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/ASTContext.h"
15 #include "clang/AST/Attr.h"
16 #include "clang/AST/DeclCXX.h"
17 #include "clang/AST/DeclObjC.h"
18 #include "clang/AST/DeclTemplate.h"
19 #include "clang/AST/EvaluatedExprVisitor.h"
20 #include "clang/AST/Expr.h"
21 #include "clang/AST/ExprCXX.h"
22 #include "clang/AST/Mangle.h"
23 #include "clang/AST/RecordLayout.h"
24 #include "clang/AST/StmtVisitor.h"
25 #include "clang/Basic/Builtins.h"
26 #include "clang/Basic/CharInfo.h"
27 #include "clang/Basic/SourceManager.h"
28 #include "clang/Basic/TargetInfo.h"
29 #include "clang/Lex/Lexer.h"
30 #include "clang/Lex/LiteralSupport.h"
31 #include "clang/Sema/SemaDiagnostic.h"
32 #include "llvm/Support/ErrorHandling.h"
33 #include "llvm/Support/raw_ostream.h"
36 using namespace clang;
38 const Expr *Expr::getBestDynamicClassTypeExpr() const {
41 E = E->ignoreParenBaseCasts();
43 // Follow the RHS of a comma operator.
44 if (auto *BO = dyn_cast<BinaryOperator>(E)) {
45 if (BO->getOpcode() == BO_Comma) {
51 // Step into initializer for materialized temporaries.
52 if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E)) {
53 E = MTE->GetTemporaryExpr();
63 const CXXRecordDecl *Expr::getBestDynamicClassType() const {
64 const Expr *E = getBestDynamicClassTypeExpr();
65 QualType DerivedType = E->getType();
66 if (const PointerType *PTy = DerivedType->getAs<PointerType>())
67 DerivedType = PTy->getPointeeType();
69 if (DerivedType->isDependentType())
72 const RecordType *Ty = DerivedType->castAs<RecordType>();
73 Decl *D = Ty->getDecl();
74 return cast<CXXRecordDecl>(D);
77 const Expr *Expr::skipRValueSubobjectAdjustments(
78 SmallVectorImpl<const Expr *> &CommaLHSs,
79 SmallVectorImpl<SubobjectAdjustment> &Adjustments) const {
82 E = E->IgnoreParens();
84 if (const CastExpr *CE = dyn_cast<CastExpr>(E)) {
85 if ((CE->getCastKind() == CK_DerivedToBase ||
86 CE->getCastKind() == CK_UncheckedDerivedToBase) &&
87 E->getType()->isRecordType()) {
89 CXXRecordDecl *Derived
90 = cast<CXXRecordDecl>(E->getType()->getAs<RecordType>()->getDecl());
91 Adjustments.push_back(SubobjectAdjustment(CE, Derived));
95 if (CE->getCastKind() == CK_NoOp) {
99 } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) {
100 if (!ME->isArrow()) {
101 assert(ME->getBase()->getType()->isRecordType());
102 if (FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl())) {
103 if (!Field->isBitField() && !Field->getType()->isReferenceType()) {
105 Adjustments.push_back(SubobjectAdjustment(Field));
110 } else if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
111 if (BO->isPtrMemOp()) {
112 assert(BO->getRHS()->isRValue());
114 const MemberPointerType *MPT =
115 BO->getRHS()->getType()->getAs<MemberPointerType>();
116 Adjustments.push_back(SubobjectAdjustment(MPT, BO->getRHS()));
118 } else if (BO->getOpcode() == BO_Comma) {
119 CommaLHSs.push_back(BO->getLHS());
131 /// isKnownToHaveBooleanValue - Return true if this is an integer expression
132 /// that is known to return 0 or 1. This happens for _Bool/bool expressions
133 /// but also int expressions which are produced by things like comparisons in
135 bool Expr::isKnownToHaveBooleanValue() const {
136 const Expr *E = IgnoreParens();
138 // If this value has _Bool type, it is obvious 0/1.
139 if (E->getType()->isBooleanType()) return true;
140 // If this is a non-scalar-integer type, we don't care enough to try.
141 if (!E->getType()->isIntegralOrEnumerationType()) return false;
143 if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
144 switch (UO->getOpcode()) {
146 return UO->getSubExpr()->isKnownToHaveBooleanValue();
154 // Only look through implicit casts. If the user writes
155 // '(int) (a && b)' treat it as an arbitrary int.
156 if (const ImplicitCastExpr *CE = dyn_cast<ImplicitCastExpr>(E))
157 return CE->getSubExpr()->isKnownToHaveBooleanValue();
159 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
160 switch (BO->getOpcode()) {
161 default: return false;
162 case BO_LT: // Relational operators.
166 case BO_EQ: // Equality operators.
168 case BO_LAnd: // AND operator.
169 case BO_LOr: // Logical OR operator.
172 case BO_And: // Bitwise AND operator.
173 case BO_Xor: // Bitwise XOR operator.
174 case BO_Or: // Bitwise OR operator.
175 // Handle things like (x==2)|(y==12).
176 return BO->getLHS()->isKnownToHaveBooleanValue() &&
177 BO->getRHS()->isKnownToHaveBooleanValue();
181 return BO->getRHS()->isKnownToHaveBooleanValue();
185 if (const ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E))
186 return CO->getTrueExpr()->isKnownToHaveBooleanValue() &&
187 CO->getFalseExpr()->isKnownToHaveBooleanValue();
192 // Amusing macro metaprogramming hack: check whether a class provides
193 // a more specific implementation of getExprLoc().
195 // See also Stmt.cpp:{getLocStart(),getLocEnd()}.
197 /// This implementation is used when a class provides a custom
198 /// implementation of getExprLoc.
199 template <class E, class T>
200 SourceLocation getExprLocImpl(const Expr *expr,
201 SourceLocation (T::*v)() const) {
202 return static_cast<const E*>(expr)->getExprLoc();
205 /// This implementation is used when a class doesn't provide
206 /// a custom implementation of getExprLoc. Overload resolution
207 /// should pick it over the implementation above because it's
208 /// more specialized according to function template partial ordering.
210 SourceLocation getExprLocImpl(const Expr *expr,
211 SourceLocation (Expr::*v)() const) {
212 return static_cast<const E*>(expr)->getLocStart();
216 SourceLocation Expr::getExprLoc() const {
217 switch (getStmtClass()) {
218 case Stmt::NoStmtClass: llvm_unreachable("statement without class");
219 #define ABSTRACT_STMT(type)
220 #define STMT(type, base) \
221 case Stmt::type##Class: break;
222 #define EXPR(type, base) \
223 case Stmt::type##Class: return getExprLocImpl<type>(this, &type::getExprLoc);
224 #include "clang/AST/StmtNodes.inc"
226 llvm_unreachable("unknown expression kind");
229 //===----------------------------------------------------------------------===//
230 // Primary Expressions.
231 //===----------------------------------------------------------------------===//
233 /// \brief Compute the type-, value-, and instantiation-dependence of a
234 /// declaration reference
235 /// based on the declaration being referenced.
236 static void computeDeclRefDependence(const ASTContext &Ctx, NamedDecl *D,
237 QualType T, bool &TypeDependent,
238 bool &ValueDependent,
239 bool &InstantiationDependent) {
240 TypeDependent = false;
241 ValueDependent = false;
242 InstantiationDependent = false;
244 // (TD) C++ [temp.dep.expr]p3:
245 // An id-expression is type-dependent if it contains:
249 // (VD) C++ [temp.dep.constexpr]p2:
250 // An identifier is value-dependent if it is:
252 // (TD) - an identifier that was declared with dependent type
253 // (VD) - a name declared with a dependent type,
254 if (T->isDependentType()) {
255 TypeDependent = true;
256 ValueDependent = true;
257 InstantiationDependent = true;
259 } else if (T->isInstantiationDependentType()) {
260 InstantiationDependent = true;
263 // (TD) - a conversion-function-id that specifies a dependent type
264 if (D->getDeclName().getNameKind()
265 == DeclarationName::CXXConversionFunctionName) {
266 QualType T = D->getDeclName().getCXXNameType();
267 if (T->isDependentType()) {
268 TypeDependent = true;
269 ValueDependent = true;
270 InstantiationDependent = true;
274 if (T->isInstantiationDependentType())
275 InstantiationDependent = true;
278 // (VD) - the name of a non-type template parameter,
279 if (isa<NonTypeTemplateParmDecl>(D)) {
280 ValueDependent = true;
281 InstantiationDependent = true;
285 // (VD) - a constant with integral or enumeration type and is
286 // initialized with an expression that is value-dependent.
287 // (VD) - a constant with literal type and is initialized with an
288 // expression that is value-dependent [C++11].
289 // (VD) - FIXME: Missing from the standard:
290 // - an entity with reference type and is initialized with an
291 // expression that is value-dependent [C++11]
292 if (VarDecl *Var = dyn_cast<VarDecl>(D)) {
293 if ((Ctx.getLangOpts().CPlusPlus11 ?
294 Var->getType()->isLiteralType(Ctx) :
295 Var->getType()->isIntegralOrEnumerationType()) &&
296 (Var->getType().isConstQualified() ||
297 Var->getType()->isReferenceType())) {
298 if (const Expr *Init = Var->getAnyInitializer())
299 if (Init->isValueDependent()) {
300 ValueDependent = true;
301 InstantiationDependent = true;
305 // (VD) - FIXME: Missing from the standard:
306 // - a member function or a static data member of the current
308 if (Var->isStaticDataMember() &&
309 Var->getDeclContext()->isDependentContext()) {
310 ValueDependent = true;
311 InstantiationDependent = true;
312 TypeSourceInfo *TInfo = Var->getFirstDecl()->getTypeSourceInfo();
313 if (TInfo->getType()->isIncompleteArrayType())
314 TypeDependent = true;
320 // (VD) - FIXME: Missing from the standard:
321 // - a member function or a static data member of the current
323 if (isa<CXXMethodDecl>(D) && D->getDeclContext()->isDependentContext()) {
324 ValueDependent = true;
325 InstantiationDependent = true;
329 void DeclRefExpr::computeDependence(const ASTContext &Ctx) {
330 bool TypeDependent = false;
331 bool ValueDependent = false;
332 bool InstantiationDependent = false;
333 computeDeclRefDependence(Ctx, getDecl(), getType(), TypeDependent,
334 ValueDependent, InstantiationDependent);
336 ExprBits.TypeDependent |= TypeDependent;
337 ExprBits.ValueDependent |= ValueDependent;
338 ExprBits.InstantiationDependent |= InstantiationDependent;
340 // Is the declaration a parameter pack?
341 if (getDecl()->isParameterPack())
342 ExprBits.ContainsUnexpandedParameterPack = true;
345 DeclRefExpr::DeclRefExpr(const ASTContext &Ctx,
346 NestedNameSpecifierLoc QualifierLoc,
347 SourceLocation TemplateKWLoc,
348 ValueDecl *D, bool RefersToEnclosingVariableOrCapture,
349 const DeclarationNameInfo &NameInfo,
351 const TemplateArgumentListInfo *TemplateArgs,
352 QualType T, ExprValueKind VK)
353 : Expr(DeclRefExprClass, T, VK, OK_Ordinary, false, false, false, false),
354 D(D), Loc(NameInfo.getLoc()), DNLoc(NameInfo.getInfo()) {
355 DeclRefExprBits.HasQualifier = QualifierLoc ? 1 : 0;
357 new (getTrailingObjects<NestedNameSpecifierLoc>())
358 NestedNameSpecifierLoc(QualifierLoc);
359 auto *NNS = QualifierLoc.getNestedNameSpecifier();
360 if (NNS->isInstantiationDependent())
361 ExprBits.InstantiationDependent = true;
362 if (NNS->containsUnexpandedParameterPack())
363 ExprBits.ContainsUnexpandedParameterPack = true;
365 DeclRefExprBits.HasFoundDecl = FoundD ? 1 : 0;
367 *getTrailingObjects<NamedDecl *>() = FoundD;
368 DeclRefExprBits.HasTemplateKWAndArgsInfo
369 = (TemplateArgs || TemplateKWLoc.isValid()) ? 1 : 0;
370 DeclRefExprBits.RefersToEnclosingVariableOrCapture =
371 RefersToEnclosingVariableOrCapture;
373 bool Dependent = false;
374 bool InstantiationDependent = false;
375 bool ContainsUnexpandedParameterPack = false;
376 getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
377 TemplateKWLoc, *TemplateArgs, getTrailingObjects<TemplateArgumentLoc>(),
378 Dependent, InstantiationDependent, ContainsUnexpandedParameterPack);
379 assert(!Dependent && "built a DeclRefExpr with dependent template args");
380 ExprBits.InstantiationDependent |= InstantiationDependent;
381 ExprBits.ContainsUnexpandedParameterPack |= ContainsUnexpandedParameterPack;
382 } else if (TemplateKWLoc.isValid()) {
383 getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
386 DeclRefExprBits.HadMultipleCandidates = 0;
388 computeDependence(Ctx);
391 DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
392 NestedNameSpecifierLoc QualifierLoc,
393 SourceLocation TemplateKWLoc,
395 bool RefersToEnclosingVariableOrCapture,
396 SourceLocation NameLoc,
400 const TemplateArgumentListInfo *TemplateArgs) {
401 return Create(Context, QualifierLoc, TemplateKWLoc, D,
402 RefersToEnclosingVariableOrCapture,
403 DeclarationNameInfo(D->getDeclName(), NameLoc),
404 T, VK, FoundD, TemplateArgs);
407 DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
408 NestedNameSpecifierLoc QualifierLoc,
409 SourceLocation TemplateKWLoc,
411 bool RefersToEnclosingVariableOrCapture,
412 const DeclarationNameInfo &NameInfo,
416 const TemplateArgumentListInfo *TemplateArgs) {
417 // Filter out cases where the found Decl is the same as the value refenenced.
421 bool HasTemplateKWAndArgsInfo = TemplateArgs || TemplateKWLoc.isValid();
423 totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *,
424 ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>(
425 QualifierLoc ? 1 : 0, FoundD ? 1 : 0,
426 HasTemplateKWAndArgsInfo ? 1 : 0,
427 TemplateArgs ? TemplateArgs->size() : 0);
429 void *Mem = Context.Allocate(Size, alignof(DeclRefExpr));
430 return new (Mem) DeclRefExpr(Context, QualifierLoc, TemplateKWLoc, D,
431 RefersToEnclosingVariableOrCapture,
432 NameInfo, FoundD, TemplateArgs, T, VK);
435 DeclRefExpr *DeclRefExpr::CreateEmpty(const ASTContext &Context,
438 bool HasTemplateKWAndArgsInfo,
439 unsigned NumTemplateArgs) {
440 assert(NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo);
442 totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *,
443 ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>(
444 HasQualifier ? 1 : 0, HasFoundDecl ? 1 : 0, HasTemplateKWAndArgsInfo,
446 void *Mem = Context.Allocate(Size, alignof(DeclRefExpr));
447 return new (Mem) DeclRefExpr(EmptyShell());
450 SourceLocation DeclRefExpr::getLocStart() const {
452 return getQualifierLoc().getBeginLoc();
453 return getNameInfo().getLocStart();
455 SourceLocation DeclRefExpr::getLocEnd() const {
456 if (hasExplicitTemplateArgs())
457 return getRAngleLoc();
458 return getNameInfo().getLocEnd();
461 PredefinedExpr::PredefinedExpr(SourceLocation L, QualType FNTy, IdentType IT,
463 : Expr(PredefinedExprClass, FNTy, VK_LValue, OK_Ordinary,
464 FNTy->isDependentType(), FNTy->isDependentType(),
465 FNTy->isInstantiationDependentType(),
466 /*ContainsUnexpandedParameterPack=*/false),
467 Loc(L), Type(IT), FnName(SL) {}
469 StringLiteral *PredefinedExpr::getFunctionName() {
470 return cast_or_null<StringLiteral>(FnName);
473 StringRef PredefinedExpr::getIdentTypeName(PredefinedExpr::IdentType IT) {
478 return "__FUNCTION__";
480 return "__FUNCDNAME__";
482 return "L__FUNCTION__";
484 return "__PRETTY_FUNCTION__";
486 return "__FUNCSIG__";
487 case PrettyFunctionNoVirtual:
490 llvm_unreachable("Unknown ident type for PredefinedExpr");
493 // FIXME: Maybe this should use DeclPrinter with a special "print predefined
494 // expr" policy instead.
495 std::string PredefinedExpr::ComputeName(IdentType IT, const Decl *CurrentDecl) {
496 ASTContext &Context = CurrentDecl->getASTContext();
498 if (IT == PredefinedExpr::FuncDName) {
499 if (const NamedDecl *ND = dyn_cast<NamedDecl>(CurrentDecl)) {
500 std::unique_ptr<MangleContext> MC;
501 MC.reset(Context.createMangleContext());
503 if (MC->shouldMangleDeclName(ND)) {
504 SmallString<256> Buffer;
505 llvm::raw_svector_ostream Out(Buffer);
506 if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(ND))
507 MC->mangleCXXCtor(CD, Ctor_Base, Out);
508 else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(ND))
509 MC->mangleCXXDtor(DD, Dtor_Base, Out);
511 MC->mangleName(ND, Out);
513 if (!Buffer.empty() && Buffer.front() == '\01')
514 return Buffer.substr(1);
517 return ND->getIdentifier()->getName();
521 if (isa<BlockDecl>(CurrentDecl)) {
522 // For blocks we only emit something if it is enclosed in a function
523 // For top-level block we'd like to include the name of variable, but we
524 // don't have it at this point.
525 auto DC = CurrentDecl->getDeclContext();
526 if (DC->isFileContext())
529 SmallString<256> Buffer;
530 llvm::raw_svector_ostream Out(Buffer);
531 if (auto *DCBlock = dyn_cast<BlockDecl>(DC))
532 // For nested blocks, propagate up to the parent.
533 Out << ComputeName(IT, DCBlock);
534 else if (auto *DCDecl = dyn_cast<Decl>(DC))
535 Out << ComputeName(IT, DCDecl) << "_block_invoke";
538 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(CurrentDecl)) {
539 if (IT != PrettyFunction && IT != PrettyFunctionNoVirtual && IT != FuncSig)
540 return FD->getNameAsString();
542 SmallString<256> Name;
543 llvm::raw_svector_ostream Out(Name);
545 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
546 if (MD->isVirtual() && IT != PrettyFunctionNoVirtual)
552 PrintingPolicy Policy(Context.getLangOpts());
554 llvm::raw_string_ostream POut(Proto);
556 const FunctionDecl *Decl = FD;
557 if (const FunctionDecl* Pattern = FD->getTemplateInstantiationPattern())
559 const FunctionType *AFT = Decl->getType()->getAs<FunctionType>();
560 const FunctionProtoType *FT = nullptr;
561 if (FD->hasWrittenPrototype())
562 FT = dyn_cast<FunctionProtoType>(AFT);
565 assert(FT && "We must have a written prototype in this case.");
566 switch (FT->getCallConv()) {
567 case CC_C: POut << "__cdecl "; break;
568 case CC_X86StdCall: POut << "__stdcall "; break;
569 case CC_X86FastCall: POut << "__fastcall "; break;
570 case CC_X86ThisCall: POut << "__thiscall "; break;
571 case CC_X86VectorCall: POut << "__vectorcall "; break;
572 case CC_X86RegCall: POut << "__regcall "; break;
573 // Only bother printing the conventions that MSVC knows about.
578 FD->printQualifiedName(POut, Policy);
582 for (unsigned i = 0, e = Decl->getNumParams(); i != e; ++i) {
584 POut << Decl->getParamDecl(i)->getType().stream(Policy);
587 if (FT->isVariadic()) {
588 if (FD->getNumParams()) POut << ", ";
594 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
595 const FunctionType *FT = MD->getType()->castAs<FunctionType>();
598 if (FT->isVolatile())
600 RefQualifierKind Ref = MD->getRefQualifier();
601 if (Ref == RQ_LValue)
603 else if (Ref == RQ_RValue)
607 typedef SmallVector<const ClassTemplateSpecializationDecl *, 8> SpecsTy;
609 const DeclContext *Ctx = FD->getDeclContext();
610 while (Ctx && isa<NamedDecl>(Ctx)) {
611 const ClassTemplateSpecializationDecl *Spec
612 = dyn_cast<ClassTemplateSpecializationDecl>(Ctx);
613 if (Spec && !Spec->isExplicitSpecialization())
614 Specs.push_back(Spec);
615 Ctx = Ctx->getParent();
618 std::string TemplateParams;
619 llvm::raw_string_ostream TOut(TemplateParams);
620 for (SpecsTy::reverse_iterator I = Specs.rbegin(), E = Specs.rend();
622 const TemplateParameterList *Params
623 = (*I)->getSpecializedTemplate()->getTemplateParameters();
624 const TemplateArgumentList &Args = (*I)->getTemplateArgs();
625 assert(Params->size() == Args.size());
626 for (unsigned i = 0, numParams = Params->size(); i != numParams; ++i) {
627 StringRef Param = Params->getParam(i)->getName();
628 if (Param.empty()) continue;
629 TOut << Param << " = ";
630 Args.get(i).print(Policy, TOut);
635 FunctionTemplateSpecializationInfo *FSI
636 = FD->getTemplateSpecializationInfo();
637 if (FSI && !FSI->isExplicitSpecialization()) {
638 const TemplateParameterList* Params
639 = FSI->getTemplate()->getTemplateParameters();
640 const TemplateArgumentList* Args = FSI->TemplateArguments;
641 assert(Params->size() == Args->size());
642 for (unsigned i = 0, e = Params->size(); i != e; ++i) {
643 StringRef Param = Params->getParam(i)->getName();
644 if (Param.empty()) continue;
645 TOut << Param << " = ";
646 Args->get(i).print(Policy, TOut);
652 if (!TemplateParams.empty()) {
653 // remove the trailing comma and space
654 TemplateParams.resize(TemplateParams.size() - 2);
655 POut << " [" << TemplateParams << "]";
660 // Print "auto" for all deduced return types. This includes C++1y return
661 // type deduction and lambdas. For trailing return types resolve the
662 // decltype expression. Otherwise print the real type when this is
663 // not a constructor or destructor.
664 if (isa<CXXMethodDecl>(FD) &&
665 cast<CXXMethodDecl>(FD)->getParent()->isLambda())
666 Proto = "auto " + Proto;
667 else if (FT && FT->getReturnType()->getAs<DecltypeType>())
669 ->getAs<DecltypeType>()
670 ->getUnderlyingType()
671 .getAsStringInternal(Proto, Policy);
672 else if (!isa<CXXConstructorDecl>(FD) && !isa<CXXDestructorDecl>(FD))
673 AFT->getReturnType().getAsStringInternal(Proto, Policy);
677 return Name.str().str();
679 if (const CapturedDecl *CD = dyn_cast<CapturedDecl>(CurrentDecl)) {
680 for (const DeclContext *DC = CD->getParent(); DC; DC = DC->getParent())
681 // Skip to its enclosing function or method, but not its enclosing
683 if (DC->isFunctionOrMethod() && (DC->getDeclKind() != Decl::Captured)) {
684 const Decl *D = Decl::castFromDeclContext(DC);
685 return ComputeName(IT, D);
687 llvm_unreachable("CapturedDecl not inside a function or method");
689 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(CurrentDecl)) {
690 SmallString<256> Name;
691 llvm::raw_svector_ostream Out(Name);
692 Out << (MD->isInstanceMethod() ? '-' : '+');
695 // For incorrect code, there might not be an ObjCInterfaceDecl. Do
696 // a null check to avoid a crash.
697 if (const ObjCInterfaceDecl *ID = MD->getClassInterface())
700 if (const ObjCCategoryImplDecl *CID =
701 dyn_cast<ObjCCategoryImplDecl>(MD->getDeclContext()))
702 Out << '(' << *CID << ')';
705 MD->getSelector().print(Out);
708 return Name.str().str();
710 if (isa<TranslationUnitDecl>(CurrentDecl) && IT == PrettyFunction) {
711 // __PRETTY_FUNCTION__ -> "top level", the others produce an empty string.
717 void APNumericStorage::setIntValue(const ASTContext &C,
718 const llvm::APInt &Val) {
722 BitWidth = Val.getBitWidth();
723 unsigned NumWords = Val.getNumWords();
724 const uint64_t* Words = Val.getRawData();
726 pVal = new (C) uint64_t[NumWords];
727 std::copy(Words, Words + NumWords, pVal);
728 } else if (NumWords == 1)
734 IntegerLiteral::IntegerLiteral(const ASTContext &C, const llvm::APInt &V,
735 QualType type, SourceLocation l)
736 : Expr(IntegerLiteralClass, type, VK_RValue, OK_Ordinary, false, false,
739 assert(type->isIntegerType() && "Illegal type in IntegerLiteral");
740 assert(V.getBitWidth() == C.getIntWidth(type) &&
741 "Integer type is not the correct size for constant.");
746 IntegerLiteral::Create(const ASTContext &C, const llvm::APInt &V,
747 QualType type, SourceLocation l) {
748 return new (C) IntegerLiteral(C, V, type, l);
752 IntegerLiteral::Create(const ASTContext &C, EmptyShell Empty) {
753 return new (C) IntegerLiteral(Empty);
756 FloatingLiteral::FloatingLiteral(const ASTContext &C, const llvm::APFloat &V,
757 bool isexact, QualType Type, SourceLocation L)
758 : Expr(FloatingLiteralClass, Type, VK_RValue, OK_Ordinary, false, false,
759 false, false), Loc(L) {
760 setSemantics(V.getSemantics());
761 FloatingLiteralBits.IsExact = isexact;
765 FloatingLiteral::FloatingLiteral(const ASTContext &C, EmptyShell Empty)
766 : Expr(FloatingLiteralClass, Empty) {
767 setRawSemantics(IEEEhalf);
768 FloatingLiteralBits.IsExact = false;
772 FloatingLiteral::Create(const ASTContext &C, const llvm::APFloat &V,
773 bool isexact, QualType Type, SourceLocation L) {
774 return new (C) FloatingLiteral(C, V, isexact, Type, L);
778 FloatingLiteral::Create(const ASTContext &C, EmptyShell Empty) {
779 return new (C) FloatingLiteral(C, Empty);
782 const llvm::fltSemantics &FloatingLiteral::getSemantics() const {
783 switch(FloatingLiteralBits.Semantics) {
785 return llvm::APFloat::IEEEhalf();
787 return llvm::APFloat::IEEEsingle();
789 return llvm::APFloat::IEEEdouble();
790 case x87DoubleExtended:
791 return llvm::APFloat::x87DoubleExtended();
793 return llvm::APFloat::IEEEquad();
794 case PPCDoubleDouble:
795 return llvm::APFloat::PPCDoubleDouble();
797 llvm_unreachable("Unrecognised floating semantics");
800 void FloatingLiteral::setSemantics(const llvm::fltSemantics &Sem) {
801 if (&Sem == &llvm::APFloat::IEEEhalf())
802 FloatingLiteralBits.Semantics = IEEEhalf;
803 else if (&Sem == &llvm::APFloat::IEEEsingle())
804 FloatingLiteralBits.Semantics = IEEEsingle;
805 else if (&Sem == &llvm::APFloat::IEEEdouble())
806 FloatingLiteralBits.Semantics = IEEEdouble;
807 else if (&Sem == &llvm::APFloat::x87DoubleExtended())
808 FloatingLiteralBits.Semantics = x87DoubleExtended;
809 else if (&Sem == &llvm::APFloat::IEEEquad())
810 FloatingLiteralBits.Semantics = IEEEquad;
811 else if (&Sem == &llvm::APFloat::PPCDoubleDouble())
812 FloatingLiteralBits.Semantics = PPCDoubleDouble;
814 llvm_unreachable("Unknown floating semantics");
817 /// getValueAsApproximateDouble - This returns the value as an inaccurate
818 /// double. Note that this may cause loss of precision, but is useful for
819 /// debugging dumps, etc.
820 double FloatingLiteral::getValueAsApproximateDouble() const {
821 llvm::APFloat V = getValue();
823 V.convert(llvm::APFloat::IEEEdouble(), llvm::APFloat::rmNearestTiesToEven,
825 return V.convertToDouble();
828 int StringLiteral::mapCharByteWidth(TargetInfo const &target,StringKind k) {
829 int CharByteWidth = 0;
833 CharByteWidth = target.getCharWidth();
836 CharByteWidth = target.getWCharWidth();
839 CharByteWidth = target.getChar16Width();
842 CharByteWidth = target.getChar32Width();
845 assert((CharByteWidth & 7) == 0 && "Assumes character size is byte multiple");
847 assert((CharByteWidth==1 || CharByteWidth==2 || CharByteWidth==4)
848 && "character byte widths supported are 1, 2, and 4 only");
849 return CharByteWidth;
852 StringLiteral *StringLiteral::Create(const ASTContext &C, StringRef Str,
853 StringKind Kind, bool Pascal, QualType Ty,
854 const SourceLocation *Loc,
856 assert(C.getAsConstantArrayType(Ty) &&
857 "StringLiteral must be of constant array type!");
859 // Allocate enough space for the StringLiteral plus an array of locations for
860 // any concatenated string tokens.
862 C.Allocate(sizeof(StringLiteral) + sizeof(SourceLocation) * (NumStrs - 1),
863 alignof(StringLiteral));
864 StringLiteral *SL = new (Mem) StringLiteral(Ty);
866 // OPTIMIZE: could allocate this appended to the StringLiteral.
867 SL->setString(C,Str,Kind,Pascal);
869 SL->TokLocs[0] = Loc[0];
870 SL->NumConcatenated = NumStrs;
873 memcpy(&SL->TokLocs[1], Loc+1, sizeof(SourceLocation)*(NumStrs-1));
877 StringLiteral *StringLiteral::CreateEmpty(const ASTContext &C,
880 C.Allocate(sizeof(StringLiteral) + sizeof(SourceLocation) * (NumStrs - 1),
881 alignof(StringLiteral));
882 StringLiteral *SL = new (Mem) StringLiteral(QualType());
883 SL->CharByteWidth = 0;
885 SL->NumConcatenated = NumStrs;
889 void StringLiteral::outputString(raw_ostream &OS) const {
891 case Ascii: break; // no prefix.
892 case Wide: OS << 'L'; break;
893 case UTF8: OS << "u8"; break;
894 case UTF16: OS << 'u'; break;
895 case UTF32: OS << 'U'; break;
898 static const char Hex[] = "0123456789ABCDEF";
900 unsigned LastSlashX = getLength();
901 for (unsigned I = 0, N = getLength(); I != N; ++I) {
902 switch (uint32_t Char = getCodeUnit(I)) {
904 // FIXME: Convert UTF-8 back to codepoints before rendering.
906 // Convert UTF-16 surrogate pairs back to codepoints before rendering.
907 // Leave invalid surrogates alone; we'll use \x for those.
908 if (getKind() == UTF16 && I != N - 1 && Char >= 0xd800 &&
910 uint32_t Trail = getCodeUnit(I + 1);
911 if (Trail >= 0xdc00 && Trail <= 0xdfff) {
912 Char = 0x10000 + ((Char - 0xd800) << 10) + (Trail - 0xdc00);
918 // If this is a wide string, output characters over 0xff using \x
919 // escapes. Otherwise, this is a UTF-16 or UTF-32 string, and Char is a
920 // codepoint: use \x escapes for invalid codepoints.
921 if (getKind() == Wide ||
922 (Char >= 0xd800 && Char <= 0xdfff) || Char >= 0x110000) {
923 // FIXME: Is this the best way to print wchar_t?
926 while ((Char >> Shift) == 0)
928 for (/**/; Shift >= 0; Shift -= 4)
929 OS << Hex[(Char >> Shift) & 15];
936 << Hex[(Char >> 20) & 15]
937 << Hex[(Char >> 16) & 15];
940 OS << Hex[(Char >> 12) & 15]
941 << Hex[(Char >> 8) & 15]
942 << Hex[(Char >> 4) & 15]
943 << Hex[(Char >> 0) & 15];
947 // If we used \x... for the previous character, and this character is a
948 // hexadecimal digit, prevent it being slurped as part of the \x.
949 if (LastSlashX + 1 == I) {
951 case '0': case '1': case '2': case '3': case '4':
952 case '5': case '6': case '7': case '8': case '9':
953 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
954 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
959 assert(Char <= 0xff &&
960 "Characters above 0xff should already have been handled.");
962 if (isPrintable(Char))
964 else // Output anything hard as an octal escape.
966 << (char)('0' + ((Char >> 6) & 7))
967 << (char)('0' + ((Char >> 3) & 7))
968 << (char)('0' + ((Char >> 0) & 7));
970 // Handle some common non-printable cases to make dumps prettier.
971 case '\\': OS << "\\\\"; break;
972 case '"': OS << "\\\""; break;
973 case '\a': OS << "\\a"; break;
974 case '\b': OS << "\\b"; break;
975 case '\f': OS << "\\f"; break;
976 case '\n': OS << "\\n"; break;
977 case '\r': OS << "\\r"; break;
978 case '\t': OS << "\\t"; break;
979 case '\v': OS << "\\v"; break;
985 void StringLiteral::setString(const ASTContext &C, StringRef Str,
986 StringKind Kind, bool IsPascal) {
987 //FIXME: we assume that the string data comes from a target that uses the same
988 // code unit size and endianess for the type of string.
990 this->IsPascal = IsPascal;
992 CharByteWidth = mapCharByteWidth(C.getTargetInfo(),Kind);
993 assert((Str.size()%CharByteWidth == 0)
994 && "size of data must be multiple of CharByteWidth");
995 Length = Str.size()/CharByteWidth;
997 switch(CharByteWidth) {
999 char *AStrData = new (C) char[Length];
1000 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
1001 StrData.asChar = AStrData;
1005 uint16_t *AStrData = new (C) uint16_t[Length];
1006 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
1007 StrData.asUInt16 = AStrData;
1011 uint32_t *AStrData = new (C) uint32_t[Length];
1012 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
1013 StrData.asUInt32 = AStrData;
1017 llvm_unreachable("unsupported CharByteWidth");
1021 /// getLocationOfByte - Return a source location that points to the specified
1022 /// byte of this string literal.
1024 /// Strings are amazingly complex. They can be formed from multiple tokens and
1025 /// can have escape sequences in them in addition to the usual trigraph and
1026 /// escaped newline business. This routine handles this complexity.
1028 /// The *StartToken sets the first token to be searched in this function and
1029 /// the *StartTokenByteOffset is the byte offset of the first token. Before
1030 /// returning, it updates the *StartToken to the TokNo of the token being found
1031 /// and sets *StartTokenByteOffset to the byte offset of the token in the
1033 /// Using these two parameters can reduce the time complexity from O(n^2) to
1034 /// O(n) if one wants to get the location of byte for all the tokens in a
1038 StringLiteral::getLocationOfByte(unsigned ByteNo, const SourceManager &SM,
1039 const LangOptions &Features,
1040 const TargetInfo &Target, unsigned *StartToken,
1041 unsigned *StartTokenByteOffset) const {
1042 assert((Kind == StringLiteral::Ascii || Kind == StringLiteral::UTF8) &&
1043 "Only narrow string literals are currently supported");
1045 // Loop over all of the tokens in this string until we find the one that
1046 // contains the byte we're looking for.
1048 unsigned StringOffset = 0;
1050 TokNo = *StartToken;
1051 if (StartTokenByteOffset) {
1052 StringOffset = *StartTokenByteOffset;
1053 ByteNo -= StringOffset;
1056 assert(TokNo < getNumConcatenated() && "Invalid byte number!");
1057 SourceLocation StrTokLoc = getStrTokenLoc(TokNo);
1059 // Get the spelling of the string so that we can get the data that makes up
1060 // the string literal, not the identifier for the macro it is potentially
1061 // expanded through.
1062 SourceLocation StrTokSpellingLoc = SM.getSpellingLoc(StrTokLoc);
1064 // Re-lex the token to get its length and original spelling.
1065 std::pair<FileID, unsigned> LocInfo =
1066 SM.getDecomposedLoc(StrTokSpellingLoc);
1067 bool Invalid = false;
1068 StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid);
1070 if (StartTokenByteOffset != nullptr)
1071 *StartTokenByteOffset = StringOffset;
1072 if (StartToken != nullptr)
1073 *StartToken = TokNo;
1074 return StrTokSpellingLoc;
1077 const char *StrData = Buffer.data()+LocInfo.second;
1079 // Create a lexer starting at the beginning of this token.
1080 Lexer TheLexer(SM.getLocForStartOfFile(LocInfo.first), Features,
1081 Buffer.begin(), StrData, Buffer.end());
1083 TheLexer.LexFromRawLexer(TheTok);
1085 // Use the StringLiteralParser to compute the length of the string in bytes.
1086 StringLiteralParser SLP(TheTok, SM, Features, Target);
1087 unsigned TokNumBytes = SLP.GetStringLength();
1089 // If the byte is in this token, return the location of the byte.
1090 if (ByteNo < TokNumBytes ||
1091 (ByteNo == TokNumBytes && TokNo == getNumConcatenated() - 1)) {
1092 unsigned Offset = SLP.getOffsetOfStringByte(TheTok, ByteNo);
1094 // Now that we know the offset of the token in the spelling, use the
1095 // preprocessor to get the offset in the original source.
1096 if (StartTokenByteOffset != nullptr)
1097 *StartTokenByteOffset = StringOffset;
1098 if (StartToken != nullptr)
1099 *StartToken = TokNo;
1100 return Lexer::AdvanceToTokenCharacter(StrTokLoc, Offset, SM, Features);
1103 // Move to the next string token.
1104 StringOffset += TokNumBytes;
1106 ByteNo -= TokNumBytes;
1112 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1113 /// corresponds to, e.g. "sizeof" or "[pre]++".
1114 StringRef UnaryOperator::getOpcodeStr(Opcode Op) {
1116 #define UNARY_OPERATION(Name, Spelling) case UO_##Name: return Spelling;
1117 #include "clang/AST/OperationKinds.def"
1119 llvm_unreachable("Unknown unary operator");
1123 UnaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix) {
1125 default: llvm_unreachable("No unary operator for overloaded function");
1126 case OO_PlusPlus: return Postfix ? UO_PostInc : UO_PreInc;
1127 case OO_MinusMinus: return Postfix ? UO_PostDec : UO_PreDec;
1128 case OO_Amp: return UO_AddrOf;
1129 case OO_Star: return UO_Deref;
1130 case OO_Plus: return UO_Plus;
1131 case OO_Minus: return UO_Minus;
1132 case OO_Tilde: return UO_Not;
1133 case OO_Exclaim: return UO_LNot;
1134 case OO_Coawait: return UO_Coawait;
1138 OverloadedOperatorKind UnaryOperator::getOverloadedOperator(Opcode Opc) {
1140 case UO_PostInc: case UO_PreInc: return OO_PlusPlus;
1141 case UO_PostDec: case UO_PreDec: return OO_MinusMinus;
1142 case UO_AddrOf: return OO_Amp;
1143 case UO_Deref: return OO_Star;
1144 case UO_Plus: return OO_Plus;
1145 case UO_Minus: return OO_Minus;
1146 case UO_Not: return OO_Tilde;
1147 case UO_LNot: return OO_Exclaim;
1148 case UO_Coawait: return OO_Coawait;
1149 default: return OO_None;
1154 //===----------------------------------------------------------------------===//
1155 // Postfix Operators.
1156 //===----------------------------------------------------------------------===//
1158 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, Expr *fn,
1159 ArrayRef<Expr *> preargs, ArrayRef<Expr *> args, QualType t,
1160 ExprValueKind VK, SourceLocation rparenloc)
1161 : Expr(SC, t, VK, OK_Ordinary, fn->isTypeDependent(),
1162 fn->isValueDependent(), fn->isInstantiationDependent(),
1163 fn->containsUnexpandedParameterPack()),
1164 NumArgs(args.size()) {
1166 unsigned NumPreArgs = preargs.size();
1167 SubExprs = new (C) Stmt *[args.size()+PREARGS_START+NumPreArgs];
1169 for (unsigned i = 0; i != NumPreArgs; ++i) {
1170 updateDependenciesFromArg(preargs[i]);
1171 SubExprs[i+PREARGS_START] = preargs[i];
1173 for (unsigned i = 0; i != args.size(); ++i) {
1174 updateDependenciesFromArg(args[i]);
1175 SubExprs[i+PREARGS_START+NumPreArgs] = args[i];
1178 CallExprBits.NumPreArgs = NumPreArgs;
1179 RParenLoc = rparenloc;
1182 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, Expr *fn,
1183 ArrayRef<Expr *> args, QualType t, ExprValueKind VK,
1184 SourceLocation rparenloc)
1185 : CallExpr(C, SC, fn, ArrayRef<Expr *>(), args, t, VK, rparenloc) {}
1187 CallExpr::CallExpr(const ASTContext &C, Expr *fn, ArrayRef<Expr *> args,
1188 QualType t, ExprValueKind VK, SourceLocation rparenloc)
1189 : CallExpr(C, CallExprClass, fn, ArrayRef<Expr *>(), args, t, VK, rparenloc) {
1192 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, EmptyShell Empty)
1193 : CallExpr(C, SC, /*NumPreArgs=*/0, Empty) {}
1195 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, unsigned NumPreArgs,
1197 : Expr(SC, Empty), SubExprs(nullptr), NumArgs(0) {
1198 // FIXME: Why do we allocate this?
1199 SubExprs = new (C) Stmt*[PREARGS_START+NumPreArgs]();
1200 CallExprBits.NumPreArgs = NumPreArgs;
1203 void CallExpr::updateDependenciesFromArg(Expr *Arg) {
1204 if (Arg->isTypeDependent())
1205 ExprBits.TypeDependent = true;
1206 if (Arg->isValueDependent())
1207 ExprBits.ValueDependent = true;
1208 if (Arg->isInstantiationDependent())
1209 ExprBits.InstantiationDependent = true;
1210 if (Arg->containsUnexpandedParameterPack())
1211 ExprBits.ContainsUnexpandedParameterPack = true;
1214 FunctionDecl *CallExpr::getDirectCallee() {
1215 return dyn_cast_or_null<FunctionDecl>(getCalleeDecl());
1218 Decl *CallExpr::getCalleeDecl() {
1219 return getCallee()->getReferencedDeclOfCallee();
1222 Decl *Expr::getReferencedDeclOfCallee() {
1223 Expr *CEE = IgnoreParenImpCasts();
1225 while (SubstNonTypeTemplateParmExpr *NTTP
1226 = dyn_cast<SubstNonTypeTemplateParmExpr>(CEE)) {
1227 CEE = NTTP->getReplacement()->IgnoreParenCasts();
1230 // If we're calling a dereference, look at the pointer instead.
1231 if (BinaryOperator *BO = dyn_cast<BinaryOperator>(CEE)) {
1232 if (BO->isPtrMemOp())
1233 CEE = BO->getRHS()->IgnoreParenCasts();
1234 } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(CEE)) {
1235 if (UO->getOpcode() == UO_Deref)
1236 CEE = UO->getSubExpr()->IgnoreParenCasts();
1238 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE))
1239 return DRE->getDecl();
1240 if (MemberExpr *ME = dyn_cast<MemberExpr>(CEE))
1241 return ME->getMemberDecl();
1246 /// setNumArgs - This changes the number of arguments present in this call.
1247 /// Any orphaned expressions are deleted by this, and any new operands are set
1249 void CallExpr::setNumArgs(const ASTContext& C, unsigned NumArgs) {
1250 // No change, just return.
1251 if (NumArgs == getNumArgs()) return;
1253 // If shrinking # arguments, just delete the extras and forgot them.
1254 if (NumArgs < getNumArgs()) {
1255 this->NumArgs = NumArgs;
1259 // Otherwise, we are growing the # arguments. New an bigger argument array.
1260 unsigned NumPreArgs = getNumPreArgs();
1261 Stmt **NewSubExprs = new (C) Stmt*[NumArgs+PREARGS_START+NumPreArgs];
1263 for (unsigned i = 0; i != getNumArgs()+PREARGS_START+NumPreArgs; ++i)
1264 NewSubExprs[i] = SubExprs[i];
1265 // Null out new args.
1266 for (unsigned i = getNumArgs()+PREARGS_START+NumPreArgs;
1267 i != NumArgs+PREARGS_START+NumPreArgs; ++i)
1268 NewSubExprs[i] = nullptr;
1270 if (SubExprs) C.Deallocate(SubExprs);
1271 SubExprs = NewSubExprs;
1272 this->NumArgs = NumArgs;
1275 /// getBuiltinCallee - If this is a call to a builtin, return the builtin ID. If
1277 unsigned CallExpr::getBuiltinCallee() const {
1278 // All simple function calls (e.g. func()) are implicitly cast to pointer to
1279 // function. As a result, we try and obtain the DeclRefExpr from the
1280 // ImplicitCastExpr.
1281 const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee());
1282 if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()).
1285 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr());
1289 const FunctionDecl *FDecl = dyn_cast<FunctionDecl>(DRE->getDecl());
1293 if (!FDecl->getIdentifier())
1296 return FDecl->getBuiltinID();
1299 bool CallExpr::isUnevaluatedBuiltinCall(const ASTContext &Ctx) const {
1300 if (unsigned BI = getBuiltinCallee())
1301 return Ctx.BuiltinInfo.isUnevaluated(BI);
1305 QualType CallExpr::getCallReturnType(const ASTContext &Ctx) const {
1306 const Expr *Callee = getCallee();
1307 QualType CalleeType = Callee->getType();
1308 if (const auto *FnTypePtr = CalleeType->getAs<PointerType>()) {
1309 CalleeType = FnTypePtr->getPointeeType();
1310 } else if (const auto *BPT = CalleeType->getAs<BlockPointerType>()) {
1311 CalleeType = BPT->getPointeeType();
1312 } else if (CalleeType->isSpecificPlaceholderType(BuiltinType::BoundMember)) {
1313 if (isa<CXXPseudoDestructorExpr>(Callee->IgnoreParens()))
1316 // This should never be overloaded and so should never return null.
1317 CalleeType = Expr::findBoundMemberType(Callee);
1320 const FunctionType *FnType = CalleeType->castAs<FunctionType>();
1321 return FnType->getReturnType();
1324 SourceLocation CallExpr::getLocStart() const {
1325 if (isa<CXXOperatorCallExpr>(this))
1326 return cast<CXXOperatorCallExpr>(this)->getLocStart();
1328 SourceLocation begin = getCallee()->getLocStart();
1329 if (begin.isInvalid() && getNumArgs() > 0 && getArg(0))
1330 begin = getArg(0)->getLocStart();
1333 SourceLocation CallExpr::getLocEnd() const {
1334 if (isa<CXXOperatorCallExpr>(this))
1335 return cast<CXXOperatorCallExpr>(this)->getLocEnd();
1337 SourceLocation end = getRParenLoc();
1338 if (end.isInvalid() && getNumArgs() > 0 && getArg(getNumArgs() - 1))
1339 end = getArg(getNumArgs() - 1)->getLocEnd();
1343 OffsetOfExpr *OffsetOfExpr::Create(const ASTContext &C, QualType type,
1344 SourceLocation OperatorLoc,
1345 TypeSourceInfo *tsi,
1346 ArrayRef<OffsetOfNode> comps,
1347 ArrayRef<Expr*> exprs,
1348 SourceLocation RParenLoc) {
1349 void *Mem = C.Allocate(
1350 totalSizeToAlloc<OffsetOfNode, Expr *>(comps.size(), exprs.size()));
1352 return new (Mem) OffsetOfExpr(C, type, OperatorLoc, tsi, comps, exprs,
1356 OffsetOfExpr *OffsetOfExpr::CreateEmpty(const ASTContext &C,
1357 unsigned numComps, unsigned numExprs) {
1359 C.Allocate(totalSizeToAlloc<OffsetOfNode, Expr *>(numComps, numExprs));
1360 return new (Mem) OffsetOfExpr(numComps, numExprs);
1363 OffsetOfExpr::OffsetOfExpr(const ASTContext &C, QualType type,
1364 SourceLocation OperatorLoc, TypeSourceInfo *tsi,
1365 ArrayRef<OffsetOfNode> comps, ArrayRef<Expr*> exprs,
1366 SourceLocation RParenLoc)
1367 : Expr(OffsetOfExprClass, type, VK_RValue, OK_Ordinary,
1368 /*TypeDependent=*/false,
1369 /*ValueDependent=*/tsi->getType()->isDependentType(),
1370 tsi->getType()->isInstantiationDependentType(),
1371 tsi->getType()->containsUnexpandedParameterPack()),
1372 OperatorLoc(OperatorLoc), RParenLoc(RParenLoc), TSInfo(tsi),
1373 NumComps(comps.size()), NumExprs(exprs.size())
1375 for (unsigned i = 0; i != comps.size(); ++i) {
1376 setComponent(i, comps[i]);
1379 for (unsigned i = 0; i != exprs.size(); ++i) {
1380 if (exprs[i]->isTypeDependent() || exprs[i]->isValueDependent())
1381 ExprBits.ValueDependent = true;
1382 if (exprs[i]->containsUnexpandedParameterPack())
1383 ExprBits.ContainsUnexpandedParameterPack = true;
1385 setIndexExpr(i, exprs[i]);
1389 IdentifierInfo *OffsetOfNode::getFieldName() const {
1390 assert(getKind() == Field || getKind() == Identifier);
1391 if (getKind() == Field)
1392 return getField()->getIdentifier();
1394 return reinterpret_cast<IdentifierInfo *> (Data & ~(uintptr_t)Mask);
1397 UnaryExprOrTypeTraitExpr::UnaryExprOrTypeTraitExpr(
1398 UnaryExprOrTypeTrait ExprKind, Expr *E, QualType resultType,
1399 SourceLocation op, SourceLocation rp)
1400 : Expr(UnaryExprOrTypeTraitExprClass, resultType, VK_RValue, OK_Ordinary,
1401 false, // Never type-dependent (C++ [temp.dep.expr]p3).
1402 // Value-dependent if the argument is type-dependent.
1403 E->isTypeDependent(), E->isInstantiationDependent(),
1404 E->containsUnexpandedParameterPack()),
1405 OpLoc(op), RParenLoc(rp) {
1406 UnaryExprOrTypeTraitExprBits.Kind = ExprKind;
1407 UnaryExprOrTypeTraitExprBits.IsType = false;
1410 // Check to see if we are in the situation where alignof(decl) should be
1411 // dependent because decl's alignment is dependent.
1412 if (ExprKind == UETT_AlignOf) {
1413 if (!isValueDependent() || !isInstantiationDependent()) {
1414 E = E->IgnoreParens();
1416 const ValueDecl *D = nullptr;
1417 if (const auto *DRE = dyn_cast<DeclRefExpr>(E))
1419 else if (const auto *ME = dyn_cast<MemberExpr>(E))
1420 D = ME->getMemberDecl();
1423 for (const auto *I : D->specific_attrs<AlignedAttr>()) {
1424 if (I->isAlignmentDependent()) {
1425 setValueDependent(true);
1426 setInstantiationDependent(true);
1435 MemberExpr *MemberExpr::Create(
1436 const ASTContext &C, Expr *base, bool isarrow, SourceLocation OperatorLoc,
1437 NestedNameSpecifierLoc QualifierLoc, SourceLocation TemplateKWLoc,
1438 ValueDecl *memberdecl, DeclAccessPair founddecl,
1439 DeclarationNameInfo nameinfo, const TemplateArgumentListInfo *targs,
1440 QualType ty, ExprValueKind vk, ExprObjectKind ok) {
1442 bool hasQualOrFound = (QualifierLoc ||
1443 founddecl.getDecl() != memberdecl ||
1444 founddecl.getAccess() != memberdecl->getAccess());
1446 bool HasTemplateKWAndArgsInfo = targs || TemplateKWLoc.isValid();
1448 totalSizeToAlloc<MemberExprNameQualifier, ASTTemplateKWAndArgsInfo,
1449 TemplateArgumentLoc>(hasQualOrFound ? 1 : 0,
1450 HasTemplateKWAndArgsInfo ? 1 : 0,
1451 targs ? targs->size() : 0);
1453 void *Mem = C.Allocate(Size, alignof(MemberExpr));
1454 MemberExpr *E = new (Mem)
1455 MemberExpr(base, isarrow, OperatorLoc, memberdecl, nameinfo, ty, vk, ok);
1457 if (hasQualOrFound) {
1458 // FIXME: Wrong. We should be looking at the member declaration we found.
1459 if (QualifierLoc && QualifierLoc.getNestedNameSpecifier()->isDependent()) {
1460 E->setValueDependent(true);
1461 E->setTypeDependent(true);
1462 E->setInstantiationDependent(true);
1464 else if (QualifierLoc &&
1465 QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent())
1466 E->setInstantiationDependent(true);
1468 E->HasQualifierOrFoundDecl = true;
1470 MemberExprNameQualifier *NQ =
1471 E->getTrailingObjects<MemberExprNameQualifier>();
1472 NQ->QualifierLoc = QualifierLoc;
1473 NQ->FoundDecl = founddecl;
1476 E->HasTemplateKWAndArgsInfo = (targs || TemplateKWLoc.isValid());
1479 bool Dependent = false;
1480 bool InstantiationDependent = false;
1481 bool ContainsUnexpandedParameterPack = false;
1482 E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
1483 TemplateKWLoc, *targs, E->getTrailingObjects<TemplateArgumentLoc>(),
1484 Dependent, InstantiationDependent, ContainsUnexpandedParameterPack);
1485 if (InstantiationDependent)
1486 E->setInstantiationDependent(true);
1487 } else if (TemplateKWLoc.isValid()) {
1488 E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
1495 SourceLocation MemberExpr::getLocStart() const {
1496 if (isImplicitAccess()) {
1498 return getQualifierLoc().getBeginLoc();
1502 // FIXME: We don't want this to happen. Rather, we should be able to
1503 // detect all kinds of implicit accesses more cleanly.
1504 SourceLocation BaseStartLoc = getBase()->getLocStart();
1505 if (BaseStartLoc.isValid())
1506 return BaseStartLoc;
1509 SourceLocation MemberExpr::getLocEnd() const {
1510 SourceLocation EndLoc = getMemberNameInfo().getEndLoc();
1511 if (hasExplicitTemplateArgs())
1512 EndLoc = getRAngleLoc();
1513 else if (EndLoc.isInvalid())
1514 EndLoc = getBase()->getLocEnd();
1518 bool CastExpr::CastConsistency() const {
1519 switch (getCastKind()) {
1520 case CK_DerivedToBase:
1521 case CK_UncheckedDerivedToBase:
1522 case CK_DerivedToBaseMemberPointer:
1523 case CK_BaseToDerived:
1524 case CK_BaseToDerivedMemberPointer:
1525 assert(!path_empty() && "Cast kind should have a base path!");
1528 case CK_CPointerToObjCPointerCast:
1529 assert(getType()->isObjCObjectPointerType());
1530 assert(getSubExpr()->getType()->isPointerType());
1531 goto CheckNoBasePath;
1533 case CK_BlockPointerToObjCPointerCast:
1534 assert(getType()->isObjCObjectPointerType());
1535 assert(getSubExpr()->getType()->isBlockPointerType());
1536 goto CheckNoBasePath;
1538 case CK_ReinterpretMemberPointer:
1539 assert(getType()->isMemberPointerType());
1540 assert(getSubExpr()->getType()->isMemberPointerType());
1541 goto CheckNoBasePath;
1544 // Arbitrary casts to C pointer types count as bitcasts.
1545 // Otherwise, we should only have block and ObjC pointer casts
1546 // here if they stay within the type kind.
1547 if (!getType()->isPointerType()) {
1548 assert(getType()->isObjCObjectPointerType() ==
1549 getSubExpr()->getType()->isObjCObjectPointerType());
1550 assert(getType()->isBlockPointerType() ==
1551 getSubExpr()->getType()->isBlockPointerType());
1553 goto CheckNoBasePath;
1555 case CK_AnyPointerToBlockPointerCast:
1556 assert(getType()->isBlockPointerType());
1557 assert(getSubExpr()->getType()->isAnyPointerType() &&
1558 !getSubExpr()->getType()->isBlockPointerType());
1559 goto CheckNoBasePath;
1561 case CK_CopyAndAutoreleaseBlockObject:
1562 assert(getType()->isBlockPointerType());
1563 assert(getSubExpr()->getType()->isBlockPointerType());
1564 goto CheckNoBasePath;
1566 case CK_FunctionToPointerDecay:
1567 assert(getType()->isPointerType());
1568 assert(getSubExpr()->getType()->isFunctionType());
1569 goto CheckNoBasePath;
1571 case CK_AddressSpaceConversion:
1572 assert(getType()->isPointerType());
1573 assert(getSubExpr()->getType()->isPointerType());
1574 assert(getType()->getPointeeType().getAddressSpace() !=
1575 getSubExpr()->getType()->getPointeeType().getAddressSpace());
1576 // These should not have an inheritance path.
1579 case CK_ArrayToPointerDecay:
1580 case CK_NullToMemberPointer:
1581 case CK_NullToPointer:
1582 case CK_ConstructorConversion:
1583 case CK_IntegralToPointer:
1584 case CK_PointerToIntegral:
1586 case CK_VectorSplat:
1587 case CK_IntegralCast:
1588 case CK_BooleanToSignedIntegral:
1589 case CK_IntegralToFloating:
1590 case CK_FloatingToIntegral:
1591 case CK_FloatingCast:
1592 case CK_ObjCObjectLValueCast:
1593 case CK_FloatingRealToComplex:
1594 case CK_FloatingComplexToReal:
1595 case CK_FloatingComplexCast:
1596 case CK_FloatingComplexToIntegralComplex:
1597 case CK_IntegralRealToComplex:
1598 case CK_IntegralComplexToReal:
1599 case CK_IntegralComplexCast:
1600 case CK_IntegralComplexToFloatingComplex:
1601 case CK_ARCProduceObject:
1602 case CK_ARCConsumeObject:
1603 case CK_ARCReclaimReturnedObject:
1604 case CK_ARCExtendBlockObject:
1605 case CK_ZeroToOCLEvent:
1606 case CK_ZeroToOCLQueue:
1607 case CK_IntToOCLSampler:
1608 assert(!getType()->isBooleanType() && "unheralded conversion to bool");
1609 goto CheckNoBasePath;
1612 case CK_LValueToRValue:
1614 case CK_AtomicToNonAtomic:
1615 case CK_NonAtomicToAtomic:
1616 case CK_PointerToBoolean:
1617 case CK_IntegralToBoolean:
1618 case CK_FloatingToBoolean:
1619 case CK_MemberPointerToBoolean:
1620 case CK_FloatingComplexToBoolean:
1621 case CK_IntegralComplexToBoolean:
1622 case CK_LValueBitCast: // -> bool&
1623 case CK_UserDefinedConversion: // operator bool()
1624 case CK_BuiltinFnToFnPtr:
1626 assert(path_empty() && "Cast kind should not have a base path!");
1632 const char *CastExpr::getCastKindName() const {
1633 switch (getCastKind()) {
1634 #define CAST_OPERATION(Name) case CK_##Name: return #Name;
1635 #include "clang/AST/OperationKinds.def"
1637 llvm_unreachable("Unhandled cast kind!");
1640 Expr *CastExpr::getSubExprAsWritten() {
1641 Expr *SubExpr = nullptr;
1644 SubExpr = E->getSubExpr();
1646 // Skip through reference binding to temporary.
1647 if (MaterializeTemporaryExpr *Materialize
1648 = dyn_cast<MaterializeTemporaryExpr>(SubExpr))
1649 SubExpr = Materialize->GetTemporaryExpr();
1651 // Skip any temporary bindings; they're implicit.
1652 if (CXXBindTemporaryExpr *Binder = dyn_cast<CXXBindTemporaryExpr>(SubExpr))
1653 SubExpr = Binder->getSubExpr();
1655 // Conversions by constructor and conversion functions have a
1656 // subexpression describing the call; strip it off.
1657 if (E->getCastKind() == CK_ConstructorConversion)
1658 SubExpr = cast<CXXConstructExpr>(SubExpr)->getArg(0);
1659 else if (E->getCastKind() == CK_UserDefinedConversion) {
1660 assert((isa<CXXMemberCallExpr>(SubExpr) ||
1661 isa<BlockExpr>(SubExpr)) &&
1662 "Unexpected SubExpr for CK_UserDefinedConversion.");
1663 if (isa<CXXMemberCallExpr>(SubExpr))
1664 SubExpr = cast<CXXMemberCallExpr>(SubExpr)->getImplicitObjectArgument();
1667 // If the subexpression we're left with is an implicit cast, look
1668 // through that, too.
1669 } while ((E = dyn_cast<ImplicitCastExpr>(SubExpr)));
1674 CXXBaseSpecifier **CastExpr::path_buffer() {
1675 switch (getStmtClass()) {
1676 #define ABSTRACT_STMT(x)
1677 #define CASTEXPR(Type, Base) \
1678 case Stmt::Type##Class: \
1679 return static_cast<Type *>(this)->getTrailingObjects<CXXBaseSpecifier *>();
1680 #define STMT(Type, Base)
1681 #include "clang/AST/StmtNodes.inc"
1683 llvm_unreachable("non-cast expressions not possible here");
1687 ImplicitCastExpr *ImplicitCastExpr::Create(const ASTContext &C, QualType T,
1688 CastKind Kind, Expr *Operand,
1689 const CXXCastPath *BasePath,
1691 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1692 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1693 ImplicitCastExpr *E =
1694 new (Buffer) ImplicitCastExpr(T, Kind, Operand, PathSize, VK);
1696 std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
1697 E->getTrailingObjects<CXXBaseSpecifier *>());
1701 ImplicitCastExpr *ImplicitCastExpr::CreateEmpty(const ASTContext &C,
1702 unsigned PathSize) {
1703 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1704 return new (Buffer) ImplicitCastExpr(EmptyShell(), PathSize);
1708 CStyleCastExpr *CStyleCastExpr::Create(const ASTContext &C, QualType T,
1709 ExprValueKind VK, CastKind K, Expr *Op,
1710 const CXXCastPath *BasePath,
1711 TypeSourceInfo *WrittenTy,
1712 SourceLocation L, SourceLocation R) {
1713 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1714 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1716 new (Buffer) CStyleCastExpr(T, VK, K, Op, PathSize, WrittenTy, L, R);
1718 std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
1719 E->getTrailingObjects<CXXBaseSpecifier *>());
1723 CStyleCastExpr *CStyleCastExpr::CreateEmpty(const ASTContext &C,
1724 unsigned PathSize) {
1725 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1726 return new (Buffer) CStyleCastExpr(EmptyShell(), PathSize);
1729 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1730 /// corresponds to, e.g. "<<=".
1731 StringRef BinaryOperator::getOpcodeStr(Opcode Op) {
1733 #define BINARY_OPERATION(Name, Spelling) case BO_##Name: return Spelling;
1734 #include "clang/AST/OperationKinds.def"
1736 llvm_unreachable("Invalid OpCode!");
1740 BinaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO) {
1742 default: llvm_unreachable("Not an overloadable binary operator");
1743 case OO_Plus: return BO_Add;
1744 case OO_Minus: return BO_Sub;
1745 case OO_Star: return BO_Mul;
1746 case OO_Slash: return BO_Div;
1747 case OO_Percent: return BO_Rem;
1748 case OO_Caret: return BO_Xor;
1749 case OO_Amp: return BO_And;
1750 case OO_Pipe: return BO_Or;
1751 case OO_Equal: return BO_Assign;
1752 case OO_Less: return BO_LT;
1753 case OO_Greater: return BO_GT;
1754 case OO_PlusEqual: return BO_AddAssign;
1755 case OO_MinusEqual: return BO_SubAssign;
1756 case OO_StarEqual: return BO_MulAssign;
1757 case OO_SlashEqual: return BO_DivAssign;
1758 case OO_PercentEqual: return BO_RemAssign;
1759 case OO_CaretEqual: return BO_XorAssign;
1760 case OO_AmpEqual: return BO_AndAssign;
1761 case OO_PipeEqual: return BO_OrAssign;
1762 case OO_LessLess: return BO_Shl;
1763 case OO_GreaterGreater: return BO_Shr;
1764 case OO_LessLessEqual: return BO_ShlAssign;
1765 case OO_GreaterGreaterEqual: return BO_ShrAssign;
1766 case OO_EqualEqual: return BO_EQ;
1767 case OO_ExclaimEqual: return BO_NE;
1768 case OO_LessEqual: return BO_LE;
1769 case OO_GreaterEqual: return BO_GE;
1770 case OO_AmpAmp: return BO_LAnd;
1771 case OO_PipePipe: return BO_LOr;
1772 case OO_Comma: return BO_Comma;
1773 case OO_ArrowStar: return BO_PtrMemI;
1777 OverloadedOperatorKind BinaryOperator::getOverloadedOperator(Opcode Opc) {
1778 static const OverloadedOperatorKind OverOps[] = {
1779 /* .* Cannot be overloaded */OO_None, OO_ArrowStar,
1780 OO_Star, OO_Slash, OO_Percent,
1782 OO_LessLess, OO_GreaterGreater,
1783 OO_Less, OO_Greater, OO_LessEqual, OO_GreaterEqual,
1784 OO_EqualEqual, OO_ExclaimEqual,
1790 OO_Equal, OO_StarEqual,
1791 OO_SlashEqual, OO_PercentEqual,
1792 OO_PlusEqual, OO_MinusEqual,
1793 OO_LessLessEqual, OO_GreaterGreaterEqual,
1794 OO_AmpEqual, OO_CaretEqual,
1798 return OverOps[Opc];
1801 InitListExpr::InitListExpr(const ASTContext &C, SourceLocation lbraceloc,
1802 ArrayRef<Expr*> initExprs, SourceLocation rbraceloc)
1803 : Expr(InitListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false,
1805 InitExprs(C, initExprs.size()),
1806 LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), AltForm(nullptr, true)
1808 sawArrayRangeDesignator(false);
1809 for (unsigned I = 0; I != initExprs.size(); ++I) {
1810 if (initExprs[I]->isTypeDependent())
1811 ExprBits.TypeDependent = true;
1812 if (initExprs[I]->isValueDependent())
1813 ExprBits.ValueDependent = true;
1814 if (initExprs[I]->isInstantiationDependent())
1815 ExprBits.InstantiationDependent = true;
1816 if (initExprs[I]->containsUnexpandedParameterPack())
1817 ExprBits.ContainsUnexpandedParameterPack = true;
1820 InitExprs.insert(C, InitExprs.end(), initExprs.begin(), initExprs.end());
1823 void InitListExpr::reserveInits(const ASTContext &C, unsigned NumInits) {
1824 if (NumInits > InitExprs.size())
1825 InitExprs.reserve(C, NumInits);
1828 void InitListExpr::resizeInits(const ASTContext &C, unsigned NumInits) {
1829 InitExprs.resize(C, NumInits, nullptr);
1832 Expr *InitListExpr::updateInit(const ASTContext &C, unsigned Init, Expr *expr) {
1833 if (Init >= InitExprs.size()) {
1834 InitExprs.insert(C, InitExprs.end(), Init - InitExprs.size() + 1, nullptr);
1835 setInit(Init, expr);
1839 Expr *Result = cast_or_null<Expr>(InitExprs[Init]);
1840 setInit(Init, expr);
1844 void InitListExpr::setArrayFiller(Expr *filler) {
1845 assert(!hasArrayFiller() && "Filler already set!");
1846 ArrayFillerOrUnionFieldInit = filler;
1847 // Fill out any "holes" in the array due to designated initializers.
1848 Expr **inits = getInits();
1849 for (unsigned i = 0, e = getNumInits(); i != e; ++i)
1850 if (inits[i] == nullptr)
1854 bool InitListExpr::isStringLiteralInit() const {
1855 if (getNumInits() != 1)
1857 const ArrayType *AT = getType()->getAsArrayTypeUnsafe();
1858 if (!AT || !AT->getElementType()->isIntegerType())
1860 // It is possible for getInit() to return null.
1861 const Expr *Init = getInit(0);
1864 Init = Init->IgnoreParens();
1865 return isa<StringLiteral>(Init) || isa<ObjCEncodeExpr>(Init);
1868 bool InitListExpr::isTransparent() const {
1869 assert(isSemanticForm() && "syntactic form never semantically transparent");
1871 // A glvalue InitListExpr is always just sugar.
1873 assert(getNumInits() == 1 && "multiple inits in glvalue init list");
1877 // Otherwise, we're sugar if and only if we have exactly one initializer that
1878 // is of the same type.
1879 if (getNumInits() != 1 || !getInit(0))
1882 return getType().getCanonicalType() ==
1883 getInit(0)->getType().getCanonicalType();
1886 SourceLocation InitListExpr::getLocStart() const {
1887 if (InitListExpr *SyntacticForm = getSyntacticForm())
1888 return SyntacticForm->getLocStart();
1889 SourceLocation Beg = LBraceLoc;
1890 if (Beg.isInvalid()) {
1891 // Find the first non-null initializer.
1892 for (InitExprsTy::const_iterator I = InitExprs.begin(),
1893 E = InitExprs.end();
1896 Beg = S->getLocStart();
1904 SourceLocation InitListExpr::getLocEnd() const {
1905 if (InitListExpr *SyntacticForm = getSyntacticForm())
1906 return SyntacticForm->getLocEnd();
1907 SourceLocation End = RBraceLoc;
1908 if (End.isInvalid()) {
1909 // Find the first non-null initializer from the end.
1910 for (InitExprsTy::const_reverse_iterator I = InitExprs.rbegin(),
1911 E = InitExprs.rend();
1914 End = S->getLocEnd();
1922 /// getFunctionType - Return the underlying function type for this block.
1924 const FunctionProtoType *BlockExpr::getFunctionType() const {
1925 // The block pointer is never sugared, but the function type might be.
1926 return cast<BlockPointerType>(getType())
1927 ->getPointeeType()->castAs<FunctionProtoType>();
1930 SourceLocation BlockExpr::getCaretLocation() const {
1931 return TheBlock->getCaretLocation();
1933 const Stmt *BlockExpr::getBody() const {
1934 return TheBlock->getBody();
1936 Stmt *BlockExpr::getBody() {
1937 return TheBlock->getBody();
1941 //===----------------------------------------------------------------------===//
1942 // Generic Expression Routines
1943 //===----------------------------------------------------------------------===//
1945 /// isUnusedResultAWarning - Return true if this immediate expression should
1946 /// be warned about if the result is unused. If so, fill in Loc and Ranges
1947 /// with location to warn on and the source range[s] to report with the
1949 bool Expr::isUnusedResultAWarning(const Expr *&WarnE, SourceLocation &Loc,
1950 SourceRange &R1, SourceRange &R2,
1951 ASTContext &Ctx) const {
1952 // Don't warn if the expr is type dependent. The type could end up
1953 // instantiating to void.
1954 if (isTypeDependent())
1957 switch (getStmtClass()) {
1959 if (getType()->isVoidType())
1963 R1 = getSourceRange();
1965 case ParenExprClass:
1966 return cast<ParenExpr>(this)->getSubExpr()->
1967 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
1968 case GenericSelectionExprClass:
1969 return cast<GenericSelectionExpr>(this)->getResultExpr()->
1970 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
1971 case ChooseExprClass:
1972 return cast<ChooseExpr>(this)->getChosenSubExpr()->
1973 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
1974 case UnaryOperatorClass: {
1975 const UnaryOperator *UO = cast<UnaryOperator>(this);
1977 switch (UO->getOpcode()) {
1986 // This is just the 'operator co_await' call inside the guts of a
1987 // dependent co_await call.
1991 case UO_PreDec: // ++/--
1992 return false; // Not a warning.
1995 // accessing a piece of a volatile complex is a side-effect.
1996 if (Ctx.getCanonicalType(UO->getSubExpr()->getType())
1997 .isVolatileQualified())
2001 return UO->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2004 Loc = UO->getOperatorLoc();
2005 R1 = UO->getSubExpr()->getSourceRange();
2008 case BinaryOperatorClass: {
2009 const BinaryOperator *BO = cast<BinaryOperator>(this);
2010 switch (BO->getOpcode()) {
2013 // Consider the RHS of comma for side effects. LHS was checked by
2014 // Sema::CheckCommaOperands.
2016 // ((foo = <blah>), 0) is an idiom for hiding the result (and
2017 // lvalue-ness) of an assignment written in a macro.
2018 if (IntegerLiteral *IE =
2019 dyn_cast<IntegerLiteral>(BO->getRHS()->IgnoreParens()))
2020 if (IE->getValue() == 0)
2022 return BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2023 // Consider '||', '&&' to have side effects if the LHS or RHS does.
2026 if (!BO->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) ||
2027 !BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2031 if (BO->isAssignmentOp())
2034 Loc = BO->getOperatorLoc();
2035 R1 = BO->getLHS()->getSourceRange();
2036 R2 = BO->getRHS()->getSourceRange();
2039 case CompoundAssignOperatorClass:
2040 case VAArgExprClass:
2041 case AtomicExprClass:
2044 case ConditionalOperatorClass: {
2045 // If only one of the LHS or RHS is a warning, the operator might
2046 // be being used for control flow. Only warn if both the LHS and
2047 // RHS are warnings.
2048 const ConditionalOperator *Exp = cast<ConditionalOperator>(this);
2049 if (!Exp->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2053 return Exp->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2056 case MemberExprClass:
2058 Loc = cast<MemberExpr>(this)->getMemberLoc();
2059 R1 = SourceRange(Loc, Loc);
2060 R2 = cast<MemberExpr>(this)->getBase()->getSourceRange();
2063 case ArraySubscriptExprClass:
2065 Loc = cast<ArraySubscriptExpr>(this)->getRBracketLoc();
2066 R1 = cast<ArraySubscriptExpr>(this)->getLHS()->getSourceRange();
2067 R2 = cast<ArraySubscriptExpr>(this)->getRHS()->getSourceRange();
2070 case CXXOperatorCallExprClass: {
2071 // Warn about operator ==,!=,<,>,<=, and >= even when user-defined operator
2072 // overloads as there is no reasonable way to define these such that they
2073 // have non-trivial, desirable side-effects. See the -Wunused-comparison
2074 // warning: operators == and != are commonly typo'ed, and so warning on them
2075 // provides additional value as well. If this list is updated,
2076 // DiagnoseUnusedComparison should be as well.
2077 const CXXOperatorCallExpr *Op = cast<CXXOperatorCallExpr>(this);
2078 switch (Op->getOperator()) {
2082 case OO_ExclaimEqual:
2085 case OO_GreaterEqual:
2087 if (Op->getCallReturnType(Ctx)->isReferenceType() ||
2088 Op->getCallReturnType(Ctx)->isVoidType())
2091 Loc = Op->getOperatorLoc();
2092 R1 = Op->getSourceRange();
2096 // Fallthrough for generic call handling.
2099 case CXXMemberCallExprClass:
2100 case UserDefinedLiteralClass: {
2101 // If this is a direct call, get the callee.
2102 const CallExpr *CE = cast<CallExpr>(this);
2103 if (const Decl *FD = CE->getCalleeDecl()) {
2104 const FunctionDecl *Func = dyn_cast<FunctionDecl>(FD);
2105 bool HasWarnUnusedResultAttr = Func ? Func->hasUnusedResultAttr()
2106 : FD->hasAttr<WarnUnusedResultAttr>();
2108 // If the callee has attribute pure, const, or warn_unused_result, warn
2109 // about it. void foo() { strlen("bar"); } should warn.
2111 // Note: If new cases are added here, DiagnoseUnusedExprResult should be
2112 // updated to match for QoI.
2113 if (HasWarnUnusedResultAttr ||
2114 FD->hasAttr<PureAttr>() || FD->hasAttr<ConstAttr>()) {
2116 Loc = CE->getCallee()->getLocStart();
2117 R1 = CE->getCallee()->getSourceRange();
2119 if (unsigned NumArgs = CE->getNumArgs())
2120 R2 = SourceRange(CE->getArg(0)->getLocStart(),
2121 CE->getArg(NumArgs-1)->getLocEnd());
2128 // If we don't know precisely what we're looking at, let's not warn.
2129 case UnresolvedLookupExprClass:
2130 case CXXUnresolvedConstructExprClass:
2133 case CXXTemporaryObjectExprClass:
2134 case CXXConstructExprClass: {
2135 if (const CXXRecordDecl *Type = getType()->getAsCXXRecordDecl()) {
2136 if (Type->hasAttr<WarnUnusedAttr>()) {
2138 Loc = getLocStart();
2139 R1 = getSourceRange();
2146 case ObjCMessageExprClass: {
2147 const ObjCMessageExpr *ME = cast<ObjCMessageExpr>(this);
2148 if (Ctx.getLangOpts().ObjCAutoRefCount &&
2149 ME->isInstanceMessage() &&
2150 !ME->getType()->isVoidType() &&
2151 ME->getMethodFamily() == OMF_init) {
2154 R1 = ME->getSourceRange();
2158 if (const ObjCMethodDecl *MD = ME->getMethodDecl())
2159 if (MD->hasAttr<WarnUnusedResultAttr>()) {
2168 case ObjCPropertyRefExprClass:
2171 R1 = getSourceRange();
2174 case PseudoObjectExprClass: {
2175 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
2177 // Only complain about things that have the form of a getter.
2178 if (isa<UnaryOperator>(PO->getSyntacticForm()) ||
2179 isa<BinaryOperator>(PO->getSyntacticForm()))
2184 R1 = getSourceRange();
2188 case StmtExprClass: {
2189 // Statement exprs don't logically have side effects themselves, but are
2190 // sometimes used in macros in ways that give them a type that is unused.
2191 // For example ({ blah; foo(); }) will end up with a type if foo has a type.
2192 // however, if the result of the stmt expr is dead, we don't want to emit a
2194 const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt();
2195 if (!CS->body_empty()) {
2196 if (const Expr *E = dyn_cast<Expr>(CS->body_back()))
2197 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2198 if (const LabelStmt *Label = dyn_cast<LabelStmt>(CS->body_back()))
2199 if (const Expr *E = dyn_cast<Expr>(Label->getSubStmt()))
2200 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2203 if (getType()->isVoidType())
2206 Loc = cast<StmtExpr>(this)->getLParenLoc();
2207 R1 = getSourceRange();
2210 case CXXFunctionalCastExprClass:
2211 case CStyleCastExprClass: {
2212 // Ignore an explicit cast to void unless the operand is a non-trivial
2214 const CastExpr *CE = cast<CastExpr>(this);
2215 if (CE->getCastKind() == CK_ToVoid) {
2216 if (CE->getSubExpr()->isGLValue() &&
2217 CE->getSubExpr()->getType().isVolatileQualified()) {
2218 const DeclRefExpr *DRE =
2219 dyn_cast<DeclRefExpr>(CE->getSubExpr()->IgnoreParens());
2220 if (!(DRE && isa<VarDecl>(DRE->getDecl()) &&
2221 cast<VarDecl>(DRE->getDecl())->hasLocalStorage())) {
2222 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc,
2229 // If this is a cast to a constructor conversion, check the operand.
2230 // Otherwise, the result of the cast is unused.
2231 if (CE->getCastKind() == CK_ConstructorConversion)
2232 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2235 if (const CXXFunctionalCastExpr *CXXCE =
2236 dyn_cast<CXXFunctionalCastExpr>(this)) {
2237 Loc = CXXCE->getLocStart();
2238 R1 = CXXCE->getSubExpr()->getSourceRange();
2240 const CStyleCastExpr *CStyleCE = cast<CStyleCastExpr>(this);
2241 Loc = CStyleCE->getLParenLoc();
2242 R1 = CStyleCE->getSubExpr()->getSourceRange();
2246 case ImplicitCastExprClass: {
2247 const CastExpr *ICE = cast<ImplicitCastExpr>(this);
2249 // lvalue-to-rvalue conversion on a volatile lvalue is a side-effect.
2250 if (ICE->getCastKind() == CK_LValueToRValue &&
2251 ICE->getSubExpr()->getType().isVolatileQualified())
2254 return ICE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2256 case CXXDefaultArgExprClass:
2257 return (cast<CXXDefaultArgExpr>(this)
2258 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2259 case CXXDefaultInitExprClass:
2260 return (cast<CXXDefaultInitExpr>(this)
2261 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2263 case CXXNewExprClass:
2264 // FIXME: In theory, there might be new expressions that don't have side
2265 // effects (e.g. a placement new with an uninitialized POD).
2266 case CXXDeleteExprClass:
2268 case MaterializeTemporaryExprClass:
2269 return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
2270 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2271 case CXXBindTemporaryExprClass:
2272 return cast<CXXBindTemporaryExpr>(this)->getSubExpr()
2273 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2274 case ExprWithCleanupsClass:
2275 return cast<ExprWithCleanups>(this)->getSubExpr()
2276 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2280 /// isOBJCGCCandidate - Check if an expression is objc gc'able.
2281 /// returns true, if it is; false otherwise.
2282 bool Expr::isOBJCGCCandidate(ASTContext &Ctx) const {
2283 const Expr *E = IgnoreParens();
2284 switch (E->getStmtClass()) {
2287 case ObjCIvarRefExprClass:
2289 case Expr::UnaryOperatorClass:
2290 return cast<UnaryOperator>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2291 case ImplicitCastExprClass:
2292 return cast<ImplicitCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2293 case MaterializeTemporaryExprClass:
2294 return cast<MaterializeTemporaryExpr>(E)->GetTemporaryExpr()
2295 ->isOBJCGCCandidate(Ctx);
2296 case CStyleCastExprClass:
2297 return cast<CStyleCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2298 case DeclRefExprClass: {
2299 const Decl *D = cast<DeclRefExpr>(E)->getDecl();
2301 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
2302 if (VD->hasGlobalStorage())
2304 QualType T = VD->getType();
2305 // dereferencing to a pointer is always a gc'able candidate,
2306 // unless it is __weak.
2307 return T->isPointerType() &&
2308 (Ctx.getObjCGCAttrKind(T) != Qualifiers::Weak);
2312 case MemberExprClass: {
2313 const MemberExpr *M = cast<MemberExpr>(E);
2314 return M->getBase()->isOBJCGCCandidate(Ctx);
2316 case ArraySubscriptExprClass:
2317 return cast<ArraySubscriptExpr>(E)->getBase()->isOBJCGCCandidate(Ctx);
2321 bool Expr::isBoundMemberFunction(ASTContext &Ctx) const {
2322 if (isTypeDependent())
2324 return ClassifyLValue(Ctx) == Expr::LV_MemberFunction;
2327 QualType Expr::findBoundMemberType(const Expr *expr) {
2328 assert(expr->hasPlaceholderType(BuiltinType::BoundMember));
2330 // Bound member expressions are always one of these possibilities:
2331 // x->m x.m x->*y x.*y
2332 // (possibly parenthesized)
2334 expr = expr->IgnoreParens();
2335 if (const MemberExpr *mem = dyn_cast<MemberExpr>(expr)) {
2336 assert(isa<CXXMethodDecl>(mem->getMemberDecl()));
2337 return mem->getMemberDecl()->getType();
2340 if (const BinaryOperator *op = dyn_cast<BinaryOperator>(expr)) {
2341 QualType type = op->getRHS()->getType()->castAs<MemberPointerType>()
2343 assert(type->isFunctionType());
2347 assert(isa<UnresolvedMemberExpr>(expr) || isa<CXXPseudoDestructorExpr>(expr));
2351 Expr* Expr::IgnoreParens() {
2354 if (ParenExpr* P = dyn_cast<ParenExpr>(E)) {
2355 E = P->getSubExpr();
2358 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) {
2359 if (P->getOpcode() == UO_Extension) {
2360 E = P->getSubExpr();
2364 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) {
2365 if (!P->isResultDependent()) {
2366 E = P->getResultExpr();
2370 if (ChooseExpr* P = dyn_cast<ChooseExpr>(E)) {
2371 if (!P->isConditionDependent()) {
2372 E = P->getChosenSubExpr();
2380 /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr
2381 /// or CastExprs or ImplicitCastExprs, returning their operand.
2382 Expr *Expr::IgnoreParenCasts() {
2385 E = E->IgnoreParens();
2386 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2387 E = P->getSubExpr();
2390 if (MaterializeTemporaryExpr *Materialize
2391 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2392 E = Materialize->GetTemporaryExpr();
2395 if (SubstNonTypeTemplateParmExpr *NTTP
2396 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2397 E = NTTP->getReplacement();
2404 Expr *Expr::IgnoreCasts() {
2407 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2408 E = P->getSubExpr();
2411 if (MaterializeTemporaryExpr *Materialize
2412 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2413 E = Materialize->GetTemporaryExpr();
2416 if (SubstNonTypeTemplateParmExpr *NTTP
2417 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2418 E = NTTP->getReplacement();
2425 /// IgnoreParenLValueCasts - Ignore parentheses and lvalue-to-rvalue
2426 /// casts. This is intended purely as a temporary workaround for code
2427 /// that hasn't yet been rewritten to do the right thing about those
2428 /// casts, and may disappear along with the last internal use.
2429 Expr *Expr::IgnoreParenLValueCasts() {
2432 E = E->IgnoreParens();
2433 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2434 if (P->getCastKind() == CK_LValueToRValue) {
2435 E = P->getSubExpr();
2438 } else if (MaterializeTemporaryExpr *Materialize
2439 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2440 E = Materialize->GetTemporaryExpr();
2442 } else if (SubstNonTypeTemplateParmExpr *NTTP
2443 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2444 E = NTTP->getReplacement();
2452 Expr *Expr::ignoreParenBaseCasts() {
2455 E = E->IgnoreParens();
2456 if (CastExpr *CE = dyn_cast<CastExpr>(E)) {
2457 if (CE->getCastKind() == CK_DerivedToBase ||
2458 CE->getCastKind() == CK_UncheckedDerivedToBase ||
2459 CE->getCastKind() == CK_NoOp) {
2460 E = CE->getSubExpr();
2469 Expr *Expr::IgnoreParenImpCasts() {
2472 E = E->IgnoreParens();
2473 if (ImplicitCastExpr *P = dyn_cast<ImplicitCastExpr>(E)) {
2474 E = P->getSubExpr();
2477 if (MaterializeTemporaryExpr *Materialize
2478 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2479 E = Materialize->GetTemporaryExpr();
2482 if (SubstNonTypeTemplateParmExpr *NTTP
2483 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2484 E = NTTP->getReplacement();
2491 Expr *Expr::IgnoreConversionOperator() {
2492 if (CXXMemberCallExpr *MCE = dyn_cast<CXXMemberCallExpr>(this)) {
2493 if (MCE->getMethodDecl() && isa<CXXConversionDecl>(MCE->getMethodDecl()))
2494 return MCE->getImplicitObjectArgument();
2499 /// IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the
2500 /// value (including ptr->int casts of the same size). Strip off any
2501 /// ParenExpr or CastExprs, returning their operand.
2502 Expr *Expr::IgnoreParenNoopCasts(ASTContext &Ctx) {
2505 E = E->IgnoreParens();
2507 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2508 // We ignore integer <-> casts that are of the same width, ptr<->ptr and
2509 // ptr<->int casts of the same width. We also ignore all identity casts.
2510 Expr *SE = P->getSubExpr();
2512 if (Ctx.hasSameUnqualifiedType(E->getType(), SE->getType())) {
2517 if ((E->getType()->isPointerType() ||
2518 E->getType()->isIntegralType(Ctx)) &&
2519 (SE->getType()->isPointerType() ||
2520 SE->getType()->isIntegralType(Ctx)) &&
2521 Ctx.getTypeSize(E->getType()) == Ctx.getTypeSize(SE->getType())) {
2527 if (SubstNonTypeTemplateParmExpr *NTTP
2528 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2529 E = NTTP->getReplacement();
2537 bool Expr::isDefaultArgument() const {
2538 const Expr *E = this;
2539 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2540 E = M->GetTemporaryExpr();
2542 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E))
2543 E = ICE->getSubExprAsWritten();
2545 return isa<CXXDefaultArgExpr>(E);
2548 /// \brief Skip over any no-op casts and any temporary-binding
2550 static const Expr *skipTemporaryBindingsNoOpCastsAndParens(const Expr *E) {
2551 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2552 E = M->GetTemporaryExpr();
2554 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2555 if (ICE->getCastKind() == CK_NoOp)
2556 E = ICE->getSubExpr();
2561 while (const CXXBindTemporaryExpr *BE = dyn_cast<CXXBindTemporaryExpr>(E))
2562 E = BE->getSubExpr();
2564 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2565 if (ICE->getCastKind() == CK_NoOp)
2566 E = ICE->getSubExpr();
2571 return E->IgnoreParens();
2574 /// isTemporaryObject - Determines if this expression produces a
2575 /// temporary of the given class type.
2576 bool Expr::isTemporaryObject(ASTContext &C, const CXXRecordDecl *TempTy) const {
2577 if (!C.hasSameUnqualifiedType(getType(), C.getTypeDeclType(TempTy)))
2580 const Expr *E = skipTemporaryBindingsNoOpCastsAndParens(this);
2582 // Temporaries are by definition pr-values of class type.
2583 if (!E->Classify(C).isPRValue()) {
2584 // In this context, property reference is a message call and is pr-value.
2585 if (!isa<ObjCPropertyRefExpr>(E))
2589 // Black-list a few cases which yield pr-values of class type that don't
2590 // refer to temporaries of that type:
2592 // - implicit derived-to-base conversions
2593 if (isa<ImplicitCastExpr>(E)) {
2594 switch (cast<ImplicitCastExpr>(E)->getCastKind()) {
2595 case CK_DerivedToBase:
2596 case CK_UncheckedDerivedToBase:
2603 // - member expressions (all)
2604 if (isa<MemberExpr>(E))
2607 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E))
2608 if (BO->isPtrMemOp())
2611 // - opaque values (all)
2612 if (isa<OpaqueValueExpr>(E))
2618 bool Expr::isImplicitCXXThis() const {
2619 const Expr *E = this;
2621 // Strip away parentheses and casts we don't care about.
2623 if (const ParenExpr *Paren = dyn_cast<ParenExpr>(E)) {
2624 E = Paren->getSubExpr();
2628 if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2629 if (ICE->getCastKind() == CK_NoOp ||
2630 ICE->getCastKind() == CK_LValueToRValue ||
2631 ICE->getCastKind() == CK_DerivedToBase ||
2632 ICE->getCastKind() == CK_UncheckedDerivedToBase) {
2633 E = ICE->getSubExpr();
2638 if (const UnaryOperator* UnOp = dyn_cast<UnaryOperator>(E)) {
2639 if (UnOp->getOpcode() == UO_Extension) {
2640 E = UnOp->getSubExpr();
2645 if (const MaterializeTemporaryExpr *M
2646 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2647 E = M->GetTemporaryExpr();
2654 if (const CXXThisExpr *This = dyn_cast<CXXThisExpr>(E))
2655 return This->isImplicit();
2660 /// hasAnyTypeDependentArguments - Determines if any of the expressions
2661 /// in Exprs is type-dependent.
2662 bool Expr::hasAnyTypeDependentArguments(ArrayRef<Expr *> Exprs) {
2663 for (unsigned I = 0; I < Exprs.size(); ++I)
2664 if (Exprs[I]->isTypeDependent())
2670 bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef,
2671 const Expr **Culprit) const {
2672 // This function is attempting whether an expression is an initializer
2673 // which can be evaluated at compile-time. It very closely parallels
2674 // ConstExprEmitter in CGExprConstant.cpp; if they don't match, it
2675 // will lead to unexpected results. Like ConstExprEmitter, it falls back
2676 // to isEvaluatable most of the time.
2678 // If we ever capture reference-binding directly in the AST, we can
2679 // kill the second parameter.
2683 if (EvaluateAsLValue(Result, Ctx) && !Result.HasSideEffects)
2690 switch (getStmtClass()) {
2692 case StringLiteralClass:
2693 case ObjCEncodeExprClass:
2695 case CXXTemporaryObjectExprClass:
2696 case CXXConstructExprClass: {
2697 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
2699 if (CE->getConstructor()->isTrivial() &&
2700 CE->getConstructor()->getParent()->hasTrivialDestructor()) {
2701 // Trivial default constructor
2702 if (!CE->getNumArgs()) return true;
2704 // Trivial copy constructor
2705 assert(CE->getNumArgs() == 1 && "trivial ctor with > 1 argument");
2706 return CE->getArg(0)->isConstantInitializer(Ctx, false, Culprit);
2711 case CompoundLiteralExprClass: {
2712 // This handles gcc's extension that allows global initializers like
2713 // "struct x {int x;} x = (struct x) {};".
2714 // FIXME: This accepts other cases it shouldn't!
2715 const Expr *Exp = cast<CompoundLiteralExpr>(this)->getInitializer();
2716 return Exp->isConstantInitializer(Ctx, false, Culprit);
2718 case DesignatedInitUpdateExprClass: {
2719 const DesignatedInitUpdateExpr *DIUE = cast<DesignatedInitUpdateExpr>(this);
2720 return DIUE->getBase()->isConstantInitializer(Ctx, false, Culprit) &&
2721 DIUE->getUpdater()->isConstantInitializer(Ctx, false, Culprit);
2723 case InitListExprClass: {
2724 const InitListExpr *ILE = cast<InitListExpr>(this);
2725 if (ILE->getType()->isArrayType()) {
2726 unsigned numInits = ILE->getNumInits();
2727 for (unsigned i = 0; i < numInits; i++) {
2728 if (!ILE->getInit(i)->isConstantInitializer(Ctx, false, Culprit))
2734 if (ILE->getType()->isRecordType()) {
2735 unsigned ElementNo = 0;
2736 RecordDecl *RD = ILE->getType()->getAs<RecordType>()->getDecl();
2737 for (const auto *Field : RD->fields()) {
2738 // If this is a union, skip all the fields that aren't being initialized.
2739 if (RD->isUnion() && ILE->getInitializedFieldInUnion() != Field)
2742 // Don't emit anonymous bitfields, they just affect layout.
2743 if (Field->isUnnamedBitfield())
2746 if (ElementNo < ILE->getNumInits()) {
2747 const Expr *Elt = ILE->getInit(ElementNo++);
2748 if (Field->isBitField()) {
2749 // Bitfields have to evaluate to an integer.
2750 llvm::APSInt ResultTmp;
2751 if (!Elt->EvaluateAsInt(ResultTmp, Ctx)) {
2757 bool RefType = Field->getType()->isReferenceType();
2758 if (!Elt->isConstantInitializer(Ctx, RefType, Culprit))
2768 case ImplicitValueInitExprClass:
2769 case NoInitExprClass:
2771 case ParenExprClass:
2772 return cast<ParenExpr>(this)->getSubExpr()
2773 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2774 case GenericSelectionExprClass:
2775 return cast<GenericSelectionExpr>(this)->getResultExpr()
2776 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2777 case ChooseExprClass:
2778 if (cast<ChooseExpr>(this)->isConditionDependent()) {
2783 return cast<ChooseExpr>(this)->getChosenSubExpr()
2784 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2785 case UnaryOperatorClass: {
2786 const UnaryOperator* Exp = cast<UnaryOperator>(this);
2787 if (Exp->getOpcode() == UO_Extension)
2788 return Exp->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
2791 case CXXFunctionalCastExprClass:
2792 case CXXStaticCastExprClass:
2793 case ImplicitCastExprClass:
2794 case CStyleCastExprClass:
2795 case ObjCBridgedCastExprClass:
2796 case CXXDynamicCastExprClass:
2797 case CXXReinterpretCastExprClass:
2798 case CXXConstCastExprClass: {
2799 const CastExpr *CE = cast<CastExpr>(this);
2801 // Handle misc casts we want to ignore.
2802 if (CE->getCastKind() == CK_NoOp ||
2803 CE->getCastKind() == CK_LValueToRValue ||
2804 CE->getCastKind() == CK_ToUnion ||
2805 CE->getCastKind() == CK_ConstructorConversion ||
2806 CE->getCastKind() == CK_NonAtomicToAtomic ||
2807 CE->getCastKind() == CK_AtomicToNonAtomic ||
2808 CE->getCastKind() == CK_IntToOCLSampler)
2809 return CE->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
2813 case MaterializeTemporaryExprClass:
2814 return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
2815 ->isConstantInitializer(Ctx, false, Culprit);
2817 case SubstNonTypeTemplateParmExprClass:
2818 return cast<SubstNonTypeTemplateParmExpr>(this)->getReplacement()
2819 ->isConstantInitializer(Ctx, false, Culprit);
2820 case CXXDefaultArgExprClass:
2821 return cast<CXXDefaultArgExpr>(this)->getExpr()
2822 ->isConstantInitializer(Ctx, false, Culprit);
2823 case CXXDefaultInitExprClass:
2824 return cast<CXXDefaultInitExpr>(this)->getExpr()
2825 ->isConstantInitializer(Ctx, false, Culprit);
2827 // Allow certain forms of UB in constant initializers: signed integer
2828 // overflow and floating-point division by zero. We'll give a warning on
2829 // these, but they're common enough that we have to accept them.
2830 if (isEvaluatable(Ctx, SE_AllowUndefinedBehavior))
2838 /// \brief Look for any side effects within a Stmt.
2839 class SideEffectFinder : public ConstEvaluatedExprVisitor<SideEffectFinder> {
2840 typedef ConstEvaluatedExprVisitor<SideEffectFinder> Inherited;
2841 const bool IncludePossibleEffects;
2842 bool HasSideEffects;
2845 explicit SideEffectFinder(const ASTContext &Context, bool IncludePossible)
2846 : Inherited(Context),
2847 IncludePossibleEffects(IncludePossible), HasSideEffects(false) { }
2849 bool hasSideEffects() const { return HasSideEffects; }
2851 void VisitExpr(const Expr *E) {
2852 if (!HasSideEffects &&
2853 E->HasSideEffects(Context, IncludePossibleEffects))
2854 HasSideEffects = true;
2859 bool Expr::HasSideEffects(const ASTContext &Ctx,
2860 bool IncludePossibleEffects) const {
2861 // In circumstances where we care about definite side effects instead of
2862 // potential side effects, we want to ignore expressions that are part of a
2863 // macro expansion as a potential side effect.
2864 if (!IncludePossibleEffects && getExprLoc().isMacroID())
2867 if (isInstantiationDependent())
2868 return IncludePossibleEffects;
2870 switch (getStmtClass()) {
2872 #define ABSTRACT_STMT(Type)
2873 #define STMT(Type, Base) case Type##Class:
2874 #define EXPR(Type, Base)
2875 #include "clang/AST/StmtNodes.inc"
2876 llvm_unreachable("unexpected Expr kind");
2878 case DependentScopeDeclRefExprClass:
2879 case CXXUnresolvedConstructExprClass:
2880 case CXXDependentScopeMemberExprClass:
2881 case UnresolvedLookupExprClass:
2882 case UnresolvedMemberExprClass:
2883 case PackExpansionExprClass:
2884 case SubstNonTypeTemplateParmPackExprClass:
2885 case FunctionParmPackExprClass:
2887 case CXXFoldExprClass:
2888 llvm_unreachable("shouldn't see dependent / unresolved nodes here");
2890 case DeclRefExprClass:
2891 case ObjCIvarRefExprClass:
2892 case PredefinedExprClass:
2893 case IntegerLiteralClass:
2894 case FloatingLiteralClass:
2895 case ImaginaryLiteralClass:
2896 case StringLiteralClass:
2897 case CharacterLiteralClass:
2898 case OffsetOfExprClass:
2899 case ImplicitValueInitExprClass:
2900 case UnaryExprOrTypeTraitExprClass:
2901 case AddrLabelExprClass:
2902 case GNUNullExprClass:
2903 case ArrayInitIndexExprClass:
2904 case NoInitExprClass:
2905 case CXXBoolLiteralExprClass:
2906 case CXXNullPtrLiteralExprClass:
2907 case CXXThisExprClass:
2908 case CXXScalarValueInitExprClass:
2909 case TypeTraitExprClass:
2910 case ArrayTypeTraitExprClass:
2911 case ExpressionTraitExprClass:
2912 case CXXNoexceptExprClass:
2913 case SizeOfPackExprClass:
2914 case ObjCStringLiteralClass:
2915 case ObjCEncodeExprClass:
2916 case ObjCBoolLiteralExprClass:
2917 case ObjCAvailabilityCheckExprClass:
2918 case CXXUuidofExprClass:
2919 case OpaqueValueExprClass:
2920 // These never have a side-effect.
2924 case CXXOperatorCallExprClass:
2925 case CXXMemberCallExprClass:
2926 case CUDAKernelCallExprClass:
2927 case UserDefinedLiteralClass: {
2928 // We don't know a call definitely has side effects, except for calls
2929 // to pure/const functions that definitely don't.
2930 // If the call itself is considered side-effect free, check the operands.
2931 const Decl *FD = cast<CallExpr>(this)->getCalleeDecl();
2932 bool IsPure = FD && (FD->hasAttr<ConstAttr>() || FD->hasAttr<PureAttr>());
2933 if (IsPure || !IncludePossibleEffects)
2938 case BlockExprClass:
2939 case CXXBindTemporaryExprClass:
2940 if (!IncludePossibleEffects)
2944 case MSPropertyRefExprClass:
2945 case MSPropertySubscriptExprClass:
2946 case CompoundAssignOperatorClass:
2947 case VAArgExprClass:
2948 case AtomicExprClass:
2949 case CXXThrowExprClass:
2950 case CXXNewExprClass:
2951 case CXXDeleteExprClass:
2952 case CoawaitExprClass:
2953 case CoyieldExprClass:
2954 // These always have a side-effect.
2957 case StmtExprClass: {
2958 // StmtExprs have a side-effect if any substatement does.
2959 SideEffectFinder Finder(Ctx, IncludePossibleEffects);
2960 Finder.Visit(cast<StmtExpr>(this)->getSubStmt());
2961 return Finder.hasSideEffects();
2964 case ExprWithCleanupsClass:
2965 if (IncludePossibleEffects)
2966 if (cast<ExprWithCleanups>(this)->cleanupsHaveSideEffects())
2970 case ParenExprClass:
2971 case ArraySubscriptExprClass:
2972 case OMPArraySectionExprClass:
2973 case MemberExprClass:
2974 case ConditionalOperatorClass:
2975 case BinaryConditionalOperatorClass:
2976 case CompoundLiteralExprClass:
2977 case ExtVectorElementExprClass:
2978 case DesignatedInitExprClass:
2979 case DesignatedInitUpdateExprClass:
2980 case ArrayInitLoopExprClass:
2981 case ParenListExprClass:
2982 case CXXPseudoDestructorExprClass:
2983 case CXXStdInitializerListExprClass:
2984 case SubstNonTypeTemplateParmExprClass:
2985 case MaterializeTemporaryExprClass:
2986 case ShuffleVectorExprClass:
2987 case ConvertVectorExprClass:
2988 case AsTypeExprClass:
2989 // These have a side-effect if any subexpression does.
2992 case UnaryOperatorClass:
2993 if (cast<UnaryOperator>(this)->isIncrementDecrementOp())
2997 case BinaryOperatorClass:
2998 if (cast<BinaryOperator>(this)->isAssignmentOp())
3002 case InitListExprClass:
3003 // FIXME: The children for an InitListExpr doesn't include the array filler.
3004 if (const Expr *E = cast<InitListExpr>(this)->getArrayFiller())
3005 if (E->HasSideEffects(Ctx, IncludePossibleEffects))
3009 case GenericSelectionExprClass:
3010 return cast<GenericSelectionExpr>(this)->getResultExpr()->
3011 HasSideEffects(Ctx, IncludePossibleEffects);
3013 case ChooseExprClass:
3014 return cast<ChooseExpr>(this)->getChosenSubExpr()->HasSideEffects(
3015 Ctx, IncludePossibleEffects);
3017 case CXXDefaultArgExprClass:
3018 return cast<CXXDefaultArgExpr>(this)->getExpr()->HasSideEffects(
3019 Ctx, IncludePossibleEffects);
3021 case CXXDefaultInitExprClass: {
3022 const FieldDecl *FD = cast<CXXDefaultInitExpr>(this)->getField();
3023 if (const Expr *E = FD->getInClassInitializer())
3024 return E->HasSideEffects(Ctx, IncludePossibleEffects);
3025 // If we've not yet parsed the initializer, assume it has side-effects.
3029 case CXXDynamicCastExprClass: {
3030 // A dynamic_cast expression has side-effects if it can throw.
3031 const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(this);
3032 if (DCE->getTypeAsWritten()->isReferenceType() &&
3033 DCE->getCastKind() == CK_Dynamic)
3036 case ImplicitCastExprClass:
3037 case CStyleCastExprClass:
3038 case CXXStaticCastExprClass:
3039 case CXXReinterpretCastExprClass:
3040 case CXXConstCastExprClass:
3041 case CXXFunctionalCastExprClass: {
3042 // While volatile reads are side-effecting in both C and C++, we treat them
3043 // as having possible (not definite) side-effects. This allows idiomatic
3044 // code to behave without warning, such as sizeof(*v) for a volatile-
3045 // qualified pointer.
3046 if (!IncludePossibleEffects)
3049 const CastExpr *CE = cast<CastExpr>(this);
3050 if (CE->getCastKind() == CK_LValueToRValue &&
3051 CE->getSubExpr()->getType().isVolatileQualified())
3056 case CXXTypeidExprClass:
3057 // typeid might throw if its subexpression is potentially-evaluated, so has
3058 // side-effects in that case whether or not its subexpression does.
3059 return cast<CXXTypeidExpr>(this)->isPotentiallyEvaluated();
3061 case CXXConstructExprClass:
3062 case CXXTemporaryObjectExprClass: {
3063 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
3064 if (!CE->getConstructor()->isTrivial() && IncludePossibleEffects)
3066 // A trivial constructor does not add any side-effects of its own. Just look
3067 // at its arguments.
3071 case CXXInheritedCtorInitExprClass: {
3072 const auto *ICIE = cast<CXXInheritedCtorInitExpr>(this);
3073 if (!ICIE->getConstructor()->isTrivial() && IncludePossibleEffects)
3078 case LambdaExprClass: {
3079 const LambdaExpr *LE = cast<LambdaExpr>(this);
3080 for (LambdaExpr::capture_iterator I = LE->capture_begin(),
3081 E = LE->capture_end(); I != E; ++I)
3082 if (I->getCaptureKind() == LCK_ByCopy)
3083 // FIXME: Only has a side-effect if the variable is volatile or if
3084 // the copy would invoke a non-trivial copy constructor.
3089 case PseudoObjectExprClass: {
3090 // Only look for side-effects in the semantic form, and look past
3091 // OpaqueValueExpr bindings in that form.
3092 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
3093 for (PseudoObjectExpr::const_semantics_iterator I = PO->semantics_begin(),
3094 E = PO->semantics_end();
3096 const Expr *Subexpr = *I;
3097 if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(Subexpr))
3098 Subexpr = OVE->getSourceExpr();
3099 if (Subexpr->HasSideEffects(Ctx, IncludePossibleEffects))
3105 case ObjCBoxedExprClass:
3106 case ObjCArrayLiteralClass:
3107 case ObjCDictionaryLiteralClass:
3108 case ObjCSelectorExprClass:
3109 case ObjCProtocolExprClass:
3110 case ObjCIsaExprClass:
3111 case ObjCIndirectCopyRestoreExprClass:
3112 case ObjCSubscriptRefExprClass:
3113 case ObjCBridgedCastExprClass:
3114 case ObjCMessageExprClass:
3115 case ObjCPropertyRefExprClass:
3116 // FIXME: Classify these cases better.
3117 if (IncludePossibleEffects)
3122 // Recurse to children.
3123 for (const Stmt *SubStmt : children())
3125 cast<Expr>(SubStmt)->HasSideEffects(Ctx, IncludePossibleEffects))
3132 /// \brief Look for a call to a non-trivial function within an expression.
3133 class NonTrivialCallFinder : public ConstEvaluatedExprVisitor<NonTrivialCallFinder>
3135 typedef ConstEvaluatedExprVisitor<NonTrivialCallFinder> Inherited;
3140 explicit NonTrivialCallFinder(const ASTContext &Context)
3141 : Inherited(Context), NonTrivial(false) { }
3143 bool hasNonTrivialCall() const { return NonTrivial; }
3145 void VisitCallExpr(const CallExpr *E) {
3146 if (const CXXMethodDecl *Method
3147 = dyn_cast_or_null<const CXXMethodDecl>(E->getCalleeDecl())) {
3148 if (Method->isTrivial()) {
3149 // Recurse to children of the call.
3150 Inherited::VisitStmt(E);
3158 void VisitCXXConstructExpr(const CXXConstructExpr *E) {
3159 if (E->getConstructor()->isTrivial()) {
3160 // Recurse to children of the call.
3161 Inherited::VisitStmt(E);
3168 void VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *E) {
3169 if (E->getTemporary()->getDestructor()->isTrivial()) {
3170 Inherited::VisitStmt(E);
3179 bool Expr::hasNonTrivialCall(const ASTContext &Ctx) const {
3180 NonTrivialCallFinder Finder(Ctx);
3182 return Finder.hasNonTrivialCall();
3185 /// isNullPointerConstant - C99 6.3.2.3p3 - Return whether this is a null
3186 /// pointer constant or not, as well as the specific kind of constant detected.
3187 /// Null pointer constants can be integer constant expressions with the
3188 /// value zero, casts of zero to void*, nullptr (C++0X), or __null
3189 /// (a GNU extension).
3190 Expr::NullPointerConstantKind
3191 Expr::isNullPointerConstant(ASTContext &Ctx,
3192 NullPointerConstantValueDependence NPC) const {
3193 if (isValueDependent() &&
3194 (!Ctx.getLangOpts().CPlusPlus11 || Ctx.getLangOpts().MSVCCompat)) {
3196 case NPC_NeverValueDependent:
3197 llvm_unreachable("Unexpected value dependent expression!");
3198 case NPC_ValueDependentIsNull:
3199 if (isTypeDependent() || getType()->isIntegralType(Ctx))
3200 return NPCK_ZeroExpression;
3202 return NPCK_NotNull;
3204 case NPC_ValueDependentIsNotNull:
3205 return NPCK_NotNull;
3209 // Strip off a cast to void*, if it exists. Except in C++.
3210 if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) {
3211 if (!Ctx.getLangOpts().CPlusPlus) {
3212 // Check that it is a cast to void*.
3213 if (const PointerType *PT = CE->getType()->getAs<PointerType>()) {
3214 QualType Pointee = PT->getPointeeType();
3215 Qualifiers Q = Pointee.getQualifiers();
3216 // In OpenCL v2.0 generic address space acts as a placeholder
3217 // and should be ignored.
3218 bool IsASValid = true;
3219 if (Ctx.getLangOpts().OpenCLVersion >= 200) {
3220 if (Pointee.getAddressSpace() == LangAS::opencl_generic)
3221 Q.removeAddressSpace();
3226 if (IsASValid && !Q.hasQualifiers() &&
3227 Pointee->isVoidType() && // to void*
3228 CE->getSubExpr()->getType()->isIntegerType()) // from int.
3229 return CE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3232 } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) {
3233 // Ignore the ImplicitCastExpr type entirely.
3234 return ICE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3235 } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) {
3236 // Accept ((void*)0) as a null pointer constant, as many other
3237 // implementations do.
3238 return PE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3239 } else if (const GenericSelectionExpr *GE =
3240 dyn_cast<GenericSelectionExpr>(this)) {
3241 if (GE->isResultDependent())
3242 return NPCK_NotNull;
3243 return GE->getResultExpr()->isNullPointerConstant(Ctx, NPC);
3244 } else if (const ChooseExpr *CE = dyn_cast<ChooseExpr>(this)) {
3245 if (CE->isConditionDependent())
3246 return NPCK_NotNull;
3247 return CE->getChosenSubExpr()->isNullPointerConstant(Ctx, NPC);
3248 } else if (const CXXDefaultArgExpr *DefaultArg
3249 = dyn_cast<CXXDefaultArgExpr>(this)) {
3250 // See through default argument expressions.
3251 return DefaultArg->getExpr()->isNullPointerConstant(Ctx, NPC);
3252 } else if (const CXXDefaultInitExpr *DefaultInit
3253 = dyn_cast<CXXDefaultInitExpr>(this)) {
3254 // See through default initializer expressions.
3255 return DefaultInit->getExpr()->isNullPointerConstant(Ctx, NPC);
3256 } else if (isa<GNUNullExpr>(this)) {
3257 // The GNU __null extension is always a null pointer constant.
3258 return NPCK_GNUNull;
3259 } else if (const MaterializeTemporaryExpr *M
3260 = dyn_cast<MaterializeTemporaryExpr>(this)) {
3261 return M->GetTemporaryExpr()->isNullPointerConstant(Ctx, NPC);
3262 } else if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(this)) {
3263 if (const Expr *Source = OVE->getSourceExpr())
3264 return Source->isNullPointerConstant(Ctx, NPC);
3267 // C++11 nullptr_t is always a null pointer constant.
3268 if (getType()->isNullPtrType())
3269 return NPCK_CXX11_nullptr;
3271 if (const RecordType *UT = getType()->getAsUnionType())
3272 if (!Ctx.getLangOpts().CPlusPlus11 &&
3273 UT && UT->getDecl()->hasAttr<TransparentUnionAttr>())
3274 if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(this)){
3275 const Expr *InitExpr = CLE->getInitializer();
3276 if (const InitListExpr *ILE = dyn_cast<InitListExpr>(InitExpr))
3277 return ILE->getInit(0)->isNullPointerConstant(Ctx, NPC);
3279 // This expression must be an integer type.
3280 if (!getType()->isIntegerType() ||
3281 (Ctx.getLangOpts().CPlusPlus && getType()->isEnumeralType()))
3282 return NPCK_NotNull;
3284 if (Ctx.getLangOpts().CPlusPlus11) {
3285 // C++11 [conv.ptr]p1: A null pointer constant is an integer literal with
3286 // value zero or a prvalue of type std::nullptr_t.
3287 // Microsoft mode permits C++98 rules reflecting MSVC behavior.
3288 const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(this);
3289 if (Lit && !Lit->getValue())
3290 return NPCK_ZeroLiteral;
3291 else if (!Ctx.getLangOpts().MSVCCompat || !isCXX98IntegralConstantExpr(Ctx))
3292 return NPCK_NotNull;
3294 // If we have an integer constant expression, we need to *evaluate* it and
3295 // test for the value 0.
3296 if (!isIntegerConstantExpr(Ctx))
3297 return NPCK_NotNull;
3300 if (EvaluateKnownConstInt(Ctx) != 0)
3301 return NPCK_NotNull;
3303 if (isa<IntegerLiteral>(this))
3304 return NPCK_ZeroLiteral;
3305 return NPCK_ZeroExpression;
3308 /// \brief If this expression is an l-value for an Objective C
3309 /// property, find the underlying property reference expression.
3310 const ObjCPropertyRefExpr *Expr::getObjCProperty() const {
3311 const Expr *E = this;
3313 assert((E->getValueKind() == VK_LValue &&
3314 E->getObjectKind() == OK_ObjCProperty) &&
3315 "expression is not a property reference");
3316 E = E->IgnoreParenCasts();
3317 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
3318 if (BO->getOpcode() == BO_Comma) {
3327 return cast<ObjCPropertyRefExpr>(E);
3330 bool Expr::isObjCSelfExpr() const {
3331 const Expr *E = IgnoreParenImpCasts();
3333 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E);
3337 const ImplicitParamDecl *Param = dyn_cast<ImplicitParamDecl>(DRE->getDecl());
3341 const ObjCMethodDecl *M = dyn_cast<ObjCMethodDecl>(Param->getDeclContext());
3345 return M->getSelfDecl() == Param;
3348 FieldDecl *Expr::getSourceBitField() {
3349 Expr *E = this->IgnoreParens();
3351 while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3352 if (ICE->getCastKind() == CK_LValueToRValue ||
3353 (ICE->getValueKind() != VK_RValue && ICE->getCastKind() == CK_NoOp))
3354 E = ICE->getSubExpr()->IgnoreParens();
3359 if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E))
3360 if (FieldDecl *Field = dyn_cast<FieldDecl>(MemRef->getMemberDecl()))
3361 if (Field->isBitField())
3364 if (ObjCIvarRefExpr *IvarRef = dyn_cast<ObjCIvarRefExpr>(E))
3365 if (FieldDecl *Ivar = dyn_cast<FieldDecl>(IvarRef->getDecl()))
3366 if (Ivar->isBitField())
3369 if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E)) {
3370 if (FieldDecl *Field = dyn_cast<FieldDecl>(DeclRef->getDecl()))
3371 if (Field->isBitField())
3374 if (BindingDecl *BD = dyn_cast<BindingDecl>(DeclRef->getDecl()))
3375 if (Expr *E = BD->getBinding())
3376 return E->getSourceBitField();
3379 if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(E)) {
3380 if (BinOp->isAssignmentOp() && BinOp->getLHS())
3381 return BinOp->getLHS()->getSourceBitField();
3383 if (BinOp->getOpcode() == BO_Comma && BinOp->getRHS())
3384 return BinOp->getRHS()->getSourceBitField();
3387 if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(E))
3388 if (UnOp->isPrefix() && UnOp->isIncrementDecrementOp())
3389 return UnOp->getSubExpr()->getSourceBitField();
3394 bool Expr::refersToVectorElement() const {
3395 // FIXME: Why do we not just look at the ObjectKind here?
3396 const Expr *E = this->IgnoreParens();
3398 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3399 if (ICE->getValueKind() != VK_RValue &&
3400 ICE->getCastKind() == CK_NoOp)
3401 E = ICE->getSubExpr()->IgnoreParens();
3406 if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E))
3407 return ASE->getBase()->getType()->isVectorType();
3409 if (isa<ExtVectorElementExpr>(E))
3412 if (auto *DRE = dyn_cast<DeclRefExpr>(E))
3413 if (auto *BD = dyn_cast<BindingDecl>(DRE->getDecl()))
3414 if (auto *E = BD->getBinding())
3415 return E->refersToVectorElement();
3420 bool Expr::refersToGlobalRegisterVar() const {
3421 const Expr *E = this->IgnoreParenImpCasts();
3423 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
3424 if (const auto *VD = dyn_cast<VarDecl>(DRE->getDecl()))
3425 if (VD->getStorageClass() == SC_Register &&
3426 VD->hasAttr<AsmLabelAttr>() && !VD->isLocalVarDecl())
3432 /// isArrow - Return true if the base expression is a pointer to vector,
3433 /// return false if the base expression is a vector.
3434 bool ExtVectorElementExpr::isArrow() const {
3435 return getBase()->getType()->isPointerType();
3438 unsigned ExtVectorElementExpr::getNumElements() const {
3439 if (const VectorType *VT = getType()->getAs<VectorType>())
3440 return VT->getNumElements();
3444 /// containsDuplicateElements - Return true if any element access is repeated.
3445 bool ExtVectorElementExpr::containsDuplicateElements() const {
3446 // FIXME: Refactor this code to an accessor on the AST node which returns the
3447 // "type" of component access, and share with code below and in Sema.
3448 StringRef Comp = Accessor->getName();
3450 // Halving swizzles do not contain duplicate elements.
3451 if (Comp == "hi" || Comp == "lo" || Comp == "even" || Comp == "odd")
3454 // Advance past s-char prefix on hex swizzles.
3455 if (Comp[0] == 's' || Comp[0] == 'S')
3456 Comp = Comp.substr(1);
3458 for (unsigned i = 0, e = Comp.size(); i != e; ++i)
3459 if (Comp.substr(i + 1).find(Comp[i]) != StringRef::npos)
3465 /// getEncodedElementAccess - We encode the fields as a llvm ConstantArray.
3466 void ExtVectorElementExpr::getEncodedElementAccess(
3467 SmallVectorImpl<uint32_t> &Elts) const {
3468 StringRef Comp = Accessor->getName();
3469 bool isNumericAccessor = false;
3470 if (Comp[0] == 's' || Comp[0] == 'S') {
3471 Comp = Comp.substr(1);
3472 isNumericAccessor = true;
3475 bool isHi = Comp == "hi";
3476 bool isLo = Comp == "lo";
3477 bool isEven = Comp == "even";
3478 bool isOdd = Comp == "odd";
3480 for (unsigned i = 0, e = getNumElements(); i != e; ++i) {
3492 Index = ExtVectorType::getAccessorIdx(Comp[i], isNumericAccessor);
3494 Elts.push_back(Index);
3498 ShuffleVectorExpr::ShuffleVectorExpr(const ASTContext &C, ArrayRef<Expr*> args,
3499 QualType Type, SourceLocation BLoc,
3501 : Expr(ShuffleVectorExprClass, Type, VK_RValue, OK_Ordinary,
3502 Type->isDependentType(), Type->isDependentType(),
3503 Type->isInstantiationDependentType(),
3504 Type->containsUnexpandedParameterPack()),
3505 BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(args.size())
3507 SubExprs = new (C) Stmt*[args.size()];
3508 for (unsigned i = 0; i != args.size(); i++) {
3509 if (args[i]->isTypeDependent())
3510 ExprBits.TypeDependent = true;
3511 if (args[i]->isValueDependent())
3512 ExprBits.ValueDependent = true;
3513 if (args[i]->isInstantiationDependent())
3514 ExprBits.InstantiationDependent = true;
3515 if (args[i]->containsUnexpandedParameterPack())
3516 ExprBits.ContainsUnexpandedParameterPack = true;
3518 SubExprs[i] = args[i];
3522 void ShuffleVectorExpr::setExprs(const ASTContext &C, ArrayRef<Expr *> Exprs) {
3523 if (SubExprs) C.Deallocate(SubExprs);
3525 this->NumExprs = Exprs.size();
3526 SubExprs = new (C) Stmt*[NumExprs];
3527 memcpy(SubExprs, Exprs.data(), sizeof(Expr *) * Exprs.size());
3530 GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
3531 SourceLocation GenericLoc, Expr *ControllingExpr,
3532 ArrayRef<TypeSourceInfo*> AssocTypes,
3533 ArrayRef<Expr*> AssocExprs,
3534 SourceLocation DefaultLoc,
3535 SourceLocation RParenLoc,
3536 bool ContainsUnexpandedParameterPack,
3537 unsigned ResultIndex)
3538 : Expr(GenericSelectionExprClass,
3539 AssocExprs[ResultIndex]->getType(),
3540 AssocExprs[ResultIndex]->getValueKind(),
3541 AssocExprs[ResultIndex]->getObjectKind(),
3542 AssocExprs[ResultIndex]->isTypeDependent(),
3543 AssocExprs[ResultIndex]->isValueDependent(),
3544 AssocExprs[ResultIndex]->isInstantiationDependent(),
3545 ContainsUnexpandedParameterPack),
3546 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3547 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3548 NumAssocs(AssocExprs.size()), ResultIndex(ResultIndex),
3549 GenericLoc(GenericLoc), DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3550 SubExprs[CONTROLLING] = ControllingExpr;
3551 assert(AssocTypes.size() == AssocExprs.size());
3552 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3553 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3556 GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
3557 SourceLocation GenericLoc, Expr *ControllingExpr,
3558 ArrayRef<TypeSourceInfo*> AssocTypes,
3559 ArrayRef<Expr*> AssocExprs,
3560 SourceLocation DefaultLoc,
3561 SourceLocation RParenLoc,
3562 bool ContainsUnexpandedParameterPack)
3563 : Expr(GenericSelectionExprClass,
3564 Context.DependentTy,
3567 /*isTypeDependent=*/true,
3568 /*isValueDependent=*/true,
3569 /*isInstantiationDependent=*/true,
3570 ContainsUnexpandedParameterPack),
3571 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3572 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3573 NumAssocs(AssocExprs.size()), ResultIndex(-1U), GenericLoc(GenericLoc),
3574 DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3575 SubExprs[CONTROLLING] = ControllingExpr;
3576 assert(AssocTypes.size() == AssocExprs.size());
3577 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3578 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3581 //===----------------------------------------------------------------------===//
3582 // DesignatedInitExpr
3583 //===----------------------------------------------------------------------===//
3585 IdentifierInfo *DesignatedInitExpr::Designator::getFieldName() const {
3586 assert(Kind == FieldDesignator && "Only valid on a field designator");
3587 if (Field.NameOrField & 0x01)
3588 return reinterpret_cast<IdentifierInfo *>(Field.NameOrField&~0x01);
3590 return getField()->getIdentifier();
3593 DesignatedInitExpr::DesignatedInitExpr(const ASTContext &C, QualType Ty,
3594 llvm::ArrayRef<Designator> Designators,
3595 SourceLocation EqualOrColonLoc,
3597 ArrayRef<Expr*> IndexExprs,
3599 : Expr(DesignatedInitExprClass, Ty,
3600 Init->getValueKind(), Init->getObjectKind(),
3601 Init->isTypeDependent(), Init->isValueDependent(),
3602 Init->isInstantiationDependent(),
3603 Init->containsUnexpandedParameterPack()),
3604 EqualOrColonLoc(EqualOrColonLoc), GNUSyntax(GNUSyntax),
3605 NumDesignators(Designators.size()), NumSubExprs(IndexExprs.size() + 1) {
3606 this->Designators = new (C) Designator[NumDesignators];
3608 // Record the initializer itself.
3609 child_iterator Child = child_begin();
3612 // Copy the designators and their subexpressions, computing
3613 // value-dependence along the way.
3614 unsigned IndexIdx = 0;
3615 for (unsigned I = 0; I != NumDesignators; ++I) {
3616 this->Designators[I] = Designators[I];
3618 if (this->Designators[I].isArrayDesignator()) {
3619 // Compute type- and value-dependence.
3620 Expr *Index = IndexExprs[IndexIdx];
3621 if (Index->isTypeDependent() || Index->isValueDependent())
3622 ExprBits.TypeDependent = ExprBits.ValueDependent = true;
3623 if (Index->isInstantiationDependent())
3624 ExprBits.InstantiationDependent = true;
3625 // Propagate unexpanded parameter packs.
3626 if (Index->containsUnexpandedParameterPack())
3627 ExprBits.ContainsUnexpandedParameterPack = true;
3629 // Copy the index expressions into permanent storage.
3630 *Child++ = IndexExprs[IndexIdx++];
3631 } else if (this->Designators[I].isArrayRangeDesignator()) {
3632 // Compute type- and value-dependence.
3633 Expr *Start = IndexExprs[IndexIdx];
3634 Expr *End = IndexExprs[IndexIdx + 1];
3635 if (Start->isTypeDependent() || Start->isValueDependent() ||
3636 End->isTypeDependent() || End->isValueDependent()) {
3637 ExprBits.TypeDependent = ExprBits.ValueDependent = true;
3638 ExprBits.InstantiationDependent = true;
3639 } else if (Start->isInstantiationDependent() ||
3640 End->isInstantiationDependent()) {
3641 ExprBits.InstantiationDependent = true;
3644 // Propagate unexpanded parameter packs.
3645 if (Start->containsUnexpandedParameterPack() ||
3646 End->containsUnexpandedParameterPack())
3647 ExprBits.ContainsUnexpandedParameterPack = true;
3649 // Copy the start/end expressions into permanent storage.
3650 *Child++ = IndexExprs[IndexIdx++];
3651 *Child++ = IndexExprs[IndexIdx++];
3655 assert(IndexIdx == IndexExprs.size() && "Wrong number of index expressions");
3658 DesignatedInitExpr *
3659 DesignatedInitExpr::Create(const ASTContext &C,
3660 llvm::ArrayRef<Designator> Designators,
3661 ArrayRef<Expr*> IndexExprs,
3662 SourceLocation ColonOrEqualLoc,
3663 bool UsesColonSyntax, Expr *Init) {
3664 void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(IndexExprs.size() + 1),
3665 alignof(DesignatedInitExpr));
3666 return new (Mem) DesignatedInitExpr(C, C.VoidTy, Designators,
3667 ColonOrEqualLoc, UsesColonSyntax,
3671 DesignatedInitExpr *DesignatedInitExpr::CreateEmpty(const ASTContext &C,
3672 unsigned NumIndexExprs) {
3673 void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(NumIndexExprs + 1),
3674 alignof(DesignatedInitExpr));
3675 return new (Mem) DesignatedInitExpr(NumIndexExprs + 1);
3678 void DesignatedInitExpr::setDesignators(const ASTContext &C,
3679 const Designator *Desigs,
3680 unsigned NumDesigs) {
3681 Designators = new (C) Designator[NumDesigs];
3682 NumDesignators = NumDesigs;
3683 for (unsigned I = 0; I != NumDesigs; ++I)
3684 Designators[I] = Desigs[I];
3687 SourceRange DesignatedInitExpr::getDesignatorsSourceRange() const {
3688 DesignatedInitExpr *DIE = const_cast<DesignatedInitExpr*>(this);
3690 return DIE->getDesignator(0)->getSourceRange();
3691 return SourceRange(DIE->getDesignator(0)->getLocStart(),
3692 DIE->getDesignator(size()-1)->getLocEnd());
3695 SourceLocation DesignatedInitExpr::getLocStart() const {
3696 SourceLocation StartLoc;
3697 auto *DIE = const_cast<DesignatedInitExpr *>(this);
3698 Designator &First = *DIE->getDesignator(0);
3699 if (First.isFieldDesignator()) {
3701 StartLoc = SourceLocation::getFromRawEncoding(First.Field.FieldLoc);
3703 StartLoc = SourceLocation::getFromRawEncoding(First.Field.DotLoc);
3706 SourceLocation::getFromRawEncoding(First.ArrayOrRange.LBracketLoc);
3710 SourceLocation DesignatedInitExpr::getLocEnd() const {
3711 return getInit()->getLocEnd();
3714 Expr *DesignatedInitExpr::getArrayIndex(const Designator& D) const {
3715 assert(D.Kind == Designator::ArrayDesignator && "Requires array designator");
3716 return getSubExpr(D.ArrayOrRange.Index + 1);
3719 Expr *DesignatedInitExpr::getArrayRangeStart(const Designator &D) const {
3720 assert(D.Kind == Designator::ArrayRangeDesignator &&
3721 "Requires array range designator");
3722 return getSubExpr(D.ArrayOrRange.Index + 1);
3725 Expr *DesignatedInitExpr::getArrayRangeEnd(const Designator &D) const {
3726 assert(D.Kind == Designator::ArrayRangeDesignator &&
3727 "Requires array range designator");
3728 return getSubExpr(D.ArrayOrRange.Index + 2);
3731 /// \brief Replaces the designator at index @p Idx with the series
3732 /// of designators in [First, Last).
3733 void DesignatedInitExpr::ExpandDesignator(const ASTContext &C, unsigned Idx,
3734 const Designator *First,
3735 const Designator *Last) {
3736 unsigned NumNewDesignators = Last - First;
3737 if (NumNewDesignators == 0) {
3738 std::copy_backward(Designators + Idx + 1,
3739 Designators + NumDesignators,
3741 --NumNewDesignators;
3743 } else if (NumNewDesignators == 1) {
3744 Designators[Idx] = *First;
3748 Designator *NewDesignators
3749 = new (C) Designator[NumDesignators - 1 + NumNewDesignators];
3750 std::copy(Designators, Designators + Idx, NewDesignators);
3751 std::copy(First, Last, NewDesignators + Idx);
3752 std::copy(Designators + Idx + 1, Designators + NumDesignators,
3753 NewDesignators + Idx + NumNewDesignators);
3754 Designators = NewDesignators;
3755 NumDesignators = NumDesignators - 1 + NumNewDesignators;
3758 DesignatedInitUpdateExpr::DesignatedInitUpdateExpr(const ASTContext &C,
3759 SourceLocation lBraceLoc, Expr *baseExpr, SourceLocation rBraceLoc)
3760 : Expr(DesignatedInitUpdateExprClass, baseExpr->getType(), VK_RValue,
3761 OK_Ordinary, false, false, false, false) {
3762 BaseAndUpdaterExprs[0] = baseExpr;
3764 InitListExpr *ILE = new (C) InitListExpr(C, lBraceLoc, None, rBraceLoc);
3765 ILE->setType(baseExpr->getType());
3766 BaseAndUpdaterExprs[1] = ILE;
3769 SourceLocation DesignatedInitUpdateExpr::getLocStart() const {
3770 return getBase()->getLocStart();
3773 SourceLocation DesignatedInitUpdateExpr::getLocEnd() const {
3774 return getBase()->getLocEnd();
3777 ParenListExpr::ParenListExpr(const ASTContext& C, SourceLocation lparenloc,
3778 ArrayRef<Expr*> exprs,
3779 SourceLocation rparenloc)
3780 : Expr(ParenListExprClass, QualType(), VK_RValue, OK_Ordinary,
3781 false, false, false, false),
3782 NumExprs(exprs.size()), LParenLoc(lparenloc), RParenLoc(rparenloc) {
3783 Exprs = new (C) Stmt*[exprs.size()];
3784 for (unsigned i = 0; i != exprs.size(); ++i) {
3785 if (exprs[i]->isTypeDependent())
3786 ExprBits.TypeDependent = true;
3787 if (exprs[i]->isValueDependent())
3788 ExprBits.ValueDependent = true;
3789 if (exprs[i]->isInstantiationDependent())
3790 ExprBits.InstantiationDependent = true;
3791 if (exprs[i]->containsUnexpandedParameterPack())
3792 ExprBits.ContainsUnexpandedParameterPack = true;
3794 Exprs[i] = exprs[i];
3798 const OpaqueValueExpr *OpaqueValueExpr::findInCopyConstruct(const Expr *e) {
3799 if (const ExprWithCleanups *ewc = dyn_cast<ExprWithCleanups>(e))
3800 e = ewc->getSubExpr();
3801 if (const MaterializeTemporaryExpr *m = dyn_cast<MaterializeTemporaryExpr>(e))
3802 e = m->GetTemporaryExpr();
3803 e = cast<CXXConstructExpr>(e)->getArg(0);
3804 while (const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(e))
3805 e = ice->getSubExpr();
3806 return cast<OpaqueValueExpr>(e);
3809 PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &Context,
3811 unsigned numSemanticExprs) {
3813 Context.Allocate(totalSizeToAlloc<Expr *>(1 + numSemanticExprs),
3814 alignof(PseudoObjectExpr));
3815 return new(buffer) PseudoObjectExpr(sh, numSemanticExprs);
3818 PseudoObjectExpr::PseudoObjectExpr(EmptyShell shell, unsigned numSemanticExprs)
3819 : Expr(PseudoObjectExprClass, shell) {
3820 PseudoObjectExprBits.NumSubExprs = numSemanticExprs + 1;
3823 PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &C, Expr *syntax,
3824 ArrayRef<Expr*> semantics,
3825 unsigned resultIndex) {
3826 assert(syntax && "no syntactic expression!");
3827 assert(semantics.size() && "no semantic expressions!");
3831 if (resultIndex == NoResult) {
3835 assert(resultIndex < semantics.size());
3836 type = semantics[resultIndex]->getType();
3837 VK = semantics[resultIndex]->getValueKind();
3838 assert(semantics[resultIndex]->getObjectKind() == OK_Ordinary);
3841 void *buffer = C.Allocate(totalSizeToAlloc<Expr *>(semantics.size() + 1),
3842 alignof(PseudoObjectExpr));
3843 return new(buffer) PseudoObjectExpr(type, VK, syntax, semantics,
3847 PseudoObjectExpr::PseudoObjectExpr(QualType type, ExprValueKind VK,
3848 Expr *syntax, ArrayRef<Expr*> semantics,
3849 unsigned resultIndex)
3850 : Expr(PseudoObjectExprClass, type, VK, OK_Ordinary,
3851 /*filled in at end of ctor*/ false, false, false, false) {
3852 PseudoObjectExprBits.NumSubExprs = semantics.size() + 1;
3853 PseudoObjectExprBits.ResultIndex = resultIndex + 1;
3855 for (unsigned i = 0, e = semantics.size() + 1; i != e; ++i) {
3856 Expr *E = (i == 0 ? syntax : semantics[i-1]);
3857 getSubExprsBuffer()[i] = E;
3859 if (E->isTypeDependent())
3860 ExprBits.TypeDependent = true;
3861 if (E->isValueDependent())
3862 ExprBits.ValueDependent = true;
3863 if (E->isInstantiationDependent())
3864 ExprBits.InstantiationDependent = true;
3865 if (E->containsUnexpandedParameterPack())
3866 ExprBits.ContainsUnexpandedParameterPack = true;
3868 if (isa<OpaqueValueExpr>(E))
3869 assert(cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr &&
3870 "opaque-value semantic expressions for pseudo-object "
3871 "operations must have sources");
3875 //===----------------------------------------------------------------------===//
3876 // Child Iterators for iterating over subexpressions/substatements
3877 //===----------------------------------------------------------------------===//
3879 // UnaryExprOrTypeTraitExpr
3880 Stmt::child_range UnaryExprOrTypeTraitExpr::children() {
3881 // If this is of a type and the type is a VLA type (and not a typedef), the
3882 // size expression of the VLA needs to be treated as an executable expression.
3883 // Why isn't this weirdness documented better in StmtIterator?
3884 if (isArgumentType()) {
3885 if (const VariableArrayType* T = dyn_cast<VariableArrayType>(
3886 getArgumentType().getTypePtr()))
3887 return child_range(child_iterator(T), child_iterator());
3888 return child_range(child_iterator(), child_iterator());
3890 return child_range(&Argument.Ex, &Argument.Ex + 1);
3893 AtomicExpr::AtomicExpr(SourceLocation BLoc, ArrayRef<Expr*> args,
3894 QualType t, AtomicOp op, SourceLocation RP)
3895 : Expr(AtomicExprClass, t, VK_RValue, OK_Ordinary,
3896 false, false, false, false),
3897 NumSubExprs(args.size()), BuiltinLoc(BLoc), RParenLoc(RP), Op(op)
3899 assert(args.size() == getNumSubExprs(op) && "wrong number of subexpressions");
3900 for (unsigned i = 0; i != args.size(); i++) {
3901 if (args[i]->isTypeDependent())
3902 ExprBits.TypeDependent = true;
3903 if (args[i]->isValueDependent())
3904 ExprBits.ValueDependent = true;
3905 if (args[i]->isInstantiationDependent())
3906 ExprBits.InstantiationDependent = true;
3907 if (args[i]->containsUnexpandedParameterPack())
3908 ExprBits.ContainsUnexpandedParameterPack = true;
3910 SubExprs[i] = args[i];
3914 unsigned AtomicExpr::getNumSubExprs(AtomicOp Op) {
3916 case AO__c11_atomic_init:
3917 case AO__c11_atomic_load:
3918 case AO__atomic_load_n:
3921 case AO__c11_atomic_store:
3922 case AO__c11_atomic_exchange:
3923 case AO__atomic_load:
3924 case AO__atomic_store:
3925 case AO__atomic_store_n:
3926 case AO__atomic_exchange_n:
3927 case AO__c11_atomic_fetch_add:
3928 case AO__c11_atomic_fetch_sub:
3929 case AO__c11_atomic_fetch_and:
3930 case AO__c11_atomic_fetch_or:
3931 case AO__c11_atomic_fetch_xor:
3932 case AO__atomic_fetch_add:
3933 case AO__atomic_fetch_sub:
3934 case AO__atomic_fetch_and:
3935 case AO__atomic_fetch_or:
3936 case AO__atomic_fetch_xor:
3937 case AO__atomic_fetch_nand:
3938 case AO__atomic_add_fetch:
3939 case AO__atomic_sub_fetch:
3940 case AO__atomic_and_fetch:
3941 case AO__atomic_or_fetch:
3942 case AO__atomic_xor_fetch:
3943 case AO__atomic_nand_fetch:
3946 case AO__atomic_exchange:
3949 case AO__c11_atomic_compare_exchange_strong:
3950 case AO__c11_atomic_compare_exchange_weak:
3953 case AO__atomic_compare_exchange:
3954 case AO__atomic_compare_exchange_n:
3957 llvm_unreachable("unknown atomic op");
3960 QualType OMPArraySectionExpr::getBaseOriginalType(const Expr *Base) {
3961 unsigned ArraySectionCount = 0;
3962 while (auto *OASE = dyn_cast<OMPArraySectionExpr>(Base->IgnoreParens())) {
3963 Base = OASE->getBase();
3964 ++ArraySectionCount;
3967 dyn_cast<ArraySubscriptExpr>(Base->IgnoreParenImpCasts())) {
3968 Base = ASE->getBase();
3969 ++ArraySectionCount;
3971 Base = Base->IgnoreParenImpCasts();
3972 auto OriginalTy = Base->getType();
3973 if (auto *DRE = dyn_cast<DeclRefExpr>(Base))
3974 if (auto *PVD = dyn_cast<ParmVarDecl>(DRE->getDecl()))
3975 OriginalTy = PVD->getOriginalType().getNonReferenceType();
3977 for (unsigned Cnt = 0; Cnt < ArraySectionCount; ++Cnt) {
3978 if (OriginalTy->isAnyPointerType())
3979 OriginalTy = OriginalTy->getPointeeType();
3981 assert (OriginalTy->isArrayType());
3982 OriginalTy = OriginalTy->castAsArrayTypeUnsafe()->getElementType();