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 *DCFunc = dyn_cast<FunctionDecl>(DC))
532 Out << ComputeName(IT, DCFunc) << "_block_invoke";
534 // For nested blocks, propagate up to the parent.
535 Out << ComputeName(IT, cast<BlockDecl>(DC));
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 '\n': OS << "\\n"; break;
974 case '\t': OS << "\\t"; break;
975 case '\a': OS << "\\a"; break;
976 case '\b': OS << "\\b"; break;
982 void StringLiteral::setString(const ASTContext &C, StringRef Str,
983 StringKind Kind, bool IsPascal) {
984 //FIXME: we assume that the string data comes from a target that uses the same
985 // code unit size and endianess for the type of string.
987 this->IsPascal = IsPascal;
989 CharByteWidth = mapCharByteWidth(C.getTargetInfo(),Kind);
990 assert((Str.size()%CharByteWidth == 0)
991 && "size of data must be multiple of CharByteWidth");
992 Length = Str.size()/CharByteWidth;
994 switch(CharByteWidth) {
996 char *AStrData = new (C) char[Length];
997 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
998 StrData.asChar = AStrData;
1002 uint16_t *AStrData = new (C) uint16_t[Length];
1003 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
1004 StrData.asUInt16 = AStrData;
1008 uint32_t *AStrData = new (C) uint32_t[Length];
1009 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
1010 StrData.asUInt32 = AStrData;
1014 llvm_unreachable("unsupported CharByteWidth");
1018 /// getLocationOfByte - Return a source location that points to the specified
1019 /// byte of this string literal.
1021 /// Strings are amazingly complex. They can be formed from multiple tokens and
1022 /// can have escape sequences in them in addition to the usual trigraph and
1023 /// escaped newline business. This routine handles this complexity.
1025 /// The *StartToken sets the first token to be searched in this function and
1026 /// the *StartTokenByteOffset is the byte offset of the first token. Before
1027 /// returning, it updates the *StartToken to the TokNo of the token being found
1028 /// and sets *StartTokenByteOffset to the byte offset of the token in the
1030 /// Using these two parameters can reduce the time complexity from O(n^2) to
1031 /// O(n) if one wants to get the location of byte for all the tokens in a
1035 StringLiteral::getLocationOfByte(unsigned ByteNo, const SourceManager &SM,
1036 const LangOptions &Features,
1037 const TargetInfo &Target, unsigned *StartToken,
1038 unsigned *StartTokenByteOffset) const {
1039 assert((Kind == StringLiteral::Ascii || Kind == StringLiteral::UTF8) &&
1040 "Only narrow string literals are currently supported");
1042 // Loop over all of the tokens in this string until we find the one that
1043 // contains the byte we're looking for.
1045 unsigned StringOffset = 0;
1047 TokNo = *StartToken;
1048 if (StartTokenByteOffset) {
1049 StringOffset = *StartTokenByteOffset;
1050 ByteNo -= StringOffset;
1053 assert(TokNo < getNumConcatenated() && "Invalid byte number!");
1054 SourceLocation StrTokLoc = getStrTokenLoc(TokNo);
1056 // Get the spelling of the string so that we can get the data that makes up
1057 // the string literal, not the identifier for the macro it is potentially
1058 // expanded through.
1059 SourceLocation StrTokSpellingLoc = SM.getSpellingLoc(StrTokLoc);
1061 // Re-lex the token to get its length and original spelling.
1062 std::pair<FileID, unsigned> LocInfo =
1063 SM.getDecomposedLoc(StrTokSpellingLoc);
1064 bool Invalid = false;
1065 StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid);
1067 if (StartTokenByteOffset != nullptr)
1068 *StartTokenByteOffset = StringOffset;
1069 if (StartToken != nullptr)
1070 *StartToken = TokNo;
1071 return StrTokSpellingLoc;
1074 const char *StrData = Buffer.data()+LocInfo.second;
1076 // Create a lexer starting at the beginning of this token.
1077 Lexer TheLexer(SM.getLocForStartOfFile(LocInfo.first), Features,
1078 Buffer.begin(), StrData, Buffer.end());
1080 TheLexer.LexFromRawLexer(TheTok);
1082 // Use the StringLiteralParser to compute the length of the string in bytes.
1083 StringLiteralParser SLP(TheTok, SM, Features, Target);
1084 unsigned TokNumBytes = SLP.GetStringLength();
1086 // If the byte is in this token, return the location of the byte.
1087 if (ByteNo < TokNumBytes ||
1088 (ByteNo == TokNumBytes && TokNo == getNumConcatenated() - 1)) {
1089 unsigned Offset = SLP.getOffsetOfStringByte(TheTok, ByteNo);
1091 // Now that we know the offset of the token in the spelling, use the
1092 // preprocessor to get the offset in the original source.
1093 if (StartTokenByteOffset != nullptr)
1094 *StartTokenByteOffset = StringOffset;
1095 if (StartToken != nullptr)
1096 *StartToken = TokNo;
1097 return Lexer::AdvanceToTokenCharacter(StrTokLoc, Offset, SM, Features);
1100 // Move to the next string token.
1101 StringOffset += TokNumBytes;
1103 ByteNo -= TokNumBytes;
1109 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1110 /// corresponds to, e.g. "sizeof" or "[pre]++".
1111 StringRef UnaryOperator::getOpcodeStr(Opcode Op) {
1113 #define UNARY_OPERATION(Name, Spelling) case UO_##Name: return Spelling;
1114 #include "clang/AST/OperationKinds.def"
1116 llvm_unreachable("Unknown unary operator");
1120 UnaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix) {
1122 default: llvm_unreachable("No unary operator for overloaded function");
1123 case OO_PlusPlus: return Postfix ? UO_PostInc : UO_PreInc;
1124 case OO_MinusMinus: return Postfix ? UO_PostDec : UO_PreDec;
1125 case OO_Amp: return UO_AddrOf;
1126 case OO_Star: return UO_Deref;
1127 case OO_Plus: return UO_Plus;
1128 case OO_Minus: return UO_Minus;
1129 case OO_Tilde: return UO_Not;
1130 case OO_Exclaim: return UO_LNot;
1131 case OO_Coawait: return UO_Coawait;
1135 OverloadedOperatorKind UnaryOperator::getOverloadedOperator(Opcode Opc) {
1137 case UO_PostInc: case UO_PreInc: return OO_PlusPlus;
1138 case UO_PostDec: case UO_PreDec: return OO_MinusMinus;
1139 case UO_AddrOf: return OO_Amp;
1140 case UO_Deref: return OO_Star;
1141 case UO_Plus: return OO_Plus;
1142 case UO_Minus: return OO_Minus;
1143 case UO_Not: return OO_Tilde;
1144 case UO_LNot: return OO_Exclaim;
1145 case UO_Coawait: return OO_Coawait;
1146 default: return OO_None;
1151 //===----------------------------------------------------------------------===//
1152 // Postfix Operators.
1153 //===----------------------------------------------------------------------===//
1155 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, Expr *fn,
1156 ArrayRef<Expr *> preargs, ArrayRef<Expr *> args, QualType t,
1157 ExprValueKind VK, SourceLocation rparenloc)
1158 : Expr(SC, t, VK, OK_Ordinary, fn->isTypeDependent(),
1159 fn->isValueDependent(), fn->isInstantiationDependent(),
1160 fn->containsUnexpandedParameterPack()),
1161 NumArgs(args.size()) {
1163 unsigned NumPreArgs = preargs.size();
1164 SubExprs = new (C) Stmt *[args.size()+PREARGS_START+NumPreArgs];
1166 for (unsigned i = 0; i != NumPreArgs; ++i) {
1167 updateDependenciesFromArg(preargs[i]);
1168 SubExprs[i+PREARGS_START] = preargs[i];
1170 for (unsigned i = 0; i != args.size(); ++i) {
1171 updateDependenciesFromArg(args[i]);
1172 SubExprs[i+PREARGS_START+NumPreArgs] = args[i];
1175 CallExprBits.NumPreArgs = NumPreArgs;
1176 RParenLoc = rparenloc;
1179 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, Expr *fn,
1180 ArrayRef<Expr *> args, QualType t, ExprValueKind VK,
1181 SourceLocation rparenloc)
1182 : CallExpr(C, SC, fn, ArrayRef<Expr *>(), args, t, VK, rparenloc) {}
1184 CallExpr::CallExpr(const ASTContext &C, Expr *fn, ArrayRef<Expr *> args,
1185 QualType t, ExprValueKind VK, SourceLocation rparenloc)
1186 : CallExpr(C, CallExprClass, fn, ArrayRef<Expr *>(), args, t, VK, rparenloc) {
1189 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, EmptyShell Empty)
1190 : CallExpr(C, SC, /*NumPreArgs=*/0, Empty) {}
1192 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, unsigned NumPreArgs,
1194 : Expr(SC, Empty), SubExprs(nullptr), NumArgs(0) {
1195 // FIXME: Why do we allocate this?
1196 SubExprs = new (C) Stmt*[PREARGS_START+NumPreArgs]();
1197 CallExprBits.NumPreArgs = NumPreArgs;
1200 void CallExpr::updateDependenciesFromArg(Expr *Arg) {
1201 if (Arg->isTypeDependent())
1202 ExprBits.TypeDependent = true;
1203 if (Arg->isValueDependent())
1204 ExprBits.ValueDependent = true;
1205 if (Arg->isInstantiationDependent())
1206 ExprBits.InstantiationDependent = true;
1207 if (Arg->containsUnexpandedParameterPack())
1208 ExprBits.ContainsUnexpandedParameterPack = true;
1211 FunctionDecl *CallExpr::getDirectCallee() {
1212 return dyn_cast_or_null<FunctionDecl>(getCalleeDecl());
1215 Decl *CallExpr::getCalleeDecl() {
1216 return getCallee()->getReferencedDeclOfCallee();
1219 Decl *Expr::getReferencedDeclOfCallee() {
1220 Expr *CEE = IgnoreParenImpCasts();
1222 while (SubstNonTypeTemplateParmExpr *NTTP
1223 = dyn_cast<SubstNonTypeTemplateParmExpr>(CEE)) {
1224 CEE = NTTP->getReplacement()->IgnoreParenCasts();
1227 // If we're calling a dereference, look at the pointer instead.
1228 if (BinaryOperator *BO = dyn_cast<BinaryOperator>(CEE)) {
1229 if (BO->isPtrMemOp())
1230 CEE = BO->getRHS()->IgnoreParenCasts();
1231 } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(CEE)) {
1232 if (UO->getOpcode() == UO_Deref)
1233 CEE = UO->getSubExpr()->IgnoreParenCasts();
1235 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE))
1236 return DRE->getDecl();
1237 if (MemberExpr *ME = dyn_cast<MemberExpr>(CEE))
1238 return ME->getMemberDecl();
1243 /// setNumArgs - This changes the number of arguments present in this call.
1244 /// Any orphaned expressions are deleted by this, and any new operands are set
1246 void CallExpr::setNumArgs(const ASTContext& C, unsigned NumArgs) {
1247 // No change, just return.
1248 if (NumArgs == getNumArgs()) return;
1250 // If shrinking # arguments, just delete the extras and forgot them.
1251 if (NumArgs < getNumArgs()) {
1252 this->NumArgs = NumArgs;
1256 // Otherwise, we are growing the # arguments. New an bigger argument array.
1257 unsigned NumPreArgs = getNumPreArgs();
1258 Stmt **NewSubExprs = new (C) Stmt*[NumArgs+PREARGS_START+NumPreArgs];
1260 for (unsigned i = 0; i != getNumArgs()+PREARGS_START+NumPreArgs; ++i)
1261 NewSubExprs[i] = SubExprs[i];
1262 // Null out new args.
1263 for (unsigned i = getNumArgs()+PREARGS_START+NumPreArgs;
1264 i != NumArgs+PREARGS_START+NumPreArgs; ++i)
1265 NewSubExprs[i] = nullptr;
1267 if (SubExprs) C.Deallocate(SubExprs);
1268 SubExprs = NewSubExprs;
1269 this->NumArgs = NumArgs;
1272 /// getBuiltinCallee - If this is a call to a builtin, return the builtin ID. If
1274 unsigned CallExpr::getBuiltinCallee() const {
1275 // All simple function calls (e.g. func()) are implicitly cast to pointer to
1276 // function. As a result, we try and obtain the DeclRefExpr from the
1277 // ImplicitCastExpr.
1278 const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee());
1279 if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()).
1282 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr());
1286 const FunctionDecl *FDecl = dyn_cast<FunctionDecl>(DRE->getDecl());
1290 if (!FDecl->getIdentifier())
1293 return FDecl->getBuiltinID();
1296 bool CallExpr::isUnevaluatedBuiltinCall(const ASTContext &Ctx) const {
1297 if (unsigned BI = getBuiltinCallee())
1298 return Ctx.BuiltinInfo.isUnevaluated(BI);
1302 QualType CallExpr::getCallReturnType(const ASTContext &Ctx) const {
1303 const Expr *Callee = getCallee();
1304 QualType CalleeType = Callee->getType();
1305 if (const auto *FnTypePtr = CalleeType->getAs<PointerType>()) {
1306 CalleeType = FnTypePtr->getPointeeType();
1307 } else if (const auto *BPT = CalleeType->getAs<BlockPointerType>()) {
1308 CalleeType = BPT->getPointeeType();
1309 } else if (CalleeType->isSpecificPlaceholderType(BuiltinType::BoundMember)) {
1310 if (isa<CXXPseudoDestructorExpr>(Callee->IgnoreParens()))
1313 // This should never be overloaded and so should never return null.
1314 CalleeType = Expr::findBoundMemberType(Callee);
1317 const FunctionType *FnType = CalleeType->castAs<FunctionType>();
1318 return FnType->getReturnType();
1321 SourceLocation CallExpr::getLocStart() const {
1322 if (isa<CXXOperatorCallExpr>(this))
1323 return cast<CXXOperatorCallExpr>(this)->getLocStart();
1325 SourceLocation begin = getCallee()->getLocStart();
1326 if (begin.isInvalid() && getNumArgs() > 0 && getArg(0))
1327 begin = getArg(0)->getLocStart();
1330 SourceLocation CallExpr::getLocEnd() const {
1331 if (isa<CXXOperatorCallExpr>(this))
1332 return cast<CXXOperatorCallExpr>(this)->getLocEnd();
1334 SourceLocation end = getRParenLoc();
1335 if (end.isInvalid() && getNumArgs() > 0 && getArg(getNumArgs() - 1))
1336 end = getArg(getNumArgs() - 1)->getLocEnd();
1340 OffsetOfExpr *OffsetOfExpr::Create(const ASTContext &C, QualType type,
1341 SourceLocation OperatorLoc,
1342 TypeSourceInfo *tsi,
1343 ArrayRef<OffsetOfNode> comps,
1344 ArrayRef<Expr*> exprs,
1345 SourceLocation RParenLoc) {
1346 void *Mem = C.Allocate(
1347 totalSizeToAlloc<OffsetOfNode, Expr *>(comps.size(), exprs.size()));
1349 return new (Mem) OffsetOfExpr(C, type, OperatorLoc, tsi, comps, exprs,
1353 OffsetOfExpr *OffsetOfExpr::CreateEmpty(const ASTContext &C,
1354 unsigned numComps, unsigned numExprs) {
1356 C.Allocate(totalSizeToAlloc<OffsetOfNode, Expr *>(numComps, numExprs));
1357 return new (Mem) OffsetOfExpr(numComps, numExprs);
1360 OffsetOfExpr::OffsetOfExpr(const ASTContext &C, QualType type,
1361 SourceLocation OperatorLoc, TypeSourceInfo *tsi,
1362 ArrayRef<OffsetOfNode> comps, ArrayRef<Expr*> exprs,
1363 SourceLocation RParenLoc)
1364 : Expr(OffsetOfExprClass, type, VK_RValue, OK_Ordinary,
1365 /*TypeDependent=*/false,
1366 /*ValueDependent=*/tsi->getType()->isDependentType(),
1367 tsi->getType()->isInstantiationDependentType(),
1368 tsi->getType()->containsUnexpandedParameterPack()),
1369 OperatorLoc(OperatorLoc), RParenLoc(RParenLoc), TSInfo(tsi),
1370 NumComps(comps.size()), NumExprs(exprs.size())
1372 for (unsigned i = 0; i != comps.size(); ++i) {
1373 setComponent(i, comps[i]);
1376 for (unsigned i = 0; i != exprs.size(); ++i) {
1377 if (exprs[i]->isTypeDependent() || exprs[i]->isValueDependent())
1378 ExprBits.ValueDependent = true;
1379 if (exprs[i]->containsUnexpandedParameterPack())
1380 ExprBits.ContainsUnexpandedParameterPack = true;
1382 setIndexExpr(i, exprs[i]);
1386 IdentifierInfo *OffsetOfNode::getFieldName() const {
1387 assert(getKind() == Field || getKind() == Identifier);
1388 if (getKind() == Field)
1389 return getField()->getIdentifier();
1391 return reinterpret_cast<IdentifierInfo *> (Data & ~(uintptr_t)Mask);
1394 UnaryExprOrTypeTraitExpr::UnaryExprOrTypeTraitExpr(
1395 UnaryExprOrTypeTrait ExprKind, Expr *E, QualType resultType,
1396 SourceLocation op, SourceLocation rp)
1397 : Expr(UnaryExprOrTypeTraitExprClass, resultType, VK_RValue, OK_Ordinary,
1398 false, // Never type-dependent (C++ [temp.dep.expr]p3).
1399 // Value-dependent if the argument is type-dependent.
1400 E->isTypeDependent(), E->isInstantiationDependent(),
1401 E->containsUnexpandedParameterPack()),
1402 OpLoc(op), RParenLoc(rp) {
1403 UnaryExprOrTypeTraitExprBits.Kind = ExprKind;
1404 UnaryExprOrTypeTraitExprBits.IsType = false;
1407 // Check to see if we are in the situation where alignof(decl) should be
1408 // dependent because decl's alignment is dependent.
1409 if (ExprKind == UETT_AlignOf) {
1410 if (!isValueDependent() || !isInstantiationDependent()) {
1411 E = E->IgnoreParens();
1413 const ValueDecl *D = nullptr;
1414 if (const auto *DRE = dyn_cast<DeclRefExpr>(E))
1416 else if (const auto *ME = dyn_cast<MemberExpr>(E))
1417 D = ME->getMemberDecl();
1420 for (const auto *I : D->specific_attrs<AlignedAttr>()) {
1421 if (I->isAlignmentDependent()) {
1422 setValueDependent(true);
1423 setInstantiationDependent(true);
1432 MemberExpr *MemberExpr::Create(
1433 const ASTContext &C, Expr *base, bool isarrow, SourceLocation OperatorLoc,
1434 NestedNameSpecifierLoc QualifierLoc, SourceLocation TemplateKWLoc,
1435 ValueDecl *memberdecl, DeclAccessPair founddecl,
1436 DeclarationNameInfo nameinfo, const TemplateArgumentListInfo *targs,
1437 QualType ty, ExprValueKind vk, ExprObjectKind ok) {
1439 bool hasQualOrFound = (QualifierLoc ||
1440 founddecl.getDecl() != memberdecl ||
1441 founddecl.getAccess() != memberdecl->getAccess());
1443 bool HasTemplateKWAndArgsInfo = targs || TemplateKWLoc.isValid();
1445 totalSizeToAlloc<MemberExprNameQualifier, ASTTemplateKWAndArgsInfo,
1446 TemplateArgumentLoc>(hasQualOrFound ? 1 : 0,
1447 HasTemplateKWAndArgsInfo ? 1 : 0,
1448 targs ? targs->size() : 0);
1450 void *Mem = C.Allocate(Size, alignof(MemberExpr));
1451 MemberExpr *E = new (Mem)
1452 MemberExpr(base, isarrow, OperatorLoc, memberdecl, nameinfo, ty, vk, ok);
1454 if (hasQualOrFound) {
1455 // FIXME: Wrong. We should be looking at the member declaration we found.
1456 if (QualifierLoc && QualifierLoc.getNestedNameSpecifier()->isDependent()) {
1457 E->setValueDependent(true);
1458 E->setTypeDependent(true);
1459 E->setInstantiationDependent(true);
1461 else if (QualifierLoc &&
1462 QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent())
1463 E->setInstantiationDependent(true);
1465 E->HasQualifierOrFoundDecl = true;
1467 MemberExprNameQualifier *NQ =
1468 E->getTrailingObjects<MemberExprNameQualifier>();
1469 NQ->QualifierLoc = QualifierLoc;
1470 NQ->FoundDecl = founddecl;
1473 E->HasTemplateKWAndArgsInfo = (targs || TemplateKWLoc.isValid());
1476 bool Dependent = false;
1477 bool InstantiationDependent = false;
1478 bool ContainsUnexpandedParameterPack = false;
1479 E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
1480 TemplateKWLoc, *targs, E->getTrailingObjects<TemplateArgumentLoc>(),
1481 Dependent, InstantiationDependent, ContainsUnexpandedParameterPack);
1482 if (InstantiationDependent)
1483 E->setInstantiationDependent(true);
1484 } else if (TemplateKWLoc.isValid()) {
1485 E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
1492 SourceLocation MemberExpr::getLocStart() const {
1493 if (isImplicitAccess()) {
1495 return getQualifierLoc().getBeginLoc();
1499 // FIXME: We don't want this to happen. Rather, we should be able to
1500 // detect all kinds of implicit accesses more cleanly.
1501 SourceLocation BaseStartLoc = getBase()->getLocStart();
1502 if (BaseStartLoc.isValid())
1503 return BaseStartLoc;
1506 SourceLocation MemberExpr::getLocEnd() const {
1507 SourceLocation EndLoc = getMemberNameInfo().getEndLoc();
1508 if (hasExplicitTemplateArgs())
1509 EndLoc = getRAngleLoc();
1510 else if (EndLoc.isInvalid())
1511 EndLoc = getBase()->getLocEnd();
1515 bool CastExpr::CastConsistency() const {
1516 switch (getCastKind()) {
1517 case CK_DerivedToBase:
1518 case CK_UncheckedDerivedToBase:
1519 case CK_DerivedToBaseMemberPointer:
1520 case CK_BaseToDerived:
1521 case CK_BaseToDerivedMemberPointer:
1522 assert(!path_empty() && "Cast kind should have a base path!");
1525 case CK_CPointerToObjCPointerCast:
1526 assert(getType()->isObjCObjectPointerType());
1527 assert(getSubExpr()->getType()->isPointerType());
1528 goto CheckNoBasePath;
1530 case CK_BlockPointerToObjCPointerCast:
1531 assert(getType()->isObjCObjectPointerType());
1532 assert(getSubExpr()->getType()->isBlockPointerType());
1533 goto CheckNoBasePath;
1535 case CK_ReinterpretMemberPointer:
1536 assert(getType()->isMemberPointerType());
1537 assert(getSubExpr()->getType()->isMemberPointerType());
1538 goto CheckNoBasePath;
1541 // Arbitrary casts to C pointer types count as bitcasts.
1542 // Otherwise, we should only have block and ObjC pointer casts
1543 // here if they stay within the type kind.
1544 if (!getType()->isPointerType()) {
1545 assert(getType()->isObjCObjectPointerType() ==
1546 getSubExpr()->getType()->isObjCObjectPointerType());
1547 assert(getType()->isBlockPointerType() ==
1548 getSubExpr()->getType()->isBlockPointerType());
1550 goto CheckNoBasePath;
1552 case CK_AnyPointerToBlockPointerCast:
1553 assert(getType()->isBlockPointerType());
1554 assert(getSubExpr()->getType()->isAnyPointerType() &&
1555 !getSubExpr()->getType()->isBlockPointerType());
1556 goto CheckNoBasePath;
1558 case CK_CopyAndAutoreleaseBlockObject:
1559 assert(getType()->isBlockPointerType());
1560 assert(getSubExpr()->getType()->isBlockPointerType());
1561 goto CheckNoBasePath;
1563 case CK_FunctionToPointerDecay:
1564 assert(getType()->isPointerType());
1565 assert(getSubExpr()->getType()->isFunctionType());
1566 goto CheckNoBasePath;
1568 case CK_AddressSpaceConversion:
1569 assert(getType()->isPointerType());
1570 assert(getSubExpr()->getType()->isPointerType());
1571 assert(getType()->getPointeeType().getAddressSpace() !=
1572 getSubExpr()->getType()->getPointeeType().getAddressSpace());
1573 // These should not have an inheritance path.
1576 case CK_ArrayToPointerDecay:
1577 case CK_NullToMemberPointer:
1578 case CK_NullToPointer:
1579 case CK_ConstructorConversion:
1580 case CK_IntegralToPointer:
1581 case CK_PointerToIntegral:
1583 case CK_VectorSplat:
1584 case CK_IntegralCast:
1585 case CK_BooleanToSignedIntegral:
1586 case CK_IntegralToFloating:
1587 case CK_FloatingToIntegral:
1588 case CK_FloatingCast:
1589 case CK_ObjCObjectLValueCast:
1590 case CK_FloatingRealToComplex:
1591 case CK_FloatingComplexToReal:
1592 case CK_FloatingComplexCast:
1593 case CK_FloatingComplexToIntegralComplex:
1594 case CK_IntegralRealToComplex:
1595 case CK_IntegralComplexToReal:
1596 case CK_IntegralComplexCast:
1597 case CK_IntegralComplexToFloatingComplex:
1598 case CK_ARCProduceObject:
1599 case CK_ARCConsumeObject:
1600 case CK_ARCReclaimReturnedObject:
1601 case CK_ARCExtendBlockObject:
1602 case CK_ZeroToOCLEvent:
1603 case CK_IntToOCLSampler:
1604 assert(!getType()->isBooleanType() && "unheralded conversion to bool");
1605 goto CheckNoBasePath;
1608 case CK_LValueToRValue:
1610 case CK_AtomicToNonAtomic:
1611 case CK_NonAtomicToAtomic:
1612 case CK_PointerToBoolean:
1613 case CK_IntegralToBoolean:
1614 case CK_FloatingToBoolean:
1615 case CK_MemberPointerToBoolean:
1616 case CK_FloatingComplexToBoolean:
1617 case CK_IntegralComplexToBoolean:
1618 case CK_LValueBitCast: // -> bool&
1619 case CK_UserDefinedConversion: // operator bool()
1620 case CK_BuiltinFnToFnPtr:
1622 assert(path_empty() && "Cast kind should not have a base path!");
1628 const char *CastExpr::getCastKindName() const {
1629 switch (getCastKind()) {
1630 #define CAST_OPERATION(Name) case CK_##Name: return #Name;
1631 #include "clang/AST/OperationKinds.def"
1633 llvm_unreachable("Unhandled cast kind!");
1636 Expr *CastExpr::getSubExprAsWritten() {
1637 Expr *SubExpr = nullptr;
1640 SubExpr = E->getSubExpr();
1642 // Skip through reference binding to temporary.
1643 if (MaterializeTemporaryExpr *Materialize
1644 = dyn_cast<MaterializeTemporaryExpr>(SubExpr))
1645 SubExpr = Materialize->GetTemporaryExpr();
1647 // Skip any temporary bindings; they're implicit.
1648 if (CXXBindTemporaryExpr *Binder = dyn_cast<CXXBindTemporaryExpr>(SubExpr))
1649 SubExpr = Binder->getSubExpr();
1651 // Conversions by constructor and conversion functions have a
1652 // subexpression describing the call; strip it off.
1653 if (E->getCastKind() == CK_ConstructorConversion)
1654 SubExpr = cast<CXXConstructExpr>(SubExpr)->getArg(0);
1655 else if (E->getCastKind() == CK_UserDefinedConversion) {
1656 assert((isa<CXXMemberCallExpr>(SubExpr) ||
1657 isa<BlockExpr>(SubExpr)) &&
1658 "Unexpected SubExpr for CK_UserDefinedConversion.");
1659 if (isa<CXXMemberCallExpr>(SubExpr))
1660 SubExpr = cast<CXXMemberCallExpr>(SubExpr)->getImplicitObjectArgument();
1663 // If the subexpression we're left with is an implicit cast, look
1664 // through that, too.
1665 } while ((E = dyn_cast<ImplicitCastExpr>(SubExpr)));
1670 CXXBaseSpecifier **CastExpr::path_buffer() {
1671 switch (getStmtClass()) {
1672 #define ABSTRACT_STMT(x)
1673 #define CASTEXPR(Type, Base) \
1674 case Stmt::Type##Class: \
1675 return static_cast<Type *>(this)->getTrailingObjects<CXXBaseSpecifier *>();
1676 #define STMT(Type, Base)
1677 #include "clang/AST/StmtNodes.inc"
1679 llvm_unreachable("non-cast expressions not possible here");
1683 ImplicitCastExpr *ImplicitCastExpr::Create(const ASTContext &C, QualType T,
1684 CastKind Kind, Expr *Operand,
1685 const CXXCastPath *BasePath,
1687 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1688 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1689 ImplicitCastExpr *E =
1690 new (Buffer) ImplicitCastExpr(T, Kind, Operand, PathSize, VK);
1692 std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
1693 E->getTrailingObjects<CXXBaseSpecifier *>());
1697 ImplicitCastExpr *ImplicitCastExpr::CreateEmpty(const ASTContext &C,
1698 unsigned PathSize) {
1699 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1700 return new (Buffer) ImplicitCastExpr(EmptyShell(), PathSize);
1704 CStyleCastExpr *CStyleCastExpr::Create(const ASTContext &C, QualType T,
1705 ExprValueKind VK, CastKind K, Expr *Op,
1706 const CXXCastPath *BasePath,
1707 TypeSourceInfo *WrittenTy,
1708 SourceLocation L, SourceLocation R) {
1709 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1710 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1712 new (Buffer) CStyleCastExpr(T, VK, K, Op, PathSize, WrittenTy, L, R);
1714 std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
1715 E->getTrailingObjects<CXXBaseSpecifier *>());
1719 CStyleCastExpr *CStyleCastExpr::CreateEmpty(const ASTContext &C,
1720 unsigned PathSize) {
1721 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1722 return new (Buffer) CStyleCastExpr(EmptyShell(), PathSize);
1725 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1726 /// corresponds to, e.g. "<<=".
1727 StringRef BinaryOperator::getOpcodeStr(Opcode Op) {
1729 #define BINARY_OPERATION(Name, Spelling) case BO_##Name: return Spelling;
1730 #include "clang/AST/OperationKinds.def"
1732 llvm_unreachable("Invalid OpCode!");
1736 BinaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO) {
1738 default: llvm_unreachable("Not an overloadable binary operator");
1739 case OO_Plus: return BO_Add;
1740 case OO_Minus: return BO_Sub;
1741 case OO_Star: return BO_Mul;
1742 case OO_Slash: return BO_Div;
1743 case OO_Percent: return BO_Rem;
1744 case OO_Caret: return BO_Xor;
1745 case OO_Amp: return BO_And;
1746 case OO_Pipe: return BO_Or;
1747 case OO_Equal: return BO_Assign;
1748 case OO_Less: return BO_LT;
1749 case OO_Greater: return BO_GT;
1750 case OO_PlusEqual: return BO_AddAssign;
1751 case OO_MinusEqual: return BO_SubAssign;
1752 case OO_StarEqual: return BO_MulAssign;
1753 case OO_SlashEqual: return BO_DivAssign;
1754 case OO_PercentEqual: return BO_RemAssign;
1755 case OO_CaretEqual: return BO_XorAssign;
1756 case OO_AmpEqual: return BO_AndAssign;
1757 case OO_PipeEqual: return BO_OrAssign;
1758 case OO_LessLess: return BO_Shl;
1759 case OO_GreaterGreater: return BO_Shr;
1760 case OO_LessLessEqual: return BO_ShlAssign;
1761 case OO_GreaterGreaterEqual: return BO_ShrAssign;
1762 case OO_EqualEqual: return BO_EQ;
1763 case OO_ExclaimEqual: return BO_NE;
1764 case OO_LessEqual: return BO_LE;
1765 case OO_GreaterEqual: return BO_GE;
1766 case OO_AmpAmp: return BO_LAnd;
1767 case OO_PipePipe: return BO_LOr;
1768 case OO_Comma: return BO_Comma;
1769 case OO_ArrowStar: return BO_PtrMemI;
1773 OverloadedOperatorKind BinaryOperator::getOverloadedOperator(Opcode Opc) {
1774 static const OverloadedOperatorKind OverOps[] = {
1775 /* .* Cannot be overloaded */OO_None, OO_ArrowStar,
1776 OO_Star, OO_Slash, OO_Percent,
1778 OO_LessLess, OO_GreaterGreater,
1779 OO_Less, OO_Greater, OO_LessEqual, OO_GreaterEqual,
1780 OO_EqualEqual, OO_ExclaimEqual,
1786 OO_Equal, OO_StarEqual,
1787 OO_SlashEqual, OO_PercentEqual,
1788 OO_PlusEqual, OO_MinusEqual,
1789 OO_LessLessEqual, OO_GreaterGreaterEqual,
1790 OO_AmpEqual, OO_CaretEqual,
1794 return OverOps[Opc];
1797 InitListExpr::InitListExpr(const ASTContext &C, SourceLocation lbraceloc,
1798 ArrayRef<Expr*> initExprs, SourceLocation rbraceloc)
1799 : Expr(InitListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false,
1801 InitExprs(C, initExprs.size()),
1802 LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), AltForm(nullptr, true)
1804 sawArrayRangeDesignator(false);
1805 for (unsigned I = 0; I != initExprs.size(); ++I) {
1806 if (initExprs[I]->isTypeDependent())
1807 ExprBits.TypeDependent = true;
1808 if (initExprs[I]->isValueDependent())
1809 ExprBits.ValueDependent = true;
1810 if (initExprs[I]->isInstantiationDependent())
1811 ExprBits.InstantiationDependent = true;
1812 if (initExprs[I]->containsUnexpandedParameterPack())
1813 ExprBits.ContainsUnexpandedParameterPack = true;
1816 InitExprs.insert(C, InitExprs.end(), initExprs.begin(), initExprs.end());
1819 void InitListExpr::reserveInits(const ASTContext &C, unsigned NumInits) {
1820 if (NumInits > InitExprs.size())
1821 InitExprs.reserve(C, NumInits);
1824 void InitListExpr::resizeInits(const ASTContext &C, unsigned NumInits) {
1825 InitExprs.resize(C, NumInits, nullptr);
1828 Expr *InitListExpr::updateInit(const ASTContext &C, unsigned Init, Expr *expr) {
1829 if (Init >= InitExprs.size()) {
1830 InitExprs.insert(C, InitExprs.end(), Init - InitExprs.size() + 1, nullptr);
1831 setInit(Init, expr);
1835 Expr *Result = cast_or_null<Expr>(InitExprs[Init]);
1836 setInit(Init, expr);
1840 void InitListExpr::setArrayFiller(Expr *filler) {
1841 assert(!hasArrayFiller() && "Filler already set!");
1842 ArrayFillerOrUnionFieldInit = filler;
1843 // Fill out any "holes" in the array due to designated initializers.
1844 Expr **inits = getInits();
1845 for (unsigned i = 0, e = getNumInits(); i != e; ++i)
1846 if (inits[i] == nullptr)
1850 bool InitListExpr::isStringLiteralInit() const {
1851 if (getNumInits() != 1)
1853 const ArrayType *AT = getType()->getAsArrayTypeUnsafe();
1854 if (!AT || !AT->getElementType()->isIntegerType())
1856 // It is possible for getInit() to return null.
1857 const Expr *Init = getInit(0);
1860 Init = Init->IgnoreParens();
1861 return isa<StringLiteral>(Init) || isa<ObjCEncodeExpr>(Init);
1864 SourceLocation InitListExpr::getLocStart() const {
1865 if (InitListExpr *SyntacticForm = getSyntacticForm())
1866 return SyntacticForm->getLocStart();
1867 SourceLocation Beg = LBraceLoc;
1868 if (Beg.isInvalid()) {
1869 // Find the first non-null initializer.
1870 for (InitExprsTy::const_iterator I = InitExprs.begin(),
1871 E = InitExprs.end();
1874 Beg = S->getLocStart();
1882 SourceLocation InitListExpr::getLocEnd() const {
1883 if (InitListExpr *SyntacticForm = getSyntacticForm())
1884 return SyntacticForm->getLocEnd();
1885 SourceLocation End = RBraceLoc;
1886 if (End.isInvalid()) {
1887 // Find the first non-null initializer from the end.
1888 for (InitExprsTy::const_reverse_iterator I = InitExprs.rbegin(),
1889 E = InitExprs.rend();
1892 End = S->getLocEnd();
1900 /// getFunctionType - Return the underlying function type for this block.
1902 const FunctionProtoType *BlockExpr::getFunctionType() const {
1903 // The block pointer is never sugared, but the function type might be.
1904 return cast<BlockPointerType>(getType())
1905 ->getPointeeType()->castAs<FunctionProtoType>();
1908 SourceLocation BlockExpr::getCaretLocation() const {
1909 return TheBlock->getCaretLocation();
1911 const Stmt *BlockExpr::getBody() const {
1912 return TheBlock->getBody();
1914 Stmt *BlockExpr::getBody() {
1915 return TheBlock->getBody();
1919 //===----------------------------------------------------------------------===//
1920 // Generic Expression Routines
1921 //===----------------------------------------------------------------------===//
1923 /// isUnusedResultAWarning - Return true if this immediate expression should
1924 /// be warned about if the result is unused. If so, fill in Loc and Ranges
1925 /// with location to warn on and the source range[s] to report with the
1927 bool Expr::isUnusedResultAWarning(const Expr *&WarnE, SourceLocation &Loc,
1928 SourceRange &R1, SourceRange &R2,
1929 ASTContext &Ctx) const {
1930 // Don't warn if the expr is type dependent. The type could end up
1931 // instantiating to void.
1932 if (isTypeDependent())
1935 switch (getStmtClass()) {
1937 if (getType()->isVoidType())
1941 R1 = getSourceRange();
1943 case ParenExprClass:
1944 return cast<ParenExpr>(this)->getSubExpr()->
1945 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
1946 case GenericSelectionExprClass:
1947 return cast<GenericSelectionExpr>(this)->getResultExpr()->
1948 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
1949 case ChooseExprClass:
1950 return cast<ChooseExpr>(this)->getChosenSubExpr()->
1951 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
1952 case UnaryOperatorClass: {
1953 const UnaryOperator *UO = cast<UnaryOperator>(this);
1955 switch (UO->getOpcode()) {
1964 // This is just the 'operator co_await' call inside the guts of a
1965 // dependent co_await call.
1969 case UO_PreDec: // ++/--
1970 return false; // Not a warning.
1973 // accessing a piece of a volatile complex is a side-effect.
1974 if (Ctx.getCanonicalType(UO->getSubExpr()->getType())
1975 .isVolatileQualified())
1979 return UO->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
1982 Loc = UO->getOperatorLoc();
1983 R1 = UO->getSubExpr()->getSourceRange();
1986 case BinaryOperatorClass: {
1987 const BinaryOperator *BO = cast<BinaryOperator>(this);
1988 switch (BO->getOpcode()) {
1991 // Consider the RHS of comma for side effects. LHS was checked by
1992 // Sema::CheckCommaOperands.
1994 // ((foo = <blah>), 0) is an idiom for hiding the result (and
1995 // lvalue-ness) of an assignment written in a macro.
1996 if (IntegerLiteral *IE =
1997 dyn_cast<IntegerLiteral>(BO->getRHS()->IgnoreParens()))
1998 if (IE->getValue() == 0)
2000 return BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2001 // Consider '||', '&&' to have side effects if the LHS or RHS does.
2004 if (!BO->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) ||
2005 !BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2009 if (BO->isAssignmentOp())
2012 Loc = BO->getOperatorLoc();
2013 R1 = BO->getLHS()->getSourceRange();
2014 R2 = BO->getRHS()->getSourceRange();
2017 case CompoundAssignOperatorClass:
2018 case VAArgExprClass:
2019 case AtomicExprClass:
2022 case ConditionalOperatorClass: {
2023 // If only one of the LHS or RHS is a warning, the operator might
2024 // be being used for control flow. Only warn if both the LHS and
2025 // RHS are warnings.
2026 const ConditionalOperator *Exp = cast<ConditionalOperator>(this);
2027 if (!Exp->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2031 return Exp->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2034 case MemberExprClass:
2036 Loc = cast<MemberExpr>(this)->getMemberLoc();
2037 R1 = SourceRange(Loc, Loc);
2038 R2 = cast<MemberExpr>(this)->getBase()->getSourceRange();
2041 case ArraySubscriptExprClass:
2043 Loc = cast<ArraySubscriptExpr>(this)->getRBracketLoc();
2044 R1 = cast<ArraySubscriptExpr>(this)->getLHS()->getSourceRange();
2045 R2 = cast<ArraySubscriptExpr>(this)->getRHS()->getSourceRange();
2048 case CXXOperatorCallExprClass: {
2049 // Warn about operator ==,!=,<,>,<=, and >= even when user-defined operator
2050 // overloads as there is no reasonable way to define these such that they
2051 // have non-trivial, desirable side-effects. See the -Wunused-comparison
2052 // warning: operators == and != are commonly typo'ed, and so warning on them
2053 // provides additional value as well. If this list is updated,
2054 // DiagnoseUnusedComparison should be as well.
2055 const CXXOperatorCallExpr *Op = cast<CXXOperatorCallExpr>(this);
2056 switch (Op->getOperator()) {
2060 case OO_ExclaimEqual:
2063 case OO_GreaterEqual:
2065 if (Op->getCallReturnType(Ctx)->isReferenceType() ||
2066 Op->getCallReturnType(Ctx)->isVoidType())
2069 Loc = Op->getOperatorLoc();
2070 R1 = Op->getSourceRange();
2074 // Fallthrough for generic call handling.
2077 case CXXMemberCallExprClass:
2078 case UserDefinedLiteralClass: {
2079 // If this is a direct call, get the callee.
2080 const CallExpr *CE = cast<CallExpr>(this);
2081 if (const Decl *FD = CE->getCalleeDecl()) {
2082 const FunctionDecl *Func = dyn_cast<FunctionDecl>(FD);
2083 bool HasWarnUnusedResultAttr = Func ? Func->hasUnusedResultAttr()
2084 : FD->hasAttr<WarnUnusedResultAttr>();
2086 // If the callee has attribute pure, const, or warn_unused_result, warn
2087 // about it. void foo() { strlen("bar"); } should warn.
2089 // Note: If new cases are added here, DiagnoseUnusedExprResult should be
2090 // updated to match for QoI.
2091 if (HasWarnUnusedResultAttr ||
2092 FD->hasAttr<PureAttr>() || FD->hasAttr<ConstAttr>()) {
2094 Loc = CE->getCallee()->getLocStart();
2095 R1 = CE->getCallee()->getSourceRange();
2097 if (unsigned NumArgs = CE->getNumArgs())
2098 R2 = SourceRange(CE->getArg(0)->getLocStart(),
2099 CE->getArg(NumArgs-1)->getLocEnd());
2106 // If we don't know precisely what we're looking at, let's not warn.
2107 case UnresolvedLookupExprClass:
2108 case CXXUnresolvedConstructExprClass:
2111 case CXXTemporaryObjectExprClass:
2112 case CXXConstructExprClass: {
2113 if (const CXXRecordDecl *Type = getType()->getAsCXXRecordDecl()) {
2114 if (Type->hasAttr<WarnUnusedAttr>()) {
2116 Loc = getLocStart();
2117 R1 = getSourceRange();
2124 case ObjCMessageExprClass: {
2125 const ObjCMessageExpr *ME = cast<ObjCMessageExpr>(this);
2126 if (Ctx.getLangOpts().ObjCAutoRefCount &&
2127 ME->isInstanceMessage() &&
2128 !ME->getType()->isVoidType() &&
2129 ME->getMethodFamily() == OMF_init) {
2132 R1 = ME->getSourceRange();
2136 if (const ObjCMethodDecl *MD = ME->getMethodDecl())
2137 if (MD->hasAttr<WarnUnusedResultAttr>()) {
2146 case ObjCPropertyRefExprClass:
2149 R1 = getSourceRange();
2152 case PseudoObjectExprClass: {
2153 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
2155 // Only complain about things that have the form of a getter.
2156 if (isa<UnaryOperator>(PO->getSyntacticForm()) ||
2157 isa<BinaryOperator>(PO->getSyntacticForm()))
2162 R1 = getSourceRange();
2166 case StmtExprClass: {
2167 // Statement exprs don't logically have side effects themselves, but are
2168 // sometimes used in macros in ways that give them a type that is unused.
2169 // For example ({ blah; foo(); }) will end up with a type if foo has a type.
2170 // however, if the result of the stmt expr is dead, we don't want to emit a
2172 const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt();
2173 if (!CS->body_empty()) {
2174 if (const Expr *E = dyn_cast<Expr>(CS->body_back()))
2175 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2176 if (const LabelStmt *Label = dyn_cast<LabelStmt>(CS->body_back()))
2177 if (const Expr *E = dyn_cast<Expr>(Label->getSubStmt()))
2178 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2181 if (getType()->isVoidType())
2184 Loc = cast<StmtExpr>(this)->getLParenLoc();
2185 R1 = getSourceRange();
2188 case CXXFunctionalCastExprClass:
2189 case CStyleCastExprClass: {
2190 // Ignore an explicit cast to void unless the operand is a non-trivial
2192 const CastExpr *CE = cast<CastExpr>(this);
2193 if (CE->getCastKind() == CK_ToVoid) {
2194 if (CE->getSubExpr()->isGLValue() &&
2195 CE->getSubExpr()->getType().isVolatileQualified()) {
2196 const DeclRefExpr *DRE =
2197 dyn_cast<DeclRefExpr>(CE->getSubExpr()->IgnoreParens());
2198 if (!(DRE && isa<VarDecl>(DRE->getDecl()) &&
2199 cast<VarDecl>(DRE->getDecl())->hasLocalStorage())) {
2200 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc,
2207 // If this is a cast to a constructor conversion, check the operand.
2208 // Otherwise, the result of the cast is unused.
2209 if (CE->getCastKind() == CK_ConstructorConversion)
2210 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2213 if (const CXXFunctionalCastExpr *CXXCE =
2214 dyn_cast<CXXFunctionalCastExpr>(this)) {
2215 Loc = CXXCE->getLocStart();
2216 R1 = CXXCE->getSubExpr()->getSourceRange();
2218 const CStyleCastExpr *CStyleCE = cast<CStyleCastExpr>(this);
2219 Loc = CStyleCE->getLParenLoc();
2220 R1 = CStyleCE->getSubExpr()->getSourceRange();
2224 case ImplicitCastExprClass: {
2225 const CastExpr *ICE = cast<ImplicitCastExpr>(this);
2227 // lvalue-to-rvalue conversion on a volatile lvalue is a side-effect.
2228 if (ICE->getCastKind() == CK_LValueToRValue &&
2229 ICE->getSubExpr()->getType().isVolatileQualified())
2232 return ICE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2234 case CXXDefaultArgExprClass:
2235 return (cast<CXXDefaultArgExpr>(this)
2236 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2237 case CXXDefaultInitExprClass:
2238 return (cast<CXXDefaultInitExpr>(this)
2239 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2241 case CXXNewExprClass:
2242 // FIXME: In theory, there might be new expressions that don't have side
2243 // effects (e.g. a placement new with an uninitialized POD).
2244 case CXXDeleteExprClass:
2246 case CXXBindTemporaryExprClass:
2247 return (cast<CXXBindTemporaryExpr>(this)
2248 ->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2249 case ExprWithCleanupsClass:
2250 return (cast<ExprWithCleanups>(this)
2251 ->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2255 /// isOBJCGCCandidate - Check if an expression is objc gc'able.
2256 /// returns true, if it is; false otherwise.
2257 bool Expr::isOBJCGCCandidate(ASTContext &Ctx) const {
2258 const Expr *E = IgnoreParens();
2259 switch (E->getStmtClass()) {
2262 case ObjCIvarRefExprClass:
2264 case Expr::UnaryOperatorClass:
2265 return cast<UnaryOperator>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2266 case ImplicitCastExprClass:
2267 return cast<ImplicitCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2268 case MaterializeTemporaryExprClass:
2269 return cast<MaterializeTemporaryExpr>(E)->GetTemporaryExpr()
2270 ->isOBJCGCCandidate(Ctx);
2271 case CStyleCastExprClass:
2272 return cast<CStyleCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2273 case DeclRefExprClass: {
2274 const Decl *D = cast<DeclRefExpr>(E)->getDecl();
2276 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
2277 if (VD->hasGlobalStorage())
2279 QualType T = VD->getType();
2280 // dereferencing to a pointer is always a gc'able candidate,
2281 // unless it is __weak.
2282 return T->isPointerType() &&
2283 (Ctx.getObjCGCAttrKind(T) != Qualifiers::Weak);
2287 case MemberExprClass: {
2288 const MemberExpr *M = cast<MemberExpr>(E);
2289 return M->getBase()->isOBJCGCCandidate(Ctx);
2291 case ArraySubscriptExprClass:
2292 return cast<ArraySubscriptExpr>(E)->getBase()->isOBJCGCCandidate(Ctx);
2296 bool Expr::isBoundMemberFunction(ASTContext &Ctx) const {
2297 if (isTypeDependent())
2299 return ClassifyLValue(Ctx) == Expr::LV_MemberFunction;
2302 QualType Expr::findBoundMemberType(const Expr *expr) {
2303 assert(expr->hasPlaceholderType(BuiltinType::BoundMember));
2305 // Bound member expressions are always one of these possibilities:
2306 // x->m x.m x->*y x.*y
2307 // (possibly parenthesized)
2309 expr = expr->IgnoreParens();
2310 if (const MemberExpr *mem = dyn_cast<MemberExpr>(expr)) {
2311 assert(isa<CXXMethodDecl>(mem->getMemberDecl()));
2312 return mem->getMemberDecl()->getType();
2315 if (const BinaryOperator *op = dyn_cast<BinaryOperator>(expr)) {
2316 QualType type = op->getRHS()->getType()->castAs<MemberPointerType>()
2318 assert(type->isFunctionType());
2322 assert(isa<UnresolvedMemberExpr>(expr) || isa<CXXPseudoDestructorExpr>(expr));
2326 Expr* Expr::IgnoreParens() {
2329 if (ParenExpr* P = dyn_cast<ParenExpr>(E)) {
2330 E = P->getSubExpr();
2333 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) {
2334 if (P->getOpcode() == UO_Extension) {
2335 E = P->getSubExpr();
2339 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) {
2340 if (!P->isResultDependent()) {
2341 E = P->getResultExpr();
2345 if (ChooseExpr* P = dyn_cast<ChooseExpr>(E)) {
2346 if (!P->isConditionDependent()) {
2347 E = P->getChosenSubExpr();
2355 /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr
2356 /// or CastExprs or ImplicitCastExprs, returning their operand.
2357 Expr *Expr::IgnoreParenCasts() {
2360 E = E->IgnoreParens();
2361 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2362 E = P->getSubExpr();
2365 if (MaterializeTemporaryExpr *Materialize
2366 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2367 E = Materialize->GetTemporaryExpr();
2370 if (SubstNonTypeTemplateParmExpr *NTTP
2371 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2372 E = NTTP->getReplacement();
2379 Expr *Expr::IgnoreCasts() {
2382 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2383 E = P->getSubExpr();
2386 if (MaterializeTemporaryExpr *Materialize
2387 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2388 E = Materialize->GetTemporaryExpr();
2391 if (SubstNonTypeTemplateParmExpr *NTTP
2392 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2393 E = NTTP->getReplacement();
2400 /// IgnoreParenLValueCasts - Ignore parentheses and lvalue-to-rvalue
2401 /// casts. This is intended purely as a temporary workaround for code
2402 /// that hasn't yet been rewritten to do the right thing about those
2403 /// casts, and may disappear along with the last internal use.
2404 Expr *Expr::IgnoreParenLValueCasts() {
2407 E = E->IgnoreParens();
2408 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2409 if (P->getCastKind() == CK_LValueToRValue) {
2410 E = P->getSubExpr();
2413 } else if (MaterializeTemporaryExpr *Materialize
2414 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2415 E = Materialize->GetTemporaryExpr();
2417 } else if (SubstNonTypeTemplateParmExpr *NTTP
2418 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2419 E = NTTP->getReplacement();
2427 Expr *Expr::ignoreParenBaseCasts() {
2430 E = E->IgnoreParens();
2431 if (CastExpr *CE = dyn_cast<CastExpr>(E)) {
2432 if (CE->getCastKind() == CK_DerivedToBase ||
2433 CE->getCastKind() == CK_UncheckedDerivedToBase ||
2434 CE->getCastKind() == CK_NoOp) {
2435 E = CE->getSubExpr();
2444 Expr *Expr::IgnoreParenImpCasts() {
2447 E = E->IgnoreParens();
2448 if (ImplicitCastExpr *P = dyn_cast<ImplicitCastExpr>(E)) {
2449 E = P->getSubExpr();
2452 if (MaterializeTemporaryExpr *Materialize
2453 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2454 E = Materialize->GetTemporaryExpr();
2457 if (SubstNonTypeTemplateParmExpr *NTTP
2458 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2459 E = NTTP->getReplacement();
2466 Expr *Expr::IgnoreConversionOperator() {
2467 if (CXXMemberCallExpr *MCE = dyn_cast<CXXMemberCallExpr>(this)) {
2468 if (MCE->getMethodDecl() && isa<CXXConversionDecl>(MCE->getMethodDecl()))
2469 return MCE->getImplicitObjectArgument();
2474 /// IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the
2475 /// value (including ptr->int casts of the same size). Strip off any
2476 /// ParenExpr or CastExprs, returning their operand.
2477 Expr *Expr::IgnoreParenNoopCasts(ASTContext &Ctx) {
2480 E = E->IgnoreParens();
2482 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2483 // We ignore integer <-> casts that are of the same width, ptr<->ptr and
2484 // ptr<->int casts of the same width. We also ignore all identity casts.
2485 Expr *SE = P->getSubExpr();
2487 if (Ctx.hasSameUnqualifiedType(E->getType(), SE->getType())) {
2492 if ((E->getType()->isPointerType() ||
2493 E->getType()->isIntegralType(Ctx)) &&
2494 (SE->getType()->isPointerType() ||
2495 SE->getType()->isIntegralType(Ctx)) &&
2496 Ctx.getTypeSize(E->getType()) == Ctx.getTypeSize(SE->getType())) {
2502 if (SubstNonTypeTemplateParmExpr *NTTP
2503 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2504 E = NTTP->getReplacement();
2512 bool Expr::isDefaultArgument() const {
2513 const Expr *E = this;
2514 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2515 E = M->GetTemporaryExpr();
2517 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E))
2518 E = ICE->getSubExprAsWritten();
2520 return isa<CXXDefaultArgExpr>(E);
2523 /// \brief Skip over any no-op casts and any temporary-binding
2525 static const Expr *skipTemporaryBindingsNoOpCastsAndParens(const Expr *E) {
2526 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2527 E = M->GetTemporaryExpr();
2529 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2530 if (ICE->getCastKind() == CK_NoOp)
2531 E = ICE->getSubExpr();
2536 while (const CXXBindTemporaryExpr *BE = dyn_cast<CXXBindTemporaryExpr>(E))
2537 E = BE->getSubExpr();
2539 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2540 if (ICE->getCastKind() == CK_NoOp)
2541 E = ICE->getSubExpr();
2546 return E->IgnoreParens();
2549 /// isTemporaryObject - Determines if this expression produces a
2550 /// temporary of the given class type.
2551 bool Expr::isTemporaryObject(ASTContext &C, const CXXRecordDecl *TempTy) const {
2552 if (!C.hasSameUnqualifiedType(getType(), C.getTypeDeclType(TempTy)))
2555 const Expr *E = skipTemporaryBindingsNoOpCastsAndParens(this);
2557 // Temporaries are by definition pr-values of class type.
2558 if (!E->Classify(C).isPRValue()) {
2559 // In this context, property reference is a message call and is pr-value.
2560 if (!isa<ObjCPropertyRefExpr>(E))
2564 // Black-list a few cases which yield pr-values of class type that don't
2565 // refer to temporaries of that type:
2567 // - implicit derived-to-base conversions
2568 if (isa<ImplicitCastExpr>(E)) {
2569 switch (cast<ImplicitCastExpr>(E)->getCastKind()) {
2570 case CK_DerivedToBase:
2571 case CK_UncheckedDerivedToBase:
2578 // - member expressions (all)
2579 if (isa<MemberExpr>(E))
2582 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E))
2583 if (BO->isPtrMemOp())
2586 // - opaque values (all)
2587 if (isa<OpaqueValueExpr>(E))
2593 bool Expr::isImplicitCXXThis() const {
2594 const Expr *E = this;
2596 // Strip away parentheses and casts we don't care about.
2598 if (const ParenExpr *Paren = dyn_cast<ParenExpr>(E)) {
2599 E = Paren->getSubExpr();
2603 if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2604 if (ICE->getCastKind() == CK_NoOp ||
2605 ICE->getCastKind() == CK_LValueToRValue ||
2606 ICE->getCastKind() == CK_DerivedToBase ||
2607 ICE->getCastKind() == CK_UncheckedDerivedToBase) {
2608 E = ICE->getSubExpr();
2613 if (const UnaryOperator* UnOp = dyn_cast<UnaryOperator>(E)) {
2614 if (UnOp->getOpcode() == UO_Extension) {
2615 E = UnOp->getSubExpr();
2620 if (const MaterializeTemporaryExpr *M
2621 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2622 E = M->GetTemporaryExpr();
2629 if (const CXXThisExpr *This = dyn_cast<CXXThisExpr>(E))
2630 return This->isImplicit();
2635 /// hasAnyTypeDependentArguments - Determines if any of the expressions
2636 /// in Exprs is type-dependent.
2637 bool Expr::hasAnyTypeDependentArguments(ArrayRef<Expr *> Exprs) {
2638 for (unsigned I = 0; I < Exprs.size(); ++I)
2639 if (Exprs[I]->isTypeDependent())
2645 bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef,
2646 const Expr **Culprit) const {
2647 // This function is attempting whether an expression is an initializer
2648 // which can be evaluated at compile-time. It very closely parallels
2649 // ConstExprEmitter in CGExprConstant.cpp; if they don't match, it
2650 // will lead to unexpected results. Like ConstExprEmitter, it falls back
2651 // to isEvaluatable most of the time.
2653 // If we ever capture reference-binding directly in the AST, we can
2654 // kill the second parameter.
2658 if (EvaluateAsLValue(Result, Ctx) && !Result.HasSideEffects)
2665 switch (getStmtClass()) {
2667 case StringLiteralClass:
2668 case ObjCEncodeExprClass:
2670 case CXXTemporaryObjectExprClass:
2671 case CXXConstructExprClass: {
2672 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
2674 if (CE->getConstructor()->isTrivial() &&
2675 CE->getConstructor()->getParent()->hasTrivialDestructor()) {
2676 // Trivial default constructor
2677 if (!CE->getNumArgs()) return true;
2679 // Trivial copy constructor
2680 assert(CE->getNumArgs() == 1 && "trivial ctor with > 1 argument");
2681 return CE->getArg(0)->isConstantInitializer(Ctx, false, Culprit);
2686 case CompoundLiteralExprClass: {
2687 // This handles gcc's extension that allows global initializers like
2688 // "struct x {int x;} x = (struct x) {};".
2689 // FIXME: This accepts other cases it shouldn't!
2690 const Expr *Exp = cast<CompoundLiteralExpr>(this)->getInitializer();
2691 return Exp->isConstantInitializer(Ctx, false, Culprit);
2693 case DesignatedInitUpdateExprClass: {
2694 const DesignatedInitUpdateExpr *DIUE = cast<DesignatedInitUpdateExpr>(this);
2695 return DIUE->getBase()->isConstantInitializer(Ctx, false, Culprit) &&
2696 DIUE->getUpdater()->isConstantInitializer(Ctx, false, Culprit);
2698 case InitListExprClass: {
2699 const InitListExpr *ILE = cast<InitListExpr>(this);
2700 if (ILE->getType()->isArrayType()) {
2701 unsigned numInits = ILE->getNumInits();
2702 for (unsigned i = 0; i < numInits; i++) {
2703 if (!ILE->getInit(i)->isConstantInitializer(Ctx, false, Culprit))
2709 if (ILE->getType()->isRecordType()) {
2710 unsigned ElementNo = 0;
2711 RecordDecl *RD = ILE->getType()->getAs<RecordType>()->getDecl();
2712 for (const auto *Field : RD->fields()) {
2713 // If this is a union, skip all the fields that aren't being initialized.
2714 if (RD->isUnion() && ILE->getInitializedFieldInUnion() != Field)
2717 // Don't emit anonymous bitfields, they just affect layout.
2718 if (Field->isUnnamedBitfield())
2721 if (ElementNo < ILE->getNumInits()) {
2722 const Expr *Elt = ILE->getInit(ElementNo++);
2723 if (Field->isBitField()) {
2724 // Bitfields have to evaluate to an integer.
2725 llvm::APSInt ResultTmp;
2726 if (!Elt->EvaluateAsInt(ResultTmp, Ctx)) {
2732 bool RefType = Field->getType()->isReferenceType();
2733 if (!Elt->isConstantInitializer(Ctx, RefType, Culprit))
2743 case ImplicitValueInitExprClass:
2744 case NoInitExprClass:
2746 case ParenExprClass:
2747 return cast<ParenExpr>(this)->getSubExpr()
2748 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2749 case GenericSelectionExprClass:
2750 return cast<GenericSelectionExpr>(this)->getResultExpr()
2751 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2752 case ChooseExprClass:
2753 if (cast<ChooseExpr>(this)->isConditionDependent()) {
2758 return cast<ChooseExpr>(this)->getChosenSubExpr()
2759 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2760 case UnaryOperatorClass: {
2761 const UnaryOperator* Exp = cast<UnaryOperator>(this);
2762 if (Exp->getOpcode() == UO_Extension)
2763 return Exp->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
2766 case CXXFunctionalCastExprClass:
2767 case CXXStaticCastExprClass:
2768 case ImplicitCastExprClass:
2769 case CStyleCastExprClass:
2770 case ObjCBridgedCastExprClass:
2771 case CXXDynamicCastExprClass:
2772 case CXXReinterpretCastExprClass:
2773 case CXXConstCastExprClass: {
2774 const CastExpr *CE = cast<CastExpr>(this);
2776 // Handle misc casts we want to ignore.
2777 if (CE->getCastKind() == CK_NoOp ||
2778 CE->getCastKind() == CK_LValueToRValue ||
2779 CE->getCastKind() == CK_ToUnion ||
2780 CE->getCastKind() == CK_ConstructorConversion ||
2781 CE->getCastKind() == CK_NonAtomicToAtomic ||
2782 CE->getCastKind() == CK_AtomicToNonAtomic ||
2783 CE->getCastKind() == CK_IntToOCLSampler)
2784 return CE->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
2788 case MaterializeTemporaryExprClass:
2789 return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
2790 ->isConstantInitializer(Ctx, false, Culprit);
2792 case SubstNonTypeTemplateParmExprClass:
2793 return cast<SubstNonTypeTemplateParmExpr>(this)->getReplacement()
2794 ->isConstantInitializer(Ctx, false, Culprit);
2795 case CXXDefaultArgExprClass:
2796 return cast<CXXDefaultArgExpr>(this)->getExpr()
2797 ->isConstantInitializer(Ctx, false, Culprit);
2798 case CXXDefaultInitExprClass:
2799 return cast<CXXDefaultInitExpr>(this)->getExpr()
2800 ->isConstantInitializer(Ctx, false, Culprit);
2802 // Allow certain forms of UB in constant initializers: signed integer
2803 // overflow and floating-point division by zero. We'll give a warning on
2804 // these, but they're common enough that we have to accept them.
2805 if (isEvaluatable(Ctx, SE_AllowUndefinedBehavior))
2813 /// \brief Look for any side effects within a Stmt.
2814 class SideEffectFinder : public ConstEvaluatedExprVisitor<SideEffectFinder> {
2815 typedef ConstEvaluatedExprVisitor<SideEffectFinder> Inherited;
2816 const bool IncludePossibleEffects;
2817 bool HasSideEffects;
2820 explicit SideEffectFinder(const ASTContext &Context, bool IncludePossible)
2821 : Inherited(Context),
2822 IncludePossibleEffects(IncludePossible), HasSideEffects(false) { }
2824 bool hasSideEffects() const { return HasSideEffects; }
2826 void VisitExpr(const Expr *E) {
2827 if (!HasSideEffects &&
2828 E->HasSideEffects(Context, IncludePossibleEffects))
2829 HasSideEffects = true;
2834 bool Expr::HasSideEffects(const ASTContext &Ctx,
2835 bool IncludePossibleEffects) const {
2836 // In circumstances where we care about definite side effects instead of
2837 // potential side effects, we want to ignore expressions that are part of a
2838 // macro expansion as a potential side effect.
2839 if (!IncludePossibleEffects && getExprLoc().isMacroID())
2842 if (isInstantiationDependent())
2843 return IncludePossibleEffects;
2845 switch (getStmtClass()) {
2847 #define ABSTRACT_STMT(Type)
2848 #define STMT(Type, Base) case Type##Class:
2849 #define EXPR(Type, Base)
2850 #include "clang/AST/StmtNodes.inc"
2851 llvm_unreachable("unexpected Expr kind");
2853 case DependentScopeDeclRefExprClass:
2854 case CXXUnresolvedConstructExprClass:
2855 case CXXDependentScopeMemberExprClass:
2856 case UnresolvedLookupExprClass:
2857 case UnresolvedMemberExprClass:
2858 case PackExpansionExprClass:
2859 case SubstNonTypeTemplateParmPackExprClass:
2860 case FunctionParmPackExprClass:
2862 case CXXFoldExprClass:
2863 llvm_unreachable("shouldn't see dependent / unresolved nodes here");
2865 case DeclRefExprClass:
2866 case ObjCIvarRefExprClass:
2867 case PredefinedExprClass:
2868 case IntegerLiteralClass:
2869 case FloatingLiteralClass:
2870 case ImaginaryLiteralClass:
2871 case StringLiteralClass:
2872 case CharacterLiteralClass:
2873 case OffsetOfExprClass:
2874 case ImplicitValueInitExprClass:
2875 case UnaryExprOrTypeTraitExprClass:
2876 case AddrLabelExprClass:
2877 case GNUNullExprClass:
2878 case NoInitExprClass:
2879 case CXXBoolLiteralExprClass:
2880 case CXXNullPtrLiteralExprClass:
2881 case CXXThisExprClass:
2882 case CXXScalarValueInitExprClass:
2883 case TypeTraitExprClass:
2884 case ArrayTypeTraitExprClass:
2885 case ExpressionTraitExprClass:
2886 case CXXNoexceptExprClass:
2887 case SizeOfPackExprClass:
2888 case ObjCStringLiteralClass:
2889 case ObjCEncodeExprClass:
2890 case ObjCBoolLiteralExprClass:
2891 case ObjCAvailabilityCheckExprClass:
2892 case CXXUuidofExprClass:
2893 case OpaqueValueExprClass:
2894 // These never have a side-effect.
2898 case CXXOperatorCallExprClass:
2899 case CXXMemberCallExprClass:
2900 case CUDAKernelCallExprClass:
2901 case UserDefinedLiteralClass: {
2902 // We don't know a call definitely has side effects, except for calls
2903 // to pure/const functions that definitely don't.
2904 // If the call itself is considered side-effect free, check the operands.
2905 const Decl *FD = cast<CallExpr>(this)->getCalleeDecl();
2906 bool IsPure = FD && (FD->hasAttr<ConstAttr>() || FD->hasAttr<PureAttr>());
2907 if (IsPure || !IncludePossibleEffects)
2912 case BlockExprClass:
2913 case CXXBindTemporaryExprClass:
2914 if (!IncludePossibleEffects)
2918 case MSPropertyRefExprClass:
2919 case MSPropertySubscriptExprClass:
2920 case CompoundAssignOperatorClass:
2921 case VAArgExprClass:
2922 case AtomicExprClass:
2923 case CXXThrowExprClass:
2924 case CXXNewExprClass:
2925 case CXXDeleteExprClass:
2926 case CoawaitExprClass:
2927 case CoyieldExprClass:
2928 // These always have a side-effect.
2931 case StmtExprClass: {
2932 // StmtExprs have a side-effect if any substatement does.
2933 SideEffectFinder Finder(Ctx, IncludePossibleEffects);
2934 Finder.Visit(cast<StmtExpr>(this)->getSubStmt());
2935 return Finder.hasSideEffects();
2938 case ExprWithCleanupsClass:
2939 if (IncludePossibleEffects)
2940 if (cast<ExprWithCleanups>(this)->cleanupsHaveSideEffects())
2944 case ParenExprClass:
2945 case ArraySubscriptExprClass:
2946 case OMPArraySectionExprClass:
2947 case MemberExprClass:
2948 case ConditionalOperatorClass:
2949 case BinaryConditionalOperatorClass:
2950 case CompoundLiteralExprClass:
2951 case ExtVectorElementExprClass:
2952 case DesignatedInitExprClass:
2953 case DesignatedInitUpdateExprClass:
2954 case ParenListExprClass:
2955 case CXXPseudoDestructorExprClass:
2956 case CXXStdInitializerListExprClass:
2957 case SubstNonTypeTemplateParmExprClass:
2958 case MaterializeTemporaryExprClass:
2959 case ShuffleVectorExprClass:
2960 case ConvertVectorExprClass:
2961 case AsTypeExprClass:
2962 // These have a side-effect if any subexpression does.
2965 case UnaryOperatorClass:
2966 if (cast<UnaryOperator>(this)->isIncrementDecrementOp())
2970 case BinaryOperatorClass:
2971 if (cast<BinaryOperator>(this)->isAssignmentOp())
2975 case InitListExprClass:
2976 // FIXME: The children for an InitListExpr doesn't include the array filler.
2977 if (const Expr *E = cast<InitListExpr>(this)->getArrayFiller())
2978 if (E->HasSideEffects(Ctx, IncludePossibleEffects))
2982 case GenericSelectionExprClass:
2983 return cast<GenericSelectionExpr>(this)->getResultExpr()->
2984 HasSideEffects(Ctx, IncludePossibleEffects);
2986 case ChooseExprClass:
2987 return cast<ChooseExpr>(this)->getChosenSubExpr()->HasSideEffects(
2988 Ctx, IncludePossibleEffects);
2990 case CXXDefaultArgExprClass:
2991 return cast<CXXDefaultArgExpr>(this)->getExpr()->HasSideEffects(
2992 Ctx, IncludePossibleEffects);
2994 case CXXDefaultInitExprClass: {
2995 const FieldDecl *FD = cast<CXXDefaultInitExpr>(this)->getField();
2996 if (const Expr *E = FD->getInClassInitializer())
2997 return E->HasSideEffects(Ctx, IncludePossibleEffects);
2998 // If we've not yet parsed the initializer, assume it has side-effects.
3002 case CXXDynamicCastExprClass: {
3003 // A dynamic_cast expression has side-effects if it can throw.
3004 const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(this);
3005 if (DCE->getTypeAsWritten()->isReferenceType() &&
3006 DCE->getCastKind() == CK_Dynamic)
3009 case ImplicitCastExprClass:
3010 case CStyleCastExprClass:
3011 case CXXStaticCastExprClass:
3012 case CXXReinterpretCastExprClass:
3013 case CXXConstCastExprClass:
3014 case CXXFunctionalCastExprClass: {
3015 // While volatile reads are side-effecting in both C and C++, we treat them
3016 // as having possible (not definite) side-effects. This allows idiomatic
3017 // code to behave without warning, such as sizeof(*v) for a volatile-
3018 // qualified pointer.
3019 if (!IncludePossibleEffects)
3022 const CastExpr *CE = cast<CastExpr>(this);
3023 if (CE->getCastKind() == CK_LValueToRValue &&
3024 CE->getSubExpr()->getType().isVolatileQualified())
3029 case CXXTypeidExprClass:
3030 // typeid might throw if its subexpression is potentially-evaluated, so has
3031 // side-effects in that case whether or not its subexpression does.
3032 return cast<CXXTypeidExpr>(this)->isPotentiallyEvaluated();
3034 case CXXConstructExprClass:
3035 case CXXTemporaryObjectExprClass: {
3036 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
3037 if (!CE->getConstructor()->isTrivial() && IncludePossibleEffects)
3039 // A trivial constructor does not add any side-effects of its own. Just look
3040 // at its arguments.
3044 case CXXInheritedCtorInitExprClass: {
3045 const auto *ICIE = cast<CXXInheritedCtorInitExpr>(this);
3046 if (!ICIE->getConstructor()->isTrivial() && IncludePossibleEffects)
3051 case LambdaExprClass: {
3052 const LambdaExpr *LE = cast<LambdaExpr>(this);
3053 for (LambdaExpr::capture_iterator I = LE->capture_begin(),
3054 E = LE->capture_end(); I != E; ++I)
3055 if (I->getCaptureKind() == LCK_ByCopy)
3056 // FIXME: Only has a side-effect if the variable is volatile or if
3057 // the copy would invoke a non-trivial copy constructor.
3062 case PseudoObjectExprClass: {
3063 // Only look for side-effects in the semantic form, and look past
3064 // OpaqueValueExpr bindings in that form.
3065 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
3066 for (PseudoObjectExpr::const_semantics_iterator I = PO->semantics_begin(),
3067 E = PO->semantics_end();
3069 const Expr *Subexpr = *I;
3070 if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(Subexpr))
3071 Subexpr = OVE->getSourceExpr();
3072 if (Subexpr->HasSideEffects(Ctx, IncludePossibleEffects))
3078 case ObjCBoxedExprClass:
3079 case ObjCArrayLiteralClass:
3080 case ObjCDictionaryLiteralClass:
3081 case ObjCSelectorExprClass:
3082 case ObjCProtocolExprClass:
3083 case ObjCIsaExprClass:
3084 case ObjCIndirectCopyRestoreExprClass:
3085 case ObjCSubscriptRefExprClass:
3086 case ObjCBridgedCastExprClass:
3087 case ObjCMessageExprClass:
3088 case ObjCPropertyRefExprClass:
3089 // FIXME: Classify these cases better.
3090 if (IncludePossibleEffects)
3095 // Recurse to children.
3096 for (const Stmt *SubStmt : children())
3098 cast<Expr>(SubStmt)->HasSideEffects(Ctx, IncludePossibleEffects))
3105 /// \brief Look for a call to a non-trivial function within an expression.
3106 class NonTrivialCallFinder : public ConstEvaluatedExprVisitor<NonTrivialCallFinder>
3108 typedef ConstEvaluatedExprVisitor<NonTrivialCallFinder> Inherited;
3113 explicit NonTrivialCallFinder(const ASTContext &Context)
3114 : Inherited(Context), NonTrivial(false) { }
3116 bool hasNonTrivialCall() const { return NonTrivial; }
3118 void VisitCallExpr(const CallExpr *E) {
3119 if (const CXXMethodDecl *Method
3120 = dyn_cast_or_null<const CXXMethodDecl>(E->getCalleeDecl())) {
3121 if (Method->isTrivial()) {
3122 // Recurse to children of the call.
3123 Inherited::VisitStmt(E);
3131 void VisitCXXConstructExpr(const CXXConstructExpr *E) {
3132 if (E->getConstructor()->isTrivial()) {
3133 // Recurse to children of the call.
3134 Inherited::VisitStmt(E);
3141 void VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *E) {
3142 if (E->getTemporary()->getDestructor()->isTrivial()) {
3143 Inherited::VisitStmt(E);
3152 bool Expr::hasNonTrivialCall(const ASTContext &Ctx) const {
3153 NonTrivialCallFinder Finder(Ctx);
3155 return Finder.hasNonTrivialCall();
3158 /// isNullPointerConstant - C99 6.3.2.3p3 - Return whether this is a null
3159 /// pointer constant or not, as well as the specific kind of constant detected.
3160 /// Null pointer constants can be integer constant expressions with the
3161 /// value zero, casts of zero to void*, nullptr (C++0X), or __null
3162 /// (a GNU extension).
3163 Expr::NullPointerConstantKind
3164 Expr::isNullPointerConstant(ASTContext &Ctx,
3165 NullPointerConstantValueDependence NPC) const {
3166 if (isValueDependent() &&
3167 (!Ctx.getLangOpts().CPlusPlus11 || Ctx.getLangOpts().MSVCCompat)) {
3169 case NPC_NeverValueDependent:
3170 llvm_unreachable("Unexpected value dependent expression!");
3171 case NPC_ValueDependentIsNull:
3172 if (isTypeDependent() || getType()->isIntegralType(Ctx))
3173 return NPCK_ZeroExpression;
3175 return NPCK_NotNull;
3177 case NPC_ValueDependentIsNotNull:
3178 return NPCK_NotNull;
3182 // Strip off a cast to void*, if it exists. Except in C++.
3183 if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) {
3184 if (!Ctx.getLangOpts().CPlusPlus) {
3185 // Check that it is a cast to void*.
3186 if (const PointerType *PT = CE->getType()->getAs<PointerType>()) {
3187 QualType Pointee = PT->getPointeeType();
3188 Qualifiers Q = Pointee.getQualifiers();
3189 // In OpenCL v2.0 generic address space acts as a placeholder
3190 // and should be ignored.
3191 bool IsASValid = true;
3192 if (Ctx.getLangOpts().OpenCLVersion >= 200) {
3193 if (Pointee.getAddressSpace() == LangAS::opencl_generic)
3194 Q.removeAddressSpace();
3199 if (IsASValid && !Q.hasQualifiers() &&
3200 Pointee->isVoidType() && // to void*
3201 CE->getSubExpr()->getType()->isIntegerType()) // from int.
3202 return CE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3205 } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) {
3206 // Ignore the ImplicitCastExpr type entirely.
3207 return ICE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3208 } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) {
3209 // Accept ((void*)0) as a null pointer constant, as many other
3210 // implementations do.
3211 return PE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3212 } else if (const GenericSelectionExpr *GE =
3213 dyn_cast<GenericSelectionExpr>(this)) {
3214 if (GE->isResultDependent())
3215 return NPCK_NotNull;
3216 return GE->getResultExpr()->isNullPointerConstant(Ctx, NPC);
3217 } else if (const ChooseExpr *CE = dyn_cast<ChooseExpr>(this)) {
3218 if (CE->isConditionDependent())
3219 return NPCK_NotNull;
3220 return CE->getChosenSubExpr()->isNullPointerConstant(Ctx, NPC);
3221 } else if (const CXXDefaultArgExpr *DefaultArg
3222 = dyn_cast<CXXDefaultArgExpr>(this)) {
3223 // See through default argument expressions.
3224 return DefaultArg->getExpr()->isNullPointerConstant(Ctx, NPC);
3225 } else if (const CXXDefaultInitExpr *DefaultInit
3226 = dyn_cast<CXXDefaultInitExpr>(this)) {
3227 // See through default initializer expressions.
3228 return DefaultInit->getExpr()->isNullPointerConstant(Ctx, NPC);
3229 } else if (isa<GNUNullExpr>(this)) {
3230 // The GNU __null extension is always a null pointer constant.
3231 return NPCK_GNUNull;
3232 } else if (const MaterializeTemporaryExpr *M
3233 = dyn_cast<MaterializeTemporaryExpr>(this)) {
3234 return M->GetTemporaryExpr()->isNullPointerConstant(Ctx, NPC);
3235 } else if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(this)) {
3236 if (const Expr *Source = OVE->getSourceExpr())
3237 return Source->isNullPointerConstant(Ctx, NPC);
3240 // C++11 nullptr_t is always a null pointer constant.
3241 if (getType()->isNullPtrType())
3242 return NPCK_CXX11_nullptr;
3244 if (const RecordType *UT = getType()->getAsUnionType())
3245 if (!Ctx.getLangOpts().CPlusPlus11 &&
3246 UT && UT->getDecl()->hasAttr<TransparentUnionAttr>())
3247 if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(this)){
3248 const Expr *InitExpr = CLE->getInitializer();
3249 if (const InitListExpr *ILE = dyn_cast<InitListExpr>(InitExpr))
3250 return ILE->getInit(0)->isNullPointerConstant(Ctx, NPC);
3252 // This expression must be an integer type.
3253 if (!getType()->isIntegerType() ||
3254 (Ctx.getLangOpts().CPlusPlus && getType()->isEnumeralType()))
3255 return NPCK_NotNull;
3257 if (Ctx.getLangOpts().CPlusPlus11) {
3258 // C++11 [conv.ptr]p1: A null pointer constant is an integer literal with
3259 // value zero or a prvalue of type std::nullptr_t.
3260 // Microsoft mode permits C++98 rules reflecting MSVC behavior.
3261 const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(this);
3262 if (Lit && !Lit->getValue())
3263 return NPCK_ZeroLiteral;
3264 else if (!Ctx.getLangOpts().MSVCCompat || !isCXX98IntegralConstantExpr(Ctx))
3265 return NPCK_NotNull;
3267 // If we have an integer constant expression, we need to *evaluate* it and
3268 // test for the value 0.
3269 if (!isIntegerConstantExpr(Ctx))
3270 return NPCK_NotNull;
3273 if (EvaluateKnownConstInt(Ctx) != 0)
3274 return NPCK_NotNull;
3276 if (isa<IntegerLiteral>(this))
3277 return NPCK_ZeroLiteral;
3278 return NPCK_ZeroExpression;
3281 /// \brief If this expression is an l-value for an Objective C
3282 /// property, find the underlying property reference expression.
3283 const ObjCPropertyRefExpr *Expr::getObjCProperty() const {
3284 const Expr *E = this;
3286 assert((E->getValueKind() == VK_LValue &&
3287 E->getObjectKind() == OK_ObjCProperty) &&
3288 "expression is not a property reference");
3289 E = E->IgnoreParenCasts();
3290 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
3291 if (BO->getOpcode() == BO_Comma) {
3300 return cast<ObjCPropertyRefExpr>(E);
3303 bool Expr::isObjCSelfExpr() const {
3304 const Expr *E = IgnoreParenImpCasts();
3306 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E);
3310 const ImplicitParamDecl *Param = dyn_cast<ImplicitParamDecl>(DRE->getDecl());
3314 const ObjCMethodDecl *M = dyn_cast<ObjCMethodDecl>(Param->getDeclContext());
3318 return M->getSelfDecl() == Param;
3321 FieldDecl *Expr::getSourceBitField() {
3322 Expr *E = this->IgnoreParens();
3324 while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3325 if (ICE->getCastKind() == CK_LValueToRValue ||
3326 (ICE->getValueKind() != VK_RValue && ICE->getCastKind() == CK_NoOp))
3327 E = ICE->getSubExpr()->IgnoreParens();
3332 if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E))
3333 if (FieldDecl *Field = dyn_cast<FieldDecl>(MemRef->getMemberDecl()))
3334 if (Field->isBitField())
3337 if (ObjCIvarRefExpr *IvarRef = dyn_cast<ObjCIvarRefExpr>(E))
3338 if (FieldDecl *Ivar = dyn_cast<FieldDecl>(IvarRef->getDecl()))
3339 if (Ivar->isBitField())
3342 if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E)) {
3343 if (FieldDecl *Field = dyn_cast<FieldDecl>(DeclRef->getDecl()))
3344 if (Field->isBitField())
3347 if (BindingDecl *BD = dyn_cast<BindingDecl>(DeclRef->getDecl()))
3348 if (Expr *E = BD->getBinding())
3349 return E->getSourceBitField();
3352 if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(E)) {
3353 if (BinOp->isAssignmentOp() && BinOp->getLHS())
3354 return BinOp->getLHS()->getSourceBitField();
3356 if (BinOp->getOpcode() == BO_Comma && BinOp->getRHS())
3357 return BinOp->getRHS()->getSourceBitField();
3360 if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(E))
3361 if (UnOp->isPrefix() && UnOp->isIncrementDecrementOp())
3362 return UnOp->getSubExpr()->getSourceBitField();
3367 bool Expr::refersToVectorElement() const {
3368 // FIXME: Why do we not just look at the ObjectKind here?
3369 const Expr *E = this->IgnoreParens();
3371 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3372 if (ICE->getValueKind() != VK_RValue &&
3373 ICE->getCastKind() == CK_NoOp)
3374 E = ICE->getSubExpr()->IgnoreParens();
3379 if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E))
3380 return ASE->getBase()->getType()->isVectorType();
3382 if (isa<ExtVectorElementExpr>(E))
3385 if (auto *DRE = dyn_cast<DeclRefExpr>(E))
3386 if (auto *BD = dyn_cast<BindingDecl>(DRE->getDecl()))
3387 if (auto *E = BD->getBinding())
3388 return E->refersToVectorElement();
3393 bool Expr::refersToGlobalRegisterVar() const {
3394 const Expr *E = this->IgnoreParenImpCasts();
3396 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
3397 if (const auto *VD = dyn_cast<VarDecl>(DRE->getDecl()))
3398 if (VD->getStorageClass() == SC_Register &&
3399 VD->hasAttr<AsmLabelAttr>() && !VD->isLocalVarDecl())
3405 /// isArrow - Return true if the base expression is a pointer to vector,
3406 /// return false if the base expression is a vector.
3407 bool ExtVectorElementExpr::isArrow() const {
3408 return getBase()->getType()->isPointerType();
3411 unsigned ExtVectorElementExpr::getNumElements() const {
3412 if (const VectorType *VT = getType()->getAs<VectorType>())
3413 return VT->getNumElements();
3417 /// containsDuplicateElements - Return true if any element access is repeated.
3418 bool ExtVectorElementExpr::containsDuplicateElements() const {
3419 // FIXME: Refactor this code to an accessor on the AST node which returns the
3420 // "type" of component access, and share with code below and in Sema.
3421 StringRef Comp = Accessor->getName();
3423 // Halving swizzles do not contain duplicate elements.
3424 if (Comp == "hi" || Comp == "lo" || Comp == "even" || Comp == "odd")
3427 // Advance past s-char prefix on hex swizzles.
3428 if (Comp[0] == 's' || Comp[0] == 'S')
3429 Comp = Comp.substr(1);
3431 for (unsigned i = 0, e = Comp.size(); i != e; ++i)
3432 if (Comp.substr(i + 1).find(Comp[i]) != StringRef::npos)
3438 /// getEncodedElementAccess - We encode the fields as a llvm ConstantArray.
3439 void ExtVectorElementExpr::getEncodedElementAccess(
3440 SmallVectorImpl<uint32_t> &Elts) const {
3441 StringRef Comp = Accessor->getName();
3442 bool isNumericAccessor = false;
3443 if (Comp[0] == 's' || Comp[0] == 'S') {
3444 Comp = Comp.substr(1);
3445 isNumericAccessor = true;
3448 bool isHi = Comp == "hi";
3449 bool isLo = Comp == "lo";
3450 bool isEven = Comp == "even";
3451 bool isOdd = Comp == "odd";
3453 for (unsigned i = 0, e = getNumElements(); i != e; ++i) {
3465 Index = ExtVectorType::getAccessorIdx(Comp[i], isNumericAccessor);
3467 Elts.push_back(Index);
3471 ShuffleVectorExpr::ShuffleVectorExpr(const ASTContext &C, ArrayRef<Expr*> args,
3472 QualType Type, SourceLocation BLoc,
3474 : Expr(ShuffleVectorExprClass, Type, VK_RValue, OK_Ordinary,
3475 Type->isDependentType(), Type->isDependentType(),
3476 Type->isInstantiationDependentType(),
3477 Type->containsUnexpandedParameterPack()),
3478 BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(args.size())
3480 SubExprs = new (C) Stmt*[args.size()];
3481 for (unsigned i = 0; i != args.size(); i++) {
3482 if (args[i]->isTypeDependent())
3483 ExprBits.TypeDependent = true;
3484 if (args[i]->isValueDependent())
3485 ExprBits.ValueDependent = true;
3486 if (args[i]->isInstantiationDependent())
3487 ExprBits.InstantiationDependent = true;
3488 if (args[i]->containsUnexpandedParameterPack())
3489 ExprBits.ContainsUnexpandedParameterPack = true;
3491 SubExprs[i] = args[i];
3495 void ShuffleVectorExpr::setExprs(const ASTContext &C, ArrayRef<Expr *> Exprs) {
3496 if (SubExprs) C.Deallocate(SubExprs);
3498 this->NumExprs = Exprs.size();
3499 SubExprs = new (C) Stmt*[NumExprs];
3500 memcpy(SubExprs, Exprs.data(), sizeof(Expr *) * Exprs.size());
3503 GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
3504 SourceLocation GenericLoc, Expr *ControllingExpr,
3505 ArrayRef<TypeSourceInfo*> AssocTypes,
3506 ArrayRef<Expr*> AssocExprs,
3507 SourceLocation DefaultLoc,
3508 SourceLocation RParenLoc,
3509 bool ContainsUnexpandedParameterPack,
3510 unsigned ResultIndex)
3511 : Expr(GenericSelectionExprClass,
3512 AssocExprs[ResultIndex]->getType(),
3513 AssocExprs[ResultIndex]->getValueKind(),
3514 AssocExprs[ResultIndex]->getObjectKind(),
3515 AssocExprs[ResultIndex]->isTypeDependent(),
3516 AssocExprs[ResultIndex]->isValueDependent(),
3517 AssocExprs[ResultIndex]->isInstantiationDependent(),
3518 ContainsUnexpandedParameterPack),
3519 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3520 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3521 NumAssocs(AssocExprs.size()), ResultIndex(ResultIndex),
3522 GenericLoc(GenericLoc), DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3523 SubExprs[CONTROLLING] = ControllingExpr;
3524 assert(AssocTypes.size() == AssocExprs.size());
3525 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3526 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3529 GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
3530 SourceLocation GenericLoc, Expr *ControllingExpr,
3531 ArrayRef<TypeSourceInfo*> AssocTypes,
3532 ArrayRef<Expr*> AssocExprs,
3533 SourceLocation DefaultLoc,
3534 SourceLocation RParenLoc,
3535 bool ContainsUnexpandedParameterPack)
3536 : Expr(GenericSelectionExprClass,
3537 Context.DependentTy,
3540 /*isTypeDependent=*/true,
3541 /*isValueDependent=*/true,
3542 /*isInstantiationDependent=*/true,
3543 ContainsUnexpandedParameterPack),
3544 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3545 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3546 NumAssocs(AssocExprs.size()), ResultIndex(-1U), GenericLoc(GenericLoc),
3547 DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3548 SubExprs[CONTROLLING] = ControllingExpr;
3549 assert(AssocTypes.size() == AssocExprs.size());
3550 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3551 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3554 //===----------------------------------------------------------------------===//
3555 // DesignatedInitExpr
3556 //===----------------------------------------------------------------------===//
3558 IdentifierInfo *DesignatedInitExpr::Designator::getFieldName() const {
3559 assert(Kind == FieldDesignator && "Only valid on a field designator");
3560 if (Field.NameOrField & 0x01)
3561 return reinterpret_cast<IdentifierInfo *>(Field.NameOrField&~0x01);
3563 return getField()->getIdentifier();
3566 DesignatedInitExpr::DesignatedInitExpr(const ASTContext &C, QualType Ty,
3567 llvm::ArrayRef<Designator> Designators,
3568 SourceLocation EqualOrColonLoc,
3570 ArrayRef<Expr*> IndexExprs,
3572 : Expr(DesignatedInitExprClass, Ty,
3573 Init->getValueKind(), Init->getObjectKind(),
3574 Init->isTypeDependent(), Init->isValueDependent(),
3575 Init->isInstantiationDependent(),
3576 Init->containsUnexpandedParameterPack()),
3577 EqualOrColonLoc(EqualOrColonLoc), GNUSyntax(GNUSyntax),
3578 NumDesignators(Designators.size()), NumSubExprs(IndexExprs.size() + 1) {
3579 this->Designators = new (C) Designator[NumDesignators];
3581 // Record the initializer itself.
3582 child_iterator Child = child_begin();
3585 // Copy the designators and their subexpressions, computing
3586 // value-dependence along the way.
3587 unsigned IndexIdx = 0;
3588 for (unsigned I = 0; I != NumDesignators; ++I) {
3589 this->Designators[I] = Designators[I];
3591 if (this->Designators[I].isArrayDesignator()) {
3592 // Compute type- and value-dependence.
3593 Expr *Index = IndexExprs[IndexIdx];
3594 if (Index->isTypeDependent() || Index->isValueDependent())
3595 ExprBits.TypeDependent = ExprBits.ValueDependent = true;
3596 if (Index->isInstantiationDependent())
3597 ExprBits.InstantiationDependent = true;
3598 // Propagate unexpanded parameter packs.
3599 if (Index->containsUnexpandedParameterPack())
3600 ExprBits.ContainsUnexpandedParameterPack = true;
3602 // Copy the index expressions into permanent storage.
3603 *Child++ = IndexExprs[IndexIdx++];
3604 } else if (this->Designators[I].isArrayRangeDesignator()) {
3605 // Compute type- and value-dependence.
3606 Expr *Start = IndexExprs[IndexIdx];
3607 Expr *End = IndexExprs[IndexIdx + 1];
3608 if (Start->isTypeDependent() || Start->isValueDependent() ||
3609 End->isTypeDependent() || End->isValueDependent()) {
3610 ExprBits.TypeDependent = ExprBits.ValueDependent = true;
3611 ExprBits.InstantiationDependent = true;
3612 } else if (Start->isInstantiationDependent() ||
3613 End->isInstantiationDependent()) {
3614 ExprBits.InstantiationDependent = true;
3617 // Propagate unexpanded parameter packs.
3618 if (Start->containsUnexpandedParameterPack() ||
3619 End->containsUnexpandedParameterPack())
3620 ExprBits.ContainsUnexpandedParameterPack = true;
3622 // Copy the start/end expressions into permanent storage.
3623 *Child++ = IndexExprs[IndexIdx++];
3624 *Child++ = IndexExprs[IndexIdx++];
3628 assert(IndexIdx == IndexExprs.size() && "Wrong number of index expressions");
3631 DesignatedInitExpr *
3632 DesignatedInitExpr::Create(const ASTContext &C,
3633 llvm::ArrayRef<Designator> Designators,
3634 ArrayRef<Expr*> IndexExprs,
3635 SourceLocation ColonOrEqualLoc,
3636 bool UsesColonSyntax, Expr *Init) {
3637 void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(IndexExprs.size() + 1),
3638 alignof(DesignatedInitExpr));
3639 return new (Mem) DesignatedInitExpr(C, C.VoidTy, Designators,
3640 ColonOrEqualLoc, UsesColonSyntax,
3644 DesignatedInitExpr *DesignatedInitExpr::CreateEmpty(const ASTContext &C,
3645 unsigned NumIndexExprs) {
3646 void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(NumIndexExprs + 1),
3647 alignof(DesignatedInitExpr));
3648 return new (Mem) DesignatedInitExpr(NumIndexExprs + 1);
3651 void DesignatedInitExpr::setDesignators(const ASTContext &C,
3652 const Designator *Desigs,
3653 unsigned NumDesigs) {
3654 Designators = new (C) Designator[NumDesigs];
3655 NumDesignators = NumDesigs;
3656 for (unsigned I = 0; I != NumDesigs; ++I)
3657 Designators[I] = Desigs[I];
3660 SourceRange DesignatedInitExpr::getDesignatorsSourceRange() const {
3661 DesignatedInitExpr *DIE = const_cast<DesignatedInitExpr*>(this);
3663 return DIE->getDesignator(0)->getSourceRange();
3664 return SourceRange(DIE->getDesignator(0)->getLocStart(),
3665 DIE->getDesignator(size()-1)->getLocEnd());
3668 SourceLocation DesignatedInitExpr::getLocStart() const {
3669 SourceLocation StartLoc;
3670 auto *DIE = const_cast<DesignatedInitExpr *>(this);
3671 Designator &First = *DIE->getDesignator(0);
3672 if (First.isFieldDesignator()) {
3674 StartLoc = SourceLocation::getFromRawEncoding(First.Field.FieldLoc);
3676 StartLoc = SourceLocation::getFromRawEncoding(First.Field.DotLoc);
3679 SourceLocation::getFromRawEncoding(First.ArrayOrRange.LBracketLoc);
3683 SourceLocation DesignatedInitExpr::getLocEnd() const {
3684 return getInit()->getLocEnd();
3687 Expr *DesignatedInitExpr::getArrayIndex(const Designator& D) const {
3688 assert(D.Kind == Designator::ArrayDesignator && "Requires array designator");
3689 return getSubExpr(D.ArrayOrRange.Index + 1);
3692 Expr *DesignatedInitExpr::getArrayRangeStart(const Designator &D) const {
3693 assert(D.Kind == Designator::ArrayRangeDesignator &&
3694 "Requires array range designator");
3695 return getSubExpr(D.ArrayOrRange.Index + 1);
3698 Expr *DesignatedInitExpr::getArrayRangeEnd(const Designator &D) const {
3699 assert(D.Kind == Designator::ArrayRangeDesignator &&
3700 "Requires array range designator");
3701 return getSubExpr(D.ArrayOrRange.Index + 2);
3704 /// \brief Replaces the designator at index @p Idx with the series
3705 /// of designators in [First, Last).
3706 void DesignatedInitExpr::ExpandDesignator(const ASTContext &C, unsigned Idx,
3707 const Designator *First,
3708 const Designator *Last) {
3709 unsigned NumNewDesignators = Last - First;
3710 if (NumNewDesignators == 0) {
3711 std::copy_backward(Designators + Idx + 1,
3712 Designators + NumDesignators,
3714 --NumNewDesignators;
3716 } else if (NumNewDesignators == 1) {
3717 Designators[Idx] = *First;
3721 Designator *NewDesignators
3722 = new (C) Designator[NumDesignators - 1 + NumNewDesignators];
3723 std::copy(Designators, Designators + Idx, NewDesignators);
3724 std::copy(First, Last, NewDesignators + Idx);
3725 std::copy(Designators + Idx + 1, Designators + NumDesignators,
3726 NewDesignators + Idx + NumNewDesignators);
3727 Designators = NewDesignators;
3728 NumDesignators = NumDesignators - 1 + NumNewDesignators;
3731 DesignatedInitUpdateExpr::DesignatedInitUpdateExpr(const ASTContext &C,
3732 SourceLocation lBraceLoc, Expr *baseExpr, SourceLocation rBraceLoc)
3733 : Expr(DesignatedInitUpdateExprClass, baseExpr->getType(), VK_RValue,
3734 OK_Ordinary, false, false, false, false) {
3735 BaseAndUpdaterExprs[0] = baseExpr;
3737 InitListExpr *ILE = new (C) InitListExpr(C, lBraceLoc, None, rBraceLoc);
3738 ILE->setType(baseExpr->getType());
3739 BaseAndUpdaterExprs[1] = ILE;
3742 SourceLocation DesignatedInitUpdateExpr::getLocStart() const {
3743 return getBase()->getLocStart();
3746 SourceLocation DesignatedInitUpdateExpr::getLocEnd() const {
3747 return getBase()->getLocEnd();
3750 ParenListExpr::ParenListExpr(const ASTContext& C, SourceLocation lparenloc,
3751 ArrayRef<Expr*> exprs,
3752 SourceLocation rparenloc)
3753 : Expr(ParenListExprClass, QualType(), VK_RValue, OK_Ordinary,
3754 false, false, false, false),
3755 NumExprs(exprs.size()), LParenLoc(lparenloc), RParenLoc(rparenloc) {
3756 Exprs = new (C) Stmt*[exprs.size()];
3757 for (unsigned i = 0; i != exprs.size(); ++i) {
3758 if (exprs[i]->isTypeDependent())
3759 ExprBits.TypeDependent = true;
3760 if (exprs[i]->isValueDependent())
3761 ExprBits.ValueDependent = true;
3762 if (exprs[i]->isInstantiationDependent())
3763 ExprBits.InstantiationDependent = true;
3764 if (exprs[i]->containsUnexpandedParameterPack())
3765 ExprBits.ContainsUnexpandedParameterPack = true;
3767 Exprs[i] = exprs[i];
3771 const OpaqueValueExpr *OpaqueValueExpr::findInCopyConstruct(const Expr *e) {
3772 if (const ExprWithCleanups *ewc = dyn_cast<ExprWithCleanups>(e))
3773 e = ewc->getSubExpr();
3774 if (const MaterializeTemporaryExpr *m = dyn_cast<MaterializeTemporaryExpr>(e))
3775 e = m->GetTemporaryExpr();
3776 e = cast<CXXConstructExpr>(e)->getArg(0);
3777 while (const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(e))
3778 e = ice->getSubExpr();
3779 return cast<OpaqueValueExpr>(e);
3782 PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &Context,
3784 unsigned numSemanticExprs) {
3786 Context.Allocate(totalSizeToAlloc<Expr *>(1 + numSemanticExprs),
3787 alignof(PseudoObjectExpr));
3788 return new(buffer) PseudoObjectExpr(sh, numSemanticExprs);
3791 PseudoObjectExpr::PseudoObjectExpr(EmptyShell shell, unsigned numSemanticExprs)
3792 : Expr(PseudoObjectExprClass, shell) {
3793 PseudoObjectExprBits.NumSubExprs = numSemanticExprs + 1;
3796 PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &C, Expr *syntax,
3797 ArrayRef<Expr*> semantics,
3798 unsigned resultIndex) {
3799 assert(syntax && "no syntactic expression!");
3800 assert(semantics.size() && "no semantic expressions!");
3804 if (resultIndex == NoResult) {
3808 assert(resultIndex < semantics.size());
3809 type = semantics[resultIndex]->getType();
3810 VK = semantics[resultIndex]->getValueKind();
3811 assert(semantics[resultIndex]->getObjectKind() == OK_Ordinary);
3814 void *buffer = C.Allocate(totalSizeToAlloc<Expr *>(semantics.size() + 1),
3815 alignof(PseudoObjectExpr));
3816 return new(buffer) PseudoObjectExpr(type, VK, syntax, semantics,
3820 PseudoObjectExpr::PseudoObjectExpr(QualType type, ExprValueKind VK,
3821 Expr *syntax, ArrayRef<Expr*> semantics,
3822 unsigned resultIndex)
3823 : Expr(PseudoObjectExprClass, type, VK, OK_Ordinary,
3824 /*filled in at end of ctor*/ false, false, false, false) {
3825 PseudoObjectExprBits.NumSubExprs = semantics.size() + 1;
3826 PseudoObjectExprBits.ResultIndex = resultIndex + 1;
3828 for (unsigned i = 0, e = semantics.size() + 1; i != e; ++i) {
3829 Expr *E = (i == 0 ? syntax : semantics[i-1]);
3830 getSubExprsBuffer()[i] = E;
3832 if (E->isTypeDependent())
3833 ExprBits.TypeDependent = true;
3834 if (E->isValueDependent())
3835 ExprBits.ValueDependent = true;
3836 if (E->isInstantiationDependent())
3837 ExprBits.InstantiationDependent = true;
3838 if (E->containsUnexpandedParameterPack())
3839 ExprBits.ContainsUnexpandedParameterPack = true;
3841 if (isa<OpaqueValueExpr>(E))
3842 assert(cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr &&
3843 "opaque-value semantic expressions for pseudo-object "
3844 "operations must have sources");
3848 //===----------------------------------------------------------------------===//
3849 // Child Iterators for iterating over subexpressions/substatements
3850 //===----------------------------------------------------------------------===//
3852 // UnaryExprOrTypeTraitExpr
3853 Stmt::child_range UnaryExprOrTypeTraitExpr::children() {
3854 // If this is of a type and the type is a VLA type (and not a typedef), the
3855 // size expression of the VLA needs to be treated as an executable expression.
3856 // Why isn't this weirdness documented better in StmtIterator?
3857 if (isArgumentType()) {
3858 if (const VariableArrayType* T = dyn_cast<VariableArrayType>(
3859 getArgumentType().getTypePtr()))
3860 return child_range(child_iterator(T), child_iterator());
3861 return child_range(child_iterator(), child_iterator());
3863 return child_range(&Argument.Ex, &Argument.Ex + 1);
3866 AtomicExpr::AtomicExpr(SourceLocation BLoc, ArrayRef<Expr*> args,
3867 QualType t, AtomicOp op, SourceLocation RP)
3868 : Expr(AtomicExprClass, t, VK_RValue, OK_Ordinary,
3869 false, false, false, false),
3870 NumSubExprs(args.size()), BuiltinLoc(BLoc), RParenLoc(RP), Op(op)
3872 assert(args.size() == getNumSubExprs(op) && "wrong number of subexpressions");
3873 for (unsigned i = 0; i != args.size(); i++) {
3874 if (args[i]->isTypeDependent())
3875 ExprBits.TypeDependent = true;
3876 if (args[i]->isValueDependent())
3877 ExprBits.ValueDependent = true;
3878 if (args[i]->isInstantiationDependent())
3879 ExprBits.InstantiationDependent = true;
3880 if (args[i]->containsUnexpandedParameterPack())
3881 ExprBits.ContainsUnexpandedParameterPack = true;
3883 SubExprs[i] = args[i];
3887 unsigned AtomicExpr::getNumSubExprs(AtomicOp Op) {
3889 case AO__c11_atomic_init:
3890 case AO__c11_atomic_load:
3891 case AO__atomic_load_n:
3894 case AO__c11_atomic_store:
3895 case AO__c11_atomic_exchange:
3896 case AO__atomic_load:
3897 case AO__atomic_store:
3898 case AO__atomic_store_n:
3899 case AO__atomic_exchange_n:
3900 case AO__c11_atomic_fetch_add:
3901 case AO__c11_atomic_fetch_sub:
3902 case AO__c11_atomic_fetch_and:
3903 case AO__c11_atomic_fetch_or:
3904 case AO__c11_atomic_fetch_xor:
3905 case AO__atomic_fetch_add:
3906 case AO__atomic_fetch_sub:
3907 case AO__atomic_fetch_and:
3908 case AO__atomic_fetch_or:
3909 case AO__atomic_fetch_xor:
3910 case AO__atomic_fetch_nand:
3911 case AO__atomic_add_fetch:
3912 case AO__atomic_sub_fetch:
3913 case AO__atomic_and_fetch:
3914 case AO__atomic_or_fetch:
3915 case AO__atomic_xor_fetch:
3916 case AO__atomic_nand_fetch:
3919 case AO__atomic_exchange:
3922 case AO__c11_atomic_compare_exchange_strong:
3923 case AO__c11_atomic_compare_exchange_weak:
3926 case AO__atomic_compare_exchange:
3927 case AO__atomic_compare_exchange_n:
3930 llvm_unreachable("unknown atomic op");
3933 QualType OMPArraySectionExpr::getBaseOriginalType(const Expr *Base) {
3934 unsigned ArraySectionCount = 0;
3935 while (auto *OASE = dyn_cast<OMPArraySectionExpr>(Base->IgnoreParens())) {
3936 Base = OASE->getBase();
3937 ++ArraySectionCount;
3940 dyn_cast<ArraySubscriptExpr>(Base->IgnoreParenImpCasts())) {
3941 Base = ASE->getBase();
3942 ++ArraySectionCount;
3944 Base = Base->IgnoreParenImpCasts();
3945 auto OriginalTy = Base->getType();
3946 if (auto *DRE = dyn_cast<DeclRefExpr>(Base))
3947 if (auto *PVD = dyn_cast<ParmVarDecl>(DRE->getDecl()))
3948 OriginalTy = PVD->getOriginalType().getNonReferenceType();
3950 for (unsigned Cnt = 0; Cnt < ArraySectionCount; ++Cnt) {
3951 if (OriginalTy->isAnyPointerType())
3952 OriginalTy = OriginalTy->getPointeeType();
3954 assert (OriginalTy->isArrayType());
3955 OriginalTy = OriginalTy->castAsArrayTypeUnsafe()->getElementType();