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/Expr.h"
15 #include "clang/AST/ExprCXX.h"
16 #include "clang/AST/APValue.h"
17 #include "clang/AST/ASTContext.h"
18 #include "clang/AST/DeclObjC.h"
19 #include "clang/AST/DeclCXX.h"
20 #include "clang/AST/DeclTemplate.h"
21 #include "clang/AST/EvaluatedExprVisitor.h"
22 #include "clang/AST/RecordLayout.h"
23 #include "clang/AST/StmtVisitor.h"
24 #include "clang/Lex/LiteralSupport.h"
25 #include "clang/Lex/Lexer.h"
26 #include "clang/Sema/SemaDiagnostic.h"
27 #include "clang/Basic/Builtins.h"
28 #include "clang/Basic/SourceManager.h"
29 #include "clang/Basic/TargetInfo.h"
30 #include "llvm/Support/ErrorHandling.h"
31 #include "llvm/Support/raw_ostream.h"
34 using namespace clang;
36 const CXXRecordDecl *Expr::getBestDynamicClassType() const {
37 const Expr *E = ignoreParenBaseCasts();
39 QualType DerivedType = E->getType();
40 if (const PointerType *PTy = DerivedType->getAs<PointerType>())
41 DerivedType = PTy->getPointeeType();
43 if (DerivedType->isDependentType())
46 const RecordType *Ty = DerivedType->castAs<RecordType>();
47 Decl *D = Ty->getDecl();
48 return cast<CXXRecordDecl>(D);
52 Expr::skipRValueSubobjectAdjustments(
53 SmallVectorImpl<SubobjectAdjustment> &Adjustments) const {
56 E = E->IgnoreParens();
58 if (const CastExpr *CE = dyn_cast<CastExpr>(E)) {
59 if ((CE->getCastKind() == CK_DerivedToBase ||
60 CE->getCastKind() == CK_UncheckedDerivedToBase) &&
61 E->getType()->isRecordType()) {
63 CXXRecordDecl *Derived
64 = cast<CXXRecordDecl>(E->getType()->getAs<RecordType>()->getDecl());
65 Adjustments.push_back(SubobjectAdjustment(CE, Derived));
69 if (CE->getCastKind() == CK_NoOp) {
73 } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) {
74 if (!ME->isArrow() && ME->getBase()->isRValue()) {
75 assert(ME->getBase()->getType()->isRecordType());
76 if (FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl())) {
78 Adjustments.push_back(SubobjectAdjustment(Field));
82 } else if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
83 if (BO->isPtrMemOp()) {
84 assert(BO->getRHS()->isRValue());
86 const MemberPointerType *MPT =
87 BO->getRHS()->getType()->getAs<MemberPointerType>();
88 Adjustments.push_back(SubobjectAdjustment(MPT, BO->getRHS()));
99 Expr::findMaterializedTemporary(const MaterializeTemporaryExpr *&MTE) const {
100 const Expr *E = this;
101 // Look through single-element init lists that claim to be lvalues. They're
102 // just syntactic wrappers in this case.
103 if (const InitListExpr *ILE = dyn_cast<InitListExpr>(E)) {
104 if (ILE->getNumInits() == 1 && ILE->isGLValue())
108 // Look through expressions for materialized temporaries (for now).
109 if (const MaterializeTemporaryExpr *M
110 = dyn_cast<MaterializeTemporaryExpr>(E)) {
112 E = M->GetTemporaryExpr();
115 if (const CXXDefaultArgExpr *DAE = dyn_cast<CXXDefaultArgExpr>(E))
120 /// isKnownToHaveBooleanValue - Return true if this is an integer expression
121 /// that is known to return 0 or 1. This happens for _Bool/bool expressions
122 /// but also int expressions which are produced by things like comparisons in
124 bool Expr::isKnownToHaveBooleanValue() const {
125 const Expr *E = IgnoreParens();
127 // If this value has _Bool type, it is obvious 0/1.
128 if (E->getType()->isBooleanType()) return true;
129 // If this is a non-scalar-integer type, we don't care enough to try.
130 if (!E->getType()->isIntegralOrEnumerationType()) return false;
132 if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
133 switch (UO->getOpcode()) {
135 return UO->getSubExpr()->isKnownToHaveBooleanValue();
141 // Only look through implicit casts. If the user writes
142 // '(int) (a && b)' treat it as an arbitrary int.
143 if (const ImplicitCastExpr *CE = dyn_cast<ImplicitCastExpr>(E))
144 return CE->getSubExpr()->isKnownToHaveBooleanValue();
146 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
147 switch (BO->getOpcode()) {
148 default: return false;
149 case BO_LT: // Relational operators.
153 case BO_EQ: // Equality operators.
155 case BO_LAnd: // AND operator.
156 case BO_LOr: // Logical OR operator.
159 case BO_And: // Bitwise AND operator.
160 case BO_Xor: // Bitwise XOR operator.
161 case BO_Or: // Bitwise OR operator.
162 // Handle things like (x==2)|(y==12).
163 return BO->getLHS()->isKnownToHaveBooleanValue() &&
164 BO->getRHS()->isKnownToHaveBooleanValue();
168 return BO->getRHS()->isKnownToHaveBooleanValue();
172 if (const ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E))
173 return CO->getTrueExpr()->isKnownToHaveBooleanValue() &&
174 CO->getFalseExpr()->isKnownToHaveBooleanValue();
179 // Amusing macro metaprogramming hack: check whether a class provides
180 // a more specific implementation of getExprLoc().
182 // See also Stmt.cpp:{getLocStart(),getLocEnd()}.
184 /// This implementation is used when a class provides a custom
185 /// implementation of getExprLoc.
186 template <class E, class T>
187 SourceLocation getExprLocImpl(const Expr *expr,
188 SourceLocation (T::*v)() const) {
189 return static_cast<const E*>(expr)->getExprLoc();
192 /// This implementation is used when a class doesn't provide
193 /// a custom implementation of getExprLoc. Overload resolution
194 /// should pick it over the implementation above because it's
195 /// more specialized according to function template partial ordering.
197 SourceLocation getExprLocImpl(const Expr *expr,
198 SourceLocation (Expr::*v)() const) {
199 return static_cast<const E*>(expr)->getLocStart();
203 SourceLocation Expr::getExprLoc() const {
204 switch (getStmtClass()) {
205 case Stmt::NoStmtClass: llvm_unreachable("statement without class");
206 #define ABSTRACT_STMT(type)
207 #define STMT(type, base) \
208 case Stmt::type##Class: llvm_unreachable(#type " is not an Expr"); break;
209 #define EXPR(type, base) \
210 case Stmt::type##Class: return getExprLocImpl<type>(this, &type::getExprLoc);
211 #include "clang/AST/StmtNodes.inc"
213 llvm_unreachable("unknown statement kind");
216 //===----------------------------------------------------------------------===//
217 // Primary Expressions.
218 //===----------------------------------------------------------------------===//
220 /// \brief Compute the type-, value-, and instantiation-dependence of a
221 /// declaration reference
222 /// based on the declaration being referenced.
223 static void computeDeclRefDependence(ASTContext &Ctx, NamedDecl *D, QualType T,
225 bool &ValueDependent,
226 bool &InstantiationDependent) {
227 TypeDependent = false;
228 ValueDependent = false;
229 InstantiationDependent = false;
231 // (TD) C++ [temp.dep.expr]p3:
232 // An id-expression is type-dependent if it contains:
236 // (VD) C++ [temp.dep.constexpr]p2:
237 // An identifier is value-dependent if it is:
239 // (TD) - an identifier that was declared with dependent type
240 // (VD) - a name declared with a dependent type,
241 if (T->isDependentType()) {
242 TypeDependent = true;
243 ValueDependent = true;
244 InstantiationDependent = true;
246 } else if (T->isInstantiationDependentType()) {
247 InstantiationDependent = true;
250 // (TD) - a conversion-function-id that specifies a dependent type
251 if (D->getDeclName().getNameKind()
252 == DeclarationName::CXXConversionFunctionName) {
253 QualType T = D->getDeclName().getCXXNameType();
254 if (T->isDependentType()) {
255 TypeDependent = true;
256 ValueDependent = true;
257 InstantiationDependent = true;
261 if (T->isInstantiationDependentType())
262 InstantiationDependent = true;
265 // (VD) - the name of a non-type template parameter,
266 if (isa<NonTypeTemplateParmDecl>(D)) {
267 ValueDependent = true;
268 InstantiationDependent = true;
272 // (VD) - a constant with integral or enumeration type and is
273 // initialized with an expression that is value-dependent.
274 // (VD) - a constant with literal type and is initialized with an
275 // expression that is value-dependent [C++11].
276 // (VD) - FIXME: Missing from the standard:
277 // - an entity with reference type and is initialized with an
278 // expression that is value-dependent [C++11]
279 if (VarDecl *Var = dyn_cast<VarDecl>(D)) {
280 if ((Ctx.getLangOpts().CPlusPlus0x ?
281 Var->getType()->isLiteralType() :
282 Var->getType()->isIntegralOrEnumerationType()) &&
283 (Var->getType().isConstQualified() ||
284 Var->getType()->isReferenceType())) {
285 if (const Expr *Init = Var->getAnyInitializer())
286 if (Init->isValueDependent()) {
287 ValueDependent = true;
288 InstantiationDependent = true;
292 // (VD) - FIXME: Missing from the standard:
293 // - a member function or a static data member of the current
295 if (Var->isStaticDataMember() &&
296 Var->getDeclContext()->isDependentContext()) {
297 ValueDependent = true;
298 InstantiationDependent = true;
304 // (VD) - FIXME: Missing from the standard:
305 // - a member function or a static data member of the current
307 if (isa<CXXMethodDecl>(D) && D->getDeclContext()->isDependentContext()) {
308 ValueDependent = true;
309 InstantiationDependent = true;
313 void DeclRefExpr::computeDependence(ASTContext &Ctx) {
314 bool TypeDependent = false;
315 bool ValueDependent = false;
316 bool InstantiationDependent = false;
317 computeDeclRefDependence(Ctx, getDecl(), getType(), TypeDependent,
318 ValueDependent, InstantiationDependent);
320 // (TD) C++ [temp.dep.expr]p3:
321 // An id-expression is type-dependent if it contains:
325 // (VD) C++ [temp.dep.constexpr]p2:
326 // An identifier is value-dependent if it is:
327 if (!TypeDependent && !ValueDependent &&
328 hasExplicitTemplateArgs() &&
329 TemplateSpecializationType::anyDependentTemplateArguments(
331 getNumTemplateArgs(),
332 InstantiationDependent)) {
333 TypeDependent = true;
334 ValueDependent = true;
335 InstantiationDependent = true;
338 ExprBits.TypeDependent = TypeDependent;
339 ExprBits.ValueDependent = ValueDependent;
340 ExprBits.InstantiationDependent = InstantiationDependent;
342 // Is the declaration a parameter pack?
343 if (getDecl()->isParameterPack())
344 ExprBits.ContainsUnexpandedParameterPack = true;
347 DeclRefExpr::DeclRefExpr(ASTContext &Ctx,
348 NestedNameSpecifierLoc QualifierLoc,
349 SourceLocation TemplateKWLoc,
350 ValueDecl *D, bool RefersToEnclosingLocal,
351 const DeclarationNameInfo &NameInfo,
353 const TemplateArgumentListInfo *TemplateArgs,
354 QualType T, ExprValueKind VK)
355 : Expr(DeclRefExprClass, T, VK, OK_Ordinary, false, false, false, false),
356 D(D), Loc(NameInfo.getLoc()), DNLoc(NameInfo.getInfo()) {
357 DeclRefExprBits.HasQualifier = QualifierLoc ? 1 : 0;
359 getInternalQualifierLoc() = QualifierLoc;
360 DeclRefExprBits.HasFoundDecl = FoundD ? 1 : 0;
362 getInternalFoundDecl() = FoundD;
363 DeclRefExprBits.HasTemplateKWAndArgsInfo
364 = (TemplateArgs || TemplateKWLoc.isValid()) ? 1 : 0;
365 DeclRefExprBits.RefersToEnclosingLocal = RefersToEnclosingLocal;
367 bool Dependent = false;
368 bool InstantiationDependent = false;
369 bool ContainsUnexpandedParameterPack = false;
370 getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc, *TemplateArgs,
372 InstantiationDependent,
373 ContainsUnexpandedParameterPack);
374 if (InstantiationDependent)
375 setInstantiationDependent(true);
376 } else if (TemplateKWLoc.isValid()) {
377 getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc);
379 DeclRefExprBits.HadMultipleCandidates = 0;
381 computeDependence(Ctx);
384 DeclRefExpr *DeclRefExpr::Create(ASTContext &Context,
385 NestedNameSpecifierLoc QualifierLoc,
386 SourceLocation TemplateKWLoc,
388 bool RefersToEnclosingLocal,
389 SourceLocation NameLoc,
393 const TemplateArgumentListInfo *TemplateArgs) {
394 return Create(Context, QualifierLoc, TemplateKWLoc, D,
395 RefersToEnclosingLocal,
396 DeclarationNameInfo(D->getDeclName(), NameLoc),
397 T, VK, FoundD, TemplateArgs);
400 DeclRefExpr *DeclRefExpr::Create(ASTContext &Context,
401 NestedNameSpecifierLoc QualifierLoc,
402 SourceLocation TemplateKWLoc,
404 bool RefersToEnclosingLocal,
405 const DeclarationNameInfo &NameInfo,
409 const TemplateArgumentListInfo *TemplateArgs) {
410 // Filter out cases where the found Decl is the same as the value refenenced.
414 std::size_t Size = sizeof(DeclRefExpr);
415 if (QualifierLoc != 0)
416 Size += sizeof(NestedNameSpecifierLoc);
418 Size += sizeof(NamedDecl *);
420 Size += ASTTemplateKWAndArgsInfo::sizeFor(TemplateArgs->size());
421 else if (TemplateKWLoc.isValid())
422 Size += ASTTemplateKWAndArgsInfo::sizeFor(0);
424 void *Mem = Context.Allocate(Size, llvm::alignOf<DeclRefExpr>());
425 return new (Mem) DeclRefExpr(Context, QualifierLoc, TemplateKWLoc, D,
426 RefersToEnclosingLocal,
427 NameInfo, FoundD, TemplateArgs, T, VK);
430 DeclRefExpr *DeclRefExpr::CreateEmpty(ASTContext &Context,
433 bool HasTemplateKWAndArgsInfo,
434 unsigned NumTemplateArgs) {
435 std::size_t Size = sizeof(DeclRefExpr);
437 Size += sizeof(NestedNameSpecifierLoc);
439 Size += sizeof(NamedDecl *);
440 if (HasTemplateKWAndArgsInfo)
441 Size += ASTTemplateKWAndArgsInfo::sizeFor(NumTemplateArgs);
443 void *Mem = Context.Allocate(Size, llvm::alignOf<DeclRefExpr>());
444 return new (Mem) DeclRefExpr(EmptyShell());
447 SourceRange DeclRefExpr::getSourceRange() const {
448 SourceRange R = getNameInfo().getSourceRange();
450 R.setBegin(getQualifierLoc().getBeginLoc());
451 if (hasExplicitTemplateArgs())
452 R.setEnd(getRAngleLoc());
455 SourceLocation DeclRefExpr::getLocStart() const {
457 return getQualifierLoc().getBeginLoc();
458 return getNameInfo().getLocStart();
460 SourceLocation DeclRefExpr::getLocEnd() const {
461 if (hasExplicitTemplateArgs())
462 return getRAngleLoc();
463 return getNameInfo().getLocEnd();
466 // FIXME: Maybe this should use DeclPrinter with a special "print predefined
467 // expr" policy instead.
468 std::string PredefinedExpr::ComputeName(IdentType IT, const Decl *CurrentDecl) {
469 ASTContext &Context = CurrentDecl->getASTContext();
471 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(CurrentDecl)) {
472 if (IT != PrettyFunction && IT != PrettyFunctionNoVirtual)
473 return FD->getNameAsString();
475 SmallString<256> Name;
476 llvm::raw_svector_ostream Out(Name);
478 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
479 if (MD->isVirtual() && IT != PrettyFunctionNoVirtual)
485 PrintingPolicy Policy(Context.getLangOpts());
486 std::string Proto = FD->getQualifiedNameAsString(Policy);
487 llvm::raw_string_ostream POut(Proto);
489 const FunctionDecl *Decl = FD;
490 if (const FunctionDecl* Pattern = FD->getTemplateInstantiationPattern())
492 const FunctionType *AFT = Decl->getType()->getAs<FunctionType>();
493 const FunctionProtoType *FT = 0;
494 if (FD->hasWrittenPrototype())
495 FT = dyn_cast<FunctionProtoType>(AFT);
499 for (unsigned i = 0, e = Decl->getNumParams(); i != e; ++i) {
501 POut << Decl->getParamDecl(i)->getType().stream(Policy);
504 if (FT->isVariadic()) {
505 if (FD->getNumParams()) POut << ", ";
511 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
512 const FunctionType *FT = cast<FunctionType>(MD->getType().getTypePtr());
515 if (FT->isVolatile())
517 RefQualifierKind Ref = MD->getRefQualifier();
518 if (Ref == RQ_LValue)
520 else if (Ref == RQ_RValue)
524 typedef SmallVector<const ClassTemplateSpecializationDecl *, 8> SpecsTy;
526 const DeclContext *Ctx = FD->getDeclContext();
527 while (Ctx && isa<NamedDecl>(Ctx)) {
528 const ClassTemplateSpecializationDecl *Spec
529 = dyn_cast<ClassTemplateSpecializationDecl>(Ctx);
530 if (Spec && !Spec->isExplicitSpecialization())
531 Specs.push_back(Spec);
532 Ctx = Ctx->getParent();
535 std::string TemplateParams;
536 llvm::raw_string_ostream TOut(TemplateParams);
537 for (SpecsTy::reverse_iterator I = Specs.rbegin(), E = Specs.rend();
539 const TemplateParameterList *Params
540 = (*I)->getSpecializedTemplate()->getTemplateParameters();
541 const TemplateArgumentList &Args = (*I)->getTemplateArgs();
542 assert(Params->size() == Args.size());
543 for (unsigned i = 0, numParams = Params->size(); i != numParams; ++i) {
544 StringRef Param = Params->getParam(i)->getName();
545 if (Param.empty()) continue;
546 TOut << Param << " = ";
547 Args.get(i).print(Policy, TOut);
552 FunctionTemplateSpecializationInfo *FSI
553 = FD->getTemplateSpecializationInfo();
554 if (FSI && !FSI->isExplicitSpecialization()) {
555 const TemplateParameterList* Params
556 = FSI->getTemplate()->getTemplateParameters();
557 const TemplateArgumentList* Args = FSI->TemplateArguments;
558 assert(Params->size() == Args->size());
559 for (unsigned i = 0, e = Params->size(); i != e; ++i) {
560 StringRef Param = Params->getParam(i)->getName();
561 if (Param.empty()) continue;
562 TOut << Param << " = ";
563 Args->get(i).print(Policy, TOut);
569 if (!TemplateParams.empty()) {
570 // remove the trailing comma and space
571 TemplateParams.resize(TemplateParams.size() - 2);
572 POut << " [" << TemplateParams << "]";
577 if (!isa<CXXConstructorDecl>(FD) && !isa<CXXDestructorDecl>(FD))
578 AFT->getResultType().getAsStringInternal(Proto, Policy);
583 return Name.str().str();
585 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(CurrentDecl)) {
586 SmallString<256> Name;
587 llvm::raw_svector_ostream Out(Name);
588 Out << (MD->isInstanceMethod() ? '-' : '+');
591 // For incorrect code, there might not be an ObjCInterfaceDecl. Do
592 // a null check to avoid a crash.
593 if (const ObjCInterfaceDecl *ID = MD->getClassInterface())
596 if (const ObjCCategoryImplDecl *CID =
597 dyn_cast<ObjCCategoryImplDecl>(MD->getDeclContext()))
598 Out << '(' << *CID << ')';
601 Out << MD->getSelector().getAsString();
605 return Name.str().str();
607 if (isa<TranslationUnitDecl>(CurrentDecl) && IT == PrettyFunction) {
608 // __PRETTY_FUNCTION__ -> "top level", the others produce an empty string.
614 void APNumericStorage::setIntValue(ASTContext &C, const llvm::APInt &Val) {
618 BitWidth = Val.getBitWidth();
619 unsigned NumWords = Val.getNumWords();
620 const uint64_t* Words = Val.getRawData();
622 pVal = new (C) uint64_t[NumWords];
623 std::copy(Words, Words + NumWords, pVal);
624 } else if (NumWords == 1)
630 IntegerLiteral::IntegerLiteral(ASTContext &C, const llvm::APInt &V,
631 QualType type, SourceLocation l)
632 : Expr(IntegerLiteralClass, type, VK_RValue, OK_Ordinary, false, false,
635 assert(type->isIntegerType() && "Illegal type in IntegerLiteral");
636 assert(V.getBitWidth() == C.getIntWidth(type) &&
637 "Integer type is not the correct size for constant.");
642 IntegerLiteral::Create(ASTContext &C, const llvm::APInt &V,
643 QualType type, SourceLocation l) {
644 return new (C) IntegerLiteral(C, V, type, l);
648 IntegerLiteral::Create(ASTContext &C, EmptyShell Empty) {
649 return new (C) IntegerLiteral(Empty);
652 FloatingLiteral::FloatingLiteral(ASTContext &C, const llvm::APFloat &V,
653 bool isexact, QualType Type, SourceLocation L)
654 : Expr(FloatingLiteralClass, Type, VK_RValue, OK_Ordinary, false, false,
655 false, false), Loc(L) {
656 FloatingLiteralBits.IsIEEE =
657 &C.getTargetInfo().getLongDoubleFormat() == &llvm::APFloat::IEEEquad;
658 FloatingLiteralBits.IsExact = isexact;
662 FloatingLiteral::FloatingLiteral(ASTContext &C, EmptyShell Empty)
663 : Expr(FloatingLiteralClass, Empty) {
664 FloatingLiteralBits.IsIEEE =
665 &C.getTargetInfo().getLongDoubleFormat() == &llvm::APFloat::IEEEquad;
666 FloatingLiteralBits.IsExact = false;
670 FloatingLiteral::Create(ASTContext &C, const llvm::APFloat &V,
671 bool isexact, QualType Type, SourceLocation L) {
672 return new (C) FloatingLiteral(C, V, isexact, Type, L);
676 FloatingLiteral::Create(ASTContext &C, EmptyShell Empty) {
677 return new (C) FloatingLiteral(C, Empty);
680 /// getValueAsApproximateDouble - This returns the value as an inaccurate
681 /// double. Note that this may cause loss of precision, but is useful for
682 /// debugging dumps, etc.
683 double FloatingLiteral::getValueAsApproximateDouble() const {
684 llvm::APFloat V = getValue();
686 V.convert(llvm::APFloat::IEEEdouble, llvm::APFloat::rmNearestTiesToEven,
688 return V.convertToDouble();
691 int StringLiteral::mapCharByteWidth(TargetInfo const &target,StringKind k) {
692 int CharByteWidth = 0;
696 CharByteWidth = target.getCharWidth();
699 CharByteWidth = target.getWCharWidth();
702 CharByteWidth = target.getChar16Width();
705 CharByteWidth = target.getChar32Width();
708 assert((CharByteWidth & 7) == 0 && "Assumes character size is byte multiple");
710 assert((CharByteWidth==1 || CharByteWidth==2 || CharByteWidth==4)
711 && "character byte widths supported are 1, 2, and 4 only");
712 return CharByteWidth;
715 StringLiteral *StringLiteral::Create(ASTContext &C, StringRef Str,
716 StringKind Kind, bool Pascal, QualType Ty,
717 const SourceLocation *Loc,
719 // Allocate enough space for the StringLiteral plus an array of locations for
720 // any concatenated string tokens.
721 void *Mem = C.Allocate(sizeof(StringLiteral)+
722 sizeof(SourceLocation)*(NumStrs-1),
723 llvm::alignOf<StringLiteral>());
724 StringLiteral *SL = new (Mem) StringLiteral(Ty);
726 // OPTIMIZE: could allocate this appended to the StringLiteral.
727 SL->setString(C,Str,Kind,Pascal);
729 SL->TokLocs[0] = Loc[0];
730 SL->NumConcatenated = NumStrs;
733 memcpy(&SL->TokLocs[1], Loc+1, sizeof(SourceLocation)*(NumStrs-1));
737 StringLiteral *StringLiteral::CreateEmpty(ASTContext &C, unsigned NumStrs) {
738 void *Mem = C.Allocate(sizeof(StringLiteral)+
739 sizeof(SourceLocation)*(NumStrs-1),
740 llvm::alignOf<StringLiteral>());
741 StringLiteral *SL = new (Mem) StringLiteral(QualType());
742 SL->CharByteWidth = 0;
744 SL->NumConcatenated = NumStrs;
748 void StringLiteral::outputString(raw_ostream &OS) {
750 case Ascii: break; // no prefix.
751 case Wide: OS << 'L'; break;
752 case UTF8: OS << "u8"; break;
753 case UTF16: OS << 'u'; break;
754 case UTF32: OS << 'U'; break;
757 static const char Hex[] = "0123456789ABCDEF";
759 unsigned LastSlashX = getLength();
760 for (unsigned I = 0, N = getLength(); I != N; ++I) {
761 switch (uint32_t Char = getCodeUnit(I)) {
763 // FIXME: Convert UTF-8 back to codepoints before rendering.
765 // Convert UTF-16 surrogate pairs back to codepoints before rendering.
766 // Leave invalid surrogates alone; we'll use \x for those.
767 if (getKind() == UTF16 && I != N - 1 && Char >= 0xd800 &&
769 uint32_t Trail = getCodeUnit(I + 1);
770 if (Trail >= 0xdc00 && Trail <= 0xdfff) {
771 Char = 0x10000 + ((Char - 0xd800) << 10) + (Trail - 0xdc00);
777 // If this is a wide string, output characters over 0xff using \x
778 // escapes. Otherwise, this is a UTF-16 or UTF-32 string, and Char is a
779 // codepoint: use \x escapes for invalid codepoints.
780 if (getKind() == Wide ||
781 (Char >= 0xd800 && Char <= 0xdfff) || Char >= 0x110000) {
782 // FIXME: Is this the best way to print wchar_t?
785 while ((Char >> Shift) == 0)
787 for (/**/; Shift >= 0; Shift -= 4)
788 OS << Hex[(Char >> Shift) & 15];
795 << Hex[(Char >> 20) & 15]
796 << Hex[(Char >> 16) & 15];
799 OS << Hex[(Char >> 12) & 15]
800 << Hex[(Char >> 8) & 15]
801 << Hex[(Char >> 4) & 15]
802 << Hex[(Char >> 0) & 15];
806 // If we used \x... for the previous character, and this character is a
807 // hexadecimal digit, prevent it being slurped as part of the \x.
808 if (LastSlashX + 1 == I) {
810 case '0': case '1': case '2': case '3': case '4':
811 case '5': case '6': case '7': case '8': case '9':
812 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
813 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
818 assert(Char <= 0xff &&
819 "Characters above 0xff should already have been handled.");
823 else // Output anything hard as an octal escape.
825 << (char)('0' + ((Char >> 6) & 7))
826 << (char)('0' + ((Char >> 3) & 7))
827 << (char)('0' + ((Char >> 0) & 7));
829 // Handle some common non-printable cases to make dumps prettier.
830 case '\\': OS << "\\\\"; break;
831 case '"': OS << "\\\""; break;
832 case '\n': OS << "\\n"; break;
833 case '\t': OS << "\\t"; break;
834 case '\a': OS << "\\a"; break;
835 case '\b': OS << "\\b"; break;
841 void StringLiteral::setString(ASTContext &C, StringRef Str,
842 StringKind Kind, bool IsPascal) {
843 //FIXME: we assume that the string data comes from a target that uses the same
844 // code unit size and endianess for the type of string.
846 this->IsPascal = IsPascal;
848 CharByteWidth = mapCharByteWidth(C.getTargetInfo(),Kind);
849 assert((Str.size()%CharByteWidth == 0)
850 && "size of data must be multiple of CharByteWidth");
851 Length = Str.size()/CharByteWidth;
853 switch(CharByteWidth) {
855 char *AStrData = new (C) char[Length];
856 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
857 StrData.asChar = AStrData;
861 uint16_t *AStrData = new (C) uint16_t[Length];
862 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
863 StrData.asUInt16 = AStrData;
867 uint32_t *AStrData = new (C) uint32_t[Length];
868 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
869 StrData.asUInt32 = AStrData;
873 assert(false && "unsupported CharByteWidth");
877 /// getLocationOfByte - Return a source location that points to the specified
878 /// byte of this string literal.
880 /// Strings are amazingly complex. They can be formed from multiple tokens and
881 /// can have escape sequences in them in addition to the usual trigraph and
882 /// escaped newline business. This routine handles this complexity.
884 SourceLocation StringLiteral::
885 getLocationOfByte(unsigned ByteNo, const SourceManager &SM,
886 const LangOptions &Features, const TargetInfo &Target) const {
887 assert((Kind == StringLiteral::Ascii || Kind == StringLiteral::UTF8) &&
888 "Only narrow string literals are currently supported");
890 // Loop over all of the tokens in this string until we find the one that
891 // contains the byte we're looking for.
894 assert(TokNo < getNumConcatenated() && "Invalid byte number!");
895 SourceLocation StrTokLoc = getStrTokenLoc(TokNo);
897 // Get the spelling of the string so that we can get the data that makes up
898 // the string literal, not the identifier for the macro it is potentially
900 SourceLocation StrTokSpellingLoc = SM.getSpellingLoc(StrTokLoc);
902 // Re-lex the token to get its length and original spelling.
903 std::pair<FileID, unsigned> LocInfo =SM.getDecomposedLoc(StrTokSpellingLoc);
904 bool Invalid = false;
905 StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid);
907 return StrTokSpellingLoc;
909 const char *StrData = Buffer.data()+LocInfo.second;
911 // Create a lexer starting at the beginning of this token.
912 Lexer TheLexer(SM.getLocForStartOfFile(LocInfo.first), Features,
913 Buffer.begin(), StrData, Buffer.end());
915 TheLexer.LexFromRawLexer(TheTok);
917 // Use the StringLiteralParser to compute the length of the string in bytes.
918 StringLiteralParser SLP(&TheTok, 1, SM, Features, Target);
919 unsigned TokNumBytes = SLP.GetStringLength();
921 // If the byte is in this token, return the location of the byte.
922 if (ByteNo < TokNumBytes ||
923 (ByteNo == TokNumBytes && TokNo == getNumConcatenated() - 1)) {
924 unsigned Offset = SLP.getOffsetOfStringByte(TheTok, ByteNo);
926 // Now that we know the offset of the token in the spelling, use the
927 // preprocessor to get the offset in the original source.
928 return Lexer::AdvanceToTokenCharacter(StrTokLoc, Offset, SM, Features);
931 // Move to the next string token.
933 ByteNo -= TokNumBytes;
939 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
940 /// corresponds to, e.g. "sizeof" or "[pre]++".
941 StringRef UnaryOperator::getOpcodeStr(Opcode Op) {
943 case UO_PostInc: return "++";
944 case UO_PostDec: return "--";
945 case UO_PreInc: return "++";
946 case UO_PreDec: return "--";
947 case UO_AddrOf: return "&";
948 case UO_Deref: return "*";
949 case UO_Plus: return "+";
950 case UO_Minus: return "-";
951 case UO_Not: return "~";
952 case UO_LNot: return "!";
953 case UO_Real: return "__real";
954 case UO_Imag: return "__imag";
955 case UO_Extension: return "__extension__";
957 llvm_unreachable("Unknown unary operator");
961 UnaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix) {
963 default: llvm_unreachable("No unary operator for overloaded function");
964 case OO_PlusPlus: return Postfix ? UO_PostInc : UO_PreInc;
965 case OO_MinusMinus: return Postfix ? UO_PostDec : UO_PreDec;
966 case OO_Amp: return UO_AddrOf;
967 case OO_Star: return UO_Deref;
968 case OO_Plus: return UO_Plus;
969 case OO_Minus: return UO_Minus;
970 case OO_Tilde: return UO_Not;
971 case OO_Exclaim: return UO_LNot;
975 OverloadedOperatorKind UnaryOperator::getOverloadedOperator(Opcode Opc) {
977 case UO_PostInc: case UO_PreInc: return OO_PlusPlus;
978 case UO_PostDec: case UO_PreDec: return OO_MinusMinus;
979 case UO_AddrOf: return OO_Amp;
980 case UO_Deref: return OO_Star;
981 case UO_Plus: return OO_Plus;
982 case UO_Minus: return OO_Minus;
983 case UO_Not: return OO_Tilde;
984 case UO_LNot: return OO_Exclaim;
985 default: return OO_None;
990 //===----------------------------------------------------------------------===//
991 // Postfix Operators.
992 //===----------------------------------------------------------------------===//
994 CallExpr::CallExpr(ASTContext& C, StmtClass SC, Expr *fn, unsigned NumPreArgs,
995 ArrayRef<Expr*> args, QualType t, ExprValueKind VK,
996 SourceLocation rparenloc)
997 : Expr(SC, t, VK, OK_Ordinary,
998 fn->isTypeDependent(),
999 fn->isValueDependent(),
1000 fn->isInstantiationDependent(),
1001 fn->containsUnexpandedParameterPack()),
1002 NumArgs(args.size()) {
1004 SubExprs = new (C) Stmt*[args.size()+PREARGS_START+NumPreArgs];
1006 for (unsigned i = 0; i != args.size(); ++i) {
1007 if (args[i]->isTypeDependent())
1008 ExprBits.TypeDependent = true;
1009 if (args[i]->isValueDependent())
1010 ExprBits.ValueDependent = true;
1011 if (args[i]->isInstantiationDependent())
1012 ExprBits.InstantiationDependent = true;
1013 if (args[i]->containsUnexpandedParameterPack())
1014 ExprBits.ContainsUnexpandedParameterPack = true;
1016 SubExprs[i+PREARGS_START+NumPreArgs] = args[i];
1019 CallExprBits.NumPreArgs = NumPreArgs;
1020 RParenLoc = rparenloc;
1023 CallExpr::CallExpr(ASTContext& C, Expr *fn, ArrayRef<Expr*> args,
1024 QualType t, ExprValueKind VK, SourceLocation rparenloc)
1025 : Expr(CallExprClass, t, VK, OK_Ordinary,
1026 fn->isTypeDependent(),
1027 fn->isValueDependent(),
1028 fn->isInstantiationDependent(),
1029 fn->containsUnexpandedParameterPack()),
1030 NumArgs(args.size()) {
1032 SubExprs = new (C) Stmt*[args.size()+PREARGS_START];
1034 for (unsigned i = 0; i != args.size(); ++i) {
1035 if (args[i]->isTypeDependent())
1036 ExprBits.TypeDependent = true;
1037 if (args[i]->isValueDependent())
1038 ExprBits.ValueDependent = true;
1039 if (args[i]->isInstantiationDependent())
1040 ExprBits.InstantiationDependent = true;
1041 if (args[i]->containsUnexpandedParameterPack())
1042 ExprBits.ContainsUnexpandedParameterPack = true;
1044 SubExprs[i+PREARGS_START] = args[i];
1047 CallExprBits.NumPreArgs = 0;
1048 RParenLoc = rparenloc;
1051 CallExpr::CallExpr(ASTContext &C, StmtClass SC, EmptyShell Empty)
1052 : Expr(SC, Empty), SubExprs(0), NumArgs(0) {
1053 // FIXME: Why do we allocate this?
1054 SubExprs = new (C) Stmt*[PREARGS_START];
1055 CallExprBits.NumPreArgs = 0;
1058 CallExpr::CallExpr(ASTContext &C, StmtClass SC, unsigned NumPreArgs,
1060 : Expr(SC, Empty), SubExprs(0), NumArgs(0) {
1061 // FIXME: Why do we allocate this?
1062 SubExprs = new (C) Stmt*[PREARGS_START+NumPreArgs];
1063 CallExprBits.NumPreArgs = NumPreArgs;
1066 Decl *CallExpr::getCalleeDecl() {
1067 Expr *CEE = getCallee()->IgnoreParenImpCasts();
1069 while (SubstNonTypeTemplateParmExpr *NTTP
1070 = dyn_cast<SubstNonTypeTemplateParmExpr>(CEE)) {
1071 CEE = NTTP->getReplacement()->IgnoreParenCasts();
1074 // If we're calling a dereference, look at the pointer instead.
1075 if (BinaryOperator *BO = dyn_cast<BinaryOperator>(CEE)) {
1076 if (BO->isPtrMemOp())
1077 CEE = BO->getRHS()->IgnoreParenCasts();
1078 } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(CEE)) {
1079 if (UO->getOpcode() == UO_Deref)
1080 CEE = UO->getSubExpr()->IgnoreParenCasts();
1082 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE))
1083 return DRE->getDecl();
1084 if (MemberExpr *ME = dyn_cast<MemberExpr>(CEE))
1085 return ME->getMemberDecl();
1090 FunctionDecl *CallExpr::getDirectCallee() {
1091 return dyn_cast_or_null<FunctionDecl>(getCalleeDecl());
1094 /// setNumArgs - This changes the number of arguments present in this call.
1095 /// Any orphaned expressions are deleted by this, and any new operands are set
1097 void CallExpr::setNumArgs(ASTContext& C, unsigned NumArgs) {
1098 // No change, just return.
1099 if (NumArgs == getNumArgs()) return;
1101 // If shrinking # arguments, just delete the extras and forgot them.
1102 if (NumArgs < getNumArgs()) {
1103 this->NumArgs = NumArgs;
1107 // Otherwise, we are growing the # arguments. New an bigger argument array.
1108 unsigned NumPreArgs = getNumPreArgs();
1109 Stmt **NewSubExprs = new (C) Stmt*[NumArgs+PREARGS_START+NumPreArgs];
1111 for (unsigned i = 0; i != getNumArgs()+PREARGS_START+NumPreArgs; ++i)
1112 NewSubExprs[i] = SubExprs[i];
1113 // Null out new args.
1114 for (unsigned i = getNumArgs()+PREARGS_START+NumPreArgs;
1115 i != NumArgs+PREARGS_START+NumPreArgs; ++i)
1118 if (SubExprs) C.Deallocate(SubExprs);
1119 SubExprs = NewSubExprs;
1120 this->NumArgs = NumArgs;
1123 /// isBuiltinCall - If this is a call to a builtin, return the builtin ID. If
1125 unsigned CallExpr::isBuiltinCall() const {
1126 // All simple function calls (e.g. func()) are implicitly cast to pointer to
1127 // function. As a result, we try and obtain the DeclRefExpr from the
1128 // ImplicitCastExpr.
1129 const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee());
1130 if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()).
1133 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr());
1137 const FunctionDecl *FDecl = dyn_cast<FunctionDecl>(DRE->getDecl());
1141 if (!FDecl->getIdentifier())
1144 return FDecl->getBuiltinID();
1147 QualType CallExpr::getCallReturnType() const {
1148 QualType CalleeType = getCallee()->getType();
1149 if (const PointerType *FnTypePtr = CalleeType->getAs<PointerType>())
1150 CalleeType = FnTypePtr->getPointeeType();
1151 else if (const BlockPointerType *BPT = CalleeType->getAs<BlockPointerType>())
1152 CalleeType = BPT->getPointeeType();
1153 else if (CalleeType->isSpecificPlaceholderType(BuiltinType::BoundMember))
1154 // This should never be overloaded and so should never return null.
1155 CalleeType = Expr::findBoundMemberType(getCallee());
1157 const FunctionType *FnType = CalleeType->castAs<FunctionType>();
1158 return FnType->getResultType();
1161 SourceRange CallExpr::getSourceRange() const {
1162 if (isa<CXXOperatorCallExpr>(this))
1163 return cast<CXXOperatorCallExpr>(this)->getSourceRange();
1165 SourceLocation begin = getCallee()->getLocStart();
1166 if (begin.isInvalid() && getNumArgs() > 0)
1167 begin = getArg(0)->getLocStart();
1168 SourceLocation end = getRParenLoc();
1169 if (end.isInvalid() && getNumArgs() > 0)
1170 end = getArg(getNumArgs() - 1)->getLocEnd();
1171 return SourceRange(begin, end);
1173 SourceLocation CallExpr::getLocStart() const {
1174 if (isa<CXXOperatorCallExpr>(this))
1175 return cast<CXXOperatorCallExpr>(this)->getSourceRange().getBegin();
1177 SourceLocation begin = getCallee()->getLocStart();
1178 if (begin.isInvalid() && getNumArgs() > 0)
1179 begin = getArg(0)->getLocStart();
1182 SourceLocation CallExpr::getLocEnd() const {
1183 if (isa<CXXOperatorCallExpr>(this))
1184 return cast<CXXOperatorCallExpr>(this)->getSourceRange().getEnd();
1186 SourceLocation end = getRParenLoc();
1187 if (end.isInvalid() && getNumArgs() > 0)
1188 end = getArg(getNumArgs() - 1)->getLocEnd();
1192 OffsetOfExpr *OffsetOfExpr::Create(ASTContext &C, QualType type,
1193 SourceLocation OperatorLoc,
1194 TypeSourceInfo *tsi,
1195 ArrayRef<OffsetOfNode> comps,
1196 ArrayRef<Expr*> exprs,
1197 SourceLocation RParenLoc) {
1198 void *Mem = C.Allocate(sizeof(OffsetOfExpr) +
1199 sizeof(OffsetOfNode) * comps.size() +
1200 sizeof(Expr*) * exprs.size());
1202 return new (Mem) OffsetOfExpr(C, type, OperatorLoc, tsi, comps, exprs,
1206 OffsetOfExpr *OffsetOfExpr::CreateEmpty(ASTContext &C,
1207 unsigned numComps, unsigned numExprs) {
1208 void *Mem = C.Allocate(sizeof(OffsetOfExpr) +
1209 sizeof(OffsetOfNode) * numComps +
1210 sizeof(Expr*) * numExprs);
1211 return new (Mem) OffsetOfExpr(numComps, numExprs);
1214 OffsetOfExpr::OffsetOfExpr(ASTContext &C, QualType type,
1215 SourceLocation OperatorLoc, TypeSourceInfo *tsi,
1216 ArrayRef<OffsetOfNode> comps, ArrayRef<Expr*> exprs,
1217 SourceLocation RParenLoc)
1218 : Expr(OffsetOfExprClass, type, VK_RValue, OK_Ordinary,
1219 /*TypeDependent=*/false,
1220 /*ValueDependent=*/tsi->getType()->isDependentType(),
1221 tsi->getType()->isInstantiationDependentType(),
1222 tsi->getType()->containsUnexpandedParameterPack()),
1223 OperatorLoc(OperatorLoc), RParenLoc(RParenLoc), TSInfo(tsi),
1224 NumComps(comps.size()), NumExprs(exprs.size())
1226 for (unsigned i = 0; i != comps.size(); ++i) {
1227 setComponent(i, comps[i]);
1230 for (unsigned i = 0; i != exprs.size(); ++i) {
1231 if (exprs[i]->isTypeDependent() || exprs[i]->isValueDependent())
1232 ExprBits.ValueDependent = true;
1233 if (exprs[i]->containsUnexpandedParameterPack())
1234 ExprBits.ContainsUnexpandedParameterPack = true;
1236 setIndexExpr(i, exprs[i]);
1240 IdentifierInfo *OffsetOfExpr::OffsetOfNode::getFieldName() const {
1241 assert(getKind() == Field || getKind() == Identifier);
1242 if (getKind() == Field)
1243 return getField()->getIdentifier();
1245 return reinterpret_cast<IdentifierInfo *> (Data & ~(uintptr_t)Mask);
1248 MemberExpr *MemberExpr::Create(ASTContext &C, Expr *base, bool isarrow,
1249 NestedNameSpecifierLoc QualifierLoc,
1250 SourceLocation TemplateKWLoc,
1251 ValueDecl *memberdecl,
1252 DeclAccessPair founddecl,
1253 DeclarationNameInfo nameinfo,
1254 const TemplateArgumentListInfo *targs,
1257 ExprObjectKind ok) {
1258 std::size_t Size = sizeof(MemberExpr);
1260 bool hasQualOrFound = (QualifierLoc ||
1261 founddecl.getDecl() != memberdecl ||
1262 founddecl.getAccess() != memberdecl->getAccess());
1264 Size += sizeof(MemberNameQualifier);
1267 Size += ASTTemplateKWAndArgsInfo::sizeFor(targs->size());
1268 else if (TemplateKWLoc.isValid())
1269 Size += ASTTemplateKWAndArgsInfo::sizeFor(0);
1271 void *Mem = C.Allocate(Size, llvm::alignOf<MemberExpr>());
1272 MemberExpr *E = new (Mem) MemberExpr(base, isarrow, memberdecl, nameinfo,
1275 if (hasQualOrFound) {
1276 // FIXME: Wrong. We should be looking at the member declaration we found.
1277 if (QualifierLoc && QualifierLoc.getNestedNameSpecifier()->isDependent()) {
1278 E->setValueDependent(true);
1279 E->setTypeDependent(true);
1280 E->setInstantiationDependent(true);
1282 else if (QualifierLoc &&
1283 QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent())
1284 E->setInstantiationDependent(true);
1286 E->HasQualifierOrFoundDecl = true;
1288 MemberNameQualifier *NQ = E->getMemberQualifier();
1289 NQ->QualifierLoc = QualifierLoc;
1290 NQ->FoundDecl = founddecl;
1293 E->HasTemplateKWAndArgsInfo = (targs || TemplateKWLoc.isValid());
1296 bool Dependent = false;
1297 bool InstantiationDependent = false;
1298 bool ContainsUnexpandedParameterPack = false;
1299 E->getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc, *targs,
1301 InstantiationDependent,
1302 ContainsUnexpandedParameterPack);
1303 if (InstantiationDependent)
1304 E->setInstantiationDependent(true);
1305 } else if (TemplateKWLoc.isValid()) {
1306 E->getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc);
1312 SourceRange MemberExpr::getSourceRange() const {
1313 return SourceRange(getLocStart(), getLocEnd());
1315 SourceLocation MemberExpr::getLocStart() const {
1316 if (isImplicitAccess()) {
1318 return getQualifierLoc().getBeginLoc();
1322 // FIXME: We don't want this to happen. Rather, we should be able to
1323 // detect all kinds of implicit accesses more cleanly.
1324 SourceLocation BaseStartLoc = getBase()->getLocStart();
1325 if (BaseStartLoc.isValid())
1326 return BaseStartLoc;
1329 SourceLocation MemberExpr::getLocEnd() const {
1330 SourceLocation EndLoc = getMemberNameInfo().getEndLoc();
1331 if (hasExplicitTemplateArgs())
1332 EndLoc = getRAngleLoc();
1333 else if (EndLoc.isInvalid())
1334 EndLoc = getBase()->getLocEnd();
1338 void CastExpr::CheckCastConsistency() const {
1339 switch (getCastKind()) {
1340 case CK_DerivedToBase:
1341 case CK_UncheckedDerivedToBase:
1342 case CK_DerivedToBaseMemberPointer:
1343 case CK_BaseToDerived:
1344 case CK_BaseToDerivedMemberPointer:
1345 assert(!path_empty() && "Cast kind should have a base path!");
1348 case CK_CPointerToObjCPointerCast:
1349 assert(getType()->isObjCObjectPointerType());
1350 assert(getSubExpr()->getType()->isPointerType());
1351 goto CheckNoBasePath;
1353 case CK_BlockPointerToObjCPointerCast:
1354 assert(getType()->isObjCObjectPointerType());
1355 assert(getSubExpr()->getType()->isBlockPointerType());
1356 goto CheckNoBasePath;
1358 case CK_ReinterpretMemberPointer:
1359 assert(getType()->isMemberPointerType());
1360 assert(getSubExpr()->getType()->isMemberPointerType());
1361 goto CheckNoBasePath;
1364 // Arbitrary casts to C pointer types count as bitcasts.
1365 // Otherwise, we should only have block and ObjC pointer casts
1366 // here if they stay within the type kind.
1367 if (!getType()->isPointerType()) {
1368 assert(getType()->isObjCObjectPointerType() ==
1369 getSubExpr()->getType()->isObjCObjectPointerType());
1370 assert(getType()->isBlockPointerType() ==
1371 getSubExpr()->getType()->isBlockPointerType());
1373 goto CheckNoBasePath;
1375 case CK_AnyPointerToBlockPointerCast:
1376 assert(getType()->isBlockPointerType());
1377 assert(getSubExpr()->getType()->isAnyPointerType() &&
1378 !getSubExpr()->getType()->isBlockPointerType());
1379 goto CheckNoBasePath;
1381 case CK_CopyAndAutoreleaseBlockObject:
1382 assert(getType()->isBlockPointerType());
1383 assert(getSubExpr()->getType()->isBlockPointerType());
1384 goto CheckNoBasePath;
1386 case CK_FunctionToPointerDecay:
1387 assert(getType()->isPointerType());
1388 assert(getSubExpr()->getType()->isFunctionType());
1389 goto CheckNoBasePath;
1391 // These should not have an inheritance path.
1394 case CK_ArrayToPointerDecay:
1395 case CK_NullToMemberPointer:
1396 case CK_NullToPointer:
1397 case CK_ConstructorConversion:
1398 case CK_IntegralToPointer:
1399 case CK_PointerToIntegral:
1401 case CK_VectorSplat:
1402 case CK_IntegralCast:
1403 case CK_IntegralToFloating:
1404 case CK_FloatingToIntegral:
1405 case CK_FloatingCast:
1406 case CK_ObjCObjectLValueCast:
1407 case CK_FloatingRealToComplex:
1408 case CK_FloatingComplexToReal:
1409 case CK_FloatingComplexCast:
1410 case CK_FloatingComplexToIntegralComplex:
1411 case CK_IntegralRealToComplex:
1412 case CK_IntegralComplexToReal:
1413 case CK_IntegralComplexCast:
1414 case CK_IntegralComplexToFloatingComplex:
1415 case CK_ARCProduceObject:
1416 case CK_ARCConsumeObject:
1417 case CK_ARCReclaimReturnedObject:
1418 case CK_ARCExtendBlockObject:
1419 assert(!getType()->isBooleanType() && "unheralded conversion to bool");
1420 goto CheckNoBasePath;
1423 case CK_LValueToRValue:
1425 case CK_AtomicToNonAtomic:
1426 case CK_NonAtomicToAtomic:
1427 case CK_PointerToBoolean:
1428 case CK_IntegralToBoolean:
1429 case CK_FloatingToBoolean:
1430 case CK_MemberPointerToBoolean:
1431 case CK_FloatingComplexToBoolean:
1432 case CK_IntegralComplexToBoolean:
1433 case CK_LValueBitCast: // -> bool&
1434 case CK_UserDefinedConversion: // operator bool()
1435 case CK_BuiltinFnToFnPtr:
1437 assert(path_empty() && "Cast kind should not have a base path!");
1442 const char *CastExpr::getCastKindName() const {
1443 switch (getCastKind()) {
1448 case CK_LValueBitCast:
1449 return "LValueBitCast";
1450 case CK_LValueToRValue:
1451 return "LValueToRValue";
1454 case CK_BaseToDerived:
1455 return "BaseToDerived";
1456 case CK_DerivedToBase:
1457 return "DerivedToBase";
1458 case CK_UncheckedDerivedToBase:
1459 return "UncheckedDerivedToBase";
1464 case CK_ArrayToPointerDecay:
1465 return "ArrayToPointerDecay";
1466 case CK_FunctionToPointerDecay:
1467 return "FunctionToPointerDecay";
1468 case CK_NullToMemberPointer:
1469 return "NullToMemberPointer";
1470 case CK_NullToPointer:
1471 return "NullToPointer";
1472 case CK_BaseToDerivedMemberPointer:
1473 return "BaseToDerivedMemberPointer";
1474 case CK_DerivedToBaseMemberPointer:
1475 return "DerivedToBaseMemberPointer";
1476 case CK_ReinterpretMemberPointer:
1477 return "ReinterpretMemberPointer";
1478 case CK_UserDefinedConversion:
1479 return "UserDefinedConversion";
1480 case CK_ConstructorConversion:
1481 return "ConstructorConversion";
1482 case CK_IntegralToPointer:
1483 return "IntegralToPointer";
1484 case CK_PointerToIntegral:
1485 return "PointerToIntegral";
1486 case CK_PointerToBoolean:
1487 return "PointerToBoolean";
1490 case CK_VectorSplat:
1491 return "VectorSplat";
1492 case CK_IntegralCast:
1493 return "IntegralCast";
1494 case CK_IntegralToBoolean:
1495 return "IntegralToBoolean";
1496 case CK_IntegralToFloating:
1497 return "IntegralToFloating";
1498 case CK_FloatingToIntegral:
1499 return "FloatingToIntegral";
1500 case CK_FloatingCast:
1501 return "FloatingCast";
1502 case CK_FloatingToBoolean:
1503 return "FloatingToBoolean";
1504 case CK_MemberPointerToBoolean:
1505 return "MemberPointerToBoolean";
1506 case CK_CPointerToObjCPointerCast:
1507 return "CPointerToObjCPointerCast";
1508 case CK_BlockPointerToObjCPointerCast:
1509 return "BlockPointerToObjCPointerCast";
1510 case CK_AnyPointerToBlockPointerCast:
1511 return "AnyPointerToBlockPointerCast";
1512 case CK_ObjCObjectLValueCast:
1513 return "ObjCObjectLValueCast";
1514 case CK_FloatingRealToComplex:
1515 return "FloatingRealToComplex";
1516 case CK_FloatingComplexToReal:
1517 return "FloatingComplexToReal";
1518 case CK_FloatingComplexToBoolean:
1519 return "FloatingComplexToBoolean";
1520 case CK_FloatingComplexCast:
1521 return "FloatingComplexCast";
1522 case CK_FloatingComplexToIntegralComplex:
1523 return "FloatingComplexToIntegralComplex";
1524 case CK_IntegralRealToComplex:
1525 return "IntegralRealToComplex";
1526 case CK_IntegralComplexToReal:
1527 return "IntegralComplexToReal";
1528 case CK_IntegralComplexToBoolean:
1529 return "IntegralComplexToBoolean";
1530 case CK_IntegralComplexCast:
1531 return "IntegralComplexCast";
1532 case CK_IntegralComplexToFloatingComplex:
1533 return "IntegralComplexToFloatingComplex";
1534 case CK_ARCConsumeObject:
1535 return "ARCConsumeObject";
1536 case CK_ARCProduceObject:
1537 return "ARCProduceObject";
1538 case CK_ARCReclaimReturnedObject:
1539 return "ARCReclaimReturnedObject";
1540 case CK_ARCExtendBlockObject:
1541 return "ARCCExtendBlockObject";
1542 case CK_AtomicToNonAtomic:
1543 return "AtomicToNonAtomic";
1544 case CK_NonAtomicToAtomic:
1545 return "NonAtomicToAtomic";
1546 case CK_CopyAndAutoreleaseBlockObject:
1547 return "CopyAndAutoreleaseBlockObject";
1548 case CK_BuiltinFnToFnPtr:
1549 return "BuiltinFnToFnPtr";
1552 llvm_unreachable("Unhandled cast kind!");
1555 Expr *CastExpr::getSubExprAsWritten() {
1559 SubExpr = E->getSubExpr();
1561 // Skip through reference binding to temporary.
1562 if (MaterializeTemporaryExpr *Materialize
1563 = dyn_cast<MaterializeTemporaryExpr>(SubExpr))
1564 SubExpr = Materialize->GetTemporaryExpr();
1566 // Skip any temporary bindings; they're implicit.
1567 if (CXXBindTemporaryExpr *Binder = dyn_cast<CXXBindTemporaryExpr>(SubExpr))
1568 SubExpr = Binder->getSubExpr();
1570 // Conversions by constructor and conversion functions have a
1571 // subexpression describing the call; strip it off.
1572 if (E->getCastKind() == CK_ConstructorConversion)
1573 SubExpr = cast<CXXConstructExpr>(SubExpr)->getArg(0);
1574 else if (E->getCastKind() == CK_UserDefinedConversion)
1575 SubExpr = cast<CXXMemberCallExpr>(SubExpr)->getImplicitObjectArgument();
1577 // If the subexpression we're left with is an implicit cast, look
1578 // through that, too.
1579 } while ((E = dyn_cast<ImplicitCastExpr>(SubExpr)));
1584 CXXBaseSpecifier **CastExpr::path_buffer() {
1585 switch (getStmtClass()) {
1586 #define ABSTRACT_STMT(x)
1587 #define CASTEXPR(Type, Base) \
1588 case Stmt::Type##Class: \
1589 return reinterpret_cast<CXXBaseSpecifier**>(static_cast<Type*>(this)+1);
1590 #define STMT(Type, Base)
1591 #include "clang/AST/StmtNodes.inc"
1593 llvm_unreachable("non-cast expressions not possible here");
1597 void CastExpr::setCastPath(const CXXCastPath &Path) {
1598 assert(Path.size() == path_size());
1599 memcpy(path_buffer(), Path.data(), Path.size() * sizeof(CXXBaseSpecifier*));
1602 ImplicitCastExpr *ImplicitCastExpr::Create(ASTContext &C, QualType T,
1603 CastKind Kind, Expr *Operand,
1604 const CXXCastPath *BasePath,
1606 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1608 C.Allocate(sizeof(ImplicitCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1609 ImplicitCastExpr *E =
1610 new (Buffer) ImplicitCastExpr(T, Kind, Operand, PathSize, VK);
1611 if (PathSize) E->setCastPath(*BasePath);
1615 ImplicitCastExpr *ImplicitCastExpr::CreateEmpty(ASTContext &C,
1616 unsigned PathSize) {
1618 C.Allocate(sizeof(ImplicitCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1619 return new (Buffer) ImplicitCastExpr(EmptyShell(), PathSize);
1623 CStyleCastExpr *CStyleCastExpr::Create(ASTContext &C, QualType T,
1624 ExprValueKind VK, CastKind K, Expr *Op,
1625 const CXXCastPath *BasePath,
1626 TypeSourceInfo *WrittenTy,
1627 SourceLocation L, SourceLocation R) {
1628 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1630 C.Allocate(sizeof(CStyleCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1632 new (Buffer) CStyleCastExpr(T, VK, K, Op, PathSize, WrittenTy, L, R);
1633 if (PathSize) E->setCastPath(*BasePath);
1637 CStyleCastExpr *CStyleCastExpr::CreateEmpty(ASTContext &C, unsigned PathSize) {
1639 C.Allocate(sizeof(CStyleCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1640 return new (Buffer) CStyleCastExpr(EmptyShell(), PathSize);
1643 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1644 /// corresponds to, e.g. "<<=".
1645 StringRef BinaryOperator::getOpcodeStr(Opcode Op) {
1647 case BO_PtrMemD: return ".*";
1648 case BO_PtrMemI: return "->*";
1649 case BO_Mul: return "*";
1650 case BO_Div: return "/";
1651 case BO_Rem: return "%";
1652 case BO_Add: return "+";
1653 case BO_Sub: return "-";
1654 case BO_Shl: return "<<";
1655 case BO_Shr: return ">>";
1656 case BO_LT: return "<";
1657 case BO_GT: return ">";
1658 case BO_LE: return "<=";
1659 case BO_GE: return ">=";
1660 case BO_EQ: return "==";
1661 case BO_NE: return "!=";
1662 case BO_And: return "&";
1663 case BO_Xor: return "^";
1664 case BO_Or: return "|";
1665 case BO_LAnd: return "&&";
1666 case BO_LOr: return "||";
1667 case BO_Assign: return "=";
1668 case BO_MulAssign: return "*=";
1669 case BO_DivAssign: return "/=";
1670 case BO_RemAssign: return "%=";
1671 case BO_AddAssign: return "+=";
1672 case BO_SubAssign: return "-=";
1673 case BO_ShlAssign: return "<<=";
1674 case BO_ShrAssign: return ">>=";
1675 case BO_AndAssign: return "&=";
1676 case BO_XorAssign: return "^=";
1677 case BO_OrAssign: return "|=";
1678 case BO_Comma: return ",";
1681 llvm_unreachable("Invalid OpCode!");
1685 BinaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO) {
1687 default: llvm_unreachable("Not an overloadable binary operator");
1688 case OO_Plus: return BO_Add;
1689 case OO_Minus: return BO_Sub;
1690 case OO_Star: return BO_Mul;
1691 case OO_Slash: return BO_Div;
1692 case OO_Percent: return BO_Rem;
1693 case OO_Caret: return BO_Xor;
1694 case OO_Amp: return BO_And;
1695 case OO_Pipe: return BO_Or;
1696 case OO_Equal: return BO_Assign;
1697 case OO_Less: return BO_LT;
1698 case OO_Greater: return BO_GT;
1699 case OO_PlusEqual: return BO_AddAssign;
1700 case OO_MinusEqual: return BO_SubAssign;
1701 case OO_StarEqual: return BO_MulAssign;
1702 case OO_SlashEqual: return BO_DivAssign;
1703 case OO_PercentEqual: return BO_RemAssign;
1704 case OO_CaretEqual: return BO_XorAssign;
1705 case OO_AmpEqual: return BO_AndAssign;
1706 case OO_PipeEqual: return BO_OrAssign;
1707 case OO_LessLess: return BO_Shl;
1708 case OO_GreaterGreater: return BO_Shr;
1709 case OO_LessLessEqual: return BO_ShlAssign;
1710 case OO_GreaterGreaterEqual: return BO_ShrAssign;
1711 case OO_EqualEqual: return BO_EQ;
1712 case OO_ExclaimEqual: return BO_NE;
1713 case OO_LessEqual: return BO_LE;
1714 case OO_GreaterEqual: return BO_GE;
1715 case OO_AmpAmp: return BO_LAnd;
1716 case OO_PipePipe: return BO_LOr;
1717 case OO_Comma: return BO_Comma;
1718 case OO_ArrowStar: return BO_PtrMemI;
1722 OverloadedOperatorKind BinaryOperator::getOverloadedOperator(Opcode Opc) {
1723 static const OverloadedOperatorKind OverOps[] = {
1724 /* .* Cannot be overloaded */OO_None, OO_ArrowStar,
1725 OO_Star, OO_Slash, OO_Percent,
1727 OO_LessLess, OO_GreaterGreater,
1728 OO_Less, OO_Greater, OO_LessEqual, OO_GreaterEqual,
1729 OO_EqualEqual, OO_ExclaimEqual,
1735 OO_Equal, OO_StarEqual,
1736 OO_SlashEqual, OO_PercentEqual,
1737 OO_PlusEqual, OO_MinusEqual,
1738 OO_LessLessEqual, OO_GreaterGreaterEqual,
1739 OO_AmpEqual, OO_CaretEqual,
1743 return OverOps[Opc];
1746 InitListExpr::InitListExpr(ASTContext &C, SourceLocation lbraceloc,
1747 ArrayRef<Expr*> initExprs, SourceLocation rbraceloc)
1748 : Expr(InitListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false,
1750 InitExprs(C, initExprs.size()),
1751 LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), AltForm(0, true)
1753 sawArrayRangeDesignator(false);
1754 setInitializesStdInitializerList(false);
1755 for (unsigned I = 0; I != initExprs.size(); ++I) {
1756 if (initExprs[I]->isTypeDependent())
1757 ExprBits.TypeDependent = true;
1758 if (initExprs[I]->isValueDependent())
1759 ExprBits.ValueDependent = true;
1760 if (initExprs[I]->isInstantiationDependent())
1761 ExprBits.InstantiationDependent = true;
1762 if (initExprs[I]->containsUnexpandedParameterPack())
1763 ExprBits.ContainsUnexpandedParameterPack = true;
1766 InitExprs.insert(C, InitExprs.end(), initExprs.begin(), initExprs.end());
1769 void InitListExpr::reserveInits(ASTContext &C, unsigned NumInits) {
1770 if (NumInits > InitExprs.size())
1771 InitExprs.reserve(C, NumInits);
1774 void InitListExpr::resizeInits(ASTContext &C, unsigned NumInits) {
1775 InitExprs.resize(C, NumInits, 0);
1778 Expr *InitListExpr::updateInit(ASTContext &C, unsigned Init, Expr *expr) {
1779 if (Init >= InitExprs.size()) {
1780 InitExprs.insert(C, InitExprs.end(), Init - InitExprs.size() + 1, 0);
1781 InitExprs.back() = expr;
1785 Expr *Result = cast_or_null<Expr>(InitExprs[Init]);
1786 InitExprs[Init] = expr;
1790 void InitListExpr::setArrayFiller(Expr *filler) {
1791 assert(!hasArrayFiller() && "Filler already set!");
1792 ArrayFillerOrUnionFieldInit = filler;
1793 // Fill out any "holes" in the array due to designated initializers.
1794 Expr **inits = getInits();
1795 for (unsigned i = 0, e = getNumInits(); i != e; ++i)
1800 bool InitListExpr::isStringLiteralInit() const {
1801 if (getNumInits() != 1)
1803 const ArrayType *AT = getType()->getAsArrayTypeUnsafe();
1804 if (!AT || !AT->getElementType()->isIntegerType())
1806 const Expr *Init = getInit(0)->IgnoreParens();
1807 return isa<StringLiteral>(Init) || isa<ObjCEncodeExpr>(Init);
1810 SourceRange InitListExpr::getSourceRange() const {
1811 if (InitListExpr *SyntacticForm = getSyntacticForm())
1812 return SyntacticForm->getSourceRange();
1813 SourceLocation Beg = LBraceLoc, End = RBraceLoc;
1814 if (Beg.isInvalid()) {
1815 // Find the first non-null initializer.
1816 for (InitExprsTy::const_iterator I = InitExprs.begin(),
1817 E = InitExprs.end();
1820 Beg = S->getLocStart();
1825 if (End.isInvalid()) {
1826 // Find the first non-null initializer from the end.
1827 for (InitExprsTy::const_reverse_iterator I = InitExprs.rbegin(),
1828 E = InitExprs.rend();
1831 End = S->getSourceRange().getEnd();
1836 return SourceRange(Beg, End);
1839 /// getFunctionType - Return the underlying function type for this block.
1841 const FunctionProtoType *BlockExpr::getFunctionType() const {
1842 // The block pointer is never sugared, but the function type might be.
1843 return cast<BlockPointerType>(getType())
1844 ->getPointeeType()->castAs<FunctionProtoType>();
1847 SourceLocation BlockExpr::getCaretLocation() const {
1848 return TheBlock->getCaretLocation();
1850 const Stmt *BlockExpr::getBody() const {
1851 return TheBlock->getBody();
1853 Stmt *BlockExpr::getBody() {
1854 return TheBlock->getBody();
1858 //===----------------------------------------------------------------------===//
1859 // Generic Expression Routines
1860 //===----------------------------------------------------------------------===//
1862 /// isUnusedResultAWarning - Return true if this immediate expression should
1863 /// be warned about if the result is unused. If so, fill in Loc and Ranges
1864 /// with location to warn on and the source range[s] to report with the
1866 bool Expr::isUnusedResultAWarning(const Expr *&WarnE, SourceLocation &Loc,
1867 SourceRange &R1, SourceRange &R2,
1868 ASTContext &Ctx) const {
1869 // Don't warn if the expr is type dependent. The type could end up
1870 // instantiating to void.
1871 if (isTypeDependent())
1874 switch (getStmtClass()) {
1876 if (getType()->isVoidType())
1880 R1 = getSourceRange();
1882 case ParenExprClass:
1883 return cast<ParenExpr>(this)->getSubExpr()->
1884 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
1885 case GenericSelectionExprClass:
1886 return cast<GenericSelectionExpr>(this)->getResultExpr()->
1887 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
1888 case UnaryOperatorClass: {
1889 const UnaryOperator *UO = cast<UnaryOperator>(this);
1891 switch (UO->getOpcode()) {
1902 case UO_PreDec: // ++/--
1903 return false; // Not a warning.
1906 // accessing a piece of a volatile complex is a side-effect.
1907 if (Ctx.getCanonicalType(UO->getSubExpr()->getType())
1908 .isVolatileQualified())
1912 return UO->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
1915 Loc = UO->getOperatorLoc();
1916 R1 = UO->getSubExpr()->getSourceRange();
1919 case BinaryOperatorClass: {
1920 const BinaryOperator *BO = cast<BinaryOperator>(this);
1921 switch (BO->getOpcode()) {
1924 // Consider the RHS of comma for side effects. LHS was checked by
1925 // Sema::CheckCommaOperands.
1927 // ((foo = <blah>), 0) is an idiom for hiding the result (and
1928 // lvalue-ness) of an assignment written in a macro.
1929 if (IntegerLiteral *IE =
1930 dyn_cast<IntegerLiteral>(BO->getRHS()->IgnoreParens()))
1931 if (IE->getValue() == 0)
1933 return BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
1934 // Consider '||', '&&' to have side effects if the LHS or RHS does.
1937 if (!BO->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) ||
1938 !BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
1942 if (BO->isAssignmentOp())
1945 Loc = BO->getOperatorLoc();
1946 R1 = BO->getLHS()->getSourceRange();
1947 R2 = BO->getRHS()->getSourceRange();
1950 case CompoundAssignOperatorClass:
1951 case VAArgExprClass:
1952 case AtomicExprClass:
1955 case ConditionalOperatorClass: {
1956 // If only one of the LHS or RHS is a warning, the operator might
1957 // be being used for control flow. Only warn if both the LHS and
1958 // RHS are warnings.
1959 const ConditionalOperator *Exp = cast<ConditionalOperator>(this);
1960 if (!Exp->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
1964 return Exp->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
1967 case MemberExprClass:
1969 Loc = cast<MemberExpr>(this)->getMemberLoc();
1970 R1 = SourceRange(Loc, Loc);
1971 R2 = cast<MemberExpr>(this)->getBase()->getSourceRange();
1974 case ArraySubscriptExprClass:
1976 Loc = cast<ArraySubscriptExpr>(this)->getRBracketLoc();
1977 R1 = cast<ArraySubscriptExpr>(this)->getLHS()->getSourceRange();
1978 R2 = cast<ArraySubscriptExpr>(this)->getRHS()->getSourceRange();
1981 case CXXOperatorCallExprClass: {
1982 // We warn about operator== and operator!= even when user-defined operator
1983 // overloads as there is no reasonable way to define these such that they
1984 // have non-trivial, desirable side-effects. See the -Wunused-comparison
1985 // warning: these operators are commonly typo'ed, and so warning on them
1986 // provides additional value as well. If this list is updated,
1987 // DiagnoseUnusedComparison should be as well.
1988 const CXXOperatorCallExpr *Op = cast<CXXOperatorCallExpr>(this);
1989 if (Op->getOperator() == OO_EqualEqual ||
1990 Op->getOperator() == OO_ExclaimEqual) {
1992 Loc = Op->getOperatorLoc();
1993 R1 = Op->getSourceRange();
1997 // Fallthrough for generic call handling.
2000 case CXXMemberCallExprClass:
2001 case UserDefinedLiteralClass: {
2002 // If this is a direct call, get the callee.
2003 const CallExpr *CE = cast<CallExpr>(this);
2004 if (const Decl *FD = CE->getCalleeDecl()) {
2005 // If the callee has attribute pure, const, or warn_unused_result, warn
2006 // about it. void foo() { strlen("bar"); } should warn.
2008 // Note: If new cases are added here, DiagnoseUnusedExprResult should be
2009 // updated to match for QoI.
2010 if (FD->getAttr<WarnUnusedResultAttr>() ||
2011 FD->getAttr<PureAttr>() || FD->getAttr<ConstAttr>()) {
2013 Loc = CE->getCallee()->getLocStart();
2014 R1 = CE->getCallee()->getSourceRange();
2016 if (unsigned NumArgs = CE->getNumArgs())
2017 R2 = SourceRange(CE->getArg(0)->getLocStart(),
2018 CE->getArg(NumArgs-1)->getLocEnd());
2025 // If we don't know precisely what we're looking at, let's not warn.
2026 case UnresolvedLookupExprClass:
2027 case CXXUnresolvedConstructExprClass:
2030 case CXXTemporaryObjectExprClass:
2031 case CXXConstructExprClass:
2034 case ObjCMessageExprClass: {
2035 const ObjCMessageExpr *ME = cast<ObjCMessageExpr>(this);
2036 if (Ctx.getLangOpts().ObjCAutoRefCount &&
2037 ME->isInstanceMessage() &&
2038 !ME->getType()->isVoidType() &&
2039 ME->getSelector().getIdentifierInfoForSlot(0) &&
2040 ME->getSelector().getIdentifierInfoForSlot(0)
2041 ->getName().startswith("init")) {
2044 R1 = ME->getSourceRange();
2048 const ObjCMethodDecl *MD = ME->getMethodDecl();
2049 if (MD && MD->getAttr<WarnUnusedResultAttr>()) {
2057 case ObjCPropertyRefExprClass:
2060 R1 = getSourceRange();
2063 case PseudoObjectExprClass: {
2064 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
2066 // Only complain about things that have the form of a getter.
2067 if (isa<UnaryOperator>(PO->getSyntacticForm()) ||
2068 isa<BinaryOperator>(PO->getSyntacticForm()))
2073 R1 = getSourceRange();
2077 case StmtExprClass: {
2078 // Statement exprs don't logically have side effects themselves, but are
2079 // sometimes used in macros in ways that give them a type that is unused.
2080 // For example ({ blah; foo(); }) will end up with a type if foo has a type.
2081 // however, if the result of the stmt expr is dead, we don't want to emit a
2083 const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt();
2084 if (!CS->body_empty()) {
2085 if (const Expr *E = dyn_cast<Expr>(CS->body_back()))
2086 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2087 if (const LabelStmt *Label = dyn_cast<LabelStmt>(CS->body_back()))
2088 if (const Expr *E = dyn_cast<Expr>(Label->getSubStmt()))
2089 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2092 if (getType()->isVoidType())
2095 Loc = cast<StmtExpr>(this)->getLParenLoc();
2096 R1 = getSourceRange();
2099 case CXXFunctionalCastExprClass:
2100 case CStyleCastExprClass: {
2101 // Ignore an explicit cast to void unless the operand is a non-trivial
2103 const CastExpr *CE = cast<CastExpr>(this);
2104 if (CE->getCastKind() == CK_ToVoid) {
2105 if (CE->getSubExpr()->isGLValue() &&
2106 CE->getSubExpr()->getType().isVolatileQualified()) {
2107 const DeclRefExpr *DRE =
2108 dyn_cast<DeclRefExpr>(CE->getSubExpr()->IgnoreParens());
2109 if (!(DRE && isa<VarDecl>(DRE->getDecl()) &&
2110 cast<VarDecl>(DRE->getDecl())->hasLocalStorage())) {
2111 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc,
2118 // Ignore casts within macro expansions.
2119 if (getExprLoc().isMacroID())
2120 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2122 // If this is a cast to a constructor conversion, check the operand.
2123 // Otherwise, the result of the cast is unused.
2124 if (CE->getCastKind() == CK_ConstructorConversion)
2125 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2128 if (const CXXFunctionalCastExpr *CXXCE =
2129 dyn_cast<CXXFunctionalCastExpr>(this)) {
2130 Loc = CXXCE->getTypeBeginLoc();
2131 R1 = CXXCE->getSubExpr()->getSourceRange();
2133 const CStyleCastExpr *CStyleCE = cast<CStyleCastExpr>(this);
2134 Loc = CStyleCE->getLParenLoc();
2135 R1 = CStyleCE->getSubExpr()->getSourceRange();
2139 case ImplicitCastExprClass: {
2140 const CastExpr *ICE = cast<ImplicitCastExpr>(this);
2142 // lvalue-to-rvalue conversion on a volatile lvalue is a side-effect.
2143 if (ICE->getCastKind() == CK_LValueToRValue &&
2144 ICE->getSubExpr()->getType().isVolatileQualified())
2147 return ICE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2149 case CXXDefaultArgExprClass:
2150 return (cast<CXXDefaultArgExpr>(this)
2151 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2153 case CXXNewExprClass:
2154 // FIXME: In theory, there might be new expressions that don't have side
2155 // effects (e.g. a placement new with an uninitialized POD).
2156 case CXXDeleteExprClass:
2158 case CXXBindTemporaryExprClass:
2159 return (cast<CXXBindTemporaryExpr>(this)
2160 ->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2161 case ExprWithCleanupsClass:
2162 return (cast<ExprWithCleanups>(this)
2163 ->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2167 /// isOBJCGCCandidate - Check if an expression is objc gc'able.
2168 /// returns true, if it is; false otherwise.
2169 bool Expr::isOBJCGCCandidate(ASTContext &Ctx) const {
2170 const Expr *E = IgnoreParens();
2171 switch (E->getStmtClass()) {
2174 case ObjCIvarRefExprClass:
2176 case Expr::UnaryOperatorClass:
2177 return cast<UnaryOperator>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2178 case ImplicitCastExprClass:
2179 return cast<ImplicitCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2180 case MaterializeTemporaryExprClass:
2181 return cast<MaterializeTemporaryExpr>(E)->GetTemporaryExpr()
2182 ->isOBJCGCCandidate(Ctx);
2183 case CStyleCastExprClass:
2184 return cast<CStyleCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2185 case DeclRefExprClass: {
2186 const Decl *D = cast<DeclRefExpr>(E)->getDecl();
2188 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
2189 if (VD->hasGlobalStorage())
2191 QualType T = VD->getType();
2192 // dereferencing to a pointer is always a gc'able candidate,
2193 // unless it is __weak.
2194 return T->isPointerType() &&
2195 (Ctx.getObjCGCAttrKind(T) != Qualifiers::Weak);
2199 case MemberExprClass: {
2200 const MemberExpr *M = cast<MemberExpr>(E);
2201 return M->getBase()->isOBJCGCCandidate(Ctx);
2203 case ArraySubscriptExprClass:
2204 return cast<ArraySubscriptExpr>(E)->getBase()->isOBJCGCCandidate(Ctx);
2208 bool Expr::isBoundMemberFunction(ASTContext &Ctx) const {
2209 if (isTypeDependent())
2211 return ClassifyLValue(Ctx) == Expr::LV_MemberFunction;
2214 QualType Expr::findBoundMemberType(const Expr *expr) {
2215 assert(expr->hasPlaceholderType(BuiltinType::BoundMember));
2217 // Bound member expressions are always one of these possibilities:
2218 // x->m x.m x->*y x.*y
2219 // (possibly parenthesized)
2221 expr = expr->IgnoreParens();
2222 if (const MemberExpr *mem = dyn_cast<MemberExpr>(expr)) {
2223 assert(isa<CXXMethodDecl>(mem->getMemberDecl()));
2224 return mem->getMemberDecl()->getType();
2227 if (const BinaryOperator *op = dyn_cast<BinaryOperator>(expr)) {
2228 QualType type = op->getRHS()->getType()->castAs<MemberPointerType>()
2230 assert(type->isFunctionType());
2234 assert(isa<UnresolvedMemberExpr>(expr));
2238 Expr* Expr::IgnoreParens() {
2241 if (ParenExpr* P = dyn_cast<ParenExpr>(E)) {
2242 E = P->getSubExpr();
2245 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) {
2246 if (P->getOpcode() == UO_Extension) {
2247 E = P->getSubExpr();
2251 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) {
2252 if (!P->isResultDependent()) {
2253 E = P->getResultExpr();
2261 /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr
2262 /// or CastExprs or ImplicitCastExprs, returning their operand.
2263 Expr *Expr::IgnoreParenCasts() {
2266 if (ParenExpr* P = dyn_cast<ParenExpr>(E)) {
2267 E = P->getSubExpr();
2270 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2271 E = P->getSubExpr();
2274 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) {
2275 if (P->getOpcode() == UO_Extension) {
2276 E = P->getSubExpr();
2280 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) {
2281 if (!P->isResultDependent()) {
2282 E = P->getResultExpr();
2286 if (MaterializeTemporaryExpr *Materialize
2287 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2288 E = Materialize->GetTemporaryExpr();
2291 if (SubstNonTypeTemplateParmExpr *NTTP
2292 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2293 E = NTTP->getReplacement();
2300 /// IgnoreParenLValueCasts - Ignore parentheses and lvalue-to-rvalue
2301 /// casts. This is intended purely as a temporary workaround for code
2302 /// that hasn't yet been rewritten to do the right thing about those
2303 /// casts, and may disappear along with the last internal use.
2304 Expr *Expr::IgnoreParenLValueCasts() {
2307 if (ParenExpr *P = dyn_cast<ParenExpr>(E)) {
2308 E = P->getSubExpr();
2310 } else if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2311 if (P->getCastKind() == CK_LValueToRValue) {
2312 E = P->getSubExpr();
2315 } else if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) {
2316 if (P->getOpcode() == UO_Extension) {
2317 E = P->getSubExpr();
2320 } else if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) {
2321 if (!P->isResultDependent()) {
2322 E = P->getResultExpr();
2325 } else if (MaterializeTemporaryExpr *Materialize
2326 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2327 E = Materialize->GetTemporaryExpr();
2329 } else if (SubstNonTypeTemplateParmExpr *NTTP
2330 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2331 E = NTTP->getReplacement();
2339 Expr *Expr::ignoreParenBaseCasts() {
2342 if (ParenExpr *P = dyn_cast<ParenExpr>(E)) {
2343 E = P->getSubExpr();
2346 if (CastExpr *CE = dyn_cast<CastExpr>(E)) {
2347 if (CE->getCastKind() == CK_DerivedToBase ||
2348 CE->getCastKind() == CK_UncheckedDerivedToBase ||
2349 CE->getCastKind() == CK_NoOp) {
2350 E = CE->getSubExpr();
2359 Expr *Expr::IgnoreParenImpCasts() {
2362 if (ParenExpr *P = dyn_cast<ParenExpr>(E)) {
2363 E = P->getSubExpr();
2366 if (ImplicitCastExpr *P = dyn_cast<ImplicitCastExpr>(E)) {
2367 E = P->getSubExpr();
2370 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) {
2371 if (P->getOpcode() == UO_Extension) {
2372 E = P->getSubExpr();
2376 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) {
2377 if (!P->isResultDependent()) {
2378 E = P->getResultExpr();
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 Expr *Expr::IgnoreConversionOperator() {
2397 if (CXXMemberCallExpr *MCE = dyn_cast<CXXMemberCallExpr>(this)) {
2398 if (MCE->getMethodDecl() && isa<CXXConversionDecl>(MCE->getMethodDecl()))
2399 return MCE->getImplicitObjectArgument();
2404 /// IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the
2405 /// value (including ptr->int casts of the same size). Strip off any
2406 /// ParenExpr or CastExprs, returning their operand.
2407 Expr *Expr::IgnoreParenNoopCasts(ASTContext &Ctx) {
2410 if (ParenExpr *P = dyn_cast<ParenExpr>(E)) {
2411 E = P->getSubExpr();
2415 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2416 // We ignore integer <-> casts that are of the same width, ptr<->ptr and
2417 // ptr<->int casts of the same width. We also ignore all identity casts.
2418 Expr *SE = P->getSubExpr();
2420 if (Ctx.hasSameUnqualifiedType(E->getType(), SE->getType())) {
2425 if ((E->getType()->isPointerType() ||
2426 E->getType()->isIntegralType(Ctx)) &&
2427 (SE->getType()->isPointerType() ||
2428 SE->getType()->isIntegralType(Ctx)) &&
2429 Ctx.getTypeSize(E->getType()) == Ctx.getTypeSize(SE->getType())) {
2435 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) {
2436 if (P->getOpcode() == UO_Extension) {
2437 E = P->getSubExpr();
2442 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) {
2443 if (!P->isResultDependent()) {
2444 E = P->getResultExpr();
2449 if (SubstNonTypeTemplateParmExpr *NTTP
2450 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2451 E = NTTP->getReplacement();
2459 bool Expr::isDefaultArgument() const {
2460 const Expr *E = this;
2461 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2462 E = M->GetTemporaryExpr();
2464 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E))
2465 E = ICE->getSubExprAsWritten();
2467 return isa<CXXDefaultArgExpr>(E);
2470 /// \brief Skip over any no-op casts and any temporary-binding
2472 static const Expr *skipTemporaryBindingsNoOpCastsAndParens(const Expr *E) {
2473 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2474 E = M->GetTemporaryExpr();
2476 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2477 if (ICE->getCastKind() == CK_NoOp)
2478 E = ICE->getSubExpr();
2483 while (const CXXBindTemporaryExpr *BE = dyn_cast<CXXBindTemporaryExpr>(E))
2484 E = BE->getSubExpr();
2486 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2487 if (ICE->getCastKind() == CK_NoOp)
2488 E = ICE->getSubExpr();
2493 return E->IgnoreParens();
2496 /// isTemporaryObject - Determines if this expression produces a
2497 /// temporary of the given class type.
2498 bool Expr::isTemporaryObject(ASTContext &C, const CXXRecordDecl *TempTy) const {
2499 if (!C.hasSameUnqualifiedType(getType(), C.getTypeDeclType(TempTy)))
2502 const Expr *E = skipTemporaryBindingsNoOpCastsAndParens(this);
2504 // Temporaries are by definition pr-values of class type.
2505 if (!E->Classify(C).isPRValue()) {
2506 // In this context, property reference is a message call and is pr-value.
2507 if (!isa<ObjCPropertyRefExpr>(E))
2511 // Black-list a few cases which yield pr-values of class type that don't
2512 // refer to temporaries of that type:
2514 // - implicit derived-to-base conversions
2515 if (isa<ImplicitCastExpr>(E)) {
2516 switch (cast<ImplicitCastExpr>(E)->getCastKind()) {
2517 case CK_DerivedToBase:
2518 case CK_UncheckedDerivedToBase:
2525 // - member expressions (all)
2526 if (isa<MemberExpr>(E))
2529 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E))
2530 if (BO->isPtrMemOp())
2533 // - opaque values (all)
2534 if (isa<OpaqueValueExpr>(E))
2540 bool Expr::isImplicitCXXThis() const {
2541 const Expr *E = this;
2543 // Strip away parentheses and casts we don't care about.
2545 if (const ParenExpr *Paren = dyn_cast<ParenExpr>(E)) {
2546 E = Paren->getSubExpr();
2550 if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2551 if (ICE->getCastKind() == CK_NoOp ||
2552 ICE->getCastKind() == CK_LValueToRValue ||
2553 ICE->getCastKind() == CK_DerivedToBase ||
2554 ICE->getCastKind() == CK_UncheckedDerivedToBase) {
2555 E = ICE->getSubExpr();
2560 if (const UnaryOperator* UnOp = dyn_cast<UnaryOperator>(E)) {
2561 if (UnOp->getOpcode() == UO_Extension) {
2562 E = UnOp->getSubExpr();
2567 if (const MaterializeTemporaryExpr *M
2568 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2569 E = M->GetTemporaryExpr();
2576 if (const CXXThisExpr *This = dyn_cast<CXXThisExpr>(E))
2577 return This->isImplicit();
2582 /// hasAnyTypeDependentArguments - Determines if any of the expressions
2583 /// in Exprs is type-dependent.
2584 bool Expr::hasAnyTypeDependentArguments(llvm::ArrayRef<Expr *> Exprs) {
2585 for (unsigned I = 0; I < Exprs.size(); ++I)
2586 if (Exprs[I]->isTypeDependent())
2592 bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef) const {
2593 // This function is attempting whether an expression is an initializer
2594 // which can be evaluated at compile-time. isEvaluatable handles most
2595 // of the cases, but it can't deal with some initializer-specific
2596 // expressions, and it can't deal with aggregates; we deal with those here,
2597 // and fall back to isEvaluatable for the other cases.
2599 // If we ever capture reference-binding directly in the AST, we can
2600 // kill the second parameter.
2604 return EvaluateAsLValue(Result, Ctx) && !Result.HasSideEffects;
2607 switch (getStmtClass()) {
2609 case IntegerLiteralClass:
2610 case FloatingLiteralClass:
2611 case StringLiteralClass:
2612 case ObjCStringLiteralClass:
2613 case ObjCEncodeExprClass:
2615 case CXXTemporaryObjectExprClass:
2616 case CXXConstructExprClass: {
2617 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
2620 if (CE->getConstructor()->isTrivial()) {
2621 // 1) an application of the trivial default constructor or
2622 if (!CE->getNumArgs()) return true;
2624 // 2) an elidable trivial copy construction of an operand which is
2625 // itself a constant initializer. Note that we consider the
2626 // operand on its own, *not* as a reference binding.
2627 if (CE->isElidable() &&
2628 CE->getArg(0)->isConstantInitializer(Ctx, false))
2632 // 3) a foldable constexpr constructor.
2635 case CompoundLiteralExprClass: {
2636 // This handles gcc's extension that allows global initializers like
2637 // "struct x {int x;} x = (struct x) {};".
2638 // FIXME: This accepts other cases it shouldn't!
2639 const Expr *Exp = cast<CompoundLiteralExpr>(this)->getInitializer();
2640 return Exp->isConstantInitializer(Ctx, false);
2642 case InitListExprClass: {
2643 // FIXME: This doesn't deal with fields with reference types correctly.
2644 // FIXME: This incorrectly allows pointers cast to integers to be assigned
2646 const InitListExpr *Exp = cast<InitListExpr>(this);
2647 unsigned numInits = Exp->getNumInits();
2648 for (unsigned i = 0; i < numInits; i++) {
2649 if (!Exp->getInit(i)->isConstantInitializer(Ctx, false))
2654 case ImplicitValueInitExprClass:
2656 case ParenExprClass:
2657 return cast<ParenExpr>(this)->getSubExpr()
2658 ->isConstantInitializer(Ctx, IsForRef);
2659 case GenericSelectionExprClass:
2660 if (cast<GenericSelectionExpr>(this)->isResultDependent())
2662 return cast<GenericSelectionExpr>(this)->getResultExpr()
2663 ->isConstantInitializer(Ctx, IsForRef);
2664 case ChooseExprClass:
2665 return cast<ChooseExpr>(this)->getChosenSubExpr(Ctx)
2666 ->isConstantInitializer(Ctx, IsForRef);
2667 case UnaryOperatorClass: {
2668 const UnaryOperator* Exp = cast<UnaryOperator>(this);
2669 if (Exp->getOpcode() == UO_Extension)
2670 return Exp->getSubExpr()->isConstantInitializer(Ctx, false);
2673 case CXXFunctionalCastExprClass:
2674 case CXXStaticCastExprClass:
2675 case ImplicitCastExprClass:
2676 case CStyleCastExprClass: {
2677 const CastExpr *CE = cast<CastExpr>(this);
2679 // If we're promoting an integer to an _Atomic type then this is constant
2680 // if the integer is constant. We also need to check the converse in case
2681 // someone does something like:
2683 // int a = (_Atomic(int))42;
2685 // I doubt anyone would write code like this directly, but it's quite
2686 // possible as the result of macro expansions.
2687 if (CE->getCastKind() == CK_NonAtomicToAtomic ||
2688 CE->getCastKind() == CK_AtomicToNonAtomic)
2689 return CE->getSubExpr()->isConstantInitializer(Ctx, false);
2691 // Handle bitcasts of vector constants.
2692 if (getType()->isVectorType() && CE->getCastKind() == CK_BitCast)
2693 return CE->getSubExpr()->isConstantInitializer(Ctx, false);
2695 // Handle misc casts we want to ignore.
2696 // FIXME: Is it really safe to ignore all these?
2697 if (CE->getCastKind() == CK_NoOp ||
2698 CE->getCastKind() == CK_LValueToRValue ||
2699 CE->getCastKind() == CK_ToUnion ||
2700 CE->getCastKind() == CK_ConstructorConversion)
2701 return CE->getSubExpr()->isConstantInitializer(Ctx, false);
2705 case MaterializeTemporaryExprClass:
2706 return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
2707 ->isConstantInitializer(Ctx, false);
2709 return isEvaluatable(Ctx);
2712 bool Expr::HasSideEffects(const ASTContext &Ctx) const {
2713 if (isInstantiationDependent())
2716 switch (getStmtClass()) {
2718 #define ABSTRACT_STMT(Type)
2719 #define STMT(Type, Base) case Type##Class:
2720 #define EXPR(Type, Base)
2721 #include "clang/AST/StmtNodes.inc"
2722 llvm_unreachable("unexpected Expr kind");
2724 case DependentScopeDeclRefExprClass:
2725 case CXXUnresolvedConstructExprClass:
2726 case CXXDependentScopeMemberExprClass:
2727 case UnresolvedLookupExprClass:
2728 case UnresolvedMemberExprClass:
2729 case PackExpansionExprClass:
2730 case SubstNonTypeTemplateParmPackExprClass:
2731 case FunctionParmPackExprClass:
2732 llvm_unreachable("shouldn't see dependent / unresolved nodes here");
2734 case DeclRefExprClass:
2735 case ObjCIvarRefExprClass:
2736 case PredefinedExprClass:
2737 case IntegerLiteralClass:
2738 case FloatingLiteralClass:
2739 case ImaginaryLiteralClass:
2740 case StringLiteralClass:
2741 case CharacterLiteralClass:
2742 case OffsetOfExprClass:
2743 case ImplicitValueInitExprClass:
2744 case UnaryExprOrTypeTraitExprClass:
2745 case AddrLabelExprClass:
2746 case GNUNullExprClass:
2747 case CXXBoolLiteralExprClass:
2748 case CXXNullPtrLiteralExprClass:
2749 case CXXThisExprClass:
2750 case CXXScalarValueInitExprClass:
2751 case TypeTraitExprClass:
2752 case UnaryTypeTraitExprClass:
2753 case BinaryTypeTraitExprClass:
2754 case ArrayTypeTraitExprClass:
2755 case ExpressionTraitExprClass:
2756 case CXXNoexceptExprClass:
2757 case SizeOfPackExprClass:
2758 case ObjCStringLiteralClass:
2759 case ObjCEncodeExprClass:
2760 case ObjCBoolLiteralExprClass:
2761 case CXXUuidofExprClass:
2762 case OpaqueValueExprClass:
2763 // These never have a side-effect.
2767 case CompoundAssignOperatorClass:
2768 case VAArgExprClass:
2769 case AtomicExprClass:
2771 case CXXOperatorCallExprClass:
2772 case CXXMemberCallExprClass:
2773 case UserDefinedLiteralClass:
2774 case CXXThrowExprClass:
2775 case CXXNewExprClass:
2776 case CXXDeleteExprClass:
2777 case ExprWithCleanupsClass:
2778 case CXXBindTemporaryExprClass:
2779 case BlockExprClass:
2780 case CUDAKernelCallExprClass:
2781 // These always have a side-effect.
2784 case ParenExprClass:
2785 case ArraySubscriptExprClass:
2786 case MemberExprClass:
2787 case ConditionalOperatorClass:
2788 case BinaryConditionalOperatorClass:
2789 case CompoundLiteralExprClass:
2790 case ExtVectorElementExprClass:
2791 case DesignatedInitExprClass:
2792 case ParenListExprClass:
2793 case CXXPseudoDestructorExprClass:
2794 case SubstNonTypeTemplateParmExprClass:
2795 case MaterializeTemporaryExprClass:
2796 case ShuffleVectorExprClass:
2797 case AsTypeExprClass:
2798 // These have a side-effect if any subexpression does.
2801 case UnaryOperatorClass:
2802 if (cast<UnaryOperator>(this)->isIncrementDecrementOp())
2806 case BinaryOperatorClass:
2807 if (cast<BinaryOperator>(this)->isAssignmentOp())
2811 case InitListExprClass:
2812 // FIXME: The children for an InitListExpr doesn't include the array filler.
2813 if (const Expr *E = cast<InitListExpr>(this)->getArrayFiller())
2814 if (E->HasSideEffects(Ctx))
2818 case GenericSelectionExprClass:
2819 return cast<GenericSelectionExpr>(this)->getResultExpr()->
2820 HasSideEffects(Ctx);
2822 case ChooseExprClass:
2823 return cast<ChooseExpr>(this)->getChosenSubExpr(Ctx)->HasSideEffects(Ctx);
2825 case CXXDefaultArgExprClass:
2826 return cast<CXXDefaultArgExpr>(this)->getExpr()->HasSideEffects(Ctx);
2828 case CXXDynamicCastExprClass: {
2829 // A dynamic_cast expression has side-effects if it can throw.
2830 const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(this);
2831 if (DCE->getTypeAsWritten()->isReferenceType() &&
2832 DCE->getCastKind() == CK_Dynamic)
2835 case ImplicitCastExprClass:
2836 case CStyleCastExprClass:
2837 case CXXStaticCastExprClass:
2838 case CXXReinterpretCastExprClass:
2839 case CXXConstCastExprClass:
2840 case CXXFunctionalCastExprClass: {
2841 const CastExpr *CE = cast<CastExpr>(this);
2842 if (CE->getCastKind() == CK_LValueToRValue &&
2843 CE->getSubExpr()->getType().isVolatileQualified())
2848 case CXXTypeidExprClass:
2849 // typeid might throw if its subexpression is potentially-evaluated, so has
2850 // side-effects in that case whether or not its subexpression does.
2851 return cast<CXXTypeidExpr>(this)->isPotentiallyEvaluated();
2853 case CXXConstructExprClass:
2854 case CXXTemporaryObjectExprClass: {
2855 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
2856 if (!CE->getConstructor()->isTrivial())
2858 // A trivial constructor does not add any side-effects of its own. Just look
2859 // at its arguments.
2863 case LambdaExprClass: {
2864 const LambdaExpr *LE = cast<LambdaExpr>(this);
2865 for (LambdaExpr::capture_iterator I = LE->capture_begin(),
2866 E = LE->capture_end(); I != E; ++I)
2867 if (I->getCaptureKind() == LCK_ByCopy)
2868 // FIXME: Only has a side-effect if the variable is volatile or if
2869 // the copy would invoke a non-trivial copy constructor.
2874 case PseudoObjectExprClass: {
2875 // Only look for side-effects in the semantic form, and look past
2876 // OpaqueValueExpr bindings in that form.
2877 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
2878 for (PseudoObjectExpr::const_semantics_iterator I = PO->semantics_begin(),
2879 E = PO->semantics_end();
2881 const Expr *Subexpr = *I;
2882 if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(Subexpr))
2883 Subexpr = OVE->getSourceExpr();
2884 if (Subexpr->HasSideEffects(Ctx))
2890 case ObjCBoxedExprClass:
2891 case ObjCArrayLiteralClass:
2892 case ObjCDictionaryLiteralClass:
2893 case ObjCMessageExprClass:
2894 case ObjCSelectorExprClass:
2895 case ObjCProtocolExprClass:
2896 case ObjCPropertyRefExprClass:
2897 case ObjCIsaExprClass:
2898 case ObjCIndirectCopyRestoreExprClass:
2899 case ObjCSubscriptRefExprClass:
2900 case ObjCBridgedCastExprClass:
2901 // FIXME: Classify these cases better.
2905 // Recurse to children.
2906 for (const_child_range SubStmts = children(); SubStmts; ++SubStmts)
2907 if (const Stmt *S = *SubStmts)
2908 if (cast<Expr>(S)->HasSideEffects(Ctx))
2915 /// \brief Look for a call to a non-trivial function within an expression.
2916 class NonTrivialCallFinder : public EvaluatedExprVisitor<NonTrivialCallFinder>
2918 typedef EvaluatedExprVisitor<NonTrivialCallFinder> Inherited;
2923 explicit NonTrivialCallFinder(ASTContext &Context)
2924 : Inherited(Context), NonTrivial(false) { }
2926 bool hasNonTrivialCall() const { return NonTrivial; }
2928 void VisitCallExpr(CallExpr *E) {
2929 if (CXXMethodDecl *Method
2930 = dyn_cast_or_null<CXXMethodDecl>(E->getCalleeDecl())) {
2931 if (Method->isTrivial()) {
2932 // Recurse to children of the call.
2933 Inherited::VisitStmt(E);
2941 void VisitCXXConstructExpr(CXXConstructExpr *E) {
2942 if (E->getConstructor()->isTrivial()) {
2943 // Recurse to children of the call.
2944 Inherited::VisitStmt(E);
2951 void VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) {
2952 if (E->getTemporary()->getDestructor()->isTrivial()) {
2953 Inherited::VisitStmt(E);
2962 bool Expr::hasNonTrivialCall(ASTContext &Ctx) {
2963 NonTrivialCallFinder Finder(Ctx);
2965 return Finder.hasNonTrivialCall();
2968 /// isNullPointerConstant - C99 6.3.2.3p3 - Return whether this is a null
2969 /// pointer constant or not, as well as the specific kind of constant detected.
2970 /// Null pointer constants can be integer constant expressions with the
2971 /// value zero, casts of zero to void*, nullptr (C++0X), or __null
2972 /// (a GNU extension).
2973 Expr::NullPointerConstantKind
2974 Expr::isNullPointerConstant(ASTContext &Ctx,
2975 NullPointerConstantValueDependence NPC) const {
2976 if (isValueDependent()) {
2978 case NPC_NeverValueDependent:
2979 llvm_unreachable("Unexpected value dependent expression!");
2980 case NPC_ValueDependentIsNull:
2981 if (isTypeDependent() || getType()->isIntegralType(Ctx))
2982 return NPCK_ZeroExpression;
2984 return NPCK_NotNull;
2986 case NPC_ValueDependentIsNotNull:
2987 return NPCK_NotNull;
2991 // Strip off a cast to void*, if it exists. Except in C++.
2992 if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) {
2993 if (!Ctx.getLangOpts().CPlusPlus) {
2994 // Check that it is a cast to void*.
2995 if (const PointerType *PT = CE->getType()->getAs<PointerType>()) {
2996 QualType Pointee = PT->getPointeeType();
2997 if (!Pointee.hasQualifiers() &&
2998 Pointee->isVoidType() && // to void*
2999 CE->getSubExpr()->getType()->isIntegerType()) // from int.
3000 return CE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3003 } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) {
3004 // Ignore the ImplicitCastExpr type entirely.
3005 return ICE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3006 } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) {
3007 // Accept ((void*)0) as a null pointer constant, as many other
3008 // implementations do.
3009 return PE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3010 } else if (const GenericSelectionExpr *GE =
3011 dyn_cast<GenericSelectionExpr>(this)) {
3012 return GE->getResultExpr()->isNullPointerConstant(Ctx, NPC);
3013 } else if (const CXXDefaultArgExpr *DefaultArg
3014 = dyn_cast<CXXDefaultArgExpr>(this)) {
3015 // See through default argument expressions
3016 return DefaultArg->getExpr()->isNullPointerConstant(Ctx, NPC);
3017 } else if (isa<GNUNullExpr>(this)) {
3018 // The GNU __null extension is always a null pointer constant.
3019 return NPCK_GNUNull;
3020 } else if (const MaterializeTemporaryExpr *M
3021 = dyn_cast<MaterializeTemporaryExpr>(this)) {
3022 return M->GetTemporaryExpr()->isNullPointerConstant(Ctx, NPC);
3023 } else if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(this)) {
3024 if (const Expr *Source = OVE->getSourceExpr())
3025 return Source->isNullPointerConstant(Ctx, NPC);
3028 // C++0x nullptr_t is always a null pointer constant.
3029 if (getType()->isNullPtrType())
3030 return NPCK_CXX0X_nullptr;
3032 if (const RecordType *UT = getType()->getAsUnionType())
3033 if (UT && UT->getDecl()->hasAttr<TransparentUnionAttr>())
3034 if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(this)){
3035 const Expr *InitExpr = CLE->getInitializer();
3036 if (const InitListExpr *ILE = dyn_cast<InitListExpr>(InitExpr))
3037 return ILE->getInit(0)->isNullPointerConstant(Ctx, NPC);
3039 // This expression must be an integer type.
3040 if (!getType()->isIntegerType() ||
3041 (Ctx.getLangOpts().CPlusPlus && getType()->isEnumeralType()))
3042 return NPCK_NotNull;
3044 // If we have an integer constant expression, we need to *evaluate* it and
3045 // test for the value 0. Don't use the C++11 constant expression semantics
3046 // for this, for now; once the dust settles on core issue 903, we might only
3047 // allow a literal 0 here in C++11 mode.
3048 if (Ctx.getLangOpts().CPlusPlus0x) {
3049 if (!isCXX98IntegralConstantExpr(Ctx))
3050 return NPCK_NotNull;
3052 if (!isIntegerConstantExpr(Ctx))
3053 return NPCK_NotNull;
3056 if (EvaluateKnownConstInt(Ctx) != 0)
3057 return NPCK_NotNull;
3059 if (isa<IntegerLiteral>(this))
3060 return NPCK_ZeroLiteral;
3061 return NPCK_ZeroExpression;
3064 /// \brief If this expression is an l-value for an Objective C
3065 /// property, find the underlying property reference expression.
3066 const ObjCPropertyRefExpr *Expr::getObjCProperty() const {
3067 const Expr *E = this;
3069 assert((E->getValueKind() == VK_LValue &&
3070 E->getObjectKind() == OK_ObjCProperty) &&
3071 "expression is not a property reference");
3072 E = E->IgnoreParenCasts();
3073 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
3074 if (BO->getOpcode() == BO_Comma) {
3083 return cast<ObjCPropertyRefExpr>(E);
3086 bool Expr::isObjCSelfExpr() const {
3087 const Expr *E = IgnoreParenImpCasts();
3089 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E);
3093 const ImplicitParamDecl *Param = dyn_cast<ImplicitParamDecl>(DRE->getDecl());
3097 const ObjCMethodDecl *M = dyn_cast<ObjCMethodDecl>(Param->getDeclContext());
3101 return M->getSelfDecl() == Param;
3104 FieldDecl *Expr::getBitField() {
3105 Expr *E = this->IgnoreParens();
3107 while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3108 if (ICE->getCastKind() == CK_LValueToRValue ||
3109 (ICE->getValueKind() != VK_RValue && ICE->getCastKind() == CK_NoOp))
3110 E = ICE->getSubExpr()->IgnoreParens();
3115 if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E))
3116 if (FieldDecl *Field = dyn_cast<FieldDecl>(MemRef->getMemberDecl()))
3117 if (Field->isBitField())
3120 if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E))
3121 if (FieldDecl *Field = dyn_cast<FieldDecl>(DeclRef->getDecl()))
3122 if (Field->isBitField())
3125 if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(E)) {
3126 if (BinOp->isAssignmentOp() && BinOp->getLHS())
3127 return BinOp->getLHS()->getBitField();
3129 if (BinOp->getOpcode() == BO_Comma && BinOp->getRHS())
3130 return BinOp->getRHS()->getBitField();
3136 bool Expr::refersToVectorElement() const {
3137 const Expr *E = this->IgnoreParens();
3139 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3140 if (ICE->getValueKind() != VK_RValue &&
3141 ICE->getCastKind() == CK_NoOp)
3142 E = ICE->getSubExpr()->IgnoreParens();
3147 if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E))
3148 return ASE->getBase()->getType()->isVectorType();
3150 if (isa<ExtVectorElementExpr>(E))
3156 /// isArrow - Return true if the base expression is a pointer to vector,
3157 /// return false if the base expression is a vector.
3158 bool ExtVectorElementExpr::isArrow() const {
3159 return getBase()->getType()->isPointerType();
3162 unsigned ExtVectorElementExpr::getNumElements() const {
3163 if (const VectorType *VT = getType()->getAs<VectorType>())
3164 return VT->getNumElements();
3168 /// containsDuplicateElements - Return true if any element access is repeated.
3169 bool ExtVectorElementExpr::containsDuplicateElements() const {
3170 // FIXME: Refactor this code to an accessor on the AST node which returns the
3171 // "type" of component access, and share with code below and in Sema.
3172 StringRef Comp = Accessor->getName();
3174 // Halving swizzles do not contain duplicate elements.
3175 if (Comp == "hi" || Comp == "lo" || Comp == "even" || Comp == "odd")
3178 // Advance past s-char prefix on hex swizzles.
3179 if (Comp[0] == 's' || Comp[0] == 'S')
3180 Comp = Comp.substr(1);
3182 for (unsigned i = 0, e = Comp.size(); i != e; ++i)
3183 if (Comp.substr(i + 1).find(Comp[i]) != StringRef::npos)
3189 /// getEncodedElementAccess - We encode the fields as a llvm ConstantArray.
3190 void ExtVectorElementExpr::getEncodedElementAccess(
3191 SmallVectorImpl<unsigned> &Elts) const {
3192 StringRef Comp = Accessor->getName();
3193 if (Comp[0] == 's' || Comp[0] == 'S')
3194 Comp = Comp.substr(1);
3196 bool isHi = Comp == "hi";
3197 bool isLo = Comp == "lo";
3198 bool isEven = Comp == "even";
3199 bool isOdd = Comp == "odd";
3201 for (unsigned i = 0, e = getNumElements(); i != e; ++i) {
3213 Index = ExtVectorType::getAccessorIdx(Comp[i]);
3215 Elts.push_back(Index);
3219 ObjCMessageExpr::ObjCMessageExpr(QualType T,
3221 SourceLocation LBracLoc,
3222 SourceLocation SuperLoc,
3223 bool IsInstanceSuper,
3226 ArrayRef<SourceLocation> SelLocs,
3227 SelectorLocationsKind SelLocsK,
3228 ObjCMethodDecl *Method,
3229 ArrayRef<Expr *> Args,
3230 SourceLocation RBracLoc,
3232 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary,
3233 /*TypeDependent=*/false, /*ValueDependent=*/false,
3234 /*InstantiationDependent=*/false,
3235 /*ContainsUnexpandedParameterPack=*/false),
3236 SelectorOrMethod(reinterpret_cast<uintptr_t>(Method? Method
3237 : Sel.getAsOpaquePtr())),
3238 Kind(IsInstanceSuper? SuperInstance : SuperClass),
3239 HasMethod(Method != 0), IsDelegateInitCall(false), IsImplicit(isImplicit),
3240 SuperLoc(SuperLoc), LBracLoc(LBracLoc), RBracLoc(RBracLoc)
3242 initArgsAndSelLocs(Args, SelLocs, SelLocsK);
3243 setReceiverPointer(SuperType.getAsOpaquePtr());
3246 ObjCMessageExpr::ObjCMessageExpr(QualType T,
3248 SourceLocation LBracLoc,
3249 TypeSourceInfo *Receiver,
3251 ArrayRef<SourceLocation> SelLocs,
3252 SelectorLocationsKind SelLocsK,
3253 ObjCMethodDecl *Method,
3254 ArrayRef<Expr *> Args,
3255 SourceLocation RBracLoc,
3257 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary, T->isDependentType(),
3258 T->isDependentType(), T->isInstantiationDependentType(),
3259 T->containsUnexpandedParameterPack()),
3260 SelectorOrMethod(reinterpret_cast<uintptr_t>(Method? Method
3261 : Sel.getAsOpaquePtr())),
3263 HasMethod(Method != 0), IsDelegateInitCall(false), IsImplicit(isImplicit),
3264 LBracLoc(LBracLoc), RBracLoc(RBracLoc)
3266 initArgsAndSelLocs(Args, SelLocs, SelLocsK);
3267 setReceiverPointer(Receiver);
3270 ObjCMessageExpr::ObjCMessageExpr(QualType T,
3272 SourceLocation LBracLoc,
3275 ArrayRef<SourceLocation> SelLocs,
3276 SelectorLocationsKind SelLocsK,
3277 ObjCMethodDecl *Method,
3278 ArrayRef<Expr *> Args,
3279 SourceLocation RBracLoc,
3281 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary, Receiver->isTypeDependent(),
3282 Receiver->isTypeDependent(),
3283 Receiver->isInstantiationDependent(),
3284 Receiver->containsUnexpandedParameterPack()),
3285 SelectorOrMethod(reinterpret_cast<uintptr_t>(Method? Method
3286 : Sel.getAsOpaquePtr())),
3288 HasMethod(Method != 0), IsDelegateInitCall(false), IsImplicit(isImplicit),
3289 LBracLoc(LBracLoc), RBracLoc(RBracLoc)
3291 initArgsAndSelLocs(Args, SelLocs, SelLocsK);
3292 setReceiverPointer(Receiver);
3295 void ObjCMessageExpr::initArgsAndSelLocs(ArrayRef<Expr *> Args,
3296 ArrayRef<SourceLocation> SelLocs,
3297 SelectorLocationsKind SelLocsK) {
3298 setNumArgs(Args.size());
3299 Expr **MyArgs = getArgs();
3300 for (unsigned I = 0; I != Args.size(); ++I) {
3301 if (Args[I]->isTypeDependent())
3302 ExprBits.TypeDependent = true;
3303 if (Args[I]->isValueDependent())
3304 ExprBits.ValueDependent = true;
3305 if (Args[I]->isInstantiationDependent())
3306 ExprBits.InstantiationDependent = true;
3307 if (Args[I]->containsUnexpandedParameterPack())
3308 ExprBits.ContainsUnexpandedParameterPack = true;
3310 MyArgs[I] = Args[I];
3313 SelLocsKind = SelLocsK;
3314 if (!isImplicit()) {
3315 if (SelLocsK == SelLoc_NonStandard)
3316 std::copy(SelLocs.begin(), SelLocs.end(), getStoredSelLocs());
3320 ObjCMessageExpr *ObjCMessageExpr::Create(ASTContext &Context, QualType T,
3322 SourceLocation LBracLoc,
3323 SourceLocation SuperLoc,
3324 bool IsInstanceSuper,
3327 ArrayRef<SourceLocation> SelLocs,
3328 ObjCMethodDecl *Method,
3329 ArrayRef<Expr *> Args,
3330 SourceLocation RBracLoc,
3332 assert((!SelLocs.empty() || isImplicit) &&
3333 "No selector locs for non-implicit message");
3334 ObjCMessageExpr *Mem;
3335 SelectorLocationsKind SelLocsK = SelectorLocationsKind();
3337 Mem = alloc(Context, Args.size(), 0);
3339 Mem = alloc(Context, Args, RBracLoc, SelLocs, Sel, SelLocsK);
3340 return new (Mem) ObjCMessageExpr(T, VK, LBracLoc, SuperLoc, IsInstanceSuper,
3341 SuperType, Sel, SelLocs, SelLocsK,
3342 Method, Args, RBracLoc, isImplicit);
3345 ObjCMessageExpr *ObjCMessageExpr::Create(ASTContext &Context, QualType T,
3347 SourceLocation LBracLoc,
3348 TypeSourceInfo *Receiver,
3350 ArrayRef<SourceLocation> SelLocs,
3351 ObjCMethodDecl *Method,
3352 ArrayRef<Expr *> Args,
3353 SourceLocation RBracLoc,
3355 assert((!SelLocs.empty() || isImplicit) &&
3356 "No selector locs for non-implicit message");
3357 ObjCMessageExpr *Mem;
3358 SelectorLocationsKind SelLocsK = SelectorLocationsKind();
3360 Mem = alloc(Context, Args.size(), 0);
3362 Mem = alloc(Context, Args, RBracLoc, SelLocs, Sel, SelLocsK);
3363 return new (Mem) ObjCMessageExpr(T, VK, LBracLoc, Receiver, Sel,
3364 SelLocs, SelLocsK, Method, Args, RBracLoc,
3368 ObjCMessageExpr *ObjCMessageExpr::Create(ASTContext &Context, QualType T,
3370 SourceLocation LBracLoc,
3373 ArrayRef<SourceLocation> SelLocs,
3374 ObjCMethodDecl *Method,
3375 ArrayRef<Expr *> Args,
3376 SourceLocation RBracLoc,
3378 assert((!SelLocs.empty() || isImplicit) &&
3379 "No selector locs for non-implicit message");
3380 ObjCMessageExpr *Mem;
3381 SelectorLocationsKind SelLocsK = SelectorLocationsKind();
3383 Mem = alloc(Context, Args.size(), 0);
3385 Mem = alloc(Context, Args, RBracLoc, SelLocs, Sel, SelLocsK);
3386 return new (Mem) ObjCMessageExpr(T, VK, LBracLoc, Receiver, Sel,
3387 SelLocs, SelLocsK, Method, Args, RBracLoc,
3391 ObjCMessageExpr *ObjCMessageExpr::CreateEmpty(ASTContext &Context,
3393 unsigned NumStoredSelLocs) {
3394 ObjCMessageExpr *Mem = alloc(Context, NumArgs, NumStoredSelLocs);
3395 return new (Mem) ObjCMessageExpr(EmptyShell(), NumArgs);
3398 ObjCMessageExpr *ObjCMessageExpr::alloc(ASTContext &C,
3399 ArrayRef<Expr *> Args,
3400 SourceLocation RBraceLoc,
3401 ArrayRef<SourceLocation> SelLocs,
3403 SelectorLocationsKind &SelLocsK) {
3404 SelLocsK = hasStandardSelectorLocs(Sel, SelLocs, Args, RBraceLoc);
3405 unsigned NumStoredSelLocs = (SelLocsK == SelLoc_NonStandard) ? SelLocs.size()
3407 return alloc(C, Args.size(), NumStoredSelLocs);
3410 ObjCMessageExpr *ObjCMessageExpr::alloc(ASTContext &C,
3412 unsigned NumStoredSelLocs) {
3413 unsigned Size = sizeof(ObjCMessageExpr) + sizeof(void *) +
3414 NumArgs * sizeof(Expr *) + NumStoredSelLocs * sizeof(SourceLocation);
3415 return (ObjCMessageExpr *)C.Allocate(Size,
3416 llvm::AlignOf<ObjCMessageExpr>::Alignment);
3419 void ObjCMessageExpr::getSelectorLocs(
3420 SmallVectorImpl<SourceLocation> &SelLocs) const {
3421 for (unsigned i = 0, e = getNumSelectorLocs(); i != e; ++i)
3422 SelLocs.push_back(getSelectorLoc(i));
3425 SourceRange ObjCMessageExpr::getReceiverRange() const {
3426 switch (getReceiverKind()) {
3428 return getInstanceReceiver()->getSourceRange();
3431 return getClassReceiverTypeInfo()->getTypeLoc().getSourceRange();
3435 return getSuperLoc();
3438 llvm_unreachable("Invalid ReceiverKind!");
3441 Selector ObjCMessageExpr::getSelector() const {
3443 return reinterpret_cast<const ObjCMethodDecl *>(SelectorOrMethod)
3445 return Selector(SelectorOrMethod);
3448 QualType ObjCMessageExpr::getReceiverType() const {
3449 switch (getReceiverKind()) {
3451 return getInstanceReceiver()->getType();
3453 return getClassReceiver();
3456 return getSuperType();
3459 llvm_unreachable("unexpected receiver kind");
3462 ObjCInterfaceDecl *ObjCMessageExpr::getReceiverInterface() const {
3463 QualType T = getReceiverType();
3465 if (const ObjCObjectPointerType *Ptr = T->getAs<ObjCObjectPointerType>())
3466 return Ptr->getInterfaceDecl();
3468 if (const ObjCObjectType *Ty = T->getAs<ObjCObjectType>())
3469 return Ty->getInterface();
3474 StringRef ObjCBridgedCastExpr::getBridgeKindName() const {
3475 switch (getBridgeKind()) {
3478 case OBC_BridgeTransfer:
3479 return "__bridge_transfer";
3480 case OBC_BridgeRetained:
3481 return "__bridge_retained";
3484 llvm_unreachable("Invalid BridgeKind!");
3487 bool ChooseExpr::isConditionTrue(const ASTContext &C) const {
3488 return getCond()->EvaluateKnownConstInt(C) != 0;
3491 ShuffleVectorExpr::ShuffleVectorExpr(ASTContext &C, ArrayRef<Expr*> args,
3492 QualType Type, SourceLocation BLoc,
3494 : Expr(ShuffleVectorExprClass, Type, VK_RValue, OK_Ordinary,
3495 Type->isDependentType(), Type->isDependentType(),
3496 Type->isInstantiationDependentType(),
3497 Type->containsUnexpandedParameterPack()),
3498 BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(args.size())
3500 SubExprs = new (C) Stmt*[args.size()];
3501 for (unsigned i = 0; i != args.size(); i++) {
3502 if (args[i]->isTypeDependent())
3503 ExprBits.TypeDependent = true;
3504 if (args[i]->isValueDependent())
3505 ExprBits.ValueDependent = true;
3506 if (args[i]->isInstantiationDependent())
3507 ExprBits.InstantiationDependent = true;
3508 if (args[i]->containsUnexpandedParameterPack())
3509 ExprBits.ContainsUnexpandedParameterPack = true;
3511 SubExprs[i] = args[i];
3515 void ShuffleVectorExpr::setExprs(ASTContext &C, Expr ** Exprs,
3516 unsigned NumExprs) {
3517 if (SubExprs) C.Deallocate(SubExprs);
3519 SubExprs = new (C) Stmt* [NumExprs];
3520 this->NumExprs = NumExprs;
3521 memcpy(SubExprs, Exprs, sizeof(Expr *) * NumExprs);
3524 GenericSelectionExpr::GenericSelectionExpr(ASTContext &Context,
3525 SourceLocation GenericLoc, Expr *ControllingExpr,
3526 ArrayRef<TypeSourceInfo*> AssocTypes,
3527 ArrayRef<Expr*> AssocExprs,
3528 SourceLocation DefaultLoc,
3529 SourceLocation RParenLoc,
3530 bool ContainsUnexpandedParameterPack,
3531 unsigned ResultIndex)
3532 : Expr(GenericSelectionExprClass,
3533 AssocExprs[ResultIndex]->getType(),
3534 AssocExprs[ResultIndex]->getValueKind(),
3535 AssocExprs[ResultIndex]->getObjectKind(),
3536 AssocExprs[ResultIndex]->isTypeDependent(),
3537 AssocExprs[ResultIndex]->isValueDependent(),
3538 AssocExprs[ResultIndex]->isInstantiationDependent(),
3539 ContainsUnexpandedParameterPack),
3540 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3541 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3542 NumAssocs(AssocExprs.size()), ResultIndex(ResultIndex),
3543 GenericLoc(GenericLoc), DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3544 SubExprs[CONTROLLING] = ControllingExpr;
3545 assert(AssocTypes.size() == AssocExprs.size());
3546 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3547 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3550 GenericSelectionExpr::GenericSelectionExpr(ASTContext &Context,
3551 SourceLocation GenericLoc, Expr *ControllingExpr,
3552 ArrayRef<TypeSourceInfo*> AssocTypes,
3553 ArrayRef<Expr*> AssocExprs,
3554 SourceLocation DefaultLoc,
3555 SourceLocation RParenLoc,
3556 bool ContainsUnexpandedParameterPack)
3557 : Expr(GenericSelectionExprClass,
3558 Context.DependentTy,
3561 /*isTypeDependent=*/true,
3562 /*isValueDependent=*/true,
3563 /*isInstantiationDependent=*/true,
3564 ContainsUnexpandedParameterPack),
3565 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3566 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3567 NumAssocs(AssocExprs.size()), ResultIndex(-1U), GenericLoc(GenericLoc),
3568 DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3569 SubExprs[CONTROLLING] = ControllingExpr;
3570 assert(AssocTypes.size() == AssocExprs.size());
3571 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3572 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3575 //===----------------------------------------------------------------------===//
3576 // DesignatedInitExpr
3577 //===----------------------------------------------------------------------===//
3579 IdentifierInfo *DesignatedInitExpr::Designator::getFieldName() const {
3580 assert(Kind == FieldDesignator && "Only valid on a field designator");
3581 if (Field.NameOrField & 0x01)
3582 return reinterpret_cast<IdentifierInfo *>(Field.NameOrField&~0x01);
3584 return getField()->getIdentifier();
3587 DesignatedInitExpr::DesignatedInitExpr(ASTContext &C, QualType Ty,
3588 unsigned NumDesignators,
3589 const Designator *Designators,
3590 SourceLocation EqualOrColonLoc,
3592 ArrayRef<Expr*> IndexExprs,
3594 : Expr(DesignatedInitExprClass, Ty,
3595 Init->getValueKind(), Init->getObjectKind(),
3596 Init->isTypeDependent(), Init->isValueDependent(),
3597 Init->isInstantiationDependent(),
3598 Init->containsUnexpandedParameterPack()),
3599 EqualOrColonLoc(EqualOrColonLoc), GNUSyntax(GNUSyntax),
3600 NumDesignators(NumDesignators), NumSubExprs(IndexExprs.size() + 1) {
3601 this->Designators = new (C) Designator[NumDesignators];
3603 // Record the initializer itself.
3604 child_range Child = children();
3607 // Copy the designators and their subexpressions, computing
3608 // value-dependence along the way.
3609 unsigned IndexIdx = 0;
3610 for (unsigned I = 0; I != NumDesignators; ++I) {
3611 this->Designators[I] = Designators[I];
3613 if (this->Designators[I].isArrayDesignator()) {
3614 // Compute type- and value-dependence.
3615 Expr *Index = IndexExprs[IndexIdx];
3616 if (Index->isTypeDependent() || Index->isValueDependent())
3617 ExprBits.ValueDependent = true;
3618 if (Index->isInstantiationDependent())
3619 ExprBits.InstantiationDependent = true;
3620 // Propagate unexpanded parameter packs.
3621 if (Index->containsUnexpandedParameterPack())
3622 ExprBits.ContainsUnexpandedParameterPack = true;
3624 // Copy the index expressions into permanent storage.
3625 *Child++ = IndexExprs[IndexIdx++];
3626 } else if (this->Designators[I].isArrayRangeDesignator()) {
3627 // Compute type- and value-dependence.
3628 Expr *Start = IndexExprs[IndexIdx];
3629 Expr *End = IndexExprs[IndexIdx + 1];
3630 if (Start->isTypeDependent() || Start->isValueDependent() ||
3631 End->isTypeDependent() || End->isValueDependent()) {
3632 ExprBits.ValueDependent = true;
3633 ExprBits.InstantiationDependent = true;
3634 } else if (Start->isInstantiationDependent() ||
3635 End->isInstantiationDependent()) {
3636 ExprBits.InstantiationDependent = true;
3639 // Propagate unexpanded parameter packs.
3640 if (Start->containsUnexpandedParameterPack() ||
3641 End->containsUnexpandedParameterPack())
3642 ExprBits.ContainsUnexpandedParameterPack = true;
3644 // Copy the start/end expressions into permanent storage.
3645 *Child++ = IndexExprs[IndexIdx++];
3646 *Child++ = IndexExprs[IndexIdx++];
3650 assert(IndexIdx == IndexExprs.size() && "Wrong number of index expressions");
3653 DesignatedInitExpr *
3654 DesignatedInitExpr::Create(ASTContext &C, Designator *Designators,
3655 unsigned NumDesignators,
3656 ArrayRef<Expr*> IndexExprs,
3657 SourceLocation ColonOrEqualLoc,
3658 bool UsesColonSyntax, Expr *Init) {
3659 void *Mem = C.Allocate(sizeof(DesignatedInitExpr) +
3660 sizeof(Stmt *) * (IndexExprs.size() + 1), 8);
3661 return new (Mem) DesignatedInitExpr(C, C.VoidTy, NumDesignators, Designators,
3662 ColonOrEqualLoc, UsesColonSyntax,
3666 DesignatedInitExpr *DesignatedInitExpr::CreateEmpty(ASTContext &C,
3667 unsigned NumIndexExprs) {
3668 void *Mem = C.Allocate(sizeof(DesignatedInitExpr) +
3669 sizeof(Stmt *) * (NumIndexExprs + 1), 8);
3670 return new (Mem) DesignatedInitExpr(NumIndexExprs + 1);
3673 void DesignatedInitExpr::setDesignators(ASTContext &C,
3674 const Designator *Desigs,
3675 unsigned NumDesigs) {
3676 Designators = new (C) Designator[NumDesigs];
3677 NumDesignators = NumDesigs;
3678 for (unsigned I = 0; I != NumDesigs; ++I)
3679 Designators[I] = Desigs[I];
3682 SourceRange DesignatedInitExpr::getDesignatorsSourceRange() const {
3683 DesignatedInitExpr *DIE = const_cast<DesignatedInitExpr*>(this);
3685 return DIE->getDesignator(0)->getSourceRange();
3686 return SourceRange(DIE->getDesignator(0)->getStartLocation(),
3687 DIE->getDesignator(size()-1)->getEndLocation());
3690 SourceRange DesignatedInitExpr::getSourceRange() const {
3691 SourceLocation StartLoc;
3693 *const_cast<DesignatedInitExpr*>(this)->designators_begin();
3694 if (First.isFieldDesignator()) {
3696 StartLoc = SourceLocation::getFromRawEncoding(First.Field.FieldLoc);
3698 StartLoc = SourceLocation::getFromRawEncoding(First.Field.DotLoc);
3701 SourceLocation::getFromRawEncoding(First.ArrayOrRange.LBracketLoc);
3702 return SourceRange(StartLoc, getInit()->getSourceRange().getEnd());
3705 Expr *DesignatedInitExpr::getArrayIndex(const Designator& D) {
3706 assert(D.Kind == Designator::ArrayDesignator && "Requires array designator");
3707 char* Ptr = static_cast<char*>(static_cast<void *>(this));
3708 Ptr += sizeof(DesignatedInitExpr);
3709 Stmt **SubExprs = reinterpret_cast<Stmt**>(reinterpret_cast<void**>(Ptr));
3710 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 1));
3713 Expr *DesignatedInitExpr::getArrayRangeStart(const Designator& D) {
3714 assert(D.Kind == Designator::ArrayRangeDesignator &&
3715 "Requires array range designator");
3716 char* Ptr = static_cast<char*>(static_cast<void *>(this));
3717 Ptr += sizeof(DesignatedInitExpr);
3718 Stmt **SubExprs = reinterpret_cast<Stmt**>(reinterpret_cast<void**>(Ptr));
3719 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 1));
3722 Expr *DesignatedInitExpr::getArrayRangeEnd(const Designator& D) {
3723 assert(D.Kind == Designator::ArrayRangeDesignator &&
3724 "Requires array range designator");
3725 char* Ptr = static_cast<char*>(static_cast<void *>(this));
3726 Ptr += sizeof(DesignatedInitExpr);
3727 Stmt **SubExprs = reinterpret_cast<Stmt**>(reinterpret_cast<void**>(Ptr));
3728 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 2));
3731 /// \brief Replaces the designator at index @p Idx with the series
3732 /// of designators in [First, Last).
3733 void DesignatedInitExpr::ExpandDesignator(ASTContext &C, unsigned Idx,
3734 const Designator *First,
3735 const Designator *Last) {
3736 unsigned NumNewDesignators = Last - First;
3737 if (NumNewDesignators == 0) {
3738 std::copy_backward(Designators + Idx + 1,
3739 Designators + NumDesignators,
3741 --NumNewDesignators;
3743 } else if (NumNewDesignators == 1) {
3744 Designators[Idx] = *First;
3748 Designator *NewDesignators
3749 = new (C) Designator[NumDesignators - 1 + NumNewDesignators];
3750 std::copy(Designators, Designators + Idx, NewDesignators);
3751 std::copy(First, Last, NewDesignators + Idx);
3752 std::copy(Designators + Idx + 1, Designators + NumDesignators,
3753 NewDesignators + Idx + NumNewDesignators);
3754 Designators = NewDesignators;
3755 NumDesignators = NumDesignators - 1 + NumNewDesignators;
3758 ParenListExpr::ParenListExpr(ASTContext& C, SourceLocation lparenloc,
3759 ArrayRef<Expr*> exprs,
3760 SourceLocation rparenloc)
3761 : Expr(ParenListExprClass, QualType(), VK_RValue, OK_Ordinary,
3762 false, false, false, false),
3763 NumExprs(exprs.size()), LParenLoc(lparenloc), RParenLoc(rparenloc) {
3764 Exprs = new (C) Stmt*[exprs.size()];
3765 for (unsigned i = 0; i != exprs.size(); ++i) {
3766 if (exprs[i]->isTypeDependent())
3767 ExprBits.TypeDependent = true;
3768 if (exprs[i]->isValueDependent())
3769 ExprBits.ValueDependent = true;
3770 if (exprs[i]->isInstantiationDependent())
3771 ExprBits.InstantiationDependent = true;
3772 if (exprs[i]->containsUnexpandedParameterPack())
3773 ExprBits.ContainsUnexpandedParameterPack = true;
3775 Exprs[i] = exprs[i];
3779 const OpaqueValueExpr *OpaqueValueExpr::findInCopyConstruct(const Expr *e) {
3780 if (const ExprWithCleanups *ewc = dyn_cast<ExprWithCleanups>(e))
3781 e = ewc->getSubExpr();
3782 if (const MaterializeTemporaryExpr *m = dyn_cast<MaterializeTemporaryExpr>(e))
3783 e = m->GetTemporaryExpr();
3784 e = cast<CXXConstructExpr>(e)->getArg(0);
3785 while (const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(e))
3786 e = ice->getSubExpr();
3787 return cast<OpaqueValueExpr>(e);
3790 PseudoObjectExpr *PseudoObjectExpr::Create(ASTContext &Context, EmptyShell sh,
3791 unsigned numSemanticExprs) {
3792 void *buffer = Context.Allocate(sizeof(PseudoObjectExpr) +
3793 (1 + numSemanticExprs) * sizeof(Expr*),
3794 llvm::alignOf<PseudoObjectExpr>());
3795 return new(buffer) PseudoObjectExpr(sh, numSemanticExprs);
3798 PseudoObjectExpr::PseudoObjectExpr(EmptyShell shell, unsigned numSemanticExprs)
3799 : Expr(PseudoObjectExprClass, shell) {
3800 PseudoObjectExprBits.NumSubExprs = numSemanticExprs + 1;
3803 PseudoObjectExpr *PseudoObjectExpr::Create(ASTContext &C, Expr *syntax,
3804 ArrayRef<Expr*> semantics,
3805 unsigned resultIndex) {
3806 assert(syntax && "no syntactic expression!");
3807 assert(semantics.size() && "no semantic expressions!");
3811 if (resultIndex == NoResult) {
3815 assert(resultIndex < semantics.size());
3816 type = semantics[resultIndex]->getType();
3817 VK = semantics[resultIndex]->getValueKind();
3818 assert(semantics[resultIndex]->getObjectKind() == OK_Ordinary);
3821 void *buffer = C.Allocate(sizeof(PseudoObjectExpr) +
3822 (1 + semantics.size()) * sizeof(Expr*),
3823 llvm::alignOf<PseudoObjectExpr>());
3824 return new(buffer) PseudoObjectExpr(type, VK, syntax, semantics,
3828 PseudoObjectExpr::PseudoObjectExpr(QualType type, ExprValueKind VK,
3829 Expr *syntax, ArrayRef<Expr*> semantics,
3830 unsigned resultIndex)
3831 : Expr(PseudoObjectExprClass, type, VK, OK_Ordinary,
3832 /*filled in at end of ctor*/ false, false, false, false) {
3833 PseudoObjectExprBits.NumSubExprs = semantics.size() + 1;
3834 PseudoObjectExprBits.ResultIndex = resultIndex + 1;
3836 for (unsigned i = 0, e = semantics.size() + 1; i != e; ++i) {
3837 Expr *E = (i == 0 ? syntax : semantics[i-1]);
3838 getSubExprsBuffer()[i] = E;
3840 if (E->isTypeDependent())
3841 ExprBits.TypeDependent = true;
3842 if (E->isValueDependent())
3843 ExprBits.ValueDependent = true;
3844 if (E->isInstantiationDependent())
3845 ExprBits.InstantiationDependent = true;
3846 if (E->containsUnexpandedParameterPack())
3847 ExprBits.ContainsUnexpandedParameterPack = true;
3849 if (isa<OpaqueValueExpr>(E))
3850 assert(cast<OpaqueValueExpr>(E)->getSourceExpr() != 0 &&
3851 "opaque-value semantic expressions for pseudo-object "
3852 "operations must have sources");
3856 //===----------------------------------------------------------------------===//
3858 //===----------------------------------------------------------------------===//
3860 Expr* ExprIterator::operator[](size_t idx) { return cast<Expr>(I[idx]); }
3861 Expr* ExprIterator::operator*() const { return cast<Expr>(*I); }
3862 Expr* ExprIterator::operator->() const { return cast<Expr>(*I); }
3863 const Expr* ConstExprIterator::operator[](size_t idx) const {
3864 return cast<Expr>(I[idx]);
3866 const Expr* ConstExprIterator::operator*() const { return cast<Expr>(*I); }
3867 const Expr* ConstExprIterator::operator->() const { return cast<Expr>(*I); }
3869 //===----------------------------------------------------------------------===//
3870 // Child Iterators for iterating over subexpressions/substatements
3871 //===----------------------------------------------------------------------===//
3873 // UnaryExprOrTypeTraitExpr
3874 Stmt::child_range UnaryExprOrTypeTraitExpr::children() {
3875 // If this is of a type and the type is a VLA type (and not a typedef), the
3876 // size expression of the VLA needs to be treated as an executable expression.
3877 // Why isn't this weirdness documented better in StmtIterator?
3878 if (isArgumentType()) {
3879 if (const VariableArrayType* T = dyn_cast<VariableArrayType>(
3880 getArgumentType().getTypePtr()))
3881 return child_range(child_iterator(T), child_iterator());
3882 return child_range();
3884 return child_range(&Argument.Ex, &Argument.Ex + 1);
3888 Stmt::child_range ObjCMessageExpr::children() {
3890 if (getReceiverKind() == Instance)
3891 begin = reinterpret_cast<Stmt **>(this + 1);
3893 begin = reinterpret_cast<Stmt **>(getArgs());
3894 return child_range(begin,
3895 reinterpret_cast<Stmt **>(getArgs() + getNumArgs()));
3898 ObjCArrayLiteral::ObjCArrayLiteral(llvm::ArrayRef<Expr *> Elements,
3899 QualType T, ObjCMethodDecl *Method,
3901 : Expr(ObjCArrayLiteralClass, T, VK_RValue, OK_Ordinary,
3902 false, false, false, false),
3903 NumElements(Elements.size()), Range(SR), ArrayWithObjectsMethod(Method)
3905 Expr **SaveElements = getElements();
3906 for (unsigned I = 0, N = Elements.size(); I != N; ++I) {
3907 if (Elements[I]->isTypeDependent() || Elements[I]->isValueDependent())
3908 ExprBits.ValueDependent = true;
3909 if (Elements[I]->isInstantiationDependent())
3910 ExprBits.InstantiationDependent = true;
3911 if (Elements[I]->containsUnexpandedParameterPack())
3912 ExprBits.ContainsUnexpandedParameterPack = true;
3914 SaveElements[I] = Elements[I];
3918 ObjCArrayLiteral *ObjCArrayLiteral::Create(ASTContext &C,
3919 llvm::ArrayRef<Expr *> Elements,
3920 QualType T, ObjCMethodDecl * Method,
3922 void *Mem = C.Allocate(sizeof(ObjCArrayLiteral)
3923 + Elements.size() * sizeof(Expr *));
3924 return new (Mem) ObjCArrayLiteral(Elements, T, Method, SR);
3927 ObjCArrayLiteral *ObjCArrayLiteral::CreateEmpty(ASTContext &C,
3928 unsigned NumElements) {
3930 void *Mem = C.Allocate(sizeof(ObjCArrayLiteral)
3931 + NumElements * sizeof(Expr *));
3932 return new (Mem) ObjCArrayLiteral(EmptyShell(), NumElements);
3935 ObjCDictionaryLiteral::ObjCDictionaryLiteral(
3936 ArrayRef<ObjCDictionaryElement> VK,
3937 bool HasPackExpansions,
3938 QualType T, ObjCMethodDecl *method,
3940 : Expr(ObjCDictionaryLiteralClass, T, VK_RValue, OK_Ordinary, false, false,
3942 NumElements(VK.size()), HasPackExpansions(HasPackExpansions), Range(SR),
3943 DictWithObjectsMethod(method)
3945 KeyValuePair *KeyValues = getKeyValues();
3946 ExpansionData *Expansions = getExpansionData();
3947 for (unsigned I = 0; I < NumElements; I++) {
3948 if (VK[I].Key->isTypeDependent() || VK[I].Key->isValueDependent() ||
3949 VK[I].Value->isTypeDependent() || VK[I].Value->isValueDependent())
3950 ExprBits.ValueDependent = true;
3951 if (VK[I].Key->isInstantiationDependent() ||
3952 VK[I].Value->isInstantiationDependent())
3953 ExprBits.InstantiationDependent = true;
3954 if (VK[I].EllipsisLoc.isInvalid() &&
3955 (VK[I].Key->containsUnexpandedParameterPack() ||
3956 VK[I].Value->containsUnexpandedParameterPack()))
3957 ExprBits.ContainsUnexpandedParameterPack = true;
3959 KeyValues[I].Key = VK[I].Key;
3960 KeyValues[I].Value = VK[I].Value;
3962 Expansions[I].EllipsisLoc = VK[I].EllipsisLoc;
3963 if (VK[I].NumExpansions)
3964 Expansions[I].NumExpansionsPlusOne = *VK[I].NumExpansions + 1;
3966 Expansions[I].NumExpansionsPlusOne = 0;
3971 ObjCDictionaryLiteral *
3972 ObjCDictionaryLiteral::Create(ASTContext &C,
3973 ArrayRef<ObjCDictionaryElement> VK,
3974 bool HasPackExpansions,
3975 QualType T, ObjCMethodDecl *method,
3977 unsigned ExpansionsSize = 0;
3978 if (HasPackExpansions)
3979 ExpansionsSize = sizeof(ExpansionData) * VK.size();
3981 void *Mem = C.Allocate(sizeof(ObjCDictionaryLiteral) +
3982 sizeof(KeyValuePair) * VK.size() + ExpansionsSize);
3983 return new (Mem) ObjCDictionaryLiteral(VK, HasPackExpansions, T, method, SR);
3986 ObjCDictionaryLiteral *
3987 ObjCDictionaryLiteral::CreateEmpty(ASTContext &C, unsigned NumElements,
3988 bool HasPackExpansions) {
3989 unsigned ExpansionsSize = 0;
3990 if (HasPackExpansions)
3991 ExpansionsSize = sizeof(ExpansionData) * NumElements;
3992 void *Mem = C.Allocate(sizeof(ObjCDictionaryLiteral) +
3993 sizeof(KeyValuePair) * NumElements + ExpansionsSize);
3994 return new (Mem) ObjCDictionaryLiteral(EmptyShell(), NumElements,
3998 ObjCSubscriptRefExpr *ObjCSubscriptRefExpr::Create(ASTContext &C,
4000 Expr *key, QualType T,
4001 ObjCMethodDecl *getMethod,
4002 ObjCMethodDecl *setMethod,
4003 SourceLocation RB) {
4004 void *Mem = C.Allocate(sizeof(ObjCSubscriptRefExpr));
4005 return new (Mem) ObjCSubscriptRefExpr(base, key, T, VK_LValue,
4007 getMethod, setMethod, RB);
4010 AtomicExpr::AtomicExpr(SourceLocation BLoc, ArrayRef<Expr*> args,
4011 QualType t, AtomicOp op, SourceLocation RP)
4012 : Expr(AtomicExprClass, t, VK_RValue, OK_Ordinary,
4013 false, false, false, false),
4014 NumSubExprs(args.size()), BuiltinLoc(BLoc), RParenLoc(RP), Op(op)
4016 assert(args.size() == getNumSubExprs(op) && "wrong number of subexpressions");
4017 for (unsigned i = 0; i != args.size(); i++) {
4018 if (args[i]->isTypeDependent())
4019 ExprBits.TypeDependent = true;
4020 if (args[i]->isValueDependent())
4021 ExprBits.ValueDependent = true;
4022 if (args[i]->isInstantiationDependent())
4023 ExprBits.InstantiationDependent = true;
4024 if (args[i]->containsUnexpandedParameterPack())
4025 ExprBits.ContainsUnexpandedParameterPack = true;
4027 SubExprs[i] = args[i];
4031 unsigned AtomicExpr::getNumSubExprs(AtomicOp Op) {
4033 case AO__c11_atomic_init:
4034 case AO__c11_atomic_load:
4035 case AO__atomic_load_n:
4038 case AO__c11_atomic_store:
4039 case AO__c11_atomic_exchange:
4040 case AO__atomic_load:
4041 case AO__atomic_store:
4042 case AO__atomic_store_n:
4043 case AO__atomic_exchange_n:
4044 case AO__c11_atomic_fetch_add:
4045 case AO__c11_atomic_fetch_sub:
4046 case AO__c11_atomic_fetch_and:
4047 case AO__c11_atomic_fetch_or:
4048 case AO__c11_atomic_fetch_xor:
4049 case AO__atomic_fetch_add:
4050 case AO__atomic_fetch_sub:
4051 case AO__atomic_fetch_and:
4052 case AO__atomic_fetch_or:
4053 case AO__atomic_fetch_xor:
4054 case AO__atomic_fetch_nand:
4055 case AO__atomic_add_fetch:
4056 case AO__atomic_sub_fetch:
4057 case AO__atomic_and_fetch:
4058 case AO__atomic_or_fetch:
4059 case AO__atomic_xor_fetch:
4060 case AO__atomic_nand_fetch:
4063 case AO__atomic_exchange:
4066 case AO__c11_atomic_compare_exchange_strong:
4067 case AO__c11_atomic_compare_exchange_weak:
4070 case AO__atomic_compare_exchange:
4071 case AO__atomic_compare_exchange_n:
4074 llvm_unreachable("unknown atomic op");