1 //===--- Expr.cpp - Expression AST Node Implementation --------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the Expr class and subclasses.
12 //===----------------------------------------------------------------------===//
14 #include "clang/AST/ASTContext.h"
15 #include "clang/AST/Attr.h"
16 #include "clang/AST/DeclCXX.h"
17 #include "clang/AST/DeclObjC.h"
18 #include "clang/AST/DeclTemplate.h"
19 #include "clang/AST/EvaluatedExprVisitor.h"
20 #include "clang/AST/Expr.h"
21 #include "clang/AST/ExprCXX.h"
22 #include "clang/AST/Mangle.h"
23 #include "clang/AST/RecordLayout.h"
24 #include "clang/AST/StmtVisitor.h"
25 #include "clang/Basic/Builtins.h"
26 #include "clang/Basic/CharInfo.h"
27 #include "clang/Basic/SourceManager.h"
28 #include "clang/Basic/TargetInfo.h"
29 #include "clang/Lex/Lexer.h"
30 #include "clang/Lex/LiteralSupport.h"
31 #include "clang/Sema/SemaDiagnostic.h"
32 #include "llvm/Support/ErrorHandling.h"
33 #include "llvm/Support/raw_ostream.h"
36 using namespace clang;
38 const Expr *Expr::getBestDynamicClassTypeExpr() const {
41 E = E->ignoreParenBaseCasts();
43 // Follow the RHS of a comma operator.
44 if (auto *BO = dyn_cast<BinaryOperator>(E)) {
45 if (BO->getOpcode() == BO_Comma) {
51 // Step into initializer for materialized temporaries.
52 if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E)) {
53 E = MTE->GetTemporaryExpr();
63 const CXXRecordDecl *Expr::getBestDynamicClassType() const {
64 const Expr *E = getBestDynamicClassTypeExpr();
65 QualType DerivedType = E->getType();
66 if (const PointerType *PTy = DerivedType->getAs<PointerType>())
67 DerivedType = PTy->getPointeeType();
69 if (DerivedType->isDependentType())
72 const RecordType *Ty = DerivedType->castAs<RecordType>();
73 Decl *D = Ty->getDecl();
74 return cast<CXXRecordDecl>(D);
77 const Expr *Expr::skipRValueSubobjectAdjustments(
78 SmallVectorImpl<const Expr *> &CommaLHSs,
79 SmallVectorImpl<SubobjectAdjustment> &Adjustments) const {
82 E = E->IgnoreParens();
84 if (const CastExpr *CE = dyn_cast<CastExpr>(E)) {
85 if ((CE->getCastKind() == CK_DerivedToBase ||
86 CE->getCastKind() == CK_UncheckedDerivedToBase) &&
87 E->getType()->isRecordType()) {
89 CXXRecordDecl *Derived
90 = cast<CXXRecordDecl>(E->getType()->getAs<RecordType>()->getDecl());
91 Adjustments.push_back(SubobjectAdjustment(CE, Derived));
95 if (CE->getCastKind() == CK_NoOp) {
99 } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) {
100 if (!ME->isArrow()) {
101 assert(ME->getBase()->getType()->isRecordType());
102 if (FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl())) {
103 if (!Field->isBitField() && !Field->getType()->isReferenceType()) {
105 Adjustments.push_back(SubobjectAdjustment(Field));
110 } else if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
111 if (BO->isPtrMemOp()) {
112 assert(BO->getRHS()->isRValue());
114 const MemberPointerType *MPT =
115 BO->getRHS()->getType()->getAs<MemberPointerType>();
116 Adjustments.push_back(SubobjectAdjustment(MPT, BO->getRHS()));
118 } else if (BO->getOpcode() == BO_Comma) {
119 CommaLHSs.push_back(BO->getLHS());
131 /// isKnownToHaveBooleanValue - Return true if this is an integer expression
132 /// that is known to return 0 or 1. This happens for _Bool/bool expressions
133 /// but also int expressions which are produced by things like comparisons in
135 bool Expr::isKnownToHaveBooleanValue() const {
136 const Expr *E = IgnoreParens();
138 // If this value has _Bool type, it is obvious 0/1.
139 if (E->getType()->isBooleanType()) return true;
140 // If this is a non-scalar-integer type, we don't care enough to try.
141 if (!E->getType()->isIntegralOrEnumerationType()) return false;
143 if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
144 switch (UO->getOpcode()) {
146 return UO->getSubExpr()->isKnownToHaveBooleanValue();
154 // Only look through implicit casts. If the user writes
155 // '(int) (a && b)' treat it as an arbitrary int.
156 if (const ImplicitCastExpr *CE = dyn_cast<ImplicitCastExpr>(E))
157 return CE->getSubExpr()->isKnownToHaveBooleanValue();
159 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
160 switch (BO->getOpcode()) {
161 default: return false;
162 case BO_LT: // Relational operators.
166 case BO_EQ: // Equality operators.
168 case BO_LAnd: // AND operator.
169 case BO_LOr: // Logical OR operator.
172 case BO_And: // Bitwise AND operator.
173 case BO_Xor: // Bitwise XOR operator.
174 case BO_Or: // Bitwise OR operator.
175 // Handle things like (x==2)|(y==12).
176 return BO->getLHS()->isKnownToHaveBooleanValue() &&
177 BO->getRHS()->isKnownToHaveBooleanValue();
181 return BO->getRHS()->isKnownToHaveBooleanValue();
185 if (const ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E))
186 return CO->getTrueExpr()->isKnownToHaveBooleanValue() &&
187 CO->getFalseExpr()->isKnownToHaveBooleanValue();
192 // Amusing macro metaprogramming hack: check whether a class provides
193 // a more specific implementation of getExprLoc().
195 // See also Stmt.cpp:{getLocStart(),getLocEnd()}.
197 /// This implementation is used when a class provides a custom
198 /// implementation of getExprLoc.
199 template <class E, class T>
200 SourceLocation getExprLocImpl(const Expr *expr,
201 SourceLocation (T::*v)() const) {
202 return static_cast<const E*>(expr)->getExprLoc();
205 /// This implementation is used when a class doesn't provide
206 /// a custom implementation of getExprLoc. Overload resolution
207 /// should pick it over the implementation above because it's
208 /// more specialized according to function template partial ordering.
210 SourceLocation getExprLocImpl(const Expr *expr,
211 SourceLocation (Expr::*v)() const) {
212 return static_cast<const E*>(expr)->getLocStart();
216 SourceLocation Expr::getExprLoc() const {
217 switch (getStmtClass()) {
218 case Stmt::NoStmtClass: llvm_unreachable("statement without class");
219 #define ABSTRACT_STMT(type)
220 #define STMT(type, base) \
221 case Stmt::type##Class: break;
222 #define EXPR(type, base) \
223 case Stmt::type##Class: return getExprLocImpl<type>(this, &type::getExprLoc);
224 #include "clang/AST/StmtNodes.inc"
226 llvm_unreachable("unknown expression kind");
229 //===----------------------------------------------------------------------===//
230 // Primary Expressions.
231 //===----------------------------------------------------------------------===//
233 /// \brief Compute the type-, value-, and instantiation-dependence of a
234 /// declaration reference
235 /// based on the declaration being referenced.
236 static void computeDeclRefDependence(const ASTContext &Ctx, NamedDecl *D,
237 QualType T, bool &TypeDependent,
238 bool &ValueDependent,
239 bool &InstantiationDependent) {
240 TypeDependent = false;
241 ValueDependent = false;
242 InstantiationDependent = false;
244 // (TD) C++ [temp.dep.expr]p3:
245 // An id-expression is type-dependent if it contains:
249 // (VD) C++ [temp.dep.constexpr]p2:
250 // An identifier is value-dependent if it is:
252 // (TD) - an identifier that was declared with dependent type
253 // (VD) - a name declared with a dependent type,
254 if (T->isDependentType()) {
255 TypeDependent = true;
256 ValueDependent = true;
257 InstantiationDependent = true;
259 } else if (T->isInstantiationDependentType()) {
260 InstantiationDependent = true;
263 // (TD) - a conversion-function-id that specifies a dependent type
264 if (D->getDeclName().getNameKind()
265 == DeclarationName::CXXConversionFunctionName) {
266 QualType T = D->getDeclName().getCXXNameType();
267 if (T->isDependentType()) {
268 TypeDependent = true;
269 ValueDependent = true;
270 InstantiationDependent = true;
274 if (T->isInstantiationDependentType())
275 InstantiationDependent = true;
278 // (VD) - the name of a non-type template parameter,
279 if (isa<NonTypeTemplateParmDecl>(D)) {
280 ValueDependent = true;
281 InstantiationDependent = true;
285 // (VD) - a constant with integral or enumeration type and is
286 // initialized with an expression that is value-dependent.
287 // (VD) - a constant with literal type and is initialized with an
288 // expression that is value-dependent [C++11].
289 // (VD) - FIXME: Missing from the standard:
290 // - an entity with reference type and is initialized with an
291 // expression that is value-dependent [C++11]
292 if (VarDecl *Var = dyn_cast<VarDecl>(D)) {
293 if ((Ctx.getLangOpts().CPlusPlus11 ?
294 Var->getType()->isLiteralType(Ctx) :
295 Var->getType()->isIntegralOrEnumerationType()) &&
296 (Var->getType().isConstQualified() ||
297 Var->getType()->isReferenceType())) {
298 if (const Expr *Init = Var->getAnyInitializer())
299 if (Init->isValueDependent()) {
300 ValueDependent = true;
301 InstantiationDependent = true;
305 // (VD) - FIXME: Missing from the standard:
306 // - a member function or a static data member of the current
308 if (Var->isStaticDataMember() &&
309 Var->getDeclContext()->isDependentContext()) {
310 ValueDependent = true;
311 InstantiationDependent = true;
312 TypeSourceInfo *TInfo = Var->getFirstDecl()->getTypeSourceInfo();
313 if (TInfo->getType()->isIncompleteArrayType())
314 TypeDependent = true;
320 // (VD) - FIXME: Missing from the standard:
321 // - a member function or a static data member of the current
323 if (isa<CXXMethodDecl>(D) && D->getDeclContext()->isDependentContext()) {
324 ValueDependent = true;
325 InstantiationDependent = true;
329 void DeclRefExpr::computeDependence(const ASTContext &Ctx) {
330 bool TypeDependent = false;
331 bool ValueDependent = false;
332 bool InstantiationDependent = false;
333 computeDeclRefDependence(Ctx, getDecl(), getType(), TypeDependent,
334 ValueDependent, InstantiationDependent);
336 ExprBits.TypeDependent |= TypeDependent;
337 ExprBits.ValueDependent |= ValueDependent;
338 ExprBits.InstantiationDependent |= InstantiationDependent;
340 // Is the declaration a parameter pack?
341 if (getDecl()->isParameterPack())
342 ExprBits.ContainsUnexpandedParameterPack = true;
345 DeclRefExpr::DeclRefExpr(const ASTContext &Ctx,
346 NestedNameSpecifierLoc QualifierLoc,
347 SourceLocation TemplateKWLoc,
348 ValueDecl *D, bool RefersToEnclosingVariableOrCapture,
349 const DeclarationNameInfo &NameInfo,
351 const TemplateArgumentListInfo *TemplateArgs,
352 QualType T, ExprValueKind VK)
353 : Expr(DeclRefExprClass, T, VK, OK_Ordinary, false, false, false, false),
354 D(D), Loc(NameInfo.getLoc()), DNLoc(NameInfo.getInfo()) {
355 DeclRefExprBits.HasQualifier = QualifierLoc ? 1 : 0;
357 new (getTrailingObjects<NestedNameSpecifierLoc>())
358 NestedNameSpecifierLoc(QualifierLoc);
359 auto *NNS = QualifierLoc.getNestedNameSpecifier();
360 if (NNS->isInstantiationDependent())
361 ExprBits.InstantiationDependent = true;
362 if (NNS->containsUnexpandedParameterPack())
363 ExprBits.ContainsUnexpandedParameterPack = true;
365 DeclRefExprBits.HasFoundDecl = FoundD ? 1 : 0;
367 *getTrailingObjects<NamedDecl *>() = FoundD;
368 DeclRefExprBits.HasTemplateKWAndArgsInfo
369 = (TemplateArgs || TemplateKWLoc.isValid()) ? 1 : 0;
370 DeclRefExprBits.RefersToEnclosingVariableOrCapture =
371 RefersToEnclosingVariableOrCapture;
373 bool Dependent = false;
374 bool InstantiationDependent = false;
375 bool ContainsUnexpandedParameterPack = false;
376 getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
377 TemplateKWLoc, *TemplateArgs, getTrailingObjects<TemplateArgumentLoc>(),
378 Dependent, InstantiationDependent, ContainsUnexpandedParameterPack);
379 assert(!Dependent && "built a DeclRefExpr with dependent template args");
380 ExprBits.InstantiationDependent |= InstantiationDependent;
381 ExprBits.ContainsUnexpandedParameterPack |= ContainsUnexpandedParameterPack;
382 } else if (TemplateKWLoc.isValid()) {
383 getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
386 DeclRefExprBits.HadMultipleCandidates = 0;
388 computeDependence(Ctx);
391 DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
392 NestedNameSpecifierLoc QualifierLoc,
393 SourceLocation TemplateKWLoc,
395 bool RefersToEnclosingVariableOrCapture,
396 SourceLocation NameLoc,
400 const TemplateArgumentListInfo *TemplateArgs) {
401 return Create(Context, QualifierLoc, TemplateKWLoc, D,
402 RefersToEnclosingVariableOrCapture,
403 DeclarationNameInfo(D->getDeclName(), NameLoc),
404 T, VK, FoundD, TemplateArgs);
407 DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
408 NestedNameSpecifierLoc QualifierLoc,
409 SourceLocation TemplateKWLoc,
411 bool RefersToEnclosingVariableOrCapture,
412 const DeclarationNameInfo &NameInfo,
416 const TemplateArgumentListInfo *TemplateArgs) {
417 // Filter out cases where the found Decl is the same as the value refenenced.
421 bool HasTemplateKWAndArgsInfo = TemplateArgs || TemplateKWLoc.isValid();
423 totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *,
424 ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>(
425 QualifierLoc ? 1 : 0, FoundD ? 1 : 0,
426 HasTemplateKWAndArgsInfo ? 1 : 0,
427 TemplateArgs ? TemplateArgs->size() : 0);
429 void *Mem = Context.Allocate(Size, alignof(DeclRefExpr));
430 return new (Mem) DeclRefExpr(Context, QualifierLoc, TemplateKWLoc, D,
431 RefersToEnclosingVariableOrCapture,
432 NameInfo, FoundD, TemplateArgs, T, VK);
435 DeclRefExpr *DeclRefExpr::CreateEmpty(const ASTContext &Context,
438 bool HasTemplateKWAndArgsInfo,
439 unsigned NumTemplateArgs) {
440 assert(NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo);
442 totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *,
443 ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>(
444 HasQualifier ? 1 : 0, HasFoundDecl ? 1 : 0, HasTemplateKWAndArgsInfo,
446 void *Mem = Context.Allocate(Size, alignof(DeclRefExpr));
447 return new (Mem) DeclRefExpr(EmptyShell());
450 SourceLocation DeclRefExpr::getLocStart() const {
452 return getQualifierLoc().getBeginLoc();
453 return getNameInfo().getLocStart();
455 SourceLocation DeclRefExpr::getLocEnd() const {
456 if (hasExplicitTemplateArgs())
457 return getRAngleLoc();
458 return getNameInfo().getLocEnd();
461 PredefinedExpr::PredefinedExpr(SourceLocation L, QualType FNTy, IdentType IT,
463 : Expr(PredefinedExprClass, FNTy, VK_LValue, OK_Ordinary,
464 FNTy->isDependentType(), FNTy->isDependentType(),
465 FNTy->isInstantiationDependentType(),
466 /*ContainsUnexpandedParameterPack=*/false),
467 Loc(L), Type(IT), FnName(SL) {}
469 StringLiteral *PredefinedExpr::getFunctionName() {
470 return cast_or_null<StringLiteral>(FnName);
473 StringRef PredefinedExpr::getIdentTypeName(PredefinedExpr::IdentType IT) {
478 return "__FUNCTION__";
480 return "__FUNCDNAME__";
482 return "L__FUNCTION__";
484 return "__PRETTY_FUNCTION__";
486 return "__FUNCSIG__";
487 case PrettyFunctionNoVirtual:
490 llvm_unreachable("Unknown ident type for PredefinedExpr");
493 // FIXME: Maybe this should use DeclPrinter with a special "print predefined
494 // expr" policy instead.
495 std::string PredefinedExpr::ComputeName(IdentType IT, const Decl *CurrentDecl) {
496 ASTContext &Context = CurrentDecl->getASTContext();
498 if (IT == PredefinedExpr::FuncDName) {
499 if (const NamedDecl *ND = dyn_cast<NamedDecl>(CurrentDecl)) {
500 std::unique_ptr<MangleContext> MC;
501 MC.reset(Context.createMangleContext());
503 if (MC->shouldMangleDeclName(ND)) {
504 SmallString<256> Buffer;
505 llvm::raw_svector_ostream Out(Buffer);
506 if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(ND))
507 MC->mangleCXXCtor(CD, Ctor_Base, Out);
508 else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(ND))
509 MC->mangleCXXDtor(DD, Dtor_Base, Out);
511 MC->mangleName(ND, Out);
513 if (!Buffer.empty() && Buffer.front() == '\01')
514 return Buffer.substr(1);
517 return ND->getIdentifier()->getName();
521 if (isa<BlockDecl>(CurrentDecl)) {
522 // For blocks we only emit something if it is enclosed in a function
523 // For top-level block we'd like to include the name of variable, but we
524 // don't have it at this point.
525 auto DC = CurrentDecl->getDeclContext();
526 if (DC->isFileContext())
529 SmallString<256> Buffer;
530 llvm::raw_svector_ostream Out(Buffer);
531 if (auto *DCBlock = dyn_cast<BlockDecl>(DC))
532 // For nested blocks, propagate up to the parent.
533 Out << ComputeName(IT, DCBlock);
534 else if (auto *DCDecl = dyn_cast<Decl>(DC))
535 Out << ComputeName(IT, DCDecl) << "_block_invoke";
538 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(CurrentDecl)) {
539 if (IT != PrettyFunction && IT != PrettyFunctionNoVirtual && IT != FuncSig)
540 return FD->getNameAsString();
542 SmallString<256> Name;
543 llvm::raw_svector_ostream Out(Name);
545 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
546 if (MD->isVirtual() && IT != PrettyFunctionNoVirtual)
552 PrintingPolicy Policy(Context.getLangOpts());
554 llvm::raw_string_ostream POut(Proto);
556 const FunctionDecl *Decl = FD;
557 if (const FunctionDecl* Pattern = FD->getTemplateInstantiationPattern())
559 const FunctionType *AFT = Decl->getType()->getAs<FunctionType>();
560 const FunctionProtoType *FT = nullptr;
561 if (FD->hasWrittenPrototype())
562 FT = dyn_cast<FunctionProtoType>(AFT);
565 switch (AFT->getCallConv()) {
566 case CC_C: POut << "__cdecl "; break;
567 case CC_X86StdCall: POut << "__stdcall "; break;
568 case CC_X86FastCall: POut << "__fastcall "; break;
569 case CC_X86ThisCall: POut << "__thiscall "; break;
570 case CC_X86VectorCall: POut << "__vectorcall "; break;
571 case CC_X86RegCall: POut << "__regcall "; break;
572 // Only bother printing the conventions that MSVC knows about.
577 FD->printQualifiedName(POut, Policy);
581 for (unsigned i = 0, e = Decl->getNumParams(); i != e; ++i) {
583 POut << Decl->getParamDecl(i)->getType().stream(Policy);
586 if (FT->isVariadic()) {
587 if (FD->getNumParams()) POut << ", ";
589 } else if ((IT == FuncSig || !Context.getLangOpts().CPlusPlus) &&
590 !Decl->getNumParams()) {
596 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
597 assert(FT && "We must have a written prototype in this case.");
600 if (FT->isVolatile())
602 RefQualifierKind Ref = MD->getRefQualifier();
603 if (Ref == RQ_LValue)
605 else if (Ref == RQ_RValue)
609 typedef SmallVector<const ClassTemplateSpecializationDecl *, 8> SpecsTy;
611 const DeclContext *Ctx = FD->getDeclContext();
612 while (Ctx && isa<NamedDecl>(Ctx)) {
613 const ClassTemplateSpecializationDecl *Spec
614 = dyn_cast<ClassTemplateSpecializationDecl>(Ctx);
615 if (Spec && !Spec->isExplicitSpecialization())
616 Specs.push_back(Spec);
617 Ctx = Ctx->getParent();
620 std::string TemplateParams;
621 llvm::raw_string_ostream TOut(TemplateParams);
622 for (SpecsTy::reverse_iterator I = Specs.rbegin(), E = Specs.rend();
624 const TemplateParameterList *Params
625 = (*I)->getSpecializedTemplate()->getTemplateParameters();
626 const TemplateArgumentList &Args = (*I)->getTemplateArgs();
627 assert(Params->size() == Args.size());
628 for (unsigned i = 0, numParams = Params->size(); i != numParams; ++i) {
629 StringRef Param = Params->getParam(i)->getName();
630 if (Param.empty()) continue;
631 TOut << Param << " = ";
632 Args.get(i).print(Policy, TOut);
637 FunctionTemplateSpecializationInfo *FSI
638 = FD->getTemplateSpecializationInfo();
639 if (FSI && !FSI->isExplicitSpecialization()) {
640 const TemplateParameterList* Params
641 = FSI->getTemplate()->getTemplateParameters();
642 const TemplateArgumentList* Args = FSI->TemplateArguments;
643 assert(Params->size() == Args->size());
644 for (unsigned i = 0, e = Params->size(); i != e; ++i) {
645 StringRef Param = Params->getParam(i)->getName();
646 if (Param.empty()) continue;
647 TOut << Param << " = ";
648 Args->get(i).print(Policy, TOut);
654 if (!TemplateParams.empty()) {
655 // remove the trailing comma and space
656 TemplateParams.resize(TemplateParams.size() - 2);
657 POut << " [" << TemplateParams << "]";
662 // Print "auto" for all deduced return types. This includes C++1y return
663 // type deduction and lambdas. For trailing return types resolve the
664 // decltype expression. Otherwise print the real type when this is
665 // not a constructor or destructor.
666 if (isa<CXXMethodDecl>(FD) &&
667 cast<CXXMethodDecl>(FD)->getParent()->isLambda())
668 Proto = "auto " + Proto;
669 else if (FT && FT->getReturnType()->getAs<DecltypeType>())
671 ->getAs<DecltypeType>()
672 ->getUnderlyingType()
673 .getAsStringInternal(Proto, Policy);
674 else if (!isa<CXXConstructorDecl>(FD) && !isa<CXXDestructorDecl>(FD))
675 AFT->getReturnType().getAsStringInternal(Proto, Policy);
679 return Name.str().str();
681 if (const CapturedDecl *CD = dyn_cast<CapturedDecl>(CurrentDecl)) {
682 for (const DeclContext *DC = CD->getParent(); DC; DC = DC->getParent())
683 // Skip to its enclosing function or method, but not its enclosing
685 if (DC->isFunctionOrMethod() && (DC->getDeclKind() != Decl::Captured)) {
686 const Decl *D = Decl::castFromDeclContext(DC);
687 return ComputeName(IT, D);
689 llvm_unreachable("CapturedDecl not inside a function or method");
691 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(CurrentDecl)) {
692 SmallString<256> Name;
693 llvm::raw_svector_ostream Out(Name);
694 Out << (MD->isInstanceMethod() ? '-' : '+');
697 // For incorrect code, there might not be an ObjCInterfaceDecl. Do
698 // a null check to avoid a crash.
699 if (const ObjCInterfaceDecl *ID = MD->getClassInterface())
702 if (const ObjCCategoryImplDecl *CID =
703 dyn_cast<ObjCCategoryImplDecl>(MD->getDeclContext()))
704 Out << '(' << *CID << ')';
707 MD->getSelector().print(Out);
710 return Name.str().str();
712 if (isa<TranslationUnitDecl>(CurrentDecl) && IT == PrettyFunction) {
713 // __PRETTY_FUNCTION__ -> "top level", the others produce an empty string.
719 void APNumericStorage::setIntValue(const ASTContext &C,
720 const llvm::APInt &Val) {
724 BitWidth = Val.getBitWidth();
725 unsigned NumWords = Val.getNumWords();
726 const uint64_t* Words = Val.getRawData();
728 pVal = new (C) uint64_t[NumWords];
729 std::copy(Words, Words + NumWords, pVal);
730 } else if (NumWords == 1)
736 IntegerLiteral::IntegerLiteral(const ASTContext &C, const llvm::APInt &V,
737 QualType type, SourceLocation l)
738 : Expr(IntegerLiteralClass, type, VK_RValue, OK_Ordinary, false, false,
741 assert(type->isIntegerType() && "Illegal type in IntegerLiteral");
742 assert(V.getBitWidth() == C.getIntWidth(type) &&
743 "Integer type is not the correct size for constant.");
748 IntegerLiteral::Create(const ASTContext &C, const llvm::APInt &V,
749 QualType type, SourceLocation l) {
750 return new (C) IntegerLiteral(C, V, type, l);
754 IntegerLiteral::Create(const ASTContext &C, EmptyShell Empty) {
755 return new (C) IntegerLiteral(Empty);
758 FloatingLiteral::FloatingLiteral(const ASTContext &C, const llvm::APFloat &V,
759 bool isexact, QualType Type, SourceLocation L)
760 : Expr(FloatingLiteralClass, Type, VK_RValue, OK_Ordinary, false, false,
761 false, false), Loc(L) {
762 setSemantics(V.getSemantics());
763 FloatingLiteralBits.IsExact = isexact;
767 FloatingLiteral::FloatingLiteral(const ASTContext &C, EmptyShell Empty)
768 : Expr(FloatingLiteralClass, Empty) {
769 setRawSemantics(IEEEhalf);
770 FloatingLiteralBits.IsExact = false;
774 FloatingLiteral::Create(const ASTContext &C, const llvm::APFloat &V,
775 bool isexact, QualType Type, SourceLocation L) {
776 return new (C) FloatingLiteral(C, V, isexact, Type, L);
780 FloatingLiteral::Create(const ASTContext &C, EmptyShell Empty) {
781 return new (C) FloatingLiteral(C, Empty);
784 const llvm::fltSemantics &FloatingLiteral::getSemantics() const {
785 switch(FloatingLiteralBits.Semantics) {
787 return llvm::APFloat::IEEEhalf();
789 return llvm::APFloat::IEEEsingle();
791 return llvm::APFloat::IEEEdouble();
792 case x87DoubleExtended:
793 return llvm::APFloat::x87DoubleExtended();
795 return llvm::APFloat::IEEEquad();
796 case PPCDoubleDouble:
797 return llvm::APFloat::PPCDoubleDouble();
799 llvm_unreachable("Unrecognised floating semantics");
802 void FloatingLiteral::setSemantics(const llvm::fltSemantics &Sem) {
803 if (&Sem == &llvm::APFloat::IEEEhalf())
804 FloatingLiteralBits.Semantics = IEEEhalf;
805 else if (&Sem == &llvm::APFloat::IEEEsingle())
806 FloatingLiteralBits.Semantics = IEEEsingle;
807 else if (&Sem == &llvm::APFloat::IEEEdouble())
808 FloatingLiteralBits.Semantics = IEEEdouble;
809 else if (&Sem == &llvm::APFloat::x87DoubleExtended())
810 FloatingLiteralBits.Semantics = x87DoubleExtended;
811 else if (&Sem == &llvm::APFloat::IEEEquad())
812 FloatingLiteralBits.Semantics = IEEEquad;
813 else if (&Sem == &llvm::APFloat::PPCDoubleDouble())
814 FloatingLiteralBits.Semantics = PPCDoubleDouble;
816 llvm_unreachable("Unknown floating semantics");
819 /// getValueAsApproximateDouble - This returns the value as an inaccurate
820 /// double. Note that this may cause loss of precision, but is useful for
821 /// debugging dumps, etc.
822 double FloatingLiteral::getValueAsApproximateDouble() const {
823 llvm::APFloat V = getValue();
825 V.convert(llvm::APFloat::IEEEdouble(), llvm::APFloat::rmNearestTiesToEven,
827 return V.convertToDouble();
830 int StringLiteral::mapCharByteWidth(TargetInfo const &target,StringKind k) {
831 int CharByteWidth = 0;
835 CharByteWidth = target.getCharWidth();
838 CharByteWidth = target.getWCharWidth();
841 CharByteWidth = target.getChar16Width();
844 CharByteWidth = target.getChar32Width();
847 assert((CharByteWidth & 7) == 0 && "Assumes character size is byte multiple");
849 assert((CharByteWidth==1 || CharByteWidth==2 || CharByteWidth==4)
850 && "character byte widths supported are 1, 2, and 4 only");
851 return CharByteWidth;
854 StringLiteral *StringLiteral::Create(const ASTContext &C, StringRef Str,
855 StringKind Kind, bool Pascal, QualType Ty,
856 const SourceLocation *Loc,
858 assert(C.getAsConstantArrayType(Ty) &&
859 "StringLiteral must be of constant array type!");
861 // Allocate enough space for the StringLiteral plus an array of locations for
862 // any concatenated string tokens.
864 C.Allocate(sizeof(StringLiteral) + sizeof(SourceLocation) * (NumStrs - 1),
865 alignof(StringLiteral));
866 StringLiteral *SL = new (Mem) StringLiteral(Ty);
868 // OPTIMIZE: could allocate this appended to the StringLiteral.
869 SL->setString(C,Str,Kind,Pascal);
871 SL->TokLocs[0] = Loc[0];
872 SL->NumConcatenated = NumStrs;
875 memcpy(&SL->TokLocs[1], Loc+1, sizeof(SourceLocation)*(NumStrs-1));
879 StringLiteral *StringLiteral::CreateEmpty(const ASTContext &C,
882 C.Allocate(sizeof(StringLiteral) + sizeof(SourceLocation) * (NumStrs - 1),
883 alignof(StringLiteral));
884 StringLiteral *SL = new (Mem) StringLiteral(QualType());
885 SL->CharByteWidth = 0;
887 SL->NumConcatenated = NumStrs;
891 void StringLiteral::outputString(raw_ostream &OS) const {
893 case Ascii: break; // no prefix.
894 case Wide: OS << 'L'; break;
895 case UTF8: OS << "u8"; break;
896 case UTF16: OS << 'u'; break;
897 case UTF32: OS << 'U'; break;
900 static const char Hex[] = "0123456789ABCDEF";
902 unsigned LastSlashX = getLength();
903 for (unsigned I = 0, N = getLength(); I != N; ++I) {
904 switch (uint32_t Char = getCodeUnit(I)) {
906 // FIXME: Convert UTF-8 back to codepoints before rendering.
908 // Convert UTF-16 surrogate pairs back to codepoints before rendering.
909 // Leave invalid surrogates alone; we'll use \x for those.
910 if (getKind() == UTF16 && I != N - 1 && Char >= 0xd800 &&
912 uint32_t Trail = getCodeUnit(I + 1);
913 if (Trail >= 0xdc00 && Trail <= 0xdfff) {
914 Char = 0x10000 + ((Char - 0xd800) << 10) + (Trail - 0xdc00);
920 // If this is a wide string, output characters over 0xff using \x
921 // escapes. Otherwise, this is a UTF-16 or UTF-32 string, and Char is a
922 // codepoint: use \x escapes for invalid codepoints.
923 if (getKind() == Wide ||
924 (Char >= 0xd800 && Char <= 0xdfff) || Char >= 0x110000) {
925 // FIXME: Is this the best way to print wchar_t?
928 while ((Char >> Shift) == 0)
930 for (/**/; Shift >= 0; Shift -= 4)
931 OS << Hex[(Char >> Shift) & 15];
938 << Hex[(Char >> 20) & 15]
939 << Hex[(Char >> 16) & 15];
942 OS << Hex[(Char >> 12) & 15]
943 << Hex[(Char >> 8) & 15]
944 << Hex[(Char >> 4) & 15]
945 << Hex[(Char >> 0) & 15];
949 // If we used \x... for the previous character, and this character is a
950 // hexadecimal digit, prevent it being slurped as part of the \x.
951 if (LastSlashX + 1 == I) {
953 case '0': case '1': case '2': case '3': case '4':
954 case '5': case '6': case '7': case '8': case '9':
955 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
956 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
961 assert(Char <= 0xff &&
962 "Characters above 0xff should already have been handled.");
964 if (isPrintable(Char))
966 else // Output anything hard as an octal escape.
968 << (char)('0' + ((Char >> 6) & 7))
969 << (char)('0' + ((Char >> 3) & 7))
970 << (char)('0' + ((Char >> 0) & 7));
972 // Handle some common non-printable cases to make dumps prettier.
973 case '\\': OS << "\\\\"; break;
974 case '"': OS << "\\\""; break;
975 case '\a': OS << "\\a"; break;
976 case '\b': OS << "\\b"; break;
977 case '\f': OS << "\\f"; break;
978 case '\n': OS << "\\n"; break;
979 case '\r': OS << "\\r"; break;
980 case '\t': OS << "\\t"; break;
981 case '\v': OS << "\\v"; break;
987 void StringLiteral::setString(const ASTContext &C, StringRef Str,
988 StringKind Kind, bool IsPascal) {
989 //FIXME: we assume that the string data comes from a target that uses the same
990 // code unit size and endianess for the type of string.
992 this->IsPascal = IsPascal;
994 CharByteWidth = mapCharByteWidth(C.getTargetInfo(),Kind);
995 assert((Str.size()%CharByteWidth == 0)
996 && "size of data must be multiple of CharByteWidth");
997 Length = Str.size()/CharByteWidth;
999 switch(CharByteWidth) {
1001 char *AStrData = new (C) char[Length];
1002 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
1003 StrData.asChar = AStrData;
1007 uint16_t *AStrData = new (C) uint16_t[Length];
1008 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
1009 StrData.asUInt16 = AStrData;
1013 uint32_t *AStrData = new (C) uint32_t[Length];
1014 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
1015 StrData.asUInt32 = AStrData;
1019 llvm_unreachable("unsupported CharByteWidth");
1023 /// getLocationOfByte - Return a source location that points to the specified
1024 /// byte of this string literal.
1026 /// Strings are amazingly complex. They can be formed from multiple tokens and
1027 /// can have escape sequences in them in addition to the usual trigraph and
1028 /// escaped newline business. This routine handles this complexity.
1030 /// The *StartToken sets the first token to be searched in this function and
1031 /// the *StartTokenByteOffset is the byte offset of the first token. Before
1032 /// returning, it updates the *StartToken to the TokNo of the token being found
1033 /// and sets *StartTokenByteOffset to the byte offset of the token in the
1035 /// Using these two parameters can reduce the time complexity from O(n^2) to
1036 /// O(n) if one wants to get the location of byte for all the tokens in a
1040 StringLiteral::getLocationOfByte(unsigned ByteNo, const SourceManager &SM,
1041 const LangOptions &Features,
1042 const TargetInfo &Target, unsigned *StartToken,
1043 unsigned *StartTokenByteOffset) const {
1044 assert((Kind == StringLiteral::Ascii || Kind == StringLiteral::UTF8) &&
1045 "Only narrow string literals are currently supported");
1047 // Loop over all of the tokens in this string until we find the one that
1048 // contains the byte we're looking for.
1050 unsigned StringOffset = 0;
1052 TokNo = *StartToken;
1053 if (StartTokenByteOffset) {
1054 StringOffset = *StartTokenByteOffset;
1055 ByteNo -= StringOffset;
1058 assert(TokNo < getNumConcatenated() && "Invalid byte number!");
1059 SourceLocation StrTokLoc = getStrTokenLoc(TokNo);
1061 // Get the spelling of the string so that we can get the data that makes up
1062 // the string literal, not the identifier for the macro it is potentially
1063 // expanded through.
1064 SourceLocation StrTokSpellingLoc = SM.getSpellingLoc(StrTokLoc);
1066 // Re-lex the token to get its length and original spelling.
1067 std::pair<FileID, unsigned> LocInfo =
1068 SM.getDecomposedLoc(StrTokSpellingLoc);
1069 bool Invalid = false;
1070 StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid);
1072 if (StartTokenByteOffset != nullptr)
1073 *StartTokenByteOffset = StringOffset;
1074 if (StartToken != nullptr)
1075 *StartToken = TokNo;
1076 return StrTokSpellingLoc;
1079 const char *StrData = Buffer.data()+LocInfo.second;
1081 // Create a lexer starting at the beginning of this token.
1082 Lexer TheLexer(SM.getLocForStartOfFile(LocInfo.first), Features,
1083 Buffer.begin(), StrData, Buffer.end());
1085 TheLexer.LexFromRawLexer(TheTok);
1087 // Use the StringLiteralParser to compute the length of the string in bytes.
1088 StringLiteralParser SLP(TheTok, SM, Features, Target);
1089 unsigned TokNumBytes = SLP.GetStringLength();
1091 // If the byte is in this token, return the location of the byte.
1092 if (ByteNo < TokNumBytes ||
1093 (ByteNo == TokNumBytes && TokNo == getNumConcatenated() - 1)) {
1094 unsigned Offset = SLP.getOffsetOfStringByte(TheTok, ByteNo);
1096 // Now that we know the offset of the token in the spelling, use the
1097 // preprocessor to get the offset in the original source.
1098 if (StartTokenByteOffset != nullptr)
1099 *StartTokenByteOffset = StringOffset;
1100 if (StartToken != nullptr)
1101 *StartToken = TokNo;
1102 return Lexer::AdvanceToTokenCharacter(StrTokLoc, Offset, SM, Features);
1105 // Move to the next string token.
1106 StringOffset += TokNumBytes;
1108 ByteNo -= TokNumBytes;
1114 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1115 /// corresponds to, e.g. "sizeof" or "[pre]++".
1116 StringRef UnaryOperator::getOpcodeStr(Opcode Op) {
1118 #define UNARY_OPERATION(Name, Spelling) case UO_##Name: return Spelling;
1119 #include "clang/AST/OperationKinds.def"
1121 llvm_unreachable("Unknown unary operator");
1125 UnaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix) {
1127 default: llvm_unreachable("No unary operator for overloaded function");
1128 case OO_PlusPlus: return Postfix ? UO_PostInc : UO_PreInc;
1129 case OO_MinusMinus: return Postfix ? UO_PostDec : UO_PreDec;
1130 case OO_Amp: return UO_AddrOf;
1131 case OO_Star: return UO_Deref;
1132 case OO_Plus: return UO_Plus;
1133 case OO_Minus: return UO_Minus;
1134 case OO_Tilde: return UO_Not;
1135 case OO_Exclaim: return UO_LNot;
1136 case OO_Coawait: return UO_Coawait;
1140 OverloadedOperatorKind UnaryOperator::getOverloadedOperator(Opcode Opc) {
1142 case UO_PostInc: case UO_PreInc: return OO_PlusPlus;
1143 case UO_PostDec: case UO_PreDec: return OO_MinusMinus;
1144 case UO_AddrOf: return OO_Amp;
1145 case UO_Deref: return OO_Star;
1146 case UO_Plus: return OO_Plus;
1147 case UO_Minus: return OO_Minus;
1148 case UO_Not: return OO_Tilde;
1149 case UO_LNot: return OO_Exclaim;
1150 case UO_Coawait: return OO_Coawait;
1151 default: return OO_None;
1156 //===----------------------------------------------------------------------===//
1157 // Postfix Operators.
1158 //===----------------------------------------------------------------------===//
1160 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, Expr *fn,
1161 ArrayRef<Expr *> preargs, ArrayRef<Expr *> args, QualType t,
1162 ExprValueKind VK, SourceLocation rparenloc)
1163 : Expr(SC, t, VK, OK_Ordinary, fn->isTypeDependent(),
1164 fn->isValueDependent(), fn->isInstantiationDependent(),
1165 fn->containsUnexpandedParameterPack()),
1166 NumArgs(args.size()) {
1168 unsigned NumPreArgs = preargs.size();
1169 SubExprs = new (C) Stmt *[args.size()+PREARGS_START+NumPreArgs];
1171 for (unsigned i = 0; i != NumPreArgs; ++i) {
1172 updateDependenciesFromArg(preargs[i]);
1173 SubExprs[i+PREARGS_START] = preargs[i];
1175 for (unsigned i = 0; i != args.size(); ++i) {
1176 updateDependenciesFromArg(args[i]);
1177 SubExprs[i+PREARGS_START+NumPreArgs] = args[i];
1180 CallExprBits.NumPreArgs = NumPreArgs;
1181 RParenLoc = rparenloc;
1184 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, Expr *fn,
1185 ArrayRef<Expr *> args, QualType t, ExprValueKind VK,
1186 SourceLocation rparenloc)
1187 : CallExpr(C, SC, fn, ArrayRef<Expr *>(), args, t, VK, rparenloc) {}
1189 CallExpr::CallExpr(const ASTContext &C, Expr *fn, ArrayRef<Expr *> args,
1190 QualType t, ExprValueKind VK, SourceLocation rparenloc)
1191 : CallExpr(C, CallExprClass, fn, ArrayRef<Expr *>(), args, t, VK, rparenloc) {
1194 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, EmptyShell Empty)
1195 : CallExpr(C, SC, /*NumPreArgs=*/0, Empty) {}
1197 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, unsigned NumPreArgs,
1199 : Expr(SC, Empty), SubExprs(nullptr), NumArgs(0) {
1200 // FIXME: Why do we allocate this?
1201 SubExprs = new (C) Stmt*[PREARGS_START+NumPreArgs]();
1202 CallExprBits.NumPreArgs = NumPreArgs;
1205 void CallExpr::updateDependenciesFromArg(Expr *Arg) {
1206 if (Arg->isTypeDependent())
1207 ExprBits.TypeDependent = true;
1208 if (Arg->isValueDependent())
1209 ExprBits.ValueDependent = true;
1210 if (Arg->isInstantiationDependent())
1211 ExprBits.InstantiationDependent = true;
1212 if (Arg->containsUnexpandedParameterPack())
1213 ExprBits.ContainsUnexpandedParameterPack = true;
1216 FunctionDecl *CallExpr::getDirectCallee() {
1217 return dyn_cast_or_null<FunctionDecl>(getCalleeDecl());
1220 Decl *CallExpr::getCalleeDecl() {
1221 return getCallee()->getReferencedDeclOfCallee();
1224 Decl *Expr::getReferencedDeclOfCallee() {
1225 Expr *CEE = IgnoreParenImpCasts();
1227 while (SubstNonTypeTemplateParmExpr *NTTP
1228 = dyn_cast<SubstNonTypeTemplateParmExpr>(CEE)) {
1229 CEE = NTTP->getReplacement()->IgnoreParenCasts();
1232 // If we're calling a dereference, look at the pointer instead.
1233 if (BinaryOperator *BO = dyn_cast<BinaryOperator>(CEE)) {
1234 if (BO->isPtrMemOp())
1235 CEE = BO->getRHS()->IgnoreParenCasts();
1236 } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(CEE)) {
1237 if (UO->getOpcode() == UO_Deref)
1238 CEE = UO->getSubExpr()->IgnoreParenCasts();
1240 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE))
1241 return DRE->getDecl();
1242 if (MemberExpr *ME = dyn_cast<MemberExpr>(CEE))
1243 return ME->getMemberDecl();
1248 /// setNumArgs - This changes the number of arguments present in this call.
1249 /// Any orphaned expressions are deleted by this, and any new operands are set
1251 void CallExpr::setNumArgs(const ASTContext& C, unsigned NumArgs) {
1252 // No change, just return.
1253 if (NumArgs == getNumArgs()) return;
1255 // If shrinking # arguments, just delete the extras and forgot them.
1256 if (NumArgs < getNumArgs()) {
1257 this->NumArgs = NumArgs;
1261 // Otherwise, we are growing the # arguments. New an bigger argument array.
1262 unsigned NumPreArgs = getNumPreArgs();
1263 Stmt **NewSubExprs = new (C) Stmt*[NumArgs+PREARGS_START+NumPreArgs];
1265 for (unsigned i = 0; i != getNumArgs()+PREARGS_START+NumPreArgs; ++i)
1266 NewSubExprs[i] = SubExprs[i];
1267 // Null out new args.
1268 for (unsigned i = getNumArgs()+PREARGS_START+NumPreArgs;
1269 i != NumArgs+PREARGS_START+NumPreArgs; ++i)
1270 NewSubExprs[i] = nullptr;
1272 if (SubExprs) C.Deallocate(SubExprs);
1273 SubExprs = NewSubExprs;
1274 this->NumArgs = NumArgs;
1277 /// getBuiltinCallee - If this is a call to a builtin, return the builtin ID. If
1279 unsigned CallExpr::getBuiltinCallee() const {
1280 // All simple function calls (e.g. func()) are implicitly cast to pointer to
1281 // function. As a result, we try and obtain the DeclRefExpr from the
1282 // ImplicitCastExpr.
1283 const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee());
1284 if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()).
1287 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr());
1291 const FunctionDecl *FDecl = dyn_cast<FunctionDecl>(DRE->getDecl());
1295 if (!FDecl->getIdentifier())
1298 return FDecl->getBuiltinID();
1301 bool CallExpr::isUnevaluatedBuiltinCall(const ASTContext &Ctx) const {
1302 if (unsigned BI = getBuiltinCallee())
1303 return Ctx.BuiltinInfo.isUnevaluated(BI);
1307 QualType CallExpr::getCallReturnType(const ASTContext &Ctx) const {
1308 const Expr *Callee = getCallee();
1309 QualType CalleeType = Callee->getType();
1310 if (const auto *FnTypePtr = CalleeType->getAs<PointerType>()) {
1311 CalleeType = FnTypePtr->getPointeeType();
1312 } else if (const auto *BPT = CalleeType->getAs<BlockPointerType>()) {
1313 CalleeType = BPT->getPointeeType();
1314 } else if (CalleeType->isSpecificPlaceholderType(BuiltinType::BoundMember)) {
1315 if (isa<CXXPseudoDestructorExpr>(Callee->IgnoreParens()))
1318 // This should never be overloaded and so should never return null.
1319 CalleeType = Expr::findBoundMemberType(Callee);
1322 const FunctionType *FnType = CalleeType->castAs<FunctionType>();
1323 return FnType->getReturnType();
1326 SourceLocation CallExpr::getLocStart() const {
1327 if (isa<CXXOperatorCallExpr>(this))
1328 return cast<CXXOperatorCallExpr>(this)->getLocStart();
1330 SourceLocation begin = getCallee()->getLocStart();
1331 if (begin.isInvalid() && getNumArgs() > 0 && getArg(0))
1332 begin = getArg(0)->getLocStart();
1335 SourceLocation CallExpr::getLocEnd() const {
1336 if (isa<CXXOperatorCallExpr>(this))
1337 return cast<CXXOperatorCallExpr>(this)->getLocEnd();
1339 SourceLocation end = getRParenLoc();
1340 if (end.isInvalid() && getNumArgs() > 0 && getArg(getNumArgs() - 1))
1341 end = getArg(getNumArgs() - 1)->getLocEnd();
1345 OffsetOfExpr *OffsetOfExpr::Create(const ASTContext &C, QualType type,
1346 SourceLocation OperatorLoc,
1347 TypeSourceInfo *tsi,
1348 ArrayRef<OffsetOfNode> comps,
1349 ArrayRef<Expr*> exprs,
1350 SourceLocation RParenLoc) {
1351 void *Mem = C.Allocate(
1352 totalSizeToAlloc<OffsetOfNode, Expr *>(comps.size(), exprs.size()));
1354 return new (Mem) OffsetOfExpr(C, type, OperatorLoc, tsi, comps, exprs,
1358 OffsetOfExpr *OffsetOfExpr::CreateEmpty(const ASTContext &C,
1359 unsigned numComps, unsigned numExprs) {
1361 C.Allocate(totalSizeToAlloc<OffsetOfNode, Expr *>(numComps, numExprs));
1362 return new (Mem) OffsetOfExpr(numComps, numExprs);
1365 OffsetOfExpr::OffsetOfExpr(const ASTContext &C, QualType type,
1366 SourceLocation OperatorLoc, TypeSourceInfo *tsi,
1367 ArrayRef<OffsetOfNode> comps, ArrayRef<Expr*> exprs,
1368 SourceLocation RParenLoc)
1369 : Expr(OffsetOfExprClass, type, VK_RValue, OK_Ordinary,
1370 /*TypeDependent=*/false,
1371 /*ValueDependent=*/tsi->getType()->isDependentType(),
1372 tsi->getType()->isInstantiationDependentType(),
1373 tsi->getType()->containsUnexpandedParameterPack()),
1374 OperatorLoc(OperatorLoc), RParenLoc(RParenLoc), TSInfo(tsi),
1375 NumComps(comps.size()), NumExprs(exprs.size())
1377 for (unsigned i = 0; i != comps.size(); ++i) {
1378 setComponent(i, comps[i]);
1381 for (unsigned i = 0; i != exprs.size(); ++i) {
1382 if (exprs[i]->isTypeDependent() || exprs[i]->isValueDependent())
1383 ExprBits.ValueDependent = true;
1384 if (exprs[i]->containsUnexpandedParameterPack())
1385 ExprBits.ContainsUnexpandedParameterPack = true;
1387 setIndexExpr(i, exprs[i]);
1391 IdentifierInfo *OffsetOfNode::getFieldName() const {
1392 assert(getKind() == Field || getKind() == Identifier);
1393 if (getKind() == Field)
1394 return getField()->getIdentifier();
1396 return reinterpret_cast<IdentifierInfo *> (Data & ~(uintptr_t)Mask);
1399 UnaryExprOrTypeTraitExpr::UnaryExprOrTypeTraitExpr(
1400 UnaryExprOrTypeTrait ExprKind, Expr *E, QualType resultType,
1401 SourceLocation op, SourceLocation rp)
1402 : Expr(UnaryExprOrTypeTraitExprClass, resultType, VK_RValue, OK_Ordinary,
1403 false, // Never type-dependent (C++ [temp.dep.expr]p3).
1404 // Value-dependent if the argument is type-dependent.
1405 E->isTypeDependent(), E->isInstantiationDependent(),
1406 E->containsUnexpandedParameterPack()),
1407 OpLoc(op), RParenLoc(rp) {
1408 UnaryExprOrTypeTraitExprBits.Kind = ExprKind;
1409 UnaryExprOrTypeTraitExprBits.IsType = false;
1412 // Check to see if we are in the situation where alignof(decl) should be
1413 // dependent because decl's alignment is dependent.
1414 if (ExprKind == UETT_AlignOf) {
1415 if (!isValueDependent() || !isInstantiationDependent()) {
1416 E = E->IgnoreParens();
1418 const ValueDecl *D = nullptr;
1419 if (const auto *DRE = dyn_cast<DeclRefExpr>(E))
1421 else if (const auto *ME = dyn_cast<MemberExpr>(E))
1422 D = ME->getMemberDecl();
1425 for (const auto *I : D->specific_attrs<AlignedAttr>()) {
1426 if (I->isAlignmentDependent()) {
1427 setValueDependent(true);
1428 setInstantiationDependent(true);
1437 MemberExpr *MemberExpr::Create(
1438 const ASTContext &C, Expr *base, bool isarrow, SourceLocation OperatorLoc,
1439 NestedNameSpecifierLoc QualifierLoc, SourceLocation TemplateKWLoc,
1440 ValueDecl *memberdecl, DeclAccessPair founddecl,
1441 DeclarationNameInfo nameinfo, const TemplateArgumentListInfo *targs,
1442 QualType ty, ExprValueKind vk, ExprObjectKind ok) {
1444 bool hasQualOrFound = (QualifierLoc ||
1445 founddecl.getDecl() != memberdecl ||
1446 founddecl.getAccess() != memberdecl->getAccess());
1448 bool HasTemplateKWAndArgsInfo = targs || TemplateKWLoc.isValid();
1450 totalSizeToAlloc<MemberExprNameQualifier, ASTTemplateKWAndArgsInfo,
1451 TemplateArgumentLoc>(hasQualOrFound ? 1 : 0,
1452 HasTemplateKWAndArgsInfo ? 1 : 0,
1453 targs ? targs->size() : 0);
1455 void *Mem = C.Allocate(Size, alignof(MemberExpr));
1456 MemberExpr *E = new (Mem)
1457 MemberExpr(base, isarrow, OperatorLoc, memberdecl, nameinfo, ty, vk, ok);
1459 if (hasQualOrFound) {
1460 // FIXME: Wrong. We should be looking at the member declaration we found.
1461 if (QualifierLoc && QualifierLoc.getNestedNameSpecifier()->isDependent()) {
1462 E->setValueDependent(true);
1463 E->setTypeDependent(true);
1464 E->setInstantiationDependent(true);
1466 else if (QualifierLoc &&
1467 QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent())
1468 E->setInstantiationDependent(true);
1470 E->HasQualifierOrFoundDecl = true;
1472 MemberExprNameQualifier *NQ =
1473 E->getTrailingObjects<MemberExprNameQualifier>();
1474 NQ->QualifierLoc = QualifierLoc;
1475 NQ->FoundDecl = founddecl;
1478 E->HasTemplateKWAndArgsInfo = (targs || TemplateKWLoc.isValid());
1481 bool Dependent = false;
1482 bool InstantiationDependent = false;
1483 bool ContainsUnexpandedParameterPack = false;
1484 E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
1485 TemplateKWLoc, *targs, E->getTrailingObjects<TemplateArgumentLoc>(),
1486 Dependent, InstantiationDependent, ContainsUnexpandedParameterPack);
1487 if (InstantiationDependent)
1488 E->setInstantiationDependent(true);
1489 } else if (TemplateKWLoc.isValid()) {
1490 E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
1497 SourceLocation MemberExpr::getLocStart() const {
1498 if (isImplicitAccess()) {
1500 return getQualifierLoc().getBeginLoc();
1504 // FIXME: We don't want this to happen. Rather, we should be able to
1505 // detect all kinds of implicit accesses more cleanly.
1506 SourceLocation BaseStartLoc = getBase()->getLocStart();
1507 if (BaseStartLoc.isValid())
1508 return BaseStartLoc;
1511 SourceLocation MemberExpr::getLocEnd() const {
1512 SourceLocation EndLoc = getMemberNameInfo().getEndLoc();
1513 if (hasExplicitTemplateArgs())
1514 EndLoc = getRAngleLoc();
1515 else if (EndLoc.isInvalid())
1516 EndLoc = getBase()->getLocEnd();
1520 bool CastExpr::CastConsistency() const {
1521 switch (getCastKind()) {
1522 case CK_DerivedToBase:
1523 case CK_UncheckedDerivedToBase:
1524 case CK_DerivedToBaseMemberPointer:
1525 case CK_BaseToDerived:
1526 case CK_BaseToDerivedMemberPointer:
1527 assert(!path_empty() && "Cast kind should have a base path!");
1530 case CK_CPointerToObjCPointerCast:
1531 assert(getType()->isObjCObjectPointerType());
1532 assert(getSubExpr()->getType()->isPointerType());
1533 goto CheckNoBasePath;
1535 case CK_BlockPointerToObjCPointerCast:
1536 assert(getType()->isObjCObjectPointerType());
1537 assert(getSubExpr()->getType()->isBlockPointerType());
1538 goto CheckNoBasePath;
1540 case CK_ReinterpretMemberPointer:
1541 assert(getType()->isMemberPointerType());
1542 assert(getSubExpr()->getType()->isMemberPointerType());
1543 goto CheckNoBasePath;
1546 // Arbitrary casts to C pointer types count as bitcasts.
1547 // Otherwise, we should only have block and ObjC pointer casts
1548 // here if they stay within the type kind.
1549 if (!getType()->isPointerType()) {
1550 assert(getType()->isObjCObjectPointerType() ==
1551 getSubExpr()->getType()->isObjCObjectPointerType());
1552 assert(getType()->isBlockPointerType() ==
1553 getSubExpr()->getType()->isBlockPointerType());
1555 goto CheckNoBasePath;
1557 case CK_AnyPointerToBlockPointerCast:
1558 assert(getType()->isBlockPointerType());
1559 assert(getSubExpr()->getType()->isAnyPointerType() &&
1560 !getSubExpr()->getType()->isBlockPointerType());
1561 goto CheckNoBasePath;
1563 case CK_CopyAndAutoreleaseBlockObject:
1564 assert(getType()->isBlockPointerType());
1565 assert(getSubExpr()->getType()->isBlockPointerType());
1566 goto CheckNoBasePath;
1568 case CK_FunctionToPointerDecay:
1569 assert(getType()->isPointerType());
1570 assert(getSubExpr()->getType()->isFunctionType());
1571 goto CheckNoBasePath;
1573 case CK_AddressSpaceConversion:
1574 assert(getType()->isPointerType());
1575 assert(getSubExpr()->getType()->isPointerType());
1576 assert(getType()->getPointeeType().getAddressSpace() !=
1577 getSubExpr()->getType()->getPointeeType().getAddressSpace());
1578 // These should not have an inheritance path.
1581 case CK_ArrayToPointerDecay:
1582 case CK_NullToMemberPointer:
1583 case CK_NullToPointer:
1584 case CK_ConstructorConversion:
1585 case CK_IntegralToPointer:
1586 case CK_PointerToIntegral:
1588 case CK_VectorSplat:
1589 case CK_IntegralCast:
1590 case CK_BooleanToSignedIntegral:
1591 case CK_IntegralToFloating:
1592 case CK_FloatingToIntegral:
1593 case CK_FloatingCast:
1594 case CK_ObjCObjectLValueCast:
1595 case CK_FloatingRealToComplex:
1596 case CK_FloatingComplexToReal:
1597 case CK_FloatingComplexCast:
1598 case CK_FloatingComplexToIntegralComplex:
1599 case CK_IntegralRealToComplex:
1600 case CK_IntegralComplexToReal:
1601 case CK_IntegralComplexCast:
1602 case CK_IntegralComplexToFloatingComplex:
1603 case CK_ARCProduceObject:
1604 case CK_ARCConsumeObject:
1605 case CK_ARCReclaimReturnedObject:
1606 case CK_ARCExtendBlockObject:
1607 case CK_ZeroToOCLEvent:
1608 case CK_ZeroToOCLQueue:
1609 case CK_IntToOCLSampler:
1610 assert(!getType()->isBooleanType() && "unheralded conversion to bool");
1611 goto CheckNoBasePath;
1614 case CK_LValueToRValue:
1616 case CK_AtomicToNonAtomic:
1617 case CK_NonAtomicToAtomic:
1618 case CK_PointerToBoolean:
1619 case CK_IntegralToBoolean:
1620 case CK_FloatingToBoolean:
1621 case CK_MemberPointerToBoolean:
1622 case CK_FloatingComplexToBoolean:
1623 case CK_IntegralComplexToBoolean:
1624 case CK_LValueBitCast: // -> bool&
1625 case CK_UserDefinedConversion: // operator bool()
1626 case CK_BuiltinFnToFnPtr:
1628 assert(path_empty() && "Cast kind should not have a base path!");
1634 const char *CastExpr::getCastKindName() const {
1635 switch (getCastKind()) {
1636 #define CAST_OPERATION(Name) case CK_##Name: return #Name;
1637 #include "clang/AST/OperationKinds.def"
1639 llvm_unreachable("Unhandled cast kind!");
1642 Expr *CastExpr::getSubExprAsWritten() {
1643 Expr *SubExpr = nullptr;
1646 SubExpr = E->getSubExpr();
1648 // Skip through reference binding to temporary.
1649 if (MaterializeTemporaryExpr *Materialize
1650 = dyn_cast<MaterializeTemporaryExpr>(SubExpr))
1651 SubExpr = Materialize->GetTemporaryExpr();
1653 // Skip any temporary bindings; they're implicit.
1654 if (CXXBindTemporaryExpr *Binder = dyn_cast<CXXBindTemporaryExpr>(SubExpr))
1655 SubExpr = Binder->getSubExpr();
1657 // Conversions by constructor and conversion functions have a
1658 // subexpression describing the call; strip it off.
1659 if (E->getCastKind() == CK_ConstructorConversion)
1660 SubExpr = cast<CXXConstructExpr>(SubExpr)->getArg(0);
1661 else if (E->getCastKind() == CK_UserDefinedConversion) {
1662 assert((isa<CXXMemberCallExpr>(SubExpr) ||
1663 isa<BlockExpr>(SubExpr)) &&
1664 "Unexpected SubExpr for CK_UserDefinedConversion.");
1665 if (isa<CXXMemberCallExpr>(SubExpr))
1666 SubExpr = cast<CXXMemberCallExpr>(SubExpr)->getImplicitObjectArgument();
1669 // If the subexpression we're left with is an implicit cast, look
1670 // through that, too.
1671 } while ((E = dyn_cast<ImplicitCastExpr>(SubExpr)));
1676 CXXBaseSpecifier **CastExpr::path_buffer() {
1677 switch (getStmtClass()) {
1678 #define ABSTRACT_STMT(x)
1679 #define CASTEXPR(Type, Base) \
1680 case Stmt::Type##Class: \
1681 return static_cast<Type *>(this)->getTrailingObjects<CXXBaseSpecifier *>();
1682 #define STMT(Type, Base)
1683 #include "clang/AST/StmtNodes.inc"
1685 llvm_unreachable("non-cast expressions not possible here");
1689 ImplicitCastExpr *ImplicitCastExpr::Create(const ASTContext &C, QualType T,
1690 CastKind Kind, Expr *Operand,
1691 const CXXCastPath *BasePath,
1693 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1694 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1695 ImplicitCastExpr *E =
1696 new (Buffer) ImplicitCastExpr(T, Kind, Operand, PathSize, VK);
1698 std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
1699 E->getTrailingObjects<CXXBaseSpecifier *>());
1703 ImplicitCastExpr *ImplicitCastExpr::CreateEmpty(const ASTContext &C,
1704 unsigned PathSize) {
1705 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1706 return new (Buffer) ImplicitCastExpr(EmptyShell(), PathSize);
1710 CStyleCastExpr *CStyleCastExpr::Create(const ASTContext &C, QualType T,
1711 ExprValueKind VK, CastKind K, Expr *Op,
1712 const CXXCastPath *BasePath,
1713 TypeSourceInfo *WrittenTy,
1714 SourceLocation L, SourceLocation R) {
1715 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1716 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1718 new (Buffer) CStyleCastExpr(T, VK, K, Op, PathSize, WrittenTy, L, R);
1720 std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
1721 E->getTrailingObjects<CXXBaseSpecifier *>());
1725 CStyleCastExpr *CStyleCastExpr::CreateEmpty(const ASTContext &C,
1726 unsigned PathSize) {
1727 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1728 return new (Buffer) CStyleCastExpr(EmptyShell(), PathSize);
1731 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1732 /// corresponds to, e.g. "<<=".
1733 StringRef BinaryOperator::getOpcodeStr(Opcode Op) {
1735 #define BINARY_OPERATION(Name, Spelling) case BO_##Name: return Spelling;
1736 #include "clang/AST/OperationKinds.def"
1738 llvm_unreachable("Invalid OpCode!");
1742 BinaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO) {
1744 default: llvm_unreachable("Not an overloadable binary operator");
1745 case OO_Plus: return BO_Add;
1746 case OO_Minus: return BO_Sub;
1747 case OO_Star: return BO_Mul;
1748 case OO_Slash: return BO_Div;
1749 case OO_Percent: return BO_Rem;
1750 case OO_Caret: return BO_Xor;
1751 case OO_Amp: return BO_And;
1752 case OO_Pipe: return BO_Or;
1753 case OO_Equal: return BO_Assign;
1754 case OO_Less: return BO_LT;
1755 case OO_Greater: return BO_GT;
1756 case OO_PlusEqual: return BO_AddAssign;
1757 case OO_MinusEqual: return BO_SubAssign;
1758 case OO_StarEqual: return BO_MulAssign;
1759 case OO_SlashEqual: return BO_DivAssign;
1760 case OO_PercentEqual: return BO_RemAssign;
1761 case OO_CaretEqual: return BO_XorAssign;
1762 case OO_AmpEqual: return BO_AndAssign;
1763 case OO_PipeEqual: return BO_OrAssign;
1764 case OO_LessLess: return BO_Shl;
1765 case OO_GreaterGreater: return BO_Shr;
1766 case OO_LessLessEqual: return BO_ShlAssign;
1767 case OO_GreaterGreaterEqual: return BO_ShrAssign;
1768 case OO_EqualEqual: return BO_EQ;
1769 case OO_ExclaimEqual: return BO_NE;
1770 case OO_LessEqual: return BO_LE;
1771 case OO_GreaterEqual: return BO_GE;
1772 case OO_AmpAmp: return BO_LAnd;
1773 case OO_PipePipe: return BO_LOr;
1774 case OO_Comma: return BO_Comma;
1775 case OO_ArrowStar: return BO_PtrMemI;
1779 OverloadedOperatorKind BinaryOperator::getOverloadedOperator(Opcode Opc) {
1780 static const OverloadedOperatorKind OverOps[] = {
1781 /* .* Cannot be overloaded */OO_None, OO_ArrowStar,
1782 OO_Star, OO_Slash, OO_Percent,
1784 OO_LessLess, OO_GreaterGreater,
1785 OO_Less, OO_Greater, OO_LessEqual, OO_GreaterEqual,
1786 OO_EqualEqual, OO_ExclaimEqual,
1792 OO_Equal, OO_StarEqual,
1793 OO_SlashEqual, OO_PercentEqual,
1794 OO_PlusEqual, OO_MinusEqual,
1795 OO_LessLessEqual, OO_GreaterGreaterEqual,
1796 OO_AmpEqual, OO_CaretEqual,
1800 return OverOps[Opc];
1803 InitListExpr::InitListExpr(const ASTContext &C, SourceLocation lbraceloc,
1804 ArrayRef<Expr*> initExprs, SourceLocation rbraceloc)
1805 : Expr(InitListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false,
1807 InitExprs(C, initExprs.size()),
1808 LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), AltForm(nullptr, true)
1810 sawArrayRangeDesignator(false);
1811 for (unsigned I = 0; I != initExprs.size(); ++I) {
1812 if (initExprs[I]->isTypeDependent())
1813 ExprBits.TypeDependent = true;
1814 if (initExprs[I]->isValueDependent())
1815 ExprBits.ValueDependent = true;
1816 if (initExprs[I]->isInstantiationDependent())
1817 ExprBits.InstantiationDependent = true;
1818 if (initExprs[I]->containsUnexpandedParameterPack())
1819 ExprBits.ContainsUnexpandedParameterPack = true;
1822 InitExprs.insert(C, InitExprs.end(), initExprs.begin(), initExprs.end());
1825 void InitListExpr::reserveInits(const ASTContext &C, unsigned NumInits) {
1826 if (NumInits > InitExprs.size())
1827 InitExprs.reserve(C, NumInits);
1830 void InitListExpr::resizeInits(const ASTContext &C, unsigned NumInits) {
1831 InitExprs.resize(C, NumInits, nullptr);
1834 Expr *InitListExpr::updateInit(const ASTContext &C, unsigned Init, Expr *expr) {
1835 if (Init >= InitExprs.size()) {
1836 InitExprs.insert(C, InitExprs.end(), Init - InitExprs.size() + 1, nullptr);
1837 setInit(Init, expr);
1841 Expr *Result = cast_or_null<Expr>(InitExprs[Init]);
1842 setInit(Init, expr);
1846 void InitListExpr::setArrayFiller(Expr *filler) {
1847 assert(!hasArrayFiller() && "Filler already set!");
1848 ArrayFillerOrUnionFieldInit = filler;
1849 // Fill out any "holes" in the array due to designated initializers.
1850 Expr **inits = getInits();
1851 for (unsigned i = 0, e = getNumInits(); i != e; ++i)
1852 if (inits[i] == nullptr)
1856 bool InitListExpr::isStringLiteralInit() const {
1857 if (getNumInits() != 1)
1859 const ArrayType *AT = getType()->getAsArrayTypeUnsafe();
1860 if (!AT || !AT->getElementType()->isIntegerType())
1862 // It is possible for getInit() to return null.
1863 const Expr *Init = getInit(0);
1866 Init = Init->IgnoreParens();
1867 return isa<StringLiteral>(Init) || isa<ObjCEncodeExpr>(Init);
1870 bool InitListExpr::isTransparent() const {
1871 assert(isSemanticForm() && "syntactic form never semantically transparent");
1873 // A glvalue InitListExpr is always just sugar.
1875 assert(getNumInits() == 1 && "multiple inits in glvalue init list");
1879 // Otherwise, we're sugar if and only if we have exactly one initializer that
1880 // is of the same type.
1881 if (getNumInits() != 1 || !getInit(0))
1884 return getType().getCanonicalType() ==
1885 getInit(0)->getType().getCanonicalType();
1888 SourceLocation InitListExpr::getLocStart() const {
1889 if (InitListExpr *SyntacticForm = getSyntacticForm())
1890 return SyntacticForm->getLocStart();
1891 SourceLocation Beg = LBraceLoc;
1892 if (Beg.isInvalid()) {
1893 // Find the first non-null initializer.
1894 for (InitExprsTy::const_iterator I = InitExprs.begin(),
1895 E = InitExprs.end();
1898 Beg = S->getLocStart();
1906 SourceLocation InitListExpr::getLocEnd() const {
1907 if (InitListExpr *SyntacticForm = getSyntacticForm())
1908 return SyntacticForm->getLocEnd();
1909 SourceLocation End = RBraceLoc;
1910 if (End.isInvalid()) {
1911 // Find the first non-null initializer from the end.
1912 for (InitExprsTy::const_reverse_iterator I = InitExprs.rbegin(),
1913 E = InitExprs.rend();
1916 End = S->getLocEnd();
1924 /// getFunctionType - Return the underlying function type for this block.
1926 const FunctionProtoType *BlockExpr::getFunctionType() const {
1927 // The block pointer is never sugared, but the function type might be.
1928 return cast<BlockPointerType>(getType())
1929 ->getPointeeType()->castAs<FunctionProtoType>();
1932 SourceLocation BlockExpr::getCaretLocation() const {
1933 return TheBlock->getCaretLocation();
1935 const Stmt *BlockExpr::getBody() const {
1936 return TheBlock->getBody();
1938 Stmt *BlockExpr::getBody() {
1939 return TheBlock->getBody();
1943 //===----------------------------------------------------------------------===//
1944 // Generic Expression Routines
1945 //===----------------------------------------------------------------------===//
1947 /// isUnusedResultAWarning - Return true if this immediate expression should
1948 /// be warned about if the result is unused. If so, fill in Loc and Ranges
1949 /// with location to warn on and the source range[s] to report with the
1951 bool Expr::isUnusedResultAWarning(const Expr *&WarnE, SourceLocation &Loc,
1952 SourceRange &R1, SourceRange &R2,
1953 ASTContext &Ctx) const {
1954 // Don't warn if the expr is type dependent. The type could end up
1955 // instantiating to void.
1956 if (isTypeDependent())
1959 switch (getStmtClass()) {
1961 if (getType()->isVoidType())
1965 R1 = getSourceRange();
1967 case ParenExprClass:
1968 return cast<ParenExpr>(this)->getSubExpr()->
1969 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
1970 case GenericSelectionExprClass:
1971 return cast<GenericSelectionExpr>(this)->getResultExpr()->
1972 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
1973 case ChooseExprClass:
1974 return cast<ChooseExpr>(this)->getChosenSubExpr()->
1975 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
1976 case UnaryOperatorClass: {
1977 const UnaryOperator *UO = cast<UnaryOperator>(this);
1979 switch (UO->getOpcode()) {
1988 // This is just the 'operator co_await' call inside the guts of a
1989 // dependent co_await call.
1993 case UO_PreDec: // ++/--
1994 return false; // Not a warning.
1997 // accessing a piece of a volatile complex is a side-effect.
1998 if (Ctx.getCanonicalType(UO->getSubExpr()->getType())
1999 .isVolatileQualified())
2003 return UO->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2006 Loc = UO->getOperatorLoc();
2007 R1 = UO->getSubExpr()->getSourceRange();
2010 case BinaryOperatorClass: {
2011 const BinaryOperator *BO = cast<BinaryOperator>(this);
2012 switch (BO->getOpcode()) {
2015 // Consider the RHS of comma for side effects. LHS was checked by
2016 // Sema::CheckCommaOperands.
2018 // ((foo = <blah>), 0) is an idiom for hiding the result (and
2019 // lvalue-ness) of an assignment written in a macro.
2020 if (IntegerLiteral *IE =
2021 dyn_cast<IntegerLiteral>(BO->getRHS()->IgnoreParens()))
2022 if (IE->getValue() == 0)
2024 return BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2025 // Consider '||', '&&' to have side effects if the LHS or RHS does.
2028 if (!BO->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) ||
2029 !BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2033 if (BO->isAssignmentOp())
2036 Loc = BO->getOperatorLoc();
2037 R1 = BO->getLHS()->getSourceRange();
2038 R2 = BO->getRHS()->getSourceRange();
2041 case CompoundAssignOperatorClass:
2042 case VAArgExprClass:
2043 case AtomicExprClass:
2046 case ConditionalOperatorClass: {
2047 // If only one of the LHS or RHS is a warning, the operator might
2048 // be being used for control flow. Only warn if both the LHS and
2049 // RHS are warnings.
2050 const ConditionalOperator *Exp = cast<ConditionalOperator>(this);
2051 if (!Exp->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2055 return Exp->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2058 case MemberExprClass:
2060 Loc = cast<MemberExpr>(this)->getMemberLoc();
2061 R1 = SourceRange(Loc, Loc);
2062 R2 = cast<MemberExpr>(this)->getBase()->getSourceRange();
2065 case ArraySubscriptExprClass:
2067 Loc = cast<ArraySubscriptExpr>(this)->getRBracketLoc();
2068 R1 = cast<ArraySubscriptExpr>(this)->getLHS()->getSourceRange();
2069 R2 = cast<ArraySubscriptExpr>(this)->getRHS()->getSourceRange();
2072 case CXXOperatorCallExprClass: {
2073 // Warn about operator ==,!=,<,>,<=, and >= even when user-defined operator
2074 // overloads as there is no reasonable way to define these such that they
2075 // have non-trivial, desirable side-effects. See the -Wunused-comparison
2076 // warning: operators == and != are commonly typo'ed, and so warning on them
2077 // provides additional value as well. If this list is updated,
2078 // DiagnoseUnusedComparison should be as well.
2079 const CXXOperatorCallExpr *Op = cast<CXXOperatorCallExpr>(this);
2080 switch (Op->getOperator()) {
2084 case OO_ExclaimEqual:
2087 case OO_GreaterEqual:
2089 if (Op->getCallReturnType(Ctx)->isReferenceType() ||
2090 Op->getCallReturnType(Ctx)->isVoidType())
2093 Loc = Op->getOperatorLoc();
2094 R1 = Op->getSourceRange();
2098 // Fallthrough for generic call handling.
2101 case CXXMemberCallExprClass:
2102 case UserDefinedLiteralClass: {
2103 // If this is a direct call, get the callee.
2104 const CallExpr *CE = cast<CallExpr>(this);
2105 if (const Decl *FD = CE->getCalleeDecl()) {
2106 const FunctionDecl *Func = dyn_cast<FunctionDecl>(FD);
2107 bool HasWarnUnusedResultAttr = Func ? Func->hasUnusedResultAttr()
2108 : FD->hasAttr<WarnUnusedResultAttr>();
2110 // If the callee has attribute pure, const, or warn_unused_result, warn
2111 // about it. void foo() { strlen("bar"); } should warn.
2113 // Note: If new cases are added here, DiagnoseUnusedExprResult should be
2114 // updated to match for QoI.
2115 if (HasWarnUnusedResultAttr ||
2116 FD->hasAttr<PureAttr>() || FD->hasAttr<ConstAttr>()) {
2118 Loc = CE->getCallee()->getLocStart();
2119 R1 = CE->getCallee()->getSourceRange();
2121 if (unsigned NumArgs = CE->getNumArgs())
2122 R2 = SourceRange(CE->getArg(0)->getLocStart(),
2123 CE->getArg(NumArgs-1)->getLocEnd());
2130 // If we don't know precisely what we're looking at, let's not warn.
2131 case UnresolvedLookupExprClass:
2132 case CXXUnresolvedConstructExprClass:
2135 case CXXTemporaryObjectExprClass:
2136 case CXXConstructExprClass: {
2137 if (const CXXRecordDecl *Type = getType()->getAsCXXRecordDecl()) {
2138 if (Type->hasAttr<WarnUnusedAttr>()) {
2140 Loc = getLocStart();
2141 R1 = getSourceRange();
2148 case ObjCMessageExprClass: {
2149 const ObjCMessageExpr *ME = cast<ObjCMessageExpr>(this);
2150 if (Ctx.getLangOpts().ObjCAutoRefCount &&
2151 ME->isInstanceMessage() &&
2152 !ME->getType()->isVoidType() &&
2153 ME->getMethodFamily() == OMF_init) {
2156 R1 = ME->getSourceRange();
2160 if (const ObjCMethodDecl *MD = ME->getMethodDecl())
2161 if (MD->hasAttr<WarnUnusedResultAttr>()) {
2170 case ObjCPropertyRefExprClass:
2173 R1 = getSourceRange();
2176 case PseudoObjectExprClass: {
2177 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
2179 // Only complain about things that have the form of a getter.
2180 if (isa<UnaryOperator>(PO->getSyntacticForm()) ||
2181 isa<BinaryOperator>(PO->getSyntacticForm()))
2186 R1 = getSourceRange();
2190 case StmtExprClass: {
2191 // Statement exprs don't logically have side effects themselves, but are
2192 // sometimes used in macros in ways that give them a type that is unused.
2193 // For example ({ blah; foo(); }) will end up with a type if foo has a type.
2194 // however, if the result of the stmt expr is dead, we don't want to emit a
2196 const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt();
2197 if (!CS->body_empty()) {
2198 if (const Expr *E = dyn_cast<Expr>(CS->body_back()))
2199 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2200 if (const LabelStmt *Label = dyn_cast<LabelStmt>(CS->body_back()))
2201 if (const Expr *E = dyn_cast<Expr>(Label->getSubStmt()))
2202 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2205 if (getType()->isVoidType())
2208 Loc = cast<StmtExpr>(this)->getLParenLoc();
2209 R1 = getSourceRange();
2212 case CXXFunctionalCastExprClass:
2213 case CStyleCastExprClass: {
2214 // Ignore an explicit cast to void unless the operand is a non-trivial
2216 const CastExpr *CE = cast<CastExpr>(this);
2217 if (CE->getCastKind() == CK_ToVoid) {
2218 if (CE->getSubExpr()->isGLValue() &&
2219 CE->getSubExpr()->getType().isVolatileQualified()) {
2220 const DeclRefExpr *DRE =
2221 dyn_cast<DeclRefExpr>(CE->getSubExpr()->IgnoreParens());
2222 if (!(DRE && isa<VarDecl>(DRE->getDecl()) &&
2223 cast<VarDecl>(DRE->getDecl())->hasLocalStorage())) {
2224 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc,
2231 // If this is a cast to a constructor conversion, check the operand.
2232 // Otherwise, the result of the cast is unused.
2233 if (CE->getCastKind() == CK_ConstructorConversion)
2234 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2237 if (const CXXFunctionalCastExpr *CXXCE =
2238 dyn_cast<CXXFunctionalCastExpr>(this)) {
2239 Loc = CXXCE->getLocStart();
2240 R1 = CXXCE->getSubExpr()->getSourceRange();
2242 const CStyleCastExpr *CStyleCE = cast<CStyleCastExpr>(this);
2243 Loc = CStyleCE->getLParenLoc();
2244 R1 = CStyleCE->getSubExpr()->getSourceRange();
2248 case ImplicitCastExprClass: {
2249 const CastExpr *ICE = cast<ImplicitCastExpr>(this);
2251 // lvalue-to-rvalue conversion on a volatile lvalue is a side-effect.
2252 if (ICE->getCastKind() == CK_LValueToRValue &&
2253 ICE->getSubExpr()->getType().isVolatileQualified())
2256 return ICE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2258 case CXXDefaultArgExprClass:
2259 return (cast<CXXDefaultArgExpr>(this)
2260 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2261 case CXXDefaultInitExprClass:
2262 return (cast<CXXDefaultInitExpr>(this)
2263 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2265 case CXXNewExprClass:
2266 // FIXME: In theory, there might be new expressions that don't have side
2267 // effects (e.g. a placement new with an uninitialized POD).
2268 case CXXDeleteExprClass:
2270 case MaterializeTemporaryExprClass:
2271 return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
2272 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2273 case CXXBindTemporaryExprClass:
2274 return cast<CXXBindTemporaryExpr>(this)->getSubExpr()
2275 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2276 case ExprWithCleanupsClass:
2277 return cast<ExprWithCleanups>(this)->getSubExpr()
2278 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2282 /// isOBJCGCCandidate - Check if an expression is objc gc'able.
2283 /// returns true, if it is; false otherwise.
2284 bool Expr::isOBJCGCCandidate(ASTContext &Ctx) const {
2285 const Expr *E = IgnoreParens();
2286 switch (E->getStmtClass()) {
2289 case ObjCIvarRefExprClass:
2291 case Expr::UnaryOperatorClass:
2292 return cast<UnaryOperator>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2293 case ImplicitCastExprClass:
2294 return cast<ImplicitCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2295 case MaterializeTemporaryExprClass:
2296 return cast<MaterializeTemporaryExpr>(E)->GetTemporaryExpr()
2297 ->isOBJCGCCandidate(Ctx);
2298 case CStyleCastExprClass:
2299 return cast<CStyleCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2300 case DeclRefExprClass: {
2301 const Decl *D = cast<DeclRefExpr>(E)->getDecl();
2303 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
2304 if (VD->hasGlobalStorage())
2306 QualType T = VD->getType();
2307 // dereferencing to a pointer is always a gc'able candidate,
2308 // unless it is __weak.
2309 return T->isPointerType() &&
2310 (Ctx.getObjCGCAttrKind(T) != Qualifiers::Weak);
2314 case MemberExprClass: {
2315 const MemberExpr *M = cast<MemberExpr>(E);
2316 return M->getBase()->isOBJCGCCandidate(Ctx);
2318 case ArraySubscriptExprClass:
2319 return cast<ArraySubscriptExpr>(E)->getBase()->isOBJCGCCandidate(Ctx);
2323 bool Expr::isBoundMemberFunction(ASTContext &Ctx) const {
2324 if (isTypeDependent())
2326 return ClassifyLValue(Ctx) == Expr::LV_MemberFunction;
2329 QualType Expr::findBoundMemberType(const Expr *expr) {
2330 assert(expr->hasPlaceholderType(BuiltinType::BoundMember));
2332 // Bound member expressions are always one of these possibilities:
2333 // x->m x.m x->*y x.*y
2334 // (possibly parenthesized)
2336 expr = expr->IgnoreParens();
2337 if (const MemberExpr *mem = dyn_cast<MemberExpr>(expr)) {
2338 assert(isa<CXXMethodDecl>(mem->getMemberDecl()));
2339 return mem->getMemberDecl()->getType();
2342 if (const BinaryOperator *op = dyn_cast<BinaryOperator>(expr)) {
2343 QualType type = op->getRHS()->getType()->castAs<MemberPointerType>()
2345 assert(type->isFunctionType());
2349 assert(isa<UnresolvedMemberExpr>(expr) || isa<CXXPseudoDestructorExpr>(expr));
2353 Expr* Expr::IgnoreParens() {
2356 if (ParenExpr* P = dyn_cast<ParenExpr>(E)) {
2357 E = P->getSubExpr();
2360 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) {
2361 if (P->getOpcode() == UO_Extension) {
2362 E = P->getSubExpr();
2366 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) {
2367 if (!P->isResultDependent()) {
2368 E = P->getResultExpr();
2372 if (ChooseExpr* P = dyn_cast<ChooseExpr>(E)) {
2373 if (!P->isConditionDependent()) {
2374 E = P->getChosenSubExpr();
2382 /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr
2383 /// or CastExprs or ImplicitCastExprs, returning their operand.
2384 Expr *Expr::IgnoreParenCasts() {
2387 E = E->IgnoreParens();
2388 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2389 E = P->getSubExpr();
2392 if (MaterializeTemporaryExpr *Materialize
2393 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2394 E = Materialize->GetTemporaryExpr();
2397 if (SubstNonTypeTemplateParmExpr *NTTP
2398 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2399 E = NTTP->getReplacement();
2406 Expr *Expr::IgnoreCasts() {
2409 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2410 E = P->getSubExpr();
2413 if (MaterializeTemporaryExpr *Materialize
2414 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2415 E = Materialize->GetTemporaryExpr();
2418 if (SubstNonTypeTemplateParmExpr *NTTP
2419 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2420 E = NTTP->getReplacement();
2427 /// IgnoreParenLValueCasts - Ignore parentheses and lvalue-to-rvalue
2428 /// casts. This is intended purely as a temporary workaround for code
2429 /// that hasn't yet been rewritten to do the right thing about those
2430 /// casts, and may disappear along with the last internal use.
2431 Expr *Expr::IgnoreParenLValueCasts() {
2434 E = E->IgnoreParens();
2435 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2436 if (P->getCastKind() == CK_LValueToRValue) {
2437 E = P->getSubExpr();
2440 } else if (MaterializeTemporaryExpr *Materialize
2441 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2442 E = Materialize->GetTemporaryExpr();
2444 } else if (SubstNonTypeTemplateParmExpr *NTTP
2445 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2446 E = NTTP->getReplacement();
2454 Expr *Expr::ignoreParenBaseCasts() {
2457 E = E->IgnoreParens();
2458 if (CastExpr *CE = dyn_cast<CastExpr>(E)) {
2459 if (CE->getCastKind() == CK_DerivedToBase ||
2460 CE->getCastKind() == CK_UncheckedDerivedToBase ||
2461 CE->getCastKind() == CK_NoOp) {
2462 E = CE->getSubExpr();
2471 Expr *Expr::IgnoreParenImpCasts() {
2474 E = E->IgnoreParens();
2475 if (ImplicitCastExpr *P = dyn_cast<ImplicitCastExpr>(E)) {
2476 E = P->getSubExpr();
2479 if (MaterializeTemporaryExpr *Materialize
2480 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2481 E = Materialize->GetTemporaryExpr();
2484 if (SubstNonTypeTemplateParmExpr *NTTP
2485 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2486 E = NTTP->getReplacement();
2493 Expr *Expr::IgnoreConversionOperator() {
2494 if (CXXMemberCallExpr *MCE = dyn_cast<CXXMemberCallExpr>(this)) {
2495 if (MCE->getMethodDecl() && isa<CXXConversionDecl>(MCE->getMethodDecl()))
2496 return MCE->getImplicitObjectArgument();
2501 /// IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the
2502 /// value (including ptr->int casts of the same size). Strip off any
2503 /// ParenExpr or CastExprs, returning their operand.
2504 Expr *Expr::IgnoreParenNoopCasts(ASTContext &Ctx) {
2507 E = E->IgnoreParens();
2509 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2510 // We ignore integer <-> casts that are of the same width, ptr<->ptr and
2511 // ptr<->int casts of the same width. We also ignore all identity casts.
2512 Expr *SE = P->getSubExpr();
2514 if (Ctx.hasSameUnqualifiedType(E->getType(), SE->getType())) {
2519 if ((E->getType()->isPointerType() ||
2520 E->getType()->isIntegralType(Ctx)) &&
2521 (SE->getType()->isPointerType() ||
2522 SE->getType()->isIntegralType(Ctx)) &&
2523 Ctx.getTypeSize(E->getType()) == Ctx.getTypeSize(SE->getType())) {
2529 if (SubstNonTypeTemplateParmExpr *NTTP
2530 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2531 E = NTTP->getReplacement();
2539 bool Expr::isDefaultArgument() const {
2540 const Expr *E = this;
2541 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2542 E = M->GetTemporaryExpr();
2544 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E))
2545 E = ICE->getSubExprAsWritten();
2547 return isa<CXXDefaultArgExpr>(E);
2550 /// \brief Skip over any no-op casts and any temporary-binding
2552 static const Expr *skipTemporaryBindingsNoOpCastsAndParens(const Expr *E) {
2553 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2554 E = M->GetTemporaryExpr();
2556 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2557 if (ICE->getCastKind() == CK_NoOp)
2558 E = ICE->getSubExpr();
2563 while (const CXXBindTemporaryExpr *BE = dyn_cast<CXXBindTemporaryExpr>(E))
2564 E = BE->getSubExpr();
2566 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2567 if (ICE->getCastKind() == CK_NoOp)
2568 E = ICE->getSubExpr();
2573 return E->IgnoreParens();
2576 /// isTemporaryObject - Determines if this expression produces a
2577 /// temporary of the given class type.
2578 bool Expr::isTemporaryObject(ASTContext &C, const CXXRecordDecl *TempTy) const {
2579 if (!C.hasSameUnqualifiedType(getType(), C.getTypeDeclType(TempTy)))
2582 const Expr *E = skipTemporaryBindingsNoOpCastsAndParens(this);
2584 // Temporaries are by definition pr-values of class type.
2585 if (!E->Classify(C).isPRValue()) {
2586 // In this context, property reference is a message call and is pr-value.
2587 if (!isa<ObjCPropertyRefExpr>(E))
2591 // Black-list a few cases which yield pr-values of class type that don't
2592 // refer to temporaries of that type:
2594 // - implicit derived-to-base conversions
2595 if (isa<ImplicitCastExpr>(E)) {
2596 switch (cast<ImplicitCastExpr>(E)->getCastKind()) {
2597 case CK_DerivedToBase:
2598 case CK_UncheckedDerivedToBase:
2605 // - member expressions (all)
2606 if (isa<MemberExpr>(E))
2609 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E))
2610 if (BO->isPtrMemOp())
2613 // - opaque values (all)
2614 if (isa<OpaqueValueExpr>(E))
2620 bool Expr::isImplicitCXXThis() const {
2621 const Expr *E = this;
2623 // Strip away parentheses and casts we don't care about.
2625 if (const ParenExpr *Paren = dyn_cast<ParenExpr>(E)) {
2626 E = Paren->getSubExpr();
2630 if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2631 if (ICE->getCastKind() == CK_NoOp ||
2632 ICE->getCastKind() == CK_LValueToRValue ||
2633 ICE->getCastKind() == CK_DerivedToBase ||
2634 ICE->getCastKind() == CK_UncheckedDerivedToBase) {
2635 E = ICE->getSubExpr();
2640 if (const UnaryOperator* UnOp = dyn_cast<UnaryOperator>(E)) {
2641 if (UnOp->getOpcode() == UO_Extension) {
2642 E = UnOp->getSubExpr();
2647 if (const MaterializeTemporaryExpr *M
2648 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2649 E = M->GetTemporaryExpr();
2656 if (const CXXThisExpr *This = dyn_cast<CXXThisExpr>(E))
2657 return This->isImplicit();
2662 /// hasAnyTypeDependentArguments - Determines if any of the expressions
2663 /// in Exprs is type-dependent.
2664 bool Expr::hasAnyTypeDependentArguments(ArrayRef<Expr *> Exprs) {
2665 for (unsigned I = 0; I < Exprs.size(); ++I)
2666 if (Exprs[I]->isTypeDependent())
2672 bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef,
2673 const Expr **Culprit) const {
2674 // This function is attempting whether an expression is an initializer
2675 // which can be evaluated at compile-time. It very closely parallels
2676 // ConstExprEmitter in CGExprConstant.cpp; if they don't match, it
2677 // will lead to unexpected results. Like ConstExprEmitter, it falls back
2678 // to isEvaluatable most of the time.
2680 // If we ever capture reference-binding directly in the AST, we can
2681 // kill the second parameter.
2685 if (EvaluateAsLValue(Result, Ctx) && !Result.HasSideEffects)
2692 switch (getStmtClass()) {
2694 case StringLiteralClass:
2695 case ObjCEncodeExprClass:
2697 case CXXTemporaryObjectExprClass:
2698 case CXXConstructExprClass: {
2699 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
2701 if (CE->getConstructor()->isTrivial() &&
2702 CE->getConstructor()->getParent()->hasTrivialDestructor()) {
2703 // Trivial default constructor
2704 if (!CE->getNumArgs()) return true;
2706 // Trivial copy constructor
2707 assert(CE->getNumArgs() == 1 && "trivial ctor with > 1 argument");
2708 return CE->getArg(0)->isConstantInitializer(Ctx, false, Culprit);
2713 case CompoundLiteralExprClass: {
2714 // This handles gcc's extension that allows global initializers like
2715 // "struct x {int x;} x = (struct x) {};".
2716 // FIXME: This accepts other cases it shouldn't!
2717 const Expr *Exp = cast<CompoundLiteralExpr>(this)->getInitializer();
2718 return Exp->isConstantInitializer(Ctx, false, Culprit);
2720 case DesignatedInitUpdateExprClass: {
2721 const DesignatedInitUpdateExpr *DIUE = cast<DesignatedInitUpdateExpr>(this);
2722 return DIUE->getBase()->isConstantInitializer(Ctx, false, Culprit) &&
2723 DIUE->getUpdater()->isConstantInitializer(Ctx, false, Culprit);
2725 case InitListExprClass: {
2726 const InitListExpr *ILE = cast<InitListExpr>(this);
2727 if (ILE->getType()->isArrayType()) {
2728 unsigned numInits = ILE->getNumInits();
2729 for (unsigned i = 0; i < numInits; i++) {
2730 if (!ILE->getInit(i)->isConstantInitializer(Ctx, false, Culprit))
2736 if (ILE->getType()->isRecordType()) {
2737 unsigned ElementNo = 0;
2738 RecordDecl *RD = ILE->getType()->getAs<RecordType>()->getDecl();
2739 for (const auto *Field : RD->fields()) {
2740 // If this is a union, skip all the fields that aren't being initialized.
2741 if (RD->isUnion() && ILE->getInitializedFieldInUnion() != Field)
2744 // Don't emit anonymous bitfields, they just affect layout.
2745 if (Field->isUnnamedBitfield())
2748 if (ElementNo < ILE->getNumInits()) {
2749 const Expr *Elt = ILE->getInit(ElementNo++);
2750 if (Field->isBitField()) {
2751 // Bitfields have to evaluate to an integer.
2752 llvm::APSInt ResultTmp;
2753 if (!Elt->EvaluateAsInt(ResultTmp, Ctx)) {
2759 bool RefType = Field->getType()->isReferenceType();
2760 if (!Elt->isConstantInitializer(Ctx, RefType, Culprit))
2770 case ImplicitValueInitExprClass:
2771 case NoInitExprClass:
2773 case ParenExprClass:
2774 return cast<ParenExpr>(this)->getSubExpr()
2775 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2776 case GenericSelectionExprClass:
2777 return cast<GenericSelectionExpr>(this)->getResultExpr()
2778 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2779 case ChooseExprClass:
2780 if (cast<ChooseExpr>(this)->isConditionDependent()) {
2785 return cast<ChooseExpr>(this)->getChosenSubExpr()
2786 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2787 case UnaryOperatorClass: {
2788 const UnaryOperator* Exp = cast<UnaryOperator>(this);
2789 if (Exp->getOpcode() == UO_Extension)
2790 return Exp->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
2793 case CXXFunctionalCastExprClass:
2794 case CXXStaticCastExprClass:
2795 case ImplicitCastExprClass:
2796 case CStyleCastExprClass:
2797 case ObjCBridgedCastExprClass:
2798 case CXXDynamicCastExprClass:
2799 case CXXReinterpretCastExprClass:
2800 case CXXConstCastExprClass: {
2801 const CastExpr *CE = cast<CastExpr>(this);
2803 // Handle misc casts we want to ignore.
2804 if (CE->getCastKind() == CK_NoOp ||
2805 CE->getCastKind() == CK_LValueToRValue ||
2806 CE->getCastKind() == CK_ToUnion ||
2807 CE->getCastKind() == CK_ConstructorConversion ||
2808 CE->getCastKind() == CK_NonAtomicToAtomic ||
2809 CE->getCastKind() == CK_AtomicToNonAtomic ||
2810 CE->getCastKind() == CK_IntToOCLSampler)
2811 return CE->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
2815 case MaterializeTemporaryExprClass:
2816 return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
2817 ->isConstantInitializer(Ctx, false, Culprit);
2819 case SubstNonTypeTemplateParmExprClass:
2820 return cast<SubstNonTypeTemplateParmExpr>(this)->getReplacement()
2821 ->isConstantInitializer(Ctx, false, Culprit);
2822 case CXXDefaultArgExprClass:
2823 return cast<CXXDefaultArgExpr>(this)->getExpr()
2824 ->isConstantInitializer(Ctx, false, Culprit);
2825 case CXXDefaultInitExprClass:
2826 return cast<CXXDefaultInitExpr>(this)->getExpr()
2827 ->isConstantInitializer(Ctx, false, Culprit);
2829 // Allow certain forms of UB in constant initializers: signed integer
2830 // overflow and floating-point division by zero. We'll give a warning on
2831 // these, but they're common enough that we have to accept them.
2832 if (isEvaluatable(Ctx, SE_AllowUndefinedBehavior))
2840 /// \brief Look for any side effects within a Stmt.
2841 class SideEffectFinder : public ConstEvaluatedExprVisitor<SideEffectFinder> {
2842 typedef ConstEvaluatedExprVisitor<SideEffectFinder> Inherited;
2843 const bool IncludePossibleEffects;
2844 bool HasSideEffects;
2847 explicit SideEffectFinder(const ASTContext &Context, bool IncludePossible)
2848 : Inherited(Context),
2849 IncludePossibleEffects(IncludePossible), HasSideEffects(false) { }
2851 bool hasSideEffects() const { return HasSideEffects; }
2853 void VisitExpr(const Expr *E) {
2854 if (!HasSideEffects &&
2855 E->HasSideEffects(Context, IncludePossibleEffects))
2856 HasSideEffects = true;
2861 bool Expr::HasSideEffects(const ASTContext &Ctx,
2862 bool IncludePossibleEffects) const {
2863 // In circumstances where we care about definite side effects instead of
2864 // potential side effects, we want to ignore expressions that are part of a
2865 // macro expansion as a potential side effect.
2866 if (!IncludePossibleEffects && getExprLoc().isMacroID())
2869 if (isInstantiationDependent())
2870 return IncludePossibleEffects;
2872 switch (getStmtClass()) {
2874 #define ABSTRACT_STMT(Type)
2875 #define STMT(Type, Base) case Type##Class:
2876 #define EXPR(Type, Base)
2877 #include "clang/AST/StmtNodes.inc"
2878 llvm_unreachable("unexpected Expr kind");
2880 case DependentScopeDeclRefExprClass:
2881 case CXXUnresolvedConstructExprClass:
2882 case CXXDependentScopeMemberExprClass:
2883 case UnresolvedLookupExprClass:
2884 case UnresolvedMemberExprClass:
2885 case PackExpansionExprClass:
2886 case SubstNonTypeTemplateParmPackExprClass:
2887 case FunctionParmPackExprClass:
2889 case CXXFoldExprClass:
2890 llvm_unreachable("shouldn't see dependent / unresolved nodes here");
2892 case DeclRefExprClass:
2893 case ObjCIvarRefExprClass:
2894 case PredefinedExprClass:
2895 case IntegerLiteralClass:
2896 case FloatingLiteralClass:
2897 case ImaginaryLiteralClass:
2898 case StringLiteralClass:
2899 case CharacterLiteralClass:
2900 case OffsetOfExprClass:
2901 case ImplicitValueInitExprClass:
2902 case UnaryExprOrTypeTraitExprClass:
2903 case AddrLabelExprClass:
2904 case GNUNullExprClass:
2905 case ArrayInitIndexExprClass:
2906 case NoInitExprClass:
2907 case CXXBoolLiteralExprClass:
2908 case CXXNullPtrLiteralExprClass:
2909 case CXXThisExprClass:
2910 case CXXScalarValueInitExprClass:
2911 case TypeTraitExprClass:
2912 case ArrayTypeTraitExprClass:
2913 case ExpressionTraitExprClass:
2914 case CXXNoexceptExprClass:
2915 case SizeOfPackExprClass:
2916 case ObjCStringLiteralClass:
2917 case ObjCEncodeExprClass:
2918 case ObjCBoolLiteralExprClass:
2919 case ObjCAvailabilityCheckExprClass:
2920 case CXXUuidofExprClass:
2921 case OpaqueValueExprClass:
2922 // These never have a side-effect.
2926 case CXXOperatorCallExprClass:
2927 case CXXMemberCallExprClass:
2928 case CUDAKernelCallExprClass:
2929 case UserDefinedLiteralClass: {
2930 // We don't know a call definitely has side effects, except for calls
2931 // to pure/const functions that definitely don't.
2932 // If the call itself is considered side-effect free, check the operands.
2933 const Decl *FD = cast<CallExpr>(this)->getCalleeDecl();
2934 bool IsPure = FD && (FD->hasAttr<ConstAttr>() || FD->hasAttr<PureAttr>());
2935 if (IsPure || !IncludePossibleEffects)
2940 case BlockExprClass:
2941 case CXXBindTemporaryExprClass:
2942 if (!IncludePossibleEffects)
2946 case MSPropertyRefExprClass:
2947 case MSPropertySubscriptExprClass:
2948 case CompoundAssignOperatorClass:
2949 case VAArgExprClass:
2950 case AtomicExprClass:
2951 case CXXThrowExprClass:
2952 case CXXNewExprClass:
2953 case CXXDeleteExprClass:
2954 case CoawaitExprClass:
2955 case CoyieldExprClass:
2956 // These always have a side-effect.
2959 case StmtExprClass: {
2960 // StmtExprs have a side-effect if any substatement does.
2961 SideEffectFinder Finder(Ctx, IncludePossibleEffects);
2962 Finder.Visit(cast<StmtExpr>(this)->getSubStmt());
2963 return Finder.hasSideEffects();
2966 case ExprWithCleanupsClass:
2967 if (IncludePossibleEffects)
2968 if (cast<ExprWithCleanups>(this)->cleanupsHaveSideEffects())
2972 case ParenExprClass:
2973 case ArraySubscriptExprClass:
2974 case OMPArraySectionExprClass:
2975 case MemberExprClass:
2976 case ConditionalOperatorClass:
2977 case BinaryConditionalOperatorClass:
2978 case CompoundLiteralExprClass:
2979 case ExtVectorElementExprClass:
2980 case DesignatedInitExprClass:
2981 case DesignatedInitUpdateExprClass:
2982 case ArrayInitLoopExprClass:
2983 case ParenListExprClass:
2984 case CXXPseudoDestructorExprClass:
2985 case CXXStdInitializerListExprClass:
2986 case SubstNonTypeTemplateParmExprClass:
2987 case MaterializeTemporaryExprClass:
2988 case ShuffleVectorExprClass:
2989 case ConvertVectorExprClass:
2990 case AsTypeExprClass:
2991 // These have a side-effect if any subexpression does.
2994 case UnaryOperatorClass:
2995 if (cast<UnaryOperator>(this)->isIncrementDecrementOp())
2999 case BinaryOperatorClass:
3000 if (cast<BinaryOperator>(this)->isAssignmentOp())
3004 case InitListExprClass:
3005 // FIXME: The children for an InitListExpr doesn't include the array filler.
3006 if (const Expr *E = cast<InitListExpr>(this)->getArrayFiller())
3007 if (E->HasSideEffects(Ctx, IncludePossibleEffects))
3011 case GenericSelectionExprClass:
3012 return cast<GenericSelectionExpr>(this)->getResultExpr()->
3013 HasSideEffects(Ctx, IncludePossibleEffects);
3015 case ChooseExprClass:
3016 return cast<ChooseExpr>(this)->getChosenSubExpr()->HasSideEffects(
3017 Ctx, IncludePossibleEffects);
3019 case CXXDefaultArgExprClass:
3020 return cast<CXXDefaultArgExpr>(this)->getExpr()->HasSideEffects(
3021 Ctx, IncludePossibleEffects);
3023 case CXXDefaultInitExprClass: {
3024 const FieldDecl *FD = cast<CXXDefaultInitExpr>(this)->getField();
3025 if (const Expr *E = FD->getInClassInitializer())
3026 return E->HasSideEffects(Ctx, IncludePossibleEffects);
3027 // If we've not yet parsed the initializer, assume it has side-effects.
3031 case CXXDynamicCastExprClass: {
3032 // A dynamic_cast expression has side-effects if it can throw.
3033 const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(this);
3034 if (DCE->getTypeAsWritten()->isReferenceType() &&
3035 DCE->getCastKind() == CK_Dynamic)
3038 case ImplicitCastExprClass:
3039 case CStyleCastExprClass:
3040 case CXXStaticCastExprClass:
3041 case CXXReinterpretCastExprClass:
3042 case CXXConstCastExprClass:
3043 case CXXFunctionalCastExprClass: {
3044 // While volatile reads are side-effecting in both C and C++, we treat them
3045 // as having possible (not definite) side-effects. This allows idiomatic
3046 // code to behave without warning, such as sizeof(*v) for a volatile-
3047 // qualified pointer.
3048 if (!IncludePossibleEffects)
3051 const CastExpr *CE = cast<CastExpr>(this);
3052 if (CE->getCastKind() == CK_LValueToRValue &&
3053 CE->getSubExpr()->getType().isVolatileQualified())
3058 case CXXTypeidExprClass:
3059 // typeid might throw if its subexpression is potentially-evaluated, so has
3060 // side-effects in that case whether or not its subexpression does.
3061 return cast<CXXTypeidExpr>(this)->isPotentiallyEvaluated();
3063 case CXXConstructExprClass:
3064 case CXXTemporaryObjectExprClass: {
3065 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
3066 if (!CE->getConstructor()->isTrivial() && IncludePossibleEffects)
3068 // A trivial constructor does not add any side-effects of its own. Just look
3069 // at its arguments.
3073 case CXXInheritedCtorInitExprClass: {
3074 const auto *ICIE = cast<CXXInheritedCtorInitExpr>(this);
3075 if (!ICIE->getConstructor()->isTrivial() && IncludePossibleEffects)
3080 case LambdaExprClass: {
3081 const LambdaExpr *LE = cast<LambdaExpr>(this);
3082 for (LambdaExpr::capture_iterator I = LE->capture_begin(),
3083 E = LE->capture_end(); I != E; ++I)
3084 if (I->getCaptureKind() == LCK_ByCopy)
3085 // FIXME: Only has a side-effect if the variable is volatile or if
3086 // the copy would invoke a non-trivial copy constructor.
3091 case PseudoObjectExprClass: {
3092 // Only look for side-effects in the semantic form, and look past
3093 // OpaqueValueExpr bindings in that form.
3094 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
3095 for (PseudoObjectExpr::const_semantics_iterator I = PO->semantics_begin(),
3096 E = PO->semantics_end();
3098 const Expr *Subexpr = *I;
3099 if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(Subexpr))
3100 Subexpr = OVE->getSourceExpr();
3101 if (Subexpr->HasSideEffects(Ctx, IncludePossibleEffects))
3107 case ObjCBoxedExprClass:
3108 case ObjCArrayLiteralClass:
3109 case ObjCDictionaryLiteralClass:
3110 case ObjCSelectorExprClass:
3111 case ObjCProtocolExprClass:
3112 case ObjCIsaExprClass:
3113 case ObjCIndirectCopyRestoreExprClass:
3114 case ObjCSubscriptRefExprClass:
3115 case ObjCBridgedCastExprClass:
3116 case ObjCMessageExprClass:
3117 case ObjCPropertyRefExprClass:
3118 // FIXME: Classify these cases better.
3119 if (IncludePossibleEffects)
3124 // Recurse to children.
3125 for (const Stmt *SubStmt : children())
3127 cast<Expr>(SubStmt)->HasSideEffects(Ctx, IncludePossibleEffects))
3134 /// \brief Look for a call to a non-trivial function within an expression.
3135 class NonTrivialCallFinder : public ConstEvaluatedExprVisitor<NonTrivialCallFinder>
3137 typedef ConstEvaluatedExprVisitor<NonTrivialCallFinder> Inherited;
3142 explicit NonTrivialCallFinder(const ASTContext &Context)
3143 : Inherited(Context), NonTrivial(false) { }
3145 bool hasNonTrivialCall() const { return NonTrivial; }
3147 void VisitCallExpr(const CallExpr *E) {
3148 if (const CXXMethodDecl *Method
3149 = dyn_cast_or_null<const CXXMethodDecl>(E->getCalleeDecl())) {
3150 if (Method->isTrivial()) {
3151 // Recurse to children of the call.
3152 Inherited::VisitStmt(E);
3160 void VisitCXXConstructExpr(const CXXConstructExpr *E) {
3161 if (E->getConstructor()->isTrivial()) {
3162 // Recurse to children of the call.
3163 Inherited::VisitStmt(E);
3170 void VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *E) {
3171 if (E->getTemporary()->getDestructor()->isTrivial()) {
3172 Inherited::VisitStmt(E);
3181 bool Expr::hasNonTrivialCall(const ASTContext &Ctx) const {
3182 NonTrivialCallFinder Finder(Ctx);
3184 return Finder.hasNonTrivialCall();
3187 /// isNullPointerConstant - C99 6.3.2.3p3 - Return whether this is a null
3188 /// pointer constant or not, as well as the specific kind of constant detected.
3189 /// Null pointer constants can be integer constant expressions with the
3190 /// value zero, casts of zero to void*, nullptr (C++0X), or __null
3191 /// (a GNU extension).
3192 Expr::NullPointerConstantKind
3193 Expr::isNullPointerConstant(ASTContext &Ctx,
3194 NullPointerConstantValueDependence NPC) const {
3195 if (isValueDependent() &&
3196 (!Ctx.getLangOpts().CPlusPlus11 || Ctx.getLangOpts().MSVCCompat)) {
3198 case NPC_NeverValueDependent:
3199 llvm_unreachable("Unexpected value dependent expression!");
3200 case NPC_ValueDependentIsNull:
3201 if (isTypeDependent() || getType()->isIntegralType(Ctx))
3202 return NPCK_ZeroExpression;
3204 return NPCK_NotNull;
3206 case NPC_ValueDependentIsNotNull:
3207 return NPCK_NotNull;
3211 // Strip off a cast to void*, if it exists. Except in C++.
3212 if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) {
3213 if (!Ctx.getLangOpts().CPlusPlus) {
3214 // Check that it is a cast to void*.
3215 if (const PointerType *PT = CE->getType()->getAs<PointerType>()) {
3216 QualType Pointee = PT->getPointeeType();
3217 Qualifiers Q = Pointee.getQualifiers();
3218 // In OpenCL v2.0 generic address space acts as a placeholder
3219 // and should be ignored.
3220 bool IsASValid = true;
3221 if (Ctx.getLangOpts().OpenCLVersion >= 200) {
3222 if (Pointee.getAddressSpace() == LangAS::opencl_generic)
3223 Q.removeAddressSpace();
3228 if (IsASValid && !Q.hasQualifiers() &&
3229 Pointee->isVoidType() && // to void*
3230 CE->getSubExpr()->getType()->isIntegerType()) // from int.
3231 return CE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3234 } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) {
3235 // Ignore the ImplicitCastExpr type entirely.
3236 return ICE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3237 } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) {
3238 // Accept ((void*)0) as a null pointer constant, as many other
3239 // implementations do.
3240 return PE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3241 } else if (const GenericSelectionExpr *GE =
3242 dyn_cast<GenericSelectionExpr>(this)) {
3243 if (GE->isResultDependent())
3244 return NPCK_NotNull;
3245 return GE->getResultExpr()->isNullPointerConstant(Ctx, NPC);
3246 } else if (const ChooseExpr *CE = dyn_cast<ChooseExpr>(this)) {
3247 if (CE->isConditionDependent())
3248 return NPCK_NotNull;
3249 return CE->getChosenSubExpr()->isNullPointerConstant(Ctx, NPC);
3250 } else if (const CXXDefaultArgExpr *DefaultArg
3251 = dyn_cast<CXXDefaultArgExpr>(this)) {
3252 // See through default argument expressions.
3253 return DefaultArg->getExpr()->isNullPointerConstant(Ctx, NPC);
3254 } else if (const CXXDefaultInitExpr *DefaultInit
3255 = dyn_cast<CXXDefaultInitExpr>(this)) {
3256 // See through default initializer expressions.
3257 return DefaultInit->getExpr()->isNullPointerConstant(Ctx, NPC);
3258 } else if (isa<GNUNullExpr>(this)) {
3259 // The GNU __null extension is always a null pointer constant.
3260 return NPCK_GNUNull;
3261 } else if (const MaterializeTemporaryExpr *M
3262 = dyn_cast<MaterializeTemporaryExpr>(this)) {
3263 return M->GetTemporaryExpr()->isNullPointerConstant(Ctx, NPC);
3264 } else if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(this)) {
3265 if (const Expr *Source = OVE->getSourceExpr())
3266 return Source->isNullPointerConstant(Ctx, NPC);
3269 // C++11 nullptr_t is always a null pointer constant.
3270 if (getType()->isNullPtrType())
3271 return NPCK_CXX11_nullptr;
3273 if (const RecordType *UT = getType()->getAsUnionType())
3274 if (!Ctx.getLangOpts().CPlusPlus11 &&
3275 UT && UT->getDecl()->hasAttr<TransparentUnionAttr>())
3276 if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(this)){
3277 const Expr *InitExpr = CLE->getInitializer();
3278 if (const InitListExpr *ILE = dyn_cast<InitListExpr>(InitExpr))
3279 return ILE->getInit(0)->isNullPointerConstant(Ctx, NPC);
3281 // This expression must be an integer type.
3282 if (!getType()->isIntegerType() ||
3283 (Ctx.getLangOpts().CPlusPlus && getType()->isEnumeralType()))
3284 return NPCK_NotNull;
3286 if (Ctx.getLangOpts().CPlusPlus11) {
3287 // C++11 [conv.ptr]p1: A null pointer constant is an integer literal with
3288 // value zero or a prvalue of type std::nullptr_t.
3289 // Microsoft mode permits C++98 rules reflecting MSVC behavior.
3290 const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(this);
3291 if (Lit && !Lit->getValue())
3292 return NPCK_ZeroLiteral;
3293 else if (!Ctx.getLangOpts().MSVCCompat || !isCXX98IntegralConstantExpr(Ctx))
3294 return NPCK_NotNull;
3296 // If we have an integer constant expression, we need to *evaluate* it and
3297 // test for the value 0.
3298 if (!isIntegerConstantExpr(Ctx))
3299 return NPCK_NotNull;
3302 if (EvaluateKnownConstInt(Ctx) != 0)
3303 return NPCK_NotNull;
3305 if (isa<IntegerLiteral>(this))
3306 return NPCK_ZeroLiteral;
3307 return NPCK_ZeroExpression;
3310 /// \brief If this expression is an l-value for an Objective C
3311 /// property, find the underlying property reference expression.
3312 const ObjCPropertyRefExpr *Expr::getObjCProperty() const {
3313 const Expr *E = this;
3315 assert((E->getValueKind() == VK_LValue &&
3316 E->getObjectKind() == OK_ObjCProperty) &&
3317 "expression is not a property reference");
3318 E = E->IgnoreParenCasts();
3319 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
3320 if (BO->getOpcode() == BO_Comma) {
3329 return cast<ObjCPropertyRefExpr>(E);
3332 bool Expr::isObjCSelfExpr() const {
3333 const Expr *E = IgnoreParenImpCasts();
3335 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E);
3339 const ImplicitParamDecl *Param = dyn_cast<ImplicitParamDecl>(DRE->getDecl());
3343 const ObjCMethodDecl *M = dyn_cast<ObjCMethodDecl>(Param->getDeclContext());
3347 return M->getSelfDecl() == Param;
3350 FieldDecl *Expr::getSourceBitField() {
3351 Expr *E = this->IgnoreParens();
3353 while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3354 if (ICE->getCastKind() == CK_LValueToRValue ||
3355 (ICE->getValueKind() != VK_RValue && ICE->getCastKind() == CK_NoOp))
3356 E = ICE->getSubExpr()->IgnoreParens();
3361 if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E))
3362 if (FieldDecl *Field = dyn_cast<FieldDecl>(MemRef->getMemberDecl()))
3363 if (Field->isBitField())
3366 if (ObjCIvarRefExpr *IvarRef = dyn_cast<ObjCIvarRefExpr>(E))
3367 if (FieldDecl *Ivar = dyn_cast<FieldDecl>(IvarRef->getDecl()))
3368 if (Ivar->isBitField())
3371 if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E)) {
3372 if (FieldDecl *Field = dyn_cast<FieldDecl>(DeclRef->getDecl()))
3373 if (Field->isBitField())
3376 if (BindingDecl *BD = dyn_cast<BindingDecl>(DeclRef->getDecl()))
3377 if (Expr *E = BD->getBinding())
3378 return E->getSourceBitField();
3381 if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(E)) {
3382 if (BinOp->isAssignmentOp() && BinOp->getLHS())
3383 return BinOp->getLHS()->getSourceBitField();
3385 if (BinOp->getOpcode() == BO_Comma && BinOp->getRHS())
3386 return BinOp->getRHS()->getSourceBitField();
3389 if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(E))
3390 if (UnOp->isPrefix() && UnOp->isIncrementDecrementOp())
3391 return UnOp->getSubExpr()->getSourceBitField();
3396 bool Expr::refersToVectorElement() const {
3397 // FIXME: Why do we not just look at the ObjectKind here?
3398 const Expr *E = this->IgnoreParens();
3400 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3401 if (ICE->getValueKind() != VK_RValue &&
3402 ICE->getCastKind() == CK_NoOp)
3403 E = ICE->getSubExpr()->IgnoreParens();
3408 if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E))
3409 return ASE->getBase()->getType()->isVectorType();
3411 if (isa<ExtVectorElementExpr>(E))
3414 if (auto *DRE = dyn_cast<DeclRefExpr>(E))
3415 if (auto *BD = dyn_cast<BindingDecl>(DRE->getDecl()))
3416 if (auto *E = BD->getBinding())
3417 return E->refersToVectorElement();
3422 bool Expr::refersToGlobalRegisterVar() const {
3423 const Expr *E = this->IgnoreParenImpCasts();
3425 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
3426 if (const auto *VD = dyn_cast<VarDecl>(DRE->getDecl()))
3427 if (VD->getStorageClass() == SC_Register &&
3428 VD->hasAttr<AsmLabelAttr>() && !VD->isLocalVarDecl())
3434 /// isArrow - Return true if the base expression is a pointer to vector,
3435 /// return false if the base expression is a vector.
3436 bool ExtVectorElementExpr::isArrow() const {
3437 return getBase()->getType()->isPointerType();
3440 unsigned ExtVectorElementExpr::getNumElements() const {
3441 if (const VectorType *VT = getType()->getAs<VectorType>())
3442 return VT->getNumElements();
3446 /// containsDuplicateElements - Return true if any element access is repeated.
3447 bool ExtVectorElementExpr::containsDuplicateElements() const {
3448 // FIXME: Refactor this code to an accessor on the AST node which returns the
3449 // "type" of component access, and share with code below and in Sema.
3450 StringRef Comp = Accessor->getName();
3452 // Halving swizzles do not contain duplicate elements.
3453 if (Comp == "hi" || Comp == "lo" || Comp == "even" || Comp == "odd")
3456 // Advance past s-char prefix on hex swizzles.
3457 if (Comp[0] == 's' || Comp[0] == 'S')
3458 Comp = Comp.substr(1);
3460 for (unsigned i = 0, e = Comp.size(); i != e; ++i)
3461 if (Comp.substr(i + 1).find(Comp[i]) != StringRef::npos)
3467 /// getEncodedElementAccess - We encode the fields as a llvm ConstantArray.
3468 void ExtVectorElementExpr::getEncodedElementAccess(
3469 SmallVectorImpl<uint32_t> &Elts) const {
3470 StringRef Comp = Accessor->getName();
3471 bool isNumericAccessor = false;
3472 if (Comp[0] == 's' || Comp[0] == 'S') {
3473 Comp = Comp.substr(1);
3474 isNumericAccessor = true;
3477 bool isHi = Comp == "hi";
3478 bool isLo = Comp == "lo";
3479 bool isEven = Comp == "even";
3480 bool isOdd = Comp == "odd";
3482 for (unsigned i = 0, e = getNumElements(); i != e; ++i) {
3494 Index = ExtVectorType::getAccessorIdx(Comp[i], isNumericAccessor);
3496 Elts.push_back(Index);
3500 ShuffleVectorExpr::ShuffleVectorExpr(const ASTContext &C, ArrayRef<Expr*> args,
3501 QualType Type, SourceLocation BLoc,
3503 : Expr(ShuffleVectorExprClass, Type, VK_RValue, OK_Ordinary,
3504 Type->isDependentType(), Type->isDependentType(),
3505 Type->isInstantiationDependentType(),
3506 Type->containsUnexpandedParameterPack()),
3507 BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(args.size())
3509 SubExprs = new (C) Stmt*[args.size()];
3510 for (unsigned i = 0; i != args.size(); i++) {
3511 if (args[i]->isTypeDependent())
3512 ExprBits.TypeDependent = true;
3513 if (args[i]->isValueDependent())
3514 ExprBits.ValueDependent = true;
3515 if (args[i]->isInstantiationDependent())
3516 ExprBits.InstantiationDependent = true;
3517 if (args[i]->containsUnexpandedParameterPack())
3518 ExprBits.ContainsUnexpandedParameterPack = true;
3520 SubExprs[i] = args[i];
3524 void ShuffleVectorExpr::setExprs(const ASTContext &C, ArrayRef<Expr *> Exprs) {
3525 if (SubExprs) C.Deallocate(SubExprs);
3527 this->NumExprs = Exprs.size();
3528 SubExprs = new (C) Stmt*[NumExprs];
3529 memcpy(SubExprs, Exprs.data(), sizeof(Expr *) * Exprs.size());
3532 GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
3533 SourceLocation GenericLoc, Expr *ControllingExpr,
3534 ArrayRef<TypeSourceInfo*> AssocTypes,
3535 ArrayRef<Expr*> AssocExprs,
3536 SourceLocation DefaultLoc,
3537 SourceLocation RParenLoc,
3538 bool ContainsUnexpandedParameterPack,
3539 unsigned ResultIndex)
3540 : Expr(GenericSelectionExprClass,
3541 AssocExprs[ResultIndex]->getType(),
3542 AssocExprs[ResultIndex]->getValueKind(),
3543 AssocExprs[ResultIndex]->getObjectKind(),
3544 AssocExprs[ResultIndex]->isTypeDependent(),
3545 AssocExprs[ResultIndex]->isValueDependent(),
3546 AssocExprs[ResultIndex]->isInstantiationDependent(),
3547 ContainsUnexpandedParameterPack),
3548 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3549 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3550 NumAssocs(AssocExprs.size()), ResultIndex(ResultIndex),
3551 GenericLoc(GenericLoc), DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3552 SubExprs[CONTROLLING] = ControllingExpr;
3553 assert(AssocTypes.size() == AssocExprs.size());
3554 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3555 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3558 GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
3559 SourceLocation GenericLoc, Expr *ControllingExpr,
3560 ArrayRef<TypeSourceInfo*> AssocTypes,
3561 ArrayRef<Expr*> AssocExprs,
3562 SourceLocation DefaultLoc,
3563 SourceLocation RParenLoc,
3564 bool ContainsUnexpandedParameterPack)
3565 : Expr(GenericSelectionExprClass,
3566 Context.DependentTy,
3569 /*isTypeDependent=*/true,
3570 /*isValueDependent=*/true,
3571 /*isInstantiationDependent=*/true,
3572 ContainsUnexpandedParameterPack),
3573 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3574 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3575 NumAssocs(AssocExprs.size()), ResultIndex(-1U), GenericLoc(GenericLoc),
3576 DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3577 SubExprs[CONTROLLING] = ControllingExpr;
3578 assert(AssocTypes.size() == AssocExprs.size());
3579 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3580 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3583 //===----------------------------------------------------------------------===//
3584 // DesignatedInitExpr
3585 //===----------------------------------------------------------------------===//
3587 IdentifierInfo *DesignatedInitExpr::Designator::getFieldName() const {
3588 assert(Kind == FieldDesignator && "Only valid on a field designator");
3589 if (Field.NameOrField & 0x01)
3590 return reinterpret_cast<IdentifierInfo *>(Field.NameOrField&~0x01);
3592 return getField()->getIdentifier();
3595 DesignatedInitExpr::DesignatedInitExpr(const ASTContext &C, QualType Ty,
3596 llvm::ArrayRef<Designator> Designators,
3597 SourceLocation EqualOrColonLoc,
3599 ArrayRef<Expr*> IndexExprs,
3601 : Expr(DesignatedInitExprClass, Ty,
3602 Init->getValueKind(), Init->getObjectKind(),
3603 Init->isTypeDependent(), Init->isValueDependent(),
3604 Init->isInstantiationDependent(),
3605 Init->containsUnexpandedParameterPack()),
3606 EqualOrColonLoc(EqualOrColonLoc), GNUSyntax(GNUSyntax),
3607 NumDesignators(Designators.size()), NumSubExprs(IndexExprs.size() + 1) {
3608 this->Designators = new (C) Designator[NumDesignators];
3610 // Record the initializer itself.
3611 child_iterator Child = child_begin();
3614 // Copy the designators and their subexpressions, computing
3615 // value-dependence along the way.
3616 unsigned IndexIdx = 0;
3617 for (unsigned I = 0; I != NumDesignators; ++I) {
3618 this->Designators[I] = Designators[I];
3620 if (this->Designators[I].isArrayDesignator()) {
3621 // Compute type- and value-dependence.
3622 Expr *Index = IndexExprs[IndexIdx];
3623 if (Index->isTypeDependent() || Index->isValueDependent())
3624 ExprBits.TypeDependent = ExprBits.ValueDependent = true;
3625 if (Index->isInstantiationDependent())
3626 ExprBits.InstantiationDependent = true;
3627 // Propagate unexpanded parameter packs.
3628 if (Index->containsUnexpandedParameterPack())
3629 ExprBits.ContainsUnexpandedParameterPack = true;
3631 // Copy the index expressions into permanent storage.
3632 *Child++ = IndexExprs[IndexIdx++];
3633 } else if (this->Designators[I].isArrayRangeDesignator()) {
3634 // Compute type- and value-dependence.
3635 Expr *Start = IndexExprs[IndexIdx];
3636 Expr *End = IndexExprs[IndexIdx + 1];
3637 if (Start->isTypeDependent() || Start->isValueDependent() ||
3638 End->isTypeDependent() || End->isValueDependent()) {
3639 ExprBits.TypeDependent = ExprBits.ValueDependent = true;
3640 ExprBits.InstantiationDependent = true;
3641 } else if (Start->isInstantiationDependent() ||
3642 End->isInstantiationDependent()) {
3643 ExprBits.InstantiationDependent = true;
3646 // Propagate unexpanded parameter packs.
3647 if (Start->containsUnexpandedParameterPack() ||
3648 End->containsUnexpandedParameterPack())
3649 ExprBits.ContainsUnexpandedParameterPack = true;
3651 // Copy the start/end expressions into permanent storage.
3652 *Child++ = IndexExprs[IndexIdx++];
3653 *Child++ = IndexExprs[IndexIdx++];
3657 assert(IndexIdx == IndexExprs.size() && "Wrong number of index expressions");
3660 DesignatedInitExpr *
3661 DesignatedInitExpr::Create(const ASTContext &C,
3662 llvm::ArrayRef<Designator> Designators,
3663 ArrayRef<Expr*> IndexExprs,
3664 SourceLocation ColonOrEqualLoc,
3665 bool UsesColonSyntax, Expr *Init) {
3666 void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(IndexExprs.size() + 1),
3667 alignof(DesignatedInitExpr));
3668 return new (Mem) DesignatedInitExpr(C, C.VoidTy, Designators,
3669 ColonOrEqualLoc, UsesColonSyntax,
3673 DesignatedInitExpr *DesignatedInitExpr::CreateEmpty(const ASTContext &C,
3674 unsigned NumIndexExprs) {
3675 void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(NumIndexExprs + 1),
3676 alignof(DesignatedInitExpr));
3677 return new (Mem) DesignatedInitExpr(NumIndexExprs + 1);
3680 void DesignatedInitExpr::setDesignators(const ASTContext &C,
3681 const Designator *Desigs,
3682 unsigned NumDesigs) {
3683 Designators = new (C) Designator[NumDesigs];
3684 NumDesignators = NumDesigs;
3685 for (unsigned I = 0; I != NumDesigs; ++I)
3686 Designators[I] = Desigs[I];
3689 SourceRange DesignatedInitExpr::getDesignatorsSourceRange() const {
3690 DesignatedInitExpr *DIE = const_cast<DesignatedInitExpr*>(this);
3692 return DIE->getDesignator(0)->getSourceRange();
3693 return SourceRange(DIE->getDesignator(0)->getLocStart(),
3694 DIE->getDesignator(size()-1)->getLocEnd());
3697 SourceLocation DesignatedInitExpr::getLocStart() const {
3698 SourceLocation StartLoc;
3699 auto *DIE = const_cast<DesignatedInitExpr *>(this);
3700 Designator &First = *DIE->getDesignator(0);
3701 if (First.isFieldDesignator()) {
3703 StartLoc = SourceLocation::getFromRawEncoding(First.Field.FieldLoc);
3705 StartLoc = SourceLocation::getFromRawEncoding(First.Field.DotLoc);
3708 SourceLocation::getFromRawEncoding(First.ArrayOrRange.LBracketLoc);
3712 SourceLocation DesignatedInitExpr::getLocEnd() const {
3713 return getInit()->getLocEnd();
3716 Expr *DesignatedInitExpr::getArrayIndex(const Designator& D) const {
3717 assert(D.Kind == Designator::ArrayDesignator && "Requires array designator");
3718 return getSubExpr(D.ArrayOrRange.Index + 1);
3721 Expr *DesignatedInitExpr::getArrayRangeStart(const Designator &D) const {
3722 assert(D.Kind == Designator::ArrayRangeDesignator &&
3723 "Requires array range designator");
3724 return getSubExpr(D.ArrayOrRange.Index + 1);
3727 Expr *DesignatedInitExpr::getArrayRangeEnd(const Designator &D) const {
3728 assert(D.Kind == Designator::ArrayRangeDesignator &&
3729 "Requires array range designator");
3730 return getSubExpr(D.ArrayOrRange.Index + 2);
3733 /// \brief Replaces the designator at index @p Idx with the series
3734 /// of designators in [First, Last).
3735 void DesignatedInitExpr::ExpandDesignator(const ASTContext &C, unsigned Idx,
3736 const Designator *First,
3737 const Designator *Last) {
3738 unsigned NumNewDesignators = Last - First;
3739 if (NumNewDesignators == 0) {
3740 std::copy_backward(Designators + Idx + 1,
3741 Designators + NumDesignators,
3743 --NumNewDesignators;
3745 } else if (NumNewDesignators == 1) {
3746 Designators[Idx] = *First;
3750 Designator *NewDesignators
3751 = new (C) Designator[NumDesignators - 1 + NumNewDesignators];
3752 std::copy(Designators, Designators + Idx, NewDesignators);
3753 std::copy(First, Last, NewDesignators + Idx);
3754 std::copy(Designators + Idx + 1, Designators + NumDesignators,
3755 NewDesignators + Idx + NumNewDesignators);
3756 Designators = NewDesignators;
3757 NumDesignators = NumDesignators - 1 + NumNewDesignators;
3760 DesignatedInitUpdateExpr::DesignatedInitUpdateExpr(const ASTContext &C,
3761 SourceLocation lBraceLoc, Expr *baseExpr, SourceLocation rBraceLoc)
3762 : Expr(DesignatedInitUpdateExprClass, baseExpr->getType(), VK_RValue,
3763 OK_Ordinary, false, false, false, false) {
3764 BaseAndUpdaterExprs[0] = baseExpr;
3766 InitListExpr *ILE = new (C) InitListExpr(C, lBraceLoc, None, rBraceLoc);
3767 ILE->setType(baseExpr->getType());
3768 BaseAndUpdaterExprs[1] = ILE;
3771 SourceLocation DesignatedInitUpdateExpr::getLocStart() const {
3772 return getBase()->getLocStart();
3775 SourceLocation DesignatedInitUpdateExpr::getLocEnd() const {
3776 return getBase()->getLocEnd();
3779 ParenListExpr::ParenListExpr(const ASTContext& C, SourceLocation lparenloc,
3780 ArrayRef<Expr*> exprs,
3781 SourceLocation rparenloc)
3782 : Expr(ParenListExprClass, QualType(), VK_RValue, OK_Ordinary,
3783 false, false, false, false),
3784 NumExprs(exprs.size()), LParenLoc(lparenloc), RParenLoc(rparenloc) {
3785 Exprs = new (C) Stmt*[exprs.size()];
3786 for (unsigned i = 0; i != exprs.size(); ++i) {
3787 if (exprs[i]->isTypeDependent())
3788 ExprBits.TypeDependent = true;
3789 if (exprs[i]->isValueDependent())
3790 ExprBits.ValueDependent = true;
3791 if (exprs[i]->isInstantiationDependent())
3792 ExprBits.InstantiationDependent = true;
3793 if (exprs[i]->containsUnexpandedParameterPack())
3794 ExprBits.ContainsUnexpandedParameterPack = true;
3796 Exprs[i] = exprs[i];
3800 const OpaqueValueExpr *OpaqueValueExpr::findInCopyConstruct(const Expr *e) {
3801 if (const ExprWithCleanups *ewc = dyn_cast<ExprWithCleanups>(e))
3802 e = ewc->getSubExpr();
3803 if (const MaterializeTemporaryExpr *m = dyn_cast<MaterializeTemporaryExpr>(e))
3804 e = m->GetTemporaryExpr();
3805 e = cast<CXXConstructExpr>(e)->getArg(0);
3806 while (const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(e))
3807 e = ice->getSubExpr();
3808 return cast<OpaqueValueExpr>(e);
3811 PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &Context,
3813 unsigned numSemanticExprs) {
3815 Context.Allocate(totalSizeToAlloc<Expr *>(1 + numSemanticExprs),
3816 alignof(PseudoObjectExpr));
3817 return new(buffer) PseudoObjectExpr(sh, numSemanticExprs);
3820 PseudoObjectExpr::PseudoObjectExpr(EmptyShell shell, unsigned numSemanticExprs)
3821 : Expr(PseudoObjectExprClass, shell) {
3822 PseudoObjectExprBits.NumSubExprs = numSemanticExprs + 1;
3825 PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &C, Expr *syntax,
3826 ArrayRef<Expr*> semantics,
3827 unsigned resultIndex) {
3828 assert(syntax && "no syntactic expression!");
3829 assert(semantics.size() && "no semantic expressions!");
3833 if (resultIndex == NoResult) {
3837 assert(resultIndex < semantics.size());
3838 type = semantics[resultIndex]->getType();
3839 VK = semantics[resultIndex]->getValueKind();
3840 assert(semantics[resultIndex]->getObjectKind() == OK_Ordinary);
3843 void *buffer = C.Allocate(totalSizeToAlloc<Expr *>(semantics.size() + 1),
3844 alignof(PseudoObjectExpr));
3845 return new(buffer) PseudoObjectExpr(type, VK, syntax, semantics,
3849 PseudoObjectExpr::PseudoObjectExpr(QualType type, ExprValueKind VK,
3850 Expr *syntax, ArrayRef<Expr*> semantics,
3851 unsigned resultIndex)
3852 : Expr(PseudoObjectExprClass, type, VK, OK_Ordinary,
3853 /*filled in at end of ctor*/ false, false, false, false) {
3854 PseudoObjectExprBits.NumSubExprs = semantics.size() + 1;
3855 PseudoObjectExprBits.ResultIndex = resultIndex + 1;
3857 for (unsigned i = 0, e = semantics.size() + 1; i != e; ++i) {
3858 Expr *E = (i == 0 ? syntax : semantics[i-1]);
3859 getSubExprsBuffer()[i] = E;
3861 if (E->isTypeDependent())
3862 ExprBits.TypeDependent = true;
3863 if (E->isValueDependent())
3864 ExprBits.ValueDependent = true;
3865 if (E->isInstantiationDependent())
3866 ExprBits.InstantiationDependent = true;
3867 if (E->containsUnexpandedParameterPack())
3868 ExprBits.ContainsUnexpandedParameterPack = true;
3870 if (isa<OpaqueValueExpr>(E))
3871 assert(cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr &&
3872 "opaque-value semantic expressions for pseudo-object "
3873 "operations must have sources");
3877 //===----------------------------------------------------------------------===//
3878 // Child Iterators for iterating over subexpressions/substatements
3879 //===----------------------------------------------------------------------===//
3881 // UnaryExprOrTypeTraitExpr
3882 Stmt::child_range UnaryExprOrTypeTraitExpr::children() {
3883 // If this is of a type and the type is a VLA type (and not a typedef), the
3884 // size expression of the VLA needs to be treated as an executable expression.
3885 // Why isn't this weirdness documented better in StmtIterator?
3886 if (isArgumentType()) {
3887 if (const VariableArrayType* T = dyn_cast<VariableArrayType>(
3888 getArgumentType().getTypePtr()))
3889 return child_range(child_iterator(T), child_iterator());
3890 return child_range(child_iterator(), child_iterator());
3892 return child_range(&Argument.Ex, &Argument.Ex + 1);
3895 AtomicExpr::AtomicExpr(SourceLocation BLoc, ArrayRef<Expr*> args,
3896 QualType t, AtomicOp op, SourceLocation RP)
3897 : Expr(AtomicExprClass, t, VK_RValue, OK_Ordinary,
3898 false, false, false, false),
3899 NumSubExprs(args.size()), BuiltinLoc(BLoc), RParenLoc(RP), Op(op)
3901 assert(args.size() == getNumSubExprs(op) && "wrong number of subexpressions");
3902 for (unsigned i = 0; i != args.size(); i++) {
3903 if (args[i]->isTypeDependent())
3904 ExprBits.TypeDependent = true;
3905 if (args[i]->isValueDependent())
3906 ExprBits.ValueDependent = true;
3907 if (args[i]->isInstantiationDependent())
3908 ExprBits.InstantiationDependent = true;
3909 if (args[i]->containsUnexpandedParameterPack())
3910 ExprBits.ContainsUnexpandedParameterPack = true;
3912 SubExprs[i] = args[i];
3916 unsigned AtomicExpr::getNumSubExprs(AtomicOp Op) {
3918 case AO__c11_atomic_init:
3919 case AO__c11_atomic_load:
3920 case AO__atomic_load_n:
3923 case AO__c11_atomic_store:
3924 case AO__c11_atomic_exchange:
3925 case AO__atomic_load:
3926 case AO__atomic_store:
3927 case AO__atomic_store_n:
3928 case AO__atomic_exchange_n:
3929 case AO__c11_atomic_fetch_add:
3930 case AO__c11_atomic_fetch_sub:
3931 case AO__c11_atomic_fetch_and:
3932 case AO__c11_atomic_fetch_or:
3933 case AO__c11_atomic_fetch_xor:
3934 case AO__atomic_fetch_add:
3935 case AO__atomic_fetch_sub:
3936 case AO__atomic_fetch_and:
3937 case AO__atomic_fetch_or:
3938 case AO__atomic_fetch_xor:
3939 case AO__atomic_fetch_nand:
3940 case AO__atomic_add_fetch:
3941 case AO__atomic_sub_fetch:
3942 case AO__atomic_and_fetch:
3943 case AO__atomic_or_fetch:
3944 case AO__atomic_xor_fetch:
3945 case AO__atomic_nand_fetch:
3948 case AO__atomic_exchange:
3951 case AO__c11_atomic_compare_exchange_strong:
3952 case AO__c11_atomic_compare_exchange_weak:
3955 case AO__atomic_compare_exchange:
3956 case AO__atomic_compare_exchange_n:
3959 llvm_unreachable("unknown atomic op");
3962 QualType OMPArraySectionExpr::getBaseOriginalType(const Expr *Base) {
3963 unsigned ArraySectionCount = 0;
3964 while (auto *OASE = dyn_cast<OMPArraySectionExpr>(Base->IgnoreParens())) {
3965 Base = OASE->getBase();
3966 ++ArraySectionCount;
3969 dyn_cast<ArraySubscriptExpr>(Base->IgnoreParenImpCasts())) {
3970 Base = ASE->getBase();
3971 ++ArraySectionCount;
3973 Base = Base->IgnoreParenImpCasts();
3974 auto OriginalTy = Base->getType();
3975 if (auto *DRE = dyn_cast<DeclRefExpr>(Base))
3976 if (auto *PVD = dyn_cast<ParmVarDecl>(DRE->getDecl()))
3977 OriginalTy = PVD->getOriginalType().getNonReferenceType();
3979 for (unsigned Cnt = 0; Cnt < ArraySectionCount; ++Cnt) {
3980 if (OriginalTy->isAnyPointerType())
3981 OriginalTy = OriginalTy->getPointeeType();
3983 assert (OriginalTy->isArrayType());
3984 OriginalTy = OriginalTy->castAsArrayTypeUnsafe()->getElementType();