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(
1318 totalSizeToAlloc<OffsetOfNode, Expr *>(comps.size(), exprs.size()));
1320 return new (Mem) OffsetOfExpr(C, type, OperatorLoc, tsi, comps, exprs,
1324 OffsetOfExpr *OffsetOfExpr::CreateEmpty(const ASTContext &C,
1325 unsigned numComps, unsigned numExprs) {
1327 C.Allocate(totalSizeToAlloc<OffsetOfNode, Expr *>(numComps, numExprs));
1328 return new (Mem) OffsetOfExpr(numComps, numExprs);
1331 OffsetOfExpr::OffsetOfExpr(const ASTContext &C, QualType type,
1332 SourceLocation OperatorLoc, TypeSourceInfo *tsi,
1333 ArrayRef<OffsetOfNode> comps, ArrayRef<Expr*> exprs,
1334 SourceLocation RParenLoc)
1335 : Expr(OffsetOfExprClass, type, VK_RValue, OK_Ordinary,
1336 /*TypeDependent=*/false,
1337 /*ValueDependent=*/tsi->getType()->isDependentType(),
1338 tsi->getType()->isInstantiationDependentType(),
1339 tsi->getType()->containsUnexpandedParameterPack()),
1340 OperatorLoc(OperatorLoc), RParenLoc(RParenLoc), TSInfo(tsi),
1341 NumComps(comps.size()), NumExprs(exprs.size())
1343 for (unsigned i = 0; i != comps.size(); ++i) {
1344 setComponent(i, comps[i]);
1347 for (unsigned i = 0; i != exprs.size(); ++i) {
1348 if (exprs[i]->isTypeDependent() || exprs[i]->isValueDependent())
1349 ExprBits.ValueDependent = true;
1350 if (exprs[i]->containsUnexpandedParameterPack())
1351 ExprBits.ContainsUnexpandedParameterPack = true;
1353 setIndexExpr(i, exprs[i]);
1357 IdentifierInfo *OffsetOfNode::getFieldName() const {
1358 assert(getKind() == Field || getKind() == Identifier);
1359 if (getKind() == Field)
1360 return getField()->getIdentifier();
1362 return reinterpret_cast<IdentifierInfo *> (Data & ~(uintptr_t)Mask);
1365 UnaryExprOrTypeTraitExpr::UnaryExprOrTypeTraitExpr(
1366 UnaryExprOrTypeTrait ExprKind, Expr *E, QualType resultType,
1367 SourceLocation op, SourceLocation rp)
1368 : Expr(UnaryExprOrTypeTraitExprClass, resultType, VK_RValue, OK_Ordinary,
1369 false, // Never type-dependent (C++ [temp.dep.expr]p3).
1370 // Value-dependent if the argument is type-dependent.
1371 E->isTypeDependent(), E->isInstantiationDependent(),
1372 E->containsUnexpandedParameterPack()),
1373 OpLoc(op), RParenLoc(rp) {
1374 UnaryExprOrTypeTraitExprBits.Kind = ExprKind;
1375 UnaryExprOrTypeTraitExprBits.IsType = false;
1378 // Check to see if we are in the situation where alignof(decl) should be
1379 // dependent because decl's alignment is dependent.
1380 if (ExprKind == UETT_AlignOf) {
1381 if (!isValueDependent() || !isInstantiationDependent()) {
1382 E = E->IgnoreParens();
1384 const ValueDecl *D = nullptr;
1385 if (const auto *DRE = dyn_cast<DeclRefExpr>(E))
1387 else if (const auto *ME = dyn_cast<MemberExpr>(E))
1388 D = ME->getMemberDecl();
1391 for (const auto *I : D->specific_attrs<AlignedAttr>()) {
1392 if (I->isAlignmentDependent()) {
1393 setValueDependent(true);
1394 setInstantiationDependent(true);
1403 MemberExpr *MemberExpr::Create(
1404 const ASTContext &C, Expr *base, bool isarrow, SourceLocation OperatorLoc,
1405 NestedNameSpecifierLoc QualifierLoc, SourceLocation TemplateKWLoc,
1406 ValueDecl *memberdecl, DeclAccessPair founddecl,
1407 DeclarationNameInfo nameinfo, const TemplateArgumentListInfo *targs,
1408 QualType ty, ExprValueKind vk, ExprObjectKind ok) {
1410 bool hasQualOrFound = (QualifierLoc ||
1411 founddecl.getDecl() != memberdecl ||
1412 founddecl.getAccess() != memberdecl->getAccess());
1414 bool HasTemplateKWAndArgsInfo = targs || TemplateKWLoc.isValid();
1416 totalSizeToAlloc<MemberExprNameQualifier, ASTTemplateKWAndArgsInfo,
1417 TemplateArgumentLoc>(hasQualOrFound ? 1 : 0,
1418 HasTemplateKWAndArgsInfo ? 1 : 0,
1419 targs ? targs->size() : 0);
1421 void *Mem = C.Allocate(Size, llvm::alignOf<MemberExpr>());
1422 MemberExpr *E = new (Mem)
1423 MemberExpr(base, isarrow, OperatorLoc, memberdecl, nameinfo, ty, vk, ok);
1425 if (hasQualOrFound) {
1426 // FIXME: Wrong. We should be looking at the member declaration we found.
1427 if (QualifierLoc && QualifierLoc.getNestedNameSpecifier()->isDependent()) {
1428 E->setValueDependent(true);
1429 E->setTypeDependent(true);
1430 E->setInstantiationDependent(true);
1432 else if (QualifierLoc &&
1433 QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent())
1434 E->setInstantiationDependent(true);
1436 E->HasQualifierOrFoundDecl = true;
1438 MemberExprNameQualifier *NQ =
1439 E->getTrailingObjects<MemberExprNameQualifier>();
1440 NQ->QualifierLoc = QualifierLoc;
1441 NQ->FoundDecl = founddecl;
1444 E->HasTemplateKWAndArgsInfo = (targs || TemplateKWLoc.isValid());
1447 bool Dependent = false;
1448 bool InstantiationDependent = false;
1449 bool ContainsUnexpandedParameterPack = false;
1450 E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
1451 TemplateKWLoc, *targs, E->getTrailingObjects<TemplateArgumentLoc>(),
1452 Dependent, InstantiationDependent, ContainsUnexpandedParameterPack);
1453 if (InstantiationDependent)
1454 E->setInstantiationDependent(true);
1455 } else if (TemplateKWLoc.isValid()) {
1456 E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
1463 SourceLocation MemberExpr::getLocStart() const {
1464 if (isImplicitAccess()) {
1466 return getQualifierLoc().getBeginLoc();
1470 // FIXME: We don't want this to happen. Rather, we should be able to
1471 // detect all kinds of implicit accesses more cleanly.
1472 SourceLocation BaseStartLoc = getBase()->getLocStart();
1473 if (BaseStartLoc.isValid())
1474 return BaseStartLoc;
1477 SourceLocation MemberExpr::getLocEnd() const {
1478 SourceLocation EndLoc = getMemberNameInfo().getEndLoc();
1479 if (hasExplicitTemplateArgs())
1480 EndLoc = getRAngleLoc();
1481 else if (EndLoc.isInvalid())
1482 EndLoc = getBase()->getLocEnd();
1486 bool CastExpr::CastConsistency() const {
1487 switch (getCastKind()) {
1488 case CK_DerivedToBase:
1489 case CK_UncheckedDerivedToBase:
1490 case CK_DerivedToBaseMemberPointer:
1491 case CK_BaseToDerived:
1492 case CK_BaseToDerivedMemberPointer:
1493 assert(!path_empty() && "Cast kind should have a base path!");
1496 case CK_CPointerToObjCPointerCast:
1497 assert(getType()->isObjCObjectPointerType());
1498 assert(getSubExpr()->getType()->isPointerType());
1499 goto CheckNoBasePath;
1501 case CK_BlockPointerToObjCPointerCast:
1502 assert(getType()->isObjCObjectPointerType());
1503 assert(getSubExpr()->getType()->isBlockPointerType());
1504 goto CheckNoBasePath;
1506 case CK_ReinterpretMemberPointer:
1507 assert(getType()->isMemberPointerType());
1508 assert(getSubExpr()->getType()->isMemberPointerType());
1509 goto CheckNoBasePath;
1512 // Arbitrary casts to C pointer types count as bitcasts.
1513 // Otherwise, we should only have block and ObjC pointer casts
1514 // here if they stay within the type kind.
1515 if (!getType()->isPointerType()) {
1516 assert(getType()->isObjCObjectPointerType() ==
1517 getSubExpr()->getType()->isObjCObjectPointerType());
1518 assert(getType()->isBlockPointerType() ==
1519 getSubExpr()->getType()->isBlockPointerType());
1521 goto CheckNoBasePath;
1523 case CK_AnyPointerToBlockPointerCast:
1524 assert(getType()->isBlockPointerType());
1525 assert(getSubExpr()->getType()->isAnyPointerType() &&
1526 !getSubExpr()->getType()->isBlockPointerType());
1527 goto CheckNoBasePath;
1529 case CK_CopyAndAutoreleaseBlockObject:
1530 assert(getType()->isBlockPointerType());
1531 assert(getSubExpr()->getType()->isBlockPointerType());
1532 goto CheckNoBasePath;
1534 case CK_FunctionToPointerDecay:
1535 assert(getType()->isPointerType());
1536 assert(getSubExpr()->getType()->isFunctionType());
1537 goto CheckNoBasePath;
1539 case CK_AddressSpaceConversion:
1540 assert(getType()->isPointerType());
1541 assert(getSubExpr()->getType()->isPointerType());
1542 assert(getType()->getPointeeType().getAddressSpace() !=
1543 getSubExpr()->getType()->getPointeeType().getAddressSpace());
1544 // These should not have an inheritance path.
1547 case CK_ArrayToPointerDecay:
1548 case CK_NullToMemberPointer:
1549 case CK_NullToPointer:
1550 case CK_ConstructorConversion:
1551 case CK_IntegralToPointer:
1552 case CK_PointerToIntegral:
1554 case CK_VectorSplat:
1555 case CK_IntegralCast:
1556 case CK_BooleanToSignedIntegral:
1557 case CK_IntegralToFloating:
1558 case CK_FloatingToIntegral:
1559 case CK_FloatingCast:
1560 case CK_ObjCObjectLValueCast:
1561 case CK_FloatingRealToComplex:
1562 case CK_FloatingComplexToReal:
1563 case CK_FloatingComplexCast:
1564 case CK_FloatingComplexToIntegralComplex:
1565 case CK_IntegralRealToComplex:
1566 case CK_IntegralComplexToReal:
1567 case CK_IntegralComplexCast:
1568 case CK_IntegralComplexToFloatingComplex:
1569 case CK_ARCProduceObject:
1570 case CK_ARCConsumeObject:
1571 case CK_ARCReclaimReturnedObject:
1572 case CK_ARCExtendBlockObject:
1573 case CK_ZeroToOCLEvent:
1574 assert(!getType()->isBooleanType() && "unheralded conversion to bool");
1575 goto CheckNoBasePath;
1578 case CK_LValueToRValue:
1580 case CK_AtomicToNonAtomic:
1581 case CK_NonAtomicToAtomic:
1582 case CK_PointerToBoolean:
1583 case CK_IntegralToBoolean:
1584 case CK_FloatingToBoolean:
1585 case CK_MemberPointerToBoolean:
1586 case CK_FloatingComplexToBoolean:
1587 case CK_IntegralComplexToBoolean:
1588 case CK_LValueBitCast: // -> bool&
1589 case CK_UserDefinedConversion: // operator bool()
1590 case CK_BuiltinFnToFnPtr:
1592 assert(path_empty() && "Cast kind should not have a base path!");
1598 const char *CastExpr::getCastKindName() const {
1599 switch (getCastKind()) {
1604 case CK_LValueBitCast:
1605 return "LValueBitCast";
1606 case CK_LValueToRValue:
1607 return "LValueToRValue";
1610 case CK_BaseToDerived:
1611 return "BaseToDerived";
1612 case CK_DerivedToBase:
1613 return "DerivedToBase";
1614 case CK_UncheckedDerivedToBase:
1615 return "UncheckedDerivedToBase";
1620 case CK_ArrayToPointerDecay:
1621 return "ArrayToPointerDecay";
1622 case CK_FunctionToPointerDecay:
1623 return "FunctionToPointerDecay";
1624 case CK_NullToMemberPointer:
1625 return "NullToMemberPointer";
1626 case CK_NullToPointer:
1627 return "NullToPointer";
1628 case CK_BaseToDerivedMemberPointer:
1629 return "BaseToDerivedMemberPointer";
1630 case CK_DerivedToBaseMemberPointer:
1631 return "DerivedToBaseMemberPointer";
1632 case CK_ReinterpretMemberPointer:
1633 return "ReinterpretMemberPointer";
1634 case CK_UserDefinedConversion:
1635 return "UserDefinedConversion";
1636 case CK_ConstructorConversion:
1637 return "ConstructorConversion";
1638 case CK_IntegralToPointer:
1639 return "IntegralToPointer";
1640 case CK_PointerToIntegral:
1641 return "PointerToIntegral";
1642 case CK_PointerToBoolean:
1643 return "PointerToBoolean";
1646 case CK_VectorSplat:
1647 return "VectorSplat";
1648 case CK_IntegralCast:
1649 return "IntegralCast";
1650 case CK_BooleanToSignedIntegral:
1651 return "BooleanToSignedIntegral";
1652 case CK_IntegralToBoolean:
1653 return "IntegralToBoolean";
1654 case CK_IntegralToFloating:
1655 return "IntegralToFloating";
1656 case CK_FloatingToIntegral:
1657 return "FloatingToIntegral";
1658 case CK_FloatingCast:
1659 return "FloatingCast";
1660 case CK_FloatingToBoolean:
1661 return "FloatingToBoolean";
1662 case CK_MemberPointerToBoolean:
1663 return "MemberPointerToBoolean";
1664 case CK_CPointerToObjCPointerCast:
1665 return "CPointerToObjCPointerCast";
1666 case CK_BlockPointerToObjCPointerCast:
1667 return "BlockPointerToObjCPointerCast";
1668 case CK_AnyPointerToBlockPointerCast:
1669 return "AnyPointerToBlockPointerCast";
1670 case CK_ObjCObjectLValueCast:
1671 return "ObjCObjectLValueCast";
1672 case CK_FloatingRealToComplex:
1673 return "FloatingRealToComplex";
1674 case CK_FloatingComplexToReal:
1675 return "FloatingComplexToReal";
1676 case CK_FloatingComplexToBoolean:
1677 return "FloatingComplexToBoolean";
1678 case CK_FloatingComplexCast:
1679 return "FloatingComplexCast";
1680 case CK_FloatingComplexToIntegralComplex:
1681 return "FloatingComplexToIntegralComplex";
1682 case CK_IntegralRealToComplex:
1683 return "IntegralRealToComplex";
1684 case CK_IntegralComplexToReal:
1685 return "IntegralComplexToReal";
1686 case CK_IntegralComplexToBoolean:
1687 return "IntegralComplexToBoolean";
1688 case CK_IntegralComplexCast:
1689 return "IntegralComplexCast";
1690 case CK_IntegralComplexToFloatingComplex:
1691 return "IntegralComplexToFloatingComplex";
1692 case CK_ARCConsumeObject:
1693 return "ARCConsumeObject";
1694 case CK_ARCProduceObject:
1695 return "ARCProduceObject";
1696 case CK_ARCReclaimReturnedObject:
1697 return "ARCReclaimReturnedObject";
1698 case CK_ARCExtendBlockObject:
1699 return "ARCExtendBlockObject";
1700 case CK_AtomicToNonAtomic:
1701 return "AtomicToNonAtomic";
1702 case CK_NonAtomicToAtomic:
1703 return "NonAtomicToAtomic";
1704 case CK_CopyAndAutoreleaseBlockObject:
1705 return "CopyAndAutoreleaseBlockObject";
1706 case CK_BuiltinFnToFnPtr:
1707 return "BuiltinFnToFnPtr";
1708 case CK_ZeroToOCLEvent:
1709 return "ZeroToOCLEvent";
1710 case CK_AddressSpaceConversion:
1711 return "AddressSpaceConversion";
1714 llvm_unreachable("Unhandled cast kind!");
1717 Expr *CastExpr::getSubExprAsWritten() {
1718 Expr *SubExpr = nullptr;
1721 SubExpr = E->getSubExpr();
1723 // Skip through reference binding to temporary.
1724 if (MaterializeTemporaryExpr *Materialize
1725 = dyn_cast<MaterializeTemporaryExpr>(SubExpr))
1726 SubExpr = Materialize->GetTemporaryExpr();
1728 // Skip any temporary bindings; they're implicit.
1729 if (CXXBindTemporaryExpr *Binder = dyn_cast<CXXBindTemporaryExpr>(SubExpr))
1730 SubExpr = Binder->getSubExpr();
1732 // Conversions by constructor and conversion functions have a
1733 // subexpression describing the call; strip it off.
1734 if (E->getCastKind() == CK_ConstructorConversion)
1735 SubExpr = cast<CXXConstructExpr>(SubExpr)->getArg(0);
1736 else if (E->getCastKind() == CK_UserDefinedConversion)
1737 SubExpr = cast<CXXMemberCallExpr>(SubExpr)->getImplicitObjectArgument();
1739 // If the subexpression we're left with is an implicit cast, look
1740 // through that, too.
1741 } while ((E = dyn_cast<ImplicitCastExpr>(SubExpr)));
1746 CXXBaseSpecifier **CastExpr::path_buffer() {
1747 switch (getStmtClass()) {
1748 #define ABSTRACT_STMT(x)
1749 #define CASTEXPR(Type, Base) \
1750 case Stmt::Type##Class: \
1751 return static_cast<Type *>(this)->getTrailingObjects<CXXBaseSpecifier *>();
1752 #define STMT(Type, Base)
1753 #include "clang/AST/StmtNodes.inc"
1755 llvm_unreachable("non-cast expressions not possible here");
1759 ImplicitCastExpr *ImplicitCastExpr::Create(const ASTContext &C, QualType T,
1760 CastKind Kind, Expr *Operand,
1761 const CXXCastPath *BasePath,
1763 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1764 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1765 ImplicitCastExpr *E =
1766 new (Buffer) ImplicitCastExpr(T, Kind, Operand, PathSize, VK);
1768 std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
1769 E->getTrailingObjects<CXXBaseSpecifier *>());
1773 ImplicitCastExpr *ImplicitCastExpr::CreateEmpty(const ASTContext &C,
1774 unsigned PathSize) {
1775 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1776 return new (Buffer) ImplicitCastExpr(EmptyShell(), PathSize);
1780 CStyleCastExpr *CStyleCastExpr::Create(const ASTContext &C, QualType T,
1781 ExprValueKind VK, CastKind K, Expr *Op,
1782 const CXXCastPath *BasePath,
1783 TypeSourceInfo *WrittenTy,
1784 SourceLocation L, SourceLocation R) {
1785 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1786 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1788 new (Buffer) CStyleCastExpr(T, VK, K, Op, PathSize, WrittenTy, L, R);
1790 std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
1791 E->getTrailingObjects<CXXBaseSpecifier *>());
1795 CStyleCastExpr *CStyleCastExpr::CreateEmpty(const ASTContext &C,
1796 unsigned PathSize) {
1797 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1798 return new (Buffer) CStyleCastExpr(EmptyShell(), PathSize);
1801 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1802 /// corresponds to, e.g. "<<=".
1803 StringRef BinaryOperator::getOpcodeStr(Opcode Op) {
1805 case BO_PtrMemD: return ".*";
1806 case BO_PtrMemI: return "->*";
1807 case BO_Mul: return "*";
1808 case BO_Div: return "/";
1809 case BO_Rem: return "%";
1810 case BO_Add: return "+";
1811 case BO_Sub: return "-";
1812 case BO_Shl: return "<<";
1813 case BO_Shr: return ">>";
1814 case BO_LT: return "<";
1815 case BO_GT: return ">";
1816 case BO_LE: return "<=";
1817 case BO_GE: return ">=";
1818 case BO_EQ: return "==";
1819 case BO_NE: return "!=";
1820 case BO_And: return "&";
1821 case BO_Xor: return "^";
1822 case BO_Or: return "|";
1823 case BO_LAnd: return "&&";
1824 case BO_LOr: return "||";
1825 case BO_Assign: return "=";
1826 case BO_MulAssign: return "*=";
1827 case BO_DivAssign: return "/=";
1828 case BO_RemAssign: return "%=";
1829 case BO_AddAssign: return "+=";
1830 case BO_SubAssign: return "-=";
1831 case BO_ShlAssign: return "<<=";
1832 case BO_ShrAssign: return ">>=";
1833 case BO_AndAssign: return "&=";
1834 case BO_XorAssign: return "^=";
1835 case BO_OrAssign: return "|=";
1836 case BO_Comma: return ",";
1839 llvm_unreachable("Invalid OpCode!");
1843 BinaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO) {
1845 default: llvm_unreachable("Not an overloadable binary operator");
1846 case OO_Plus: return BO_Add;
1847 case OO_Minus: return BO_Sub;
1848 case OO_Star: return BO_Mul;
1849 case OO_Slash: return BO_Div;
1850 case OO_Percent: return BO_Rem;
1851 case OO_Caret: return BO_Xor;
1852 case OO_Amp: return BO_And;
1853 case OO_Pipe: return BO_Or;
1854 case OO_Equal: return BO_Assign;
1855 case OO_Less: return BO_LT;
1856 case OO_Greater: return BO_GT;
1857 case OO_PlusEqual: return BO_AddAssign;
1858 case OO_MinusEqual: return BO_SubAssign;
1859 case OO_StarEqual: return BO_MulAssign;
1860 case OO_SlashEqual: return BO_DivAssign;
1861 case OO_PercentEqual: return BO_RemAssign;
1862 case OO_CaretEqual: return BO_XorAssign;
1863 case OO_AmpEqual: return BO_AndAssign;
1864 case OO_PipeEqual: return BO_OrAssign;
1865 case OO_LessLess: return BO_Shl;
1866 case OO_GreaterGreater: return BO_Shr;
1867 case OO_LessLessEqual: return BO_ShlAssign;
1868 case OO_GreaterGreaterEqual: return BO_ShrAssign;
1869 case OO_EqualEqual: return BO_EQ;
1870 case OO_ExclaimEqual: return BO_NE;
1871 case OO_LessEqual: return BO_LE;
1872 case OO_GreaterEqual: return BO_GE;
1873 case OO_AmpAmp: return BO_LAnd;
1874 case OO_PipePipe: return BO_LOr;
1875 case OO_Comma: return BO_Comma;
1876 case OO_ArrowStar: return BO_PtrMemI;
1880 OverloadedOperatorKind BinaryOperator::getOverloadedOperator(Opcode Opc) {
1881 static const OverloadedOperatorKind OverOps[] = {
1882 /* .* Cannot be overloaded */OO_None, OO_ArrowStar,
1883 OO_Star, OO_Slash, OO_Percent,
1885 OO_LessLess, OO_GreaterGreater,
1886 OO_Less, OO_Greater, OO_LessEqual, OO_GreaterEqual,
1887 OO_EqualEqual, OO_ExclaimEqual,
1893 OO_Equal, OO_StarEqual,
1894 OO_SlashEqual, OO_PercentEqual,
1895 OO_PlusEqual, OO_MinusEqual,
1896 OO_LessLessEqual, OO_GreaterGreaterEqual,
1897 OO_AmpEqual, OO_CaretEqual,
1901 return OverOps[Opc];
1904 InitListExpr::InitListExpr(const ASTContext &C, SourceLocation lbraceloc,
1905 ArrayRef<Expr*> initExprs, SourceLocation rbraceloc)
1906 : Expr(InitListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false,
1908 InitExprs(C, initExprs.size()),
1909 LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), AltForm(nullptr, true)
1911 sawArrayRangeDesignator(false);
1912 for (unsigned I = 0; I != initExprs.size(); ++I) {
1913 if (initExprs[I]->isTypeDependent())
1914 ExprBits.TypeDependent = true;
1915 if (initExprs[I]->isValueDependent())
1916 ExprBits.ValueDependent = true;
1917 if (initExprs[I]->isInstantiationDependent())
1918 ExprBits.InstantiationDependent = true;
1919 if (initExprs[I]->containsUnexpandedParameterPack())
1920 ExprBits.ContainsUnexpandedParameterPack = true;
1923 InitExprs.insert(C, InitExprs.end(), initExprs.begin(), initExprs.end());
1926 void InitListExpr::reserveInits(const ASTContext &C, unsigned NumInits) {
1927 if (NumInits > InitExprs.size())
1928 InitExprs.reserve(C, NumInits);
1931 void InitListExpr::resizeInits(const ASTContext &C, unsigned NumInits) {
1932 InitExprs.resize(C, NumInits, nullptr);
1935 Expr *InitListExpr::updateInit(const ASTContext &C, unsigned Init, Expr *expr) {
1936 if (Init >= InitExprs.size()) {
1937 InitExprs.insert(C, InitExprs.end(), Init - InitExprs.size() + 1, nullptr);
1938 setInit(Init, expr);
1942 Expr *Result = cast_or_null<Expr>(InitExprs[Init]);
1943 setInit(Init, expr);
1947 void InitListExpr::setArrayFiller(Expr *filler) {
1948 assert(!hasArrayFiller() && "Filler already set!");
1949 ArrayFillerOrUnionFieldInit = filler;
1950 // Fill out any "holes" in the array due to designated initializers.
1951 Expr **inits = getInits();
1952 for (unsigned i = 0, e = getNumInits(); i != e; ++i)
1953 if (inits[i] == nullptr)
1957 bool InitListExpr::isStringLiteralInit() const {
1958 if (getNumInits() != 1)
1960 const ArrayType *AT = getType()->getAsArrayTypeUnsafe();
1961 if (!AT || !AT->getElementType()->isIntegerType())
1963 // It is possible for getInit() to return null.
1964 const Expr *Init = getInit(0);
1967 Init = Init->IgnoreParens();
1968 return isa<StringLiteral>(Init) || isa<ObjCEncodeExpr>(Init);
1971 SourceLocation InitListExpr::getLocStart() const {
1972 if (InitListExpr *SyntacticForm = getSyntacticForm())
1973 return SyntacticForm->getLocStart();
1974 SourceLocation Beg = LBraceLoc;
1975 if (Beg.isInvalid()) {
1976 // Find the first non-null initializer.
1977 for (InitExprsTy::const_iterator I = InitExprs.begin(),
1978 E = InitExprs.end();
1981 Beg = S->getLocStart();
1989 SourceLocation InitListExpr::getLocEnd() const {
1990 if (InitListExpr *SyntacticForm = getSyntacticForm())
1991 return SyntacticForm->getLocEnd();
1992 SourceLocation End = RBraceLoc;
1993 if (End.isInvalid()) {
1994 // Find the first non-null initializer from the end.
1995 for (InitExprsTy::const_reverse_iterator I = InitExprs.rbegin(),
1996 E = InitExprs.rend();
1999 End = S->getLocEnd();
2007 /// getFunctionType - Return the underlying function type for this block.
2009 const FunctionProtoType *BlockExpr::getFunctionType() const {
2010 // The block pointer is never sugared, but the function type might be.
2011 return cast<BlockPointerType>(getType())
2012 ->getPointeeType()->castAs<FunctionProtoType>();
2015 SourceLocation BlockExpr::getCaretLocation() const {
2016 return TheBlock->getCaretLocation();
2018 const Stmt *BlockExpr::getBody() const {
2019 return TheBlock->getBody();
2021 Stmt *BlockExpr::getBody() {
2022 return TheBlock->getBody();
2026 //===----------------------------------------------------------------------===//
2027 // Generic Expression Routines
2028 //===----------------------------------------------------------------------===//
2030 /// isUnusedResultAWarning - Return true if this immediate expression should
2031 /// be warned about if the result is unused. If so, fill in Loc and Ranges
2032 /// with location to warn on and the source range[s] to report with the
2034 bool Expr::isUnusedResultAWarning(const Expr *&WarnE, SourceLocation &Loc,
2035 SourceRange &R1, SourceRange &R2,
2036 ASTContext &Ctx) const {
2037 // Don't warn if the expr is type dependent. The type could end up
2038 // instantiating to void.
2039 if (isTypeDependent())
2042 switch (getStmtClass()) {
2044 if (getType()->isVoidType())
2048 R1 = getSourceRange();
2050 case ParenExprClass:
2051 return cast<ParenExpr>(this)->getSubExpr()->
2052 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2053 case GenericSelectionExprClass:
2054 return cast<GenericSelectionExpr>(this)->getResultExpr()->
2055 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2056 case ChooseExprClass:
2057 return cast<ChooseExpr>(this)->getChosenSubExpr()->
2058 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2059 case UnaryOperatorClass: {
2060 const UnaryOperator *UO = cast<UnaryOperator>(this);
2062 switch (UO->getOpcode()) {
2071 // This is just the 'operator co_await' call inside the guts of a
2072 // dependent co_await call.
2076 case UO_PreDec: // ++/--
2077 return false; // Not a warning.
2080 // accessing a piece of a volatile complex is a side-effect.
2081 if (Ctx.getCanonicalType(UO->getSubExpr()->getType())
2082 .isVolatileQualified())
2086 return UO->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2089 Loc = UO->getOperatorLoc();
2090 R1 = UO->getSubExpr()->getSourceRange();
2093 case BinaryOperatorClass: {
2094 const BinaryOperator *BO = cast<BinaryOperator>(this);
2095 switch (BO->getOpcode()) {
2098 // Consider the RHS of comma for side effects. LHS was checked by
2099 // Sema::CheckCommaOperands.
2101 // ((foo = <blah>), 0) is an idiom for hiding the result (and
2102 // lvalue-ness) of an assignment written in a macro.
2103 if (IntegerLiteral *IE =
2104 dyn_cast<IntegerLiteral>(BO->getRHS()->IgnoreParens()))
2105 if (IE->getValue() == 0)
2107 return BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2108 // Consider '||', '&&' to have side effects if the LHS or RHS does.
2111 if (!BO->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) ||
2112 !BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2116 if (BO->isAssignmentOp())
2119 Loc = BO->getOperatorLoc();
2120 R1 = BO->getLHS()->getSourceRange();
2121 R2 = BO->getRHS()->getSourceRange();
2124 case CompoundAssignOperatorClass:
2125 case VAArgExprClass:
2126 case AtomicExprClass:
2129 case ConditionalOperatorClass: {
2130 // If only one of the LHS or RHS is a warning, the operator might
2131 // be being used for control flow. Only warn if both the LHS and
2132 // RHS are warnings.
2133 const ConditionalOperator *Exp = cast<ConditionalOperator>(this);
2134 if (!Exp->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2138 return Exp->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2141 case MemberExprClass:
2143 Loc = cast<MemberExpr>(this)->getMemberLoc();
2144 R1 = SourceRange(Loc, Loc);
2145 R2 = cast<MemberExpr>(this)->getBase()->getSourceRange();
2148 case ArraySubscriptExprClass:
2150 Loc = cast<ArraySubscriptExpr>(this)->getRBracketLoc();
2151 R1 = cast<ArraySubscriptExpr>(this)->getLHS()->getSourceRange();
2152 R2 = cast<ArraySubscriptExpr>(this)->getRHS()->getSourceRange();
2155 case CXXOperatorCallExprClass: {
2156 // Warn about operator ==,!=,<,>,<=, and >= even when user-defined operator
2157 // overloads as there is no reasonable way to define these such that they
2158 // have non-trivial, desirable side-effects. See the -Wunused-comparison
2159 // warning: operators == and != are commonly typo'ed, and so warning on them
2160 // provides additional value as well. If this list is updated,
2161 // DiagnoseUnusedComparison should be as well.
2162 const CXXOperatorCallExpr *Op = cast<CXXOperatorCallExpr>(this);
2163 switch (Op->getOperator()) {
2167 case OO_ExclaimEqual:
2170 case OO_GreaterEqual:
2172 if (Op->getCallReturnType(Ctx)->isReferenceType() ||
2173 Op->getCallReturnType(Ctx)->isVoidType())
2176 Loc = Op->getOperatorLoc();
2177 R1 = Op->getSourceRange();
2181 // Fallthrough for generic call handling.
2184 case CXXMemberCallExprClass:
2185 case UserDefinedLiteralClass: {
2186 // If this is a direct call, get the callee.
2187 const CallExpr *CE = cast<CallExpr>(this);
2188 if (const Decl *FD = CE->getCalleeDecl()) {
2189 const FunctionDecl *Func = dyn_cast<FunctionDecl>(FD);
2190 bool HasWarnUnusedResultAttr = Func ? Func->hasUnusedResultAttr()
2191 : FD->hasAttr<WarnUnusedResultAttr>();
2193 // If the callee has attribute pure, const, or warn_unused_result, warn
2194 // about it. void foo() { strlen("bar"); } should warn.
2196 // Note: If new cases are added here, DiagnoseUnusedExprResult should be
2197 // updated to match for QoI.
2198 if (HasWarnUnusedResultAttr ||
2199 FD->hasAttr<PureAttr>() || FD->hasAttr<ConstAttr>()) {
2201 Loc = CE->getCallee()->getLocStart();
2202 R1 = CE->getCallee()->getSourceRange();
2204 if (unsigned NumArgs = CE->getNumArgs())
2205 R2 = SourceRange(CE->getArg(0)->getLocStart(),
2206 CE->getArg(NumArgs-1)->getLocEnd());
2213 // If we don't know precisely what we're looking at, let's not warn.
2214 case UnresolvedLookupExprClass:
2215 case CXXUnresolvedConstructExprClass:
2218 case CXXTemporaryObjectExprClass:
2219 case CXXConstructExprClass: {
2220 if (const CXXRecordDecl *Type = getType()->getAsCXXRecordDecl()) {
2221 if (Type->hasAttr<WarnUnusedAttr>()) {
2223 Loc = getLocStart();
2224 R1 = getSourceRange();
2231 case ObjCMessageExprClass: {
2232 const ObjCMessageExpr *ME = cast<ObjCMessageExpr>(this);
2233 if (Ctx.getLangOpts().ObjCAutoRefCount &&
2234 ME->isInstanceMessage() &&
2235 !ME->getType()->isVoidType() &&
2236 ME->getMethodFamily() == OMF_init) {
2239 R1 = ME->getSourceRange();
2243 if (const ObjCMethodDecl *MD = ME->getMethodDecl())
2244 if (MD->hasAttr<WarnUnusedResultAttr>()) {
2253 case ObjCPropertyRefExprClass:
2256 R1 = getSourceRange();
2259 case PseudoObjectExprClass: {
2260 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
2262 // Only complain about things that have the form of a getter.
2263 if (isa<UnaryOperator>(PO->getSyntacticForm()) ||
2264 isa<BinaryOperator>(PO->getSyntacticForm()))
2269 R1 = getSourceRange();
2273 case StmtExprClass: {
2274 // Statement exprs don't logically have side effects themselves, but are
2275 // sometimes used in macros in ways that give them a type that is unused.
2276 // For example ({ blah; foo(); }) will end up with a type if foo has a type.
2277 // however, if the result of the stmt expr is dead, we don't want to emit a
2279 const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt();
2280 if (!CS->body_empty()) {
2281 if (const Expr *E = dyn_cast<Expr>(CS->body_back()))
2282 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2283 if (const LabelStmt *Label = dyn_cast<LabelStmt>(CS->body_back()))
2284 if (const Expr *E = dyn_cast<Expr>(Label->getSubStmt()))
2285 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2288 if (getType()->isVoidType())
2291 Loc = cast<StmtExpr>(this)->getLParenLoc();
2292 R1 = getSourceRange();
2295 case CXXFunctionalCastExprClass:
2296 case CStyleCastExprClass: {
2297 // Ignore an explicit cast to void unless the operand is a non-trivial
2299 const CastExpr *CE = cast<CastExpr>(this);
2300 if (CE->getCastKind() == CK_ToVoid) {
2301 if (CE->getSubExpr()->isGLValue() &&
2302 CE->getSubExpr()->getType().isVolatileQualified()) {
2303 const DeclRefExpr *DRE =
2304 dyn_cast<DeclRefExpr>(CE->getSubExpr()->IgnoreParens());
2305 if (!(DRE && isa<VarDecl>(DRE->getDecl()) &&
2306 cast<VarDecl>(DRE->getDecl())->hasLocalStorage())) {
2307 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc,
2314 // If this is a cast to a constructor conversion, check the operand.
2315 // Otherwise, the result of the cast is unused.
2316 if (CE->getCastKind() == CK_ConstructorConversion)
2317 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2320 if (const CXXFunctionalCastExpr *CXXCE =
2321 dyn_cast<CXXFunctionalCastExpr>(this)) {
2322 Loc = CXXCE->getLocStart();
2323 R1 = CXXCE->getSubExpr()->getSourceRange();
2325 const CStyleCastExpr *CStyleCE = cast<CStyleCastExpr>(this);
2326 Loc = CStyleCE->getLParenLoc();
2327 R1 = CStyleCE->getSubExpr()->getSourceRange();
2331 case ImplicitCastExprClass: {
2332 const CastExpr *ICE = cast<ImplicitCastExpr>(this);
2334 // lvalue-to-rvalue conversion on a volatile lvalue is a side-effect.
2335 if (ICE->getCastKind() == CK_LValueToRValue &&
2336 ICE->getSubExpr()->getType().isVolatileQualified())
2339 return ICE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2341 case CXXDefaultArgExprClass:
2342 return (cast<CXXDefaultArgExpr>(this)
2343 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2344 case CXXDefaultInitExprClass:
2345 return (cast<CXXDefaultInitExpr>(this)
2346 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2348 case CXXNewExprClass:
2349 // FIXME: In theory, there might be new expressions that don't have side
2350 // effects (e.g. a placement new with an uninitialized POD).
2351 case CXXDeleteExprClass:
2353 case CXXBindTemporaryExprClass:
2354 return (cast<CXXBindTemporaryExpr>(this)
2355 ->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2356 case ExprWithCleanupsClass:
2357 return (cast<ExprWithCleanups>(this)
2358 ->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2362 /// isOBJCGCCandidate - Check if an expression is objc gc'able.
2363 /// returns true, if it is; false otherwise.
2364 bool Expr::isOBJCGCCandidate(ASTContext &Ctx) const {
2365 const Expr *E = IgnoreParens();
2366 switch (E->getStmtClass()) {
2369 case ObjCIvarRefExprClass:
2371 case Expr::UnaryOperatorClass:
2372 return cast<UnaryOperator>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2373 case ImplicitCastExprClass:
2374 return cast<ImplicitCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2375 case MaterializeTemporaryExprClass:
2376 return cast<MaterializeTemporaryExpr>(E)->GetTemporaryExpr()
2377 ->isOBJCGCCandidate(Ctx);
2378 case CStyleCastExprClass:
2379 return cast<CStyleCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2380 case DeclRefExprClass: {
2381 const Decl *D = cast<DeclRefExpr>(E)->getDecl();
2383 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
2384 if (VD->hasGlobalStorage())
2386 QualType T = VD->getType();
2387 // dereferencing to a pointer is always a gc'able candidate,
2388 // unless it is __weak.
2389 return T->isPointerType() &&
2390 (Ctx.getObjCGCAttrKind(T) != Qualifiers::Weak);
2394 case MemberExprClass: {
2395 const MemberExpr *M = cast<MemberExpr>(E);
2396 return M->getBase()->isOBJCGCCandidate(Ctx);
2398 case ArraySubscriptExprClass:
2399 return cast<ArraySubscriptExpr>(E)->getBase()->isOBJCGCCandidate(Ctx);
2403 bool Expr::isBoundMemberFunction(ASTContext &Ctx) const {
2404 if (isTypeDependent())
2406 return ClassifyLValue(Ctx) == Expr::LV_MemberFunction;
2409 QualType Expr::findBoundMemberType(const Expr *expr) {
2410 assert(expr->hasPlaceholderType(BuiltinType::BoundMember));
2412 // Bound member expressions are always one of these possibilities:
2413 // x->m x.m x->*y x.*y
2414 // (possibly parenthesized)
2416 expr = expr->IgnoreParens();
2417 if (const MemberExpr *mem = dyn_cast<MemberExpr>(expr)) {
2418 assert(isa<CXXMethodDecl>(mem->getMemberDecl()));
2419 return mem->getMemberDecl()->getType();
2422 if (const BinaryOperator *op = dyn_cast<BinaryOperator>(expr)) {
2423 QualType type = op->getRHS()->getType()->castAs<MemberPointerType>()
2425 assert(type->isFunctionType());
2429 assert(isa<UnresolvedMemberExpr>(expr) || isa<CXXPseudoDestructorExpr>(expr));
2433 Expr* Expr::IgnoreParens() {
2436 if (ParenExpr* P = dyn_cast<ParenExpr>(E)) {
2437 E = P->getSubExpr();
2440 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) {
2441 if (P->getOpcode() == UO_Extension) {
2442 E = P->getSubExpr();
2446 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) {
2447 if (!P->isResultDependent()) {
2448 E = P->getResultExpr();
2452 if (ChooseExpr* P = dyn_cast<ChooseExpr>(E)) {
2453 if (!P->isConditionDependent()) {
2454 E = P->getChosenSubExpr();
2462 /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr
2463 /// or CastExprs or ImplicitCastExprs, returning their operand.
2464 Expr *Expr::IgnoreParenCasts() {
2467 E = E->IgnoreParens();
2468 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2469 E = P->getSubExpr();
2472 if (MaterializeTemporaryExpr *Materialize
2473 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2474 E = Materialize->GetTemporaryExpr();
2477 if (SubstNonTypeTemplateParmExpr *NTTP
2478 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2479 E = NTTP->getReplacement();
2486 Expr *Expr::IgnoreCasts() {
2489 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2490 E = P->getSubExpr();
2493 if (MaterializeTemporaryExpr *Materialize
2494 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2495 E = Materialize->GetTemporaryExpr();
2498 if (SubstNonTypeTemplateParmExpr *NTTP
2499 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2500 E = NTTP->getReplacement();
2507 /// IgnoreParenLValueCasts - Ignore parentheses and lvalue-to-rvalue
2508 /// casts. This is intended purely as a temporary workaround for code
2509 /// that hasn't yet been rewritten to do the right thing about those
2510 /// casts, and may disappear along with the last internal use.
2511 Expr *Expr::IgnoreParenLValueCasts() {
2514 E = E->IgnoreParens();
2515 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2516 if (P->getCastKind() == CK_LValueToRValue) {
2517 E = P->getSubExpr();
2520 } else if (MaterializeTemporaryExpr *Materialize
2521 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2522 E = Materialize->GetTemporaryExpr();
2524 } else if (SubstNonTypeTemplateParmExpr *NTTP
2525 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2526 E = NTTP->getReplacement();
2534 Expr *Expr::ignoreParenBaseCasts() {
2537 E = E->IgnoreParens();
2538 if (CastExpr *CE = dyn_cast<CastExpr>(E)) {
2539 if (CE->getCastKind() == CK_DerivedToBase ||
2540 CE->getCastKind() == CK_UncheckedDerivedToBase ||
2541 CE->getCastKind() == CK_NoOp) {
2542 E = CE->getSubExpr();
2551 Expr *Expr::IgnoreParenImpCasts() {
2554 E = E->IgnoreParens();
2555 if (ImplicitCastExpr *P = dyn_cast<ImplicitCastExpr>(E)) {
2556 E = P->getSubExpr();
2559 if (MaterializeTemporaryExpr *Materialize
2560 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2561 E = Materialize->GetTemporaryExpr();
2564 if (SubstNonTypeTemplateParmExpr *NTTP
2565 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2566 E = NTTP->getReplacement();
2573 Expr *Expr::IgnoreConversionOperator() {
2574 if (CXXMemberCallExpr *MCE = dyn_cast<CXXMemberCallExpr>(this)) {
2575 if (MCE->getMethodDecl() && isa<CXXConversionDecl>(MCE->getMethodDecl()))
2576 return MCE->getImplicitObjectArgument();
2581 /// IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the
2582 /// value (including ptr->int casts of the same size). Strip off any
2583 /// ParenExpr or CastExprs, returning their operand.
2584 Expr *Expr::IgnoreParenNoopCasts(ASTContext &Ctx) {
2587 E = E->IgnoreParens();
2589 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2590 // We ignore integer <-> casts that are of the same width, ptr<->ptr and
2591 // ptr<->int casts of the same width. We also ignore all identity casts.
2592 Expr *SE = P->getSubExpr();
2594 if (Ctx.hasSameUnqualifiedType(E->getType(), SE->getType())) {
2599 if ((E->getType()->isPointerType() ||
2600 E->getType()->isIntegralType(Ctx)) &&
2601 (SE->getType()->isPointerType() ||
2602 SE->getType()->isIntegralType(Ctx)) &&
2603 Ctx.getTypeSize(E->getType()) == Ctx.getTypeSize(SE->getType())) {
2609 if (SubstNonTypeTemplateParmExpr *NTTP
2610 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2611 E = NTTP->getReplacement();
2619 bool Expr::isDefaultArgument() const {
2620 const Expr *E = this;
2621 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2622 E = M->GetTemporaryExpr();
2624 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E))
2625 E = ICE->getSubExprAsWritten();
2627 return isa<CXXDefaultArgExpr>(E);
2630 /// \brief Skip over any no-op casts and any temporary-binding
2632 static const Expr *skipTemporaryBindingsNoOpCastsAndParens(const Expr *E) {
2633 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2634 E = M->GetTemporaryExpr();
2636 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2637 if (ICE->getCastKind() == CK_NoOp)
2638 E = ICE->getSubExpr();
2643 while (const CXXBindTemporaryExpr *BE = dyn_cast<CXXBindTemporaryExpr>(E))
2644 E = BE->getSubExpr();
2646 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2647 if (ICE->getCastKind() == CK_NoOp)
2648 E = ICE->getSubExpr();
2653 return E->IgnoreParens();
2656 /// isTemporaryObject - Determines if this expression produces a
2657 /// temporary of the given class type.
2658 bool Expr::isTemporaryObject(ASTContext &C, const CXXRecordDecl *TempTy) const {
2659 if (!C.hasSameUnqualifiedType(getType(), C.getTypeDeclType(TempTy)))
2662 const Expr *E = skipTemporaryBindingsNoOpCastsAndParens(this);
2664 // Temporaries are by definition pr-values of class type.
2665 if (!E->Classify(C).isPRValue()) {
2666 // In this context, property reference is a message call and is pr-value.
2667 if (!isa<ObjCPropertyRefExpr>(E))
2671 // Black-list a few cases which yield pr-values of class type that don't
2672 // refer to temporaries of that type:
2674 // - implicit derived-to-base conversions
2675 if (isa<ImplicitCastExpr>(E)) {
2676 switch (cast<ImplicitCastExpr>(E)->getCastKind()) {
2677 case CK_DerivedToBase:
2678 case CK_UncheckedDerivedToBase:
2685 // - member expressions (all)
2686 if (isa<MemberExpr>(E))
2689 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E))
2690 if (BO->isPtrMemOp())
2693 // - opaque values (all)
2694 if (isa<OpaqueValueExpr>(E))
2700 bool Expr::isImplicitCXXThis() const {
2701 const Expr *E = this;
2703 // Strip away parentheses and casts we don't care about.
2705 if (const ParenExpr *Paren = dyn_cast<ParenExpr>(E)) {
2706 E = Paren->getSubExpr();
2710 if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2711 if (ICE->getCastKind() == CK_NoOp ||
2712 ICE->getCastKind() == CK_LValueToRValue ||
2713 ICE->getCastKind() == CK_DerivedToBase ||
2714 ICE->getCastKind() == CK_UncheckedDerivedToBase) {
2715 E = ICE->getSubExpr();
2720 if (const UnaryOperator* UnOp = dyn_cast<UnaryOperator>(E)) {
2721 if (UnOp->getOpcode() == UO_Extension) {
2722 E = UnOp->getSubExpr();
2727 if (const MaterializeTemporaryExpr *M
2728 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2729 E = M->GetTemporaryExpr();
2736 if (const CXXThisExpr *This = dyn_cast<CXXThisExpr>(E))
2737 return This->isImplicit();
2742 /// hasAnyTypeDependentArguments - Determines if any of the expressions
2743 /// in Exprs is type-dependent.
2744 bool Expr::hasAnyTypeDependentArguments(ArrayRef<Expr *> Exprs) {
2745 for (unsigned I = 0; I < Exprs.size(); ++I)
2746 if (Exprs[I]->isTypeDependent())
2752 bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef,
2753 const Expr **Culprit) const {
2754 // This function is attempting whether an expression is an initializer
2755 // which can be evaluated at compile-time. It very closely parallels
2756 // ConstExprEmitter in CGExprConstant.cpp; if they don't match, it
2757 // will lead to unexpected results. Like ConstExprEmitter, it falls back
2758 // to isEvaluatable most of the time.
2760 // If we ever capture reference-binding directly in the AST, we can
2761 // kill the second parameter.
2765 if (EvaluateAsLValue(Result, Ctx) && !Result.HasSideEffects)
2772 switch (getStmtClass()) {
2774 case StringLiteralClass:
2775 case ObjCEncodeExprClass:
2777 case CXXTemporaryObjectExprClass:
2778 case CXXConstructExprClass: {
2779 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
2781 if (CE->getConstructor()->isTrivial() &&
2782 CE->getConstructor()->getParent()->hasTrivialDestructor()) {
2783 // Trivial default constructor
2784 if (!CE->getNumArgs()) return true;
2786 // Trivial copy constructor
2787 assert(CE->getNumArgs() == 1 && "trivial ctor with > 1 argument");
2788 return CE->getArg(0)->isConstantInitializer(Ctx, false, Culprit);
2793 case CompoundLiteralExprClass: {
2794 // This handles gcc's extension that allows global initializers like
2795 // "struct x {int x;} x = (struct x) {};".
2796 // FIXME: This accepts other cases it shouldn't!
2797 const Expr *Exp = cast<CompoundLiteralExpr>(this)->getInitializer();
2798 return Exp->isConstantInitializer(Ctx, false, Culprit);
2800 case DesignatedInitUpdateExprClass: {
2801 const DesignatedInitUpdateExpr *DIUE = cast<DesignatedInitUpdateExpr>(this);
2802 return DIUE->getBase()->isConstantInitializer(Ctx, false, Culprit) &&
2803 DIUE->getUpdater()->isConstantInitializer(Ctx, false, Culprit);
2805 case InitListExprClass: {
2806 const InitListExpr *ILE = cast<InitListExpr>(this);
2807 if (ILE->getType()->isArrayType()) {
2808 unsigned numInits = ILE->getNumInits();
2809 for (unsigned i = 0; i < numInits; i++) {
2810 if (!ILE->getInit(i)->isConstantInitializer(Ctx, false, Culprit))
2816 if (ILE->getType()->isRecordType()) {
2817 unsigned ElementNo = 0;
2818 RecordDecl *RD = ILE->getType()->getAs<RecordType>()->getDecl();
2819 for (const auto *Field : RD->fields()) {
2820 // If this is a union, skip all the fields that aren't being initialized.
2821 if (RD->isUnion() && ILE->getInitializedFieldInUnion() != Field)
2824 // Don't emit anonymous bitfields, they just affect layout.
2825 if (Field->isUnnamedBitfield())
2828 if (ElementNo < ILE->getNumInits()) {
2829 const Expr *Elt = ILE->getInit(ElementNo++);
2830 if (Field->isBitField()) {
2831 // Bitfields have to evaluate to an integer.
2832 llvm::APSInt ResultTmp;
2833 if (!Elt->EvaluateAsInt(ResultTmp, Ctx)) {
2839 bool RefType = Field->getType()->isReferenceType();
2840 if (!Elt->isConstantInitializer(Ctx, RefType, Culprit))
2850 case ImplicitValueInitExprClass:
2851 case NoInitExprClass:
2853 case ParenExprClass:
2854 return cast<ParenExpr>(this)->getSubExpr()
2855 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2856 case GenericSelectionExprClass:
2857 return cast<GenericSelectionExpr>(this)->getResultExpr()
2858 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2859 case ChooseExprClass:
2860 if (cast<ChooseExpr>(this)->isConditionDependent()) {
2865 return cast<ChooseExpr>(this)->getChosenSubExpr()
2866 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2867 case UnaryOperatorClass: {
2868 const UnaryOperator* Exp = cast<UnaryOperator>(this);
2869 if (Exp->getOpcode() == UO_Extension)
2870 return Exp->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
2873 case CXXFunctionalCastExprClass:
2874 case CXXStaticCastExprClass:
2875 case ImplicitCastExprClass:
2876 case CStyleCastExprClass:
2877 case ObjCBridgedCastExprClass:
2878 case CXXDynamicCastExprClass:
2879 case CXXReinterpretCastExprClass:
2880 case CXXConstCastExprClass: {
2881 const CastExpr *CE = cast<CastExpr>(this);
2883 // Handle misc casts we want to ignore.
2884 if (CE->getCastKind() == CK_NoOp ||
2885 CE->getCastKind() == CK_LValueToRValue ||
2886 CE->getCastKind() == CK_ToUnion ||
2887 CE->getCastKind() == CK_ConstructorConversion ||
2888 CE->getCastKind() == CK_NonAtomicToAtomic ||
2889 CE->getCastKind() == CK_AtomicToNonAtomic)
2890 return CE->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
2894 case MaterializeTemporaryExprClass:
2895 return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
2896 ->isConstantInitializer(Ctx, false, Culprit);
2898 case SubstNonTypeTemplateParmExprClass:
2899 return cast<SubstNonTypeTemplateParmExpr>(this)->getReplacement()
2900 ->isConstantInitializer(Ctx, false, Culprit);
2901 case CXXDefaultArgExprClass:
2902 return cast<CXXDefaultArgExpr>(this)->getExpr()
2903 ->isConstantInitializer(Ctx, false, Culprit);
2904 case CXXDefaultInitExprClass:
2905 return cast<CXXDefaultInitExpr>(this)->getExpr()
2906 ->isConstantInitializer(Ctx, false, Culprit);
2908 // Allow certain forms of UB in constant initializers: signed integer
2909 // overflow and floating-point division by zero. We'll give a warning on
2910 // these, but they're common enough that we have to accept them.
2911 if (isEvaluatable(Ctx, SE_AllowUndefinedBehavior))
2919 /// \brief Look for any side effects within a Stmt.
2920 class SideEffectFinder : public ConstEvaluatedExprVisitor<SideEffectFinder> {
2921 typedef ConstEvaluatedExprVisitor<SideEffectFinder> Inherited;
2922 const bool IncludePossibleEffects;
2923 bool HasSideEffects;
2926 explicit SideEffectFinder(const ASTContext &Context, bool IncludePossible)
2927 : Inherited(Context),
2928 IncludePossibleEffects(IncludePossible), HasSideEffects(false) { }
2930 bool hasSideEffects() const { return HasSideEffects; }
2932 void VisitExpr(const Expr *E) {
2933 if (!HasSideEffects &&
2934 E->HasSideEffects(Context, IncludePossibleEffects))
2935 HasSideEffects = true;
2940 bool Expr::HasSideEffects(const ASTContext &Ctx,
2941 bool IncludePossibleEffects) const {
2942 // In circumstances where we care about definite side effects instead of
2943 // potential side effects, we want to ignore expressions that are part of a
2944 // macro expansion as a potential side effect.
2945 if (!IncludePossibleEffects && getExprLoc().isMacroID())
2948 if (isInstantiationDependent())
2949 return IncludePossibleEffects;
2951 switch (getStmtClass()) {
2953 #define ABSTRACT_STMT(Type)
2954 #define STMT(Type, Base) case Type##Class:
2955 #define EXPR(Type, Base)
2956 #include "clang/AST/StmtNodes.inc"
2957 llvm_unreachable("unexpected Expr kind");
2959 case DependentScopeDeclRefExprClass:
2960 case CXXUnresolvedConstructExprClass:
2961 case CXXDependentScopeMemberExprClass:
2962 case UnresolvedLookupExprClass:
2963 case UnresolvedMemberExprClass:
2964 case PackExpansionExprClass:
2965 case SubstNonTypeTemplateParmPackExprClass:
2966 case FunctionParmPackExprClass:
2968 case CXXFoldExprClass:
2969 llvm_unreachable("shouldn't see dependent / unresolved nodes here");
2971 case DeclRefExprClass:
2972 case ObjCIvarRefExprClass:
2973 case PredefinedExprClass:
2974 case IntegerLiteralClass:
2975 case FloatingLiteralClass:
2976 case ImaginaryLiteralClass:
2977 case StringLiteralClass:
2978 case CharacterLiteralClass:
2979 case OffsetOfExprClass:
2980 case ImplicitValueInitExprClass:
2981 case UnaryExprOrTypeTraitExprClass:
2982 case AddrLabelExprClass:
2983 case GNUNullExprClass:
2984 case NoInitExprClass:
2985 case CXXBoolLiteralExprClass:
2986 case CXXNullPtrLiteralExprClass:
2987 case CXXThisExprClass:
2988 case CXXScalarValueInitExprClass:
2989 case TypeTraitExprClass:
2990 case ArrayTypeTraitExprClass:
2991 case ExpressionTraitExprClass:
2992 case CXXNoexceptExprClass:
2993 case SizeOfPackExprClass:
2994 case ObjCStringLiteralClass:
2995 case ObjCEncodeExprClass:
2996 case ObjCBoolLiteralExprClass:
2997 case CXXUuidofExprClass:
2998 case OpaqueValueExprClass:
2999 // These never have a side-effect.
3003 case CXXOperatorCallExprClass:
3004 case CXXMemberCallExprClass:
3005 case CUDAKernelCallExprClass:
3006 case UserDefinedLiteralClass: {
3007 // We don't know a call definitely has side effects, except for calls
3008 // to pure/const functions that definitely don't.
3009 // If the call itself is considered side-effect free, check the operands.
3010 const Decl *FD = cast<CallExpr>(this)->getCalleeDecl();
3011 bool IsPure = FD && (FD->hasAttr<ConstAttr>() || FD->hasAttr<PureAttr>());
3012 if (IsPure || !IncludePossibleEffects)
3017 case BlockExprClass:
3018 case CXXBindTemporaryExprClass:
3019 if (!IncludePossibleEffects)
3023 case MSPropertyRefExprClass:
3024 case MSPropertySubscriptExprClass:
3025 case CompoundAssignOperatorClass:
3026 case VAArgExprClass:
3027 case AtomicExprClass:
3028 case CXXThrowExprClass:
3029 case CXXNewExprClass:
3030 case CXXDeleteExprClass:
3031 case ExprWithCleanupsClass:
3032 case CoawaitExprClass:
3033 case CoyieldExprClass:
3034 // These always have a side-effect.
3037 case StmtExprClass: {
3038 // StmtExprs have a side-effect if any substatement does.
3039 SideEffectFinder Finder(Ctx, IncludePossibleEffects);
3040 Finder.Visit(cast<StmtExpr>(this)->getSubStmt());
3041 return Finder.hasSideEffects();
3044 case ParenExprClass:
3045 case ArraySubscriptExprClass:
3046 case OMPArraySectionExprClass:
3047 case MemberExprClass:
3048 case ConditionalOperatorClass:
3049 case BinaryConditionalOperatorClass:
3050 case CompoundLiteralExprClass:
3051 case ExtVectorElementExprClass:
3052 case DesignatedInitExprClass:
3053 case DesignatedInitUpdateExprClass:
3054 case ParenListExprClass:
3055 case CXXPseudoDestructorExprClass:
3056 case CXXStdInitializerListExprClass:
3057 case SubstNonTypeTemplateParmExprClass:
3058 case MaterializeTemporaryExprClass:
3059 case ShuffleVectorExprClass:
3060 case ConvertVectorExprClass:
3061 case AsTypeExprClass:
3062 // These have a side-effect if any subexpression does.
3065 case UnaryOperatorClass:
3066 if (cast<UnaryOperator>(this)->isIncrementDecrementOp())
3070 case BinaryOperatorClass:
3071 if (cast<BinaryOperator>(this)->isAssignmentOp())
3075 case InitListExprClass:
3076 // FIXME: The children for an InitListExpr doesn't include the array filler.
3077 if (const Expr *E = cast<InitListExpr>(this)->getArrayFiller())
3078 if (E->HasSideEffects(Ctx, IncludePossibleEffects))
3082 case GenericSelectionExprClass:
3083 return cast<GenericSelectionExpr>(this)->getResultExpr()->
3084 HasSideEffects(Ctx, IncludePossibleEffects);
3086 case ChooseExprClass:
3087 return cast<ChooseExpr>(this)->getChosenSubExpr()->HasSideEffects(
3088 Ctx, IncludePossibleEffects);
3090 case CXXDefaultArgExprClass:
3091 return cast<CXXDefaultArgExpr>(this)->getExpr()->HasSideEffects(
3092 Ctx, IncludePossibleEffects);
3094 case CXXDefaultInitExprClass: {
3095 const FieldDecl *FD = cast<CXXDefaultInitExpr>(this)->getField();
3096 if (const Expr *E = FD->getInClassInitializer())
3097 return E->HasSideEffects(Ctx, IncludePossibleEffects);
3098 // If we've not yet parsed the initializer, assume it has side-effects.
3102 case CXXDynamicCastExprClass: {
3103 // A dynamic_cast expression has side-effects if it can throw.
3104 const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(this);
3105 if (DCE->getTypeAsWritten()->isReferenceType() &&
3106 DCE->getCastKind() == CK_Dynamic)
3109 case ImplicitCastExprClass:
3110 case CStyleCastExprClass:
3111 case CXXStaticCastExprClass:
3112 case CXXReinterpretCastExprClass:
3113 case CXXConstCastExprClass:
3114 case CXXFunctionalCastExprClass: {
3115 // While volatile reads are side-effecting in both C and C++, we treat them
3116 // as having possible (not definite) side-effects. This allows idiomatic
3117 // code to behave without warning, such as sizeof(*v) for a volatile-
3118 // qualified pointer.
3119 if (!IncludePossibleEffects)
3122 const CastExpr *CE = cast<CastExpr>(this);
3123 if (CE->getCastKind() == CK_LValueToRValue &&
3124 CE->getSubExpr()->getType().isVolatileQualified())
3129 case CXXTypeidExprClass:
3130 // typeid might throw if its subexpression is potentially-evaluated, so has
3131 // side-effects in that case whether or not its subexpression does.
3132 return cast<CXXTypeidExpr>(this)->isPotentiallyEvaluated();
3134 case CXXConstructExprClass:
3135 case CXXTemporaryObjectExprClass: {
3136 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
3137 if (!CE->getConstructor()->isTrivial() && IncludePossibleEffects)
3139 // A trivial constructor does not add any side-effects of its own. Just look
3140 // at its arguments.
3144 case LambdaExprClass: {
3145 const LambdaExpr *LE = cast<LambdaExpr>(this);
3146 for (LambdaExpr::capture_iterator I = LE->capture_begin(),
3147 E = LE->capture_end(); I != E; ++I)
3148 if (I->getCaptureKind() == LCK_ByCopy)
3149 // FIXME: Only has a side-effect if the variable is volatile or if
3150 // the copy would invoke a non-trivial copy constructor.
3155 case PseudoObjectExprClass: {
3156 // Only look for side-effects in the semantic form, and look past
3157 // OpaqueValueExpr bindings in that form.
3158 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
3159 for (PseudoObjectExpr::const_semantics_iterator I = PO->semantics_begin(),
3160 E = PO->semantics_end();
3162 const Expr *Subexpr = *I;
3163 if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(Subexpr))
3164 Subexpr = OVE->getSourceExpr();
3165 if (Subexpr->HasSideEffects(Ctx, IncludePossibleEffects))
3171 case ObjCBoxedExprClass:
3172 case ObjCArrayLiteralClass:
3173 case ObjCDictionaryLiteralClass:
3174 case ObjCSelectorExprClass:
3175 case ObjCProtocolExprClass:
3176 case ObjCIsaExprClass:
3177 case ObjCIndirectCopyRestoreExprClass:
3178 case ObjCSubscriptRefExprClass:
3179 case ObjCBridgedCastExprClass:
3180 case ObjCMessageExprClass:
3181 case ObjCPropertyRefExprClass:
3182 // FIXME: Classify these cases better.
3183 if (IncludePossibleEffects)
3188 // Recurse to children.
3189 for (const Stmt *SubStmt : children())
3191 cast<Expr>(SubStmt)->HasSideEffects(Ctx, IncludePossibleEffects))
3198 /// \brief Look for a call to a non-trivial function within an expression.
3199 class NonTrivialCallFinder : public ConstEvaluatedExprVisitor<NonTrivialCallFinder>
3201 typedef ConstEvaluatedExprVisitor<NonTrivialCallFinder> Inherited;
3206 explicit NonTrivialCallFinder(const ASTContext &Context)
3207 : Inherited(Context), NonTrivial(false) { }
3209 bool hasNonTrivialCall() const { return NonTrivial; }
3211 void VisitCallExpr(const CallExpr *E) {
3212 if (const CXXMethodDecl *Method
3213 = dyn_cast_or_null<const CXXMethodDecl>(E->getCalleeDecl())) {
3214 if (Method->isTrivial()) {
3215 // Recurse to children of the call.
3216 Inherited::VisitStmt(E);
3224 void VisitCXXConstructExpr(const CXXConstructExpr *E) {
3225 if (E->getConstructor()->isTrivial()) {
3226 // Recurse to children of the call.
3227 Inherited::VisitStmt(E);
3234 void VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *E) {
3235 if (E->getTemporary()->getDestructor()->isTrivial()) {
3236 Inherited::VisitStmt(E);
3245 bool Expr::hasNonTrivialCall(const ASTContext &Ctx) const {
3246 NonTrivialCallFinder Finder(Ctx);
3248 return Finder.hasNonTrivialCall();
3251 /// isNullPointerConstant - C99 6.3.2.3p3 - Return whether this is a null
3252 /// pointer constant or not, as well as the specific kind of constant detected.
3253 /// Null pointer constants can be integer constant expressions with the
3254 /// value zero, casts of zero to void*, nullptr (C++0X), or __null
3255 /// (a GNU extension).
3256 Expr::NullPointerConstantKind
3257 Expr::isNullPointerConstant(ASTContext &Ctx,
3258 NullPointerConstantValueDependence NPC) const {
3259 if (isValueDependent() &&
3260 (!Ctx.getLangOpts().CPlusPlus11 || Ctx.getLangOpts().MSVCCompat)) {
3262 case NPC_NeverValueDependent:
3263 llvm_unreachable("Unexpected value dependent expression!");
3264 case NPC_ValueDependentIsNull:
3265 if (isTypeDependent() || getType()->isIntegralType(Ctx))
3266 return NPCK_ZeroExpression;
3268 return NPCK_NotNull;
3270 case NPC_ValueDependentIsNotNull:
3271 return NPCK_NotNull;
3275 // Strip off a cast to void*, if it exists. Except in C++.
3276 if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) {
3277 if (!Ctx.getLangOpts().CPlusPlus) {
3278 // Check that it is a cast to void*.
3279 if (const PointerType *PT = CE->getType()->getAs<PointerType>()) {
3280 QualType Pointee = PT->getPointeeType();
3281 Qualifiers Q = Pointee.getQualifiers();
3282 // In OpenCL v2.0 generic address space acts as a placeholder
3283 // and should be ignored.
3284 bool IsASValid = true;
3285 if (Ctx.getLangOpts().OpenCLVersion >= 200) {
3286 if (Pointee.getAddressSpace() == LangAS::opencl_generic)
3287 Q.removeAddressSpace();
3292 if (IsASValid && !Q.hasQualifiers() &&
3293 Pointee->isVoidType() && // to void*
3294 CE->getSubExpr()->getType()->isIntegerType()) // from int.
3295 return CE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3298 } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) {
3299 // Ignore the ImplicitCastExpr type entirely.
3300 return ICE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3301 } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) {
3302 // Accept ((void*)0) as a null pointer constant, as many other
3303 // implementations do.
3304 return PE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3305 } else if (const GenericSelectionExpr *GE =
3306 dyn_cast<GenericSelectionExpr>(this)) {
3307 if (GE->isResultDependent())
3308 return NPCK_NotNull;
3309 return GE->getResultExpr()->isNullPointerConstant(Ctx, NPC);
3310 } else if (const ChooseExpr *CE = dyn_cast<ChooseExpr>(this)) {
3311 if (CE->isConditionDependent())
3312 return NPCK_NotNull;
3313 return CE->getChosenSubExpr()->isNullPointerConstant(Ctx, NPC);
3314 } else if (const CXXDefaultArgExpr *DefaultArg
3315 = dyn_cast<CXXDefaultArgExpr>(this)) {
3316 // See through default argument expressions.
3317 return DefaultArg->getExpr()->isNullPointerConstant(Ctx, NPC);
3318 } else if (const CXXDefaultInitExpr *DefaultInit
3319 = dyn_cast<CXXDefaultInitExpr>(this)) {
3320 // See through default initializer expressions.
3321 return DefaultInit->getExpr()->isNullPointerConstant(Ctx, NPC);
3322 } else if (isa<GNUNullExpr>(this)) {
3323 // The GNU __null extension is always a null pointer constant.
3324 return NPCK_GNUNull;
3325 } else if (const MaterializeTemporaryExpr *M
3326 = dyn_cast<MaterializeTemporaryExpr>(this)) {
3327 return M->GetTemporaryExpr()->isNullPointerConstant(Ctx, NPC);
3328 } else if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(this)) {
3329 if (const Expr *Source = OVE->getSourceExpr())
3330 return Source->isNullPointerConstant(Ctx, NPC);
3333 // C++11 nullptr_t is always a null pointer constant.
3334 if (getType()->isNullPtrType())
3335 return NPCK_CXX11_nullptr;
3337 if (const RecordType *UT = getType()->getAsUnionType())
3338 if (!Ctx.getLangOpts().CPlusPlus11 &&
3339 UT && UT->getDecl()->hasAttr<TransparentUnionAttr>())
3340 if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(this)){
3341 const Expr *InitExpr = CLE->getInitializer();
3342 if (const InitListExpr *ILE = dyn_cast<InitListExpr>(InitExpr))
3343 return ILE->getInit(0)->isNullPointerConstant(Ctx, NPC);
3345 // This expression must be an integer type.
3346 if (!getType()->isIntegerType() ||
3347 (Ctx.getLangOpts().CPlusPlus && getType()->isEnumeralType()))
3348 return NPCK_NotNull;
3350 if (Ctx.getLangOpts().CPlusPlus11) {
3351 // C++11 [conv.ptr]p1: A null pointer constant is an integer literal with
3352 // value zero or a prvalue of type std::nullptr_t.
3353 // Microsoft mode permits C++98 rules reflecting MSVC behavior.
3354 const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(this);
3355 if (Lit && !Lit->getValue())
3356 return NPCK_ZeroLiteral;
3357 else if (!Ctx.getLangOpts().MSVCCompat || !isCXX98IntegralConstantExpr(Ctx))
3358 return NPCK_NotNull;
3360 // If we have an integer constant expression, we need to *evaluate* it and
3361 // test for the value 0.
3362 if (!isIntegerConstantExpr(Ctx))
3363 return NPCK_NotNull;
3366 if (EvaluateKnownConstInt(Ctx) != 0)
3367 return NPCK_NotNull;
3369 if (isa<IntegerLiteral>(this))
3370 return NPCK_ZeroLiteral;
3371 return NPCK_ZeroExpression;
3374 /// \brief If this expression is an l-value for an Objective C
3375 /// property, find the underlying property reference expression.
3376 const ObjCPropertyRefExpr *Expr::getObjCProperty() const {
3377 const Expr *E = this;
3379 assert((E->getValueKind() == VK_LValue &&
3380 E->getObjectKind() == OK_ObjCProperty) &&
3381 "expression is not a property reference");
3382 E = E->IgnoreParenCasts();
3383 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
3384 if (BO->getOpcode() == BO_Comma) {
3393 return cast<ObjCPropertyRefExpr>(E);
3396 bool Expr::isObjCSelfExpr() const {
3397 const Expr *E = IgnoreParenImpCasts();
3399 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E);
3403 const ImplicitParamDecl *Param = dyn_cast<ImplicitParamDecl>(DRE->getDecl());
3407 const ObjCMethodDecl *M = dyn_cast<ObjCMethodDecl>(Param->getDeclContext());
3411 return M->getSelfDecl() == Param;
3414 FieldDecl *Expr::getSourceBitField() {
3415 Expr *E = this->IgnoreParens();
3417 while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3418 if (ICE->getCastKind() == CK_LValueToRValue ||
3419 (ICE->getValueKind() != VK_RValue && ICE->getCastKind() == CK_NoOp))
3420 E = ICE->getSubExpr()->IgnoreParens();
3425 if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E))
3426 if (FieldDecl *Field = dyn_cast<FieldDecl>(MemRef->getMemberDecl()))
3427 if (Field->isBitField())
3430 if (ObjCIvarRefExpr *IvarRef = dyn_cast<ObjCIvarRefExpr>(E))
3431 if (FieldDecl *Ivar = dyn_cast<FieldDecl>(IvarRef->getDecl()))
3432 if (Ivar->isBitField())
3435 if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E))
3436 if (FieldDecl *Field = dyn_cast<FieldDecl>(DeclRef->getDecl()))
3437 if (Field->isBitField())
3440 if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(E)) {
3441 if (BinOp->isAssignmentOp() && BinOp->getLHS())
3442 return BinOp->getLHS()->getSourceBitField();
3444 if (BinOp->getOpcode() == BO_Comma && BinOp->getRHS())
3445 return BinOp->getRHS()->getSourceBitField();
3448 if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(E))
3449 if (UnOp->isPrefix() && UnOp->isIncrementDecrementOp())
3450 return UnOp->getSubExpr()->getSourceBitField();
3455 bool Expr::refersToVectorElement() const {
3456 const Expr *E = this->IgnoreParens();
3458 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3459 if (ICE->getValueKind() != VK_RValue &&
3460 ICE->getCastKind() == CK_NoOp)
3461 E = ICE->getSubExpr()->IgnoreParens();
3466 if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E))
3467 return ASE->getBase()->getType()->isVectorType();
3469 if (isa<ExtVectorElementExpr>(E))
3475 bool Expr::refersToGlobalRegisterVar() const {
3476 const Expr *E = this->IgnoreParenImpCasts();
3478 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
3479 if (const auto *VD = dyn_cast<VarDecl>(DRE->getDecl()))
3480 if (VD->getStorageClass() == SC_Register &&
3481 VD->hasAttr<AsmLabelAttr>() && !VD->isLocalVarDecl())
3487 /// isArrow - Return true if the base expression is a pointer to vector,
3488 /// return false if the base expression is a vector.
3489 bool ExtVectorElementExpr::isArrow() const {
3490 return getBase()->getType()->isPointerType();
3493 unsigned ExtVectorElementExpr::getNumElements() const {
3494 if (const VectorType *VT = getType()->getAs<VectorType>())
3495 return VT->getNumElements();
3499 /// containsDuplicateElements - Return true if any element access is repeated.
3500 bool ExtVectorElementExpr::containsDuplicateElements() const {
3501 // FIXME: Refactor this code to an accessor on the AST node which returns the
3502 // "type" of component access, and share with code below and in Sema.
3503 StringRef Comp = Accessor->getName();
3505 // Halving swizzles do not contain duplicate elements.
3506 if (Comp == "hi" || Comp == "lo" || Comp == "even" || Comp == "odd")
3509 // Advance past s-char prefix on hex swizzles.
3510 if (Comp[0] == 's' || Comp[0] == 'S')
3511 Comp = Comp.substr(1);
3513 for (unsigned i = 0, e = Comp.size(); i != e; ++i)
3514 if (Comp.substr(i + 1).find(Comp[i]) != StringRef::npos)
3520 /// getEncodedElementAccess - We encode the fields as a llvm ConstantArray.
3521 void ExtVectorElementExpr::getEncodedElementAccess(
3522 SmallVectorImpl<uint32_t> &Elts) const {
3523 StringRef Comp = Accessor->getName();
3524 if (Comp[0] == 's' || Comp[0] == 'S')
3525 Comp = Comp.substr(1);
3527 bool isHi = Comp == "hi";
3528 bool isLo = Comp == "lo";
3529 bool isEven = Comp == "even";
3530 bool isOdd = Comp == "odd";
3532 for (unsigned i = 0, e = getNumElements(); i != e; ++i) {
3544 Index = ExtVectorType::getAccessorIdx(Comp[i]);
3546 Elts.push_back(Index);
3550 ShuffleVectorExpr::ShuffleVectorExpr(const ASTContext &C, ArrayRef<Expr*> args,
3551 QualType Type, SourceLocation BLoc,
3553 : Expr(ShuffleVectorExprClass, Type, VK_RValue, OK_Ordinary,
3554 Type->isDependentType(), Type->isDependentType(),
3555 Type->isInstantiationDependentType(),
3556 Type->containsUnexpandedParameterPack()),
3557 BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(args.size())
3559 SubExprs = new (C) Stmt*[args.size()];
3560 for (unsigned i = 0; i != args.size(); i++) {
3561 if (args[i]->isTypeDependent())
3562 ExprBits.TypeDependent = true;
3563 if (args[i]->isValueDependent())
3564 ExprBits.ValueDependent = true;
3565 if (args[i]->isInstantiationDependent())
3566 ExprBits.InstantiationDependent = true;
3567 if (args[i]->containsUnexpandedParameterPack())
3568 ExprBits.ContainsUnexpandedParameterPack = true;
3570 SubExprs[i] = args[i];
3574 void ShuffleVectorExpr::setExprs(const ASTContext &C, ArrayRef<Expr *> Exprs) {
3575 if (SubExprs) C.Deallocate(SubExprs);
3577 this->NumExprs = Exprs.size();
3578 SubExprs = new (C) Stmt*[NumExprs];
3579 memcpy(SubExprs, Exprs.data(), sizeof(Expr *) * Exprs.size());
3582 GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
3583 SourceLocation GenericLoc, Expr *ControllingExpr,
3584 ArrayRef<TypeSourceInfo*> AssocTypes,
3585 ArrayRef<Expr*> AssocExprs,
3586 SourceLocation DefaultLoc,
3587 SourceLocation RParenLoc,
3588 bool ContainsUnexpandedParameterPack,
3589 unsigned ResultIndex)
3590 : Expr(GenericSelectionExprClass,
3591 AssocExprs[ResultIndex]->getType(),
3592 AssocExprs[ResultIndex]->getValueKind(),
3593 AssocExprs[ResultIndex]->getObjectKind(),
3594 AssocExprs[ResultIndex]->isTypeDependent(),
3595 AssocExprs[ResultIndex]->isValueDependent(),
3596 AssocExprs[ResultIndex]->isInstantiationDependent(),
3597 ContainsUnexpandedParameterPack),
3598 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3599 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3600 NumAssocs(AssocExprs.size()), ResultIndex(ResultIndex),
3601 GenericLoc(GenericLoc), DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3602 SubExprs[CONTROLLING] = ControllingExpr;
3603 assert(AssocTypes.size() == AssocExprs.size());
3604 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3605 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3608 GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
3609 SourceLocation GenericLoc, Expr *ControllingExpr,
3610 ArrayRef<TypeSourceInfo*> AssocTypes,
3611 ArrayRef<Expr*> AssocExprs,
3612 SourceLocation DefaultLoc,
3613 SourceLocation RParenLoc,
3614 bool ContainsUnexpandedParameterPack)
3615 : Expr(GenericSelectionExprClass,
3616 Context.DependentTy,
3619 /*isTypeDependent=*/true,
3620 /*isValueDependent=*/true,
3621 /*isInstantiationDependent=*/true,
3622 ContainsUnexpandedParameterPack),
3623 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3624 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3625 NumAssocs(AssocExprs.size()), ResultIndex(-1U), GenericLoc(GenericLoc),
3626 DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3627 SubExprs[CONTROLLING] = ControllingExpr;
3628 assert(AssocTypes.size() == AssocExprs.size());
3629 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3630 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3633 //===----------------------------------------------------------------------===//
3634 // DesignatedInitExpr
3635 //===----------------------------------------------------------------------===//
3637 IdentifierInfo *DesignatedInitExpr::Designator::getFieldName() const {
3638 assert(Kind == FieldDesignator && "Only valid on a field designator");
3639 if (Field.NameOrField & 0x01)
3640 return reinterpret_cast<IdentifierInfo *>(Field.NameOrField&~0x01);
3642 return getField()->getIdentifier();
3645 DesignatedInitExpr::DesignatedInitExpr(const ASTContext &C, QualType Ty,
3646 unsigned NumDesignators,
3647 const Designator *Designators,
3648 SourceLocation EqualOrColonLoc,
3650 ArrayRef<Expr*> IndexExprs,
3652 : Expr(DesignatedInitExprClass, Ty,
3653 Init->getValueKind(), Init->getObjectKind(),
3654 Init->isTypeDependent(), Init->isValueDependent(),
3655 Init->isInstantiationDependent(),
3656 Init->containsUnexpandedParameterPack()),
3657 EqualOrColonLoc(EqualOrColonLoc), GNUSyntax(GNUSyntax),
3658 NumDesignators(NumDesignators), NumSubExprs(IndexExprs.size() + 1) {
3659 this->Designators = new (C) Designator[NumDesignators];
3661 // Record the initializer itself.
3662 child_iterator Child = child_begin();
3665 // Copy the designators and their subexpressions, computing
3666 // value-dependence along the way.
3667 unsigned IndexIdx = 0;
3668 for (unsigned I = 0; I != NumDesignators; ++I) {
3669 this->Designators[I] = Designators[I];
3671 if (this->Designators[I].isArrayDesignator()) {
3672 // Compute type- and value-dependence.
3673 Expr *Index = IndexExprs[IndexIdx];
3674 if (Index->isTypeDependent() || Index->isValueDependent())
3675 ExprBits.TypeDependent = ExprBits.ValueDependent = true;
3676 if (Index->isInstantiationDependent())
3677 ExprBits.InstantiationDependent = true;
3678 // Propagate unexpanded parameter packs.
3679 if (Index->containsUnexpandedParameterPack())
3680 ExprBits.ContainsUnexpandedParameterPack = true;
3682 // Copy the index expressions into permanent storage.
3683 *Child++ = IndexExprs[IndexIdx++];
3684 } else if (this->Designators[I].isArrayRangeDesignator()) {
3685 // Compute type- and value-dependence.
3686 Expr *Start = IndexExprs[IndexIdx];
3687 Expr *End = IndexExprs[IndexIdx + 1];
3688 if (Start->isTypeDependent() || Start->isValueDependent() ||
3689 End->isTypeDependent() || End->isValueDependent()) {
3690 ExprBits.TypeDependent = ExprBits.ValueDependent = true;
3691 ExprBits.InstantiationDependent = true;
3692 } else if (Start->isInstantiationDependent() ||
3693 End->isInstantiationDependent()) {
3694 ExprBits.InstantiationDependent = true;
3697 // Propagate unexpanded parameter packs.
3698 if (Start->containsUnexpandedParameterPack() ||
3699 End->containsUnexpandedParameterPack())
3700 ExprBits.ContainsUnexpandedParameterPack = true;
3702 // Copy the start/end expressions into permanent storage.
3703 *Child++ = IndexExprs[IndexIdx++];
3704 *Child++ = IndexExprs[IndexIdx++];
3708 assert(IndexIdx == IndexExprs.size() && "Wrong number of index expressions");
3711 DesignatedInitExpr *
3712 DesignatedInitExpr::Create(const ASTContext &C, Designator *Designators,
3713 unsigned NumDesignators,
3714 ArrayRef<Expr*> IndexExprs,
3715 SourceLocation ColonOrEqualLoc,
3716 bool UsesColonSyntax, Expr *Init) {
3717 void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(IndexExprs.size() + 1),
3718 llvm::alignOf<DesignatedInitExpr>());
3719 return new (Mem) DesignatedInitExpr(C, C.VoidTy, NumDesignators, Designators,
3720 ColonOrEqualLoc, UsesColonSyntax,
3724 DesignatedInitExpr *DesignatedInitExpr::CreateEmpty(const ASTContext &C,
3725 unsigned NumIndexExprs) {
3726 void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(NumIndexExprs + 1),
3727 llvm::alignOf<DesignatedInitExpr>());
3728 return new (Mem) DesignatedInitExpr(NumIndexExprs + 1);
3731 void DesignatedInitExpr::setDesignators(const ASTContext &C,
3732 const Designator *Desigs,
3733 unsigned NumDesigs) {
3734 Designators = new (C) Designator[NumDesigs];
3735 NumDesignators = NumDesigs;
3736 for (unsigned I = 0; I != NumDesigs; ++I)
3737 Designators[I] = Desigs[I];
3740 SourceRange DesignatedInitExpr::getDesignatorsSourceRange() const {
3741 DesignatedInitExpr *DIE = const_cast<DesignatedInitExpr*>(this);
3743 return DIE->getDesignator(0)->getSourceRange();
3744 return SourceRange(DIE->getDesignator(0)->getLocStart(),
3745 DIE->getDesignator(size()-1)->getLocEnd());
3748 SourceLocation DesignatedInitExpr::getLocStart() const {
3749 SourceLocation StartLoc;
3751 *const_cast<DesignatedInitExpr*>(this)->designators_begin();
3752 if (First.isFieldDesignator()) {
3754 StartLoc = SourceLocation::getFromRawEncoding(First.Field.FieldLoc);
3756 StartLoc = SourceLocation::getFromRawEncoding(First.Field.DotLoc);
3759 SourceLocation::getFromRawEncoding(First.ArrayOrRange.LBracketLoc);
3763 SourceLocation DesignatedInitExpr::getLocEnd() const {
3764 return getInit()->getLocEnd();
3767 Expr *DesignatedInitExpr::getArrayIndex(const Designator& D) const {
3768 assert(D.Kind == Designator::ArrayDesignator && "Requires array designator");
3769 return getSubExpr(D.ArrayOrRange.Index + 1);
3772 Expr *DesignatedInitExpr::getArrayRangeStart(const Designator &D) const {
3773 assert(D.Kind == Designator::ArrayRangeDesignator &&
3774 "Requires array range designator");
3775 return getSubExpr(D.ArrayOrRange.Index + 1);
3778 Expr *DesignatedInitExpr::getArrayRangeEnd(const Designator &D) const {
3779 assert(D.Kind == Designator::ArrayRangeDesignator &&
3780 "Requires array range designator");
3781 return getSubExpr(D.ArrayOrRange.Index + 2);
3784 /// \brief Replaces the designator at index @p Idx with the series
3785 /// of designators in [First, Last).
3786 void DesignatedInitExpr::ExpandDesignator(const ASTContext &C, unsigned Idx,
3787 const Designator *First,
3788 const Designator *Last) {
3789 unsigned NumNewDesignators = Last - First;
3790 if (NumNewDesignators == 0) {
3791 std::copy_backward(Designators + Idx + 1,
3792 Designators + NumDesignators,
3794 --NumNewDesignators;
3796 } else if (NumNewDesignators == 1) {
3797 Designators[Idx] = *First;
3801 Designator *NewDesignators
3802 = new (C) Designator[NumDesignators - 1 + NumNewDesignators];
3803 std::copy(Designators, Designators + Idx, NewDesignators);
3804 std::copy(First, Last, NewDesignators + Idx);
3805 std::copy(Designators + Idx + 1, Designators + NumDesignators,
3806 NewDesignators + Idx + NumNewDesignators);
3807 Designators = NewDesignators;
3808 NumDesignators = NumDesignators - 1 + NumNewDesignators;
3811 DesignatedInitUpdateExpr::DesignatedInitUpdateExpr(const ASTContext &C,
3812 SourceLocation lBraceLoc, Expr *baseExpr, SourceLocation rBraceLoc)
3813 : Expr(DesignatedInitUpdateExprClass, baseExpr->getType(), VK_RValue,
3814 OK_Ordinary, false, false, false, false) {
3815 BaseAndUpdaterExprs[0] = baseExpr;
3817 InitListExpr *ILE = new (C) InitListExpr(C, lBraceLoc, None, rBraceLoc);
3818 ILE->setType(baseExpr->getType());
3819 BaseAndUpdaterExprs[1] = ILE;
3822 SourceLocation DesignatedInitUpdateExpr::getLocStart() const {
3823 return getBase()->getLocStart();
3826 SourceLocation DesignatedInitUpdateExpr::getLocEnd() const {
3827 return getBase()->getLocEnd();
3830 ParenListExpr::ParenListExpr(const ASTContext& C, SourceLocation lparenloc,
3831 ArrayRef<Expr*> exprs,
3832 SourceLocation rparenloc)
3833 : Expr(ParenListExprClass, QualType(), VK_RValue, OK_Ordinary,
3834 false, false, false, false),
3835 NumExprs(exprs.size()), LParenLoc(lparenloc), RParenLoc(rparenloc) {
3836 Exprs = new (C) Stmt*[exprs.size()];
3837 for (unsigned i = 0; i != exprs.size(); ++i) {
3838 if (exprs[i]->isTypeDependent())
3839 ExprBits.TypeDependent = true;
3840 if (exprs[i]->isValueDependent())
3841 ExprBits.ValueDependent = true;
3842 if (exprs[i]->isInstantiationDependent())
3843 ExprBits.InstantiationDependent = true;
3844 if (exprs[i]->containsUnexpandedParameterPack())
3845 ExprBits.ContainsUnexpandedParameterPack = true;
3847 Exprs[i] = exprs[i];
3851 const OpaqueValueExpr *OpaqueValueExpr::findInCopyConstruct(const Expr *e) {
3852 if (const ExprWithCleanups *ewc = dyn_cast<ExprWithCleanups>(e))
3853 e = ewc->getSubExpr();
3854 if (const MaterializeTemporaryExpr *m = dyn_cast<MaterializeTemporaryExpr>(e))
3855 e = m->GetTemporaryExpr();
3856 e = cast<CXXConstructExpr>(e)->getArg(0);
3857 while (const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(e))
3858 e = ice->getSubExpr();
3859 return cast<OpaqueValueExpr>(e);
3862 PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &Context,
3864 unsigned numSemanticExprs) {
3866 Context.Allocate(totalSizeToAlloc<Expr *>(1 + numSemanticExprs),
3867 llvm::alignOf<PseudoObjectExpr>());
3868 return new(buffer) PseudoObjectExpr(sh, numSemanticExprs);
3871 PseudoObjectExpr::PseudoObjectExpr(EmptyShell shell, unsigned numSemanticExprs)
3872 : Expr(PseudoObjectExprClass, shell) {
3873 PseudoObjectExprBits.NumSubExprs = numSemanticExprs + 1;
3876 PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &C, Expr *syntax,
3877 ArrayRef<Expr*> semantics,
3878 unsigned resultIndex) {
3879 assert(syntax && "no syntactic expression!");
3880 assert(semantics.size() && "no semantic expressions!");
3884 if (resultIndex == NoResult) {
3888 assert(resultIndex < semantics.size());
3889 type = semantics[resultIndex]->getType();
3890 VK = semantics[resultIndex]->getValueKind();
3891 assert(semantics[resultIndex]->getObjectKind() == OK_Ordinary);
3894 void *buffer = C.Allocate(totalSizeToAlloc<Expr *>(semantics.size() + 1),
3895 llvm::alignOf<PseudoObjectExpr>());
3896 return new(buffer) PseudoObjectExpr(type, VK, syntax, semantics,
3900 PseudoObjectExpr::PseudoObjectExpr(QualType type, ExprValueKind VK,
3901 Expr *syntax, ArrayRef<Expr*> semantics,
3902 unsigned resultIndex)
3903 : Expr(PseudoObjectExprClass, type, VK, OK_Ordinary,
3904 /*filled in at end of ctor*/ false, false, false, false) {
3905 PseudoObjectExprBits.NumSubExprs = semantics.size() + 1;
3906 PseudoObjectExprBits.ResultIndex = resultIndex + 1;
3908 for (unsigned i = 0, e = semantics.size() + 1; i != e; ++i) {
3909 Expr *E = (i == 0 ? syntax : semantics[i-1]);
3910 getSubExprsBuffer()[i] = E;
3912 if (E->isTypeDependent())
3913 ExprBits.TypeDependent = true;
3914 if (E->isValueDependent())
3915 ExprBits.ValueDependent = true;
3916 if (E->isInstantiationDependent())
3917 ExprBits.InstantiationDependent = true;
3918 if (E->containsUnexpandedParameterPack())
3919 ExprBits.ContainsUnexpandedParameterPack = true;
3921 if (isa<OpaqueValueExpr>(E))
3922 assert(cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr &&
3923 "opaque-value semantic expressions for pseudo-object "
3924 "operations must have sources");
3928 //===----------------------------------------------------------------------===//
3929 // Child Iterators for iterating over subexpressions/substatements
3930 //===----------------------------------------------------------------------===//
3932 // UnaryExprOrTypeTraitExpr
3933 Stmt::child_range UnaryExprOrTypeTraitExpr::children() {
3934 // If this is of a type and the type is a VLA type (and not a typedef), the
3935 // size expression of the VLA needs to be treated as an executable expression.
3936 // Why isn't this weirdness documented better in StmtIterator?
3937 if (isArgumentType()) {
3938 if (const VariableArrayType* T = dyn_cast<VariableArrayType>(
3939 getArgumentType().getTypePtr()))
3940 return child_range(child_iterator(T), child_iterator());
3941 return child_range(child_iterator(), child_iterator());
3943 return child_range(&Argument.Ex, &Argument.Ex + 1);
3946 AtomicExpr::AtomicExpr(SourceLocation BLoc, ArrayRef<Expr*> args,
3947 QualType t, AtomicOp op, SourceLocation RP)
3948 : Expr(AtomicExprClass, t, VK_RValue, OK_Ordinary,
3949 false, false, false, false),
3950 NumSubExprs(args.size()), BuiltinLoc(BLoc), RParenLoc(RP), Op(op)
3952 assert(args.size() == getNumSubExprs(op) && "wrong number of subexpressions");
3953 for (unsigned i = 0; i != args.size(); i++) {
3954 if (args[i]->isTypeDependent())
3955 ExprBits.TypeDependent = true;
3956 if (args[i]->isValueDependent())
3957 ExprBits.ValueDependent = true;
3958 if (args[i]->isInstantiationDependent())
3959 ExprBits.InstantiationDependent = true;
3960 if (args[i]->containsUnexpandedParameterPack())
3961 ExprBits.ContainsUnexpandedParameterPack = true;
3963 SubExprs[i] = args[i];
3967 unsigned AtomicExpr::getNumSubExprs(AtomicOp Op) {
3969 case AO__c11_atomic_init:
3970 case AO__c11_atomic_load:
3971 case AO__atomic_load_n:
3974 case AO__c11_atomic_store:
3975 case AO__c11_atomic_exchange:
3976 case AO__atomic_load:
3977 case AO__atomic_store:
3978 case AO__atomic_store_n:
3979 case AO__atomic_exchange_n:
3980 case AO__c11_atomic_fetch_add:
3981 case AO__c11_atomic_fetch_sub:
3982 case AO__c11_atomic_fetch_and:
3983 case AO__c11_atomic_fetch_or:
3984 case AO__c11_atomic_fetch_xor:
3985 case AO__atomic_fetch_add:
3986 case AO__atomic_fetch_sub:
3987 case AO__atomic_fetch_and:
3988 case AO__atomic_fetch_or:
3989 case AO__atomic_fetch_xor:
3990 case AO__atomic_fetch_nand:
3991 case AO__atomic_add_fetch:
3992 case AO__atomic_sub_fetch:
3993 case AO__atomic_and_fetch:
3994 case AO__atomic_or_fetch:
3995 case AO__atomic_xor_fetch:
3996 case AO__atomic_nand_fetch:
3999 case AO__atomic_exchange:
4002 case AO__c11_atomic_compare_exchange_strong:
4003 case AO__c11_atomic_compare_exchange_weak:
4006 case AO__atomic_compare_exchange:
4007 case AO__atomic_compare_exchange_n:
4010 llvm_unreachable("unknown atomic op");
4013 QualType OMPArraySectionExpr::getBaseOriginalType(Expr *Base) {
4014 unsigned ArraySectionCount = 0;
4015 while (auto *OASE = dyn_cast<OMPArraySectionExpr>(Base->IgnoreParens())) {
4016 Base = OASE->getBase();
4017 ++ArraySectionCount;
4019 while (auto *ASE = dyn_cast<ArraySubscriptExpr>(Base->IgnoreParens())) {
4020 Base = ASE->getBase();
4021 ++ArraySectionCount;
4023 auto OriginalTy = Base->getType();
4024 if (auto *DRE = dyn_cast<DeclRefExpr>(Base))
4025 if (auto *PVD = dyn_cast<ParmVarDecl>(DRE->getDecl()))
4026 OriginalTy = PVD->getOriginalType().getNonReferenceType();
4028 for (unsigned Cnt = 0; Cnt < ArraySectionCount; ++Cnt) {
4029 if (OriginalTy->isAnyPointerType())
4030 OriginalTy = OriginalTy->getPointeeType();
4032 assert (OriginalTy->isArrayType());
4033 OriginalTy = OriginalTy->castAsArrayTypeUnsafe()->getElementType();