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: 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 expression 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 ExprBits.TypeDependent |= TypeDependent;
314 ExprBits.ValueDependent |= ValueDependent;
315 ExprBits.InstantiationDependent |= InstantiationDependent;
317 // Is the declaration a parameter pack?
318 if (getDecl()->isParameterPack())
319 ExprBits.ContainsUnexpandedParameterPack = true;
322 DeclRefExpr::DeclRefExpr(const ASTContext &Ctx,
323 NestedNameSpecifierLoc QualifierLoc,
324 SourceLocation TemplateKWLoc,
325 ValueDecl *D, bool RefersToEnclosingVariableOrCapture,
326 const DeclarationNameInfo &NameInfo,
328 const TemplateArgumentListInfo *TemplateArgs,
329 QualType T, ExprValueKind VK)
330 : Expr(DeclRefExprClass, T, VK, OK_Ordinary, false, false, false, false),
331 D(D), Loc(NameInfo.getLoc()), DNLoc(NameInfo.getInfo()) {
332 DeclRefExprBits.HasQualifier = QualifierLoc ? 1 : 0;
334 getInternalQualifierLoc() = QualifierLoc;
335 auto *NNS = QualifierLoc.getNestedNameSpecifier();
336 if (NNS->isInstantiationDependent())
337 ExprBits.InstantiationDependent = true;
338 if (NNS->containsUnexpandedParameterPack())
339 ExprBits.ContainsUnexpandedParameterPack = true;
341 DeclRefExprBits.HasFoundDecl = FoundD ? 1 : 0;
343 getInternalFoundDecl() = FoundD;
344 DeclRefExprBits.HasTemplateKWAndArgsInfo
345 = (TemplateArgs || TemplateKWLoc.isValid()) ? 1 : 0;
346 DeclRefExprBits.RefersToEnclosingVariableOrCapture =
347 RefersToEnclosingVariableOrCapture;
349 bool Dependent = false;
350 bool InstantiationDependent = false;
351 bool ContainsUnexpandedParameterPack = false;
352 getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc, *TemplateArgs,
354 InstantiationDependent,
355 ContainsUnexpandedParameterPack);
356 assert(!Dependent && "built a DeclRefExpr with dependent template args");
357 ExprBits.InstantiationDependent |= InstantiationDependent;
358 ExprBits.ContainsUnexpandedParameterPack |= ContainsUnexpandedParameterPack;
359 } else if (TemplateKWLoc.isValid()) {
360 getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc);
362 DeclRefExprBits.HadMultipleCandidates = 0;
364 computeDependence(Ctx);
367 DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
368 NestedNameSpecifierLoc QualifierLoc,
369 SourceLocation TemplateKWLoc,
371 bool RefersToEnclosingVariableOrCapture,
372 SourceLocation NameLoc,
376 const TemplateArgumentListInfo *TemplateArgs) {
377 return Create(Context, QualifierLoc, TemplateKWLoc, D,
378 RefersToEnclosingVariableOrCapture,
379 DeclarationNameInfo(D->getDeclName(), NameLoc),
380 T, VK, FoundD, TemplateArgs);
383 DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
384 NestedNameSpecifierLoc QualifierLoc,
385 SourceLocation TemplateKWLoc,
387 bool RefersToEnclosingVariableOrCapture,
388 const DeclarationNameInfo &NameInfo,
392 const TemplateArgumentListInfo *TemplateArgs) {
393 // Filter out cases where the found Decl is the same as the value refenenced.
397 std::size_t Size = sizeof(DeclRefExpr);
399 Size += sizeof(NestedNameSpecifierLoc);
401 Size += sizeof(NamedDecl *);
403 Size = llvm::RoundUpToAlignment(Size,
404 llvm::alignOf<ASTTemplateKWAndArgsInfo>());
405 Size += ASTTemplateKWAndArgsInfo::sizeFor(TemplateArgs->size());
406 } else if (TemplateKWLoc.isValid()) {
407 Size = llvm::RoundUpToAlignment(Size,
408 llvm::alignOf<ASTTemplateKWAndArgsInfo>());
409 Size += ASTTemplateKWAndArgsInfo::sizeFor(0);
412 void *Mem = Context.Allocate(Size, llvm::alignOf<DeclRefExpr>());
413 return new (Mem) DeclRefExpr(Context, QualifierLoc, TemplateKWLoc, D,
414 RefersToEnclosingVariableOrCapture,
415 NameInfo, FoundD, TemplateArgs, T, VK);
418 DeclRefExpr *DeclRefExpr::CreateEmpty(const ASTContext &Context,
421 bool HasTemplateKWAndArgsInfo,
422 unsigned NumTemplateArgs) {
423 std::size_t Size = sizeof(DeclRefExpr);
425 Size += sizeof(NestedNameSpecifierLoc);
427 Size += sizeof(NamedDecl *);
428 if (HasTemplateKWAndArgsInfo) {
429 Size = llvm::RoundUpToAlignment(Size,
430 llvm::alignOf<ASTTemplateKWAndArgsInfo>());
431 Size += ASTTemplateKWAndArgsInfo::sizeFor(NumTemplateArgs);
434 void *Mem = Context.Allocate(Size, llvm::alignOf<DeclRefExpr>());
435 return new (Mem) DeclRefExpr(EmptyShell());
438 SourceLocation DeclRefExpr::getLocStart() const {
440 return getQualifierLoc().getBeginLoc();
441 return getNameInfo().getLocStart();
443 SourceLocation DeclRefExpr::getLocEnd() const {
444 if (hasExplicitTemplateArgs())
445 return getRAngleLoc();
446 return getNameInfo().getLocEnd();
449 PredefinedExpr::PredefinedExpr(SourceLocation L, QualType FNTy, IdentType IT,
451 : Expr(PredefinedExprClass, FNTy, VK_LValue, OK_Ordinary,
452 FNTy->isDependentType(), FNTy->isDependentType(),
453 FNTy->isInstantiationDependentType(),
454 /*ContainsUnexpandedParameterPack=*/false),
455 Loc(L), Type(IT), FnName(SL) {}
457 StringLiteral *PredefinedExpr::getFunctionName() {
458 return cast_or_null<StringLiteral>(FnName);
461 StringRef PredefinedExpr::getIdentTypeName(PredefinedExpr::IdentType IT) {
466 return "__FUNCTION__";
468 return "__FUNCDNAME__";
470 return "L__FUNCTION__";
472 return "__PRETTY_FUNCTION__";
474 return "__FUNCSIG__";
475 case PrettyFunctionNoVirtual:
478 llvm_unreachable("Unknown ident type for PredefinedExpr");
481 // FIXME: Maybe this should use DeclPrinter with a special "print predefined
482 // expr" policy instead.
483 std::string PredefinedExpr::ComputeName(IdentType IT, const Decl *CurrentDecl) {
484 ASTContext &Context = CurrentDecl->getASTContext();
486 if (IT == PredefinedExpr::FuncDName) {
487 if (const NamedDecl *ND = dyn_cast<NamedDecl>(CurrentDecl)) {
488 std::unique_ptr<MangleContext> MC;
489 MC.reset(Context.createMangleContext());
491 if (MC->shouldMangleDeclName(ND)) {
492 SmallString<256> Buffer;
493 llvm::raw_svector_ostream Out(Buffer);
494 if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(ND))
495 MC->mangleCXXCtor(CD, Ctor_Base, Out);
496 else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(ND))
497 MC->mangleCXXDtor(DD, Dtor_Base, Out);
499 MC->mangleName(ND, Out);
502 if (!Buffer.empty() && Buffer.front() == '\01')
503 return Buffer.substr(1);
506 return ND->getIdentifier()->getName();
510 if (auto *BD = dyn_cast<BlockDecl>(CurrentDecl)) {
511 std::unique_ptr<MangleContext> MC;
512 MC.reset(Context.createMangleContext());
513 SmallString<256> Buffer;
514 llvm::raw_svector_ostream Out(Buffer);
515 auto DC = CurrentDecl->getDeclContext();
516 if (DC->isFileContext())
517 MC->mangleGlobalBlock(BD, /*ID*/ nullptr, Out);
518 else if (const auto *CD = dyn_cast<CXXConstructorDecl>(DC))
519 MC->mangleCtorBlock(CD, /*CT*/ Ctor_Complete, BD, Out);
520 else if (const auto *DD = dyn_cast<CXXDestructorDecl>(DC))
521 MC->mangleDtorBlock(DD, /*DT*/ Dtor_Complete, BD, Out);
523 MC->mangleBlock(DC, BD, Out);
526 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(CurrentDecl)) {
527 if (IT != PrettyFunction && IT != PrettyFunctionNoVirtual && IT != FuncSig)
528 return FD->getNameAsString();
530 SmallString<256> Name;
531 llvm::raw_svector_ostream Out(Name);
533 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
534 if (MD->isVirtual() && IT != PrettyFunctionNoVirtual)
540 PrintingPolicy Policy(Context.getLangOpts());
542 llvm::raw_string_ostream POut(Proto);
544 const FunctionDecl *Decl = FD;
545 if (const FunctionDecl* Pattern = FD->getTemplateInstantiationPattern())
547 const FunctionType *AFT = Decl->getType()->getAs<FunctionType>();
548 const FunctionProtoType *FT = nullptr;
549 if (FD->hasWrittenPrototype())
550 FT = dyn_cast<FunctionProtoType>(AFT);
553 switch (FT->getCallConv()) {
554 case CC_C: POut << "__cdecl "; break;
555 case CC_X86StdCall: POut << "__stdcall "; break;
556 case CC_X86FastCall: POut << "__fastcall "; break;
557 case CC_X86ThisCall: POut << "__thiscall "; break;
558 case CC_X86VectorCall: POut << "__vectorcall "; break;
559 // Only bother printing the conventions that MSVC knows about.
564 FD->printQualifiedName(POut, Policy);
568 for (unsigned i = 0, e = Decl->getNumParams(); i != e; ++i) {
570 POut << Decl->getParamDecl(i)->getType().stream(Policy);
573 if (FT->isVariadic()) {
574 if (FD->getNumParams()) POut << ", ";
580 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
581 const FunctionType *FT = MD->getType()->castAs<FunctionType>();
584 if (FT->isVolatile())
586 RefQualifierKind Ref = MD->getRefQualifier();
587 if (Ref == RQ_LValue)
589 else if (Ref == RQ_RValue)
593 typedef SmallVector<const ClassTemplateSpecializationDecl *, 8> SpecsTy;
595 const DeclContext *Ctx = FD->getDeclContext();
596 while (Ctx && isa<NamedDecl>(Ctx)) {
597 const ClassTemplateSpecializationDecl *Spec
598 = dyn_cast<ClassTemplateSpecializationDecl>(Ctx);
599 if (Spec && !Spec->isExplicitSpecialization())
600 Specs.push_back(Spec);
601 Ctx = Ctx->getParent();
604 std::string TemplateParams;
605 llvm::raw_string_ostream TOut(TemplateParams);
606 for (SpecsTy::reverse_iterator I = Specs.rbegin(), E = Specs.rend();
608 const TemplateParameterList *Params
609 = (*I)->getSpecializedTemplate()->getTemplateParameters();
610 const TemplateArgumentList &Args = (*I)->getTemplateArgs();
611 assert(Params->size() == Args.size());
612 for (unsigned i = 0, numParams = Params->size(); i != numParams; ++i) {
613 StringRef Param = Params->getParam(i)->getName();
614 if (Param.empty()) continue;
615 TOut << Param << " = ";
616 Args.get(i).print(Policy, TOut);
621 FunctionTemplateSpecializationInfo *FSI
622 = FD->getTemplateSpecializationInfo();
623 if (FSI && !FSI->isExplicitSpecialization()) {
624 const TemplateParameterList* Params
625 = FSI->getTemplate()->getTemplateParameters();
626 const TemplateArgumentList* Args = FSI->TemplateArguments;
627 assert(Params->size() == Args->size());
628 for (unsigned i = 0, e = Params->size(); i != e; ++i) {
629 StringRef Param = Params->getParam(i)->getName();
630 if (Param.empty()) continue;
631 TOut << Param << " = ";
632 Args->get(i).print(Policy, TOut);
638 if (!TemplateParams.empty()) {
639 // remove the trailing comma and space
640 TemplateParams.resize(TemplateParams.size() - 2);
641 POut << " [" << TemplateParams << "]";
646 // Print "auto" for all deduced return types. This includes C++1y return
647 // type deduction and lambdas. For trailing return types resolve the
648 // decltype expression. Otherwise print the real type when this is
649 // not a constructor or destructor.
650 if (isa<CXXMethodDecl>(FD) &&
651 cast<CXXMethodDecl>(FD)->getParent()->isLambda())
652 Proto = "auto " + Proto;
653 else if (FT && FT->getReturnType()->getAs<DecltypeType>())
655 ->getAs<DecltypeType>()
656 ->getUnderlyingType()
657 .getAsStringInternal(Proto, Policy);
658 else if (!isa<CXXConstructorDecl>(FD) && !isa<CXXDestructorDecl>(FD))
659 AFT->getReturnType().getAsStringInternal(Proto, Policy);
664 return Name.str().str();
666 if (const CapturedDecl *CD = dyn_cast<CapturedDecl>(CurrentDecl)) {
667 for (const DeclContext *DC = CD->getParent(); DC; DC = DC->getParent())
668 // Skip to its enclosing function or method, but not its enclosing
670 if (DC->isFunctionOrMethod() && (DC->getDeclKind() != Decl::Captured)) {
671 const Decl *D = Decl::castFromDeclContext(DC);
672 return ComputeName(IT, D);
674 llvm_unreachable("CapturedDecl not inside a function or method");
676 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(CurrentDecl)) {
677 SmallString<256> Name;
678 llvm::raw_svector_ostream Out(Name);
679 Out << (MD->isInstanceMethod() ? '-' : '+');
682 // For incorrect code, there might not be an ObjCInterfaceDecl. Do
683 // a null check to avoid a crash.
684 if (const ObjCInterfaceDecl *ID = MD->getClassInterface())
687 if (const ObjCCategoryImplDecl *CID =
688 dyn_cast<ObjCCategoryImplDecl>(MD->getDeclContext()))
689 Out << '(' << *CID << ')';
692 MD->getSelector().print(Out);
696 return Name.str().str();
698 if (isa<TranslationUnitDecl>(CurrentDecl) && IT == PrettyFunction) {
699 // __PRETTY_FUNCTION__ -> "top level", the others produce an empty string.
705 void APNumericStorage::setIntValue(const ASTContext &C,
706 const llvm::APInt &Val) {
710 BitWidth = Val.getBitWidth();
711 unsigned NumWords = Val.getNumWords();
712 const uint64_t* Words = Val.getRawData();
714 pVal = new (C) uint64_t[NumWords];
715 std::copy(Words, Words + NumWords, pVal);
716 } else if (NumWords == 1)
722 IntegerLiteral::IntegerLiteral(const ASTContext &C, const llvm::APInt &V,
723 QualType type, SourceLocation l)
724 : Expr(IntegerLiteralClass, type, VK_RValue, OK_Ordinary, false, false,
727 assert(type->isIntegerType() && "Illegal type in IntegerLiteral");
728 assert(V.getBitWidth() == C.getIntWidth(type) &&
729 "Integer type is not the correct size for constant.");
734 IntegerLiteral::Create(const ASTContext &C, const llvm::APInt &V,
735 QualType type, SourceLocation l) {
736 return new (C) IntegerLiteral(C, V, type, l);
740 IntegerLiteral::Create(const ASTContext &C, EmptyShell Empty) {
741 return new (C) IntegerLiteral(Empty);
744 FloatingLiteral::FloatingLiteral(const ASTContext &C, const llvm::APFloat &V,
745 bool isexact, QualType Type, SourceLocation L)
746 : Expr(FloatingLiteralClass, Type, VK_RValue, OK_Ordinary, false, false,
747 false, false), Loc(L) {
748 setSemantics(V.getSemantics());
749 FloatingLiteralBits.IsExact = isexact;
753 FloatingLiteral::FloatingLiteral(const ASTContext &C, EmptyShell Empty)
754 : Expr(FloatingLiteralClass, Empty) {
755 setRawSemantics(IEEEhalf);
756 FloatingLiteralBits.IsExact = false;
760 FloatingLiteral::Create(const ASTContext &C, const llvm::APFloat &V,
761 bool isexact, QualType Type, SourceLocation L) {
762 return new (C) FloatingLiteral(C, V, isexact, Type, L);
766 FloatingLiteral::Create(const ASTContext &C, EmptyShell Empty) {
767 return new (C) FloatingLiteral(C, Empty);
770 const llvm::fltSemantics &FloatingLiteral::getSemantics() const {
771 switch(FloatingLiteralBits.Semantics) {
773 return llvm::APFloat::IEEEhalf;
775 return llvm::APFloat::IEEEsingle;
777 return llvm::APFloat::IEEEdouble;
778 case x87DoubleExtended:
779 return llvm::APFloat::x87DoubleExtended;
781 return llvm::APFloat::IEEEquad;
782 case PPCDoubleDouble:
783 return llvm::APFloat::PPCDoubleDouble;
785 llvm_unreachable("Unrecognised floating semantics");
788 void FloatingLiteral::setSemantics(const llvm::fltSemantics &Sem) {
789 if (&Sem == &llvm::APFloat::IEEEhalf)
790 FloatingLiteralBits.Semantics = IEEEhalf;
791 else if (&Sem == &llvm::APFloat::IEEEsingle)
792 FloatingLiteralBits.Semantics = IEEEsingle;
793 else if (&Sem == &llvm::APFloat::IEEEdouble)
794 FloatingLiteralBits.Semantics = IEEEdouble;
795 else if (&Sem == &llvm::APFloat::x87DoubleExtended)
796 FloatingLiteralBits.Semantics = x87DoubleExtended;
797 else if (&Sem == &llvm::APFloat::IEEEquad)
798 FloatingLiteralBits.Semantics = IEEEquad;
799 else if (&Sem == &llvm::APFloat::PPCDoubleDouble)
800 FloatingLiteralBits.Semantics = PPCDoubleDouble;
802 llvm_unreachable("Unknown floating semantics");
805 /// getValueAsApproximateDouble - This returns the value as an inaccurate
806 /// double. Note that this may cause loss of precision, but is useful for
807 /// debugging dumps, etc.
808 double FloatingLiteral::getValueAsApproximateDouble() const {
809 llvm::APFloat V = getValue();
811 V.convert(llvm::APFloat::IEEEdouble, llvm::APFloat::rmNearestTiesToEven,
813 return V.convertToDouble();
816 int StringLiteral::mapCharByteWidth(TargetInfo const &target,StringKind k) {
817 int CharByteWidth = 0;
821 CharByteWidth = target.getCharWidth();
824 CharByteWidth = target.getWCharWidth();
827 CharByteWidth = target.getChar16Width();
830 CharByteWidth = target.getChar32Width();
833 assert((CharByteWidth & 7) == 0 && "Assumes character size is byte multiple");
835 assert((CharByteWidth==1 || CharByteWidth==2 || CharByteWidth==4)
836 && "character byte widths supported are 1, 2, and 4 only");
837 return CharByteWidth;
840 StringLiteral *StringLiteral::Create(const ASTContext &C, StringRef Str,
841 StringKind Kind, bool Pascal, QualType Ty,
842 const SourceLocation *Loc,
844 assert(C.getAsConstantArrayType(Ty) &&
845 "StringLiteral must be of constant array type!");
847 // Allocate enough space for the StringLiteral plus an array of locations for
848 // any concatenated string tokens.
849 void *Mem = C.Allocate(sizeof(StringLiteral)+
850 sizeof(SourceLocation)*(NumStrs-1),
851 llvm::alignOf<StringLiteral>());
852 StringLiteral *SL = new (Mem) StringLiteral(Ty);
854 // OPTIMIZE: could allocate this appended to the StringLiteral.
855 SL->setString(C,Str,Kind,Pascal);
857 SL->TokLocs[0] = Loc[0];
858 SL->NumConcatenated = NumStrs;
861 memcpy(&SL->TokLocs[1], Loc+1, sizeof(SourceLocation)*(NumStrs-1));
865 StringLiteral *StringLiteral::CreateEmpty(const ASTContext &C,
867 void *Mem = C.Allocate(sizeof(StringLiteral)+
868 sizeof(SourceLocation)*(NumStrs-1),
869 llvm::alignOf<StringLiteral>());
870 StringLiteral *SL = new (Mem) StringLiteral(QualType());
871 SL->CharByteWidth = 0;
873 SL->NumConcatenated = NumStrs;
877 void StringLiteral::outputString(raw_ostream &OS) const {
879 case Ascii: break; // no prefix.
880 case Wide: OS << 'L'; break;
881 case UTF8: OS << "u8"; break;
882 case UTF16: OS << 'u'; break;
883 case UTF32: OS << 'U'; break;
886 static const char Hex[] = "0123456789ABCDEF";
888 unsigned LastSlashX = getLength();
889 for (unsigned I = 0, N = getLength(); I != N; ++I) {
890 switch (uint32_t Char = getCodeUnit(I)) {
892 // FIXME: Convert UTF-8 back to codepoints before rendering.
894 // Convert UTF-16 surrogate pairs back to codepoints before rendering.
895 // Leave invalid surrogates alone; we'll use \x for those.
896 if (getKind() == UTF16 && I != N - 1 && Char >= 0xd800 &&
898 uint32_t Trail = getCodeUnit(I + 1);
899 if (Trail >= 0xdc00 && Trail <= 0xdfff) {
900 Char = 0x10000 + ((Char - 0xd800) << 10) + (Trail - 0xdc00);
906 // If this is a wide string, output characters over 0xff using \x
907 // escapes. Otherwise, this is a UTF-16 or UTF-32 string, and Char is a
908 // codepoint: use \x escapes for invalid codepoints.
909 if (getKind() == Wide ||
910 (Char >= 0xd800 && Char <= 0xdfff) || Char >= 0x110000) {
911 // FIXME: Is this the best way to print wchar_t?
914 while ((Char >> Shift) == 0)
916 for (/**/; Shift >= 0; Shift -= 4)
917 OS << Hex[(Char >> Shift) & 15];
924 << Hex[(Char >> 20) & 15]
925 << Hex[(Char >> 16) & 15];
928 OS << Hex[(Char >> 12) & 15]
929 << Hex[(Char >> 8) & 15]
930 << Hex[(Char >> 4) & 15]
931 << Hex[(Char >> 0) & 15];
935 // If we used \x... for the previous character, and this character is a
936 // hexadecimal digit, prevent it being slurped as part of the \x.
937 if (LastSlashX + 1 == I) {
939 case '0': case '1': case '2': case '3': case '4':
940 case '5': case '6': case '7': case '8': case '9':
941 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
942 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
947 assert(Char <= 0xff &&
948 "Characters above 0xff should already have been handled.");
950 if (isPrintable(Char))
952 else // Output anything hard as an octal escape.
954 << (char)('0' + ((Char >> 6) & 7))
955 << (char)('0' + ((Char >> 3) & 7))
956 << (char)('0' + ((Char >> 0) & 7));
958 // Handle some common non-printable cases to make dumps prettier.
959 case '\\': OS << "\\\\"; break;
960 case '"': OS << "\\\""; break;
961 case '\n': OS << "\\n"; break;
962 case '\t': OS << "\\t"; break;
963 case '\a': OS << "\\a"; break;
964 case '\b': OS << "\\b"; break;
970 void StringLiteral::setString(const ASTContext &C, StringRef Str,
971 StringKind Kind, bool IsPascal) {
972 //FIXME: we assume that the string data comes from a target that uses the same
973 // code unit size and endianess for the type of string.
975 this->IsPascal = IsPascal;
977 CharByteWidth = mapCharByteWidth(C.getTargetInfo(),Kind);
978 assert((Str.size()%CharByteWidth == 0)
979 && "size of data must be multiple of CharByteWidth");
980 Length = Str.size()/CharByteWidth;
982 switch(CharByteWidth) {
984 char *AStrData = new (C) char[Length];
985 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
986 StrData.asChar = AStrData;
990 uint16_t *AStrData = new (C) uint16_t[Length];
991 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
992 StrData.asUInt16 = AStrData;
996 uint32_t *AStrData = new (C) uint32_t[Length];
997 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
998 StrData.asUInt32 = AStrData;
1002 assert(false && "unsupported CharByteWidth");
1006 /// getLocationOfByte - Return a source location that points to the specified
1007 /// byte of this string literal.
1009 /// Strings are amazingly complex. They can be formed from multiple tokens and
1010 /// can have escape sequences in them in addition to the usual trigraph and
1011 /// escaped newline business. This routine handles this complexity.
1013 SourceLocation StringLiteral::
1014 getLocationOfByte(unsigned ByteNo, const SourceManager &SM,
1015 const LangOptions &Features, const TargetInfo &Target) const {
1016 assert((Kind == StringLiteral::Ascii || Kind == StringLiteral::UTF8) &&
1017 "Only narrow string literals are currently supported");
1019 // Loop over all of the tokens in this string until we find the one that
1020 // contains the byte we're looking for.
1023 assert(TokNo < getNumConcatenated() && "Invalid byte number!");
1024 SourceLocation StrTokLoc = getStrTokenLoc(TokNo);
1026 // Get the spelling of the string so that we can get the data that makes up
1027 // the string literal, not the identifier for the macro it is potentially
1028 // expanded through.
1029 SourceLocation StrTokSpellingLoc = SM.getSpellingLoc(StrTokLoc);
1031 // Re-lex the token to get its length and original spelling.
1032 std::pair<FileID, unsigned> LocInfo =SM.getDecomposedLoc(StrTokSpellingLoc);
1033 bool Invalid = false;
1034 StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid);
1036 return StrTokSpellingLoc;
1038 const char *StrData = Buffer.data()+LocInfo.second;
1040 // Create a lexer starting at the beginning of this token.
1041 Lexer TheLexer(SM.getLocForStartOfFile(LocInfo.first), Features,
1042 Buffer.begin(), StrData, Buffer.end());
1044 TheLexer.LexFromRawLexer(TheTok);
1046 // Use the StringLiteralParser to compute the length of the string in bytes.
1047 StringLiteralParser SLP(TheTok, SM, Features, Target);
1048 unsigned TokNumBytes = SLP.GetStringLength();
1050 // If the byte is in this token, return the location of the byte.
1051 if (ByteNo < TokNumBytes ||
1052 (ByteNo == TokNumBytes && TokNo == getNumConcatenated() - 1)) {
1053 unsigned Offset = SLP.getOffsetOfStringByte(TheTok, ByteNo);
1055 // Now that we know the offset of the token in the spelling, use the
1056 // preprocessor to get the offset in the original source.
1057 return Lexer::AdvanceToTokenCharacter(StrTokLoc, Offset, SM, Features);
1060 // Move to the next string token.
1062 ByteNo -= TokNumBytes;
1068 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1069 /// corresponds to, e.g. "sizeof" or "[pre]++".
1070 StringRef UnaryOperator::getOpcodeStr(Opcode Op) {
1072 case UO_PostInc: return "++";
1073 case UO_PostDec: return "--";
1074 case UO_PreInc: return "++";
1075 case UO_PreDec: return "--";
1076 case UO_AddrOf: return "&";
1077 case UO_Deref: return "*";
1078 case UO_Plus: return "+";
1079 case UO_Minus: return "-";
1080 case UO_Not: return "~";
1081 case UO_LNot: return "!";
1082 case UO_Real: return "__real";
1083 case UO_Imag: return "__imag";
1084 case UO_Extension: return "__extension__";
1086 llvm_unreachable("Unknown unary operator");
1090 UnaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix) {
1092 default: llvm_unreachable("No unary operator for overloaded function");
1093 case OO_PlusPlus: return Postfix ? UO_PostInc : UO_PreInc;
1094 case OO_MinusMinus: return Postfix ? UO_PostDec : UO_PreDec;
1095 case OO_Amp: return UO_AddrOf;
1096 case OO_Star: return UO_Deref;
1097 case OO_Plus: return UO_Plus;
1098 case OO_Minus: return UO_Minus;
1099 case OO_Tilde: return UO_Not;
1100 case OO_Exclaim: return UO_LNot;
1104 OverloadedOperatorKind UnaryOperator::getOverloadedOperator(Opcode Opc) {
1106 case UO_PostInc: case UO_PreInc: return OO_PlusPlus;
1107 case UO_PostDec: case UO_PreDec: return OO_MinusMinus;
1108 case UO_AddrOf: return OO_Amp;
1109 case UO_Deref: return OO_Star;
1110 case UO_Plus: return OO_Plus;
1111 case UO_Minus: return OO_Minus;
1112 case UO_Not: return OO_Tilde;
1113 case UO_LNot: return OO_Exclaim;
1114 default: return OO_None;
1119 //===----------------------------------------------------------------------===//
1120 // Postfix Operators.
1121 //===----------------------------------------------------------------------===//
1123 CallExpr::CallExpr(const ASTContext& C, StmtClass SC, Expr *fn,
1124 unsigned NumPreArgs, ArrayRef<Expr*> args, QualType t,
1125 ExprValueKind VK, SourceLocation rparenloc)
1126 : Expr(SC, t, VK, OK_Ordinary,
1127 fn->isTypeDependent(),
1128 fn->isValueDependent(),
1129 fn->isInstantiationDependent(),
1130 fn->containsUnexpandedParameterPack()),
1131 NumArgs(args.size()) {
1133 SubExprs = new (C) Stmt*[args.size()+PREARGS_START+NumPreArgs];
1135 for (unsigned i = 0; i != args.size(); ++i) {
1136 if (args[i]->isTypeDependent())
1137 ExprBits.TypeDependent = true;
1138 if (args[i]->isValueDependent())
1139 ExprBits.ValueDependent = true;
1140 if (args[i]->isInstantiationDependent())
1141 ExprBits.InstantiationDependent = true;
1142 if (args[i]->containsUnexpandedParameterPack())
1143 ExprBits.ContainsUnexpandedParameterPack = true;
1145 SubExprs[i+PREARGS_START+NumPreArgs] = args[i];
1148 CallExprBits.NumPreArgs = NumPreArgs;
1149 RParenLoc = rparenloc;
1152 CallExpr::CallExpr(const ASTContext &C, Expr *fn, ArrayRef<Expr *> args,
1153 QualType t, ExprValueKind VK, SourceLocation rparenloc)
1154 : CallExpr(C, CallExprClass, fn, /*NumPreArgs=*/0, args, t, VK, rparenloc) {
1157 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, EmptyShell Empty)
1158 : CallExpr(C, SC, /*NumPreArgs=*/0, Empty) {}
1160 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, unsigned NumPreArgs,
1162 : Expr(SC, Empty), SubExprs(nullptr), NumArgs(0) {
1163 // FIXME: Why do we allocate this?
1164 SubExprs = new (C) Stmt*[PREARGS_START+NumPreArgs];
1165 CallExprBits.NumPreArgs = NumPreArgs;
1168 Decl *CallExpr::getCalleeDecl() {
1169 Expr *CEE = getCallee()->IgnoreParenImpCasts();
1171 while (SubstNonTypeTemplateParmExpr *NTTP
1172 = dyn_cast<SubstNonTypeTemplateParmExpr>(CEE)) {
1173 CEE = NTTP->getReplacement()->IgnoreParenCasts();
1176 // If we're calling a dereference, look at the pointer instead.
1177 if (BinaryOperator *BO = dyn_cast<BinaryOperator>(CEE)) {
1178 if (BO->isPtrMemOp())
1179 CEE = BO->getRHS()->IgnoreParenCasts();
1180 } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(CEE)) {
1181 if (UO->getOpcode() == UO_Deref)
1182 CEE = UO->getSubExpr()->IgnoreParenCasts();
1184 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE))
1185 return DRE->getDecl();
1186 if (MemberExpr *ME = dyn_cast<MemberExpr>(CEE))
1187 return ME->getMemberDecl();
1192 FunctionDecl *CallExpr::getDirectCallee() {
1193 return dyn_cast_or_null<FunctionDecl>(getCalleeDecl());
1196 /// setNumArgs - This changes the number of arguments present in this call.
1197 /// Any orphaned expressions are deleted by this, and any new operands are set
1199 void CallExpr::setNumArgs(const ASTContext& C, unsigned NumArgs) {
1200 // No change, just return.
1201 if (NumArgs == getNumArgs()) return;
1203 // If shrinking # arguments, just delete the extras and forgot them.
1204 if (NumArgs < getNumArgs()) {
1205 this->NumArgs = NumArgs;
1209 // Otherwise, we are growing the # arguments. New an bigger argument array.
1210 unsigned NumPreArgs = getNumPreArgs();
1211 Stmt **NewSubExprs = new (C) Stmt*[NumArgs+PREARGS_START+NumPreArgs];
1213 for (unsigned i = 0; i != getNumArgs()+PREARGS_START+NumPreArgs; ++i)
1214 NewSubExprs[i] = SubExprs[i];
1215 // Null out new args.
1216 for (unsigned i = getNumArgs()+PREARGS_START+NumPreArgs;
1217 i != NumArgs+PREARGS_START+NumPreArgs; ++i)
1218 NewSubExprs[i] = nullptr;
1220 if (SubExprs) C.Deallocate(SubExprs);
1221 SubExprs = NewSubExprs;
1222 this->NumArgs = NumArgs;
1225 /// getBuiltinCallee - If this is a call to a builtin, return the builtin ID. If
1227 unsigned CallExpr::getBuiltinCallee() const {
1228 // All simple function calls (e.g. func()) are implicitly cast to pointer to
1229 // function. As a result, we try and obtain the DeclRefExpr from the
1230 // ImplicitCastExpr.
1231 const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee());
1232 if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()).
1235 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr());
1239 const FunctionDecl *FDecl = dyn_cast<FunctionDecl>(DRE->getDecl());
1243 if (!FDecl->getIdentifier())
1246 return FDecl->getBuiltinID();
1249 bool CallExpr::isUnevaluatedBuiltinCall(const ASTContext &Ctx) const {
1250 if (unsigned BI = getBuiltinCallee())
1251 return Ctx.BuiltinInfo.isUnevaluated(BI);
1255 QualType CallExpr::getCallReturnType(const ASTContext &Ctx) const {
1256 const Expr *Callee = getCallee();
1257 QualType CalleeType = Callee->getType();
1258 if (const auto *FnTypePtr = CalleeType->getAs<PointerType>()) {
1259 CalleeType = FnTypePtr->getPointeeType();
1260 } else if (const auto *BPT = CalleeType->getAs<BlockPointerType>()) {
1261 CalleeType = BPT->getPointeeType();
1262 } else if (CalleeType->isSpecificPlaceholderType(BuiltinType::BoundMember)) {
1263 if (isa<CXXPseudoDestructorExpr>(Callee->IgnoreParens()))
1266 // This should never be overloaded and so should never return null.
1267 CalleeType = Expr::findBoundMemberType(Callee);
1270 const FunctionType *FnType = CalleeType->castAs<FunctionType>();
1271 return FnType->getReturnType();
1274 SourceLocation CallExpr::getLocStart() const {
1275 if (isa<CXXOperatorCallExpr>(this))
1276 return cast<CXXOperatorCallExpr>(this)->getLocStart();
1278 SourceLocation begin = getCallee()->getLocStart();
1279 if (begin.isInvalid() && getNumArgs() > 0 && getArg(0))
1280 begin = getArg(0)->getLocStart();
1283 SourceLocation CallExpr::getLocEnd() const {
1284 if (isa<CXXOperatorCallExpr>(this))
1285 return cast<CXXOperatorCallExpr>(this)->getLocEnd();
1287 SourceLocation end = getRParenLoc();
1288 if (end.isInvalid() && getNumArgs() > 0 && getArg(getNumArgs() - 1))
1289 end = getArg(getNumArgs() - 1)->getLocEnd();
1293 OffsetOfExpr *OffsetOfExpr::Create(const ASTContext &C, QualType type,
1294 SourceLocation OperatorLoc,
1295 TypeSourceInfo *tsi,
1296 ArrayRef<OffsetOfNode> comps,
1297 ArrayRef<Expr*> exprs,
1298 SourceLocation RParenLoc) {
1299 void *Mem = C.Allocate(sizeof(OffsetOfExpr) +
1300 sizeof(OffsetOfNode) * comps.size() +
1301 sizeof(Expr*) * exprs.size());
1303 return new (Mem) OffsetOfExpr(C, type, OperatorLoc, tsi, comps, exprs,
1307 OffsetOfExpr *OffsetOfExpr::CreateEmpty(const ASTContext &C,
1308 unsigned numComps, unsigned numExprs) {
1309 void *Mem = C.Allocate(sizeof(OffsetOfExpr) +
1310 sizeof(OffsetOfNode) * numComps +
1311 sizeof(Expr*) * numExprs);
1312 return new (Mem) OffsetOfExpr(numComps, numExprs);
1315 OffsetOfExpr::OffsetOfExpr(const ASTContext &C, QualType type,
1316 SourceLocation OperatorLoc, TypeSourceInfo *tsi,
1317 ArrayRef<OffsetOfNode> comps, ArrayRef<Expr*> exprs,
1318 SourceLocation RParenLoc)
1319 : Expr(OffsetOfExprClass, type, VK_RValue, OK_Ordinary,
1320 /*TypeDependent=*/false,
1321 /*ValueDependent=*/tsi->getType()->isDependentType(),
1322 tsi->getType()->isInstantiationDependentType(),
1323 tsi->getType()->containsUnexpandedParameterPack()),
1324 OperatorLoc(OperatorLoc), RParenLoc(RParenLoc), TSInfo(tsi),
1325 NumComps(comps.size()), NumExprs(exprs.size())
1327 for (unsigned i = 0; i != comps.size(); ++i) {
1328 setComponent(i, comps[i]);
1331 for (unsigned i = 0; i != exprs.size(); ++i) {
1332 if (exprs[i]->isTypeDependent() || exprs[i]->isValueDependent())
1333 ExprBits.ValueDependent = true;
1334 if (exprs[i]->containsUnexpandedParameterPack())
1335 ExprBits.ContainsUnexpandedParameterPack = true;
1337 setIndexExpr(i, exprs[i]);
1341 IdentifierInfo *OffsetOfExpr::OffsetOfNode::getFieldName() const {
1342 assert(getKind() == Field || getKind() == Identifier);
1343 if (getKind() == Field)
1344 return getField()->getIdentifier();
1346 return reinterpret_cast<IdentifierInfo *> (Data & ~(uintptr_t)Mask);
1349 UnaryExprOrTypeTraitExpr::UnaryExprOrTypeTraitExpr(
1350 UnaryExprOrTypeTrait ExprKind, Expr *E, QualType resultType,
1351 SourceLocation op, SourceLocation rp)
1352 : Expr(UnaryExprOrTypeTraitExprClass, resultType, VK_RValue, OK_Ordinary,
1353 false, // Never type-dependent (C++ [temp.dep.expr]p3).
1354 // Value-dependent if the argument is type-dependent.
1355 E->isTypeDependent(), E->isInstantiationDependent(),
1356 E->containsUnexpandedParameterPack()),
1357 OpLoc(op), RParenLoc(rp) {
1358 UnaryExprOrTypeTraitExprBits.Kind = ExprKind;
1359 UnaryExprOrTypeTraitExprBits.IsType = false;
1362 // Check to see if we are in the situation where alignof(decl) should be
1363 // dependent because decl's alignment is dependent.
1364 if (ExprKind == UETT_AlignOf) {
1365 if (!isValueDependent() || !isInstantiationDependent()) {
1366 E = E->IgnoreParens();
1368 const ValueDecl *D = nullptr;
1369 if (const auto *DRE = dyn_cast<DeclRefExpr>(E))
1371 else if (const auto *ME = dyn_cast<MemberExpr>(E))
1372 D = ME->getMemberDecl();
1375 for (const auto *I : D->specific_attrs<AlignedAttr>()) {
1376 if (I->isAlignmentDependent()) {
1377 setValueDependent(true);
1378 setInstantiationDependent(true);
1387 MemberExpr *MemberExpr::Create(
1388 const ASTContext &C, Expr *base, bool isarrow, SourceLocation OperatorLoc,
1389 NestedNameSpecifierLoc QualifierLoc, SourceLocation TemplateKWLoc,
1390 ValueDecl *memberdecl, DeclAccessPair founddecl,
1391 DeclarationNameInfo nameinfo, const TemplateArgumentListInfo *targs,
1392 QualType ty, ExprValueKind vk, ExprObjectKind ok) {
1393 std::size_t Size = sizeof(MemberExpr);
1395 bool hasQualOrFound = (QualifierLoc ||
1396 founddecl.getDecl() != memberdecl ||
1397 founddecl.getAccess() != memberdecl->getAccess());
1399 Size += sizeof(MemberNameQualifier);
1402 Size += ASTTemplateKWAndArgsInfo::sizeFor(targs->size());
1403 else if (TemplateKWLoc.isValid())
1404 Size += ASTTemplateKWAndArgsInfo::sizeFor(0);
1406 void *Mem = C.Allocate(Size, llvm::alignOf<MemberExpr>());
1407 MemberExpr *E = new (Mem)
1408 MemberExpr(base, isarrow, OperatorLoc, memberdecl, nameinfo, ty, vk, ok);
1410 if (hasQualOrFound) {
1411 // FIXME: Wrong. We should be looking at the member declaration we found.
1412 if (QualifierLoc && QualifierLoc.getNestedNameSpecifier()->isDependent()) {
1413 E->setValueDependent(true);
1414 E->setTypeDependent(true);
1415 E->setInstantiationDependent(true);
1417 else if (QualifierLoc &&
1418 QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent())
1419 E->setInstantiationDependent(true);
1421 E->HasQualifierOrFoundDecl = true;
1423 MemberNameQualifier *NQ = E->getMemberQualifier();
1424 NQ->QualifierLoc = QualifierLoc;
1425 NQ->FoundDecl = founddecl;
1428 E->HasTemplateKWAndArgsInfo = (targs || TemplateKWLoc.isValid());
1431 bool Dependent = false;
1432 bool InstantiationDependent = false;
1433 bool ContainsUnexpandedParameterPack = false;
1434 E->getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc, *targs,
1436 InstantiationDependent,
1437 ContainsUnexpandedParameterPack);
1438 if (InstantiationDependent)
1439 E->setInstantiationDependent(true);
1440 } else if (TemplateKWLoc.isValid()) {
1441 E->getTemplateKWAndArgsInfo()->initializeFrom(TemplateKWLoc);
1447 SourceLocation MemberExpr::getLocStart() const {
1448 if (isImplicitAccess()) {
1450 return getQualifierLoc().getBeginLoc();
1454 // FIXME: We don't want this to happen. Rather, we should be able to
1455 // detect all kinds of implicit accesses more cleanly.
1456 SourceLocation BaseStartLoc = getBase()->getLocStart();
1457 if (BaseStartLoc.isValid())
1458 return BaseStartLoc;
1461 SourceLocation MemberExpr::getLocEnd() const {
1462 SourceLocation EndLoc = getMemberNameInfo().getEndLoc();
1463 if (hasExplicitTemplateArgs())
1464 EndLoc = getRAngleLoc();
1465 else if (EndLoc.isInvalid())
1466 EndLoc = getBase()->getLocEnd();
1470 bool CastExpr::CastConsistency() const {
1471 switch (getCastKind()) {
1472 case CK_DerivedToBase:
1473 case CK_UncheckedDerivedToBase:
1474 case CK_DerivedToBaseMemberPointer:
1475 case CK_BaseToDerived:
1476 case CK_BaseToDerivedMemberPointer:
1477 assert(!path_empty() && "Cast kind should have a base path!");
1480 case CK_CPointerToObjCPointerCast:
1481 assert(getType()->isObjCObjectPointerType());
1482 assert(getSubExpr()->getType()->isPointerType());
1483 goto CheckNoBasePath;
1485 case CK_BlockPointerToObjCPointerCast:
1486 assert(getType()->isObjCObjectPointerType());
1487 assert(getSubExpr()->getType()->isBlockPointerType());
1488 goto CheckNoBasePath;
1490 case CK_ReinterpretMemberPointer:
1491 assert(getType()->isMemberPointerType());
1492 assert(getSubExpr()->getType()->isMemberPointerType());
1493 goto CheckNoBasePath;
1496 // Arbitrary casts to C pointer types count as bitcasts.
1497 // Otherwise, we should only have block and ObjC pointer casts
1498 // here if they stay within the type kind.
1499 if (!getType()->isPointerType()) {
1500 assert(getType()->isObjCObjectPointerType() ==
1501 getSubExpr()->getType()->isObjCObjectPointerType());
1502 assert(getType()->isBlockPointerType() ==
1503 getSubExpr()->getType()->isBlockPointerType());
1505 goto CheckNoBasePath;
1507 case CK_AnyPointerToBlockPointerCast:
1508 assert(getType()->isBlockPointerType());
1509 assert(getSubExpr()->getType()->isAnyPointerType() &&
1510 !getSubExpr()->getType()->isBlockPointerType());
1511 goto CheckNoBasePath;
1513 case CK_CopyAndAutoreleaseBlockObject:
1514 assert(getType()->isBlockPointerType());
1515 assert(getSubExpr()->getType()->isBlockPointerType());
1516 goto CheckNoBasePath;
1518 case CK_FunctionToPointerDecay:
1519 assert(getType()->isPointerType());
1520 assert(getSubExpr()->getType()->isFunctionType());
1521 goto CheckNoBasePath;
1523 case CK_AddressSpaceConversion:
1524 assert(getType()->isPointerType());
1525 assert(getSubExpr()->getType()->isPointerType());
1526 assert(getType()->getPointeeType().getAddressSpace() !=
1527 getSubExpr()->getType()->getPointeeType().getAddressSpace());
1528 // These should not have an inheritance path.
1531 case CK_ArrayToPointerDecay:
1532 case CK_NullToMemberPointer:
1533 case CK_NullToPointer:
1534 case CK_ConstructorConversion:
1535 case CK_IntegralToPointer:
1536 case CK_PointerToIntegral:
1538 case CK_VectorSplat:
1539 case CK_IntegralCast:
1540 case CK_IntegralToFloating:
1541 case CK_FloatingToIntegral:
1542 case CK_FloatingCast:
1543 case CK_ObjCObjectLValueCast:
1544 case CK_FloatingRealToComplex:
1545 case CK_FloatingComplexToReal:
1546 case CK_FloatingComplexCast:
1547 case CK_FloatingComplexToIntegralComplex:
1548 case CK_IntegralRealToComplex:
1549 case CK_IntegralComplexToReal:
1550 case CK_IntegralComplexCast:
1551 case CK_IntegralComplexToFloatingComplex:
1552 case CK_ARCProduceObject:
1553 case CK_ARCConsumeObject:
1554 case CK_ARCReclaimReturnedObject:
1555 case CK_ARCExtendBlockObject:
1556 case CK_ZeroToOCLEvent:
1557 assert(!getType()->isBooleanType() && "unheralded conversion to bool");
1558 goto CheckNoBasePath;
1561 case CK_LValueToRValue:
1563 case CK_AtomicToNonAtomic:
1564 case CK_NonAtomicToAtomic:
1565 case CK_PointerToBoolean:
1566 case CK_IntegralToBoolean:
1567 case CK_FloatingToBoolean:
1568 case CK_MemberPointerToBoolean:
1569 case CK_FloatingComplexToBoolean:
1570 case CK_IntegralComplexToBoolean:
1571 case CK_LValueBitCast: // -> bool&
1572 case CK_UserDefinedConversion: // operator bool()
1573 case CK_BuiltinFnToFnPtr:
1575 assert(path_empty() && "Cast kind should not have a base path!");
1581 const char *CastExpr::getCastKindName() const {
1582 switch (getCastKind()) {
1587 case CK_LValueBitCast:
1588 return "LValueBitCast";
1589 case CK_LValueToRValue:
1590 return "LValueToRValue";
1593 case CK_BaseToDerived:
1594 return "BaseToDerived";
1595 case CK_DerivedToBase:
1596 return "DerivedToBase";
1597 case CK_UncheckedDerivedToBase:
1598 return "UncheckedDerivedToBase";
1603 case CK_ArrayToPointerDecay:
1604 return "ArrayToPointerDecay";
1605 case CK_FunctionToPointerDecay:
1606 return "FunctionToPointerDecay";
1607 case CK_NullToMemberPointer:
1608 return "NullToMemberPointer";
1609 case CK_NullToPointer:
1610 return "NullToPointer";
1611 case CK_BaseToDerivedMemberPointer:
1612 return "BaseToDerivedMemberPointer";
1613 case CK_DerivedToBaseMemberPointer:
1614 return "DerivedToBaseMemberPointer";
1615 case CK_ReinterpretMemberPointer:
1616 return "ReinterpretMemberPointer";
1617 case CK_UserDefinedConversion:
1618 return "UserDefinedConversion";
1619 case CK_ConstructorConversion:
1620 return "ConstructorConversion";
1621 case CK_IntegralToPointer:
1622 return "IntegralToPointer";
1623 case CK_PointerToIntegral:
1624 return "PointerToIntegral";
1625 case CK_PointerToBoolean:
1626 return "PointerToBoolean";
1629 case CK_VectorSplat:
1630 return "VectorSplat";
1631 case CK_IntegralCast:
1632 return "IntegralCast";
1633 case CK_IntegralToBoolean:
1634 return "IntegralToBoolean";
1635 case CK_IntegralToFloating:
1636 return "IntegralToFloating";
1637 case CK_FloatingToIntegral:
1638 return "FloatingToIntegral";
1639 case CK_FloatingCast:
1640 return "FloatingCast";
1641 case CK_FloatingToBoolean:
1642 return "FloatingToBoolean";
1643 case CK_MemberPointerToBoolean:
1644 return "MemberPointerToBoolean";
1645 case CK_CPointerToObjCPointerCast:
1646 return "CPointerToObjCPointerCast";
1647 case CK_BlockPointerToObjCPointerCast:
1648 return "BlockPointerToObjCPointerCast";
1649 case CK_AnyPointerToBlockPointerCast:
1650 return "AnyPointerToBlockPointerCast";
1651 case CK_ObjCObjectLValueCast:
1652 return "ObjCObjectLValueCast";
1653 case CK_FloatingRealToComplex:
1654 return "FloatingRealToComplex";
1655 case CK_FloatingComplexToReal:
1656 return "FloatingComplexToReal";
1657 case CK_FloatingComplexToBoolean:
1658 return "FloatingComplexToBoolean";
1659 case CK_FloatingComplexCast:
1660 return "FloatingComplexCast";
1661 case CK_FloatingComplexToIntegralComplex:
1662 return "FloatingComplexToIntegralComplex";
1663 case CK_IntegralRealToComplex:
1664 return "IntegralRealToComplex";
1665 case CK_IntegralComplexToReal:
1666 return "IntegralComplexToReal";
1667 case CK_IntegralComplexToBoolean:
1668 return "IntegralComplexToBoolean";
1669 case CK_IntegralComplexCast:
1670 return "IntegralComplexCast";
1671 case CK_IntegralComplexToFloatingComplex:
1672 return "IntegralComplexToFloatingComplex";
1673 case CK_ARCConsumeObject:
1674 return "ARCConsumeObject";
1675 case CK_ARCProduceObject:
1676 return "ARCProduceObject";
1677 case CK_ARCReclaimReturnedObject:
1678 return "ARCReclaimReturnedObject";
1679 case CK_ARCExtendBlockObject:
1680 return "ARCExtendBlockObject";
1681 case CK_AtomicToNonAtomic:
1682 return "AtomicToNonAtomic";
1683 case CK_NonAtomicToAtomic:
1684 return "NonAtomicToAtomic";
1685 case CK_CopyAndAutoreleaseBlockObject:
1686 return "CopyAndAutoreleaseBlockObject";
1687 case CK_BuiltinFnToFnPtr:
1688 return "BuiltinFnToFnPtr";
1689 case CK_ZeroToOCLEvent:
1690 return "ZeroToOCLEvent";
1691 case CK_AddressSpaceConversion:
1692 return "AddressSpaceConversion";
1695 llvm_unreachable("Unhandled cast kind!");
1698 Expr *CastExpr::getSubExprAsWritten() {
1699 Expr *SubExpr = nullptr;
1702 SubExpr = E->getSubExpr();
1704 // Skip through reference binding to temporary.
1705 if (MaterializeTemporaryExpr *Materialize
1706 = dyn_cast<MaterializeTemporaryExpr>(SubExpr))
1707 SubExpr = Materialize->GetTemporaryExpr();
1709 // Skip any temporary bindings; they're implicit.
1710 if (CXXBindTemporaryExpr *Binder = dyn_cast<CXXBindTemporaryExpr>(SubExpr))
1711 SubExpr = Binder->getSubExpr();
1713 // Conversions by constructor and conversion functions have a
1714 // subexpression describing the call; strip it off.
1715 if (E->getCastKind() == CK_ConstructorConversion)
1716 SubExpr = cast<CXXConstructExpr>(SubExpr)->getArg(0);
1717 else if (E->getCastKind() == CK_UserDefinedConversion)
1718 SubExpr = cast<CXXMemberCallExpr>(SubExpr)->getImplicitObjectArgument();
1720 // If the subexpression we're left with is an implicit cast, look
1721 // through that, too.
1722 } while ((E = dyn_cast<ImplicitCastExpr>(SubExpr)));
1727 CXXBaseSpecifier **CastExpr::path_buffer() {
1728 switch (getStmtClass()) {
1729 #define ABSTRACT_STMT(x)
1730 #define CASTEXPR(Type, Base) \
1731 case Stmt::Type##Class: \
1732 return reinterpret_cast<CXXBaseSpecifier**>(static_cast<Type*>(this)+1);
1733 #define STMT(Type, Base)
1734 #include "clang/AST/StmtNodes.inc"
1736 llvm_unreachable("non-cast expressions not possible here");
1740 void CastExpr::setCastPath(const CXXCastPath &Path) {
1741 assert(Path.size() == path_size());
1742 memcpy(path_buffer(), Path.data(), Path.size() * sizeof(CXXBaseSpecifier*));
1745 ImplicitCastExpr *ImplicitCastExpr::Create(const ASTContext &C, QualType T,
1746 CastKind Kind, Expr *Operand,
1747 const CXXCastPath *BasePath,
1749 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1751 C.Allocate(sizeof(ImplicitCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1752 ImplicitCastExpr *E =
1753 new (Buffer) ImplicitCastExpr(T, Kind, Operand, PathSize, VK);
1754 if (PathSize) E->setCastPath(*BasePath);
1758 ImplicitCastExpr *ImplicitCastExpr::CreateEmpty(const ASTContext &C,
1759 unsigned PathSize) {
1761 C.Allocate(sizeof(ImplicitCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1762 return new (Buffer) ImplicitCastExpr(EmptyShell(), PathSize);
1766 CStyleCastExpr *CStyleCastExpr::Create(const ASTContext &C, QualType T,
1767 ExprValueKind VK, CastKind K, Expr *Op,
1768 const CXXCastPath *BasePath,
1769 TypeSourceInfo *WrittenTy,
1770 SourceLocation L, SourceLocation R) {
1771 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1773 C.Allocate(sizeof(CStyleCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1775 new (Buffer) CStyleCastExpr(T, VK, K, Op, PathSize, WrittenTy, L, R);
1776 if (PathSize) E->setCastPath(*BasePath);
1780 CStyleCastExpr *CStyleCastExpr::CreateEmpty(const ASTContext &C,
1781 unsigned PathSize) {
1783 C.Allocate(sizeof(CStyleCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1784 return new (Buffer) CStyleCastExpr(EmptyShell(), PathSize);
1787 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1788 /// corresponds to, e.g. "<<=".
1789 StringRef BinaryOperator::getOpcodeStr(Opcode Op) {
1791 case BO_PtrMemD: return ".*";
1792 case BO_PtrMemI: return "->*";
1793 case BO_Mul: return "*";
1794 case BO_Div: return "/";
1795 case BO_Rem: return "%";
1796 case BO_Add: return "+";
1797 case BO_Sub: return "-";
1798 case BO_Shl: return "<<";
1799 case BO_Shr: return ">>";
1800 case BO_LT: return "<";
1801 case BO_GT: return ">";
1802 case BO_LE: return "<=";
1803 case BO_GE: return ">=";
1804 case BO_EQ: return "==";
1805 case BO_NE: return "!=";
1806 case BO_And: return "&";
1807 case BO_Xor: return "^";
1808 case BO_Or: return "|";
1809 case BO_LAnd: return "&&";
1810 case BO_LOr: return "||";
1811 case BO_Assign: return "=";
1812 case BO_MulAssign: return "*=";
1813 case BO_DivAssign: return "/=";
1814 case BO_RemAssign: return "%=";
1815 case BO_AddAssign: return "+=";
1816 case BO_SubAssign: return "-=";
1817 case BO_ShlAssign: return "<<=";
1818 case BO_ShrAssign: return ">>=";
1819 case BO_AndAssign: return "&=";
1820 case BO_XorAssign: return "^=";
1821 case BO_OrAssign: return "|=";
1822 case BO_Comma: return ",";
1825 llvm_unreachable("Invalid OpCode!");
1829 BinaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO) {
1831 default: llvm_unreachable("Not an overloadable binary operator");
1832 case OO_Plus: return BO_Add;
1833 case OO_Minus: return BO_Sub;
1834 case OO_Star: return BO_Mul;
1835 case OO_Slash: return BO_Div;
1836 case OO_Percent: return BO_Rem;
1837 case OO_Caret: return BO_Xor;
1838 case OO_Amp: return BO_And;
1839 case OO_Pipe: return BO_Or;
1840 case OO_Equal: return BO_Assign;
1841 case OO_Less: return BO_LT;
1842 case OO_Greater: return BO_GT;
1843 case OO_PlusEqual: return BO_AddAssign;
1844 case OO_MinusEqual: return BO_SubAssign;
1845 case OO_StarEqual: return BO_MulAssign;
1846 case OO_SlashEqual: return BO_DivAssign;
1847 case OO_PercentEqual: return BO_RemAssign;
1848 case OO_CaretEqual: return BO_XorAssign;
1849 case OO_AmpEqual: return BO_AndAssign;
1850 case OO_PipeEqual: return BO_OrAssign;
1851 case OO_LessLess: return BO_Shl;
1852 case OO_GreaterGreater: return BO_Shr;
1853 case OO_LessLessEqual: return BO_ShlAssign;
1854 case OO_GreaterGreaterEqual: return BO_ShrAssign;
1855 case OO_EqualEqual: return BO_EQ;
1856 case OO_ExclaimEqual: return BO_NE;
1857 case OO_LessEqual: return BO_LE;
1858 case OO_GreaterEqual: return BO_GE;
1859 case OO_AmpAmp: return BO_LAnd;
1860 case OO_PipePipe: return BO_LOr;
1861 case OO_Comma: return BO_Comma;
1862 case OO_ArrowStar: return BO_PtrMemI;
1866 OverloadedOperatorKind BinaryOperator::getOverloadedOperator(Opcode Opc) {
1867 static const OverloadedOperatorKind OverOps[] = {
1868 /* .* Cannot be overloaded */OO_None, OO_ArrowStar,
1869 OO_Star, OO_Slash, OO_Percent,
1871 OO_LessLess, OO_GreaterGreater,
1872 OO_Less, OO_Greater, OO_LessEqual, OO_GreaterEqual,
1873 OO_EqualEqual, OO_ExclaimEqual,
1879 OO_Equal, OO_StarEqual,
1880 OO_SlashEqual, OO_PercentEqual,
1881 OO_PlusEqual, OO_MinusEqual,
1882 OO_LessLessEqual, OO_GreaterGreaterEqual,
1883 OO_AmpEqual, OO_CaretEqual,
1887 return OverOps[Opc];
1890 InitListExpr::InitListExpr(const ASTContext &C, SourceLocation lbraceloc,
1891 ArrayRef<Expr*> initExprs, SourceLocation rbraceloc)
1892 : Expr(InitListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false,
1894 InitExprs(C, initExprs.size()),
1895 LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), AltForm(nullptr, true)
1897 sawArrayRangeDesignator(false);
1898 for (unsigned I = 0; I != initExprs.size(); ++I) {
1899 if (initExprs[I]->isTypeDependent())
1900 ExprBits.TypeDependent = true;
1901 if (initExprs[I]->isValueDependent())
1902 ExprBits.ValueDependent = true;
1903 if (initExprs[I]->isInstantiationDependent())
1904 ExprBits.InstantiationDependent = true;
1905 if (initExprs[I]->containsUnexpandedParameterPack())
1906 ExprBits.ContainsUnexpandedParameterPack = true;
1909 InitExprs.insert(C, InitExprs.end(), initExprs.begin(), initExprs.end());
1912 void InitListExpr::reserveInits(const ASTContext &C, unsigned NumInits) {
1913 if (NumInits > InitExprs.size())
1914 InitExprs.reserve(C, NumInits);
1917 void InitListExpr::resizeInits(const ASTContext &C, unsigned NumInits) {
1918 InitExprs.resize(C, NumInits, nullptr);
1921 Expr *InitListExpr::updateInit(const ASTContext &C, unsigned Init, Expr *expr) {
1922 if (Init >= InitExprs.size()) {
1923 InitExprs.insert(C, InitExprs.end(), Init - InitExprs.size() + 1, nullptr);
1924 setInit(Init, expr);
1928 Expr *Result = cast_or_null<Expr>(InitExprs[Init]);
1929 setInit(Init, expr);
1933 void InitListExpr::setArrayFiller(Expr *filler) {
1934 assert(!hasArrayFiller() && "Filler already set!");
1935 ArrayFillerOrUnionFieldInit = filler;
1936 // Fill out any "holes" in the array due to designated initializers.
1937 Expr **inits = getInits();
1938 for (unsigned i = 0, e = getNumInits(); i != e; ++i)
1939 if (inits[i] == nullptr)
1943 bool InitListExpr::isStringLiteralInit() const {
1944 if (getNumInits() != 1)
1946 const ArrayType *AT = getType()->getAsArrayTypeUnsafe();
1947 if (!AT || !AT->getElementType()->isIntegerType())
1949 // It is possible for getInit() to return null.
1950 const Expr *Init = getInit(0);
1953 Init = Init->IgnoreParens();
1954 return isa<StringLiteral>(Init) || isa<ObjCEncodeExpr>(Init);
1957 SourceLocation InitListExpr::getLocStart() const {
1958 if (InitListExpr *SyntacticForm = getSyntacticForm())
1959 return SyntacticForm->getLocStart();
1960 SourceLocation Beg = LBraceLoc;
1961 if (Beg.isInvalid()) {
1962 // Find the first non-null initializer.
1963 for (InitExprsTy::const_iterator I = InitExprs.begin(),
1964 E = InitExprs.end();
1967 Beg = S->getLocStart();
1975 SourceLocation InitListExpr::getLocEnd() const {
1976 if (InitListExpr *SyntacticForm = getSyntacticForm())
1977 return SyntacticForm->getLocEnd();
1978 SourceLocation End = RBraceLoc;
1979 if (End.isInvalid()) {
1980 // Find the first non-null initializer from the end.
1981 for (InitExprsTy::const_reverse_iterator I = InitExprs.rbegin(),
1982 E = InitExprs.rend();
1985 End = S->getLocEnd();
1993 /// getFunctionType - Return the underlying function type for this block.
1995 const FunctionProtoType *BlockExpr::getFunctionType() const {
1996 // The block pointer is never sugared, but the function type might be.
1997 return cast<BlockPointerType>(getType())
1998 ->getPointeeType()->castAs<FunctionProtoType>();
2001 SourceLocation BlockExpr::getCaretLocation() const {
2002 return TheBlock->getCaretLocation();
2004 const Stmt *BlockExpr::getBody() const {
2005 return TheBlock->getBody();
2007 Stmt *BlockExpr::getBody() {
2008 return TheBlock->getBody();
2012 //===----------------------------------------------------------------------===//
2013 // Generic Expression Routines
2014 //===----------------------------------------------------------------------===//
2016 /// isUnusedResultAWarning - Return true if this immediate expression should
2017 /// be warned about if the result is unused. If so, fill in Loc and Ranges
2018 /// with location to warn on and the source range[s] to report with the
2020 bool Expr::isUnusedResultAWarning(const Expr *&WarnE, SourceLocation &Loc,
2021 SourceRange &R1, SourceRange &R2,
2022 ASTContext &Ctx) const {
2023 // Don't warn if the expr is type dependent. The type could end up
2024 // instantiating to void.
2025 if (isTypeDependent())
2028 switch (getStmtClass()) {
2030 if (getType()->isVoidType())
2034 R1 = getSourceRange();
2036 case ParenExprClass:
2037 return cast<ParenExpr>(this)->getSubExpr()->
2038 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2039 case GenericSelectionExprClass:
2040 return cast<GenericSelectionExpr>(this)->getResultExpr()->
2041 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2042 case ChooseExprClass:
2043 return cast<ChooseExpr>(this)->getChosenSubExpr()->
2044 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2045 case UnaryOperatorClass: {
2046 const UnaryOperator *UO = cast<UnaryOperator>(this);
2048 switch (UO->getOpcode()) {
2059 case UO_PreDec: // ++/--
2060 return false; // Not a warning.
2063 // accessing a piece of a volatile complex is a side-effect.
2064 if (Ctx.getCanonicalType(UO->getSubExpr()->getType())
2065 .isVolatileQualified())
2069 return UO->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2072 Loc = UO->getOperatorLoc();
2073 R1 = UO->getSubExpr()->getSourceRange();
2076 case BinaryOperatorClass: {
2077 const BinaryOperator *BO = cast<BinaryOperator>(this);
2078 switch (BO->getOpcode()) {
2081 // Consider the RHS of comma for side effects. LHS was checked by
2082 // Sema::CheckCommaOperands.
2084 // ((foo = <blah>), 0) is an idiom for hiding the result (and
2085 // lvalue-ness) of an assignment written in a macro.
2086 if (IntegerLiteral *IE =
2087 dyn_cast<IntegerLiteral>(BO->getRHS()->IgnoreParens()))
2088 if (IE->getValue() == 0)
2090 return BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2091 // Consider '||', '&&' to have side effects if the LHS or RHS does.
2094 if (!BO->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) ||
2095 !BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2099 if (BO->isAssignmentOp())
2102 Loc = BO->getOperatorLoc();
2103 R1 = BO->getLHS()->getSourceRange();
2104 R2 = BO->getRHS()->getSourceRange();
2107 case CompoundAssignOperatorClass:
2108 case VAArgExprClass:
2109 case AtomicExprClass:
2112 case ConditionalOperatorClass: {
2113 // If only one of the LHS or RHS is a warning, the operator might
2114 // be being used for control flow. Only warn if both the LHS and
2115 // RHS are warnings.
2116 const ConditionalOperator *Exp = cast<ConditionalOperator>(this);
2117 if (!Exp->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2121 return Exp->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2124 case MemberExprClass:
2126 Loc = cast<MemberExpr>(this)->getMemberLoc();
2127 R1 = SourceRange(Loc, Loc);
2128 R2 = cast<MemberExpr>(this)->getBase()->getSourceRange();
2131 case ArraySubscriptExprClass:
2133 Loc = cast<ArraySubscriptExpr>(this)->getRBracketLoc();
2134 R1 = cast<ArraySubscriptExpr>(this)->getLHS()->getSourceRange();
2135 R2 = cast<ArraySubscriptExpr>(this)->getRHS()->getSourceRange();
2138 case CXXOperatorCallExprClass: {
2139 // Warn about operator ==,!=,<,>,<=, and >= even when user-defined operator
2140 // overloads as there is no reasonable way to define these such that they
2141 // have non-trivial, desirable side-effects. See the -Wunused-comparison
2142 // warning: operators == and != are commonly typo'ed, and so warning on them
2143 // provides additional value as well. If this list is updated,
2144 // DiagnoseUnusedComparison should be as well.
2145 const CXXOperatorCallExpr *Op = cast<CXXOperatorCallExpr>(this);
2146 switch (Op->getOperator()) {
2150 case OO_ExclaimEqual:
2153 case OO_GreaterEqual:
2155 if (Op->getCallReturnType(Ctx)->isReferenceType() ||
2156 Op->getCallReturnType(Ctx)->isVoidType())
2159 Loc = Op->getOperatorLoc();
2160 R1 = Op->getSourceRange();
2164 // Fallthrough for generic call handling.
2167 case CXXMemberCallExprClass:
2168 case UserDefinedLiteralClass: {
2169 // If this is a direct call, get the callee.
2170 const CallExpr *CE = cast<CallExpr>(this);
2171 if (const Decl *FD = CE->getCalleeDecl()) {
2172 const FunctionDecl *Func = dyn_cast<FunctionDecl>(FD);
2173 bool HasWarnUnusedResultAttr = Func ? Func->hasUnusedResultAttr()
2174 : FD->hasAttr<WarnUnusedResultAttr>();
2176 // If the callee has attribute pure, const, or warn_unused_result, warn
2177 // about it. void foo() { strlen("bar"); } should warn.
2179 // Note: If new cases are added here, DiagnoseUnusedExprResult should be
2180 // updated to match for QoI.
2181 if (HasWarnUnusedResultAttr ||
2182 FD->hasAttr<PureAttr>() || FD->hasAttr<ConstAttr>()) {
2184 Loc = CE->getCallee()->getLocStart();
2185 R1 = CE->getCallee()->getSourceRange();
2187 if (unsigned NumArgs = CE->getNumArgs())
2188 R2 = SourceRange(CE->getArg(0)->getLocStart(),
2189 CE->getArg(NumArgs-1)->getLocEnd());
2196 // If we don't know precisely what we're looking at, let's not warn.
2197 case UnresolvedLookupExprClass:
2198 case CXXUnresolvedConstructExprClass:
2201 case CXXTemporaryObjectExprClass:
2202 case CXXConstructExprClass: {
2203 if (const CXXRecordDecl *Type = getType()->getAsCXXRecordDecl()) {
2204 if (Type->hasAttr<WarnUnusedAttr>()) {
2206 Loc = getLocStart();
2207 R1 = getSourceRange();
2214 case ObjCMessageExprClass: {
2215 const ObjCMessageExpr *ME = cast<ObjCMessageExpr>(this);
2216 if (Ctx.getLangOpts().ObjCAutoRefCount &&
2217 ME->isInstanceMessage() &&
2218 !ME->getType()->isVoidType() &&
2219 ME->getMethodFamily() == OMF_init) {
2222 R1 = ME->getSourceRange();
2226 if (const ObjCMethodDecl *MD = ME->getMethodDecl())
2227 if (MD->hasAttr<WarnUnusedResultAttr>()) {
2236 case ObjCPropertyRefExprClass:
2239 R1 = getSourceRange();
2242 case PseudoObjectExprClass: {
2243 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
2245 // Only complain about things that have the form of a getter.
2246 if (isa<UnaryOperator>(PO->getSyntacticForm()) ||
2247 isa<BinaryOperator>(PO->getSyntacticForm()))
2252 R1 = getSourceRange();
2256 case StmtExprClass: {
2257 // Statement exprs don't logically have side effects themselves, but are
2258 // sometimes used in macros in ways that give them a type that is unused.
2259 // For example ({ blah; foo(); }) will end up with a type if foo has a type.
2260 // however, if the result of the stmt expr is dead, we don't want to emit a
2262 const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt();
2263 if (!CS->body_empty()) {
2264 if (const Expr *E = dyn_cast<Expr>(CS->body_back()))
2265 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2266 if (const LabelStmt *Label = dyn_cast<LabelStmt>(CS->body_back()))
2267 if (const Expr *E = dyn_cast<Expr>(Label->getSubStmt()))
2268 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2271 if (getType()->isVoidType())
2274 Loc = cast<StmtExpr>(this)->getLParenLoc();
2275 R1 = getSourceRange();
2278 case CXXFunctionalCastExprClass:
2279 case CStyleCastExprClass: {
2280 // Ignore an explicit cast to void unless the operand is a non-trivial
2282 const CastExpr *CE = cast<CastExpr>(this);
2283 if (CE->getCastKind() == CK_ToVoid) {
2284 if (CE->getSubExpr()->isGLValue() &&
2285 CE->getSubExpr()->getType().isVolatileQualified()) {
2286 const DeclRefExpr *DRE =
2287 dyn_cast<DeclRefExpr>(CE->getSubExpr()->IgnoreParens());
2288 if (!(DRE && isa<VarDecl>(DRE->getDecl()) &&
2289 cast<VarDecl>(DRE->getDecl())->hasLocalStorage())) {
2290 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc,
2297 // If this is a cast to a constructor conversion, check the operand.
2298 // Otherwise, the result of the cast is unused.
2299 if (CE->getCastKind() == CK_ConstructorConversion)
2300 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2303 if (const CXXFunctionalCastExpr *CXXCE =
2304 dyn_cast<CXXFunctionalCastExpr>(this)) {
2305 Loc = CXXCE->getLocStart();
2306 R1 = CXXCE->getSubExpr()->getSourceRange();
2308 const CStyleCastExpr *CStyleCE = cast<CStyleCastExpr>(this);
2309 Loc = CStyleCE->getLParenLoc();
2310 R1 = CStyleCE->getSubExpr()->getSourceRange();
2314 case ImplicitCastExprClass: {
2315 const CastExpr *ICE = cast<ImplicitCastExpr>(this);
2317 // lvalue-to-rvalue conversion on a volatile lvalue is a side-effect.
2318 if (ICE->getCastKind() == CK_LValueToRValue &&
2319 ICE->getSubExpr()->getType().isVolatileQualified())
2322 return ICE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2324 case CXXDefaultArgExprClass:
2325 return (cast<CXXDefaultArgExpr>(this)
2326 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2327 case CXXDefaultInitExprClass:
2328 return (cast<CXXDefaultInitExpr>(this)
2329 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2331 case CXXNewExprClass:
2332 // FIXME: In theory, there might be new expressions that don't have side
2333 // effects (e.g. a placement new with an uninitialized POD).
2334 case CXXDeleteExprClass:
2336 case CXXBindTemporaryExprClass:
2337 return (cast<CXXBindTemporaryExpr>(this)
2338 ->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2339 case ExprWithCleanupsClass:
2340 return (cast<ExprWithCleanups>(this)
2341 ->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2345 /// isOBJCGCCandidate - Check if an expression is objc gc'able.
2346 /// returns true, if it is; false otherwise.
2347 bool Expr::isOBJCGCCandidate(ASTContext &Ctx) const {
2348 const Expr *E = IgnoreParens();
2349 switch (E->getStmtClass()) {
2352 case ObjCIvarRefExprClass:
2354 case Expr::UnaryOperatorClass:
2355 return cast<UnaryOperator>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2356 case ImplicitCastExprClass:
2357 return cast<ImplicitCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2358 case MaterializeTemporaryExprClass:
2359 return cast<MaterializeTemporaryExpr>(E)->GetTemporaryExpr()
2360 ->isOBJCGCCandidate(Ctx);
2361 case CStyleCastExprClass:
2362 return cast<CStyleCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2363 case DeclRefExprClass: {
2364 const Decl *D = cast<DeclRefExpr>(E)->getDecl();
2366 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
2367 if (VD->hasGlobalStorage())
2369 QualType T = VD->getType();
2370 // dereferencing to a pointer is always a gc'able candidate,
2371 // unless it is __weak.
2372 return T->isPointerType() &&
2373 (Ctx.getObjCGCAttrKind(T) != Qualifiers::Weak);
2377 case MemberExprClass: {
2378 const MemberExpr *M = cast<MemberExpr>(E);
2379 return M->getBase()->isOBJCGCCandidate(Ctx);
2381 case ArraySubscriptExprClass:
2382 return cast<ArraySubscriptExpr>(E)->getBase()->isOBJCGCCandidate(Ctx);
2386 bool Expr::isBoundMemberFunction(ASTContext &Ctx) const {
2387 if (isTypeDependent())
2389 return ClassifyLValue(Ctx) == Expr::LV_MemberFunction;
2392 QualType Expr::findBoundMemberType(const Expr *expr) {
2393 assert(expr->hasPlaceholderType(BuiltinType::BoundMember));
2395 // Bound member expressions are always one of these possibilities:
2396 // x->m x.m x->*y x.*y
2397 // (possibly parenthesized)
2399 expr = expr->IgnoreParens();
2400 if (const MemberExpr *mem = dyn_cast<MemberExpr>(expr)) {
2401 assert(isa<CXXMethodDecl>(mem->getMemberDecl()));
2402 return mem->getMemberDecl()->getType();
2405 if (const BinaryOperator *op = dyn_cast<BinaryOperator>(expr)) {
2406 QualType type = op->getRHS()->getType()->castAs<MemberPointerType>()
2408 assert(type->isFunctionType());
2412 assert(isa<UnresolvedMemberExpr>(expr) || isa<CXXPseudoDestructorExpr>(expr));
2416 Expr* Expr::IgnoreParens() {
2419 if (ParenExpr* P = dyn_cast<ParenExpr>(E)) {
2420 E = P->getSubExpr();
2423 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) {
2424 if (P->getOpcode() == UO_Extension) {
2425 E = P->getSubExpr();
2429 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) {
2430 if (!P->isResultDependent()) {
2431 E = P->getResultExpr();
2435 if (ChooseExpr* P = dyn_cast<ChooseExpr>(E)) {
2436 if (!P->isConditionDependent()) {
2437 E = P->getChosenSubExpr();
2445 /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr
2446 /// or CastExprs or ImplicitCastExprs, returning their operand.
2447 Expr *Expr::IgnoreParenCasts() {
2450 E = E->IgnoreParens();
2451 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2452 E = P->getSubExpr();
2455 if (MaterializeTemporaryExpr *Materialize
2456 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2457 E = Materialize->GetTemporaryExpr();
2460 if (SubstNonTypeTemplateParmExpr *NTTP
2461 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2462 E = NTTP->getReplacement();
2469 Expr *Expr::IgnoreCasts() {
2472 if (CastExpr *P = dyn_cast<CastExpr>(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 /// IgnoreParenLValueCasts - Ignore parentheses and lvalue-to-rvalue
2491 /// casts. This is intended purely as a temporary workaround for code
2492 /// that hasn't yet been rewritten to do the right thing about those
2493 /// casts, and may disappear along with the last internal use.
2494 Expr *Expr::IgnoreParenLValueCasts() {
2497 E = E->IgnoreParens();
2498 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2499 if (P->getCastKind() == CK_LValueToRValue) {
2500 E = P->getSubExpr();
2503 } else if (MaterializeTemporaryExpr *Materialize
2504 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2505 E = Materialize->GetTemporaryExpr();
2507 } else if (SubstNonTypeTemplateParmExpr *NTTP
2508 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2509 E = NTTP->getReplacement();
2517 Expr *Expr::ignoreParenBaseCasts() {
2520 E = E->IgnoreParens();
2521 if (CastExpr *CE = dyn_cast<CastExpr>(E)) {
2522 if (CE->getCastKind() == CK_DerivedToBase ||
2523 CE->getCastKind() == CK_UncheckedDerivedToBase ||
2524 CE->getCastKind() == CK_NoOp) {
2525 E = CE->getSubExpr();
2534 Expr *Expr::IgnoreParenImpCasts() {
2537 E = E->IgnoreParens();
2538 if (ImplicitCastExpr *P = dyn_cast<ImplicitCastExpr>(E)) {
2539 E = P->getSubExpr();
2542 if (MaterializeTemporaryExpr *Materialize
2543 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2544 E = Materialize->GetTemporaryExpr();
2547 if (SubstNonTypeTemplateParmExpr *NTTP
2548 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2549 E = NTTP->getReplacement();
2556 Expr *Expr::IgnoreConversionOperator() {
2557 if (CXXMemberCallExpr *MCE = dyn_cast<CXXMemberCallExpr>(this)) {
2558 if (MCE->getMethodDecl() && isa<CXXConversionDecl>(MCE->getMethodDecl()))
2559 return MCE->getImplicitObjectArgument();
2564 /// IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the
2565 /// value (including ptr->int casts of the same size). Strip off any
2566 /// ParenExpr or CastExprs, returning their operand.
2567 Expr *Expr::IgnoreParenNoopCasts(ASTContext &Ctx) {
2570 E = E->IgnoreParens();
2572 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2573 // We ignore integer <-> casts that are of the same width, ptr<->ptr and
2574 // ptr<->int casts of the same width. We also ignore all identity casts.
2575 Expr *SE = P->getSubExpr();
2577 if (Ctx.hasSameUnqualifiedType(E->getType(), SE->getType())) {
2582 if ((E->getType()->isPointerType() ||
2583 E->getType()->isIntegralType(Ctx)) &&
2584 (SE->getType()->isPointerType() ||
2585 SE->getType()->isIntegralType(Ctx)) &&
2586 Ctx.getTypeSize(E->getType()) == Ctx.getTypeSize(SE->getType())) {
2592 if (SubstNonTypeTemplateParmExpr *NTTP
2593 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2594 E = NTTP->getReplacement();
2602 bool Expr::isDefaultArgument() const {
2603 const Expr *E = this;
2604 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2605 E = M->GetTemporaryExpr();
2607 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E))
2608 E = ICE->getSubExprAsWritten();
2610 return isa<CXXDefaultArgExpr>(E);
2613 /// \brief Skip over any no-op casts and any temporary-binding
2615 static const Expr *skipTemporaryBindingsNoOpCastsAndParens(const Expr *E) {
2616 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2617 E = M->GetTemporaryExpr();
2619 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2620 if (ICE->getCastKind() == CK_NoOp)
2621 E = ICE->getSubExpr();
2626 while (const CXXBindTemporaryExpr *BE = dyn_cast<CXXBindTemporaryExpr>(E))
2627 E = BE->getSubExpr();
2629 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2630 if (ICE->getCastKind() == CK_NoOp)
2631 E = ICE->getSubExpr();
2636 return E->IgnoreParens();
2639 /// isTemporaryObject - Determines if this expression produces a
2640 /// temporary of the given class type.
2641 bool Expr::isTemporaryObject(ASTContext &C, const CXXRecordDecl *TempTy) const {
2642 if (!C.hasSameUnqualifiedType(getType(), C.getTypeDeclType(TempTy)))
2645 const Expr *E = skipTemporaryBindingsNoOpCastsAndParens(this);
2647 // Temporaries are by definition pr-values of class type.
2648 if (!E->Classify(C).isPRValue()) {
2649 // In this context, property reference is a message call and is pr-value.
2650 if (!isa<ObjCPropertyRefExpr>(E))
2654 // Black-list a few cases which yield pr-values of class type that don't
2655 // refer to temporaries of that type:
2657 // - implicit derived-to-base conversions
2658 if (isa<ImplicitCastExpr>(E)) {
2659 switch (cast<ImplicitCastExpr>(E)->getCastKind()) {
2660 case CK_DerivedToBase:
2661 case CK_UncheckedDerivedToBase:
2668 // - member expressions (all)
2669 if (isa<MemberExpr>(E))
2672 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E))
2673 if (BO->isPtrMemOp())
2676 // - opaque values (all)
2677 if (isa<OpaqueValueExpr>(E))
2683 bool Expr::isImplicitCXXThis() const {
2684 const Expr *E = this;
2686 // Strip away parentheses and casts we don't care about.
2688 if (const ParenExpr *Paren = dyn_cast<ParenExpr>(E)) {
2689 E = Paren->getSubExpr();
2693 if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2694 if (ICE->getCastKind() == CK_NoOp ||
2695 ICE->getCastKind() == CK_LValueToRValue ||
2696 ICE->getCastKind() == CK_DerivedToBase ||
2697 ICE->getCastKind() == CK_UncheckedDerivedToBase) {
2698 E = ICE->getSubExpr();
2703 if (const UnaryOperator* UnOp = dyn_cast<UnaryOperator>(E)) {
2704 if (UnOp->getOpcode() == UO_Extension) {
2705 E = UnOp->getSubExpr();
2710 if (const MaterializeTemporaryExpr *M
2711 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2712 E = M->GetTemporaryExpr();
2719 if (const CXXThisExpr *This = dyn_cast<CXXThisExpr>(E))
2720 return This->isImplicit();
2725 /// hasAnyTypeDependentArguments - Determines if any of the expressions
2726 /// in Exprs is type-dependent.
2727 bool Expr::hasAnyTypeDependentArguments(ArrayRef<Expr *> Exprs) {
2728 for (unsigned I = 0; I < Exprs.size(); ++I)
2729 if (Exprs[I]->isTypeDependent())
2735 bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef,
2736 const Expr **Culprit) const {
2737 // This function is attempting whether an expression is an initializer
2738 // which can be evaluated at compile-time. It very closely parallels
2739 // ConstExprEmitter in CGExprConstant.cpp; if they don't match, it
2740 // will lead to unexpected results. Like ConstExprEmitter, it falls back
2741 // to isEvaluatable most of the time.
2743 // If we ever capture reference-binding directly in the AST, we can
2744 // kill the second parameter.
2748 if (EvaluateAsLValue(Result, Ctx) && !Result.HasSideEffects)
2755 switch (getStmtClass()) {
2757 case StringLiteralClass:
2758 case ObjCEncodeExprClass:
2760 case CXXTemporaryObjectExprClass:
2761 case CXXConstructExprClass: {
2762 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
2764 if (CE->getConstructor()->isTrivial() &&
2765 CE->getConstructor()->getParent()->hasTrivialDestructor()) {
2766 // Trivial default constructor
2767 if (!CE->getNumArgs()) return true;
2769 // Trivial copy constructor
2770 assert(CE->getNumArgs() == 1 && "trivial ctor with > 1 argument");
2771 return CE->getArg(0)->isConstantInitializer(Ctx, false, Culprit);
2776 case CompoundLiteralExprClass: {
2777 // This handles gcc's extension that allows global initializers like
2778 // "struct x {int x;} x = (struct x) {};".
2779 // FIXME: This accepts other cases it shouldn't!
2780 const Expr *Exp = cast<CompoundLiteralExpr>(this)->getInitializer();
2781 return Exp->isConstantInitializer(Ctx, false, Culprit);
2783 case DesignatedInitUpdateExprClass: {
2784 const DesignatedInitUpdateExpr *DIUE = cast<DesignatedInitUpdateExpr>(this);
2785 return DIUE->getBase()->isConstantInitializer(Ctx, false, Culprit) &&
2786 DIUE->getUpdater()->isConstantInitializer(Ctx, false, Culprit);
2788 case InitListExprClass: {
2789 const InitListExpr *ILE = cast<InitListExpr>(this);
2790 if (ILE->getType()->isArrayType()) {
2791 unsigned numInits = ILE->getNumInits();
2792 for (unsigned i = 0; i < numInits; i++) {
2793 if (!ILE->getInit(i)->isConstantInitializer(Ctx, false, Culprit))
2799 if (ILE->getType()->isRecordType()) {
2800 unsigned ElementNo = 0;
2801 RecordDecl *RD = ILE->getType()->getAs<RecordType>()->getDecl();
2802 for (const auto *Field : RD->fields()) {
2803 // If this is a union, skip all the fields that aren't being initialized.
2804 if (RD->isUnion() && ILE->getInitializedFieldInUnion() != Field)
2807 // Don't emit anonymous bitfields, they just affect layout.
2808 if (Field->isUnnamedBitfield())
2811 if (ElementNo < ILE->getNumInits()) {
2812 const Expr *Elt = ILE->getInit(ElementNo++);
2813 if (Field->isBitField()) {
2814 // Bitfields have to evaluate to an integer.
2815 llvm::APSInt ResultTmp;
2816 if (!Elt->EvaluateAsInt(ResultTmp, Ctx)) {
2822 bool RefType = Field->getType()->isReferenceType();
2823 if (!Elt->isConstantInitializer(Ctx, RefType, Culprit))
2833 case ImplicitValueInitExprClass:
2834 case NoInitExprClass:
2836 case ParenExprClass:
2837 return cast<ParenExpr>(this)->getSubExpr()
2838 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2839 case GenericSelectionExprClass:
2840 return cast<GenericSelectionExpr>(this)->getResultExpr()
2841 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2842 case ChooseExprClass:
2843 if (cast<ChooseExpr>(this)->isConditionDependent()) {
2848 return cast<ChooseExpr>(this)->getChosenSubExpr()
2849 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2850 case UnaryOperatorClass: {
2851 const UnaryOperator* Exp = cast<UnaryOperator>(this);
2852 if (Exp->getOpcode() == UO_Extension)
2853 return Exp->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
2856 case CXXFunctionalCastExprClass:
2857 case CXXStaticCastExprClass:
2858 case ImplicitCastExprClass:
2859 case CStyleCastExprClass:
2860 case ObjCBridgedCastExprClass:
2861 case CXXDynamicCastExprClass:
2862 case CXXReinterpretCastExprClass:
2863 case CXXConstCastExprClass: {
2864 const CastExpr *CE = cast<CastExpr>(this);
2866 // Handle misc casts we want to ignore.
2867 if (CE->getCastKind() == CK_NoOp ||
2868 CE->getCastKind() == CK_LValueToRValue ||
2869 CE->getCastKind() == CK_ToUnion ||
2870 CE->getCastKind() == CK_ConstructorConversion ||
2871 CE->getCastKind() == CK_NonAtomicToAtomic ||
2872 CE->getCastKind() == CK_AtomicToNonAtomic)
2873 return CE->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
2877 case MaterializeTemporaryExprClass:
2878 return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
2879 ->isConstantInitializer(Ctx, false, Culprit);
2881 case SubstNonTypeTemplateParmExprClass:
2882 return cast<SubstNonTypeTemplateParmExpr>(this)->getReplacement()
2883 ->isConstantInitializer(Ctx, false, Culprit);
2884 case CXXDefaultArgExprClass:
2885 return cast<CXXDefaultArgExpr>(this)->getExpr()
2886 ->isConstantInitializer(Ctx, false, Culprit);
2887 case CXXDefaultInitExprClass:
2888 return cast<CXXDefaultInitExpr>(this)->getExpr()
2889 ->isConstantInitializer(Ctx, false, Culprit);
2891 if (isEvaluatable(Ctx))
2899 /// \brief Look for any side effects within a Stmt.
2900 class SideEffectFinder : public ConstEvaluatedExprVisitor<SideEffectFinder> {
2901 typedef ConstEvaluatedExprVisitor<SideEffectFinder> Inherited;
2902 const bool IncludePossibleEffects;
2903 bool HasSideEffects;
2906 explicit SideEffectFinder(const ASTContext &Context, bool IncludePossible)
2907 : Inherited(Context),
2908 IncludePossibleEffects(IncludePossible), HasSideEffects(false) { }
2910 bool hasSideEffects() const { return HasSideEffects; }
2912 void VisitExpr(const Expr *E) {
2913 if (!HasSideEffects &&
2914 E->HasSideEffects(Context, IncludePossibleEffects))
2915 HasSideEffects = true;
2920 bool Expr::HasSideEffects(const ASTContext &Ctx,
2921 bool IncludePossibleEffects) const {
2922 // In circumstances where we care about definite side effects instead of
2923 // potential side effects, we want to ignore expressions that are part of a
2924 // macro expansion as a potential side effect.
2925 if (!IncludePossibleEffects && getExprLoc().isMacroID())
2928 if (isInstantiationDependent())
2929 return IncludePossibleEffects;
2931 switch (getStmtClass()) {
2933 #define ABSTRACT_STMT(Type)
2934 #define STMT(Type, Base) case Type##Class:
2935 #define EXPR(Type, Base)
2936 #include "clang/AST/StmtNodes.inc"
2937 llvm_unreachable("unexpected Expr kind");
2939 case DependentScopeDeclRefExprClass:
2940 case CXXUnresolvedConstructExprClass:
2941 case CXXDependentScopeMemberExprClass:
2942 case UnresolvedLookupExprClass:
2943 case UnresolvedMemberExprClass:
2944 case PackExpansionExprClass:
2945 case SubstNonTypeTemplateParmPackExprClass:
2946 case FunctionParmPackExprClass:
2948 case CXXFoldExprClass:
2949 llvm_unreachable("shouldn't see dependent / unresolved nodes here");
2951 case DeclRefExprClass:
2952 case ObjCIvarRefExprClass:
2953 case PredefinedExprClass:
2954 case IntegerLiteralClass:
2955 case FloatingLiteralClass:
2956 case ImaginaryLiteralClass:
2957 case StringLiteralClass:
2958 case CharacterLiteralClass:
2959 case OffsetOfExprClass:
2960 case ImplicitValueInitExprClass:
2961 case UnaryExprOrTypeTraitExprClass:
2962 case AddrLabelExprClass:
2963 case GNUNullExprClass:
2964 case NoInitExprClass:
2965 case CXXBoolLiteralExprClass:
2966 case CXXNullPtrLiteralExprClass:
2967 case CXXThisExprClass:
2968 case CXXScalarValueInitExprClass:
2969 case TypeTraitExprClass:
2970 case ArrayTypeTraitExprClass:
2971 case ExpressionTraitExprClass:
2972 case CXXNoexceptExprClass:
2973 case SizeOfPackExprClass:
2974 case ObjCStringLiteralClass:
2975 case ObjCEncodeExprClass:
2976 case ObjCBoolLiteralExprClass:
2977 case CXXUuidofExprClass:
2978 case OpaqueValueExprClass:
2979 // These never have a side-effect.
2983 case CXXOperatorCallExprClass:
2984 case CXXMemberCallExprClass:
2985 case CUDAKernelCallExprClass:
2986 case UserDefinedLiteralClass: {
2987 // We don't know a call definitely has side effects, except for calls
2988 // to pure/const functions that definitely don't.
2989 // If the call itself is considered side-effect free, check the operands.
2990 const Decl *FD = cast<CallExpr>(this)->getCalleeDecl();
2991 bool IsPure = FD && (FD->hasAttr<ConstAttr>() || FD->hasAttr<PureAttr>());
2992 if (IsPure || !IncludePossibleEffects)
2997 case BlockExprClass:
2998 case CXXBindTemporaryExprClass:
2999 if (!IncludePossibleEffects)
3003 case MSPropertyRefExprClass:
3004 case CompoundAssignOperatorClass:
3005 case VAArgExprClass:
3006 case AtomicExprClass:
3007 case CXXThrowExprClass:
3008 case CXXNewExprClass:
3009 case CXXDeleteExprClass:
3010 case ExprWithCleanupsClass:
3011 // These always have a side-effect.
3014 case StmtExprClass: {
3015 // StmtExprs have a side-effect if any substatement does.
3016 SideEffectFinder Finder(Ctx, IncludePossibleEffects);
3017 Finder.Visit(cast<StmtExpr>(this)->getSubStmt());
3018 return Finder.hasSideEffects();
3021 case ParenExprClass:
3022 case ArraySubscriptExprClass:
3023 case MemberExprClass:
3024 case ConditionalOperatorClass:
3025 case BinaryConditionalOperatorClass:
3026 case CompoundLiteralExprClass:
3027 case ExtVectorElementExprClass:
3028 case DesignatedInitExprClass:
3029 case DesignatedInitUpdateExprClass:
3030 case ParenListExprClass:
3031 case CXXPseudoDestructorExprClass:
3032 case CXXStdInitializerListExprClass:
3033 case SubstNonTypeTemplateParmExprClass:
3034 case MaterializeTemporaryExprClass:
3035 case ShuffleVectorExprClass:
3036 case ConvertVectorExprClass:
3037 case AsTypeExprClass:
3038 // These have a side-effect if any subexpression does.
3041 case UnaryOperatorClass:
3042 if (cast<UnaryOperator>(this)->isIncrementDecrementOp())
3046 case BinaryOperatorClass:
3047 if (cast<BinaryOperator>(this)->isAssignmentOp())
3051 case InitListExprClass:
3052 // FIXME: The children for an InitListExpr doesn't include the array filler.
3053 if (const Expr *E = cast<InitListExpr>(this)->getArrayFiller())
3054 if (E->HasSideEffects(Ctx, IncludePossibleEffects))
3058 case GenericSelectionExprClass:
3059 return cast<GenericSelectionExpr>(this)->getResultExpr()->
3060 HasSideEffects(Ctx, IncludePossibleEffects);
3062 case ChooseExprClass:
3063 return cast<ChooseExpr>(this)->getChosenSubExpr()->HasSideEffects(
3064 Ctx, IncludePossibleEffects);
3066 case CXXDefaultArgExprClass:
3067 return cast<CXXDefaultArgExpr>(this)->getExpr()->HasSideEffects(
3068 Ctx, IncludePossibleEffects);
3070 case CXXDefaultInitExprClass: {
3071 const FieldDecl *FD = cast<CXXDefaultInitExpr>(this)->getField();
3072 if (const Expr *E = FD->getInClassInitializer())
3073 return E->HasSideEffects(Ctx, IncludePossibleEffects);
3074 // If we've not yet parsed the initializer, assume it has side-effects.
3078 case CXXDynamicCastExprClass: {
3079 // A dynamic_cast expression has side-effects if it can throw.
3080 const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(this);
3081 if (DCE->getTypeAsWritten()->isReferenceType() &&
3082 DCE->getCastKind() == CK_Dynamic)
3085 case ImplicitCastExprClass:
3086 case CStyleCastExprClass:
3087 case CXXStaticCastExprClass:
3088 case CXXReinterpretCastExprClass:
3089 case CXXConstCastExprClass:
3090 case CXXFunctionalCastExprClass: {
3091 // While volatile reads are side-effecting in both C and C++, we treat them
3092 // as having possible (not definite) side-effects. This allows idiomatic
3093 // code to behave without warning, such as sizeof(*v) for a volatile-
3094 // qualified pointer.
3095 if (!IncludePossibleEffects)
3098 const CastExpr *CE = cast<CastExpr>(this);
3099 if (CE->getCastKind() == CK_LValueToRValue &&
3100 CE->getSubExpr()->getType().isVolatileQualified())
3105 case CXXTypeidExprClass:
3106 // typeid might throw if its subexpression is potentially-evaluated, so has
3107 // side-effects in that case whether or not its subexpression does.
3108 return cast<CXXTypeidExpr>(this)->isPotentiallyEvaluated();
3110 case CXXConstructExprClass:
3111 case CXXTemporaryObjectExprClass: {
3112 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
3113 if (!CE->getConstructor()->isTrivial() && IncludePossibleEffects)
3115 // A trivial constructor does not add any side-effects of its own. Just look
3116 // at its arguments.
3120 case LambdaExprClass: {
3121 const LambdaExpr *LE = cast<LambdaExpr>(this);
3122 for (LambdaExpr::capture_iterator I = LE->capture_begin(),
3123 E = LE->capture_end(); I != E; ++I)
3124 if (I->getCaptureKind() == LCK_ByCopy)
3125 // FIXME: Only has a side-effect if the variable is volatile or if
3126 // the copy would invoke a non-trivial copy constructor.
3131 case PseudoObjectExprClass: {
3132 // Only look for side-effects in the semantic form, and look past
3133 // OpaqueValueExpr bindings in that form.
3134 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
3135 for (PseudoObjectExpr::const_semantics_iterator I = PO->semantics_begin(),
3136 E = PO->semantics_end();
3138 const Expr *Subexpr = *I;
3139 if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(Subexpr))
3140 Subexpr = OVE->getSourceExpr();
3141 if (Subexpr->HasSideEffects(Ctx, IncludePossibleEffects))
3147 case ObjCBoxedExprClass:
3148 case ObjCArrayLiteralClass:
3149 case ObjCDictionaryLiteralClass:
3150 case ObjCSelectorExprClass:
3151 case ObjCProtocolExprClass:
3152 case ObjCIsaExprClass:
3153 case ObjCIndirectCopyRestoreExprClass:
3154 case ObjCSubscriptRefExprClass:
3155 case ObjCBridgedCastExprClass:
3156 case ObjCMessageExprClass:
3157 case ObjCPropertyRefExprClass:
3158 // FIXME: Classify these cases better.
3159 if (IncludePossibleEffects)
3164 // Recurse to children.
3165 for (const Stmt *SubStmt : children())
3167 cast<Expr>(SubStmt)->HasSideEffects(Ctx, IncludePossibleEffects))
3174 /// \brief Look for a call to a non-trivial function within an expression.
3175 class NonTrivialCallFinder : public ConstEvaluatedExprVisitor<NonTrivialCallFinder>
3177 typedef ConstEvaluatedExprVisitor<NonTrivialCallFinder> Inherited;
3182 explicit NonTrivialCallFinder(const ASTContext &Context)
3183 : Inherited(Context), NonTrivial(false) { }
3185 bool hasNonTrivialCall() const { return NonTrivial; }
3187 void VisitCallExpr(const CallExpr *E) {
3188 if (const CXXMethodDecl *Method
3189 = dyn_cast_or_null<const CXXMethodDecl>(E->getCalleeDecl())) {
3190 if (Method->isTrivial()) {
3191 // Recurse to children of the call.
3192 Inherited::VisitStmt(E);
3200 void VisitCXXConstructExpr(const CXXConstructExpr *E) {
3201 if (E->getConstructor()->isTrivial()) {
3202 // Recurse to children of the call.
3203 Inherited::VisitStmt(E);
3210 void VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *E) {
3211 if (E->getTemporary()->getDestructor()->isTrivial()) {
3212 Inherited::VisitStmt(E);
3221 bool Expr::hasNonTrivialCall(const ASTContext &Ctx) const {
3222 NonTrivialCallFinder Finder(Ctx);
3224 return Finder.hasNonTrivialCall();
3227 /// isNullPointerConstant - C99 6.3.2.3p3 - Return whether this is a null
3228 /// pointer constant or not, as well as the specific kind of constant detected.
3229 /// Null pointer constants can be integer constant expressions with the
3230 /// value zero, casts of zero to void*, nullptr (C++0X), or __null
3231 /// (a GNU extension).
3232 Expr::NullPointerConstantKind
3233 Expr::isNullPointerConstant(ASTContext &Ctx,
3234 NullPointerConstantValueDependence NPC) const {
3235 if (isValueDependent() &&
3236 (!Ctx.getLangOpts().CPlusPlus11 || Ctx.getLangOpts().MSVCCompat)) {
3238 case NPC_NeverValueDependent:
3239 llvm_unreachable("Unexpected value dependent expression!");
3240 case NPC_ValueDependentIsNull:
3241 if (isTypeDependent() || getType()->isIntegralType(Ctx))
3242 return NPCK_ZeroExpression;
3244 return NPCK_NotNull;
3246 case NPC_ValueDependentIsNotNull:
3247 return NPCK_NotNull;
3251 // Strip off a cast to void*, if it exists. Except in C++.
3252 if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) {
3253 if (!Ctx.getLangOpts().CPlusPlus) {
3254 // Check that it is a cast to void*.
3255 if (const PointerType *PT = CE->getType()->getAs<PointerType>()) {
3256 QualType Pointee = PT->getPointeeType();
3257 if (!Pointee.hasQualifiers() &&
3258 Pointee->isVoidType() && // to void*
3259 CE->getSubExpr()->getType()->isIntegerType()) // from int.
3260 return CE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3263 } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) {
3264 // Ignore the ImplicitCastExpr type entirely.
3265 return ICE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3266 } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) {
3267 // Accept ((void*)0) as a null pointer constant, as many other
3268 // implementations do.
3269 return PE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3270 } else if (const GenericSelectionExpr *GE =
3271 dyn_cast<GenericSelectionExpr>(this)) {
3272 if (GE->isResultDependent())
3273 return NPCK_NotNull;
3274 return GE->getResultExpr()->isNullPointerConstant(Ctx, NPC);
3275 } else if (const ChooseExpr *CE = dyn_cast<ChooseExpr>(this)) {
3276 if (CE->isConditionDependent())
3277 return NPCK_NotNull;
3278 return CE->getChosenSubExpr()->isNullPointerConstant(Ctx, NPC);
3279 } else if (const CXXDefaultArgExpr *DefaultArg
3280 = dyn_cast<CXXDefaultArgExpr>(this)) {
3281 // See through default argument expressions.
3282 return DefaultArg->getExpr()->isNullPointerConstant(Ctx, NPC);
3283 } else if (const CXXDefaultInitExpr *DefaultInit
3284 = dyn_cast<CXXDefaultInitExpr>(this)) {
3285 // See through default initializer expressions.
3286 return DefaultInit->getExpr()->isNullPointerConstant(Ctx, NPC);
3287 } else if (isa<GNUNullExpr>(this)) {
3288 // The GNU __null extension is always a null pointer constant.
3289 return NPCK_GNUNull;
3290 } else if (const MaterializeTemporaryExpr *M
3291 = dyn_cast<MaterializeTemporaryExpr>(this)) {
3292 return M->GetTemporaryExpr()->isNullPointerConstant(Ctx, NPC);
3293 } else if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(this)) {
3294 if (const Expr *Source = OVE->getSourceExpr())
3295 return Source->isNullPointerConstant(Ctx, NPC);
3298 // C++11 nullptr_t is always a null pointer constant.
3299 if (getType()->isNullPtrType())
3300 return NPCK_CXX11_nullptr;
3302 if (const RecordType *UT = getType()->getAsUnionType())
3303 if (!Ctx.getLangOpts().CPlusPlus11 &&
3304 UT && UT->getDecl()->hasAttr<TransparentUnionAttr>())
3305 if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(this)){
3306 const Expr *InitExpr = CLE->getInitializer();
3307 if (const InitListExpr *ILE = dyn_cast<InitListExpr>(InitExpr))
3308 return ILE->getInit(0)->isNullPointerConstant(Ctx, NPC);
3310 // This expression must be an integer type.
3311 if (!getType()->isIntegerType() ||
3312 (Ctx.getLangOpts().CPlusPlus && getType()->isEnumeralType()))
3313 return NPCK_NotNull;
3315 if (Ctx.getLangOpts().CPlusPlus11) {
3316 // C++11 [conv.ptr]p1: A null pointer constant is an integer literal with
3317 // value zero or a prvalue of type std::nullptr_t.
3318 // Microsoft mode permits C++98 rules reflecting MSVC behavior.
3319 const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(this);
3320 if (Lit && !Lit->getValue())
3321 return NPCK_ZeroLiteral;
3322 else if (!Ctx.getLangOpts().MSVCCompat || !isCXX98IntegralConstantExpr(Ctx))
3323 return NPCK_NotNull;
3325 // If we have an integer constant expression, we need to *evaluate* it and
3326 // test for the value 0.
3327 if (!isIntegerConstantExpr(Ctx))
3328 return NPCK_NotNull;
3331 if (EvaluateKnownConstInt(Ctx) != 0)
3332 return NPCK_NotNull;
3334 if (isa<IntegerLiteral>(this))
3335 return NPCK_ZeroLiteral;
3336 return NPCK_ZeroExpression;
3339 /// \brief If this expression is an l-value for an Objective C
3340 /// property, find the underlying property reference expression.
3341 const ObjCPropertyRefExpr *Expr::getObjCProperty() const {
3342 const Expr *E = this;
3344 assert((E->getValueKind() == VK_LValue &&
3345 E->getObjectKind() == OK_ObjCProperty) &&
3346 "expression is not a property reference");
3347 E = E->IgnoreParenCasts();
3348 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
3349 if (BO->getOpcode() == BO_Comma) {
3358 return cast<ObjCPropertyRefExpr>(E);
3361 bool Expr::isObjCSelfExpr() const {
3362 const Expr *E = IgnoreParenImpCasts();
3364 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E);
3368 const ImplicitParamDecl *Param = dyn_cast<ImplicitParamDecl>(DRE->getDecl());
3372 const ObjCMethodDecl *M = dyn_cast<ObjCMethodDecl>(Param->getDeclContext());
3376 return M->getSelfDecl() == Param;
3379 FieldDecl *Expr::getSourceBitField() {
3380 Expr *E = this->IgnoreParens();
3382 while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3383 if (ICE->getCastKind() == CK_LValueToRValue ||
3384 (ICE->getValueKind() != VK_RValue && ICE->getCastKind() == CK_NoOp))
3385 E = ICE->getSubExpr()->IgnoreParens();
3390 if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E))
3391 if (FieldDecl *Field = dyn_cast<FieldDecl>(MemRef->getMemberDecl()))
3392 if (Field->isBitField())
3395 if (ObjCIvarRefExpr *IvarRef = dyn_cast<ObjCIvarRefExpr>(E))
3396 if (FieldDecl *Ivar = dyn_cast<FieldDecl>(IvarRef->getDecl()))
3397 if (Ivar->isBitField())
3400 if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E))
3401 if (FieldDecl *Field = dyn_cast<FieldDecl>(DeclRef->getDecl()))
3402 if (Field->isBitField())
3405 if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(E)) {
3406 if (BinOp->isAssignmentOp() && BinOp->getLHS())
3407 return BinOp->getLHS()->getSourceBitField();
3409 if (BinOp->getOpcode() == BO_Comma && BinOp->getRHS())
3410 return BinOp->getRHS()->getSourceBitField();
3413 if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(E))
3414 if (UnOp->isPrefix() && UnOp->isIncrementDecrementOp())
3415 return UnOp->getSubExpr()->getSourceBitField();
3420 bool Expr::refersToVectorElement() const {
3421 const Expr *E = this->IgnoreParens();
3423 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3424 if (ICE->getValueKind() != VK_RValue &&
3425 ICE->getCastKind() == CK_NoOp)
3426 E = ICE->getSubExpr()->IgnoreParens();
3431 if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E))
3432 return ASE->getBase()->getType()->isVectorType();
3434 if (isa<ExtVectorElementExpr>(E))
3440 /// isArrow - Return true if the base expression is a pointer to vector,
3441 /// return false if the base expression is a vector.
3442 bool ExtVectorElementExpr::isArrow() const {
3443 return getBase()->getType()->isPointerType();
3446 unsigned ExtVectorElementExpr::getNumElements() const {
3447 if (const VectorType *VT = getType()->getAs<VectorType>())
3448 return VT->getNumElements();
3452 /// containsDuplicateElements - Return true if any element access is repeated.
3453 bool ExtVectorElementExpr::containsDuplicateElements() const {
3454 // FIXME: Refactor this code to an accessor on the AST node which returns the
3455 // "type" of component access, and share with code below and in Sema.
3456 StringRef Comp = Accessor->getName();
3458 // Halving swizzles do not contain duplicate elements.
3459 if (Comp == "hi" || Comp == "lo" || Comp == "even" || Comp == "odd")
3462 // Advance past s-char prefix on hex swizzles.
3463 if (Comp[0] == 's' || Comp[0] == 'S')
3464 Comp = Comp.substr(1);
3466 for (unsigned i = 0, e = Comp.size(); i != e; ++i)
3467 if (Comp.substr(i + 1).find(Comp[i]) != StringRef::npos)
3473 /// getEncodedElementAccess - We encode the fields as a llvm ConstantArray.
3474 void ExtVectorElementExpr::getEncodedElementAccess(
3475 SmallVectorImpl<unsigned> &Elts) const {
3476 StringRef Comp = Accessor->getName();
3477 if (Comp[0] == 's' || Comp[0] == 'S')
3478 Comp = Comp.substr(1);
3480 bool isHi = Comp == "hi";
3481 bool isLo = Comp == "lo";
3482 bool isEven = Comp == "even";
3483 bool isOdd = Comp == "odd";
3485 for (unsigned i = 0, e = getNumElements(); i != e; ++i) {
3497 Index = ExtVectorType::getAccessorIdx(Comp[i]);
3499 Elts.push_back(Index);
3503 ObjCMessageExpr::ObjCMessageExpr(QualType T,
3505 SourceLocation LBracLoc,
3506 SourceLocation SuperLoc,
3507 bool IsInstanceSuper,
3510 ArrayRef<SourceLocation> SelLocs,
3511 SelectorLocationsKind SelLocsK,
3512 ObjCMethodDecl *Method,
3513 ArrayRef<Expr *> Args,
3514 SourceLocation RBracLoc,
3516 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary,
3517 /*TypeDependent=*/false, /*ValueDependent=*/false,
3518 /*InstantiationDependent=*/false,
3519 /*ContainsUnexpandedParameterPack=*/false),
3520 SelectorOrMethod(reinterpret_cast<uintptr_t>(Method? Method
3521 : Sel.getAsOpaquePtr())),
3522 Kind(IsInstanceSuper? SuperInstance : SuperClass),
3523 HasMethod(Method != nullptr), IsDelegateInitCall(false),
3524 IsImplicit(isImplicit), SuperLoc(SuperLoc), LBracLoc(LBracLoc),
3527 initArgsAndSelLocs(Args, SelLocs, SelLocsK);
3528 setReceiverPointer(SuperType.getAsOpaquePtr());
3531 ObjCMessageExpr::ObjCMessageExpr(QualType T,
3533 SourceLocation LBracLoc,
3534 TypeSourceInfo *Receiver,
3536 ArrayRef<SourceLocation> SelLocs,
3537 SelectorLocationsKind SelLocsK,
3538 ObjCMethodDecl *Method,
3539 ArrayRef<Expr *> Args,
3540 SourceLocation RBracLoc,
3542 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary, T->isDependentType(),
3543 T->isDependentType(), T->isInstantiationDependentType(),
3544 T->containsUnexpandedParameterPack()),
3545 SelectorOrMethod(reinterpret_cast<uintptr_t>(Method? Method
3546 : Sel.getAsOpaquePtr())),
3548 HasMethod(Method != nullptr), IsDelegateInitCall(false),
3549 IsImplicit(isImplicit), LBracLoc(LBracLoc), RBracLoc(RBracLoc)
3551 initArgsAndSelLocs(Args, SelLocs, SelLocsK);
3552 setReceiverPointer(Receiver);
3555 ObjCMessageExpr::ObjCMessageExpr(QualType T,
3557 SourceLocation LBracLoc,
3560 ArrayRef<SourceLocation> SelLocs,
3561 SelectorLocationsKind SelLocsK,
3562 ObjCMethodDecl *Method,
3563 ArrayRef<Expr *> Args,
3564 SourceLocation RBracLoc,
3566 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary, Receiver->isTypeDependent(),
3567 Receiver->isTypeDependent(),
3568 Receiver->isInstantiationDependent(),
3569 Receiver->containsUnexpandedParameterPack()),
3570 SelectorOrMethod(reinterpret_cast<uintptr_t>(Method? Method
3571 : Sel.getAsOpaquePtr())),
3573 HasMethod(Method != nullptr), IsDelegateInitCall(false),
3574 IsImplicit(isImplicit), LBracLoc(LBracLoc), RBracLoc(RBracLoc)
3576 initArgsAndSelLocs(Args, SelLocs, SelLocsK);
3577 setReceiverPointer(Receiver);
3580 void ObjCMessageExpr::initArgsAndSelLocs(ArrayRef<Expr *> Args,
3581 ArrayRef<SourceLocation> SelLocs,
3582 SelectorLocationsKind SelLocsK) {
3583 setNumArgs(Args.size());
3584 Expr **MyArgs = getArgs();
3585 for (unsigned I = 0; I != Args.size(); ++I) {
3586 if (Args[I]->isTypeDependent())
3587 ExprBits.TypeDependent = true;
3588 if (Args[I]->isValueDependent())
3589 ExprBits.ValueDependent = true;
3590 if (Args[I]->isInstantiationDependent())
3591 ExprBits.InstantiationDependent = true;
3592 if (Args[I]->containsUnexpandedParameterPack())
3593 ExprBits.ContainsUnexpandedParameterPack = true;
3595 MyArgs[I] = Args[I];
3598 SelLocsKind = SelLocsK;
3599 if (!isImplicit()) {
3600 if (SelLocsK == SelLoc_NonStandard)
3601 std::copy(SelLocs.begin(), SelLocs.end(), getStoredSelLocs());
3605 ObjCMessageExpr *ObjCMessageExpr::Create(const ASTContext &Context, QualType T,
3607 SourceLocation LBracLoc,
3608 SourceLocation SuperLoc,
3609 bool IsInstanceSuper,
3612 ArrayRef<SourceLocation> SelLocs,
3613 ObjCMethodDecl *Method,
3614 ArrayRef<Expr *> Args,
3615 SourceLocation RBracLoc,
3617 assert((!SelLocs.empty() || isImplicit) &&
3618 "No selector locs for non-implicit message");
3619 ObjCMessageExpr *Mem;
3620 SelectorLocationsKind SelLocsK = SelectorLocationsKind();
3622 Mem = alloc(Context, Args.size(), 0);
3624 Mem = alloc(Context, Args, RBracLoc, SelLocs, Sel, SelLocsK);
3625 return new (Mem) ObjCMessageExpr(T, VK, LBracLoc, SuperLoc, IsInstanceSuper,
3626 SuperType, Sel, SelLocs, SelLocsK,
3627 Method, Args, RBracLoc, isImplicit);
3630 ObjCMessageExpr *ObjCMessageExpr::Create(const ASTContext &Context, QualType T,
3632 SourceLocation LBracLoc,
3633 TypeSourceInfo *Receiver,
3635 ArrayRef<SourceLocation> SelLocs,
3636 ObjCMethodDecl *Method,
3637 ArrayRef<Expr *> Args,
3638 SourceLocation RBracLoc,
3640 assert((!SelLocs.empty() || isImplicit) &&
3641 "No selector locs for non-implicit message");
3642 ObjCMessageExpr *Mem;
3643 SelectorLocationsKind SelLocsK = SelectorLocationsKind();
3645 Mem = alloc(Context, Args.size(), 0);
3647 Mem = alloc(Context, Args, RBracLoc, SelLocs, Sel, SelLocsK);
3648 return new (Mem) ObjCMessageExpr(T, VK, LBracLoc, Receiver, Sel,
3649 SelLocs, SelLocsK, Method, Args, RBracLoc,
3653 ObjCMessageExpr *ObjCMessageExpr::Create(const ASTContext &Context, QualType T,
3655 SourceLocation LBracLoc,
3658 ArrayRef<SourceLocation> SelLocs,
3659 ObjCMethodDecl *Method,
3660 ArrayRef<Expr *> Args,
3661 SourceLocation RBracLoc,
3663 assert((!SelLocs.empty() || isImplicit) &&
3664 "No selector locs for non-implicit message");
3665 ObjCMessageExpr *Mem;
3666 SelectorLocationsKind SelLocsK = SelectorLocationsKind();
3668 Mem = alloc(Context, Args.size(), 0);
3670 Mem = alloc(Context, Args, RBracLoc, SelLocs, Sel, SelLocsK);
3671 return new (Mem) ObjCMessageExpr(T, VK, LBracLoc, Receiver, Sel,
3672 SelLocs, SelLocsK, Method, Args, RBracLoc,
3676 ObjCMessageExpr *ObjCMessageExpr::CreateEmpty(const ASTContext &Context,
3678 unsigned NumStoredSelLocs) {
3679 ObjCMessageExpr *Mem = alloc(Context, NumArgs, NumStoredSelLocs);
3680 return new (Mem) ObjCMessageExpr(EmptyShell(), NumArgs);
3683 ObjCMessageExpr *ObjCMessageExpr::alloc(const ASTContext &C,
3684 ArrayRef<Expr *> Args,
3685 SourceLocation RBraceLoc,
3686 ArrayRef<SourceLocation> SelLocs,
3688 SelectorLocationsKind &SelLocsK) {
3689 SelLocsK = hasStandardSelectorLocs(Sel, SelLocs, Args, RBraceLoc);
3690 unsigned NumStoredSelLocs = (SelLocsK == SelLoc_NonStandard) ? SelLocs.size()
3692 return alloc(C, Args.size(), NumStoredSelLocs);
3695 ObjCMessageExpr *ObjCMessageExpr::alloc(const ASTContext &C,
3697 unsigned NumStoredSelLocs) {
3698 unsigned Size = sizeof(ObjCMessageExpr) + sizeof(void *) +
3699 NumArgs * sizeof(Expr *) + NumStoredSelLocs * sizeof(SourceLocation);
3700 return (ObjCMessageExpr *)C.Allocate(Size,
3701 llvm::AlignOf<ObjCMessageExpr>::Alignment);
3704 void ObjCMessageExpr::getSelectorLocs(
3705 SmallVectorImpl<SourceLocation> &SelLocs) const {
3706 for (unsigned i = 0, e = getNumSelectorLocs(); i != e; ++i)
3707 SelLocs.push_back(getSelectorLoc(i));
3710 SourceRange ObjCMessageExpr::getReceiverRange() const {
3711 switch (getReceiverKind()) {
3713 return getInstanceReceiver()->getSourceRange();
3716 return getClassReceiverTypeInfo()->getTypeLoc().getSourceRange();
3720 return getSuperLoc();
3723 llvm_unreachable("Invalid ReceiverKind!");
3726 Selector ObjCMessageExpr::getSelector() const {
3728 return reinterpret_cast<const ObjCMethodDecl *>(SelectorOrMethod)
3730 return Selector(SelectorOrMethod);
3733 QualType ObjCMessageExpr::getReceiverType() const {
3734 switch (getReceiverKind()) {
3736 return getInstanceReceiver()->getType();
3738 return getClassReceiver();
3741 return getSuperType();
3744 llvm_unreachable("unexpected receiver kind");
3747 ObjCInterfaceDecl *ObjCMessageExpr::getReceiverInterface() const {
3748 QualType T = getReceiverType();
3750 if (const ObjCObjectPointerType *Ptr = T->getAs<ObjCObjectPointerType>())
3751 return Ptr->getInterfaceDecl();
3753 if (const ObjCObjectType *Ty = T->getAs<ObjCObjectType>())
3754 return Ty->getInterface();
3759 QualType ObjCPropertyRefExpr::getReceiverType(const ASTContext &ctx) const {
3760 if (isClassReceiver())
3761 return ctx.getObjCInterfaceType(getClassReceiver());
3763 if (isSuperReceiver())
3764 return getSuperReceiverType();
3766 return getBase()->getType();
3769 StringRef ObjCBridgedCastExpr::getBridgeKindName() const {
3770 switch (getBridgeKind()) {
3773 case OBC_BridgeTransfer:
3774 return "__bridge_transfer";
3775 case OBC_BridgeRetained:
3776 return "__bridge_retained";
3779 llvm_unreachable("Invalid BridgeKind!");
3782 ShuffleVectorExpr::ShuffleVectorExpr(const ASTContext &C, ArrayRef<Expr*> args,
3783 QualType Type, SourceLocation BLoc,
3785 : Expr(ShuffleVectorExprClass, Type, VK_RValue, OK_Ordinary,
3786 Type->isDependentType(), Type->isDependentType(),
3787 Type->isInstantiationDependentType(),
3788 Type->containsUnexpandedParameterPack()),
3789 BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(args.size())
3791 SubExprs = new (C) Stmt*[args.size()];
3792 for (unsigned i = 0; i != args.size(); i++) {
3793 if (args[i]->isTypeDependent())
3794 ExprBits.TypeDependent = true;
3795 if (args[i]->isValueDependent())
3796 ExprBits.ValueDependent = true;
3797 if (args[i]->isInstantiationDependent())
3798 ExprBits.InstantiationDependent = true;
3799 if (args[i]->containsUnexpandedParameterPack())
3800 ExprBits.ContainsUnexpandedParameterPack = true;
3802 SubExprs[i] = args[i];
3806 void ShuffleVectorExpr::setExprs(const ASTContext &C, ArrayRef<Expr *> Exprs) {
3807 if (SubExprs) C.Deallocate(SubExprs);
3809 this->NumExprs = Exprs.size();
3810 SubExprs = new (C) Stmt*[NumExprs];
3811 memcpy(SubExprs, Exprs.data(), sizeof(Expr *) * Exprs.size());
3814 GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
3815 SourceLocation GenericLoc, Expr *ControllingExpr,
3816 ArrayRef<TypeSourceInfo*> AssocTypes,
3817 ArrayRef<Expr*> AssocExprs,
3818 SourceLocation DefaultLoc,
3819 SourceLocation RParenLoc,
3820 bool ContainsUnexpandedParameterPack,
3821 unsigned ResultIndex)
3822 : Expr(GenericSelectionExprClass,
3823 AssocExprs[ResultIndex]->getType(),
3824 AssocExprs[ResultIndex]->getValueKind(),
3825 AssocExprs[ResultIndex]->getObjectKind(),
3826 AssocExprs[ResultIndex]->isTypeDependent(),
3827 AssocExprs[ResultIndex]->isValueDependent(),
3828 AssocExprs[ResultIndex]->isInstantiationDependent(),
3829 ContainsUnexpandedParameterPack),
3830 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3831 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3832 NumAssocs(AssocExprs.size()), ResultIndex(ResultIndex),
3833 GenericLoc(GenericLoc), DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3834 SubExprs[CONTROLLING] = ControllingExpr;
3835 assert(AssocTypes.size() == AssocExprs.size());
3836 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3837 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3840 GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
3841 SourceLocation GenericLoc, Expr *ControllingExpr,
3842 ArrayRef<TypeSourceInfo*> AssocTypes,
3843 ArrayRef<Expr*> AssocExprs,
3844 SourceLocation DefaultLoc,
3845 SourceLocation RParenLoc,
3846 bool ContainsUnexpandedParameterPack)
3847 : Expr(GenericSelectionExprClass,
3848 Context.DependentTy,
3851 /*isTypeDependent=*/true,
3852 /*isValueDependent=*/true,
3853 /*isInstantiationDependent=*/true,
3854 ContainsUnexpandedParameterPack),
3855 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3856 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3857 NumAssocs(AssocExprs.size()), ResultIndex(-1U), GenericLoc(GenericLoc),
3858 DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3859 SubExprs[CONTROLLING] = ControllingExpr;
3860 assert(AssocTypes.size() == AssocExprs.size());
3861 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3862 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3865 //===----------------------------------------------------------------------===//
3866 // DesignatedInitExpr
3867 //===----------------------------------------------------------------------===//
3869 IdentifierInfo *DesignatedInitExpr::Designator::getFieldName() const {
3870 assert(Kind == FieldDesignator && "Only valid on a field designator");
3871 if (Field.NameOrField & 0x01)
3872 return reinterpret_cast<IdentifierInfo *>(Field.NameOrField&~0x01);
3874 return getField()->getIdentifier();
3877 DesignatedInitExpr::DesignatedInitExpr(const ASTContext &C, QualType Ty,
3878 unsigned NumDesignators,
3879 const Designator *Designators,
3880 SourceLocation EqualOrColonLoc,
3882 ArrayRef<Expr*> IndexExprs,
3884 : Expr(DesignatedInitExprClass, Ty,
3885 Init->getValueKind(), Init->getObjectKind(),
3886 Init->isTypeDependent(), Init->isValueDependent(),
3887 Init->isInstantiationDependent(),
3888 Init->containsUnexpandedParameterPack()),
3889 EqualOrColonLoc(EqualOrColonLoc), GNUSyntax(GNUSyntax),
3890 NumDesignators(NumDesignators), NumSubExprs(IndexExprs.size() + 1) {
3891 this->Designators = new (C) Designator[NumDesignators];
3893 // Record the initializer itself.
3894 child_iterator Child = child_begin();
3897 // Copy the designators and their subexpressions, computing
3898 // value-dependence along the way.
3899 unsigned IndexIdx = 0;
3900 for (unsigned I = 0; I != NumDesignators; ++I) {
3901 this->Designators[I] = Designators[I];
3903 if (this->Designators[I].isArrayDesignator()) {
3904 // Compute type- and value-dependence.
3905 Expr *Index = IndexExprs[IndexIdx];
3906 if (Index->isTypeDependent() || Index->isValueDependent())
3907 ExprBits.TypeDependent = ExprBits.ValueDependent = true;
3908 if (Index->isInstantiationDependent())
3909 ExprBits.InstantiationDependent = true;
3910 // Propagate unexpanded parameter packs.
3911 if (Index->containsUnexpandedParameterPack())
3912 ExprBits.ContainsUnexpandedParameterPack = true;
3914 // Copy the index expressions into permanent storage.
3915 *Child++ = IndexExprs[IndexIdx++];
3916 } else if (this->Designators[I].isArrayRangeDesignator()) {
3917 // Compute type- and value-dependence.
3918 Expr *Start = IndexExprs[IndexIdx];
3919 Expr *End = IndexExprs[IndexIdx + 1];
3920 if (Start->isTypeDependent() || Start->isValueDependent() ||
3921 End->isTypeDependent() || End->isValueDependent()) {
3922 ExprBits.TypeDependent = ExprBits.ValueDependent = true;
3923 ExprBits.InstantiationDependent = true;
3924 } else if (Start->isInstantiationDependent() ||
3925 End->isInstantiationDependent()) {
3926 ExprBits.InstantiationDependent = true;
3929 // Propagate unexpanded parameter packs.
3930 if (Start->containsUnexpandedParameterPack() ||
3931 End->containsUnexpandedParameterPack())
3932 ExprBits.ContainsUnexpandedParameterPack = true;
3934 // Copy the start/end expressions into permanent storage.
3935 *Child++ = IndexExprs[IndexIdx++];
3936 *Child++ = IndexExprs[IndexIdx++];
3940 assert(IndexIdx == IndexExprs.size() && "Wrong number of index expressions");
3943 DesignatedInitExpr *
3944 DesignatedInitExpr::Create(const ASTContext &C, Designator *Designators,
3945 unsigned NumDesignators,
3946 ArrayRef<Expr*> IndexExprs,
3947 SourceLocation ColonOrEqualLoc,
3948 bool UsesColonSyntax, Expr *Init) {
3949 void *Mem = C.Allocate(sizeof(DesignatedInitExpr) +
3950 sizeof(Stmt *) * (IndexExprs.size() + 1),
3951 llvm::alignOf<DesignatedInitExpr>());
3952 return new (Mem) DesignatedInitExpr(C, C.VoidTy, NumDesignators, Designators,
3953 ColonOrEqualLoc, UsesColonSyntax,
3957 DesignatedInitExpr *DesignatedInitExpr::CreateEmpty(const ASTContext &C,
3958 unsigned NumIndexExprs) {
3959 void *Mem = C.Allocate(sizeof(DesignatedInitExpr) +
3960 sizeof(Stmt *) * (NumIndexExprs + 1), 8);
3961 return new (Mem) DesignatedInitExpr(NumIndexExprs + 1);
3964 void DesignatedInitExpr::setDesignators(const ASTContext &C,
3965 const Designator *Desigs,
3966 unsigned NumDesigs) {
3967 Designators = new (C) Designator[NumDesigs];
3968 NumDesignators = NumDesigs;
3969 for (unsigned I = 0; I != NumDesigs; ++I)
3970 Designators[I] = Desigs[I];
3973 SourceRange DesignatedInitExpr::getDesignatorsSourceRange() const {
3974 DesignatedInitExpr *DIE = const_cast<DesignatedInitExpr*>(this);
3976 return DIE->getDesignator(0)->getSourceRange();
3977 return SourceRange(DIE->getDesignator(0)->getLocStart(),
3978 DIE->getDesignator(size()-1)->getLocEnd());
3981 SourceLocation DesignatedInitExpr::getLocStart() const {
3982 SourceLocation StartLoc;
3984 *const_cast<DesignatedInitExpr*>(this)->designators_begin();
3985 if (First.isFieldDesignator()) {
3987 StartLoc = SourceLocation::getFromRawEncoding(First.Field.FieldLoc);
3989 StartLoc = SourceLocation::getFromRawEncoding(First.Field.DotLoc);
3992 SourceLocation::getFromRawEncoding(First.ArrayOrRange.LBracketLoc);
3996 SourceLocation DesignatedInitExpr::getLocEnd() const {
3997 return getInit()->getLocEnd();
4000 Expr *DesignatedInitExpr::getArrayIndex(const Designator& D) const {
4001 assert(D.Kind == Designator::ArrayDesignator && "Requires array designator");
4002 Stmt *const *SubExprs = reinterpret_cast<Stmt *const *>(this + 1);
4003 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 1));
4006 Expr *DesignatedInitExpr::getArrayRangeStart(const Designator &D) const {
4007 assert(D.Kind == Designator::ArrayRangeDesignator &&
4008 "Requires array range designator");
4009 Stmt *const *SubExprs = reinterpret_cast<Stmt *const *>(this + 1);
4010 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 1));
4013 Expr *DesignatedInitExpr::getArrayRangeEnd(const Designator &D) const {
4014 assert(D.Kind == Designator::ArrayRangeDesignator &&
4015 "Requires array range designator");
4016 Stmt *const *SubExprs = reinterpret_cast<Stmt *const *>(this + 1);
4017 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 2));
4020 /// \brief Replaces the designator at index @p Idx with the series
4021 /// of designators in [First, Last).
4022 void DesignatedInitExpr::ExpandDesignator(const ASTContext &C, unsigned Idx,
4023 const Designator *First,
4024 const Designator *Last) {
4025 unsigned NumNewDesignators = Last - First;
4026 if (NumNewDesignators == 0) {
4027 std::copy_backward(Designators + Idx + 1,
4028 Designators + NumDesignators,
4030 --NumNewDesignators;
4032 } else if (NumNewDesignators == 1) {
4033 Designators[Idx] = *First;
4037 Designator *NewDesignators
4038 = new (C) Designator[NumDesignators - 1 + NumNewDesignators];
4039 std::copy(Designators, Designators + Idx, NewDesignators);
4040 std::copy(First, Last, NewDesignators + Idx);
4041 std::copy(Designators + Idx + 1, Designators + NumDesignators,
4042 NewDesignators + Idx + NumNewDesignators);
4043 Designators = NewDesignators;
4044 NumDesignators = NumDesignators - 1 + NumNewDesignators;
4047 DesignatedInitUpdateExpr::DesignatedInitUpdateExpr(const ASTContext &C,
4048 SourceLocation lBraceLoc, Expr *baseExpr, SourceLocation rBraceLoc)
4049 : Expr(DesignatedInitUpdateExprClass, baseExpr->getType(), VK_RValue,
4050 OK_Ordinary, false, false, false, false) {
4051 BaseAndUpdaterExprs[0] = baseExpr;
4053 InitListExpr *ILE = new (C) InitListExpr(C, lBraceLoc, None, rBraceLoc);
4054 ILE->setType(baseExpr->getType());
4055 BaseAndUpdaterExprs[1] = ILE;
4058 SourceLocation DesignatedInitUpdateExpr::getLocStart() const {
4059 return getBase()->getLocStart();
4062 SourceLocation DesignatedInitUpdateExpr::getLocEnd() const {
4063 return getBase()->getLocEnd();
4066 ParenListExpr::ParenListExpr(const ASTContext& C, SourceLocation lparenloc,
4067 ArrayRef<Expr*> exprs,
4068 SourceLocation rparenloc)
4069 : Expr(ParenListExprClass, QualType(), VK_RValue, OK_Ordinary,
4070 false, false, false, false),
4071 NumExprs(exprs.size()), LParenLoc(lparenloc), RParenLoc(rparenloc) {
4072 Exprs = new (C) Stmt*[exprs.size()];
4073 for (unsigned i = 0; i != exprs.size(); ++i) {
4074 if (exprs[i]->isTypeDependent())
4075 ExprBits.TypeDependent = true;
4076 if (exprs[i]->isValueDependent())
4077 ExprBits.ValueDependent = true;
4078 if (exprs[i]->isInstantiationDependent())
4079 ExprBits.InstantiationDependent = true;
4080 if (exprs[i]->containsUnexpandedParameterPack())
4081 ExprBits.ContainsUnexpandedParameterPack = true;
4083 Exprs[i] = exprs[i];
4087 const OpaqueValueExpr *OpaqueValueExpr::findInCopyConstruct(const Expr *e) {
4088 if (const ExprWithCleanups *ewc = dyn_cast<ExprWithCleanups>(e))
4089 e = ewc->getSubExpr();
4090 if (const MaterializeTemporaryExpr *m = dyn_cast<MaterializeTemporaryExpr>(e))
4091 e = m->GetTemporaryExpr();
4092 e = cast<CXXConstructExpr>(e)->getArg(0);
4093 while (const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(e))
4094 e = ice->getSubExpr();
4095 return cast<OpaqueValueExpr>(e);
4098 PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &Context,
4100 unsigned numSemanticExprs) {
4101 void *buffer = Context.Allocate(sizeof(PseudoObjectExpr) +
4102 (1 + numSemanticExprs) * sizeof(Expr*),
4103 llvm::alignOf<PseudoObjectExpr>());
4104 return new(buffer) PseudoObjectExpr(sh, numSemanticExprs);
4107 PseudoObjectExpr::PseudoObjectExpr(EmptyShell shell, unsigned numSemanticExprs)
4108 : Expr(PseudoObjectExprClass, shell) {
4109 PseudoObjectExprBits.NumSubExprs = numSemanticExprs + 1;
4112 PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &C, Expr *syntax,
4113 ArrayRef<Expr*> semantics,
4114 unsigned resultIndex) {
4115 assert(syntax && "no syntactic expression!");
4116 assert(semantics.size() && "no semantic expressions!");
4120 if (resultIndex == NoResult) {
4124 assert(resultIndex < semantics.size());
4125 type = semantics[resultIndex]->getType();
4126 VK = semantics[resultIndex]->getValueKind();
4127 assert(semantics[resultIndex]->getObjectKind() == OK_Ordinary);
4130 void *buffer = C.Allocate(sizeof(PseudoObjectExpr) +
4131 (1 + semantics.size()) * sizeof(Expr*),
4132 llvm::alignOf<PseudoObjectExpr>());
4133 return new(buffer) PseudoObjectExpr(type, VK, syntax, semantics,
4137 PseudoObjectExpr::PseudoObjectExpr(QualType type, ExprValueKind VK,
4138 Expr *syntax, ArrayRef<Expr*> semantics,
4139 unsigned resultIndex)
4140 : Expr(PseudoObjectExprClass, type, VK, OK_Ordinary,
4141 /*filled in at end of ctor*/ false, false, false, false) {
4142 PseudoObjectExprBits.NumSubExprs = semantics.size() + 1;
4143 PseudoObjectExprBits.ResultIndex = resultIndex + 1;
4145 for (unsigned i = 0, e = semantics.size() + 1; i != e; ++i) {
4146 Expr *E = (i == 0 ? syntax : semantics[i-1]);
4147 getSubExprsBuffer()[i] = E;
4149 if (E->isTypeDependent())
4150 ExprBits.TypeDependent = true;
4151 if (E->isValueDependent())
4152 ExprBits.ValueDependent = true;
4153 if (E->isInstantiationDependent())
4154 ExprBits.InstantiationDependent = true;
4155 if (E->containsUnexpandedParameterPack())
4156 ExprBits.ContainsUnexpandedParameterPack = true;
4158 if (isa<OpaqueValueExpr>(E))
4159 assert(cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr &&
4160 "opaque-value semantic expressions for pseudo-object "
4161 "operations must have sources");
4165 //===----------------------------------------------------------------------===//
4166 // Child Iterators for iterating over subexpressions/substatements
4167 //===----------------------------------------------------------------------===//
4169 // UnaryExprOrTypeTraitExpr
4170 Stmt::child_range UnaryExprOrTypeTraitExpr::children() {
4171 // If this is of a type and the type is a VLA type (and not a typedef), the
4172 // size expression of the VLA needs to be treated as an executable expression.
4173 // Why isn't this weirdness documented better in StmtIterator?
4174 if (isArgumentType()) {
4175 if (const VariableArrayType* T = dyn_cast<VariableArrayType>(
4176 getArgumentType().getTypePtr()))
4177 return child_range(child_iterator(T), child_iterator());
4178 return child_range(child_iterator(), child_iterator());
4180 return child_range(&Argument.Ex, &Argument.Ex + 1);
4184 Stmt::child_range ObjCMessageExpr::children() {
4186 if (getReceiverKind() == Instance)
4187 begin = reinterpret_cast<Stmt **>(this + 1);
4189 begin = reinterpret_cast<Stmt **>(getArgs());
4190 return child_range(begin,
4191 reinterpret_cast<Stmt **>(getArgs() + getNumArgs()));
4194 ObjCArrayLiteral::ObjCArrayLiteral(ArrayRef<Expr *> Elements,
4195 QualType T, ObjCMethodDecl *Method,
4197 : Expr(ObjCArrayLiteralClass, T, VK_RValue, OK_Ordinary,
4198 false, false, false, false),
4199 NumElements(Elements.size()), Range(SR), ArrayWithObjectsMethod(Method)
4201 Expr **SaveElements = getElements();
4202 for (unsigned I = 0, N = Elements.size(); I != N; ++I) {
4203 if (Elements[I]->isTypeDependent() || Elements[I]->isValueDependent())
4204 ExprBits.ValueDependent = true;
4205 if (Elements[I]->isInstantiationDependent())
4206 ExprBits.InstantiationDependent = true;
4207 if (Elements[I]->containsUnexpandedParameterPack())
4208 ExprBits.ContainsUnexpandedParameterPack = true;
4210 SaveElements[I] = Elements[I];
4214 ObjCArrayLiteral *ObjCArrayLiteral::Create(const ASTContext &C,
4215 ArrayRef<Expr *> Elements,
4216 QualType T, ObjCMethodDecl * Method,
4218 void *Mem = C.Allocate(sizeof(ObjCArrayLiteral)
4219 + Elements.size() * sizeof(Expr *));
4220 return new (Mem) ObjCArrayLiteral(Elements, T, Method, SR);
4223 ObjCArrayLiteral *ObjCArrayLiteral::CreateEmpty(const ASTContext &C,
4224 unsigned NumElements) {
4226 void *Mem = C.Allocate(sizeof(ObjCArrayLiteral)
4227 + NumElements * sizeof(Expr *));
4228 return new (Mem) ObjCArrayLiteral(EmptyShell(), NumElements);
4231 ObjCDictionaryLiteral::ObjCDictionaryLiteral(
4232 ArrayRef<ObjCDictionaryElement> VK,
4233 bool HasPackExpansions,
4234 QualType T, ObjCMethodDecl *method,
4236 : Expr(ObjCDictionaryLiteralClass, T, VK_RValue, OK_Ordinary, false, false,
4238 NumElements(VK.size()), HasPackExpansions(HasPackExpansions), Range(SR),
4239 DictWithObjectsMethod(method)
4241 KeyValuePair *KeyValues = getKeyValues();
4242 ExpansionData *Expansions = getExpansionData();
4243 for (unsigned I = 0; I < NumElements; I++) {
4244 if (VK[I].Key->isTypeDependent() || VK[I].Key->isValueDependent() ||
4245 VK[I].Value->isTypeDependent() || VK[I].Value->isValueDependent())
4246 ExprBits.ValueDependent = true;
4247 if (VK[I].Key->isInstantiationDependent() ||
4248 VK[I].Value->isInstantiationDependent())
4249 ExprBits.InstantiationDependent = true;
4250 if (VK[I].EllipsisLoc.isInvalid() &&
4251 (VK[I].Key->containsUnexpandedParameterPack() ||
4252 VK[I].Value->containsUnexpandedParameterPack()))
4253 ExprBits.ContainsUnexpandedParameterPack = true;
4255 KeyValues[I].Key = VK[I].Key;
4256 KeyValues[I].Value = VK[I].Value;
4258 Expansions[I].EllipsisLoc = VK[I].EllipsisLoc;
4259 if (VK[I].NumExpansions)
4260 Expansions[I].NumExpansionsPlusOne = *VK[I].NumExpansions + 1;
4262 Expansions[I].NumExpansionsPlusOne = 0;
4267 ObjCDictionaryLiteral *
4268 ObjCDictionaryLiteral::Create(const ASTContext &C,
4269 ArrayRef<ObjCDictionaryElement> VK,
4270 bool HasPackExpansions,
4271 QualType T, ObjCMethodDecl *method,
4273 unsigned ExpansionsSize = 0;
4274 if (HasPackExpansions)
4275 ExpansionsSize = sizeof(ExpansionData) * VK.size();
4277 void *Mem = C.Allocate(sizeof(ObjCDictionaryLiteral) +
4278 sizeof(KeyValuePair) * VK.size() + ExpansionsSize);
4279 return new (Mem) ObjCDictionaryLiteral(VK, HasPackExpansions, T, method, SR);
4282 ObjCDictionaryLiteral *
4283 ObjCDictionaryLiteral::CreateEmpty(const ASTContext &C, unsigned NumElements,
4284 bool HasPackExpansions) {
4285 unsigned ExpansionsSize = 0;
4286 if (HasPackExpansions)
4287 ExpansionsSize = sizeof(ExpansionData) * NumElements;
4288 void *Mem = C.Allocate(sizeof(ObjCDictionaryLiteral) +
4289 sizeof(KeyValuePair) * NumElements + ExpansionsSize);
4290 return new (Mem) ObjCDictionaryLiteral(EmptyShell(), NumElements,
4294 ObjCSubscriptRefExpr *ObjCSubscriptRefExpr::Create(const ASTContext &C,
4296 Expr *key, QualType T,
4297 ObjCMethodDecl *getMethod,
4298 ObjCMethodDecl *setMethod,
4299 SourceLocation RB) {
4300 void *Mem = C.Allocate(sizeof(ObjCSubscriptRefExpr));
4301 return new (Mem) ObjCSubscriptRefExpr(base, key, T, VK_LValue,
4303 getMethod, setMethod, RB);
4306 AtomicExpr::AtomicExpr(SourceLocation BLoc, ArrayRef<Expr*> args,
4307 QualType t, AtomicOp op, SourceLocation RP)
4308 : Expr(AtomicExprClass, t, VK_RValue, OK_Ordinary,
4309 false, false, false, false),
4310 NumSubExprs(args.size()), BuiltinLoc(BLoc), RParenLoc(RP), Op(op)
4312 assert(args.size() == getNumSubExprs(op) && "wrong number of subexpressions");
4313 for (unsigned i = 0; i != args.size(); i++) {
4314 if (args[i]->isTypeDependent())
4315 ExprBits.TypeDependent = true;
4316 if (args[i]->isValueDependent())
4317 ExprBits.ValueDependent = true;
4318 if (args[i]->isInstantiationDependent())
4319 ExprBits.InstantiationDependent = true;
4320 if (args[i]->containsUnexpandedParameterPack())
4321 ExprBits.ContainsUnexpandedParameterPack = true;
4323 SubExprs[i] = args[i];
4327 unsigned AtomicExpr::getNumSubExprs(AtomicOp Op) {
4329 case AO__c11_atomic_init:
4330 case AO__c11_atomic_load:
4331 case AO__atomic_load_n:
4334 case AO__c11_atomic_store:
4335 case AO__c11_atomic_exchange:
4336 case AO__atomic_load:
4337 case AO__atomic_store:
4338 case AO__atomic_store_n:
4339 case AO__atomic_exchange_n:
4340 case AO__c11_atomic_fetch_add:
4341 case AO__c11_atomic_fetch_sub:
4342 case AO__c11_atomic_fetch_and:
4343 case AO__c11_atomic_fetch_or:
4344 case AO__c11_atomic_fetch_xor:
4345 case AO__atomic_fetch_add:
4346 case AO__atomic_fetch_sub:
4347 case AO__atomic_fetch_and:
4348 case AO__atomic_fetch_or:
4349 case AO__atomic_fetch_xor:
4350 case AO__atomic_fetch_nand:
4351 case AO__atomic_add_fetch:
4352 case AO__atomic_sub_fetch:
4353 case AO__atomic_and_fetch:
4354 case AO__atomic_or_fetch:
4355 case AO__atomic_xor_fetch:
4356 case AO__atomic_nand_fetch:
4359 case AO__atomic_exchange:
4362 case AO__c11_atomic_compare_exchange_strong:
4363 case AO__c11_atomic_compare_exchange_weak:
4366 case AO__atomic_compare_exchange:
4367 case AO__atomic_compare_exchange_n:
4370 llvm_unreachable("unknown atomic op");