1 //===--- Expr.cpp - Expression AST Node Implementation --------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the Expr class and subclasses.
12 //===----------------------------------------------------------------------===//
14 #include "clang/AST/APValue.h"
15 #include "clang/AST/ASTContext.h"
16 #include "clang/AST/Attr.h"
17 #include "clang/AST/DeclCXX.h"
18 #include "clang/AST/DeclObjC.h"
19 #include "clang/AST/DeclTemplate.h"
20 #include "clang/AST/EvaluatedExprVisitor.h"
21 #include "clang/AST/Expr.h"
22 #include "clang/AST/ExprCXX.h"
23 #include "clang/AST/Mangle.h"
24 #include "clang/AST/RecordLayout.h"
25 #include "clang/AST/StmtVisitor.h"
26 #include "clang/Basic/Builtins.h"
27 #include "clang/Basic/CharInfo.h"
28 #include "clang/Basic/SourceManager.h"
29 #include "clang/Basic/TargetInfo.h"
30 #include "clang/Lex/Lexer.h"
31 #include "clang/Lex/LiteralSupport.h"
32 #include "clang/Sema/SemaDiagnostic.h"
33 #include "llvm/Support/ErrorHandling.h"
34 #include "llvm/Support/raw_ostream.h"
37 using namespace clang;
39 const CXXRecordDecl *Expr::getBestDynamicClassType() const {
40 const Expr *E = ignoreParenBaseCasts();
42 QualType DerivedType = E->getType();
43 if (const PointerType *PTy = DerivedType->getAs<PointerType>())
44 DerivedType = PTy->getPointeeType();
46 if (DerivedType->isDependentType())
49 const RecordType *Ty = DerivedType->castAs<RecordType>();
50 Decl *D = Ty->getDecl();
51 return cast<CXXRecordDecl>(D);
54 const Expr *Expr::skipRValueSubobjectAdjustments(
55 SmallVectorImpl<const Expr *> &CommaLHSs,
56 SmallVectorImpl<SubobjectAdjustment> &Adjustments) const {
59 E = E->IgnoreParens();
61 if (const CastExpr *CE = dyn_cast<CastExpr>(E)) {
62 if ((CE->getCastKind() == CK_DerivedToBase ||
63 CE->getCastKind() == CK_UncheckedDerivedToBase) &&
64 E->getType()->isRecordType()) {
66 CXXRecordDecl *Derived
67 = cast<CXXRecordDecl>(E->getType()->getAs<RecordType>()->getDecl());
68 Adjustments.push_back(SubobjectAdjustment(CE, Derived));
72 if (CE->getCastKind() == CK_NoOp) {
76 } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) {
78 assert(ME->getBase()->getType()->isRecordType());
79 if (FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl())) {
80 if (!Field->isBitField() && !Field->getType()->isReferenceType()) {
82 Adjustments.push_back(SubobjectAdjustment(Field));
87 } else if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
88 if (BO->isPtrMemOp()) {
89 assert(BO->getRHS()->isRValue());
91 const MemberPointerType *MPT =
92 BO->getRHS()->getType()->getAs<MemberPointerType>();
93 Adjustments.push_back(SubobjectAdjustment(MPT, BO->getRHS()));
95 } else if (BO->getOpcode() == BO_Comma) {
96 CommaLHSs.push_back(BO->getLHS());
108 /// isKnownToHaveBooleanValue - Return true if this is an integer expression
109 /// that is known to return 0 or 1. This happens for _Bool/bool expressions
110 /// but also int expressions which are produced by things like comparisons in
112 bool Expr::isKnownToHaveBooleanValue() const {
113 const Expr *E = IgnoreParens();
115 // If this value has _Bool type, it is obvious 0/1.
116 if (E->getType()->isBooleanType()) return true;
117 // If this is a non-scalar-integer type, we don't care enough to try.
118 if (!E->getType()->isIntegralOrEnumerationType()) return false;
120 if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
121 switch (UO->getOpcode()) {
123 return UO->getSubExpr()->isKnownToHaveBooleanValue();
131 // Only look through implicit casts. If the user writes
132 // '(int) (a && b)' treat it as an arbitrary int.
133 if (const ImplicitCastExpr *CE = dyn_cast<ImplicitCastExpr>(E))
134 return CE->getSubExpr()->isKnownToHaveBooleanValue();
136 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
137 switch (BO->getOpcode()) {
138 default: return false;
139 case BO_LT: // Relational operators.
143 case BO_EQ: // Equality operators.
145 case BO_LAnd: // AND operator.
146 case BO_LOr: // Logical OR operator.
149 case BO_And: // Bitwise AND operator.
150 case BO_Xor: // Bitwise XOR operator.
151 case BO_Or: // Bitwise OR operator.
152 // Handle things like (x==2)|(y==12).
153 return BO->getLHS()->isKnownToHaveBooleanValue() &&
154 BO->getRHS()->isKnownToHaveBooleanValue();
158 return BO->getRHS()->isKnownToHaveBooleanValue();
162 if (const ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E))
163 return CO->getTrueExpr()->isKnownToHaveBooleanValue() &&
164 CO->getFalseExpr()->isKnownToHaveBooleanValue();
169 // Amusing macro metaprogramming hack: check whether a class provides
170 // a more specific implementation of getExprLoc().
172 // See also Stmt.cpp:{getLocStart(),getLocEnd()}.
174 /// This implementation is used when a class provides a custom
175 /// implementation of getExprLoc.
176 template <class E, class T>
177 SourceLocation getExprLocImpl(const Expr *expr,
178 SourceLocation (T::*v)() const) {
179 return static_cast<const E*>(expr)->getExprLoc();
182 /// This implementation is used when a class doesn't provide
183 /// a custom implementation of getExprLoc. Overload resolution
184 /// should pick it over the implementation above because it's
185 /// more specialized according to function template partial ordering.
187 SourceLocation getExprLocImpl(const Expr *expr,
188 SourceLocation (Expr::*v)() const) {
189 return static_cast<const E*>(expr)->getLocStart();
193 SourceLocation Expr::getExprLoc() const {
194 switch (getStmtClass()) {
195 case Stmt::NoStmtClass: llvm_unreachable("statement without class");
196 #define ABSTRACT_STMT(type)
197 #define STMT(type, base) \
198 case Stmt::type##Class: llvm_unreachable(#type " is not an Expr"); break;
199 #define EXPR(type, base) \
200 case Stmt::type##Class: return getExprLocImpl<type>(this, &type::getExprLoc);
201 #include "clang/AST/StmtNodes.inc"
203 llvm_unreachable("unknown statement kind");
206 //===----------------------------------------------------------------------===//
207 // Primary Expressions.
208 //===----------------------------------------------------------------------===//
210 /// \brief Compute the type-, value-, and instantiation-dependence of a
211 /// declaration reference
212 /// based on the declaration being referenced.
213 static void computeDeclRefDependence(const ASTContext &Ctx, NamedDecl *D,
214 QualType T, bool &TypeDependent,
215 bool &ValueDependent,
216 bool &InstantiationDependent) {
217 TypeDependent = false;
218 ValueDependent = false;
219 InstantiationDependent = false;
221 // (TD) C++ [temp.dep.expr]p3:
222 // An id-expression is type-dependent if it contains:
226 // (VD) C++ [temp.dep.constexpr]p2:
227 // An identifier is value-dependent if it is:
229 // (TD) - an identifier that was declared with dependent type
230 // (VD) - a name declared with a dependent type,
231 if (T->isDependentType()) {
232 TypeDependent = true;
233 ValueDependent = true;
234 InstantiationDependent = true;
236 } else if (T->isInstantiationDependentType()) {
237 InstantiationDependent = true;
240 // (TD) - a conversion-function-id that specifies a dependent type
241 if (D->getDeclName().getNameKind()
242 == DeclarationName::CXXConversionFunctionName) {
243 QualType T = D->getDeclName().getCXXNameType();
244 if (T->isDependentType()) {
245 TypeDependent = true;
246 ValueDependent = true;
247 InstantiationDependent = true;
251 if (T->isInstantiationDependentType())
252 InstantiationDependent = true;
255 // (VD) - the name of a non-type template parameter,
256 if (isa<NonTypeTemplateParmDecl>(D)) {
257 ValueDependent = true;
258 InstantiationDependent = true;
262 // (VD) - a constant with integral or enumeration type and is
263 // initialized with an expression that is value-dependent.
264 // (VD) - a constant with literal type and is initialized with an
265 // expression that is value-dependent [C++11].
266 // (VD) - FIXME: Missing from the standard:
267 // - an entity with reference type and is initialized with an
268 // expression that is value-dependent [C++11]
269 if (VarDecl *Var = dyn_cast<VarDecl>(D)) {
270 if ((Ctx.getLangOpts().CPlusPlus11 ?
271 Var->getType()->isLiteralType(Ctx) :
272 Var->getType()->isIntegralOrEnumerationType()) &&
273 (Var->getType().isConstQualified() ||
274 Var->getType()->isReferenceType())) {
275 if (const Expr *Init = Var->getAnyInitializer())
276 if (Init->isValueDependent()) {
277 ValueDependent = true;
278 InstantiationDependent = true;
282 // (VD) - FIXME: Missing from the standard:
283 // - a member function or a static data member of the current
285 if (Var->isStaticDataMember() &&
286 Var->getDeclContext()->isDependentContext()) {
287 ValueDependent = true;
288 InstantiationDependent = true;
289 TypeSourceInfo *TInfo = Var->getFirstDecl()->getTypeSourceInfo();
290 if (TInfo->getType()->isIncompleteArrayType())
291 TypeDependent = true;
297 // (VD) - FIXME: Missing from the standard:
298 // - a member function or a static data member of the current
300 if (isa<CXXMethodDecl>(D) && D->getDeclContext()->isDependentContext()) {
301 ValueDependent = true;
302 InstantiationDependent = true;
306 void DeclRefExpr::computeDependence(const ASTContext &Ctx) {
307 bool TypeDependent = false;
308 bool ValueDependent = false;
309 bool InstantiationDependent = false;
310 computeDeclRefDependence(Ctx, getDecl(), getType(), TypeDependent,
311 ValueDependent, InstantiationDependent);
313 // (TD) C++ [temp.dep.expr]p3:
314 // An id-expression is type-dependent if it contains:
318 // (VD) C++ [temp.dep.constexpr]p2:
319 // An identifier is value-dependent if it is:
320 if (!TypeDependent && !ValueDependent &&
321 hasExplicitTemplateArgs() &&
322 TemplateSpecializationType::anyDependentTemplateArguments(
324 getNumTemplateArgs(),
325 InstantiationDependent)) {
326 TypeDependent = true;
327 ValueDependent = true;
328 InstantiationDependent = true;
331 ExprBits.TypeDependent = TypeDependent;
332 ExprBits.ValueDependent = ValueDependent;
333 ExprBits.InstantiationDependent = InstantiationDependent;
335 // Is the declaration a parameter pack?
336 if (getDecl()->isParameterPack())
337 ExprBits.ContainsUnexpandedParameterPack = true;
340 DeclRefExpr::DeclRefExpr(const ASTContext &Ctx,
341 NestedNameSpecifierLoc QualifierLoc,
342 SourceLocation TemplateKWLoc,
343 ValueDecl *D, bool RefersToEnclosingLocal,
344 const DeclarationNameInfo &NameInfo,
346 const TemplateArgumentListInfo *TemplateArgs,
347 QualType T, ExprValueKind VK)
348 : Expr(DeclRefExprClass, T, VK, OK_Ordinary, false, false, false, false),
349 D(D), Loc(NameInfo.getLoc()), DNLoc(NameInfo.getInfo()) {
350 DeclRefExprBits.HasQualifier = QualifierLoc ? 1 : 0;
352 getInternalQualifierLoc() = QualifierLoc;
353 DeclRefExprBits.HasFoundDecl = FoundD ? 1 : 0;
355 getInternalFoundDecl() = FoundD;
356 DeclRefExprBits.HasTemplateKWAndArgsInfo
357 = (TemplateArgs || TemplateKWLoc.isValid()) ? 1 : 0;
358 DeclRefExprBits.RefersToEnclosingLocal = RefersToEnclosingLocal;
360 bool Dependent = false;
361 bool InstantiationDependent = false;
362 bool ContainsUnexpandedParameterPack = false;
363 getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc, *TemplateArgs,
365 InstantiationDependent,
366 ContainsUnexpandedParameterPack);
367 if (InstantiationDependent)
368 setInstantiationDependent(true);
369 } else if (TemplateKWLoc.isValid()) {
370 getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc);
372 DeclRefExprBits.HadMultipleCandidates = 0;
374 computeDependence(Ctx);
377 DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
378 NestedNameSpecifierLoc QualifierLoc,
379 SourceLocation TemplateKWLoc,
381 bool RefersToEnclosingLocal,
382 SourceLocation NameLoc,
386 const TemplateArgumentListInfo *TemplateArgs) {
387 return Create(Context, QualifierLoc, TemplateKWLoc, D,
388 RefersToEnclosingLocal,
389 DeclarationNameInfo(D->getDeclName(), NameLoc),
390 T, VK, FoundD, TemplateArgs);
393 DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
394 NestedNameSpecifierLoc QualifierLoc,
395 SourceLocation TemplateKWLoc,
397 bool RefersToEnclosingLocal,
398 const DeclarationNameInfo &NameInfo,
402 const TemplateArgumentListInfo *TemplateArgs) {
403 // Filter out cases where the found Decl is the same as the value refenenced.
407 std::size_t Size = sizeof(DeclRefExpr);
409 Size += sizeof(NestedNameSpecifierLoc);
411 Size += sizeof(NamedDecl *);
413 Size += ASTTemplateKWAndArgsInfo::sizeFor(TemplateArgs->size());
414 else if (TemplateKWLoc.isValid())
415 Size += ASTTemplateKWAndArgsInfo::sizeFor(0);
417 void *Mem = Context.Allocate(Size, llvm::alignOf<DeclRefExpr>());
418 return new (Mem) DeclRefExpr(Context, QualifierLoc, TemplateKWLoc, D,
419 RefersToEnclosingLocal,
420 NameInfo, FoundD, TemplateArgs, T, VK);
423 DeclRefExpr *DeclRefExpr::CreateEmpty(const ASTContext &Context,
426 bool HasTemplateKWAndArgsInfo,
427 unsigned NumTemplateArgs) {
428 std::size_t Size = sizeof(DeclRefExpr);
430 Size += sizeof(NestedNameSpecifierLoc);
432 Size += sizeof(NamedDecl *);
433 if (HasTemplateKWAndArgsInfo)
434 Size += ASTTemplateKWAndArgsInfo::sizeFor(NumTemplateArgs);
436 void *Mem = Context.Allocate(Size, llvm::alignOf<DeclRefExpr>());
437 return new (Mem) DeclRefExpr(EmptyShell());
440 SourceLocation DeclRefExpr::getLocStart() const {
442 return getQualifierLoc().getBeginLoc();
443 return getNameInfo().getLocStart();
445 SourceLocation DeclRefExpr::getLocEnd() const {
446 if (hasExplicitTemplateArgs())
447 return getRAngleLoc();
448 return getNameInfo().getLocEnd();
451 // FIXME: Maybe this should use DeclPrinter with a special "print predefined
452 // expr" policy instead.
453 std::string PredefinedExpr::ComputeName(IdentType IT, const Decl *CurrentDecl) {
454 ASTContext &Context = CurrentDecl->getASTContext();
456 if (IT == PredefinedExpr::FuncDName) {
457 if (const NamedDecl *ND = dyn_cast<NamedDecl>(CurrentDecl)) {
458 std::unique_ptr<MangleContext> MC;
459 MC.reset(Context.createMangleContext());
461 if (MC->shouldMangleDeclName(ND)) {
462 SmallString<256> Buffer;
463 llvm::raw_svector_ostream Out(Buffer);
464 if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(ND))
465 MC->mangleCXXCtor(CD, Ctor_Base, Out);
466 else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(ND))
467 MC->mangleCXXDtor(DD, Dtor_Base, Out);
469 MC->mangleName(ND, Out);
472 if (!Buffer.empty() && Buffer.front() == '\01')
473 return Buffer.substr(1);
476 return ND->getIdentifier()->getName();
480 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(CurrentDecl)) {
481 if (IT != PrettyFunction && IT != PrettyFunctionNoVirtual && IT != FuncSig)
482 return FD->getNameAsString();
484 SmallString<256> Name;
485 llvm::raw_svector_ostream Out(Name);
487 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
488 if (MD->isVirtual() && IT != PrettyFunctionNoVirtual)
494 PrintingPolicy Policy(Context.getLangOpts());
496 llvm::raw_string_ostream POut(Proto);
498 const FunctionDecl *Decl = FD;
499 if (const FunctionDecl* Pattern = FD->getTemplateInstantiationPattern())
501 const FunctionType *AFT = Decl->getType()->getAs<FunctionType>();
502 const FunctionProtoType *FT = nullptr;
503 if (FD->hasWrittenPrototype())
504 FT = dyn_cast<FunctionProtoType>(AFT);
507 switch (FT->getCallConv()) {
508 case CC_C: POut << "__cdecl "; break;
509 case CC_X86StdCall: POut << "__stdcall "; break;
510 case CC_X86FastCall: POut << "__fastcall "; break;
511 case CC_X86ThisCall: POut << "__thiscall "; break;
512 // Only bother printing the conventions that MSVC knows about.
517 FD->printQualifiedName(POut, Policy);
521 for (unsigned i = 0, e = Decl->getNumParams(); i != e; ++i) {
523 POut << Decl->getParamDecl(i)->getType().stream(Policy);
526 if (FT->isVariadic()) {
527 if (FD->getNumParams()) POut << ", ";
533 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
534 const FunctionType *FT = MD->getType()->castAs<FunctionType>();
537 if (FT->isVolatile())
539 RefQualifierKind Ref = MD->getRefQualifier();
540 if (Ref == RQ_LValue)
542 else if (Ref == RQ_RValue)
546 typedef SmallVector<const ClassTemplateSpecializationDecl *, 8> SpecsTy;
548 const DeclContext *Ctx = FD->getDeclContext();
549 while (Ctx && isa<NamedDecl>(Ctx)) {
550 const ClassTemplateSpecializationDecl *Spec
551 = dyn_cast<ClassTemplateSpecializationDecl>(Ctx);
552 if (Spec && !Spec->isExplicitSpecialization())
553 Specs.push_back(Spec);
554 Ctx = Ctx->getParent();
557 std::string TemplateParams;
558 llvm::raw_string_ostream TOut(TemplateParams);
559 for (SpecsTy::reverse_iterator I = Specs.rbegin(), E = Specs.rend();
561 const TemplateParameterList *Params
562 = (*I)->getSpecializedTemplate()->getTemplateParameters();
563 const TemplateArgumentList &Args = (*I)->getTemplateArgs();
564 assert(Params->size() == Args.size());
565 for (unsigned i = 0, numParams = Params->size(); i != numParams; ++i) {
566 StringRef Param = Params->getParam(i)->getName();
567 if (Param.empty()) continue;
568 TOut << Param << " = ";
569 Args.get(i).print(Policy, TOut);
574 FunctionTemplateSpecializationInfo *FSI
575 = FD->getTemplateSpecializationInfo();
576 if (FSI && !FSI->isExplicitSpecialization()) {
577 const TemplateParameterList* Params
578 = FSI->getTemplate()->getTemplateParameters();
579 const TemplateArgumentList* Args = FSI->TemplateArguments;
580 assert(Params->size() == Args->size());
581 for (unsigned i = 0, e = Params->size(); i != e; ++i) {
582 StringRef Param = Params->getParam(i)->getName();
583 if (Param.empty()) continue;
584 TOut << Param << " = ";
585 Args->get(i).print(Policy, TOut);
591 if (!TemplateParams.empty()) {
592 // remove the trailing comma and space
593 TemplateParams.resize(TemplateParams.size() - 2);
594 POut << " [" << TemplateParams << "]";
599 // Print "auto" for all deduced return types. This includes C++1y return
600 // type deduction and lambdas. For trailing return types resolve the
601 // decltype expression. Otherwise print the real type when this is
602 // not a constructor or destructor.
603 if ((isa<CXXMethodDecl>(FD) &&
604 cast<CXXMethodDecl>(FD)->getParent()->isLambda()) ||
605 (FT && FT->getReturnType()->getAs<AutoType>()))
606 Proto = "auto " + Proto;
607 else if (FT && FT->getReturnType()->getAs<DecltypeType>())
609 ->getAs<DecltypeType>()
610 ->getUnderlyingType()
611 .getAsStringInternal(Proto, Policy);
612 else if (!isa<CXXConstructorDecl>(FD) && !isa<CXXDestructorDecl>(FD))
613 AFT->getReturnType().getAsStringInternal(Proto, Policy);
618 return Name.str().str();
620 if (const CapturedDecl *CD = dyn_cast<CapturedDecl>(CurrentDecl)) {
621 for (const DeclContext *DC = CD->getParent(); DC; DC = DC->getParent())
622 // Skip to its enclosing function or method, but not its enclosing
624 if (DC->isFunctionOrMethod() && (DC->getDeclKind() != Decl::Captured)) {
625 const Decl *D = Decl::castFromDeclContext(DC);
626 return ComputeName(IT, D);
628 llvm_unreachable("CapturedDecl not inside a function or method");
630 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(CurrentDecl)) {
631 SmallString<256> Name;
632 llvm::raw_svector_ostream Out(Name);
633 Out << (MD->isInstanceMethod() ? '-' : '+');
636 // For incorrect code, there might not be an ObjCInterfaceDecl. Do
637 // a null check to avoid a crash.
638 if (const ObjCInterfaceDecl *ID = MD->getClassInterface())
641 if (const ObjCCategoryImplDecl *CID =
642 dyn_cast<ObjCCategoryImplDecl>(MD->getDeclContext()))
643 Out << '(' << *CID << ')';
646 MD->getSelector().print(Out);
650 return Name.str().str();
652 if (isa<TranslationUnitDecl>(CurrentDecl) && IT == PrettyFunction) {
653 // __PRETTY_FUNCTION__ -> "top level", the others produce an empty string.
659 void APNumericStorage::setIntValue(const ASTContext &C,
660 const llvm::APInt &Val) {
664 BitWidth = Val.getBitWidth();
665 unsigned NumWords = Val.getNumWords();
666 const uint64_t* Words = Val.getRawData();
668 pVal = new (C) uint64_t[NumWords];
669 std::copy(Words, Words + NumWords, pVal);
670 } else if (NumWords == 1)
676 IntegerLiteral::IntegerLiteral(const ASTContext &C, const llvm::APInt &V,
677 QualType type, SourceLocation l)
678 : Expr(IntegerLiteralClass, type, VK_RValue, OK_Ordinary, false, false,
681 assert(type->isIntegerType() && "Illegal type in IntegerLiteral");
682 assert(V.getBitWidth() == C.getIntWidth(type) &&
683 "Integer type is not the correct size for constant.");
688 IntegerLiteral::Create(const ASTContext &C, const llvm::APInt &V,
689 QualType type, SourceLocation l) {
690 return new (C) IntegerLiteral(C, V, type, l);
694 IntegerLiteral::Create(const ASTContext &C, EmptyShell Empty) {
695 return new (C) IntegerLiteral(Empty);
698 FloatingLiteral::FloatingLiteral(const ASTContext &C, const llvm::APFloat &V,
699 bool isexact, QualType Type, SourceLocation L)
700 : Expr(FloatingLiteralClass, Type, VK_RValue, OK_Ordinary, false, false,
701 false, false), Loc(L) {
702 setSemantics(V.getSemantics());
703 FloatingLiteralBits.IsExact = isexact;
707 FloatingLiteral::FloatingLiteral(const ASTContext &C, EmptyShell Empty)
708 : Expr(FloatingLiteralClass, Empty) {
709 setRawSemantics(IEEEhalf);
710 FloatingLiteralBits.IsExact = false;
714 FloatingLiteral::Create(const ASTContext &C, const llvm::APFloat &V,
715 bool isexact, QualType Type, SourceLocation L) {
716 return new (C) FloatingLiteral(C, V, isexact, Type, L);
720 FloatingLiteral::Create(const ASTContext &C, EmptyShell Empty) {
721 return new (C) FloatingLiteral(C, Empty);
724 const llvm::fltSemantics &FloatingLiteral::getSemantics() const {
725 switch(FloatingLiteralBits.Semantics) {
727 return llvm::APFloat::IEEEhalf;
729 return llvm::APFloat::IEEEsingle;
731 return llvm::APFloat::IEEEdouble;
732 case x87DoubleExtended:
733 return llvm::APFloat::x87DoubleExtended;
735 return llvm::APFloat::IEEEquad;
736 case PPCDoubleDouble:
737 return llvm::APFloat::PPCDoubleDouble;
739 llvm_unreachable("Unrecognised floating semantics");
742 void FloatingLiteral::setSemantics(const llvm::fltSemantics &Sem) {
743 if (&Sem == &llvm::APFloat::IEEEhalf)
744 FloatingLiteralBits.Semantics = IEEEhalf;
745 else if (&Sem == &llvm::APFloat::IEEEsingle)
746 FloatingLiteralBits.Semantics = IEEEsingle;
747 else if (&Sem == &llvm::APFloat::IEEEdouble)
748 FloatingLiteralBits.Semantics = IEEEdouble;
749 else if (&Sem == &llvm::APFloat::x87DoubleExtended)
750 FloatingLiteralBits.Semantics = x87DoubleExtended;
751 else if (&Sem == &llvm::APFloat::IEEEquad)
752 FloatingLiteralBits.Semantics = IEEEquad;
753 else if (&Sem == &llvm::APFloat::PPCDoubleDouble)
754 FloatingLiteralBits.Semantics = PPCDoubleDouble;
756 llvm_unreachable("Unknown floating semantics");
759 /// getValueAsApproximateDouble - This returns the value as an inaccurate
760 /// double. Note that this may cause loss of precision, but is useful for
761 /// debugging dumps, etc.
762 double FloatingLiteral::getValueAsApproximateDouble() const {
763 llvm::APFloat V = getValue();
765 V.convert(llvm::APFloat::IEEEdouble, llvm::APFloat::rmNearestTiesToEven,
767 return V.convertToDouble();
770 int StringLiteral::mapCharByteWidth(TargetInfo const &target,StringKind k) {
771 int CharByteWidth = 0;
775 CharByteWidth = target.getCharWidth();
778 CharByteWidth = target.getWCharWidth();
781 CharByteWidth = target.getChar16Width();
784 CharByteWidth = target.getChar32Width();
787 assert((CharByteWidth & 7) == 0 && "Assumes character size is byte multiple");
789 assert((CharByteWidth==1 || CharByteWidth==2 || CharByteWidth==4)
790 && "character byte widths supported are 1, 2, and 4 only");
791 return CharByteWidth;
794 StringLiteral *StringLiteral::Create(const ASTContext &C, StringRef Str,
795 StringKind Kind, bool Pascal, QualType Ty,
796 const SourceLocation *Loc,
798 assert(C.getAsConstantArrayType(Ty) &&
799 "StringLiteral must be of constant array type!");
801 // Allocate enough space for the StringLiteral plus an array of locations for
802 // any concatenated string tokens.
803 void *Mem = C.Allocate(sizeof(StringLiteral)+
804 sizeof(SourceLocation)*(NumStrs-1),
805 llvm::alignOf<StringLiteral>());
806 StringLiteral *SL = new (Mem) StringLiteral(Ty);
808 // OPTIMIZE: could allocate this appended to the StringLiteral.
809 SL->setString(C,Str,Kind,Pascal);
811 SL->TokLocs[0] = Loc[0];
812 SL->NumConcatenated = NumStrs;
815 memcpy(&SL->TokLocs[1], Loc+1, sizeof(SourceLocation)*(NumStrs-1));
819 StringLiteral *StringLiteral::CreateEmpty(const ASTContext &C,
821 void *Mem = C.Allocate(sizeof(StringLiteral)+
822 sizeof(SourceLocation)*(NumStrs-1),
823 llvm::alignOf<StringLiteral>());
824 StringLiteral *SL = new (Mem) StringLiteral(QualType());
825 SL->CharByteWidth = 0;
827 SL->NumConcatenated = NumStrs;
831 void StringLiteral::outputString(raw_ostream &OS) const {
833 case Ascii: break; // no prefix.
834 case Wide: OS << 'L'; break;
835 case UTF8: OS << "u8"; break;
836 case UTF16: OS << 'u'; break;
837 case UTF32: OS << 'U'; break;
840 static const char Hex[] = "0123456789ABCDEF";
842 unsigned LastSlashX = getLength();
843 for (unsigned I = 0, N = getLength(); I != N; ++I) {
844 switch (uint32_t Char = getCodeUnit(I)) {
846 // FIXME: Convert UTF-8 back to codepoints before rendering.
848 // Convert UTF-16 surrogate pairs back to codepoints before rendering.
849 // Leave invalid surrogates alone; we'll use \x for those.
850 if (getKind() == UTF16 && I != N - 1 && Char >= 0xd800 &&
852 uint32_t Trail = getCodeUnit(I + 1);
853 if (Trail >= 0xdc00 && Trail <= 0xdfff) {
854 Char = 0x10000 + ((Char - 0xd800) << 10) + (Trail - 0xdc00);
860 // If this is a wide string, output characters over 0xff using \x
861 // escapes. Otherwise, this is a UTF-16 or UTF-32 string, and Char is a
862 // codepoint: use \x escapes for invalid codepoints.
863 if (getKind() == Wide ||
864 (Char >= 0xd800 && Char <= 0xdfff) || Char >= 0x110000) {
865 // FIXME: Is this the best way to print wchar_t?
868 while ((Char >> Shift) == 0)
870 for (/**/; Shift >= 0; Shift -= 4)
871 OS << Hex[(Char >> Shift) & 15];
878 << Hex[(Char >> 20) & 15]
879 << Hex[(Char >> 16) & 15];
882 OS << Hex[(Char >> 12) & 15]
883 << Hex[(Char >> 8) & 15]
884 << Hex[(Char >> 4) & 15]
885 << Hex[(Char >> 0) & 15];
889 // If we used \x... for the previous character, and this character is a
890 // hexadecimal digit, prevent it being slurped as part of the \x.
891 if (LastSlashX + 1 == I) {
893 case '0': case '1': case '2': case '3': case '4':
894 case '5': case '6': case '7': case '8': case '9':
895 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
896 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
901 assert(Char <= 0xff &&
902 "Characters above 0xff should already have been handled.");
904 if (isPrintable(Char))
906 else // Output anything hard as an octal escape.
908 << (char)('0' + ((Char >> 6) & 7))
909 << (char)('0' + ((Char >> 3) & 7))
910 << (char)('0' + ((Char >> 0) & 7));
912 // Handle some common non-printable cases to make dumps prettier.
913 case '\\': OS << "\\\\"; break;
914 case '"': OS << "\\\""; break;
915 case '\n': OS << "\\n"; break;
916 case '\t': OS << "\\t"; break;
917 case '\a': OS << "\\a"; break;
918 case '\b': OS << "\\b"; break;
924 void StringLiteral::setString(const ASTContext &C, StringRef Str,
925 StringKind Kind, bool IsPascal) {
926 //FIXME: we assume that the string data comes from a target that uses the same
927 // code unit size and endianess for the type of string.
929 this->IsPascal = IsPascal;
931 CharByteWidth = mapCharByteWidth(C.getTargetInfo(),Kind);
932 assert((Str.size()%CharByteWidth == 0)
933 && "size of data must be multiple of CharByteWidth");
934 Length = Str.size()/CharByteWidth;
936 switch(CharByteWidth) {
938 char *AStrData = new (C) char[Length];
939 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
940 StrData.asChar = AStrData;
944 uint16_t *AStrData = new (C) uint16_t[Length];
945 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
946 StrData.asUInt16 = AStrData;
950 uint32_t *AStrData = new (C) uint32_t[Length];
951 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
952 StrData.asUInt32 = AStrData;
956 assert(false && "unsupported CharByteWidth");
960 /// getLocationOfByte - Return a source location that points to the specified
961 /// byte of this string literal.
963 /// Strings are amazingly complex. They can be formed from multiple tokens and
964 /// can have escape sequences in them in addition to the usual trigraph and
965 /// escaped newline business. This routine handles this complexity.
967 SourceLocation StringLiteral::
968 getLocationOfByte(unsigned ByteNo, const SourceManager &SM,
969 const LangOptions &Features, const TargetInfo &Target) const {
970 assert((Kind == StringLiteral::Ascii || Kind == StringLiteral::UTF8) &&
971 "Only narrow string literals are currently supported");
973 // Loop over all of the tokens in this string until we find the one that
974 // contains the byte we're looking for.
977 assert(TokNo < getNumConcatenated() && "Invalid byte number!");
978 SourceLocation StrTokLoc = getStrTokenLoc(TokNo);
980 // Get the spelling of the string so that we can get the data that makes up
981 // the string literal, not the identifier for the macro it is potentially
983 SourceLocation StrTokSpellingLoc = SM.getSpellingLoc(StrTokLoc);
985 // Re-lex the token to get its length and original spelling.
986 std::pair<FileID, unsigned> LocInfo =SM.getDecomposedLoc(StrTokSpellingLoc);
987 bool Invalid = false;
988 StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid);
990 return StrTokSpellingLoc;
992 const char *StrData = Buffer.data()+LocInfo.second;
994 // Create a lexer starting at the beginning of this token.
995 Lexer TheLexer(SM.getLocForStartOfFile(LocInfo.first), Features,
996 Buffer.begin(), StrData, Buffer.end());
998 TheLexer.LexFromRawLexer(TheTok);
1000 // Use the StringLiteralParser to compute the length of the string in bytes.
1001 StringLiteralParser SLP(&TheTok, 1, SM, Features, Target);
1002 unsigned TokNumBytes = SLP.GetStringLength();
1004 // If the byte is in this token, return the location of the byte.
1005 if (ByteNo < TokNumBytes ||
1006 (ByteNo == TokNumBytes && TokNo == getNumConcatenated() - 1)) {
1007 unsigned Offset = SLP.getOffsetOfStringByte(TheTok, ByteNo);
1009 // Now that we know the offset of the token in the spelling, use the
1010 // preprocessor to get the offset in the original source.
1011 return Lexer::AdvanceToTokenCharacter(StrTokLoc, Offset, SM, Features);
1014 // Move to the next string token.
1016 ByteNo -= TokNumBytes;
1022 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1023 /// corresponds to, e.g. "sizeof" or "[pre]++".
1024 StringRef UnaryOperator::getOpcodeStr(Opcode Op) {
1026 case UO_PostInc: return "++";
1027 case UO_PostDec: return "--";
1028 case UO_PreInc: return "++";
1029 case UO_PreDec: return "--";
1030 case UO_AddrOf: return "&";
1031 case UO_Deref: return "*";
1032 case UO_Plus: return "+";
1033 case UO_Minus: return "-";
1034 case UO_Not: return "~";
1035 case UO_LNot: return "!";
1036 case UO_Real: return "__real";
1037 case UO_Imag: return "__imag";
1038 case UO_Extension: return "__extension__";
1040 llvm_unreachable("Unknown unary operator");
1044 UnaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix) {
1046 default: llvm_unreachable("No unary operator for overloaded function");
1047 case OO_PlusPlus: return Postfix ? UO_PostInc : UO_PreInc;
1048 case OO_MinusMinus: return Postfix ? UO_PostDec : UO_PreDec;
1049 case OO_Amp: return UO_AddrOf;
1050 case OO_Star: return UO_Deref;
1051 case OO_Plus: return UO_Plus;
1052 case OO_Minus: return UO_Minus;
1053 case OO_Tilde: return UO_Not;
1054 case OO_Exclaim: return UO_LNot;
1058 OverloadedOperatorKind UnaryOperator::getOverloadedOperator(Opcode Opc) {
1060 case UO_PostInc: case UO_PreInc: return OO_PlusPlus;
1061 case UO_PostDec: case UO_PreDec: return OO_MinusMinus;
1062 case UO_AddrOf: return OO_Amp;
1063 case UO_Deref: return OO_Star;
1064 case UO_Plus: return OO_Plus;
1065 case UO_Minus: return OO_Minus;
1066 case UO_Not: return OO_Tilde;
1067 case UO_LNot: return OO_Exclaim;
1068 default: return OO_None;
1073 //===----------------------------------------------------------------------===//
1074 // Postfix Operators.
1075 //===----------------------------------------------------------------------===//
1077 CallExpr::CallExpr(const ASTContext& C, StmtClass SC, Expr *fn,
1078 unsigned NumPreArgs, ArrayRef<Expr*> args, QualType t,
1079 ExprValueKind VK, SourceLocation rparenloc)
1080 : Expr(SC, t, VK, OK_Ordinary,
1081 fn->isTypeDependent(),
1082 fn->isValueDependent(),
1083 fn->isInstantiationDependent(),
1084 fn->containsUnexpandedParameterPack()),
1085 NumArgs(args.size()) {
1087 SubExprs = new (C) Stmt*[args.size()+PREARGS_START+NumPreArgs];
1089 for (unsigned i = 0; i != args.size(); ++i) {
1090 if (args[i]->isTypeDependent())
1091 ExprBits.TypeDependent = true;
1092 if (args[i]->isValueDependent())
1093 ExprBits.ValueDependent = true;
1094 if (args[i]->isInstantiationDependent())
1095 ExprBits.InstantiationDependent = true;
1096 if (args[i]->containsUnexpandedParameterPack())
1097 ExprBits.ContainsUnexpandedParameterPack = true;
1099 SubExprs[i+PREARGS_START+NumPreArgs] = args[i];
1102 CallExprBits.NumPreArgs = NumPreArgs;
1103 RParenLoc = rparenloc;
1106 CallExpr::CallExpr(const ASTContext& C, Expr *fn, ArrayRef<Expr*> args,
1107 QualType t, ExprValueKind VK, SourceLocation rparenloc)
1108 : Expr(CallExprClass, t, VK, OK_Ordinary,
1109 fn->isTypeDependent(),
1110 fn->isValueDependent(),
1111 fn->isInstantiationDependent(),
1112 fn->containsUnexpandedParameterPack()),
1113 NumArgs(args.size()) {
1115 SubExprs = new (C) Stmt*[args.size()+PREARGS_START];
1117 for (unsigned i = 0; i != args.size(); ++i) {
1118 if (args[i]->isTypeDependent())
1119 ExprBits.TypeDependent = true;
1120 if (args[i]->isValueDependent())
1121 ExprBits.ValueDependent = true;
1122 if (args[i]->isInstantiationDependent())
1123 ExprBits.InstantiationDependent = true;
1124 if (args[i]->containsUnexpandedParameterPack())
1125 ExprBits.ContainsUnexpandedParameterPack = true;
1127 SubExprs[i+PREARGS_START] = args[i];
1130 CallExprBits.NumPreArgs = 0;
1131 RParenLoc = rparenloc;
1134 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, EmptyShell Empty)
1135 : Expr(SC, Empty), SubExprs(nullptr), NumArgs(0) {
1136 // FIXME: Why do we allocate this?
1137 SubExprs = new (C) Stmt*[PREARGS_START];
1138 CallExprBits.NumPreArgs = 0;
1141 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, unsigned NumPreArgs,
1143 : Expr(SC, Empty), SubExprs(nullptr), NumArgs(0) {
1144 // FIXME: Why do we allocate this?
1145 SubExprs = new (C) Stmt*[PREARGS_START+NumPreArgs];
1146 CallExprBits.NumPreArgs = NumPreArgs;
1149 Decl *CallExpr::getCalleeDecl() {
1150 Expr *CEE = getCallee()->IgnoreParenImpCasts();
1152 while (SubstNonTypeTemplateParmExpr *NTTP
1153 = dyn_cast<SubstNonTypeTemplateParmExpr>(CEE)) {
1154 CEE = NTTP->getReplacement()->IgnoreParenCasts();
1157 // If we're calling a dereference, look at the pointer instead.
1158 if (BinaryOperator *BO = dyn_cast<BinaryOperator>(CEE)) {
1159 if (BO->isPtrMemOp())
1160 CEE = BO->getRHS()->IgnoreParenCasts();
1161 } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(CEE)) {
1162 if (UO->getOpcode() == UO_Deref)
1163 CEE = UO->getSubExpr()->IgnoreParenCasts();
1165 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE))
1166 return DRE->getDecl();
1167 if (MemberExpr *ME = dyn_cast<MemberExpr>(CEE))
1168 return ME->getMemberDecl();
1173 FunctionDecl *CallExpr::getDirectCallee() {
1174 return dyn_cast_or_null<FunctionDecl>(getCalleeDecl());
1177 /// setNumArgs - This changes the number of arguments present in this call.
1178 /// Any orphaned expressions are deleted by this, and any new operands are set
1180 void CallExpr::setNumArgs(const ASTContext& C, unsigned NumArgs) {
1181 // No change, just return.
1182 if (NumArgs == getNumArgs()) return;
1184 // If shrinking # arguments, just delete the extras and forgot them.
1185 if (NumArgs < getNumArgs()) {
1186 this->NumArgs = NumArgs;
1190 // Otherwise, we are growing the # arguments. New an bigger argument array.
1191 unsigned NumPreArgs = getNumPreArgs();
1192 Stmt **NewSubExprs = new (C) Stmt*[NumArgs+PREARGS_START+NumPreArgs];
1194 for (unsigned i = 0; i != getNumArgs()+PREARGS_START+NumPreArgs; ++i)
1195 NewSubExprs[i] = SubExprs[i];
1196 // Null out new args.
1197 for (unsigned i = getNumArgs()+PREARGS_START+NumPreArgs;
1198 i != NumArgs+PREARGS_START+NumPreArgs; ++i)
1199 NewSubExprs[i] = nullptr;
1201 if (SubExprs) C.Deallocate(SubExprs);
1202 SubExprs = NewSubExprs;
1203 this->NumArgs = NumArgs;
1206 /// getBuiltinCallee - If this is a call to a builtin, return the builtin ID. If
1208 unsigned CallExpr::getBuiltinCallee() const {
1209 // All simple function calls (e.g. func()) are implicitly cast to pointer to
1210 // function. As a result, we try and obtain the DeclRefExpr from the
1211 // ImplicitCastExpr.
1212 const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee());
1213 if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()).
1216 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr());
1220 const FunctionDecl *FDecl = dyn_cast<FunctionDecl>(DRE->getDecl());
1224 if (!FDecl->getIdentifier())
1227 return FDecl->getBuiltinID();
1230 bool CallExpr::isUnevaluatedBuiltinCall(ASTContext &Ctx) const {
1231 if (unsigned BI = getBuiltinCallee())
1232 return Ctx.BuiltinInfo.isUnevaluated(BI);
1236 QualType CallExpr::getCallReturnType() const {
1237 QualType CalleeType = getCallee()->getType();
1238 if (const PointerType *FnTypePtr = CalleeType->getAs<PointerType>())
1239 CalleeType = FnTypePtr->getPointeeType();
1240 else if (const BlockPointerType *BPT = CalleeType->getAs<BlockPointerType>())
1241 CalleeType = BPT->getPointeeType();
1242 else if (CalleeType->isSpecificPlaceholderType(BuiltinType::BoundMember))
1243 // This should never be overloaded and so should never return null.
1244 CalleeType = Expr::findBoundMemberType(getCallee());
1246 const FunctionType *FnType = CalleeType->castAs<FunctionType>();
1247 return FnType->getReturnType();
1250 SourceLocation CallExpr::getLocStart() const {
1251 if (isa<CXXOperatorCallExpr>(this))
1252 return cast<CXXOperatorCallExpr>(this)->getLocStart();
1254 SourceLocation begin = getCallee()->getLocStart();
1255 if (begin.isInvalid() && getNumArgs() > 0)
1256 begin = getArg(0)->getLocStart();
1259 SourceLocation CallExpr::getLocEnd() const {
1260 if (isa<CXXOperatorCallExpr>(this))
1261 return cast<CXXOperatorCallExpr>(this)->getLocEnd();
1263 SourceLocation end = getRParenLoc();
1264 if (end.isInvalid() && getNumArgs() > 0)
1265 end = getArg(getNumArgs() - 1)->getLocEnd();
1269 OffsetOfExpr *OffsetOfExpr::Create(const ASTContext &C, QualType type,
1270 SourceLocation OperatorLoc,
1271 TypeSourceInfo *tsi,
1272 ArrayRef<OffsetOfNode> comps,
1273 ArrayRef<Expr*> exprs,
1274 SourceLocation RParenLoc) {
1275 void *Mem = C.Allocate(sizeof(OffsetOfExpr) +
1276 sizeof(OffsetOfNode) * comps.size() +
1277 sizeof(Expr*) * exprs.size());
1279 return new (Mem) OffsetOfExpr(C, type, OperatorLoc, tsi, comps, exprs,
1283 OffsetOfExpr *OffsetOfExpr::CreateEmpty(const ASTContext &C,
1284 unsigned numComps, unsigned numExprs) {
1285 void *Mem = C.Allocate(sizeof(OffsetOfExpr) +
1286 sizeof(OffsetOfNode) * numComps +
1287 sizeof(Expr*) * numExprs);
1288 return new (Mem) OffsetOfExpr(numComps, numExprs);
1291 OffsetOfExpr::OffsetOfExpr(const ASTContext &C, QualType type,
1292 SourceLocation OperatorLoc, TypeSourceInfo *tsi,
1293 ArrayRef<OffsetOfNode> comps, ArrayRef<Expr*> exprs,
1294 SourceLocation RParenLoc)
1295 : Expr(OffsetOfExprClass, type, VK_RValue, OK_Ordinary,
1296 /*TypeDependent=*/false,
1297 /*ValueDependent=*/tsi->getType()->isDependentType(),
1298 tsi->getType()->isInstantiationDependentType(),
1299 tsi->getType()->containsUnexpandedParameterPack()),
1300 OperatorLoc(OperatorLoc), RParenLoc(RParenLoc), TSInfo(tsi),
1301 NumComps(comps.size()), NumExprs(exprs.size())
1303 for (unsigned i = 0; i != comps.size(); ++i) {
1304 setComponent(i, comps[i]);
1307 for (unsigned i = 0; i != exprs.size(); ++i) {
1308 if (exprs[i]->isTypeDependent() || exprs[i]->isValueDependent())
1309 ExprBits.ValueDependent = true;
1310 if (exprs[i]->containsUnexpandedParameterPack())
1311 ExprBits.ContainsUnexpandedParameterPack = true;
1313 setIndexExpr(i, exprs[i]);
1317 IdentifierInfo *OffsetOfExpr::OffsetOfNode::getFieldName() const {
1318 assert(getKind() == Field || getKind() == Identifier);
1319 if (getKind() == Field)
1320 return getField()->getIdentifier();
1322 return reinterpret_cast<IdentifierInfo *> (Data & ~(uintptr_t)Mask);
1325 MemberExpr *MemberExpr::Create(const ASTContext &C, Expr *base, bool isarrow,
1326 NestedNameSpecifierLoc QualifierLoc,
1327 SourceLocation TemplateKWLoc,
1328 ValueDecl *memberdecl,
1329 DeclAccessPair founddecl,
1330 DeclarationNameInfo nameinfo,
1331 const TemplateArgumentListInfo *targs,
1334 ExprObjectKind ok) {
1335 std::size_t Size = sizeof(MemberExpr);
1337 bool hasQualOrFound = (QualifierLoc ||
1338 founddecl.getDecl() != memberdecl ||
1339 founddecl.getAccess() != memberdecl->getAccess());
1341 Size += sizeof(MemberNameQualifier);
1344 Size += ASTTemplateKWAndArgsInfo::sizeFor(targs->size());
1345 else if (TemplateKWLoc.isValid())
1346 Size += ASTTemplateKWAndArgsInfo::sizeFor(0);
1348 void *Mem = C.Allocate(Size, llvm::alignOf<MemberExpr>());
1349 MemberExpr *E = new (Mem) MemberExpr(base, isarrow, memberdecl, nameinfo,
1352 if (hasQualOrFound) {
1353 // FIXME: Wrong. We should be looking at the member declaration we found.
1354 if (QualifierLoc && QualifierLoc.getNestedNameSpecifier()->isDependent()) {
1355 E->setValueDependent(true);
1356 E->setTypeDependent(true);
1357 E->setInstantiationDependent(true);
1359 else if (QualifierLoc &&
1360 QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent())
1361 E->setInstantiationDependent(true);
1363 E->HasQualifierOrFoundDecl = true;
1365 MemberNameQualifier *NQ = E->getMemberQualifier();
1366 NQ->QualifierLoc = QualifierLoc;
1367 NQ->FoundDecl = founddecl;
1370 E->HasTemplateKWAndArgsInfo = (targs || TemplateKWLoc.isValid());
1373 bool Dependent = false;
1374 bool InstantiationDependent = false;
1375 bool ContainsUnexpandedParameterPack = false;
1376 E->getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc, *targs,
1378 InstantiationDependent,
1379 ContainsUnexpandedParameterPack);
1380 if (InstantiationDependent)
1381 E->setInstantiationDependent(true);
1382 } else if (TemplateKWLoc.isValid()) {
1383 E->getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc);
1389 SourceLocation MemberExpr::getLocStart() const {
1390 if (isImplicitAccess()) {
1392 return getQualifierLoc().getBeginLoc();
1396 // FIXME: We don't want this to happen. Rather, we should be able to
1397 // detect all kinds of implicit accesses more cleanly.
1398 SourceLocation BaseStartLoc = getBase()->getLocStart();
1399 if (BaseStartLoc.isValid())
1400 return BaseStartLoc;
1403 SourceLocation MemberExpr::getLocEnd() const {
1404 SourceLocation EndLoc = getMemberNameInfo().getEndLoc();
1405 if (hasExplicitTemplateArgs())
1406 EndLoc = getRAngleLoc();
1407 else if (EndLoc.isInvalid())
1408 EndLoc = getBase()->getLocEnd();
1412 bool CastExpr::CastConsistency() const {
1413 switch (getCastKind()) {
1414 case CK_DerivedToBase:
1415 case CK_UncheckedDerivedToBase:
1416 case CK_DerivedToBaseMemberPointer:
1417 case CK_BaseToDerived:
1418 case CK_BaseToDerivedMemberPointer:
1419 assert(!path_empty() && "Cast kind should have a base path!");
1422 case CK_CPointerToObjCPointerCast:
1423 assert(getType()->isObjCObjectPointerType());
1424 assert(getSubExpr()->getType()->isPointerType());
1425 goto CheckNoBasePath;
1427 case CK_BlockPointerToObjCPointerCast:
1428 assert(getType()->isObjCObjectPointerType());
1429 assert(getSubExpr()->getType()->isBlockPointerType());
1430 goto CheckNoBasePath;
1432 case CK_ReinterpretMemberPointer:
1433 assert(getType()->isMemberPointerType());
1434 assert(getSubExpr()->getType()->isMemberPointerType());
1435 goto CheckNoBasePath;
1438 // Arbitrary casts to C pointer types count as bitcasts.
1439 // Otherwise, we should only have block and ObjC pointer casts
1440 // here if they stay within the type kind.
1441 if (!getType()->isPointerType()) {
1442 assert(getType()->isObjCObjectPointerType() ==
1443 getSubExpr()->getType()->isObjCObjectPointerType());
1444 assert(getType()->isBlockPointerType() ==
1445 getSubExpr()->getType()->isBlockPointerType());
1447 goto CheckNoBasePath;
1449 case CK_AnyPointerToBlockPointerCast:
1450 assert(getType()->isBlockPointerType());
1451 assert(getSubExpr()->getType()->isAnyPointerType() &&
1452 !getSubExpr()->getType()->isBlockPointerType());
1453 goto CheckNoBasePath;
1455 case CK_CopyAndAutoreleaseBlockObject:
1456 assert(getType()->isBlockPointerType());
1457 assert(getSubExpr()->getType()->isBlockPointerType());
1458 goto CheckNoBasePath;
1460 case CK_FunctionToPointerDecay:
1461 assert(getType()->isPointerType());
1462 assert(getSubExpr()->getType()->isFunctionType());
1463 goto CheckNoBasePath;
1465 case CK_AddressSpaceConversion:
1466 assert(getType()->isPointerType());
1467 assert(getSubExpr()->getType()->isPointerType());
1468 assert(getType()->getPointeeType().getAddressSpace() !=
1469 getSubExpr()->getType()->getPointeeType().getAddressSpace());
1470 // These should not have an inheritance path.
1473 case CK_ArrayToPointerDecay:
1474 case CK_NullToMemberPointer:
1475 case CK_NullToPointer:
1476 case CK_ConstructorConversion:
1477 case CK_IntegralToPointer:
1478 case CK_PointerToIntegral:
1480 case CK_VectorSplat:
1481 case CK_IntegralCast:
1482 case CK_IntegralToFloating:
1483 case CK_FloatingToIntegral:
1484 case CK_FloatingCast:
1485 case CK_ObjCObjectLValueCast:
1486 case CK_FloatingRealToComplex:
1487 case CK_FloatingComplexToReal:
1488 case CK_FloatingComplexCast:
1489 case CK_FloatingComplexToIntegralComplex:
1490 case CK_IntegralRealToComplex:
1491 case CK_IntegralComplexToReal:
1492 case CK_IntegralComplexCast:
1493 case CK_IntegralComplexToFloatingComplex:
1494 case CK_ARCProduceObject:
1495 case CK_ARCConsumeObject:
1496 case CK_ARCReclaimReturnedObject:
1497 case CK_ARCExtendBlockObject:
1498 case CK_ZeroToOCLEvent:
1499 assert(!getType()->isBooleanType() && "unheralded conversion to bool");
1500 goto CheckNoBasePath;
1503 case CK_LValueToRValue:
1505 case CK_AtomicToNonAtomic:
1506 case CK_NonAtomicToAtomic:
1507 case CK_PointerToBoolean:
1508 case CK_IntegralToBoolean:
1509 case CK_FloatingToBoolean:
1510 case CK_MemberPointerToBoolean:
1511 case CK_FloatingComplexToBoolean:
1512 case CK_IntegralComplexToBoolean:
1513 case CK_LValueBitCast: // -> bool&
1514 case CK_UserDefinedConversion: // operator bool()
1515 case CK_BuiltinFnToFnPtr:
1517 assert(path_empty() && "Cast kind should not have a base path!");
1523 const char *CastExpr::getCastKindName() const {
1524 switch (getCastKind()) {
1529 case CK_LValueBitCast:
1530 return "LValueBitCast";
1531 case CK_LValueToRValue:
1532 return "LValueToRValue";
1535 case CK_BaseToDerived:
1536 return "BaseToDerived";
1537 case CK_DerivedToBase:
1538 return "DerivedToBase";
1539 case CK_UncheckedDerivedToBase:
1540 return "UncheckedDerivedToBase";
1545 case CK_ArrayToPointerDecay:
1546 return "ArrayToPointerDecay";
1547 case CK_FunctionToPointerDecay:
1548 return "FunctionToPointerDecay";
1549 case CK_NullToMemberPointer:
1550 return "NullToMemberPointer";
1551 case CK_NullToPointer:
1552 return "NullToPointer";
1553 case CK_BaseToDerivedMemberPointer:
1554 return "BaseToDerivedMemberPointer";
1555 case CK_DerivedToBaseMemberPointer:
1556 return "DerivedToBaseMemberPointer";
1557 case CK_ReinterpretMemberPointer:
1558 return "ReinterpretMemberPointer";
1559 case CK_UserDefinedConversion:
1560 return "UserDefinedConversion";
1561 case CK_ConstructorConversion:
1562 return "ConstructorConversion";
1563 case CK_IntegralToPointer:
1564 return "IntegralToPointer";
1565 case CK_PointerToIntegral:
1566 return "PointerToIntegral";
1567 case CK_PointerToBoolean:
1568 return "PointerToBoolean";
1571 case CK_VectorSplat:
1572 return "VectorSplat";
1573 case CK_IntegralCast:
1574 return "IntegralCast";
1575 case CK_IntegralToBoolean:
1576 return "IntegralToBoolean";
1577 case CK_IntegralToFloating:
1578 return "IntegralToFloating";
1579 case CK_FloatingToIntegral:
1580 return "FloatingToIntegral";
1581 case CK_FloatingCast:
1582 return "FloatingCast";
1583 case CK_FloatingToBoolean:
1584 return "FloatingToBoolean";
1585 case CK_MemberPointerToBoolean:
1586 return "MemberPointerToBoolean";
1587 case CK_CPointerToObjCPointerCast:
1588 return "CPointerToObjCPointerCast";
1589 case CK_BlockPointerToObjCPointerCast:
1590 return "BlockPointerToObjCPointerCast";
1591 case CK_AnyPointerToBlockPointerCast:
1592 return "AnyPointerToBlockPointerCast";
1593 case CK_ObjCObjectLValueCast:
1594 return "ObjCObjectLValueCast";
1595 case CK_FloatingRealToComplex:
1596 return "FloatingRealToComplex";
1597 case CK_FloatingComplexToReal:
1598 return "FloatingComplexToReal";
1599 case CK_FloatingComplexToBoolean:
1600 return "FloatingComplexToBoolean";
1601 case CK_FloatingComplexCast:
1602 return "FloatingComplexCast";
1603 case CK_FloatingComplexToIntegralComplex:
1604 return "FloatingComplexToIntegralComplex";
1605 case CK_IntegralRealToComplex:
1606 return "IntegralRealToComplex";
1607 case CK_IntegralComplexToReal:
1608 return "IntegralComplexToReal";
1609 case CK_IntegralComplexToBoolean:
1610 return "IntegralComplexToBoolean";
1611 case CK_IntegralComplexCast:
1612 return "IntegralComplexCast";
1613 case CK_IntegralComplexToFloatingComplex:
1614 return "IntegralComplexToFloatingComplex";
1615 case CK_ARCConsumeObject:
1616 return "ARCConsumeObject";
1617 case CK_ARCProduceObject:
1618 return "ARCProduceObject";
1619 case CK_ARCReclaimReturnedObject:
1620 return "ARCReclaimReturnedObject";
1621 case CK_ARCExtendBlockObject:
1622 return "ARCExtendBlockObject";
1623 case CK_AtomicToNonAtomic:
1624 return "AtomicToNonAtomic";
1625 case CK_NonAtomicToAtomic:
1626 return "NonAtomicToAtomic";
1627 case CK_CopyAndAutoreleaseBlockObject:
1628 return "CopyAndAutoreleaseBlockObject";
1629 case CK_BuiltinFnToFnPtr:
1630 return "BuiltinFnToFnPtr";
1631 case CK_ZeroToOCLEvent:
1632 return "ZeroToOCLEvent";
1633 case CK_AddressSpaceConversion:
1634 return "AddressSpaceConversion";
1637 llvm_unreachable("Unhandled cast kind!");
1640 Expr *CastExpr::getSubExprAsWritten() {
1641 Expr *SubExpr = nullptr;
1644 SubExpr = E->getSubExpr();
1646 // Skip through reference binding to temporary.
1647 if (MaterializeTemporaryExpr *Materialize
1648 = dyn_cast<MaterializeTemporaryExpr>(SubExpr))
1649 SubExpr = Materialize->GetTemporaryExpr();
1651 // Skip any temporary bindings; they're implicit.
1652 if (CXXBindTemporaryExpr *Binder = dyn_cast<CXXBindTemporaryExpr>(SubExpr))
1653 SubExpr = Binder->getSubExpr();
1655 // Conversions by constructor and conversion functions have a
1656 // subexpression describing the call; strip it off.
1657 if (E->getCastKind() == CK_ConstructorConversion)
1658 SubExpr = cast<CXXConstructExpr>(SubExpr)->getArg(0);
1659 else if (E->getCastKind() == CK_UserDefinedConversion)
1660 SubExpr = cast<CXXMemberCallExpr>(SubExpr)->getImplicitObjectArgument();
1662 // If the subexpression we're left with is an implicit cast, look
1663 // through that, too.
1664 } while ((E = dyn_cast<ImplicitCastExpr>(SubExpr)));
1669 CXXBaseSpecifier **CastExpr::path_buffer() {
1670 switch (getStmtClass()) {
1671 #define ABSTRACT_STMT(x)
1672 #define CASTEXPR(Type, Base) \
1673 case Stmt::Type##Class: \
1674 return reinterpret_cast<CXXBaseSpecifier**>(static_cast<Type*>(this)+1);
1675 #define STMT(Type, Base)
1676 #include "clang/AST/StmtNodes.inc"
1678 llvm_unreachable("non-cast expressions not possible here");
1682 void CastExpr::setCastPath(const CXXCastPath &Path) {
1683 assert(Path.size() == path_size());
1684 memcpy(path_buffer(), Path.data(), Path.size() * sizeof(CXXBaseSpecifier*));
1687 ImplicitCastExpr *ImplicitCastExpr::Create(const ASTContext &C, QualType T,
1688 CastKind Kind, Expr *Operand,
1689 const CXXCastPath *BasePath,
1691 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1693 C.Allocate(sizeof(ImplicitCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1694 ImplicitCastExpr *E =
1695 new (Buffer) ImplicitCastExpr(T, Kind, Operand, PathSize, VK);
1696 if (PathSize) E->setCastPath(*BasePath);
1700 ImplicitCastExpr *ImplicitCastExpr::CreateEmpty(const ASTContext &C,
1701 unsigned PathSize) {
1703 C.Allocate(sizeof(ImplicitCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1704 return new (Buffer) ImplicitCastExpr(EmptyShell(), PathSize);
1708 CStyleCastExpr *CStyleCastExpr::Create(const ASTContext &C, QualType T,
1709 ExprValueKind VK, CastKind K, Expr *Op,
1710 const CXXCastPath *BasePath,
1711 TypeSourceInfo *WrittenTy,
1712 SourceLocation L, SourceLocation R) {
1713 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1715 C.Allocate(sizeof(CStyleCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1717 new (Buffer) CStyleCastExpr(T, VK, K, Op, PathSize, WrittenTy, L, R);
1718 if (PathSize) E->setCastPath(*BasePath);
1722 CStyleCastExpr *CStyleCastExpr::CreateEmpty(const ASTContext &C,
1723 unsigned PathSize) {
1725 C.Allocate(sizeof(CStyleCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1726 return new (Buffer) CStyleCastExpr(EmptyShell(), PathSize);
1729 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1730 /// corresponds to, e.g. "<<=".
1731 StringRef BinaryOperator::getOpcodeStr(Opcode Op) {
1733 case BO_PtrMemD: return ".*";
1734 case BO_PtrMemI: return "->*";
1735 case BO_Mul: return "*";
1736 case BO_Div: return "/";
1737 case BO_Rem: return "%";
1738 case BO_Add: return "+";
1739 case BO_Sub: return "-";
1740 case BO_Shl: return "<<";
1741 case BO_Shr: return ">>";
1742 case BO_LT: return "<";
1743 case BO_GT: return ">";
1744 case BO_LE: return "<=";
1745 case BO_GE: return ">=";
1746 case BO_EQ: return "==";
1747 case BO_NE: return "!=";
1748 case BO_And: return "&";
1749 case BO_Xor: return "^";
1750 case BO_Or: return "|";
1751 case BO_LAnd: return "&&";
1752 case BO_LOr: return "||";
1753 case BO_Assign: return "=";
1754 case BO_MulAssign: return "*=";
1755 case BO_DivAssign: return "/=";
1756 case BO_RemAssign: return "%=";
1757 case BO_AddAssign: return "+=";
1758 case BO_SubAssign: return "-=";
1759 case BO_ShlAssign: return "<<=";
1760 case BO_ShrAssign: return ">>=";
1761 case BO_AndAssign: return "&=";
1762 case BO_XorAssign: return "^=";
1763 case BO_OrAssign: return "|=";
1764 case BO_Comma: return ",";
1767 llvm_unreachable("Invalid OpCode!");
1771 BinaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO) {
1773 default: llvm_unreachable("Not an overloadable binary operator");
1774 case OO_Plus: return BO_Add;
1775 case OO_Minus: return BO_Sub;
1776 case OO_Star: return BO_Mul;
1777 case OO_Slash: return BO_Div;
1778 case OO_Percent: return BO_Rem;
1779 case OO_Caret: return BO_Xor;
1780 case OO_Amp: return BO_And;
1781 case OO_Pipe: return BO_Or;
1782 case OO_Equal: return BO_Assign;
1783 case OO_Less: return BO_LT;
1784 case OO_Greater: return BO_GT;
1785 case OO_PlusEqual: return BO_AddAssign;
1786 case OO_MinusEqual: return BO_SubAssign;
1787 case OO_StarEqual: return BO_MulAssign;
1788 case OO_SlashEqual: return BO_DivAssign;
1789 case OO_PercentEqual: return BO_RemAssign;
1790 case OO_CaretEqual: return BO_XorAssign;
1791 case OO_AmpEqual: return BO_AndAssign;
1792 case OO_PipeEqual: return BO_OrAssign;
1793 case OO_LessLess: return BO_Shl;
1794 case OO_GreaterGreater: return BO_Shr;
1795 case OO_LessLessEqual: return BO_ShlAssign;
1796 case OO_GreaterGreaterEqual: return BO_ShrAssign;
1797 case OO_EqualEqual: return BO_EQ;
1798 case OO_ExclaimEqual: return BO_NE;
1799 case OO_LessEqual: return BO_LE;
1800 case OO_GreaterEqual: return BO_GE;
1801 case OO_AmpAmp: return BO_LAnd;
1802 case OO_PipePipe: return BO_LOr;
1803 case OO_Comma: return BO_Comma;
1804 case OO_ArrowStar: return BO_PtrMemI;
1808 OverloadedOperatorKind BinaryOperator::getOverloadedOperator(Opcode Opc) {
1809 static const OverloadedOperatorKind OverOps[] = {
1810 /* .* Cannot be overloaded */OO_None, OO_ArrowStar,
1811 OO_Star, OO_Slash, OO_Percent,
1813 OO_LessLess, OO_GreaterGreater,
1814 OO_Less, OO_Greater, OO_LessEqual, OO_GreaterEqual,
1815 OO_EqualEqual, OO_ExclaimEqual,
1821 OO_Equal, OO_StarEqual,
1822 OO_SlashEqual, OO_PercentEqual,
1823 OO_PlusEqual, OO_MinusEqual,
1824 OO_LessLessEqual, OO_GreaterGreaterEqual,
1825 OO_AmpEqual, OO_CaretEqual,
1829 return OverOps[Opc];
1832 InitListExpr::InitListExpr(const ASTContext &C, SourceLocation lbraceloc,
1833 ArrayRef<Expr*> initExprs, SourceLocation rbraceloc)
1834 : Expr(InitListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false,
1836 InitExprs(C, initExprs.size()),
1837 LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), AltForm(nullptr, true)
1839 sawArrayRangeDesignator(false);
1840 for (unsigned I = 0; I != initExprs.size(); ++I) {
1841 if (initExprs[I]->isTypeDependent())
1842 ExprBits.TypeDependent = true;
1843 if (initExprs[I]->isValueDependent())
1844 ExprBits.ValueDependent = true;
1845 if (initExprs[I]->isInstantiationDependent())
1846 ExprBits.InstantiationDependent = true;
1847 if (initExprs[I]->containsUnexpandedParameterPack())
1848 ExprBits.ContainsUnexpandedParameterPack = true;
1851 InitExprs.insert(C, InitExprs.end(), initExprs.begin(), initExprs.end());
1854 void InitListExpr::reserveInits(const ASTContext &C, unsigned NumInits) {
1855 if (NumInits > InitExprs.size())
1856 InitExprs.reserve(C, NumInits);
1859 void InitListExpr::resizeInits(const ASTContext &C, unsigned NumInits) {
1860 InitExprs.resize(C, NumInits, nullptr);
1863 Expr *InitListExpr::updateInit(const ASTContext &C, unsigned Init, Expr *expr) {
1864 if (Init >= InitExprs.size()) {
1865 InitExprs.insert(C, InitExprs.end(), Init - InitExprs.size() + 1, nullptr);
1866 setInit(Init, expr);
1870 Expr *Result = cast_or_null<Expr>(InitExprs[Init]);
1871 setInit(Init, expr);
1875 void InitListExpr::setArrayFiller(Expr *filler) {
1876 assert(!hasArrayFiller() && "Filler already set!");
1877 ArrayFillerOrUnionFieldInit = filler;
1878 // Fill out any "holes" in the array due to designated initializers.
1879 Expr **inits = getInits();
1880 for (unsigned i = 0, e = getNumInits(); i != e; ++i)
1881 if (inits[i] == nullptr)
1885 bool InitListExpr::isStringLiteralInit() const {
1886 if (getNumInits() != 1)
1888 const ArrayType *AT = getType()->getAsArrayTypeUnsafe();
1889 if (!AT || !AT->getElementType()->isIntegerType())
1891 // It is possible for getInit() to return null.
1892 const Expr *Init = getInit(0);
1895 Init = Init->IgnoreParens();
1896 return isa<StringLiteral>(Init) || isa<ObjCEncodeExpr>(Init);
1899 SourceLocation InitListExpr::getLocStart() const {
1900 if (InitListExpr *SyntacticForm = getSyntacticForm())
1901 return SyntacticForm->getLocStart();
1902 SourceLocation Beg = LBraceLoc;
1903 if (Beg.isInvalid()) {
1904 // Find the first non-null initializer.
1905 for (InitExprsTy::const_iterator I = InitExprs.begin(),
1906 E = InitExprs.end();
1909 Beg = S->getLocStart();
1917 SourceLocation InitListExpr::getLocEnd() const {
1918 if (InitListExpr *SyntacticForm = getSyntacticForm())
1919 return SyntacticForm->getLocEnd();
1920 SourceLocation End = RBraceLoc;
1921 if (End.isInvalid()) {
1922 // Find the first non-null initializer from the end.
1923 for (InitExprsTy::const_reverse_iterator I = InitExprs.rbegin(),
1924 E = InitExprs.rend();
1927 End = S->getLocEnd();
1935 /// getFunctionType - Return the underlying function type for this block.
1937 const FunctionProtoType *BlockExpr::getFunctionType() const {
1938 // The block pointer is never sugared, but the function type might be.
1939 return cast<BlockPointerType>(getType())
1940 ->getPointeeType()->castAs<FunctionProtoType>();
1943 SourceLocation BlockExpr::getCaretLocation() const {
1944 return TheBlock->getCaretLocation();
1946 const Stmt *BlockExpr::getBody() const {
1947 return TheBlock->getBody();
1949 Stmt *BlockExpr::getBody() {
1950 return TheBlock->getBody();
1954 //===----------------------------------------------------------------------===//
1955 // Generic Expression Routines
1956 //===----------------------------------------------------------------------===//
1958 /// isUnusedResultAWarning - Return true if this immediate expression should
1959 /// be warned about if the result is unused. If so, fill in Loc and Ranges
1960 /// with location to warn on and the source range[s] to report with the
1962 bool Expr::isUnusedResultAWarning(const Expr *&WarnE, SourceLocation &Loc,
1963 SourceRange &R1, SourceRange &R2,
1964 ASTContext &Ctx) const {
1965 // Don't warn if the expr is type dependent. The type could end up
1966 // instantiating to void.
1967 if (isTypeDependent())
1970 switch (getStmtClass()) {
1972 if (getType()->isVoidType())
1976 R1 = getSourceRange();
1978 case ParenExprClass:
1979 return cast<ParenExpr>(this)->getSubExpr()->
1980 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
1981 case GenericSelectionExprClass:
1982 return cast<GenericSelectionExpr>(this)->getResultExpr()->
1983 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
1984 case ChooseExprClass:
1985 return cast<ChooseExpr>(this)->getChosenSubExpr()->
1986 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
1987 case UnaryOperatorClass: {
1988 const UnaryOperator *UO = cast<UnaryOperator>(this);
1990 switch (UO->getOpcode()) {
2001 case UO_PreDec: // ++/--
2002 return false; // Not a warning.
2005 // accessing a piece of a volatile complex is a side-effect.
2006 if (Ctx.getCanonicalType(UO->getSubExpr()->getType())
2007 .isVolatileQualified())
2011 return UO->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2014 Loc = UO->getOperatorLoc();
2015 R1 = UO->getSubExpr()->getSourceRange();
2018 case BinaryOperatorClass: {
2019 const BinaryOperator *BO = cast<BinaryOperator>(this);
2020 switch (BO->getOpcode()) {
2023 // Consider the RHS of comma for side effects. LHS was checked by
2024 // Sema::CheckCommaOperands.
2026 // ((foo = <blah>), 0) is an idiom for hiding the result (and
2027 // lvalue-ness) of an assignment written in a macro.
2028 if (IntegerLiteral *IE =
2029 dyn_cast<IntegerLiteral>(BO->getRHS()->IgnoreParens()))
2030 if (IE->getValue() == 0)
2032 return BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2033 // Consider '||', '&&' to have side effects if the LHS or RHS does.
2036 if (!BO->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) ||
2037 !BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2041 if (BO->isAssignmentOp())
2044 Loc = BO->getOperatorLoc();
2045 R1 = BO->getLHS()->getSourceRange();
2046 R2 = BO->getRHS()->getSourceRange();
2049 case CompoundAssignOperatorClass:
2050 case VAArgExprClass:
2051 case AtomicExprClass:
2054 case ConditionalOperatorClass: {
2055 // If only one of the LHS or RHS is a warning, the operator might
2056 // be being used for control flow. Only warn if both the LHS and
2057 // RHS are warnings.
2058 const ConditionalOperator *Exp = cast<ConditionalOperator>(this);
2059 if (!Exp->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2063 return Exp->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2066 case MemberExprClass:
2068 Loc = cast<MemberExpr>(this)->getMemberLoc();
2069 R1 = SourceRange(Loc, Loc);
2070 R2 = cast<MemberExpr>(this)->getBase()->getSourceRange();
2073 case ArraySubscriptExprClass:
2075 Loc = cast<ArraySubscriptExpr>(this)->getRBracketLoc();
2076 R1 = cast<ArraySubscriptExpr>(this)->getLHS()->getSourceRange();
2077 R2 = cast<ArraySubscriptExpr>(this)->getRHS()->getSourceRange();
2080 case CXXOperatorCallExprClass: {
2081 // Warn about operator ==,!=,<,>,<=, and >= even when user-defined operator
2082 // overloads as there is no reasonable way to define these such that they
2083 // have non-trivial, desirable side-effects. See the -Wunused-comparison
2084 // warning: operators == and != are commonly typo'ed, and so warning on them
2085 // provides additional value as well. If this list is updated,
2086 // DiagnoseUnusedComparison should be as well.
2087 const CXXOperatorCallExpr *Op = cast<CXXOperatorCallExpr>(this);
2088 switch (Op->getOperator()) {
2092 case OO_ExclaimEqual:
2095 case OO_GreaterEqual:
2098 Loc = Op->getOperatorLoc();
2099 R1 = Op->getSourceRange();
2103 // Fallthrough for generic call handling.
2106 case CXXMemberCallExprClass:
2107 case UserDefinedLiteralClass: {
2108 // If this is a direct call, get the callee.
2109 const CallExpr *CE = cast<CallExpr>(this);
2110 if (const Decl *FD = CE->getCalleeDecl()) {
2111 // If the callee has attribute pure, const, or warn_unused_result, warn
2112 // about it. void foo() { strlen("bar"); } should warn.
2114 // Note: If new cases are added here, DiagnoseUnusedExprResult should be
2115 // updated to match for QoI.
2116 if (FD->hasAttr<WarnUnusedResultAttr>() ||
2117 FD->hasAttr<PureAttr>() || FD->hasAttr<ConstAttr>()) {
2119 Loc = CE->getCallee()->getLocStart();
2120 R1 = CE->getCallee()->getSourceRange();
2122 if (unsigned NumArgs = CE->getNumArgs())
2123 R2 = SourceRange(CE->getArg(0)->getLocStart(),
2124 CE->getArg(NumArgs-1)->getLocEnd());
2131 // If we don't know precisely what we're looking at, let's not warn.
2132 case UnresolvedLookupExprClass:
2133 case CXXUnresolvedConstructExprClass:
2136 case CXXTemporaryObjectExprClass:
2137 case CXXConstructExprClass: {
2138 if (const CXXRecordDecl *Type = getType()->getAsCXXRecordDecl()) {
2139 if (Type->hasAttr<WarnUnusedAttr>()) {
2141 Loc = getLocStart();
2142 R1 = getSourceRange();
2149 case ObjCMessageExprClass: {
2150 const ObjCMessageExpr *ME = cast<ObjCMessageExpr>(this);
2151 if (Ctx.getLangOpts().ObjCAutoRefCount &&
2152 ME->isInstanceMessage() &&
2153 !ME->getType()->isVoidType() &&
2154 ME->getMethodFamily() == OMF_init) {
2157 R1 = ME->getSourceRange();
2161 const ObjCMethodDecl *MD = ME->getMethodDecl();
2162 if (MD && MD->hasAttr<WarnUnusedResultAttr>()) {
2170 case ObjCPropertyRefExprClass:
2173 R1 = getSourceRange();
2176 case PseudoObjectExprClass: {
2177 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
2179 // Only complain about things that have the form of a getter.
2180 if (isa<UnaryOperator>(PO->getSyntacticForm()) ||
2181 isa<BinaryOperator>(PO->getSyntacticForm()))
2186 R1 = getSourceRange();
2190 case StmtExprClass: {
2191 // Statement exprs don't logically have side effects themselves, but are
2192 // sometimes used in macros in ways that give them a type that is unused.
2193 // For example ({ blah; foo(); }) will end up with a type if foo has a type.
2194 // however, if the result of the stmt expr is dead, we don't want to emit a
2196 const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt();
2197 if (!CS->body_empty()) {
2198 if (const Expr *E = dyn_cast<Expr>(CS->body_back()))
2199 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2200 if (const LabelStmt *Label = dyn_cast<LabelStmt>(CS->body_back()))
2201 if (const Expr *E = dyn_cast<Expr>(Label->getSubStmt()))
2202 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2205 if (getType()->isVoidType())
2208 Loc = cast<StmtExpr>(this)->getLParenLoc();
2209 R1 = getSourceRange();
2212 case CXXFunctionalCastExprClass:
2213 case CStyleCastExprClass: {
2214 // Ignore an explicit cast to void unless the operand is a non-trivial
2216 const CastExpr *CE = cast<CastExpr>(this);
2217 if (CE->getCastKind() == CK_ToVoid) {
2218 if (CE->getSubExpr()->isGLValue() &&
2219 CE->getSubExpr()->getType().isVolatileQualified()) {
2220 const DeclRefExpr *DRE =
2221 dyn_cast<DeclRefExpr>(CE->getSubExpr()->IgnoreParens());
2222 if (!(DRE && isa<VarDecl>(DRE->getDecl()) &&
2223 cast<VarDecl>(DRE->getDecl())->hasLocalStorage())) {
2224 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc,
2231 // If this is a cast to a constructor conversion, check the operand.
2232 // Otherwise, the result of the cast is unused.
2233 if (CE->getCastKind() == CK_ConstructorConversion)
2234 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2237 if (const CXXFunctionalCastExpr *CXXCE =
2238 dyn_cast<CXXFunctionalCastExpr>(this)) {
2239 Loc = CXXCE->getLocStart();
2240 R1 = CXXCE->getSubExpr()->getSourceRange();
2242 const CStyleCastExpr *CStyleCE = cast<CStyleCastExpr>(this);
2243 Loc = CStyleCE->getLParenLoc();
2244 R1 = CStyleCE->getSubExpr()->getSourceRange();
2248 case ImplicitCastExprClass: {
2249 const CastExpr *ICE = cast<ImplicitCastExpr>(this);
2251 // lvalue-to-rvalue conversion on a volatile lvalue is a side-effect.
2252 if (ICE->getCastKind() == CK_LValueToRValue &&
2253 ICE->getSubExpr()->getType().isVolatileQualified())
2256 return ICE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2258 case CXXDefaultArgExprClass:
2259 return (cast<CXXDefaultArgExpr>(this)
2260 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2261 case CXXDefaultInitExprClass:
2262 return (cast<CXXDefaultInitExpr>(this)
2263 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2265 case CXXNewExprClass:
2266 // FIXME: In theory, there might be new expressions that don't have side
2267 // effects (e.g. a placement new with an uninitialized POD).
2268 case CXXDeleteExprClass:
2270 case CXXBindTemporaryExprClass:
2271 return (cast<CXXBindTemporaryExpr>(this)
2272 ->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2273 case ExprWithCleanupsClass:
2274 return (cast<ExprWithCleanups>(this)
2275 ->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2279 /// isOBJCGCCandidate - Check if an expression is objc gc'able.
2280 /// returns true, if it is; false otherwise.
2281 bool Expr::isOBJCGCCandidate(ASTContext &Ctx) const {
2282 const Expr *E = IgnoreParens();
2283 switch (E->getStmtClass()) {
2286 case ObjCIvarRefExprClass:
2288 case Expr::UnaryOperatorClass:
2289 return cast<UnaryOperator>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2290 case ImplicitCastExprClass:
2291 return cast<ImplicitCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2292 case MaterializeTemporaryExprClass:
2293 return cast<MaterializeTemporaryExpr>(E)->GetTemporaryExpr()
2294 ->isOBJCGCCandidate(Ctx);
2295 case CStyleCastExprClass:
2296 return cast<CStyleCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2297 case DeclRefExprClass: {
2298 const Decl *D = cast<DeclRefExpr>(E)->getDecl();
2300 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
2301 if (VD->hasGlobalStorage())
2303 QualType T = VD->getType();
2304 // dereferencing to a pointer is always a gc'able candidate,
2305 // unless it is __weak.
2306 return T->isPointerType() &&
2307 (Ctx.getObjCGCAttrKind(T) != Qualifiers::Weak);
2311 case MemberExprClass: {
2312 const MemberExpr *M = cast<MemberExpr>(E);
2313 return M->getBase()->isOBJCGCCandidate(Ctx);
2315 case ArraySubscriptExprClass:
2316 return cast<ArraySubscriptExpr>(E)->getBase()->isOBJCGCCandidate(Ctx);
2320 bool Expr::isBoundMemberFunction(ASTContext &Ctx) const {
2321 if (isTypeDependent())
2323 return ClassifyLValue(Ctx) == Expr::LV_MemberFunction;
2326 QualType Expr::findBoundMemberType(const Expr *expr) {
2327 assert(expr->hasPlaceholderType(BuiltinType::BoundMember));
2329 // Bound member expressions are always one of these possibilities:
2330 // x->m x.m x->*y x.*y
2331 // (possibly parenthesized)
2333 expr = expr->IgnoreParens();
2334 if (const MemberExpr *mem = dyn_cast<MemberExpr>(expr)) {
2335 assert(isa<CXXMethodDecl>(mem->getMemberDecl()));
2336 return mem->getMemberDecl()->getType();
2339 if (const BinaryOperator *op = dyn_cast<BinaryOperator>(expr)) {
2340 QualType type = op->getRHS()->getType()->castAs<MemberPointerType>()
2342 assert(type->isFunctionType());
2346 assert(isa<UnresolvedMemberExpr>(expr));
2350 Expr* Expr::IgnoreParens() {
2353 if (ParenExpr* P = dyn_cast<ParenExpr>(E)) {
2354 E = P->getSubExpr();
2357 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) {
2358 if (P->getOpcode() == UO_Extension) {
2359 E = P->getSubExpr();
2363 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) {
2364 if (!P->isResultDependent()) {
2365 E = P->getResultExpr();
2369 if (ChooseExpr* P = dyn_cast<ChooseExpr>(E)) {
2370 if (!P->isConditionDependent()) {
2371 E = P->getChosenSubExpr();
2379 /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr
2380 /// or CastExprs or ImplicitCastExprs, returning their operand.
2381 Expr *Expr::IgnoreParenCasts() {
2384 E = E->IgnoreParens();
2385 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2386 E = P->getSubExpr();
2389 if (MaterializeTemporaryExpr *Materialize
2390 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2391 E = Materialize->GetTemporaryExpr();
2394 if (SubstNonTypeTemplateParmExpr *NTTP
2395 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2396 E = NTTP->getReplacement();
2403 Expr *Expr::IgnoreCasts() {
2406 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2407 E = P->getSubExpr();
2410 if (MaterializeTemporaryExpr *Materialize
2411 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2412 E = Materialize->GetTemporaryExpr();
2415 if (SubstNonTypeTemplateParmExpr *NTTP
2416 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2417 E = NTTP->getReplacement();
2424 /// IgnoreParenLValueCasts - Ignore parentheses and lvalue-to-rvalue
2425 /// casts. This is intended purely as a temporary workaround for code
2426 /// that hasn't yet been rewritten to do the right thing about those
2427 /// casts, and may disappear along with the last internal use.
2428 Expr *Expr::IgnoreParenLValueCasts() {
2431 E = E->IgnoreParens();
2432 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2433 if (P->getCastKind() == CK_LValueToRValue) {
2434 E = P->getSubExpr();
2437 } else if (MaterializeTemporaryExpr *Materialize
2438 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2439 E = Materialize->GetTemporaryExpr();
2441 } else if (SubstNonTypeTemplateParmExpr *NTTP
2442 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2443 E = NTTP->getReplacement();
2451 Expr *Expr::ignoreParenBaseCasts() {
2454 E = E->IgnoreParens();
2455 if (CastExpr *CE = dyn_cast<CastExpr>(E)) {
2456 if (CE->getCastKind() == CK_DerivedToBase ||
2457 CE->getCastKind() == CK_UncheckedDerivedToBase ||
2458 CE->getCastKind() == CK_NoOp) {
2459 E = CE->getSubExpr();
2468 Expr *Expr::IgnoreParenImpCasts() {
2471 E = E->IgnoreParens();
2472 if (ImplicitCastExpr *P = dyn_cast<ImplicitCastExpr>(E)) {
2473 E = P->getSubExpr();
2476 if (MaterializeTemporaryExpr *Materialize
2477 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2478 E = Materialize->GetTemporaryExpr();
2481 if (SubstNonTypeTemplateParmExpr *NTTP
2482 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2483 E = NTTP->getReplacement();
2490 Expr *Expr::IgnoreConversionOperator() {
2491 if (CXXMemberCallExpr *MCE = dyn_cast<CXXMemberCallExpr>(this)) {
2492 if (MCE->getMethodDecl() && isa<CXXConversionDecl>(MCE->getMethodDecl()))
2493 return MCE->getImplicitObjectArgument();
2498 /// IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the
2499 /// value (including ptr->int casts of the same size). Strip off any
2500 /// ParenExpr or CastExprs, returning their operand.
2501 Expr *Expr::IgnoreParenNoopCasts(ASTContext &Ctx) {
2504 E = E->IgnoreParens();
2506 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2507 // We ignore integer <-> casts that are of the same width, ptr<->ptr and
2508 // ptr<->int casts of the same width. We also ignore all identity casts.
2509 Expr *SE = P->getSubExpr();
2511 if (Ctx.hasSameUnqualifiedType(E->getType(), SE->getType())) {
2516 if ((E->getType()->isPointerType() ||
2517 E->getType()->isIntegralType(Ctx)) &&
2518 (SE->getType()->isPointerType() ||
2519 SE->getType()->isIntegralType(Ctx)) &&
2520 Ctx.getTypeSize(E->getType()) == Ctx.getTypeSize(SE->getType())) {
2526 if (SubstNonTypeTemplateParmExpr *NTTP
2527 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2528 E = NTTP->getReplacement();
2536 bool Expr::isDefaultArgument() const {
2537 const Expr *E = this;
2538 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2539 E = M->GetTemporaryExpr();
2541 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E))
2542 E = ICE->getSubExprAsWritten();
2544 return isa<CXXDefaultArgExpr>(E);
2547 /// \brief Skip over any no-op casts and any temporary-binding
2549 static const Expr *skipTemporaryBindingsNoOpCastsAndParens(const Expr *E) {
2550 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2551 E = M->GetTemporaryExpr();
2553 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2554 if (ICE->getCastKind() == CK_NoOp)
2555 E = ICE->getSubExpr();
2560 while (const CXXBindTemporaryExpr *BE = dyn_cast<CXXBindTemporaryExpr>(E))
2561 E = BE->getSubExpr();
2563 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2564 if (ICE->getCastKind() == CK_NoOp)
2565 E = ICE->getSubExpr();
2570 return E->IgnoreParens();
2573 /// isTemporaryObject - Determines if this expression produces a
2574 /// temporary of the given class type.
2575 bool Expr::isTemporaryObject(ASTContext &C, const CXXRecordDecl *TempTy) const {
2576 if (!C.hasSameUnqualifiedType(getType(), C.getTypeDeclType(TempTy)))
2579 const Expr *E = skipTemporaryBindingsNoOpCastsAndParens(this);
2581 // Temporaries are by definition pr-values of class type.
2582 if (!E->Classify(C).isPRValue()) {
2583 // In this context, property reference is a message call and is pr-value.
2584 if (!isa<ObjCPropertyRefExpr>(E))
2588 // Black-list a few cases which yield pr-values of class type that don't
2589 // refer to temporaries of that type:
2591 // - implicit derived-to-base conversions
2592 if (isa<ImplicitCastExpr>(E)) {
2593 switch (cast<ImplicitCastExpr>(E)->getCastKind()) {
2594 case CK_DerivedToBase:
2595 case CK_UncheckedDerivedToBase:
2602 // - member expressions (all)
2603 if (isa<MemberExpr>(E))
2606 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E))
2607 if (BO->isPtrMemOp())
2610 // - opaque values (all)
2611 if (isa<OpaqueValueExpr>(E))
2617 bool Expr::isImplicitCXXThis() const {
2618 const Expr *E = this;
2620 // Strip away parentheses and casts we don't care about.
2622 if (const ParenExpr *Paren = dyn_cast<ParenExpr>(E)) {
2623 E = Paren->getSubExpr();
2627 if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2628 if (ICE->getCastKind() == CK_NoOp ||
2629 ICE->getCastKind() == CK_LValueToRValue ||
2630 ICE->getCastKind() == CK_DerivedToBase ||
2631 ICE->getCastKind() == CK_UncheckedDerivedToBase) {
2632 E = ICE->getSubExpr();
2637 if (const UnaryOperator* UnOp = dyn_cast<UnaryOperator>(E)) {
2638 if (UnOp->getOpcode() == UO_Extension) {
2639 E = UnOp->getSubExpr();
2644 if (const MaterializeTemporaryExpr *M
2645 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2646 E = M->GetTemporaryExpr();
2653 if (const CXXThisExpr *This = dyn_cast<CXXThisExpr>(E))
2654 return This->isImplicit();
2659 /// hasAnyTypeDependentArguments - Determines if any of the expressions
2660 /// in Exprs is type-dependent.
2661 bool Expr::hasAnyTypeDependentArguments(ArrayRef<Expr *> Exprs) {
2662 for (unsigned I = 0; I < Exprs.size(); ++I)
2663 if (Exprs[I]->isTypeDependent())
2669 bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef) const {
2670 // This function is attempting whether an expression is an initializer
2671 // which can be evaluated at compile-time. It very closely parallels
2672 // ConstExprEmitter in CGExprConstant.cpp; if they don't match, it
2673 // will lead to unexpected results. Like ConstExprEmitter, it falls back
2674 // to isEvaluatable most of the time.
2676 // If we ever capture reference-binding directly in the AST, we can
2677 // kill the second parameter.
2681 return EvaluateAsLValue(Result, Ctx) && !Result.HasSideEffects;
2684 switch (getStmtClass()) {
2686 case StringLiteralClass:
2687 case ObjCEncodeExprClass:
2689 case CXXTemporaryObjectExprClass:
2690 case CXXConstructExprClass: {
2691 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
2693 if (CE->getConstructor()->isTrivial() &&
2694 CE->getConstructor()->getParent()->hasTrivialDestructor()) {
2695 // Trivial default constructor
2696 if (!CE->getNumArgs()) return true;
2698 // Trivial copy constructor
2699 assert(CE->getNumArgs() == 1 && "trivial ctor with > 1 argument");
2700 return CE->getArg(0)->isConstantInitializer(Ctx, false);
2705 case CompoundLiteralExprClass: {
2706 // This handles gcc's extension that allows global initializers like
2707 // "struct x {int x;} x = (struct x) {};".
2708 // FIXME: This accepts other cases it shouldn't!
2709 const Expr *Exp = cast<CompoundLiteralExpr>(this)->getInitializer();
2710 return Exp->isConstantInitializer(Ctx, false);
2712 case InitListExprClass: {
2713 const InitListExpr *ILE = cast<InitListExpr>(this);
2714 if (ILE->getType()->isArrayType()) {
2715 unsigned numInits = ILE->getNumInits();
2716 for (unsigned i = 0; i < numInits; i++) {
2717 if (!ILE->getInit(i)->isConstantInitializer(Ctx, false))
2723 if (ILE->getType()->isRecordType()) {
2724 unsigned ElementNo = 0;
2725 RecordDecl *RD = ILE->getType()->getAs<RecordType>()->getDecl();
2726 for (RecordDecl::field_iterator Field = RD->field_begin(),
2727 FieldEnd = RD->field_end(); Field != FieldEnd; ++Field) {
2728 // If this is a union, skip all the fields that aren't being initialized.
2729 if (RD->isUnion() && ILE->getInitializedFieldInUnion() != *Field)
2732 // Don't emit anonymous bitfields, they just affect layout.
2733 if (Field->isUnnamedBitfield())
2736 if (ElementNo < ILE->getNumInits()) {
2737 const Expr *Elt = ILE->getInit(ElementNo++);
2738 if (Field->isBitField()) {
2739 // Bitfields have to evaluate to an integer.
2740 llvm::APSInt ResultTmp;
2741 if (!Elt->EvaluateAsInt(ResultTmp, Ctx))
2744 bool RefType = Field->getType()->isReferenceType();
2745 if (!Elt->isConstantInitializer(Ctx, RefType))
2755 case ImplicitValueInitExprClass:
2757 case ParenExprClass:
2758 return cast<ParenExpr>(this)->getSubExpr()
2759 ->isConstantInitializer(Ctx, IsForRef);
2760 case GenericSelectionExprClass:
2761 return cast<GenericSelectionExpr>(this)->getResultExpr()
2762 ->isConstantInitializer(Ctx, IsForRef);
2763 case ChooseExprClass:
2764 if (cast<ChooseExpr>(this)->isConditionDependent())
2766 return cast<ChooseExpr>(this)->getChosenSubExpr()
2767 ->isConstantInitializer(Ctx, IsForRef);
2768 case UnaryOperatorClass: {
2769 const UnaryOperator* Exp = cast<UnaryOperator>(this);
2770 if (Exp->getOpcode() == UO_Extension)
2771 return Exp->getSubExpr()->isConstantInitializer(Ctx, false);
2774 case CXXFunctionalCastExprClass:
2775 case CXXStaticCastExprClass:
2776 case ImplicitCastExprClass:
2777 case CStyleCastExprClass:
2778 case ObjCBridgedCastExprClass:
2779 case CXXDynamicCastExprClass:
2780 case CXXReinterpretCastExprClass:
2781 case CXXConstCastExprClass: {
2782 const CastExpr *CE = cast<CastExpr>(this);
2784 // Handle misc casts we want to ignore.
2785 if (CE->getCastKind() == CK_NoOp ||
2786 CE->getCastKind() == CK_LValueToRValue ||
2787 CE->getCastKind() == CK_ToUnion ||
2788 CE->getCastKind() == CK_ConstructorConversion ||
2789 CE->getCastKind() == CK_NonAtomicToAtomic ||
2790 CE->getCastKind() == CK_AtomicToNonAtomic)
2791 return CE->getSubExpr()->isConstantInitializer(Ctx, false);
2795 case MaterializeTemporaryExprClass:
2796 return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
2797 ->isConstantInitializer(Ctx, false);
2799 case SubstNonTypeTemplateParmExprClass:
2800 return cast<SubstNonTypeTemplateParmExpr>(this)->getReplacement()
2801 ->isConstantInitializer(Ctx, false);
2802 case CXXDefaultArgExprClass:
2803 return cast<CXXDefaultArgExpr>(this)->getExpr()
2804 ->isConstantInitializer(Ctx, false);
2805 case CXXDefaultInitExprClass:
2806 return cast<CXXDefaultInitExpr>(this)->getExpr()
2807 ->isConstantInitializer(Ctx, false);
2809 return isEvaluatable(Ctx);
2812 bool Expr::HasSideEffects(const ASTContext &Ctx) const {
2813 if (isInstantiationDependent())
2816 switch (getStmtClass()) {
2818 #define ABSTRACT_STMT(Type)
2819 #define STMT(Type, Base) case Type##Class:
2820 #define EXPR(Type, Base)
2821 #include "clang/AST/StmtNodes.inc"
2822 llvm_unreachable("unexpected Expr kind");
2824 case DependentScopeDeclRefExprClass:
2825 case CXXUnresolvedConstructExprClass:
2826 case CXXDependentScopeMemberExprClass:
2827 case UnresolvedLookupExprClass:
2828 case UnresolvedMemberExprClass:
2829 case PackExpansionExprClass:
2830 case SubstNonTypeTemplateParmPackExprClass:
2831 case FunctionParmPackExprClass:
2832 llvm_unreachable("shouldn't see dependent / unresolved nodes here");
2834 case DeclRefExprClass:
2835 case ObjCIvarRefExprClass:
2836 case PredefinedExprClass:
2837 case IntegerLiteralClass:
2838 case FloatingLiteralClass:
2839 case ImaginaryLiteralClass:
2840 case StringLiteralClass:
2841 case CharacterLiteralClass:
2842 case OffsetOfExprClass:
2843 case ImplicitValueInitExprClass:
2844 case UnaryExprOrTypeTraitExprClass:
2845 case AddrLabelExprClass:
2846 case GNUNullExprClass:
2847 case CXXBoolLiteralExprClass:
2848 case CXXNullPtrLiteralExprClass:
2849 case CXXThisExprClass:
2850 case CXXScalarValueInitExprClass:
2851 case TypeTraitExprClass:
2852 case ArrayTypeTraitExprClass:
2853 case ExpressionTraitExprClass:
2854 case CXXNoexceptExprClass:
2855 case SizeOfPackExprClass:
2856 case ObjCStringLiteralClass:
2857 case ObjCEncodeExprClass:
2858 case ObjCBoolLiteralExprClass:
2859 case CXXUuidofExprClass:
2860 case OpaqueValueExprClass:
2861 // These never have a side-effect.
2865 case MSPropertyRefExprClass:
2866 case CompoundAssignOperatorClass:
2867 case VAArgExprClass:
2868 case AtomicExprClass:
2870 case CXXOperatorCallExprClass:
2871 case CXXMemberCallExprClass:
2872 case UserDefinedLiteralClass:
2873 case CXXThrowExprClass:
2874 case CXXNewExprClass:
2875 case CXXDeleteExprClass:
2876 case ExprWithCleanupsClass:
2877 case CXXBindTemporaryExprClass:
2878 case BlockExprClass:
2879 case CUDAKernelCallExprClass:
2880 // These always have a side-effect.
2883 case ParenExprClass:
2884 case ArraySubscriptExprClass:
2885 case MemberExprClass:
2886 case ConditionalOperatorClass:
2887 case BinaryConditionalOperatorClass:
2888 case CompoundLiteralExprClass:
2889 case ExtVectorElementExprClass:
2890 case DesignatedInitExprClass:
2891 case ParenListExprClass:
2892 case CXXPseudoDestructorExprClass:
2893 case CXXStdInitializerListExprClass:
2894 case SubstNonTypeTemplateParmExprClass:
2895 case MaterializeTemporaryExprClass:
2896 case ShuffleVectorExprClass:
2897 case ConvertVectorExprClass:
2898 case AsTypeExprClass:
2899 // These have a side-effect if any subexpression does.
2902 case UnaryOperatorClass:
2903 if (cast<UnaryOperator>(this)->isIncrementDecrementOp())
2907 case BinaryOperatorClass:
2908 if (cast<BinaryOperator>(this)->isAssignmentOp())
2912 case InitListExprClass:
2913 // FIXME: The children for an InitListExpr doesn't include the array filler.
2914 if (const Expr *E = cast<InitListExpr>(this)->getArrayFiller())
2915 if (E->HasSideEffects(Ctx))
2919 case GenericSelectionExprClass:
2920 return cast<GenericSelectionExpr>(this)->getResultExpr()->
2921 HasSideEffects(Ctx);
2923 case ChooseExprClass:
2924 return cast<ChooseExpr>(this)->getChosenSubExpr()->HasSideEffects(Ctx);
2926 case CXXDefaultArgExprClass:
2927 return cast<CXXDefaultArgExpr>(this)->getExpr()->HasSideEffects(Ctx);
2929 case CXXDefaultInitExprClass:
2930 if (const Expr *E = cast<CXXDefaultInitExpr>(this)->getExpr())
2931 return E->HasSideEffects(Ctx);
2932 // If we've not yet parsed the initializer, assume it has side-effects.
2935 case CXXDynamicCastExprClass: {
2936 // A dynamic_cast expression has side-effects if it can throw.
2937 const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(this);
2938 if (DCE->getTypeAsWritten()->isReferenceType() &&
2939 DCE->getCastKind() == CK_Dynamic)
2942 case ImplicitCastExprClass:
2943 case CStyleCastExprClass:
2944 case CXXStaticCastExprClass:
2945 case CXXReinterpretCastExprClass:
2946 case CXXConstCastExprClass:
2947 case CXXFunctionalCastExprClass: {
2948 const CastExpr *CE = cast<CastExpr>(this);
2949 if (CE->getCastKind() == CK_LValueToRValue &&
2950 CE->getSubExpr()->getType().isVolatileQualified())
2955 case CXXTypeidExprClass:
2956 // typeid might throw if its subexpression is potentially-evaluated, so has
2957 // side-effects in that case whether or not its subexpression does.
2958 return cast<CXXTypeidExpr>(this)->isPotentiallyEvaluated();
2960 case CXXConstructExprClass:
2961 case CXXTemporaryObjectExprClass: {
2962 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
2963 if (!CE->getConstructor()->isTrivial())
2965 // A trivial constructor does not add any side-effects of its own. Just look
2966 // at its arguments.
2970 case LambdaExprClass: {
2971 const LambdaExpr *LE = cast<LambdaExpr>(this);
2972 for (LambdaExpr::capture_iterator I = LE->capture_begin(),
2973 E = LE->capture_end(); I != E; ++I)
2974 if (I->getCaptureKind() == LCK_ByCopy)
2975 // FIXME: Only has a side-effect if the variable is volatile or if
2976 // the copy would invoke a non-trivial copy constructor.
2981 case PseudoObjectExprClass: {
2982 // Only look for side-effects in the semantic form, and look past
2983 // OpaqueValueExpr bindings in that form.
2984 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
2985 for (PseudoObjectExpr::const_semantics_iterator I = PO->semantics_begin(),
2986 E = PO->semantics_end();
2988 const Expr *Subexpr = *I;
2989 if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(Subexpr))
2990 Subexpr = OVE->getSourceExpr();
2991 if (Subexpr->HasSideEffects(Ctx))
2997 case ObjCBoxedExprClass:
2998 case ObjCArrayLiteralClass:
2999 case ObjCDictionaryLiteralClass:
3000 case ObjCMessageExprClass:
3001 case ObjCSelectorExprClass:
3002 case ObjCProtocolExprClass:
3003 case ObjCPropertyRefExprClass:
3004 case ObjCIsaExprClass:
3005 case ObjCIndirectCopyRestoreExprClass:
3006 case ObjCSubscriptRefExprClass:
3007 case ObjCBridgedCastExprClass:
3008 // FIXME: Classify these cases better.
3012 // Recurse to children.
3013 for (const_child_range SubStmts = children(); SubStmts; ++SubStmts)
3014 if (const Stmt *S = *SubStmts)
3015 if (cast<Expr>(S)->HasSideEffects(Ctx))
3022 /// \brief Look for a call to a non-trivial function within an expression.
3023 class NonTrivialCallFinder : public EvaluatedExprVisitor<NonTrivialCallFinder>
3025 typedef EvaluatedExprVisitor<NonTrivialCallFinder> Inherited;
3030 explicit NonTrivialCallFinder(ASTContext &Context)
3031 : Inherited(Context), NonTrivial(false) { }
3033 bool hasNonTrivialCall() const { return NonTrivial; }
3035 void VisitCallExpr(CallExpr *E) {
3036 if (CXXMethodDecl *Method
3037 = dyn_cast_or_null<CXXMethodDecl>(E->getCalleeDecl())) {
3038 if (Method->isTrivial()) {
3039 // Recurse to children of the call.
3040 Inherited::VisitStmt(E);
3048 void VisitCXXConstructExpr(CXXConstructExpr *E) {
3049 if (E->getConstructor()->isTrivial()) {
3050 // Recurse to children of the call.
3051 Inherited::VisitStmt(E);
3058 void VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) {
3059 if (E->getTemporary()->getDestructor()->isTrivial()) {
3060 Inherited::VisitStmt(E);
3069 bool Expr::hasNonTrivialCall(ASTContext &Ctx) {
3070 NonTrivialCallFinder Finder(Ctx);
3072 return Finder.hasNonTrivialCall();
3075 /// isNullPointerConstant - C99 6.3.2.3p3 - Return whether this is a null
3076 /// pointer constant or not, as well as the specific kind of constant detected.
3077 /// Null pointer constants can be integer constant expressions with the
3078 /// value zero, casts of zero to void*, nullptr (C++0X), or __null
3079 /// (a GNU extension).
3080 Expr::NullPointerConstantKind
3081 Expr::isNullPointerConstant(ASTContext &Ctx,
3082 NullPointerConstantValueDependence NPC) const {
3083 if (isValueDependent() &&
3084 (!Ctx.getLangOpts().CPlusPlus11 || Ctx.getLangOpts().MSVCCompat)) {
3086 case NPC_NeverValueDependent:
3087 llvm_unreachable("Unexpected value dependent expression!");
3088 case NPC_ValueDependentIsNull:
3089 if (isTypeDependent() || getType()->isIntegralType(Ctx))
3090 return NPCK_ZeroExpression;
3092 return NPCK_NotNull;
3094 case NPC_ValueDependentIsNotNull:
3095 return NPCK_NotNull;
3099 // Strip off a cast to void*, if it exists. Except in C++.
3100 if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) {
3101 if (!Ctx.getLangOpts().CPlusPlus) {
3102 // Check that it is a cast to void*.
3103 if (const PointerType *PT = CE->getType()->getAs<PointerType>()) {
3104 QualType Pointee = PT->getPointeeType();
3105 if (!Pointee.hasQualifiers() &&
3106 Pointee->isVoidType() && // to void*
3107 CE->getSubExpr()->getType()->isIntegerType()) // from int.
3108 return CE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3111 } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) {
3112 // Ignore the ImplicitCastExpr type entirely.
3113 return ICE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3114 } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) {
3115 // Accept ((void*)0) as a null pointer constant, as many other
3116 // implementations do.
3117 return PE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3118 } else if (const GenericSelectionExpr *GE =
3119 dyn_cast<GenericSelectionExpr>(this)) {
3120 if (GE->isResultDependent())
3121 return NPCK_NotNull;
3122 return GE->getResultExpr()->isNullPointerConstant(Ctx, NPC);
3123 } else if (const ChooseExpr *CE = dyn_cast<ChooseExpr>(this)) {
3124 if (CE->isConditionDependent())
3125 return NPCK_NotNull;
3126 return CE->getChosenSubExpr()->isNullPointerConstant(Ctx, NPC);
3127 } else if (const CXXDefaultArgExpr *DefaultArg
3128 = dyn_cast<CXXDefaultArgExpr>(this)) {
3129 // See through default argument expressions.
3130 return DefaultArg->getExpr()->isNullPointerConstant(Ctx, NPC);
3131 } else if (const CXXDefaultInitExpr *DefaultInit
3132 = dyn_cast<CXXDefaultInitExpr>(this)) {
3133 // See through default initializer expressions.
3134 return DefaultInit->getExpr()->isNullPointerConstant(Ctx, NPC);
3135 } else if (isa<GNUNullExpr>(this)) {
3136 // The GNU __null extension is always a null pointer constant.
3137 return NPCK_GNUNull;
3138 } else if (const MaterializeTemporaryExpr *M
3139 = dyn_cast<MaterializeTemporaryExpr>(this)) {
3140 return M->GetTemporaryExpr()->isNullPointerConstant(Ctx, NPC);
3141 } else if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(this)) {
3142 if (const Expr *Source = OVE->getSourceExpr())
3143 return Source->isNullPointerConstant(Ctx, NPC);
3146 // C++11 nullptr_t is always a null pointer constant.
3147 if (getType()->isNullPtrType())
3148 return NPCK_CXX11_nullptr;
3150 if (const RecordType *UT = getType()->getAsUnionType())
3151 if (!Ctx.getLangOpts().CPlusPlus11 &&
3152 UT && UT->getDecl()->hasAttr<TransparentUnionAttr>())
3153 if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(this)){
3154 const Expr *InitExpr = CLE->getInitializer();
3155 if (const InitListExpr *ILE = dyn_cast<InitListExpr>(InitExpr))
3156 return ILE->getInit(0)->isNullPointerConstant(Ctx, NPC);
3158 // This expression must be an integer type.
3159 if (!getType()->isIntegerType() ||
3160 (Ctx.getLangOpts().CPlusPlus && getType()->isEnumeralType()))
3161 return NPCK_NotNull;
3163 if (Ctx.getLangOpts().CPlusPlus11) {
3164 // C++11 [conv.ptr]p1: A null pointer constant is an integer literal with
3165 // value zero or a prvalue of type std::nullptr_t.
3166 // Microsoft mode permits C++98 rules reflecting MSVC behavior.
3167 const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(this);
3168 if (Lit && !Lit->getValue())
3169 return NPCK_ZeroLiteral;
3170 else if (!Ctx.getLangOpts().MSVCCompat || !isCXX98IntegralConstantExpr(Ctx))
3171 return NPCK_NotNull;
3173 // If we have an integer constant expression, we need to *evaluate* it and
3174 // test for the value 0.
3175 if (!isIntegerConstantExpr(Ctx))
3176 return NPCK_NotNull;
3179 if (EvaluateKnownConstInt(Ctx) != 0)
3180 return NPCK_NotNull;
3182 if (isa<IntegerLiteral>(this))
3183 return NPCK_ZeroLiteral;
3184 return NPCK_ZeroExpression;
3187 /// \brief If this expression is an l-value for an Objective C
3188 /// property, find the underlying property reference expression.
3189 const ObjCPropertyRefExpr *Expr::getObjCProperty() const {
3190 const Expr *E = this;
3192 assert((E->getValueKind() == VK_LValue &&
3193 E->getObjectKind() == OK_ObjCProperty) &&
3194 "expression is not a property reference");
3195 E = E->IgnoreParenCasts();
3196 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
3197 if (BO->getOpcode() == BO_Comma) {
3206 return cast<ObjCPropertyRefExpr>(E);
3209 bool Expr::isObjCSelfExpr() const {
3210 const Expr *E = IgnoreParenImpCasts();
3212 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E);
3216 const ImplicitParamDecl *Param = dyn_cast<ImplicitParamDecl>(DRE->getDecl());
3220 const ObjCMethodDecl *M = dyn_cast<ObjCMethodDecl>(Param->getDeclContext());
3224 return M->getSelfDecl() == Param;
3227 FieldDecl *Expr::getSourceBitField() {
3228 Expr *E = this->IgnoreParens();
3230 while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3231 if (ICE->getCastKind() == CK_LValueToRValue ||
3232 (ICE->getValueKind() != VK_RValue && ICE->getCastKind() == CK_NoOp))
3233 E = ICE->getSubExpr()->IgnoreParens();
3238 if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E))
3239 if (FieldDecl *Field = dyn_cast<FieldDecl>(MemRef->getMemberDecl()))
3240 if (Field->isBitField())
3243 if (ObjCIvarRefExpr *IvarRef = dyn_cast<ObjCIvarRefExpr>(E))
3244 if (FieldDecl *Ivar = dyn_cast<FieldDecl>(IvarRef->getDecl()))
3245 if (Ivar->isBitField())
3248 if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E))
3249 if (FieldDecl *Field = dyn_cast<FieldDecl>(DeclRef->getDecl()))
3250 if (Field->isBitField())
3253 if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(E)) {
3254 if (BinOp->isAssignmentOp() && BinOp->getLHS())
3255 return BinOp->getLHS()->getSourceBitField();
3257 if (BinOp->getOpcode() == BO_Comma && BinOp->getRHS())
3258 return BinOp->getRHS()->getSourceBitField();
3264 bool Expr::refersToVectorElement() const {
3265 const Expr *E = this->IgnoreParens();
3267 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3268 if (ICE->getValueKind() != VK_RValue &&
3269 ICE->getCastKind() == CK_NoOp)
3270 E = ICE->getSubExpr()->IgnoreParens();
3275 if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E))
3276 return ASE->getBase()->getType()->isVectorType();
3278 if (isa<ExtVectorElementExpr>(E))
3284 /// isArrow - Return true if the base expression is a pointer to vector,
3285 /// return false if the base expression is a vector.
3286 bool ExtVectorElementExpr::isArrow() const {
3287 return getBase()->getType()->isPointerType();
3290 unsigned ExtVectorElementExpr::getNumElements() const {
3291 if (const VectorType *VT = getType()->getAs<VectorType>())
3292 return VT->getNumElements();
3296 /// containsDuplicateElements - Return true if any element access is repeated.
3297 bool ExtVectorElementExpr::containsDuplicateElements() const {
3298 // FIXME: Refactor this code to an accessor on the AST node which returns the
3299 // "type" of component access, and share with code below and in Sema.
3300 StringRef Comp = Accessor->getName();
3302 // Halving swizzles do not contain duplicate elements.
3303 if (Comp == "hi" || Comp == "lo" || Comp == "even" || Comp == "odd")
3306 // Advance past s-char prefix on hex swizzles.
3307 if (Comp[0] == 's' || Comp[0] == 'S')
3308 Comp = Comp.substr(1);
3310 for (unsigned i = 0, e = Comp.size(); i != e; ++i)
3311 if (Comp.substr(i + 1).find(Comp[i]) != StringRef::npos)
3317 /// getEncodedElementAccess - We encode the fields as a llvm ConstantArray.
3318 void ExtVectorElementExpr::getEncodedElementAccess(
3319 SmallVectorImpl<unsigned> &Elts) const {
3320 StringRef Comp = Accessor->getName();
3321 if (Comp[0] == 's' || Comp[0] == 'S')
3322 Comp = Comp.substr(1);
3324 bool isHi = Comp == "hi";
3325 bool isLo = Comp == "lo";
3326 bool isEven = Comp == "even";
3327 bool isOdd = Comp == "odd";
3329 for (unsigned i = 0, e = getNumElements(); i != e; ++i) {
3341 Index = ExtVectorType::getAccessorIdx(Comp[i]);
3343 Elts.push_back(Index);
3347 ObjCMessageExpr::ObjCMessageExpr(QualType T,
3349 SourceLocation LBracLoc,
3350 SourceLocation SuperLoc,
3351 bool IsInstanceSuper,
3354 ArrayRef<SourceLocation> SelLocs,
3355 SelectorLocationsKind SelLocsK,
3356 ObjCMethodDecl *Method,
3357 ArrayRef<Expr *> Args,
3358 SourceLocation RBracLoc,
3360 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary,
3361 /*TypeDependent=*/false, /*ValueDependent=*/false,
3362 /*InstantiationDependent=*/false,
3363 /*ContainsUnexpandedParameterPack=*/false),
3364 SelectorOrMethod(reinterpret_cast<uintptr_t>(Method? Method
3365 : Sel.getAsOpaquePtr())),
3366 Kind(IsInstanceSuper? SuperInstance : SuperClass),
3367 HasMethod(Method != nullptr), IsDelegateInitCall(false),
3368 IsImplicit(isImplicit), SuperLoc(SuperLoc), LBracLoc(LBracLoc),
3371 initArgsAndSelLocs(Args, SelLocs, SelLocsK);
3372 setReceiverPointer(SuperType.getAsOpaquePtr());
3375 ObjCMessageExpr::ObjCMessageExpr(QualType T,
3377 SourceLocation LBracLoc,
3378 TypeSourceInfo *Receiver,
3380 ArrayRef<SourceLocation> SelLocs,
3381 SelectorLocationsKind SelLocsK,
3382 ObjCMethodDecl *Method,
3383 ArrayRef<Expr *> Args,
3384 SourceLocation RBracLoc,
3386 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary, T->isDependentType(),
3387 T->isDependentType(), T->isInstantiationDependentType(),
3388 T->containsUnexpandedParameterPack()),
3389 SelectorOrMethod(reinterpret_cast<uintptr_t>(Method? Method
3390 : Sel.getAsOpaquePtr())),
3392 HasMethod(Method != nullptr), IsDelegateInitCall(false),
3393 IsImplicit(isImplicit), LBracLoc(LBracLoc), RBracLoc(RBracLoc)
3395 initArgsAndSelLocs(Args, SelLocs, SelLocsK);
3396 setReceiverPointer(Receiver);
3399 ObjCMessageExpr::ObjCMessageExpr(QualType T,
3401 SourceLocation LBracLoc,
3404 ArrayRef<SourceLocation> SelLocs,
3405 SelectorLocationsKind SelLocsK,
3406 ObjCMethodDecl *Method,
3407 ArrayRef<Expr *> Args,
3408 SourceLocation RBracLoc,
3410 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary, Receiver->isTypeDependent(),
3411 Receiver->isTypeDependent(),
3412 Receiver->isInstantiationDependent(),
3413 Receiver->containsUnexpandedParameterPack()),
3414 SelectorOrMethod(reinterpret_cast<uintptr_t>(Method? Method
3415 : Sel.getAsOpaquePtr())),
3417 HasMethod(Method != nullptr), IsDelegateInitCall(false),
3418 IsImplicit(isImplicit), LBracLoc(LBracLoc), RBracLoc(RBracLoc)
3420 initArgsAndSelLocs(Args, SelLocs, SelLocsK);
3421 setReceiverPointer(Receiver);
3424 void ObjCMessageExpr::initArgsAndSelLocs(ArrayRef<Expr *> Args,
3425 ArrayRef<SourceLocation> SelLocs,
3426 SelectorLocationsKind SelLocsK) {
3427 setNumArgs(Args.size());
3428 Expr **MyArgs = getArgs();
3429 for (unsigned I = 0; I != Args.size(); ++I) {
3430 if (Args[I]->isTypeDependent())
3431 ExprBits.TypeDependent = true;
3432 if (Args[I]->isValueDependent())
3433 ExprBits.ValueDependent = true;
3434 if (Args[I]->isInstantiationDependent())
3435 ExprBits.InstantiationDependent = true;
3436 if (Args[I]->containsUnexpandedParameterPack())
3437 ExprBits.ContainsUnexpandedParameterPack = true;
3439 MyArgs[I] = Args[I];
3442 SelLocsKind = SelLocsK;
3443 if (!isImplicit()) {
3444 if (SelLocsK == SelLoc_NonStandard)
3445 std::copy(SelLocs.begin(), SelLocs.end(), getStoredSelLocs());
3449 ObjCMessageExpr *ObjCMessageExpr::Create(const ASTContext &Context, QualType T,
3451 SourceLocation LBracLoc,
3452 SourceLocation SuperLoc,
3453 bool IsInstanceSuper,
3456 ArrayRef<SourceLocation> SelLocs,
3457 ObjCMethodDecl *Method,
3458 ArrayRef<Expr *> Args,
3459 SourceLocation RBracLoc,
3461 assert((!SelLocs.empty() || isImplicit) &&
3462 "No selector locs for non-implicit message");
3463 ObjCMessageExpr *Mem;
3464 SelectorLocationsKind SelLocsK = SelectorLocationsKind();
3466 Mem = alloc(Context, Args.size(), 0);
3468 Mem = alloc(Context, Args, RBracLoc, SelLocs, Sel, SelLocsK);
3469 return new (Mem) ObjCMessageExpr(T, VK, LBracLoc, SuperLoc, IsInstanceSuper,
3470 SuperType, Sel, SelLocs, SelLocsK,
3471 Method, Args, RBracLoc, isImplicit);
3474 ObjCMessageExpr *ObjCMessageExpr::Create(const ASTContext &Context, QualType T,
3476 SourceLocation LBracLoc,
3477 TypeSourceInfo *Receiver,
3479 ArrayRef<SourceLocation> SelLocs,
3480 ObjCMethodDecl *Method,
3481 ArrayRef<Expr *> Args,
3482 SourceLocation RBracLoc,
3484 assert((!SelLocs.empty() || isImplicit) &&
3485 "No selector locs for non-implicit message");
3486 ObjCMessageExpr *Mem;
3487 SelectorLocationsKind SelLocsK = SelectorLocationsKind();
3489 Mem = alloc(Context, Args.size(), 0);
3491 Mem = alloc(Context, Args, RBracLoc, SelLocs, Sel, SelLocsK);
3492 return new (Mem) ObjCMessageExpr(T, VK, LBracLoc, Receiver, Sel,
3493 SelLocs, SelLocsK, Method, Args, RBracLoc,
3497 ObjCMessageExpr *ObjCMessageExpr::Create(const ASTContext &Context, QualType T,
3499 SourceLocation LBracLoc,
3502 ArrayRef<SourceLocation> SelLocs,
3503 ObjCMethodDecl *Method,
3504 ArrayRef<Expr *> Args,
3505 SourceLocation RBracLoc,
3507 assert((!SelLocs.empty() || isImplicit) &&
3508 "No selector locs for non-implicit message");
3509 ObjCMessageExpr *Mem;
3510 SelectorLocationsKind SelLocsK = SelectorLocationsKind();
3512 Mem = alloc(Context, Args.size(), 0);
3514 Mem = alloc(Context, Args, RBracLoc, SelLocs, Sel, SelLocsK);
3515 return new (Mem) ObjCMessageExpr(T, VK, LBracLoc, Receiver, Sel,
3516 SelLocs, SelLocsK, Method, Args, RBracLoc,
3520 ObjCMessageExpr *ObjCMessageExpr::CreateEmpty(const ASTContext &Context,
3522 unsigned NumStoredSelLocs) {
3523 ObjCMessageExpr *Mem = alloc(Context, NumArgs, NumStoredSelLocs);
3524 return new (Mem) ObjCMessageExpr(EmptyShell(), NumArgs);
3527 ObjCMessageExpr *ObjCMessageExpr::alloc(const ASTContext &C,
3528 ArrayRef<Expr *> Args,
3529 SourceLocation RBraceLoc,
3530 ArrayRef<SourceLocation> SelLocs,
3532 SelectorLocationsKind &SelLocsK) {
3533 SelLocsK = hasStandardSelectorLocs(Sel, SelLocs, Args, RBraceLoc);
3534 unsigned NumStoredSelLocs = (SelLocsK == SelLoc_NonStandard) ? SelLocs.size()
3536 return alloc(C, Args.size(), NumStoredSelLocs);
3539 ObjCMessageExpr *ObjCMessageExpr::alloc(const ASTContext &C,
3541 unsigned NumStoredSelLocs) {
3542 unsigned Size = sizeof(ObjCMessageExpr) + sizeof(void *) +
3543 NumArgs * sizeof(Expr *) + NumStoredSelLocs * sizeof(SourceLocation);
3544 return (ObjCMessageExpr *)C.Allocate(Size,
3545 llvm::AlignOf<ObjCMessageExpr>::Alignment);
3548 void ObjCMessageExpr::getSelectorLocs(
3549 SmallVectorImpl<SourceLocation> &SelLocs) const {
3550 for (unsigned i = 0, e = getNumSelectorLocs(); i != e; ++i)
3551 SelLocs.push_back(getSelectorLoc(i));
3554 SourceRange ObjCMessageExpr::getReceiverRange() const {
3555 switch (getReceiverKind()) {
3557 return getInstanceReceiver()->getSourceRange();
3560 return getClassReceiverTypeInfo()->getTypeLoc().getSourceRange();
3564 return getSuperLoc();
3567 llvm_unreachable("Invalid ReceiverKind!");
3570 Selector ObjCMessageExpr::getSelector() const {
3572 return reinterpret_cast<const ObjCMethodDecl *>(SelectorOrMethod)
3574 return Selector(SelectorOrMethod);
3577 QualType ObjCMessageExpr::getReceiverType() const {
3578 switch (getReceiverKind()) {
3580 return getInstanceReceiver()->getType();
3582 return getClassReceiver();
3585 return getSuperType();
3588 llvm_unreachable("unexpected receiver kind");
3591 ObjCInterfaceDecl *ObjCMessageExpr::getReceiverInterface() const {
3592 QualType T = getReceiverType();
3594 if (const ObjCObjectPointerType *Ptr = T->getAs<ObjCObjectPointerType>())
3595 return Ptr->getInterfaceDecl();
3597 if (const ObjCObjectType *Ty = T->getAs<ObjCObjectType>())
3598 return Ty->getInterface();
3603 StringRef ObjCBridgedCastExpr::getBridgeKindName() const {
3604 switch (getBridgeKind()) {
3607 case OBC_BridgeTransfer:
3608 return "__bridge_transfer";
3609 case OBC_BridgeRetained:
3610 return "__bridge_retained";
3613 llvm_unreachable("Invalid BridgeKind!");
3616 ShuffleVectorExpr::ShuffleVectorExpr(const ASTContext &C, ArrayRef<Expr*> args,
3617 QualType Type, SourceLocation BLoc,
3619 : Expr(ShuffleVectorExprClass, Type, VK_RValue, OK_Ordinary,
3620 Type->isDependentType(), Type->isDependentType(),
3621 Type->isInstantiationDependentType(),
3622 Type->containsUnexpandedParameterPack()),
3623 BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(args.size())
3625 SubExprs = new (C) Stmt*[args.size()];
3626 for (unsigned i = 0; i != args.size(); i++) {
3627 if (args[i]->isTypeDependent())
3628 ExprBits.TypeDependent = true;
3629 if (args[i]->isValueDependent())
3630 ExprBits.ValueDependent = true;
3631 if (args[i]->isInstantiationDependent())
3632 ExprBits.InstantiationDependent = true;
3633 if (args[i]->containsUnexpandedParameterPack())
3634 ExprBits.ContainsUnexpandedParameterPack = true;
3636 SubExprs[i] = args[i];
3640 void ShuffleVectorExpr::setExprs(const ASTContext &C, ArrayRef<Expr *> Exprs) {
3641 if (SubExprs) C.Deallocate(SubExprs);
3643 this->NumExprs = Exprs.size();
3644 SubExprs = new (C) Stmt*[NumExprs];
3645 memcpy(SubExprs, Exprs.data(), sizeof(Expr *) * Exprs.size());
3648 GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
3649 SourceLocation GenericLoc, Expr *ControllingExpr,
3650 ArrayRef<TypeSourceInfo*> AssocTypes,
3651 ArrayRef<Expr*> AssocExprs,
3652 SourceLocation DefaultLoc,
3653 SourceLocation RParenLoc,
3654 bool ContainsUnexpandedParameterPack,
3655 unsigned ResultIndex)
3656 : Expr(GenericSelectionExprClass,
3657 AssocExprs[ResultIndex]->getType(),
3658 AssocExprs[ResultIndex]->getValueKind(),
3659 AssocExprs[ResultIndex]->getObjectKind(),
3660 AssocExprs[ResultIndex]->isTypeDependent(),
3661 AssocExprs[ResultIndex]->isValueDependent(),
3662 AssocExprs[ResultIndex]->isInstantiationDependent(),
3663 ContainsUnexpandedParameterPack),
3664 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3665 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3666 NumAssocs(AssocExprs.size()), ResultIndex(ResultIndex),
3667 GenericLoc(GenericLoc), DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3668 SubExprs[CONTROLLING] = ControllingExpr;
3669 assert(AssocTypes.size() == AssocExprs.size());
3670 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3671 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3674 GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
3675 SourceLocation GenericLoc, Expr *ControllingExpr,
3676 ArrayRef<TypeSourceInfo*> AssocTypes,
3677 ArrayRef<Expr*> AssocExprs,
3678 SourceLocation DefaultLoc,
3679 SourceLocation RParenLoc,
3680 bool ContainsUnexpandedParameterPack)
3681 : Expr(GenericSelectionExprClass,
3682 Context.DependentTy,
3685 /*isTypeDependent=*/true,
3686 /*isValueDependent=*/true,
3687 /*isInstantiationDependent=*/true,
3688 ContainsUnexpandedParameterPack),
3689 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3690 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3691 NumAssocs(AssocExprs.size()), ResultIndex(-1U), GenericLoc(GenericLoc),
3692 DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3693 SubExprs[CONTROLLING] = ControllingExpr;
3694 assert(AssocTypes.size() == AssocExprs.size());
3695 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3696 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3699 //===----------------------------------------------------------------------===//
3700 // DesignatedInitExpr
3701 //===----------------------------------------------------------------------===//
3703 IdentifierInfo *DesignatedInitExpr::Designator::getFieldName() const {
3704 assert(Kind == FieldDesignator && "Only valid on a field designator");
3705 if (Field.NameOrField & 0x01)
3706 return reinterpret_cast<IdentifierInfo *>(Field.NameOrField&~0x01);
3708 return getField()->getIdentifier();
3711 DesignatedInitExpr::DesignatedInitExpr(const ASTContext &C, QualType Ty,
3712 unsigned NumDesignators,
3713 const Designator *Designators,
3714 SourceLocation EqualOrColonLoc,
3716 ArrayRef<Expr*> IndexExprs,
3718 : Expr(DesignatedInitExprClass, Ty,
3719 Init->getValueKind(), Init->getObjectKind(),
3720 Init->isTypeDependent(), Init->isValueDependent(),
3721 Init->isInstantiationDependent(),
3722 Init->containsUnexpandedParameterPack()),
3723 EqualOrColonLoc(EqualOrColonLoc), GNUSyntax(GNUSyntax),
3724 NumDesignators(NumDesignators), NumSubExprs(IndexExprs.size() + 1) {
3725 this->Designators = new (C) Designator[NumDesignators];
3727 // Record the initializer itself.
3728 child_range Child = children();
3731 // Copy the designators and their subexpressions, computing
3732 // value-dependence along the way.
3733 unsigned IndexIdx = 0;
3734 for (unsigned I = 0; I != NumDesignators; ++I) {
3735 this->Designators[I] = Designators[I];
3737 if (this->Designators[I].isArrayDesignator()) {
3738 // Compute type- and value-dependence.
3739 Expr *Index = IndexExprs[IndexIdx];
3740 if (Index->isTypeDependent() || Index->isValueDependent())
3741 ExprBits.ValueDependent = true;
3742 if (Index->isInstantiationDependent())
3743 ExprBits.InstantiationDependent = true;
3744 // Propagate unexpanded parameter packs.
3745 if (Index->containsUnexpandedParameterPack())
3746 ExprBits.ContainsUnexpandedParameterPack = true;
3748 // Copy the index expressions into permanent storage.
3749 *Child++ = IndexExprs[IndexIdx++];
3750 } else if (this->Designators[I].isArrayRangeDesignator()) {
3751 // Compute type- and value-dependence.
3752 Expr *Start = IndexExprs[IndexIdx];
3753 Expr *End = IndexExprs[IndexIdx + 1];
3754 if (Start->isTypeDependent() || Start->isValueDependent() ||
3755 End->isTypeDependent() || End->isValueDependent()) {
3756 ExprBits.ValueDependent = true;
3757 ExprBits.InstantiationDependent = true;
3758 } else if (Start->isInstantiationDependent() ||
3759 End->isInstantiationDependent()) {
3760 ExprBits.InstantiationDependent = true;
3763 // Propagate unexpanded parameter packs.
3764 if (Start->containsUnexpandedParameterPack() ||
3765 End->containsUnexpandedParameterPack())
3766 ExprBits.ContainsUnexpandedParameterPack = true;
3768 // Copy the start/end expressions into permanent storage.
3769 *Child++ = IndexExprs[IndexIdx++];
3770 *Child++ = IndexExprs[IndexIdx++];
3774 assert(IndexIdx == IndexExprs.size() && "Wrong number of index expressions");
3777 DesignatedInitExpr *
3778 DesignatedInitExpr::Create(const ASTContext &C, Designator *Designators,
3779 unsigned NumDesignators,
3780 ArrayRef<Expr*> IndexExprs,
3781 SourceLocation ColonOrEqualLoc,
3782 bool UsesColonSyntax, Expr *Init) {
3783 void *Mem = C.Allocate(sizeof(DesignatedInitExpr) +
3784 sizeof(Stmt *) * (IndexExprs.size() + 1), 8);
3785 return new (Mem) DesignatedInitExpr(C, C.VoidTy, NumDesignators, Designators,
3786 ColonOrEqualLoc, UsesColonSyntax,
3790 DesignatedInitExpr *DesignatedInitExpr::CreateEmpty(const ASTContext &C,
3791 unsigned NumIndexExprs) {
3792 void *Mem = C.Allocate(sizeof(DesignatedInitExpr) +
3793 sizeof(Stmt *) * (NumIndexExprs + 1), 8);
3794 return new (Mem) DesignatedInitExpr(NumIndexExprs + 1);
3797 void DesignatedInitExpr::setDesignators(const ASTContext &C,
3798 const Designator *Desigs,
3799 unsigned NumDesigs) {
3800 Designators = new (C) Designator[NumDesigs];
3801 NumDesignators = NumDesigs;
3802 for (unsigned I = 0; I != NumDesigs; ++I)
3803 Designators[I] = Desigs[I];
3806 SourceRange DesignatedInitExpr::getDesignatorsSourceRange() const {
3807 DesignatedInitExpr *DIE = const_cast<DesignatedInitExpr*>(this);
3809 return DIE->getDesignator(0)->getSourceRange();
3810 return SourceRange(DIE->getDesignator(0)->getLocStart(),
3811 DIE->getDesignator(size()-1)->getLocEnd());
3814 SourceLocation DesignatedInitExpr::getLocStart() const {
3815 SourceLocation StartLoc;
3817 *const_cast<DesignatedInitExpr*>(this)->designators_begin();
3818 if (First.isFieldDesignator()) {
3820 StartLoc = SourceLocation::getFromRawEncoding(First.Field.FieldLoc);
3822 StartLoc = SourceLocation::getFromRawEncoding(First.Field.DotLoc);
3825 SourceLocation::getFromRawEncoding(First.ArrayOrRange.LBracketLoc);
3829 SourceLocation DesignatedInitExpr::getLocEnd() const {
3830 return getInit()->getLocEnd();
3833 Expr *DesignatedInitExpr::getArrayIndex(const Designator& D) const {
3834 assert(D.Kind == Designator::ArrayDesignator && "Requires array designator");
3835 Stmt *const *SubExprs = reinterpret_cast<Stmt *const *>(this + 1);
3836 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 1));
3839 Expr *DesignatedInitExpr::getArrayRangeStart(const Designator &D) const {
3840 assert(D.Kind == Designator::ArrayRangeDesignator &&
3841 "Requires array range designator");
3842 Stmt *const *SubExprs = reinterpret_cast<Stmt *const *>(this + 1);
3843 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 1));
3846 Expr *DesignatedInitExpr::getArrayRangeEnd(const Designator &D) const {
3847 assert(D.Kind == Designator::ArrayRangeDesignator &&
3848 "Requires array range designator");
3849 Stmt *const *SubExprs = reinterpret_cast<Stmt *const *>(this + 1);
3850 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 2));
3853 /// \brief Replaces the designator at index @p Idx with the series
3854 /// of designators in [First, Last).
3855 void DesignatedInitExpr::ExpandDesignator(const ASTContext &C, unsigned Idx,
3856 const Designator *First,
3857 const Designator *Last) {
3858 unsigned NumNewDesignators = Last - First;
3859 if (NumNewDesignators == 0) {
3860 std::copy_backward(Designators + Idx + 1,
3861 Designators + NumDesignators,
3863 --NumNewDesignators;
3865 } else if (NumNewDesignators == 1) {
3866 Designators[Idx] = *First;
3870 Designator *NewDesignators
3871 = new (C) Designator[NumDesignators - 1 + NumNewDesignators];
3872 std::copy(Designators, Designators + Idx, NewDesignators);
3873 std::copy(First, Last, NewDesignators + Idx);
3874 std::copy(Designators + Idx + 1, Designators + NumDesignators,
3875 NewDesignators + Idx + NumNewDesignators);
3876 Designators = NewDesignators;
3877 NumDesignators = NumDesignators - 1 + NumNewDesignators;
3880 ParenListExpr::ParenListExpr(const ASTContext& C, SourceLocation lparenloc,
3881 ArrayRef<Expr*> exprs,
3882 SourceLocation rparenloc)
3883 : Expr(ParenListExprClass, QualType(), VK_RValue, OK_Ordinary,
3884 false, false, false, false),
3885 NumExprs(exprs.size()), LParenLoc(lparenloc), RParenLoc(rparenloc) {
3886 Exprs = new (C) Stmt*[exprs.size()];
3887 for (unsigned i = 0; i != exprs.size(); ++i) {
3888 if (exprs[i]->isTypeDependent())
3889 ExprBits.TypeDependent = true;
3890 if (exprs[i]->isValueDependent())
3891 ExprBits.ValueDependent = true;
3892 if (exprs[i]->isInstantiationDependent())
3893 ExprBits.InstantiationDependent = true;
3894 if (exprs[i]->containsUnexpandedParameterPack())
3895 ExprBits.ContainsUnexpandedParameterPack = true;
3897 Exprs[i] = exprs[i];
3901 const OpaqueValueExpr *OpaqueValueExpr::findInCopyConstruct(const Expr *e) {
3902 if (const ExprWithCleanups *ewc = dyn_cast<ExprWithCleanups>(e))
3903 e = ewc->getSubExpr();
3904 if (const MaterializeTemporaryExpr *m = dyn_cast<MaterializeTemporaryExpr>(e))
3905 e = m->GetTemporaryExpr();
3906 e = cast<CXXConstructExpr>(e)->getArg(0);
3907 while (const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(e))
3908 e = ice->getSubExpr();
3909 return cast<OpaqueValueExpr>(e);
3912 PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &Context,
3914 unsigned numSemanticExprs) {
3915 void *buffer = Context.Allocate(sizeof(PseudoObjectExpr) +
3916 (1 + numSemanticExprs) * sizeof(Expr*),
3917 llvm::alignOf<PseudoObjectExpr>());
3918 return new(buffer) PseudoObjectExpr(sh, numSemanticExprs);
3921 PseudoObjectExpr::PseudoObjectExpr(EmptyShell shell, unsigned numSemanticExprs)
3922 : Expr(PseudoObjectExprClass, shell) {
3923 PseudoObjectExprBits.NumSubExprs = numSemanticExprs + 1;
3926 PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &C, Expr *syntax,
3927 ArrayRef<Expr*> semantics,
3928 unsigned resultIndex) {
3929 assert(syntax && "no syntactic expression!");
3930 assert(semantics.size() && "no semantic expressions!");
3934 if (resultIndex == NoResult) {
3938 assert(resultIndex < semantics.size());
3939 type = semantics[resultIndex]->getType();
3940 VK = semantics[resultIndex]->getValueKind();
3941 assert(semantics[resultIndex]->getObjectKind() == OK_Ordinary);
3944 void *buffer = C.Allocate(sizeof(PseudoObjectExpr) +
3945 (1 + semantics.size()) * sizeof(Expr*),
3946 llvm::alignOf<PseudoObjectExpr>());
3947 return new(buffer) PseudoObjectExpr(type, VK, syntax, semantics,
3951 PseudoObjectExpr::PseudoObjectExpr(QualType type, ExprValueKind VK,
3952 Expr *syntax, ArrayRef<Expr*> semantics,
3953 unsigned resultIndex)
3954 : Expr(PseudoObjectExprClass, type, VK, OK_Ordinary,
3955 /*filled in at end of ctor*/ false, false, false, false) {
3956 PseudoObjectExprBits.NumSubExprs = semantics.size() + 1;
3957 PseudoObjectExprBits.ResultIndex = resultIndex + 1;
3959 for (unsigned i = 0, e = semantics.size() + 1; i != e; ++i) {
3960 Expr *E = (i == 0 ? syntax : semantics[i-1]);
3961 getSubExprsBuffer()[i] = E;
3963 if (E->isTypeDependent())
3964 ExprBits.TypeDependent = true;
3965 if (E->isValueDependent())
3966 ExprBits.ValueDependent = true;
3967 if (E->isInstantiationDependent())
3968 ExprBits.InstantiationDependent = true;
3969 if (E->containsUnexpandedParameterPack())
3970 ExprBits.ContainsUnexpandedParameterPack = true;
3972 if (isa<OpaqueValueExpr>(E))
3973 assert(cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr &&
3974 "opaque-value semantic expressions for pseudo-object "
3975 "operations must have sources");
3979 //===----------------------------------------------------------------------===//
3981 //===----------------------------------------------------------------------===//
3983 Expr* ExprIterator::operator[](size_t idx) { return cast<Expr>(I[idx]); }
3984 Expr* ExprIterator::operator*() const { return cast<Expr>(*I); }
3985 Expr* ExprIterator::operator->() const { return cast<Expr>(*I); }
3986 const Expr* ConstExprIterator::operator[](size_t idx) const {
3987 return cast<Expr>(I[idx]);
3989 const Expr* ConstExprIterator::operator*() const { return cast<Expr>(*I); }
3990 const Expr* ConstExprIterator::operator->() const { return cast<Expr>(*I); }
3992 //===----------------------------------------------------------------------===//
3993 // Child Iterators for iterating over subexpressions/substatements
3994 //===----------------------------------------------------------------------===//
3996 // UnaryExprOrTypeTraitExpr
3997 Stmt::child_range UnaryExprOrTypeTraitExpr::children() {
3998 // If this is of a type and the type is a VLA type (and not a typedef), the
3999 // size expression of the VLA needs to be treated as an executable expression.
4000 // Why isn't this weirdness documented better in StmtIterator?
4001 if (isArgumentType()) {
4002 if (const VariableArrayType* T = dyn_cast<VariableArrayType>(
4003 getArgumentType().getTypePtr()))
4004 return child_range(child_iterator(T), child_iterator());
4005 return child_range();
4007 return child_range(&Argument.Ex, &Argument.Ex + 1);
4011 Stmt::child_range ObjCMessageExpr::children() {
4013 if (getReceiverKind() == Instance)
4014 begin = reinterpret_cast<Stmt **>(this + 1);
4016 begin = reinterpret_cast<Stmt **>(getArgs());
4017 return child_range(begin,
4018 reinterpret_cast<Stmt **>(getArgs() + getNumArgs()));
4021 ObjCArrayLiteral::ObjCArrayLiteral(ArrayRef<Expr *> Elements,
4022 QualType T, ObjCMethodDecl *Method,
4024 : Expr(ObjCArrayLiteralClass, T, VK_RValue, OK_Ordinary,
4025 false, false, false, false),
4026 NumElements(Elements.size()), Range(SR), ArrayWithObjectsMethod(Method)
4028 Expr **SaveElements = getElements();
4029 for (unsigned I = 0, N = Elements.size(); I != N; ++I) {
4030 if (Elements[I]->isTypeDependent() || Elements[I]->isValueDependent())
4031 ExprBits.ValueDependent = true;
4032 if (Elements[I]->isInstantiationDependent())
4033 ExprBits.InstantiationDependent = true;
4034 if (Elements[I]->containsUnexpandedParameterPack())
4035 ExprBits.ContainsUnexpandedParameterPack = true;
4037 SaveElements[I] = Elements[I];
4041 ObjCArrayLiteral *ObjCArrayLiteral::Create(const ASTContext &C,
4042 ArrayRef<Expr *> Elements,
4043 QualType T, ObjCMethodDecl * Method,
4045 void *Mem = C.Allocate(sizeof(ObjCArrayLiteral)
4046 + Elements.size() * sizeof(Expr *));
4047 return new (Mem) ObjCArrayLiteral(Elements, T, Method, SR);
4050 ObjCArrayLiteral *ObjCArrayLiteral::CreateEmpty(const ASTContext &C,
4051 unsigned NumElements) {
4053 void *Mem = C.Allocate(sizeof(ObjCArrayLiteral)
4054 + NumElements * sizeof(Expr *));
4055 return new (Mem) ObjCArrayLiteral(EmptyShell(), NumElements);
4058 ObjCDictionaryLiteral::ObjCDictionaryLiteral(
4059 ArrayRef<ObjCDictionaryElement> VK,
4060 bool HasPackExpansions,
4061 QualType T, ObjCMethodDecl *method,
4063 : Expr(ObjCDictionaryLiteralClass, T, VK_RValue, OK_Ordinary, false, false,
4065 NumElements(VK.size()), HasPackExpansions(HasPackExpansions), Range(SR),
4066 DictWithObjectsMethod(method)
4068 KeyValuePair *KeyValues = getKeyValues();
4069 ExpansionData *Expansions = getExpansionData();
4070 for (unsigned I = 0; I < NumElements; I++) {
4071 if (VK[I].Key->isTypeDependent() || VK[I].Key->isValueDependent() ||
4072 VK[I].Value->isTypeDependent() || VK[I].Value->isValueDependent())
4073 ExprBits.ValueDependent = true;
4074 if (VK[I].Key->isInstantiationDependent() ||
4075 VK[I].Value->isInstantiationDependent())
4076 ExprBits.InstantiationDependent = true;
4077 if (VK[I].EllipsisLoc.isInvalid() &&
4078 (VK[I].Key->containsUnexpandedParameterPack() ||
4079 VK[I].Value->containsUnexpandedParameterPack()))
4080 ExprBits.ContainsUnexpandedParameterPack = true;
4082 KeyValues[I].Key = VK[I].Key;
4083 KeyValues[I].Value = VK[I].Value;
4085 Expansions[I].EllipsisLoc = VK[I].EllipsisLoc;
4086 if (VK[I].NumExpansions)
4087 Expansions[I].NumExpansionsPlusOne = *VK[I].NumExpansions + 1;
4089 Expansions[I].NumExpansionsPlusOne = 0;
4094 ObjCDictionaryLiteral *
4095 ObjCDictionaryLiteral::Create(const ASTContext &C,
4096 ArrayRef<ObjCDictionaryElement> VK,
4097 bool HasPackExpansions,
4098 QualType T, ObjCMethodDecl *method,
4100 unsigned ExpansionsSize = 0;
4101 if (HasPackExpansions)
4102 ExpansionsSize = sizeof(ExpansionData) * VK.size();
4104 void *Mem = C.Allocate(sizeof(ObjCDictionaryLiteral) +
4105 sizeof(KeyValuePair) * VK.size() + ExpansionsSize);
4106 return new (Mem) ObjCDictionaryLiteral(VK, HasPackExpansions, T, method, SR);
4109 ObjCDictionaryLiteral *
4110 ObjCDictionaryLiteral::CreateEmpty(const ASTContext &C, unsigned NumElements,
4111 bool HasPackExpansions) {
4112 unsigned ExpansionsSize = 0;
4113 if (HasPackExpansions)
4114 ExpansionsSize = sizeof(ExpansionData) * NumElements;
4115 void *Mem = C.Allocate(sizeof(ObjCDictionaryLiteral) +
4116 sizeof(KeyValuePair) * NumElements + ExpansionsSize);
4117 return new (Mem) ObjCDictionaryLiteral(EmptyShell(), NumElements,
4121 ObjCSubscriptRefExpr *ObjCSubscriptRefExpr::Create(const ASTContext &C,
4123 Expr *key, QualType T,
4124 ObjCMethodDecl *getMethod,
4125 ObjCMethodDecl *setMethod,
4126 SourceLocation RB) {
4127 void *Mem = C.Allocate(sizeof(ObjCSubscriptRefExpr));
4128 return new (Mem) ObjCSubscriptRefExpr(base, key, T, VK_LValue,
4130 getMethod, setMethod, RB);
4133 AtomicExpr::AtomicExpr(SourceLocation BLoc, ArrayRef<Expr*> args,
4134 QualType t, AtomicOp op, SourceLocation RP)
4135 : Expr(AtomicExprClass, t, VK_RValue, OK_Ordinary,
4136 false, false, false, false),
4137 NumSubExprs(args.size()), BuiltinLoc(BLoc), RParenLoc(RP), Op(op)
4139 assert(args.size() == getNumSubExprs(op) && "wrong number of subexpressions");
4140 for (unsigned i = 0; i != args.size(); i++) {
4141 if (args[i]->isTypeDependent())
4142 ExprBits.TypeDependent = true;
4143 if (args[i]->isValueDependent())
4144 ExprBits.ValueDependent = true;
4145 if (args[i]->isInstantiationDependent())
4146 ExprBits.InstantiationDependent = true;
4147 if (args[i]->containsUnexpandedParameterPack())
4148 ExprBits.ContainsUnexpandedParameterPack = true;
4150 SubExprs[i] = args[i];
4154 unsigned AtomicExpr::getNumSubExprs(AtomicOp Op) {
4156 case AO__c11_atomic_init:
4157 case AO__c11_atomic_load:
4158 case AO__atomic_load_n:
4161 case AO__c11_atomic_store:
4162 case AO__c11_atomic_exchange:
4163 case AO__atomic_load:
4164 case AO__atomic_store:
4165 case AO__atomic_store_n:
4166 case AO__atomic_exchange_n:
4167 case AO__c11_atomic_fetch_add:
4168 case AO__c11_atomic_fetch_sub:
4169 case AO__c11_atomic_fetch_and:
4170 case AO__c11_atomic_fetch_or:
4171 case AO__c11_atomic_fetch_xor:
4172 case AO__atomic_fetch_add:
4173 case AO__atomic_fetch_sub:
4174 case AO__atomic_fetch_and:
4175 case AO__atomic_fetch_or:
4176 case AO__atomic_fetch_xor:
4177 case AO__atomic_fetch_nand:
4178 case AO__atomic_add_fetch:
4179 case AO__atomic_sub_fetch:
4180 case AO__atomic_and_fetch:
4181 case AO__atomic_or_fetch:
4182 case AO__atomic_xor_fetch:
4183 case AO__atomic_nand_fetch:
4186 case AO__atomic_exchange:
4189 case AO__c11_atomic_compare_exchange_strong:
4190 case AO__c11_atomic_compare_exchange_weak:
4193 case AO__atomic_compare_exchange:
4194 case AO__atomic_compare_exchange_n:
4197 llvm_unreachable("unknown atomic op");