckNoBasePath; 1404 1405 case CK_FunctionToPointerDecay: 1406 assert(getType()->isPointerType()); 1407 assert(getSubExpr()->getType()->isFunctionType()); 1408 goto CheckNoBasePath; 1409 1410 // These should not have an inheritance path. 1411 case CK_Dynamic: 1412 case CK_ToUnion: 1413 case CK_ArrayToPointerDecay: 1414 case CK_NullToMemberPointer: 1415 case CK_NullToPointer: 1416 case CK_ConstructorConversion: 1417 case CK_IntegralToPointer: 1418 case CK_PointerToIntegral: 1419 case CK_ToVoid: 1420 case CK_VectorSplat: 1421 case CK_IntegralCast: 1422 case CK_IntegralToFloating: 1423 case CK_FloatingToIntegral: 1424 case CK_FloatingCast: 1425 case CK_ObjCObjectLValueCast: 1426 case CK_FloatingRealToComplex: 1427 case CK_FloatingComplexToReal: 1428 case CK_FloatingComplexCast: 1429 case CK_FloatingComplexToIntegralComplex: 1430 case CK_IntegralRealToComplex: 1431 case CK_IntegralComplexToReal: 1432 case CK_IntegralComplexCast: 1433 case CK_IntegralComplexToFloatingComplex: 1434 case CK_ARCProduceObject: 1435 case CK_ARCConsumeObject: 1436 case CK_ARCReclaimReturnedObject: 1437 case CK_ARCExtendBlockObject: 1438 case CK_ZeroToOCLEvent: 1439 assert(!getType()->isBooleanType() && "unheralded conversion to bool"); 1440 goto CheckNoBasePath; 1441 1442 case CK_Dependent: 1443 case CK_LValueToRValue: 1444 case CK_NoOp: 1445 case CK_AtomicToNonAtomic: 1446 case CK_NonAtomicToAtomic: 1447 case CK_PointerToBoolean: 1448 case CK_IntegralToBoolean: 1449 case CK_FloatingToBoolean: 1450 case CK_MemberPointerToBoolean: 1451 case CK_FloatingComplexToBoolean: 1452 case CK_IntegralComplexToBoolean: 1453 case CK_LValueBitCast: // -> bool& 1454 case CK_UserDefinedConversion: // operator bool() 1455 case CK_BuiltinFnToFnPtr: 1456 CheckNoBasePath: 1457 assert(path_empty() && "Cast kind should not have a base path!"); 1458 break; 1459 } 1460 } 1461 1462 const char *CastExpr::getCastKindName() const { 1463 switch (getCastKind()) { 1464 case CK_Dependent: 1465 return "Dependent"; 1466 case CK_BitCast: 1467 return "BitCast"; 1468 case CK_LValueBitCast: 1469 return "LValueBitCast"; 1470 case CK_LValueToRValue: 1471 return "LValueToRValue"; 1472 case CK_NoOp: 1473 return "NoOp"; 1474 case CK_BaseToDerived: 1475 return "BaseToDerived"; 1476 case CK_DerivedToBase: 1477 return "DerivedToBase"; 1478 case CK_UncheckedDerivedToBase: 1479 return "UncheckedDerivedToBase"; 1480 case CK_Dynamic: 1481 return "Dynamic"; 1482 case CK_ToUnion: 1483 return "ToUnion"; 1484 case CK_ArrayToPointerDecay: 1485 return "ArrayToPointerDecay"; 1486 case CK_FunctionToPointerDecay: 1487 return "FunctionToPointerDecay"; 1488 case CK_NullToMemberPointer: 1489 return "NullToMemberPointer"; 1490 case CK_NullToPointer: 1491 return "NullToPointer"; 1492 case CK_BaseToDerivedMemberPointer: 1493 return "BaseToDerivedMemberPointer"; 1494 case CK_DerivedToBaseMemberPointer: 1495 return "DerivedToBaseMemberPointer"; 1496 case CK_ReinterpretMemberPointer: 1497 return "ReinterpretMemberPointer"; 1498 case CK_UserDefinedConversion: 1499 return "UserDefinedConversion"; 1500 case CK_ConstructorConversion: 1501 return "ConstructorConversion"; 1502 case CK_IntegralToPointer: 1503 return "IntegralToPointer"; 1504 case CK_PointerToIntegral: 1505 return "PointerToIntegral"; 1506 case CK_PointerToBoolean: 1507 return "PointerToBoolean"; 1508 case CK_ToVoid: 1509 return "ToVoid"; 1510 case CK_VectorSplat: 1511 return "VectorSplat"; 1512 case CK_IntegralCast: 1513 return "IntegralCast"; 1514 case CK_IntegralToBoolean: 1515 return "IntegralToBoolean"; 1516 case CK_IntegralToFloating: 1517 return "IntegralToFloating"; 1518 case CK_FloatingToIntegral: 1519 return "FloatingToIntegral"; 1520 case CK_FloatingCast: 1521 return "FloatingCast"; 1522 case CK_FloatingToBoolean: 1523 return "FloatingToBoolean"; 1524 case CK_MemberPointerToBoolean: 1525 return "MemberPointerToBoolean"; 1526 case CK_CPointerToObjCPointerCast: 1527 return "CPointerToObjCPointerCast"; 1528 case CK_BlockPointerToObjCPointerCast: 1529 return "BlockPointerToObjCPointerCast"; 1530 case CK_AnyPointerToBlockPointerCast: 1531 return "AnyPointerToBlockPointerCast"; 1532 case CK_ObjCObjectLValueCast: 1533 return "ObjCObjectLValueCast"; 1534 case CK_FloatingRealToComplex: 1535 return "FloatingRealToComplex"; 1536 case CK_FloatingComplexToReal: 1537 return "FloatingComplexToReal"; 1538 case CK_FloatingComplexToBoolean: 1539 return "FloatingComplexToBoolean"; 1540 case CK_FloatingComplexCast: 1541 return "FloatingComplexCast"; 1542 case CK_FloatingComplexToIntegralComplex: 1543 return "FloatingComplexToIntegralComplex"; 1544 case CK_IntegralRealToComplex: 1545 return "IntegralRealToComplex"; 1546 case CK_IntegralComplexToReal: 1547 return "IntegralComplexToReal"; 1548 case CK_IntegralComplexToBoolean: 1549 return "IntegralComplexToBoolean"; 1550 case CK_IntegralComplexCast: 1551 return "IntegralComplexCast"; 1552 case CK_IntegralComplexToFloatingComplex: 1553 return "IntegralComplexToFloatingComplex"; 1554 case CK_ARCConsumeObject: 1555 return "ARCConsumeObject"; 1556 case CK_ARCProduceObject: 1557 return "ARCProduceObject"; 1558 case CK_ARCReclaimReturnedObject: 1559 return "ARCReclaimReturnedObject"; 1560 case CK_ARCExtendBlockObject: 1561 return "ARCCExtendBlockObject"; 1562 case CK_AtomicToNonAtomic: 1563 return "AtomicToNonAtomic"; 1564 case CK_NonAtomicToAtomic: 1565 return "NonAtomicToAtomic"; 1566 case CK_CopyAndAutoreleaseBlockObject: 1567 return "CopyAndAutoreleaseBlockObject"; 1568 case CK_BuiltinFnToFnPtr: 1569 return "BuiltinFnToFnPtr"; 1570 case CK_ZeroToOCLEvent: 1571 return "ZeroToOCLEvent"; 1572 } 1573 1574 llvm_unreachable("Unhandled cast kind!"); 1575 } 1576 1577 Expr *CastExpr::getSubExprAsWritten() { 1578 Expr *SubExpr = 0; 1579 CastExpr *E = this; 1580 do { 1581 SubExpr = E->getSubExpr(); 1582 1583 // Skip through reference binding to temporary. 1584 if (MaterializeTemporaryExpr *Materialize 1585 = dyn_cast<MaterializeTemporaryExpr>(SubExpr)) 1586 SubExpr = Materialize->GetTemporaryExpr(); 1587 1588 // Skip any temporary bindings; they're implicit. 1589 if (CXXBindTemporaryExpr *Binder = dyn_cast<CXXBindTemporaryExpr>(SubExpr)) 1590 SubExpr = Binder->getSubExpr(); 1591 1592 // Conversions by constructor and conversion functions have a 1593 // subexpression describing the call; strip it off. 1594 if (E->getCastKind() == CK_ConstructorConversion) 1595 SubExpr = cast<CXXConstructExpr>(SubExpr)->getArg(0); 1596 else if (E->getCastKind() == CK_UserDefinedConversion) 1597 SubExpr = cast<CXXMemberCallExpr>(SubExpr)->getImplicitObjectArgument(); 1598 1599 // If the subexpression we're left with is an implicit cast, look 1600 // through that, too. 1601 } while ((E = dyn_cast<ImplicitCastExpr>(SubExpr))); 1602 1603 return SubExpr; 1604 } 1605 1606 CXXBaseSpecifier **CastExpr::path_buffer() { 1607 switch (getStmtClass()) { 1608 #define ABSTRACT_STMT(x) 1609 #define CASTEXPR(Type, Base) \ 1610 case Stmt::Type##Class: \ 1611 return reinterpret_cast<CXXBaseSpecifier**>(static_cast<Type*>(this)+1); 1612 #define STMT(Type, Base) 1613 #include "clang/AST/StmtNodes.inc" 1614 default: 1615 llvm_unreachable("non-cast expressions not possible here"); 1616 } 1617 } 1618 1619 void CastExpr::setCastPath(const CXXCastPath &Path) { 1620 assert(Path.size() == path_size()); 1621 memcpy(path_buffer(), Path.data(), Path.size() * sizeof(CXXBaseSpecifier*)); 1622 } 1623 1624 ImplicitCastExpr *ImplicitCastExpr::Create(ASTContext &C, QualType T, 1625 CastKind Kind, Expr *Operand, 1626 const CXXCastPath *BasePath, 1627 ExprValueKind VK) { 1628 unsigned PathSize = (BasePath ? BasePath->size() : 0); 1629 void *Buffer = 1630 C.Allocate(sizeof(ImplicitCastExpr) + PathSize * sizeof(CXXBaseSpecifier*)); 1631 ImplicitCastExpr *E = 1632 new (Buffer) ImplicitCastExpr(T, Kind, Operand, PathSize, VK); 1633 if (PathSize) E->setCastPath(*BasePath); 1634 return E; 1635 } 1636 1637 ImplicitCastExpr *ImplicitCastExpr::CreateEmpty(ASTContext &C, 1638 unsigned PathSize) { 1639 void *Buffer = 1640 C.Allocate(sizeof(ImplicitCastExpr) + PathSize * sizeof(CXXBaseSpecifier*)); 1641 return new (Buffer) ImplicitCastExpr(EmptyShell(), PathSize); 1642 } 1643 1644 1645 CStyleCastExpr *CStyleCastExpr::Create(ASTContext &C, QualType T, 1646 ExprValueKind VK, CastKind K, Expr *Op, 1647 const CXXCastPath *BasePath, 1648 TypeSourceInfo *WrittenTy, 1649 SourceLocation L, SourceLocation R) { 1650 unsigned PathSize = (BasePath ? BasePath->size() : 0); 1651 void *Buffer = 1652 C.Allocate(sizeof(CStyleCastExpr) + PathSize * sizeof(CXXBaseSpecifier*)); 1653 CStyleCastExpr *E = 1654 new (Buffer) CStyleCastExpr(T, VK, K, Op, PathSize, WrittenTy, L, R); 1655 if (PathSize) E->setCastPath(*BasePath); 1656 return E; 1657 } 1658 1659 CStyleCastExpr *CStyleCastExpr::CreateEmpty(ASTContext &C, unsigned PathSize) { 1660 void *Buffer = 1661 C.Allocate(sizeof(CStyleCastExpr) + PathSize * sizeof(CXXBaseSpecifier*)); 1662 return new (Buffer) CStyleCastExpr(EmptyShell(), PathSize); 1663 } 1664 1665 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 1666 /// corresponds to, e.g. "<<=". 1667 StringRef BinaryOperator::getOpcodeStr(Opcode Op) { 1668 switch (Op) { 1669 case BO_PtrMemD: return ".*"; 1670 case BO_PtrMemI: return "->*"; 1671 case BO_Mul: return "*"; 1672 case BO_Div: return "/"; 1673 case BO_Rem: return "%"; 1674 case BO_Add: return "+"; 1675 case BO_Sub: return "-"; 1676 case BO_Shl: return "<<"; 1677 case BO_Shr: return ">>"; 1678 case BO_LT: return "<"; 1679 case BO_GT: return ">"; 1680 case BO_LE: return "<="; 1681 case BO_GE: return ">="; 1682 case BO_EQ: return "=="; 1683 case BO_NE: return "!="; 1684 case BO_And: return "&"; 1685 case BO_Xor: return "^"; 1686 case BO_Or: return "|"; 1687 case BO_LAnd: return "&&"; 1688 case BO_LOr: return "||"; 1689 case BO_Assign: return "="; 1690 case BO_MulAssign: return "*="; 1691 case BO_DivAssign: return "/="; 1692 case BO_RemAssign: return "%="; 1693 case BO_AddAssign: return "+="; 1694 case BO_SubAssign: return "-="; 1695 case BO_ShlAssign: return "<<="; 1696 case BO_ShrAssign: return ">>="; 1697 case BO_AndAssign: return "&="; 1698 case BO_XorAssign: return "^="; 1699 case BO_OrAssign: return "|="; 1700 case BO_Comma: return ","; 1701 } 1702 1703 llvm_unreachable("Invalid OpCode!"); 1704 } 1705 1706 BinaryOperatorKind 1707 BinaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO) { 1708 switch (OO) { 1709 default: llvm_unreachable("Not an overloadable binary operator"); 1710 case OO_Plus: return BO_Add; 1711 case OO_Minus: return BO_Sub; 1712 case OO_Star: return BO_Mul; 1713 case OO_Slash: return BO_Div; 1714 case OO_Percent: return BO_Rem; 1715 case OO_Caret: return BO_Xor; 1716 case OO_Amp: return BO_And; 1717 case OO_Pipe: return BO_Or; 1718 case OO_Equal: return BO_Assign; 1719 case OO_Less: return BO_LT; 1720 case OO_Greater: return BO_GT; 1721 case OO_PlusEqual: return BO_AddAssign; 1722 case OO_MinusEqual: return BO_SubAssign; 1723 case OO_StarEqual: return BO_MulAssign; 1724 case OO_SlashEqual: return BO_DivAssign; 1725 case OO_PercentEqual: return BO_RemAssign; 1726 case OO_CaretEqual: return BO_XorAssign; 1727 case OO_AmpEqual: return BO_AndAssign; 1728 case OO_PipeEqual: return BO_OrAssign; 1729 case OO_LessLess: return BO_Shl; 1730 case OO_GreaterGreater: return BO_Shr; 1731 case OO_LessLessEqual: return BO_ShlAssign; 1732 case OO_GreaterGreaterEqual: return BO_ShrAssign; 1733 case OO_EqualEqual: return BO_EQ; 1734 case OO_ExclaimEqual: return BO_NE; 1735 case OO_LessEqual: return BO_LE; 1736 case OO_GreaterEqual: return BO_GE; 1737 case OO_AmpAmp: return BO_LAnd; 1738 case OO_PipePipe: return BO_LOr; 1739 case OO_Comma: return BO_Comma; 1740 case OO_ArrowStar: return BO_PtrMemI; 1741 } 1742 } 1743 1744 OverloadedOperatorKind BinaryOperator::getOverloadedOperator(Opcode Opc) { 1745 static const OverloadedOperatorKind OverOps[] = { 1746 /* .* Cannot be overloaded */OO_None, OO_ArrowStar, 1747 OO_Star, OO_Slash, OO_Percent, 1748 OO_Plus, OO_Minus, 1749 OO_LessLess, OO_GreaterGreater, 1750 OO_Less, OO_Greater, OO_LessEqual, OO_GreaterEqual, 1751 OO_EqualEqual, OO_ExclaimEqual, 1752 OO_Amp, 1753 OO_Caret, 1754 OO_Pipe, 1755 OO_AmpAmp, 1756 OO_PipePipe, 1757 OO_Equal, OO_StarEqual, 1758 OO_SlashEqual, OO_PercentEqual, 1759 OO_PlusEqual, OO_MinusEqual, 1760 OO_LessLessEqual, OO_GreaterGreaterEqual, 1761 OO_AmpEqual, OO_CaretEqual, 1762 OO_PipeEqual, 1763 OO_Comma 1764 }; 1765 return OverOps[Opc]; 1766 } 1767 1768 InitListExpr::InitListExpr(ASTContext &C, SourceLocation lbraceloc, 1769 ArrayRef<Expr*> initExprs, SourceLocation rbraceloc) 1770 : Expr(InitListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false, 1771 false, false), 1772 InitExprs(C, initExprs.size()), 1773 LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), AltForm(0, true) 1774 { 1775 sawArrayRangeDesignator(false); 1776 setInitializesStdInitializerList(false); 1777 for (unsigned I = 0; I != initExprs.size(); ++I) { 1778 if (initExprs[I]->isTypeDependent()) 1779 ExprBits.TypeDependent = true; 1780 if (initExprs[I]->isValueDependent()) 1781 ExprBits.ValueDependent = true; 1782 if (initExprs[I]->isInstantiationDependent()) 1783 ExprBits.InstantiationDependent = true; 1784 if (initExprs[I]->containsUnexpandedParameterPack()) 1785 ExprBits.ContainsUnexpandedParameterPack = true; 1786 } 1787 1788 InitExprs.insert(C, InitExprs.end(), initExprs.begin(), initExprs.end()); 1789 } 1790 1791 void InitListExpr::reserveInits(ASTContext &C, unsigned NumInits) { 1792 if (NumInits > InitExprs.size()) 1793 InitExprs.reserve(C, NumInits); 1794 } 1795 1796 void InitListExpr::resizeInits(ASTContext &C, unsigned NumInits) { 1797 InitExprs.resize(C, NumInits, 0); 1798 } 1799 1800 Expr *InitListExpr::updateInit(ASTContext &C, unsigned Init, Expr *expr) { 1801 if (Init >= InitExprs.size()) { 1802 InitExprs.insert(C, InitExprs.end(), Init - InitExprs.size() + 1, 0); 1803 InitExprs.back() = expr; 1804 return 0; 1805 } 1806 1807 Expr *Result = cast_or_null<Expr>(InitExprs[Init]); 1808 InitExprs[Init] = expr; 1809 return Result; 1810 } 1811 1812 void InitListExpr::setArrayFiller(Expr *filler) { 1813 assert(!hasArrayFiller() && "Filler already set!"); 1814 ArrayFillerOrUnionFieldInit = filler; 1815 // Fill out any "holes" in the array due to designated initializers. 1816 Expr **inits = getInits(); 1817 for (unsigned i = 0, e = getNumInits(); i != e; ++i) 1818 if (inits[i] == 0) 1819 inits[i] = filler; 1820 } 1821 1822 bool InitListExpr::isStringLiteralInit() const { 1823 if (getNumInits() != 1) 1824 return false; 1825 const ArrayType *AT = getType()->getAsArrayTypeUnsafe(); 1826 if (!AT || !AT->getElementType()->isIntegerType()) 1827 return false; 1828 const Expr *Init = getInit(0)->IgnoreParens(); 1829 return isa<StringLiteral>(Init) || isa<ObjCEncodeExpr>(Init); 1830 } 1831 1832 SourceLocation InitListExpr::getLocStart() const { 1833 if (InitListExpr *SyntacticForm = getSyntacticForm()) 1834 return SyntacticForm->getLocStart(); 1835 SourceLocation Beg = LBraceLoc; 1836 if (Beg.isInvalid()) { 1837 // Find the first non-null initializer. 1838 for (InitExprsTy::const_iterator I = InitExprs.begin(), 1839 E = InitExprs.end(); 1840 I != E; ++I) { 1841 if (Stmt *S = *I) { 1842 Beg = S->getLocStart(); 1843 break; 1844 } 1845 } 1846 } 1847 return Beg; 1848 } 1849 1850 SourceLocation InitListExpr::getLocEnd() const { 1851 if (InitListExpr *SyntacticForm = getSyntacticForm()) 1852 return SyntacticForm->getLocEnd(); 1853 SourceLocation End = RBraceLoc; 1854 if (End.isInvalid()) { 1855 // Find the first non-null initializer from the end. 1856 for (InitExprsTy::const_reverse_iterator I = InitExprs.rbegin(), 1857 E = InitExprs.rend(); 1858 I != E; ++I) { 1859 if (Stmt *S = *I) { 1860 End = S->getLocEnd(); 1861 break; 1862 } 1863 } 1864 } 1865 return End; 1866 } 1867 1868 /// getFunctionType - Return the underlying function type for this block. 1869 /// 1870 const FunctionProtoType *BlockExpr::getFunctionType() const { 1871 // The block pointer is never sugared, but the function type might be. 1872 return cast<BlockPointerType>(getType()) 1873 ->getPointeeType()->castAs<FunctionProtoType>(); 1874 } 1875 1876 SourceLocation BlockExpr::getCaretLocation() const { 1877 return TheBlock->getCaretLocation(); 1878 } 1879 const Stmt *BlockExpr::getBody() const { 1880 return TheBlock->getBody(); 1881 } 1882 Stmt *BlockExpr::getBody() { 1883 return TheBlock->getBody(); 1884 } 1885 1886 1887 //===----------------------------------------------------------------------===// 1888 // Generic Expression Routines 1889 //===----------------------------------------------------------------------===// 1890 1891 /// isUnusedResultAWarning - Return true if this immediate expression should 1892 /// be warned about if the result is unused. If so, fill in Loc and Ranges 1893 /// with location to warn on and the source range[s] to report with the 1894 /// warning. 1895 bool Expr::isUnusedResultAWarning(const Expr *&WarnE, SourceLocation &Loc, 1896 SourceRange &R1, SourceRange &R2, 1897 ASTContext &Ctx) const { 1898 // Don't warn if the expr is type dependent. The type could end up 1899 // instantiating to void. 1900 if (isTypeDependent()) 1901 return false; 1902 1903 switch (getStmtClass()) { 1904 default: 1905 if (getType()->isVoidType()) 1906 return false; 1907 WarnE = this; 1908 Loc = getExprLoc(); 1909 R1 = getSourceRange(); 1910 return true; 1911 case ParenExprClass: 1912 return cast<ParenExpr>(this)->getSubExpr()-> 1913 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); 1914 case GenericSelectionExprClass: 1915 return cast<GenericSelectionExpr>(this)->getResultExpr()-> 1916 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); 1917 case UnaryOperatorClass: { 1918 const UnaryOperator *UO = cast<UnaryOperator>(this); 1919 1920 switch (UO->getOpcode()) { 1921 case UO_Plus: 1922 case UO_Minus: 1923 case UO_AddrOf: 1924 case UO_Not: 1925 case UO_LNot: 1926 case UO_Deref: 1927 break; 1928 case UO_PostInc: 1929 case UO_PostDec: 1930 case UO_PreInc: 1931 case UO_PreDec: // ++/-- 1932 return false; // Not a warning. 1933 case UO_Real: 1934 case UO_Imag: 1935 // accessing a piece of a volatile complex is a side-effect. 1936 if (Ctx.getCanonicalType(UO->getSubExpr()->getType()) 1937 .isVolatileQualified()) 1938 return false; 1939 break; 1940 case UO_Extension: 1941 return UO->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); 1942 } 1943 WarnE = this; 1944 Loc = UO->getOperatorLoc(); 1945 R1 = UO->getSubExpr()->getSourceRange(); 1946 return true; 1947 } 1948 case BinaryOperatorClass: { 1949 const BinaryOperator *BO = cast<BinaryOperator>(this); 1950 switch (BO->getOpcode()) { 1951 default: 1952 break; 1953 // Consider the RHS of comma for side effects. LHS was checked by 1954 // Sema::CheckCommaOperands. 1955 case BO_Comma: 1956 // ((foo = <blah>), 0) is an idiom for hiding the result (and 1957 // lvalue-ness) of an assignment written in a macro. 1958 if (IntegerLiteral *IE = 1959 dyn_cast<IntegerLiteral>(BO->getRHS()->IgnoreParens())) 1960 if (IE->getValue() == 0) 1961 return false; 1962 return BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); 1963 // Consider '||', '&&' to have side effects if the LHS or RHS does. 1964 case BO_LAnd: 1965 case BO_LOr: 1966 if (!BO->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) || 1967 !BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx)) 1968 return false; 1969 break; 1970 } 1971 if (BO->isAssignmentOp()) 1972 return false; 1973 WarnE = this; 1974 Loc = BO->getOperatorLoc(); 1975 R1 = BO->getLHS()->getSourceRange(); 1976 R2 = BO->getRHS()->getSourceRange(); 1977 return true; 1978 } 1979 case CompoundAssignOperatorClass: 1980 case VAArgExprClass: 1981 case AtomicExprClass: 1982 return false; 1983 1984 case ConditionalOperatorClass: { 1985 // If only one of the LHS or RHS is a warning, the operator might 1986 // be being used for control flow. Only warn if both the LHS and 1987 // RHS are warnings. 1988 const ConditionalOperator *Exp = cast<ConditionalOperator>(this); 1989 if (!Exp->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx)) 1990 return false; 1991 if (!Exp->getLHS()) 1992 return true; 1993 return Exp->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); 1994 } 1995 1996 case MemberExprClass: 1997 WarnE = this; 1998 Loc = cast<MemberExpr>(this)->getMemberLoc(); 1999 R1 = SourceRange(Loc, Loc); 2000 R2 = cast<MemberExpr>(this)->getBase()->getSourceRange(); 2001 return true; 2002 2003 case ArraySubscriptExprClass: 2004 WarnE = this; 2005 Loc = cast<ArraySubscriptExpr>(this)->getRBracketLoc(); 2006 R1 = cast<ArraySubscriptExpr>(this)->getLHS()->getSourceRange(); 2007 R2 = cast<ArraySubscriptExpr>(this)->getRHS()->getSourceRange(); 2008 return true; 2009 2010 case CXXOperatorCallExprClass: { 2011 // We warn about operator== and operator!= even when user-defined operator 2012 // overloads as there is no reasonable way to define these such that they 2013 // have non-trivial, desirable side-effects. See the -Wunused-comparison 2014 // warning: these operators are commonly typo'ed, and so warning on them 2015 // provides additional value as well. If this list is updated, 2016 // DiagnoseUnusedComparison should be as well. 2017 const CXXOperatorCallExpr *Op = cast<CXXOperatorCallExpr>(this); 2018 if (Op->getOperator() == OO_EqualEqual || 2019 Op->getOperator() == OO_ExclaimEqual) { 2020 WarnE = this; 2021 Loc = Op->getOperatorLoc(); 2022 R1 = Op->getSourceRange(); 2023 return true; 2024 } 2025 2026 // Fallthrough for generic call handling. 2027 } 2028 case CallExprClass: 2029 case CXXMemberCallExprClass: 2030 case UserDefinedLiteralClass: { 2031 // If this is a direct call, get the callee. 2032 const CallExpr *CE = cast<CallExpr>(this); 2033 if (const Decl *FD = CE->getCalleeDecl()) { 2034 // If the callee has attribute pure, const, or warn_unused_result, warn 2035 // about it. void foo() { strlen("bar"); } should warn. 2036 // 2037 // Note: If new cases are added here, DiagnoseUnusedExprResult should be 2038 // updated to match for QoI. 2039 if (FD->getAttr<WarnUnusedResultAttr>() || 2040 FD->getAttr<PureAttr>() || FD->getAttr<ConstAttr>()) { 2041 WarnE = this; 2042 Loc = CE->getCallee()->getLocStart(); 2043 R1 = CE->getCallee()->getSourceRange(); 2044 2045 if (unsigned NumArgs = CE->getNumArgs()) 2046 R2 = SourceRange(CE->getArg(0)->getLocStart(), 2047 CE->getArg(NumArgs-1)->getLocEnd()); 2048 return true; 2049 } 2050 } 2051 return false; 2052 } 2053 2054 // If we don't know precisely what we're looking at, let's not warn. 2055 case UnresolvedLookupExprClass: 2056 case CXXUnresolvedConstructExprClass: 2057 return false; 2058 2059 case CXXTemporaryObjectExprClass: 2060 case CXXConstructExprClass: 2061 return false; 2062 2063 case ObjCMessageExprClass: { 2064 const ObjCMessageExpr *ME = cast<ObjCMessageExpr>(this); 2065 if (Ctx.getLangOpts().ObjCAutoRefCount && 2066 ME->isInstanceMessage() && 2067 !ME->getType()->isVoidType() && 2068 ME->getSelector().getIdentifierInfoForSlot(0) && 2069 ME->getSelector().getIdentifierInfoForSlot(0) 2070 ->getName().startswith("init")) { 2071 WarnE = this; 2072 Loc = getExprLoc(); 2073 R1 = ME->getSourceRange(); 2074 return true; 2075 } 2076 2077 const ObjCMethodDecl *MD = ME->getMethodDecl(); 2078 if (MD && MD->getAttr<WarnUnusedResultAttr>()) { 2079 WarnE = this; 2080 Loc = getExprLoc(); 2081 return true; 2082 } 2083 return false; 2084 } 2085 2086 case ObjCPropertyRefExprClass: 2087 WarnE = this; 2088 Loc = getExprLoc(); 2089 R1 = getSourceRange(); 2090 return true; 2091 2092 case PseudoObjectExprClass: { 2093 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this); 2094 2095 // Only complain about things that have the form of a getter. 2096 if (isa<UnaryOperator>(PO->getSyntacticForm()) || 2097 isa<BinaryOperator>(PO->getSyntacticForm())) 2098 return false; 2099 2100 WarnE = this; 2101 Loc = getExprLoc(); 2102 R1 = getSourceRange(); 2103 return true; 2104 } 2105 2106 case StmtExprClass: { 2107 // Statement exprs don't logically have side effects themselves, but are 2108 // sometimes used in macros in ways that give them a type that is unused. 2109 // For example ({ blah; foo(); }) will end up with a type if foo has a type. 2110 // however, if the result of the stmt expr is dead, we don't want to emit a 2111 // warning. 2112 const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt(); 2113 if (!CS->body_empty()) { 2114 if (const Expr *E = dyn_cast<Expr>(CS->body_back())) 2115 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); 2116 if (const LabelStmt *Label = dyn_cast<LabelStmt>(CS->body_back())) 2117 if (const Expr *E = dyn_cast<Expr>(Label->getSubStmt())) 2118 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); 2119 } 2120 2121 if (getType()->isVoidType()) 2122 return false; 2123 WarnE = this; 2124 Loc = cast<StmtExpr>(this)->getLParenLoc(); 2125 R1 = getSourceRange(); 2126 return true; 2127 } 2128 case CXXFunctionalCastExprClass: 2129 case CStyleCastExprClass: { 2130 // Ignore an explicit cast to void unless the operand is a non-trivial 2131 // volatile lvalue. 2132 const CastExpr *CE = cast<CastExpr>(this); 2133 if (CE->getCastKind() == CK_ToVoid) { 2134 if (CE->getSubExpr()->isGLValue() && 2135 CE->getSubExpr()->getType().isVolatileQualified()) { 2136 const DeclRefExpr *DRE = 2137 dyn_cast<DeclRefExpr>(CE->getSubExpr()->IgnoreParens()); 2138 if (!(DRE && isa<VarDecl>(DRE->getDecl()) && 2139 cast<VarDecl>(DRE->getDecl())->hasLocalStorage())) { 2140 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, 2141 R1, R2, Ctx); 2142 } 2143 } 2144 return false; 2145 } 2146 2147 // If this is a cast to a constructor conversion, check the operand. 2148 // Otherwise, the result of the cast is unused. 2149 if (CE->getCastKind() == CK_ConstructorConversion) 2150 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); 2151 2152 WarnE = this; 2153 if (const CXXFunctionalCastExpr *CXXCE = 2154 dyn_cast<CXXFunctionalCastExpr>(this)) { 2155 Loc = CXXCE->getTypeBeginLoc(); 2156 R1 = CXXCE->getSubExpr()->getSourceRange(); 2157 } else { 2158 const CStyleCastExpr *CStyleCE = cast<CStyleCastExpr>(this); 2159 Loc = CStyleCE->getLParenLoc(); 2160 R1 = CStyleCE->getSubExpr()->getSourceRange(); 2161 } 2162 return true; 2163 } 2164 case ImplicitCastExprClass: { 2165 const CastExpr *ICE = cast<ImplicitCastExpr>(this); 2166 2167 // lvalue-to-rvalue conversion on a volatile lvalue is a side-effect. 2168 if (ICE->getCastKind() == CK_LValueToRValue && 2169 ICE->getSubExpr()->getType().isVolatileQualified()) 2170 return false; 2171 2172 return ICE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); 2173 } 2174 case CXXDefaultArgExprClass: 2175 return (cast<CXXDefaultArgExpr>(this) 2176 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx)); 2177 2178 case CXXNewExprClass: 2179 // FIXME: In theory, there might be new expressions that don't have side 2180 // effects (e.g. a placement new with an uninitialized POD). 2181 case CXXDeleteExprClass: 2182 return false; 2183 case CXXBindTemporaryExprClass: 2184 return (cast<CXXBindTemporaryExpr>(this) 2185 ->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx)); 2186 case ExprWithCleanupsClass: 2187 return (cast<ExprWithCleanups>(this) 2188 ->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx)); 2189 } 2190 } 2191 2192 /// isOBJCGCCandidate - Check if an expression is objc gc'able. 2193 /// returns true, if it is; false otherwise. 2194 bool Expr::isOBJCGCCandidate(ASTContext &Ctx) const { 2195 const Expr *E = IgnoreParens(); 2196 switch (E->getStmtClass()) { 2197 default: 2198 return false; 2199 case ObjCIvarRefExprClass: 2200 return true; 2201 case Expr::UnaryOperatorClass: 2202 return cast<UnaryOperator>(E)->getSubExpr()->isOBJCGCCandidate(Ctx); 2203 case ImplicitCastExprClass: 2204 return cast<ImplicitCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx); 2205 case MaterializeTemporaryExprClass: 2206 return cast<MaterializeTemporaryExpr>(E)->GetTemporaryExpr() 2207 ->isOBJCGCCandidate(Ctx); 2208 case CStyleCastExprClass: 2209 return cast<CStyleCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx); 2210 case DeclRefExprClass: { 2211 const Decl *D = cast<DeclRefExpr>(E)->getDecl(); 2212 2213 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 2214 if (VD->hasGlobalStorage()) 2215 return true; 2216 QualType T = VD->getType(); 2217 // dereferencing to a pointer is always a gc'able candidate, 2218 // unless it is __weak. 2219 return T->isPointerType() && 2220 (Ctx.getObjCGCAttrKind(T) != Qualifiers::Weak); 2221 } 2222 return false; 2223 } 2224 case MemberExprClass: { 2225 const MemberExpr *M = cast<MemberExpr>(E); 2226 return M->getBase()->isOBJCGCCandidate(Ctx); 2227 } 2228 case ArraySubscriptExprClass: 2229 return cast<ArraySubscriptExpr>(E)->getBase()->isOBJCGCCandidate(Ctx); 2230 } 2231 } 2232 2233 bool Expr::isBoundMemberFunction(ASTContext &Ctx) const { 2234 if (isTypeDependent()) 2235 return false; 2236 return ClassifyLValue(Ctx) == Expr::LV_MemberFunction; 2237 } 2238 2239 QualType Expr::findBoundMemberType(const Expr *expr) { 2240 assert(expr->hasPlaceholderType(BuiltinType::BoundMember)); 2241 2242 // Bound member expressions are always one of these possibilities: 2243 // x->m x.m x->*y x.*y 2244 // (possibly parenthesized) 2245 2246 expr = expr->IgnoreParens(); 2247 if (const MemberExpr *mem = dyn_cast<MemberExpr>(expr)) { 2248 assert(isa<CXXMethodDecl>(mem->getMemberDecl())); 2249 return mem->getMemberDecl()->getType(); 2250 } 2251 2252 if (const BinaryOperator *op = dyn_cast<BinaryOperator>(expr)) { 2253 QualType type = op->getRHS()->getType()->castAs<MemberPointerType>() 2254 ->getPointeeType(); 2255 assert(type->isFunctionType()); 2256 return type; 2257 } 2258 2259 assert(isa<UnresolvedMemberExpr>(expr)); 2260 return QualType(); 2261 } 2262 2263 Expr* Expr::IgnoreParens() { 2264 Expr* E = this; 2265 while (true) { 2266 if (ParenExpr* P = dyn_cast<ParenExpr>(E)) { 2267 E = P->getSubExpr(); 2268 continue; 2269 } 2270 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) { 2271 if (P->getOpcode() == UO_Extension) { 2272 E = P->getSubExpr(); 2273 continue; 2274 } 2275 } 2276 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) { 2277 if (!P->isResultDependent()) { 2278 E = P->getResultExpr(); 2279 continue; 2280 } 2281 } 2282 return E; 2283 } 2284 } 2285 2286 /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr 2287 /// or CastExprs or ImplicitCastExprs, returning their operand. 2288 Expr *Expr::IgnoreParenCasts() { 2289 Expr *E = this; 2290 while (true) { 2291 if (ParenExpr* P = dyn_cast<ParenExpr>(E)) { 2292 E = P->getSubExpr(); 2293 continue; 2294 } 2295 if (CastExpr *P = dyn_cast<CastExpr>(E)) { 2296 E = P->getSubExpr(); 2297 continue; 2298 } 2299 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) { 2300 if (P->getOpcode() == UO_Extension) { 2301 E = P->getSubExpr(); 2302 continue; 2303 } 2304 } 2305 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) { 2306 if (!P->isResultDependent()) { 2307 E = P->getResultExpr(); 2308 continue; 2309 } 2310 } 2311 if (MaterializeTemporaryExpr *Materialize 2312 = dyn_cast<MaterializeTemporaryExpr>(E)) { 2313 E = Materialize->GetTemporaryExpr(); 2314 continue; 2315 } 2316 if (SubstNonTypeTemplateParmExpr *NTTP 2317 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) { 2318 E = NTTP->getReplacement(); 2319 continue; 2320 } 2321 return E; 2322 } 2323 } 2324 2325 /// IgnoreParenLValueCasts - Ignore parentheses and lvalue-to-rvalue 2326 /// casts. This is intended purely as a temporary workaround for code 2327 /// that hasn't yet been rewritten to do the right thing about those 2328 /// casts, and may disappear along with the last internal use. 2329 Expr *Expr::IgnoreParenLValueCasts() { 2330 Expr *E = this; 2331 while (true) { 2332 if (ParenExpr *P = dyn_cast<ParenExpr>(E)) { 2333 E = P->getSubExpr(); 2334 continue; 2335 } else if (CastExpr *P = dyn_cast<CastExpr>(E)) { 2336 if (P->getCastKind() == CK_LValueToRValue) { 2337 E = P->getSubExpr(); 2338 continue; 2339 } 2340 } else if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) { 2341 if (P->getOpcode() == UO_Extension) { 2342 E = P->getSubExpr(); 2343 continue; 2344 } 2345 } else if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) { 2346 if (!P->isResultDependent()) { 2347 E = P->getResultExpr(); 2348 continue; 2349 } 2350 } else if (MaterializeTemporaryExpr *Materialize 2351 = dyn_cast<MaterializeTemporaryExpr>(E)) { 2352 E = Materialize->GetTemporaryExpr(); 2353 continue; 2354 } else if (SubstNonTypeTemplateParmExpr *NTTP 2355 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) { 2356 E = NTTP->getReplacement(); 2357 continue; 2358 } 2359 break; 2360 } 2361 return E; 2362 } 2363 2364 Expr *Expr::ignoreParenBaseCasts() { 2365 Expr *E = this; 2366 while (true) { 2367 if (ParenExpr *P = dyn_cast<ParenExpr>(E)) { 2368 E = P->getSubExpr(); 2369 continue; 2370 } 2371 if (CastExpr *CE = dyn_cast<CastExpr>(E)) { 2372 if (CE->getCastKind() == CK_DerivedToBase || 2373 CE->getCastKind() == CK_UncheckedDerivedToBase || 2374 CE->getCastKind() == CK_NoOp) { 2375 E = CE->getSubExpr(); 2376 continue; 2377 } 2378 } 2379 2380 return E; 2381 } 2382 } 2383 2384 Expr *Expr::IgnoreParenImpCasts() { 2385 Expr *E = this; 2386 while (true) { 2387 if (ParenExpr *P = dyn_cast<ParenExpr>(E)) { 2388 E = P->getSubExpr(); 2389 continue; 2390 } 2391 if (ImplicitCastExpr *P = dyn_cast<ImplicitCastExpr>(E)) { 2392 E = P->getSubExpr(); 2393 continue; 2394 } 2395 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) { 2396 if (P->getOpcode() == UO_Extension) { 2397 E = P->getSubExpr(); 2398 continue; 2399 } 2400 } 2401 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) { 2402 if (!P->isResultDependent()) { 2403 E = P->getResultExpr(); 2404 continue; 2405 } 2406 } 2407 if (MaterializeTemporaryExpr *Materialize 2408 = dyn_cast<MaterializeTemporaryExpr>(E)) { 2409 E = Materialize->GetTemporaryExpr(); 2410 continue; 2411 } 2412 if (SubstNonTypeTemplateParmExpr *NTTP 2413 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) { 2414 E = NTTP->getReplacement(); 2415 continue; 2416 } 2417 return E; 2418 } 2419 } 2420 2421 Expr *Expr::IgnoreConversionOperator() { 2422 if (CXXMemberCallExpr *MCE = dyn_cast<CXXMemberCallExpr>(this)) { 2423 if (MCE->getMethodDecl() && isa<CXXConversionDecl>(MCE->getMethodDecl())) 2424 return MCE->getImplicitObjectArgument(); 2425 } 2426 return this; 2427 } 2428 2429 /// IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the 2430 /// value (including ptr->int casts of the same size). Strip off any 2431 /// ParenExpr or CastExprs, returning their operand. 2432 Expr *Expr::IgnoreParenNoopCasts(ASTContext &Ctx) { 2433 Expr *E = this; 2434 while (true) { 2435 if (ParenExpr *P = dyn_cast<ParenExpr>(E)) { 2436 E = P->getSubExpr(); 2437 continue; 2438 } 2439 2440 if (CastExpr *P = dyn_cast<CastExpr>(E)) { 2441 // We ignore integer <-> casts that are of the same width, ptr<->ptr and 2442 // ptr<->int casts of the same width. We also ignore all identity casts. 2443 Expr *SE = P->getSubExpr(); 2444 2445 if (Ctx.hasSameUnqualifiedType(E->getType(), SE->getType())) { 2446 E = SE; 2447 continue; 2448 } 2449 2450 if ((E->getType()->isPointerType() || 2451 E->getType()->isIntegralType(Ctx)) && 2452 (SE->getType()->isPointerType() || 2453 SE->getType()->isIntegralType(Ctx)) && 2454 Ctx.getTypeSize(E->getType()) == Ctx.getTypeSize(SE->getType())) { 2455 E = SE; 2456 continue; 2457 } 2458 } 2459 2460 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) { 2461 if (P->getOpcode() == UO_Extension) { 2462 E = P->getSubExpr(); 2463 continue; 2464 } 2465 } 2466 2467 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) { 2468 if (!P->isResultDependent()) { 2469 E = P->getResultExpr(); 2470 continue; 2471 } 2472 } 2473 2474 if (SubstNonTypeTemplateParmExpr *NTTP 2475 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) { 2476 E = NTTP->getReplacement(); 2477 continue; 2478 } 2479 2480 return E; 2481 } 2482 } 2483 2484 bool Expr::isDefaultArgument() const { 2485 const Expr *E = this; 2486 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E)) 2487 E = M->GetTemporaryExpr(); 2488 2489 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) 2490 E = ICE->getSubExprAsWritten(); 2491 2492 return isa<CXXDefaultArgExpr>(E); 2493 } 2494 2495 /// \brief Skip over any no-op casts and any temporary-binding 2496 /// expressions. 2497 static const Expr *skipTemporaryBindingsNoOpCastsAndParens(const Expr *E) { 2498 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E)) 2499 E = M->GetTemporaryExpr(); 2500 2501 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) { 2502 if (ICE->getCastKind() == CK_NoOp) 2503 E = ICE->getSubExpr(); 2504 else 2505 break; 2506 } 2507 2508 while (const CXXBindTemporaryExpr *BE = dyn_cast<CXXBindTemporaryExpr>(E)) 2509 E = BE->getSubExpr(); 2510 2511 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) { 2512 if (ICE->getCastKind() == CK_NoOp) 2513 E = ICE->getSubExpr(); 2514 else 2515 break; 2516 } 2517 2518 return E->IgnoreParens(); 2519 } 2520 2521 /// isTemporaryObject - Determines if this expression produces a 2522 /// temporary of the given class type. 2523 bool Expr::isTemporaryObject(ASTContext &C, const CXXRecordDecl *TempTy) const { 2524 if (!C.hasSameUnqualifiedType(getType(), C.getTypeDeclType(TempTy))) 2525 return false; 2526 2527 const Expr *E = skipTemporaryBindingsNoOpCastsAndParens(this); 2528 2529 // Temporaries are by definition pr-values of class type. 2530 if (!E->Classify(C).isPRValue()) { 2531 // In this context, property reference is a message call and is pr-value. 2532 if (!isa<ObjCPropertyRefExpr>(E)) 2533 return false; 2534 } 2535 2536 // Black-list a few cases which yield pr-values of class type that don't 2537 // refer to temporaries of that type: 2538 2539 // - implicit derived-to-base conversions 2540 if (isa<ImplicitCastExpr>(E)) { 2541 switch (cast<ImplicitCastExpr>(E)->getCastKind()) { 2542 case CK_DerivedToBase: 2543 case CK_UncheckedDerivedToBase: 2544 return false; 2545 default: 2546 break; 2547 } 2548 } 2549 2550 // - member expressions (all) 2551 if (isa<MemberExpr>(E)) 2552 return false; 2553 2554 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) 2555 if (BO->isPtrMemOp()) 2556 return false; 2557 2558 // - opaque values (all) 2559 if (isa<OpaqueValueExpr>(E)) 2560 return false; 2561 2562 return true; 2563 } 2564 2565 bool Expr::isImplicitCXXThis() const { 2566 const Expr *E = this; 2567 2568 // Strip away parentheses and casts we don't care about. 2569 while (true) { 2570 if (const ParenExpr *Paren = dyn_cast<ParenExpr>(E)) { 2571 E = Paren->getSubExpr(); 2572 continue; 2573 } 2574 2575 if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) { 2576 if (ICE->getCastKind() == CK_NoOp || 2577 ICE->getCastKind() == CK_LValueToRValue || 2578 ICE->getCastKind() == CK_DerivedToBase || 2579 ICE->getCastKind() == CK_UncheckedDerivedToBase) { 2580 E = ICE->getSubExpr(); 2581 continue; 2582 } 2583 } 2584 2585 if (const UnaryOperator* UnOp = dyn_cast<UnaryOperator>(E)) { 2586 if (UnOp->getOpcode() == UO_Extension) { 2587 E = UnOp->getSubExpr(); 2588 continue; 2589 } 2590 } 2591 2592 if (const MaterializeTemporaryExpr *M 2593 = dyn_cast<MaterializeTemporaryExpr>(E)) { 2594 E = M->GetTemporaryExpr(); 2595 continue; 2596 } 2597 2598 break; 2599 } 2600 2601 if (const CXXThisExpr *This = dyn_cast<CXXThisExpr>(E)) 2602 return This->isImplicit(); 2603 2604 return false; 2605 } 2606 2607 /// hasAnyTypeDependentArguments - Determines if any of the expressions 2608 /// in Exprs is type-dependent. 2609 bool Expr::hasAnyTypeDependentArguments(ArrayRef<Expr *> Exprs) { 2610 for (unsigned I = 0; I < Exprs.size(); ++I) 2611 if (Exprs[I]->isTypeDependent()) 2612 return true; 2613 2614 return false; 2615 } 2616 2617 bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef) const { 2618 // This function is attempting whether an expression is an initializer 2619 // which can be evaluated at compile-time. isEvaluatable handles most 2620 // of the cases, but it can't deal with some initializer-specific 2621 // expressions, and it can't deal with aggregates; we deal with those here, 2622 // and fall back to isEvaluatable for the other cases. 2623 2624 // If we ever capture reference-binding directly in the AST, we can 2625 // kill the second parameter. 2626 2627 if (IsForRef) { 2628 EvalResult Result; 2629 return EvaluateAsLValue(Result, Ctx) && !Result.HasSideEffects; 2630 } 2631 2632 switch (getStmtClass()) { 2633 default: break; 2634 case IntegerLiteralClass: 2635 case FloatingLiteralClass: 2636 case StringLiteralClass: 2637 case ObjCStringLiteralClass: 2638 case ObjCEncodeExprClass: 2639 return true; 2640 case CXXTemporaryObjectExprClass: 2641 case CXXConstructExprClass: { 2642 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this); 2643 2644 // Only if it's 2645 if (CE->getConstructor()->isTrivial()) { 2646 // 1) an application of the trivial default constructor or 2647 if (!CE->getNumArgs()) return true; 2648 2649 // 2) an elidable trivial copy construction of an operand which is 2650 // itself a constant initializer. Note that we consider the 2651 // operand on its own, *not* as a reference binding. 2652 if (CE->isElidable() && 2653 CE->getArg(0)->isConstantInitializer(Ctx, false)) 2654 return true; 2655 } 2656 2657 // 3) a foldable constexpr constructor. 2658 break; 2659 } 2660 case CompoundLiteralExprClass: { 2661 // This handles gcc's extension that allows global initializers like 2662 // "struct x {int x;} x = (struct x) {};". 2663 // FIXME: This accepts other cases it shouldn't! 2664 const Expr *Exp = cast<CompoundLiteralExpr>(this)->getInitializer(); 2665 return Exp->isConstantInitializer(Ctx, false); 2666 } 2667 case InitListExprClass: { 2668 // FIXME: This doesn't deal with fields with reference types correctly. 2669 // FIXME: This incorrectly allows pointers cast to integers to be assigned 2670 // to bitfields. 2671 const InitListExpr *Exp = cast<InitListExpr>(this); 2672 unsigned numInits = Exp->getNumInits(); 2673 for (unsigned i = 0; i < numInits; i++) { 2674 if (!Exp->getInit(i)->isConstantInitializer(Ctx, false)) 2675 return false; 2676 } 2677 return true; 2678 } 2679 case ImplicitValueInitExprClass: 2680 return true; 2681 case ParenExprClass: 2682 return cast<ParenExpr>(this)->getSubExpr() 2683 ->isConstantInitializer(Ctx, IsForRef); 2684 case GenericSelectionExprClass: 2685 if (cast<GenericSelectionExpr>(this)->isResultDependent()) 2686 return false; 2687 return cast<GenericSelectionExpr>(this)->getResultExpr() 2688 ->isConstantInitializer(Ctx, IsForRef); 2689 case ChooseExprClass: 2690 return cast<ChooseExpr>(this)->getChosenSubExpr(Ctx) 2691 ->isConstantInitializer(Ctx, IsForRef); 2692 case UnaryOperatorClass: { 2693 const UnaryOperator* Exp = cast<UnaryOperator>(this); 2694 if (Exp->getOpcode() == UO_Extension) 2695 return Exp->getSubExpr()->isConstantInitializer(Ctx, false); 2696 break; 2697 } 2698 case CXXFunctionalCastExprClass: 2699 case CXXStaticCastExprClass: 2700 case ImplicitCastExprClass: 2701 case CStyleCastExprClass: { 2702 const CastExpr *CE = cast<CastExpr>(this); 2703 2704 // If we're promoting an integer to an _Atomic type then this is constant 2705 // if the integer is constant. We also need to check the converse in case 2706 // someone does something like: 2707 // 2708 // int a = (_Atomic(int))42; 2709 // 2710 // I doubt anyone would write code like this directly, but it's quite 2711 // possible as the result of macro expansions. 2712 if (CE->getCastKind() == CK_NonAtomicToAtomic || 2713 CE->getCastKind() == CK_AtomicToNonAtomic) 2714 return CE->getSubExpr()->isConstantInitializer(Ctx, false); 2715 2716 // Handle bitcasts of vector constants. 2717 if (getType()->isVectorType() && CE->getCastKind() == CK_BitCast) 2718 return CE->getSubExpr()->isConstantInitializer(Ctx, false); 2719 2720 // Handle misc casts we want to ignore. 2721 // FIXME: Is it really safe to ignore all these? 2722 if (CE->getCastKind() == CK_NoOp || 2723 CE->getCastKind() == CK_LValueToRValue || 2724 CE->getCastKind() == CK_ToUnion || 2725 CE->getCastKind() == CK_ConstructorConversion) 2726 return CE->getSubExpr()->isConstantInitializer(Ctx, false); 2727 2728 break; 2729 } 2730 case MaterializeTemporaryExprClass: 2731 return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr() 2732 ->isConstantInitializer(Ctx, false); 2733 } 2734 return isEvaluatable(Ctx); 2735 } 2736 2737 bool Expr::HasSideEffects(const ASTContext &Ctx) const { 2738 if (isInstantiationDependent()) 2739 return true; 2740 2741 switch (getStmtClass()) { 2742 case NoStmtClass: 2743 #define ABSTRACT_STMT(Type) 2744 #define STMT(Type, Base) case Type##Class: 2745 #define EXPR(Type, Base) 2746 #include "clang/AST/StmtNodes.inc" 2747 llvm_unreachable("unexpected Expr kind"); 2748 2749 case DependentScopeDeclRefExprClass: 2750 case CXXUnresolvedConstructExprClass: 2751 case CXXDependentScopeMemberExprClass: 2752 case UnresolvedLookupExprClass: 2753 case UnresolvedMemberExprClass: 2754 case PackExpansionExprClass: 2755 case SubstNonTypeTemplateParmPackExprClass: 2756 case FunctionParmPackExprClass: 2757 llvm_unreachable("shouldn't see dependent / unresolved nodes here"); 2758 2759 case DeclRefExprClass: 2760 case ObjCIvarRefExprClass: 2761 case PredefinedExprClass: 2762 case IntegerLiteralClass: 2763 case FloatingLiteralClass: 2764 case ImaginaryLiteralClass: 2765 case StringLiteralClass: 2766 case CharacterLiteralClass: 2767 case OffsetOfExprClass: 2768 case ImplicitValueInitExprClass: 2769 case UnaryExprOrTypeTraitExprClass: 2770 case AddrLabelExprClass: 2771 case GNUNullExprClass: 2772 case CXXBoolLiteralExprClass: 2773 case CXXNullPtrLiteralExprClass: 2774 case CXXThisExprClass: 2775 case CXXScalarValueInitExprClass: 2776 case TypeTraitExprClass: 2777 case UnaryTypeTraitExprClass: 2778 case BinaryTypeTraitExprClass: 2779 case ArrayTypeTraitExprClass: 2780 case ExpressionTraitExprClass: 2781 case CXXNoexceptExprClass: 2782 case SizeOfPackExprClass: 2783 case ObjCStringLiteralClass: 2784 case ObjCEncodeExprClass: 2785 case ObjCBoolLiteralExprClass: 2786 case CXXUuidofExprClass: 2787 case OpaqueValueExprClass: 2788 // These never have a side-effect. 2789 return false; 2790 2791 case CallExprClass: 2792 case CompoundAssignOperatorClass: 2793 case VAArgExprClass: 2794 case AtomicExprClass: 2795 case StmtExprClass: 2796 case CXXOperatorCallExprClass: 2797 case CXXMemberCallExprClass: 2798 case UserDefinedLiteralClass: 2799 case CXXThrowExprClass: 2800 case CXXNewExprClass: 2801 case CXXDeleteExprClass: 2802 case ExprWithCleanupsClass: 2803 case CXXBindTemporaryExprClass: 2804 case BlockExprClass: 2805 case CUDAKernelCallExprClass: 2806 // These always have a side-effect. 2807 return true; 2808 2809 case ParenExprClass: 2810 case ArraySubscriptExprClass: 2811 case MemberExprClass: 2812 case ConditionalOperatorClass: 2813 case BinaryConditionalOperatorClass: 2814 case CompoundLiteralExprClass: 2815 case ExtVectorElementExprClass: 2816 case DesignatedInitExprClass: 2817 case ParenListExprClass: 2818 case CXXPseudoDestructorExprClass: 2819 case SubstNonTypeTemplateParmExprClass: 2820 case MaterializeTemporaryExprClass: 2821 case ShuffleVectorExprClass: 2822 case AsTypeExprClass: 2823 // These have a side-effect if any subexpression does. 2824 break; 2825 2826 case UnaryOperatorClass: 2827 if (cast<UnaryOperator>(this)->isIncrementDecrementOp()) 2828 return true; 2829 break; 2830 2831 case BinaryOperatorClass: 2832 if (cast<BinaryOperator>(this)->isAssignmentOp()) 2833 return true; 2834 break; 2835 2836 case InitListExprClass: 2837 // FIXME: The children for an InitListExpr doesn't include the array filler. 2838 if (const Expr *E = cast<InitListExpr>(this)->getArrayFiller()) 2839 if (E->HasSideEffects(Ctx)) 2840 return true; 2841 break; 2842 2843 case GenericSelectionExprClass: 2844 return cast<GenericSelectionExpr>(this)->getResultExpr()-> 2845 HasSideEffects(Ctx); 2846 2847 case ChooseExprClass: 2848 return cast<ChooseExpr>(this)->getChosenSubExpr(Ctx)->HasSideEffects(Ctx); 2849 2850 case CXXDefaultArgExprClass: 2851 return cast<CXXDefaultArgExpr>(this)->getExpr()->HasSideEffects(Ctx); 2852 2853 case CXXDynamicCastExprClass: { 2854 // A dynamic_cast expression has side-effects if it can throw. 2855 const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(this); 2856 if (DCE->getTypeAsWritten()->isReferenceType() && 2857 DCE->getCastKind() == CK_Dynamic) 2858 return true; 2859 } // Fall through. 2860 case ImplicitCastExprClass: 2861 case CStyleCastExprClass: 2862 case CXXStaticCastExprClass: 2863 case CXXReinterpretCastExprClass: 2864 case CXXConstCastExprClass: 2865 case CXXFunctionalCastExprClass: { 2866 const CastExpr *CE = cast<CastExpr>(this); 2867 if (CE->getCastKind() == CK_LValueToRValue && 2868 CE->getSubExpr()->getType().isVolatileQualified()) 2869 return true; 2870 break; 2871 } 2872 2873 case CXXTypeidExprClass: 2874 // typeid might throw if its subexpression is potentially-evaluated, so has 2875 // side-effects in that case whether or not its subexpression does. 2876 return cast<CXXTypeidExpr>(this)->isPotentiallyEvaluated(); 2877 2878 case CXXConstructExprClass: 2879 case CXXTemporaryObjectExprClass: { 2880 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this); 2881 if (!CE->getConstructor()->isTrivial()) 2882 return true; 2883 // A trivial constructor does not add any side-effects of its own. Just look 2884 // at its arguments. 2885 break; 2886 } 2887 2888 case LambdaExprClass: { 2889 const LambdaExpr *LE = cast<LambdaExpr>(this); 2890 for (LambdaExpr::capture_iterator I = LE->capture_begin(), 2891 E = LE->capture_end(); I != E; ++I) 2892 if (I->getCaptureKind() == LCK_ByCopy) 2893 // FIXME: Only has a side-effect if the variable is volatile or if 2894 // the copy would invoke a non-trivial copy constructor. 2895 return true; 2896 return false; 2897 } 2898 2899 case PseudoObjectExprClass: { 2900 // Only look for side-effects in the semantic form, and look past 2901 // OpaqueValueExpr bindings in that form. 2902 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this); 2903 for (PseudoObjectExpr::const_semantics_iterator I = PO->semantics_begin(), 2904 E = PO->semantics_end(); 2905 I != E; ++I) { 2906 const Expr *Subexpr = *I; 2907 if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(Subexpr)) 2908 Subexpr = OVE->getSourceExpr(); 2909 if (Subexpr->HasSideEffects(Ctx)) 2910 return true; 2911 } 2912 return false; 2913 } 2914 2915 case ObjCBoxedExprClass: 2916 case ObjCArrayLiteralClass: 2917 case ObjCDictionaryLiteralClass: 2918 case ObjCMessageExprClass: 2919 case ObjCSelectorExprClass: 2920 case ObjCProtocolExprClass: 2921 case ObjCPropertyRefExprClass: 2922 case ObjCIsaExprClass: 2923 case ObjCIndirectCopyRestoreExprClass: 2924 case ObjCSubscriptRefExprClass: 2925 case ObjCBridgedCastExprClass: 2926 // FIXME: Classify these cases better. 2927 return true; 2928 } 2929 2930 // Recurse to children. 2931 for (const_child_range SubStmts = children(); SubStmts; ++SubStmts) 2932 if (const Stmt *S = *SubStmts) 2933 if (cast<Expr>(S)->HasSideEffects(Ctx)) 2934 return true; 2935 2936 return false; 2937 } 2938 2939 namespace { 2940 /// \brief Look for a call to a non-trivial function within an expression. 2941 class NonTrivialCallFinder : public EvaluatedExprVisitor<NonTrivialCallFinder> 2942 { 2943 typedef EvaluatedExprVisitor<NonTrivialCallFinder> Inherited; 2944 2945 bool NonTrivial; 2946 2947 public: 2948 explicit NonTrivialCallFinder(ASTContext &Context) 2949 : Inherited(Context), NonTrivial(false) { } 2950 2951 bool hasNonTrivialCall() const { return NonTrivial; } 2952 2953 void VisitCallExpr(CallExpr *E) { 2954 if (CXXMethodDecl *Method 2955 = dyn_cast_or_null<CXXMethodDecl>(E->getCalleeDecl())) { 2956 if (Method->isTrivial()) { 2957 // Recurse to children of the call. 2958 Inherited::VisitStmt(E); 2959 return; 2960 } 2961 } 2962 2963 NonTrivial = true; 2964 } 2965 2966 void VisitCXXConstructExpr(CXXConstructExpr *E) { 2967 if (E->getConstructor()->isTrivial()) { 2968 // Recurse to children of the call. 2969 Inherited::VisitStmt(E); 2970 return; 2971 } 2972 2973 NonTrivial = true; 2974 } 2975 2976 void VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) { 2977 if (E->getTemporary()->getDestructor()->isTrivial()) { 2978 Inherited::VisitStmt(E); 2979 return; 2980 } 2981 2982 NonTrivial = true; 2983 } 2984 }; 2985 } 2986 2987 bool Expr::hasNonTrivialCall(ASTContext &Ctx) { 2988 NonTrivialCallFinder Finder(Ctx); 2989 Finder.Visit(this); 2990 return Finder.hasNonTrivialCall(); 2991 } 2992 2993 /// isNullPointerConstant - C99 6.3.2.3p3 - Return whether this is a null 2994 /// pointer constant or not, as well as the specific kind of constant detected. 2995 /// Null pointer constants can be integer constant expressions with the 2996 /// value zero, casts of zero to void*, nullptr (C++0X), or __null 2997 /// (a GNU extension). 2998 Expr::NullPointerConstantKind 2999 Expr::isNullPointerConstant(ASTContext &Ctx, 3000 NullPointerConstantValueDependence NPC) const { 3001 if (isValueDependent()) { 3002 switch (NPC) { 3003 case NPC_NeverValueDependent: 3004 llvm_unreachable("Unexpected value dependent expression!"); 3005 case NPC_ValueDependentIsNull: 3006 if (isTypeDependent() || getType()->isIntegralType(Ctx)) 3007 return NPCK_ZeroExpression; 3008 else 3009 return NPCK_NotNull; 3010 3011 case NPC_ValueDependentIsNotNull: 3012 return NPCK_NotNull; 3013 } 3014 } 3015 3016 // Strip off a cast to void*, if it exists. Except in C++. 3017 if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) { 3018 if (!Ctx.getLangOpts().CPlusPlus) { 3019 // Check that it is a cast to void*. 3020 if (const PointerType *PT = CE->getType()->getAs<PointerType>()) { 3021 QualType Pointee = PT->getPointeeType(); 3022 if (!Pointee.hasQualifiers() && 3023 Pointee->isVoidType() && // to void* 3024 CE->getSubExpr()->getType()->isIntegerType()) // from int. 3025 return CE->getSubExpr()->isNullPointerConstant(Ctx, NPC); 3026 } 3027 } 3028 } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) { 3029 // Ignore the ImplicitCastExpr type entirely. 3030 return ICE->getSubExpr()->isNullPointerConstant(Ctx, NPC); 3031 } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) { 3032 // Accept ((void*)0) as a null pointer constant, as many other 3033 // implementations do. 3034 return PE->getSubExpr()->isNullPointerConstant(Ctx, NPC); 3035 } else if (const GenericSelectionExpr *GE = 3036 dyn_cast<GenericSelectionExpr>(this)) { 3037 return GE->getResultExpr()->isNullPointerConstant(Ctx, NPC); 3038 } else if (const CXXDefaultArgExpr *DefaultArg 3039 = dyn_cast<CXXDefaultArgExpr>(this)) { 3040 // See through default argument expressions 3041 return DefaultArg->getExpr()->isNullPointerConstant(Ctx, NPC); 3042 } else if (isa<GNUNullExpr>(this)) { 3043 // The GNU __null extension is always a null pointer constant. 3044 return NPCK_GNUNull; 3045 } else if (const MaterializeTemporaryExpr *M 3046 = dyn_cast<MaterializeTemporaryExpr>(this)) { 3047 return M->GetTemporaryExpr()->isNullPointerConstant(Ctx, NPC); 3048 } else if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(this)) { 3049 if (const Expr *Source = OVE->getSourceExpr()) 3050 return Source->isNullPointerConstant(Ctx, NPC); 3051 } 3052 3053 // C++11 nullptr_t is always a null pointer constant. 3054 if (getType()->isNullPtrType()) 3055 return NPCK_CXX11_nullptr; 3056 3057 if (const RecordType *UT = getType()->getAsUnionType()) 3058 if (UT && UT->getDecl()->hasAttr<TransparentUnionAttr>()) 3059 if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(this)){ 3060 const Expr *InitExpr = CLE->getInitializer(); 3061 if (const InitListExpr *ILE = dyn_cast<InitListExpr>(InitExpr)) 3062 return ILE->getInit(0)->isNullPointerConstant(Ctx, NPC); 3063 } 3064 // This expression must be an integer type. 3065 if (!getType()->isIntegerType() || 3066 (Ctx.getLangOpts().CPlusPlus && getType()->isEnumeralType())) 3067 return NPCK_NotNull; 3068 3069 // If we have an integer constant expression, we need to *evaluate* it and 3070 // test for the value 0. Don't use the C++11 constant expression semantics 3071 // for this, for now; once the dust settles on core issue 903, we might only 3072 // allow a literal 0 here in C++11 mode. 3073 if (Ctx.getLangOpts().CPlusPlus11) { 3074 if (!isCXX98IntegralConstantExpr(Ctx)) 3075 return NPCK_NotNull; 3076 } else { 3077 if (!isIntegerConstantExpr(Ctx)) 3078 return NPCK_NotNull; 3079 } 3080 3081 if (EvaluateKnownConstInt(Ctx) != 0) 3082 return NPCK_NotNull; 3083 3084 if (isa<IntegerLiteral>(this)) 3085 return NPCK_ZeroLiteral; 3086 return NPCK_ZeroExpression; 3087 } 3088 3089 /// \brief If this expression is an l-value for an Objective C 3090 /// property, find the underlying property reference expression. 3091 const ObjCPropertyRefExpr *Expr::getObjCProperty() const { 3092 const Expr *E = this; 3093 while (true) { 3094 assert((E->getValueKind() == VK_LValue && 3095 E->getObjectKind() == OK_ObjCProperty) && 3096 "expression is not a property reference"); 3097 E = E->IgnoreParenCasts(); 3098 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) { 3099 if (BO->getOpcode() == BO_Comma) { 3100 E = BO->getRHS(); 3101 continue; 3102 } 3103 } 3104 3105 break; 3106 } 3107 3108 return cast<ObjCPropertyRefExpr>(E); 3109 } 3110 3111 bool Expr::isObjCSelfExpr() const { 3112 const Expr *E = IgnoreParenImpCasts(); 3113 3114 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E); 3115 if (!DRE) 3116 return false; 3117 3118 const ImplicitParamDecl *Param = dyn_cast<ImplicitParamDecl>(DRE->getDecl()); 3119 if (!Param) 3120 return false; 3121 3122 const ObjCMethodDecl *M = dyn_cast<ObjCMethodDecl>(Param->getDeclContext()); 3123 if (!M) 3124 return false; 3125 3126 return M->getSelfDecl() == Param; 3127 } 3128 3129 FieldDecl *Expr::getBitField() { 3130 Expr *E = this->IgnoreParens(); 3131 3132 while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) { 3133 if (ICE->getCastKind() == CK_LValueToRValue || 3134 (ICE->getValueKind() != VK_RValue && ICE->getCastKind() == CK_NoOp)) 3135 E = ICE->getSubExpr()->IgnoreParens(); 3136 else 3137 break; 3138 } 3139 3140 if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E)) 3141 if (FieldDecl *Field = dyn_cast<FieldDecl>(MemRef->getMemberDecl())) 3142 if (Field->isBitField()) 3143 return Field; 3144 3145 if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E)) 3146 if (FieldDecl *Field = dyn_cast<FieldDecl>(DeclRef->getDecl())) 3147 if (Field->isBitField()) 3148 return Field; 3149 3150 if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(E)) { 3151 if (BinOp->isAssignmentOp() && BinOp->getLHS()) 3152 return BinOp->getLHS()->getBitField(); 3153 3154 if (BinOp->getOpcode() == BO_Comma && BinOp->getRHS()) 3155 return BinOp->getRHS()->getBitField(); 3156 } 3157 3158 return 0; 3159 } 3160 3161 bool Expr::refersToVectorElement() const { 3162 const Expr *E = this->IgnoreParens(); 3163 3164 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) { 3165 if (ICE->getValueKind() != VK_RValue && 3166 ICE->getCastKind() == CK_NoOp) 3167 E = ICE->getSubExpr()->IgnoreParens(); 3168 else 3169 break; 3170 } 3171 3172 if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E)) 3173 return ASE->getBase()->getType()->isVectorType(); 3174 3175 if (isa<ExtVectorElementExpr>(E)) 3176 return true; 3177 3178 return false; 3179 } 3180 3181 /// isArrow - Return true if the base expression is a pointer to vector, 3182 /// return false if the base expression is a vector. 3183 bool ExtVectorElementExpr::isArrow() const { 3184 return getBase()->getType()->isPointerType(); 3185 } 3186 3187 unsigned ExtVectorElementExpr::getNumElements() const { 3188 if (const VectorType *VT = getType()->getAs<VectorType>()) 3189 return VT->getNumElements(); 3190 return 1; 3191 } 3192 3193 /// containsDuplicateElements - Return true if any element access is repeated. 3194 bool ExtVectorElementExpr::containsDuplicateElements() const { 3195 // FIXME: Refactor this code to an accessor on the AST node which returns the 3196 // "type" of component access, and share with code below and in Sema. 3197 StringRef Comp = Accessor->getName(); 3198 3199 // Halving swizzles do not contain duplicate elements. 3200 if (Comp == "hi" || Comp == "lo" || Comp == "even" || Comp == "odd") 3201 return false; 3202 3203 // Advance past s-char prefix on hex swizzles. 3204 if (Comp[0] == 's' || Comp[0] == 'S') 3205 Comp = Comp.substr(1); 3206 3207 for (unsigned i = 0, e = Comp.size(); i != e; ++i) 3208 if (Comp.substr(i + 1).find(Comp[i]) != StringRef::npos) 3209 return true; 3210 3211 return false; 3212 } 3213 3214 /// getEncodedElementAccess - We encode the fields as a llvm ConstantArray. 3215 void ExtVectorElementExpr::getEncodedElementAccess( 3216 SmallVectorImpl<unsigned> &Elts) const { 3217 StringRef Comp = Accessor->getName(); 3218 if (Comp[0] == 's' || Comp[0] == 'S') 3219 Comp = Comp.substr(1); 3220 3221 bool isHi = Comp == "hi"; 3222 bool isLo = Comp == "lo"; 3223 bool isEven = Comp == "even"; 3224 bool isOdd = Comp == "odd"; 3225 3226 for (unsigned i = 0, e = getNumElements(); i != e; ++i) { 3227 uint64_t Index; 3228 3229 if (isHi) 3230 Index = e + i; 3231 else if (isLo) 3232 Index = i; 3233 else if (isEven) 3234 Index = 2 * i; 3235 else if (isOdd) 3236 Index = 2 * i + 1; 3237 else 3238 Index = ExtVectorType::getAccessorIdx(Comp[i]); 3239 3240 Elts.push_back(Index); 3241 } 3242 } 3243 3244 ObjCMessageExpr::ObjCMessageExpr(QualType T, 3245 ExprValueKind VK, 3246 SourceLocation LBracLoc, 3247 SourceLocation SuperLoc, 3248 bool IsInstanceSuper, 3249 QualType SuperType, 3250 Selector Sel, 3251 ArrayRef<SourceLocation> SelLocs, 3252 SelectorLocationsKind SelLocsK, 3253 ObjCMethodDecl *Method, 3254 ArrayRef<Expr *> Args, 3255 SourceLocation RBracLoc, 3256 bool isImplicit) 3257 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary, 3258 /*TypeDependent=*/false, /*ValueDependent=*/false, 3259 /*InstantiationDependent=*/false, 3260 /*ContainsUnexpandedParameterPack=*/false), 3261 SelectorOrMethod(reinterpret_cast<uintptr_t>(Method? Method 3262 : Sel.getAsOpaquePtr())), 3263 Kind(IsInstanceSuper? SuperInstance : SuperClass), 3264 HasMethod(Method != 0), IsDelegateInitCall(false), IsImplicit(isImplicit), 3265 SuperLoc(SuperLoc), LBracLoc(LBracLoc), RBracLoc(RBracLoc) 3266 { 3267 initArgsAndSelLocs(Args, SelLocs, SelLocsK); 3268 setReceiverPointer(SuperType.getAsOpaquePtr()); 3269 } 3270 3271 ObjCMessageExpr::ObjCMessageExpr(QualType T, 3272 ExprValueKind VK, 3273 SourceLocation LBracLoc, 3274 TypeSourceInfo *Receiver, 3275 Selector Sel, 3276 ArrayRef<SourceLocation> SelLocs, 3277 SelectorLocationsKind SelLocsK, 3278 ObjCMethodDecl *Method, 3279 ArrayRef<Expr *> Args, 3280 SourceLocation RBracLoc, 3281 bool isImplicit) 3282 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary, T->isDependentType(), 3283 T->isDependentType(), T->isInstantiationDependentType(), 3284 T->containsUnexpandedParameterPack()), 3285 SelectorOrMethod(reinterpret_cast<uintptr_t>(Method? Method 3286 : Sel.getAsOpaquePtr())), 3287 Kind(Class), 3288 HasMethod(Method != 0), IsDelegateInitCall(false), IsImplicit(isImplicit), 3289 LBracLoc(LBracLoc), RBracLoc(RBracLoc) 3290 { 3291 initArgsAndSelLocs(Args, SelLocs, SelLocsK); 3292 setReceiverPointer(Receiver); 3293 } 3294 3295 ObjCMessageExpr::ObjCMessageExpr(QualType T, 3296 ExprValueKind VK, 3297 SourceLocation LBracLoc, 3298 Expr *Receiver, 3299 Selector Sel, 3300 ArrayRef<SourceLocation> SelLocs, 3301 SelectorLocationsKind SelLocsK, 3302 ObjCMethodDecl *Method, 3303 ArrayRef<Expr *> Args, 3304 SourceLocation RBracLoc, 3305 bool isImplicit) 3306 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary, Receiver->isTypeDependent(), 3307 Receiver->isTypeDependent(), 3308 Receiver->isInstantiationDependent(), 3309 Receiver->containsUnexpandedParameterPack()), 3310 SelectorOrMethod(reinterpret_cast<uintptr_t>(Method? Method 3311 : Sel.getAsOpaquePtr())), 3312 Kind(Instance), 3313 HasMethod(Method != 0), IsDelegateInitCall(false), IsImplicit(isImplicit), 3314 LBracLoc(LBracLoc), RBracLoc(RBracLoc) 3315 { 3316 initArgsAndSelLocs(Args, SelLocs, SelLocsK); 3317 setReceiverPointer(Receiver); 3318 } 3319 3320 void ObjCMessageExpr::initArgsAndSelLocs(ArrayRef<Expr *> Args, 3321 ArrayRef<SourceLocation> SelLocs, 3322 SelectorLocationsKind SelLocsK) { 3323 setNumArgs(Args.size()); 3324 Expr **MyArgs = getArgs(); 3325 for (unsigned I = 0; I != Args.size(); ++I) { 3326 if (Args[I]->isTypeDependent()) 3327 ExprBits.TypeDependent = true; 3328 if (Args[I]->isValueDependent()) 3329 ExprBits.ValueDependent = true; 3330 if (Args[I]->isInstantiationDependent()) 3331 ExprBits.InstantiationDependent = true; 3332 if (Args[I]->containsUnexpandedParameterPack()) 3333 ExprBits.ContainsUnexpandedParameterPack = true; 3334 3335 MyArgs[I] = Args[I]; 3336 } 3337 3338 SelLocsKind = SelLocsK; 3339 if (!isImplicit()) { 3340 if (SelLocsK == SelLoc_NonStandard) 3341 std::copy(SelLocs.begin(), SelLocs.end(), getStoredSelLocs()); 3342 } 3343 } 3344 3345 ObjCMessageExpr *ObjCMessageExpr::Create(ASTContext &Context, QualType T, 3346 ExprValueKind VK, 3347 SourceLocation LBracLoc, 3348 SourceLocation SuperLoc, 3349 bool IsInstanceSuper, 3350 QualType SuperType, 3351 Selector Sel, 3352 ArrayRef<SourceLocation> SelLocs, 3353 ObjCMethodDecl *Method, 3354 ArrayRef<Expr *> Args, 3355 SourceLocation RBracLoc, 3356 bool isImplicit) { 3357 assert((!SelLocs.empty() || isImplicit) && 3358 "No selector locs for non-implicit message"); 3359 ObjCMessageExpr *Mem; 3360 SelectorLocationsKind SelLocsK = SelectorLocationsKind(); 3361 if (isImplicit) 3362 Mem = alloc(Context, Args.size(), 0); 3363 else 3364 Mem = alloc(Context, Args, RBracLoc, SelLocs, Sel, SelLocsK); 3365 return new (Mem) ObjCMessageExpr(T, VK, LBracLoc, SuperLoc, IsInstanceSuper, 3366 SuperType, Sel, SelLocs, SelLocsK, 3367 Method, Args, RBracLoc, isImplicit); 3368 } 3369 3370 ObjCMessageExpr *ObjCMessageExpr::Create(ASTContext &Context, QualType T, 3371 ExprValueKind VK, 3372 SourceLocation LBracLoc, 3373 TypeSourceInfo *Receiver, 3374 Selector Sel, 3375 ArrayRef<SourceLocation> SelLocs, 3376 ObjCMethodDecl *Method, 3377 ArrayRef<Expr *> Args, 3378 SourceLocation RBracLoc, 3379 bool isImplicit) { 3380 assert((!SelLocs.empty() || isImplicit) && 3381 "No selector locs for non-implicit message"); 3382 ObjCMessageExpr *Mem; 3383 SelectorLocationsKind SelLocsK = SelectorLocationsKind(); 3384 if (isImplicit) 3385 Mem = alloc(Context, Args.size(), 0); 3386 else 3387 Mem = alloc(Context, Args, RBracLoc, SelLocs, Sel, SelLocsK); 3388 return new (Mem) ObjCMessageExpr(T, VK, LBracLoc, Receiver, Sel, 3389 SelLocs, SelLocsK, Method, Args, RBracLoc, 3390 isImplicit); 3391 } 3392 3393 ObjCMessageExpr *ObjCMessageExpr::Create(ASTContext &Context, QualType T, 3394 ExprValueKind VK, 3395 SourceLocation LBracLoc, 3396 Expr *Receiver, 3397 Selector Sel, 3398 ArrayRef<SourceLocation> SelLocs, 3399 ObjCMethodDecl *Method, 3400 ArrayRef<Expr *> Args, 3401 SourceLocation RBracLoc, 3402 bool isImplicit) { 3403 assert((!SelLocs.empty() || isImplicit) && 3404 "No selector locs for non-implicit message"); 3405 ObjCMessageExpr *Mem; 3406 SelectorLocationsKind SelLocsK = SelectorLocationsKind(); 3407 if (isImplicit) 3408 Mem = alloc(Context, Args.size(), 0); 3409 else 3410 Mem = alloc(Context, Args, RBracLoc, SelLocs, Sel, SelLocsK); 3411 return new (Mem) ObjCMessageExpr(T, VK, LBracLoc, Receiver, Sel, 3412 SelLocs, SelLocsK, Method, Args, RBracLoc, 3413 isImplicit); 3414 } 3415 3416 ObjCMessageExpr *ObjCMessageExpr::CreateEmpty(ASTContext &Context, 3417 unsigned NumArgs, 3418 unsigned NumStoredSelLocs) { 3419 ObjCMessageExpr *Mem = alloc(Context, NumArgs, NumStoredSelLocs); 3420 return new (Mem) ObjCMessageExpr(EmptyShell(), NumArgs); 3421 } 3422 3423 ObjCMessageExpr *ObjCMessageExpr::alloc(ASTContext &C, 3424 ArrayRef<Expr *> Args, 3425 SourceLocation RBraceLoc, 3426 ArrayRef<SourceLocation> SelLocs, 3427 Selector Sel, 3428 SelectorLocationsKind &SelLocsK) { 3429 SelLocsK = hasStandardSelectorLocs(Sel, SelLocs, Args, RBraceLoc); 3430 unsigned NumStoredSelLocs = (SelLocsK == SelLoc_NonStandard) ? SelLocs.size() 3431 : 0; 3432 return alloc(C, Args.size(), NumStoredSelLocs); 3433 } 3434 3435 ObjCMessageExpr *ObjCMessageExpr::alloc(ASTContext &C, 3436 unsigned NumArgs, 3437 unsigned NumStoredSelLocs) { 3438 unsigned Size = sizeof(ObjCMessageExpr) + sizeof(void *) + 3439 NumArgs * sizeof(Expr *) + NumStoredSelLocs * sizeof(SourceLocation); 3440 return (ObjCMessageExpr *)C.Allocate(Size, 3441 llvm::AlignOf<ObjCMessageExpr>::Alignment); 3442 } 3443 3444 void ObjCMessageExpr::getSelectorLocs( 3445 SmallVectorImpl<SourceLocation> &SelLocs) const { 3446 for (unsigned i = 0, e = getNumSelectorLocs(); i != e; ++i) 3447 SelLocs.push_back(getSelectorLoc(i)); 3448 } 3449 3450 SourceRange ObjCMessageExpr::getReceiverRange() const { 3451 switch (getReceiverKind()) { 3452 case Instance: 3453 return getInstanceReceiver()->getSourceRange(); 3454 3455 case Class: 3456 return getClassReceiverTypeInfo()->getTypeLoc().getSourceRange(); 3457 3458 case SuperInstance: 3459 case SuperClass: 3460 return getSuperLoc(); 3461 } 3462 3463 llvm_unreachable("Invalid ReceiverKind!"); 3464 } 3465 3466 Selector ObjCMessageExpr::getSelector() const { 3467 if (HasMethod) 3468 return reinterpret_cast<const ObjCMethodDecl *>(SelectorOrMethod) 3469 ->getSelector(); 3470 return Selector(SelectorOrMethod); 3471 } 3472 3473 QualType ObjCMessageExpr::getReceiverType() const { 3474 switch (getReceiverKind()) { 3475 case Instance: 3476 return getInstanceReceiver()->getType(); 3477 case Class: 3478 return getClassReceiver(); 3479 case SuperInstance: 3480 case SuperClass: 3481 return getSuperType(); 3482 } 3483 3484 llvm_unreachable("unexpected receiver kind"); 3485 } 3486 3487 ObjCInterfaceDecl *ObjCMessageExpr::getReceiverInterface() const { 3488 QualType T = getReceiverType(); 3489 3490 if (const ObjCObjectPointerType *Ptr = T->getAs<ObjCObjectPointerType>()) 3491 return Ptr->getInterfaceDecl(); 3492 3493 if (const ObjCObjectType *Ty = T->getAs<ObjCObjectType>()) 3494 return Ty->getInterface(); 3495 3496 return 0; 3497 } 3498 3499 StringRef ObjCBridgedCastExpr::getBridgeKindName() const { 3500 switch (getBridgeKind()) { 3501 case OBC_Bridge: 3502 return "__bridge"; 3503 case OBC_BridgeTransfer: 3504 return "__bridge_transfer"; 3505 case OBC_BridgeRetained: 3506 return "__bridge_retained"; 3507 } 3508 3509 llvm_unreachable("Invalid BridgeKind!"); 3510 } 3511 3512 bool ChooseExpr::isConditionTrue(const ASTContext &C) const { 3513 return getCond()->EvaluateKnownConstInt(C) != 0; 3514 } 3515 3516 ShuffleVectorExpr::ShuffleVectorExpr(ASTContext &C, ArrayRef<Expr*> args, 3517 QualType Type, SourceLocation BLoc, 3518 SourceLocation RP) 3519 : Expr(ShuffleVectorExprClass, Type, VK_RValue, OK_Ordinary, 3520 Type->isDependentType(), Type->isDependentType(), 3521 Type->isInstantiationDependentType(), 3522 Type->containsUnexpandedParameterPack()), 3523 BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(args.size()) 3524 { 3525 SubExprs = new (C) Stmt*[args.size()]; 3526 for (unsigned i = 0; i != args.size(); i++) { 3527 if (args[i]->isTypeDependent()) 3528 ExprBits.TypeDependent = true; 3529 if (args[i]->isValueDependent()) 3530 ExprBits.ValueDependent = true; 3531 if (args[i]->isInstantiationDependent()) 3532 ExprBits.InstantiationDependent = true; 3533 if (args[i]->containsUnexpandedParameterPack()) 3534 ExprBits.ContainsUnexpandedParameterPack = true; 3535 3536 SubExprs[i] = args[i]; 3537 } 3538 } 3539 3540 void ShuffleVectorExpr::setExprs(ASTContext &C, Expr ** Exprs, 3541 unsigned NumExprs) { 3542 if (SubExprs) C.Deallocate(SubExprs); 3543 3544 SubExprs = new (C) Stmt* [NumExprs]; 3545 this->NumExprs = NumExprs; 3546 memcpy(SubExprs, Exprs, sizeof(Expr *) * NumExprs); 3547 } 3548 3549 GenericSelectionExpr::GenericSelectionExpr(ASTContext &Context, 3550 SourceLocation GenericLoc, Expr *ControllingExpr, 3551 ArrayRef<TypeSourceInfo*> AssocTypes, 3552 ArrayRef<Expr*> AssocExprs, 3553 SourceLocation DefaultLoc, 3554 SourceLocation RParenLoc, 3555 bool ContainsUnexpandedParameterPack, 3556 unsigned ResultIndex) 3557 : Expr(GenericSelectionExprClass, 3558 AssocExprs[ResultIndex]->getType(), 3559 AssocExprs[ResultIndex]->getValueKind(), 3560 AssocExprs[ResultIndex]->getObjectKind(), 3561 AssocExprs[ResultIndex]->isTypeDependent(), 3562 AssocExprs[ResultIndex]->isValueDependent(), 3563 AssocExprs[ResultIndex]->isInstantiationDependent(), 3564 ContainsUnexpandedParameterPack), 3565 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]), 3566 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]), 3567 NumAssocs(AssocExprs.size()), ResultIndex(ResultIndex), 3568 GenericLoc(GenericLoc), DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) { 3569 SubExprs[CONTROLLING] = ControllingExpr; 3570 assert(AssocTypes.size() == AssocExprs.size()); 3571 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes); 3572 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR); 3573 } 3574 3575 GenericSelectionExpr::GenericSelectionExpr(ASTContext &Context, 3576 SourceLocation GenericLoc, Expr *ControllingExpr, 3577 ArrayRef<TypeSourceInfo*> AssocTypes, 3578 ArrayRef<Expr*> AssocExprs, 3579 SourceLocation DefaultLoc, 3580 SourceLocation RParenLoc, 3581 bool ContainsUnexpandedParameterPack) 3582 : Expr(GenericSelectionExprClass, 3583 Context.DependentTy, 3584 VK_RValue, 3585 OK_Ordinary, 3586 /*isTypeDependent=*/true, 3587 /*isValueDependent=*/true, 3588 /*isInstantiationDependent=*/true, 3589 ContainsUnexpandedParameterPack), 3590 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]), 3591 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]), 3592 NumAssocs(AssocExprs.size()), ResultIndex(-1U), GenericLoc(GenericLoc), 3593 DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) { 3594 SubExprs[CONTROLLING] = ControllingExpr; 3595 assert(AssocTypes.size() == AssocExprs.size()); 3596 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes); 3597 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR); 3598 } 3599 3600 //===----------------------------------------------------------------------===// 3601 // DesignatedInitExpr 3602 //===----------------------------------------------------------------------===// 3603 3604 IdentifierInfo *DesignatedInitExpr::Designator::getFieldName() const { 3605 assert(Kind == FieldDesignator && "Only valid on a field designator"); 3606 if (Field.NameOrField & 0x01) 3607 return reinterpret_cast<IdentifierInfo *>(Field.NameOrField&~0x01); 3608 else 3609 return getField()->getIdentifier(); 3610 } 3611 3612 DesignatedInitExpr::DesignatedInitExpr(ASTContext &C, QualType Ty, 3613 unsigned NumDesignators, 3614 const Designator *Designators, 3615 SourceLocation EqualOrColonLoc, 3616 bool GNUSyntax, 3617 ArrayRef<Expr*> IndexExprs, 3618 Expr *Init) 3619 : Expr(DesignatedInitExprClass, Ty, 3620 Init->getValueKind(), Init->getObjectKind(), 3621 Init->isTypeDependent(), Init->isValueDependent(), 3622 Init->isInstantiationDependent(), 3623 Init->containsUnexpandedParameterPack()), 3624 EqualOrColonLoc(EqualOrColonLoc), GNUSyntax(GNUSyntax), 3625 NumDesignators(NumDesignators), NumSubExprs(IndexExprs.size() + 1) { 3626 this->Designators = new (C) Designator[NumDesignators]; 3627 3628 // Record the initializer itself. 3629 child_range Child = children(); 3630 *Child++ = Init; 3631 3632 // Copy the designators and their subexpressions, computing 3633 // value-dependence along the way. 3634 unsigned IndexIdx = 0; 3635 for (unsigned I = 0; I != NumDesignators; ++I) { 3636 this->Designators[I] = Designators[I]; 3637 3638 if (this->Designators[I].isArrayDesignator()) { 3639 // Compute type- and value-dependence. 3640 Expr *Index = IndexExprs[IndexIdx]; 3641 if (Index->isTypeDependent() || Index->isValueDependent()) 3642 ExprBits.ValueDependent = true; 3643 if (Index->isInstantiationDependent()) 3644 ExprBits.InstantiationDependent = true; 3645 // Propagate unexpanded parameter packs. 3646 if (Index->containsUnexpandedParameterPack()) 3647 ExprBits.ContainsUnexpandedParameterPack = true; 3648 3649 // Copy the index expressions into permanent storage. 3650 *Child++ = IndexExprs[IndexIdx++]; 3651 } else if (this->Designators[I].isArrayRangeDesignator()) { 3652 // Compute type- and value-dependence. 3653 Expr *Start = IndexExprs[IndexIdx]; 3654 Expr *End = IndexExprs[IndexIdx + 1]; 3655 if (Start->isTypeDependent() || Start->isValueDependent() || 3656 End->isTypeDependent() || End->isValueDependent()) { 3657 ExprBits.ValueDependent = true; 3658 ExprBits.InstantiationDependent = true; 3659 } else if (Start->isInstantiationDependent() || 3660 End->isInstantiationDependent()) { 3661 ExprBits.InstantiationDependent = true; 3662 } 3663 3664 // Propagate unexpanded parameter packs. 3665 if (Start->containsUnexpandedParameterPack() || 3666 End->containsUnexpandedParameterPack()) 3667 ExprBits.ContainsUnexpandedParameterPack = true; 3668 3669 // Copy the start/end expressions into permanent storage. 3670 *Child++ = IndexExprs[IndexIdx++]; 3671 *Child++ = IndexExprs[IndexIdx++]; 3672 } 3673 } 3674 3675 assert(IndexIdx == IndexExprs.size() && "Wrong number of index expressions"); 3676 } 3677 3678 DesignatedInitExpr * 3679 DesignatedInitExpr::Create(ASTContext &C, Designator *Designators, 3680 unsigned NumDesignators, 3681 ArrayRef<Expr*> IndexExprs, 3682 SourceLocation ColonOrEqualLoc, 3683 bool UsesColonSyntax, Expr *Init) { 3684 void *Mem = C.Allocate(sizeof(DesignatedInitExpr) + 3685 sizeof(Stmt *) * (IndexExprs.size() + 1), 8); 3686 return new (Mem) DesignatedInitExpr(C, C.VoidTy, NumDesignators, Designators, 3687 ColonOrEqualLoc, UsesColonSyntax, 3688 IndexExprs, Init); 3689 } 3690 3691 DesignatedInitExpr *DesignatedInitExpr::CreateEmpty(ASTContext &C, 3692 unsigned NumIndexExprs) { 3693 void *Mem = C.Allocate(sizeof(DesignatedInitExpr) + 3694 sizeof(Stmt *) * (NumIndexExprs + 1), 8); 3695 return new (Mem) DesignatedInitExpr(NumIndexExprs + 1); 3696 } 3697 3698 void DesignatedInitExpr::setDesignators(ASTContext &C, 3699 const Designator *Desigs, 3700 unsigned NumDesigs) { 3701 Designators = new (C) Designator[NumDesigs]; 3702 NumDesignators = NumDesigs; 3703 for (unsigned I = 0; I != NumDesigs; ++I) 3704 Designators[I] = Desigs[I]; 3705 } 3706 3707 SourceRange DesignatedInitExpr::getDesignatorsSourceRange() const { 3708 DesignatedInitExpr *DIE = const_cast<DesignatedInitExpr*>(this); 3709 if (size() == 1) 3710 return DIE->getDesignator(0)->getSourceRange(); 3711 return SourceRange(DIE->getDesignator(0)->getLocStart(), 3712 DIE->getDesignator(size()-1)->getLocEnd()); 3713 } 3714 3715 SourceLocation DesignatedInitExpr::getLocStart() const { 3716 SourceLocation StartLoc; 3717 Designator &First = 3718 *const_cast<DesignatedInitExpr*>(this)->designators_begin(); 3719 if (First.isFieldDesignator()) { 3720 if (GNUSyntax) 3721 StartLoc = SourceLocation::getFromRawEncoding(First.Field.FieldLoc); 3722 else 3723 StartLoc = SourceLocation::getFromRawEncoding(First.Field.DotLoc); 3724 } else 3725 StartLoc = 3726 SourceLocation::getFromRawEncoding(First.ArrayOrRange.LBracketLoc); 3727 return StartLoc; 3728 } 3729 3730 SourceLocation DesignatedInitExpr::getLocEnd() const { 3731 return getInit()->getLocEnd(); 3732 } 3733 3734 Expr *DesignatedInitExpr::getArrayIndex(const Designator& D) const { 3735 assert(D.Kind == Designator::ArrayDesignator && "Requires array designator"); 3736 char *Ptr = static_cast<char *>( 3737 const_cast<void *>(static_cast<const void *>(this))); 3738 Ptr += sizeof(DesignatedInitExpr); 3739 Stmt **SubExprs = reinterpret_cast<Stmt**>(reinterpret_cast<void**>(Ptr)); 3740 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 1)); 3741 } 3742 3743 Expr *DesignatedInitExpr::getArrayRangeStart(const Designator &D) const { 3744 assert(D.Kind == Designator::ArrayRangeDesignator && 3745 "Requires array range designator"); 3746 char *Ptr = static_cast<char *>( 3747 const_cast<void *>(static_cast<const void *>(this))); 3748 Ptr += sizeof(DesignatedInitExpr); 3749 Stmt **SubExprs = reinterpret_cast<Stmt**>(reinterpret_cast<void**>(Ptr)); 3750 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 1)); 3751 } 3752 3753 Expr *DesignatedInitExpr::getArrayRangeEnd(const Designator &D) const { 3754 assert(D.Kind == Designator::ArrayRangeDesignator && 3755 "Requires array range designator"); 3756 char *Ptr = static_cast<char *>( 3757 const_cast<void *>(static_cast<const void *>(this))); 3758 Ptr += sizeof(DesignatedInitExpr); 3759 Stmt **SubExprs = reinterpret_cast<Stmt**>(reinterpret_cast<void**>(Ptr)); 3760 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 2)); 3761 } 3762 3763 /// \brief Replaces the designator at index @p Idx with the series 3764 /// of designators in [First, Last). 3765 void DesignatedInitExpr::ExpandDesignator(ASTContext &C, unsigned Idx, 3766 const Designator *First, 3767 const Designator *Last) { 3768 unsigned NumNewDesignators = Last - First; 3769 if (NumNewDesignators == 0) { 3770 std::copy_backward(Designators + Idx + 1, 3771 Designators + NumDesignators, 3772 Designators + Idx); 3773 --NumNewDesignators; 3774 return; 3775 } else if (NumNewDesignators == 1) { 3776 Designators[Idx] = *First; 3777 return; 3778 } 3779 3780 Designator *NewDesignators 3781 = new (C) Designator[NumDesignators - 1 + NumNewDesignators]; 3782 std::copy(Designators, Designators + Idx, NewDesignators); 3783 std::copy(First, Last, NewDesignators + Idx); 3784 std::copy(Designators + Idx + 1, Designators + NumDesignators, 3785 NewDesignators + Idx + NumNewDesignators); 3786 Designators = NewDesignators; 3787 NumDesignators = NumDesignators - 1 + NumNewDesignators; 3788 } 3789 3790 ParenListExpr::ParenListExpr(ASTContext& C, SourceLocation lparenloc, 3791 ArrayRef<Expr*> exprs, 3792 SourceLocation rparenloc) 3793 : Expr(ParenListExprClass, QualType(), VK_RValue, OK_Ordinary, 3794 false, false, false, false), 3795 NumExprs(exprs.size()), LParenLoc(lparenloc), RParenLoc(rparenloc) { 3796 Exprs = new (C) Stmt*[exprs.size()]; 3797 for (unsigned i = 0; i != exprs.size(); ++i) { 3798 if (exprs[i]->isTypeDependent()) 3799 ExprBits.TypeDependent = true; 3800 if (exprs[i]->isValueDependent()) 3801 ExprBits.ValueDependent = true; 3802 if (exprs[i]->isInstantiationDependent()) 3803 ExprBits.InstantiationDependent = true; 3804 if (exprs[i]->containsUnexpandedParameterPack()) 3805 ExprBits.ContainsUnexpandedParameterPack = true; 3806 3807 Exprs[i] = exprs[i]; 3808 } 3809 } 3810 3811 const OpaqueValueExpr *OpaqueValueExpr::findInCopyConstruct(const Expr *e) { 3812 if (const ExprWithCleanups *ewc = dyn_cast<ExprWithCleanups>(e)) 3813 e = ewc->getSubExpr(); 3814 if (const MaterializeTemporaryExpr *m = dyn_cast<MaterializeTemporaryExpr>(e)) 3815 e = m->GetTemporaryExpr(); 3816 e = cast<CXXConstructExpr>(e)->getArg(0); 3817 while (const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(e)) 3818 e = ice->getSubExpr(); 3819 return cast<OpaqueValueExpr>(e); 3820 } 3821 3822 PseudoObjectExpr *PseudoObjectExpr::Create(ASTContext &Context, EmptyShell sh, 3823 unsigned numSemanticExprs) { 3824 void *buffer = Context.Allocate(sizeof(PseudoObjectExpr) + 3825 (1 + numSemanticExprs) * sizeof(Expr*), 3826 llvm::alignOf<PseudoObjectExpr>()); 3827 return new(buffer) PseudoObjectExpr(sh, numSemanticExprs); 3828 } 3829 3830 PseudoObjectExpr::PseudoObjectExpr(EmptyShell shell, unsigned numSemanticExprs) 3831 : Expr(PseudoObjectExprClass, shell) { 3832 PseudoObjectExprBits.NumSubExprs = numSemanticExprs + 1; 3833 } 3834 3835 PseudoObjectExpr *PseudoObjectExpr::Create(ASTContext &C, Expr *syntax, 3836 ArrayRef<Expr*> semantics, 3837 unsigned resultIndex) { 3838 assert(syntax && "no syntactic expression!"); 3839 assert(semantics.size() && "no semantic expressions!"); 3840 3841 QualType type; 3842 ExprValueKind VK; 3843 if (resultIndex == NoResult) { 3844 type = C.VoidTy; 3845 VK = VK_RValue; 3846 } else { 3847 assert(resultIndex < semantics.size()); 3848 type = semantics[resultIndex]->getType(); 3849 VK = semantics[resultIndex]->getValueKind(); 3850 assert(semantics[resultIndex]->getObjectKind() == OK_Ordinary); 3851 } 3852 3853 void *buffer = C.Allocate(sizeof(PseudoObjectExpr) + 3854 (1 + semantics.size()) * sizeof(Expr*), 3855 llvm::alignOf<PseudoObjectExpr>()); 3856 return new(buffer) PseudoObjectExpr(type, VK, syntax, semantics, 3857 resultIndex); 3858 } 3859 3860 PseudoObjectExpr::PseudoObjectExpr(QualType type, ExprValueKind VK, 3861 Expr *syntax, ArrayRef<Expr*> semantics, 3862 unsigned resultIndex) 3863 : Expr(PseudoObjectExprClass, type, VK, OK_Ordinary, 3864 /*filled in at end of ctor*/ false, false, false, false) { 3865 PseudoObjectExprBits.NumSubExprs = semantics.size() + 1; 3866 PseudoObjectExprBits.ResultIndex = resultIndex + 1; 3867 3868 for (unsigned i = 0, e = semantics.size() + 1; i != e; ++i) { 3869 Expr *E = (i == 0 ? syntax : semantics[i-1]); 3870 getSubExprsBuffer()[i] = E; 3871 3872 if (E->isTypeDependent()) 3873 ExprBits.TypeDependent = true; 3874 if (E->isValueDependent()) 3875 ExprBits.ValueDependent = true; 3876 if (E->isInstantiationDependent()) 3877 ExprBits.InstantiationDependent = true; 3878 if (E->containsUnexpandedParameterPack()) 3879 ExprBits.ContainsUnexpandedParameterPack = true; 3880 3881 if (isa<OpaqueValueExpr>(E)) 3882 assert(cast<OpaqueValueExpr>(E)->getSourceExpr() != 0 && 3883 "opaque-value semantic expressions for pseudo-object " 3884 "operations must have sources"); 3885 } 3886 } 3887 3888 //===----------------------------------------------------------------------===// 3889 // ExprIterator. 3890 //===----------------------------------------------------------------------===// 3891 3892 Expr* ExprIterator::operator[](size_t idx) { return cast<Expr>(I[idx]); } 3893 Expr* ExprIterator::operator*() const { return cast<Expr>(*I); } 3894 Expr* ExprIterator::operator->() const { return cast<Expr>(*I); } 3895 const Expr* ConstExprIterator::operator[](size_t idx) const { 3896 return cast<Expr>(I[idx]); 3897 } 3898 const Expr* ConstExprIterator::operator*() const { return cast<Expr>(*I); } 3899 const Expr* ConstExprIterator::operator->() const { return cast<Expr>(*I); } 3900 3901 //===----------------------------------------------------------------------===// 3902 // Child Iterators for iterating over subexpressions/substatements 3903 //===----------------------------------------------------------------------===// 3904 3905 // UnaryExprOrTypeTraitExpr 3906 Stmt::child_range UnaryExprOrTypeTraitExpr::children() { 3907 // If this is of a type and the type is a VLA type (and not a typedef), the 3908 // size expression of the VLA needs to be treated as an executable expression. 3909 // Why isn't this weirdness documented better in StmtIterator? 3910 if (isArgumentType()) { 3911 if (const VariableArrayType* T = dyn_cast<VariableArrayType>( 3912 getArgumentType().getTypePtr())) 3913 return child_range(child_iterator(T), child_iterator()); 3914 return child_range(); 3915 } 3916 return child_range(&Argument.Ex, &Argument.Ex + 1); 3917 } 3918 3919 // ObjCMessageExpr 3920 Stmt::child_range ObjCMessageExpr::children() { 3921 Stmt **begin; 3922 if (getReceiverKind() == Instance) 3923 begin = reinterpret_cast<Stmt **>(this + 1); 3924 else 3925 begin = reinterpret_cast<Stmt **>(getArgs()); 3926 return child_range(begin, 3927 reinterpret_cast<Stmt **>(getArgs() + getNumArgs())); 3928 } 3929 3930 ObjCArrayLiteral::ObjCArrayLiteral(ArrayRef<Expr *> Elements, 3931 QualType T, ObjCMethodDecl *Method, 3932 SourceRange SR) 3933 : Expr(ObjCArrayLiteralClass, T, VK_RValue, OK_Ordinary, 3934 false, false, false, false), 3935 NumElements(Elements.size()), Range(SR), ArrayWithObjectsMethod(Method) 3936 { 3937 Expr **SaveElements = getElements(); 3938 for (unsigned I = 0, N = Elements.size(); I != N; ++I) { 3939 if (Elements[I]->isTypeDependent() || Elements[I]->isValueDependent()) 3940 ExprBits.ValueDependent = true; 3941 if (Elements[I]->isInstantiationDependent()) 3942 ExprBits.InstantiationDependent = true; 3943 if (Elements[I]->containsUnexpandedParameterPack()) 3944 ExprBits.ContainsUnexpandedParameterPack = true; 3945 3946 SaveElements[I] = Elements[I]; 3947 } 3948 } 3949 3950 ObjCArrayLiteral *ObjCArrayLiteral::Create(ASTContext &C, 3951 ArrayRef<Expr *> Elements, 3952 QualType T, ObjCMethodDecl * Method, 3953 SourceRange SR) { 3954 void *Mem = C.Allocate(sizeof(ObjCArrayLiteral) 3955 + Elements.size() * sizeof(Expr *)); 3956 return new (Mem) ObjCArrayLiteral(Elements, T, Method, SR); 3957 } 3958 3959 ObjCArrayLiteral *ObjCArrayLiteral::CreateEmpty(ASTContext &C, 3960 unsigned NumElements) { 3961 3962 void *Mem = C.Allocate(sizeof(ObjCArrayLiteral) 3963 + NumElements * sizeof(Expr *)); 3964 return new (Mem) ObjCArrayLiteral(EmptyShell(), NumElements); 3965 } 3966 3967 ObjCDictionaryLiteral::ObjCDictionaryLiteral( 3968 ArrayRef<ObjCDictionaryElement> VK, 3969 bool HasPackExpansions, 3970 QualType T, ObjCMethodDecl *method, 3971 SourceRange SR) 3972 : Expr(ObjCDictionaryLiteralClass, T, VK_RValue, OK_Ordinary, false, false, 3973 false, false), 3974 NumElements(VK.size()), HasPackExpansions(HasPackExpansions), Range(SR), 3975 DictWithObjectsMethod(method) 3976 { 3977 KeyValuePair *KeyValues = getKeyValues(); 3978 ExpansionData *Expansions = getExpansionData(); 3979 for (unsigned I = 0; I < NumElements; I++) { 3980 if (VK[I].Key->isTypeDependent() || VK[I].Key->isValueDependent() || 3981 VK[I].Value->isTypeDependent() || VK[I].Value->isValueDependent()) 3982 ExprBits.ValueDependent = true; 3983 if (VK[I].Key->isInstantiationDependent() || 3984 VK[I].Value->isInstantiationDependent()) 3985 ExprBits.InstantiationDependent = true; 3986 if (VK[I].EllipsisLoc.isInvalid() && 3987 (VK[I].Key->containsUnexpandedParameterPack() || 3988 VK[I].Value->containsUnexpandedParameterPack())) 3989 ExprBits.ContainsUnexpandedParameterPack = true; 3990 3991 KeyValues[I].Key = VK[I].Key; 3992 KeyValues[I].Value = VK[I].Value; 3993 if (Expansions) { 3994 Expansions[I].EllipsisLoc = VK[I].EllipsisLoc; 3995 if (VK[I].NumExpansions) 3996 Expansions[I].NumExpansionsPlusOne = *VK[I].NumExpansions + 1; 3997 else 3998 Expansions[I].NumExpansionsPlusOne = 0; 3999 } 4000 } 4001 } 4002 4003 ObjCDictionaryLiteral * 4004 ObjCDictionaryLiteral::Create(ASTContext &C, 4005 ArrayRef<ObjCDictionaryElement> VK, 4006 bool HasPackExpansions, 4007 QualType T, ObjCMethodDecl *method, 4008 SourceRange SR) { 4009 unsigned ExpansionsSize = 0; 4010 if (HasPackExpansions) 4011 ExpansionsSize = sizeof(ExpansionData) * VK.size(); 4012 4013 void *Mem = C.Allocate(sizeof(ObjCDictionaryLiteral) + 4014 sizeof(KeyValuePair) * VK.size() + ExpansionsSize); 4015 return new (Mem) ObjCDictionaryLiteral(VK, HasPackExpansions, T, method, SR); 4016 } 4017 4018 ObjCDictionaryLiteral * 4019 ObjCDictionaryLiteral::CreateEmpty(ASTContext &C, unsigned NumElements, 4020 bool HasPackExpansions) { 4021 unsigned ExpansionsSize = 0; 4022 if (HasPackExpansions) 4023 ExpansionsSize = sizeof(ExpansionData) * NumElements; 4024 void *Mem = C.Allocate(sizeof(ObjCDictionaryLiteral) + 4025 sizeof(KeyValuePair) * NumElements + ExpansionsSize); 4026 return new (Mem) ObjCDictionaryLiteral(EmptyShell(), NumElements, 4027 HasPackExpansions); 4028 } 4029 4030 ObjCSubscriptRefExpr *ObjCSubscriptRefExpr::Create(ASTContext &C, 4031 Expr *base, 4032 Expr *key, QualType T, 4033 ObjCMethodDecl *getMethod, 4034 ObjCMethodDecl *setMethod, 4035 SourceLocation RB) { 4036 void *Mem = C.Allocate(sizeof(ObjCSubscriptRefExpr)); 4037 return new (Mem) ObjCSubscriptRefExpr(base, key, T, VK_LValue, 4038 OK_ObjCSubscript, 4039 getMethod, setMethod, RB); 4040 } 4041 4042 AtomicExpr::AtomicExpr(SourceLocation BLoc, ArrayRef<Expr*> args, 4043 QualType t, AtomicOp op, SourceLocation RP) 4044 : Expr(AtomicExprClass, t, VK_RValue, OK_Ordinary, 4045 false, false, false, false), 4046 NumSubExprs(args.size()), BuiltinLoc(BLoc), RParenLoc(RP), Op(op) 4047 { 4048 assert(args.size() == getNumSubExprs(op) && "wrong number of subexpressions"); 4049 for (unsigned i = 0; i != args.size(); i++) { 4050 if (args[i]->isTypeDependent()) 4051 ExprBits.TypeDependent = true; 4052 if (args[i]->isValueDependent()) 4053 ExprBits.ValueDependent = true; 4054 if (args[i]->isInstantiationDependent()) 4055 ExprBits.InstantiationDependent = true; 4056 if (args[i]->containsUnexpandedParameterPack()) 4057 ExprBits.ContainsUnexpandedParameterPack = true; 4058 4059 SubExprs[i] = args[i]; 4060 } 4061 } 4062 4063 unsigned AtomicExpr::getNumSubExprs(AtomicOp Op) { 4064 switch (Op) { 4065 case AO__c11_atomic_init: 4066 case AO__c11_atomic_load: 4067 case AO__atomic_load_n: 4068 return 2; 4069 4070 case AO__c11_atomic_store: 4071 case AO__c11_atomic_exchange: 4072 case AO__atomic_load: 4073 case AO__atomic_store: 4074 case AO__atomic_store_n: 4075 case AO__atomic_exchange_n: 4076 case AO__c11_atomic_fetch_add: 4077 case AO__c11_atomic_fetch_sub: 4078 case AO__c11_atomic_fetch_and: 4079 case AO__c11_atomic_fetch_or: 4080 case AO__c11_atomic_fetch_xor: 4081 case AO__atomic_fetch_add: 4082 case AO__atomic_fetch_sub: 4083 case AO__atomic_fetch_and: 4084 case AO__atomic_fetch_or: 4085 case AO__atomic_fetch_xor: 4086 case AO__atomic_fetch_nand: 4087 case AO__atomic_add_fetch: 4088 case AO__atomic_sub_fetch: 4089 case AO__atomic_and_fetch: 4090 case AO__atomic_or_fetch: 4091 case AO__atomic_xor_fetch: 4092 case AO__atomic_nand_fetch: 4093 return 3; 4094 4095 case AO__atomic_exchange: 4096 return 4; 4097 4098 case AO__c11_atomic_compare_exchange_strong: 4099 case AO__c11_atomic_compare_exchange_weak: 4100 return 5; 4101 4102 case AO__atomic_compare_exchange: 4103 case AO__atomic_compare_exchange_n: 4104 return 6; 4105 } 4106 llvm_unreachable("unknown atomic op"); 4107 } 4108