1 //===--- Expr.cpp - Expression AST Node Implementation --------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the Expr class and subclasses.
12 //===----------------------------------------------------------------------===//
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/Mangle.h"
24 #include "clang/AST/RecordLayout.h"
25 #include "clang/AST/StmtVisitor.h"
26 #include "clang/Basic/Builtins.h"
27 #include "clang/Basic/CharInfo.h"
28 #include "clang/Basic/SourceManager.h"
29 #include "clang/Basic/TargetInfo.h"
30 #include "clang/Lex/Lexer.h"
31 #include "clang/Lex/LiteralSupport.h"
32 #include "clang/Sema/SemaDiagnostic.h"
33 #include "llvm/Support/ErrorHandling.h"
34 #include "llvm/Support/raw_ostream.h"
37 using namespace clang;
39 const CXXRecordDecl *Expr::getBestDynamicClassType() const {
40 const Expr *E = ignoreParenBaseCasts();
42 QualType DerivedType = E->getType();
43 if (const PointerType *PTy = DerivedType->getAs<PointerType>())
44 DerivedType = PTy->getPointeeType();
46 if (DerivedType->isDependentType())
49 const RecordType *Ty = DerivedType->castAs<RecordType>();
50 Decl *D = Ty->getDecl();
51 return cast<CXXRecordDecl>(D);
54 const Expr *Expr::skipRValueSubobjectAdjustments(
55 SmallVectorImpl<const Expr *> &CommaLHSs,
56 SmallVectorImpl<SubobjectAdjustment> &Adjustments) const {
59 E = E->IgnoreParens();
61 if (const CastExpr *CE = dyn_cast<CastExpr>(E)) {
62 if ((CE->getCastKind() == CK_DerivedToBase ||
63 CE->getCastKind() == CK_UncheckedDerivedToBase) &&
64 E->getType()->isRecordType()) {
66 CXXRecordDecl *Derived
67 = cast<CXXRecordDecl>(E->getType()->getAs<RecordType>()->getDecl());
68 Adjustments.push_back(SubobjectAdjustment(CE, Derived));
72 if (CE->getCastKind() == CK_NoOp) {
76 } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) {
78 assert(ME->getBase()->getType()->isRecordType());
79 if (FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl())) {
80 if (!Field->isBitField() && !Field->getType()->isReferenceType()) {
82 Adjustments.push_back(SubobjectAdjustment(Field));
87 } else if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
88 if (BO->isPtrMemOp()) {
89 assert(BO->getRHS()->isRValue());
91 const MemberPointerType *MPT =
92 BO->getRHS()->getType()->getAs<MemberPointerType>();
93 Adjustments.push_back(SubobjectAdjustment(MPT, BO->getRHS()));
95 } else if (BO->getOpcode() == BO_Comma) {
96 CommaLHSs.push_back(BO->getLHS());
109 Expr::findMaterializedTemporary(const MaterializeTemporaryExpr *&MTE) const {
110 const Expr *E = this;
112 // This might be a default initializer for a reference member. Walk over the
113 // wrapper node for that.
114 if (const CXXDefaultInitExpr *DAE = dyn_cast<CXXDefaultInitExpr>(E))
117 // Look through single-element init lists that claim to be lvalues. They're
118 // just syntactic wrappers in this case.
119 if (const InitListExpr *ILE = dyn_cast<InitListExpr>(E)) {
120 if (ILE->getNumInits() == 1 && ILE->isGLValue()) {
122 if (const CXXDefaultInitExpr *DAE = dyn_cast<CXXDefaultInitExpr>(E))
127 // Look through expressions for materialized temporaries (for now).
128 if (const MaterializeTemporaryExpr *M
129 = dyn_cast<MaterializeTemporaryExpr>(E)) {
131 E = M->GetTemporaryExpr();
134 if (const CXXDefaultArgExpr *DAE = dyn_cast<CXXDefaultArgExpr>(E))
139 /// isKnownToHaveBooleanValue - Return true if this is an integer expression
140 /// that is known to return 0 or 1. This happens for _Bool/bool expressions
141 /// but also int expressions which are produced by things like comparisons in
143 bool Expr::isKnownToHaveBooleanValue() const {
144 const Expr *E = IgnoreParens();
146 // If this value has _Bool type, it is obvious 0/1.
147 if (E->getType()->isBooleanType()) return true;
148 // If this is a non-scalar-integer type, we don't care enough to try.
149 if (!E->getType()->isIntegralOrEnumerationType()) return false;
151 if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
152 switch (UO->getOpcode()) {
154 return UO->getSubExpr()->isKnownToHaveBooleanValue();
160 // Only look through implicit casts. If the user writes
161 // '(int) (a && b)' treat it as an arbitrary int.
162 if (const ImplicitCastExpr *CE = dyn_cast<ImplicitCastExpr>(E))
163 return CE->getSubExpr()->isKnownToHaveBooleanValue();
165 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
166 switch (BO->getOpcode()) {
167 default: return false;
168 case BO_LT: // Relational operators.
172 case BO_EQ: // Equality operators.
174 case BO_LAnd: // AND operator.
175 case BO_LOr: // Logical OR operator.
178 case BO_And: // Bitwise AND operator.
179 case BO_Xor: // Bitwise XOR operator.
180 case BO_Or: // Bitwise OR operator.
181 // Handle things like (x==2)|(y==12).
182 return BO->getLHS()->isKnownToHaveBooleanValue() &&
183 BO->getRHS()->isKnownToHaveBooleanValue();
187 return BO->getRHS()->isKnownToHaveBooleanValue();
191 if (const ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E))
192 return CO->getTrueExpr()->isKnownToHaveBooleanValue() &&
193 CO->getFalseExpr()->isKnownToHaveBooleanValue();
198 // Amusing macro metaprogramming hack: check whether a class provides
199 // a more specific implementation of getExprLoc().
201 // See also Stmt.cpp:{getLocStart(),getLocEnd()}.
203 /// This implementation is used when a class provides a custom
204 /// implementation of getExprLoc.
205 template <class E, class T>
206 SourceLocation getExprLocImpl(const Expr *expr,
207 SourceLocation (T::*v)() const) {
208 return static_cast<const E*>(expr)->getExprLoc();
211 /// This implementation is used when a class doesn't provide
212 /// a custom implementation of getExprLoc. Overload resolution
213 /// should pick it over the implementation above because it's
214 /// more specialized according to function template partial ordering.
216 SourceLocation getExprLocImpl(const Expr *expr,
217 SourceLocation (Expr::*v)() const) {
218 return static_cast<const E*>(expr)->getLocStart();
222 SourceLocation Expr::getExprLoc() const {
223 switch (getStmtClass()) {
224 case Stmt::NoStmtClass: llvm_unreachable("statement without class");
225 #define ABSTRACT_STMT(type)
226 #define STMT(type, base) \
227 case Stmt::type##Class: llvm_unreachable(#type " is not an Expr"); break;
228 #define EXPR(type, base) \
229 case Stmt::type##Class: return getExprLocImpl<type>(this, &type::getExprLoc);
230 #include "clang/AST/StmtNodes.inc"
232 llvm_unreachable("unknown statement kind");
235 //===----------------------------------------------------------------------===//
236 // Primary Expressions.
237 //===----------------------------------------------------------------------===//
239 /// \brief Compute the type-, value-, and instantiation-dependence of a
240 /// declaration reference
241 /// based on the declaration being referenced.
242 static void computeDeclRefDependence(const ASTContext &Ctx, NamedDecl *D,
243 QualType T, bool &TypeDependent,
244 bool &ValueDependent,
245 bool &InstantiationDependent) {
246 TypeDependent = false;
247 ValueDependent = false;
248 InstantiationDependent = false;
250 // (TD) C++ [temp.dep.expr]p3:
251 // An id-expression is type-dependent if it contains:
255 // (VD) C++ [temp.dep.constexpr]p2:
256 // An identifier is value-dependent if it is:
258 // (TD) - an identifier that was declared with dependent type
259 // (VD) - a name declared with a dependent type,
260 if (T->isDependentType()) {
261 TypeDependent = true;
262 ValueDependent = true;
263 InstantiationDependent = true;
265 } else if (T->isInstantiationDependentType()) {
266 InstantiationDependent = true;
269 // (TD) - a conversion-function-id that specifies a dependent type
270 if (D->getDeclName().getNameKind()
271 == DeclarationName::CXXConversionFunctionName) {
272 QualType T = D->getDeclName().getCXXNameType();
273 if (T->isDependentType()) {
274 TypeDependent = true;
275 ValueDependent = true;
276 InstantiationDependent = true;
280 if (T->isInstantiationDependentType())
281 InstantiationDependent = true;
284 // (VD) - the name of a non-type template parameter,
285 if (isa<NonTypeTemplateParmDecl>(D)) {
286 ValueDependent = true;
287 InstantiationDependent = true;
291 // (VD) - a constant with integral or enumeration type and is
292 // initialized with an expression that is value-dependent.
293 // (VD) - a constant with literal type and is initialized with an
294 // expression that is value-dependent [C++11].
295 // (VD) - FIXME: Missing from the standard:
296 // - an entity with reference type and is initialized with an
297 // expression that is value-dependent [C++11]
298 if (VarDecl *Var = dyn_cast<VarDecl>(D)) {
299 if ((Ctx.getLangOpts().CPlusPlus11 ?
300 Var->getType()->isLiteralType(Ctx) :
301 Var->getType()->isIntegralOrEnumerationType()) &&
302 (Var->getType().isConstQualified() ||
303 Var->getType()->isReferenceType())) {
304 if (const Expr *Init = Var->getAnyInitializer())
305 if (Init->isValueDependent()) {
306 ValueDependent = true;
307 InstantiationDependent = true;
311 // (VD) - FIXME: Missing from the standard:
312 // - a member function or a static data member of the current
314 if (Var->isStaticDataMember() &&
315 Var->getDeclContext()->isDependentContext()) {
316 ValueDependent = true;
317 InstantiationDependent = true;
318 TypeSourceInfo *TInfo = Var->getFirstDecl()->getTypeSourceInfo();
319 if (TInfo->getType()->isIncompleteArrayType())
320 TypeDependent = true;
326 // (VD) - FIXME: Missing from the standard:
327 // - a member function or a static data member of the current
329 if (isa<CXXMethodDecl>(D) && D->getDeclContext()->isDependentContext()) {
330 ValueDependent = true;
331 InstantiationDependent = true;
335 void DeclRefExpr::computeDependence(const ASTContext &Ctx) {
336 bool TypeDependent = false;
337 bool ValueDependent = false;
338 bool InstantiationDependent = false;
339 computeDeclRefDependence(Ctx, getDecl(), getType(), TypeDependent,
340 ValueDependent, InstantiationDependent);
342 // (TD) C++ [temp.dep.expr]p3:
343 // An id-expression is type-dependent if it contains:
347 // (VD) C++ [temp.dep.constexpr]p2:
348 // An identifier is value-dependent if it is:
349 if (!TypeDependent && !ValueDependent &&
350 hasExplicitTemplateArgs() &&
351 TemplateSpecializationType::anyDependentTemplateArguments(
353 getNumTemplateArgs(),
354 InstantiationDependent)) {
355 TypeDependent = true;
356 ValueDependent = true;
357 InstantiationDependent = true;
360 ExprBits.TypeDependent = TypeDependent;
361 ExprBits.ValueDependent = ValueDependent;
362 ExprBits.InstantiationDependent = InstantiationDependent;
364 // Is the declaration a parameter pack?
365 if (getDecl()->isParameterPack())
366 ExprBits.ContainsUnexpandedParameterPack = true;
369 DeclRefExpr::DeclRefExpr(const ASTContext &Ctx,
370 NestedNameSpecifierLoc QualifierLoc,
371 SourceLocation TemplateKWLoc,
372 ValueDecl *D, bool RefersToEnclosingLocal,
373 const DeclarationNameInfo &NameInfo,
375 const TemplateArgumentListInfo *TemplateArgs,
376 QualType T, ExprValueKind VK)
377 : Expr(DeclRefExprClass, T, VK, OK_Ordinary, false, false, false, false),
378 D(D), Loc(NameInfo.getLoc()), DNLoc(NameInfo.getInfo()) {
379 DeclRefExprBits.HasQualifier = QualifierLoc ? 1 : 0;
381 getInternalQualifierLoc() = QualifierLoc;
382 DeclRefExprBits.HasFoundDecl = FoundD ? 1 : 0;
384 getInternalFoundDecl() = FoundD;
385 DeclRefExprBits.HasTemplateKWAndArgsInfo
386 = (TemplateArgs || TemplateKWLoc.isValid()) ? 1 : 0;
387 DeclRefExprBits.RefersToEnclosingLocal = RefersToEnclosingLocal;
389 bool Dependent = false;
390 bool InstantiationDependent = false;
391 bool ContainsUnexpandedParameterPack = false;
392 getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc, *TemplateArgs,
394 InstantiationDependent,
395 ContainsUnexpandedParameterPack);
396 if (InstantiationDependent)
397 setInstantiationDependent(true);
398 } else if (TemplateKWLoc.isValid()) {
399 getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc);
401 DeclRefExprBits.HadMultipleCandidates = 0;
403 computeDependence(Ctx);
406 DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
407 NestedNameSpecifierLoc QualifierLoc,
408 SourceLocation TemplateKWLoc,
410 bool RefersToEnclosingLocal,
411 SourceLocation NameLoc,
415 const TemplateArgumentListInfo *TemplateArgs) {
416 return Create(Context, QualifierLoc, TemplateKWLoc, D,
417 RefersToEnclosingLocal,
418 DeclarationNameInfo(D->getDeclName(), NameLoc),
419 T, VK, FoundD, TemplateArgs);
422 DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
423 NestedNameSpecifierLoc QualifierLoc,
424 SourceLocation TemplateKWLoc,
426 bool RefersToEnclosingLocal,
427 const DeclarationNameInfo &NameInfo,
431 const TemplateArgumentListInfo *TemplateArgs) {
432 // Filter out cases where the found Decl is the same as the value refenenced.
436 std::size_t Size = sizeof(DeclRefExpr);
438 Size += sizeof(NestedNameSpecifierLoc);
440 Size += sizeof(NamedDecl *);
442 Size += ASTTemplateKWAndArgsInfo::sizeFor(TemplateArgs->size());
443 else if (TemplateKWLoc.isValid())
444 Size += ASTTemplateKWAndArgsInfo::sizeFor(0);
446 void *Mem = Context.Allocate(Size, llvm::alignOf<DeclRefExpr>());
447 return new (Mem) DeclRefExpr(Context, QualifierLoc, TemplateKWLoc, D,
448 RefersToEnclosingLocal,
449 NameInfo, FoundD, TemplateArgs, T, VK);
452 DeclRefExpr *DeclRefExpr::CreateEmpty(const ASTContext &Context,
455 bool HasTemplateKWAndArgsInfo,
456 unsigned NumTemplateArgs) {
457 std::size_t Size = sizeof(DeclRefExpr);
459 Size += sizeof(NestedNameSpecifierLoc);
461 Size += sizeof(NamedDecl *);
462 if (HasTemplateKWAndArgsInfo)
463 Size += ASTTemplateKWAndArgsInfo::sizeFor(NumTemplateArgs);
465 void *Mem = Context.Allocate(Size, llvm::alignOf<DeclRefExpr>());
466 return new (Mem) DeclRefExpr(EmptyShell());
469 SourceLocation DeclRefExpr::getLocStart() const {
471 return getQualifierLoc().getBeginLoc();
472 return getNameInfo().getLocStart();
474 SourceLocation DeclRefExpr::getLocEnd() const {
475 if (hasExplicitTemplateArgs())
476 return getRAngleLoc();
477 return getNameInfo().getLocEnd();
480 // FIXME: Maybe this should use DeclPrinter with a special "print predefined
481 // expr" policy instead.
482 std::string PredefinedExpr::ComputeName(IdentType IT, const Decl *CurrentDecl) {
483 ASTContext &Context = CurrentDecl->getASTContext();
485 if (IT == PredefinedExpr::FuncDName) {
486 if (const NamedDecl *ND = dyn_cast<NamedDecl>(CurrentDecl)) {
487 OwningPtr<MangleContext> MC;
488 MC.reset(Context.createMangleContext());
490 if (MC->shouldMangleDeclName(ND)) {
491 SmallString<256> Buffer;
492 llvm::raw_svector_ostream Out(Buffer);
493 if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(ND))
494 MC->mangleCXXCtor(CD, Ctor_Base, Out);
495 else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(ND))
496 MC->mangleCXXDtor(DD, Dtor_Base, Out);
498 MC->mangleName(ND, Out);
501 if (!Buffer.empty() && Buffer.front() == '\01')
502 return Buffer.substr(1);
505 return ND->getIdentifier()->getName();
509 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(CurrentDecl)) {
510 if (IT != PrettyFunction && IT != PrettyFunctionNoVirtual)
511 return FD->getNameAsString();
513 SmallString<256> Name;
514 llvm::raw_svector_ostream Out(Name);
516 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
517 if (MD->isVirtual() && IT != PrettyFunctionNoVirtual)
523 PrintingPolicy Policy(Context.getLangOpts());
525 llvm::raw_string_ostream POut(Proto);
526 FD->printQualifiedName(POut, Policy);
528 const FunctionDecl *Decl = FD;
529 if (const FunctionDecl* Pattern = FD->getTemplateInstantiationPattern())
531 const FunctionType *AFT = Decl->getType()->getAs<FunctionType>();
532 const FunctionProtoType *FT = 0;
533 if (FD->hasWrittenPrototype())
534 FT = dyn_cast<FunctionProtoType>(AFT);
538 for (unsigned i = 0, e = Decl->getNumParams(); i != e; ++i) {
540 POut << Decl->getParamDecl(i)->getType().stream(Policy);
543 if (FT->isVariadic()) {
544 if (FD->getNumParams()) POut << ", ";
550 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
551 const FunctionType *FT = MD->getType()->castAs<FunctionType>();
554 if (FT->isVolatile())
556 RefQualifierKind Ref = MD->getRefQualifier();
557 if (Ref == RQ_LValue)
559 else if (Ref == RQ_RValue)
563 typedef SmallVector<const ClassTemplateSpecializationDecl *, 8> SpecsTy;
565 const DeclContext *Ctx = FD->getDeclContext();
566 while (Ctx && isa<NamedDecl>(Ctx)) {
567 const ClassTemplateSpecializationDecl *Spec
568 = dyn_cast<ClassTemplateSpecializationDecl>(Ctx);
569 if (Spec && !Spec->isExplicitSpecialization())
570 Specs.push_back(Spec);
571 Ctx = Ctx->getParent();
574 std::string TemplateParams;
575 llvm::raw_string_ostream TOut(TemplateParams);
576 for (SpecsTy::reverse_iterator I = Specs.rbegin(), E = Specs.rend();
578 const TemplateParameterList *Params
579 = (*I)->getSpecializedTemplate()->getTemplateParameters();
580 const TemplateArgumentList &Args = (*I)->getTemplateArgs();
581 assert(Params->size() == Args.size());
582 for (unsigned i = 0, numParams = Params->size(); i != numParams; ++i) {
583 StringRef Param = Params->getParam(i)->getName();
584 if (Param.empty()) continue;
585 TOut << Param << " = ";
586 Args.get(i).print(Policy, TOut);
591 FunctionTemplateSpecializationInfo *FSI
592 = FD->getTemplateSpecializationInfo();
593 if (FSI && !FSI->isExplicitSpecialization()) {
594 const TemplateParameterList* Params
595 = FSI->getTemplate()->getTemplateParameters();
596 const TemplateArgumentList* Args = FSI->TemplateArguments;
597 assert(Params->size() == Args->size());
598 for (unsigned i = 0, e = Params->size(); i != e; ++i) {
599 StringRef Param = Params->getParam(i)->getName();
600 if (Param.empty()) continue;
601 TOut << Param << " = ";
602 Args->get(i).print(Policy, TOut);
608 if (!TemplateParams.empty()) {
609 // remove the trailing comma and space
610 TemplateParams.resize(TemplateParams.size() - 2);
611 POut << " [" << TemplateParams << "]";
616 // Print "auto" for all deduced return types. This includes C++1y return
617 // type deduction and lambdas. For trailing return types resolve the
618 // decltype expression. Otherwise print the real type when this is
619 // not a constructor or destructor.
620 if ((isa<CXXMethodDecl>(FD) &&
621 cast<CXXMethodDecl>(FD)->getParent()->isLambda()) ||
622 (FT && FT->getResultType()->getAs<AutoType>()))
623 Proto = "auto " + Proto;
624 else if (FT && FT->getResultType()->getAs<DecltypeType>())
625 FT->getResultType()->getAs<DecltypeType>()->getUnderlyingType()
626 .getAsStringInternal(Proto, Policy);
627 else if (!isa<CXXConstructorDecl>(FD) && !isa<CXXDestructorDecl>(FD))
628 AFT->getResultType().getAsStringInternal(Proto, Policy);
633 return Name.str().str();
635 if (const CapturedDecl *CD = dyn_cast<CapturedDecl>(CurrentDecl)) {
636 for (const DeclContext *DC = CD->getParent(); DC; DC = DC->getParent())
637 // Skip to its enclosing function or method, but not its enclosing
639 if (DC->isFunctionOrMethod() && (DC->getDeclKind() != Decl::Captured)) {
640 const Decl *D = Decl::castFromDeclContext(DC);
641 return ComputeName(IT, D);
643 llvm_unreachable("CapturedDecl not inside a function or method");
645 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(CurrentDecl)) {
646 SmallString<256> Name;
647 llvm::raw_svector_ostream Out(Name);
648 Out << (MD->isInstanceMethod() ? '-' : '+');
651 // For incorrect code, there might not be an ObjCInterfaceDecl. Do
652 // a null check to avoid a crash.
653 if (const ObjCInterfaceDecl *ID = MD->getClassInterface())
656 if (const ObjCCategoryImplDecl *CID =
657 dyn_cast<ObjCCategoryImplDecl>(MD->getDeclContext()))
658 Out << '(' << *CID << ')';
661 Out << MD->getSelector().getAsString();
665 return Name.str().str();
667 if (isa<TranslationUnitDecl>(CurrentDecl) && IT == PrettyFunction) {
668 // __PRETTY_FUNCTION__ -> "top level", the others produce an empty string.
674 void APNumericStorage::setIntValue(const ASTContext &C,
675 const llvm::APInt &Val) {
679 BitWidth = Val.getBitWidth();
680 unsigned NumWords = Val.getNumWords();
681 const uint64_t* Words = Val.getRawData();
683 pVal = new (C) uint64_t[NumWords];
684 std::copy(Words, Words + NumWords, pVal);
685 } else if (NumWords == 1)
691 IntegerLiteral::IntegerLiteral(const ASTContext &C, const llvm::APInt &V,
692 QualType type, SourceLocation l)
693 : Expr(IntegerLiteralClass, type, VK_RValue, OK_Ordinary, false, false,
696 assert(type->isIntegerType() && "Illegal type in IntegerLiteral");
697 assert(V.getBitWidth() == C.getIntWidth(type) &&
698 "Integer type is not the correct size for constant.");
703 IntegerLiteral::Create(const ASTContext &C, const llvm::APInt &V,
704 QualType type, SourceLocation l) {
705 return new (C) IntegerLiteral(C, V, type, l);
709 IntegerLiteral::Create(const ASTContext &C, EmptyShell Empty) {
710 return new (C) IntegerLiteral(Empty);
713 FloatingLiteral::FloatingLiteral(const ASTContext &C, const llvm::APFloat &V,
714 bool isexact, QualType Type, SourceLocation L)
715 : Expr(FloatingLiteralClass, Type, VK_RValue, OK_Ordinary, false, false,
716 false, false), Loc(L) {
717 setSemantics(V.getSemantics());
718 FloatingLiteralBits.IsExact = isexact;
722 FloatingLiteral::FloatingLiteral(const ASTContext &C, EmptyShell Empty)
723 : Expr(FloatingLiteralClass, Empty) {
724 setRawSemantics(IEEEhalf);
725 FloatingLiteralBits.IsExact = false;
729 FloatingLiteral::Create(const ASTContext &C, const llvm::APFloat &V,
730 bool isexact, QualType Type, SourceLocation L) {
731 return new (C) FloatingLiteral(C, V, isexact, Type, L);
735 FloatingLiteral::Create(const ASTContext &C, EmptyShell Empty) {
736 return new (C) FloatingLiteral(C, Empty);
739 const llvm::fltSemantics &FloatingLiteral::getSemantics() const {
740 switch(FloatingLiteralBits.Semantics) {
742 return llvm::APFloat::IEEEhalf;
744 return llvm::APFloat::IEEEsingle;
746 return llvm::APFloat::IEEEdouble;
747 case x87DoubleExtended:
748 return llvm::APFloat::x87DoubleExtended;
750 return llvm::APFloat::IEEEquad;
751 case PPCDoubleDouble:
752 return llvm::APFloat::PPCDoubleDouble;
754 llvm_unreachable("Unrecognised floating semantics");
757 void FloatingLiteral::setSemantics(const llvm::fltSemantics &Sem) {
758 if (&Sem == &llvm::APFloat::IEEEhalf)
759 FloatingLiteralBits.Semantics = IEEEhalf;
760 else if (&Sem == &llvm::APFloat::IEEEsingle)
761 FloatingLiteralBits.Semantics = IEEEsingle;
762 else if (&Sem == &llvm::APFloat::IEEEdouble)
763 FloatingLiteralBits.Semantics = IEEEdouble;
764 else if (&Sem == &llvm::APFloat::x87DoubleExtended)
765 FloatingLiteralBits.Semantics = x87DoubleExtended;
766 else if (&Sem == &llvm::APFloat::IEEEquad)
767 FloatingLiteralBits.Semantics = IEEEquad;
768 else if (&Sem == &llvm::APFloat::PPCDoubleDouble)
769 FloatingLiteralBits.Semantics = PPCDoubleDouble;
771 llvm_unreachable("Unknown floating semantics");
774 /// getValueAsApproximateDouble - This returns the value as an inaccurate
775 /// double. Note that this may cause loss of precision, but is useful for
776 /// debugging dumps, etc.
777 double FloatingLiteral::getValueAsApproximateDouble() const {
778 llvm::APFloat V = getValue();
780 V.convert(llvm::APFloat::IEEEdouble, llvm::APFloat::rmNearestTiesToEven,
782 return V.convertToDouble();
785 int StringLiteral::mapCharByteWidth(TargetInfo const &target,StringKind k) {
786 int CharByteWidth = 0;
790 CharByteWidth = target.getCharWidth();
793 CharByteWidth = target.getWCharWidth();
796 CharByteWidth = target.getChar16Width();
799 CharByteWidth = target.getChar32Width();
802 assert((CharByteWidth & 7) == 0 && "Assumes character size is byte multiple");
804 assert((CharByteWidth==1 || CharByteWidth==2 || CharByteWidth==4)
805 && "character byte widths supported are 1, 2, and 4 only");
806 return CharByteWidth;
809 StringLiteral *StringLiteral::Create(const ASTContext &C, StringRef Str,
810 StringKind Kind, bool Pascal, QualType Ty,
811 const SourceLocation *Loc,
813 // Allocate enough space for the StringLiteral plus an array of locations for
814 // any concatenated string tokens.
815 void *Mem = C.Allocate(sizeof(StringLiteral)+
816 sizeof(SourceLocation)*(NumStrs-1),
817 llvm::alignOf<StringLiteral>());
818 StringLiteral *SL = new (Mem) StringLiteral(Ty);
820 // OPTIMIZE: could allocate this appended to the StringLiteral.
821 SL->setString(C,Str,Kind,Pascal);
823 SL->TokLocs[0] = Loc[0];
824 SL->NumConcatenated = NumStrs;
827 memcpy(&SL->TokLocs[1], Loc+1, sizeof(SourceLocation)*(NumStrs-1));
831 StringLiteral *StringLiteral::CreateEmpty(const ASTContext &C,
833 void *Mem = C.Allocate(sizeof(StringLiteral)+
834 sizeof(SourceLocation)*(NumStrs-1),
835 llvm::alignOf<StringLiteral>());
836 StringLiteral *SL = new (Mem) StringLiteral(QualType());
837 SL->CharByteWidth = 0;
839 SL->NumConcatenated = NumStrs;
843 void StringLiteral::outputString(raw_ostream &OS) const {
845 case Ascii: break; // no prefix.
846 case Wide: OS << 'L'; break;
847 case UTF8: OS << "u8"; break;
848 case UTF16: OS << 'u'; break;
849 case UTF32: OS << 'U'; break;
852 static const char Hex[] = "0123456789ABCDEF";
854 unsigned LastSlashX = getLength();
855 for (unsigned I = 0, N = getLength(); I != N; ++I) {
856 switch (uint32_t Char = getCodeUnit(I)) {
858 // FIXME: Convert UTF-8 back to codepoints before rendering.
860 // Convert UTF-16 surrogate pairs back to codepoints before rendering.
861 // Leave invalid surrogates alone; we'll use \x for those.
862 if (getKind() == UTF16 && I != N - 1 && Char >= 0xd800 &&
864 uint32_t Trail = getCodeUnit(I + 1);
865 if (Trail >= 0xdc00 && Trail <= 0xdfff) {
866 Char = 0x10000 + ((Char - 0xd800) << 10) + (Trail - 0xdc00);
872 // If this is a wide string, output characters over 0xff using \x
873 // escapes. Otherwise, this is a UTF-16 or UTF-32 string, and Char is a
874 // codepoint: use \x escapes for invalid codepoints.
875 if (getKind() == Wide ||
876 (Char >= 0xd800 && Char <= 0xdfff) || Char >= 0x110000) {
877 // FIXME: Is this the best way to print wchar_t?
880 while ((Char >> Shift) == 0)
882 for (/**/; Shift >= 0; Shift -= 4)
883 OS << Hex[(Char >> Shift) & 15];
890 << Hex[(Char >> 20) & 15]
891 << Hex[(Char >> 16) & 15];
894 OS << Hex[(Char >> 12) & 15]
895 << Hex[(Char >> 8) & 15]
896 << Hex[(Char >> 4) & 15]
897 << Hex[(Char >> 0) & 15];
901 // If we used \x... for the previous character, and this character is a
902 // hexadecimal digit, prevent it being slurped as part of the \x.
903 if (LastSlashX + 1 == I) {
905 case '0': case '1': case '2': case '3': case '4':
906 case '5': case '6': case '7': case '8': case '9':
907 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
908 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
913 assert(Char <= 0xff &&
914 "Characters above 0xff should already have been handled.");
916 if (isPrintable(Char))
918 else // Output anything hard as an octal escape.
920 << (char)('0' + ((Char >> 6) & 7))
921 << (char)('0' + ((Char >> 3) & 7))
922 << (char)('0' + ((Char >> 0) & 7));
924 // Handle some common non-printable cases to make dumps prettier.
925 case '\\': OS << "\\\\"; break;
926 case '"': OS << "\\\""; break;
927 case '\n': OS << "\\n"; break;
928 case '\t': OS << "\\t"; break;
929 case '\a': OS << "\\a"; break;
930 case '\b': OS << "\\b"; break;
936 void StringLiteral::setString(const ASTContext &C, StringRef Str,
937 StringKind Kind, bool IsPascal) {
938 //FIXME: we assume that the string data comes from a target that uses the same
939 // code unit size and endianess for the type of string.
941 this->IsPascal = IsPascal;
943 CharByteWidth = mapCharByteWidth(C.getTargetInfo(),Kind);
944 assert((Str.size()%CharByteWidth == 0)
945 && "size of data must be multiple of CharByteWidth");
946 Length = Str.size()/CharByteWidth;
948 switch(CharByteWidth) {
950 char *AStrData = new (C) char[Length];
951 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
952 StrData.asChar = AStrData;
956 uint16_t *AStrData = new (C) uint16_t[Length];
957 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
958 StrData.asUInt16 = AStrData;
962 uint32_t *AStrData = new (C) uint32_t[Length];
963 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
964 StrData.asUInt32 = AStrData;
968 assert(false && "unsupported CharByteWidth");
972 /// getLocationOfByte - Return a source location that points to the specified
973 /// byte of this string literal.
975 /// Strings are amazingly complex. They can be formed from multiple tokens and
976 /// can have escape sequences in them in addition to the usual trigraph and
977 /// escaped newline business. This routine handles this complexity.
979 SourceLocation StringLiteral::
980 getLocationOfByte(unsigned ByteNo, const SourceManager &SM,
981 const LangOptions &Features, const TargetInfo &Target) const {
982 assert((Kind == StringLiteral::Ascii || Kind == StringLiteral::UTF8) &&
983 "Only narrow string literals are currently supported");
985 // Loop over all of the tokens in this string until we find the one that
986 // contains the byte we're looking for.
989 assert(TokNo < getNumConcatenated() && "Invalid byte number!");
990 SourceLocation StrTokLoc = getStrTokenLoc(TokNo);
992 // Get the spelling of the string so that we can get the data that makes up
993 // the string literal, not the identifier for the macro it is potentially
995 SourceLocation StrTokSpellingLoc = SM.getSpellingLoc(StrTokLoc);
997 // Re-lex the token to get its length and original spelling.
998 std::pair<FileID, unsigned> LocInfo =SM.getDecomposedLoc(StrTokSpellingLoc);
999 bool Invalid = false;
1000 StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid);
1002 return StrTokSpellingLoc;
1004 const char *StrData = Buffer.data()+LocInfo.second;
1006 // Create a lexer starting at the beginning of this token.
1007 Lexer TheLexer(SM.getLocForStartOfFile(LocInfo.first), Features,
1008 Buffer.begin(), StrData, Buffer.end());
1010 TheLexer.LexFromRawLexer(TheTok);
1012 // Use the StringLiteralParser to compute the length of the string in bytes.
1013 StringLiteralParser SLP(&TheTok, 1, SM, Features, Target);
1014 unsigned TokNumBytes = SLP.GetStringLength();
1016 // If the byte is in this token, return the location of the byte.
1017 if (ByteNo < TokNumBytes ||
1018 (ByteNo == TokNumBytes && TokNo == getNumConcatenated() - 1)) {
1019 unsigned Offset = SLP.getOffsetOfStringByte(TheTok, ByteNo);
1021 // Now that we know the offset of the token in the spelling, use the
1022 // preprocessor to get the offset in the original source.
1023 return Lexer::AdvanceToTokenCharacter(StrTokLoc, Offset, SM, Features);
1026 // Move to the next string token.
1028 ByteNo -= TokNumBytes;
1034 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1035 /// corresponds to, e.g. "sizeof" or "[pre]++".
1036 StringRef UnaryOperator::getOpcodeStr(Opcode Op) {
1038 case UO_PostInc: return "++";
1039 case UO_PostDec: return "--";
1040 case UO_PreInc: return "++";
1041 case UO_PreDec: return "--";
1042 case UO_AddrOf: return "&";
1043 case UO_Deref: return "*";
1044 case UO_Plus: return "+";
1045 case UO_Minus: return "-";
1046 case UO_Not: return "~";
1047 case UO_LNot: return "!";
1048 case UO_Real: return "__real";
1049 case UO_Imag: return "__imag";
1050 case UO_Extension: return "__extension__";
1052 llvm_unreachable("Unknown unary operator");
1056 UnaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix) {
1058 default: llvm_unreachable("No unary operator for overloaded function");
1059 case OO_PlusPlus: return Postfix ? UO_PostInc : UO_PreInc;
1060 case OO_MinusMinus: return Postfix ? UO_PostDec : UO_PreDec;
1061 case OO_Amp: return UO_AddrOf;
1062 case OO_Star: return UO_Deref;
1063 case OO_Plus: return UO_Plus;
1064 case OO_Minus: return UO_Minus;
1065 case OO_Tilde: return UO_Not;
1066 case OO_Exclaim: return UO_LNot;
1070 OverloadedOperatorKind UnaryOperator::getOverloadedOperator(Opcode Opc) {
1072 case UO_PostInc: case UO_PreInc: return OO_PlusPlus;
1073 case UO_PostDec: case UO_PreDec: return OO_MinusMinus;
1074 case UO_AddrOf: return OO_Amp;
1075 case UO_Deref: return OO_Star;
1076 case UO_Plus: return OO_Plus;
1077 case UO_Minus: return OO_Minus;
1078 case UO_Not: return OO_Tilde;
1079 case UO_LNot: return OO_Exclaim;
1080 default: return OO_None;
1085 //===----------------------------------------------------------------------===//
1086 // Postfix Operators.
1087 //===----------------------------------------------------------------------===//
1089 CallExpr::CallExpr(const ASTContext& C, StmtClass SC, Expr *fn,
1090 unsigned NumPreArgs, ArrayRef<Expr*> args, QualType t,
1091 ExprValueKind VK, SourceLocation rparenloc)
1092 : Expr(SC, t, VK, OK_Ordinary,
1093 fn->isTypeDependent(),
1094 fn->isValueDependent(),
1095 fn->isInstantiationDependent(),
1096 fn->containsUnexpandedParameterPack()),
1097 NumArgs(args.size()) {
1099 SubExprs = new (C) Stmt*[args.size()+PREARGS_START+NumPreArgs];
1101 for (unsigned i = 0; i != args.size(); ++i) {
1102 if (args[i]->isTypeDependent())
1103 ExprBits.TypeDependent = true;
1104 if (args[i]->isValueDependent())
1105 ExprBits.ValueDependent = true;
1106 if (args[i]->isInstantiationDependent())
1107 ExprBits.InstantiationDependent = true;
1108 if (args[i]->containsUnexpandedParameterPack())
1109 ExprBits.ContainsUnexpandedParameterPack = true;
1111 SubExprs[i+PREARGS_START+NumPreArgs] = args[i];
1114 CallExprBits.NumPreArgs = NumPreArgs;
1115 RParenLoc = rparenloc;
1118 CallExpr::CallExpr(const ASTContext& C, Expr *fn, ArrayRef<Expr*> args,
1119 QualType t, ExprValueKind VK, SourceLocation rparenloc)
1120 : Expr(CallExprClass, t, VK, OK_Ordinary,
1121 fn->isTypeDependent(),
1122 fn->isValueDependent(),
1123 fn->isInstantiationDependent(),
1124 fn->containsUnexpandedParameterPack()),
1125 NumArgs(args.size()) {
1127 SubExprs = new (C) Stmt*[args.size()+PREARGS_START];
1129 for (unsigned i = 0; i != args.size(); ++i) {
1130 if (args[i]->isTypeDependent())
1131 ExprBits.TypeDependent = true;
1132 if (args[i]->isValueDependent())
1133 ExprBits.ValueDependent = true;
1134 if (args[i]->isInstantiationDependent())
1135 ExprBits.InstantiationDependent = true;
1136 if (args[i]->containsUnexpandedParameterPack())
1137 ExprBits.ContainsUnexpandedParameterPack = true;
1139 SubExprs[i+PREARGS_START] = args[i];
1142 CallExprBits.NumPreArgs = 0;
1143 RParenLoc = rparenloc;
1146 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, EmptyShell Empty)
1147 : Expr(SC, Empty), SubExprs(0), NumArgs(0) {
1148 // FIXME: Why do we allocate this?
1149 SubExprs = new (C) Stmt*[PREARGS_START];
1150 CallExprBits.NumPreArgs = 0;
1153 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, unsigned NumPreArgs,
1155 : Expr(SC, Empty), SubExprs(0), NumArgs(0) {
1156 // FIXME: Why do we allocate this?
1157 SubExprs = new (C) Stmt*[PREARGS_START+NumPreArgs];
1158 CallExprBits.NumPreArgs = NumPreArgs;
1161 Decl *CallExpr::getCalleeDecl() {
1162 Expr *CEE = getCallee()->IgnoreParenImpCasts();
1164 while (SubstNonTypeTemplateParmExpr *NTTP
1165 = dyn_cast<SubstNonTypeTemplateParmExpr>(CEE)) {
1166 CEE = NTTP->getReplacement()->IgnoreParenCasts();
1169 // If we're calling a dereference, look at the pointer instead.
1170 if (BinaryOperator *BO = dyn_cast<BinaryOperator>(CEE)) {
1171 if (BO->isPtrMemOp())
1172 CEE = BO->getRHS()->IgnoreParenCasts();
1173 } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(CEE)) {
1174 if (UO->getOpcode() == UO_Deref)
1175 CEE = UO->getSubExpr()->IgnoreParenCasts();
1177 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE))
1178 return DRE->getDecl();
1179 if (MemberExpr *ME = dyn_cast<MemberExpr>(CEE))
1180 return ME->getMemberDecl();
1185 FunctionDecl *CallExpr::getDirectCallee() {
1186 return dyn_cast_or_null<FunctionDecl>(getCalleeDecl());
1189 /// setNumArgs - This changes the number of arguments present in this call.
1190 /// Any orphaned expressions are deleted by this, and any new operands are set
1192 void CallExpr::setNumArgs(const ASTContext& C, unsigned NumArgs) {
1193 // No change, just return.
1194 if (NumArgs == getNumArgs()) return;
1196 // If shrinking # arguments, just delete the extras and forgot them.
1197 if (NumArgs < getNumArgs()) {
1198 this->NumArgs = NumArgs;
1202 // Otherwise, we are growing the # arguments. New an bigger argument array.
1203 unsigned NumPreArgs = getNumPreArgs();
1204 Stmt **NewSubExprs = new (C) Stmt*[NumArgs+PREARGS_START+NumPreArgs];
1206 for (unsigned i = 0; i != getNumArgs()+PREARGS_START+NumPreArgs; ++i)
1207 NewSubExprs[i] = SubExprs[i];
1208 // Null out new args.
1209 for (unsigned i = getNumArgs()+PREARGS_START+NumPreArgs;
1210 i != NumArgs+PREARGS_START+NumPreArgs; ++i)
1213 if (SubExprs) C.Deallocate(SubExprs);
1214 SubExprs = NewSubExprs;
1215 this->NumArgs = NumArgs;
1218 /// isBuiltinCall - If this is a call to a builtin, return the builtin ID. If
1220 unsigned CallExpr::isBuiltinCall() const {
1221 // All simple function calls (e.g. func()) are implicitly cast to pointer to
1222 // function. As a result, we try and obtain the DeclRefExpr from the
1223 // ImplicitCastExpr.
1224 const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee());
1225 if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()).
1228 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr());
1232 const FunctionDecl *FDecl = dyn_cast<FunctionDecl>(DRE->getDecl());
1236 if (!FDecl->getIdentifier())
1239 return FDecl->getBuiltinID();
1242 bool CallExpr::isUnevaluatedBuiltinCall(ASTContext &Ctx) const {
1243 if (unsigned BI = isBuiltinCall())
1244 return Ctx.BuiltinInfo.isUnevaluated(BI);
1248 QualType CallExpr::getCallReturnType() const {
1249 QualType CalleeType = getCallee()->getType();
1250 if (const PointerType *FnTypePtr = CalleeType->getAs<PointerType>())
1251 CalleeType = FnTypePtr->getPointeeType();
1252 else if (const BlockPointerType *BPT = CalleeType->getAs<BlockPointerType>())
1253 CalleeType = BPT->getPointeeType();
1254 else if (CalleeType->isSpecificPlaceholderType(BuiltinType::BoundMember))
1255 // This should never be overloaded and so should never return null.
1256 CalleeType = Expr::findBoundMemberType(getCallee());
1258 const FunctionType *FnType = CalleeType->castAs<FunctionType>();
1259 return FnType->getResultType();
1262 SourceLocation CallExpr::getLocStart() const {
1263 if (isa<CXXOperatorCallExpr>(this))
1264 return cast<CXXOperatorCallExpr>(this)->getLocStart();
1266 SourceLocation begin = getCallee()->getLocStart();
1267 if (begin.isInvalid() && getNumArgs() > 0)
1268 begin = getArg(0)->getLocStart();
1271 SourceLocation CallExpr::getLocEnd() const {
1272 if (isa<CXXOperatorCallExpr>(this))
1273 return cast<CXXOperatorCallExpr>(this)->getLocEnd();
1275 SourceLocation end = getRParenLoc();
1276 if (end.isInvalid() && getNumArgs() > 0)
1277 end = getArg(getNumArgs() - 1)->getLocEnd();
1281 OffsetOfExpr *OffsetOfExpr::Create(const ASTContext &C, QualType type,
1282 SourceLocation OperatorLoc,
1283 TypeSourceInfo *tsi,
1284 ArrayRef<OffsetOfNode> comps,
1285 ArrayRef<Expr*> exprs,
1286 SourceLocation RParenLoc) {
1287 void *Mem = C.Allocate(sizeof(OffsetOfExpr) +
1288 sizeof(OffsetOfNode) * comps.size() +
1289 sizeof(Expr*) * exprs.size());
1291 return new (Mem) OffsetOfExpr(C, type, OperatorLoc, tsi, comps, exprs,
1295 OffsetOfExpr *OffsetOfExpr::CreateEmpty(const ASTContext &C,
1296 unsigned numComps, unsigned numExprs) {
1297 void *Mem = C.Allocate(sizeof(OffsetOfExpr) +
1298 sizeof(OffsetOfNode) * numComps +
1299 sizeof(Expr*) * numExprs);
1300 return new (Mem) OffsetOfExpr(numComps, numExprs);
1303 OffsetOfExpr::OffsetOfExpr(const ASTContext &C, QualType type,
1304 SourceLocation OperatorLoc, TypeSourceInfo *tsi,
1305 ArrayRef<OffsetOfNode> comps, ArrayRef<Expr*> exprs,
1306 SourceLocation RParenLoc)
1307 : Expr(OffsetOfExprClass, type, VK_RValue, OK_Ordinary,
1308 /*TypeDependent=*/false,
1309 /*ValueDependent=*/tsi->getType()->isDependentType(),
1310 tsi->getType()->isInstantiationDependentType(),
1311 tsi->getType()->containsUnexpandedParameterPack()),
1312 OperatorLoc(OperatorLoc), RParenLoc(RParenLoc), TSInfo(tsi),
1313 NumComps(comps.size()), NumExprs(exprs.size())
1315 for (unsigned i = 0; i != comps.size(); ++i) {
1316 setComponent(i, comps[i]);
1319 for (unsigned i = 0; i != exprs.size(); ++i) {
1320 if (exprs[i]->isTypeDependent() || exprs[i]->isValueDependent())
1321 ExprBits.ValueDependent = true;
1322 if (exprs[i]->containsUnexpandedParameterPack())
1323 ExprBits.ContainsUnexpandedParameterPack = true;
1325 setIndexExpr(i, exprs[i]);
1329 IdentifierInfo *OffsetOfExpr::OffsetOfNode::getFieldName() const {
1330 assert(getKind() == Field || getKind() == Identifier);
1331 if (getKind() == Field)
1332 return getField()->getIdentifier();
1334 return reinterpret_cast<IdentifierInfo *> (Data & ~(uintptr_t)Mask);
1337 MemberExpr *MemberExpr::Create(const ASTContext &C, Expr *base, bool isarrow,
1338 NestedNameSpecifierLoc QualifierLoc,
1339 SourceLocation TemplateKWLoc,
1340 ValueDecl *memberdecl,
1341 DeclAccessPair founddecl,
1342 DeclarationNameInfo nameinfo,
1343 const TemplateArgumentListInfo *targs,
1346 ExprObjectKind ok) {
1347 std::size_t Size = sizeof(MemberExpr);
1349 bool hasQualOrFound = (QualifierLoc ||
1350 founddecl.getDecl() != memberdecl ||
1351 founddecl.getAccess() != memberdecl->getAccess());
1353 Size += sizeof(MemberNameQualifier);
1356 Size += ASTTemplateKWAndArgsInfo::sizeFor(targs->size());
1357 else if (TemplateKWLoc.isValid())
1358 Size += ASTTemplateKWAndArgsInfo::sizeFor(0);
1360 void *Mem = C.Allocate(Size, llvm::alignOf<MemberExpr>());
1361 MemberExpr *E = new (Mem) MemberExpr(base, isarrow, memberdecl, nameinfo,
1364 if (hasQualOrFound) {
1365 // FIXME: Wrong. We should be looking at the member declaration we found.
1366 if (QualifierLoc && QualifierLoc.getNestedNameSpecifier()->isDependent()) {
1367 E->setValueDependent(true);
1368 E->setTypeDependent(true);
1369 E->setInstantiationDependent(true);
1371 else if (QualifierLoc &&
1372 QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent())
1373 E->setInstantiationDependent(true);
1375 E->HasQualifierOrFoundDecl = true;
1377 MemberNameQualifier *NQ = E->getMemberQualifier();
1378 NQ->QualifierLoc = QualifierLoc;
1379 NQ->FoundDecl = founddecl;
1382 E->HasTemplateKWAndArgsInfo = (targs || TemplateKWLoc.isValid());
1385 bool Dependent = false;
1386 bool InstantiationDependent = false;
1387 bool ContainsUnexpandedParameterPack = false;
1388 E->getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc, *targs,
1390 InstantiationDependent,
1391 ContainsUnexpandedParameterPack);
1392 if (InstantiationDependent)
1393 E->setInstantiationDependent(true);
1394 } else if (TemplateKWLoc.isValid()) {
1395 E->getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc);
1401 SourceLocation MemberExpr::getLocStart() const {
1402 if (isImplicitAccess()) {
1404 return getQualifierLoc().getBeginLoc();
1408 // FIXME: We don't want this to happen. Rather, we should be able to
1409 // detect all kinds of implicit accesses more cleanly.
1410 SourceLocation BaseStartLoc = getBase()->getLocStart();
1411 if (BaseStartLoc.isValid())
1412 return BaseStartLoc;
1415 SourceLocation MemberExpr::getLocEnd() const {
1416 SourceLocation EndLoc = getMemberNameInfo().getEndLoc();
1417 if (hasExplicitTemplateArgs())
1418 EndLoc = getRAngleLoc();
1419 else if (EndLoc.isInvalid())
1420 EndLoc = getBase()->getLocEnd();
1424 void CastExpr::CheckCastConsistency() const {
1425 switch (getCastKind()) {
1426 case CK_DerivedToBase:
1427 case CK_UncheckedDerivedToBase:
1428 case CK_DerivedToBaseMemberPointer:
1429 case CK_BaseToDerived:
1430 case CK_BaseToDerivedMemberPointer:
1431 assert(!path_empty() && "Cast kind should have a base path!");
1434 case CK_CPointerToObjCPointerCast:
1435 assert(getType()->isObjCObjectPointerType());
1436 assert(getSubExpr()->getType()->isPointerType());
1437 goto CheckNoBasePath;
1439 case CK_BlockPointerToObjCPointerCast:
1440 assert(getType()->isObjCObjectPointerType());
1441 assert(getSubExpr()->getType()->isBlockPointerType());
1442 goto CheckNoBasePath;
1444 case CK_ReinterpretMemberPointer:
1445 assert(getType()->isMemberPointerType());
1446 assert(getSubExpr()->getType()->isMemberPointerType());
1447 goto CheckNoBasePath;
1450 // Arbitrary casts to C pointer types count as bitcasts.
1451 // Otherwise, we should only have block and ObjC pointer casts
1452 // here if they stay within the type kind.
1453 if (!getType()->isPointerType()) {
1454 assert(getType()->isObjCObjectPointerType() ==
1455 getSubExpr()->getType()->isObjCObjectPointerType());
1456 assert(getType()->isBlockPointerType() ==
1457 getSubExpr()->getType()->isBlockPointerType());
1459 goto CheckNoBasePath;
1461 case CK_AnyPointerToBlockPointerCast:
1462 assert(getType()->isBlockPointerType());
1463 assert(getSubExpr()->getType()->isAnyPointerType() &&
1464 !getSubExpr()->getType()->isBlockPointerType());
1465 goto CheckNoBasePath;
1467 case CK_CopyAndAutoreleaseBlockObject:
1468 assert(getType()->isBlockPointerType());
1469 assert(getSubExpr()->getType()->isBlockPointerType());
1470 goto CheckNoBasePath;
1472 case CK_FunctionToPointerDecay:
1473 assert(getType()->isPointerType());
1474 assert(getSubExpr()->getType()->isFunctionType());
1475 goto CheckNoBasePath;
1477 // These should not have an inheritance path.
1480 case CK_ArrayToPointerDecay:
1481 case CK_NullToMemberPointer:
1482 case CK_NullToPointer:
1483 case CK_ConstructorConversion:
1484 case CK_IntegralToPointer:
1485 case CK_PointerToIntegral:
1487 case CK_VectorSplat:
1488 case CK_IntegralCast:
1489 case CK_IntegralToFloating:
1490 case CK_FloatingToIntegral:
1491 case CK_FloatingCast:
1492 case CK_ObjCObjectLValueCast:
1493 case CK_FloatingRealToComplex:
1494 case CK_FloatingComplexToReal:
1495 case CK_FloatingComplexCast:
1496 case CK_FloatingComplexToIntegralComplex:
1497 case CK_IntegralRealToComplex:
1498 case CK_IntegralComplexToReal:
1499 case CK_IntegralComplexCast:
1500 case CK_IntegralComplexToFloatingComplex:
1501 case CK_ARCProduceObject:
1502 case CK_ARCConsumeObject:
1503 case CK_ARCReclaimReturnedObject:
1504 case CK_ARCExtendBlockObject:
1505 case CK_ZeroToOCLEvent:
1506 assert(!getType()->isBooleanType() && "unheralded conversion to bool");
1507 goto CheckNoBasePath;
1510 case CK_LValueToRValue:
1512 case CK_AtomicToNonAtomic:
1513 case CK_NonAtomicToAtomic:
1514 case CK_PointerToBoolean:
1515 case CK_IntegralToBoolean:
1516 case CK_FloatingToBoolean:
1517 case CK_MemberPointerToBoolean:
1518 case CK_FloatingComplexToBoolean:
1519 case CK_IntegralComplexToBoolean:
1520 case CK_LValueBitCast: // -> bool&
1521 case CK_UserDefinedConversion: // operator bool()
1522 case CK_BuiltinFnToFnPtr:
1524 assert(path_empty() && "Cast kind should not have a base path!");
1529 const char *CastExpr::getCastKindName() const {
1530 switch (getCastKind()) {
1535 case CK_LValueBitCast:
1536 return "LValueBitCast";
1537 case CK_LValueToRValue:
1538 return "LValueToRValue";
1541 case CK_BaseToDerived:
1542 return "BaseToDerived";
1543 case CK_DerivedToBase:
1544 return "DerivedToBase";
1545 case CK_UncheckedDerivedToBase:
1546 return "UncheckedDerivedToBase";
1551 case CK_ArrayToPointerDecay:
1552 return "ArrayToPointerDecay";
1553 case CK_FunctionToPointerDecay:
1554 return "FunctionToPointerDecay";
1555 case CK_NullToMemberPointer:
1556 return "NullToMemberPointer";
1557 case CK_NullToPointer:
1558 return "NullToPointer";
1559 case CK_BaseToDerivedMemberPointer:
1560 return "BaseToDerivedMemberPointer";
1561 case CK_DerivedToBaseMemberPointer:
1562 return "DerivedToBaseMemberPointer";
1563 case CK_ReinterpretMemberPointer:
1564 return "ReinterpretMemberPointer";
1565 case CK_UserDefinedConversion:
1566 return "UserDefinedConversion";
1567 case CK_ConstructorConversion:
1568 return "ConstructorConversion";
1569 case CK_IntegralToPointer:
1570 return "IntegralToPointer";
1571 case CK_PointerToIntegral:
1572 return "PointerToIntegral";
1573 case CK_PointerToBoolean:
1574 return "PointerToBoolean";
1577 case CK_VectorSplat:
1578 return "VectorSplat";
1579 case CK_IntegralCast:
1580 return "IntegralCast";
1581 case CK_IntegralToBoolean:
1582 return "IntegralToBoolean";
1583 case CK_IntegralToFloating:
1584 return "IntegralToFloating";
1585 case CK_FloatingToIntegral:
1586 return "FloatingToIntegral";
1587 case CK_FloatingCast:
1588 return "FloatingCast";
1589 case CK_FloatingToBoolean:
1590 return "FloatingToBoolean";
1591 case CK_MemberPointerToBoolean:
1592 return "MemberPointerToBoolean";
1593 case CK_CPointerToObjCPointerCast:
1594 return "CPointerToObjCPointerCast";
1595 case CK_BlockPointerToObjCPointerCast:
1596 return "BlockPointerToObjCPointerCast";
1597 case CK_AnyPointerToBlockPointerCast:
1598 return "AnyPointerToBlockPointerCast";
1599 case CK_ObjCObjectLValueCast:
1600 return "ObjCObjectLValueCast";
1601 case CK_FloatingRealToComplex:
1602 return "FloatingRealToComplex";
1603 case CK_FloatingComplexToReal:
1604 return "FloatingComplexToReal";
1605 case CK_FloatingComplexToBoolean:
1606 return "FloatingComplexToBoolean";
1607 case CK_FloatingComplexCast:
1608 return "FloatingComplexCast";
1609 case CK_FloatingComplexToIntegralComplex:
1610 return "FloatingComplexToIntegralComplex";
1611 case CK_IntegralRealToComplex:
1612 return "IntegralRealToComplex";
1613 case CK_IntegralComplexToReal:
1614 return "IntegralComplexToReal";
1615 case CK_IntegralComplexToBoolean:
1616 return "IntegralComplexToBoolean";
1617 case CK_IntegralComplexCast:
1618 return "IntegralComplexCast";
1619 case CK_IntegralComplexToFloatingComplex:
1620 return "IntegralComplexToFloatingComplex";
1621 case CK_ARCConsumeObject:
1622 return "ARCConsumeObject";
1623 case CK_ARCProduceObject:
1624 return "ARCProduceObject";
1625 case CK_ARCReclaimReturnedObject:
1626 return "ARCReclaimReturnedObject";
1627 case CK_ARCExtendBlockObject:
1628 return "ARCCExtendBlockObject";
1629 case CK_AtomicToNonAtomic:
1630 return "AtomicToNonAtomic";
1631 case CK_NonAtomicToAtomic:
1632 return "NonAtomicToAtomic";
1633 case CK_CopyAndAutoreleaseBlockObject:
1634 return "CopyAndAutoreleaseBlockObject";
1635 case CK_BuiltinFnToFnPtr:
1636 return "BuiltinFnToFnPtr";
1637 case CK_ZeroToOCLEvent:
1638 return "ZeroToOCLEvent";
1641 llvm_unreachable("Unhandled cast kind!");
1644 Expr *CastExpr::getSubExprAsWritten() {
1648 SubExpr = E->getSubExpr();
1650 // Skip through reference binding to temporary.
1651 if (MaterializeTemporaryExpr *Materialize
1652 = dyn_cast<MaterializeTemporaryExpr>(SubExpr))
1653 SubExpr = Materialize->GetTemporaryExpr();
1655 // Skip any temporary bindings; they're implicit.
1656 if (CXXBindTemporaryExpr *Binder = dyn_cast<CXXBindTemporaryExpr>(SubExpr))
1657 SubExpr = Binder->getSubExpr();
1659 // Conversions by constructor and conversion functions have a
1660 // subexpression describing the call; strip it off.
1661 if (E->getCastKind() == CK_ConstructorConversion)
1662 SubExpr = cast<CXXConstructExpr>(SubExpr)->getArg(0);
1663 else if (E->getCastKind() == CK_UserDefinedConversion)
1664 SubExpr = cast<CXXMemberCallExpr>(SubExpr)->getImplicitObjectArgument();
1666 // If the subexpression we're left with is an implicit cast, look
1667 // through that, too.
1668 } while ((E = dyn_cast<ImplicitCastExpr>(SubExpr)));
1673 CXXBaseSpecifier **CastExpr::path_buffer() {
1674 switch (getStmtClass()) {
1675 #define ABSTRACT_STMT(x)
1676 #define CASTEXPR(Type, Base) \
1677 case Stmt::Type##Class: \
1678 return reinterpret_cast<CXXBaseSpecifier**>(static_cast<Type*>(this)+1);
1679 #define STMT(Type, Base)
1680 #include "clang/AST/StmtNodes.inc"
1682 llvm_unreachable("non-cast expressions not possible here");
1686 void CastExpr::setCastPath(const CXXCastPath &Path) {
1687 assert(Path.size() == path_size());
1688 memcpy(path_buffer(), Path.data(), Path.size() * sizeof(CXXBaseSpecifier*));
1691 ImplicitCastExpr *ImplicitCastExpr::Create(const ASTContext &C, QualType T,
1692 CastKind Kind, Expr *Operand,
1693 const CXXCastPath *BasePath,
1695 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1697 C.Allocate(sizeof(ImplicitCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1698 ImplicitCastExpr *E =
1699 new (Buffer) ImplicitCastExpr(T, Kind, Operand, PathSize, VK);
1700 if (PathSize) E->setCastPath(*BasePath);
1704 ImplicitCastExpr *ImplicitCastExpr::CreateEmpty(const ASTContext &C,
1705 unsigned PathSize) {
1707 C.Allocate(sizeof(ImplicitCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1708 return new (Buffer) ImplicitCastExpr(EmptyShell(), PathSize);
1712 CStyleCastExpr *CStyleCastExpr::Create(const ASTContext &C, QualType T,
1713 ExprValueKind VK, CastKind K, Expr *Op,
1714 const CXXCastPath *BasePath,
1715 TypeSourceInfo *WrittenTy,
1716 SourceLocation L, SourceLocation R) {
1717 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1719 C.Allocate(sizeof(CStyleCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1721 new (Buffer) CStyleCastExpr(T, VK, K, Op, PathSize, WrittenTy, L, R);
1722 if (PathSize) E->setCastPath(*BasePath);
1726 CStyleCastExpr *CStyleCastExpr::CreateEmpty(const ASTContext &C,
1727 unsigned PathSize) {
1729 C.Allocate(sizeof(CStyleCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1730 return new (Buffer) CStyleCastExpr(EmptyShell(), PathSize);
1733 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1734 /// corresponds to, e.g. "<<=".
1735 StringRef BinaryOperator::getOpcodeStr(Opcode Op) {
1737 case BO_PtrMemD: return ".*";
1738 case BO_PtrMemI: return "->*";
1739 case BO_Mul: return "*";
1740 case BO_Div: return "/";
1741 case BO_Rem: return "%";
1742 case BO_Add: return "+";
1743 case BO_Sub: return "-";
1744 case BO_Shl: return "<<";
1745 case BO_Shr: return ">>";
1746 case BO_LT: return "<";
1747 case BO_GT: return ">";
1748 case BO_LE: return "<=";
1749 case BO_GE: return ">=";
1750 case BO_EQ: return "==";
1751 case BO_NE: return "!=";
1752 case BO_And: return "&";
1753 case BO_Xor: return "^";
1754 case BO_Or: return "|";
1755 case BO_LAnd: return "&&";
1756 case BO_LOr: return "||";
1757 case BO_Assign: return "=";
1758 case BO_MulAssign: return "*=";
1759 case BO_DivAssign: return "/=";
1760 case BO_RemAssign: return "%=";
1761 case BO_AddAssign: return "+=";
1762 case BO_SubAssign: return "-=";
1763 case BO_ShlAssign: return "<<=";
1764 case BO_ShrAssign: return ">>=";
1765 case BO_AndAssign: return "&=";
1766 case BO_XorAssign: return "^=";
1767 case BO_OrAssign: return "|=";
1768 case BO_Comma: return ",";
1771 llvm_unreachable("Invalid OpCode!");
1775 BinaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO) {
1777 default: llvm_unreachable("Not an overloadable binary operator");
1778 case OO_Plus: return BO_Add;
1779 case OO_Minus: return BO_Sub;
1780 case OO_Star: return BO_Mul;
1781 case OO_Slash: return BO_Div;
1782 case OO_Percent: return BO_Rem;
1783 case OO_Caret: return BO_Xor;
1784 case OO_Amp: return BO_And;
1785 case OO_Pipe: return BO_Or;
1786 case OO_Equal: return BO_Assign;
1787 case OO_Less: return BO_LT;
1788 case OO_Greater: return BO_GT;
1789 case OO_PlusEqual: return BO_AddAssign;
1790 case OO_MinusEqual: return BO_SubAssign;
1791 case OO_StarEqual: return BO_MulAssign;
1792 case OO_SlashEqual: return BO_DivAssign;
1793 case OO_PercentEqual: return BO_RemAssign;
1794 case OO_CaretEqual: return BO_XorAssign;
1795 case OO_AmpEqual: return BO_AndAssign;
1796 case OO_PipeEqual: return BO_OrAssign;
1797 case OO_LessLess: return BO_Shl;
1798 case OO_GreaterGreater: return BO_Shr;
1799 case OO_LessLessEqual: return BO_ShlAssign;
1800 case OO_GreaterGreaterEqual: return BO_ShrAssign;
1801 case OO_EqualEqual: return BO_EQ;
1802 case OO_ExclaimEqual: return BO_NE;
1803 case OO_LessEqual: return BO_LE;
1804 case OO_GreaterEqual: return BO_GE;
1805 case OO_AmpAmp: return BO_LAnd;
1806 case OO_PipePipe: return BO_LOr;
1807 case OO_Comma: return BO_Comma;
1808 case OO_ArrowStar: return BO_PtrMemI;
1812 OverloadedOperatorKind BinaryOperator::getOverloadedOperator(Opcode Opc) {
1813 static const OverloadedOperatorKind OverOps[] = {
1814 /* .* Cannot be overloaded */OO_None, OO_ArrowStar,
1815 OO_Star, OO_Slash, OO_Percent,
1817 OO_LessLess, OO_GreaterGreater,
1818 OO_Less, OO_Greater, OO_LessEqual, OO_GreaterEqual,
1819 OO_EqualEqual, OO_ExclaimEqual,
1825 OO_Equal, OO_StarEqual,
1826 OO_SlashEqual, OO_PercentEqual,
1827 OO_PlusEqual, OO_MinusEqual,
1828 OO_LessLessEqual, OO_GreaterGreaterEqual,
1829 OO_AmpEqual, OO_CaretEqual,
1833 return OverOps[Opc];
1836 InitListExpr::InitListExpr(const ASTContext &C, SourceLocation lbraceloc,
1837 ArrayRef<Expr*> initExprs, SourceLocation rbraceloc)
1838 : Expr(InitListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false,
1840 InitExprs(C, initExprs.size()),
1841 LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), AltForm(0, true)
1843 sawArrayRangeDesignator(false);
1844 for (unsigned I = 0; I != initExprs.size(); ++I) {
1845 if (initExprs[I]->isTypeDependent())
1846 ExprBits.TypeDependent = true;
1847 if (initExprs[I]->isValueDependent())
1848 ExprBits.ValueDependent = true;
1849 if (initExprs[I]->isInstantiationDependent())
1850 ExprBits.InstantiationDependent = true;
1851 if (initExprs[I]->containsUnexpandedParameterPack())
1852 ExprBits.ContainsUnexpandedParameterPack = true;
1855 InitExprs.insert(C, InitExprs.end(), initExprs.begin(), initExprs.end());
1858 void InitListExpr::reserveInits(const ASTContext &C, unsigned NumInits) {
1859 if (NumInits > InitExprs.size())
1860 InitExprs.reserve(C, NumInits);
1863 void InitListExpr::resizeInits(const ASTContext &C, unsigned NumInits) {
1864 InitExprs.resize(C, NumInits, 0);
1867 Expr *InitListExpr::updateInit(const ASTContext &C, unsigned Init, Expr *expr) {
1868 if (Init >= InitExprs.size()) {
1869 InitExprs.insert(C, InitExprs.end(), Init - InitExprs.size() + 1, 0);
1870 InitExprs.back() = expr;
1874 Expr *Result = cast_or_null<Expr>(InitExprs[Init]);
1875 InitExprs[Init] = expr;
1879 void InitListExpr::setArrayFiller(Expr *filler) {
1880 assert(!hasArrayFiller() && "Filler already set!");
1881 ArrayFillerOrUnionFieldInit = filler;
1882 // Fill out any "holes" in the array due to designated initializers.
1883 Expr **inits = getInits();
1884 for (unsigned i = 0, e = getNumInits(); i != e; ++i)
1889 bool InitListExpr::isStringLiteralInit() const {
1890 if (getNumInits() != 1)
1892 const ArrayType *AT = getType()->getAsArrayTypeUnsafe();
1893 if (!AT || !AT->getElementType()->isIntegerType())
1895 const Expr *Init = getInit(0)->IgnoreParens();
1896 return isa<StringLiteral>(Init) || isa<ObjCEncodeExpr>(Init);
1899 SourceLocation InitListExpr::getLocStart() const {
1900 if (InitListExpr *SyntacticForm = getSyntacticForm())
1901 return SyntacticForm->getLocStart();
1902 SourceLocation Beg = LBraceLoc;
1903 if (Beg.isInvalid()) {
1904 // Find the first non-null initializer.
1905 for (InitExprsTy::const_iterator I = InitExprs.begin(),
1906 E = InitExprs.end();
1909 Beg = S->getLocStart();
1917 SourceLocation InitListExpr::getLocEnd() const {
1918 if (InitListExpr *SyntacticForm = getSyntacticForm())
1919 return SyntacticForm->getLocEnd();
1920 SourceLocation End = RBraceLoc;
1921 if (End.isInvalid()) {
1922 // Find the first non-null initializer from the end.
1923 for (InitExprsTy::const_reverse_iterator I = InitExprs.rbegin(),
1924 E = InitExprs.rend();
1927 End = S->getLocEnd();
1935 /// getFunctionType - Return the underlying function type for this block.
1937 const FunctionProtoType *BlockExpr::getFunctionType() const {
1938 // The block pointer is never sugared, but the function type might be.
1939 return cast<BlockPointerType>(getType())
1940 ->getPointeeType()->castAs<FunctionProtoType>();
1943 SourceLocation BlockExpr::getCaretLocation() const {
1944 return TheBlock->getCaretLocation();
1946 const Stmt *BlockExpr::getBody() const {
1947 return TheBlock->getBody();
1949 Stmt *BlockExpr::getBody() {
1950 return TheBlock->getBody();
1954 //===----------------------------------------------------------------------===//
1955 // Generic Expression Routines
1956 //===----------------------------------------------------------------------===//
1958 /// isUnusedResultAWarning - Return true if this immediate expression should
1959 /// be warned about if the result is unused. If so, fill in Loc and Ranges
1960 /// with location to warn on and the source range[s] to report with the
1962 bool Expr::isUnusedResultAWarning(const Expr *&WarnE, SourceLocation &Loc,
1963 SourceRange &R1, SourceRange &R2,
1964 ASTContext &Ctx) const {
1965 // Don't warn if the expr is type dependent. The type could end up
1966 // instantiating to void.
1967 if (isTypeDependent())
1970 switch (getStmtClass()) {
1972 if (getType()->isVoidType())
1976 R1 = getSourceRange();
1978 case ParenExprClass:
1979 return cast<ParenExpr>(this)->getSubExpr()->
1980 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
1981 case GenericSelectionExprClass:
1982 return cast<GenericSelectionExpr>(this)->getResultExpr()->
1983 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
1984 case ChooseExprClass:
1985 return cast<ChooseExpr>(this)->getChosenSubExpr()->
1986 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
1987 case UnaryOperatorClass: {
1988 const UnaryOperator *UO = cast<UnaryOperator>(this);
1990 switch (UO->getOpcode()) {
2001 case UO_PreDec: // ++/--
2002 return false; // Not a warning.
2005 // accessing a piece of a volatile complex is a side-effect.
2006 if (Ctx.getCanonicalType(UO->getSubExpr()->getType())
2007 .isVolatileQualified())
2011 return UO->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2014 Loc = UO->getOperatorLoc();
2015 R1 = UO->getSubExpr()->getSourceRange();
2018 case BinaryOperatorClass: {
2019 const BinaryOperator *BO = cast<BinaryOperator>(this);
2020 switch (BO->getOpcode()) {
2023 // Consider the RHS of comma for side effects. LHS was checked by
2024 // Sema::CheckCommaOperands.
2026 // ((foo = <blah>), 0) is an idiom for hiding the result (and
2027 // lvalue-ness) of an assignment written in a macro.
2028 if (IntegerLiteral *IE =
2029 dyn_cast<IntegerLiteral>(BO->getRHS()->IgnoreParens()))
2030 if (IE->getValue() == 0)
2032 return BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2033 // Consider '||', '&&' to have side effects if the LHS or RHS does.
2036 if (!BO->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) ||
2037 !BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2041 if (BO->isAssignmentOp())
2044 Loc = BO->getOperatorLoc();
2045 R1 = BO->getLHS()->getSourceRange();
2046 R2 = BO->getRHS()->getSourceRange();
2049 case CompoundAssignOperatorClass:
2050 case VAArgExprClass:
2051 case AtomicExprClass:
2054 case ConditionalOperatorClass: {
2055 // If only one of the LHS or RHS is a warning, the operator might
2056 // be being used for control flow. Only warn if both the LHS and
2057 // RHS are warnings.
2058 const ConditionalOperator *Exp = cast<ConditionalOperator>(this);
2059 if (!Exp->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2063 return Exp->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2066 case MemberExprClass:
2068 Loc = cast<MemberExpr>(this)->getMemberLoc();
2069 R1 = SourceRange(Loc, Loc);
2070 R2 = cast<MemberExpr>(this)->getBase()->getSourceRange();
2073 case ArraySubscriptExprClass:
2075 Loc = cast<ArraySubscriptExpr>(this)->getRBracketLoc();
2076 R1 = cast<ArraySubscriptExpr>(this)->getLHS()->getSourceRange();
2077 R2 = cast<ArraySubscriptExpr>(this)->getRHS()->getSourceRange();
2080 case CXXOperatorCallExprClass: {
2081 // We warn about operator== and operator!= even when user-defined operator
2082 // overloads as there is no reasonable way to define these such that they
2083 // have non-trivial, desirable side-effects. See the -Wunused-comparison
2084 // warning: these operators are commonly typo'ed, and so warning on them
2085 // provides additional value as well. If this list is updated,
2086 // DiagnoseUnusedComparison should be as well.
2087 const CXXOperatorCallExpr *Op = cast<CXXOperatorCallExpr>(this);
2088 if (Op->getOperator() == OO_EqualEqual ||
2089 Op->getOperator() == OO_ExclaimEqual) {
2091 Loc = Op->getOperatorLoc();
2092 R1 = Op->getSourceRange();
2096 // Fallthrough for generic call handling.
2099 case CXXMemberCallExprClass:
2100 case UserDefinedLiteralClass: {
2101 // If this is a direct call, get the callee.
2102 const CallExpr *CE = cast<CallExpr>(this);
2103 if (const Decl *FD = CE->getCalleeDecl()) {
2104 // If the callee has attribute pure, const, or warn_unused_result, warn
2105 // about it. void foo() { strlen("bar"); } should warn.
2107 // Note: If new cases are added here, DiagnoseUnusedExprResult should be
2108 // updated to match for QoI.
2109 if (FD->getAttr<WarnUnusedResultAttr>() ||
2110 FD->getAttr<PureAttr>() || FD->getAttr<ConstAttr>()) {
2112 Loc = CE->getCallee()->getLocStart();
2113 R1 = CE->getCallee()->getSourceRange();
2115 if (unsigned NumArgs = CE->getNumArgs())
2116 R2 = SourceRange(CE->getArg(0)->getLocStart(),
2117 CE->getArg(NumArgs-1)->getLocEnd());
2124 // If we don't know precisely what we're looking at, let's not warn.
2125 case UnresolvedLookupExprClass:
2126 case CXXUnresolvedConstructExprClass:
2129 case CXXTemporaryObjectExprClass:
2130 case CXXConstructExprClass: {
2131 if (const CXXRecordDecl *Type = getType()->getAsCXXRecordDecl()) {
2132 if (Type->hasAttr<WarnUnusedAttr>()) {
2134 Loc = getLocStart();
2135 R1 = getSourceRange();
2142 case ObjCMessageExprClass: {
2143 const ObjCMessageExpr *ME = cast<ObjCMessageExpr>(this);
2144 if (Ctx.getLangOpts().ObjCAutoRefCount &&
2145 ME->isInstanceMessage() &&
2146 !ME->getType()->isVoidType() &&
2147 ME->getMethodFamily() == OMF_init) {
2150 R1 = ME->getSourceRange();
2154 const ObjCMethodDecl *MD = ME->getMethodDecl();
2155 if (MD && MD->getAttr<WarnUnusedResultAttr>()) {
2163 case ObjCPropertyRefExprClass:
2166 R1 = getSourceRange();
2169 case PseudoObjectExprClass: {
2170 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
2172 // Only complain about things that have the form of a getter.
2173 if (isa<UnaryOperator>(PO->getSyntacticForm()) ||
2174 isa<BinaryOperator>(PO->getSyntacticForm()))
2179 R1 = getSourceRange();
2183 case StmtExprClass: {
2184 // Statement exprs don't logically have side effects themselves, but are
2185 // sometimes used in macros in ways that give them a type that is unused.
2186 // For example ({ blah; foo(); }) will end up with a type if foo has a type.
2187 // however, if the result of the stmt expr is dead, we don't want to emit a
2189 const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt();
2190 if (!CS->body_empty()) {
2191 if (const Expr *E = dyn_cast<Expr>(CS->body_back()))
2192 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2193 if (const LabelStmt *Label = dyn_cast<LabelStmt>(CS->body_back()))
2194 if (const Expr *E = dyn_cast<Expr>(Label->getSubStmt()))
2195 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2198 if (getType()->isVoidType())
2201 Loc = cast<StmtExpr>(this)->getLParenLoc();
2202 R1 = getSourceRange();
2205 case CXXFunctionalCastExprClass:
2206 case CStyleCastExprClass: {
2207 // Ignore an explicit cast to void unless the operand is a non-trivial
2209 const CastExpr *CE = cast<CastExpr>(this);
2210 if (CE->getCastKind() == CK_ToVoid) {
2211 if (CE->getSubExpr()->isGLValue() &&
2212 CE->getSubExpr()->getType().isVolatileQualified()) {
2213 const DeclRefExpr *DRE =
2214 dyn_cast<DeclRefExpr>(CE->getSubExpr()->IgnoreParens());
2215 if (!(DRE && isa<VarDecl>(DRE->getDecl()) &&
2216 cast<VarDecl>(DRE->getDecl())->hasLocalStorage())) {
2217 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc,
2224 // If this is a cast to a constructor conversion, check the operand.
2225 // Otherwise, the result of the cast is unused.
2226 if (CE->getCastKind() == CK_ConstructorConversion)
2227 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2230 if (const CXXFunctionalCastExpr *CXXCE =
2231 dyn_cast<CXXFunctionalCastExpr>(this)) {
2232 Loc = CXXCE->getLocStart();
2233 R1 = CXXCE->getSubExpr()->getSourceRange();
2235 const CStyleCastExpr *CStyleCE = cast<CStyleCastExpr>(this);
2236 Loc = CStyleCE->getLParenLoc();
2237 R1 = CStyleCE->getSubExpr()->getSourceRange();
2241 case ImplicitCastExprClass: {
2242 const CastExpr *ICE = cast<ImplicitCastExpr>(this);
2244 // lvalue-to-rvalue conversion on a volatile lvalue is a side-effect.
2245 if (ICE->getCastKind() == CK_LValueToRValue &&
2246 ICE->getSubExpr()->getType().isVolatileQualified())
2249 return ICE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2251 case CXXDefaultArgExprClass:
2252 return (cast<CXXDefaultArgExpr>(this)
2253 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2254 case CXXDefaultInitExprClass:
2255 return (cast<CXXDefaultInitExpr>(this)
2256 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2258 case CXXNewExprClass:
2259 // FIXME: In theory, there might be new expressions that don't have side
2260 // effects (e.g. a placement new with an uninitialized POD).
2261 case CXXDeleteExprClass:
2263 case CXXBindTemporaryExprClass:
2264 return (cast<CXXBindTemporaryExpr>(this)
2265 ->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2266 case ExprWithCleanupsClass:
2267 return (cast<ExprWithCleanups>(this)
2268 ->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2272 /// isOBJCGCCandidate - Check if an expression is objc gc'able.
2273 /// returns true, if it is; false otherwise.
2274 bool Expr::isOBJCGCCandidate(ASTContext &Ctx) const {
2275 const Expr *E = IgnoreParens();
2276 switch (E->getStmtClass()) {
2279 case ObjCIvarRefExprClass:
2281 case Expr::UnaryOperatorClass:
2282 return cast<UnaryOperator>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2283 case ImplicitCastExprClass:
2284 return cast<ImplicitCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2285 case MaterializeTemporaryExprClass:
2286 return cast<MaterializeTemporaryExpr>(E)->GetTemporaryExpr()
2287 ->isOBJCGCCandidate(Ctx);
2288 case CStyleCastExprClass:
2289 return cast<CStyleCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2290 case DeclRefExprClass: {
2291 const Decl *D = cast<DeclRefExpr>(E)->getDecl();
2293 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
2294 if (VD->hasGlobalStorage())
2296 QualType T = VD->getType();
2297 // dereferencing to a pointer is always a gc'able candidate,
2298 // unless it is __weak.
2299 return T->isPointerType() &&
2300 (Ctx.getObjCGCAttrKind(T) != Qualifiers::Weak);
2304 case MemberExprClass: {
2305 const MemberExpr *M = cast<MemberExpr>(E);
2306 return M->getBase()->isOBJCGCCandidate(Ctx);
2308 case ArraySubscriptExprClass:
2309 return cast<ArraySubscriptExpr>(E)->getBase()->isOBJCGCCandidate(Ctx);
2313 bool Expr::isBoundMemberFunction(ASTContext &Ctx) const {
2314 if (isTypeDependent())
2316 return ClassifyLValue(Ctx) == Expr::LV_MemberFunction;
2319 QualType Expr::findBoundMemberType(const Expr *expr) {
2320 assert(expr->hasPlaceholderType(BuiltinType::BoundMember));
2322 // Bound member expressions are always one of these possibilities:
2323 // x->m x.m x->*y x.*y
2324 // (possibly parenthesized)
2326 expr = expr->IgnoreParens();
2327 if (const MemberExpr *mem = dyn_cast<MemberExpr>(expr)) {
2328 assert(isa<CXXMethodDecl>(mem->getMemberDecl()));
2329 return mem->getMemberDecl()->getType();
2332 if (const BinaryOperator *op = dyn_cast<BinaryOperator>(expr)) {
2333 QualType type = op->getRHS()->getType()->castAs<MemberPointerType>()
2335 assert(type->isFunctionType());
2339 assert(isa<UnresolvedMemberExpr>(expr));
2343 Expr* Expr::IgnoreParens() {
2346 if (ParenExpr* P = dyn_cast<ParenExpr>(E)) {
2347 E = P->getSubExpr();
2350 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) {
2351 if (P->getOpcode() == UO_Extension) {
2352 E = P->getSubExpr();
2356 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) {
2357 if (!P->isResultDependent()) {
2358 E = P->getResultExpr();
2362 if (ChooseExpr* P = dyn_cast<ChooseExpr>(E)) {
2363 if (!P->isConditionDependent()) {
2364 E = P->getChosenSubExpr();
2372 /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr
2373 /// or CastExprs or ImplicitCastExprs, returning their operand.
2374 Expr *Expr::IgnoreParenCasts() {
2377 E = E->IgnoreParens();
2378 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2379 E = P->getSubExpr();
2382 if (MaterializeTemporaryExpr *Materialize
2383 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2384 E = Materialize->GetTemporaryExpr();
2387 if (SubstNonTypeTemplateParmExpr *NTTP
2388 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2389 E = NTTP->getReplacement();
2396 /// IgnoreParenLValueCasts - Ignore parentheses and lvalue-to-rvalue
2397 /// casts. This is intended purely as a temporary workaround for code
2398 /// that hasn't yet been rewritten to do the right thing about those
2399 /// casts, and may disappear along with the last internal use.
2400 Expr *Expr::IgnoreParenLValueCasts() {
2403 E = E->IgnoreParens();
2404 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2405 if (P->getCastKind() == CK_LValueToRValue) {
2406 E = P->getSubExpr();
2409 } else if (MaterializeTemporaryExpr *Materialize
2410 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2411 E = Materialize->GetTemporaryExpr();
2413 } else if (SubstNonTypeTemplateParmExpr *NTTP
2414 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2415 E = NTTP->getReplacement();
2423 Expr *Expr::ignoreParenBaseCasts() {
2426 E = E->IgnoreParens();
2427 if (CastExpr *CE = dyn_cast<CastExpr>(E)) {
2428 if (CE->getCastKind() == CK_DerivedToBase ||
2429 CE->getCastKind() == CK_UncheckedDerivedToBase ||
2430 CE->getCastKind() == CK_NoOp) {
2431 E = CE->getSubExpr();
2440 Expr *Expr::IgnoreParenImpCasts() {
2443 E = E->IgnoreParens();
2444 if (ImplicitCastExpr *P = dyn_cast<ImplicitCastExpr>(E)) {
2445 E = P->getSubExpr();
2448 if (MaterializeTemporaryExpr *Materialize
2449 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2450 E = Materialize->GetTemporaryExpr();
2453 if (SubstNonTypeTemplateParmExpr *NTTP
2454 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2455 E = NTTP->getReplacement();
2462 Expr *Expr::IgnoreConversionOperator() {
2463 if (CXXMemberCallExpr *MCE = dyn_cast<CXXMemberCallExpr>(this)) {
2464 if (MCE->getMethodDecl() && isa<CXXConversionDecl>(MCE->getMethodDecl()))
2465 return MCE->getImplicitObjectArgument();
2470 /// IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the
2471 /// value (including ptr->int casts of the same size). Strip off any
2472 /// ParenExpr or CastExprs, returning their operand.
2473 Expr *Expr::IgnoreParenNoopCasts(ASTContext &Ctx) {
2476 E = E->IgnoreParens();
2478 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2479 // We ignore integer <-> casts that are of the same width, ptr<->ptr and
2480 // ptr<->int casts of the same width. We also ignore all identity casts.
2481 Expr *SE = P->getSubExpr();
2483 if (Ctx.hasSameUnqualifiedType(E->getType(), SE->getType())) {
2488 if ((E->getType()->isPointerType() ||
2489 E->getType()->isIntegralType(Ctx)) &&
2490 (SE->getType()->isPointerType() ||
2491 SE->getType()->isIntegralType(Ctx)) &&
2492 Ctx.getTypeSize(E->getType()) == Ctx.getTypeSize(SE->getType())) {
2498 if (SubstNonTypeTemplateParmExpr *NTTP
2499 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2500 E = NTTP->getReplacement();
2508 bool Expr::isDefaultArgument() const {
2509 const Expr *E = this;
2510 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2511 E = M->GetTemporaryExpr();
2513 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E))
2514 E = ICE->getSubExprAsWritten();
2516 return isa<CXXDefaultArgExpr>(E);
2519 /// \brief Skip over any no-op casts and any temporary-binding
2521 static const Expr *skipTemporaryBindingsNoOpCastsAndParens(const Expr *E) {
2522 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2523 E = M->GetTemporaryExpr();
2525 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2526 if (ICE->getCastKind() == CK_NoOp)
2527 E = ICE->getSubExpr();
2532 while (const CXXBindTemporaryExpr *BE = dyn_cast<CXXBindTemporaryExpr>(E))
2533 E = BE->getSubExpr();
2535 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2536 if (ICE->getCastKind() == CK_NoOp)
2537 E = ICE->getSubExpr();
2542 return E->IgnoreParens();
2545 /// isTemporaryObject - Determines if this expression produces a
2546 /// temporary of the given class type.
2547 bool Expr::isTemporaryObject(ASTContext &C, const CXXRecordDecl *TempTy) const {
2548 if (!C.hasSameUnqualifiedType(getType(), C.getTypeDeclType(TempTy)))
2551 const Expr *E = skipTemporaryBindingsNoOpCastsAndParens(this);
2553 // Temporaries are by definition pr-values of class type.
2554 if (!E->Classify(C).isPRValue()) {
2555 // In this context, property reference is a message call and is pr-value.
2556 if (!isa<ObjCPropertyRefExpr>(E))
2560 // Black-list a few cases which yield pr-values of class type that don't
2561 // refer to temporaries of that type:
2563 // - implicit derived-to-base conversions
2564 if (isa<ImplicitCastExpr>(E)) {
2565 switch (cast<ImplicitCastExpr>(E)->getCastKind()) {
2566 case CK_DerivedToBase:
2567 case CK_UncheckedDerivedToBase:
2574 // - member expressions (all)
2575 if (isa<MemberExpr>(E))
2578 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E))
2579 if (BO->isPtrMemOp())
2582 // - opaque values (all)
2583 if (isa<OpaqueValueExpr>(E))
2589 bool Expr::isImplicitCXXThis() const {
2590 const Expr *E = this;
2592 // Strip away parentheses and casts we don't care about.
2594 if (const ParenExpr *Paren = dyn_cast<ParenExpr>(E)) {
2595 E = Paren->getSubExpr();
2599 if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2600 if (ICE->getCastKind() == CK_NoOp ||
2601 ICE->getCastKind() == CK_LValueToRValue ||
2602 ICE->getCastKind() == CK_DerivedToBase ||
2603 ICE->getCastKind() == CK_UncheckedDerivedToBase) {
2604 E = ICE->getSubExpr();
2609 if (const UnaryOperator* UnOp = dyn_cast<UnaryOperator>(E)) {
2610 if (UnOp->getOpcode() == UO_Extension) {
2611 E = UnOp->getSubExpr();
2616 if (const MaterializeTemporaryExpr *M
2617 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2618 E = M->GetTemporaryExpr();
2625 if (const CXXThisExpr *This = dyn_cast<CXXThisExpr>(E))
2626 return This->isImplicit();
2631 /// hasAnyTypeDependentArguments - Determines if any of the expressions
2632 /// in Exprs is type-dependent.
2633 bool Expr::hasAnyTypeDependentArguments(ArrayRef<Expr *> Exprs) {
2634 for (unsigned I = 0; I < Exprs.size(); ++I)
2635 if (Exprs[I]->isTypeDependent())
2641 bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef) const {
2642 // This function is attempting whether an expression is an initializer
2643 // which can be evaluated at compile-time. It very closely parallels
2644 // ConstExprEmitter in CGExprConstant.cpp; if they don't match, it
2645 // will lead to unexpected results. Like ConstExprEmitter, it falls back
2646 // to isEvaluatable most of the time.
2648 // If we ever capture reference-binding directly in the AST, we can
2649 // kill the second parameter.
2653 return EvaluateAsLValue(Result, Ctx) && !Result.HasSideEffects;
2656 switch (getStmtClass()) {
2658 case StringLiteralClass:
2659 case ObjCEncodeExprClass:
2661 case CXXTemporaryObjectExprClass:
2662 case CXXConstructExprClass: {
2663 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
2665 if (CE->getConstructor()->isTrivial() &&
2666 CE->getConstructor()->getParent()->hasTrivialDestructor()) {
2667 // Trivial default constructor
2668 if (!CE->getNumArgs()) return true;
2670 // Trivial copy constructor
2671 assert(CE->getNumArgs() == 1 && "trivial ctor with > 1 argument");
2672 return CE->getArg(0)->isConstantInitializer(Ctx, false);
2677 case CompoundLiteralExprClass: {
2678 // This handles gcc's extension that allows global initializers like
2679 // "struct x {int x;} x = (struct x) {};".
2680 // FIXME: This accepts other cases it shouldn't!
2681 const Expr *Exp = cast<CompoundLiteralExpr>(this)->getInitializer();
2682 return Exp->isConstantInitializer(Ctx, false);
2684 case InitListExprClass: {
2685 const InitListExpr *ILE = cast<InitListExpr>(this);
2686 if (ILE->getType()->isArrayType()) {
2687 unsigned numInits = ILE->getNumInits();
2688 for (unsigned i = 0; i < numInits; i++) {
2689 if (!ILE->getInit(i)->isConstantInitializer(Ctx, false))
2695 if (ILE->getType()->isRecordType()) {
2696 unsigned ElementNo = 0;
2697 RecordDecl *RD = ILE->getType()->getAs<RecordType>()->getDecl();
2698 for (RecordDecl::field_iterator Field = RD->field_begin(),
2699 FieldEnd = RD->field_end(); Field != FieldEnd; ++Field) {
2700 // If this is a union, skip all the fields that aren't being initialized.
2701 if (RD->isUnion() && ILE->getInitializedFieldInUnion() != *Field)
2704 // Don't emit anonymous bitfields, they just affect layout.
2705 if (Field->isUnnamedBitfield())
2708 if (ElementNo < ILE->getNumInits()) {
2709 const Expr *Elt = ILE->getInit(ElementNo++);
2710 if (Field->isBitField()) {
2711 // Bitfields have to evaluate to an integer.
2712 llvm::APSInt ResultTmp;
2713 if (!Elt->EvaluateAsInt(ResultTmp, Ctx))
2716 bool RefType = Field->getType()->isReferenceType();
2717 if (!Elt->isConstantInitializer(Ctx, RefType))
2727 case ImplicitValueInitExprClass:
2729 case ParenExprClass:
2730 return cast<ParenExpr>(this)->getSubExpr()
2731 ->isConstantInitializer(Ctx, IsForRef);
2732 case GenericSelectionExprClass:
2733 return cast<GenericSelectionExpr>(this)->getResultExpr()
2734 ->isConstantInitializer(Ctx, IsForRef);
2735 case ChooseExprClass:
2736 if (cast<ChooseExpr>(this)->isConditionDependent())
2738 return cast<ChooseExpr>(this)->getChosenSubExpr()
2739 ->isConstantInitializer(Ctx, IsForRef);
2740 case UnaryOperatorClass: {
2741 const UnaryOperator* Exp = cast<UnaryOperator>(this);
2742 if (Exp->getOpcode() == UO_Extension)
2743 return Exp->getSubExpr()->isConstantInitializer(Ctx, false);
2746 case CXXFunctionalCastExprClass:
2747 case CXXStaticCastExprClass:
2748 case ImplicitCastExprClass:
2749 case CStyleCastExprClass:
2750 case ObjCBridgedCastExprClass:
2751 case CXXDynamicCastExprClass:
2752 case CXXReinterpretCastExprClass:
2753 case CXXConstCastExprClass: {
2754 const CastExpr *CE = cast<CastExpr>(this);
2756 // Handle misc casts we want to ignore.
2757 if (CE->getCastKind() == CK_NoOp ||
2758 CE->getCastKind() == CK_LValueToRValue ||
2759 CE->getCastKind() == CK_ToUnion ||
2760 CE->getCastKind() == CK_ConstructorConversion ||
2761 CE->getCastKind() == CK_NonAtomicToAtomic ||
2762 CE->getCastKind() == CK_AtomicToNonAtomic)
2763 return CE->getSubExpr()->isConstantInitializer(Ctx, false);
2767 case MaterializeTemporaryExprClass:
2768 return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
2769 ->isConstantInitializer(Ctx, false);
2771 case SubstNonTypeTemplateParmExprClass:
2772 return cast<SubstNonTypeTemplateParmExpr>(this)->getReplacement()
2773 ->isConstantInitializer(Ctx, false);
2774 case CXXDefaultArgExprClass:
2775 return cast<CXXDefaultArgExpr>(this)->getExpr()
2776 ->isConstantInitializer(Ctx, false);
2777 case CXXDefaultInitExprClass:
2778 return cast<CXXDefaultInitExpr>(this)->getExpr()
2779 ->isConstantInitializer(Ctx, false);
2781 return isEvaluatable(Ctx);
2784 bool Expr::HasSideEffects(const ASTContext &Ctx) const {
2785 if (isInstantiationDependent())
2788 switch (getStmtClass()) {
2790 #define ABSTRACT_STMT(Type)
2791 #define STMT(Type, Base) case Type##Class:
2792 #define EXPR(Type, Base)
2793 #include "clang/AST/StmtNodes.inc"
2794 llvm_unreachable("unexpected Expr kind");
2796 case DependentScopeDeclRefExprClass:
2797 case CXXUnresolvedConstructExprClass:
2798 case CXXDependentScopeMemberExprClass:
2799 case UnresolvedLookupExprClass:
2800 case UnresolvedMemberExprClass:
2801 case PackExpansionExprClass:
2802 case SubstNonTypeTemplateParmPackExprClass:
2803 case FunctionParmPackExprClass:
2804 llvm_unreachable("shouldn't see dependent / unresolved nodes here");
2806 case DeclRefExprClass:
2807 case ObjCIvarRefExprClass:
2808 case PredefinedExprClass:
2809 case IntegerLiteralClass:
2810 case FloatingLiteralClass:
2811 case ImaginaryLiteralClass:
2812 case StringLiteralClass:
2813 case CharacterLiteralClass:
2814 case OffsetOfExprClass:
2815 case ImplicitValueInitExprClass:
2816 case UnaryExprOrTypeTraitExprClass:
2817 case AddrLabelExprClass:
2818 case GNUNullExprClass:
2819 case CXXBoolLiteralExprClass:
2820 case CXXNullPtrLiteralExprClass:
2821 case CXXThisExprClass:
2822 case CXXScalarValueInitExprClass:
2823 case TypeTraitExprClass:
2824 case UnaryTypeTraitExprClass:
2825 case BinaryTypeTraitExprClass:
2826 case ArrayTypeTraitExprClass:
2827 case ExpressionTraitExprClass:
2828 case CXXNoexceptExprClass:
2829 case SizeOfPackExprClass:
2830 case ObjCStringLiteralClass:
2831 case ObjCEncodeExprClass:
2832 case ObjCBoolLiteralExprClass:
2833 case CXXUuidofExprClass:
2834 case OpaqueValueExprClass:
2835 // These never have a side-effect.
2839 case MSPropertyRefExprClass:
2840 case CompoundAssignOperatorClass:
2841 case VAArgExprClass:
2842 case AtomicExprClass:
2844 case CXXOperatorCallExprClass:
2845 case CXXMemberCallExprClass:
2846 case UserDefinedLiteralClass:
2847 case CXXThrowExprClass:
2848 case CXXNewExprClass:
2849 case CXXDeleteExprClass:
2850 case ExprWithCleanupsClass:
2851 case CXXBindTemporaryExprClass:
2852 case BlockExprClass:
2853 case CUDAKernelCallExprClass:
2854 // These always have a side-effect.
2857 case ParenExprClass:
2858 case ArraySubscriptExprClass:
2859 case MemberExprClass:
2860 case ConditionalOperatorClass:
2861 case BinaryConditionalOperatorClass:
2862 case CompoundLiteralExprClass:
2863 case ExtVectorElementExprClass:
2864 case DesignatedInitExprClass:
2865 case ParenListExprClass:
2866 case CXXPseudoDestructorExprClass:
2867 case CXXStdInitializerListExprClass:
2868 case SubstNonTypeTemplateParmExprClass:
2869 case MaterializeTemporaryExprClass:
2870 case ShuffleVectorExprClass:
2871 case ConvertVectorExprClass:
2872 case AsTypeExprClass:
2873 // These have a side-effect if any subexpression does.
2876 case UnaryOperatorClass:
2877 if (cast<UnaryOperator>(this)->isIncrementDecrementOp())
2881 case BinaryOperatorClass:
2882 if (cast<BinaryOperator>(this)->isAssignmentOp())
2886 case InitListExprClass:
2887 // FIXME: The children for an InitListExpr doesn't include the array filler.
2888 if (const Expr *E = cast<InitListExpr>(this)->getArrayFiller())
2889 if (E->HasSideEffects(Ctx))
2893 case GenericSelectionExprClass:
2894 return cast<GenericSelectionExpr>(this)->getResultExpr()->
2895 HasSideEffects(Ctx);
2897 case ChooseExprClass:
2898 return cast<ChooseExpr>(this)->getChosenSubExpr()->HasSideEffects(Ctx);
2900 case CXXDefaultArgExprClass:
2901 return cast<CXXDefaultArgExpr>(this)->getExpr()->HasSideEffects(Ctx);
2903 case CXXDefaultInitExprClass:
2904 if (const Expr *E = cast<CXXDefaultInitExpr>(this)->getExpr())
2905 return E->HasSideEffects(Ctx);
2906 // If we've not yet parsed the initializer, assume it has side-effects.
2909 case CXXDynamicCastExprClass: {
2910 // A dynamic_cast expression has side-effects if it can throw.
2911 const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(this);
2912 if (DCE->getTypeAsWritten()->isReferenceType() &&
2913 DCE->getCastKind() == CK_Dynamic)
2916 case ImplicitCastExprClass:
2917 case CStyleCastExprClass:
2918 case CXXStaticCastExprClass:
2919 case CXXReinterpretCastExprClass:
2920 case CXXConstCastExprClass:
2921 case CXXFunctionalCastExprClass: {
2922 const CastExpr *CE = cast<CastExpr>(this);
2923 if (CE->getCastKind() == CK_LValueToRValue &&
2924 CE->getSubExpr()->getType().isVolatileQualified())
2929 case CXXTypeidExprClass:
2930 // typeid might throw if its subexpression is potentially-evaluated, so has
2931 // side-effects in that case whether or not its subexpression does.
2932 return cast<CXXTypeidExpr>(this)->isPotentiallyEvaluated();
2934 case CXXConstructExprClass:
2935 case CXXTemporaryObjectExprClass: {
2936 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
2937 if (!CE->getConstructor()->isTrivial())
2939 // A trivial constructor does not add any side-effects of its own. Just look
2940 // at its arguments.
2944 case LambdaExprClass: {
2945 const LambdaExpr *LE = cast<LambdaExpr>(this);
2946 for (LambdaExpr::capture_iterator I = LE->capture_begin(),
2947 E = LE->capture_end(); I != E; ++I)
2948 if (I->getCaptureKind() == LCK_ByCopy)
2949 // FIXME: Only has a side-effect if the variable is volatile or if
2950 // the copy would invoke a non-trivial copy constructor.
2955 case PseudoObjectExprClass: {
2956 // Only look for side-effects in the semantic form, and look past
2957 // OpaqueValueExpr bindings in that form.
2958 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
2959 for (PseudoObjectExpr::const_semantics_iterator I = PO->semantics_begin(),
2960 E = PO->semantics_end();
2962 const Expr *Subexpr = *I;
2963 if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(Subexpr))
2964 Subexpr = OVE->getSourceExpr();
2965 if (Subexpr->HasSideEffects(Ctx))
2971 case ObjCBoxedExprClass:
2972 case ObjCArrayLiteralClass:
2973 case ObjCDictionaryLiteralClass:
2974 case ObjCMessageExprClass:
2975 case ObjCSelectorExprClass:
2976 case ObjCProtocolExprClass:
2977 case ObjCPropertyRefExprClass:
2978 case ObjCIsaExprClass:
2979 case ObjCIndirectCopyRestoreExprClass:
2980 case ObjCSubscriptRefExprClass:
2981 case ObjCBridgedCastExprClass:
2982 // FIXME: Classify these cases better.
2986 // Recurse to children.
2987 for (const_child_range SubStmts = children(); SubStmts; ++SubStmts)
2988 if (const Stmt *S = *SubStmts)
2989 if (cast<Expr>(S)->HasSideEffects(Ctx))
2996 /// \brief Look for a call to a non-trivial function within an expression.
2997 class NonTrivialCallFinder : public EvaluatedExprVisitor<NonTrivialCallFinder>
2999 typedef EvaluatedExprVisitor<NonTrivialCallFinder> Inherited;
3004 explicit NonTrivialCallFinder(ASTContext &Context)
3005 : Inherited(Context), NonTrivial(false) { }
3007 bool hasNonTrivialCall() const { return NonTrivial; }
3009 void VisitCallExpr(CallExpr *E) {
3010 if (CXXMethodDecl *Method
3011 = dyn_cast_or_null<CXXMethodDecl>(E->getCalleeDecl())) {
3012 if (Method->isTrivial()) {
3013 // Recurse to children of the call.
3014 Inherited::VisitStmt(E);
3022 void VisitCXXConstructExpr(CXXConstructExpr *E) {
3023 if (E->getConstructor()->isTrivial()) {
3024 // Recurse to children of the call.
3025 Inherited::VisitStmt(E);
3032 void VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) {
3033 if (E->getTemporary()->getDestructor()->isTrivial()) {
3034 Inherited::VisitStmt(E);
3043 bool Expr::hasNonTrivialCall(ASTContext &Ctx) {
3044 NonTrivialCallFinder Finder(Ctx);
3046 return Finder.hasNonTrivialCall();
3049 /// isNullPointerConstant - C99 6.3.2.3p3 - Return whether this is a null
3050 /// pointer constant or not, as well as the specific kind of constant detected.
3051 /// Null pointer constants can be integer constant expressions with the
3052 /// value zero, casts of zero to void*, nullptr (C++0X), or __null
3053 /// (a GNU extension).
3054 Expr::NullPointerConstantKind
3055 Expr::isNullPointerConstant(ASTContext &Ctx,
3056 NullPointerConstantValueDependence NPC) const {
3057 if (isValueDependent() &&
3058 (!Ctx.getLangOpts().CPlusPlus11 || Ctx.getLangOpts().MicrosoftMode)) {
3060 case NPC_NeverValueDependent:
3061 llvm_unreachable("Unexpected value dependent expression!");
3062 case NPC_ValueDependentIsNull:
3063 if (isTypeDependent() || getType()->isIntegralType(Ctx))
3064 return NPCK_ZeroExpression;
3066 return NPCK_NotNull;
3068 case NPC_ValueDependentIsNotNull:
3069 return NPCK_NotNull;
3073 // Strip off a cast to void*, if it exists. Except in C++.
3074 if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) {
3075 if (!Ctx.getLangOpts().CPlusPlus) {
3076 // Check that it is a cast to void*.
3077 if (const PointerType *PT = CE->getType()->getAs<PointerType>()) {
3078 QualType Pointee = PT->getPointeeType();
3079 if (!Pointee.hasQualifiers() &&
3080 Pointee->isVoidType() && // to void*
3081 CE->getSubExpr()->getType()->isIntegerType()) // from int.
3082 return CE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3085 } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) {
3086 // Ignore the ImplicitCastExpr type entirely.
3087 return ICE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3088 } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) {
3089 // Accept ((void*)0) as a null pointer constant, as many other
3090 // implementations do.
3091 return PE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3092 } else if (const GenericSelectionExpr *GE =
3093 dyn_cast<GenericSelectionExpr>(this)) {
3094 if (GE->isResultDependent())
3095 return NPCK_NotNull;
3096 return GE->getResultExpr()->isNullPointerConstant(Ctx, NPC);
3097 } else if (const ChooseExpr *CE = dyn_cast<ChooseExpr>(this)) {
3098 if (CE->isConditionDependent())
3099 return NPCK_NotNull;
3100 return CE->getChosenSubExpr()->isNullPointerConstant(Ctx, NPC);
3101 } else if (const CXXDefaultArgExpr *DefaultArg
3102 = dyn_cast<CXXDefaultArgExpr>(this)) {
3103 // See through default argument expressions.
3104 return DefaultArg->getExpr()->isNullPointerConstant(Ctx, NPC);
3105 } else if (const CXXDefaultInitExpr *DefaultInit
3106 = dyn_cast<CXXDefaultInitExpr>(this)) {
3107 // See through default initializer expressions.
3108 return DefaultInit->getExpr()->isNullPointerConstant(Ctx, NPC);
3109 } else if (isa<GNUNullExpr>(this)) {
3110 // The GNU __null extension is always a null pointer constant.
3111 return NPCK_GNUNull;
3112 } else if (const MaterializeTemporaryExpr *M
3113 = dyn_cast<MaterializeTemporaryExpr>(this)) {
3114 return M->GetTemporaryExpr()->isNullPointerConstant(Ctx, NPC);
3115 } else if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(this)) {
3116 if (const Expr *Source = OVE->getSourceExpr())
3117 return Source->isNullPointerConstant(Ctx, NPC);
3120 // C++11 nullptr_t is always a null pointer constant.
3121 if (getType()->isNullPtrType())
3122 return NPCK_CXX11_nullptr;
3124 if (const RecordType *UT = getType()->getAsUnionType())
3125 if (!Ctx.getLangOpts().CPlusPlus11 &&
3126 UT && UT->getDecl()->hasAttr<TransparentUnionAttr>())
3127 if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(this)){
3128 const Expr *InitExpr = CLE->getInitializer();
3129 if (const InitListExpr *ILE = dyn_cast<InitListExpr>(InitExpr))
3130 return ILE->getInit(0)->isNullPointerConstant(Ctx, NPC);
3132 // This expression must be an integer type.
3133 if (!getType()->isIntegerType() ||
3134 (Ctx.getLangOpts().CPlusPlus && getType()->isEnumeralType()))
3135 return NPCK_NotNull;
3137 if (Ctx.getLangOpts().CPlusPlus11) {
3138 // C++11 [conv.ptr]p1: A null pointer constant is an integer literal with
3139 // value zero or a prvalue of type std::nullptr_t.
3140 // Microsoft mode permits C++98 rules reflecting MSVC behavior.
3141 const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(this);
3142 if (Lit && !Lit->getValue())
3143 return NPCK_ZeroLiteral;
3144 else if (!Ctx.getLangOpts().MicrosoftMode ||
3145 !isCXX98IntegralConstantExpr(Ctx))
3146 return NPCK_NotNull;
3148 // If we have an integer constant expression, we need to *evaluate* it and
3149 // test for the value 0.
3150 if (!isIntegerConstantExpr(Ctx))
3151 return NPCK_NotNull;
3154 if (EvaluateKnownConstInt(Ctx) != 0)
3155 return NPCK_NotNull;
3157 if (isa<IntegerLiteral>(this))
3158 return NPCK_ZeroLiteral;
3159 return NPCK_ZeroExpression;
3162 /// \brief If this expression is an l-value for an Objective C
3163 /// property, find the underlying property reference expression.
3164 const ObjCPropertyRefExpr *Expr::getObjCProperty() const {
3165 const Expr *E = this;
3167 assert((E->getValueKind() == VK_LValue &&
3168 E->getObjectKind() == OK_ObjCProperty) &&
3169 "expression is not a property reference");
3170 E = E->IgnoreParenCasts();
3171 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
3172 if (BO->getOpcode() == BO_Comma) {
3181 return cast<ObjCPropertyRefExpr>(E);
3184 bool Expr::isObjCSelfExpr() const {
3185 const Expr *E = IgnoreParenImpCasts();
3187 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E);
3191 const ImplicitParamDecl *Param = dyn_cast<ImplicitParamDecl>(DRE->getDecl());
3195 const ObjCMethodDecl *M = dyn_cast<ObjCMethodDecl>(Param->getDeclContext());
3199 return M->getSelfDecl() == Param;
3202 FieldDecl *Expr::getSourceBitField() {
3203 Expr *E = this->IgnoreParens();
3205 while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3206 if (ICE->getCastKind() == CK_LValueToRValue ||
3207 (ICE->getValueKind() != VK_RValue && ICE->getCastKind() == CK_NoOp))
3208 E = ICE->getSubExpr()->IgnoreParens();
3213 if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E))
3214 if (FieldDecl *Field = dyn_cast<FieldDecl>(MemRef->getMemberDecl()))
3215 if (Field->isBitField())
3218 if (ObjCIvarRefExpr *IvarRef = dyn_cast<ObjCIvarRefExpr>(E))
3219 if (FieldDecl *Ivar = dyn_cast<FieldDecl>(IvarRef->getDecl()))
3220 if (Ivar->isBitField())
3223 if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E))
3224 if (FieldDecl *Field = dyn_cast<FieldDecl>(DeclRef->getDecl()))
3225 if (Field->isBitField())
3228 if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(E)) {
3229 if (BinOp->isAssignmentOp() && BinOp->getLHS())
3230 return BinOp->getLHS()->getSourceBitField();
3232 if (BinOp->getOpcode() == BO_Comma && BinOp->getRHS())
3233 return BinOp->getRHS()->getSourceBitField();
3239 bool Expr::refersToVectorElement() const {
3240 const Expr *E = this->IgnoreParens();
3242 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3243 if (ICE->getValueKind() != VK_RValue &&
3244 ICE->getCastKind() == CK_NoOp)
3245 E = ICE->getSubExpr()->IgnoreParens();
3250 if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E))
3251 return ASE->getBase()->getType()->isVectorType();
3253 if (isa<ExtVectorElementExpr>(E))
3259 /// isArrow - Return true if the base expression is a pointer to vector,
3260 /// return false if the base expression is a vector.
3261 bool ExtVectorElementExpr::isArrow() const {
3262 return getBase()->getType()->isPointerType();
3265 unsigned ExtVectorElementExpr::getNumElements() const {
3266 if (const VectorType *VT = getType()->getAs<VectorType>())
3267 return VT->getNumElements();
3271 /// containsDuplicateElements - Return true if any element access is repeated.
3272 bool ExtVectorElementExpr::containsDuplicateElements() const {
3273 // FIXME: Refactor this code to an accessor on the AST node which returns the
3274 // "type" of component access, and share with code below and in Sema.
3275 StringRef Comp = Accessor->getName();
3277 // Halving swizzles do not contain duplicate elements.
3278 if (Comp == "hi" || Comp == "lo" || Comp == "even" || Comp == "odd")
3281 // Advance past s-char prefix on hex swizzles.
3282 if (Comp[0] == 's' || Comp[0] == 'S')
3283 Comp = Comp.substr(1);
3285 for (unsigned i = 0, e = Comp.size(); i != e; ++i)
3286 if (Comp.substr(i + 1).find(Comp[i]) != StringRef::npos)
3292 /// getEncodedElementAccess - We encode the fields as a llvm ConstantArray.
3293 void ExtVectorElementExpr::getEncodedElementAccess(
3294 SmallVectorImpl<unsigned> &Elts) const {
3295 StringRef Comp = Accessor->getName();
3296 if (Comp[0] == 's' || Comp[0] == 'S')
3297 Comp = Comp.substr(1);
3299 bool isHi = Comp == "hi";
3300 bool isLo = Comp == "lo";
3301 bool isEven = Comp == "even";
3302 bool isOdd = Comp == "odd";
3304 for (unsigned i = 0, e = getNumElements(); i != e; ++i) {
3316 Index = ExtVectorType::getAccessorIdx(Comp[i]);
3318 Elts.push_back(Index);
3322 ObjCMessageExpr::ObjCMessageExpr(QualType T,
3324 SourceLocation LBracLoc,
3325 SourceLocation SuperLoc,
3326 bool IsInstanceSuper,
3329 ArrayRef<SourceLocation> SelLocs,
3330 SelectorLocationsKind SelLocsK,
3331 ObjCMethodDecl *Method,
3332 ArrayRef<Expr *> Args,
3333 SourceLocation RBracLoc,
3335 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary,
3336 /*TypeDependent=*/false, /*ValueDependent=*/false,
3337 /*InstantiationDependent=*/false,
3338 /*ContainsUnexpandedParameterPack=*/false),
3339 SelectorOrMethod(reinterpret_cast<uintptr_t>(Method? Method
3340 : Sel.getAsOpaquePtr())),
3341 Kind(IsInstanceSuper? SuperInstance : SuperClass),
3342 HasMethod(Method != 0), IsDelegateInitCall(false), IsImplicit(isImplicit),
3343 SuperLoc(SuperLoc), LBracLoc(LBracLoc), RBracLoc(RBracLoc)
3345 initArgsAndSelLocs(Args, SelLocs, SelLocsK);
3346 setReceiverPointer(SuperType.getAsOpaquePtr());
3349 ObjCMessageExpr::ObjCMessageExpr(QualType T,
3351 SourceLocation LBracLoc,
3352 TypeSourceInfo *Receiver,
3354 ArrayRef<SourceLocation> SelLocs,
3355 SelectorLocationsKind SelLocsK,
3356 ObjCMethodDecl *Method,
3357 ArrayRef<Expr *> Args,
3358 SourceLocation RBracLoc,
3360 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary, T->isDependentType(),
3361 T->isDependentType(), T->isInstantiationDependentType(),
3362 T->containsUnexpandedParameterPack()),
3363 SelectorOrMethod(reinterpret_cast<uintptr_t>(Method? Method
3364 : Sel.getAsOpaquePtr())),
3366 HasMethod(Method != 0), IsDelegateInitCall(false), IsImplicit(isImplicit),
3367 LBracLoc(LBracLoc), RBracLoc(RBracLoc)
3369 initArgsAndSelLocs(Args, SelLocs, SelLocsK);
3370 setReceiverPointer(Receiver);
3373 ObjCMessageExpr::ObjCMessageExpr(QualType T,
3375 SourceLocation LBracLoc,
3378 ArrayRef<SourceLocation> SelLocs,
3379 SelectorLocationsKind SelLocsK,
3380 ObjCMethodDecl *Method,
3381 ArrayRef<Expr *> Args,
3382 SourceLocation RBracLoc,
3384 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary, Receiver->isTypeDependent(),
3385 Receiver->isTypeDependent(),
3386 Receiver->isInstantiationDependent(),
3387 Receiver->containsUnexpandedParameterPack()),
3388 SelectorOrMethod(reinterpret_cast<uintptr_t>(Method? Method
3389 : Sel.getAsOpaquePtr())),
3391 HasMethod(Method != 0), IsDelegateInitCall(false), IsImplicit(isImplicit),
3392 LBracLoc(LBracLoc), RBracLoc(RBracLoc)
3394 initArgsAndSelLocs(Args, SelLocs, SelLocsK);
3395 setReceiverPointer(Receiver);
3398 void ObjCMessageExpr::initArgsAndSelLocs(ArrayRef<Expr *> Args,
3399 ArrayRef<SourceLocation> SelLocs,
3400 SelectorLocationsKind SelLocsK) {
3401 setNumArgs(Args.size());
3402 Expr **MyArgs = getArgs();
3403 for (unsigned I = 0; I != Args.size(); ++I) {
3404 if (Args[I]->isTypeDependent())
3405 ExprBits.TypeDependent = true;
3406 if (Args[I]->isValueDependent())
3407 ExprBits.ValueDependent = true;
3408 if (Args[I]->isInstantiationDependent())
3409 ExprBits.InstantiationDependent = true;
3410 if (Args[I]->containsUnexpandedParameterPack())
3411 ExprBits.ContainsUnexpandedParameterPack = true;
3413 MyArgs[I] = Args[I];
3416 SelLocsKind = SelLocsK;
3417 if (!isImplicit()) {
3418 if (SelLocsK == SelLoc_NonStandard)
3419 std::copy(SelLocs.begin(), SelLocs.end(), getStoredSelLocs());
3423 ObjCMessageExpr *ObjCMessageExpr::Create(const ASTContext &Context, QualType T,
3425 SourceLocation LBracLoc,
3426 SourceLocation SuperLoc,
3427 bool IsInstanceSuper,
3430 ArrayRef<SourceLocation> SelLocs,
3431 ObjCMethodDecl *Method,
3432 ArrayRef<Expr *> Args,
3433 SourceLocation RBracLoc,
3435 assert((!SelLocs.empty() || isImplicit) &&
3436 "No selector locs for non-implicit message");
3437 ObjCMessageExpr *Mem;
3438 SelectorLocationsKind SelLocsK = SelectorLocationsKind();
3440 Mem = alloc(Context, Args.size(), 0);
3442 Mem = alloc(Context, Args, RBracLoc, SelLocs, Sel, SelLocsK);
3443 return new (Mem) ObjCMessageExpr(T, VK, LBracLoc, SuperLoc, IsInstanceSuper,
3444 SuperType, Sel, SelLocs, SelLocsK,
3445 Method, Args, RBracLoc, isImplicit);
3448 ObjCMessageExpr *ObjCMessageExpr::Create(const ASTContext &Context, QualType T,
3450 SourceLocation LBracLoc,
3451 TypeSourceInfo *Receiver,
3453 ArrayRef<SourceLocation> SelLocs,
3454 ObjCMethodDecl *Method,
3455 ArrayRef<Expr *> Args,
3456 SourceLocation RBracLoc,
3458 assert((!SelLocs.empty() || isImplicit) &&
3459 "No selector locs for non-implicit message");
3460 ObjCMessageExpr *Mem;
3461 SelectorLocationsKind SelLocsK = SelectorLocationsKind();
3463 Mem = alloc(Context, Args.size(), 0);
3465 Mem = alloc(Context, Args, RBracLoc, SelLocs, Sel, SelLocsK);
3466 return new (Mem) ObjCMessageExpr(T, VK, LBracLoc, Receiver, Sel,
3467 SelLocs, SelLocsK, Method, Args, RBracLoc,
3471 ObjCMessageExpr *ObjCMessageExpr::Create(const ASTContext &Context, QualType T,
3473 SourceLocation LBracLoc,
3476 ArrayRef<SourceLocation> SelLocs,
3477 ObjCMethodDecl *Method,
3478 ArrayRef<Expr *> Args,
3479 SourceLocation RBracLoc,
3481 assert((!SelLocs.empty() || isImplicit) &&
3482 "No selector locs for non-implicit message");
3483 ObjCMessageExpr *Mem;
3484 SelectorLocationsKind SelLocsK = SelectorLocationsKind();
3486 Mem = alloc(Context, Args.size(), 0);
3488 Mem = alloc(Context, Args, RBracLoc, SelLocs, Sel, SelLocsK);
3489 return new (Mem) ObjCMessageExpr(T, VK, LBracLoc, Receiver, Sel,
3490 SelLocs, SelLocsK, Method, Args, RBracLoc,
3494 ObjCMessageExpr *ObjCMessageExpr::CreateEmpty(const ASTContext &Context,
3496 unsigned NumStoredSelLocs) {
3497 ObjCMessageExpr *Mem = alloc(Context, NumArgs, NumStoredSelLocs);
3498 return new (Mem) ObjCMessageExpr(EmptyShell(), NumArgs);
3501 ObjCMessageExpr *ObjCMessageExpr::alloc(const ASTContext &C,
3502 ArrayRef<Expr *> Args,
3503 SourceLocation RBraceLoc,
3504 ArrayRef<SourceLocation> SelLocs,
3506 SelectorLocationsKind &SelLocsK) {
3507 SelLocsK = hasStandardSelectorLocs(Sel, SelLocs, Args, RBraceLoc);
3508 unsigned NumStoredSelLocs = (SelLocsK == SelLoc_NonStandard) ? SelLocs.size()
3510 return alloc(C, Args.size(), NumStoredSelLocs);
3513 ObjCMessageExpr *ObjCMessageExpr::alloc(const ASTContext &C,
3515 unsigned NumStoredSelLocs) {
3516 unsigned Size = sizeof(ObjCMessageExpr) + sizeof(void *) +
3517 NumArgs * sizeof(Expr *) + NumStoredSelLocs * sizeof(SourceLocation);
3518 return (ObjCMessageExpr *)C.Allocate(Size,
3519 llvm::AlignOf<ObjCMessageExpr>::Alignment);
3522 void ObjCMessageExpr::getSelectorLocs(
3523 SmallVectorImpl<SourceLocation> &SelLocs) const {
3524 for (unsigned i = 0, e = getNumSelectorLocs(); i != e; ++i)
3525 SelLocs.push_back(getSelectorLoc(i));
3528 SourceRange ObjCMessageExpr::getReceiverRange() const {
3529 switch (getReceiverKind()) {
3531 return getInstanceReceiver()->getSourceRange();
3534 return getClassReceiverTypeInfo()->getTypeLoc().getSourceRange();
3538 return getSuperLoc();
3541 llvm_unreachable("Invalid ReceiverKind!");
3544 Selector ObjCMessageExpr::getSelector() const {
3546 return reinterpret_cast<const ObjCMethodDecl *>(SelectorOrMethod)
3548 return Selector(SelectorOrMethod);
3551 QualType ObjCMessageExpr::getReceiverType() const {
3552 switch (getReceiverKind()) {
3554 return getInstanceReceiver()->getType();
3556 return getClassReceiver();
3559 return getSuperType();
3562 llvm_unreachable("unexpected receiver kind");
3565 ObjCInterfaceDecl *ObjCMessageExpr::getReceiverInterface() const {
3566 QualType T = getReceiverType();
3568 if (const ObjCObjectPointerType *Ptr = T->getAs<ObjCObjectPointerType>())
3569 return Ptr->getInterfaceDecl();
3571 if (const ObjCObjectType *Ty = T->getAs<ObjCObjectType>())
3572 return Ty->getInterface();
3577 StringRef ObjCBridgedCastExpr::getBridgeKindName() const {
3578 switch (getBridgeKind()) {
3581 case OBC_BridgeTransfer:
3582 return "__bridge_transfer";
3583 case OBC_BridgeRetained:
3584 return "__bridge_retained";
3587 llvm_unreachable("Invalid BridgeKind!");
3590 ShuffleVectorExpr::ShuffleVectorExpr(const ASTContext &C, ArrayRef<Expr*> args,
3591 QualType Type, SourceLocation BLoc,
3593 : Expr(ShuffleVectorExprClass, Type, VK_RValue, OK_Ordinary,
3594 Type->isDependentType(), Type->isDependentType(),
3595 Type->isInstantiationDependentType(),
3596 Type->containsUnexpandedParameterPack()),
3597 BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(args.size())
3599 SubExprs = new (C) Stmt*[args.size()];
3600 for (unsigned i = 0; i != args.size(); i++) {
3601 if (args[i]->isTypeDependent())
3602 ExprBits.TypeDependent = true;
3603 if (args[i]->isValueDependent())
3604 ExprBits.ValueDependent = true;
3605 if (args[i]->isInstantiationDependent())
3606 ExprBits.InstantiationDependent = true;
3607 if (args[i]->containsUnexpandedParameterPack())
3608 ExprBits.ContainsUnexpandedParameterPack = true;
3610 SubExprs[i] = args[i];
3614 void ShuffleVectorExpr::setExprs(const ASTContext &C, ArrayRef<Expr *> Exprs) {
3615 if (SubExprs) C.Deallocate(SubExprs);
3617 this->NumExprs = Exprs.size();
3618 SubExprs = new (C) Stmt*[NumExprs];
3619 memcpy(SubExprs, Exprs.data(), sizeof(Expr *) * Exprs.size());
3622 GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
3623 SourceLocation GenericLoc, Expr *ControllingExpr,
3624 ArrayRef<TypeSourceInfo*> AssocTypes,
3625 ArrayRef<Expr*> AssocExprs,
3626 SourceLocation DefaultLoc,
3627 SourceLocation RParenLoc,
3628 bool ContainsUnexpandedParameterPack,
3629 unsigned ResultIndex)
3630 : Expr(GenericSelectionExprClass,
3631 AssocExprs[ResultIndex]->getType(),
3632 AssocExprs[ResultIndex]->getValueKind(),
3633 AssocExprs[ResultIndex]->getObjectKind(),
3634 AssocExprs[ResultIndex]->isTypeDependent(),
3635 AssocExprs[ResultIndex]->isValueDependent(),
3636 AssocExprs[ResultIndex]->isInstantiationDependent(),
3637 ContainsUnexpandedParameterPack),
3638 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3639 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3640 NumAssocs(AssocExprs.size()), ResultIndex(ResultIndex),
3641 GenericLoc(GenericLoc), DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3642 SubExprs[CONTROLLING] = ControllingExpr;
3643 assert(AssocTypes.size() == AssocExprs.size());
3644 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3645 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3648 GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
3649 SourceLocation GenericLoc, Expr *ControllingExpr,
3650 ArrayRef<TypeSourceInfo*> AssocTypes,
3651 ArrayRef<Expr*> AssocExprs,
3652 SourceLocation DefaultLoc,
3653 SourceLocation RParenLoc,
3654 bool ContainsUnexpandedParameterPack)
3655 : Expr(GenericSelectionExprClass,
3656 Context.DependentTy,
3659 /*isTypeDependent=*/true,
3660 /*isValueDependent=*/true,
3661 /*isInstantiationDependent=*/true,
3662 ContainsUnexpandedParameterPack),
3663 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3664 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3665 NumAssocs(AssocExprs.size()), ResultIndex(-1U), GenericLoc(GenericLoc),
3666 DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3667 SubExprs[CONTROLLING] = ControllingExpr;
3668 assert(AssocTypes.size() == AssocExprs.size());
3669 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3670 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3673 //===----------------------------------------------------------------------===//
3674 // DesignatedInitExpr
3675 //===----------------------------------------------------------------------===//
3677 IdentifierInfo *DesignatedInitExpr::Designator::getFieldName() const {
3678 assert(Kind == FieldDesignator && "Only valid on a field designator");
3679 if (Field.NameOrField & 0x01)
3680 return reinterpret_cast<IdentifierInfo *>(Field.NameOrField&~0x01);
3682 return getField()->getIdentifier();
3685 DesignatedInitExpr::DesignatedInitExpr(const ASTContext &C, QualType Ty,
3686 unsigned NumDesignators,
3687 const Designator *Designators,
3688 SourceLocation EqualOrColonLoc,
3690 ArrayRef<Expr*> IndexExprs,
3692 : Expr(DesignatedInitExprClass, Ty,
3693 Init->getValueKind(), Init->getObjectKind(),
3694 Init->isTypeDependent(), Init->isValueDependent(),
3695 Init->isInstantiationDependent(),
3696 Init->containsUnexpandedParameterPack()),
3697 EqualOrColonLoc(EqualOrColonLoc), GNUSyntax(GNUSyntax),
3698 NumDesignators(NumDesignators), NumSubExprs(IndexExprs.size() + 1) {
3699 this->Designators = new (C) Designator[NumDesignators];
3701 // Record the initializer itself.
3702 child_range Child = children();
3705 // Copy the designators and their subexpressions, computing
3706 // value-dependence along the way.
3707 unsigned IndexIdx = 0;
3708 for (unsigned I = 0; I != NumDesignators; ++I) {
3709 this->Designators[I] = Designators[I];
3711 if (this->Designators[I].isArrayDesignator()) {
3712 // Compute type- and value-dependence.
3713 Expr *Index = IndexExprs[IndexIdx];
3714 if (Index->isTypeDependent() || Index->isValueDependent())
3715 ExprBits.ValueDependent = true;
3716 if (Index->isInstantiationDependent())
3717 ExprBits.InstantiationDependent = true;
3718 // Propagate unexpanded parameter packs.
3719 if (Index->containsUnexpandedParameterPack())
3720 ExprBits.ContainsUnexpandedParameterPack = true;
3722 // Copy the index expressions into permanent storage.
3723 *Child++ = IndexExprs[IndexIdx++];
3724 } else if (this->Designators[I].isArrayRangeDesignator()) {
3725 // Compute type- and value-dependence.
3726 Expr *Start = IndexExprs[IndexIdx];
3727 Expr *End = IndexExprs[IndexIdx + 1];
3728 if (Start->isTypeDependent() || Start->isValueDependent() ||
3729 End->isTypeDependent() || End->isValueDependent()) {
3730 ExprBits.ValueDependent = true;
3731 ExprBits.InstantiationDependent = true;
3732 } else if (Start->isInstantiationDependent() ||
3733 End->isInstantiationDependent()) {
3734 ExprBits.InstantiationDependent = true;
3737 // Propagate unexpanded parameter packs.
3738 if (Start->containsUnexpandedParameterPack() ||
3739 End->containsUnexpandedParameterPack())
3740 ExprBits.ContainsUnexpandedParameterPack = true;
3742 // Copy the start/end expressions into permanent storage.
3743 *Child++ = IndexExprs[IndexIdx++];
3744 *Child++ = IndexExprs[IndexIdx++];
3748 assert(IndexIdx == IndexExprs.size() && "Wrong number of index expressions");
3751 DesignatedInitExpr *
3752 DesignatedInitExpr::Create(const ASTContext &C, Designator *Designators,
3753 unsigned NumDesignators,
3754 ArrayRef<Expr*> IndexExprs,
3755 SourceLocation ColonOrEqualLoc,
3756 bool UsesColonSyntax, Expr *Init) {
3757 void *Mem = C.Allocate(sizeof(DesignatedInitExpr) +
3758 sizeof(Stmt *) * (IndexExprs.size() + 1), 8);
3759 return new (Mem) DesignatedInitExpr(C, C.VoidTy, NumDesignators, Designators,
3760 ColonOrEqualLoc, UsesColonSyntax,
3764 DesignatedInitExpr *DesignatedInitExpr::CreateEmpty(const ASTContext &C,
3765 unsigned NumIndexExprs) {
3766 void *Mem = C.Allocate(sizeof(DesignatedInitExpr) +
3767 sizeof(Stmt *) * (NumIndexExprs + 1), 8);
3768 return new (Mem) DesignatedInitExpr(NumIndexExprs + 1);
3771 void DesignatedInitExpr::setDesignators(const ASTContext &C,
3772 const Designator *Desigs,
3773 unsigned NumDesigs) {
3774 Designators = new (C) Designator[NumDesigs];
3775 NumDesignators = NumDesigs;
3776 for (unsigned I = 0; I != NumDesigs; ++I)
3777 Designators[I] = Desigs[I];
3780 SourceRange DesignatedInitExpr::getDesignatorsSourceRange() const {
3781 DesignatedInitExpr *DIE = const_cast<DesignatedInitExpr*>(this);
3783 return DIE->getDesignator(0)->getSourceRange();
3784 return SourceRange(DIE->getDesignator(0)->getLocStart(),
3785 DIE->getDesignator(size()-1)->getLocEnd());
3788 SourceLocation DesignatedInitExpr::getLocStart() const {
3789 SourceLocation StartLoc;
3791 *const_cast<DesignatedInitExpr*>(this)->designators_begin();
3792 if (First.isFieldDesignator()) {
3794 StartLoc = SourceLocation::getFromRawEncoding(First.Field.FieldLoc);
3796 StartLoc = SourceLocation::getFromRawEncoding(First.Field.DotLoc);
3799 SourceLocation::getFromRawEncoding(First.ArrayOrRange.LBracketLoc);
3803 SourceLocation DesignatedInitExpr::getLocEnd() const {
3804 return getInit()->getLocEnd();
3807 Expr *DesignatedInitExpr::getArrayIndex(const Designator& D) const {
3808 assert(D.Kind == Designator::ArrayDesignator && "Requires array designator");
3809 char *Ptr = static_cast<char *>(
3810 const_cast<void *>(static_cast<const void *>(this)));
3811 Ptr += sizeof(DesignatedInitExpr);
3812 Stmt **SubExprs = reinterpret_cast<Stmt**>(reinterpret_cast<void**>(Ptr));
3813 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 1));
3816 Expr *DesignatedInitExpr::getArrayRangeStart(const Designator &D) const {
3817 assert(D.Kind == Designator::ArrayRangeDesignator &&
3818 "Requires array range designator");
3819 char *Ptr = static_cast<char *>(
3820 const_cast<void *>(static_cast<const void *>(this)));
3821 Ptr += sizeof(DesignatedInitExpr);
3822 Stmt **SubExprs = reinterpret_cast<Stmt**>(reinterpret_cast<void**>(Ptr));
3823 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 1));
3826 Expr *DesignatedInitExpr::getArrayRangeEnd(const Designator &D) const {
3827 assert(D.Kind == Designator::ArrayRangeDesignator &&
3828 "Requires array range designator");
3829 char *Ptr = static_cast<char *>(
3830 const_cast<void *>(static_cast<const void *>(this)));
3831 Ptr += sizeof(DesignatedInitExpr);
3832 Stmt **SubExprs = reinterpret_cast<Stmt**>(reinterpret_cast<void**>(Ptr));
3833 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 2));
3836 /// \brief Replaces the designator at index @p Idx with the series
3837 /// of designators in [First, Last).
3838 void DesignatedInitExpr::ExpandDesignator(const ASTContext &C, unsigned Idx,
3839 const Designator *First,
3840 const Designator *Last) {
3841 unsigned NumNewDesignators = Last - First;
3842 if (NumNewDesignators == 0) {
3843 std::copy_backward(Designators + Idx + 1,
3844 Designators + NumDesignators,
3846 --NumNewDesignators;
3848 } else if (NumNewDesignators == 1) {
3849 Designators[Idx] = *First;
3853 Designator *NewDesignators
3854 = new (C) Designator[NumDesignators - 1 + NumNewDesignators];
3855 std::copy(Designators, Designators + Idx, NewDesignators);
3856 std::copy(First, Last, NewDesignators + Idx);
3857 std::copy(Designators + Idx + 1, Designators + NumDesignators,
3858 NewDesignators + Idx + NumNewDesignators);
3859 Designators = NewDesignators;
3860 NumDesignators = NumDesignators - 1 + NumNewDesignators;
3863 ParenListExpr::ParenListExpr(const ASTContext& C, SourceLocation lparenloc,
3864 ArrayRef<Expr*> exprs,
3865 SourceLocation rparenloc)
3866 : Expr(ParenListExprClass, QualType(), VK_RValue, OK_Ordinary,
3867 false, false, false, false),
3868 NumExprs(exprs.size()), LParenLoc(lparenloc), RParenLoc(rparenloc) {
3869 Exprs = new (C) Stmt*[exprs.size()];
3870 for (unsigned i = 0; i != exprs.size(); ++i) {
3871 if (exprs[i]->isTypeDependent())
3872 ExprBits.TypeDependent = true;
3873 if (exprs[i]->isValueDependent())
3874 ExprBits.ValueDependent = true;
3875 if (exprs[i]->isInstantiationDependent())
3876 ExprBits.InstantiationDependent = true;
3877 if (exprs[i]->containsUnexpandedParameterPack())
3878 ExprBits.ContainsUnexpandedParameterPack = true;
3880 Exprs[i] = exprs[i];
3884 const OpaqueValueExpr *OpaqueValueExpr::findInCopyConstruct(const Expr *e) {
3885 if (const ExprWithCleanups *ewc = dyn_cast<ExprWithCleanups>(e))
3886 e = ewc->getSubExpr();
3887 if (const MaterializeTemporaryExpr *m = dyn_cast<MaterializeTemporaryExpr>(e))
3888 e = m->GetTemporaryExpr();
3889 e = cast<CXXConstructExpr>(e)->getArg(0);
3890 while (const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(e))
3891 e = ice->getSubExpr();
3892 return cast<OpaqueValueExpr>(e);
3895 PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &Context,
3897 unsigned numSemanticExprs) {
3898 void *buffer = Context.Allocate(sizeof(PseudoObjectExpr) +
3899 (1 + numSemanticExprs) * sizeof(Expr*),
3900 llvm::alignOf<PseudoObjectExpr>());
3901 return new(buffer) PseudoObjectExpr(sh, numSemanticExprs);
3904 PseudoObjectExpr::PseudoObjectExpr(EmptyShell shell, unsigned numSemanticExprs)
3905 : Expr(PseudoObjectExprClass, shell) {
3906 PseudoObjectExprBits.NumSubExprs = numSemanticExprs + 1;
3909 PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &C, Expr *syntax,
3910 ArrayRef<Expr*> semantics,
3911 unsigned resultIndex) {
3912 assert(syntax && "no syntactic expression!");
3913 assert(semantics.size() && "no semantic expressions!");
3917 if (resultIndex == NoResult) {
3921 assert(resultIndex < semantics.size());
3922 type = semantics[resultIndex]->getType();
3923 VK = semantics[resultIndex]->getValueKind();
3924 assert(semantics[resultIndex]->getObjectKind() == OK_Ordinary);
3927 void *buffer = C.Allocate(sizeof(PseudoObjectExpr) +
3928 (1 + semantics.size()) * sizeof(Expr*),
3929 llvm::alignOf<PseudoObjectExpr>());
3930 return new(buffer) PseudoObjectExpr(type, VK, syntax, semantics,
3934 PseudoObjectExpr::PseudoObjectExpr(QualType type, ExprValueKind VK,
3935 Expr *syntax, ArrayRef<Expr*> semantics,
3936 unsigned resultIndex)
3937 : Expr(PseudoObjectExprClass, type, VK, OK_Ordinary,
3938 /*filled in at end of ctor*/ false, false, false, false) {
3939 PseudoObjectExprBits.NumSubExprs = semantics.size() + 1;
3940 PseudoObjectExprBits.ResultIndex = resultIndex + 1;
3942 for (unsigned i = 0, e = semantics.size() + 1; i != e; ++i) {
3943 Expr *E = (i == 0 ? syntax : semantics[i-1]);
3944 getSubExprsBuffer()[i] = E;
3946 if (E->isTypeDependent())
3947 ExprBits.TypeDependent = true;
3948 if (E->isValueDependent())
3949 ExprBits.ValueDependent = true;
3950 if (E->isInstantiationDependent())
3951 ExprBits.InstantiationDependent = true;
3952 if (E->containsUnexpandedParameterPack())
3953 ExprBits.ContainsUnexpandedParameterPack = true;
3955 if (isa<OpaqueValueExpr>(E))
3956 assert(cast<OpaqueValueExpr>(E)->getSourceExpr() != 0 &&
3957 "opaque-value semantic expressions for pseudo-object "
3958 "operations must have sources");
3962 //===----------------------------------------------------------------------===//
3964 //===----------------------------------------------------------------------===//
3966 Expr* ExprIterator::operator[](size_t idx) { return cast<Expr>(I[idx]); }
3967 Expr* ExprIterator::operator*() const { return cast<Expr>(*I); }
3968 Expr* ExprIterator::operator->() const { return cast<Expr>(*I); }
3969 const Expr* ConstExprIterator::operator[](size_t idx) const {
3970 return cast<Expr>(I[idx]);
3972 const Expr* ConstExprIterator::operator*() const { return cast<Expr>(*I); }
3973 const Expr* ConstExprIterator::operator->() const { return cast<Expr>(*I); }
3975 //===----------------------------------------------------------------------===//
3976 // Child Iterators for iterating over subexpressions/substatements
3977 //===----------------------------------------------------------------------===//
3979 // UnaryExprOrTypeTraitExpr
3980 Stmt::child_range UnaryExprOrTypeTraitExpr::children() {
3981 // If this is of a type and the type is a VLA type (and not a typedef), the
3982 // size expression of the VLA needs to be treated as an executable expression.
3983 // Why isn't this weirdness documented better in StmtIterator?
3984 if (isArgumentType()) {
3985 if (const VariableArrayType* T = dyn_cast<VariableArrayType>(
3986 getArgumentType().getTypePtr()))
3987 return child_range(child_iterator(T), child_iterator());
3988 return child_range();
3990 return child_range(&Argument.Ex, &Argument.Ex + 1);
3994 Stmt::child_range ObjCMessageExpr::children() {
3996 if (getReceiverKind() == Instance)
3997 begin = reinterpret_cast<Stmt **>(this + 1);
3999 begin = reinterpret_cast<Stmt **>(getArgs());
4000 return child_range(begin,
4001 reinterpret_cast<Stmt **>(getArgs() + getNumArgs()));
4004 ObjCArrayLiteral::ObjCArrayLiteral(ArrayRef<Expr *> Elements,
4005 QualType T, ObjCMethodDecl *Method,
4007 : Expr(ObjCArrayLiteralClass, T, VK_RValue, OK_Ordinary,
4008 false, false, false, false),
4009 NumElements(Elements.size()), Range(SR), ArrayWithObjectsMethod(Method)
4011 Expr **SaveElements = getElements();
4012 for (unsigned I = 0, N = Elements.size(); I != N; ++I) {
4013 if (Elements[I]->isTypeDependent() || Elements[I]->isValueDependent())
4014 ExprBits.ValueDependent = true;
4015 if (Elements[I]->isInstantiationDependent())
4016 ExprBits.InstantiationDependent = true;
4017 if (Elements[I]->containsUnexpandedParameterPack())
4018 ExprBits.ContainsUnexpandedParameterPack = true;
4020 SaveElements[I] = Elements[I];
4024 ObjCArrayLiteral *ObjCArrayLiteral::Create(const ASTContext &C,
4025 ArrayRef<Expr *> Elements,
4026 QualType T, ObjCMethodDecl * Method,
4028 void *Mem = C.Allocate(sizeof(ObjCArrayLiteral)
4029 + Elements.size() * sizeof(Expr *));
4030 return new (Mem) ObjCArrayLiteral(Elements, T, Method, SR);
4033 ObjCArrayLiteral *ObjCArrayLiteral::CreateEmpty(const ASTContext &C,
4034 unsigned NumElements) {
4036 void *Mem = C.Allocate(sizeof(ObjCArrayLiteral)
4037 + NumElements * sizeof(Expr *));
4038 return new (Mem) ObjCArrayLiteral(EmptyShell(), NumElements);
4041 ObjCDictionaryLiteral::ObjCDictionaryLiteral(
4042 ArrayRef<ObjCDictionaryElement> VK,
4043 bool HasPackExpansions,
4044 QualType T, ObjCMethodDecl *method,
4046 : Expr(ObjCDictionaryLiteralClass, T, VK_RValue, OK_Ordinary, false, false,
4048 NumElements(VK.size()), HasPackExpansions(HasPackExpansions), Range(SR),
4049 DictWithObjectsMethod(method)
4051 KeyValuePair *KeyValues = getKeyValues();
4052 ExpansionData *Expansions = getExpansionData();
4053 for (unsigned I = 0; I < NumElements; I++) {
4054 if (VK[I].Key->isTypeDependent() || VK[I].Key->isValueDependent() ||
4055 VK[I].Value->isTypeDependent() || VK[I].Value->isValueDependent())
4056 ExprBits.ValueDependent = true;
4057 if (VK[I].Key->isInstantiationDependent() ||
4058 VK[I].Value->isInstantiationDependent())
4059 ExprBits.InstantiationDependent = true;
4060 if (VK[I].EllipsisLoc.isInvalid() &&
4061 (VK[I].Key->containsUnexpandedParameterPack() ||
4062 VK[I].Value->containsUnexpandedParameterPack()))
4063 ExprBits.ContainsUnexpandedParameterPack = true;
4065 KeyValues[I].Key = VK[I].Key;
4066 KeyValues[I].Value = VK[I].Value;
4068 Expansions[I].EllipsisLoc = VK[I].EllipsisLoc;
4069 if (VK[I].NumExpansions)
4070 Expansions[I].NumExpansionsPlusOne = *VK[I].NumExpansions + 1;
4072 Expansions[I].NumExpansionsPlusOne = 0;
4077 ObjCDictionaryLiteral *
4078 ObjCDictionaryLiteral::Create(const ASTContext &C,
4079 ArrayRef<ObjCDictionaryElement> VK,
4080 bool HasPackExpansions,
4081 QualType T, ObjCMethodDecl *method,
4083 unsigned ExpansionsSize = 0;
4084 if (HasPackExpansions)
4085 ExpansionsSize = sizeof(ExpansionData) * VK.size();
4087 void *Mem = C.Allocate(sizeof(ObjCDictionaryLiteral) +
4088 sizeof(KeyValuePair) * VK.size() + ExpansionsSize);
4089 return new (Mem) ObjCDictionaryLiteral(VK, HasPackExpansions, T, method, SR);
4092 ObjCDictionaryLiteral *
4093 ObjCDictionaryLiteral::CreateEmpty(const ASTContext &C, unsigned NumElements,
4094 bool HasPackExpansions) {
4095 unsigned ExpansionsSize = 0;
4096 if (HasPackExpansions)
4097 ExpansionsSize = sizeof(ExpansionData) * NumElements;
4098 void *Mem = C.Allocate(sizeof(ObjCDictionaryLiteral) +
4099 sizeof(KeyValuePair) * NumElements + ExpansionsSize);
4100 return new (Mem) ObjCDictionaryLiteral(EmptyShell(), NumElements,
4104 ObjCSubscriptRefExpr *ObjCSubscriptRefExpr::Create(const ASTContext &C,
4106 Expr *key, QualType T,
4107 ObjCMethodDecl *getMethod,
4108 ObjCMethodDecl *setMethod,
4109 SourceLocation RB) {
4110 void *Mem = C.Allocate(sizeof(ObjCSubscriptRefExpr));
4111 return new (Mem) ObjCSubscriptRefExpr(base, key, T, VK_LValue,
4113 getMethod, setMethod, RB);
4116 AtomicExpr::AtomicExpr(SourceLocation BLoc, ArrayRef<Expr*> args,
4117 QualType t, AtomicOp op, SourceLocation RP)
4118 : Expr(AtomicExprClass, t, VK_RValue, OK_Ordinary,
4119 false, false, false, false),
4120 NumSubExprs(args.size()), BuiltinLoc(BLoc), RParenLoc(RP), Op(op)
4122 assert(args.size() == getNumSubExprs(op) && "wrong number of subexpressions");
4123 for (unsigned i = 0; i != args.size(); i++) {
4124 if (args[i]->isTypeDependent())
4125 ExprBits.TypeDependent = true;
4126 if (args[i]->isValueDependent())
4127 ExprBits.ValueDependent = true;
4128 if (args[i]->isInstantiationDependent())
4129 ExprBits.InstantiationDependent = true;
4130 if (args[i]->containsUnexpandedParameterPack())
4131 ExprBits.ContainsUnexpandedParameterPack = true;
4133 SubExprs[i] = args[i];
4137 unsigned AtomicExpr::getNumSubExprs(AtomicOp Op) {
4139 case AO__c11_atomic_init:
4140 case AO__c11_atomic_load:
4141 case AO__atomic_load_n:
4144 case AO__c11_atomic_store:
4145 case AO__c11_atomic_exchange:
4146 case AO__atomic_load:
4147 case AO__atomic_store:
4148 case AO__atomic_store_n:
4149 case AO__atomic_exchange_n:
4150 case AO__c11_atomic_fetch_add:
4151 case AO__c11_atomic_fetch_sub:
4152 case AO__c11_atomic_fetch_and:
4153 case AO__c11_atomic_fetch_or:
4154 case AO__c11_atomic_fetch_xor:
4155 case AO__atomic_fetch_add:
4156 case AO__atomic_fetch_sub:
4157 case AO__atomic_fetch_and:
4158 case AO__atomic_fetch_or:
4159 case AO__atomic_fetch_xor:
4160 case AO__atomic_fetch_nand:
4161 case AO__atomic_add_fetch:
4162 case AO__atomic_sub_fetch:
4163 case AO__atomic_and_fetch:
4164 case AO__atomic_or_fetch:
4165 case AO__atomic_xor_fetch:
4166 case AO__atomic_nand_fetch:
4169 case AO__atomic_exchange:
4172 case AO__c11_atomic_compare_exchange_strong:
4173 case AO__c11_atomic_compare_exchange_weak:
4176 case AO__atomic_compare_exchange:
4177 case AO__atomic_compare_exchange_n:
4180 llvm_unreachable("unknown atomic op");