1 //===--- Expr.cpp - Expression AST Node Implementation --------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the Expr class and subclasses.
12 //===----------------------------------------------------------------------===//
14 #include "clang/AST/APValue.h"
15 #include "clang/AST/ASTContext.h"
16 #include "clang/AST/Attr.h"
17 #include "clang/AST/DeclCXX.h"
18 #include "clang/AST/DeclObjC.h"
19 #include "clang/AST/DeclTemplate.h"
20 #include "clang/AST/EvaluatedExprVisitor.h"
21 #include "clang/AST/Expr.h"
22 #include "clang/AST/ExprCXX.h"
23 #include "clang/AST/Mangle.h"
24 #include "clang/AST/RecordLayout.h"
25 #include "clang/AST/StmtVisitor.h"
26 #include "clang/Basic/Builtins.h"
27 #include "clang/Basic/CharInfo.h"
28 #include "clang/Basic/SourceManager.h"
29 #include "clang/Basic/TargetInfo.h"
30 #include "clang/Lex/Lexer.h"
31 #include "clang/Lex/LiteralSupport.h"
32 #include "clang/Sema/SemaDiagnostic.h"
33 #include "llvm/Support/ErrorHandling.h"
34 #include "llvm/Support/raw_ostream.h"
37 using namespace clang;
39 const CXXRecordDecl *Expr::getBestDynamicClassType() const {
40 const Expr *E = ignoreParenBaseCasts();
42 QualType DerivedType = E->getType();
43 if (const PointerType *PTy = DerivedType->getAs<PointerType>())
44 DerivedType = PTy->getPointeeType();
46 if (DerivedType->isDependentType())
49 const RecordType *Ty = DerivedType->castAs<RecordType>();
50 Decl *D = Ty->getDecl();
51 return cast<CXXRecordDecl>(D);
54 const Expr *Expr::skipRValueSubobjectAdjustments(
55 SmallVectorImpl<const Expr *> &CommaLHSs,
56 SmallVectorImpl<SubobjectAdjustment> &Adjustments) const {
59 E = E->IgnoreParens();
61 if (const CastExpr *CE = dyn_cast<CastExpr>(E)) {
62 if ((CE->getCastKind() == CK_DerivedToBase ||
63 CE->getCastKind() == CK_UncheckedDerivedToBase) &&
64 E->getType()->isRecordType()) {
66 CXXRecordDecl *Derived
67 = cast<CXXRecordDecl>(E->getType()->getAs<RecordType>()->getDecl());
68 Adjustments.push_back(SubobjectAdjustment(CE, Derived));
72 if (CE->getCastKind() == CK_NoOp) {
76 } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) {
78 assert(ME->getBase()->getType()->isRecordType());
79 if (FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl())) {
80 if (!Field->isBitField() && !Field->getType()->isReferenceType()) {
82 Adjustments.push_back(SubobjectAdjustment(Field));
87 } else if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
88 if (BO->isPtrMemOp()) {
89 assert(BO->getRHS()->isRValue());
91 const MemberPointerType *MPT =
92 BO->getRHS()->getType()->getAs<MemberPointerType>();
93 Adjustments.push_back(SubobjectAdjustment(MPT, BO->getRHS()));
95 } else if (BO->getOpcode() == BO_Comma) {
96 CommaLHSs.push_back(BO->getLHS());
108 /// isKnownToHaveBooleanValue - Return true if this is an integer expression
109 /// that is known to return 0 or 1. This happens for _Bool/bool expressions
110 /// but also int expressions which are produced by things like comparisons in
112 bool Expr::isKnownToHaveBooleanValue() const {
113 const Expr *E = IgnoreParens();
115 // If this value has _Bool type, it is obvious 0/1.
116 if (E->getType()->isBooleanType()) return true;
117 // If this is a non-scalar-integer type, we don't care enough to try.
118 if (!E->getType()->isIntegralOrEnumerationType()) return false;
120 if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
121 switch (UO->getOpcode()) {
123 return UO->getSubExpr()->isKnownToHaveBooleanValue();
131 // Only look through implicit casts. If the user writes
132 // '(int) (a && b)' treat it as an arbitrary int.
133 if (const ImplicitCastExpr *CE = dyn_cast<ImplicitCastExpr>(E))
134 return CE->getSubExpr()->isKnownToHaveBooleanValue();
136 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
137 switch (BO->getOpcode()) {
138 default: return false;
139 case BO_LT: // Relational operators.
143 case BO_EQ: // Equality operators.
145 case BO_LAnd: // AND operator.
146 case BO_LOr: // Logical OR operator.
149 case BO_And: // Bitwise AND operator.
150 case BO_Xor: // Bitwise XOR operator.
151 case BO_Or: // Bitwise OR operator.
152 // Handle things like (x==2)|(y==12).
153 return BO->getLHS()->isKnownToHaveBooleanValue() &&
154 BO->getRHS()->isKnownToHaveBooleanValue();
158 return BO->getRHS()->isKnownToHaveBooleanValue();
162 if (const ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E))
163 return CO->getTrueExpr()->isKnownToHaveBooleanValue() &&
164 CO->getFalseExpr()->isKnownToHaveBooleanValue();
169 // Amusing macro metaprogramming hack: check whether a class provides
170 // a more specific implementation of getExprLoc().
172 // See also Stmt.cpp:{getLocStart(),getLocEnd()}.
174 /// This implementation is used when a class provides a custom
175 /// implementation of getExprLoc.
176 template <class E, class T>
177 SourceLocation getExprLocImpl(const Expr *expr,
178 SourceLocation (T::*v)() const) {
179 return static_cast<const E*>(expr)->getExprLoc();
182 /// This implementation is used when a class doesn't provide
183 /// a custom implementation of getExprLoc. Overload resolution
184 /// should pick it over the implementation above because it's
185 /// more specialized according to function template partial ordering.
187 SourceLocation getExprLocImpl(const Expr *expr,
188 SourceLocation (Expr::*v)() const) {
189 return static_cast<const E*>(expr)->getLocStart();
193 SourceLocation Expr::getExprLoc() const {
194 switch (getStmtClass()) {
195 case Stmt::NoStmtClass: llvm_unreachable("statement without class");
196 #define ABSTRACT_STMT(type)
197 #define STMT(type, base) \
198 case Stmt::type##Class: break;
199 #define EXPR(type, base) \
200 case Stmt::type##Class: return getExprLocImpl<type>(this, &type::getExprLoc);
201 #include "clang/AST/StmtNodes.inc"
203 llvm_unreachable("unknown expression kind");
206 //===----------------------------------------------------------------------===//
207 // Primary Expressions.
208 //===----------------------------------------------------------------------===//
210 /// \brief Compute the type-, value-, and instantiation-dependence of a
211 /// declaration reference
212 /// based on the declaration being referenced.
213 static void computeDeclRefDependence(const ASTContext &Ctx, NamedDecl *D,
214 QualType T, bool &TypeDependent,
215 bool &ValueDependent,
216 bool &InstantiationDependent) {
217 TypeDependent = false;
218 ValueDependent = false;
219 InstantiationDependent = false;
221 // (TD) C++ [temp.dep.expr]p3:
222 // An id-expression is type-dependent if it contains:
226 // (VD) C++ [temp.dep.constexpr]p2:
227 // An identifier is value-dependent if it is:
229 // (TD) - an identifier that was declared with dependent type
230 // (VD) - a name declared with a dependent type,
231 if (T->isDependentType()) {
232 TypeDependent = true;
233 ValueDependent = true;
234 InstantiationDependent = true;
236 } else if (T->isInstantiationDependentType()) {
237 InstantiationDependent = true;
240 // (TD) - a conversion-function-id that specifies a dependent type
241 if (D->getDeclName().getNameKind()
242 == DeclarationName::CXXConversionFunctionName) {
243 QualType T = D->getDeclName().getCXXNameType();
244 if (T->isDependentType()) {
245 TypeDependent = true;
246 ValueDependent = true;
247 InstantiationDependent = true;
251 if (T->isInstantiationDependentType())
252 InstantiationDependent = true;
255 // (VD) - the name of a non-type template parameter,
256 if (isa<NonTypeTemplateParmDecl>(D)) {
257 ValueDependent = true;
258 InstantiationDependent = true;
262 // (VD) - a constant with integral or enumeration type and is
263 // initialized with an expression that is value-dependent.
264 // (VD) - a constant with literal type and is initialized with an
265 // expression that is value-dependent [C++11].
266 // (VD) - FIXME: Missing from the standard:
267 // - an entity with reference type and is initialized with an
268 // expression that is value-dependent [C++11]
269 if (VarDecl *Var = dyn_cast<VarDecl>(D)) {
270 if ((Ctx.getLangOpts().CPlusPlus11 ?
271 Var->getType()->isLiteralType(Ctx) :
272 Var->getType()->isIntegralOrEnumerationType()) &&
273 (Var->getType().isConstQualified() ||
274 Var->getType()->isReferenceType())) {
275 if (const Expr *Init = Var->getAnyInitializer())
276 if (Init->isValueDependent()) {
277 ValueDependent = true;
278 InstantiationDependent = true;
282 // (VD) - FIXME: Missing from the standard:
283 // - a member function or a static data member of the current
285 if (Var->isStaticDataMember() &&
286 Var->getDeclContext()->isDependentContext()) {
287 ValueDependent = true;
288 InstantiationDependent = true;
289 TypeSourceInfo *TInfo = Var->getFirstDecl()->getTypeSourceInfo();
290 if (TInfo->getType()->isIncompleteArrayType())
291 TypeDependent = true;
297 // (VD) - FIXME: Missing from the standard:
298 // - a member function or a static data member of the current
300 if (isa<CXXMethodDecl>(D) && D->getDeclContext()->isDependentContext()) {
301 ValueDependent = true;
302 InstantiationDependent = true;
306 void DeclRefExpr::computeDependence(const ASTContext &Ctx) {
307 bool TypeDependent = false;
308 bool ValueDependent = false;
309 bool InstantiationDependent = false;
310 computeDeclRefDependence(Ctx, getDecl(), getType(), TypeDependent,
311 ValueDependent, InstantiationDependent);
313 ExprBits.TypeDependent |= TypeDependent;
314 ExprBits.ValueDependent |= ValueDependent;
315 ExprBits.InstantiationDependent |= InstantiationDependent;
317 // Is the declaration a parameter pack?
318 if (getDecl()->isParameterPack())
319 ExprBits.ContainsUnexpandedParameterPack = true;
322 DeclRefExpr::DeclRefExpr(const ASTContext &Ctx,
323 NestedNameSpecifierLoc QualifierLoc,
324 SourceLocation TemplateKWLoc,
325 ValueDecl *D, bool RefersToEnclosingVariableOrCapture,
326 const DeclarationNameInfo &NameInfo,
328 const TemplateArgumentListInfo *TemplateArgs,
329 QualType T, ExprValueKind VK)
330 : Expr(DeclRefExprClass, T, VK, OK_Ordinary, false, false, false, false),
331 D(D), Loc(NameInfo.getLoc()), DNLoc(NameInfo.getInfo()) {
332 DeclRefExprBits.HasQualifier = QualifierLoc ? 1 : 0;
334 new (getTrailingObjects<NestedNameSpecifierLoc>())
335 NestedNameSpecifierLoc(QualifierLoc);
336 auto *NNS = QualifierLoc.getNestedNameSpecifier();
337 if (NNS->isInstantiationDependent())
338 ExprBits.InstantiationDependent = true;
339 if (NNS->containsUnexpandedParameterPack())
340 ExprBits.ContainsUnexpandedParameterPack = true;
342 DeclRefExprBits.HasFoundDecl = FoundD ? 1 : 0;
344 *getTrailingObjects<NamedDecl *>() = FoundD;
345 DeclRefExprBits.HasTemplateKWAndArgsInfo
346 = (TemplateArgs || TemplateKWLoc.isValid()) ? 1 : 0;
347 DeclRefExprBits.RefersToEnclosingVariableOrCapture =
348 RefersToEnclosingVariableOrCapture;
350 bool Dependent = false;
351 bool InstantiationDependent = false;
352 bool ContainsUnexpandedParameterPack = false;
353 getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
354 TemplateKWLoc, *TemplateArgs, getTrailingObjects<TemplateArgumentLoc>(),
355 Dependent, InstantiationDependent, ContainsUnexpandedParameterPack);
356 assert(!Dependent && "built a DeclRefExpr with dependent template args");
357 ExprBits.InstantiationDependent |= InstantiationDependent;
358 ExprBits.ContainsUnexpandedParameterPack |= ContainsUnexpandedParameterPack;
359 } else if (TemplateKWLoc.isValid()) {
360 getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
363 DeclRefExprBits.HadMultipleCandidates = 0;
365 computeDependence(Ctx);
368 DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
369 NestedNameSpecifierLoc QualifierLoc,
370 SourceLocation TemplateKWLoc,
372 bool RefersToEnclosingVariableOrCapture,
373 SourceLocation NameLoc,
377 const TemplateArgumentListInfo *TemplateArgs) {
378 return Create(Context, QualifierLoc, TemplateKWLoc, D,
379 RefersToEnclosingVariableOrCapture,
380 DeclarationNameInfo(D->getDeclName(), NameLoc),
381 T, VK, FoundD, TemplateArgs);
384 DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
385 NestedNameSpecifierLoc QualifierLoc,
386 SourceLocation TemplateKWLoc,
388 bool RefersToEnclosingVariableOrCapture,
389 const DeclarationNameInfo &NameInfo,
393 const TemplateArgumentListInfo *TemplateArgs) {
394 // Filter out cases where the found Decl is the same as the value refenenced.
398 bool HasTemplateKWAndArgsInfo = TemplateArgs || TemplateKWLoc.isValid();
400 totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *,
401 ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>(
402 QualifierLoc ? 1 : 0, FoundD ? 1 : 0,
403 HasTemplateKWAndArgsInfo ? 1 : 0,
404 TemplateArgs ? TemplateArgs->size() : 0);
406 void *Mem = Context.Allocate(Size, llvm::alignOf<DeclRefExpr>());
407 return new (Mem) DeclRefExpr(Context, QualifierLoc, TemplateKWLoc, D,
408 RefersToEnclosingVariableOrCapture,
409 NameInfo, FoundD, TemplateArgs, T, VK);
412 DeclRefExpr *DeclRefExpr::CreateEmpty(const ASTContext &Context,
415 bool HasTemplateKWAndArgsInfo,
416 unsigned NumTemplateArgs) {
417 assert(NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo);
419 totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *,
420 ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>(
421 HasQualifier ? 1 : 0, HasFoundDecl ? 1 : 0, HasTemplateKWAndArgsInfo,
423 void *Mem = Context.Allocate(Size, llvm::alignOf<DeclRefExpr>());
424 return new (Mem) DeclRefExpr(EmptyShell());
427 SourceLocation DeclRefExpr::getLocStart() const {
429 return getQualifierLoc().getBeginLoc();
430 return getNameInfo().getLocStart();
432 SourceLocation DeclRefExpr::getLocEnd() const {
433 if (hasExplicitTemplateArgs())
434 return getRAngleLoc();
435 return getNameInfo().getLocEnd();
438 PredefinedExpr::PredefinedExpr(SourceLocation L, QualType FNTy, IdentType IT,
440 : Expr(PredefinedExprClass, FNTy, VK_LValue, OK_Ordinary,
441 FNTy->isDependentType(), FNTy->isDependentType(),
442 FNTy->isInstantiationDependentType(),
443 /*ContainsUnexpandedParameterPack=*/false),
444 Loc(L), Type(IT), FnName(SL) {}
446 StringLiteral *PredefinedExpr::getFunctionName() {
447 return cast_or_null<StringLiteral>(FnName);
450 StringRef PredefinedExpr::getIdentTypeName(PredefinedExpr::IdentType IT) {
455 return "__FUNCTION__";
457 return "__FUNCDNAME__";
459 return "L__FUNCTION__";
461 return "__PRETTY_FUNCTION__";
463 return "__FUNCSIG__";
464 case PrettyFunctionNoVirtual:
467 llvm_unreachable("Unknown ident type for PredefinedExpr");
470 // FIXME: Maybe this should use DeclPrinter with a special "print predefined
471 // expr" policy instead.
472 std::string PredefinedExpr::ComputeName(IdentType IT, const Decl *CurrentDecl) {
473 ASTContext &Context = CurrentDecl->getASTContext();
475 if (IT == PredefinedExpr::FuncDName) {
476 if (const NamedDecl *ND = dyn_cast<NamedDecl>(CurrentDecl)) {
477 std::unique_ptr<MangleContext> MC;
478 MC.reset(Context.createMangleContext());
480 if (MC->shouldMangleDeclName(ND)) {
481 SmallString<256> Buffer;
482 llvm::raw_svector_ostream Out(Buffer);
483 if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(ND))
484 MC->mangleCXXCtor(CD, Ctor_Base, Out);
485 else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(ND))
486 MC->mangleCXXDtor(DD, Dtor_Base, Out);
488 MC->mangleName(ND, Out);
490 if (!Buffer.empty() && Buffer.front() == '\01')
491 return Buffer.substr(1);
494 return ND->getIdentifier()->getName();
498 if (auto *BD = dyn_cast<BlockDecl>(CurrentDecl)) {
499 std::unique_ptr<MangleContext> MC;
500 MC.reset(Context.createMangleContext());
501 SmallString<256> Buffer;
502 llvm::raw_svector_ostream Out(Buffer);
503 auto DC = CurrentDecl->getDeclContext();
504 if (DC->isFileContext())
505 MC->mangleGlobalBlock(BD, /*ID*/ nullptr, Out);
506 else if (const auto *CD = dyn_cast<CXXConstructorDecl>(DC))
507 MC->mangleCtorBlock(CD, /*CT*/ Ctor_Complete, BD, Out);
508 else if (const auto *DD = dyn_cast<CXXDestructorDecl>(DC))
509 MC->mangleDtorBlock(DD, /*DT*/ Dtor_Complete, BD, Out);
511 MC->mangleBlock(DC, BD, Out);
514 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(CurrentDecl)) {
515 if (IT != PrettyFunction && IT != PrettyFunctionNoVirtual && IT != FuncSig)
516 return FD->getNameAsString();
518 SmallString<256> Name;
519 llvm::raw_svector_ostream Out(Name);
521 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
522 if (MD->isVirtual() && IT != PrettyFunctionNoVirtual)
528 PrintingPolicy Policy(Context.getLangOpts());
530 llvm::raw_string_ostream POut(Proto);
532 const FunctionDecl *Decl = FD;
533 if (const FunctionDecl* Pattern = FD->getTemplateInstantiationPattern())
535 const FunctionType *AFT = Decl->getType()->getAs<FunctionType>();
536 const FunctionProtoType *FT = nullptr;
537 if (FD->hasWrittenPrototype())
538 FT = dyn_cast<FunctionProtoType>(AFT);
541 switch (FT->getCallConv()) {
542 case CC_C: POut << "__cdecl "; break;
543 case CC_X86StdCall: POut << "__stdcall "; break;
544 case CC_X86FastCall: POut << "__fastcall "; break;
545 case CC_X86ThisCall: POut << "__thiscall "; break;
546 case CC_X86VectorCall: POut << "__vectorcall "; break;
547 // Only bother printing the conventions that MSVC knows about.
552 FD->printQualifiedName(POut, Policy);
556 for (unsigned i = 0, e = Decl->getNumParams(); i != e; ++i) {
558 POut << Decl->getParamDecl(i)->getType().stream(Policy);
561 if (FT->isVariadic()) {
562 if (FD->getNumParams()) POut << ", ";
568 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
569 const FunctionType *FT = MD->getType()->castAs<FunctionType>();
572 if (FT->isVolatile())
574 RefQualifierKind Ref = MD->getRefQualifier();
575 if (Ref == RQ_LValue)
577 else if (Ref == RQ_RValue)
581 typedef SmallVector<const ClassTemplateSpecializationDecl *, 8> SpecsTy;
583 const DeclContext *Ctx = FD->getDeclContext();
584 while (Ctx && isa<NamedDecl>(Ctx)) {
585 const ClassTemplateSpecializationDecl *Spec
586 = dyn_cast<ClassTemplateSpecializationDecl>(Ctx);
587 if (Spec && !Spec->isExplicitSpecialization())
588 Specs.push_back(Spec);
589 Ctx = Ctx->getParent();
592 std::string TemplateParams;
593 llvm::raw_string_ostream TOut(TemplateParams);
594 for (SpecsTy::reverse_iterator I = Specs.rbegin(), E = Specs.rend();
596 const TemplateParameterList *Params
597 = (*I)->getSpecializedTemplate()->getTemplateParameters();
598 const TemplateArgumentList &Args = (*I)->getTemplateArgs();
599 assert(Params->size() == Args.size());
600 for (unsigned i = 0, numParams = Params->size(); i != numParams; ++i) {
601 StringRef Param = Params->getParam(i)->getName();
602 if (Param.empty()) continue;
603 TOut << Param << " = ";
604 Args.get(i).print(Policy, TOut);
609 FunctionTemplateSpecializationInfo *FSI
610 = FD->getTemplateSpecializationInfo();
611 if (FSI && !FSI->isExplicitSpecialization()) {
612 const TemplateParameterList* Params
613 = FSI->getTemplate()->getTemplateParameters();
614 const TemplateArgumentList* Args = FSI->TemplateArguments;
615 assert(Params->size() == Args->size());
616 for (unsigned i = 0, e = Params->size(); i != e; ++i) {
617 StringRef Param = Params->getParam(i)->getName();
618 if (Param.empty()) continue;
619 TOut << Param << " = ";
620 Args->get(i).print(Policy, TOut);
626 if (!TemplateParams.empty()) {
627 // remove the trailing comma and space
628 TemplateParams.resize(TemplateParams.size() - 2);
629 POut << " [" << TemplateParams << "]";
634 // Print "auto" for all deduced return types. This includes C++1y return
635 // type deduction and lambdas. For trailing return types resolve the
636 // decltype expression. Otherwise print the real type when this is
637 // not a constructor or destructor.
638 if (isa<CXXMethodDecl>(FD) &&
639 cast<CXXMethodDecl>(FD)->getParent()->isLambda())
640 Proto = "auto " + Proto;
641 else if (FT && FT->getReturnType()->getAs<DecltypeType>())
643 ->getAs<DecltypeType>()
644 ->getUnderlyingType()
645 .getAsStringInternal(Proto, Policy);
646 else if (!isa<CXXConstructorDecl>(FD) && !isa<CXXDestructorDecl>(FD))
647 AFT->getReturnType().getAsStringInternal(Proto, Policy);
651 return Name.str().str();
653 if (const CapturedDecl *CD = dyn_cast<CapturedDecl>(CurrentDecl)) {
654 for (const DeclContext *DC = CD->getParent(); DC; DC = DC->getParent())
655 // Skip to its enclosing function or method, but not its enclosing
657 if (DC->isFunctionOrMethod() && (DC->getDeclKind() != Decl::Captured)) {
658 const Decl *D = Decl::castFromDeclContext(DC);
659 return ComputeName(IT, D);
661 llvm_unreachable("CapturedDecl not inside a function or method");
663 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(CurrentDecl)) {
664 SmallString<256> Name;
665 llvm::raw_svector_ostream Out(Name);
666 Out << (MD->isInstanceMethod() ? '-' : '+');
669 // For incorrect code, there might not be an ObjCInterfaceDecl. Do
670 // a null check to avoid a crash.
671 if (const ObjCInterfaceDecl *ID = MD->getClassInterface())
674 if (const ObjCCategoryImplDecl *CID =
675 dyn_cast<ObjCCategoryImplDecl>(MD->getDeclContext()))
676 Out << '(' << *CID << ')';
679 MD->getSelector().print(Out);
682 return Name.str().str();
684 if (isa<TranslationUnitDecl>(CurrentDecl) && IT == PrettyFunction) {
685 // __PRETTY_FUNCTION__ -> "top level", the others produce an empty string.
691 void APNumericStorage::setIntValue(const ASTContext &C,
692 const llvm::APInt &Val) {
696 BitWidth = Val.getBitWidth();
697 unsigned NumWords = Val.getNumWords();
698 const uint64_t* Words = Val.getRawData();
700 pVal = new (C) uint64_t[NumWords];
701 std::copy(Words, Words + NumWords, pVal);
702 } else if (NumWords == 1)
708 IntegerLiteral::IntegerLiteral(const ASTContext &C, const llvm::APInt &V,
709 QualType type, SourceLocation l)
710 : Expr(IntegerLiteralClass, type, VK_RValue, OK_Ordinary, false, false,
713 assert(type->isIntegerType() && "Illegal type in IntegerLiteral");
714 assert(V.getBitWidth() == C.getIntWidth(type) &&
715 "Integer type is not the correct size for constant.");
720 IntegerLiteral::Create(const ASTContext &C, const llvm::APInt &V,
721 QualType type, SourceLocation l) {
722 return new (C) IntegerLiteral(C, V, type, l);
726 IntegerLiteral::Create(const ASTContext &C, EmptyShell Empty) {
727 return new (C) IntegerLiteral(Empty);
730 FloatingLiteral::FloatingLiteral(const ASTContext &C, const llvm::APFloat &V,
731 bool isexact, QualType Type, SourceLocation L)
732 : Expr(FloatingLiteralClass, Type, VK_RValue, OK_Ordinary, false, false,
733 false, false), Loc(L) {
734 setSemantics(V.getSemantics());
735 FloatingLiteralBits.IsExact = isexact;
739 FloatingLiteral::FloatingLiteral(const ASTContext &C, EmptyShell Empty)
740 : Expr(FloatingLiteralClass, Empty) {
741 setRawSemantics(IEEEhalf);
742 FloatingLiteralBits.IsExact = false;
746 FloatingLiteral::Create(const ASTContext &C, const llvm::APFloat &V,
747 bool isexact, QualType Type, SourceLocation L) {
748 return new (C) FloatingLiteral(C, V, isexact, Type, L);
752 FloatingLiteral::Create(const ASTContext &C, EmptyShell Empty) {
753 return new (C) FloatingLiteral(C, Empty);
756 const llvm::fltSemantics &FloatingLiteral::getSemantics() const {
757 switch(FloatingLiteralBits.Semantics) {
759 return llvm::APFloat::IEEEhalf;
761 return llvm::APFloat::IEEEsingle;
763 return llvm::APFloat::IEEEdouble;
764 case x87DoubleExtended:
765 return llvm::APFloat::x87DoubleExtended;
767 return llvm::APFloat::IEEEquad;
768 case PPCDoubleDouble:
769 return llvm::APFloat::PPCDoubleDouble;
771 llvm_unreachable("Unrecognised floating semantics");
774 void FloatingLiteral::setSemantics(const llvm::fltSemantics &Sem) {
775 if (&Sem == &llvm::APFloat::IEEEhalf)
776 FloatingLiteralBits.Semantics = IEEEhalf;
777 else if (&Sem == &llvm::APFloat::IEEEsingle)
778 FloatingLiteralBits.Semantics = IEEEsingle;
779 else if (&Sem == &llvm::APFloat::IEEEdouble)
780 FloatingLiteralBits.Semantics = IEEEdouble;
781 else if (&Sem == &llvm::APFloat::x87DoubleExtended)
782 FloatingLiteralBits.Semantics = x87DoubleExtended;
783 else if (&Sem == &llvm::APFloat::IEEEquad)
784 FloatingLiteralBits.Semantics = IEEEquad;
785 else if (&Sem == &llvm::APFloat::PPCDoubleDouble)
786 FloatingLiteralBits.Semantics = PPCDoubleDouble;
788 llvm_unreachable("Unknown floating semantics");
791 /// getValueAsApproximateDouble - This returns the value as an inaccurate
792 /// double. Note that this may cause loss of precision, but is useful for
793 /// debugging dumps, etc.
794 double FloatingLiteral::getValueAsApproximateDouble() const {
795 llvm::APFloat V = getValue();
797 V.convert(llvm::APFloat::IEEEdouble, llvm::APFloat::rmNearestTiesToEven,
799 return V.convertToDouble();
802 int StringLiteral::mapCharByteWidth(TargetInfo const &target,StringKind k) {
803 int CharByteWidth = 0;
807 CharByteWidth = target.getCharWidth();
810 CharByteWidth = target.getWCharWidth();
813 CharByteWidth = target.getChar16Width();
816 CharByteWidth = target.getChar32Width();
819 assert((CharByteWidth & 7) == 0 && "Assumes character size is byte multiple");
821 assert((CharByteWidth==1 || CharByteWidth==2 || CharByteWidth==4)
822 && "character byte widths supported are 1, 2, and 4 only");
823 return CharByteWidth;
826 StringLiteral *StringLiteral::Create(const ASTContext &C, StringRef Str,
827 StringKind Kind, bool Pascal, QualType Ty,
828 const SourceLocation *Loc,
830 assert(C.getAsConstantArrayType(Ty) &&
831 "StringLiteral must be of constant array type!");
833 // Allocate enough space for the StringLiteral plus an array of locations for
834 // any concatenated string tokens.
835 void *Mem = C.Allocate(sizeof(StringLiteral)+
836 sizeof(SourceLocation)*(NumStrs-1),
837 llvm::alignOf<StringLiteral>());
838 StringLiteral *SL = new (Mem) StringLiteral(Ty);
840 // OPTIMIZE: could allocate this appended to the StringLiteral.
841 SL->setString(C,Str,Kind,Pascal);
843 SL->TokLocs[0] = Loc[0];
844 SL->NumConcatenated = NumStrs;
847 memcpy(&SL->TokLocs[1], Loc+1, sizeof(SourceLocation)*(NumStrs-1));
851 StringLiteral *StringLiteral::CreateEmpty(const ASTContext &C,
853 void *Mem = C.Allocate(sizeof(StringLiteral)+
854 sizeof(SourceLocation)*(NumStrs-1),
855 llvm::alignOf<StringLiteral>());
856 StringLiteral *SL = new (Mem) StringLiteral(QualType());
857 SL->CharByteWidth = 0;
859 SL->NumConcatenated = NumStrs;
863 void StringLiteral::outputString(raw_ostream &OS) const {
865 case Ascii: break; // no prefix.
866 case Wide: OS << 'L'; break;
867 case UTF8: OS << "u8"; break;
868 case UTF16: OS << 'u'; break;
869 case UTF32: OS << 'U'; break;
872 static const char Hex[] = "0123456789ABCDEF";
874 unsigned LastSlashX = getLength();
875 for (unsigned I = 0, N = getLength(); I != N; ++I) {
876 switch (uint32_t Char = getCodeUnit(I)) {
878 // FIXME: Convert UTF-8 back to codepoints before rendering.
880 // Convert UTF-16 surrogate pairs back to codepoints before rendering.
881 // Leave invalid surrogates alone; we'll use \x for those.
882 if (getKind() == UTF16 && I != N - 1 && Char >= 0xd800 &&
884 uint32_t Trail = getCodeUnit(I + 1);
885 if (Trail >= 0xdc00 && Trail <= 0xdfff) {
886 Char = 0x10000 + ((Char - 0xd800) << 10) + (Trail - 0xdc00);
892 // If this is a wide string, output characters over 0xff using \x
893 // escapes. Otherwise, this is a UTF-16 or UTF-32 string, and Char is a
894 // codepoint: use \x escapes for invalid codepoints.
895 if (getKind() == Wide ||
896 (Char >= 0xd800 && Char <= 0xdfff) || Char >= 0x110000) {
897 // FIXME: Is this the best way to print wchar_t?
900 while ((Char >> Shift) == 0)
902 for (/**/; Shift >= 0; Shift -= 4)
903 OS << Hex[(Char >> Shift) & 15];
910 << Hex[(Char >> 20) & 15]
911 << Hex[(Char >> 16) & 15];
914 OS << Hex[(Char >> 12) & 15]
915 << Hex[(Char >> 8) & 15]
916 << Hex[(Char >> 4) & 15]
917 << Hex[(Char >> 0) & 15];
921 // If we used \x... for the previous character, and this character is a
922 // hexadecimal digit, prevent it being slurped as part of the \x.
923 if (LastSlashX + 1 == I) {
925 case '0': case '1': case '2': case '3': case '4':
926 case '5': case '6': case '7': case '8': case '9':
927 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
928 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
933 assert(Char <= 0xff &&
934 "Characters above 0xff should already have been handled.");
936 if (isPrintable(Char))
938 else // Output anything hard as an octal escape.
940 << (char)('0' + ((Char >> 6) & 7))
941 << (char)('0' + ((Char >> 3) & 7))
942 << (char)('0' + ((Char >> 0) & 7));
944 // Handle some common non-printable cases to make dumps prettier.
945 case '\\': OS << "\\\\"; break;
946 case '"': OS << "\\\""; break;
947 case '\n': OS << "\\n"; break;
948 case '\t': OS << "\\t"; break;
949 case '\a': OS << "\\a"; break;
950 case '\b': OS << "\\b"; break;
956 void StringLiteral::setString(const ASTContext &C, StringRef Str,
957 StringKind Kind, bool IsPascal) {
958 //FIXME: we assume that the string data comes from a target that uses the same
959 // code unit size and endianess for the type of string.
961 this->IsPascal = IsPascal;
963 CharByteWidth = mapCharByteWidth(C.getTargetInfo(),Kind);
964 assert((Str.size()%CharByteWidth == 0)
965 && "size of data must be multiple of CharByteWidth");
966 Length = Str.size()/CharByteWidth;
968 switch(CharByteWidth) {
970 char *AStrData = new (C) char[Length];
971 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
972 StrData.asChar = AStrData;
976 uint16_t *AStrData = new (C) uint16_t[Length];
977 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
978 StrData.asUInt16 = AStrData;
982 uint32_t *AStrData = new (C) uint32_t[Length];
983 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
984 StrData.asUInt32 = AStrData;
988 assert(false && "unsupported CharByteWidth");
992 /// getLocationOfByte - Return a source location that points to the specified
993 /// byte of this string literal.
995 /// Strings are amazingly complex. They can be formed from multiple tokens and
996 /// can have escape sequences in them in addition to the usual trigraph and
997 /// escaped newline business. This routine handles this complexity.
999 /// The *StartToken sets the first token to be searched in this function and
1000 /// the *StartTokenByteOffset is the byte offset of the first token. Before
1001 /// returning, it updates the *StartToken to the TokNo of the token being found
1002 /// and sets *StartTokenByteOffset to the byte offset of the token in the
1004 /// Using these two parameters can reduce the time complexity from O(n^2) to
1005 /// O(n) if one wants to get the location of byte for all the tokens in a
1009 StringLiteral::getLocationOfByte(unsigned ByteNo, const SourceManager &SM,
1010 const LangOptions &Features,
1011 const TargetInfo &Target, unsigned *StartToken,
1012 unsigned *StartTokenByteOffset) const {
1013 assert((Kind == StringLiteral::Ascii || Kind == StringLiteral::UTF8) &&
1014 "Only narrow string literals are currently supported");
1016 // Loop over all of the tokens in this string until we find the one that
1017 // contains the byte we're looking for.
1019 unsigned StringOffset = 0;
1021 TokNo = *StartToken;
1022 if (StartTokenByteOffset) {
1023 StringOffset = *StartTokenByteOffset;
1024 ByteNo -= StringOffset;
1027 assert(TokNo < getNumConcatenated() && "Invalid byte number!");
1028 SourceLocation StrTokLoc = getStrTokenLoc(TokNo);
1030 // Get the spelling of the string so that we can get the data that makes up
1031 // the string literal, not the identifier for the macro it is potentially
1032 // expanded through.
1033 SourceLocation StrTokSpellingLoc = SM.getSpellingLoc(StrTokLoc);
1035 // Re-lex the token to get its length and original spelling.
1036 std::pair<FileID, unsigned> LocInfo =
1037 SM.getDecomposedLoc(StrTokSpellingLoc);
1038 bool Invalid = false;
1039 StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid);
1041 if (StartTokenByteOffset != nullptr)
1042 *StartTokenByteOffset = StringOffset;
1043 if (StartToken != nullptr)
1044 *StartToken = TokNo;
1045 return StrTokSpellingLoc;
1048 const char *StrData = Buffer.data()+LocInfo.second;
1050 // Create a lexer starting at the beginning of this token.
1051 Lexer TheLexer(SM.getLocForStartOfFile(LocInfo.first), Features,
1052 Buffer.begin(), StrData, Buffer.end());
1054 TheLexer.LexFromRawLexer(TheTok);
1056 // Use the StringLiteralParser to compute the length of the string in bytes.
1057 StringLiteralParser SLP(TheTok, SM, Features, Target);
1058 unsigned TokNumBytes = SLP.GetStringLength();
1060 // If the byte is in this token, return the location of the byte.
1061 if (ByteNo < TokNumBytes ||
1062 (ByteNo == TokNumBytes && TokNo == getNumConcatenated() - 1)) {
1063 unsigned Offset = SLP.getOffsetOfStringByte(TheTok, ByteNo);
1065 // Now that we know the offset of the token in the spelling, use the
1066 // preprocessor to get the offset in the original source.
1067 if (StartTokenByteOffset != nullptr)
1068 *StartTokenByteOffset = StringOffset;
1069 if (StartToken != nullptr)
1070 *StartToken = TokNo;
1071 return Lexer::AdvanceToTokenCharacter(StrTokLoc, Offset, SM, Features);
1074 // Move to the next string token.
1075 StringOffset += TokNumBytes;
1077 ByteNo -= TokNumBytes;
1083 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1084 /// corresponds to, e.g. "sizeof" or "[pre]++".
1085 StringRef UnaryOperator::getOpcodeStr(Opcode Op) {
1087 case UO_PostInc: return "++";
1088 case UO_PostDec: return "--";
1089 case UO_PreInc: return "++";
1090 case UO_PreDec: return "--";
1091 case UO_AddrOf: return "&";
1092 case UO_Deref: return "*";
1093 case UO_Plus: return "+";
1094 case UO_Minus: return "-";
1095 case UO_Not: return "~";
1096 case UO_LNot: return "!";
1097 case UO_Real: return "__real";
1098 case UO_Imag: return "__imag";
1099 case UO_Extension: return "__extension__";
1100 case UO_Coawait: return "co_await";
1102 llvm_unreachable("Unknown unary operator");
1106 UnaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix) {
1108 default: llvm_unreachable("No unary operator for overloaded function");
1109 case OO_PlusPlus: return Postfix ? UO_PostInc : UO_PreInc;
1110 case OO_MinusMinus: return Postfix ? UO_PostDec : UO_PreDec;
1111 case OO_Amp: return UO_AddrOf;
1112 case OO_Star: return UO_Deref;
1113 case OO_Plus: return UO_Plus;
1114 case OO_Minus: return UO_Minus;
1115 case OO_Tilde: return UO_Not;
1116 case OO_Exclaim: return UO_LNot;
1117 case OO_Coawait: return UO_Coawait;
1121 OverloadedOperatorKind UnaryOperator::getOverloadedOperator(Opcode Opc) {
1123 case UO_PostInc: case UO_PreInc: return OO_PlusPlus;
1124 case UO_PostDec: case UO_PreDec: return OO_MinusMinus;
1125 case UO_AddrOf: return OO_Amp;
1126 case UO_Deref: return OO_Star;
1127 case UO_Plus: return OO_Plus;
1128 case UO_Minus: return OO_Minus;
1129 case UO_Not: return OO_Tilde;
1130 case UO_LNot: return OO_Exclaim;
1131 case UO_Coawait: return OO_Coawait;
1132 default: return OO_None;
1137 //===----------------------------------------------------------------------===//
1138 // Postfix Operators.
1139 //===----------------------------------------------------------------------===//
1141 CallExpr::CallExpr(const ASTContext& C, StmtClass SC, Expr *fn,
1142 unsigned NumPreArgs, ArrayRef<Expr*> args, QualType t,
1143 ExprValueKind VK, SourceLocation rparenloc)
1144 : Expr(SC, t, VK, OK_Ordinary,
1145 fn->isTypeDependent(),
1146 fn->isValueDependent(),
1147 fn->isInstantiationDependent(),
1148 fn->containsUnexpandedParameterPack()),
1149 NumArgs(args.size()) {
1151 SubExprs = new (C) Stmt*[args.size()+PREARGS_START+NumPreArgs];
1153 for (unsigned i = 0; i != args.size(); ++i) {
1154 if (args[i]->isTypeDependent())
1155 ExprBits.TypeDependent = true;
1156 if (args[i]->isValueDependent())
1157 ExprBits.ValueDependent = true;
1158 if (args[i]->isInstantiationDependent())
1159 ExprBits.InstantiationDependent = true;
1160 if (args[i]->containsUnexpandedParameterPack())
1161 ExprBits.ContainsUnexpandedParameterPack = true;
1163 SubExprs[i+PREARGS_START+NumPreArgs] = args[i];
1166 CallExprBits.NumPreArgs = NumPreArgs;
1167 RParenLoc = rparenloc;
1170 CallExpr::CallExpr(const ASTContext &C, Expr *fn, ArrayRef<Expr *> args,
1171 QualType t, ExprValueKind VK, SourceLocation rparenloc)
1172 : CallExpr(C, CallExprClass, fn, /*NumPreArgs=*/0, args, t, VK, rparenloc) {
1175 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, EmptyShell Empty)
1176 : CallExpr(C, SC, /*NumPreArgs=*/0, Empty) {}
1178 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, unsigned NumPreArgs,
1180 : Expr(SC, Empty), SubExprs(nullptr), NumArgs(0) {
1181 // FIXME: Why do we allocate this?
1182 SubExprs = new (C) Stmt*[PREARGS_START+NumPreArgs];
1183 CallExprBits.NumPreArgs = NumPreArgs;
1186 Decl *CallExpr::getCalleeDecl() {
1187 Expr *CEE = getCallee()->IgnoreParenImpCasts();
1189 while (SubstNonTypeTemplateParmExpr *NTTP
1190 = dyn_cast<SubstNonTypeTemplateParmExpr>(CEE)) {
1191 CEE = NTTP->getReplacement()->IgnoreParenCasts();
1194 // If we're calling a dereference, look at the pointer instead.
1195 if (BinaryOperator *BO = dyn_cast<BinaryOperator>(CEE)) {
1196 if (BO->isPtrMemOp())
1197 CEE = BO->getRHS()->IgnoreParenCasts();
1198 } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(CEE)) {
1199 if (UO->getOpcode() == UO_Deref)
1200 CEE = UO->getSubExpr()->IgnoreParenCasts();
1202 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE))
1203 return DRE->getDecl();
1204 if (MemberExpr *ME = dyn_cast<MemberExpr>(CEE))
1205 return ME->getMemberDecl();
1210 FunctionDecl *CallExpr::getDirectCallee() {
1211 return dyn_cast_or_null<FunctionDecl>(getCalleeDecl());
1214 /// setNumArgs - This changes the number of arguments present in this call.
1215 /// Any orphaned expressions are deleted by this, and any new operands are set
1217 void CallExpr::setNumArgs(const ASTContext& C, unsigned NumArgs) {
1218 // No change, just return.
1219 if (NumArgs == getNumArgs()) return;
1221 // If shrinking # arguments, just delete the extras and forgot them.
1222 if (NumArgs < getNumArgs()) {
1223 this->NumArgs = NumArgs;
1227 // Otherwise, we are growing the # arguments. New an bigger argument array.
1228 unsigned NumPreArgs = getNumPreArgs();
1229 Stmt **NewSubExprs = new (C) Stmt*[NumArgs+PREARGS_START+NumPreArgs];
1231 for (unsigned i = 0; i != getNumArgs()+PREARGS_START+NumPreArgs; ++i)
1232 NewSubExprs[i] = SubExprs[i];
1233 // Null out new args.
1234 for (unsigned i = getNumArgs()+PREARGS_START+NumPreArgs;
1235 i != NumArgs+PREARGS_START+NumPreArgs; ++i)
1236 NewSubExprs[i] = nullptr;
1238 if (SubExprs) C.Deallocate(SubExprs);
1239 SubExprs = NewSubExprs;
1240 this->NumArgs = NumArgs;
1243 /// getBuiltinCallee - If this is a call to a builtin, return the builtin ID. If
1245 unsigned CallExpr::getBuiltinCallee() const {
1246 // All simple function calls (e.g. func()) are implicitly cast to pointer to
1247 // function. As a result, we try and obtain the DeclRefExpr from the
1248 // ImplicitCastExpr.
1249 const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee());
1250 if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()).
1253 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr());
1257 const FunctionDecl *FDecl = dyn_cast<FunctionDecl>(DRE->getDecl());
1261 if (!FDecl->getIdentifier())
1264 return FDecl->getBuiltinID();
1267 bool CallExpr::isUnevaluatedBuiltinCall(const ASTContext &Ctx) const {
1268 if (unsigned BI = getBuiltinCallee())
1269 return Ctx.BuiltinInfo.isUnevaluated(BI);
1273 QualType CallExpr::getCallReturnType(const ASTContext &Ctx) const {
1274 const Expr *Callee = getCallee();
1275 QualType CalleeType = Callee->getType();
1276 if (const auto *FnTypePtr = CalleeType->getAs<PointerType>()) {
1277 CalleeType = FnTypePtr->getPointeeType();
1278 } else if (const auto *BPT = CalleeType->getAs<BlockPointerType>()) {
1279 CalleeType = BPT->getPointeeType();
1280 } else if (CalleeType->isSpecificPlaceholderType(BuiltinType::BoundMember)) {
1281 if (isa<CXXPseudoDestructorExpr>(Callee->IgnoreParens()))
1284 // This should never be overloaded and so should never return null.
1285 CalleeType = Expr::findBoundMemberType(Callee);
1288 const FunctionType *FnType = CalleeType->castAs<FunctionType>();
1289 return FnType->getReturnType();
1292 SourceLocation CallExpr::getLocStart() const {
1293 if (isa<CXXOperatorCallExpr>(this))
1294 return cast<CXXOperatorCallExpr>(this)->getLocStart();
1296 SourceLocation begin = getCallee()->getLocStart();
1297 if (begin.isInvalid() && getNumArgs() > 0 && getArg(0))
1298 begin = getArg(0)->getLocStart();
1301 SourceLocation CallExpr::getLocEnd() const {
1302 if (isa<CXXOperatorCallExpr>(this))
1303 return cast<CXXOperatorCallExpr>(this)->getLocEnd();
1305 SourceLocation end = getRParenLoc();
1306 if (end.isInvalid() && getNumArgs() > 0 && getArg(getNumArgs() - 1))
1307 end = getArg(getNumArgs() - 1)->getLocEnd();
1311 OffsetOfExpr *OffsetOfExpr::Create(const ASTContext &C, QualType type,
1312 SourceLocation OperatorLoc,
1313 TypeSourceInfo *tsi,
1314 ArrayRef<OffsetOfNode> comps,
1315 ArrayRef<Expr*> exprs,
1316 SourceLocation RParenLoc) {
1317 void *Mem = C.Allocate(sizeof(OffsetOfExpr) +
1318 sizeof(OffsetOfNode) * comps.size() +
1319 sizeof(Expr*) * exprs.size());
1321 return new (Mem) OffsetOfExpr(C, type, OperatorLoc, tsi, comps, exprs,
1325 OffsetOfExpr *OffsetOfExpr::CreateEmpty(const ASTContext &C,
1326 unsigned numComps, unsigned numExprs) {
1327 void *Mem = C.Allocate(sizeof(OffsetOfExpr) +
1328 sizeof(OffsetOfNode) * numComps +
1329 sizeof(Expr*) * numExprs);
1330 return new (Mem) OffsetOfExpr(numComps, numExprs);
1333 OffsetOfExpr::OffsetOfExpr(const ASTContext &C, QualType type,
1334 SourceLocation OperatorLoc, TypeSourceInfo *tsi,
1335 ArrayRef<OffsetOfNode> comps, ArrayRef<Expr*> exprs,
1336 SourceLocation RParenLoc)
1337 : Expr(OffsetOfExprClass, type, VK_RValue, OK_Ordinary,
1338 /*TypeDependent=*/false,
1339 /*ValueDependent=*/tsi->getType()->isDependentType(),
1340 tsi->getType()->isInstantiationDependentType(),
1341 tsi->getType()->containsUnexpandedParameterPack()),
1342 OperatorLoc(OperatorLoc), RParenLoc(RParenLoc), TSInfo(tsi),
1343 NumComps(comps.size()), NumExprs(exprs.size())
1345 for (unsigned i = 0; i != comps.size(); ++i) {
1346 setComponent(i, comps[i]);
1349 for (unsigned i = 0; i != exprs.size(); ++i) {
1350 if (exprs[i]->isTypeDependent() || exprs[i]->isValueDependent())
1351 ExprBits.ValueDependent = true;
1352 if (exprs[i]->containsUnexpandedParameterPack())
1353 ExprBits.ContainsUnexpandedParameterPack = true;
1355 setIndexExpr(i, exprs[i]);
1359 IdentifierInfo *OffsetOfExpr::OffsetOfNode::getFieldName() const {
1360 assert(getKind() == Field || getKind() == Identifier);
1361 if (getKind() == Field)
1362 return getField()->getIdentifier();
1364 return reinterpret_cast<IdentifierInfo *> (Data & ~(uintptr_t)Mask);
1367 UnaryExprOrTypeTraitExpr::UnaryExprOrTypeTraitExpr(
1368 UnaryExprOrTypeTrait ExprKind, Expr *E, QualType resultType,
1369 SourceLocation op, SourceLocation rp)
1370 : Expr(UnaryExprOrTypeTraitExprClass, resultType, VK_RValue, OK_Ordinary,
1371 false, // Never type-dependent (C++ [temp.dep.expr]p3).
1372 // Value-dependent if the argument is type-dependent.
1373 E->isTypeDependent(), E->isInstantiationDependent(),
1374 E->containsUnexpandedParameterPack()),
1375 OpLoc(op), RParenLoc(rp) {
1376 UnaryExprOrTypeTraitExprBits.Kind = ExprKind;
1377 UnaryExprOrTypeTraitExprBits.IsType = false;
1380 // Check to see if we are in the situation where alignof(decl) should be
1381 // dependent because decl's alignment is dependent.
1382 if (ExprKind == UETT_AlignOf) {
1383 if (!isValueDependent() || !isInstantiationDependent()) {
1384 E = E->IgnoreParens();
1386 const ValueDecl *D = nullptr;
1387 if (const auto *DRE = dyn_cast<DeclRefExpr>(E))
1389 else if (const auto *ME = dyn_cast<MemberExpr>(E))
1390 D = ME->getMemberDecl();
1393 for (const auto *I : D->specific_attrs<AlignedAttr>()) {
1394 if (I->isAlignmentDependent()) {
1395 setValueDependent(true);
1396 setInstantiationDependent(true);
1405 MemberExpr *MemberExpr::Create(
1406 const ASTContext &C, Expr *base, bool isarrow, SourceLocation OperatorLoc,
1407 NestedNameSpecifierLoc QualifierLoc, SourceLocation TemplateKWLoc,
1408 ValueDecl *memberdecl, DeclAccessPair founddecl,
1409 DeclarationNameInfo nameinfo, const TemplateArgumentListInfo *targs,
1410 QualType ty, ExprValueKind vk, ExprObjectKind ok) {
1412 bool hasQualOrFound = (QualifierLoc ||
1413 founddecl.getDecl() != memberdecl ||
1414 founddecl.getAccess() != memberdecl->getAccess());
1416 bool HasTemplateKWAndArgsInfo = targs || TemplateKWLoc.isValid();
1418 totalSizeToAlloc<MemberExprNameQualifier, ASTTemplateKWAndArgsInfo,
1419 TemplateArgumentLoc>(hasQualOrFound ? 1 : 0,
1420 HasTemplateKWAndArgsInfo ? 1 : 0,
1421 targs ? targs->size() : 0);
1423 void *Mem = C.Allocate(Size, llvm::alignOf<MemberExpr>());
1424 MemberExpr *E = new (Mem)
1425 MemberExpr(base, isarrow, OperatorLoc, memberdecl, nameinfo, ty, vk, ok);
1427 if (hasQualOrFound) {
1428 // FIXME: Wrong. We should be looking at the member declaration we found.
1429 if (QualifierLoc && QualifierLoc.getNestedNameSpecifier()->isDependent()) {
1430 E->setValueDependent(true);
1431 E->setTypeDependent(true);
1432 E->setInstantiationDependent(true);
1434 else if (QualifierLoc &&
1435 QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent())
1436 E->setInstantiationDependent(true);
1438 E->HasQualifierOrFoundDecl = true;
1440 MemberExprNameQualifier *NQ =
1441 E->getTrailingObjects<MemberExprNameQualifier>();
1442 NQ->QualifierLoc = QualifierLoc;
1443 NQ->FoundDecl = founddecl;
1446 E->HasTemplateKWAndArgsInfo = (targs || TemplateKWLoc.isValid());
1449 bool Dependent = false;
1450 bool InstantiationDependent = false;
1451 bool ContainsUnexpandedParameterPack = false;
1452 E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
1453 TemplateKWLoc, *targs, E->getTrailingObjects<TemplateArgumentLoc>(),
1454 Dependent, InstantiationDependent, ContainsUnexpandedParameterPack);
1455 if (InstantiationDependent)
1456 E->setInstantiationDependent(true);
1457 } else if (TemplateKWLoc.isValid()) {
1458 E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
1465 SourceLocation MemberExpr::getLocStart() const {
1466 if (isImplicitAccess()) {
1468 return getQualifierLoc().getBeginLoc();
1472 // FIXME: We don't want this to happen. Rather, we should be able to
1473 // detect all kinds of implicit accesses more cleanly.
1474 SourceLocation BaseStartLoc = getBase()->getLocStart();
1475 if (BaseStartLoc.isValid())
1476 return BaseStartLoc;
1479 SourceLocation MemberExpr::getLocEnd() const {
1480 SourceLocation EndLoc = getMemberNameInfo().getEndLoc();
1481 if (hasExplicitTemplateArgs())
1482 EndLoc = getRAngleLoc();
1483 else if (EndLoc.isInvalid())
1484 EndLoc = getBase()->getLocEnd();
1488 bool CastExpr::CastConsistency() const {
1489 switch (getCastKind()) {
1490 case CK_DerivedToBase:
1491 case CK_UncheckedDerivedToBase:
1492 case CK_DerivedToBaseMemberPointer:
1493 case CK_BaseToDerived:
1494 case CK_BaseToDerivedMemberPointer:
1495 assert(!path_empty() && "Cast kind should have a base path!");
1498 case CK_CPointerToObjCPointerCast:
1499 assert(getType()->isObjCObjectPointerType());
1500 assert(getSubExpr()->getType()->isPointerType());
1501 goto CheckNoBasePath;
1503 case CK_BlockPointerToObjCPointerCast:
1504 assert(getType()->isObjCObjectPointerType());
1505 assert(getSubExpr()->getType()->isBlockPointerType());
1506 goto CheckNoBasePath;
1508 case CK_ReinterpretMemberPointer:
1509 assert(getType()->isMemberPointerType());
1510 assert(getSubExpr()->getType()->isMemberPointerType());
1511 goto CheckNoBasePath;
1514 // Arbitrary casts to C pointer types count as bitcasts.
1515 // Otherwise, we should only have block and ObjC pointer casts
1516 // here if they stay within the type kind.
1517 if (!getType()->isPointerType()) {
1518 assert(getType()->isObjCObjectPointerType() ==
1519 getSubExpr()->getType()->isObjCObjectPointerType());
1520 assert(getType()->isBlockPointerType() ==
1521 getSubExpr()->getType()->isBlockPointerType());
1523 goto CheckNoBasePath;
1525 case CK_AnyPointerToBlockPointerCast:
1526 assert(getType()->isBlockPointerType());
1527 assert(getSubExpr()->getType()->isAnyPointerType() &&
1528 !getSubExpr()->getType()->isBlockPointerType());
1529 goto CheckNoBasePath;
1531 case CK_CopyAndAutoreleaseBlockObject:
1532 assert(getType()->isBlockPointerType());
1533 assert(getSubExpr()->getType()->isBlockPointerType());
1534 goto CheckNoBasePath;
1536 case CK_FunctionToPointerDecay:
1537 assert(getType()->isPointerType());
1538 assert(getSubExpr()->getType()->isFunctionType());
1539 goto CheckNoBasePath;
1541 case CK_AddressSpaceConversion:
1542 assert(getType()->isPointerType());
1543 assert(getSubExpr()->getType()->isPointerType());
1544 assert(getType()->getPointeeType().getAddressSpace() !=
1545 getSubExpr()->getType()->getPointeeType().getAddressSpace());
1546 // These should not have an inheritance path.
1549 case CK_ArrayToPointerDecay:
1550 case CK_NullToMemberPointer:
1551 case CK_NullToPointer:
1552 case CK_ConstructorConversion:
1553 case CK_IntegralToPointer:
1554 case CK_PointerToIntegral:
1556 case CK_VectorSplat:
1557 case CK_IntegralCast:
1558 case CK_IntegralToFloating:
1559 case CK_FloatingToIntegral:
1560 case CK_FloatingCast:
1561 case CK_ObjCObjectLValueCast:
1562 case CK_FloatingRealToComplex:
1563 case CK_FloatingComplexToReal:
1564 case CK_FloatingComplexCast:
1565 case CK_FloatingComplexToIntegralComplex:
1566 case CK_IntegralRealToComplex:
1567 case CK_IntegralComplexToReal:
1568 case CK_IntegralComplexCast:
1569 case CK_IntegralComplexToFloatingComplex:
1570 case CK_ARCProduceObject:
1571 case CK_ARCConsumeObject:
1572 case CK_ARCReclaimReturnedObject:
1573 case CK_ARCExtendBlockObject:
1574 case CK_ZeroToOCLEvent:
1575 assert(!getType()->isBooleanType() && "unheralded conversion to bool");
1576 goto CheckNoBasePath;
1579 case CK_LValueToRValue:
1581 case CK_AtomicToNonAtomic:
1582 case CK_NonAtomicToAtomic:
1583 case CK_PointerToBoolean:
1584 case CK_IntegralToBoolean:
1585 case CK_FloatingToBoolean:
1586 case CK_MemberPointerToBoolean:
1587 case CK_FloatingComplexToBoolean:
1588 case CK_IntegralComplexToBoolean:
1589 case CK_LValueBitCast: // -> bool&
1590 case CK_UserDefinedConversion: // operator bool()
1591 case CK_BuiltinFnToFnPtr:
1593 assert(path_empty() && "Cast kind should not have a base path!");
1599 const char *CastExpr::getCastKindName() const {
1600 switch (getCastKind()) {
1605 case CK_LValueBitCast:
1606 return "LValueBitCast";
1607 case CK_LValueToRValue:
1608 return "LValueToRValue";
1611 case CK_BaseToDerived:
1612 return "BaseToDerived";
1613 case CK_DerivedToBase:
1614 return "DerivedToBase";
1615 case CK_UncheckedDerivedToBase:
1616 return "UncheckedDerivedToBase";
1621 case CK_ArrayToPointerDecay:
1622 return "ArrayToPointerDecay";
1623 case CK_FunctionToPointerDecay:
1624 return "FunctionToPointerDecay";
1625 case CK_NullToMemberPointer:
1626 return "NullToMemberPointer";
1627 case CK_NullToPointer:
1628 return "NullToPointer";
1629 case CK_BaseToDerivedMemberPointer:
1630 return "BaseToDerivedMemberPointer";
1631 case CK_DerivedToBaseMemberPointer:
1632 return "DerivedToBaseMemberPointer";
1633 case CK_ReinterpretMemberPointer:
1634 return "ReinterpretMemberPointer";
1635 case CK_UserDefinedConversion:
1636 return "UserDefinedConversion";
1637 case CK_ConstructorConversion:
1638 return "ConstructorConversion";
1639 case CK_IntegralToPointer:
1640 return "IntegralToPointer";
1641 case CK_PointerToIntegral:
1642 return "PointerToIntegral";
1643 case CK_PointerToBoolean:
1644 return "PointerToBoolean";
1647 case CK_VectorSplat:
1648 return "VectorSplat";
1649 case CK_IntegralCast:
1650 return "IntegralCast";
1651 case CK_IntegralToBoolean:
1652 return "IntegralToBoolean";
1653 case CK_IntegralToFloating:
1654 return "IntegralToFloating";
1655 case CK_FloatingToIntegral:
1656 return "FloatingToIntegral";
1657 case CK_FloatingCast:
1658 return "FloatingCast";
1659 case CK_FloatingToBoolean:
1660 return "FloatingToBoolean";
1661 case CK_MemberPointerToBoolean:
1662 return "MemberPointerToBoolean";
1663 case CK_CPointerToObjCPointerCast:
1664 return "CPointerToObjCPointerCast";
1665 case CK_BlockPointerToObjCPointerCast:
1666 return "BlockPointerToObjCPointerCast";
1667 case CK_AnyPointerToBlockPointerCast:
1668 return "AnyPointerToBlockPointerCast";
1669 case CK_ObjCObjectLValueCast:
1670 return "ObjCObjectLValueCast";
1671 case CK_FloatingRealToComplex:
1672 return "FloatingRealToComplex";
1673 case CK_FloatingComplexToReal:
1674 return "FloatingComplexToReal";
1675 case CK_FloatingComplexToBoolean:
1676 return "FloatingComplexToBoolean";
1677 case CK_FloatingComplexCast:
1678 return "FloatingComplexCast";
1679 case CK_FloatingComplexToIntegralComplex:
1680 return "FloatingComplexToIntegralComplex";
1681 case CK_IntegralRealToComplex:
1682 return "IntegralRealToComplex";
1683 case CK_IntegralComplexToReal:
1684 return "IntegralComplexToReal";
1685 case CK_IntegralComplexToBoolean:
1686 return "IntegralComplexToBoolean";
1687 case CK_IntegralComplexCast:
1688 return "IntegralComplexCast";
1689 case CK_IntegralComplexToFloatingComplex:
1690 return "IntegralComplexToFloatingComplex";
1691 case CK_ARCConsumeObject:
1692 return "ARCConsumeObject";
1693 case CK_ARCProduceObject:
1694 return "ARCProduceObject";
1695 case CK_ARCReclaimReturnedObject:
1696 return "ARCReclaimReturnedObject";
1697 case CK_ARCExtendBlockObject:
1698 return "ARCExtendBlockObject";
1699 case CK_AtomicToNonAtomic:
1700 return "AtomicToNonAtomic";
1701 case CK_NonAtomicToAtomic:
1702 return "NonAtomicToAtomic";
1703 case CK_CopyAndAutoreleaseBlockObject:
1704 return "CopyAndAutoreleaseBlockObject";
1705 case CK_BuiltinFnToFnPtr:
1706 return "BuiltinFnToFnPtr";
1707 case CK_ZeroToOCLEvent:
1708 return "ZeroToOCLEvent";
1709 case CK_AddressSpaceConversion:
1710 return "AddressSpaceConversion";
1713 llvm_unreachable("Unhandled cast kind!");
1716 Expr *CastExpr::getSubExprAsWritten() {
1717 Expr *SubExpr = nullptr;
1720 SubExpr = E->getSubExpr();
1722 // Skip through reference binding to temporary.
1723 if (MaterializeTemporaryExpr *Materialize
1724 = dyn_cast<MaterializeTemporaryExpr>(SubExpr))
1725 SubExpr = Materialize->GetTemporaryExpr();
1727 // Skip any temporary bindings; they're implicit.
1728 if (CXXBindTemporaryExpr *Binder = dyn_cast<CXXBindTemporaryExpr>(SubExpr))
1729 SubExpr = Binder->getSubExpr();
1731 // Conversions by constructor and conversion functions have a
1732 // subexpression describing the call; strip it off.
1733 if (E->getCastKind() == CK_ConstructorConversion)
1734 SubExpr = cast<CXXConstructExpr>(SubExpr)->getArg(0);
1735 else if (E->getCastKind() == CK_UserDefinedConversion)
1736 SubExpr = cast<CXXMemberCallExpr>(SubExpr)->getImplicitObjectArgument();
1738 // If the subexpression we're left with is an implicit cast, look
1739 // through that, too.
1740 } while ((E = dyn_cast<ImplicitCastExpr>(SubExpr)));
1745 CXXBaseSpecifier **CastExpr::path_buffer() {
1746 switch (getStmtClass()) {
1747 #define ABSTRACT_STMT(x)
1748 #define CASTEXPR(Type, Base) \
1749 case Stmt::Type##Class: \
1750 return reinterpret_cast<CXXBaseSpecifier**>(static_cast<Type*>(this)+1);
1751 #define STMT(Type, Base)
1752 #include "clang/AST/StmtNodes.inc"
1754 llvm_unreachable("non-cast expressions not possible here");
1758 void CastExpr::setCastPath(const CXXCastPath &Path) {
1759 assert(Path.size() == path_size());
1760 memcpy(path_buffer(), Path.data(), Path.size() * sizeof(CXXBaseSpecifier*));
1763 ImplicitCastExpr *ImplicitCastExpr::Create(const ASTContext &C, QualType T,
1764 CastKind Kind, Expr *Operand,
1765 const CXXCastPath *BasePath,
1767 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1769 C.Allocate(sizeof(ImplicitCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1770 ImplicitCastExpr *E =
1771 new (Buffer) ImplicitCastExpr(T, Kind, Operand, PathSize, VK);
1772 if (PathSize) E->setCastPath(*BasePath);
1776 ImplicitCastExpr *ImplicitCastExpr::CreateEmpty(const ASTContext &C,
1777 unsigned PathSize) {
1779 C.Allocate(sizeof(ImplicitCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1780 return new (Buffer) ImplicitCastExpr(EmptyShell(), PathSize);
1784 CStyleCastExpr *CStyleCastExpr::Create(const ASTContext &C, QualType T,
1785 ExprValueKind VK, CastKind K, Expr *Op,
1786 const CXXCastPath *BasePath,
1787 TypeSourceInfo *WrittenTy,
1788 SourceLocation L, SourceLocation R) {
1789 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1791 C.Allocate(sizeof(CStyleCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1793 new (Buffer) CStyleCastExpr(T, VK, K, Op, PathSize, WrittenTy, L, R);
1794 if (PathSize) E->setCastPath(*BasePath);
1798 CStyleCastExpr *CStyleCastExpr::CreateEmpty(const ASTContext &C,
1799 unsigned PathSize) {
1801 C.Allocate(sizeof(CStyleCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1802 return new (Buffer) CStyleCastExpr(EmptyShell(), PathSize);
1805 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1806 /// corresponds to, e.g. "<<=".
1807 StringRef BinaryOperator::getOpcodeStr(Opcode Op) {
1809 case BO_PtrMemD: return ".*";
1810 case BO_PtrMemI: return "->*";
1811 case BO_Mul: return "*";
1812 case BO_Div: return "/";
1813 case BO_Rem: return "%";
1814 case BO_Add: return "+";
1815 case BO_Sub: return "-";
1816 case BO_Shl: return "<<";
1817 case BO_Shr: return ">>";
1818 case BO_LT: return "<";
1819 case BO_GT: return ">";
1820 case BO_LE: return "<=";
1821 case BO_GE: return ">=";
1822 case BO_EQ: return "==";
1823 case BO_NE: return "!=";
1824 case BO_And: return "&";
1825 case BO_Xor: return "^";
1826 case BO_Or: return "|";
1827 case BO_LAnd: return "&&";
1828 case BO_LOr: return "||";
1829 case BO_Assign: return "=";
1830 case BO_MulAssign: return "*=";
1831 case BO_DivAssign: return "/=";
1832 case BO_RemAssign: return "%=";
1833 case BO_AddAssign: return "+=";
1834 case BO_SubAssign: return "-=";
1835 case BO_ShlAssign: return "<<=";
1836 case BO_ShrAssign: return ">>=";
1837 case BO_AndAssign: return "&=";
1838 case BO_XorAssign: return "^=";
1839 case BO_OrAssign: return "|=";
1840 case BO_Comma: return ",";
1843 llvm_unreachable("Invalid OpCode!");
1847 BinaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO) {
1849 default: llvm_unreachable("Not an overloadable binary operator");
1850 case OO_Plus: return BO_Add;
1851 case OO_Minus: return BO_Sub;
1852 case OO_Star: return BO_Mul;
1853 case OO_Slash: return BO_Div;
1854 case OO_Percent: return BO_Rem;
1855 case OO_Caret: return BO_Xor;
1856 case OO_Amp: return BO_And;
1857 case OO_Pipe: return BO_Or;
1858 case OO_Equal: return BO_Assign;
1859 case OO_Less: return BO_LT;
1860 case OO_Greater: return BO_GT;
1861 case OO_PlusEqual: return BO_AddAssign;
1862 case OO_MinusEqual: return BO_SubAssign;
1863 case OO_StarEqual: return BO_MulAssign;
1864 case OO_SlashEqual: return BO_DivAssign;
1865 case OO_PercentEqual: return BO_RemAssign;
1866 case OO_CaretEqual: return BO_XorAssign;
1867 case OO_AmpEqual: return BO_AndAssign;
1868 case OO_PipeEqual: return BO_OrAssign;
1869 case OO_LessLess: return BO_Shl;
1870 case OO_GreaterGreater: return BO_Shr;
1871 case OO_LessLessEqual: return BO_ShlAssign;
1872 case OO_GreaterGreaterEqual: return BO_ShrAssign;
1873 case OO_EqualEqual: return BO_EQ;
1874 case OO_ExclaimEqual: return BO_NE;
1875 case OO_LessEqual: return BO_LE;
1876 case OO_GreaterEqual: return BO_GE;
1877 case OO_AmpAmp: return BO_LAnd;
1878 case OO_PipePipe: return BO_LOr;
1879 case OO_Comma: return BO_Comma;
1880 case OO_ArrowStar: return BO_PtrMemI;
1884 OverloadedOperatorKind BinaryOperator::getOverloadedOperator(Opcode Opc) {
1885 static const OverloadedOperatorKind OverOps[] = {
1886 /* .* Cannot be overloaded */OO_None, OO_ArrowStar,
1887 OO_Star, OO_Slash, OO_Percent,
1889 OO_LessLess, OO_GreaterGreater,
1890 OO_Less, OO_Greater, OO_LessEqual, OO_GreaterEqual,
1891 OO_EqualEqual, OO_ExclaimEqual,
1897 OO_Equal, OO_StarEqual,
1898 OO_SlashEqual, OO_PercentEqual,
1899 OO_PlusEqual, OO_MinusEqual,
1900 OO_LessLessEqual, OO_GreaterGreaterEqual,
1901 OO_AmpEqual, OO_CaretEqual,
1905 return OverOps[Opc];
1908 InitListExpr::InitListExpr(const ASTContext &C, SourceLocation lbraceloc,
1909 ArrayRef<Expr*> initExprs, SourceLocation rbraceloc)
1910 : Expr(InitListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false,
1912 InitExprs(C, initExprs.size()),
1913 LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), AltForm(nullptr, true)
1915 sawArrayRangeDesignator(false);
1916 for (unsigned I = 0; I != initExprs.size(); ++I) {
1917 if (initExprs[I]->isTypeDependent())
1918 ExprBits.TypeDependent = true;
1919 if (initExprs[I]->isValueDependent())
1920 ExprBits.ValueDependent = true;
1921 if (initExprs[I]->isInstantiationDependent())
1922 ExprBits.InstantiationDependent = true;
1923 if (initExprs[I]->containsUnexpandedParameterPack())
1924 ExprBits.ContainsUnexpandedParameterPack = true;
1927 InitExprs.insert(C, InitExprs.end(), initExprs.begin(), initExprs.end());
1930 void InitListExpr::reserveInits(const ASTContext &C, unsigned NumInits) {
1931 if (NumInits > InitExprs.size())
1932 InitExprs.reserve(C, NumInits);
1935 void InitListExpr::resizeInits(const ASTContext &C, unsigned NumInits) {
1936 InitExprs.resize(C, NumInits, nullptr);
1939 Expr *InitListExpr::updateInit(const ASTContext &C, unsigned Init, Expr *expr) {
1940 if (Init >= InitExprs.size()) {
1941 InitExprs.insert(C, InitExprs.end(), Init - InitExprs.size() + 1, nullptr);
1942 setInit(Init, expr);
1946 Expr *Result = cast_or_null<Expr>(InitExprs[Init]);
1947 setInit(Init, expr);
1951 void InitListExpr::setArrayFiller(Expr *filler) {
1952 assert(!hasArrayFiller() && "Filler already set!");
1953 ArrayFillerOrUnionFieldInit = filler;
1954 // Fill out any "holes" in the array due to designated initializers.
1955 Expr **inits = getInits();
1956 for (unsigned i = 0, e = getNumInits(); i != e; ++i)
1957 if (inits[i] == nullptr)
1961 bool InitListExpr::isStringLiteralInit() const {
1962 if (getNumInits() != 1)
1964 const ArrayType *AT = getType()->getAsArrayTypeUnsafe();
1965 if (!AT || !AT->getElementType()->isIntegerType())
1967 // It is possible for getInit() to return null.
1968 const Expr *Init = getInit(0);
1971 Init = Init->IgnoreParens();
1972 return isa<StringLiteral>(Init) || isa<ObjCEncodeExpr>(Init);
1975 SourceLocation InitListExpr::getLocStart() const {
1976 if (InitListExpr *SyntacticForm = getSyntacticForm())
1977 return SyntacticForm->getLocStart();
1978 SourceLocation Beg = LBraceLoc;
1979 if (Beg.isInvalid()) {
1980 // Find the first non-null initializer.
1981 for (InitExprsTy::const_iterator I = InitExprs.begin(),
1982 E = InitExprs.end();
1985 Beg = S->getLocStart();
1993 SourceLocation InitListExpr::getLocEnd() const {
1994 if (InitListExpr *SyntacticForm = getSyntacticForm())
1995 return SyntacticForm->getLocEnd();
1996 SourceLocation End = RBraceLoc;
1997 if (End.isInvalid()) {
1998 // Find the first non-null initializer from the end.
1999 for (InitExprsTy::const_reverse_iterator I = InitExprs.rbegin(),
2000 E = InitExprs.rend();
2003 End = S->getLocEnd();
2011 /// getFunctionType - Return the underlying function type for this block.
2013 const FunctionProtoType *BlockExpr::getFunctionType() const {
2014 // The block pointer is never sugared, but the function type might be.
2015 return cast<BlockPointerType>(getType())
2016 ->getPointeeType()->castAs<FunctionProtoType>();
2019 SourceLocation BlockExpr::getCaretLocation() const {
2020 return TheBlock->getCaretLocation();
2022 const Stmt *BlockExpr::getBody() const {
2023 return TheBlock->getBody();
2025 Stmt *BlockExpr::getBody() {
2026 return TheBlock->getBody();
2030 //===----------------------------------------------------------------------===//
2031 // Generic Expression Routines
2032 //===----------------------------------------------------------------------===//
2034 /// isUnusedResultAWarning - Return true if this immediate expression should
2035 /// be warned about if the result is unused. If so, fill in Loc and Ranges
2036 /// with location to warn on and the source range[s] to report with the
2038 bool Expr::isUnusedResultAWarning(const Expr *&WarnE, SourceLocation &Loc,
2039 SourceRange &R1, SourceRange &R2,
2040 ASTContext &Ctx) const {
2041 // Don't warn if the expr is type dependent. The type could end up
2042 // instantiating to void.
2043 if (isTypeDependent())
2046 switch (getStmtClass()) {
2048 if (getType()->isVoidType())
2052 R1 = getSourceRange();
2054 case ParenExprClass:
2055 return cast<ParenExpr>(this)->getSubExpr()->
2056 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2057 case GenericSelectionExprClass:
2058 return cast<GenericSelectionExpr>(this)->getResultExpr()->
2059 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2060 case ChooseExprClass:
2061 return cast<ChooseExpr>(this)->getChosenSubExpr()->
2062 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2063 case UnaryOperatorClass: {
2064 const UnaryOperator *UO = cast<UnaryOperator>(this);
2066 switch (UO->getOpcode()) {
2075 // This is just the 'operator co_await' call inside the guts of a
2076 // dependent co_await call.
2080 case UO_PreDec: // ++/--
2081 return false; // Not a warning.
2084 // accessing a piece of a volatile complex is a side-effect.
2085 if (Ctx.getCanonicalType(UO->getSubExpr()->getType())
2086 .isVolatileQualified())
2090 return UO->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2093 Loc = UO->getOperatorLoc();
2094 R1 = UO->getSubExpr()->getSourceRange();
2097 case BinaryOperatorClass: {
2098 const BinaryOperator *BO = cast<BinaryOperator>(this);
2099 switch (BO->getOpcode()) {
2102 // Consider the RHS of comma for side effects. LHS was checked by
2103 // Sema::CheckCommaOperands.
2105 // ((foo = <blah>), 0) is an idiom for hiding the result (and
2106 // lvalue-ness) of an assignment written in a macro.
2107 if (IntegerLiteral *IE =
2108 dyn_cast<IntegerLiteral>(BO->getRHS()->IgnoreParens()))
2109 if (IE->getValue() == 0)
2111 return BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2112 // Consider '||', '&&' to have side effects if the LHS or RHS does.
2115 if (!BO->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) ||
2116 !BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2120 if (BO->isAssignmentOp())
2123 Loc = BO->getOperatorLoc();
2124 R1 = BO->getLHS()->getSourceRange();
2125 R2 = BO->getRHS()->getSourceRange();
2128 case CompoundAssignOperatorClass:
2129 case VAArgExprClass:
2130 case AtomicExprClass:
2133 case ConditionalOperatorClass: {
2134 // If only one of the LHS or RHS is a warning, the operator might
2135 // be being used for control flow. Only warn if both the LHS and
2136 // RHS are warnings.
2137 const ConditionalOperator *Exp = cast<ConditionalOperator>(this);
2138 if (!Exp->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2142 return Exp->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2145 case MemberExprClass:
2147 Loc = cast<MemberExpr>(this)->getMemberLoc();
2148 R1 = SourceRange(Loc, Loc);
2149 R2 = cast<MemberExpr>(this)->getBase()->getSourceRange();
2152 case ArraySubscriptExprClass:
2154 Loc = cast<ArraySubscriptExpr>(this)->getRBracketLoc();
2155 R1 = cast<ArraySubscriptExpr>(this)->getLHS()->getSourceRange();
2156 R2 = cast<ArraySubscriptExpr>(this)->getRHS()->getSourceRange();
2159 case CXXOperatorCallExprClass: {
2160 // Warn about operator ==,!=,<,>,<=, and >= even when user-defined operator
2161 // overloads as there is no reasonable way to define these such that they
2162 // have non-trivial, desirable side-effects. See the -Wunused-comparison
2163 // warning: operators == and != are commonly typo'ed, and so warning on them
2164 // provides additional value as well. If this list is updated,
2165 // DiagnoseUnusedComparison should be as well.
2166 const CXXOperatorCallExpr *Op = cast<CXXOperatorCallExpr>(this);
2167 switch (Op->getOperator()) {
2171 case OO_ExclaimEqual:
2174 case OO_GreaterEqual:
2176 if (Op->getCallReturnType(Ctx)->isReferenceType() ||
2177 Op->getCallReturnType(Ctx)->isVoidType())
2180 Loc = Op->getOperatorLoc();
2181 R1 = Op->getSourceRange();
2185 // Fallthrough for generic call handling.
2188 case CXXMemberCallExprClass:
2189 case UserDefinedLiteralClass: {
2190 // If this is a direct call, get the callee.
2191 const CallExpr *CE = cast<CallExpr>(this);
2192 if (const Decl *FD = CE->getCalleeDecl()) {
2193 const FunctionDecl *Func = dyn_cast<FunctionDecl>(FD);
2194 bool HasWarnUnusedResultAttr = Func ? Func->hasUnusedResultAttr()
2195 : FD->hasAttr<WarnUnusedResultAttr>();
2197 // If the callee has attribute pure, const, or warn_unused_result, warn
2198 // about it. void foo() { strlen("bar"); } should warn.
2200 // Note: If new cases are added here, DiagnoseUnusedExprResult should be
2201 // updated to match for QoI.
2202 if (HasWarnUnusedResultAttr ||
2203 FD->hasAttr<PureAttr>() || FD->hasAttr<ConstAttr>()) {
2205 Loc = CE->getCallee()->getLocStart();
2206 R1 = CE->getCallee()->getSourceRange();
2208 if (unsigned NumArgs = CE->getNumArgs())
2209 R2 = SourceRange(CE->getArg(0)->getLocStart(),
2210 CE->getArg(NumArgs-1)->getLocEnd());
2217 // If we don't know precisely what we're looking at, let's not warn.
2218 case UnresolvedLookupExprClass:
2219 case CXXUnresolvedConstructExprClass:
2222 case CXXTemporaryObjectExprClass:
2223 case CXXConstructExprClass: {
2224 if (const CXXRecordDecl *Type = getType()->getAsCXXRecordDecl()) {
2225 if (Type->hasAttr<WarnUnusedAttr>()) {
2227 Loc = getLocStart();
2228 R1 = getSourceRange();
2235 case ObjCMessageExprClass: {
2236 const ObjCMessageExpr *ME = cast<ObjCMessageExpr>(this);
2237 if (Ctx.getLangOpts().ObjCAutoRefCount &&
2238 ME->isInstanceMessage() &&
2239 !ME->getType()->isVoidType() &&
2240 ME->getMethodFamily() == OMF_init) {
2243 R1 = ME->getSourceRange();
2247 if (const ObjCMethodDecl *MD = ME->getMethodDecl())
2248 if (MD->hasAttr<WarnUnusedResultAttr>()) {
2257 case ObjCPropertyRefExprClass:
2260 R1 = getSourceRange();
2263 case PseudoObjectExprClass: {
2264 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
2266 // Only complain about things that have the form of a getter.
2267 if (isa<UnaryOperator>(PO->getSyntacticForm()) ||
2268 isa<BinaryOperator>(PO->getSyntacticForm()))
2273 R1 = getSourceRange();
2277 case StmtExprClass: {
2278 // Statement exprs don't logically have side effects themselves, but are
2279 // sometimes used in macros in ways that give them a type that is unused.
2280 // For example ({ blah; foo(); }) will end up with a type if foo has a type.
2281 // however, if the result of the stmt expr is dead, we don't want to emit a
2283 const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt();
2284 if (!CS->body_empty()) {
2285 if (const Expr *E = dyn_cast<Expr>(CS->body_back()))
2286 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2287 if (const LabelStmt *Label = dyn_cast<LabelStmt>(CS->body_back()))
2288 if (const Expr *E = dyn_cast<Expr>(Label->getSubStmt()))
2289 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2292 if (getType()->isVoidType())
2295 Loc = cast<StmtExpr>(this)->getLParenLoc();
2296 R1 = getSourceRange();
2299 case CXXFunctionalCastExprClass:
2300 case CStyleCastExprClass: {
2301 // Ignore an explicit cast to void unless the operand is a non-trivial
2303 const CastExpr *CE = cast<CastExpr>(this);
2304 if (CE->getCastKind() == CK_ToVoid) {
2305 if (CE->getSubExpr()->isGLValue() &&
2306 CE->getSubExpr()->getType().isVolatileQualified()) {
2307 const DeclRefExpr *DRE =
2308 dyn_cast<DeclRefExpr>(CE->getSubExpr()->IgnoreParens());
2309 if (!(DRE && isa<VarDecl>(DRE->getDecl()) &&
2310 cast<VarDecl>(DRE->getDecl())->hasLocalStorage())) {
2311 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc,
2318 // If this is a cast to a constructor conversion, check the operand.
2319 // Otherwise, the result of the cast is unused.
2320 if (CE->getCastKind() == CK_ConstructorConversion)
2321 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2324 if (const CXXFunctionalCastExpr *CXXCE =
2325 dyn_cast<CXXFunctionalCastExpr>(this)) {
2326 Loc = CXXCE->getLocStart();
2327 R1 = CXXCE->getSubExpr()->getSourceRange();
2329 const CStyleCastExpr *CStyleCE = cast<CStyleCastExpr>(this);
2330 Loc = CStyleCE->getLParenLoc();
2331 R1 = CStyleCE->getSubExpr()->getSourceRange();
2335 case ImplicitCastExprClass: {
2336 const CastExpr *ICE = cast<ImplicitCastExpr>(this);
2338 // lvalue-to-rvalue conversion on a volatile lvalue is a side-effect.
2339 if (ICE->getCastKind() == CK_LValueToRValue &&
2340 ICE->getSubExpr()->getType().isVolatileQualified())
2343 return ICE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2345 case CXXDefaultArgExprClass:
2346 return (cast<CXXDefaultArgExpr>(this)
2347 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2348 case CXXDefaultInitExprClass:
2349 return (cast<CXXDefaultInitExpr>(this)
2350 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2352 case CXXNewExprClass:
2353 // FIXME: In theory, there might be new expressions that don't have side
2354 // effects (e.g. a placement new with an uninitialized POD).
2355 case CXXDeleteExprClass:
2357 case CXXBindTemporaryExprClass:
2358 return (cast<CXXBindTemporaryExpr>(this)
2359 ->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2360 case ExprWithCleanupsClass:
2361 return (cast<ExprWithCleanups>(this)
2362 ->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2366 /// isOBJCGCCandidate - Check if an expression is objc gc'able.
2367 /// returns true, if it is; false otherwise.
2368 bool Expr::isOBJCGCCandidate(ASTContext &Ctx) const {
2369 const Expr *E = IgnoreParens();
2370 switch (E->getStmtClass()) {
2373 case ObjCIvarRefExprClass:
2375 case Expr::UnaryOperatorClass:
2376 return cast<UnaryOperator>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2377 case ImplicitCastExprClass:
2378 return cast<ImplicitCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2379 case MaterializeTemporaryExprClass:
2380 return cast<MaterializeTemporaryExpr>(E)->GetTemporaryExpr()
2381 ->isOBJCGCCandidate(Ctx);
2382 case CStyleCastExprClass:
2383 return cast<CStyleCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2384 case DeclRefExprClass: {
2385 const Decl *D = cast<DeclRefExpr>(E)->getDecl();
2387 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
2388 if (VD->hasGlobalStorage())
2390 QualType T = VD->getType();
2391 // dereferencing to a pointer is always a gc'able candidate,
2392 // unless it is __weak.
2393 return T->isPointerType() &&
2394 (Ctx.getObjCGCAttrKind(T) != Qualifiers::Weak);
2398 case MemberExprClass: {
2399 const MemberExpr *M = cast<MemberExpr>(E);
2400 return M->getBase()->isOBJCGCCandidate(Ctx);
2402 case ArraySubscriptExprClass:
2403 return cast<ArraySubscriptExpr>(E)->getBase()->isOBJCGCCandidate(Ctx);
2407 bool Expr::isBoundMemberFunction(ASTContext &Ctx) const {
2408 if (isTypeDependent())
2410 return ClassifyLValue(Ctx) == Expr::LV_MemberFunction;
2413 QualType Expr::findBoundMemberType(const Expr *expr) {
2414 assert(expr->hasPlaceholderType(BuiltinType::BoundMember));
2416 // Bound member expressions are always one of these possibilities:
2417 // x->m x.m x->*y x.*y
2418 // (possibly parenthesized)
2420 expr = expr->IgnoreParens();
2421 if (const MemberExpr *mem = dyn_cast<MemberExpr>(expr)) {
2422 assert(isa<CXXMethodDecl>(mem->getMemberDecl()));
2423 return mem->getMemberDecl()->getType();
2426 if (const BinaryOperator *op = dyn_cast<BinaryOperator>(expr)) {
2427 QualType type = op->getRHS()->getType()->castAs<MemberPointerType>()
2429 assert(type->isFunctionType());
2433 assert(isa<UnresolvedMemberExpr>(expr) || isa<CXXPseudoDestructorExpr>(expr));
2437 Expr* Expr::IgnoreParens() {
2440 if (ParenExpr* P = dyn_cast<ParenExpr>(E)) {
2441 E = P->getSubExpr();
2444 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) {
2445 if (P->getOpcode() == UO_Extension) {
2446 E = P->getSubExpr();
2450 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) {
2451 if (!P->isResultDependent()) {
2452 E = P->getResultExpr();
2456 if (ChooseExpr* P = dyn_cast<ChooseExpr>(E)) {
2457 if (!P->isConditionDependent()) {
2458 E = P->getChosenSubExpr();
2466 /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr
2467 /// or CastExprs or ImplicitCastExprs, returning their operand.
2468 Expr *Expr::IgnoreParenCasts() {
2471 E = E->IgnoreParens();
2472 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2473 E = P->getSubExpr();
2476 if (MaterializeTemporaryExpr *Materialize
2477 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2478 E = Materialize->GetTemporaryExpr();
2481 if (SubstNonTypeTemplateParmExpr *NTTP
2482 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2483 E = NTTP->getReplacement();
2490 Expr *Expr::IgnoreCasts() {
2493 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2494 E = P->getSubExpr();
2497 if (MaterializeTemporaryExpr *Materialize
2498 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2499 E = Materialize->GetTemporaryExpr();
2502 if (SubstNonTypeTemplateParmExpr *NTTP
2503 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2504 E = NTTP->getReplacement();
2511 /// IgnoreParenLValueCasts - Ignore parentheses and lvalue-to-rvalue
2512 /// casts. This is intended purely as a temporary workaround for code
2513 /// that hasn't yet been rewritten to do the right thing about those
2514 /// casts, and may disappear along with the last internal use.
2515 Expr *Expr::IgnoreParenLValueCasts() {
2518 E = E->IgnoreParens();
2519 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2520 if (P->getCastKind() == CK_LValueToRValue) {
2521 E = P->getSubExpr();
2524 } else if (MaterializeTemporaryExpr *Materialize
2525 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2526 E = Materialize->GetTemporaryExpr();
2528 } else if (SubstNonTypeTemplateParmExpr *NTTP
2529 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2530 E = NTTP->getReplacement();
2538 Expr *Expr::ignoreParenBaseCasts() {
2541 E = E->IgnoreParens();
2542 if (CastExpr *CE = dyn_cast<CastExpr>(E)) {
2543 if (CE->getCastKind() == CK_DerivedToBase ||
2544 CE->getCastKind() == CK_UncheckedDerivedToBase ||
2545 CE->getCastKind() == CK_NoOp) {
2546 E = CE->getSubExpr();
2555 Expr *Expr::IgnoreParenImpCasts() {
2558 E = E->IgnoreParens();
2559 if (ImplicitCastExpr *P = dyn_cast<ImplicitCastExpr>(E)) {
2560 E = P->getSubExpr();
2563 if (MaterializeTemporaryExpr *Materialize
2564 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2565 E = Materialize->GetTemporaryExpr();
2568 if (SubstNonTypeTemplateParmExpr *NTTP
2569 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2570 E = NTTP->getReplacement();
2577 Expr *Expr::IgnoreConversionOperator() {
2578 if (CXXMemberCallExpr *MCE = dyn_cast<CXXMemberCallExpr>(this)) {
2579 if (MCE->getMethodDecl() && isa<CXXConversionDecl>(MCE->getMethodDecl()))
2580 return MCE->getImplicitObjectArgument();
2585 /// IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the
2586 /// value (including ptr->int casts of the same size). Strip off any
2587 /// ParenExpr or CastExprs, returning their operand.
2588 Expr *Expr::IgnoreParenNoopCasts(ASTContext &Ctx) {
2591 E = E->IgnoreParens();
2593 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2594 // We ignore integer <-> casts that are of the same width, ptr<->ptr and
2595 // ptr<->int casts of the same width. We also ignore all identity casts.
2596 Expr *SE = P->getSubExpr();
2598 if (Ctx.hasSameUnqualifiedType(E->getType(), SE->getType())) {
2603 if ((E->getType()->isPointerType() ||
2604 E->getType()->isIntegralType(Ctx)) &&
2605 (SE->getType()->isPointerType() ||
2606 SE->getType()->isIntegralType(Ctx)) &&
2607 Ctx.getTypeSize(E->getType()) == Ctx.getTypeSize(SE->getType())) {
2613 if (SubstNonTypeTemplateParmExpr *NTTP
2614 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2615 E = NTTP->getReplacement();
2623 bool Expr::isDefaultArgument() const {
2624 const Expr *E = this;
2625 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2626 E = M->GetTemporaryExpr();
2628 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E))
2629 E = ICE->getSubExprAsWritten();
2631 return isa<CXXDefaultArgExpr>(E);
2634 /// \brief Skip over any no-op casts and any temporary-binding
2636 static const Expr *skipTemporaryBindingsNoOpCastsAndParens(const Expr *E) {
2637 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2638 E = M->GetTemporaryExpr();
2640 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2641 if (ICE->getCastKind() == CK_NoOp)
2642 E = ICE->getSubExpr();
2647 while (const CXXBindTemporaryExpr *BE = dyn_cast<CXXBindTemporaryExpr>(E))
2648 E = BE->getSubExpr();
2650 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2651 if (ICE->getCastKind() == CK_NoOp)
2652 E = ICE->getSubExpr();
2657 return E->IgnoreParens();
2660 /// isTemporaryObject - Determines if this expression produces a
2661 /// temporary of the given class type.
2662 bool Expr::isTemporaryObject(ASTContext &C, const CXXRecordDecl *TempTy) const {
2663 if (!C.hasSameUnqualifiedType(getType(), C.getTypeDeclType(TempTy)))
2666 const Expr *E = skipTemporaryBindingsNoOpCastsAndParens(this);
2668 // Temporaries are by definition pr-values of class type.
2669 if (!E->Classify(C).isPRValue()) {
2670 // In this context, property reference is a message call and is pr-value.
2671 if (!isa<ObjCPropertyRefExpr>(E))
2675 // Black-list a few cases which yield pr-values of class type that don't
2676 // refer to temporaries of that type:
2678 // - implicit derived-to-base conversions
2679 if (isa<ImplicitCastExpr>(E)) {
2680 switch (cast<ImplicitCastExpr>(E)->getCastKind()) {
2681 case CK_DerivedToBase:
2682 case CK_UncheckedDerivedToBase:
2689 // - member expressions (all)
2690 if (isa<MemberExpr>(E))
2693 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E))
2694 if (BO->isPtrMemOp())
2697 // - opaque values (all)
2698 if (isa<OpaqueValueExpr>(E))
2704 bool Expr::isImplicitCXXThis() const {
2705 const Expr *E = this;
2707 // Strip away parentheses and casts we don't care about.
2709 if (const ParenExpr *Paren = dyn_cast<ParenExpr>(E)) {
2710 E = Paren->getSubExpr();
2714 if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2715 if (ICE->getCastKind() == CK_NoOp ||
2716 ICE->getCastKind() == CK_LValueToRValue ||
2717 ICE->getCastKind() == CK_DerivedToBase ||
2718 ICE->getCastKind() == CK_UncheckedDerivedToBase) {
2719 E = ICE->getSubExpr();
2724 if (const UnaryOperator* UnOp = dyn_cast<UnaryOperator>(E)) {
2725 if (UnOp->getOpcode() == UO_Extension) {
2726 E = UnOp->getSubExpr();
2731 if (const MaterializeTemporaryExpr *M
2732 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2733 E = M->GetTemporaryExpr();
2740 if (const CXXThisExpr *This = dyn_cast<CXXThisExpr>(E))
2741 return This->isImplicit();
2746 /// hasAnyTypeDependentArguments - Determines if any of the expressions
2747 /// in Exprs is type-dependent.
2748 bool Expr::hasAnyTypeDependentArguments(ArrayRef<Expr *> Exprs) {
2749 for (unsigned I = 0; I < Exprs.size(); ++I)
2750 if (Exprs[I]->isTypeDependent())
2756 bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef,
2757 const Expr **Culprit) const {
2758 // This function is attempting whether an expression is an initializer
2759 // which can be evaluated at compile-time. It very closely parallels
2760 // ConstExprEmitter in CGExprConstant.cpp; if they don't match, it
2761 // will lead to unexpected results. Like ConstExprEmitter, it falls back
2762 // to isEvaluatable most of the time.
2764 // If we ever capture reference-binding directly in the AST, we can
2765 // kill the second parameter.
2769 if (EvaluateAsLValue(Result, Ctx) && !Result.HasSideEffects)
2776 switch (getStmtClass()) {
2778 case StringLiteralClass:
2779 case ObjCEncodeExprClass:
2781 case CXXTemporaryObjectExprClass:
2782 case CXXConstructExprClass: {
2783 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
2785 if (CE->getConstructor()->isTrivial() &&
2786 CE->getConstructor()->getParent()->hasTrivialDestructor()) {
2787 // Trivial default constructor
2788 if (!CE->getNumArgs()) return true;
2790 // Trivial copy constructor
2791 assert(CE->getNumArgs() == 1 && "trivial ctor with > 1 argument");
2792 return CE->getArg(0)->isConstantInitializer(Ctx, false, Culprit);
2797 case CompoundLiteralExprClass: {
2798 // This handles gcc's extension that allows global initializers like
2799 // "struct x {int x;} x = (struct x) {};".
2800 // FIXME: This accepts other cases it shouldn't!
2801 const Expr *Exp = cast<CompoundLiteralExpr>(this)->getInitializer();
2802 return Exp->isConstantInitializer(Ctx, false, Culprit);
2804 case DesignatedInitUpdateExprClass: {
2805 const DesignatedInitUpdateExpr *DIUE = cast<DesignatedInitUpdateExpr>(this);
2806 return DIUE->getBase()->isConstantInitializer(Ctx, false, Culprit) &&
2807 DIUE->getUpdater()->isConstantInitializer(Ctx, false, Culprit);
2809 case InitListExprClass: {
2810 const InitListExpr *ILE = cast<InitListExpr>(this);
2811 if (ILE->getType()->isArrayType()) {
2812 unsigned numInits = ILE->getNumInits();
2813 for (unsigned i = 0; i < numInits; i++) {
2814 if (!ILE->getInit(i)->isConstantInitializer(Ctx, false, Culprit))
2820 if (ILE->getType()->isRecordType()) {
2821 unsigned ElementNo = 0;
2822 RecordDecl *RD = ILE->getType()->getAs<RecordType>()->getDecl();
2823 for (const auto *Field : RD->fields()) {
2824 // If this is a union, skip all the fields that aren't being initialized.
2825 if (RD->isUnion() && ILE->getInitializedFieldInUnion() != Field)
2828 // Don't emit anonymous bitfields, they just affect layout.
2829 if (Field->isUnnamedBitfield())
2832 if (ElementNo < ILE->getNumInits()) {
2833 const Expr *Elt = ILE->getInit(ElementNo++);
2834 if (Field->isBitField()) {
2835 // Bitfields have to evaluate to an integer.
2836 llvm::APSInt ResultTmp;
2837 if (!Elt->EvaluateAsInt(ResultTmp, Ctx)) {
2843 bool RefType = Field->getType()->isReferenceType();
2844 if (!Elt->isConstantInitializer(Ctx, RefType, Culprit))
2854 case ImplicitValueInitExprClass:
2855 case NoInitExprClass:
2857 case ParenExprClass:
2858 return cast<ParenExpr>(this)->getSubExpr()
2859 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2860 case GenericSelectionExprClass:
2861 return cast<GenericSelectionExpr>(this)->getResultExpr()
2862 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2863 case ChooseExprClass:
2864 if (cast<ChooseExpr>(this)->isConditionDependent()) {
2869 return cast<ChooseExpr>(this)->getChosenSubExpr()
2870 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2871 case UnaryOperatorClass: {
2872 const UnaryOperator* Exp = cast<UnaryOperator>(this);
2873 if (Exp->getOpcode() == UO_Extension)
2874 return Exp->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
2877 case CXXFunctionalCastExprClass:
2878 case CXXStaticCastExprClass:
2879 case ImplicitCastExprClass:
2880 case CStyleCastExprClass:
2881 case ObjCBridgedCastExprClass:
2882 case CXXDynamicCastExprClass:
2883 case CXXReinterpretCastExprClass:
2884 case CXXConstCastExprClass: {
2885 const CastExpr *CE = cast<CastExpr>(this);
2887 // Handle misc casts we want to ignore.
2888 if (CE->getCastKind() == CK_NoOp ||
2889 CE->getCastKind() == CK_LValueToRValue ||
2890 CE->getCastKind() == CK_ToUnion ||
2891 CE->getCastKind() == CK_ConstructorConversion ||
2892 CE->getCastKind() == CK_NonAtomicToAtomic ||
2893 CE->getCastKind() == CK_AtomicToNonAtomic)
2894 return CE->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
2898 case MaterializeTemporaryExprClass:
2899 return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
2900 ->isConstantInitializer(Ctx, false, Culprit);
2902 case SubstNonTypeTemplateParmExprClass:
2903 return cast<SubstNonTypeTemplateParmExpr>(this)->getReplacement()
2904 ->isConstantInitializer(Ctx, false, Culprit);
2905 case CXXDefaultArgExprClass:
2906 return cast<CXXDefaultArgExpr>(this)->getExpr()
2907 ->isConstantInitializer(Ctx, false, Culprit);
2908 case CXXDefaultInitExprClass:
2909 return cast<CXXDefaultInitExpr>(this)->getExpr()
2910 ->isConstantInitializer(Ctx, false, Culprit);
2912 // Allow certain forms of UB in constant initializers: signed integer
2913 // overflow and floating-point division by zero. We'll give a warning on
2914 // these, but they're common enough that we have to accept them.
2915 if (isEvaluatable(Ctx, SE_AllowUndefinedBehavior))
2923 /// \brief Look for any side effects within a Stmt.
2924 class SideEffectFinder : public ConstEvaluatedExprVisitor<SideEffectFinder> {
2925 typedef ConstEvaluatedExprVisitor<SideEffectFinder> Inherited;
2926 const bool IncludePossibleEffects;
2927 bool HasSideEffects;
2930 explicit SideEffectFinder(const ASTContext &Context, bool IncludePossible)
2931 : Inherited(Context),
2932 IncludePossibleEffects(IncludePossible), HasSideEffects(false) { }
2934 bool hasSideEffects() const { return HasSideEffects; }
2936 void VisitExpr(const Expr *E) {
2937 if (!HasSideEffects &&
2938 E->HasSideEffects(Context, IncludePossibleEffects))
2939 HasSideEffects = true;
2944 bool Expr::HasSideEffects(const ASTContext &Ctx,
2945 bool IncludePossibleEffects) const {
2946 // In circumstances where we care about definite side effects instead of
2947 // potential side effects, we want to ignore expressions that are part of a
2948 // macro expansion as a potential side effect.
2949 if (!IncludePossibleEffects && getExprLoc().isMacroID())
2952 if (isInstantiationDependent())
2953 return IncludePossibleEffects;
2955 switch (getStmtClass()) {
2957 #define ABSTRACT_STMT(Type)
2958 #define STMT(Type, Base) case Type##Class:
2959 #define EXPR(Type, Base)
2960 #include "clang/AST/StmtNodes.inc"
2961 llvm_unreachable("unexpected Expr kind");
2963 case DependentScopeDeclRefExprClass:
2964 case CXXUnresolvedConstructExprClass:
2965 case CXXDependentScopeMemberExprClass:
2966 case UnresolvedLookupExprClass:
2967 case UnresolvedMemberExprClass:
2968 case PackExpansionExprClass:
2969 case SubstNonTypeTemplateParmPackExprClass:
2970 case FunctionParmPackExprClass:
2972 case CXXFoldExprClass:
2973 llvm_unreachable("shouldn't see dependent / unresolved nodes here");
2975 case DeclRefExprClass:
2976 case ObjCIvarRefExprClass:
2977 case PredefinedExprClass:
2978 case IntegerLiteralClass:
2979 case FloatingLiteralClass:
2980 case ImaginaryLiteralClass:
2981 case StringLiteralClass:
2982 case CharacterLiteralClass:
2983 case OffsetOfExprClass:
2984 case ImplicitValueInitExprClass:
2985 case UnaryExprOrTypeTraitExprClass:
2986 case AddrLabelExprClass:
2987 case GNUNullExprClass:
2988 case NoInitExprClass:
2989 case CXXBoolLiteralExprClass:
2990 case CXXNullPtrLiteralExprClass:
2991 case CXXThisExprClass:
2992 case CXXScalarValueInitExprClass:
2993 case TypeTraitExprClass:
2994 case ArrayTypeTraitExprClass:
2995 case ExpressionTraitExprClass:
2996 case CXXNoexceptExprClass:
2997 case SizeOfPackExprClass:
2998 case ObjCStringLiteralClass:
2999 case ObjCEncodeExprClass:
3000 case ObjCBoolLiteralExprClass:
3001 case CXXUuidofExprClass:
3002 case OpaqueValueExprClass:
3003 // These never have a side-effect.
3007 case CXXOperatorCallExprClass:
3008 case CXXMemberCallExprClass:
3009 case CUDAKernelCallExprClass:
3010 case UserDefinedLiteralClass: {
3011 // We don't know a call definitely has side effects, except for calls
3012 // to pure/const functions that definitely don't.
3013 // If the call itself is considered side-effect free, check the operands.
3014 const Decl *FD = cast<CallExpr>(this)->getCalleeDecl();
3015 bool IsPure = FD && (FD->hasAttr<ConstAttr>() || FD->hasAttr<PureAttr>());
3016 if (IsPure || !IncludePossibleEffects)
3021 case BlockExprClass:
3022 case CXXBindTemporaryExprClass:
3023 if (!IncludePossibleEffects)
3027 case MSPropertyRefExprClass:
3028 case MSPropertySubscriptExprClass:
3029 case CompoundAssignOperatorClass:
3030 case VAArgExprClass:
3031 case AtomicExprClass:
3032 case CXXThrowExprClass:
3033 case CXXNewExprClass:
3034 case CXXDeleteExprClass:
3035 case ExprWithCleanupsClass:
3036 case CoawaitExprClass:
3037 case CoyieldExprClass:
3038 // These always have a side-effect.
3041 case StmtExprClass: {
3042 // StmtExprs have a side-effect if any substatement does.
3043 SideEffectFinder Finder(Ctx, IncludePossibleEffects);
3044 Finder.Visit(cast<StmtExpr>(this)->getSubStmt());
3045 return Finder.hasSideEffects();
3048 case ParenExprClass:
3049 case ArraySubscriptExprClass:
3050 case OMPArraySectionExprClass:
3051 case MemberExprClass:
3052 case ConditionalOperatorClass:
3053 case BinaryConditionalOperatorClass:
3054 case CompoundLiteralExprClass:
3055 case ExtVectorElementExprClass:
3056 case DesignatedInitExprClass:
3057 case DesignatedInitUpdateExprClass:
3058 case ParenListExprClass:
3059 case CXXPseudoDestructorExprClass:
3060 case CXXStdInitializerListExprClass:
3061 case SubstNonTypeTemplateParmExprClass:
3062 case MaterializeTemporaryExprClass:
3063 case ShuffleVectorExprClass:
3064 case ConvertVectorExprClass:
3065 case AsTypeExprClass:
3066 // These have a side-effect if any subexpression does.
3069 case UnaryOperatorClass:
3070 if (cast<UnaryOperator>(this)->isIncrementDecrementOp())
3074 case BinaryOperatorClass:
3075 if (cast<BinaryOperator>(this)->isAssignmentOp())
3079 case InitListExprClass:
3080 // FIXME: The children for an InitListExpr doesn't include the array filler.
3081 if (const Expr *E = cast<InitListExpr>(this)->getArrayFiller())
3082 if (E->HasSideEffects(Ctx, IncludePossibleEffects))
3086 case GenericSelectionExprClass:
3087 return cast<GenericSelectionExpr>(this)->getResultExpr()->
3088 HasSideEffects(Ctx, IncludePossibleEffects);
3090 case ChooseExprClass:
3091 return cast<ChooseExpr>(this)->getChosenSubExpr()->HasSideEffects(
3092 Ctx, IncludePossibleEffects);
3094 case CXXDefaultArgExprClass:
3095 return cast<CXXDefaultArgExpr>(this)->getExpr()->HasSideEffects(
3096 Ctx, IncludePossibleEffects);
3098 case CXXDefaultInitExprClass: {
3099 const FieldDecl *FD = cast<CXXDefaultInitExpr>(this)->getField();
3100 if (const Expr *E = FD->getInClassInitializer())
3101 return E->HasSideEffects(Ctx, IncludePossibleEffects);
3102 // If we've not yet parsed the initializer, assume it has side-effects.
3106 case CXXDynamicCastExprClass: {
3107 // A dynamic_cast expression has side-effects if it can throw.
3108 const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(this);
3109 if (DCE->getTypeAsWritten()->isReferenceType() &&
3110 DCE->getCastKind() == CK_Dynamic)
3113 case ImplicitCastExprClass:
3114 case CStyleCastExprClass:
3115 case CXXStaticCastExprClass:
3116 case CXXReinterpretCastExprClass:
3117 case CXXConstCastExprClass:
3118 case CXXFunctionalCastExprClass: {
3119 // While volatile reads are side-effecting in both C and C++, we treat them
3120 // as having possible (not definite) side-effects. This allows idiomatic
3121 // code to behave without warning, such as sizeof(*v) for a volatile-
3122 // qualified pointer.
3123 if (!IncludePossibleEffects)
3126 const CastExpr *CE = cast<CastExpr>(this);
3127 if (CE->getCastKind() == CK_LValueToRValue &&
3128 CE->getSubExpr()->getType().isVolatileQualified())
3133 case CXXTypeidExprClass:
3134 // typeid might throw if its subexpression is potentially-evaluated, so has
3135 // side-effects in that case whether or not its subexpression does.
3136 return cast<CXXTypeidExpr>(this)->isPotentiallyEvaluated();
3138 case CXXConstructExprClass:
3139 case CXXTemporaryObjectExprClass: {
3140 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
3141 if (!CE->getConstructor()->isTrivial() && IncludePossibleEffects)
3143 // A trivial constructor does not add any side-effects of its own. Just look
3144 // at its arguments.
3148 case LambdaExprClass: {
3149 const LambdaExpr *LE = cast<LambdaExpr>(this);
3150 for (LambdaExpr::capture_iterator I = LE->capture_begin(),
3151 E = LE->capture_end(); I != E; ++I)
3152 if (I->getCaptureKind() == LCK_ByCopy)
3153 // FIXME: Only has a side-effect if the variable is volatile or if
3154 // the copy would invoke a non-trivial copy constructor.
3159 case PseudoObjectExprClass: {
3160 // Only look for side-effects in the semantic form, and look past
3161 // OpaqueValueExpr bindings in that form.
3162 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
3163 for (PseudoObjectExpr::const_semantics_iterator I = PO->semantics_begin(),
3164 E = PO->semantics_end();
3166 const Expr *Subexpr = *I;
3167 if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(Subexpr))
3168 Subexpr = OVE->getSourceExpr();
3169 if (Subexpr->HasSideEffects(Ctx, IncludePossibleEffects))
3175 case ObjCBoxedExprClass:
3176 case ObjCArrayLiteralClass:
3177 case ObjCDictionaryLiteralClass:
3178 case ObjCSelectorExprClass:
3179 case ObjCProtocolExprClass:
3180 case ObjCIsaExprClass:
3181 case ObjCIndirectCopyRestoreExprClass:
3182 case ObjCSubscriptRefExprClass:
3183 case ObjCBridgedCastExprClass:
3184 case ObjCMessageExprClass:
3185 case ObjCPropertyRefExprClass:
3186 // FIXME: Classify these cases better.
3187 if (IncludePossibleEffects)
3192 // Recurse to children.
3193 for (const Stmt *SubStmt : children())
3195 cast<Expr>(SubStmt)->HasSideEffects(Ctx, IncludePossibleEffects))
3202 /// \brief Look for a call to a non-trivial function within an expression.
3203 class NonTrivialCallFinder : public ConstEvaluatedExprVisitor<NonTrivialCallFinder>
3205 typedef ConstEvaluatedExprVisitor<NonTrivialCallFinder> Inherited;
3210 explicit NonTrivialCallFinder(const ASTContext &Context)
3211 : Inherited(Context), NonTrivial(false) { }
3213 bool hasNonTrivialCall() const { return NonTrivial; }
3215 void VisitCallExpr(const CallExpr *E) {
3216 if (const CXXMethodDecl *Method
3217 = dyn_cast_or_null<const CXXMethodDecl>(E->getCalleeDecl())) {
3218 if (Method->isTrivial()) {
3219 // Recurse to children of the call.
3220 Inherited::VisitStmt(E);
3228 void VisitCXXConstructExpr(const CXXConstructExpr *E) {
3229 if (E->getConstructor()->isTrivial()) {
3230 // Recurse to children of the call.
3231 Inherited::VisitStmt(E);
3238 void VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *E) {
3239 if (E->getTemporary()->getDestructor()->isTrivial()) {
3240 Inherited::VisitStmt(E);
3249 bool Expr::hasNonTrivialCall(const ASTContext &Ctx) const {
3250 NonTrivialCallFinder Finder(Ctx);
3252 return Finder.hasNonTrivialCall();
3255 /// isNullPointerConstant - C99 6.3.2.3p3 - Return whether this is a null
3256 /// pointer constant or not, as well as the specific kind of constant detected.
3257 /// Null pointer constants can be integer constant expressions with the
3258 /// value zero, casts of zero to void*, nullptr (C++0X), or __null
3259 /// (a GNU extension).
3260 Expr::NullPointerConstantKind
3261 Expr::isNullPointerConstant(ASTContext &Ctx,
3262 NullPointerConstantValueDependence NPC) const {
3263 if (isValueDependent() &&
3264 (!Ctx.getLangOpts().CPlusPlus11 || Ctx.getLangOpts().MSVCCompat)) {
3266 case NPC_NeverValueDependent:
3267 llvm_unreachable("Unexpected value dependent expression!");
3268 case NPC_ValueDependentIsNull:
3269 if (isTypeDependent() || getType()->isIntegralType(Ctx))
3270 return NPCK_ZeroExpression;
3272 return NPCK_NotNull;
3274 case NPC_ValueDependentIsNotNull:
3275 return NPCK_NotNull;
3279 // Strip off a cast to void*, if it exists. Except in C++.
3280 if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) {
3281 if (!Ctx.getLangOpts().CPlusPlus) {
3282 // Check that it is a cast to void*.
3283 if (const PointerType *PT = CE->getType()->getAs<PointerType>()) {
3284 QualType Pointee = PT->getPointeeType();
3285 Qualifiers Q = Pointee.getQualifiers();
3286 // In OpenCL v2.0 generic address space acts as a placeholder
3287 // and should be ignored.
3288 bool IsASValid = true;
3289 if (Ctx.getLangOpts().OpenCLVersion >= 200) {
3290 if (Pointee.getAddressSpace() == LangAS::opencl_generic)
3291 Q.removeAddressSpace();
3296 if (IsASValid && !Q.hasQualifiers() &&
3297 Pointee->isVoidType() && // to void*
3298 CE->getSubExpr()->getType()->isIntegerType()) // from int.
3299 return CE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3302 } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) {
3303 // Ignore the ImplicitCastExpr type entirely.
3304 return ICE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3305 } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) {
3306 // Accept ((void*)0) as a null pointer constant, as many other
3307 // implementations do.
3308 return PE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3309 } else if (const GenericSelectionExpr *GE =
3310 dyn_cast<GenericSelectionExpr>(this)) {
3311 if (GE->isResultDependent())
3312 return NPCK_NotNull;
3313 return GE->getResultExpr()->isNullPointerConstant(Ctx, NPC);
3314 } else if (const ChooseExpr *CE = dyn_cast<ChooseExpr>(this)) {
3315 if (CE->isConditionDependent())
3316 return NPCK_NotNull;
3317 return CE->getChosenSubExpr()->isNullPointerConstant(Ctx, NPC);
3318 } else if (const CXXDefaultArgExpr *DefaultArg
3319 = dyn_cast<CXXDefaultArgExpr>(this)) {
3320 // See through default argument expressions.
3321 return DefaultArg->getExpr()->isNullPointerConstant(Ctx, NPC);
3322 } else if (const CXXDefaultInitExpr *DefaultInit
3323 = dyn_cast<CXXDefaultInitExpr>(this)) {
3324 // See through default initializer expressions.
3325 return DefaultInit->getExpr()->isNullPointerConstant(Ctx, NPC);
3326 } else if (isa<GNUNullExpr>(this)) {
3327 // The GNU __null extension is always a null pointer constant.
3328 return NPCK_GNUNull;
3329 } else if (const MaterializeTemporaryExpr *M
3330 = dyn_cast<MaterializeTemporaryExpr>(this)) {
3331 return M->GetTemporaryExpr()->isNullPointerConstant(Ctx, NPC);
3332 } else if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(this)) {
3333 if (const Expr *Source = OVE->getSourceExpr())
3334 return Source->isNullPointerConstant(Ctx, NPC);
3337 // C++11 nullptr_t is always a null pointer constant.
3338 if (getType()->isNullPtrType())
3339 return NPCK_CXX11_nullptr;
3341 if (const RecordType *UT = getType()->getAsUnionType())
3342 if (!Ctx.getLangOpts().CPlusPlus11 &&
3343 UT && UT->getDecl()->hasAttr<TransparentUnionAttr>())
3344 if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(this)){
3345 const Expr *InitExpr = CLE->getInitializer();
3346 if (const InitListExpr *ILE = dyn_cast<InitListExpr>(InitExpr))
3347 return ILE->getInit(0)->isNullPointerConstant(Ctx, NPC);
3349 // This expression must be an integer type.
3350 if (!getType()->isIntegerType() ||
3351 (Ctx.getLangOpts().CPlusPlus && getType()->isEnumeralType()))
3352 return NPCK_NotNull;
3354 if (Ctx.getLangOpts().CPlusPlus11) {
3355 // C++11 [conv.ptr]p1: A null pointer constant is an integer literal with
3356 // value zero or a prvalue of type std::nullptr_t.
3357 // Microsoft mode permits C++98 rules reflecting MSVC behavior.
3358 const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(this);
3359 if (Lit && !Lit->getValue())
3360 return NPCK_ZeroLiteral;
3361 else if (!Ctx.getLangOpts().MSVCCompat || !isCXX98IntegralConstantExpr(Ctx))
3362 return NPCK_NotNull;
3364 // If we have an integer constant expression, we need to *evaluate* it and
3365 // test for the value 0.
3366 if (!isIntegerConstantExpr(Ctx))
3367 return NPCK_NotNull;
3370 if (EvaluateKnownConstInt(Ctx) != 0)
3371 return NPCK_NotNull;
3373 if (isa<IntegerLiteral>(this))
3374 return NPCK_ZeroLiteral;
3375 return NPCK_ZeroExpression;
3378 /// \brief If this expression is an l-value for an Objective C
3379 /// property, find the underlying property reference expression.
3380 const ObjCPropertyRefExpr *Expr::getObjCProperty() const {
3381 const Expr *E = this;
3383 assert((E->getValueKind() == VK_LValue &&
3384 E->getObjectKind() == OK_ObjCProperty) &&
3385 "expression is not a property reference");
3386 E = E->IgnoreParenCasts();
3387 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
3388 if (BO->getOpcode() == BO_Comma) {
3397 return cast<ObjCPropertyRefExpr>(E);
3400 bool Expr::isObjCSelfExpr() const {
3401 const Expr *E = IgnoreParenImpCasts();
3403 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E);
3407 const ImplicitParamDecl *Param = dyn_cast<ImplicitParamDecl>(DRE->getDecl());
3411 const ObjCMethodDecl *M = dyn_cast<ObjCMethodDecl>(Param->getDeclContext());
3415 return M->getSelfDecl() == Param;
3418 FieldDecl *Expr::getSourceBitField() {
3419 Expr *E = this->IgnoreParens();
3421 while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3422 if (ICE->getCastKind() == CK_LValueToRValue ||
3423 (ICE->getValueKind() != VK_RValue && ICE->getCastKind() == CK_NoOp))
3424 E = ICE->getSubExpr()->IgnoreParens();
3429 if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E))
3430 if (FieldDecl *Field = dyn_cast<FieldDecl>(MemRef->getMemberDecl()))
3431 if (Field->isBitField())
3434 if (ObjCIvarRefExpr *IvarRef = dyn_cast<ObjCIvarRefExpr>(E))
3435 if (FieldDecl *Ivar = dyn_cast<FieldDecl>(IvarRef->getDecl()))
3436 if (Ivar->isBitField())
3439 if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E))
3440 if (FieldDecl *Field = dyn_cast<FieldDecl>(DeclRef->getDecl()))
3441 if (Field->isBitField())
3444 if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(E)) {
3445 if (BinOp->isAssignmentOp() && BinOp->getLHS())
3446 return BinOp->getLHS()->getSourceBitField();
3448 if (BinOp->getOpcode() == BO_Comma && BinOp->getRHS())
3449 return BinOp->getRHS()->getSourceBitField();
3452 if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(E))
3453 if (UnOp->isPrefix() && UnOp->isIncrementDecrementOp())
3454 return UnOp->getSubExpr()->getSourceBitField();
3459 bool Expr::refersToVectorElement() const {
3460 const Expr *E = this->IgnoreParens();
3462 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3463 if (ICE->getValueKind() != VK_RValue &&
3464 ICE->getCastKind() == CK_NoOp)
3465 E = ICE->getSubExpr()->IgnoreParens();
3470 if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E))
3471 return ASE->getBase()->getType()->isVectorType();
3473 if (isa<ExtVectorElementExpr>(E))
3479 bool Expr::refersToGlobalRegisterVar() const {
3480 const Expr *E = this->IgnoreParenImpCasts();
3482 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
3483 if (const auto *VD = dyn_cast<VarDecl>(DRE->getDecl()))
3484 if (VD->getStorageClass() == SC_Register &&
3485 VD->hasAttr<AsmLabelAttr>() && !VD->isLocalVarDecl())
3491 /// isArrow - Return true if the base expression is a pointer to vector,
3492 /// return false if the base expression is a vector.
3493 bool ExtVectorElementExpr::isArrow() const {
3494 return getBase()->getType()->isPointerType();
3497 unsigned ExtVectorElementExpr::getNumElements() const {
3498 if (const VectorType *VT = getType()->getAs<VectorType>())
3499 return VT->getNumElements();
3503 /// containsDuplicateElements - Return true if any element access is repeated.
3504 bool ExtVectorElementExpr::containsDuplicateElements() const {
3505 // FIXME: Refactor this code to an accessor on the AST node which returns the
3506 // "type" of component access, and share with code below and in Sema.
3507 StringRef Comp = Accessor->getName();
3509 // Halving swizzles do not contain duplicate elements.
3510 if (Comp == "hi" || Comp == "lo" || Comp == "even" || Comp == "odd")
3513 // Advance past s-char prefix on hex swizzles.
3514 if (Comp[0] == 's' || Comp[0] == 'S')
3515 Comp = Comp.substr(1);
3517 for (unsigned i = 0, e = Comp.size(); i != e; ++i)
3518 if (Comp.substr(i + 1).find(Comp[i]) != StringRef::npos)
3524 /// getEncodedElementAccess - We encode the fields as a llvm ConstantArray.
3525 void ExtVectorElementExpr::getEncodedElementAccess(
3526 SmallVectorImpl<uint32_t> &Elts) const {
3527 StringRef Comp = Accessor->getName();
3528 if (Comp[0] == 's' || Comp[0] == 'S')
3529 Comp = Comp.substr(1);
3531 bool isHi = Comp == "hi";
3532 bool isLo = Comp == "lo";
3533 bool isEven = Comp == "even";
3534 bool isOdd = Comp == "odd";
3536 for (unsigned i = 0, e = getNumElements(); i != e; ++i) {
3548 Index = ExtVectorType::getAccessorIdx(Comp[i]);
3550 Elts.push_back(Index);
3554 ShuffleVectorExpr::ShuffleVectorExpr(const ASTContext &C, ArrayRef<Expr*> args,
3555 QualType Type, SourceLocation BLoc,
3557 : Expr(ShuffleVectorExprClass, Type, VK_RValue, OK_Ordinary,
3558 Type->isDependentType(), Type->isDependentType(),
3559 Type->isInstantiationDependentType(),
3560 Type->containsUnexpandedParameterPack()),
3561 BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(args.size())
3563 SubExprs = new (C) Stmt*[args.size()];
3564 for (unsigned i = 0; i != args.size(); i++) {
3565 if (args[i]->isTypeDependent())
3566 ExprBits.TypeDependent = true;
3567 if (args[i]->isValueDependent())
3568 ExprBits.ValueDependent = true;
3569 if (args[i]->isInstantiationDependent())
3570 ExprBits.InstantiationDependent = true;
3571 if (args[i]->containsUnexpandedParameterPack())
3572 ExprBits.ContainsUnexpandedParameterPack = true;
3574 SubExprs[i] = args[i];
3578 void ShuffleVectorExpr::setExprs(const ASTContext &C, ArrayRef<Expr *> Exprs) {
3579 if (SubExprs) C.Deallocate(SubExprs);
3581 this->NumExprs = Exprs.size();
3582 SubExprs = new (C) Stmt*[NumExprs];
3583 memcpy(SubExprs, Exprs.data(), sizeof(Expr *) * Exprs.size());
3586 GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
3587 SourceLocation GenericLoc, Expr *ControllingExpr,
3588 ArrayRef<TypeSourceInfo*> AssocTypes,
3589 ArrayRef<Expr*> AssocExprs,
3590 SourceLocation DefaultLoc,
3591 SourceLocation RParenLoc,
3592 bool ContainsUnexpandedParameterPack,
3593 unsigned ResultIndex)
3594 : Expr(GenericSelectionExprClass,
3595 AssocExprs[ResultIndex]->getType(),
3596 AssocExprs[ResultIndex]->getValueKind(),
3597 AssocExprs[ResultIndex]->getObjectKind(),
3598 AssocExprs[ResultIndex]->isTypeDependent(),
3599 AssocExprs[ResultIndex]->isValueDependent(),
3600 AssocExprs[ResultIndex]->isInstantiationDependent(),
3601 ContainsUnexpandedParameterPack),
3602 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3603 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3604 NumAssocs(AssocExprs.size()), ResultIndex(ResultIndex),
3605 GenericLoc(GenericLoc), DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3606 SubExprs[CONTROLLING] = ControllingExpr;
3607 assert(AssocTypes.size() == AssocExprs.size());
3608 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3609 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3612 GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
3613 SourceLocation GenericLoc, Expr *ControllingExpr,
3614 ArrayRef<TypeSourceInfo*> AssocTypes,
3615 ArrayRef<Expr*> AssocExprs,
3616 SourceLocation DefaultLoc,
3617 SourceLocation RParenLoc,
3618 bool ContainsUnexpandedParameterPack)
3619 : Expr(GenericSelectionExprClass,
3620 Context.DependentTy,
3623 /*isTypeDependent=*/true,
3624 /*isValueDependent=*/true,
3625 /*isInstantiationDependent=*/true,
3626 ContainsUnexpandedParameterPack),
3627 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3628 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3629 NumAssocs(AssocExprs.size()), ResultIndex(-1U), GenericLoc(GenericLoc),
3630 DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3631 SubExprs[CONTROLLING] = ControllingExpr;
3632 assert(AssocTypes.size() == AssocExprs.size());
3633 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3634 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3637 //===----------------------------------------------------------------------===//
3638 // DesignatedInitExpr
3639 //===----------------------------------------------------------------------===//
3641 IdentifierInfo *DesignatedInitExpr::Designator::getFieldName() const {
3642 assert(Kind == FieldDesignator && "Only valid on a field designator");
3643 if (Field.NameOrField & 0x01)
3644 return reinterpret_cast<IdentifierInfo *>(Field.NameOrField&~0x01);
3646 return getField()->getIdentifier();
3649 DesignatedInitExpr::DesignatedInitExpr(const ASTContext &C, QualType Ty,
3650 unsigned NumDesignators,
3651 const Designator *Designators,
3652 SourceLocation EqualOrColonLoc,
3654 ArrayRef<Expr*> IndexExprs,
3656 : Expr(DesignatedInitExprClass, Ty,
3657 Init->getValueKind(), Init->getObjectKind(),
3658 Init->isTypeDependent(), Init->isValueDependent(),
3659 Init->isInstantiationDependent(),
3660 Init->containsUnexpandedParameterPack()),
3661 EqualOrColonLoc(EqualOrColonLoc), GNUSyntax(GNUSyntax),
3662 NumDesignators(NumDesignators), NumSubExprs(IndexExprs.size() + 1) {
3663 this->Designators = new (C) Designator[NumDesignators];
3665 // Record the initializer itself.
3666 child_iterator Child = child_begin();
3669 // Copy the designators and their subexpressions, computing
3670 // value-dependence along the way.
3671 unsigned IndexIdx = 0;
3672 for (unsigned I = 0; I != NumDesignators; ++I) {
3673 this->Designators[I] = Designators[I];
3675 if (this->Designators[I].isArrayDesignator()) {
3676 // Compute type- and value-dependence.
3677 Expr *Index = IndexExprs[IndexIdx];
3678 if (Index->isTypeDependent() || Index->isValueDependent())
3679 ExprBits.TypeDependent = ExprBits.ValueDependent = true;
3680 if (Index->isInstantiationDependent())
3681 ExprBits.InstantiationDependent = true;
3682 // Propagate unexpanded parameter packs.
3683 if (Index->containsUnexpandedParameterPack())
3684 ExprBits.ContainsUnexpandedParameterPack = true;
3686 // Copy the index expressions into permanent storage.
3687 *Child++ = IndexExprs[IndexIdx++];
3688 } else if (this->Designators[I].isArrayRangeDesignator()) {
3689 // Compute type- and value-dependence.
3690 Expr *Start = IndexExprs[IndexIdx];
3691 Expr *End = IndexExprs[IndexIdx + 1];
3692 if (Start->isTypeDependent() || Start->isValueDependent() ||
3693 End->isTypeDependent() || End->isValueDependent()) {
3694 ExprBits.TypeDependent = ExprBits.ValueDependent = true;
3695 ExprBits.InstantiationDependent = true;
3696 } else if (Start->isInstantiationDependent() ||
3697 End->isInstantiationDependent()) {
3698 ExprBits.InstantiationDependent = true;
3701 // Propagate unexpanded parameter packs.
3702 if (Start->containsUnexpandedParameterPack() ||
3703 End->containsUnexpandedParameterPack())
3704 ExprBits.ContainsUnexpandedParameterPack = true;
3706 // Copy the start/end expressions into permanent storage.
3707 *Child++ = IndexExprs[IndexIdx++];
3708 *Child++ = IndexExprs[IndexIdx++];
3712 assert(IndexIdx == IndexExprs.size() && "Wrong number of index expressions");
3715 DesignatedInitExpr *
3716 DesignatedInitExpr::Create(const ASTContext &C, Designator *Designators,
3717 unsigned NumDesignators,
3718 ArrayRef<Expr*> IndexExprs,
3719 SourceLocation ColonOrEqualLoc,
3720 bool UsesColonSyntax, Expr *Init) {
3721 void *Mem = C.Allocate(sizeof(DesignatedInitExpr) +
3722 sizeof(Stmt *) * (IndexExprs.size() + 1),
3723 llvm::alignOf<DesignatedInitExpr>());
3724 return new (Mem) DesignatedInitExpr(C, C.VoidTy, NumDesignators, Designators,
3725 ColonOrEqualLoc, UsesColonSyntax,
3729 DesignatedInitExpr *DesignatedInitExpr::CreateEmpty(const ASTContext &C,
3730 unsigned NumIndexExprs) {
3731 void *Mem = C.Allocate(sizeof(DesignatedInitExpr) +
3732 sizeof(Stmt *) * (NumIndexExprs + 1), 8);
3733 return new (Mem) DesignatedInitExpr(NumIndexExprs + 1);
3736 void DesignatedInitExpr::setDesignators(const ASTContext &C,
3737 const Designator *Desigs,
3738 unsigned NumDesigs) {
3739 Designators = new (C) Designator[NumDesigs];
3740 NumDesignators = NumDesigs;
3741 for (unsigned I = 0; I != NumDesigs; ++I)
3742 Designators[I] = Desigs[I];
3745 SourceRange DesignatedInitExpr::getDesignatorsSourceRange() const {
3746 DesignatedInitExpr *DIE = const_cast<DesignatedInitExpr*>(this);
3748 return DIE->getDesignator(0)->getSourceRange();
3749 return SourceRange(DIE->getDesignator(0)->getLocStart(),
3750 DIE->getDesignator(size()-1)->getLocEnd());
3753 SourceLocation DesignatedInitExpr::getLocStart() const {
3754 SourceLocation StartLoc;
3756 *const_cast<DesignatedInitExpr*>(this)->designators_begin();
3757 if (First.isFieldDesignator()) {
3759 StartLoc = SourceLocation::getFromRawEncoding(First.Field.FieldLoc);
3761 StartLoc = SourceLocation::getFromRawEncoding(First.Field.DotLoc);
3764 SourceLocation::getFromRawEncoding(First.ArrayOrRange.LBracketLoc);
3768 SourceLocation DesignatedInitExpr::getLocEnd() const {
3769 return getInit()->getLocEnd();
3772 Expr *DesignatedInitExpr::getArrayIndex(const Designator& D) const {
3773 assert(D.Kind == Designator::ArrayDesignator && "Requires array designator");
3774 Stmt *const *SubExprs = reinterpret_cast<Stmt *const *>(this + 1);
3775 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 1));
3778 Expr *DesignatedInitExpr::getArrayRangeStart(const Designator &D) const {
3779 assert(D.Kind == Designator::ArrayRangeDesignator &&
3780 "Requires array range designator");
3781 Stmt *const *SubExprs = reinterpret_cast<Stmt *const *>(this + 1);
3782 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 1));
3785 Expr *DesignatedInitExpr::getArrayRangeEnd(const Designator &D) const {
3786 assert(D.Kind == Designator::ArrayRangeDesignator &&
3787 "Requires array range designator");
3788 Stmt *const *SubExprs = reinterpret_cast<Stmt *const *>(this + 1);
3789 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 2));
3792 /// \brief Replaces the designator at index @p Idx with the series
3793 /// of designators in [First, Last).
3794 void DesignatedInitExpr::ExpandDesignator(const ASTContext &C, unsigned Idx,
3795 const Designator *First,
3796 const Designator *Last) {
3797 unsigned NumNewDesignators = Last - First;
3798 if (NumNewDesignators == 0) {
3799 std::copy_backward(Designators + Idx + 1,
3800 Designators + NumDesignators,
3802 --NumNewDesignators;
3804 } else if (NumNewDesignators == 1) {
3805 Designators[Idx] = *First;
3809 Designator *NewDesignators
3810 = new (C) Designator[NumDesignators - 1 + NumNewDesignators];
3811 std::copy(Designators, Designators + Idx, NewDesignators);
3812 std::copy(First, Last, NewDesignators + Idx);
3813 std::copy(Designators + Idx + 1, Designators + NumDesignators,
3814 NewDesignators + Idx + NumNewDesignators);
3815 Designators = NewDesignators;
3816 NumDesignators = NumDesignators - 1 + NumNewDesignators;
3819 DesignatedInitUpdateExpr::DesignatedInitUpdateExpr(const ASTContext &C,
3820 SourceLocation lBraceLoc, Expr *baseExpr, SourceLocation rBraceLoc)
3821 : Expr(DesignatedInitUpdateExprClass, baseExpr->getType(), VK_RValue,
3822 OK_Ordinary, false, false, false, false) {
3823 BaseAndUpdaterExprs[0] = baseExpr;
3825 InitListExpr *ILE = new (C) InitListExpr(C, lBraceLoc, None, rBraceLoc);
3826 ILE->setType(baseExpr->getType());
3827 BaseAndUpdaterExprs[1] = ILE;
3830 SourceLocation DesignatedInitUpdateExpr::getLocStart() const {
3831 return getBase()->getLocStart();
3834 SourceLocation DesignatedInitUpdateExpr::getLocEnd() const {
3835 return getBase()->getLocEnd();
3838 ParenListExpr::ParenListExpr(const ASTContext& C, SourceLocation lparenloc,
3839 ArrayRef<Expr*> exprs,
3840 SourceLocation rparenloc)
3841 : Expr(ParenListExprClass, QualType(), VK_RValue, OK_Ordinary,
3842 false, false, false, false),
3843 NumExprs(exprs.size()), LParenLoc(lparenloc), RParenLoc(rparenloc) {
3844 Exprs = new (C) Stmt*[exprs.size()];
3845 for (unsigned i = 0; i != exprs.size(); ++i) {
3846 if (exprs[i]->isTypeDependent())
3847 ExprBits.TypeDependent = true;
3848 if (exprs[i]->isValueDependent())
3849 ExprBits.ValueDependent = true;
3850 if (exprs[i]->isInstantiationDependent())
3851 ExprBits.InstantiationDependent = true;
3852 if (exprs[i]->containsUnexpandedParameterPack())
3853 ExprBits.ContainsUnexpandedParameterPack = true;
3855 Exprs[i] = exprs[i];
3859 const OpaqueValueExpr *OpaqueValueExpr::findInCopyConstruct(const Expr *e) {
3860 if (const ExprWithCleanups *ewc = dyn_cast<ExprWithCleanups>(e))
3861 e = ewc->getSubExpr();
3862 if (const MaterializeTemporaryExpr *m = dyn_cast<MaterializeTemporaryExpr>(e))
3863 e = m->GetTemporaryExpr();
3864 e = cast<CXXConstructExpr>(e)->getArg(0);
3865 while (const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(e))
3866 e = ice->getSubExpr();
3867 return cast<OpaqueValueExpr>(e);
3870 PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &Context,
3872 unsigned numSemanticExprs) {
3873 void *buffer = Context.Allocate(sizeof(PseudoObjectExpr) +
3874 (1 + numSemanticExprs) * sizeof(Expr*),
3875 llvm::alignOf<PseudoObjectExpr>());
3876 return new(buffer) PseudoObjectExpr(sh, numSemanticExprs);
3879 PseudoObjectExpr::PseudoObjectExpr(EmptyShell shell, unsigned numSemanticExprs)
3880 : Expr(PseudoObjectExprClass, shell) {
3881 PseudoObjectExprBits.NumSubExprs = numSemanticExprs + 1;
3884 PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &C, Expr *syntax,
3885 ArrayRef<Expr*> semantics,
3886 unsigned resultIndex) {
3887 assert(syntax && "no syntactic expression!");
3888 assert(semantics.size() && "no semantic expressions!");
3892 if (resultIndex == NoResult) {
3896 assert(resultIndex < semantics.size());
3897 type = semantics[resultIndex]->getType();
3898 VK = semantics[resultIndex]->getValueKind();
3899 assert(semantics[resultIndex]->getObjectKind() == OK_Ordinary);
3902 void *buffer = C.Allocate(sizeof(PseudoObjectExpr) +
3903 (1 + semantics.size()) * sizeof(Expr*),
3904 llvm::alignOf<PseudoObjectExpr>());
3905 return new(buffer) PseudoObjectExpr(type, VK, syntax, semantics,
3909 PseudoObjectExpr::PseudoObjectExpr(QualType type, ExprValueKind VK,
3910 Expr *syntax, ArrayRef<Expr*> semantics,
3911 unsigned resultIndex)
3912 : Expr(PseudoObjectExprClass, type, VK, OK_Ordinary,
3913 /*filled in at end of ctor*/ false, false, false, false) {
3914 PseudoObjectExprBits.NumSubExprs = semantics.size() + 1;
3915 PseudoObjectExprBits.ResultIndex = resultIndex + 1;
3917 for (unsigned i = 0, e = semantics.size() + 1; i != e; ++i) {
3918 Expr *E = (i == 0 ? syntax : semantics[i-1]);
3919 getSubExprsBuffer()[i] = E;
3921 if (E->isTypeDependent())
3922 ExprBits.TypeDependent = true;
3923 if (E->isValueDependent())
3924 ExprBits.ValueDependent = true;
3925 if (E->isInstantiationDependent())
3926 ExprBits.InstantiationDependent = true;
3927 if (E->containsUnexpandedParameterPack())
3928 ExprBits.ContainsUnexpandedParameterPack = true;
3930 if (isa<OpaqueValueExpr>(E))
3931 assert(cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr &&
3932 "opaque-value semantic expressions for pseudo-object "
3933 "operations must have sources");
3937 //===----------------------------------------------------------------------===//
3938 // Child Iterators for iterating over subexpressions/substatements
3939 //===----------------------------------------------------------------------===//
3941 // UnaryExprOrTypeTraitExpr
3942 Stmt::child_range UnaryExprOrTypeTraitExpr::children() {
3943 // If this is of a type and the type is a VLA type (and not a typedef), the
3944 // size expression of the VLA needs to be treated as an executable expression.
3945 // Why isn't this weirdness documented better in StmtIterator?
3946 if (isArgumentType()) {
3947 if (const VariableArrayType* T = dyn_cast<VariableArrayType>(
3948 getArgumentType().getTypePtr()))
3949 return child_range(child_iterator(T), child_iterator());
3950 return child_range(child_iterator(), child_iterator());
3952 return child_range(&Argument.Ex, &Argument.Ex + 1);
3955 AtomicExpr::AtomicExpr(SourceLocation BLoc, ArrayRef<Expr*> args,
3956 QualType t, AtomicOp op, SourceLocation RP)
3957 : Expr(AtomicExprClass, t, VK_RValue, OK_Ordinary,
3958 false, false, false, false),
3959 NumSubExprs(args.size()), BuiltinLoc(BLoc), RParenLoc(RP), Op(op)
3961 assert(args.size() == getNumSubExprs(op) && "wrong number of subexpressions");
3962 for (unsigned i = 0; i != args.size(); i++) {
3963 if (args[i]->isTypeDependent())
3964 ExprBits.TypeDependent = true;
3965 if (args[i]->isValueDependent())
3966 ExprBits.ValueDependent = true;
3967 if (args[i]->isInstantiationDependent())
3968 ExprBits.InstantiationDependent = true;
3969 if (args[i]->containsUnexpandedParameterPack())
3970 ExprBits.ContainsUnexpandedParameterPack = true;
3972 SubExprs[i] = args[i];
3976 unsigned AtomicExpr::getNumSubExprs(AtomicOp Op) {
3978 case AO__c11_atomic_init:
3979 case AO__c11_atomic_load:
3980 case AO__atomic_load_n:
3983 case AO__c11_atomic_store:
3984 case AO__c11_atomic_exchange:
3985 case AO__atomic_load:
3986 case AO__atomic_store:
3987 case AO__atomic_store_n:
3988 case AO__atomic_exchange_n:
3989 case AO__c11_atomic_fetch_add:
3990 case AO__c11_atomic_fetch_sub:
3991 case AO__c11_atomic_fetch_and:
3992 case AO__c11_atomic_fetch_or:
3993 case AO__c11_atomic_fetch_xor:
3994 case AO__atomic_fetch_add:
3995 case AO__atomic_fetch_sub:
3996 case AO__atomic_fetch_and:
3997 case AO__atomic_fetch_or:
3998 case AO__atomic_fetch_xor:
3999 case AO__atomic_fetch_nand:
4000 case AO__atomic_add_fetch:
4001 case AO__atomic_sub_fetch:
4002 case AO__atomic_and_fetch:
4003 case AO__atomic_or_fetch:
4004 case AO__atomic_xor_fetch:
4005 case AO__atomic_nand_fetch:
4008 case AO__atomic_exchange:
4011 case AO__c11_atomic_compare_exchange_strong:
4012 case AO__c11_atomic_compare_exchange_weak:
4015 case AO__atomic_compare_exchange:
4016 case AO__atomic_compare_exchange_n:
4019 llvm_unreachable("unknown atomic op");
4022 QualType OMPArraySectionExpr::getBaseOriginalType(Expr *Base) {
4023 unsigned ArraySectionCount = 0;
4024 while (auto *OASE = dyn_cast<OMPArraySectionExpr>(Base->IgnoreParens())) {
4025 Base = OASE->getBase();
4026 ++ArraySectionCount;
4028 while (auto *ASE = dyn_cast<ArraySubscriptExpr>(Base->IgnoreParens())) {
4029 Base = ASE->getBase();
4030 ++ArraySectionCount;
4032 auto OriginalTy = Base->getType();
4033 if (auto *DRE = dyn_cast<DeclRefExpr>(Base))
4034 if (auto *PVD = dyn_cast<ParmVarDecl>(DRE->getDecl()))
4035 OriginalTy = PVD->getOriginalType().getNonReferenceType();
4037 for (unsigned Cnt = 0; Cnt < ArraySectionCount; ++Cnt) {
4038 if (OriginalTy->isAnyPointerType())
4039 OriginalTy = OriginalTy->getPointeeType();
4041 assert (OriginalTy->isArrayType());
4042 OriginalTy = OriginalTy->castAsArrayTypeUnsafe()->getElementType();